CN119687244A

CN119687244A - Pressure measuring valve and pressure measuring device

Info

Publication number: CN119687244A
Application number: CN202411810029.6A
Authority: CN
Inventors: 朱汉银; 朱乔峰; 赵昶; 杨利民; 常志鹏; 刘百奇; 刘建设
Original assignee: Beijing Xinghe Power Aerospace Technology Co ltd; Beijing Xinghe Power Equipment Technology Co Ltd; Anhui Galaxy Power Equipment Technology Co Ltd; Galactic Energy Shandong Aerospace Technology Co Ltd
Current assignee: Beijing Xinghe Power Aerospace Technology Co ltd; Beijing Xinghe Power Equipment Technology Co Ltd; Anhui Galaxy Power Equipment Technology Co Ltd; Galactic Energy Shandong Aerospace Technology Co Ltd
Priority date: 2024-12-10
Filing date: 2024-12-10
Publication date: 2025-03-25

Abstract

The application provides a pressure measuring valve. The pressure measuring valve comprises an inlet valve body, an outlet valve body, a valve core, a valve plug and a plug, wherein the inlet valve body is provided with a first cavity, a valve seat and a second cavity which are sequentially arranged, the outlet valve body is sleeved outside part of the inlet valve body, a flow passage is formed in a second section, which is far away from the inlet valve body, and is communicated with the second cavity and used for being connected with a storage tank, the valve core is arranged in the second cavity and used for blocking the communication hole or separating from the communication hole so that the communication hole, the second cavity and the flow passage are sequentially communicated, the plug is arranged in the first cavity in a non-pressure measuring state, the outer peripheral wall of the plug is in sealing connection with the inner peripheral wall of the first cavity, and a pressure measuring joint is arranged in a pressure measuring state. The pressure measuring valve provided by the application can ensure a tight sealing effect in a non-pressure measuring state and a pressure measuring state, meets the pressure measuring working condition and pressure measuring requirement of a rocket pressurizing and conveying system, ensures the accuracy of a pressure measuring result, and can also ensure the carrying capacity, environment and personnel safety of a carrier rocket.

Description

Pressure measuring valve and pressure measuring device

Technical Field

The application relates to the technical field of pressurization systems of carrier rockets, in particular to a pressure measuring valve and pressure measuring equipment.

Background

The pressure measuring valve is a valve commonly used in a pressurizing and conveying system of a carrier rocket, is connected with the storage tank and is used for measuring pressure of the storage tank.

The pressure measuring valve is a one-way valve in a non-pressure measuring state, propellant medium in the storage tank is prevented from being discharged through the pressure measuring valve, the pressure measuring connector is used for communicating the pressure measuring valve with the pressure sensor in the pressure measuring state, the pressure measuring connector is taken out after the pressure measuring is finished, and the pressure measuring valve is automatically closed, so that propellant medium in the storage tank is prevented from being discharged through the pressure measuring valve.

However, in the related art, in the process of mutually switching the non-pressure measurement state and the pressure measurement state, propellant medium is easy to leak from the pressure measurement valve, so that the pressure measurement result is inaccurate, and the carrying capacity of the carrier rocket is easy to be influenced, and even the environment and the safety of personnel are threatened.

Disclosure of Invention

Aiming at the defects of the prior art, the application provides a pressure measuring valve which is used for solving the technical problem that propellant medium is easy to leak from the pressure measuring valve in the process of mutually switching a non-pressure measuring state and a pressure measuring state in the related art.

In a first aspect, embodiments of the present application provide a pressure measurement valve comprising:

the inlet valve body is provided with a first chamber, a valve seat and a second chamber which are sequentially arranged, wherein the valve seat is provided with a communication hole;

the first section of the outlet valve body is sleeved outside part of the inlet valve body, and the second section of the outlet valve body far away from the inlet valve body is provided with a flow passage which is communicated with the second chamber and is used for connecting the storage tank;

The valve core is arranged in the second cavity and used for blocking the communication hole or separating from the communication hole so that the communication hole, the second cavity and the flow channel are communicated in sequence;

The first chamber is internally provided with a plug in a non-pressure measuring state, the outer peripheral wall of the plug is in sealing connection with the inner peripheral wall of the first chamber, and a pressure measuring joint is arranged in a pressure measuring state.

In some possible embodiments, the valve element is closed at one end and adjacent to the valve seat, hollow in the interior, open at the other end and in communication with the flow passage of the second section of the outlet valve body.

In some possible embodiments, the pressure measurement valve further comprises an elastic member;

The elastic piece is arranged in the valve core and extends out of the opening at the other end, one end of the elastic piece is close to or abutted against one closed end of the valve core, and the other end of the elastic piece is close to or abutted against the second section of the outlet valve body.

In some possible embodiments, the outer diameter of the first section of the outlet valve body is greater than the outer diameter of the second section of the outlet valve body;

A stepped surface is formed at the junction of the first and second sections, facing the inlet valve body.

In some possible embodiments, the open area at the other end of the valve spool is greater than the flow passage inlet area in the second section of the outlet valve body.

In a second aspect, embodiments of the present application also provide a pressure measurement apparatus comprising a pressure measurement joint and a pressure measurement valve as provided in any one of the first aspects above;

in the pressure measuring state, one end of the pressure measuring connector is connected with the pressure sensor, and the part of the other end of the pressure measuring connector is hermetically arranged in the first cavity of the pressure measuring valve.

In some possible embodiments, the other end of the pressure tap is configured to move within the first chamber of the pressure valve toward the valve seat of the pressure valve under a first pressure condition of the pressure state, the outer peripheral wall being sealingly connected with the inner peripheral wall of the first chamber.

In some possible embodiments, the pressure tap comprises a hollow body portion, and a push rod protruding from the body portion, an end of the push rod facing a valve core of the pressure tap;

Under the first pressure condition, the ejector rod passes through the communication hole of the valve seat until contacting the valve core;

under the second pressure condition, the ejector rod pushes the valve core until contacting or abutting with the second section of the outlet valve body of the pressure measuring valve.

In some possible embodiments, the peripheral wall of the body portion is fluted;

In the pressure measuring state, a sealing piece is arranged in the groove, so that the outer peripheral wall of the pressure measuring joint is in sealing connection with the inner peripheral wall of the first chamber.

In some possible embodiments, the pressure measuring joint further comprises a connecting seat vertically fixed in the body part, and one side facing the valve core is fixedly connected with the ejector rod;

the connecting seat is provided with a dielectric hole along the axial direction and is communicated with the pressure sensor and the communication hole.

The technical scheme provided by the embodiment of the application has the beneficial technical effects that:

The inlet valve body in the pressure measuring valve provided by the embodiment of the application is outwards provided with the communication hole in the interior, the flow channel of the outlet valve body is connected with the storage tank, and the valve core is positioned in the second chamber 13, namely between the communication hole and the flow channel. In the non-pressure-measuring state, the pressure measuring valve is used as a one-way valve, and under the pressure of propellant medium (such as liquid fuel or oxidant) in the storage tank communicated with the flow passage, the valve core seals the communication hole to form a first sealing structure so as to prevent the propellant medium in the storage tank from leaking out of the communication hole of the inlet valve body. And the plug is arranged in the first cavity of the inlet valve body in a sealing way and is positioned at one end of the communication hole far away from the valve core, so that a second sealing structure can be formed, and propellant medium is further prevented from leaking out from the communication hole.

In the conversion process of the non-pressure measurement state and the pressure measurement state, namely during the replacement of the plug and the pressure measurement connector, the valve core always seals the communication hole, so that propellant medium in the storage tank is effectively prevented from leaking out of the communication hole. The pressure measuring valve provided by the application can ensure a tight sealing effect in a non-pressure measuring state and a pressure measuring state, meets the pressure measuring working condition and pressure measuring requirement of a rocket pressurizing and conveying system, ensures the accuracy of a pressure measuring result, and can also ensure the carrying capacity, environment and personnel safety of a carrier rocket.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a pressure measuring valve according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of an outlet valve body of a pressure measuring valve according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a valve core of a pressure measuring valve according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a pressure measuring valve in a non-pressure measuring state according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a pressure measuring device according to an embodiment of the present application under a first pressure condition in a pressure measuring state;

FIG. 6 is a schematic diagram of a pressure measuring apparatus according to an embodiment of the present application under a second pressure condition in a pressure measuring state;

fig. 7 is a schematic structural diagram of a pressure measurement joint according to an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view at AA' of FIG. 7;

fig. 9 is a schematic cross-sectional view at BB' in fig. 7.

Reference numerals:

100-pressure measuring valve;

10-inlet valve body, 11-first chamber, 12-valve seat, 121-communication hole, 13-second chamber;

20-outlet valve body, 21-first section, 22-second section, 221-runner, 222-step surface;

30-valve core and 31-inclined hole

40-Elastic member;

200-plugs;

300-pressure measuring joint;

31-body portion 310-groove;

32-ejector rods;

33-connecting seat and 330-dielectric hole.

Detailed Description

Embodiments of the present application are described below with reference to the drawings in the present application. It should be understood that the embodiments described below with reference to the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and the technical solutions of the embodiments of the present application are not limited.

As used herein, "said" and "the" may also include plural forms, unless specifically stated otherwise, as will be understood by those skilled in the art. It should be further understood that the terms "comprises" and/or "comprising," when used in this specification of the present application, specify the presence of stated features, integers, elements, and/or components, but do not preclude the presence or addition of other features, information, data, operations, elements, components, and/or groups thereof, etc., that are implemented as desired in the art. The term "and/or" as used herein refers to at least one of the items defined by the term, e.g., "a and/or B" may be implemented as "a", or as "B", or as "a and B".

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The terms involved in the present application will be first described and explained:

the pressure measuring valve is connected with a storage tank in the carrier rocket pressurizing and conveying system, monitors the pressure of propellant medium in the storage tank and ensures that the pressure is within a safe range.

And the pressure measuring joint is used for connecting the pressure sensor and the pressure measuring valve in a pressure measuring state, so that the pressure sensor monitors the pressure of the propellant medium in the storage tank.

In the related art, in the process of mutually switching a non-pressure measurement state and a pressure measurement state, propellant medium is easy to leak from a pressure measurement valve, so that a pressure measurement result is inaccurate, and the carrying capacity of a carrier rocket is easy to influence, and even the environment and the safety of personnel are threatened.

The application provides a pressure measuring valve and pressure measuring equipment, and aims to solve the technical problems in the related art.

The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. It should be noted that the following embodiments may be referred to, or combined with each other, and the description will not be repeated for the same terms, similar features, similar implementation steps, and the like in different embodiments.

An embodiment of the present application provides a pressure measuring valve 100, and a schematic structural diagram of the pressure measuring valve 100 is shown in fig. 1, and the pressure measuring valve 100 includes an inlet valve body 10, an outlet valve body 20 and a valve core 30.

The inlet valve body 10 has a first chamber 11, a valve seat 12 provided with a communication hole 121, and a second chamber 13 arranged in this order.

The first section 21 of the outlet valve body 20 is sleeved outside part of the inlet valve body 10, and the second section 22 far away from the inlet valve body 10 is provided with a flow passage 221 which is communicated with the second chamber 13 and is used for connecting a storage tank.

The valve body 30 is provided in the second chamber 13 to close the communication hole 121 or to be separated from the communication hole 121 so that the communication hole 121, the second chamber 13 and the flow passage 221 are sequentially communicated.

Referring to fig. 4, a plug 200 is disposed in the first chamber 11 in a non-pressure-measuring state, and an outer peripheral wall of the plug 200 is hermetically connected with an inner peripheral wall of the first chamber 11. Referring to fig. 5-6, the pressure tap 300 is disposed in the first chamber 11 under pressure.

The pressure measuring valve 100 according to the present embodiment is provided with the inlet valve body 10 facing outward, the communication hole 121 being provided in the inside, the flow passage 221 of the outlet valve body 20 being connected to the tank, and the valve core 30 being enclosed in the second chamber 13 by the inlet valve body 10 and the outlet valve body 20, i.e., being located between the communication hole 121 and the flow passage 221. In the non-pressure-measuring state, the pressure measuring valve 100 functions as a check valve, and the valve element 30 seals the communication hole 121 to form a first seal structure by pressure from a propellant medium (e.g., liquid fuel or oxidizer, etc.) in the tank communicating with the flow passage 221, preventing the propellant medium in the tank from being discharged from the communication hole 121 of the inlet valve body 10. The plug 200 is provided in the first chamber 11 of the inlet valve body 10 in a sealed manner, and is positioned at one end of the communication hole 121 away from the valve element 30, so that a second sealing structure can be formed, and the leakage of the propellant medium from the communication hole 121 can be further prevented.

During the conversion process of the non-pressure measurement state and the pressure measurement state, namely, during the replacement of the plug 200 and the pressure measurement joint 300, the valve core 30 always seals the communication hole 121, so that the propellant medium in the storage tank is effectively prevented from leaking out of the communication hole 121. The pressure measuring valve 100 provided by the application can ensure a tight sealing effect in a non-pressure measuring state and a pressure measuring state, meets the pressure measuring working condition and pressure measuring requirement of a rocket pressurizing and conveying system, ensures the accuracy of a pressure measuring result, and can also ensure the carrying capacity, environment and personnel safety of a carrier rocket.

It is understood that in the embodiment of the present application, the outer peripheral wall refers to the outer peripheral surface of each structure, and the inner peripheral wall refers to the side wall of each cavity structure forming each chamber, space or flow channel 221, and the like, and may also be understood as the inner surface of each hollow structure.

Alternatively, the first section 21 of the outlet valve body 20 is sleeved outside part of the inlet valve body 10, and is connected between the inner peripheral wall of the first section 21 of the outlet valve body 20 and the outer peripheral wall of the inlet valve body 10 in a sealing manner through a sealing member.

In some possible embodiments, referring to fig. 1-3, the valve core 30 is closed at one end and adjacent to the valve seat 12, hollow in the interior, and open at the other end and in communication with the flow passage 221 of the second section 22 of the outlet valve body 20.

In the present embodiment, the closed end of the valve body 30 faces the communication hole 121, and the open end faces the flow passage 221 of the second section 22 of the outlet valve body 20. Under the pressure from the tank communicating with the flow passage 221, the valve body 30 blocks the communication hole 121, preventing the medium in the tank from leaking out of the communication hole 121 of the inlet valve body 10. When the closed end of the valve body 30 has a certain pressure, the valve body 30 is pushed to move toward the second section 22 of the outlet valve body 20, so that the communication hole 121, the second chamber 13 and the flow passage 221 are sequentially communicated, thereby enabling the pressure measuring medium from the pressure sensor to reach the pressure measuring valve 100 without the propellant medium in the tank flowing out to the pressure measuring joint 300.

Alternatively, referring to fig. 3, the valve core 30 is hollow, and the outer peripheral wall is provided with an inclined hole 31. The inclined hole 31 communicates the space inside the valve body 30 with the second chamber 13, and when a certain pressure is applied to the closed end of the valve body 30, the valve body 30 is pushed to move toward the second section 22 of the outlet valve body 20, so that the communication hole 121, the second chamber 13, the inclined hole 31, the space inside the valve body 30 and the flow passage 221 are sequentially communicated.

In some possible embodiments, referring to FIG. 1, the pressure measurement valve 100 further includes an elastic member 40.

The elastic member 40 is disposed inside the valve core 30 and extends out of the opening at the other end, one end is close to or abutting against the closed end of the valve core 30, and the other end is close to or abutting against the second section 22 of the outlet valve body 20.

In this embodiment, one end of the elastic member 40 is fixed to the inner sidewall of the closed end of the valve core 30, and the other end is fixed to the stepped surface 222 of the second section 22 of the outlet valve body 20 facing the first section 21. Under the action of the elastic force of the elastic member 40 and the internal pressure of the tank, the valve core 30 seals the communication hole 121 and is connected with the valve seat 12 in a sealing manner.

Alternatively, the elastic member 40 may be a spring, and is fixedly connected to the valve core.

In some possible embodiments, referring to fig. 2, the outer diameter of the first section 21 of the outlet valve body 20 is greater than the outer diameter of the second section 22 of the outlet valve body 20.

A stepped surface 222 is formed at the junction of the first section 21 and the second section 22, facing the inlet valve body 10.

In this embodiment, the outer peripheral wall of the outlet valve body 20 is stepped, the inner peripheral wall is also stepped, and the outer diameter of the first section 21 of the outlet valve body 20 is larger than the outer diameter of the second section 22 of the outlet valve body 20, so that a stepped surface 222 is formed on the inner peripheral wall of the outlet valve body 20, so that the open end of the valve core 30 can be blocked by the stepped surface 222, and the valve core 30 is prevented from moving out of the pressure measuring valve 100 due to excessive pressure from the pressure measuring joint 300.

In some possible embodiments, the open area of the other end of the valve spool 30 is greater than the inlet area of the flow passage 221 in the second section 22 of the outlet valve body 20.

In this embodiment, the flow channel 221 in the second section 22 of the outlet valve body 20 is narrower, which can make the whole pressure measuring valve 100 more compact in structure and save space, and the flow channel 221 is narrower, which can reduce the flow inertia of the fluid, so that the pressure measuring valve 100 has a faster response speed to the pressure change and is convenient for measuring pressure.

Based on the same inventive concept, the embodiment of the present application also provides a pressure measuring apparatus, the structure of which is schematically shown in fig. 5 and 6, and the pressure measuring apparatus includes a pressure measuring joint 300 and any one of the pressure measuring valves 100 provided in the above embodiments.

In the pressure measuring state, one end of the pressure measuring joint 300 is connected to a pressure sensor (not shown), and the other end is provided in the first chamber 11 of the pressure measuring valve 100 in a sealed manner.

The pressure measuring device provided in this embodiment includes any one of the pressure measuring valves 100 provided in the foregoing embodiments, and its implementation principle is similar, and will not be described herein. During the transition between the non-pressure-measuring state and the pressure-measuring state, i.e., during the replacement of the plug 200 and the pressure-measuring joint 300, the valve core 30 always seals the communication hole 121, so that the propellant medium in the storage tank is effectively prevented from leaking from the communication hole 121, and the pressure-measuring medium from the pressure sensor is also prevented from leaking from the pressure-measuring valve 100. The pressure measuring valve 100 provided by the application can ensure a tight sealing effect in a non-pressure measuring state and a pressure measuring state, meets the pressure measuring working condition and pressure measuring requirement of a rocket pressurizing and conveying system, ensures the accuracy of a pressure measuring result, and can also ensure the carrying capacity, environment and personnel safety of a carrier rocket.

In some possible embodiments, referring to fig. 5, under a first pressure condition of the pressure measurement state, the other end of the pressure measurement joint 300 is configured to move within the first chamber 11 of the pressure measurement valve 100 toward the valve seat 12 of the pressure measurement valve 100, with the outer peripheral wall being in sealing connection with the inner peripheral wall of the first chamber 11.

In this embodiment, under the action of the first pressure condition, the pressure measuring joint 300 moves towards the valve seat 12, and during the movement, the outer peripheral wall of the pressure measuring joint 300 is in sealing connection with the inner peripheral wall of the first chamber 11, so that the tightness of the pressure measuring valve 100 can be ensured, and the possibility that the propellant medium in the storage tank leaks out from the pressure measuring valve 100 can be reduced.

In some possible embodiments, referring to fig. 5, 6 and 7, the pressure tap 300 includes a hollow body 31 and a stem 32 protruding from the body 31, and an end of the stem 32 faces the valve core 30 of the pressure valve 100.

Referring to fig. 5, under the first pressure condition, the stem 32 passes through the communication hole 121 of the valve seat 12 until contacting the valve spool 30.

Referring to fig. 6, under a second pressure condition, the stem 32 pushes the valve spool 30 until it contacts or abuts the second section 22 of the outlet valve body 20 of the pressure measurement valve 100.

In the present embodiment, the jack 32 of the pressure measuring joint 300 protrudes toward the valve body 30 and is smaller in size than the communication hole 121, and the valve body 30 can be pushed open through the communication hole 121, so that the communication hole 121, the second chamber 13, and the flow passage 221 are sequentially communicated, and further the pressure sensor is communicated with the tank through the hollow body portion 31.

In some possible embodiments, referring to fig. 7, a groove 310 is formed on the outer peripheral wall of the body 31.

In the pressure measurement state, a seal is provided in the groove 310 so that the outer peripheral wall of the pressure measurement joint 300 is in sealing connection with the inner peripheral wall of the first chamber 11.

In this embodiment, the groove 310 is used for accommodating a sealing element, and the sealing element can be in sealing connection with the outer peripheral wall of the body portion 31 of the pressure measuring connector 300 and the inner peripheral wall of the first chamber 11, so as to ensure tightness between the pressure measuring valve 100 and the external environment in the pressure measuring state, prevent the propellant medium in the storage tank and the pressure measuring medium in the body portion 31 from being discharged, and ensure stability and reliability of the pressurizing and conveying system of the carrier rocket.

Optionally, the axial distance between the sealing element and the other end of the pressure measuring joint 300 is smaller than the axial distance between the ejector rod 32 and the valve core 30, so that when the ejector rod 32 does not contact the valve core 30, the pressure measuring joint 300 is already in sealing connection with the inlet valve body 10, and the tightness of the pressure measuring equipment is effectively ensured.

Optionally, each sealing element provided by the embodiment of the application comprises a sealing ring, each part of the pressure measuring equipment is cylindrical, and the sealing ring is sleeved outside the inlet valve body 10, the plug 200, the body part 31 and other parts to form circumferential sealing.

In some possible embodiments, referring to FIGS. 7-9, the pressure tap 300 further includes a connection block 33.

The connecting seat 33 is vertically fixed in the body 31, and one side facing the valve core 30 is fixedly connected with the ejector rod 32.

The connecting seat 33 is provided with a dielectric hole 330 along the axial direction for communicating the pressure sensor with the communication hole 121.

In the present embodiment, the connecting seat 33 is perpendicular to the axial direction of the body 31, and is disposed in the body 31, and the outer peripheral wall is fixed to the inner peripheral wall of the body 31, with one side facing the pressure sensor and the other side facing the valve core 30. The ejector rod 32 is fixed on the connecting seat 33, and the top end protrudes from the body portion 31, so as to conveniently pass through the communication hole 121 to contact or abut with the valve core 30, thereby pushing the valve core 30.

The connecting seat 33 is provided with a dielectric hole 330 along the axial direction, and can communicate the pressure sensor with the communication hole 121 to convey the pressure measuring medium to the pressure measuring valve 100.

In some possible embodiments, under the second pressure condition, the distance between the valve core 30 and the outlet valve body 20 is not greater than the distance between the body 31 of the pressure measuring joint 300 and the valve seat 12 of the pressure measuring valve 100, so that when the body 31 is not in contact with the valve seat 12 or just in contact with the valve seat 12, the valve core 30 is smoothly abutted against the stepped surface 222, the effectiveness and accuracy of the pressure measuring process are ensured, and the influence on the measurement result due to the fact that the body 31 is blocked by the valve seat 12 and cannot continue pushing the valve core 30 is avoided.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

1. The inlet valve body 10 in the pressure measuring valve 100 provided by the embodiment of the application faces outwards, the inside is provided with the communication hole 121, the flow channel 221 of the outlet valve body 20 is connected with the storage tank, and the valve core 30 is enclosed in the second chamber 13 by the inlet valve body 10 and the outlet valve body 20, namely, is positioned between the communication hole 121 and the flow channel 221. In the non-pressure-measuring state, the pressure measuring valve 100 functions as a check valve, and the valve element 30 seals the communication hole 121 to form a first seal structure by pressure from a propellant medium (e.g., liquid fuel or oxidizer, etc.) in the tank communicating with the flow passage 221, preventing the propellant medium in the tank from being discharged from the communication hole 121 of the inlet valve body 10. The plug 200 is provided in the first chamber 11 of the inlet valve body 10 in a sealed manner, and is positioned at one end of the communication hole 121 away from the valve element 30, so that a second sealing structure can be formed, and the leakage of the propellant medium from the communication hole 121 can be further prevented.

2. In the embodiment of the present application, the outer peripheral wall of the outlet valve body 20 is stepped, the inner peripheral wall is also stepped, and the outer diameter of the first section 21 of the outlet valve body 20 is larger than the outer diameter of the second section 22 of the outlet valve body 20, so that a stepped surface 222 is formed on the inner peripheral wall of the outlet valve body 20, so that the open end of the valve core 30 can be blocked by the stepped surface 222, and the valve core 30 is prevented from moving out of the pressure measuring valve 100 due to excessive pressure from the pressure measuring joint 300.

3. In the embodiment of the application, under the action of the first pressure condition, the pressure measuring joint 300 moves towards the valve seat 12, and in the moving process, the outer peripheral wall of the pressure measuring joint 300 is in sealing connection with the inner peripheral wall of the first chamber 11, so that the tightness of the pressure measuring valve 100 can be ensured, and the possibility that the propellant medium in the storage tank leaks out of the pressure measuring valve 100 is reduced.

4. In the embodiment of the present application, the ejector rod 32 of the pressure measuring joint 300 protrudes toward the valve core 30 and has a smaller size than the communication hole 121, and can push up the valve core 30 through the communication hole 121, so that the communication hole 121, the second chamber 13 and the flow channel 221 are sequentially communicated, and the pressure sensor is further communicated with the tank through the hollow body portion 31.

5. In the embodiment of the present application, the connecting seat 33 is perpendicular to the axial direction of the body 31, and is disposed in the body 31, and the outer peripheral wall is fixed with the inner peripheral wall of the body 31, with one side facing the pressure sensor and the other side facing the valve core 30. The ejector rod 32 is fixed on the connecting seat 33, and the top end protrudes from the body portion 31, so as to conveniently pass through the communication hole 121 to contact or abut with the valve core 30, thereby pushing the valve core 30. The connecting seat 33 is provided with a dielectric hole 330 along the axial direction, and can communicate the pressure sensor with the communication hole 121 to convey the pressure measuring medium to the pressure measuring valve 100.

In the description of the present application, directions or positional relationships indicated by words such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on exemplary directions or positional relationships shown in the drawings, are for convenience of description or simplification of describing embodiments of the present application, and do not indicate or imply that the devices or components referred to must have a specific orientation or be configured and operated in a specific orientation, and thus are not to be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly connected, or indirectly connected through an intermediary, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The foregoing is only a part of the embodiments of the present application, and it should be noted that, for those skilled in the art, other similar implementation means based on the technical idea of the present application may be adopted without departing from the technical idea of the solution of the present application, which is also within the protection scope of the embodiments of the present application.

Claims

1. A pressure measuring valve, characterized in that it comprises:

The inlet valve body comprises a first chamber, a valve seat with a communication hole, and a second chamber which are arranged in sequence;

An outlet valve body, a first section of which is sleeved outside a portion of the inlet valve body, and a second section away from the inlet valve body has a flow channel, which is communicated with the second chamber and is used to connect to the storage tank;

a valve core, disposed in the second chamber, for blocking the communicating hole, or being separated from the communicating hole, so that the communicating hole, the second chamber and the flow channel are connected in sequence;

The first chamber is used to set a plug in a non-pressure measuring state, the outer peripheral wall of the plug is sealed and connected to the inner peripheral wall of the first chamber, and a pressure measuring joint is set in the pressure measuring state.

2. The pressure measuring valve according to claim 1 is characterized in that one end of the valve core is closed and close to the valve seat, the interior is hollow, and the other end is open and connected to the flow channel of the second section of the outlet valve body.

3. The pressure measuring valve according to claim 2, further comprising: an elastic member;

The elastic member is arranged inside the valve core and extends out of an opening at the other end, with one end close to or abutting against the closed end of the valve core and the other end close to or abutting against the second section of the outlet valve body.

4. The pressure measuring valve according to claim 1, characterized in that the outer diameter of the first section of the outlet valve body is greater than the outer diameter of the second section of the outlet valve body;

A stepped surface is formed at a connection between the first section and the second section, facing the inlet valve body.

5. The pressure measuring valve according to claim 1, characterized in that the opening area of the other end of the valve core is larger than the inlet area of the flow channel in the second section of the outlet valve body.

6. A pressure measuring device, characterized in that it comprises: a pressure measuring joint and a pressure measuring valve as described in any one of claims 1 to 5;

In the pressure measuring state, one end of the pressure measuring joint is connected to the pressure sensor, and the other end is sealed and arranged in the first chamber of the pressure measuring valve.

7. The pressure measuring device according to claim 6 is characterized in that under the first pressure condition of the pressure measuring state, the other end of the pressure measuring connector is configured to move toward the valve seat of the pressure measuring valve in the first chamber of the pressure measuring valve, and the outer peripheral wall is sealed and connected to the inner peripheral wall of the first chamber.

8. The pressure measuring device according to claim 7, characterized in that the pressure measuring joint comprises a hollow body portion and a push rod protruding from the body portion, and an end of the push rod faces the valve core;

Under a first pressure condition, the push rod passes through the communicating hole of the valve seat until it contacts the valve core of the pressure testing valve;

Under the second pressure condition, the push rod pushes the valve core until it contacts or abuts against the second section of the outlet valve body of the pressure testing valve.

9. The pressure measuring device according to claim 8, characterized in that a groove is provided on the outer peripheral wall of the main body;

In the pressure measuring state, a sealing member is arranged in the groove, so that the outer peripheral wall of the pressure measuring joint is sealedly connected to the inner peripheral wall of the first chamber.

10. The pressure measuring device according to claim 8, characterized in that the pressure measuring joint further comprises: a connecting seat, vertically fixed in the main body, and fixedly connected to the push rod on a side facing the valve core;

The connecting seat is provided with a medium hole along the axial direction, connecting the pressure sensor and the connecting hole.