CN108167504A - Ratchet self-locking type solenoid valve - Google Patents

Abstract

The application discloses a ratchet self-locking solenoid valve. Among them, the solenoid valve includes a valve body, wherein the valve body includes: an inlet; an outlet; an air path between the inlet and the outlet; a main valve core for opening or closing the air path; channel; and an exhaust channel connecting the outlet with the back pressure chamber of the main valve core. The solenoid valve also includes a ratchet part and a sub-spool, the ratchet part is configured to switch between a first position state and a second position state by means of its own rotation, wherein in the first position state, the ratchet part drives the sub-spool to open The exhaust passage, in the second position state, the ratchet component drives the auxiliary valve core to close the exhaust passage.

Description

Ratchet self-locking solenoid valve

technical field

The present application relates to the field of solenoid valves, in particular to a ratchet self-locking solenoid valve for launch vehicles.

Background technique

Solenoid valves are widely used in booster delivery systems of launch vehicles, and are used for pressurization of storage tanks, exhaust of storage tanks, pressurization of gas cylinders, exhaust of gas cylinders, and control of other valves. The working principle of the solenoid valve is: when the solenoid valve is energized, under the action of electromagnetic suction, the armature moves, the valve opens, and when the power supply continues, the valve remains open; when the solenoid valve is powered off, the electromagnetic suction disappears, and the armature is under the action of spring force and air pressure. Movement, cut off the air supply channel, the valve is closed.

Solenoid valve products can be divided into long-term work system, short-time work system and repeated short-time work system according to the working system; they can be divided into direct-acting type and pilot type according to the action principle; they can be divided into normally open type and normally closed type according to the original working state. According to the temperature of the medium, it can be divided into normal temperature type and low temperature type; according to whether it is self-locking, it can be divided into self-locking type and non-self-locking type; according to the self-locking method, it can be divided into mechanical self-locking, pneumatic self-locking or permanent magnetic self-locking , The self-locking solenoid valve is suitable for working for a long time.

At present, mechanical self-locking solenoid valves are rarely used, and self-locking solenoid valves for launch vehicles are generally pneumatic self-locking or permanent magnetic self-locking. The pneumatic self-locking solenoid valve needs to design a special air circuit structure, and the structure is more complicated; the permanent magnet self-locking solenoid valve relies on the magnetic force of the permanent magnet to keep the armature in this state after power failure, but the magnetic force of the permanent magnet will decrease after a long time to the trend.

The invention proposes a ratchet self-locking solenoid valve structure for launch vehicles. The ratchet structure is designed to achieve mechanical self-locking, the structure is reliable, and the solenoid valve can be kept in an open or closed state after power failure.

Contents of the invention

The embodiment of the present invention provides a ratchet self-locking solenoid valve, which at least solves the technical problem that the solenoid valve is unreliable in action and unsuitable for long-time work.

According to an aspect of an embodiment of the present invention, a solenoid valve is provided, and the solenoid valve includes a valve body, wherein the valve body includes: an inlet; an outlet; an air path between the inlet and the outlet; a main valve core for opening or closing the air road; the intake passage connecting the inlet with the back pressure chamber of the main valve core; and the exhaust passage connecting the outlet and the back pressure chamber, characterized in that the solenoid valve also includes a ratchet part and a secondary valve core, and the ratchet part is configured to rely on itself Rotation to switch between the first position state and the second position state, wherein in the first position state, the ratchet part drives the auxiliary spool to open the exhaust passage, and in the second position state, the ratchet part breaks away from the auxiliary spool, Thus, the sub-spool closes the exhaust passage.

Optionally, the solenoid valve further includes an outer wheel sleeved on the outside of the ratchet part, the inner wall of the outer wheel is provided with a plurality of outer gear teeth that cooperate with the ratchet teeth of the ratchet part, and the inner wall is provided with a plurality of first connecting parts and a plurality of second connecting parts. The first connecting part and the second connecting part are respectively used to connect two adjacent outer gear teeth, and are arranged alternately with each other, wherein when the ratchet teeth are located at the first connecting part, the ratchet component is in the first position state, and when When the ratchet teeth are located at the second connecting portion, the ratchet component is in the second position state.

Optionally, the solenoid valve also includes a push rod arranged in the outer wheel, a sleeve is provided at one end of the push rod, and a push rod tooth is provided at the end of the cylinder wall of the sleeve to cooperate with the ratchet teeth of the ratchet part, so that the push rod The ratchet part is driven to rotate by linear motion.

Optionally, the electromagnetic valve further includes an electromagnetic drive mechanism for driving the ejector rod to move linearly.

Optionally, the outer wall of the ejector rod is provided with a plurality of limit blocks for preventing the ejector rod from rotating.

Optionally, the electromagnetic driving mechanism includes an armature and an electromagnet, and the armature is configured to drive the ejector rod and the ratchet under the action of electromagnetic attraction when the electromagnetic valve is energized.

Optionally, the air path of the valve body of the solenoid valve is a pilot structure.

Optionally, the solenoid valve further includes an electrical socket configured to connect the solenoid valve with an external power source.

Optionally, a top shaft is provided at the end of the ratchet component to abut against the auxiliary valve core.

Optionally, the auxiliary spool is arranged on the back of the main spool, and a spring abutting against the auxiliary spool and the main spool is arranged between the auxiliary spool and the main spool.

In the embodiment of the present invention, by setting the ratchet self-locking structure in the solenoid valve, the mechanical self-locking is achieved, the structure is reliable, and the solenoid valve can be kept in this state stably after the power is turned off. The valve body gas circuit is a pilot structure, It can be applied to large-diameter and large-flow systems, thereby solving the technical problem that the solenoid valve is suitable for long-term work.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

1 is a schematic diagram of a ratchet self-locking solenoid valve according to an embodiment of the present invention;

2A and 2B are schematic diagrams of the ejector rod of the ratchet self-locking solenoid valve according to an embodiment of the present invention;

3 is a schematic diagram of a ratchet component according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of when the ejector rod engages with the ratchet part according to an embodiment of the present invention; and

Fig. 5 is a schematic diagram of an outer wheel according to an embodiment of the present invention.

In the figure, 1. armature, 2. electromagnet, 3. electric socket, 4. ejector rod, 5. outer wheel, 6. ratchet part, 7. auxiliary valve core, 8. pressure sleeve, 9. spring, 10. main valve core, 11. valve body.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

Example 1

Referring to Fig. 1, this embodiment provides an aspect according to the embodiment of the present invention, providing a solenoid valve, the solenoid valve includes a valve body 11, wherein the valve body 11 includes: an inlet; an outlet; the gas between the inlet and the outlet The main valve core 10 is used to open or close the air circuit; the inlet passage connecting the inlet and the back pressure chamber of the main valve core 10; and the exhaust passage connecting the outlet and the back pressure chamber. The solenoid valve also includes a ratchet part 6 and a secondary spool 7, the ratchet part 6 is configured to switch between a first position state and a second position state by means of its own rotation, wherein in the first position state, the ratchet part 6 drives The auxiliary spool 7 opens the exhaust passage, and in the second position state, the ratchet component 6 drives the auxiliary spool 7 to close the exhaust passage.

Therefore, through the above-mentioned ratchet self-locking solenoid valve and the structure of the ratchet self-locking solenoid valve proposed in this patent, the solenoid valve can be self-locked in the open and closed states, which belongs to mechanical self-locking and improves the reliability of the solenoid valve action.

Optionally, the solenoid valve also includes an outer wheel 5 sleeved on the outside of the ratchet part 6, the inner wall 52 of the outer wheel 5 is provided with a plurality of outer gear teeth 53 that cooperate with the ratchet teeth 62 of the ratchet part 6, and the inner wall 52 is provided with a plurality of first The connecting portion 54 and a plurality of second connecting portions 55, the first connecting portion 54 and the second connecting portion 55 are respectively used to connect two adjacent outer gear teeth 53, and are arranged alternately with each other, wherein when the ratchet gear tooth 62 is located at the first When the ratchet member 6 is at the first connection portion 54 , and when the ratchet tooth 62 is at the second connection portion 55 , the ratchet member 6 is at the second position state.

Thus, through the above arrangement, the rotation of the ratchet member 6 can be converted into the switching of the position state of the ratchet member 6 . Referring to FIG. 3 , ratchet teeth 62 are provided on the outside of the ratchet component 6 , and the ends of the ratchet teeth are helical tooth surfaces 64 .

Moreover, referring to FIG. 5 , the outer wheel 5 includes a sleeve 51 , and the ratchet component 6 can be sleeved inside the sleeve 51 . Furthermore, the inner wall 52 of the sleeve 51 of the outer wheel 5 is provided with outer wheel teeth 53 . Furthermore, a first connecting portion 54 and a second connecting portion 55 are respectively connected between the outer gear teeth 53 . Wherein, the ratchet teeth 62 of the ratchet member 6 can be switched between the first connecting portion 54 and the second connecting portion 55 by the rotation of the ratchet member 6 . Since the positions of the tops of the first connecting portion 54 and the second connecting portion 55 are different, the positions of the ratchet teeth 62 of the ratchet member 6 are also different when they are located at the first connecting portion 54 and when they are located at the second connecting portion 55, so that when When the ratchet teeth 62 of the ratchet member 6 are located at the first connecting portion 54 , the ratchet member 6 is in the first position state, and when the ratchet teeth 62 are located at the second connection portion 55 , the ratchet member 6 is in the second position state.

Optionally, as shown in Fig. 1 to Fig. 4, the solenoid valve also includes a push rod 4 arranged in the outer wheel 5, a sleeve 42 is provided at one end of the push rod 4, and a ratchet is provided at the end of the wall of the sleeve. The ratchet teeth 62 of the part 6 are matched with the ejector rod teeth 44, so that the ejector rod 4 drives the ratchet part 6 to rotate through linear motion.

1 to 4, the push rod 4 is also arranged in the outer wheel 5, and one end of the push rod 4 is provided with a sleeve 42, so that the hollow inside the sleeve 42 can be used to accommodate the main shaft portion 61 of the ratchet teeth 62, Thus, the ejector rod teeth 44 at the end of the sleeve 42 abut against the ratchet teeth of the ratchet component 6, thereby driving the ratchet component 6 to leave the first connecting portion 54 or the second connecting portion 55 of the outer wheel 5, and when the ratchet gear of the ratchet component 6 When the tooth 62 moves out from between the outer gear teeth 53, the ratchet component 6 will rotate due to the abutment of the end slope 64 of the ratchet tooth 62 and the end slope 45 of the ejector rod tooth 44 (shown in FIG. 4 ). Therefore, when the push rod 4 is retracted, the ratchet teeth 62 of the ratchet component 6 switch from the position of being engaged with the first connecting portion 54 to the position of engaging with the second connecting portion 55 , or from being engaged with the second connecting portion 55 The position is switched to the position where it is engaged with the first connecting portion 54 . Thus, the ratchet component 6 can be switched between the first position state and the second position state.

Optionally, the outer wall of the ejector rod 4 is provided with a plurality of limit blocks 43 for preventing the ejector rod from rotating. Therefore, the push rod 4 is prevented from rotating in the outer wheel 5, and then the ratchet component 6 is driven to rotate.

Optionally, as shown in FIG. 1 , the solenoid valve further includes an electromagnetic drive mechanism for driving the ejector rod 4 to move linearly.

Optionally, as shown in FIG. 1 , the electromagnetic drive mechanism includes an armature 1 and an electromagnet 2 , and the armature 1 is configured to drive the push rod 4 and the ratchet component 6 under the action of electromagnetic attraction when the solenoid valve is energized.

Optionally, as shown in FIG. 1 , the air path of the valve body of the solenoid valve is a pilot-operated structure.

Optionally, as shown in FIG. 1 , the solenoid valve further includes an electrical socket 3 configured to connect the solenoid valve to an external power source.

Optionally, as shown in FIG. 1 , a top shaft 63 is provided at the end of the ratchet component 6 to abut against the auxiliary valve core 7 .

Optionally, as shown in FIG. 1 , the auxiliary spool 7 is arranged on the back of the main spool 9 and a contact between the auxiliary spool 7 and the main spool 9 is provided to abut against the auxiliary spool 7 and the main spool 9 . spring 8.

Specifically, as shown in FIG. 1, the solenoid valve of this embodiment is a ratchet self-locking solenoid valve, including an armature 1, an electromagnet 2, an electrical socket 3, a push rod 4, an outer wheel 5, a ratchet component 6, and a secondary valve core 7. , Pressure sleeve 8, spring 9, main valve core 10 and valve body 11.

The armature 1 and the electromagnet 2 constitute the driving mechanism of the solenoid valve for driving the push rod 4 and the ratchet part 6 . The armature 1 is installed inside the electromagnet 2, and there is a sliding guide between the two. The lower end surface of the armature 1 is in contact with the upper end surface of the ejector rod 4, and the lower end of the ejector rod 4 is in contact with the ratchet 6. The ratchet 6 can rotate under the force of the ejector rod 4. At the same time, the ratchet 6 can slide up and down in the outer wheel 5; The movement can push the auxiliary valve core 7 to move. The auxiliary valve core 7 is a cylindrical structure and can move up and down in the pressure sleeve 8. The guide gap between the auxiliary valve core 7 and the pressure sleeve 8 is a gas circulation channel.

Referring to FIG. 2A and FIG. 2B , the plunger 4 includes an abutment portion 41 abutting against the armature 1 and a hollow sleeve portion 42 . And referring to FIG. 3 , the ratchet component 6 includes a main shaft 61 at the upper end, a top shaft 63 at the lower end, and ratchet teeth 62 outside the main shaft.

The sleeve part 42 can accommodate the spindle part 61 so that the end slope 45 of the ejector pin tooth 44 at the end of the sleeve 42 can abut against the end slope 64 of the ratchet tooth 62 of the ratchet member 6 . Therefore, the force exerted by the push rod 4 can be transformed into a driving force for rotating the ratchet component 6 .

In addition, referring to FIG. 1 and FIG. 5 , both the push rod 4 and the ratchet component 6 are arranged in the outer wheel 5 . The outer wheel 5 is a hollow cylindrical structure capable of accommodating the push rod 4 and the ratchet component 6 . The push rod and the ratchet part 6 can move up and down in the outer wheel 5 .

And referring to FIG. 5 , outer gear teeth 53 are arranged on the inner surface of the outer wheel 5 . Moreover, a first connecting portion 54 or a second connecting portion 55 is provided between the outer gear teeth 53 . Wherein the first connecting portion 54 and the second connecting portion 55 are respectively used to connect two adjacent outer gear teeth 53, and the ends of the first connecting portion 54 and the second connecting portion 55 have different positions in the outer wheel 5, so that when the ratchet When the ratchet teeth 62 of the component 6 are engaged with the first connecting portion 54 and the second connecting portion 55 , the ratchet component 6 is in different positions.

Wherein, when the ratchet teeth 62 of the ratchet member 6 are engaged with the first connecting portion 54, the ratchet member 6 is in the first position state, and the top shaft 63 at the end of the ratchet member 6 pushes the auxiliary valve core 7 away, Thereby, the exhaust passage between the back pressure cavity of the main valve core 10 and the outlet is opened.

When the ratchet tooth 62 of the ratchet part 6 is engaged with the second connecting part 55, the ratchet part 6 is in the second position state, and at this time, the ratchet part 6 in the second position state is in the outer wheel 5 relative to the first position state. Recycling, so as to disengage from the auxiliary valve core 7, so that the auxiliary valve core 7 returns under the action of the spring force, thereby cutting off the exhaust passage between the back pressure chamber of the main valve core 10 and the outlet.

The specific working process of the solenoid valve is as follows:

After the solenoid valve is energized, the inner coil of the electromagnet 2 generates a current, and a certain amount of magnetic flux is generated at the gap between the armature 1 and the ejector rod 4. Under the action of the magnetic flux, electromagnetic attraction is generated, and the electromagnetic attraction attracts the armature 1 to the outer wheel 5, and then Push the ejector rod 4 and drive the ratchet part 6 to move downward to disengage from the outer gear teeth 53, and the ratchet part 6 pushes away the auxiliary valve core 7. At the same time, the ratchet part 6 rotates and meshes with the outer gear teeth 53 of the outer wheel 5 so that the ratchet part 62 of the ratchet 6 is snapped into the first connection part 54 so that the ratchet part 6 enters the first position state. After the solenoid valve is powered off, the electromagnetic attraction disappears and the armature 1 is free. The ratchet component 6 remains unchanged in the first position. The gas in the back pressure chamber of the main valve core 9 is discharged to the outlet through the guide gap of the auxiliary valve core 7 and the exhaust hole. Open.

When the solenoid valve needs to be closed, it is energized again. Under the action of electromagnetic suction, the armature 1 drives the ejector rod 4 and the ratchet part 6 to move downward, and at the same time the ratchet part 6 rotates again to mesh with the outer wheel 5, so that the ratchet teeth 62 of the ratchet part 6 are locked. Connecting to the second connecting portion 55 makes the ratchet component 6 enter the second position state. After the solenoid valve is powered off, the electromagnetic suction disappears, the armature 1 is in a free state, the ratchet part 6 remains in the second position, the lower end of the ratchet part 6 is disengaged from the auxiliary valve core 7, and the auxiliary valve core 7 returns under the action of the spring force. Position, cut off the exhaust path of the back pressure chamber between the main valve core 9 and the outlet. As a result, the back pressure of the main spool 9 increases, and the main spool 9 is closed under the action of the spring force and the pressure of the back pressure chamber, cutting off the air supply passage, and the valve is closed.

Therefore, this embodiment adopts the ratchet structure. After the solenoid valve is energized, the armature moves to push the auxiliary valve core through the ratchet structure. After the auxiliary valve core is opened, the pressure in the back pressure chamber of the main valve core decreases, and the main valve core opens under the action of gas pressure. The valve is opened, and the ratchet structure maintains this position after power failure to realize self-locking; when the solenoid valve needs to be closed, the power is turned on again, the armature moves through the ratchet structure to push the auxiliary valve core to close, the pressure in the back pressure chamber of the main valve core rises, and the main valve core is in the gas Return under the action of pressure and spring force, the valve is closed, and the ratchet structure maintains this position after power failure, realizing self-locking.

In addition, the serial numbers of the above embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A solenoid valve, the solenoid valve includes a valve body, wherein the valve body includes: an inlet; an outlet; an air path between the inlet and the outlet; a main valve core for opening or closing the an air path; an air intake passage communicating the inlet with the back pressure chamber of the main valve core; and an exhaust passage communicating the outlet with the back pressure chamber, characterized in that, The solenoid valve also includes a ratchet part and an auxiliary spool, The ratchet member is configured to switch between a first position state and a second position state by virtue of its own rotation, wherein In the state of the first position, the ratchet part drives the auxiliary valve core to open the exhaust passage, In the second position state, the ratchet member disengages from the auxiliary spool, so that the auxiliary spool closes the exhaust passage. 2. The electromagnetic valve according to claim 1, characterized in that, the electromagnetic valve further comprises an outer wheel sleeved on the outside of the ratchet part, and the inner wall of the outer wheel is provided with a plurality of teeth that cooperate with the ratchet teeth of the ratchet part. a plurality of outer gear teeth, and the inner wall is provided with a plurality of first connecting parts and a plurality of second connecting parts, the first connecting parts and the second connecting parts are respectively used to connect two adjacent outer gear teeth, and configured alternately with each other, where the ratchet member is in the first position state when the ratchet teeth are in the first connection portion, and When the ratchet teeth are located at the second connecting portion, the ratchet component is in the second position state. 3. The solenoid valve according to claim 2, characterized in that, the solenoid valve also includes a push rod arranged in the outer wheel, a sleeve is arranged at one end of the push rod, and the wall of the sleeve The end of the ratchet part is provided with a push rod tooth that cooperates with the ratchet tooth of the ratchet part, so that the push rod drives the ratchet part to rotate through linear motion. 4. The solenoid valve according to claim 3, characterized in that, the solenoid valve further comprises an electromagnetic drive mechanism for driving the ejector rod to move linearly. 5 . The solenoid valve according to claim 3 , wherein the outer wall of the ejector rod is provided with a plurality of limit blocks for preventing the ejector rod from rotating. 6 . 6. The electromagnetic valve according to claim 4, wherein the electromagnetic driving mechanism comprises an armature and an electromagnet, and the armature is configured to drive the top under the action of electromagnetic attraction when the electromagnetic valve is energized. rod and the ratchet part. 7. The solenoid valve according to claim 1, characterized in that, the valve body gas path of the solenoid valve is a pilot-operated structure. 8. The solenoid valve according to claim 1, further comprising an electrical socket configured to connect the solenoid valve to an external power source. 9 . The solenoid valve according to claim 1 , wherein a top shaft is provided at an end of the ratchet member, abutting against the auxiliary valve core. 10 . 10. The electromagnetic valve according to claim 1, characterized in that, the auxiliary spool is arranged on the back of the main spool, and a device with the The secondary spool abuts against the main spool spring.