CN201909036U - Anti-freezing valve with function of temperature control - Google Patents

Abstract

The utility model relates to a temperature control valve, in particular to an antifreeze valve with a temperature control function. The antifreeze valve with temperature control function includes a valve pipe joint, a valve body and a valve lower cover, one end of the valve pipe joint and the valve body is threaded, and the valve lower cover is threaded with the other end of the valve body; the valve body has a valve inner cavity , the inner cavity of the valve is provided with a temperature sensor and a valve seat; the end of the temperature sensor close to the valve pipe joint is equipped with a temperature-sensitive material, the end of the temperature sensor close to the lower cover of the valve is connected to the valve stem, and the valve stem is connected to the valve core. The spool is connected with a gasket; the valve seat and the lower cover are threaded. The antifreeze valve with temperature control function of the utility model improves the working mode of the valve opening spring, and the valve opening spring is designed and installed in the valve seat, and the valve core is driven to open the valve by driving the valve stem, which maximizes the sealing capacity of the valve core The diameter of the pad makes it possible to increase the diameter of the water inlet to avoid the problem of freezing.

Description

An antifreeze valve with temperature control function

technical field

The utility model relates to a temperature control valve, in particular to an antifreeze valve with a temperature control function.

Background technique

Self-operated antifreeze valve is a valve used for antifreeze in hydraulic systems, pipelines, containers and other water delivery and storage systems. It is widely used in industrial and agricultural production and people's daily life, such as: solar water heater water storage and water delivery systems. , urban and rural water supply systems, sanitation systems, fire water supply systems, water supply systems for ports, railways, etc., public engineering systems for petroleum, chemical, smelting, etc., antifreeze for pipelines, water tanks, and equipment for special vehicles such as trains, firefighting, and sprinklers.

One of the important methods for antifreezing of hydraulic systems, pipelines, containers, etc. for water delivery and storage systems is to install valves in the system and open the valves to let low-temperature water flow out when the temperature drops to achieve the purpose of antifreezing. Existing self-operated antifreeze valves use temperature sensing elements such as temperature bulbs and memory metals to generate mechanical displacements at a set temperature to control the sealing elements to open and close the valve. Generally, this type of antifreeze valve includes: water inlet, water outlet, sealing assembly, valve body, temperature sensing element (temperature bulb, memory metal, etc.), valve stem, and opening and closing with the temperature sensing element. Valve bias springs, etc. In this kind of anti-freeze valve, the valve opening spring placed on the same side as the sealing component surrounds between the outer side of the sealing component and the inner cavity of the valve, and after being compressed between the valve port and the valve stem, a force is formed to drive the seal to open the valve In this way, when the diameter of the inner cavity of the valve is constant, the diameter of the sealing gasket of the sealing component is limited, thereby limiting the diameter of the water inlet of the valve, and finally limiting the medium flow of the entire antifreeze valve, so that the antifreeze valve cannot discharge enough in an extremely harsh environment. The low temperature water makes the antifreeze valve prone to frost resistance. In addition, the water inlet of the antifreeze valve is at the same end as the sealing assembly, and the positioning spring of the temperature sensor at the water outlet must overcome the sum of the pressure of the valve opening spring at the sealing end and the pressure of the medium (water) to completely close the antifreeze valve. This structure has two disadvantages: first: the maximum working pressure of the antifreeze valve is limited by the pressure of the positioning spring of the temperature sensor: the maximum working pressure of the antifreeze valve <= pressure of the positioning spring of the temperature sensor - pressure of the valve opening spring. Second: When the temperature is high and the antifreeze valve is closed, the temperature sensor bears a large load force: temperature sensor load force = temperature sensor positioning spring pressure = valve opening spring pressure + medium (water) pressure. Under higher load forces, the service life of the temperature sensor is significantly reduced. In addition, the water outlet of the antifreeze valve has no interface or faucet for diversion, and the water flowing out of the antifreeze valve may flow freely, which brings inconvenience to the use of the antifreeze valve.

Utility model content

The invention provides an antifreeze valve with temperature control function aiming at the disadvantages of the existing antifreeze valve, such as small water inlet diameter, insufficient flow rate and easy frost resistance.

The technical scheme of the utility model for solving the above-mentioned technical problems is as follows: an antifreeze valve with temperature control function includes a valve pipe joint, a valve body and a valve lower cover, the valve pipe joint and one end of the valve body are threadedly connected, and the valve lower The cover and the other end of the valve body are threaded; the valve body has a valve inner cavity, and a temperature sensor and a valve seat are arranged in the valve inner cavity; the end of the temperature sensor close to the valve pipe joint is equipped with a temperature-sensitive material , the end of the temperature sensor close to the valve lower cover is connected with a valve stem, the valve stem is connected with a valve core, and the valve core is connected with a sealing gasket; the valve seat is threadedly connected with the valve lower cover, and the The valve stem is pierced with a valve opening spring, and the valve stem pierced with the valve opening spring is pierced through the bottom of the valve seat, and the valve opening spring is located inside the valve seat; the inner wall of the valve cavity has a ring Shaped positioning structure, the positioning structure is provided with a retaining ring, and a positioning spring is provided between the valve pipe joint and the retaining ring.

The beneficial effects of the utility model are: the antifreeze valve with temperature control function of the utility model improves the working mode of the valve opening spring, and the valve opening spring is designed and installed in the valve seat, and the valve core is driven to open the valve by driving the valve rod, and the valve can be opened to the maximum extent. The diameter of the valve core and the gasket is greatly increased, so it is possible to increase the diameter of the water inlet, thereby avoiding the problem of freezing resistance.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, an annular protruding structure is connected to the inner ring at the end of the retaining ring close to the temperature sensor.

Further, the retaining ring has a plurality of water holes.

The annular protruding structure can create a sufficient gap between the temperature sensor and the water hole of the retaining ring, effectively increase the water flow, and eliminate the flow bottleneck of the valve.

Further, the bottom of the valve seat has a plurality of water holes.

The water hole on the valve seat can eliminate the flow bottleneck inside the valve.

Further, the valve pipe joint is sealed and connected with one end of the valve body through an O-ring.

Further, the lower valve cover is sealed and connected with the other end of the valve body through an O-ring.

Further, an annular protruding structure is provided between the lower valve cover and the gasket.

The annular protrusion structure is beneficial to form an effective sealing structure.

Further, the valve lower cover has a drainage port.

The drainage structure may be an external threaded interface, an internal threaded interface or a faucet.

Description of drawings

Fig. 1 is a structural schematic diagram of the antifreeze valve with temperature control function of the present invention.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

Fig. 1 is a structural schematic diagram of the antifreeze valve with temperature control function of the present invention. As shown in Figure 1, the antifreeze valve 18 with temperature control function includes a valve pipe joint 1, a valve body 5 and a valve lower cover 11, and one end of the valve pipe joint 1 and the valve body 5 is threaded, and the valve lower The cover 11 is threadedly connected to the other end of the valve body 5; the valve body 5 has a valve cavity 4, and the valve cavity 4 is provided with a temperature sensor 6 and a valve seat 10; the temperature sensor 6 is close to the valve One end of the pipe joint 1 is equipped with a temperature-sensitive material 7, and the end of the temperature sensor 6 close to the valve lower cover 11 is connected with a valve stem 3, and the valve stem is connected with a valve core 9, and the valve seat 10 and the valve lower cover 11 are threaded, the valve stem 3 is pierced with a valve opening spring 12, and the valve stem 3 pierced with the valve opening spring 12 is pierced through the bottom of the valve seat 10; the inner wall of the valve cavity 4 There is a ring-shaped positioning structure 20 on the top, and a retaining ring 13 is provided on the positioning structure 20 , and a positioning spring 19 is provided between the valve pipe joint 1 and the retaining ring 13 . The positioning spring 19 cooperates with the ring-shaped positioning structure 20 to complete the positioning of the temperature sensor 6 in the inner cavity 4 of the valve when the valve is opened. There is enough space between the valve seat 10, the valve opening spring 12 and the valve stem 3 to increase the water flow.

An annular protruding structure is connected to the inner ring of the retaining ring 13 near the end of the temperature sensor 6 . The retaining ring 13 has a plurality of water holes 16 . The bottom of the valve seat 10 has a plurality of water holes 15 . One end of the valve pipe joint 1 and the valve body 5 is sealed and connected through an O-ring 2 . The valve lower cover 11 and the other end of the valve body 5 are sealed and connected through an O-ring 14 . An annular protruding structure 17 is provided between the valve lower cover 11 and the sealing gasket 8 , and the annular protruding structure 17 is conducive to effectively forming a line seal with the sealing gasket 8 . The valve lower cover 11 has a drainage port, which is convenient for guiding and disposing of the discharged medium (water).

When the temperature sensor 6 of the utility model senses that the temperature of the medium (water) is higher than the set temperature, it drives the valve rod 3 at the front end of the temperature sensor and links the valve core 9 and the sealing gasket 8 to move forward to contact with the lower valve cover 11 to form a seal. Close the valve; when the temperature sensor 6 senses that the temperature of the medium (water) is lower than the set temperature, the structure of the temperature-sensing material shrinks. Under the action of the valve opening spring 12, the valve stem 3 is pushed back to the front end of the temperature sensor 6 and the linkage valve core 9 and the seal 8 move backward away from the valve lower cover 11 to open the valve, so that the medium (water) in the valve cavity The valve is discharged under a certain pressure.

The positioning spring is located between the valve pipe joint and the retaining ring. When the pressure of the medium (water) is high, the positioning spring with a small pressure can be used to keep the antifreeze valve in a closed state, which makes the pressure of the positioning spring in a When the antifreeze valve with temperature control function is closed, the correlation with the pressure of the medium (water) is greatly reduced, which reduces the sensitivity of the maximum working pressure of the antifreeze valve with temperature control function to the pressure of the medium (water) in the pipeline, making the The medium pressure that the antifreeze valve with control function can withstand is greatly increased during work, and at the same time, the load force that the temperature sensor needs to bear is also reduced, which significantly improves the service life of the temperature sensor.

The water inlet and outlet of this valve can also be used interchangeably. At this time, the temperature sensor 6 mainly opens the valve according to the ambient temperature, so as to meet the special requirements of some systems for antifreezing. At this time, the maximum working pressure of the antifreeze valve will decrease, which depends on the pressure difference between the positioning spring and the valve opening spring. Utilizing the characteristic that the opening and closing state of the valve is related to the pressure of the valve positioning spring, the joint control of temperature and pressure can also be realized in the same valve. to meet the special needs of certain applications.

When the valve lower cover 11 is connected to pipelines, containers and other water delivery and storage systems as the water inlet, before the valve 17 is opened, the temperature sensor 6 senses the temperature not the temperature of the medium (water), but the sensed temperature is closer to the ambient temperature. When the temperature sensor 6 senses that the temperature is lower than the set temperature, the valve will be opened, and the medium (water) will flow into the valve cavity 4 at this time. In the cold season, the ambient temperature is usually lower than the temperature of the medium (water) in the water transmission and storage system. The medium (water) flows into the inner cavity 4 of the valve. When the temperature sensor 6 senses that the temperature of the medium (water) is higher than the set temperature, it drives the valve stem 3 at the front end of the temperature sensor and links the valve core 9 and the gasket 8 to move forward and The lower valve cover 11 contacts to form a seal to close the valve.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. antifreezing valve with function of temperature control, it is characterized in that, described antifreezing valve with function of temperature control comprises valve tube joint, valve body and valve lower cover, and the threaded one end of described valve tube joint and valve body is connected, and the other end of described valve lower cover and valve body is threaded; Have valve cavity in the described valve body, be provided with temp-sensitive apparatus and valve seat in the described valve cavity; Described temp-sensitive apparatus is equipped with temperature sensing material near an end of valve tube joint, and described temp-sensitive apparatus is connected with valve rod near an end of valve lower cover, and described valve rod is connected with spool, and described spool is connected with sealing gasket; Be threaded between described valve seat and the valve lower cover, be equipped with the valve opening spring on the described valve rod, the described valve rod that is equipped with the valve opening spring wore the bottom of valve seat, and described valve opening spring is positioned at the inside of valve seat; The position structure that has ring-type on the inwall of described valve cavity, described position structure is provided with back-up ring, is provided with retaining spring between described valve tube joint and the back-up ring.

2. the antifreezing valve with function of temperature control according to claim 1 is characterized in that, is connected with the annular projection structure on the inner ring of described back-up ring near an end of temp-sensitive apparatus.

3. the antifreezing valve with function of temperature control according to claim 1 is characterized in that, has a plurality of water ports on the described back-up ring.

4. the antifreezing valve with function of temperature control according to claim 1 is characterized in that the bottom of described valve seat has a plurality of water ports.

5. the antifreezing valve with function of temperature control according to claim 1 is characterized in that, an end of described valve tube joint and valve body links to each other by the O-ring seals sealing.

6. the antifreezing valve with function of temperature control according to claim 1 is characterized in that, the other end of described valve lower cover and valve body links to each other by the O-ring seals sealing.

7. the antifreezing valve with function of temperature control according to claim 1 is characterized in that, is provided with the annular projection structure between described valve lower cover and the sealing gasket.

8. the antifreezing valve with function of temperature control according to claim 1 is characterized in that, covers under the described valve to have drainage interface.

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