CN219345677U - Freeze-proof valve - Google Patents

Abstract

The utility model provides an anti-freezing valve. The freeze valve includes: the valve seat assembly is provided with a liquid passing part, an installation cavity and a liquid discharging part; the piston is used for closing or opening the liquid discharge part and is provided with a liquid passing hole, and the flow passing area of the liquid passing hole is smaller than that of the liquid discharge part; the valve core assembly comprises a valve core and a first elastic structure, and the valve core is movably arranged in the piston so as to close or open the liquid through hole; the bulb, the bulb ejector pin of the bulb stretches into the valve core; a second elastic structure for applying an elastic force to the piston, the elastic force moving toward a side away from the liquid discharge portion, and an elastic force to the piston, the elastic force moving toward the liquid discharge portion; when the temperature of the medium around the temperature sensing part of the temperature bulb is smaller than a preset temperature value, the first elastic structure drives the valve core to move so as to open the liquid passing hole, and the second elastic structure and the medium in the liquid passing part push the piston to move towards one side far away from the liquid discharging part so as to open the liquid discharging part. The utility model solves the problem of poor reliability of opening and closing actions of the bulb of the anti-freezing valve on the valve port in the prior art.

Description

Freeze-proof valve

Technical Field

The utility model relates to the technical field of anti-freezing valves, in particular to an anti-freezing valve.

Background

At present, a temperature bulb is arranged in a valve seat of the anti-freezing valve, the water temperature is sensed through the temperature bulb to control the on-off state of the valve, so that the valve can be ensured to be opened in time to discharge water in a pipeline when the water temperature is reduced to a preset temperature, and the phenomenon that the pipeline bursts due to freezing of the water in the pipeline is avoided.

However, in the prior art, the valve core is driven to move through the telescopic movement of the bulb ejector rod so as to directly open the valve port for drainage, and the size of the valve port which can be opened is limited due to the limited ejection force of the bulb ejector rod, so that not only can the large valve port be opened and closed, but also the phenomenon that the valve can not be opened or closed exists, the drainage reliability of the anti-freezing valve is influenced, and even the normal operation of the anti-freezing valve is influenced.

Disclosure of Invention

The utility model mainly aims to provide an anti-freezing valve, which solves the problem that a temperature bulb of the anti-freezing valve in the prior art has poor reliability in opening and closing actions of a valve port.

In order to achieve the above object, the present utility model provides an anti-freeze valve comprising: the valve seat assembly is provided with a liquid passing part, a mounting cavity and a liquid discharging part, and the mounting cavity is communicated with the liquid passing part; the piston is movably arranged in the mounting cavity so as to close or open the liquid discharge part, the piston is provided with a liquid passing hole communicated with the liquid discharge part, and the flow passing area of the liquid passing hole is smaller than that of the liquid discharge part; the valve core assembly comprises a valve core and a first elastic structure, the valve core is movably arranged in the piston to close or open the liquid passing hole, and the first elastic structure is used for applying elastic force to the valve core, which moves towards the side far away from the liquid passing hole, and applying elastic force to the piston, which moves towards the liquid discharging part; the temperature bulb is connected to the valve seat assembly and comprises a temperature sensing part and a temperature bulb ejector rod, and the temperature bulb ejector rod stretches into the valve core to push the valve core to move towards the liquid passing hole; a second elastic structure for applying an elastic force to the piston, the elastic force moving toward a side away from the liquid discharge portion; when the temperature of the medium around the temperature sensing part is smaller than a preset temperature value, the first elastic structure drives the valve core to move so as to open the liquid passing hole, and the second elastic structure and the medium in the liquid passing part push the piston to move towards one side far away from the liquid discharging part so as to open the liquid discharging part.

By applying the technical scheme of the utility model, the piston is movably arranged in the mounting cavity so as to block or open the liquid discharge part, the piston is provided with the liquid passing hole, and the flow passing area of the liquid passing hole is smaller than that of the liquid discharge part and is communicated with the liquid discharge part. The valve core is movably arranged in the piston to close or open the liquid through hole. Thus, in normal working conditions, liquid can flow in the liquid passing portion, at the moment, the liquid passing hole and the liquid discharging portion are in a closed state, the first elastic structure and the second elastic structure are in a compressed state, and liquid in the valve seat assembly cannot flow out through the liquid discharging portion. When the temperature of the medium around the temperature sensing part is smaller than a preset temperature value, the liquid in the anti-freezing valve has the possibility of freezing, at the moment, the bulb ejector rod contracts, the first elastic structure drives the valve core to move upwards towards one side far away from the liquid passing hole under the action of the elastic force of the first elastic structure so as to open the liquid passing hole, and the second elastic structure pushes the piston to move upwards towards one side far away from the liquid discharging part under the action of the elastic force of the second elastic structure so as to open the liquid discharging part to discharge liquid.

Compared with the prior art that the valve port is opened or closed only through the bulb ejector rod, the anti-freezing valve in the application can realize the lifting motion of the piston through the elastic restoring force of the second elastic structure, and can realize the lifting motion of the piston through the pressure difference between the upper cavity and the lower cavity of the piston so as to open or close the liquid draining part, thereby solving the problem that the opening and closing reliability of the valve port by the bulb of the anti-freezing valve in the prior art is poor, and improving the liquid draining reliability of the liquid draining part and the operation reliability of the anti-freezing valve. Meanwhile, the liquid draining part with a large size can be closed or opened through the arrangement of the piston, and the universality of the frost valve is improved.

Further, the liquid passing part comprises a first liquid passing channel and a second liquid passing channel which are communicated with each other, and the mounting cavity is communicated with the first liquid passing channel; at least part of the temperature sensing part stretches into in the second liquid passage, and the valve seat assembly still includes: the second liquid passing channel is communicated with the mounting cavity through the balance channel; when the temperature of the medium around the temperature sensing part is greater than or equal to a preset temperature value, the bulb ejector rod pushes the valve core to close the liquid passing hole, and the medium in the second liquid passing channel enters the mounting cavity through the balance channel so as to push the piston to move towards the liquid discharging part and close the liquid discharging part. The temperature sensing part stretches into the second liquid passage, when the temperature in the second liquid passage is greater than or equal to a preset temperature value, liquid in the first liquid passage and the second liquid passage can normally flow, the temperature bulb ejector rod is in an extending state and pushes the valve core to move towards the liquid passage hole, and then the liquid passage hole is closed.

Further, the valve seat assembly includes: the first valve seat is provided with a first liquid passing channel and a first mounting port; the second valve seat is provided with a second liquid passing channel, and the first valve seat is connected with the second valve seat; the valve cover is at least partially arranged in the first mounting opening and is connected with the first valve seat and the second valve seat, and a mounting cavity is formed by surrounding the valve cover and the first valve seat; one end of the liquid discharge pipe extends into the first liquid passage, and the other end of the liquid discharge pipe penetrates through the first valve seat; wherein, the hole of the liquid discharge pipeline is a liquid discharge part. The valve cover is connected with the first valve seat and the second valve seat, an installation cavity is formed around the valve seat, the liquid discharge pipeline is located in the first liquid passing channel, so that the liquid discharge pipeline is closer to the circulating water, the temperature difference between the liquid discharge pipeline and the circulating water temperature is smaller in a low-temperature environment, the lower circulating water temperature is allowed, the liquid discharge pipeline is not frozen, and the lower circulating water temperature and the lower environment temperature can be supported. Simultaneously, above-mentioned setting makes the inner structure overall arrangement of disk seat subassembly more reasonable, has promoted the interior space utilization of disk seat subassembly, prevents that piston, case and bulb from influencing the normal flow of liquid in first liquid passage and the second liquid passage.

Further, the valve cover is provided with a balance channel, a first mounting hole and a second mounting hole, the balance channel and the second mounting hole are communicated with the first mounting hole, the balance channel and the second mounting hole are arranged at intervals, and a temperature bulb body of the temperature bulb is arranged in the second mounting hole in a penetrating manner; at least part of the piston is slidably arranged in the first mounting hole, and the extending direction of the first mounting hole is consistent with the sliding direction of the piston. The piston is positioned in the mounting cavity and can slide in the first mounting hole of the valve cover, so that on one hand, the internal structure layout of the valve seat assembly is more reasonable, the utilization rate of the internal space of the valve seat assembly is improved, and the normal flow of liquid in the first liquid passing channel and the second liquid passing channel is prevented from being influenced by the piston, the valve core and the temperature bulb; on the other hand, the valve seat assembly is simpler in structure and easy to process and realize, and the processing cost and the processing difficulty of the frost valve are reduced.

Further, the piston includes: the piston body is provided with an accommodating space and a liquid passing hole which are communicated with each other, and at least part of the valve core is positioned in the accommodating space; the first end of the communicating part is connected with the piston body, and the liquid passing hole is communicated with the liquid discharging part through the communicating part; the second end of the communication part is connected with the blocking part, and the blocking part is used for opening or closing the liquid draining part; the piston body is also provided with a limiting concave part, and at least part of the second elastic structure stretches into the limiting concave part and is in limiting fit with the limiting concave part. When the temperature in the second liquid passing channel is smaller than a preset temperature value, the valve core opens the liquid passing hole, the liquid passing hole is communicated with the liquid discharging pipeline through the communicating part, so that the pressure in the upper cavity of the piston is ensured to be smaller than the pressure in the lower cavity of the piston, the piston moves upwards under the combined action of the pressure difference between the upper cavity and the lower cavity of the piston and the elastic force of the second elastic structure, so that the liquid discharging pipeline is opened, and the anti-freezing valve can conduct liquid discharging action to prevent liquid from freezing in the anti-freezing valve. Meanwhile, the piston is simpler in structure and easy to process and realize due to the arrangement, and the processing cost and the processing difficulty of the piston are reduced.

Further, the liquid passing hole is a conical hole, the communicating part is provided with a straight hole, and the liquid passing hole is communicated with the liquid discharging part through the straight hole; wherein, along the direction of the taper hole to the straight hole, the aperture of the taper hole gradually decreases. The arrangement ensures that the diameter of one end of the through liquid hole, which is close to the valve core, is larger than that of the valve core, so that the valve core can conveniently enter the through liquid hole, and the closing difficulty of the anti-freezing valve is reduced; on the other hand, when the liquid passing hole is in an open state, the tapered hole can increase the flow velocity of the flowing medium, thereby increasing the liquid passing velocity of the liquid passing hole.

Further, the first valve seat includes: the liquid discharge pipeline is positioned in the first cylinder and forms a limiting space with the inner cylinder wall of the first cylinder; the second cylinder is connected with the first cylinder and the second valve seat, and the first liquid passing channel is communicated with the second liquid passing channel through the inner cavity of the second cylinder; the first pipe body is arranged on the first cylinder body and the second cylinder body in a penetrating way, and the inner cavity of the first pipe body is a first liquid passing channel; wherein, the both ends of second elastic construction are located spacing concave part and spacing space respectively. At least part of the temperature bulb stretches into the first cylinder, the first liquid passing channel and the second liquid passing channel are communicated through the second cylinder, and the first cylinder is communicated with the second cylinder through the first pipe body, so that the temperature bulb, the piston and the valve core can not influence the normal flow of medium in the liquid passing channel, and the conveying efficiency of the anti-freezing valve is improved. Meanwhile, the arrangement ensures that the liquid discharge pipeline is positioned in the first liquid passing channel, so that the liquid discharge pipeline is closer to the circulating water, the temperature difference between the liquid discharge pipeline and the circulating water temperature is smaller in a low-temperature environment, the lower circulating water temperature is allowed without freezing the liquid discharge pipeline, and the lower circulating water temperature and the lower environment temperature can be supported.

Further, the flow area of the balance channel is smaller than that of the liquid passing hole. The arrangement ensures that liquid can be smoothly discharged out of the anti-freezing valve through the liquid discharge pipeline, so that the liquid discharge efficiency of the anti-freezing valve is improved; on the other hand, liquid is prevented from accumulating in the piston to influence the opening of the liquid discharge pipeline, and the operation reliability of the anti-freezing valve is further improved.

Further, the first elastic structure is a first spring, the second elastic structure is a second spring, and the stiffness coefficient of the first spring is larger than that of the second spring. When the temperature in the liquid passing part is smaller than a preset temperature value, the arrangement ensures that the elastic force of the first spring is smaller than that of the second spring, so that the second elastic structure and the medium in the liquid passing part jointly push the piston to move towards one side far away from the liquid discharging part, and the liquid discharging part is opened. Simultaneously, the arrangement ensures that the structures of the first elastic structure and the second elastic structure are simpler, the processing and the realization are easy, and the processing cost of the frost valve is reduced

Further, the cross section of the liquid discharge pipe is circular and has a diameter of 10mm or more. The setting makes the anti-freezing valve be the big valve port anti-freezing valve to make the liquid that is located in the portion of crossing liquid discharge from flowing back portion fast, realized the quick flowing back of anti-freezing valve, promoted the flowing back efficiency of anti-freezing valve.

Further, the second valve seat includes: the inner cavity of the second pipe body is a second liquid passing channel; the third cylinder is arranged on the second pipe body and communicated with the second liquid passing channel, the third cylinder is provided with a second mounting port, at least part of the valve cover is arranged in the second mounting port, and the temperature sensing part extends into the second liquid passing channel through the second mounting port; the fourth cylinder is arranged on the second pipe body and communicated with the second liquid passing channel, and the fourth cylinder is communicated with the second cylinder; the first cylinder body and the third cylinder body are oppositely arranged and connected, and the second cylinder body and the fourth cylinder body are oppositely arranged and connected. The temperature sensing part stretches into in the third barrel, and first liquid passage passes through fourth barrel and second liquid passage intercommunication, and the third barrel passes through second body and fourth barrel intercommunication to ensure that the temperature package can not influence the normal flow of crossing the medium in the liquid passage, has promoted the conveying efficiency of anti-freezing valve. Meanwhile, the structure of the second valve seat is simpler, the second valve seat is easy to process and realize, and the processing cost of the second valve seat is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a cross-sectional view of an embodiment of a freeze valve according to the present utility model in an open valve state;

FIG. 2 shows a cross-sectional view of the freeze valve of FIG. 1 in a closed state;

fig. 3 shows a schematic perspective view of the frost valve of fig. 1;

FIG. 4 shows a side view of the freeze valve of FIG. 3;

FIG. 5 shows a cross-sectional view of the valve cover of the freeze valve of FIG. 1;

FIG. 6 shows a cross-sectional view of the spool of the freeze valve of FIG. 1;

FIG. 7 shows a cross-sectional view of the piston of the freeze valve of FIG. 1;

FIG. 8 shows a cross-sectional view of a first valve seat of the freeze valve of FIG. 1;

fig. 9 shows a cross-sectional view of a second valve seat of the freeze valve of fig. 1.

Wherein the above figures include the following reference numerals:

10. a valve seat assembly; 11. a liquid passing part; 111. a first liquid passage; 112. a second liquid passage; 12. a mounting cavity; 13. a liquid discharge part; 14. balance channel; 15. a first valve seat; 152. a first cylinder; 153. a second cylinder; 154. a first tube body; 16. a second valve seat; 161. a second tube body; 162. a third cylinder; 163. a fourth cylinder; 17. a valve cover; 171. a first mounting hole; 172. a second mounting hole; 18. a liquid discharge pipe; 20. a piston; 21. a liquid passing hole; 22. a piston body; 221. an accommodation space; 222. a limit concave part; 23. a communication section; 24. a blocking part; 30. a valve core; 31. a first bore section; 32. a second bore section; 40. a first elastic structure; 50. a temperature pack; 51. a temperature sensing unit; 52. a bulb ejector rod; 53. a bulb body; 200. and a second elastic structure.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

In order to solve the problem that the opening and closing operation reliability of a valve port of a temperature bulb of the anti-freezing valve in the prior art is poor, the application provides the anti-freezing valve.

As shown in fig. 1 to 9, the freeze valve includes a valve seat assembly 10, a piston 20, a valve core assembly, a bulb 50, and a second elastic structure 200. The valve seat assembly 10 has a liquid passing portion 11, a mounting chamber 12, and a liquid discharging portion 13, and the mounting chamber 12 communicates with the liquid passing portion 11. The piston 20 is movably disposed in the mounting chamber 12 to close or open the drain portion 13, the piston 20 has a through-hole 21 communicating with the drain portion 13, and the through-flow area of the through-hole 21 is smaller than the through-flow area of the drain portion 13. The valve cartridge assembly includes a valve cartridge 30 and a first elastic structure 40, the valve cartridge 30 being movably disposed in the piston 20 to close or open the liquid passing hole 21, the first elastic structure 40 for applying an elastic force to the valve cartridge 30 moving toward a side away from the liquid passing hole 21 and an elastic force to the piston 20 moving toward a side of the liquid drain portion 13. The temperature pack 50 is connected to the valve seat assembly 10, the temperature pack 50 comprises a temperature sensing part 51 and a temperature pack ejector rod 52, and the temperature pack ejector rod 52 stretches into the valve core 30 to push the valve core 30 to move towards the liquid through hole 21. The second elastic structure 200 is used to apply an elastic force to the piston 20 that moves toward the side away from the drain 13. When the temperature of the medium around the temperature sensing portion 51 is less than a preset temperature value, the valve core 30 is driven to move by the first elastic structure 40 to open the liquid passing hole 21, and the second elastic structure 200 and the medium in the liquid passing portion 11 jointly push the piston 20 to move towards a side far away from the liquid discharging portion 13 to open the liquid discharging portion 13.

By applying the technical scheme of the embodiment, the piston 20 is movably arranged in the mounting cavity 12 to block or open the liquid discharge part 13, the piston 20 is provided with a liquid passing hole 21, and the flow passing area of the liquid passing hole 21 is smaller than the flow passing area of the liquid discharge part 13 and is communicated with the liquid discharge part 13. A valve spool 30 is movably disposed within the piston 20 to close or open the fluid passage 21. Thus, in normal working conditions, the liquid can flow in the liquid passing portion 11, at this time, the liquid passing hole 21 and the liquid discharging portion 13 are both in a closed state, the first elastic structure 40 and the second elastic structure 200 are both in a compressed state, and the liquid in the valve seat assembly cannot flow out through the liquid discharging portion 13. When the temperature of the medium around the temperature part 51 is smaller than the preset temperature value, the liquid in the anti-freezing valve has the possibility of freezing, at this time, the bulb ejector rod 52 contracts, the first elastic structure 40 drives the valve core 30 to move upwards towards the side far away from the liquid passing hole 21 under the action of the self elastic force so as to open the liquid passing hole 21, and the second elastic structure 200 pushes the piston 20 to move upwards towards the side far away from the liquid discharging part 13 under the action of the self elastic force so as to open the liquid discharging part 13 for discharging liquid.

Compared with the prior art that the valve port is opened or closed only through the bulb ejector rod, the anti-freezing valve in the embodiment not only can realize the lifting movement of the piston 20 through the elastic restoring force of the second elastic structure 200, but also can realize the lifting movement of the piston 20 through the pressure difference between the upper cavity and the lower cavity of the piston so as to open or close the liquid discharge part 13, further the problem that the opening and closing operation reliability of the valve port by the bulb of the anti-freezing valve in the prior art is poor is solved, and the liquid discharge reliability of the liquid discharge part 13 and the operation reliability of the anti-freezing valve are improved. Meanwhile, the above-mentioned arrangement of the piston 20 can close or open the large-sized liquid discharging portion 13, thereby improving the versatility of the freeze valve.

As shown in fig. 1 and 2, the liquid passing portion 11 includes a first liquid passing passage 111 and a second liquid passing passage 112 that communicate with each other, and the installation chamber 12 communicates with the first liquid passing passage 111. At least a part of the temperature sensing unit 51 extends into the second liquid passage 112. The valve seat assembly 10 further includes a balance channel 14, and the second fluid passage 112 communicates with the mounting chamber 12 through the balance channel 14. When the temperature of the medium around the temperature sensing portion 51 is greater than or equal to a preset temperature value, the bulb ejector 52 pushes the valve core 30 to close the liquid passing hole 21, and the medium in the second liquid passing channel 112 enters the installation cavity 12 through the balance channel 14 to push the piston 20 to move towards the liquid draining portion 13 and close the liquid draining portion 13. Specifically, the temperature sensing portion 51 stretches into the second liquid passing channel 112, when the temperature in the second liquid passing channel 112 is greater than or equal to a preset temperature value, the liquid in the first liquid passing channel 111 and the second liquid passing channel 112 can normally flow, and at this time, the temperature bulb ejector 52 is in an elongated state and pushes the valve core 30 to move towards the liquid passing hole 21, so as to close the liquid passing hole 21, and since the mounting cavity 12 is communicated with the second liquid passing channel 112 through the balancing channel 14, the pressure in the upper cavity of the piston is greater than the pressure in the lower cavity of the piston, and the piston 20 moves towards the liquid discharging portion 13 under the action of the pressure difference so as to close the liquid discharging portion 13, so that the frost valve can normally pass liquid.

Optionally, the preset temperature value is 3 ℃ or higher and 5 ℃ or lower.

As shown in fig. 1 to 4, the valve seat assembly 10 includes a first valve seat 15, a second valve seat 16, a valve cover 17, and a drain pipe 18. The first valve seat 15 has a first through-liquid passage 111 and a first mounting port. The second valve seat 16 has a second through-liquid passage 112, and the first valve seat 15 is connected to the second valve seat 16. At least part of the valve cover 17 is arranged in the first mounting opening and is connected to both the first valve seat 15 and the second valve seat 16, the valve cover 17 and the first valve seat 15 surrounding the mounting cavity 12. One end of the liquid discharge pipe 18 extends into the first liquid passage 111, and the other end of the liquid discharge pipe 18 penetrates through the first valve seat 15. The inner hole of the drain pipe 18 is the drain portion 13. In this way, the valve cover 17 is connected with the first valve seat 15 and the second valve seat 16, and forms the installation cavity 12 around the first valve seat 15, and the liquid discharge pipe 18 is located in the first liquid passing channel 111, so that the liquid discharge pipe 18 is closer to the circulating water, the temperature difference between the liquid discharge pipe 18 and the circulating water is smaller in the low-temperature environment, the lower circulating water temperature is allowed without freezing the liquid discharge pipe 18, and the lower circulating water temperature and the lower environment temperature can be supported. Meanwhile, the arrangement makes the internal structural layout of the valve seat assembly 10 more reasonable, improves the utilization rate of the internal space of the valve seat assembly 10, and prevents the piston 20, the valve core 30 and the temperature bulb 50 from affecting the normal flow of the liquid in the first liquid passing channel 111 and the second liquid passing channel 112.

As shown in fig. 5, the valve cover 17 has a balancing passage 14, a first mounting hole 171 and a second mounting hole 172, wherein the balancing passage 14 and the second mounting hole 172 are both communicated with the first mounting hole 171, the balancing passage 14 and the second mounting hole 172 are arranged at intervals, and the bulb body 53 of the bulb 50 is penetrated in the second mounting hole 172; at least a portion of the piston 20 is slidably disposed within the first mounting hole 171, and an extending direction of the first mounting hole 171 coincides with a sliding direction of the piston 20. In this way, the piston 20 is located in the mounting cavity 12 and can slide in the first mounting hole 171 of the valve cover 17, so that on one hand, the internal structural layout of the valve seat assembly 10 is more reasonable, the utilization rate of the internal space of the valve seat assembly 10 is improved, and the normal flow of the liquid in the first liquid passing channel 111 and the second liquid passing channel 112 is prevented from being influenced by the piston 20, the valve core 30 and the temperature bulb 50; on the other hand, the valve seat assembly 10 is simpler in structure and easy to process and realize, and the processing cost and the processing difficulty of the frost valve are reduced.

In this embodiment, the bulb body 53 is screwed with the second mounting hole 172, so as to mount the bulb 50 on the valve cover 17, which is convenient for the assembly and disassembly of the bulb body and the valve cover 17, and prevents the bulb body 53 from moving or shaking in the valve seat assembly 10 to affect the structural stability of the anti-freezing valve. The valve core 30 is provided with a first hole section 31 and a second hole section 32 which are communicated with each other, the inner diameter of the first hole section 31 is larger than that of the second hole section 32, and a step surface is formed at the joint of the first hole section 31 and the second hole section 32 and used for limiting and stopping the bulb body 53. The end surface of the bulb ejector rod 52 far away from the bulb body 53 is used for abutting against the bottom surface of the second hole section 32 to push the valve core 30 to close the liquid passing hole 21, so that the arrangement is that on one hand, the step formed at the joint of the first hole section 31 and the second hole section 32 is used for limiting and stopping the bulb body 53 so as to limit the position of the valve core 30 and ensure that the opening degree of the liquid passing hole 21 is proper; on the other hand, the bulb ejector rod 52 can drive the valve core 30 to move by pushing the bottom surface of the second hole section 32, so as to realize the plugging function of the valve core 30.

Specifically, at least a portion of the bulb body 53 extends into the first bore section 31 to slide in the direction of extension of the first bore section 31. Like this, limit the slip direction of bulb body 53 through second hole section 32, and then restrict the direction of movement of bulb ejector pin 52, and then realized the interior location of case 30 through the cooperation between bulb ejector pin 52 and the case 30 to ensure that case 30 can move in to the through-liquid hole 21 in order to carry out the shutoff to the through-liquid hole 21, and then promoted the slip reliability of bulb body 53.

Optionally, the outer diameter of the bulb body 53 is matched with the inner diameter of the first hole section 31, and the end of the bulb ejector rod 52 away from the bulb body 53 is an expanded diameter section, and the outer diameter of the expanded diameter section is matched with the second hole section 32. Thus, the above arrangement realizes the guiding and positioning functions of the bulb ejector rod 52 and the bulb body 53 together with the valve core 30, namely, the bulb 50 is positioned with the valve core 30 at two positions, so that the movement stability of the valve core 30 is improved.

Alternatively, the first mounting hole 171 is disposed coaxially with the second mounting hole 172.

As shown in fig. 7, the piston 20 includes a piston body 22, a communication portion 23, and a blocking portion 24. The piston body 22 has a receiving space 221 and a fluid passage 21 communicating with each other, and at least a part of the valve body 30 is located in the receiving space 221. The first end of the communication portion 23 is connected to the piston body 22, and the liquid passage 21 communicates with the liquid discharge portion 13 through the communication portion 23. The second end of the communication portion 23 is connected to a blocking portion 24, and the blocking portion 24 is used to open or close the liquid discharge portion 13. The piston body 22 further has a limiting recess 222, and at least a portion of the second elastic structure 200 extends into the limiting recess 222 and is in limiting fit with the limiting recess 222. Thus, when the temperature in the second liquid passing channel 112 is less than the preset temperature value, the valve core 30 opens the liquid passing hole 21, and at this time, the liquid passing hole 21 is communicated with the liquid discharge pipe 18 through the communicating part 23, so as to ensure that the pressure in the upper cavity of the piston is less than the pressure in the lower cavity of the piston, and the piston 20 moves upwards under the combined action of the pressure difference between the upper cavity and the lower cavity of the piston and the elastic force of the second elastic structure 200, so as to open the liquid discharge pipe 18, and at this time, the anti-freezing valve can perform liquid discharge action, so that the liquid is prevented from freezing in the anti-freezing valve. Meanwhile, the structure of the piston 20 is simpler, the piston is easy to process and realize, and the processing cost and the processing difficulty of the piston 20 are reduced.

In the present embodiment, the limit recess 222 is used for limiting and stopping the second elastic structure 200, so as to ensure that the direction of the elastic force of the second elastic structure 200 is consistent with the moving direction of the valve core 30, and further, the moving direction of the valve core 30 is consistent with the moving direction of the piston 20.

Specifically, the communication portion 23 is cylindrical and both ends are respectively connected to the piston body 22 and the blocking portion 24, and the valve spool 30 is slidably provided in the piston body 22 to open or close the liquid passage hole 21.

In the present embodiment, the liquid passing hole 21 is a tapered hole, the communicating portion 23 has a straight hole, and the liquid passing hole 21 communicates with the liquid discharging portion 13 through the straight hole; wherein, along the direction of the taper hole to the straight hole, the aperture of the taper hole gradually decreases. In this way, on the one hand, the diameter of the end, close to the valve core 30, of the liquid passing hole 21 is larger than that of the valve core 30, so that the valve core 30 can conveniently enter the liquid passing hole 21, and the closing difficulty of the anti-freezing valve is reduced; on the other hand, when the liquid passing hole 21 is in an open state, the tapered hole can increase the flow velocity of the flowing medium, thereby increasing the liquid passing velocity of the liquid passing hole 21.

Optionally, the valve core 30 includes an insertion section located at an end of the valve core 30, and the fluid passage 21 is closed when at least part of the insertion section is inserted into the straight hole. The insertion section is a cylindrical structure, and the cylindrical structure extends into the straight hole to close the liquid through hole 21. When the liquid passing hole 21 is closed, the valve core 30 is not limited downwards, so that the stroke fluctuation of the bulb ejector rod 52 can not affect the plugging reliability of the valve core 30, the frost valve can be provided with the bulbs 50 with various specifications, and the processing difficulty of the frost valve is reduced.

As shown in fig. 8, the first valve seat 15 includes a first cylinder 152, a second cylinder 153, and a first pipe 154. The first barrel 152 has a first mounting opening, and the drain pipe 18 is located in the first barrel 152 and forms a limiting space with the inner barrel wall of the first barrel 152. The second cylinder 153 is connected to both the first cylinder 152 and the second valve seat 16, and the first liquid passage 111 communicates with the second liquid passage 112 through the inner cavity of the second cylinder 153. The first pipe body 154 is arranged on the first cylinder 152 and the second cylinder 153 in a penetrating way, and the inner cavity of the first pipe body 154 is the first liquid passing channel 111. Wherein, two ends of the second elastic structure 200 are respectively located in the limit concave portion 222 and the limit space. In this way, at least part of the temperature pack 50 extends into the first cylinder 152, the first liquid passing channel 111 and the second liquid passing channel 112 are communicated through the second cylinder 153, and the first cylinder 152 is communicated with the second cylinder 153 through the first pipe 154, so that the temperature pack 50, the piston 20 and the valve core 30 can not influence the normal flow of the medium in the liquid passing channel, and the conveying efficiency of the anti-freezing valve is improved. Meanwhile, the arrangement ensures that the liquid discharge pipe 18 is located in the first liquid passing channel 111, so that the liquid discharge pipe 18 is closer to the circulating water, the temperature difference between the liquid discharge pipe 18 and the circulating water is smaller in the low-temperature environment, the lower circulating water temperature is allowed, the liquid discharge pipe 18 is not frozen, and the lower circulating water temperature and the lower environment temperature can be supported.

In the present embodiment, both ends of the second elastic structure 200 are limited by the limiting recess 222 and the limiting space to limit the direction of the elastic force applied to the piston 20 by the second elastic structure 200, so as to ensure that the piston 20 can perform the lifting motion. The first cylinder 152 and the second cylinder 153 are disposed parallel to each other, and the first cylinder 152 and the first tube 154 are disposed perpendicular to each other.

Optionally, the flow area of the equalization channel 14 is smaller than the flow area of the via 21. Thus, on the one hand, the arrangement ensures that the liquid can be smoothly discharged out of the anti-freezing valve through the liquid discharge pipeline 18, so that the liquid discharge efficiency of the anti-freezing valve is improved; on the other hand, liquid is prevented from accumulating in the piston 20 to influence the opening of the liquid discharge pipe 18, and the operation reliability of the anti-freezing valve is further improved.

In this embodiment, the liquid passing hole 21 is a circular opening, the diameter of the liquid discharging pipe 18 is larger than that of the circular opening, the circulation capacity of the balance channel 14 is smaller than that of the liquid passing hole 21, and the circulation capacity of the liquid discharging pipe 18 is larger than that of the liquid passing hole 21, so that not only is the flow smoothness of liquid in the anti-freezing valve improved, but also the operation reliability of the anti-freezing valve is improved.

In this embodiment, the first elastic structure 40 is a first spring, and the second elastic structure 200 is a second spring, and the stiffness coefficient of the first spring is greater than that of the second spring. Thus, when the temperature in the liquid passing portion 11 is less than the preset temperature value, the above arrangement ensures that the elastic force of the first spring is less than the elastic force of the second spring, so that the second elastic structure 200 and the medium in the liquid passing portion 11 together push the piston 20 to move toward the side away from the liquid discharging portion 13 to open the liquid discharging portion 13. Meanwhile, the above arrangement makes the structures of the first elastic structure 40 and the second elastic structure 200 simpler, and is easy to process and implement, thereby reducing the processing cost of the anti-freezing valve.

Alternatively, the drain pipe 18 is circular in cross section and has a diameter of 10mm or more. In this way, the above arrangement makes the anti-freezing valve be a large valve port anti-freezing valve, so that the liquid in the liquid passing part 11 can be rapidly discharged from the liquid discharging part 13, rapid liquid discharge of the anti-freezing valve is realized, and the liquid discharge efficiency of the anti-freezing valve is improved.

As shown in fig. 9, the second valve seat 16 includes a second tube 161, a third cylinder 162, and a fourth cylinder 163. The inner cavity of the second pipe body 161 is a second liquid passing channel 112. The third cylinder 162 is disposed on the second pipe body 161 and communicates with the second liquid passage 112, the third cylinder 162 has a second mounting opening, at least a part of the valve cover 17 is disposed in the second mounting opening, and the temperature sensing portion 51 extends into the second liquid passage 112 through the second mounting opening. The fourth cylinder 163 is provided on the second pipe body 161 and communicates with the second liquid passing passage 112, and the fourth cylinder 163 communicates with the second cylinder 153. The first cylinder 152 is disposed opposite to and connected with the third cylinder 162, and the second cylinder 153 is disposed opposite to and connected with the fourth cylinder 163. In this way, the temperature sensing part 51 stretches into the third cylinder 162, the first liquid passing channel 111 is communicated with the second liquid passing channel 112 through the fourth cylinder 163, and the third cylinder 162 is communicated with the fourth cylinder 163 through the second pipe 161, so that the temperature bulb 50 is ensured not to influence the normal flow of the medium in the liquid passing channel, and the conveying efficiency of the anti-freezing valve is improved. Meanwhile, the structure of the second valve seat 16 is simpler, the processing and implementation are easy, and the processing cost of the second valve seat 16 is reduced.

In the present embodiment, the third cylinder 162 and the fourth cylinder 163 are disposed parallel to each other, and the third cylinder 162 and the second tube 161 are disposed perpendicular to each other.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the piston is movably arranged in the mounting cavity to seal or open the liquid discharge part, the piston is provided with a liquid passing hole, and the flow area of the liquid passing hole is smaller than that of the liquid discharge part and is communicated with the liquid discharge part. The valve core is movably arranged in the piston to close or open the liquid through hole. Thus, in normal working conditions, liquid can flow in the liquid passing portion, at the moment, the liquid passing hole and the liquid discharging portion are in a closed state, the first elastic structure and the second elastic structure are in a compressed state, and liquid in the valve seat assembly cannot flow out through the liquid discharging portion. When the temperature of the medium around the temperature sensing part is smaller than a preset temperature value, the liquid in the anti-freezing valve has the possibility of freezing, at the moment, the bulb ejector rod contracts, the first elastic structure drives the valve core to move upwards towards one side far away from the liquid passing hole under the action of the elastic force of the first elastic structure so as to open the liquid passing hole, and the second elastic structure pushes the piston to move upwards towards one side far away from the liquid discharging part under the action of the elastic force of the second elastic structure so as to open the liquid discharging part to discharge liquid.

Compared with the prior art that the valve port is opened or closed only through the bulb ejector rod, the anti-freezing valve in the application can realize the lifting motion of the piston through the elastic restoring force of the second elastic structure, and can realize the lifting motion of the piston through the pressure difference between the upper cavity of the piston and the lower cavity of the piston so as to open or close the liquid draining part, thereby solving the problem that the opening and closing operation reliability of the valve port of the bulb of the anti-freezing valve in the prior art is poor, and improving the liquid draining reliability of the liquid draining part and the operation reliability of the anti-freezing valve. Meanwhile, the liquid draining part with a large size can be closed or opened through the arrangement of the piston, and the universality of the frost valve is improved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (11)

1. An anti-freeze valve, comprising:

a valve seat assembly (10) having a liquid passing portion (11), an installation chamber (12), and a liquid discharging portion (13), wherein the installation chamber (12) is communicated with the liquid passing portion (11);

a piston (20), the piston (20) being movably arranged in the mounting cavity (12) to close or open the liquid discharge part (13), the piston (20) having a liquid passing hole (21) communicating with the liquid discharge part (13), the liquid passing hole (21) having a smaller flow area than the liquid discharge part (13);

a valve core assembly comprising a valve core (30) and a first elastic structure (40), wherein the valve core (30) is movably arranged in the piston (20) to close or open the liquid passing hole (21), and the first elastic structure (40) is used for applying an elastic force to the valve core (30) and an elastic force to the piston (20), wherein the elastic force moves towards the side far away from the liquid passing hole (21);

the temperature bulb (50) is connected to the valve seat assembly (10), the temperature bulb (50) comprises a temperature sensing part (51) and a temperature bulb ejector rod (52), and the temperature bulb ejector rod (52) stretches into the valve core (30) to push the valve core (30) to move towards the liquid passing hole (21);

a second elastic structure (200) for applying an elastic force to the piston (20) that moves toward a side away from the liquid discharge portion (13);

when the temperature of the medium around the temperature sensing part (51) is smaller than a preset temperature value, the first elastic structure (40) drives the valve core (30) to move so as to open the liquid passing hole (21), and the second elastic structure (200) and the medium positioned in the liquid passing part (11) jointly push the piston (20) to move towards one side far away from the liquid discharging part (13) so as to open the liquid discharging part (13).

2. The anti-freeze valve according to claim 1, wherein the liquid passing portion (11) comprises a first liquid passing channel (111) and a second liquid passing channel (112) which are in communication with each other, the mounting cavity (12) being in communication with the first liquid passing channel (111); at least part of the temperature sensing part (51) extends into the second liquid passing channel (112), and the valve seat assembly (10) further comprises:

a balancing channel (14), the second liquid passage (112) being in communication with the mounting cavity (12) through the balancing channel (14);

when the temperature of the medium around the temperature sensing part (51) is greater than or equal to a preset temperature value, the temperature bulb ejector rod (52) pushes the valve core (30) to close the liquid passing hole (21), and the medium in the second liquid passing channel (112) enters the mounting cavity (12) through the balance channel (14) so as to push the piston (20) to move towards the liquid discharging part (13) and close the liquid discharging part (13).

3. The freeze valve of claim 2, wherein the valve seat assembly (10) comprises:

a first valve seat (15) having the first liquid passage (111) and a first mounting port;

a second valve seat (16) having the second liquid passage (112), the first valve seat (15) being connected to the second valve seat (16);

a valve cover (17), at least part of the valve cover (17) is arranged in the first mounting opening and is connected with the first valve seat (15) and the second valve seat (16), and the valve cover (17) and the first valve seat (15) surround to form the mounting cavity (12);

a liquid discharge pipe (18), wherein one end of the liquid discharge pipe (18) extends into the first liquid passing channel (111), and the other end of the liquid discharge pipe (18) penetrates through the first valve seat (15); wherein, the inner hole of the liquid discharge pipeline (18) is the liquid discharge part (13).

4. A freeze valve according to claim 3 wherein the valve cover (17) has the balancing passage (14), a first mounting hole (171) and a second mounting hole (172), the balancing passage (14) and the second mounting hole (172) are both in communication with the first mounting hole (171), the balancing passage (14) and the second mounting hole (172) are disposed at intervals, and the bulb body (53) of the bulb (50) is disposed through the second mounting hole (172); at least part of the piston (20) is slidably arranged in the first mounting hole (171), and the extending direction of the first mounting hole (171) is consistent with the sliding direction of the piston (20).

5. A freeze valve according to claim 3 characterised in that the piston (20) comprises:

a piston body (22) having a receiving space (221) and the liquid passing hole (21) which are communicated with each other, wherein at least part of the valve core (30) is positioned in the receiving space (221);

a communication part (23), wherein a first end of the communication part (23) is connected with the piston body (22), and the liquid passing hole (21) is communicated with the liquid discharging part (13) through the communication part (23);

a blocking portion (24), a second end of the communication portion (23) is connected with the blocking portion (24), and the blocking portion (24) is used for opening or closing the liquid draining portion (13);

the piston body (22) is further provided with a limiting concave part (222), and at least part of the second elastic structure (200) stretches into the limiting concave part (222) and is in limiting fit with the limiting concave part (222).

6. The freeze valve according to claim 5, wherein the through-liquid hole (21) is a tapered hole, the communication portion (23) has a straight hole, and the through-liquid hole (21) communicates with the liquid discharge portion (13) through the straight hole; wherein, along the direction of the taper hole to the straight hole, the aperture of the taper hole gradually decreases.

7. The anti-freeze valve according to claim 5, characterized in that the first valve seat (15) comprises:

the first barrel (152) is provided with the first mounting port, and the liquid discharge pipeline (18) is positioned in the first barrel (152) and forms a limit space with the inner barrel wall of the first barrel (152);

the second cylinder (153) is connected with the first cylinder (152) and the second valve seat (16), and the first liquid passing channel (111) is communicated with the second liquid passing channel (112) through the inner cavity of the second cylinder (153);

the first pipe body (154) is arranged on the first cylinder body (152) and the second cylinder body (153) in a penetrating mode, and an inner cavity of the first pipe body (154) is the first liquid passing channel (111);

two ends of the second elastic structure (200) are respectively located in the limit concave part (222) and the limit space.

8. A freeze valve according to claim 3 characterised in that the flow area of the balancing channel (14) is smaller than the flow area of the through-going liquid aperture (21).

9. The freeze valve of claim 1, wherein the first resilient structure (40) is a first spring and the second resilient structure (200) is a second spring, the first spring having a higher rate than the second spring.

10. A freeze valve according to claim 3, characterised in that the drain pipe (18) is circular in cross section and has a diameter of 10mm or more.

11. The anti-freeze valve according to claim 7, characterized in that the second valve seat (16) comprises:

the inner cavity of the second pipe body (161) is the second liquid passing channel (112);

a third cylinder (162) disposed on the second pipe body (161) and communicated with the second liquid passing channel (112), the third cylinder (162) having a second mounting port, at least a part of the valve cover (17) being disposed in the second mounting port, the temperature sensing portion (51) extending into the second liquid passing channel (112) through the second mounting port;

a fourth cylinder (163) provided on the second pipe body (161) and communicating with the second liquid passage (112), the fourth cylinder (163) communicating with the second cylinder (153);

the first cylinder (152) is disposed opposite to and connected with the third cylinder (162), and the second cylinder (153) is disposed opposite to and connected with the fourth cylinder (163).

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