CN220102109U - Drain valve - Google Patents

Abstract

The present utility model provides a drain valve, comprising: the valve body comprises a first opening, a circulation channel and a second opening which are communicated in sequence, the circulation channel is used for fluid circulation, the first opening and the second opening are respectively positioned at two sides of the circulation channel, the first opening and the second opening are oppositely arranged, and the first opening is used for discharging fluid in the circulation channel; the first end of the valve core is arranged corresponding to the first opening, the second end of the valve core is arranged corresponding to the second opening, and the valve core can move relative to the valve body to open and close the first opening; the valve core is provided with a first limit position and a second limit position which are oppositely arranged, when the valve core is positioned at the first limit position, the first end of the valve core is used for blocking the first opening, the second end of the valve core is used for blocking the second opening, and when the valve core is positioned at the second limit position, the first end of the valve core is used for opening the first opening. By the technical scheme provided by the utility model, the problem that the valve core opening smoothness is affected by the internal and external pressure difference force of the valve body when the valve is opened in the prior art can be solved.

Description

Drain valve

Technical Field

The utility model relates to the technical field of valves, in particular to a drain valve.

Background

A drain valve is a valve for discharging fluid in a pipe, which is generally disposed between two pipes to discharge fluid in the two pipes. The drain valve comprises a valve body and a valve core, wherein the valve body comprises a flow channel and a drain outlet which are mutually communicated, the drain outlet is arranged at the side part of the flow channel, two ends of the flow channel are respectively communicated with two externally connected pipelines, and the valve core is movably arranged in the flow channel to block or open the drain outlet. In the prior art, the first end of the valve core is used for plugging or opening the water outlet, the second end of the valve core is positioned in the circulation channel, and due to the fact that the pressure in the circulation channel is larger than the pressure of the outside, when the valve core plugs the water outlet, the valve core receives larger pressure difference force, so that the valve core also needs to overcome the pressure difference force in the process of opening the valve core, and the smoothness of valve opening is affected.

Disclosure of Invention

The utility model provides a drain valve, which aims to solve the problem that the valve opening smoothness of a valve core is affected by the pressure difference between the inside and outside of a valve body when the valve core is opened in the prior art.

The present utility model provides a drain valve, comprising: the valve body comprises a first opening, a circulation channel and a second opening which are communicated in sequence, the circulation channel is used for fluid circulation, the first opening and the second opening are respectively positioned at two sides of the circulation channel, the first opening and the second opening are oppositely arranged, and the first opening is used for discharging fluid in the circulation channel; the first end of the valve core is arranged corresponding to the first opening, the second end of the valve core is arranged corresponding to the second opening, and the valve core can move relative to the valve body to open and close the first opening; the valve core is provided with a first limit position and a second limit position which are oppositely arranged, when the valve core is positioned at the first limit position, the first end of the valve core is used for blocking the first opening, the second end of the valve core is used for blocking the second opening, and when the valve core is positioned at the second limit position, the first end of the valve core is used for opening the first opening.

Further, the cross-sectional area of the first opening is S1, the cross-sectional area of the second opening is S2,

further, when the spool is in the second limit position, the second end of the spool opens the second opening.

Further, the drain valve further includes: the memory alloy spring and the return spring are arranged in the valve body, and the memory alloy spring and the return spring provide acting forces in opposite directions for the valve core so as to enable the valve core to move relative to the valve body.

Further, the reset spring and the memory alloy spring are sleeved on the valve core at intervals along the axial direction of the valve core; the first end of the memory alloy spring is abutted with the valve core, and the second end of the memory alloy spring is abutted with the inner wall of the valve body; the first end of the return spring is abutted with the inner wall of the valve body, and the second end of the return spring is abutted with the valve core.

Further, the drain valve further includes: the first axial limiting structure is arranged between the valve core and the memory alloy spring and is used for limiting the first end of the memory alloy spring to move along the direction from the second opening to the first opening relative to the valve core; the second axial limiting structure is arranged between the valve body and the memory alloy spring and is used for limiting the second end of the memory alloy spring to move along the direction from the first opening to the second opening relative to the valve body.

Further, the valve core comprises a first stop structure, the first end of the memory alloy spring is in stop fit with the first stop structure, and the first stop structure forms a first axial limit structure; the valve body is provided with a first limit groove on the inner wall, the first limit groove is located between the second opening and the circulation channel, one end of the first limit groove is communicated with the second opening, the other end of the first limit groove is communicated with the circulation channel, the cross-sectional area of the first limit groove is larger than that of the second opening, one end, far away from the reset spring, of the memory alloy spring is arranged in the first limit groove in a penetrating mode and matched with the stop of the first limit groove, and the first limit groove is formed in a second axial limit structure.

Further, the drain valve further includes: the third axial limiting structure is arranged between the valve body and the reset spring and is used for limiting the first end of the reset spring to move along the direction from the second opening to the first opening relative to the valve body; the fourth axial limiting structure is arranged between the valve core and the reset spring and is used for limiting the second end of the reset spring to move along the direction from the first opening to the second opening relative to the valve core.

Further, a second limit groove is formed in the inner wall of the valve body, the second limit groove is arranged between the first opening and the circulation channel, one end of the second limit groove is communicated with the first opening, the other end of the second limit groove is communicated with the circulation channel, the cross-sectional area of the second limit groove is larger than that of the first opening, one end, far away from the memory alloy spring, of the reset spring is arranged in the second limit groove in a penetrating mode and is matched with the second limit groove in a stop mode, and the second limit groove forms a third axial limit structure; the valve core comprises a second stop structure, one end, close to the memory alloy spring, of the reset spring is in stop fit with the second stop structure, and the second stop structure forms a fourth axial limiting structure.

Further, when the valve core is at the first limit position, the first end of the valve core is arranged in the first opening in a penetrating way and seals the first opening, and when the valve core is switched from the first limit position to the second limit position, the valve core moves along the direction from the first opening to the second opening so as to open the first opening; or, a first notch is formed in the peripheral surface of the first end of the valve core, when the valve core is in the first limit position, the first end of the valve core is arranged in the first opening in a penetrating manner and seals the first opening, and the first notch is positioned on one side, close to the circulation channel, of the first opening; when the valve core is switched from the first limit position to the second limit position, the valve core moves along the direction from the second opening to the first opening, the first notch is positioned in the first opening, a first flow channel for fluid circulation is formed between the first opening and the first notch, and the first flow channel is communicated with the circulation channel.

Further, the valve body includes: the body part is provided with a mounting port, a circulation channel and a second opening, and the mounting port is communicated with the circulation channel; the valve seat is arranged on the mounting opening and is provided with a first opening.

By applying the technical scheme of the utility model, the influence of the pressure difference between the inside and outside of the valve body on the valve opening of the valve core can be reduced, and the smoothness of the valve opening process of the valve core is ensured. Specifically, the drain valve of this scheme, first opening and second opening communicate with the circulation passageway respectively, when the first opening of first end shutoff of case, and the second opening of second end shutoff of case, the terminal surface of the first end of case and the terminal surface of the second end of case all are in same pressure environment, so set up, can reduce the axial differential pressure force of case as far as, reduce the differential pressure load of case, open first open-ended in-process at the case, reduce the differential pressure force that the case overcome, guarantee the smoothness of case removal process. In the traditional technical scheme, one end of the valve core is completely immersed in fluid in the valve body, the other end of the valve core is used for sealing the water outlet, the valve core is arranged in the pressure environment in the circulation channel, the end face of the other end of the valve core is positioned in the pressure environment outside the valve body, and the axial pressure difference force born by the valve core is large, so that the smoothness of valve core movement is greatly influenced by the pressure difference inside and outside the valve body in the valve opening process, the axial pressure difference force needing to be overcome by the valve core is large, and the smoothness of valve opening is influenced. Compared with the traditional technical scheme, the valve core is simple in structure, small in axial pressure difference force, and smoothness in the valve opening process is improved.

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 is a schematic view showing the structure of a drain valve according to a first embodiment of the present utility model;

fig. 2 is a schematic structural view showing a valve body of a drain valve according to a first embodiment of the present utility model in a first limit position;

fig. 3 is a schematic structural view showing a valve body of a drain valve according to a first embodiment of the present utility model in a second limit position;

FIG. 4 is a schematic diagram showing the cooperation of a valve core, a memory alloy spring and a return spring according to a first embodiment of the present utility model;

FIG. 5 shows a partial schematic view of the structure of FIG. 4 at A;

fig. 6 is a schematic structural view of a valve element of a drain valve according to a second embodiment of the present utility model in a first limit position;

fig. 7 is a schematic structural view of a valve element of a drain valve according to a second embodiment of the present utility model in a second limit position;

fig. 8 shows a schematic structural diagram of the valve core, the memory alloy spring and the return spring according to the second embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a valve body; 101. a first opening; 102. a flow channel; 103. a second opening; 104. a first limit groove; 105. the second limit groove;

11. a body portion; 1101. A mounting port;

111. a first boss; 112. A second protruding portion;

12. a valve seat;

20. a valve core;

201. a first stop structure; 202. a second stop structure;

203. a first notch; 204. a second notch;

21. a valve stem; 211. a stop portion;

30. a memory alloy spring;

40. and a return spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, a first embodiment of the present utility model provides a drain valve including a valve body 10 and a valve core 20. The valve body 10 includes a first opening 101, a flow channel 102 and a second opening 103 that are sequentially communicated, the flow channel 102 is used for fluid circulation, the first opening 101 and the second opening 103 are located at two sides of the flow channel 102, the first opening 101 and the second opening 103 are oppositely disposed, that is, in this scheme, the first opening 101 and the second opening 103 are distributed along a circumferential direction of the flow channel 102 at intervals, and the first opening 101 and the second opening 103 are coaxially disposed, and the first opening 101 is used for discharging fluid in the flow channel 102. The first end of the valve core 20 is arranged corresponding to the first opening 101, the second end of the valve core 20 is arranged corresponding to the second opening 103, and the valve core 20 can move relative to the valve body 10 to open and close the first opening 101; the valve core 20 has a first limit position and a second limit position which are oppositely arranged, when the valve core 20 is in the first limit position, the first end of the valve core 20 seals the first opening 101, and the second end of the valve core 20 seals the second opening 103, and when the valve core 20 is in the second limit position, the first end of the valve core 20 opens the first opening 101.

By applying the technical scheme of the utility model, the influence of the pressure difference between the inside and outside of the valve body on the valve opening of the valve core can be reduced, and the smoothness of the valve opening process of the valve core is ensured. Specifically, in the drain valve of this scheme, first opening 101 and second opening 103 communicate with circulation passageway 102 respectively, when first opening 101 is shutoff to the first end of case 20, and the second opening 103 is shutoff to the second end of case 20, the terminal surface of the first end of case 20 and the terminal surface of the second end of case 20 all are in same pressure environment, so set up, can reduce the axial differential pressure force of case 20 as far as possible, reduce the differential pressure load of case 20, in the in-process that case 20 opened first opening 101, reduce the differential pressure force that case 20 overcome, guarantee the smoothness of case 20 removal process. In the traditional technical scheme, one end of the valve core is completely immersed in fluid in the valve body, the other end of the valve core is used for sealing the water outlet, the valve core is arranged in the pressure environment in the circulation channel, the end face of the other end of the valve core is positioned in the external pressure environment of the valve body, the smoothness of valve core movement is greatly influenced by the pressure difference between the inside and the outside of the valve body, and when the pressure difference between the inside and the outside of the valve body is large, the axial pressure difference force borne by the valve core is large, so that the axial pressure difference force which needs to be overcome by the valve core is large in the valve opening process, and the smoothness of valve opening is influenced. Compared with the traditional technical scheme, the valve core 20 is simple in structure, small in axial pressure difference force, and smoothness in the valve opening process is improved.

Further, the first opening 101 has a cross-sectional area of S1, the second opening 103 has a cross-sectional area of S2,by the arrangement, the influence of the internal and external pressure difference of the valve body 10 on the valve opening of the valve core 20 can be further reduced, and the smoothness of the valve opening process of the valve core 20 is ensured. Specifically, the difference between the cross-sectional areas of the first opening 101 and the second opening 103 is within a certain range, when the first end of the valve core 20 seals the first opening 101 and the second end of the valve core 20 seals the second opening 103, the axial differential pressure forces received by the first end of the valve core 20 and the second end of the valve core 20 tend to be balanced, and almost no differential pressure load exists, that is, the differential pressure forces received by the first end of the valve core 20 and the differential pressure forces received by the second end of the valve core 20 almost cancel each other, and when the valve is opened, the valve core 20 almost does not need to overcome the differential pressure force, and only the friction force between the valve core 20 and the valve body 10 needs to be overcome, so that the smoothness of the operation of the valve core 20 is ensured. In addition, in the traditional technical scheme, the size of the water outlet is required to be designed within a certain range in consideration of the pressure difference between the inside and the outside of the valve body so as to ensure that the valve core can smoothly open the valve, otherwise, the condition that the valve core cannot open the water outlet can be caused by the overlarge pressure difference between the inside and the outside of the valve body. In the drain valve of the present embodiment, the valve core 20 does not need to consider the pressure difference between the inside and the outside of the valve body 10 when opening the first opening 101, and therefore, the size of the first opening 101 is not required to be considered, i.e., the drain valve of the present embodiment can realize large-flow discharge.

Wherein, can be set asOr->In this embodiment, s1=s2, that is, in this embodiment, the diameter of the first opening 101 is D1, the diameter of the second opening 103 is D2, and d1=d2.

When the valve core 20 is at the second limit position, the second end of the valve core 20 may open the second opening 103, or may block the second opening 103.

In this embodiment, when the inside of the flow channel 102 is in a negative pressure state, the second end of the valve core 20 opens the second opening 103 to balance the air pressure of the flow channel 102 and the outside, so as to ensure the smoothness of the drainage of the drain valve. When the flow passage 102 is in a positive pressure state, the second end of the valve spool 20 opens the second opening 103 to drain the fluid in the flow passage 102 to further increase the drainage of the drain valve.

As shown in fig. 2 and 3, further, the drain valve further includes a memory alloy spring 30 and a return spring 40. Wherein, memory alloy spring 30 and return spring 40 are both disposed within valve body 10, and memory alloy spring 30 and return spring 40 provide forces in opposite directions to valve core 20 to move valve core 20 relative to valve body 10. The drain valve of the present solution is capable of sensing the temperature of the fluid in the pipe, and opening the first opening 101 to drain the fluid in the pipe within a range in which the temperature of the fluid changes. The memory alloy spring 30 can sense the change of the temperature of the fluid in the valve body 10, when the temperature of the fluid in the valve body 10 changes, the memory alloy spring 30 can be extended or contracted, and when the memory alloy spring 30 is extended, the return spring 40 is compressed; when the memory alloy spring contracts, the return spring 40 expands. The memory alloy spring 30 and the return spring 40 cooperate to drive the movement of the valve spool 20. The memory alloy spring 30 and the reset spring 40 are arranged, the structure is simple, the service life is long, the temperature sensing speed of the memory alloy spring 30 to the fluid in the valve body 10 is high, and the valve opening and closing sensitivity of the valve core 20 is ensured. Because the cross-sectional areas of the first opening 101 and the second opening 103 are almost equal, when the valve is opened, the valve core 20 almost does not need to overcome the pressure difference force, the smoothness of the valve opening process is ensured, and then the valve core 20 can be driven to switch between the first limit position and the second limit position when the memory alloy spring 30 and the return spring 40 provide small acting force, so that the spring force of the memory alloy spring 30 and the return spring 40 can be properly reduced, the manufacturing difficulty of the memory alloy spring 30 and the return spring 40 is reduced, the wire diameters of the memory alloy spring 30 and the return spring 40 are reduced, the sensitivity of the memory alloy spring 30 is improved after the wire diameter of the memory alloy spring 30 is reduced, the response speed is higher, and the valve opening precision of the valve core 20 is improved. In addition, when the sectional areas of the first opening 101 and the second opening 103 are close, the pressure difference force to be overcome when the valve core 20 opens is not affected by the sectional areas of the first opening 101 and the second opening 103, so that the memory alloy spring 30 with the same specification can be applied to a large-opening drain valve, and the universality of the memory alloy spring 30 is improved.

In other embodiments of the present disclosure, the drain valve may include a temperature bulb and a return spring 40, where the temperature bulb and the return spring 40 are both disposed in the valve body 10, and the temperature bulb is used for sensing the temperature of the fluid in the valve body 10, and when the temperature of the fluid changes, the temperature bulb deforms and cooperates with the return spring to drive the valve core 20 to move.

In the scheme, a return spring 40 and a memory alloy spring 30 are sleeved on the valve core 20 at intervals along the axial direction of the valve core 20; the first end of the memory alloy spring 30 is abutted with the valve core 20, and the second end of the memory alloy spring 30 is abutted with the inner wall of the valve body 10; the first end of the return spring 40 abuts against the inner wall of the valve body 10, and the second end of the return spring 40 abuts against the valve body 20. By this arrangement, convenience in assembling the return spring 40 and the memory alloy spring 30 with the valve body 20 can be ensured. The specific positions of the return spring 40 and the memory alloy spring 30 are not limited in this embodiment, where the return spring 40 may be disposed near the first opening 101 or near the second opening 103, and in this embodiment, the return spring 40 is disposed near the first opening 101.

Further, the drain valve further comprises a first axial limiting structure and a second axial limiting structure. The first axial limiting structure is disposed between the valve core 20 and the memory alloy spring 30, and is used for limiting the first end of the memory alloy spring 30 to move along the direction from the second opening 103 to the first opening 101 relative to the valve core 20. A second axial limiting structure is provided between the valve body 10 and the memory alloy spring 30, the second axial limiting structure being used to limit the movement of the second end of the memory alloy spring 30 relative to the valve body 10 in the direction from the first opening 101 to the second opening 103. When the memory alloy spring 30 is assembled, the memory alloy spring 30 is sleeved on the valve core 20, so that the first end of the memory alloy spring 30 is in limit fit with the first axial limit structure, and then the valve core 20 and the memory alloy spring 30 are assembled into the valve body 10, so that the second axial limit structure limits the second end of the memory alloy spring 30. So set up, can be convenient for assemble the drain valve.

As shown in fig. 2 to 5, specifically, the valve core 20 includes a first stop structure 201, and a first end of the memory alloy spring 30 is in stop fit with the first stop structure 201, and the first stop structure 201 forms a first axial stop structure. In this embodiment, the valve core 20 includes a valve rod 21 and a stop portion 211, wherein the stop portion 211 is disposed on a peripheral surface of the valve rod 21, the stop portion 211 is located in a middle of the valve rod 21 along an axial direction of the valve rod 21, the stop portion 211 has a first stop surface and a second stop surface which are oppositely disposed, the memory alloy spring 30 is sleeved on the valve rod 21 and is located at a side of the first stop surface away from the second stop surface, and the first stop surface is in stop fit with a first end of the memory alloy spring 30.

The specific shape and number of the stopper portions 211 are not limited in this embodiment, and a plurality of stopper portions 211 may be provided at intervals along the circumferential direction of the valve stem 21. In the present embodiment, one stopper 211 is provided, and the stopper 211 is annularly provided at the outer periphery of the valve stem 21.

The specific connection mode of the stop portion 211 and the valve rod 21 is not limited in this embodiment, and may be connected by a clamping connection, a welding connection or a fastening connection. In this embodiment, the stopper 211 is integrally formed with the valve stem 21.

Specifically, a first limiting groove 104 is formed in the inner wall of the valve body 10, the first limiting groove 104 is located between the second opening 103 and the circulation channel 102, one end of the first limiting groove 104 is communicated with the second opening 103, the other end of the first limiting groove 104 is communicated with the circulation channel 102, the cross-sectional area of the first limiting groove 104 is larger than that of the second opening 103, one end, far away from the reset spring 40, of the memory alloy spring 30 is arranged in the first limiting groove 104 in a penetrating mode and is matched with the first limiting groove 104 in a blocking mode, and the first limiting groove 104 forms a second axial limiting structure. In this embodiment, the first limiting groove 104 and the second opening 103 are coaxially disposed, and the valve core 20 is disposed in the first limiting groove 104. The first limiting groove 104 is simple in structure and convenient to process.

Further, the drain valve further comprises a third axial limiting structure and a fourth axial limiting structure. Wherein, the third axial limiting structure is disposed between the valve body 10 and the return spring 40, and the third axial limiting structure is used for limiting the first end of the return spring 40 to move along the direction from the second opening 103 to the first opening 101 relative to the valve body 10. The fourth axial limiting structure is disposed between the valve core 20 and the return spring 40, and is used for limiting the second end of the return spring 40 to move along the direction from the first opening 101 to the second opening 103 relative to the valve core 20. With this arrangement, it is possible to facilitate the fitting of the assembled valve element 20, memory alloy spring 30, and return spring 40 into the valve body 10. Specifically, after the memory alloy spring 30 and the valve core 20 are assembled, the return spring 40 is sleeved on the valve core 20, so that the second end of the return spring 40 is in limit fit with the fourth axial limit structure; and then, the assembled valve core 20, the memory alloy spring 30 and the reset spring 40 are installed in the valve body 10, so that the third axial limiting structure is in limiting fit with the first end of the reset spring 40, and the second axial limiting structure limits the second end of the memory alloy spring 30.

Valve element 20 includes a second stop structure 202, and an end of return spring 40 adjacent to memory alloy spring 30 is in stop fit with second stop structure 202, second stop structure 202 forming a fourth axial stop structure. In this embodiment, the second stop surface of the stop portion 211 forms a second stop structure 202, and the return spring 40 is sleeved on the valve rod 21 and is located at a side of the second stop surface away from the first stop surface. By this arrangement, the axial dimension of the valve element 20 can be reduced as much as possible, and miniaturization of the drain valve can be ensured. In addition, the above arrangement can facilitate the processing and molding of the valve element 20.

The specific position of the stop portion 211 on the valve rod 21 is not limited in this embodiment, and may be set according to an actual working condition.

Specifically, a second limiting groove 105 is formed in the inner wall of the valve body 10, the second limiting groove 105 is arranged between the first opening 101 and the circulation channel 102, one end of the second limiting groove 105 is communicated with the first opening 101, the other end of the second limiting groove 105 is communicated with the circulation channel 102, the cross-sectional area of the second limiting groove 105 is larger than that of the first opening 101, one end, far away from the memory alloy spring 30, of the reset spring 40 is arranged in the second limiting groove 105 in a penetrating mode and is matched with the second limiting groove 105 in a blocking mode, and the second limiting groove 105 forms a third axial limiting structure. In this embodiment, the second limiting groove 105 is disposed coaxially with the first opening 101, and the valve core 20 is disposed in the second limiting groove 105. The second limiting groove 105 is simple in structure and convenient to process.

In this embodiment, the depths of the first limiting groove 104 and the second limiting groove 105 are not limited, in this embodiment, the depth of the second limiting groove 105 is greater than the depth of the first limiting groove 104, and at least half of the length of the memory alloy spring 30 is located in the flow channel 102. By the arrangement, the memory alloy spring 30 with enough length can be located in the circulation channel 102, the sensing speed of the memory alloy spring 30 to the fluid temperature is guaranteed, the sensitivity of the memory alloy spring 30 is guaranteed, and the driving precision of the valve core 20 is guaranteed.

In the present embodiment, when the valve element 20 is in the first limit position, the first end of the valve element 20 is inserted into the first opening 101 and closes the first opening 101, and when the valve element 20 is switched from the first limit position to the second limit position, the valve element 20 moves in the direction from the first opening 101 to the second opening 103 to open the first opening 101. Specifically, the memory alloy spring 30 with expansion and contraction is adopted, the valve opening water temperature is set to be 0-3 ℃, when the water temperature is reduced to the temperature range, the memory alloy spring 30 is contracted, the spring force of the return spring 40 is larger than that of the memory alloy spring 30, and the valve core 20 moves along the direction from the first opening 101 to the second opening 103, so that the valve opening is realized. When the water temperature is higher than 3-5 ℃, the memory alloy spring 30 stretches, the spring force of the memory alloy spring 30 is larger than that of the return spring 40, and the valve core 20 moves along the direction from the second opening 103 to the first opening 101, so that the valve is closed.

Further, a second notch 204 is arranged on the peripheral surface of the second end of the valve core 20, when the valve core 20 is at the first limit position, the second end of the valve core 20 is penetrated in the second opening 103 and seals the second opening 103, and the second notch 204 is positioned in the first limit groove 104; when the valve core 20 is switched from the first limit position to the second limit position, at least part of the second notch 204 is located in the second opening 103, a second flow channel for fluid to flow is formed between the second opening 103 and the second notch 204, and the second flow channel is communicated with the flow channel 102 through the first limit groove 104 so as to discharge the fluid in the flow channel 102.

The specific form and shape of the second notch 204 are not limited in this embodiment, and a plurality of second notches 204 may be disposed at intervals along the circumferential direction of the valve core 20. In this embodiment, one second notch 204 is provided, and the second notch 204 is annularly disposed on the peripheral surface of the valve core 20 along the circumferential direction of the valve core 20, both ends of the second opening 103 are provided with chamfers, and the distance between two opposite sidewalls of the second notch 204 is gradually increased along the direction from the center to the edge along the axial direction, so that the second notch 204 is matched with the second opening 103, and thus, the arrangement can facilitate the circulation of fluid.

Specifically, the valve body 10 includes a body portion 11 and a valve seat 12. The body 11 has a mounting port 1101, a flow passage 102, and a second opening 103, and the mounting port 1101 communicates with the flow passage 102. The valve seat 12 is provided separately from the body portion 11, the valve seat 12 is provided at the mounting port 1101, and the valve seat 12 has a first opening 101. In this embodiment, the valve seat 12 is screwed to the mounting port 1101, and thus, the body 11 and the valve seat 12 can be easily assembled.

Specifically, the body portion 11 includes a first convex portion 111 and a second convex portion 112; the first protruding portion 111 and the second protruding portion 112 are distributed at intervals along the circumferential direction of the body portion 11, the extending direction of the first protruding portion 111 is the same as the radial direction of the body portion 11, and the first protruding portion 111 and the second protruding portion 112 are coaxially disposed. The mounting opening 1101 is provided on the first boss 111, and the second opening 103 is provided on the second boss 112. By this arrangement, the radial dimension of the valve body 10 can be reduced.

As shown in fig. 6 to 8, a second embodiment of the present utility model provides a drain valve, which is different from the first embodiment in that:

the second notch 204 is not arranged on the peripheral surface of the second end of the valve core 20, the first notch 203 is arranged on the peripheral surface of the first end of the valve core 20, when the valve core 20 is in the first limit position, the first end of the valve core 20 is penetrated in the first opening 101 and seals the first opening 101, at least part of the first notch 203 is positioned on one side of the first opening 101 close to the circulation channel 102, and the second end of the valve core 20 is penetrated in the second opening 103; when the valve core 20 is switched from the first limit position to the second limit position, the valve core 20 moves along the direction from the second opening 103 to the first opening 101, the first notch 203 is located in the first opening 101, a first flow channel for fluid to circulate is formed between the first opening 101 and the first notch 203, the first flow channel is communicated with the circulation channel 102 through the second limit groove 105, the second end of the valve core 20 is separated from the second opening 103, and the second opening 103 is communicated with the circulation channel 102 through the first limit groove 104. Specifically, a memory alloy spring which is thermally shrunk and thermally expanded is adopted, the valve opening water temperature is set to be 0-3 ℃, when the water temperature is reduced to the temperature range, the memory alloy spring 30 is stretched, the spring force of the return spring 40 is smaller than that of the memory alloy spring 30, and the valve core 20 moves along the direction from the second opening 103 to the first opening 101, so that the valve opening is realized. When the water temperature is higher than 3-5 ℃, the memory alloy spring 30 contracts, the spring force of the memory alloy spring 30 is smaller than that of the return spring 40, and the valve core 20 moves along the direction from the first opening 101 to the second opening 103, so that the valve is closed.

The specific form and shape of the first notch 203 are not limited in this embodiment, and a plurality of first notches 203 may be disposed at intervals along the circumferential direction of the valve core 20. In this embodiment, one first notch 203 is disposed, and the first notch 203 is disposed on the peripheral surface of the valve core 20 along the circumferential direction of the valve core 20, both ends of the first opening 101 are both provided with chamfers, and the distance between two opposite sidewalls of the first notch 203 is gradually increased along the direction from the center to the edge along the axial direction, so that the first notch 203 is matched with the first opening 101, and thus, the arrangement is convenient for fluid circulation.

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 exemplary embodiments according to the present utility model. 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.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

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. A drain valve, comprising:

the valve body (10) comprises a first opening (101), a circulation channel (102) and a second opening (103) which are sequentially communicated, wherein the circulation channel (102) is used for fluid circulation, the first opening (101) and the second opening (103) are respectively positioned at two sides of the circulation channel (102), the first opening (101) and the second opening (103) are oppositely arranged, and the first opening (101) is used for discharging fluid in the circulation channel (102);

a valve core (20), wherein a first end of the valve core (20) is arranged corresponding to the first opening (101), a second end of the valve core (20) is arranged corresponding to the second opening (103), and the valve core (20) can move relative to the valve body (10) to open and close the first opening (101);

the valve core (20) is provided with a first limit position and a second limit position which are oppositely arranged, when the valve core (20) is positioned at the first limit position, a first end of the valve core (20) is used for sealing the first opening (101), a second end of the valve core (20) is used for sealing the second opening (103), and when the valve core (20) is positioned at the second limit position, the first end of the valve core (20) is used for opening the first opening (101).

2. The drain valve according to claim 1, wherein the first opening (101) has a cross-sectional area S1, the second opening (103) has a cross-sectional area S2,

3. the drain valve according to claim 1, wherein the second end of the valve element (20) opens the second opening (103) when the valve element (20) is in the second limit position.

4. The drain valve of claim 1, further comprising:

and the memory alloy spring (30) and the return spring (40) are arranged in the valve body (10), and the memory alloy spring (30) and the return spring (40) provide acting forces in opposite directions for the valve core (20).

5. The drain valve according to claim 4, wherein the return spring (40) and the memory alloy spring (30) are spaced apart from each other along the axial direction of the valve body (20) and are fitted over the valve body (20);

a first end of the memory alloy spring (30) is abutted with the valve core (20), and a second end of the memory alloy spring (30) is abutted with the inner wall of the valve body (10);

a first end of the return spring (40) is abutted against the inner wall of the valve body (10), and a second end of the return spring (40) is abutted against the valve core (20).

6. The drain valve of claim 5, further comprising:

the first axial limiting structure is arranged between the valve core (20) and the memory alloy spring (30) and is used for limiting the first end of the memory alloy spring (30) to move relative to the valve core (20) along the direction from the second opening (103) to the first opening (101);

the second axial limiting structure is arranged between the valve body (10) and the memory alloy spring (30), and is used for limiting the second end of the memory alloy spring (30) to move relative to the valve body (10) along the direction from the first opening (101) to the second opening (103).

7. The drain valve as defined in claim 6, wherein,

the valve core (20) comprises a first stop structure (201), the first end of the memory alloy spring (30) is in stop fit with the first stop structure (201), and the first stop structure (201) forms the first axial limit structure;

be provided with first spacing groove (104) on the inner wall of valve body (10), first spacing groove (104) are located between second opening (103) and circulation passageway (102), the one end of first spacing groove (104) with second opening (103) intercommunication, the other end of first spacing groove (104) with circulation passageway (102) intercommunication, the cross-sectional area of first spacing groove (104) is greater than the cross-sectional area of second opening (103), the one end of keeping away from of memory alloy spring (30) is worn to establish in first spacing groove (104) and with first spacing groove (104) backstop cooperation, first spacing groove (104) form second axial limit structure.

8. The drain valve of claim 5, further comprising:

a third axial limiting structure, which is arranged between the valve body (10) and the return spring (40), and is used for limiting the first end of the return spring (40) to move relative to the valve body (10) along the direction from the second opening (103) to the first opening (101);

the fourth axial limiting structure is arranged between the valve core (20) and the return spring (40), and is used for limiting the second end of the return spring (40) to move relative to the valve core (20) along the direction from the first opening (101) to the second opening (103).

9. The drain valve as defined in claim 8, wherein,

a second limit groove (105) is formed in the inner wall of the valve body (10), the second limit groove (105) is arranged between the first opening (101) and the circulation channel (102), one end of the second limit groove (105) is communicated with the first opening (101), the other end of the second limit groove (105) is communicated with the circulation channel (102), the cross-sectional area of the second limit groove (105) is larger than that of the first opening (101), one end, far away from the memory alloy spring (30), of the return spring (40) is arranged in the second limit groove (105) in a penetrating mode and is matched with the second limit groove (105) in a stop mode, and the second limit groove (105) forms the third axial limit structure;

the valve core (20) comprises a second stop structure (202), one end, close to the memory alloy spring (30), of the return spring (40) is in stop fit with the second stop structure (202), and the second stop structure (202) forms the fourth axial limiting structure.

10. The drain valve according to claim 1, wherein,

when the valve core (20) is in the first limit position, a first end of the valve core (20) is arranged in the first opening (101) in a penetrating way and seals the first opening (101), and when the valve core (20) is switched from the first limit position to the second limit position, the valve core (20) moves along the direction from the first opening (101) to the second opening (103) so as to open the first opening (101); or,

a first notch (203) is arranged on the peripheral surface of the first end of the valve core (20), when the valve core (20) is positioned at the first limit position, the first end of the valve core (20) is penetrated in the first opening (101) and seals the first opening (101), and the first notch (203) is positioned at one side of the first opening (101) close to the circulation channel (102); when the valve core (20) is switched from the first limit position to the second limit position, the valve core (20) moves along the direction from the second opening (103) to the first opening (101), at least part of the first notch (203) is positioned in the first opening (101), a first flow channel for fluid circulation is formed between the first opening (101) and the first notch (203), and the first flow channel is communicated with the circulation channel (102).

11. Drain valve according to claim 1, characterized in that the valve body (10) comprises:

a body portion (11) having a mounting port (1101), the flow passage (102), and the second opening (103), the mounting port (1101) communicating with the flow passage (102);

a valve seat (12) is separately arranged with the body part (11), the valve seat (12) is arranged at the mounting opening (1101), and the valve seat (12) is provided with the first opening (101).