Mechanical freeze-proof valve

Abstract

The utility model relates to a mechanical freeze-proof valve, including the valve body, be equipped with the cavity in the valve body, the bottom wall of the cavity is equipped with the drain hole of the intercommunication outside, the lateral wall of the cavity is equipped with the water inlet groove, the cavity is connected with the sliding piece of sliding, one side of the sliding piece to the drain hole is equipped with the plugging column, the cavity is equipped with spring no.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a mechanical antifreeze valve. Background Technology

[0002] Gas water heaters typically have a storage tank, which is heated by ignition when the heater is in use. In colder regions like Northeast China, gas water heaters are equipped with an electronic drain valve in the drain chamber. When the temperature drops below a set value, the valve opens to drain water from the storage tank, preventing it from freezing and cracking, thus rendering the tank unusable.

[0003] However, electronic drain valves are relatively expensive, and using them in gas water heaters increases manufacturing costs. Therefore, a mechanical valve needs to be designed to replace the electronic drain valve and reduce manufacturing costs. Utility Model Content

[0004] This application provides a mechanical antifreeze valve that can automatically drain water from the water storage box in low-temperature environments.

[0005] The mechanical antifreeze valve provided in this application adopts the following technical solution: A mechanical antifreeze valve includes a valve body with a cavity inside. A drain hole communicating with the outside is formed on the bottom wall of the cavity, and a water inlet groove is formed on the side wall of the cavity. A sliding member is slidably connected within the cavity, and a sealing post is provided on the side of the sliding member facing the drain hole. A spring 1 and a spring 2 are provided within the cavity, located on two opposite side walls of the sliding member. The spring 2 is a shape memory alloy spring. The elastic forces of both spring 1 and spring 2 act on the sliding member, causing the sliding member to drive the sealing post to block the drain hole, thereby keeping the drain hole normally closed.

[0006] By adopting the above technical solution, when the external temperature is higher than a predetermined value, the elastic force of spring two is greater than that of spring one. Under the action of the elastic force of spring two, the sealing column will block the drain hole, keeping the drain hole in a normally closed state. The characteristic of shape memory alloy springs is that their elastic force decreases as the ambient temperature decreases. When the external temperature is lower than a certain value, the elastic force of spring two will be less than that of spring one. This causes spring one to push the sliding member upwards, further compressing spring two. The upward movement of the sliding member will move the sealing column away from the drain hole, preventing it from blocking the drain hole. At this point, the water in the water storage box can be discharged through the inlet and outlet, preventing the water in the water storage box from freezing and cracking due to low temperatures.

[0007] Preferably, a threaded hole is provided on the top wall of the cavity, the threaded hole connects to the outside and the cavity, a sealing block is threaded into the threaded hole, and the two ends of the second spring abut against the cap and the sliding part respectively.

[0008] By adopting the above technical solution, it is convenient to insert the sliding component, spring one, and spring two into the cavity.

[0009] Preferably, a limiting post is provided on the bottom surface of the sliding member, the sealing post is disposed on the limiting post, and the top end of the spring is sleeved on the limiting post.

[0010] By adopting the above technical solution, the deformation direction of spring one is restricted, so that the rebound force of spring one can be accurately applied to the sliding component.

[0011] Preferably, a limiting hole is provided on the side of the cap facing the drain hole, a limiting post 2 is provided on the top surface of the sliding member, the top end of the spring 2 extends into the limiting hole and abuts against the top wall of the limiting hole, and the bottom end of the spring 2 is sleeved on the limiting post 2.

[0012] By adopting the above technical solution, the deformation direction of spring 2 is restricted, so that the rebound force of spring 2 can be accurately applied to the sliding part.

[0013] Preferably, the sealing post includes a connecting post disposed on a limiting post and a rubber block sleeved on the connecting post, wherein the rubber block is deformed under pressure and seals the drainage hole.

[0014] By adopting the above technical solution, the sealing effect of the rubber block is relatively good, which can further prevent water from flowing out of the drain hole.

[0015] Preferably, an anti-detachment block is provided on the end of the connecting column away from the sliding member. The diameter of the anti-detachment block is larger than the diameter of the connecting column, and the anti-detachment block is completely located inside the rubber block.

[0016] By adopting the above technical solution, the probability of the rubber block falling off the connecting post is reduced.

[0017] Preferably, the bottom wall of the cavity is provided with a protrusion, the drainage hole is opened on the top surface of the protrusion, and the end of the rubber block away from the connecting column is deformed and wraps around the top of the protrusion.

[0018] By adopting the above technical solution, the sealing effect of the rubber block on the drainage hole is further improved.

[0019] Preferably, the sliding member seals the cavity, the sliding member is located below the drainage groove, and a rubber ring is fitted on the peripheral wall of the sliding member. The rubber ring abuts against the side wall of the cavity and is deformed under pressure.

[0020] By adopting the above technical solution, water can be prevented from flowing from the drain groove into the cavity below the sliding part at room temperature. Even if the rubber block falls off or is damaged and cannot seal the drain hole, the automatic drainage function of the antifreeze valve can still be guaranteed, adding an extra layer of protection.

[0021] Preferably, the bottom sidewall of the cavity protrudes inward to form a tubular pad, the pad being located below the sliding member and on the movement path of the sliding member, with the bottom surface of the sliding member abutting against the top surface of the pad.

[0022] By adopting the above technical solution, the final position of the sliding component of the pad is limited, and the cooperation between the pad and the sliding component can further prevent water from flowing into the cavity below the sliding component.

[0023] The main technical effects of this utility model are reflected in the following aspects: 1. This utility model utilizes the properties of shape memory alloys to achieve automatic drainage when the temperature is too low, preventing the water storage box from freezing. 2. This utility model limits the deformation direction of the two springs, thereby ensuring that the rebound force of the two springs can effectively act on the sliding part, so as to accurately control the upward and downward movement of the sliding part according to the temperature change; 3. This utility model prevents water in the water storage box from flowing into the cavity below the sliding part by allowing the sliding part and the rubber ring to cooperate at room temperature. Even if the rubber block falls off or is damaged and cannot seal the drain hole, the automatic drainage function of the antifreeze valve can still be guaranteed, adding an extra layer of protection. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the antifreeze valve of this application.

[0025] Reference numerals: 1. Valve body; 11. Cavity; 12. Drain hole; 13. Water inlet groove; 14. Threaded hole; 15. Protrusion; 16. Pad; 2. Sliding component; 21. Limiting post one; 22. Limiting post two; 23. Rubber ring; 3. Sealing post; 31. Connecting post; 32. Rubber block; 41. Spring one; 42. Spring two; 6. Sealing block; 61. Limiting hole; 7. Anti-detachment block. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0027] A mechanical antifreeze valve according to this embodiment includes a valve body 1, which has a cavity 11. A protrusion 15, cylindrical in shape, is provided on the bottom wall of the cavity 11. A drain hole 12, communicating with the outside, is opened on the top wall of the protrusion 15. Two water inlet grooves 13 are provided on the side wall of the cavity 11, and the two water inlet grooves 13 are arranged opposite to each other. A threaded hole 14 is provided on the top wall of the cavity 11, communicating with the outside and the cavity 11. A sealing block 6 is threadedly connected inside the threaded hole 14. A tubular pad 16 is formed by an inwardly protruding section on the bottom inner wall of the cavity 11.

[0028] A sliding member 2, which is a columnar copper block, slides up and down within the cavity 11 between the cap and the pad 16. A rubber ring 23 is fitted on the peripheral wall of the sliding member 2. The rubber ring 23 abuts against the inner wall of the cavity 11 and is deformed under pressure.

[0029] The top surface of the sliding component 2 is provided with a limiting post 22, and the side of the cap facing the drain hole 12 is provided with a limiting hole 61. A second spring 42 is also provided inside the cavity 11, located on the upper side wall of the sliding component 2. The second spring 42 is a shape memory alloy spring, located between the cap and the sliding component 2. The top end of the second spring 42 extends into the limiting hole 61 and abuts against the top wall of the limiting hole 61, while the bottom end of the second spring 42 is fitted onto the limiting post 22 and abuts against the top surface of the sliding component 2. The second spring 42 presses the sliding component 2 onto the pad 16, at which point the sliding component 2 is located below the two water inlet grooves 13.

[0030] A spring 41 is also provided inside the cavity 11, and the spring 41 is located on the lower side wall of the sliding member 2. A limiting post 22 is provided on the bottom surface of the sliding member 2. The bottom end of the spring 41 abuts against the bottom wall of the cavity 11, and the top end of the spring 42 is sleeved on the limiting post 21 and abuts against the bottom wall of the sliding member 2.

[0031] The second limiting post 22 is also provided with a sealing post 3. The sealing post 3 includes a connecting post 31 fixed on the first limiting post 21 and a rubber soft block 32 sleeved on the connecting post 31. The end of the rubber soft block 32 away from the connecting post 31 is deformed and wraps around the top of the protrusion 15. The rubber soft block 32 seals the drainage hole 12.

[0032] The working principle of the antifreeze valve in this application is as follows: When the ambient temperature is higher than a specific temperature, the spring force of spring 42 is greater than the elastic force of spring 41. Spring 42 will press the sliding member 2 against the pad 16, causing the rubber soft block 32 to deform and wrap around the top of the protrusion 15, simultaneously sealing the drain hole 12 and keeping it in a normally closed state. At the same time, with the cooperation of the rubber ring 23, the sliding member 2, and the pad 16, water in the water storage box is also difficult to flow into the cavity 11 below the sliding member 2. Therefore, there are two leak-proof measures to ensure the sealing of the antifreeze valve under normal temperature conditions.

[0033] The characteristic of shape memory alloy springs is that their elasticity decreases as the ambient temperature decreases. When the external temperature is below a certain level, the elasticity of spring 42 will be less than that of spring 41. This causes spring 41 to push the sliding member 2 upwards, further compressing spring 42. The upward movement of the sliding member 2 moves the sealing post 3 away from the drain hole 12, removing the blockage and leaving the drain hole 12 open. Simultaneously, the sliding member 2 moves above the two water inlet tanks 13, allowing external water to flow from the two inlet tanks 13 into the cavity 11 below the sliding member 2, and then out of the water storage box through the drain hole 12. This prevents the water in the storage box from freezing and cracking due to low temperatures.

[0034] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A mechanical antifreeze valve, comprising a valve body (1), characterized in that: The valve body (1) has a cavity (11) inside. A drain hole (12) communicating with the outside is opened on the bottom wall of the cavity (11). A water inlet groove (13) is opened on the side wall of the cavity (11). A sliding member (2) is slidably connected inside the cavity (11). A sealing column (3) is provided on the side of the sliding member (2) facing the drain hole (12). A spring (41) and a spring (42) are provided inside the cavity (11). The spring (41) and the spring (42) are respectively located on two opposite side walls of the sliding member (2). 42) is a memory alloy spring. The elastic force of spring one (41) and spring two (42) both act on the sliding member (2). The sliding member (2) drives the sealing column (3) to seal the drainage hole (12), thereby making the drainage hole (12) in a normally closed state. A threaded hole (14) is provided on the top wall of the cavity (11). The threaded hole (14) connects the outside world and the cavity (11). A sealing block (6) is threadedly connected in the threaded hole (14). The two ends of spring two (42) abut against the sealing block (6) and the sliding member (2) respectively.

2. The mechanical antifreeze valve according to claim 1, characterized in that: The bottom surface of the sliding member (2) is provided with a limiting post (21), the sealing post (3) is provided on the limiting post (21), and the top end of the spring (41) is sleeved on the limiting post (21).

3. The mechanical antifreeze valve according to claim 1, characterized in that: The sealing block (6) has a limiting hole (61) on the side facing the drain hole (12). The top surface of the sliding member (2) is provided with a limiting post (22). The top end of the spring (42) extends into the limiting hole (61) and abuts against the top wall of the limiting hole (61). The bottom end of the spring (42) is sleeved on the limiting post (22).

4. A mechanical antifreeze valve according to claim 2, characterized in that: The sealing column (3) includes a connecting column (31) provided on the limiting column (21) and a rubber soft block (32) sleeved on the connecting column (31). The rubber soft block (32) is deformed under pressure and blocks the drainage hole (12).

5. A mechanical antifreeze valve according to claim 4, characterized in that: The connecting post (31) is also provided with an anti-detachment block (7) at the end away from the sliding member (2). The diameter of the anti-detachment block (7) is larger than the diameter of the connecting post (31), and the anti-detachment block (7) is completely located inside the rubber block.

6. A mechanical antifreeze valve according to claim 4, characterized in that: The cavity (11) has a protrusion (15) on its bottom wall, and the drainage hole (12) is opened on the top surface of the protrusion (15). The rubber block (32) deforms at the end away from the connecting column (31) and wraps around the top of the protrusion (15).

7. A mechanical antifreeze valve according to claim 1, characterized in that: The sliding member (2) seals the cavity (11). The sliding member (2) is located below the drainage groove. A rubber ring (23) is sleeved on the peripheral wall of the sliding member (2). The rubber ring (23) abuts against the side wall of the cavity (11) and is deformed by pressure.

8. A mechanical antifreeze valve according to claim 6, characterized in that: The bottom sidewall of the cavity (11) protrudes inward to form a tubular pad (16). The pad (16) is located below the sliding member (2) and on the movement path of the sliding member (2). The bottom surface of the sliding member (2) abuts against the top surface of the pad (16).

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