Frost crack prevention water inlet valve

Abstract

The frost crack prevention water inlet valve comprises a valve assembly, the valve assembly is provided with a valve inner cavity, a water inlet and a water outlet, the water inlet and the water outlet are communicated with the valve inner cavity, the valve inner cavity is provided with a valve port communicated with the water inlet and the water outlet, the valve port is provided with a valve element movably matched with the valve port to open and close the valve port, and the valve assembly is further provided with a frost crack prevention cavity. The inner side end of the anti-frost-crack cavity is communicated with the valve inner cavity, the anti-frost-crack cavity is provided with a movable part and a first elastic part which are movably matched with the anti-frost-crack cavity, when liquid in the valve inner cavity is frozen, the volume of ice blocks expands to drive the movable part to move towards the outer side end of the anti-frost-crack cavity, and when the ice blocks in the valve inner cavity are melted, the movable part is driven to move towards the outer side end of the anti-frost-crack cavity. And the movable part is driven by the first elastic part to move and reset towards the inner side end of the frost crack prevention part. According to the anti-frost-crack water inlet valve, the structure of the anti-frost-crack cavity is arranged, the water inlet valve can be effectively prevented from being damaged, and meanwhile the structural design is simple, reasonable and compact.

Description

Technical Field

[0001] This utility model relates to the field of water valve technology, and more specifically, to an antifreeze crack inlet valve. Background Technology

[0002] The inlet valve of a toilet, when used in certain environments, may experience internal water freezing due to external environmental factors. For example, the inlet valve of a car toilet may freeze and crack in cold outdoor conditions, causing property damage. Currently, most car toilet inlet valves lack anti-freeze / crack protection mechanisms, or their existing designs rely on opening the seal to allow water to flow when the valve freezes, thus preventing cracking. However, in the environment where car toilets are used, both freezing and cracking, or simply opening the seal and allowing water to flow continuously, will cause further damage.

[0003] In view of this, the inventors of this application have invented an antifreeze and crack-proof water inlet valve. Utility Model Content

[0004] The purpose of this invention is to provide an antifreeze inlet valve that can effectively prevent the inlet valve from being damaged by the freezing of water flow.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an anti-freezing and cracking inlet valve, comprising a valve assembly, the valve assembly having a valve cavity, an inlet and an outlet both communicating with the valve cavity, the valve cavity having a valve port connecting the inlet and the outlet, and the valve port having a valve core that is movably engaged with it to open and close the valve port, the valve assembly also having an anti-freezing and cracking cavity, the inner end of the anti-freezing and cracking cavity communicating with the valve cavity, the anti-freezing and cracking cavity having a movable part and a first elastic part that are movably engaged with it, when the liquid in the valve cavity freezes, the ice expands in volume and drives the movable part to move toward the outer end of the anti-freezing and cracking cavity, when the ice in the valve cavity melts, the movable part moves back to its original position toward the inner end of the anti-freezing and cracking cavity under the drive of the first elastic part.

[0006] Furthermore, a second sealing element is provided between the movable component and the inner wall of the antifreeze crack cavity.

[0007] Furthermore, the valve assembly includes a valve body and a housing assembled with the valve assembly, the inner cavity of the housing forming the anti-freeze crack cavity, a first seal is provided between the housing and the valve body, and a second seal is provided between the movable member and the housing.

[0008] Furthermore, the housing includes a front cover and a rear cover assembled with the front cover.

[0009] Furthermore, the movable component is provided with a first step, the inner end of the first elastic component abuts against the first step, and the outer end abuts against the inner wall of the valve assembly.

[0010] Furthermore, the antifreeze crack cavity is provided with a first limiting part and a second limiting part, and the movable part is provided with a first mating part and a second mating part. The first mating part cooperates with the first limiting part and the second mating part cooperates with the second limiting part to make the movable part always move in the antifreeze crack cavity in both the forward and reverse directions.

[0011] Furthermore, the valve assembly is provided with a guide through hole, and the movable part is movably engaged with the guide through hole.

[0012] Furthermore, the valve core includes a bottom cover, a pressure rod, and a second elastic element. One end of the second elastic element abuts against the bottom cover, and the other end abuts against the pressure rod. The pressure rod is provided with a water-stopping part that seals with the valve port. Pressing the pressure rod causes the water-stopping part to move and open the valve port. When the pressing is released, the second elastic element drives the pressure rod to move back to its original position, so that the water-stopping part seals and closes the valve port.

[0013] Furthermore, it also includes a flow regulating component for adjusting the inlet flow rate of the valve cavity, the flow regulating component including an axially movable regulating column, and one end of the regulating column extending into the valve cavity along the radial direction of the inlet flow channel of the valve cavity.

[0014] Furthermore, the anti-freeze and crack inlet valve is the inlet valve of a vehicle toilet.

[0015] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0016] This utility model of an anti-freeze and crack-resistant water inlet valve, through the structure of setting an anti-freeze and crack-resistant cavity, can automatically expand the internal space to adapt to the volume expansion when the water in the inlet valve freezes, and automatically restore when the ice melts, which can effectively prevent the water inlet valve from being damaged. At the same time, the structural design is also simple, reasonable and compact. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the anti-freezing and crack-preventing inlet valve in Embodiment 1 of this utility model when the water flow is not frozen;

[0018] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0019] Figure 3 This is a schematic diagram of the anti-freezing and cracking inlet valve in Embodiment 1 of this utility model when the water freezes;

[0020] Figure 4 This is one of the schematic diagrams of the anti-freezing and cracking inlet valve in Embodiment 2 of this utility model when the water flow is not frozen;

[0021] Figure 5 This is the second schematic diagram of the anti-freezing and cracking inlet valve in Embodiment 2 of this utility model when the water flow is not frozen;

[0022] Figure 6 This is the third schematic diagram of the antifreeze crack inlet valve in Embodiment 2 of this utility model when the water flow has not frozen.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10-Valve body,

[0025] 11-Valve cavity, 12-Inlet, 13-Outlet, 14-Valve port

[0026] 20- Antifreeze crack cavity,

[0027] 21-Moving part, 211-First step, 212-Second step, 213-First mating part, 214-Second mating part

[0028] 22-First elastic element,

[0029] 23-Housing shell, 231-Guide through hole, 232-Front cover, 233-Rear cover, 234-First limiting part, 235-Second limiting part

[0030] 24 - First seal

[0031] 25 - Second seal

[0032] 30-valve core,

[0033] 31-Bottom cover, 32-Pressure rod, 33-Second elastic element, 34-Waterstop part

[0034] 40 - Flow regulating component

[0035] 41-Adjusting column. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0037] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Example 1

[0039] Cooperate Figures 1 to 3As shown, this utility model discloses an anti-freezing and crack-resistant inlet valve, which can effectively prevent the inlet valve from being damaged by the expansion of the water flow due to freezing. It can be used in some usage scenarios where there may be a risk of freezing, such as the inlet valve of a car toilet.

[0040] An antifreeze-crack inlet valve includes a valve assembly. The valve assembly has a valve cavity 11, an inlet 12 and an outlet 13 communicating with the valve cavity 11. The valve cavity 11 has a valve port 14 connecting the inlet 12 and the outlet 13, and the valve port 14 has a valve core 30 that is movably engaged with it to open and close the valve port 14. The valve assembly also has an antifreeze-crack cavity 20, the inner end of which is connected to the valve cavity 11. The antifreeze-crack cavity 20 has a movable member 21 and a first elastic member 22 that are movably engaged with it. When the liquid in the valve cavity 11 freezes, the ice expands and drives the movable member 21 to move toward the outer end of the antifreeze-crack cavity 20. When the ice in the valve cavity 11 melts, the movable member 21 moves back to its original position toward the inner end of the antifreeze-crack cavity under the drive of the first elastic member 22.

[0041] Water flows into the valve cavity 11 from the inlet 12 and through the valve port 14 to the outlet 13. The water finally flows out from the outlet 13. The valve port 14 is a channel connecting the inlet 12 and the outlet 13. The valve core 30 and the valve port 14 are in a sealing fit. When the valve core 30 seals the valve port 14, the inlet 12 and the outlet 13 are not connected, and the inlet valve does not take in water. When the valve core 30 opens the valve port 14, water flows in from the inlet 12 and finally flows out through the outlet 13, and the inlet valve takes in water.

[0042] The anti-freeze and crack-proof cavity 20 enables the water inlet valve to prevent freezing and cracking. The inner end of the antifreeze crack cavity 20 is connected to the valve inner cavity 11. The movable part 21 reciprocates between the inner and outer ends of the antifreeze crack cavity 20. Under normal conditions, the water does not freeze. The movable part 21 seals the inner end of the antifreeze crack cavity 20 under the action of the first elastic element 22. At this time, no water enters the antifreeze crack cavity 20. When the water in the valve inner cavity 11 freezes, the volume of the frozen water will expand significantly. Since the space in other positions of the valve inner cavity 11 cannot be expanded, it will eventually expand to make room in the antifreeze crack cavity 20 to accommodate the expanded volume. Specifically, the volume of the ice expands to the inner end of the antifreeze crack cavity 20 and further expands, driving the movable part 21 to move towards the outer end of the antifreeze crack cavity 20 and compressing the first elastic element 22. When the ice in the valve inner cavity 11 melts, its volume decreases, and the movable part 21 moves back to the inner side of the valve inner cavity 11 under the action of the first elastic element 22.

[0043] The valve assembly includes a valve body 10 and a housing 23 assembled with the valve body 10. The inner cavity of the housing 23 forms the anti-freeze crack cavity 20. A first sealing element 24 is provided between the housing 23 and the valve body 10, and a second sealing element 25 is provided between the moving part 21 and the housing 23. The first sealing element 24 and the second sealing element 25 ensure that the water inlet valve does not leak, while the second sealing element 25 prevents water from entering the anti-freeze crack cavity 20 under normal water flow conditions.

[0044] The engagement between the movable component 21 and the first elastic component 22 is as follows: the movable component 21 is provided with a first step 211, the inner end of the first elastic component 22 abuts against the first step 211, and the outer end abuts against the inner wall of the housing 23. The first step 211 is close to the inner end of the movable component 21, and the first elastic component 22 is sleeved from the outer end of the movable component 21 to the outer periphery of the movable component 21. One end of the first elastic component 22 abuts against the first step 211, and the other end abuts against the inner wall of the outer end of the housing 23.

[0045] In this embodiment, the housing 23 is provided with a guide hole 231, and the movable member 21 is movably engaged with the guide hole 231. Specifically, the guide hole 231 is located at the outer end of the housing 23, and the movable member 21 passes through the guide hole 231 and can reciprocate along the guide hole 231. The guide hole 231 guides and limits the movement of the movable member 21, making the movement of the movable member 21 more stable.

[0046] Cooperate Figure 2 As shown, the structure of the housing 23 is as follows: The housing 23 includes a front cover 232 and a rear cover 233 assembled with the front cover 232. The front cover 232 and the rear cover 233 enclose the antifreeze crack cavity 20. The front cover 232 is located inside the antifreeze crack cavity 20 and is sealed to the valve body 10. Specifically, the first sealing element 24 is provided between the front cover 232 and the valve body 10, and the second sealing element 25 is provided between the movable part 21 and the inner wall of the front cover 232.

[0047] In this embodiment, the front cover 232 and the valve body 10, and the movable part 21 and the inner wall of the front cover 232 are sealed together, while the front cover 232 and the rear cover 233 are not sealed together. The second sealing member 25 is located inside the front cover 232 and is sealed together with the inner wall of the front cover 232. During the movement of the movable part 21, the second sealing member 25 always moves along the inner wall of the front cover 232 to prevent water leakage at the assembly point of the front cover 232 and the rear cover 233.

[0048] In this embodiment, the antifreeze crack cavity 20 is provided with a first limiting part 234 and a second limiting part 235, and the movable part 21 is provided with a first mating part 213 and a second mating part 214. The first mating part 213 cooperates with the first limiting part 234, and the second mating part 214 cooperates with the second limiting part 235 so that the movable part 21 always moves in the antifreeze crack cavity 20 in both the forward and reverse directions. Specifically, a first limiting part 234 is provided on the rear cover 233, extending inward from the outer periphery of the guide hole 231. A second limiting part 235 is provided on the inner end of the front cover 232. The movable member 21 is provided with a second step 212. The outer end of the second step 212 forms a first mating part 213, and the inner end of the first step 211 forms a second mating part 214. When the movable member 21 moves towards the outer end of the antifreeze crack cavity 20, the second step 212 engages with the first limiting part 234, preventing the movable member 21 from moving further outward. When the movable member 21 moves towards the inner end of the antifreeze crack cavity 20, the first step 211 engages with the second limiting part 235, preventing the movable member 21 from moving further inward. In other embodiments, only the first step 211 may be provided, with the outer and inner ends of the first step 211 forming the first mating part 213 and the second mating part 214, respectively. Preferably, the first limiting part 234 extends inward from the outer periphery of the guide through hole 231, and the first elastic member 22 is fitted onto the outer periphery of the first limiting part 234, resulting in an ingenious and compact overall structural design.

[0049] Cooperate Figure 1 As shown, the valve core 30 includes a bottom cover 31, a pressure rod 32, and a second elastic element 33. One end of the second elastic element 33 abuts against the bottom cover 31, and the other end abuts against the pressure rod 32. The pressure rod 32 is provided with a water-stopping part 34 that seals with the valve port 14. Pressing the pressure rod 32 causes the water-stopping part 34 to move and open the valve port 14. When the pressing is released, the second elastic element 33 drives the pressure rod 32 to move back to its original position, so that the water-stopping part 34 seals and closes the valve port 14.

[0050] Specifically, the valve port 14 has a trapezoidal cross-section. One end of the pressure rod 32 extends into the valve cavity 11 and abuts against the second elastic element 33, while the other end extends out of the valve body 10. The second elastic element 33 drives the water-stopping part 34 to always tend to move towards the valve port 14. At the same time, due to the trapezoidal limiting fit between the water-stopping part 34 and the valve port 14, the second elastic element 33 drives the water-stopping part 34 to press and seal the trapezoidal valve port 14. Preferably, the end of the pressure rod 32 extending out of the valve body 10 is also provided with a pressing panel (not shown in the figure) for easy pressing of the pressure rod 32.

[0051] The anti-freeze and crack inlet valve also includes a flow regulating component 40 for adjusting the inlet flow rate of the valve cavity 11. The flow regulating component 40 adjusts the inlet flow rate, making its use more flexible. Specifically, the flow regulating component 40 includes an axially movable regulating column 41, one end of which extends into the valve cavity 11 along the radial direction of the inlet flow channel. The regulating column 41 is threaded into the valve body 10 (with a sealed fit on the inner side). When the regulating column 41 is screwed into the valve cavity 11, its end occupies the inlet flow channel, reducing the cross-sectional area of ​​the inlet flow channel and thus reducing the inlet flow rate. When the regulating column 41 is screwed out of the valve cavity 11, the cross-sectional area of ​​the inlet flow channel increases, thereby increasing the inlet flow rate.

[0052] Example 2

[0053] Cooperate Figure 4 As shown, the main difference between this embodiment and Embodiment 1 lies in the different mating structures of the movable part 21 and the valve assembly. In this embodiment, the antifreeze crack cavity 20 is provided with a first limiting part 234 and a second limiting part 235, and the movable part 21 is provided with a first mating part 213 and a second mating part 214. The first mating part 213 cooperates with the first limiting part 234, and the second mating part 214 cooperates with the second limiting part 235 to ensure that the movable part 21 always moves within the antifreeze crack cavity 20. Specifically, the first limiting part 234 extends inward from the outer periphery of the guide hole 231 provided on the rear cover 233, and the first elastic member 22 is sleeved on the outer periphery of the first limiting part 234. The second limiting part 235 is the outer end of the rear cover 233. The first mating part 213 is the outer end of the second step 212 in embodiment 1. The second mating part 214 is a convex ring provided on the outer periphery of the movable member 21 and is located outside the rear cover 233. Under the limiting cooperation of the first mating part 213 and the first limiting part 234, and the second mating part 214 and the second limiting part 235, the movable member 21 always moves in the antifreeze crack cavity 20. Specifically, the second sealing member 25 always moves along the inner wall of the front cover 232.

[0054] In other embodiments, in conjunction with Figure 5 As shown, the shell 23 is a single unit.

[0055] In other embodiments, in conjunction with Figure 6 As shown, the housing 23 and the valve body 10 are integrally formed as a whole.

[0056] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A freeze-proof inlet valve, characterized in that: The device includes a valve assembly having a valve cavity, an inlet and an outlet both communicating with the valve cavity. The valve cavity has a valve port connecting the inlet and the outlet, and the valve port has a valve core that is movably engaged with it to open and close the valve port. The valve assembly also has an anti-freeze cracking cavity, the inner end of which is connected to the valve cavity. The anti-freeze cracking cavity has a movable member and a first elastic member that are movably engaged with it. When the liquid in the valve cavity freezes, the ice expands and drives the movable member to move toward the outer end of the anti-freeze cracking cavity. When the ice in the valve cavity melts, the movable member moves back to its original position toward the inner end of the anti-freeze cracking cavity under the drive of the first elastic member.

2. The antifreeze crack inlet valve as described in claim 1, characterized in that: A second sealing element is provided between the movable part and the inner wall of the antifreeze crack cavity.

3. The antifreeze crack inlet valve as described in claim 2, characterized in that: The valve assembly includes a valve body and a housing assembled with the valve assembly. The inner cavity of the housing forms the anti-freeze crack cavity. A first seal is provided between the housing and the valve body, and a second seal is provided between the moving part and the housing.

4. The antifreeze crack inlet valve as described in claim 3, characterized in that: The housing includes a front cover and a rear cover assembled with the front cover.

5. The antifreeze crack inlet valve as described in claim 1, characterized in that: The movable component is provided with a first step, the inner end of the first elastic component abuts against the first step, and the outer end abuts against the inner wall of the valve assembly.

6. The antifreeze crack inlet valve as described in claim 1, characterized in that: The antifreeze crack cavity is provided with a first limiting part and a second limiting part, and the movable part is provided with a first mating part and a second mating part. The first mating part cooperates with the first limiting part and the second mating part cooperates with the second limiting part to make the movable part always move in the antifreeze crack cavity in both the forward and reverse directions.

7. The antifreeze crack inlet valve as described in claim 1, characterized in that: The valve assembly is provided with a guide through hole, and the movable part is movably engaged with the guide through hole.

8. The antifreeze crack inlet valve as described in claim 1, characterized in that: The valve core includes a bottom cover, a pressure rod, and a second elastic element. One end of the second elastic element abuts against the bottom cover, and the other end abuts against the pressure rod. The pressure rod is provided with a water-stopping part that seals with the valve port. Pressing the pressure rod causes the water-stopping part to move and open the valve port. When the pressing is released, the second elastic element drives the pressure rod to move back to its original position, so that the water-stopping part seals and closes the valve port.

9. The antifreeze crack inlet valve as described in claim 1, characterized in that: It also includes a flow regulating component for adjusting the inlet flow rate of the valve cavity, the flow regulating component including an axially movable regulating column, and one end of the regulating column extending into the valve cavity along the radial direction of the inlet flow channel of the valve cavity.

10. The antifreeze crack inlet valve as described in claim 1, characterized in that: The anti-freeze and crack inlet valve is the inlet valve for a vehicle toilet.

Images