Frost crack prevention waterway control valve

Abstract

The utility model discloses a frost crack prevention waterway control valve, which comprises a valve body and a valve core, the valve body comprises a valve core seat and a valve cover, a valve core cavity, a water inlet and a water outlet are arranged in the valve core seat, the water inlet and the water outlet are communicated with the valve core cavity, and a water passing hole is formed between the water inlet and the water outlet. The valve element comprises a balance plug body used for opening and closing the water passing hole, the lower end of the balance plug body is connected with the water passing hole in a sealed mode through a first sealing piece, the lower end of the balance plug body is sunken upwards to form a first annular groove, so that a protruding column is formed in the middle of the balance plug body, and the first sealing piece is arranged outside the protruding column in a sleeving mode. The first sealing piece is provided with a sealing boss embedded in the first annular groove, an ice discharging channel is formed between the sealing boss and the first annular groove, and a plurality of ice discharging holes communicated with the ice discharging channel are formed in the outer side wall, corresponding to the first annular groove, of the balance plug body. The lower end of the first sealing piece is concaved upwards to form a deformation groove, so that the part, arranged outside the protruding column in a sleeving mode, of the lower end of the first sealing piece forms a deformation part, an opening allowing the balance plug body to be installed in the valve element cavity is further formed in the valve element base, and the valve deck fixedly covers the opening. The upper end of the balance plug body is connected with the valve deck in a sealed mode through a second sealing piece. The anti-frost-crack waterway control valve is good in sealing performance during use, capable of discharging ice and preventing frost crack during freezing, simple and compact in structure and free of increase of the size of the valve body on the premise of having a good anti-frost-crack effect.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a waterway control valve which is resistant to freezing and cracking. Background Art

[0002] The existing water circuit control valve usually includes a valve body and a valve core, and the valve body includes a valve seat and a valve cover. The valve seat is provided with a valve cavity and a water inlet and a water outlet connected to the valve cavity. The valve seat is also provided with an opening for the valve core to be installed in the valve cavity. The valve cover is fixedly covered on the opening and limits the valve core in the valve cavity. The connection or disconnection between the water inlet and the water outlet or the switching of the water circuit is controlled by manually or electrically driving the valve core. In the current water circuit control valve structure, the water inside expands in volume after freezing in a low-temperature use environment, and the valve body often freezes and cracks, which leads to water valve leakage.

[0003] Some water control valves with anti-freeze cracking structures have also appeared on the market. For example, Chinese patent application with publication number CN115405720A discloses a faucet assembly and faucet for anti-freeze cracking, the faucet assembly comprising: a shell; a valve core; a valve seat body; an elastic member; a guide connecting column; the valve core is arranged in the shell, the valve seat body is movably arranged in the shell, the guide connecting column is connected to the valve seat body and guidely connected to the shell, the elastic member is biased between the shell and the valve seat body, the guide connecting column and the valve seat body extend with a water inlet channel and a water outlet channel that can be connected to the valve core; the faucet assembly includes a use state and a frozen state, when in the use state, the elastic member biases the valve core seat to make the valve seat body press against and connect the valve core, when in the frozen state, the water in the water inlet channel, the water outlet channel, the valve seat body or the valve core freezes and expands to drive the valve seat body away from the valve core, and the elastic member accumulates a reset force. When in use, the faucet assembly is used normally. When in a frozen state, the faucet assembly is affected by the external temperature, and the water in the water inlet channel, water outlet channel, valve seat body or valve core freezes and expands. The water between the valve core and the valve seat body freezes and expands to drive the valve seat body away from the valve core. When the external temperature rises, the ice in the water inlet channel, water outlet channel, valve seat body or valve core thaws and turns into water. The elastic member drives the valve seat body to press against and connect to the valve core, and the faucet assembly automatically returns to the use state, with a good antifreeze effect. However, the above antifreeze cracking structure is relatively complex, which undoubtedly increases the cost of the product and is not conducive to the miniaturization design of the product. Utility Model Content

[0004] The utility model aims to provide a water circuit control valve to prevent freezing and cracking, which has good sealing performance when in use, can discharge ice to prevent freezing and cracking when ice forms, has a simple and compact structure, and does not increase the volume of the valve body while having a good anti-freezing and cracking effect.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A water circuit control valve for preventing frost cracking, comprising a valve body and a valve core, the valve body comprising a valve core seat and a valve cover, a valve core cavity and a water inlet and a water outlet connected to the valve core cavity are arranged in the valve core seat, a water through hole is formed between the water inlet and the water outlet, the valve core comprises a balancing plug body for opening and closing the water through hole, the lower end of the balancing plug body is sealed and connected to the water through hole through a first sealing member, the lower end of the balancing plug body is recessed upward to form a first annular groove, so that a convex column is formed in the middle of the balancing plug body, the first sealing member is sleeved outside the convex column, and the first sealing member is The component has a sealing boss embedded in the first annular groove, an ice discharge channel is provided between the sealing boss and the first annular groove, a plurality of ice discharge holes connected with the ice discharge channel are provided on the outer side wall of the balancing plug body corresponding to the first annular groove, a sealing portion tightly hugging the outside of the convex column is formed on the inner side of the lower end of the first sealing component, and the water circuit control valve has a use state and a freezing state. When in the use state, the sealing sleeve of the first sealing component is arranged outside the convex column, and when in the freezing state, a gap connected with the ice discharge channel is formed between the first sealing component and the convex column.

[0007] The lower end of the first sealing member is recessed upward to form a deformation groove, so that the lower end of the first sealing member is divided into a deformation portion located outside the deformation groove and the sealing portion located inside the deformation groove.

[0008] A serration portion is provided at the upper end of the sealing boss, or a clearance hole is provided at a position of the side wall of the sealing boss corresponding to the ice discharge hole.

[0009] A plurality of reinforcing ribs are vertically arranged in the first annular groove.

[0010] The reinforcing ribs and the ice discharge holes are staggered with each other, and the lower end of each reinforcing rib abuts against the upper end of the sealing boss.

[0011] The valve core seat is also provided with an opening for the balancing plug body to be installed in the valve core cavity, the valve cover fixing cover is arranged on the opening, and the upper end of the balancing plug body is sealed and connected to the valve cover through a second sealing member.

[0012] A second annular groove is recessed inwardly near the upper end of the balancing plug body, an embedded portion embedded in the second annular groove is formed on the inner side of the second sealing member, and a sealing flange sealedly connected to the valve cover is formed on the outer side of the second sealing member.

[0013] A water pressure balancing chamber is formed between the balancing plug body and the valve cover, a balancing channel connected with the water hole and the water pressure balancing chamber is provided in the balancing plug body, the balancing plug body is limited in the valve core chamber by a mounting seat, the mounting seat is sleeved on the balancing plug body, a guide hole connected with the water pressure balancing chamber is provided in the valve cover, a pressure relief hole isolated from the guide hole is also provided in the valve cover, a pressure relief water flow channel is provided in the valve cover along its radial direction, a water inlet of the pressure relief water flow channel is connected with the pressure relief hole, a water outlet of the pressure relief water flow channel is provided on the side wall of the valve cover, and a water outlet channel connected with the water outlet of the pressure relief water flow channel is provided on the side wall of the valve cover.

[0014] A non-return member with a one-way water flow function is arranged in the balancing channel, and the non-return member can be movably arranged in the balancing channel.

[0015] A solenoid valve for controlling the valve core is also arranged in the valve core seat.

[0016] After adopting the above structure, the utility model provides a water circuit control valve for preventing frost cracking, improves the structure of the valve core, specifically improves the structure of the balancing plug body and the first sealing member, the first sealing member is sleeved outside the convex column of the balancing plug body, and the first sealing member has a sealing boss embedded in the first annular groove, an ice discharge channel is provided between the sealing boss and the first annular groove, a plurality of ice discharge holes are provided on the outer side wall of the balancing plug body corresponding to the first annular groove, a sealing portion tightly hugging the outer side of the convex column is formed on the inner side of the lower end of the first sealing member, and the water circuit control valve has a use state and a freezing state, when the water circuit control valve is in the use state, the sealing between the water hole and the water outlet is realized by the first sealing member, and the first sealing member is used to seal the water passage hole and the water outlet. The pressure on the side of the water inlet corresponding to the seal is greater than the pressure on the side of the water outlet corresponding to the first seal. When the water circuit control valve is in a frozen state, it cannot be used. Due to the pressure difference, the first seal is squeezed and deformed laterally, thereby pulling the sealing part, so that a gap is formed between the sealing part and the boss of the balancing plug body, so that ice debris can slowly enter the ice discharge channel between the sealing boss and the first annular groove through the gap, and enter the water outlet from the ice discharge hole, and finally be discharged from the water outlet, thereby preventing the water circuit control valve from freezing and cracking. When the water circuit control valve is restored to use, the first seal can continue to play a sealing role and will not affect the normal use of the water circuit control valve.

[0017] Therefore, the utility model is a water circuit control valve that prevents frost cracking. The structure of the first sealing component and the balance plug body is improved on the basis of the original structure of the water circuit control valve without adding any unnecessary accessories. The structure is simple and compact. It does not increase the volume of the valve body while having a good anti-freeze cracking effect, thus saving costs and being suitable for product promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a first embodiment of a waterway control valve for preventing freezing and cracking according to the utility model;

[0019] Figure 2 This is a structural schematic diagram of a valve core in a first embodiment of a waterway control valve for preventing freezing and cracking according to the utility model;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of a first embodiment of a water circuit control valve for preventing freezing and cracking of the utility model;

[0021] Figure 4 It is a partially enlarged schematic diagram of a first embodiment of a waterway control valve for preventing freezing and cracking according to the utility model;

[0022] Figure 5 It is a structural schematic diagram of a balancing plug body and a first sealing member in a first embodiment of a waterway control valve for preventing freezing and cracking of the utility model;

[0023] Figure 6 It is another structural schematic diagram of the balance plug body and the first sealing member in the first embodiment of the anti-freeze cracking waterway control valve of the utility model;

[0024] Figure 7 This is a structural schematic diagram of a valve cover in a first embodiment of a water circuit control valve for preventing freezing and cracking according to the utility model;

[0025] Figure 8 This is a structural schematic diagram of a valve core in a second embodiment of a waterway control valve for preventing freezing and cracking according to the utility model;

[0026] Fig. 9 It is a partially enlarged schematic diagram of a second embodiment of a waterway control valve for preventing freezing and cracking according to the utility model;

[0027] Fig.10 It is a structural schematic diagram of a balancing plug body and a first sealing member in a second embodiment of a waterway control valve for preventing freezing and cracking of the utility model;

[0028] Fig.11 It is a schematic diagram of the exploded structure of the balance plug body and the first sealing member in the fourth embodiment of the anti-freeze cracking waterway control valve of the utility model;

[0029] Fig.12 It is a structural schematic diagram of a balancing plug body and a first sealing member in a fourth embodiment of a water circuit control valve for preventing freezing and cracking of the utility model.

[0030] In the figure:

[0031] Valve core 1 Balance plug 11

[0032] First annular groove 111 convex column 112

[0033] Ice discharge hole 113 Reinforced rib 114

[0034] Mounting seat 12 Water outlet channel 121

[0035] First sealing member 13 Sealing boss 131

[0036] Deformation groove 132 Sealing portion 133

[0037] Deformation portion 134 Sawtooth portion 135

[0038] Ice discharge channel 14 Second sealing member 15

[0039] Embedding portion 151 Sealing flange 152

[0040] Valve core seat 2 Valve core cavity 21

[0041] Water inlet 22 Water outlet 23

[0042] Water hole 24 Valve cover 3

[0043] Diversion channel 31 Pressure relief channel 32

[0044] Water pressure balance chamber 4 Solenoid valve 5

[0045] Anti-return member 6 First limit member 71

[0046] Second limiter 72 Flow regulating member 8

[0047] Filter 9 DETAILED DESCRIPTION

[0048] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0049] Embodiment 1

[0050] A waterway control valve to prevent freezing and cracking, such as Figure 1-Figure 5 and Figure 7 As shown, it includes a valve body and a valve core 1, the valve body includes a valve core seat 2 and a valve cover 3, a valve core cavity 21 and a water inlet 22 and a water outlet 23 connected to the valve core cavity 21 are provided in the valve core seat 2, and a water hole 24 is formed between the water inlet 22 and the water outlet 23.

[0051] The valve core 1 includes a balancing plug body 11 for opening and closing the water hole. A mounting seat 12 is provided on the outer shell of the balancing plug body 11. An annular step is provided in the valve core cavity 21 and is clamped with the outer side of the mounting seat 12, so as to limit the balancing plug body 11 in the valve core cavity 21.

[0052] The lower end of the balancing plug body 11 is sealed and connected to the water hole 24 through the first sealing member 13. The first sealing member 13 is a rubber sealing member. The lower end of the balancing plug body 11 is recessed upward to form a first annular groove 111, so that a convex column 112 is formed in the middle of the balancing plug body 11. The first sealing member 13 is sleeved outside the convex column 112, and the first sealing member 13 has a sealing boss 131 embedded in the first annular groove 111. The upper end of the sealing boss 131 cooperates with the bottom of the first annular groove 111 to form an ice discharge channel 14. A plurality of ice discharge holes 113 are opened along the circumference of the outer side wall of the balancing plug body 11 corresponding to the first annular groove 111. Each ice discharge hole 113 is at least partially exposed outside the mounting seat 12. In this embodiment, when the sealing boss 131 is embedded in the first annular groove 111, the upper end of the sealing boss 131 is not higher than the ice discharge hole 113, so that each ice discharge hole 113 can be connected to the ice discharge channel 14.

[0053] Better, such as Figure 6 As shown, a plurality of reinforcing ribs 114 are vertically arranged in the first annular groove 111, and each reinforcing rib 114 is staggered with each ice discharge hole 113, and the lower end of each reinforcing rib 114 abuts against the upper end of the sealing boss 131, thereby ensuring that the first sealing member 13 is installed more firmly, thereby ensuring the sealing performance of the first sealing member 13. The lower end of the first sealing member 13 is recessed upward to form a deformation groove 132, so that the lower end of the first sealing member 13 is divided into a sealing portion 133 located inside the deformation groove 132 and a deformation portion 134 located outside the deformation groove 132, and the sealing portion 133 is sealed and sleeved outside the boss 112. When the waterway control valve is in a closed state, the lower end of the first sealing member 13 abuts against the water hole 24, thereby forming a sealing surface.

[0054] The valve core seat 2 is also provided with an opening for the balancing plug body 11 to be installed in the valve core cavity 21. The valve cover 3 is fixedly covered on the opening. The upper end of the balancing plug body 11 is sealed and connected to the valve cover 3 through the second sealing member 15. The second sealing member 15 is also a rubber sealing member. A second annular groove is recessed inward near the upper end of the balancing plug body 11. An embedded portion 151 embedded in the second annular groove is formed on the inner side of the second sealing member 15. A sealing flange 152 sealed and connected to the valve cover 3 is formed on the outer side of the second sealing member 15. The sealing flange 152 is sandwiched between the mounting seat 12 and the valve cover 3, so that a water pressure balancing cavity 4 is formed between the balancing plug body 11 and the valve cover 3.

[0055] A balancing channel connected to the water hole 24 and the water pressure balancing chamber 4 is provided in the balancing plug body 11, a flow guide channel 31 connected to the water pressure balancing chamber 4 is provided in the valve cover 3, a pressure relief channel 32 isolated from the flow guide channel 31 is also provided in the valve cover 3, and a water outlet channel 121 connected to the water outlet of the pressure relief channel 32 is provided on the side wall of the mounting seat 12. A solenoid valve 5 is also provided in the valve core seat 2, and the solenoid valve 5 is used to control the on-off between the flow guide channel 31 and the pressure relief channel 32. The control method of the solenoid valve 5 is a well-known technology in the art and will not be described in detail here.

[0056] A check member 6 with a one-way water flow function is provided in the balancing channel. The check member 6 can be movably arranged in the balancing channel. The diameter of the check member 6 is smaller than the diameter of the balancing channel. The end of the check member 6 facing the water inlet 22 is a conical structure, and the end facing the water pressure balance chamber 4 is a columnar structure. Both ends of the balancing channel have a first limit member 71 for preventing the check member 6 from leaving the balancing channel along the water inlet direction and a second limit member 72 for preventing the check member 6 from leaving the balancing channel along the direction of the water pressure balance chamber 4. The end surface of the first limit member 71 and the check member 6 that fit each other is a conical structure. Preferably, the second limit member 72 and the balancing plug body 11 are an integral structure.

[0057] A flow regulating member 8 for regulating water flow is movably provided at the bottom of the valve cover 3. One end of the flow regulating member 8 extends into the balancing channel. The diameter of the flow regulating member 8 is smaller than the diameter of the balancing channel. During the up and down movement of the balancing plug body 11, the balancing channel and the flow regulating member 8 are driven to slide and cooperate. A filter screen 9 is provided at one end of the balancing plug body 11 close to the water hole 24.

[0058] The flow regulating member 8 is a frustum with a gradually increasing cross section. The diameter of the flow regulating member 8 gradually increases from the end close to the water pressure balance chamber 4 to the end close to the water inlet 22, and its outer wall forms an inclined wall. The stop reverse member 6, the first limit member 6, the second limit member 7 and the flow regulating member 8 of the utility model are well-known components in the art. Since the flow and pressure of water are limited by the distance between the balance channel and the inclined wall of the flow regulating member 8, the flow regulating member with a gradually increasing cross section can be closed, quickly descended and slowly closed, which can prevent the destructive water hammer phenomenon and reduce noise.

[0059] After adopting the above structure, the utility model is a water circuit control valve for preventing frost cracking. When in use, the first sealing member 13 can achieve a normal sealing effect. The solenoid valve 5 is opened, so that the guide channel 31 and the pressure relief channel 32 are connected. The water in the water pressure balance chamber 4 flows through the guide channel 31, the pressure relief channel 32 and the water outlet channel 121 of the mounting seat 12 on the valve cover 3 in turn, and then flows out from the water outlet 23. At this time, the water pressure in the water hole 24 is greater than the water pressure in the water pressure balance chamber 4. Therefore, under the action of the pressure difference, the balancing plug body 11 moves upward, the sealing surface opens, so that the water inlet 22 and the water outlet 23 are connected, and the large water circuit is opened. When the solenoid valve 5 is closed, the guide channel 31 and the pressure relief channel 32 are blocked, and the water in the water pressure balance chamber 4 has nowhere to drain. The pressure in the water pressure balance chamber 4 gradually increases, gradually pushing the balancing plug body 11 to move downward until the water inlet 22 is closed, thereby achieving the purpose of closing the water circuit.

[0060] When the water circuit control valve is in normal use, the pressure on the side of the first seal 13 corresponding to the water inlet 22 is greater than the pressure on the side of the first seal 13 corresponding to the water outlet 23. Due to the pressure difference, the deformation portion 134 of the first seal 13 is squeezed to produce lateral deformation, thereby pulling the sealing portion 133. Since the liquid pressure is balanced, the pressure on the deformation portion 134 in all directions is also balanced, so that the sealing portion 133 can always be held on the boss 112 even when being pulled, and can maintain sealing and can be used normally.

[0061] When the water circuit control valve begins to freeze, water expands when it turns into ice, and the pressure also increases suddenly. In addition, the freezing speed of different parts is different, resulting in unbalanced pressure on the deformed portion 134 in all directions, thereby pulling the sealing portion 133, so that a gap is formed between the sealing portion 133 and the boss 112 of the balancing plug body 11, so that ice debris can slowly enter the ice discharge channel 14 between the sealing boss 131 and the first annular groove 111 through the gap, and enter the water outlet 23 from the ice discharge hole 113, and finally be discharged from the water outlet 23, thereby preventing the water circuit control valve from freezing and cracking. When the water circuit control valve is restored to use, the first sealing component 13 can still continue to play a sealing role and will not affect the normal use of the water circuit control valve.

[0062] Therefore, the utility model is a water circuit control valve for preventing frost cracking. On the basis of the structure of the original water circuit control valve, the structure of the first sealing member 13 and the balance plug body 11 are improved without adding any unnecessary accessories. The structure is simple and compact. It can achieve good anti-freeze cracking effect without increasing the volume of the valve body, thus saving costs and being suitable for product promotion.

[0063] It should be noted that this embodiment only lists one structure of the balancing channel in the balancing plug body 11. After the balancing plug body 11 with other balancing channel structures is installed with the first sealing member 13, the purpose of preventing the valve body from freezing and cracking can also be achieved.

[0064] Embodiment 2

[0065] The difference from the first embodiment is that:

[0066] In this embodiment, if Figure 8-Figure 10 As shown, the lower end of the balancing plug body 11 is sealed and connected to the water hole 24 through the first sealing member 13. The first sealing member 13 is a rubber sealing member. The lower end of the balancing plug body 11 is recessed upward to form a first annular groove 111, so that a convex column 112 is formed in the middle of the balancing plug body 11. The first sealing member 13 is sleeved outside the convex column 112, and the first sealing member 13 has a sealing boss 131 embedded in the first annular groove 111. An ice discharge channel 14 is provided between the sealing boss 131 and the first annular groove 111. A plurality of ice discharge holes 113 are provided on the outer side wall of the balancing plug body 11 corresponding to the first annular groove 111. A serration portion 135 is provided at the upper end of the sealing boss 131, so that each ice discharge hole 113 can be connected to the ice discharge channel 14. The depth of the upper end of the sealing boss 131 extending into the first annular groove 111 is not required. The lower end of the first seal 13 is recessed upward to form a deformation groove 132 , so that the lower end of the first seal 13 is divided into a sealing portion 133 located inside the deformation groove 132 and a deformation portion 134 located outside the deformation groove 132 . The sealing portion 133 is sealed and sleeved outside the boss 112 .

[0067] In this embodiment, the first sealing member 13 can also automatically discharge ice debris under pressure, thereby preventing the valve body from freezing and cracking.

[0068] Embodiment 3

[0069] The difference from implementation 1 is:

[0070] In this embodiment, the lower end of the balancing plug body 11 is sealed and connected to the water hole 24 through the first sealing member 13. The first sealing member 13 is a rubber sealing member. The lower end of the balancing plug body 11 is recessed upward to form a first annular groove 111, so that a convex column 112 is formed in the middle of the balancing plug body 11. The first sealing member 13 is sleeved outside the convex column 112, and the first sealing member 13 has a sealing boss 131 embedded in the first annular groove 111. The balancing plug body 11 is provided with a plurality of ice discharge holes 113 on the outer side wall corresponding to the first annular groove 111. The side wall of the sealing boss 131 is provided with clearance holes corresponding to the positions of the plurality of ice discharge holes 113. The clearance holes serve as the ice discharge channel 14, so that each ice discharge hole 113 can be connected to the ice discharge channel 14. The depth of the upper end of the sealing boss 131 extending into the first annular groove 111 is not required. The lower end of the first seal 13 is recessed upward to form a deformation groove 132 , so that the lower end of the first seal 13 is divided into a sealing portion 133 located inside the deformation groove 132 and a deformation portion 134 located outside the deformation groove 132 . The sealing portion 133 is sealed and sleeved outside the boss 112 .

[0071] In this embodiment, the first sealing member 13 can also automatically discharge ice debris under pressure, thereby preventing the valve body from freezing and cracking.

[0072] The clearance hole in this embodiment may not be arranged corresponding to the ice discharge hole 113. In this case, a structure such as an annular groove needs to be provided on the sealing boss 131 to connect the clearance hole with the ice discharge hole 113. Such a deformation arrangement belongs to conventional design and falls within the protection scope of the present utility model.

[0073] Embodiment 4

[0074] The difference from implementation 1 is:

[0075] In this embodiment, if Figure 11-12 As shown, the first seal 13 is a rubber seal, the lower end of the balancing plug body 11 is recessed upward to form a first annular groove 111, so that a convex column 112 is formed in the middle of the balancing plug body 11, the first seal 13 is sleeved outside the convex column 112, and the first seal 13 has a sealing boss 131 embedded in the first annular groove 111, and a plurality of ice discharge holes 113 are opened on the outer wall of the balancing plug body 11 corresponding to the first annular groove 111, and a sealing portion 133 is formed on the inner side of the lower end of the first seal 13 to hug the outside of the convex column 112, and a serration portion 135 is provided on the upper end of the sealing boss 131, so that each ice discharge hole 113 can be connected to the ice discharge channel 14. That is, in this embodiment, the first seal 13 cancels the setting of the deformation groove.

[0076] In this embodiment, the first sealing member 13 can also automatically discharge ice debris under pressure, thereby preventing the valve body from freezing and cracking.

[0077] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A waterway control valve for preventing freezing and cracking, comprising a valve body and a valve core, the valve body comprising a valve core seat and a valve cover, the valve core seat being provided with a valve core cavity and a water inlet and a water outlet connected to the valve core cavity, a water hole being formed between the water inlet and the water outlet, the valve core comprising a balancing plug body for opening and closing the water hole, characterized in that: The lower end of the balancing plug body is sealed and connected to the water hole through a first sealing member. The lower end of the balancing plug body is recessed upward to form a first annular groove, so that a convex column is formed in the middle of the balancing plug body. The first sealing member is sleeved outside the convex column, and the first sealing member has a sealing boss embedded in the first annular groove. An ice discharge channel is provided between the sealing boss and the first annular groove. A plurality of ice discharge holes connected to the ice discharge channel are provided on the outer side wall of the balancing plug body corresponding to the first annular groove. A sealing portion that is tightly embraced to the outside of the convex column is formed on the inner side of the lower end of the first sealing member. The water circuit control valve has a use state and a freezing state. When in the use state, the first sealing member is sealingly sleeved outside the convex column. When in the freezing state, a gap connected to the ice discharge channel is formed between the first sealing member and the convex column.

2. The anti-freeze cracking waterway control valve according to claim 1, characterized in that: The lower end of the first sealing member is recessed upward to form a deformation groove, so that the lower end of the first sealing member is divided into a deformation portion located outside the deformation groove and the sealing portion located inside the deformation groove.

3. The anti-freeze cracking waterway control valve according to claim 1, characterized in that: A serration portion is provided at the upper end of the sealing boss, or a clearance hole is provided at a position of the side wall of the sealing boss corresponding to the ice discharge hole.

4. The anti-freeze cracking waterway control valve according to claim 1, characterized in that: A plurality of reinforcing ribs are vertically arranged in the first annular groove.

5. The anti-freeze cracking waterway control valve according to claim 4, characterized in that: The reinforcing ribs and the ice discharge holes are staggered with each other, and the lower end of each reinforcing rib abuts against the upper end of the sealing boss.

6. The anti-freeze cracking waterway control valve according to claim 1, characterized in that: The valve core seat is also provided with an opening for the balancing plug body to be installed in the valve core cavity, the valve cover fixing cover is arranged on the opening, and the upper end of the balancing plug body is sealed and connected to the valve cover through a second sealing member.

7. The anti-freeze cracking waterway control valve according to claim 6, characterized in that: The balancing plug body has a second annular groove recessed inwardly near the upper end thereof, the inner side of the second sealing member forms an embedding portion embedded in the second annular groove, and the outer side of the second sealing member forms a sealing flange sealedly connected to the valve cover.

8. The anti-freeze cracking waterway control valve according to claim 1, characterized in that: A water pressure balancing chamber is formed between the balancing plug body and the valve cover, a balancing channel connected with the water hole and the water pressure balancing chamber is provided in the balancing plug body, the balancing plug body is limited in the valve core chamber by a mounting seat, the mounting seat is sleeved on the balancing plug body, a guide hole connected with the water pressure balancing chamber is provided in the valve cover, a pressure relief hole isolated from the guide hole is also provided in the valve cover, a pressure relief water flow channel is provided in the valve cover along its radial direction, a water inlet of the pressure relief water flow channel is connected with the pressure relief hole, a water outlet of the pressure relief water flow channel is provided on the side wall of the valve cover, and a water outlet channel connected with the water outlet of the pressure relief water flow channel is provided on the side wall of the valve cover.

9. The anti-freeze cracking waterway control valve according to claim 8, characterized in that: A non-return member with a one-way water flow function is arranged in the balancing channel, and the non-return member can be movably arranged in the balancing channel.

10. The anti-freeze cracking waterway control valve according to claim 1, characterized in that: A solenoid valve for controlling the valve core is also arranged in the valve core seat.

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