Vent valve and pump set

Abstract

The embodiment of the utility model provides a vent valve and a pump set, and relates to the technical field of pump sets, the vent valve comprises a valve body assembly and a valve core assembly. The valve body assembly is provided with a mounting cavity, a first valve port and a second valve port, the first valve port and the second valve port are communicated through the mounting cavity, the first valve port is used for being communicated with the outside, and the second valve port is used for being communicated with the interior of the pump set. The valve element assembly is arranged in the mounting cavity and moves relative to the valve body assembly so as to be switched between a first position and a second position. The valve element assembly is configured in the mode that when the valve element assembly is located at the first position, the mounting cavity is opened, so that ventilation is conducted between the interior of the pump set and the outside through the first valve port, the mounting cavity and the second valve port. And at the second position, the mounting cavity is blocked, so that ventilation between the interior of the pump set and the outside is prevented. The vent valve provided by the embodiment of the utility model simplifies the ventilation and deflation operation of the pump set, so that the operation and maintenance cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pump sets, in particular to a ventilation valve and a pump set. Background Art

[0002] Generally, a pump, as a device for pumping or pressing liquids and gases, is widely used in the field of fluid transportation, such as water pumps, air pumps, oil pumps, etc.

[0003] Among them, when a single-stage centrifugal pump works, the centrifugal force generated by the rotation of the impeller in the pump body driven by the motor is used to transport the liquid. During the working process, the air in the pump body needs to be discharged to ensure normal operation and avoid damage to the mechanical seal. When not working, the water in the pump body needs to be discharged to avoid freezing and cracking of the pump body. In the related art, a gas release component is provided on the pump body, and the operator uses tools to perform operations such as screwing on the gas release component to allow air to enter or empty the pump body.

[0004] However, the above method of allowing air to enter or empty the pump body is cumbersome and inefficient. Summary of the Utility Model

[0005] Based on this, the embodiments of the present utility model provide a ventilation valve and a pump set, which solve the problem of cumbersome and inefficient operation caused by using tools to operate the gas release component on the existing pump set to allow air to enter or empty the pump body.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] In a first aspect, the embodiments of the present utility model provide a ventilation valve for a pump set, the ventilation valve comprising a valve body assembly and a valve core assembly;

[0008] The valve body assembly has an installation cavity, a first valve port and a second valve port, the first valve port and the second valve port are communicated through the installation cavity, the first valve port is used for communicating with the outside, and the second valve port is used for communicating with the inside of the pump set;

[0009] The valve core assembly is arranged in the installation cavity and moves relative to the valve body assembly to switch between a first position and a second position;

[0010] The valve core assembly is configured such that when in the first position, the installation cavity is opened to allow ventilation between the inside of the pump set and the outside through the first valve port, the installation cavity and the second valve port; when in the second position, the installation cavity is blocked to prevent ventilation between the inside of the pump set and the outside.

[0011] In a possible implementation manner, the valve core assembly includes a valve core and an elastic member, the valve core is movably arranged in the installation cavity, and the elastic member is arranged between the valve body assembly and the valve core;

[0012] The elastic member is configured to define a first preset gap between the valve core and the installation cavity when the valve core moves from the first position to the second position to a preset position, and when the sum of the pressure at the first valve port and the elastic force of the elastic member on the valve core is less than the pressure at the second valve port, a preset deformation amount is generated to move the valve core to the second position.

[0013] In a possible implementation manner, one side of the valve core facing the first valve port has a first insertion portion, and the valve body assembly has a second insertion portion, and the first insertion portion is inserted into the second insertion portion.

[0014] In a possible implementation manner, the first insertion portion is an insertion post, the second insertion portion is a jack communicating with the installation cavity, and the insertion post is inserted into the jack.

[0015] In a possible implementation manner, a second preset gap is left between the insertion post and the jack, the first valve port communicates with the jack, and the elastic member is sleeved on the insertion post.

[0016] In a possible implementation manner, the valve core assembly further includes a first seal, and the first seal is sleeved on the valve core;

[0017] The first seal is configured to abut against a part of the inner wall of the installation cavity when the valve core moves to the second position for blocking.

[0018] In a possible implementation manner, there is a part of an inner conical surface in the installation cavity, and the inner diameter of the part of the inner conical surface gradually increases in the direction close to the second valve port;

[0019] When the valve core moves to the second position, the first seal abuts against and seals the part of the inner conical surface.

[0020] In a possible implementation manner, the valve body assembly includes a valve body and a stop member, and the installation cavity, the first valve port and the second valve port are located on the valve body;

[0021] The stop member is connected at the second valve port to limit the valve core assembly in the installation cavity.

[0022] In a possible implementation manner, the stop member has a through hole, and at least one through groove is formed on one side of the valve core facing the stop member;

[0023] When the valve core abuts against the stop member, the fluid between the inside of the pump set and the installation cavity flows through the through hole and the through groove.

[0024] In a second aspect, an embodiment of the present invention further provides a pump set, including a pump body, and any one of the vent valves provided in the first aspect is arranged on the pump body.

[0025] An embodiment of the present utility model provides a ventilation valve and a pump set. The ventilation valve includes a valve body assembly and a valve core assembly. An installation cavity, a first valve port, and a second valve port are provided on the valve body assembly. The first valve port and the second valve port are communicated through the installation cavity. The first valve port is communicated with the outside, and the second valve port is communicated with the inside of the pump set. The valve core assembly is arranged in the installation cavity and moves relative to the valve body assembly to switch between a first position and a second position. When the valve core assembly moves to the first position, the installation cavity is opened, so that the inside of the pump set and the outside are ventilated through the first valve port, the installation cavity, and the second valve port. The air inside the pump set can be discharged to ensure normal subsequent operation. When not working, the air outside can also enter the pump set to discharge the remaining water inside the pump set to avoid freezing and cracking. When the valve core assembly moves to the second position, the installation cavity is blocked to prevent ventilation between the inside of the pump set and the outside, so as to ensure that during the operation of the pump set, the water inside does not drain out from the ventilation valve, thereby simplifying the air venting and bleeding operation of the pump set. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic cross-sectional structure view of the ventilation valve provided by the embodiment of the present utility model;

[0028] Figure 2 is Figure 1 the top view in

[0029] Figure 3 is Figure 1 the schematic structure view of the valve core along the A direction in

[0030] REFERENCE MARKS:

[0031] 100: Valve body assembly;

[0032] 101: Valve body;

[0033] 102: Stopper;

[0034] 1021: Through hole;

[0035] 103: Second seal;

[0036] 110: Installation cavity;

[0037] 111: Partial inner conical surface;

[0038] 120: First valve port;

[0039] 130: Second valve port;

[0040] 140: Second insertion part;

[0041] 200: Spool assembly;

[0042] 210: Spool;

[0043] 211: First insertion part;

[0044] 212: Ring groove;

[0045] 213: Through groove;

[0046] 220: Elastic member;

[0047] 230: First seal. Detailed implementation mode

[0048] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. On the contrary, they are merely examples of methods and devices consistent with some aspects of the present invention as detailed in the appended claims.

[0049] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here, for example, can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0050] As mentioned in the background technology section, when a single-stage centrifugal pump is working, the air in the pump body needs to be discharged to ensure normal operation and avoid damage to the mechanical seal. When not working, the water in the pump body needs to be discharged. At this time, it is necessary to ventilate the pump body to discharge the remaining water inside and prevent the pump body from freezing and cracking. In the related technology, a bleed component, such as a plug, is provided on the pump body. The operator uses a tool to screw the bleed component to allow air to enter or drain the pump body. This operation method is cumbersome and inefficient on the one hand, which leads to an increase in operation and maintenance costs. On the other hand, it is easy to forget, resulting in the pump group not being able to work normally or causing damage to the pump body. This problem needs to be solved urgently.

[0051] In view of the above problems existing in the prior art, the embodiment of the utility model provides a vent valve and a pump set. The vent valve provided by the embodiment of the utility model includes a valve body assembly 100 and a valve core assembly 200. By setting an installation cavity 110, a first valve port 120 and a second valve port 130 on the valve body assembly 100, the first valve port 120 and the second valve port 130 are arranged to communicate through the installation cavity 110, the first valve port 120 is arranged to communicate with the outside, and the second valve port 130 is arranged to communicate with the inside of the pump set. The valve core assembly 200 is arranged in the installation cavity 110 and moved relative to the valve body assembly 100 to switch between the first position S1 and the second position S2. When the valve core assembly 100 moves to the first position S1, the installation cavity 110 is opened to allow ventilation between the interior and the outside of the pump set through the first valve port 120, the installation cavity 110, and the second valve port 130. The air inside the pump set can be discharged to ensure subsequent normal operation. When not working, the outside air can also enter the pump set to discharge the remaining water inside the pump set to prevent freezing and cracking. When the valve core assembly 200 moves to the second position S2, the installation cavity 110 is blocked to prevent ventilation between the interior and the outside of the pump set to ensure that the pump set does not discharge internal water from the vent valve during operation, thereby simplifying the ventilation and deflation operation of the pump set.

[0052] The following specific embodiments are combined with the accompanying drawings to describe the technical solution of the utility model in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0053] First, please refer to Figures 1 to 3 As shown, the vent valve provided in this embodiment is used in a pump group, such as a centrifugal pump. The vent valve includes a valve body assembly 100 and a valve core assembly 200 .

[0054] The valve body assembly 100 has an installation cavity 110, a first valve port 120 and a second valve port 130. The first valve port 120 and the second valve port 130 are connected through the installation cavity 110. The first valve port 120 is used to communicate with the outside, and the second valve port 130 is used to communicate with the inside of the pump group.

[0055] The spool assembly 200 is disposed in the installation cavity 110 and moves relative to the valve body assembly 100 to switch between the first position S1 and the second position S2.

[0056] The spool assembly 200 is configured such that, when in the first position S1, it opens the installation cavity 110 to allow ventilation between the inside of the pump unit and the outside through the first valve port 120, the installation cavity 110, and the second valve port 130. When in the second position S2, it blocks the installation cavity 110 to prevent ventilation between the inside of the pump unit and the outside.

[0057] In this embodiment, the valve body assembly 100 can be of a rotary body structure, a block structure, etc. An installation cavity 110 is provided inside it. One side of the valve body assembly 100 is provided with a first valve port 120, and the other side is provided with a second valve port 130. Both the first valve port 120 and the second valve port 130 communicate with the installation cavity 110. Among them, the first valve port 120 is used to communicate with the outside, and the second valve port 130 is used to communicate with the inside of the pump unit.

[0058] The spool assembly 200 in this embodiment is used to realize the opening and closing of the valve. It can be of a rotary body structure. The spool assembly 200 is disposed in the installation cavity 110 and is in clearance fit with the inside of the installation cavity 110 so that the spool assembly 200 can move between the first position S1 and the second position S2. Among them, the spool assembly 200 can be driven to move by the pressure difference between the first valve port 120 and the second valve port 130, or can also be moved by other driving mechanisms.

[0059] It should be noted that when the pump unit is in the early stage of pumping water, the pressure at the second valve port 130 gradually increases. As long as the spool assembly 200 does not completely block the installation cavity 110, the air inside the pump unit can be discharged at this time. The pump unit can be controlled to run at a low speed first to make the pressure at the second valve port 130 slightly greater than the pressure at the first valve port 120 to ensure that the spool assembly 200 is not blocked. After discharging the internal air, the pump unit can be made to run at a high speed normally to make the pressure at the second valve port 130 much greater than the pressure at the first valve port 120 to ensure that the spool assembly 200 is blocked.

[0060] Specifically, as Figure 1 shown, when this ventilation valve is installed on the pump unit, when the spool assembly 200 moves in the opposite direction of the X-axis in Figure 1 to the first position S1, it opens the installation cavity 110. At least there is a gap between the spool assembly 200 and the inner wall of the installation cavity 110 to allow ventilation between the inside of the pump unit and the outside through the first valve port 120, the installation cavity 110, and the second valve port 130. At this time, the air inside the pump unit can be discharged through the second valve port 130, the installation cavity 110, and the first valve port 120 to ensure normal subsequent operation. When not working, the outside air can also enter the pump unit to discharge the remaining water inside the pump unit to avoid freezing and cracking. When the spool assembly 200 moves alongFigure 1 When moving in the positive direction of the X-axis to the second position S2, the installation cavity 110 is blocked, and the gap between the valve core assembly 200 and the inner wall of the installation cavity 110 is sealed to prevent ventilation between the inside of the pump unit and the outside, so as to ensure that during the operation of the pump unit, the internal water is prevented from being discharged through the ventilation valve.

[0061] Compared with the existing operation of venting by screwing the venting component with a tool, the ventilation valve provided in this embodiment does not require a screwing operation, can simplify the venting operation of the pump unit, and thus can reduce the operation and maintenance cost.

[0062] Therefore, the ventilation valve provided by the embodiment of the present invention includes a valve body assembly 100 and a valve core assembly 200. By providing an installation cavity 110, a first valve port 120, and a second valve port 130 on the valve body assembly 100, it is set that the first valve port 120 and the second valve port 130 are communicated through the installation cavity 110, the first valve port 120 is communicated with the outside, and the second valve port 130 is communicated with the inside of the pump unit. By arranging the valve core assembly 200 in the installation cavity 110 and moving relative to the valve body assembly 100, it is switched between the first position S1 and the second position S2. When the valve core assembly 200 moves to the first position S1, the installation cavity 110 is opened, so that the inside of the pump unit and the outside communicate through the first valve port 120, the installation cavity 110, and the second valve port 130, and the air inside the pump unit can be discharged to ensure normal subsequent operation. When not working, the outside air can also enter the pump unit to discharge the remaining water inside the pump unit and avoid freezing and cracking. When the valve core assembly 200 moves to the second position S2, the installation cavity 110 is blocked to prevent ventilation between the inside of the pump unit and the outside, so as to ensure that during the operation of the pump unit, the internal water is prevented from being discharged through the ventilation valve, thereby simplifying the venting operation of the pump unit.

[0063] In a possible design, the valve core assembly 200 includes a valve core 210 and an elastic member 220. The valve core 210 is movably arranged in the installation cavity 110, and the elastic member 220 is arranged between the valve body assembly 100 and the valve core 210.

[0064] The elastic member 220 is configured such that when the valve core 210 moves from the first position S1 to the second position S2 to a preset position, a first preset gap L1 is defined between the valve core 210 and the installation cavity 110. When the sum of the pressure P1 at the first valve port 120 and the elastic force of the elastic member 220 on the valve core 210 is less than the pressure P2 at the second valve port 130, a preset deformation amount is generated to make the valve core 210 move to the second position S2.

[0065] Specifically, as Figure 1As shown, the elastic member 220 is used to ensure that the valve core 210 is not blocked when the pump unit discharges the internal air at the initial stage of operation. It can be components such as an elastic pad or a spring, and is connected between the valve body assembly 100 and the valve core 210.

[0066] In this way, when the valve core 210 moves from the first position S1 to the second position S2 along the Figure 1 positive direction of the X-axis in the figure to a preset position, the preset position is on the side close to the second position S2. The elastic member 220 defines a first preset gap L1 between the valve core 210 and the installation cavity 110 through elastic force. At this time, the air in the pump unit can be discharged from the second valve port 130, the first preset gap L1, and the first valve port 120, which can ensure that the air inside the pump unit is discharged as much as possible. Since the density or viscosity of water is greater than that of air, after the air inside the pump unit is discharged, it further drives the valve core 210 to move from the preset position to the second position S2. As the pressure P2 at the second valve port 130 increases, when the sum of the pressure P1 at the first valve port 120 and the elastic force of the elastic member 220 on the valve core 210 is less than the pressure P2 at the second valve port 130, a preset deformation amount is generated to make the valve core 210 move to the second position S2. At this time, the valve core 210 is completely sealed with the installation cavity 110 to prevent water from flowing out of the vent valve.

[0067] It should be noted that the elastic member 220 only elastically presses against the valve core 210 and cannot block the connection between the installation cavity 110 and the first valve port 120, that is, at least a gap for the installation cavity 110 to communicate with the first valve port 120 is left on the elastic member 220. Moreover, when the air inside the pump unit is about to be discharged, a small amount of water may flow out from the first valve port 120 at this time. Therefore, during installation, making the first valve port 120 face upward can prevent water from flowing out of the first valve port 120. In addition, the elastic modulus of the elastic member 220 is related to the preset position and the first preset gap L1, so it needs to be designed according to the actual pump unit and is not specifically limited in this embodiment.

[0068] Furthermore, in this embodiment, one side of the valve core 210 facing the first valve port 120 has a first insertion portion 211, and the valve body assembly 100 has a second insertion portion 140, and the first insertion portion 211 is inserted into the second insertion portion 140.

[0069] Specifically, as Figure 1 shown, through the insertion of the first insertion portion 211 into the second insertion portion 140, and the sliding fit between the first insertion portion 211 and the second insertion portion 140, it can provide guidance for the movement of the valve core 210 and ensure the stable movement of the valve core 210.

[0070] In a specific example, the first insertion portion 211 is an insertion post, and the second insertion portion 140 is a jack communicating with the installation cavity 110, and the insertion post is inserted into the jack.

[0071] With such a setting, as Figure 1 shown, the stable movement of the valve core 210 can be ensured through the cooperation of the plug post and the jack.

[0072] Furthermore, in this embodiment, a second preset gap L2 is left between the plug post and the jack. The first valve port 120 is communicated with the jack, and the elastic member 220 is sleeved on the plug post 211.

[0073] In this way, as Figure 1 shown, air can be ventilated between the first valve port 120 and the jack, and the structure is more compact. Among them, a gap should be left between the elastic member 220 and the plug post 211 to avoid blocking between the first valve port 120 and the jack.

[0074] In another specific example, not shown in the figure, the first plugging portion 211 can also be a jack. Correspondingly, the second plugging portion 140 can be a plug post matching the jack. In this way, the plugging of the plug post and the jack can also be achieved. In this regard, no excessive limitation is made in this embodiment.

[0075] In some embodiments, the valve core assembly 200 further includes a first seal 230, and the first seal 230 is sleeved on the valve core 210.

[0076] The first seal 230 is configured to abut against a part of the inner wall of the installation cavity 110 when the valve core 210 moves to the second position S2 for plugging.

[0077] Specifically, as Figure 1 shown, the first seal 230 is a sealing ring, a gasket, etc. The first seal 230 can be fixed on the periphery of the valve core 210 by means of clamping, bonding, etc. When the valve core 210 moves to the second position S2, the first seal 230 is attached to the inner wall of the installation cavity 110 by using the elasticity of the first seal 230 for sealing. Among them, the type, size, etc. of the first seal 230 can be determined according to the valve core 210, and no specific limitation is made in this embodiment.

[0078] In addition, an annular groove 212 can be opened on the periphery of the valve core 210, and then the first seal 230 is clamped in the annular groove 212 to ensure the stable connection of the first seal 230. The installation structure is simple and convenient for disassembly, replacement, etc.

[0079] Furthermore, in this embodiment, a part of the inner conical surface 111 is provided in the installation cavity 110, and the inner diameter of the part of the inner conical surface 111 gradually increases in the direction close to the second valve port 130.

[0080] When the valve core 210 moves to the second position S2, the first seal 230 abuts against and seals the part of the inner conical surface 111.

[0081] Specifically, as Figure 1 shown, the inner diameter of the partial inner conical surface 111 gradually increases along the Figure 1 opposite direction of the X-axis in [[0000183]]. With such a setting, the first seal 230 is in contact with the partial inner conical surface 111 for sealing, which can better ensure the sealing performance. Even if the first seal 230 is deformed after long-term use, it can easily seal with the conical surface.

[0082] Among them, for parameters such as the length and taper of the partial inner conical surface 111, they can be determined according to actual needs and are not specifically limited in this embodiment.

[0083] In some embodiments, the valve body assembly 100 includes a valve body 101 and a stopper 102. The installation cavity 110, the first valve port 120, and the second valve port 130 are located on the valve body 101.

[0084] The stopper 102 is connected to the second valve port 130 to limit the spool assembly 200 in the installation cavity 110.

[0085] Specifically, as Figure 1 shown, the valve body 101 can be a rotary body structure, a block structure, etc. The installation cavity 110, the first valve port 120, and the second valve port 130 are located on the valve body 101.

[0086] The stopper 102 is used to limit the spool 210. It can be a ring-shaped, block-shaped, columnar, etc. structure. The stopper 102 is located at the second valve port 130 and can be connected to the valve body 101 by screwing, clamping, welding, etc., so as to ensure that the spool 210 moves in the installation cavity 110 without falling off.

[0087] It should be noted that the stopper 102 can also be replaced by other types of components, as long as it can limit the spool 210 without blocking the second valve port 130. In this regard, there are no excessive restrictions in this embodiment.

[0088] Furthermore, in this embodiment, the stopper 102 has a through hole 1021, and at least one through groove 213 is provided on the side of the spool 210 facing the stopper 102.

[0089] When the spool 210 abuts against the stopper 102, the fluid between the inside of the pump group and the installation cavity 110 flows through the through hole 1021 and the through groove 213.

[0090] With such a setting, as Figure 1 、 Figure 3As shown, when the valve core 210 abuts against the stopper 102, air or water between the interior of the pump unit and the installation cavity 110 can still flow through the through hole 1021 and the through groove 213, avoiding the situation of being blocked at the first position S1. The specific number of the through grooves 213 can be determined according to actual requirements and is not specifically limited in this embodiment.

[0091] In addition, the valve body assembly 100 may further include a second seal 103. As Figure 1 , Figure 2 shown, the second seal 103 may be an O-ring, a gasket, etc., which is sleeved on the valve body 101 for sealing between the valve body 101 and the pump unit.

[0092] In a second aspect, an embodiment of the present utility model further provides a pump unit, including a pump body, and the above-mentioned vent valve provided in any of the above embodiments is arranged on the pump body.

[0093] Among them, the structure of the vent valve has been described in detail in the above embodiments and will not be elaborated here one by one.

[0094] It can be understood that the interior of the pump body has a cavity, a rotatable impeller is arranged in the cavity, and the pump body is further provided with a water inlet and a water outlet. When the impeller rotates, water can be pumped into the pump body from the water inlet and then pumped out from the water outlet. The pump body is also provided with an insertion installation hole, the installation hole communicates with the cavity, the vent valve is inserted into the installation hole, and can be connected to the pump body by means of screwing, clamping, welding, etc., so as to vent the cavity of the pump body.

[0095] Among them, the pump unit is a centrifugal pump. The specific size, model, etc. between the pump body and the vent valve can be determined according to actual requirements and are not specifically limited in this embodiment.

[0096] The pump unit provided by the embodiment of the present utility model is provided with a ventilation valve, which includes a valve body assembly 100 and a valve core assembly 200. By providing an installation cavity 110, a first valve port 120 and a second valve port 130 on the valve body assembly 100, it is set that the first valve port 120 and the second valve port 130 are communicated through the installation cavity 110, the first valve port 120 is communicated with the outside, and the second valve port 130 is communicated with the inside of the pump unit. By arranging the valve core assembly 200 in the installation cavity 110 and moving it relative to the valve body assembly 100, it can be switched between a first position S1 and a second position S2. When the valve core assembly 200 moves to the first position S1, the installation cavity 110 is opened, so that the inside of the pump unit and the outside are ventilated through the first valve port 120, the installation cavity 110, and the second valve port 130. The air inside the pump unit can be discharged to ensure normal subsequent operation. When not working, the air outside can also enter the pump unit to discharge the remaining water inside the pump unit to avoid freezing and cracking. When the valve core assembly 200 moves to the second position S2, the installation cavity 110 is blocked to prevent ventilation between the inside of the pump unit and the outside, so as to ensure that during the operation of the pump unit, the water inside does not drain out from the ventilation valve, thereby simplifying the air venting and deflation operation of the pump unit.

[0097] After considering the specification and practicing the disclosed utility model herein, those skilled in the art will readily conceive of other embodiments of the present utility model. The present utility model is intended to cover any variations, uses, or adaptations of the present utility model, which follow the general principles of the present utility model and include the well-known common general knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present utility model are pointed out by the claims.

[0098] It should be understood that the present utility model is not limited to the precise structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A vent valve for a pump set, characterized in that: The vent valve comprises a valve body assembly and a valve core assembly; The valve body assembly has an installation cavity, a first valve port and a second valve port, the first valve port and the second valve port are connected through the installation cavity, the first valve port is used to communicate with the outside, and the second valve port is used to communicate with the inside of the pump group; The valve core assembly is disposed in the mounting cavity and moves relative to the valve body assembly to switch between a first position and a second position; The valve core assembly is configured to, when in the first position, open the installation cavity to allow ventilation between the interior of the pump group and the outside through the first valve port, the installation cavity, and the second valve port; and when in the second position, block the installation cavity to prevent ventilation between the interior of the pump group and the outside.

2. The vent valve according to claim 1, characterized in that The valve core assembly comprises a valve core and an elastic member, the valve core is movably arranged in the installation cavity, and the elastic member is arranged between the valve body assembly and the valve core; The elastic member is configured to define a first preset gap between the valve core and the mounting cavity when the valve core moves from the first position to the second position to a preset position, and to generate a preset deformation amount to move the valve core to the second position when the sum of the pressure at the first valve port and the elastic force of the elastic member on the valve core is less than the pressure at the second valve port.

3. The vent valve according to claim 2, characterized in that: A first plug-in portion is provided on the valve core at a side facing the first valve port, and a second plug-in portion is provided on the valve body assembly, and the first plug-in portion is plugged with the second plug-in portion.

4. The vent valve according to claim 3, characterized in that: The first plug-in portion is a plug-in column, the second plug-in portion is a plug-in hole communicated with the installation cavity, and the plug-in column is plugged into the plug-in hole.

5. The vent valve according to claim 4, characterized in that A second preset gap is left between the plug-in column and the plug hole, the first valve port is communicated with the plug hole, and the elastic member is sleeved on the plug-in column.

6. The vent valve according to claim 2, characterized in that: The valve core assembly further comprises a first sealing member, wherein the first sealing member is sleeved on the valve core; The first sealing member is configured to abut against a portion of the inner wall of the installation cavity to perform sealing when the valve core moves to the second position.

7. The vent valve according to claim 6, characterized in that The installation cavity has a partial inner conical surface, and the inner diameter of the partial inner conical surface gradually increases toward the direction close to the second valve port; When the valve core moves to the second position, the first sealing member abuts against and seals against the portion of the inner conical surface.

8. The vent valve according to any one of claims 2 to 7, characterized in that: The valve body assembly comprises a valve body and a stopper, and the mounting cavity, the first valve port and the second valve port are located on the valve body; The stopper is connected at the second valve port to limit the valve core assembly in the installation cavity.

9. The vent valve according to claim 8, characterized in that The stopper is provided with a through hole, and the valve core is provided with at least one through groove on a side facing the stopper; When the valve core abuts against the stopper, the fluid between the interior of the pump assembly and the installation cavity flows through the through hole and the through groove.

10. A pump set, characterized in that: The invention comprises a pump body, on which the ventilation valve according to any one of claims 1 to 9 is arranged.

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