Ball valve with non-return function

Abstract

The utility model belongs to the technical field of valves, and relates to a ball valve with a non-return function, which comprises a valve body, the valve body is provided with a water inlet, a water outlet and a channel positioned between the water inlet and the water outlet, the water inlet and the water outlet are both communicated with the channel, and a spherical valve core for adjusting liquid flow in the channel is movably arranged in the channel. A check valve assembly is further arranged in the channel, located between the spherical valve element and the water inlet and used for preventing liquid in the channel from flowing back to the water inlet. The check valve assembly is arranged in the channel of the valve body, leakage points are reduced, the leakage risk is reduced, the sealing reliability in a water pump system is improved, the integrated design is adopted, the occupied space is small, installation and maintenance are easy and convenient, and the production cost and the maintenance cost are reduced.

Description

Technical Field

[0001] This application belongs to the technical field of valves and relates to a ball valve with a check function. Background Art

[0002] A centrifugal pump works by using the rotation of an impeller to cause centrifugal motion of water. Before starting the pump, the pump casing and the suction pipe must be filled with water, and then the motor is started, causing the pump shaft to drive the impeller and water to rotate at a high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pressure water pipeline of the pump through the flow channel of the volute pump casing.

[0003] In a centrifugal pump system, ball valves and check valves are usually used. The ball valve and the check valve are connected by a joint to control the flow rate and prevent liquid backflow.

[0004] However, in the way of connecting the ball valve and the check valve by a joint, the connection part of the joint is prone to leakage, reducing the sealing reliability of the overall system. Utility Model Content

[0005] In order to reduce the leakage risk in the water pump system, this application provides a ball valve with a check function.

[0006] The ball valve with a check function provided by this application adopts the following technical solutions:

[0007] A ball valve with a check function includes a valve body. The valve body is provided with a water inlet, a water outlet, and a channel located between the water inlet and the water outlet. Both the water inlet and the water outlet are communicated with the channel. A spherical valve core for adjusting the liquid flow rate in the channel is movably arranged in the channel. A check valve assembly is also arranged in the channel. The check valve assembly is located between the spherical valve core and the water inlet and is used to block the reverse flow of the liquid in the channel to the water inlet.

[0008] By adopting the above technical solutions, the ball valve can adjust the liquid flow rate in the channel by driving the spherical valve core. The design of the check valve assembly can prevent the liquid in the channel from flowing back to the water inlet. The check valve assembly is arranged in the channel of the valve body, reducing the leakage points, reducing the leakage risk, improving the sealing reliability in the water pump system, and with an integrated design, occupying less space, being simple to install and maintain, and reducing the production cost and maintenance cost.

[0009] Preferably, quick-connect chucks are arranged at both the water inlet and the water outlet of the valve body, and sealing grooves are arranged on the disc surfaces of the quick-connect chucks.

[0010] By adopting the above technical solutions, quick-connect chucks are arranged at both the water inlet and the water outlet of the valve body, which can improve the disassembly and assembly efficiency.

[0011] Preferably, mounting holes for installing external components are arranged on the outer wall of the valve body.

[0012] By adopting the above technical solution, the valve body is provided with a mounting hole, which facilitates the installation of external components such as sensors, and there is no need to drill holes in the pipeline of the water pump system or add pipelines containing sensors separately.

[0013] Preferably, the check valve assembly includes a check valve core, a mounting bracket, a mounting seat, a sealing seat and an elastic member. The mounting seat is arranged on the inner wall of the channel, the sealing seat is arranged on the mounting seat, the mounting bracket is detachably connected to the inner wall of the channel and / or the mounting seat, the check valve core is arranged on the mounting bracket and can move along the central line direction of the channel, and the elastic member is arranged between the check valve core and the mounting bracket to provide a thrust force for the check valve core to abut against the sealing seat to form a seal.

[0014] By adopting the above technical solution, when the ball valve is opened, the liquid flows from the water inlet of the valve body to the water outlet, and the pressure of the liquid can push the check valve core away from the sealing seat; when the ball valve is closed, the check valve core is reset under the action of the elastic member and seals with the sealing seat to prevent the liquid in the pipeline from flowing back to the water inlet of the valve body.

[0015] Preferably, the mounting bracket is snap-connected to the mounting seat, a clamping groove is formed on the inner wall of the channel, and the mounting bracket is provided with a convex platform that is snap-connected to the clamping groove.

[0016] By adopting the above technical solution, the mounting bracket is installed on the inner wall of the channel through the cooperation of the convex platform and the clamping groove, realizing the connection with the valve body and reducing the damage to the valve body during maintenance.

[0017] Preferably, the mounting bracket is provided with a guiding hole along the central line direction of the channel. The check valve core includes a valve core body and a guiding rod, the guiding rod is slidably connected to the guiding hole, and the valve core body is fixedly connected to the guiding rod.

[0018] By adopting the above technical solution, the valve core body is matched with the guiding hole of the mounting bracket through the guiding rod, improving the accuracy of the movement of the check valve core and the fitting degree when sealing with the sealing seat.

[0019] Preferably, the mounting bracket has a guiding tube, the guiding hole is opened at the center of the guiding tube, the elastic member includes a compression spring, the compression spring is sleeved on the guiding tube, one end of the compression spring abuts against the mounting bracket, and the other end of the compression spring abuts against the check valve core.

[0020] By adopting the above technical solution, the guiding tube is designed to increase the guiding area that can be contacted between the guiding hole and the guiding rod, improving the accuracy of the movement of the check valve core, and the compression spring can provide a thrust force for the check valve core to abut against the sealing seat.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The check valve assembly is arranged in the channel of the valve body, reducing the leakage points, lowering the leakage risk, and improving the sealing reliability in the water pump system;

[0023] 2. The integrated design occupies less space, is simple to install and maintain, and reduces the production cost and maintenance cost;

[0024] 3. Quick - fitting chucks are arranged at both the water inlet and the water outlet of the valve body, which can improve the disassembly and assembly efficiency;

[0025] 4. The mounting bracket is installed on the inner wall of the channel through the cooperation of the boss and the clamping groove, realizing the connection with the valve body and reducing the damage to the valve body during maintenance. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of an embodiment of the present application.

[0027] Figure 2 is a cross - sectional view when the ball valve of the embodiment of the present application is closed.

[0028] Figure 3 is a cross - sectional view when the ball valve of the embodiment of the present application is opened.

[0029] Description of the Reference Numerals: 1, valve body; 11, water inlet; 12, water outlet; 13, channel; 14, quick - fitting chuck; 141, sealing groove; 15, mounting hole; 16, clamping groove; 21, spherical valve core; 211, linear through - hole; 22, valve stem; 23, handle; 3, check valve assembly; 31, check valve core; 311, valve core body; 312, guide rod; 313, guide tube; 32, mounting bracket; 321, boss; 322, guide hole; 33, mounting seat; 34, sealing seat; 35, elastic member. Detailed Description of the Embodiment

[0030] The following further elaborates on the present application in conjunction with the attached Figures 1-3 drawings.

[0031] As Figure 1 , Figure 2 shown, the ball valve includes a valve body 1. The valve body 1 is provided with a water inlet 11, a water outlet 12, and a channel 13 located between the water inlet 11 and the water outlet 12. Both the water inlet 11 and the water outlet 12 are communicated with the channel 13.

[0032] In this embodiment, the water inlet 11 and the water outlet 12 are coaxial, and the channel 13 is also linear.

[0033] As another solution, the water inlet 11 and the water outlet 12 may also be arranged non-coaxially, such as vertically distributed, and the shape of the channel 13 may also be adaptively changed.

[0034] Preferably, quick-release chucks 14 are provided at both the water inlet 11 and the water outlet 12 of the valve body 1. Sealing grooves 141 are provided on the disc surfaces of the quick-release chucks 14 to improve the disassembly and assembly efficiency.

[0035] Installation holes 15 for installing external components are provided on the outer wall of the valve body 1. The installation holes 15 are threaded and communicate with the channel 13 of the valve body 1, which facilitates the installation of external components such as sensors without the need to drill additional holes in the pipeline of the water pump system or add pipelines containing sensors.

[0036] Such as Figure 1 , Figure 2 As shown, a spherical valve core 21 for adjusting the liquid flow rate in the channel 13 is movably arranged in the channel 13.

[0037] Specifically, a sealing portion cooperating with the spherical valve core 21 is also provided in the channel 13. The spherical valve core 21 is connected to a valve rod 22. The outer end of the valve rod 22 extends outside the valve body 1 and is connected to a handle 23.

[0038] Preferably, the spherical valve core 21 is provided with a linear through hole 211 for liquid to pass through. When the handle 23 swings 90 degrees, the spherical valve core 21 can be driven to rotate 90 degrees to achieve the adjustment of the liquid flow rate and the on / off of the liquid in the channel 13.

[0039] Such as Figure 2 , Figure 3 As shown, a check valve assembly 3 is also provided in the channel 13. The check valve assembly 3 is located between the spherical valve core 21 and the water inlet 11 and is used to block the reverse flow of the liquid in the channel 13 to the water inlet 11.

[0040] In this embodiment, the check valve assembly 3 includes a check valve core 31, an installation bracket 32, an installation seat 33, a sealing seat 34 and an elastic member 35. The installation seat 33 is arranged on the inner wall of the channel 13. Preferably, the installation seat 33 is annular. An annular protrusion is provided on the inner wall of the channel 13. One end of the installation seat 33 close to the water inlet 11 abuts against the annular protrusion. The sealing seat 34 is arranged on the installation seat 33. In this embodiment, the installation seat 33 is also annular and is arranged on the shoulder on the inner wall of the installation seat 33. The installation bracket 32 is detachably connected to the inner wall of the channel 13 and / or the installation seat 33.

[0041] Preferably, the mounting bracket 32 is snap-connected to the mounting seat 33. For example, corresponding grooves are provided on both the mounting bracket 32 and the mounting seat 33 for snap connection. A clamping groove 16 is formed on the inner wall of the channel 13, and the mounting bracket 32 is provided with a boss 321 that is snap-connected to the clamping groove 16. The mounting bracket 32 is connected to the valve body 1 through the cooperation of the boss 321 and the clamping groove 16, reducing the damage to the valve body 1 during maintenance.

[0042] As Figure 2 , Figure 3 shown, the check valve core 31 is arranged on the mounting bracket 32 and can move along the central line direction of the channel 13. An elastic member 35 is arranged between the check valve core 31 and the mounting bracket 32 to provide a thrust force to the check valve core 31 so as to abut against the sealing seat 34 to form a seal.

[0043] Preferably, the mounting bracket 32 is provided with a guiding hole 322 along the central line direction of the channel 13. The check valve core 31 includes a valve core body 311 and a guiding rod 312. The guiding rod 312 is slidably connected to the guiding hole 322, and the valve core body 311 is fixedly connected to the guiding rod 312.

[0044] Specifically, the mounting bracket 32 has a guiding tube 313, the guiding hole 322 is opened at the center of the guiding tube 313. The elastic member 35 includes a compression spring, the compression spring is sleeved on the guiding tube 313, one end of the compression spring abuts against the mounting bracket 32, and the other end of the compression spring abuts against the check valve core 31. The compression spring can provide a thrust force to the check valve core 31 to abut against the sealing seat 34.

[0045] The working principle of this embodiment is as follows:

[0046] As Figure 2 shown, when the ball valve is closed, the check valve core 31 is reset under the action of the elastic member 35 and seals with the sealing seat 34, preventing the liquid in the pipeline from flowing back to the water inlet 11 of the valve body 1.

[0047] As Figure 3 shown, when the ball valve is opened, the liquid flows from the water inlet 11 of the valve body 1 to the water outlet 12, and the pressure of the liquid can push the check valve core 31 away from the sealing seat 34;

[0048] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A ball valve with a check function, characterized in that: The invention comprises a valve body (1), wherein the valve body (1) is provided with a water inlet (11), a water outlet (12) and a channel (13) located between the water inlet (11) and the water outlet (12); the water inlet (11) and the water outlet (12) are both connected to the channel (13); a spherical valve core (21) is movably arranged in the channel (13) for adjusting the flow rate of liquid in the channel (13); a check valve assembly (3) is also arranged in the channel (13); the check valve assembly (3) is located between the spherical valve core (21) and the water inlet (11) and is used to block the liquid in the channel (13) from flowing back to the water inlet (11).

2. The ball valve with a check function according to claim 1, characterized in that: A quick-release chuck (14) is provided at the water inlet (11) and the water outlet (12) of the valve body (1), and a sealing groove (141) is provided on the disk surface of the quick-release chuck (14).

3. The ball valve with a check function according to claim 1, characterized in that: The outer wall of the valve body (1) is provided with a mounting hole (15) for mounting external components.

4. The ball valve with a check function according to claim 1, 2 or 3, characterized in that: The check valve assembly (3) comprises a check valve core (31), a mounting bracket (32), a mounting seat (33), a sealing seat (34) and an elastic member (35); the mounting seat (33) is arranged on the inner wall of the channel (13); the sealing seat (34) is arranged on the mounting seat (33); the mounting bracket (32) is detachably connected to the inner wall of the channel (13) and / or the mounting seat (33); the check valve core (31) is arranged on the mounting bracket (32) and is movable along the center line direction of the channel (13); the elastic member (35) is arranged between the check valve core (31) and the mounting bracket (32) to provide a thrust to the check valve core (31) that can abut against the sealing seat (34) to form a seal.

5. The ball valve with a check function according to claim 4, characterized in that: The mounting bracket (32) is snap-fitted with the mounting seat (33); a snap-fitting groove (16) is provided on the inner wall of the channel (13); and the mounting bracket (32) is provided with a boss (321) snap-fitted with the snap-fitting groove (16).

6. The ball valve with a check function according to claim 4, characterized in that: The mounting bracket (32) is provided with a guide hole (322) along the center line direction of the channel (13); the check valve core (31) comprises a valve core body (311) and a guide rod (312); the guide rod (312) is slidably connected to the guide hole (322); and the valve core body (311) is fixedly connected to the guide rod (312).

7. The ball valve with a check function according to claim 6, characterized in that: The mounting bracket (32) has a guide tube (313), the guide hole (322) is opened at the center of the guide tube (313), the elastic member (35) includes a compression spring, the compression spring is sleeved on the guide tube (313), one end of the compression spring abuts against the mounting bracket (32), and the other end of the compression spring abuts against the check valve core (31).

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