Low-resistance anti-backflow check valve

Abstract

The utility model discloses a low-resistance anti-backflow check valve which comprises a valve body, a water outlet is formed in one end of the valve body, a water inlet is formed in the other end of the valve body, a cylindrical valve element is arranged in the end, close to the water inlet, of the valve body, a threaded rod is arranged at the upper end of the cylindrical valve element, and a connecting plate is arranged in the valve body. A spherical valve element is arranged on one side of the connecting plate, fixing supports are fixedly connected to the positions, close to the two sides, of the upper surface of the connecting plate, screw rods are arranged in the fixing supports in a sleeved mode, first springs are arranged on the outer sides of the screw rods in a sleeved mode, connecting pieces are arranged on the outer sides of the fixing supports and fixedly connected with the screw rods, and connecting rods are fixedly connected to the upper surfaces of the connecting pieces. A cylinder is fixedly connected to the outer surface above the valve body. According to the check valve, the moving piece, the sliding rod and the second spring are matched with one another, the cover plate can be rapidly detached, then the interior of the valve body can be inspected, and the situation that the check valve cannot be rapidly replaced due to internal damage or the reverse sealing effect is poor after the check valve is used for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a low-resistance and anti-backflow check valve. Background Art

[0002] A one-way valve is a valve that allows fluid to flow only along the inlet, but not back through the outlet. It is commonly known as a check valve. A one-way valve is also called a non-return valve or a non-return valve. It is used in hydraulic systems to prevent oil from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction.

[0003] Existing one-way valves usually install the valve core inside the valve body, and prevent backflow through the cooperation between water flow and the spring on the valve core. When the one-way valve is used for a long time, the reverse sealing effect will be poor, or the internal damage will occur, making the one-way valve unusable, and the internal structure of the one-way valve cannot be quickly inspected or replaced. Therefore, it is urgent to design a low-resistance anti-backflow one-way valve to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a low-resistance and anti-backflow check valve to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A low-resistance and anti-backflow check valve comprises a valve body, one end of the valve body is provided with a water outlet, and the other end of the valve body is provided with a water inlet, a cylindrical valve core is arranged inside the end of the valve body close to the water inlet, and a threaded rod is arranged on the upper end of the cylindrical valve core, a connecting plate is arranged inside the valve body, and a spherical valve core is arranged on one side of the connecting plate, the upper surface of the connecting plate is fixedly connected with fixed supports near both sides, a screw is sleeved inside the fixed support, and a first spring is sleeved outside the screw, a connecting piece is arranged outside the fixed support, and the connecting piece is fixedly connected to the screw, a connecting rod is fixedly connected to the upper surface of the connecting piece, a cylinder is fixedly connected to the upper outer surface of the valve body, and a circular groove is arranged inside the cylinder, a sealing piece is arranged inside the circular groove, and a cover plate is arranged above the sealing piece.

[0007] Preferably, the sealing member is sleeved on the connecting rod, and a circular sealing member is arranged above the sealing member.

[0008] Preferably, the cover plate is provided with two square grooves, the two square grooves are slidably connected with moving parts inside, a sliding rod is fixedly connected to one side of the moving part, and a baffle is fixedly connected to the outer surface of one end of the sliding rod away from the moving part.

[0009] Preferably, two guide grooves are provided on the inner wall of the cylinder, and limiting holes are provided inside the two guide grooves.

[0010] Preferably, circular holes are provided on the cover plate at positions corresponding to the slide rod, and a second spring is sleeved on the outer side of the slide rod.

[0011] Preferably, a threaded hole matched with the threaded rod is provided on the valve body, and a handle is fixedly connected to the upper surface of the threaded rod.

[0012] In the above technical solution, the utility model provides a low-resistance anti-backflow check valve, which has the following beneficial effects:

[0013] (1) The cover plate can be quickly disassembled through the cooperation of the moving part, the slide rod and the second spring, and then the inside of the valve body can be inspected, which avoids the situation that the check valve is damaged and cannot be quickly replaced or the reverse sealing effect is poor after a long period of use.

[0014] (2) The flow rate can be controlled by the handle and the cylindrical valve core, thereby adjusting the flow rate of the fluid. At the same time, the valve body can be manually closed. It has various functions and a wide range of applications.

[0015] (3) A groove matching the spherical valve core is provided on the first step inside the valve body, and a sealing ring is arranged in the groove, thereby enhancing the stability of the fluid flow process and the reliability of reverse flow resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The utility model provides a three-dimensional schematic diagram of the overall structure of a low-resistance and anti-backflow check valve embodiment.

[0018] Figure 2 The utility model provides an overall cross-sectional structural schematic diagram of a low-resistance and anti-backflow check valve embodiment.

[0019] Figure 3 A three-dimensional schematic diagram of a first spring structure provided in an embodiment of a low-resistance and anti-backflow check valve of the utility model.

[0020] Figure 4 The utility model provides a low-resistance and anti-backflow check valve embodiment of the present invention, which shows an exploded schematic diagram of the internal structure of the cylinder.

[0021] 1 valve body, 2 water outlet, 3 water inlet, 4 cylindrical valve core, 5 threaded rod, 6 handle, 7 spherical valve core, 8 connecting plate, 9 fixed support, 10 screw, 11 first spring, 12 connecting part, 13 connecting rod, 14 circular groove, 15 sealing part, 16 circular sealing part, 17 cover plate, 18 square groove, 19 second spring, 20 moving part, 21 sliding rod, 22 guide groove, 23 limiting hole, 24 baffle. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-4 As shown, a low-resistance and anti-backflow check valve provided by an embodiment of the utility model comprises a valve body 1, a water outlet 2 is provided at one end of the valve body 1, and a water inlet 3 is provided at the other end of the valve body 1, a cylindrical valve core 4 is arranged inside the end of the valve body 1 close to the water inlet, and a threaded rod 5 is arranged on the upper end of the cylindrical valve core 4, a connecting plate 8 is arranged inside the valve body 1, and a spherical valve core 7 is arranged on one side of the connecting plate 8, fixed supports 9 are fixedly connected to the upper surface of the connecting plate 8 near both sides, a screw 10 is sleeved inside the fixed support 9, and a first spring 11 is sleeved outside the screw 10, a connecting piece 12 is arranged outside the fixed support 9, and the connecting piece 12 is fixedly connected to the screw 10, a connecting rod 13 is fixedly connected to the upper surface of the connecting piece 12, a cylinder 25 is fixedly connected to the upper outer surface of the valve body 1, a circular groove 14 is provided inside the cylinder 25, a sealing piece 15 is arranged inside the circular groove 14, and a cover plate 17 is arranged above the sealing piece 15.

[0024] Specifically, in this embodiment, it includes a valve body 1, a water outlet 2 is provided at one end of the valve body 1, and a water inlet 3 is provided at the other end of the valve body 1, the water inlet 3 is used for the entry of fluid, and the water outlet 2 is used for the discharge of fluid, a cylindrical valve core 4 is arranged inside the end of the valve body 1 close to the water inlet, and a threaded rod 5 is arranged on the upper end of the cylindrical valve core 4, and the valve body 1 can be manually opened or closed by cooperating between the cylindrical valve core 4 and the threaded rod 5, a connecting plate 8 is arranged inside the valve body 1, and a spherical valve core 7 is arranged on one side of the connecting plate 8, the spherical valve core 7 is fixedly connected to the connecting plate 8 through a cylindrical connecting piece, and the spherical valve core 7 and the connecting plate 8 can be detached from each other, and a fixed support 9 is fixedly connected to the upper surface of the connecting plate 8 near both sides, a screw 10 is sleeved inside the fixed support 9, and a first spring 11 is sleeved on the outer side of the screw 10, one end of the first spring 11 is fixedly connected to the screw 10, and the other end extends It extends to one side of the connecting plate 8, and the fluid enters the valve body through the water inlet 3, so that the spherical valve core 7 can drive the connecting plate 8 to rotate around the screw 10. When the fluid stops entering, the spherical valve core 7 will close the fluid channel under the elastic force of the first spring 11 to prevent the fluid from flowing back. A connecting piece 12 is arranged on the outside of the fixed support 9, and the connecting piece 12 is fixedly connected to the screw 10. A connecting rod 13 is fixedly connected to the upper surface of the connecting piece 12. A cylinder 25 is fixedly connected to the outer surface of the valve body 1, and a circular groove 14 is opened inside the cylinder 25. A sealing piece 15 is arranged inside the circular groove 14, and a cover plate 17 is arranged above the sealing piece 15. The sealing piece 15 plays a sealing role. The cover plate 17 is snap-connected with the cylinder 25 for easy disassembly, so that the inside of the valve body 1 can be inspected, which avoids the internal damage of the check valve and the inability to quickly replace it or the poor reverse sealing effect due to long-term use.

[0025] The utility model provides a low-resistance and anti-backflow check valve. Through the cooperation of the moving part 20, the slide rod 21 and the second spring 19, the cover plate 17 can be quickly disassembled, and then the inside of the valve body 1 can be checked, thereby avoiding the check valve from being damaged inside and unable to be quickly replaced or having a poor reverse sealing effect after being used for a long time.

[0026] In an embodiment provided by the utility model, a seal 15 is sleeved on the connecting rod 13, and a circular seal 16 is arranged above the seal 15. The circular seal 16 can seal the gap between the seal and the connecting rod 13, and the seal 15 can seal the circular groove 14 to prevent the valve body 1 from leaking.

[0027] In another embodiment provided by the utility model, two square grooves 18 are provided on the cover plate 17, and moving parts 20 are slidably connected inside the two square grooves 18. A through groove is provided inside the square grooves 18, and the moving part 20 is in a T-shaped structure. A sliding rod 21 is fixedly connected to one side of the moving part 20, and a baffle 24 is fixedly connected to the outer surface of one end of the sliding rod 21 away from the moving part 20. The movement of the moving part 20 can drive the sliding rod 21 to move.

[0028] In another embodiment provided by the utility model, two guide grooves 22 are provided on the inner wall of the cylinder 25, and limiting holes 23 are provided inside the two guide grooves 22. Guide members are provided on both sides of the seal 15. The guide members cooperate with the guide grooves 22 and are inserted into the cylinder 25. The slide rod 21 can also move inside the guide grooves 22, and the limiting holes 23 are used to limit the slide rod 21.

[0029] In an embodiment provided by the utility model, circular holes are provided on the cover plate 17 at positions corresponding to the slide rod 21, and a second spring 19 is sleeved on the outer side of the slide rod 21. Two second springs 19 are provided, one end of the second spring 19 is fixedly connected to the cover plate 17 and is concentric with the circular hole provided on the cover plate 17, and the other end of the second spring is in contact with the baffle 24.

[0030] In another embodiment provided by the utility model, a threaded hole matched with the threaded rod 5 is opened on the valve body 1, and a handle 6 is fixedly connected to the upper surface of the threaded rod 5. By rotating the handle 6 to make the threaded rod 5 match with the threaded hole matched with the valve body 1, the water flow rate can be adjusted, and the check valve can also be manually closed.

[0031] Working principle: the fluid enters the flow channel inside the valve body 1 through the water inlet 3, and the handle 6 cooperates with the threaded rod 5 to adjust the position of the cylindrical valve core 4 inside the valve body 1, so that the flow rate can be adjusted. The water flowing through the valve body 1 can push the spherical valve core 7, so that the spherical valve core 7 drives the connecting plate 8 to rotate around the screw 10, and then the water flows out through the water outlet 2. When the water stops entering, the elastic force of the first spring 11 can make the spherical valve core 7 fit with the first step, thereby closing the channel to avoid backflow. The sliding rod 21 can be moved by manually moving the moving part 20 to disengage from the limiting hole 23, and then the second spring 19 cooperates with the baffle 24 to quickly disassemble and install the cover plate 17, so that the inside of the valve body 1 can be inspected, and the internal structure can be quickly replaced, which can effectively avoid waste of resources.

[0032] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A low-resistance anti-backflow check valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a water outlet (2) at one end, and a water inlet (3) at the other end. A cylindrical valve core (4) is provided inside the valve body (1) near the water inlet, and a threaded rod (5) is provided at the upper end of the cylindrical valve core (4). A connecting plate (8) is provided inside the valve body (1), and a spherical valve core (7) is provided on one side of the connecting plate (8). The upper surface of the connecting plate (8) is fixedly connected to fixed supports (9) near both sides, and a screw rod (10) is sleeved inside the fixed support (9). ), and a first spring (11) is sleeved on the outer side of the screw (10), a connecting piece (12) is arranged on the outer side of the fixed support (9), and the connecting piece (12) is fixedly connected to the screw (10), a connecting rod (13) is fixedly connected to the upper surface of the connecting piece (12), a cylinder (25) is fixedly connected to the upper outer surface of the valve body (1), and a circular groove (14) is opened inside the cylinder (25), a sealing piece (15) is arranged inside the circular groove (14), and a cover plate (17) is arranged above the sealing piece (15).

2. A low resistance and anti-backflow check valve according to claim 1, characterized in that: The sealing member (15) is sleeved on the connecting rod (13), and a circular sealing member (16) is arranged above the sealing member (15).

3. A low resistance and anti-backflow check valve according to claim 1, characterized in that: The cover plate (17) is provided with two square grooves (18), and moving parts (20) are slidably connected inside the two square grooves (18). A sliding rod (21) is fixedly connected to one side of the moving part (20), and a baffle (24) is fixedly connected to the outer surface of one end of the sliding rod (21) away from the moving part (20).

4. A low resistance and anti-backflow check valve according to claim 1, characterized in that: Two guide grooves (22) are provided on the inner wall of the cylinder (25), and limiting holes (23) are provided inside the two guide grooves (22).

5. A low resistance and anti-backflow check valve according to claim 1, characterized in that: The cover plate (17) is provided with circular holes at positions corresponding to the slide rod (21), and a second spring (19) is sleeved on the outer side of the slide rod (21).

6. A low resistance and anti-backflow check valve according to claim 1, characterized in that: The valve body (1) is provided with a threaded hole matched with the threaded rod (5), and a handle (6) is fixedly connected to the upper surface of the threaded rod (5).

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