Dual-adjustment check valve

Abstract

The utility model discloses a double-adjustment check valve, which belongs to the technical field of check valves, and comprises a valve body, a check assembly and an adjustment assembly, two ends of the valve body are respectively provided with a water inlet channel and a water outlet channel, a valve hole is arranged in the valve body and between the water inlet channel and the water outlet channel, the top of the valve body is fixedly provided with a valve cover, and the valve cover is fixedly provided with a valve core. The non-return assembly comprises a limiting block installed in the valve deck in a sliding mode, a spring is fixedly connected to the bottom of the limiting block, a valve element is fixedly connected to the lower end of the spring, the adjusting assembly comprises a supporting cylinder fixedly connected to the valve deck, and the inner top wall of the supporting cylinder is in threaded connection with a screw rod. The screw rod is inserted into the limiting block and is in threaded connection with the limiting block; through the arrangement of the adjusting assembly, the initial compression amount of the spring can be controlled, the pressure needed for overcoming the elastic force of the spring can also change, and the opening water pressure corresponding to the check valve can be adjusted so as to adapt to various requirements under different working conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and in particular relates to a double-adjustable check valve. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and the pressure of the medium to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The movement of the disc is divided into lift type and swing type. The lift check valve is similar to the stop valve in structure, only lacking the valve stem that drives the disc. The medium enters from the inlet end (the swing check valve has a disc that is tilted and can rotate around the axis, and its working principle is similar to that of the lift check valve. The check valve is often used as a bottom valve of a pumping device to prevent the backflow of water. The check valve is used in combination with the stop valve to play a role of safety isolation. The disadvantage is that the resistance is large and the sealing is poor when closed.

[0003] Most existing check valves rely on springs to apply pressure to the valve core, causing the valve core to block the valve hole to achieve sealing and check. Since the initial compression of the spring is fixed, the corresponding opening water pressure of the check valve is a fixed value, which cannot adapt to various needs under different working conditions. Utility Model Content

[0004] The purpose of the present utility model is to provide a double-adjustable check valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a double-adjustable check valve, comprising a valve body, a check assembly, and an adjusting assembly, wherein a water inlet channel and a water outlet channel are respectively provided at both ends of the valve body, a valve hole is provided inside the valve body between the water inlet channel and the water outlet channel, a valve cover is fixedly mounted on the top of the valve body, the check assembly comprises a limit block slidably mounted in the valve cover, a spring is fixedly connected to the bottom of the limit block, and a valve core is fixedly connected to the lower end of the spring;

[0006] The regulating assembly comprises a supporting cylinder fixedly connected to the valve cover, the inner top wall of the supporting cylinder is threadedly connected with a screw rod, and the screw rod is inserted into the limiting block and threadedly connected to the limiting block.

[0007] As a preferred embodiment, a plurality of bolts are evenly inserted at the edge of the valve cover, and the valve cover is fixed to the valve body by the bolts.

[0008] As a preferred embodiment, a sealing ring is embedded in the inner wall of the valve hole.

[0009] As a preferred embodiment, the bottom of the valve cover is fixedly connected to a limiting tube, and the limiting tube is sleeved on the outside of the spring.

[0010] As a preferred embodiment, the upper end of the screw is fixedly connected to a handwheel.

[0011] As a preferred embodiment, a guide groove is provided on the inner side wall of the support tube, and a guide block is fixedly connected to the side wall of the limit block, and the guide block slides in the guide groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The double-adjustable check valve can be adjusted by rotating the handwheel to drive the screw, so that the screw drives the limit block to slide vertically along the support tube, so that the limit block compresses or releases the spring, and the initial compression amount of the spring can be controlled. When the compression amount of the spring changes, the pressure required to overcome the elastic force of the spring will also change, so that the corresponding opening water pressure of the check valve can be adjusted to meet various needs under different working conditions.

[0014] The double-adjustable check valve can limit the spring by setting the limit tube, thereby preventing the spring from tilting. The cooperation between the guide groove and the guide block can guide the limit block, thereby improving the stability of the limit block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the adjustment component of the utility model.

[0018] In the figure: 1. Valve body; 11. Water inlet channel; 12. Water outlet channel; 13. Valve hole; 14. Valve cover; 15. Bolt; 16. Sealing ring; 17. Limiting tube; 2. Check assembly; 21. Limiting block; 22. Spring; 23. Valve core; 3. Adjusting assembly; 31. Support cylinder; 32. Screw; 33. Handwheel; 34. Guide groove; 35. Guide block. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments.

[0020] The following examples are intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention based on the concept of the present invention fall within the scope of protection claimed by the present invention.

[0021] See also Figure 1-3The utility model provides a double-adjustable check valve, including a valve body 1, a check assembly 2 and an adjusting assembly 3. A water inlet channel 11 and a water outlet channel 12 are respectively provided at both ends of the valve body 1. A valve hole 13 is opened inside the valve body 1 between the water inlet channel 11 and the water outlet channel 12. A valve cover 14 is fixedly installed on the top of the valve body 1. The check assembly 2 includes a limit block 21 slidably installed in the valve cover 14. The bottom of the limit block 21 is fixedly connected to a spring 22. The lower end of the spring 22 is fixedly connected to a valve core 23. Through the arrangement of the check assembly 2, when closed, the spring 22 applies elastic force to the valve core 23, so that the valve core 23 blocks the valve hole 13 downward. When the water pressure in the water inlet channel 11 increases, the pressure overcomes the elastic force of the spring 22 to lift the valve core 23, thereby opening the valve hole 13 and allowing the fluid to pass through the valve hole 13.

[0022] Among them, a number of bolts 15 are evenly inserted at the edge of the valve cover 14, and the valve cover 14 is fixed to the valve body 1 through the bolts 15. The valve cover 14 and the valve body 1 can be disassembled through the setting of the bolts 15.

[0023] A sealing ring 16 is embedded in the inner wall of the valve hole 13 . The sealing ring 16 can improve the sealing performance between the valve core 23 and the valve hole 13 when the valve core 23 is closed.

[0024] The bottom of the valve cover 14 is fixedly connected to a limiting tube 17 , which is sleeved on the outside of the spring 22 . The setting of the limiting tube 17 can limit the spring 22 and prevent the spring 22 from tilting.

[0025] Reference Figure 2 and Figure 3 The adjusting assembly 3 includes a support cylinder 31 fixedly connected to the valve cover 14, and the inner top wall of the support cylinder 31 is threadedly connected to a screw rod 32, which is arranged vertically, and the upper end of the screw rod 32 is fixedly connected to a hand wheel 33, which is inserted into the limit block 21 and threadedly connected to the limit block 21. Through the setting of the adjusting assembly 3, the hand wheel 33 can be rotated to drive the screw rod 32, so that the screw 32 drives the limit block 21 to slide vertically along the support cylinder 31, so that the limit block 21 compresses or releases the spring 22, and the initial compression amount of the spring 22 can be controlled. When the compression amount of the spring 22 changes, the pressure required to overcome the elastic force of the spring 22 will also change, so that the opening water pressure corresponding to the check valve can be adjusted to meet various needs under different working conditions.

[0026] Among them, a guide groove 34 is opened on the inner wall of the support tube 31, and a guide block 35 is fixedly connected to the side wall of the limit block 21. The guide block 35 slides in the guide groove 34. Through the cooperation between the guide groove 34 and the guide block 35, it can guide the limit block 21 and improve the stability of the limit block 21.

[0027] The working principle and usage process of the present invention: First, through the setting of the check assembly 2, when closed, the spring 22 is used to apply elastic force to the valve core 23, so that the valve core 23 blocks the valve hole 13 downward. When the water pressure in the water inlet channel 11 increases, the pressure overcomes the elastic force of the spring 22 to lift the valve core 23, thereby opening the valve hole 13 and allowing the fluid to pass through the valve hole 13. Through the setting of the adjustment assembly 3, the handwheel 33 can be rotated to drive the screw 32, so that the screw 32 drives the limit block 21 to slide vertically along the support tube 31, so that the limit block 21 compresses or releases the spring 22, and the initial compression amount of the spring 22 can be controlled. When the compression amount of the spring 22 changes, the pressure required to overcome the elastic force of the spring 22 will also change, so that the corresponding opening water pressure of the check valve can be adjusted to meet various needs under different working conditions.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-adjustable check valve, comprising a valve body (1), a check assembly (2) and an adjusting assembly (3), characterized in that: The valve body (1) is provided with a water inlet channel (11) and a water outlet channel (12) at both ends thereof, a valve hole (13) is provided inside the valve body (1) between the water inlet channel (11) and the water outlet channel (12), a valve cover (14) is fixedly mounted on the top of the valve body (1), the check assembly (2) comprises a limit block (21) slidably mounted in the valve cover (14), a spring (22) is fixedly connected to the bottom of the limit block (21), and a valve core (23) is fixedly connected to the lower end of the spring (22); The regulating assembly (3) comprises a supporting cylinder (31) fixedly connected to the valve cover (14); the inner top wall of the supporting cylinder (31) is threadedly connected to a screw rod (32); the screw rod (32) is inserted into the limiting block (21) and is threadedly connected to the limiting block (21).

2. A double-adjustable check valve according to claim 1, characterized in that: A plurality of bolts (15) are evenly inserted at the edge of the valve cover (14), and the valve cover (14) is fixedly mounted to the valve body (1) via the bolts (15).

3. A double-adjustable check valve according to claim 1, characterized in that: A sealing ring (16) is embedded and installed on the inner wall of the valve hole (13).

4. A double-adjustable check valve according to claim 1, characterized in that: The bottom of the valve cover (14) is fixedly connected to a limit tube (17), and the limit tube (17) is sleeved on the outside of the spring (22).

5. The double-adjustable check valve according to claim 1, characterized in that: The upper end of the screw rod (32) is fixedly connected to a hand wheel (33).

6. The double-adjustable check valve according to claim 1, characterized in that: A guide groove (34) is provided on the inner side wall of the support cylinder (31), and a guide block (35) is fixedly connected to the side wall of the limit block (21), and the guide block (35) slides in the guide groove (34).

Images