Check valve with replaceable valve seat

Abstract

The utility model discloses a check valve with a replaceable valve seat, which belongs to the technical field of check valves and comprises a valve body, a valve cover, the valve seat and a valve core, the valve cover is fixedly mounted at the top of the valve body, a valve hole is arranged in the valve body, the valve seat is detachably mounted in the valve hole, the valve core is arranged above the valve hole, and the valve seat is detachably mounted in the valve hole. Connecting grooves are formed in the positions, located on the two sides of the valve hole, of the valve body, fixing grooves are formed in the inner walls of the connecting grooves, connecting columns are arranged on the two sides of the valve seat, grooves are formed in the connecting columns, bolts are rotationally connected to the tops of the grooves, and movable blocks are in threaded connection with the lower ends of the bolts; a movable rod is hinged to the bottom of the movable block, and a fixed block is hinged to one end of the movable rod; through the arrangement of the connecting groove, the fixing groove, the connecting column, the groove, a bolt, a movable block, a movable rod and a fixing block, after the matching degree between the valve seat and the valve element is reduced, the valve seat can be independently disassembled and replaced, and the situation that the whole check valve is scrapped is avoided.

Description

Technical Field

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

[0002] A check valve is a valve with a circular disc as its opening and closing part. It relies on its own weight and medium pressure to produce a movement to block the backflow of the medium. It is an automatic valve, also known as a non-return valve, one-way valve, reflux valve or isolation valve. The medium flows in from the inlet end and flows out from the outlet end. When the inlet pressure is greater than the sum of the weight of the valve disc and its flow resistance, the valve is opened. Conversely, when the medium flows back, the valve is closed.

[0003] In the prior art, a check valve is mainly composed of a valve body, a valve cover, a valve seat and a valve core. The valve seat is arranged at the valve hole in the valve body and cooperates with the valve core to realize the non-return effect of the check valve. However, the valve seat and the valve body of the existing check valve are mostly an integrated structure. With long-term use, the valve seat is easily worn or adhered to impurities, resulting in a decrease in the fit between the valve seat and the valve core, affecting the sealing performance of the check valve. Since the valve seat cannot be disassembled separately, the valve seat cannot be replaced, which eventually causes the entire check valve to be scrapped. Utility Model Content

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

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a check valve with a replaceable valve seat, comprising a valve body, a valve cover, a valve seat and a valve core, the valve cover being fixedly mounted on the top of the valve body, a valve hole being provided inside the valve body, the valve seat being detachably mounted in the valve hole, the valve core being arranged above the valve hole, connecting grooves being provided on both sides of the valve body at the valve hole, a fixing groove being provided on the inner wall of the connecting groove, connecting columns being provided on both sides of the valve seat, a groove being provided inside the connecting column, a bolt being rotatably connected to the top of the groove, a movable block being threadedly connected to the lower end of the bolt, a movable rod being hinged to the bottom of the movable block, and a fixed block being hinged to one end of the movable rod.

[0006] As a preferred embodiment, connecting flanges are provided at both ends of the valve body.

[0007] As a preferred embodiment, a cavity is defined inside the valve cover, a spring is disposed in the cavity, one end of the spring abuts against a valve stem, and a lower end of the valve stem is fixedly connected to the valve core.

[0008] As a preferred embodiment, a sealing gasket is fixedly connected to the bottom of the valve core.

[0009] As a preferred embodiment, a receiving groove is provided on the top of the valve seat, the upper end of the bolt extends into the receiving groove, and a sealing plug is inserted into the top of the receiving groove.

[0010] As a preferred embodiment, the inner wall of the groove is provided with a guide bar, and guide grooves are provided on both sides of the movable block, and the guide bar is slidably connected to the guide grooves.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The check valve with a replaceable valve seat is provided with a connecting groove, a fixing groove, a connecting column, a groove, a bolt, a movable block, a movable rod and a fixing block. When the valve seat is installed, the valve seat can be inserted into the valve hole, and the connecting column is aligned with the connecting groove and inserted. Then, the bolt is rotated to drive the movable block to descend, and the movable block drives the fixing block through the movable rod to be inserted into the fixing groove to fix the valve seat. When the fit between the valve seat and the valve core decreases, the valve seat can be disassembled and replaced separately to avoid the entire check valve being scrapped.

[0013] The check valve with a replaceable valve seat can protect the bolts through the provision of a sealing plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 For this utility model Figure 2 A magnified view of the structure at center A.

[0017] In the figure: 1. Valve body; 11. Valve hole; 12. Connecting groove; 13. Fixing groove; 14. Connecting flange; 2. Valve cover; 21. Spring; 22. Valve stem; 3. Valve seat; 31. Connecting column; 32. Groove; 33. Bolt; 34. Movable block; 35. Movable rod; 36. Fixing block; 37. Sealing plug; 38. Guide groove; 4. Valve core; 41. Sealing gasket. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments.

[0019] 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.

[0020] See also Figure 1-3 When the check valve is replaced by the valve seat, the valve core 4 is fixed with the valve cover 2 and the valve seat 3 is removably mounted on the valve body 1.

[0021] A sealing gasket 41 is fixedly connected to the bottom of the valve core 4 . The provision of the sealing gasket 41 can improve the sealing performance between the valve core 4 and the valve seat 3 .

[0022] The valve body 1 is provided with connecting grooves 12 on both sides of the valve hole 11, and a fixing groove 13 is provided on the inner wall of the connecting groove 12. A connecting column 31 is provided on both sides of the valve seat 3. A groove 32 is provided inside the connecting column 31. A bolt 33 is rotatably connected to the top of the groove 32. The lower end of the bolt 33 is threadedly connected to a movable block 34. The bottom of the movable block 34 is hinged with a movable rod 35. One end of the movable rod 35 is hinged with a fixing block 36. Through the connecting groove 12, the fixing groove 13, the connecting column 31, the groove 32, the bolt 33, The movable block 34, movable rod 35 and fixed block 36 are arranged so that when installing the valve seat 3, the valve seat 3 can be inserted into the valve hole 11, and the connecting column 31 is aligned with the connecting groove 12 and inserted, and then the bolt 33 is rotated to make the bolt 33 drive the movable block 34 to descend, so that the movable block 34 drives the fixed block 36 to be inserted into the fixed groove 13 through the movable rod 35 to fix the valve seat 3. When the fit between the valve seat 3 and the valve core 4 decreases, the valve seat 3 can be disassembled and replaced separately to avoid scrapping the entire check valve.

[0023] Among them, a receiving groove is opened on the top of the valve seat 3, and the upper end of the bolt 33 extends into the receiving groove. A sealing plug 37 is inserted into the top of the receiving groove. The setting of the sealing plug 37 can protect the bolt 33.

[0024] Among them, the inner wall of the groove 32 is provided with a guide bar, and guide grooves 38 are opened on both sides of the movable block 34. The guide bar is slidably connected to the guide grooves 38. Through the cooperation of the guide bar and the guide grooves 38, the movable block 34 can be guided.

[0025] The working principle and usage process of the present invention are as follows: First, through the arrangement of the connecting groove 12, the fixing groove 13, the connecting column 31, the groove 32, the bolt 33, the movable block 34, the movable rod 35 and the fixed block 36, when installing the valve seat 3, the valve seat 3 can be inserted into the valve hole 11, and the connecting column 31 is aligned with the connecting groove 12 and inserted, and then the bolt 33 is rotated to make the bolt 33 drive the movable block 34 to descend, so that the movable block 34 drives the fixed block 36 to be inserted into the fixed groove 13 through the movable rod 35 to fix the valve seat 3. When the fit between the valve seat 3 and the valve core 4 decreases, the valve seat 3 can be disassembled and replaced separately to avoid scrapping the entire check valve.

[0026] 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 check valve with a replaceable valve seat, comprising a valve body (1), a valve cover (2), a valve seat (3) and a valve core (4), characterized in that: A valve cover (2) is fixedly installed on the top of the valve body (1), a valve hole (11) is provided inside the valve body (1), the valve seat (3) is detachably installed in the valve hole (11), the valve core (4) is arranged above the valve hole (11), the valve body (1) is provided with connecting grooves (12) on both sides of the valve hole (11), the inner wall of the connecting groove (12) is provided with a fixing groove (13), connecting columns (31) are provided on both sides of the valve seat (3), a groove (32) is provided inside the connecting column (31), the top of the groove (32) is rotatably connected with a bolt (33), the lower end of the bolt (33) is threadedly connected with a movable block (34), the bottom of the movable block (34) is hinged with a movable rod (35), and one end of the movable rod (35) is hinged with a fixed block (36).

2. A check valve with a replaceable valve seat according to claim 1, characterized in that: Both ends of the valve body (1) are provided with connecting flanges (14).

3. The check valve with a replaceable valve seat according to claim 1, characterized in that: A cavity is provided inside the valve cover (2), a spring (21) is provided in the cavity, one end of the spring (21) abuts against a valve stem (22), and the lower end of the valve stem (22) is fixedly connected to the valve core (4).

4. The check valve with a replaceable valve seat according to claim 1, characterized in that: A sealing gasket (41) is fixedly connected to the bottom of the valve core (4).

5. The check valve with a replaceable valve seat according to claim 1, characterized in that: The top of the valve seat (3) is provided with a receiving groove, the upper end of the bolt (33) extends into the receiving groove, and the top of the receiving groove is plugged with a sealing plug (37).

6. The check valve with a replaceable valve seat according to claim 1, characterized in that: The inner wall of the groove (32) is provided with a guide bar, and both sides of the movable block (34) are provided with a guide groove (38), and the guide bar is slidably connected to the guide groove (38).

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