Check valve with filter screen convenient to replace

Abstract

The check valve comprises a check valve body and a fixing frame located at one end of a feeding connector of the check valve body, fixing pipes are fixed to the surfaces of the two ends of the fixing frame, and mounting rings are fixed to the surfaces of the ends, away from the fixing frame, of the fixing pipes. A matched first through hole is formed in the position, corresponding to the inner ring face of the fixing pipe, between the middles of the surfaces of the two ends of the fixing frame, an indwelling groove is formed in the middle in the fixing frame, a connecting frame is slidably installed on the portion, located in the indwelling groove, of the fixing frame in the vertical direction, and filter screens are fixed to the two sides of the inner side of the connecting frame. According to the check valve, the filter screen can be conveniently mounted and dismounted, when the filter screen needs to be replaced, the operation of replacing the filter screen is convenient and fast, the working efficiency of replacing the filter screen can be guaranteed, and the check valve can be conveniently used.

Description

Technical Field

[0001] The utility model relates to the field of check valves, in particular to a check valve which is convenient for replacing a filter screen. 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 medium pressure to produce movement to block the backflow of the medium. The movement modes of the check valve are divided into lifting type and swing type. 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 a stop valve to play a role in safety isolation.

[0003] When using a check valve, in order to ensure that the liquid medium transported through the check valve does not contain impurities, a filter screen needs to be installed at the feed interface of the check valve to filter and remove impurities in the liquid medium entering the check valve, so that the liquid medium entering the check valve does not contain impurities.

[0004] However, when the filter installed at the feed interface of the existing check valve is used, it is not convenient to install and disassemble the filter. When the filter needs to be replaced, the operation of replacing the filter is relatively cumbersome, which will affect the work efficiency of replacing the filter and is not conducive to the use of the check valve.

[0005] Therefore, we propose a check valve that facilitates filter replacement. Utility Model Content

[0006] The utility model aims to provide a check valve which is convenient for replacing a filter screen, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A check valve for easy replacement of a filter comprises a check valve body and a fixed frame located at one end of its feed interface, fixed pipes are fixed to the surfaces of both ends of the fixed frame, mounting rings are fixed to the surface of the end of the fixed pipe away from the fixed frame, the mounting ring close to one end of the check valve body is installed between the feed interface of the check valve body, a matching first through hole is provided between the middle parts of the surfaces of both ends of the fixed frame corresponding to the inner ring surface of the fixed pipe, a retaining groove is provided in the middle part of the fixed frame, the top of the retaining groove passes through the middle part of the upper surface of the fixed frame, a connecting frame is slidably installed in the retaining groove along the vertical direction on the fixed frame, and filters are fixed on both sides of the inner side of the connecting frame.

[0009] As a further solution of the utility model: a first sealing gasket is fixed on both sides of the fixing frame located in the retention groove, a matching second through hole is opened on the first sealing gasket corresponding to the first through hole, the second through holes penetrate the two side surfaces of the middle part of the corresponding first sealing gasket, and the side of the first sealing gasket close to the filter screen is in a matching and fitting state with the corresponding position on the corresponding filter screen.

[0010] By adopting the above technical solution: the provision of the first sealing gasket helps to seal the filter screen and the retention groove on the fixed frame.

[0011] As a further solution of the utility model: the four corners of the upper surface of the fixed frame are fixed with fixed blocks, the fixed blocks are in a vertical state, and the upper end surfaces of the fixed blocks are commonly fixed with fixed plates, which are in a horizontal state.

[0012] By adopting the above technical solution: the setting of the fixing frame can fix and limit the fixing block, which is convenient for stable use of the fixing block.

[0013] As a further solution of the utility model: an electric telescopic rod is installed in the middle of the upper surface of the fixed plate, the electric telescopic rod is in a vertical state, the output rod of the electric telescopic rod faces downward, and the output rod of the electric telescopic rod passes through the upper surface and the lower surface of the middle part of the fixed plate.

[0014] By adopting the above technical solution: the setting of the fixing plate can fix and limit the electric telescopic rod, which helps to stably use the electric telescopic rod.

[0015] As a further solution of the utility model: a moving block is fixed at the lower end of the electric telescopic rod output rod, a limiting block is fixed in the middle of the upper surface of the connecting frame, the limiting block is in a horizontal state, and a matching limiting groove is opened in the middle of the lower surface of the moving block corresponding to the limiting block.

[0016] By adopting the above technical solution: the provision of the electric telescopic rod helps to drive the moving block to move, making it easier to use the moving block.

[0017] As a further solution of the utility model: the limit groove passes through the two end surfaces of the corresponding position on the moving block, the limit block is located in the limit groove on the moving block and is slidably connected with the limit groove on the moving block along the horizontal direction.

[0018] By adopting the above technical solution: the setting of the upper limit groove on the moving block is helpful to limit the limit block.

[0019] As a further solution of the utility model: a second sealing gasket is fixed to a surface of a side of a mounting ring close to one end of the check valve body and close to the check valve body, and the second sealing gasket and the opposite surface of the corresponding mounting ring are in a matching and fitting state.

[0020] By adopting the above technical solution: the installation ring is provided, the second sealing gasket can be fixed and limited.

[0021] As a further solution of the utility model: bolts are threadedly inserted in the horizontal direction around the mounting ring, and the bolts penetrate the two side surfaces of the corresponding mounting ring and the corresponding positions on the second sealing gasket. The bolt threads close to one end of the check valve body are installed at the corresponding positions on the corresponding mounting ring, the second sealing gasket and the check valve body feed interface.

[0022] By adopting the above technical solution: the provision of the bolts helps to install and limit the installation ring close to one end of the check valve body and the check valve body.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. In the utility model, when the connecting frame moves in the vertical direction, it can drive the filter to move in the vertical direction, so as to facilitate the disassembly and assembly of the connecting frame and the filter. When in use, the filter can be conveniently installed and disassembled. When the filter needs to be replaced, the operation of replacing the filter is convenient, which helps to ensure the work efficiency of replacing the filter, so as to facilitate the use of the check valve.

[0025] 2. In the utility model, when the connecting frame moves in the horizontal direction, it can drive the limit block to move in the horizontal direction along the limit groove on the moving block, so as to facilitate the assembly and disassembly between the connecting frame and the moving block. The first sealing gasket can seal the retention groove on the fixed frame and the corresponding position on the filter net to avoid leakage of the liquid medium, so as to facilitate filtering impurities in the liquid medium through the filter net. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the mounting ring structure of the utility model;

[0028] Figure 3 This is a schematic diagram of the fixed frame structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the fixed plate structure of the utility model;

[0030] Figure 5 This is a schematic diagram of the retention groove structure of the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the moving block of the utility model.

[0032] In the figure: 1. check valve body; 2. fixing frame; 3. retention groove; 4. first sealing gasket; 5. second sealing gasket; 6. fixing pipe; 7. mounting ring; 8. bolt; 9. connecting frame; 10. filter screen; 11. moving block; 12. limiting block; 13. limiting groove; 14. fixing block; 15. fixing plate; 16. electric telescopic rod; 17. first through hole; 18. second through hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figures 1 to 6 In an embodiment of the utility model, a check valve for facilitating replacement of a filter screen comprises a check valve body 1 and a fixing frame 2 located at one end of the feed interface thereof, fixing pipes 6 are fixed to both end surfaces of the fixing frame 2, mounting rings 7 are fixed to the end surface of the fixing pipe 6 away from the fixing frame 2, the mounting ring 7 close to one end of the check valve body 1 is installed between the feed interface of the check valve body 1, a matching first through hole 17 is opened between the middle parts of the two end surfaces of the fixing frame 2 corresponding to the inner ring surface of the fixing pipe 6, a retaining groove 3 is opened in the middle part of the fixing frame 2, and the top of the retaining groove 3 passes through the upper surface of the fixing frame 2 In the middle part, a connecting frame 9 is slidably installed in the retaining groove 3 on the fixed frame 2 along the vertical direction, and filter screens 10 are fixed on both sides of the inner side of the connecting frame 9. When the connecting frame 9 moves in the vertical direction, it can drive the filter screen 10 to move in the vertical direction, so as to facilitate the disassembly and assembly of the connecting frame 9 and the filter screen 10. The filter screen 10 can be conveniently installed and disassembled during use. When the filter screen 10 needs to be replaced, the operation of replacing the filter screen 10 is convenient, which helps to ensure the work efficiency of replacing the filter screen 10, so as to facilitate the use of the check valve.

[0035] Among them, the first sealing gasket 4 is fixed on both sides of the fixed frame 2 in the retention groove 3, and the first sealing gasket 4 is provided with a matching second through hole 18 corresponding to the first through hole 17, and the second through hole 18 passes through the two side surfaces of the middle of the corresponding first sealing gasket 4, and the side of the first sealing gasket 4 close to the filter screen 10 is in a matching and fitting state with the corresponding position on the corresponding filter screen 10, and the first sealing gasket 4 helps to seal the filter screen 10 and the retention groove 3 on the fixed frame 2; the four corners of the upper surface of the fixed frame 2 are fixed with fixed blocks 14, and the fixed blocks 14 are vertical The fixing plate 15 is fixed between the upper end surfaces of the fixing block 14, and the fixing plate 15 is in a horizontal state. The fixing frame 2 can fix and limit the fixing block 14, which is convenient for the stable use of the fixing block 14; an electric telescopic rod 16 is installed in the middle of the upper surface of the fixing plate 15, and the electric telescopic rod 16 is in a vertical state. The output rod of the electric telescopic rod 16 faces downward, and the output rod of the electric telescopic rod 16 passes through the upper surface and the lower surface of the middle part of the fixing plate 15. The fixing plate 15 can fix and limit the electric telescopic rod 16, which is conducive to the stable use of the electric telescopic rod 16.

[0036] A moving block 11 is fixed to the lower end of the output rod of the electric telescopic rod 16, and a limiting block 12 is fixed in the middle of the upper surface of the connecting frame 9. The limiting block 12 is in a horizontal state, and a matching limiting groove 13 is provided in the middle of the lower surface of the moving block 11 corresponding to the limiting block 12. The electric telescopic rod 16 helps to drive the moving block 11 to move, which is convenient for the use of the moving block 11; the limiting groove 13 runs through the two end surfaces of the corresponding positions on the moving block 11, the limiting block 12 is located in the limiting groove 13 on the moving block 11 and is slidably connected with the limiting groove 13 on the moving block 11 in a horizontal direction, and the limiting groove 13 on the moving block 11 helps to limit the limiting block 12.

[0037] A second sealing gasket 5 is fixed to a side surface of a mounting ring 7 near one end of the check valve body 1, and the second sealing gasket 5 and the corresponding opposite surface of the mounting ring 7 are in a matched and fitted state, and the mounting ring 7 can fix and limit the second sealing gasket 5; bolts 8 are threadedly inserted in the horizontal direction around the mounting ring 7, and the bolts 8 pass through the corresponding mounting ring 7 and the two side surfaces of the corresponding positions on the second sealing gasket 5. The bolts 8 near one end of the check valve body 1 are threadedly installed at the corresponding mounting ring 7, the second sealing gasket 5 and the corresponding positions on the feed interface of the check valve body 1, and the bolts 8 help to install and limit the mounting ring 7 near one end of the check valve body 1 and the check valve body 1.

[0038] The working principle of the utility model is: during use, the second sealing gasket 5 on the mounting ring 7 near one end of the check valve body 1 is made to correspond to the feed interface of the check valve body 1, and the mounting ring 7 near one end of the check valve body 1 and the second sealing gasket 5 are installed between the corresponding positions on the feed interface of the check valve body 1 through bolts 8, the pipeline for conveying liquid medium from the outside is corresponded to the mounting ring 7 far away from one end of the check valve body 1, and the mounting ring 7 far away from one end of the check valve body 1 is installed between the pipeline for conveying liquid medium from the outside through bolts 8, the mounting ring 7 can support and limit the fixed frame 2 and the various components assembled on the fixed frame 2 through the fixing pipe 6, which is helpful to stably use the fixed frame 2 and the various components assembled on the fixed frame 2.

[0039] The external pipeline for conveying the liquid medium can convey the liquid medium to the filter screen 10 through the mounting ring 7, the fixed pipe 6, the first through hole 17 on the fixed frame 2 and the second through hole 18 on the first sealing gasket 4. The first sealing gasket 4 can seal between the retention groove 3 on the fixed frame 2 and the corresponding position on the filter screen 10 to prevent leakage of the liquid medium, so as to facilitate filtering impurities in the liquid medium through the filter screen 10. The liquid medium filtered by the filter screen 10 will be conveyed to the first through hole 17 on the fixed frame 2 through the inner side of the connecting frame 9 and the second through hole 18 on the first sealing gasket 4. The filtered liquid medium will be conveyed to the check valve body 1 through the fixed pipe 6, the mounting ring 7 and the second sealing gasket 5 near one end of the check valve body 1. The second sealing gasket 5 helps to seal between the mounting ring 7 near one end of the check valve body 1 and the check valve body 1. The liquid medium conveyed to the check valve body 1 will be conveyed through the check valve body 1.

[0040] When the filter screen 10 needs to be replaced, the electric telescopic rod 16 on the upper surface of the fixing plate 15 is opened, and the fixing plate 15 can fix and limit the electric telescopic rod 16, which is helpful for the stable use of the electric telescopic rod 16. When the electric telescopic rod 16 is opened, the output rod of the electric telescopic rod 16 can drive the moving block 11 to move upward. When the moving block 11 moves upward, it can drive the connecting frame 9 to move upward along the inner side of the retention groove 3 on the fixing frame 2 through the limiting groove 13 and the limiting block 12. When the connecting frame 9 moves upward, it can drive the filter screen 10 to move upward. After the connecting frame 9 and the filter screen 10 are moved to the outside of the retention groove 3 on the fixed frame 2, the connecting frame 9 is moved in the horizontal direction. When the connecting frame 9 moves in the horizontal direction, it can drive the limit block 12 to move horizontally in the limit groove 13 on the moving block 11, so as to remove the connecting frame 9. When the connecting frame 9 is removed, it is convenient to remove the filter screen 10, which is helpful to replace the connecting frame 9 and the filter screen 10.

[0041] The limit block 12 on the connection frame 9 that needs to be replaced is slid in the horizontal direction into the limit groove 13 on the moving block 11, and the electric telescopic rod 16 is further opened. The output rod of the electric telescopic rod 16 can drive the moving block 11 to move downward. When the moving block 11 moves downward, it can drive the connection frame 9 and the filter screen 10 to move downward through the limit groove 13 and the limit block 12, so that the connection frame 9 and the filter screen 10 are moved and reset to between the first sealing gasket 4 in the retention groove 3 on the fixed frame 2, so as to replace and install the filter screen 10.

[0042] During use, the filter 10 can be easily installed and disassembled. When the filter 10 needs to be replaced, the operation of replacing the filter 10 is convenient, which helps to ensure the work efficiency of replacing the filter 10, so as to facilitate the use of the check valve.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A check valve for easy replacement of a filter screen, comprising a check valve body (1) and a fixing frame (2) located at one end of the feed interface thereof, characterized in that: The fixed frame (2) is fixed with a fixed tube (6) on both end surfaces, and a mounting ring (7) is fixed on the end surface of the fixed tube (6) away from the fixed frame (2). The mounting ring (7) close to one end of the check valve body (1) is installed between the feed interface of the check valve body (1). A matching first through hole (17) is provided between the middle parts of the two end surfaces of the fixed frame (2) and the inner ring surface of the fixed tube (6). A retaining groove (3) is provided in the middle part of the fixed frame (2), and the top of the retaining groove (3) passes through the middle part of the upper surface of the fixed frame (2). A connecting frame (9) is slidably installed in the retaining groove (3) on the fixed frame (2) along the vertical direction, and filter screens (10) are fixed on both sides of the inner side of the connecting frame (9).

2. A check valve for easy replacement of filter screen according to claim 1, characterized in that: A first sealing gasket (4) is fixed on both sides of the fixing frame (2) located in the retention groove (3); a matching second through hole (18) is opened on the first sealing gasket (4) corresponding to the first through hole (17); the second through hole (18) passes through both side surfaces of the middle of the corresponding first sealing gasket (4); and a side of the first sealing gasket (4) close to the filter screen (10) is in a matching and fitting state with a corresponding position on the corresponding filter screen (10).

3. A check valve for easy replacement of filter screen according to claim 2, characterized in that: The four corners of the upper surface of the fixing frame (2) are all fixed with fixing blocks (14), the fixing blocks (14) are all in a vertical state, and the upper end surfaces of the fixing blocks (14) are commonly fixed with fixing plates (15), the fixing plates (15) are in a horizontal state.

4. A check valve for easy replacement of filter screen according to claim 3, characterized in that: An electric telescopic rod (16) is installed in the middle of the upper surface of the fixing plate (15). The electric telescopic rod (16) is in a vertical state, and the output rod of the electric telescopic rod (16) faces downward. The output rod of the electric telescopic rod (16) passes through the upper surface and the lower surface of the middle part of the fixing plate (15).

5. A check valve for easy replacement of filter screen according to claim 4, characterized in that: A moving block (11) is fixed at the lower end of the output rod of the electric telescopic rod (16), a limiting block (12) is fixed in the middle of the upper surface of the connecting frame (9), the limiting block (12) is in a horizontal state, and a matching limiting groove (13) is provided in the middle of the lower surface of the moving block (11) corresponding to the limiting block (12).

6. A check valve for easy replacement of filter screen according to claim 5, characterized in that: The limiting groove (13) passes through the two end surfaces of the corresponding positions on the moving block (11); the limiting block (12) is located in the limiting groove (13) on the moving block (11) and is slidably connected with the limiting groove (13) on the moving block (11) in a horizontal direction.

7. A check valve for easy replacement of filter screen according to claim 6, characterized in that: A second sealing gasket (5) is fixed to a surface of a side of a mounting ring (7) close to one end of the check valve body (1) and close to the check valve body (1); the second sealing gasket (5) and the corresponding opposite surface of the mounting ring (7) are in a matching and fitting state.

8. A check valve for easy replacement of filter screen according to claim 7, characterized in that: Bolts (8) are threadedly inserted in the horizontal direction around the mounting ring (7), and the bolts (8) penetrate the two side surfaces of the corresponding positions on the corresponding mounting ring (7) and the second sealing gasket (5). The bolts (8) close to one end of the check valve body (1) are threadedly installed at the corresponding positions on the corresponding mounting ring (7), the second sealing gasket (5) and the feed interface of the check valve body (1).

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