High-sealing stop valve

Abstract

The utility model provides a high-sealing stop valve which comprises a valve body, a valve element is arranged in the valve body, a sealing gasket is fixed to the bottom end of the valve element, a valve rod is fixed to the top of the valve element, a filter box is arranged at the water inlet end of the valve body, and a first sealing ring and a threaded cylinder are fixed to one side of the filter box. A water inlet pipe is connected to the side, away from the valve body, of the filter box, a water through hole is formed in the filter box, a mounting hole is formed in the top of the filter box, a mounting block is inserted into the mounting hole, a second sealing ring is fixed to the outer side of the mounting block, and a filter screen is arranged at the bottom of the mounting block. The high-sealing stop valve solves the problems that in the using process of an existing stop valve, impurities in flowing liquid easily enter a valve body and rub a first sealing gasket at the bottom of a valve element, the first sealing gasket is seriously abraded due to long-term use, the sealing performance of the stop valve is reduced to a certain degree, and the service life of the stop valve is prolonged. And the stop valve is easy to leak.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a high-sealing stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. The closing principle of the stop valve is to rely on the pressure of the valve stem to make the valve disc sealing surface fit tightly with the valve seat sealing surface to prevent the flow of medium.

[0003] Application publication number CN113983182A discloses a high-sealing stop valve. The sealing groove and sealing gasket structure arranged between the valve core and the valve seat of the stop valve can form a multiple sealing structure between the valve core and the valve seat, which can greatly improve the sealing of the valve. Moreover, the sealing gasket 1 and the sealing groove 1 between the valve seat adopt an interference fit, which is not easy to shift and can better ensure the sealing effect. However, during the use of the stop valve, impurities in the flowing liquid can easily enter the interior of the valve body and cause friction on the sealing gasket 1 at the bottom of the valve core. Over time, the sealing gasket 1 will be severely worn, which will reduce the sealing of the stop valve to a certain extent, and the stop valve will be prone to leakage.

[0004] Therefore, it is necessary to provide a new high-seal stop valve to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a high-sealing stop valve which can prevent impurities in the flowing liquid from rubbing against the sealing gasket and has a high sealing performance of the valve body.

[0006] The high-sealing stop valve provided by the utility model comprises a valve body, wherein a valve core is arranged in the valve body, a sealing gasket is fixed to the bottom end of the valve core, a valve stem is fixed to the top of the valve core, and a filter box is arranged at the water inlet end of the valve body.

[0007] A first sealing ring and a threaded barrel are fixed on one side of the filter box, and the threaded barrel is screwed into the first threaded groove opened in the valve body. The filter box is connected to a water inlet pipe on the side away from the valve body. A water hole is opened on the filter box, and a mounting hole is opened on the top of the filter box. A mounting block is inserted in the mounting hole. A second sealing ring is fixed on the outside of the mounting block. A filter screen is provided at the bottom of the mounting block. The top end of the filter screen is inserted in the groove opened in the mounting block, and the bottom end of the filter screen is inserted in the slot opened in the filter box. Two L-shaped fixing blocks symmetrically distributed on the left and right are fixed to the outside of the mounting block, and the L-shaped fixing block is inserted in the fixing groove opened in the filter box.

[0008] In order to achieve the effect of fixing the L-shaped fixing block inside the fixing groove, the utility model provides a high-sealing stop valve. Preferably, a plurality of movable grooves are provided on the L-shaped fixing block, a spring is fixed to the inner side wall of the movable groove, an extrusion plate is fixed to one end of the spring, a fixing rod is fixed to the end of the extrusion plate away from the spring, and the fixing rod extends out of the movable groove and is inserted into the fixing hole opened in the filter box.

[0009] In order to achieve the effect of limiting the movement of the extrusion plate, the utility model provides a high-sealing stop valve. Preferably, a baffle is provided inside the movable groove and on the outside of the fixed rod, and the outside of the baffle is fixedly connected to the inner wall of the movable groove.

[0010] In order to achieve the effect of cleaning impurities on one side of the filter, the utility model provides a high-sealing stop valve. Preferably, a cylinder is fixed on the top of the mounting block, and a cleaning plate is provided at the bottom of the mounting block and located on one side of the filter. The top rod of the cylinder passes through the mounting block and is fixed on the cleaning plate. A collecting hole is provided at the bottom of the filter box, and a T-shaped block is inserted into the collecting hole. A third sealing ring is fixed on the outside of the T-shaped block, and two sets of fixing screws are provided at the bottom of the T-shaped block. The top of the fixing screw passes through the through hole opened in the T-shaped block and is screwed into the inside of the second threaded groove opened in the filter box.

[0011] In order to achieve a more stable effect of the up and down movement of the cleaning plate, the utility model provides a high-sealing stop valve. Preferably, two guide rods are fixed to the bottom of the mounting block, and the bottom ends of the guide rods pass through the cleaning plate and are inserted into the circular groove opened in the filter box. The cleaning plate is slidably connected to the guide rods.

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

[0013] When the fluid flows into the valve body, the filter screen in the filter box can filter the impurities in the fluid to prevent the impurities from entering the valve body, thereby preventing the impurities from rubbing against the sealing gasket, reducing the wear of the sealing gasket, and effectively improving the sealing performance of the valve body. This solves the problem that in the existing stop valve, impurities in the flowing liquid can easily enter the valve body during use and rub the sealing gasket at the bottom of the valve core, which leads to serious wear of the sealing gasket over time, reducing the sealing performance of the stop valve to a certain extent and making the stop valve prone to leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the high-sealing stop valve provided by the utility model;

[0015] Figure 2 For this utility model Figure 1 A in the middle is an enlarged schematic diagram;

[0016] Figure 3 This is a three-dimensional diagram of the filter box structure of the utility model;

[0017] Figure 4 This is a three-dimensional diagram of the installation block structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the filter box of the utility model;

[0019] Figure 6 This is a schematic diagram of the connection between the filter box and the L-shaped fixing block of the utility model.

[0020] 1. Valve body; 101. First thread groove; 2. Valve core; 3. Sealing gasket; 4. Valve stem; 5. Filter box; 501. First sealing ring; 502. Threaded barrel; 503. Water inlet pipe; 504. Water through hole; 505. Mounting hole; 506. Mounting block; 507. Second sealing ring; 508. Filter screen; 509. Groove; 510. Slot; 511. L-shaped fixing block; 512. Fixing groove; 513. Movable groove; 514. Spring; 515. Extrusion plate; 516. Fixing rod; 517. Fixing hole; 518. Baffle; 519. Cylinder; 520. Cleaning plate; 521. Collecting hole; 522. T-shaped block; 523. Third sealing ring; 524. Fixing screw; 525. Through hole; 526. Second thread groove; 527. Guide rod; 528. Circular groove. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 ,in Figure 1 This is a structural diagram of the high-sealing stop valve provided by the utility model; Figure 2 For this utility model Figure 1 A in the middle is an enlarged schematic diagram; Figure 3 This is a three-dimensional diagram of the filter box structure of the utility model; Figure 4 This is a three-dimensional diagram of the installation block structure of the utility model; Figure 5 This is a schematic diagram of the internal structure of the filter box of the utility model; Figure 6This is a schematic diagram of the connection between the filter box and the L-shaped fixing block of the utility model. A high-sealing stop valve includes a valve body 1, a valve core 2 is provided in the valve body 1, a sealing gasket 3 is fixed to the bottom end of the valve core 2, a valve stem 4 is fixed to the top of the valve core 2, a filter box 5 is provided at the water inlet end of the valve body 1, and water enters from the left side of the valve body 1 and exits from the right side; a first sealing ring 501 and a threaded barrel 502 are fixed to one side of the filter box 5, and the threaded barrel 502 is screwed into the first thread groove 101 provided in the valve body 1. The side of the filter box 5 away from the valve body 1 is connected to the water inlet pipe 503, and a water through hole 504 is provided on the filter box 5. The top of the filter box 5 A mounting hole 505 is provided, a mounting block 506 is inserted into the mounting hole 505, a second sealing ring 507 is fixed to the outside of the mounting block 506, a filter screen 508 is provided at the bottom of the mounting block 506, the top end of the filter screen 508 is inserted into the groove 509 provided in the mounting block 506, and the bottom end of the filter screen 508 is inserted into the slot 510 provided in the filter box 5, and two L-shaped fixing blocks 511 symmetrically distributed on the left and right are fixed to the outside of the mounting block 506, and the L-shaped fixing block 511 is inserted into the fixing groove 512 provided in the filter box 5.

[0023] Through the above technical solution, the threaded barrel 502 on one side of the filter box 5 is screwed into the first thread groove 101, the first sealing ring 501 is used to improve the sealing of the connection between the valve body 1 and the filter box 5, and then the mounting block 506 is inserted into the mounting hole 505, and the second sealing ring 507 is used to improve the sealing of the connection between the filter box 5 and the mounting block 506. At the same time, the top and bottom ends of the filter screen 508 are respectively inserted into the groove 509 and the slot 510, so that the filter screen 508 is installed in the filter box 5, and the filter screen 508 abuts against the inner wall of the filter box 5, the water inlet pipe 503 is connected to the external equipment, and the flowing liquid enters the filter box 5 through the water inlet pipe 503. The filter screen 508 filters impurities in the flowing liquid to prevent impurities from entering the interior of the valve body 1, thereby preventing impurities from rubbing against the sealing gasket, reducing the wear of the sealing gasket, and effectively improving the sealing of the valve body 1. Finally, the filtered flowing liquid enters the interior of the valve body 1 through the water through hole 504.

[0024] Reference Figure 4 、 Figure 5 and Figure 6 , a number of movable grooves 513 are provided on the L-shaped fixing block 511, and a spring 514 is fixed to the inner wall of the movable groove 513, and an extrusion plate 515 is fixed to one end of the spring 514, and a fixing rod 516 is fixed to the end of the extrusion plate 515 away from the spring 514, and the fixing rod 516 extends out of the movable groove 513 and is inserted into the fixing hole 517 opened in the filter box 5. After the L-shaped fixing block 511 is inserted into the fixing groove 512, the fixing rod 516 in the movable groove 513 is elastically acted upon by the spring 514 and inserted into the fixing hole 517. The L-shaped fixing block 511 is fixed in the fixing groove 512 by the cooperation of the fixing rod 516 and the fixing hole 517, and then the mounting block 506 is fixed in the mounting hole 505.

[0025] Reference Figure 6 A baffle 518 is provided inside the movable groove 513 and on the outside of the fixed rod 516. The outer side of the baffle 518 is fixedly connected to the inner wall of the movable groove 513. The baffle 518 limits the movement of the extrusion plate 515 to prevent the extrusion plate 515 from moving to the outside of the movable groove 513 due to the elastic action of the spring 514, so that the extrusion plate 515 can be used normally in the movable groove 513.

[0026] Reference Figure 4 and Figure 5 , a cylinder 519 is fixed on the top of the mounting block 506, a cleaning plate 520 is provided at the bottom of the mounting block 506 and on one side of the filter screen 508, the top rod of the cylinder 519 passes through the mounting block 506 and is fixed on the cleaning plate 520, a collecting hole 521 is provided at the bottom of the filter box 5, a T-shaped block 522 is inserted into the collecting hole 521, a third sealing ring 523 is fixed on the outside of the T-shaped block 522, two sets of fixing screws 524 are provided at the bottom of the T-shaped block 522, and the top of the fixing screw 524 passes through the T-shaped block 522 opening. The through hole 525 is screwed to the inside of the second threaded groove 526 opened in the filter box 5. When the valve body 1 is closed, the fixing screw 524 is turned and removed from the bottom of the T-shaped block 522, and then the T-shaped block 522 is taken out from the collecting hole 521. The cleaning plate 520 is driven up and down by the top rod of the cylinder 519. When the cleaning plate 520 moves up and down, the impurities on the filter screen 508 are cleaned, so that the impurities pass through the collecting hole 521 and fall to the outside of the filter box 5, thereby making it more convenient to clean the impurities on the filter screen 508.

[0027] Reference Figure 4 and Figure 5 Two guide rods 527 are fixed at the bottom of the mounting block 506. The bottom end of the guide rod 527 passes through the cleaning plate 520 and is inserted into the circular groove 528 opened in the filter box 5. The cleaning plate 520 is slidably connected to the guide rod 527. When the cleaning plate 520 moves up and down, it slides on the two guide rods 527. The movement of the cleaning plate 520 is limited by the two guide rods 527, making the cleaning plate 520 more stable during movement.

[0028] The implementation principle of a high-sealing stop valve of the present utility model embodiment is as follows: the threaded barrel 502 on one side of the filter box 5 is screwed into the first thread groove 101, the first sealing ring 501 is used to improve the sealing of the connection between the valve body 1 and the filter box 5, then the mounting block 506 is inserted into the mounting hole 505, the second sealing ring 507 is used to improve the sealing of the connection between the filter box 5 and the mounting block 506, and at the same time the top and bottom ends of the filter screen 508 are respectively inserted into the groove 509 and the slot 510, so that the filter screen 508 is installed in the filter box 5, and the filter screen 508 abuts against the inner wall of the filter box 5, the water inlet pipe 503 is connected to the external equipment, the flowing liquid enters the filter box 5 through the water inlet pipe 503, the filter screen 508 filters impurities in the flowing liquid to prevent the impurities from entering the interior of the valve body 1, thereby preventing the impurities from rubbing against the sealing gasket, reducing the wear of the sealing gasket, and effectively improving the sealing of the valve body 1, and finally the filtered flowing liquid enters the interior of the valve body 1 through the water through hole 504.

[0029] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here. The components, structures and principles known to technical personnel in this field can be known by technical personnel through technical manuals or through conventional experimental methods.

[0030] 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 high sealing stop valve, characterized by: It comprises a valve body (1), a valve core (2) is arranged in the valve body (1), a sealing gasket (3) is fixed to the bottom end of the valve core (2), a valve stem (4) is fixed to the top of the valve core (2), and a filter box (5) is arranged at the water inlet end of the valve body (1); A first sealing ring (501) and a threaded barrel (502) are fixed to one side of the filter box (5), and the threaded barrel (502) is screwed into the first threaded groove (101) provided on the valve body (1). A water inlet pipe (503) is connected to the side of the filter box (5) away from the valve body (1). A water hole (504) is provided on the filter box (5), and a mounting hole (505) is provided on the top of the filter box (5). A mounting block (506) is inserted into the mounting hole (505), and the mounting block (506) is provided on the outside. A second sealing ring (507) is fixed on the side of the mounting block (506); a filter screen (508) is provided at the bottom of the mounting block (506); the top end of the filter screen (508) is inserted into a groove (509) provided in the mounting block (506); the bottom end of the filter screen (508) is inserted into a slot (510) provided in the filter box (5); two L-shaped fixing blocks (511) symmetrically distributed on the left and right are fixed on the outside of the mounting block (506); the L-shaped fixing blocks (511) are inserted into the fixing groove (512) provided in the filter box (5).

2. A high sealing stop valve according to claim 1, characterized in that: The L-shaped fixing block (511) is provided with a plurality of movable grooves (513), a spring (514) is fixed to the inner side wall of the movable groove (513), an extrusion plate (515) is fixed to one end of the spring (514), a fixing rod (516) is fixed to one end of the extrusion plate (515) away from the spring (514), and one end of the fixing rod (516) extends out of the movable groove (513) and is inserted into the interior of a fixing hole (517) provided in the filter box (5).

3. A high sealing stop valve according to claim 2, characterized in that: A baffle (518) is sleeved inside the movable groove (513) and outside the fixed rod (516), and the outside of the baffle (518) is fixedly connected to the inner wall of the movable groove (513).

4. A high sealing stop valve according to claim 1, characterized in that: A cylinder (519) is fixed on the top of the mounting block (506), and a cleaning plate (520) is provided at the bottom of the mounting block (506) and located on one side of the filter screen (508). The top rod of the cylinder (519) passes through the mounting block (506) and is fixed on the cleaning plate (520). A collecting hole (521) is provided at the bottom of the filter box (5), and a T-shaped block (522) is inserted into the collecting hole (521). A third sealing ring (523) is fixed on the outside of the T-shaped block (522). Two groups of fixing screws (524) are provided at the bottom of the T-shaped block (522). The top ends of the fixing screws (524) pass through the through holes (525) provided in the T-shaped block (522) and are screwed into the inside of the second thread groove (526) provided in the filter box (5).

5. A high sealing stop valve according to claim 4, characterized in that: Two guide rods (527) are fixed to the bottom of the mounting block (506). The bottom ends of the guide rods (527) pass through the cleaning plate (520) and are inserted into the circular groove (528) opened in the filter box (5). The cleaning plate (520) is slidably connected to the guide rods (527).

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