Self-tightening sealing flange type gate valve

Abstract

The utility model relates to a self-tightening sealing flange type gate valve, which relates to the technical field of valves, and comprises a gate valve main body, a fixing assembly, a mounting assembly and a filtering assembly, the gate valve main body comprises a valve body, a valve plate and a plurality of valve seats, the valve seat is mounted by arranging the mounting seat in the valve body, and the fixing assembly comprises a plurality of limiting blocks, a screw rod and an abutting block. A limiting groove is formed in the outer side wall of the side, away from the valve plate, of the valve seat, the limiting block is matched with the limiting groove to be arranged on the mounting seat, a groove is formed in the end, away from the valve plate, of the valve seat, a guide face is arranged on the side, close to the limiting groove, of the groove, and the screw rod is rotationally arranged on the mounting seat and connected with the abutting block. The filter screen is arranged in the valve body through a mounting assembly, and the valve body is communicated with the collecting box by forming a discharging opening. Through the fixing assembly and the filtering assembly, the fixing effect of the valve seat is enhanced, and the probability that the filter screen is blocked is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a self-tightening sealing flange type gate valve. Background Art

[0002] Valves are common components in pipeline transportation. They are usually used to open and close pipelines, control flow direction, regulate and control medium transportation. They are control components in fluid transportation systems. They generally have functions such as cutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. They can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Gate valves are one of the most common valves. The gate valve uses the valve plate as the opening and closing part. The movement direction of the valve plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The flange gate valve is a gate valve body with flanges on both the water inlet and outlet ends.

[0003] At present, the Chinese utility model patent application with the publication date of January 17, 2023 and the publication number of CN218326285U proposes a gate valve, including a gate valve body and a filter screen, the lower end of the gate valve body is provided with a filter box, the filter screen is arranged on the left side of the inner part of the gate valve body, the upper end of the gate valve body is provided with a valve port, and the upper end of the valve port is provided with a mounting block, and a rotating assembly is penetrated in the middle of the inner part of the mounting plate, the rotating assembly includes a threaded rod, a fixed block plate and a valve plate, and a fixed block plate is arranged outside the lower part of the threaded rod. Compared with the existing ordinary gate valve, the gate valve can be convenient for operators to install during use, improve the installation efficiency of the gate valve body, and can separate the filter box from the gate valve body, clean the filter box and the inside of the gate valve body, reduce the damage of the gate valve body, and improve the service life of the gate valve body. In addition, the sealing of the connecting pipe can be sealed and fixed to improve the sealing of the gate valve body and reduce the leakage during use.

[0004] However, the valve seat may slide out from the installation position during long-term use, resulting in the failure of the valve plate and the valve seat to seal, thereby affecting the normal use of the gate valve; and, the existing gate valve with filtering function cannot realize the convenient cleaning or replacement of the filter. When the filter is blocked after long-term use, the entire gate valve must be removed and disassembled to clean or replace the filter, which makes the existing filtering gate valve cumbersome to maintain and has a short service life. Utility Model Content

[0005] The utility model provides a self-tightening sealing flange type gate valve, which can improve the technical problems existing in the related technology that the valve seat may slide out from the installation position during long-term use and the filter screen is prone to clogging.

[0006] The embodiment of the present application provides a self-tightening flange gate valve, including: a gate valve body, a fixing component, a mounting component and a filtering component, the gate valve body including a valve body, a valve plate, and a plurality of valve seats, the valve seat is installed in the valve body by setting a mounting seat, the valve plate is set between two valve seats, and cooperates with the valve plate to form a seal, the fixing component includes a plurality of limit blocks, a screw and an abutment block, a limit groove is set on the outer wall of the valve seat on the side away from the valve plate, the limit block is arranged on the mounting seat in cooperation with the limit groove, a groove is opened at one end of the valve seat away from the valve plate, a guide surface is arranged on the side of the groove close to the limit groove, the screw is rotatably set on the mounting seat and connected with the abutment block, the abutment block abuts on the guide surface, the filtering component includes a filter screen and a collection box, the filter screen is set in the valve body through the mounting component, and is slidably fitted with the side wall of the valve plate on the side close to the fluid outflow direction, the collection box is set at the bottom of the valve body, and the valve body is connected to the collection box by opening a discharge port.

[0007] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: after the valve body is installed, the fluid circulates through the inner cavity of the valve body, and the valve seat is clamped on the mounting seat through the limit groove and the limit block, and it is not easy to slip out from the mounting position. The screw is rotated to make the abutment block abut against the inclined surface, so that the outer wall of the valve seat abuts against the mounting seat. During long-term use, if the valve seat becomes loose, the screw is continued to be rotated to make the abutment block abut against the inclined surface, so that the outer wall of the valve seat abuts against the mounting seat, making it difficult for the valve seat to slip out from the mounting position; when it is necessary to filter the fluid, the valve plate is moved to open the inner cavity of the valve body, so that the valve body is in an open filtering state, and the impurities and dirt filtered out by the filter screen fall into the collection box through the discharge port under the action of gravity for collection. The setting of the discharge port, the filter screen and the collection box enables the gate valve to have a filtering function, and the impurities and dirt filtered out by the filter screen fall into the collection box through the discharge port under the action of gravity, which greatly reduces the probability of clogging of the filter screen.

[0008] A self-tightening flange gate valve provided in an embodiment of the present application can enhance the fixing effect of the valve seat at the installation location and greatly reduce the probability of clogging of the filter screen.

[0009] In some embodiments, the limiting groove is sawtooth-shaped.

[0010] In some embodiments, the fixing assembly also includes a plurality of first bolts, a connecting plate and an inclined plate. The connecting plate is fixed on the mounting seat by the first bolts, the connecting plate is connected to the inclined plate, a slope is provided on one side of the inclined plate, and the other side is in contact with the side wall of the valve seat, and the slope is inclined along the direction of fluid outflow.

[0011] In some embodiments, the mounting assembly includes a connecting rod, a fixing block and a second bolt, the fixing block is arranged on the mounting, one end of the connecting rod is connected to the filter screen, and the other end is mounted on the fixing block through the second bolt.

[0012] In some embodiments, one end of the screw rod away from the abutment block passes through the valve body and is fixedly connected to a knob.

[0013] In some embodiments, a sewage outlet is provided at the bottom of the collection box and is sealed by a first cover.

[0014] In some embodiments, a vent hole is provided on one side of the collection box and is sealed by a second cover, and the vent hole is connected to the collection chamber.

[0015] In some embodiments, the gate valve body also includes a valve stem and a handwheel. The valve stem is set on the valve body by threaded rotation. The valve stem extends into the interior of the valve body and is connected to the valve plate. The end of the valve stem away from the valve plate is connected to the handwheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a self-tightening flange gate valve provided in an embodiment of the present application;

[0018] Figure 2 For along Figure 1 The cross-sectional structure diagram along the AA line;

[0019] Figure 3 for Figure 2 Enlarged view of middle part B;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the filter screen and the installation assembly provided in the embodiment of the present application;

[0021] Figure 5 for Figure 2 Enlarged view of part C in the middle.

[0022] Among them, the reference numerals in the figure are:

[0023] 10. Gate valve body; 11. Valve body; 111. Discharge port; 12. Valve plate; 13. Valve seat; 131. Limiting groove; 132. Recess; 133. Guide surface; 14. Mounting seat; 15. Valve stem; 16. Handwheel; 20. Fixing assembly; 21. Limiting block; 22. Screw; 23. Abutment block; 24. First bolt; 25. Connecting plate; 26. Inclined plate; 261. Inclined surface; 27. Knob; 30. Filter assembly; 31. Filter screen; 32. Collecting box; 321. Collecting chamber; 322. Drain port; 323. First cover; 324. Air vent; 325. Second cover; 40. Mounting assembly; 41. Connecting rod; 42. Fixing block; 43. Second bolt. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] A self-tightening flange gate valve is a valve plate of an opening and closing part. The movement direction of the valve plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by contact between the valve seat and the valve plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance and corrosion resistance, such as 1Cr13, STL6, stainless steel, etc. The valve stem is generally tempered and surface nitrided to make it have good corrosion resistance, abrasion resistance and wear resistance; the valve plate has a rigid valve plate and an elastic valve plate, and the flange gate valve is a gate valve body with flanges at both the water inlet and outlet ends.

[0032] However, the valve seat may slide out from the installation position during long-term use, resulting in the failure of the valve plate and the valve seat to seal, thereby affecting the normal use of the gate valve; and, the existing gate valve with filtering function cannot realize the convenient cleaning or replacement of the filter. When the filter is blocked after long-term use, the entire gate valve must be removed and disassembled to clean or replace the filter, which makes the existing filtering gate valve cumbersome to maintain and has a short service life.

[0033] Based on this, in order to improve the problem in the related art that the valve seat may slip out of the installation position during long-term use and the filter screen may be easily blocked, the embodiment of the present application provides the following solution.

[0034] The present application provides a self-tightening flange gate valve, comprising:

[0035] The gate valve body 10, the fixing assembly 20, the mounting assembly 40 and the filter assembly 30, the gate valve body 10 includes a valve body 11, a valve plate 12, and a plurality of valve seats 13, the valve body 11 is provided with a mounting seat 14 to install the valve seat 13, the valve plate 12 is provided between the two valve seats 13, and cooperates with the valve plate 12 to form a seal, the fixing assembly 20 includes a plurality of limit blocks 21, a screw 22 and an abutment block 23, a limit groove 131 is provided on the outer side wall of the valve seat 13 away from the valve plate 12, the limit block 21 is provided on the mounting seat 14 in cooperation with the limit groove 131, the valve seat 13 is away from A groove 132 is provided at one end of the valve plate 12, and a guide surface 133 is provided on the side of the groove 132 close to the limiting groove 131. The screw 22 is rotatably set on the mounting seat 14 and connected to the abutment block 23, and the abutment block 23 abuts on the guide surface 133. The filter assembly 30 includes a filter screen 31 and a collection box 32. The filter screen 31 is set in the valve body 11 through the mounting assembly 40, and is slidably fitted with the side wall of the valve plate 12 on one side close to the fluid outflow direction. The collection box 32 is set at the bottom of the valve body 11, and the valve body 11 is connected to the collection box 32 by opening a discharge port 111.

[0036] As can be seen from the above, the self-tightening flange-type gate valve provided in the embodiment of the present application, after the valve body 11 is installed, the fluid circulates through the inner cavity of the valve body 11, and the valve seat 13 is clamped on the mounting seat 14 through the limiting groove 131 and the limiting block 21, and it is not easy to slip out from the installation position, and the screw rod 22 is rotated to make the abutment block 23 abut on the inclined surface 261, so that the outer wall of the valve seat 13 abuts on the mounting seat 14. During long-term use, if the valve seat 13 becomes loose, continue to rotate the screw rod 22 to make the abutment block 23 abut on the inclined surface 261, so that the outer wall of the valve seat 13 abuts on the mounting seat 14. The valve seat 13 is mounted on the seat 14 so that it is difficult for the valve seat 13 to slide out from the installation position; when it is necessary to filter the fluid, the valve plate 12 is moved to open the inner cavity of the valve body 11, so that the valve body 11 is in an open filtering state, and the impurities and dirt filtered out by the filter screen 31 fall into the collection box through the discharge port 111 under the action of gravity for collection. The arrangement of the discharge port 111, the filter screen 31 and the collection box enables the gate valve to have a filtering function, and the impurities and dirt filtered out by the filter screen 31 fall into the collection box through the discharge port 111 under the action of gravity, which greatly reduces the probability of blockage of the filter screen 31.

[0037] Optionally, in some embodiments, see Figure 1 to Figure 2The gate valve body 10 also includes a valve stem 15 and a handwheel 16. The valve stem 15 is set on the valve body 11 by threaded rotation. The valve stem 15 extends into the inside of the valve body 11 and is connected to the valve plate 12. The end of the valve stem 15 away from the valve plate 12 is connected to the handwheel 16.

[0038] With such arrangement, when it is necessary to control the valve to be opened or closed, the hand wheel 16 is turned to move the valve stem 15. The valve plate 12 can only move in a direction perpendicular to the flow of the liquid under the limitation of the valve seat 13, so that the valve plate 12 moves into the valve body 11 and the valve body 11 is in an open filtering state; the hand wheel 16 is turned to move the valve stem 15. The moving valve stem 15 drives the valve plate 12 to move into the valve body 11. When the valve plate 12 cooperates with the valve seat 13 to form a seal, the valve is in a closed state. The operation is simple and convenient. Therefore, the arrangement of the valve stem 15 and the hand wheel 16 makes it convenient for the staff to control the moving position of the valve plate 12 by turning the hand wheel 16.

[0039] Optionally, in some embodiments, please read Figures 2 to 3 The limiting groove 131 is sawtooth-shaped.

[0040] With such arrangement, when installing the valve seat 13, the valve seat 13 is installed in the mounting seat 14, and the valve seat 13 is squeezed in the direction close to the limit block 21. When squeezing the valve seat 13, the side wall of the limit groove 131 abuts against the side wall of the limit block 21, the limit groove 131 is serrated, and the limit block 21 matching the limit groove 131 is also serrated. The elastically arranged valve seat 13 is stretched and retracted under the force, and the valve seat 13 is continuously squeezed. Under the elastic action of the valve seat 13, the limit block 21 is inserted into the limit groove 131 to complete the installation. In addition, the limit groove 131 is serrated, so that the valve seat 13 is difficult to fall off during daily use.

[0041] Optionally, in some embodiments, see Figures 2 to 3 The fixing assembly 20 also includes a plurality of first bolts 24, a connecting plate 25 and an inclined plate 26. The connecting plate 25 is fixedly arranged on the mounting seat 14 by the first bolts 24. The connecting plate 25 is connected to the inclined plate 26. A slope 261 is arranged on one side of the inclined plate 26, and the other side is in contact with the side wall of the valve seat 13. The slope 261 is inclined in the direction of fluid outflow.

[0042] In this arrangement, the inclined plate 26 is fixedly mounted on the mounting seat 14 by means of the first bolt 24 and the connecting plate 25. After the valve plate 12 is opened, water flows through the valve body 11, and the inclined surface 261 is inclined in the direction of fluid outflow. When water flows through the inclined plate 26, an extrusion force is exerted on the inclined plate 26 through the inclined surface 261, so that the inclined plate 26 exerts an extrusion force on the valve seat 13, so that the valve seat 13 is more firmly fixed on the mounting seat 14; therefore, the arrangement of the inclined plate 26 increases the fixing effect of the elastically arranged valve seat 13.

[0043] Optionally, in some embodiments, see Figure 3 to Figure 4 The installation assembly 40 includes a connecting rod 41, a fixing block 42 and a second bolt 43. The fixing block 42 is arranged on the installation. One end of the connecting rod 41 is connected to the filter screen 31, and the other end is installed on the fixing block 42 through the second bolt 43.

[0044] With such arrangement, when installing the filter 31, the filter 31 is placed in the valve body 11, the multiple connecting rods 41 are aligned with the fixing block 42, and the second bolts 43 are rotated to install the connecting rods 41 on the fixing block 42, thereby achieving the effect of installing the filter 31 in the valve body 11, and the operation is simple and convenient. Therefore, the arrangement of the connecting rods 41, the fixing block 42 and the second bolts 43 makes it convenient for the staff to install the filter 31 in the valve body 11.

[0045] Optionally, in some embodiments, see Figures 2 to 3 One end of the screw rod 22 away from the abutment block 23 passes through the valve body 11 and is fixedly connected to a knob 27 .

[0046] With such arrangement, if the valve seat 13 becomes loose, the knob 27 is turned, and the screw 22 is turned to make the abutment block 23 abut against the inclined surface 261, so that the outer wall of the valve seat 13 abuts against the mounting seat 14, making it difficult for it to slip. Therefore, the arrangement of the knob 27 makes it convenient for the staff to control the fixing effect of the abutment block 23 through the screw 22, and the operation is simple and convenient.

[0047] Optionally, in some embodiments, see Figure 1 to Figure 2 A sewage outlet 322 is provided at the bottom of the collecting box and is sealed by a first cover 323 .

[0048] With such arrangement, when the valve is in an open filtering state, the impurities and dirt filtered out by the filter screen 31 fall into the collection box through the discharge port 111 under the action of gravity, and the impurities and dirt falling on the inclined surface 261 are easily concentrated at the sewage outlet 322 under the action of gravity. The first cover body 323 is opened to allow the impurities and dirt in the collection box to be discharged from the sewage outlet 322. Therefore, the arrangement of the sewage outlet 322 and the first cover body 323 makes it convenient for the staff to remove impurities in the collection box.

[0049] Optionally, in some embodiments, see Figure 5 A vent hole 324 is provided on one side of the collection box and is sealed by a second cover 325 , and the vent hole 324 is connected to the collection chamber 321 .

[0050] With such a configuration, when it is necessary to discharge the impurities and dirt in the collection box, the first cover 323 is opened, and the impurities and dirt in the collection chamber 321 are easily discharged from the drain outlet 322 under the action of pressure. The second cover 325 is opened to allow the external gas to pass through the vent 324 and enter the collection chamber 321, balancing the pressure between the collection chamber 321 and the outside world, so that the impurities and dirt in the collection chamber 321 can be discharged from the drain outlet 322 under the action of gravity. The operation is simple and convenient. Therefore, the vent 324 is set to balance the pressure between the collection chamber 321 and the outside world, so that the staff can discharge the impurities and dirt in the collection chamber 321 from the drain outlet 322 under the action of gravity. The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A self-tightening flange gate valve, characterized in that: It comprises a gate valve body (10), a fixing assembly (20), a filtering assembly (30) and a mounting assembly (40); The gate valve body (10) comprises a valve body (11), a valve plate (12), and a plurality of valve seats (13); a mounting seat (14) is provided in the valve body (11) to mount the valve seat (13); the valve plate (12) is disposed between two valve seats (13) and cooperates with the valve plate (12) to form a seal; The fixing assembly (20) comprises a plurality of limit blocks (21), a screw rod (22) and an abutment block (23); a limit groove (131) is arranged on the outer side wall of the valve seat (13) away from the valve plate; the limit block (21) is arranged on the mounting seat (14) in cooperation with the limit groove (131); a groove (132) is provided at one end of the valve seat (13) away from the valve plate; a guide surface (133) is provided on the side of the groove (132) close to the limit groove (131); the screw rod (22) is rotatably arranged on the mounting seat (14) and connected to the abutment block (23); the abutment block (23) abuts against the guide surface (133); The filter assembly (30) comprises a filter screen (31) and a collection box (32); the filter screen (31) is arranged in the valve body (11) through the mounting assembly (40) and is slidably fitted with a side wall of the valve plate close to the fluid outflow direction; the collection box (32) is arranged at the bottom of the valve body (11); and the valve body (11) is connected to the collection box (32) by opening a discharge port (111).

2. A self-tightening flange gate valve according to claim 1, characterized in that: The limiting groove (131) is sawtooth-shaped.

3. A self-tightening flange gate valve according to claim 2, characterized in that: The fixing assembly (20) further comprises a plurality of first bolts (24), a connecting plate (25) and an inclined plate (26); the connecting plate (25) is fixedly arranged on the mounting seat (14) by means of the first bolts (24); the connecting plate (25) is connected to the inclined plate (26); a slope (261) is arranged on one side of the inclined plate (26) and the other side is in contact with the side wall of the valve seat (13); the slope (261) is inclined in the direction in which the fluid flows out.

4. A self-tightening flange gate valve according to any one of claims 1 to 3, characterized in that: The mounting assembly (40) comprises a connecting rod (41), a fixing block (42) and a second bolt (43); the fixing block (42) is arranged on the mounting; one end of the connecting rod (41) is connected to the filter screen (31), and the other end is mounted on the fixing block (42) via the second bolt (43).

5. A self-tightening flange gate valve according to claim 4, characterized in that: One end of the screw rod (22) away from the abutment block (23) passes through the valve body (11) and is fixedly connected to a knob (27).

6. The self-tightening flange gate valve according to claim 1, characterized in that: The collecting box (32) has a collecting cavity (321) therein, and a sewage outlet (322) is provided at the bottom of the collecting box (32) and is sealed by a first cover (323).

7. A self-tightening flange gate valve according to claim 6, characterized in that: A vent hole (324) is provided on one side of the collection box (32) and is sealed by a second cover (325); the vent hole (324) is connected to the collection chamber (321).

8. The self-tightening flange gate valve according to claim 1, characterized in that: The gate valve body (10) further comprises a valve stem (15) and a hand wheel (16); the valve stem (15) is arranged on the valve body (11) by means of a threaded rotation; the valve stem (15) extends into the interior of the valve body (11) and is connected to the valve plate; the end of the valve stem (15) away from the valve plate (12) is connected to the hand wheel (16).

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