Check valve with slow closing structure

Abstract

The utility model relates to the field of check valves, in particular to a check valve with a slow closing structure, which comprises a valve body used for conveying media. The first flange plate is arranged above the valve body, and a first screw rod penetrates through the periphery of the first flange plate. According to the check valve with the slow closing structure, through the arrangement of the valve body, the movable rod, the connecting rod, the valve clack and the slow closing mechanism, when a medium is conveyed in the valve body, the valve clack is pushed to turn over through the impact force of the medium, and after the medium is conveyed, the valve clack loses the impact force of the medium and turns down, so that the slow closing structure is formed. A buffer rod in the slow closing mechanism makes contact with the overturned valve clack, telescopic buffering is carried out through a telescopic rod and a spring behind the buffer rod, and therefore slow closing treatment is carried out on the valve clack, and the situation that when the valve clack is opened or closed, the action is violently aggressive, the interior of the valve clack is impacted, and abrasion is caused is avoided through the arrangement. Therefore, the service life of the valve clack is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of check valves, in particular to a check valve with a slow-closing structure. 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. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement modes are divided into lifting type and swing type.

[0003] After searching, a utility model swing check valve with announcement number CN206054840U includes a valve body and a valve cover, wherein the inlet channel, the valve inner cavity and the outlet channel of the valve body form a medium passage, the inlet channel and the valve inner cavity are separated by a cover plate, the cover plate controls the opening and closing state through a rocker, a valve seat is provided on the upper side of the inlet channel, the rocker is hinged to the valve seat through a rocker shaft, the rocker is hinged to the connecting boss on the top of the cover plate through a connecting shaft, and a sealing ring is provided on the side of the cover plate facing the inlet channel, and the sealing ring is fixed by a fixing ring sleeve. The swing check valve described in the utility model has the following advantages: in the working state, the check valve can play a non-return role, when there is no need to control the reflux of the liquid medium, the cover plate is opened by the rocker, the opening angle of the cover plate is controlled by the rocker shaft and the connecting shaft, the wear of the cover plate is reduced, the service life of the valve is extended, and the sealing ring is pressed tightly at the interface of the cover plate through the fixing ring sleeve to ensure the direct sealing between the cover plate and the valve body.

[0004] Existing check valves generally do not have a slow-closing mechanism, and the action when opening or closing the valve disc is relatively violent and aggressive, which can easily cause the valve disc to violently hit the valve seat and cause wear, resulting in a short service life. In the above-mentioned comparative case, there is also a lack of a certain slow-closing mechanism, so that the valve disc cannot be effectively slow-closed when closing, which not only causes excessive noise, but also affects the service life of the check valve.

[0005] Therefore, it is necessary to invent a check valve with a slow closing structure to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a check valve with a slow closing structure to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a check valve with a slow-closing structure, comprising a valve body, used for conveying a medium;

[0008] A first flange is arranged above the valve body, and a first screw is passed through the periphery of the first flange;

[0009] The valve flap is arranged inside the valve body and is used to block the backflow of the medium. A movable rod is movably arranged on one side of the outer side of the valve body, a connecting rod is fixedly installed on one side of the movable rod, and a valve flap is fixedly connected to one side of the connecting rod;

[0010] A slow closing mechanism, arranged inside the valve body, is used for slow closing of the valve disc;

[0011] Filter plates are movably arranged on both sides of the valve body to filter impurities;

[0012] Block clamps are movably installed on both sides of the valve body and are used to connect the valve body.

[0013] Preferably, a support seat is fixedly installed below the valve body, and the support seat is symmetrically arranged with respect to the center axis of the valve body.

[0014] Preferably, the slow-closing mechanism includes a slow-closing cavity, a telescopic rod is arranged inside the slow-closing cavity, the outside of the telescopic rod is movably connected with a spring, a buffer rod is fixedly installed at one end of the telescopic rod, and limiting grooves are provided on the upper and lower surfaces inside the slow-closing cavity, and the inside of the limiting groove is movably connected with a limiting block.

[0015] Preferably, the limiting groove provided inside the slow closing cavity is slidably connected with the limiting block fixedly installed outside the buffer rod, and the limiting groove and the limiting block are used in coordination.

[0016] Preferably, fixing sleeves are fixedly installed on both sides of the valve body, a grid is movably connected inside the fixing sleeves, a filter plate is fixedly connected inside the grid, and bolts penetrate both sides of the upper side of the grid.

[0017] Preferably, second flanges are fixedly mounted on both sides of the valve body, a sealing ring is movably provided inside the second flange, the block clamp is movably connected to one side of the second flange, and a second screw is passed through the four sides of the block clamp.

[0018] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0019] 1. Through the arrangement of the valve body, movable rod, connecting rod, valve disc and slow closing mechanism, when the medium is transported from the valve body, the impact force of the medium pushes the valve disc to flip. After the medium is transported, the valve disc loses the impact force of the medium and flips down. The buffer rod inside the slow closing mechanism contacts the flipped valve disc, and the telescopic rod and spring behind the buffer rod are arranged to perform telescopic buffering, thereby performing slow closing of the valve disc. Such an arrangement avoids violent and radical actions when opening or closing the valve disc, resulting in collision with the inside of the valve disc and causing wear, thereby increasing the service life of the valve disc;

[0020] 2. Through the arrangement of the valve body, fixed sleeve, mesh frame, filter plate and bolts, some impurities will remain when the medium fluid is transported in the valve body. The filter plates on both sides of the valve body can effectively filter the impurities in the medium. At the same time, the filter plate can be pulled out of the fixed sleeve and the mesh frame by using the arrangement of the mesh frame, so as to facilitate cleaning. The filter plate is connected to the mesh frame by bolts, so as to facilitate the replacement of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the slow-closing mechanism inside the valve body of the utility model;

[0024] Figure 3 This is a schematic diagram of the filter plate structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the block clamp structure of the utility model;

[0026] Figure 5 For the utility model Figure 2 The enlarged diagram of the structure at point A in the middle.

[0027] Description of reference numerals:

[0028] 1. Valve body; 2. Support seat; 3. First flange; 4. First screw; 5. Movable rod; 6. Connecting rod; 7. Valve disc; 8. Slow-closing mechanism; 801. Slow-closing chamber; 802. Telescopic rod; 803. Spring; 804. Buffer rod; 805. Limiting groove; 806. Limiting block; 9. Fixed sleeve; 10. Grid; 11. Filter plate; 12. Bolt; 13. Second flange; 14. Sealing ring; 15. Block clamp; 16. Second screw. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The utility model provides Figure 1-5 A check valve with a slow closing structure shown includes a valve body 1, which is used for conveying a medium;

[0031] A first flange 3 is arranged above the valve body 1, and a first screw 4 is passed through the periphery of the first flange 3;

[0032] The valve flap 7 is arranged inside the valve body 1 and is used to block the backflow of the medium. A movable rod 5 is movably arranged on one side of the outer side of the valve body 1. A connecting rod 6 is fixedly installed on one side of the movable rod 5. A valve flap 7 is fixedly connected to one side of the connecting rod 6.

[0033] A slow closing mechanism 8 is arranged inside the valve body 1 and is used for the valve flap 7 to be slowly closed;

[0034] Filter plates 11 are movably arranged on both sides of the valve body 1 to filter impurities;

[0035] The block clamp 15 is movably installed on both sides of the valve body 1 and is used to connect the valve body 1. The impact force of the medium pushes the valve flap 7 to flip over. When the medium is delivered, the valve flap 7 loses the impact force of the medium and flips down. The buffer rod 804 inside the slow-closing mechanism 8 contacts the flipped valve flap 7. The telescopic rod 802 and the spring 803 behind the buffer rod 804 are configured to perform telescopic buffering, thereby performing slow-closing processing on the valve flap 7. Such a configuration avoids violent and aggressive actions when opening or closing the valve flap 7, resulting in impact on the inside of the valve flap 7 and causing wear, thereby increasing the service life of the valve flap 7.

[0036] like Figure 1 As shown, a support seat 2 is fixedly installed below the valve body 1 , and the support seat 2 is symmetrically arranged with respect to the central axis of the valve body 1 . The valve body 1 can be supported and installed by the support seat 2 .

[0037] like Figure 1 , Figure 2 and Figure 5 As shown, the slow-closing mechanism 8 includes a slow-closing chamber 801, a telescopic rod 802 is arranged inside the slow-closing chamber 801, the outside of the telescopic rod 802 is movably connected with a spring 803, a buffer rod 804 is fixedly installed at one end of the telescopic rod 802, and limiting grooves 805 are provided on the upper and lower surfaces of the interior of the slow-closing chamber 801, and the limiting grooves 805 are movably connected to the limiting blocks 806. When the valve flap 7 is closed, it touches the buffer rod 804, and the buffering effect of the spring 803 is utilized to perform a slow-closing process on the valve flap 7 to avoid excessive flipping force and cause wear inside the valve body 1.

[0038] like Figure 5 As shown, the limit groove 805 opened inside the slow closing cavity 801 and the limit block 806 fixedly installed outside the buffer rod 804 form a sliding connection, and the limit groove 805 and the limit block 806 are used in conjunction with each other. When the buffer rod 804 is in the process of extension and retraction, the limit block 806 outside the buffer rod 804 is used to limit and retract in the limit groove 805, thereby improving stability.

[0039] like Figure 1 and Figure 3 As shown, fixed sleeves 9 are fixedly installed on both sides of the valve body 1, and a grid frame 10 is movably connected inside the fixed sleeve 9. A filter plate 11 is fixedly connected inside the grid frame 10, and bolts 12 penetrate the upper sides of the grid frame 10. By setting the filter plates 11 on both sides of the inside of the valve body 1, impurities in the medium can be effectively filtered. At the same time, by utilizing the setting of the grid frame 10, the filter plate 11 can be pulled out of the fixed sleeve 9 and the fixed sleeve 9, so as to facilitate cleaning, and the filter plate 11 is connected to the grid frame 10 by bolts 12, which is convenient for replacing the filter plate 11.

[0040] like Figure 1 and Figure 4 As shown, second flanges 13 are fixedly installed on both sides of the valve body 1, a sealing ring 14 is movably provided inside the second flange 13, a block clamp 15 is movably connected to one side of the second flange 13, a second screw 16 is passed through the four sides of the block clamp 15, and the block clamp 15 and the second flange 13 are threadedly connected, so that the valve body 1 is conveniently connected to the equipment.

[0041] The working principle of the utility model is as follows: firstly, the valve body 1 and the support seat 2 are installed at the required positions, and then the second flanges 13 on both sides are threadedly connected with the block clamps 15 on the connecting device, and then the medium starts to be transported in the valve body 1. When the medium is transported from one end of the valve body 1, the impurities in the medium are first filtered through the filter plate 11 in the valve body 1. After that, the filtered medium is pushed by the flow pressure to turn over the valve disc 7 and the connecting rod 6 in the valve body 1, and the medium is transported to the filter plate 11 inside the other end for filtering again, and finally the filtered medium is After being transported to the required equipment, when the medium is transported, the valve flap 7 loses the pressure of the medium flow and will automatically flip down. During the flipping process, one end of the valve flap 7 will touch the buffer rod 804, and the buffer rod 804 is pushed by the valve flap 7's own gravity. The telescopic rod 802 and the spring 803 behind the buffer rod 804 play a role of telescopic rebound, which can slowly close the valve flap 7 and avoid the valve flap 7 from hitting the inside of the valve flap 7 and causing wear due to violent and aggressive action when closing the valve flap 7. In this way, the use of the check valve with a slow closing structure is completed.

[0042] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A check valve with a slow closing structure, characterized in that: It comprises a valve body (1) for conveying a medium; A first flange (3) is arranged above the valve body (1), wherein a first screw (4) penetrates the periphery of the first flange (3); A valve flap (7) is arranged inside the valve body (1) and is used to block the backflow of the medium. A movable rod (5) is movably arranged on one side of the outside of the valve body (1). A connecting rod (6) is fixedly installed on one side of the movable rod (5). The valve flap (7) is fixedly connected to one side of the connecting rod (6). A slow closing mechanism (8) is arranged inside the valve body (1) and is used for slow closing of the valve disc (7); Filter plates (11) are movably arranged on both sides of the valve body (1) and are used to filter impurities; The block clamp (15) is movably mounted on both sides of the valve body (1) and is used to connect the valve body (1).

2. A check valve with a slow closing structure according to claim 1, characterized in that: A support seat (2) is fixedly mounted below the valve body (1), and the support seat (2) is symmetrically arranged with respect to the central axis of the valve body (1).

3. A check valve with a slow closing structure according to claim 1, characterized in that: The slow closing mechanism (8) comprises a slow closing chamber (801), a telescopic rod (802) is arranged inside the slow closing chamber (801), a spring (803) is movably connected to the outside of the telescopic rod (802), a buffer rod (804) is fixedly mounted on one end of the telescopic rod (802), and limiting grooves (805) are provided on the upper and lower surfaces inside the slow closing chamber (801), and a limiting block (806) is movably connected to the inside of the limiting groove (805).

4. A check valve with a slow closing structure according to claim 3, characterized in that: The limiting groove (805) provided inside the slow closing cavity (801) and the limiting block (806) fixedly installed outside the buffer rod (804) form a sliding connection, and the limiting groove (805) and the limiting block (806) are used in conjunction with each other.

5. The check valve with slow closing structure according to claim 1, characterized in that: A fixing sleeve (9) is fixedly mounted on both sides of the valve body (1), a mesh frame (10) is movably connected inside the fixing sleeve (9), a filter plate (11) is fixedly connected inside the mesh frame (10), and bolts (12) penetrate through both sides of the upper side of the mesh frame (10).

6. The check valve with slow closing structure according to claim 1, characterized in that: Second flanges (13) are fixedly mounted on both sides of the valve body (1), a sealing ring (14) is movably arranged inside the second flange (13), the block clamp (15) is movably connected to one side of the second flange (13), and a second screw (16) is passed through the four sides of the block clamp (15).

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