Knife gate valve with positioning device

Abstract

The utility model provides a knife gate valve with a positioning device, and relates to the technical field of knife gate valves. The utility model comprises a U-shaped frame, a cylinder is fixedly connected to the U-shaped frame, a valve is fixedly connected to the piston rod of the cylinder, a valve body is fixedly connected to the U-shaped frame, a valve cover is fixedly connected to the valve body, the piston rod of the cylinder is slidably connected to the valve cover, a positioner is fixedly connected to the U-shaped frame, a sealing structure is arranged on the valve body, the sealing structure is mainly composed of an air bag, and the air bag is arranged in a groove of the valve body. The utility model solves the problem that many knife gate valves currently have poor sealing effect between the gate plate and the valve body because the sealing surface can only rely on the medium pressure to seal when closed, especially the one-way sealing knife gate valve, because the gate plate will cause looseness between components during the extrusion process, and the structure is not compact enough, resulting in leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of knife gate valves, in particular to a knife gate valve with a positioning device. Background Art

[0002] The knife gate valve is also called the knife-type gate valve, knife-gate gate valve, slurry valve, and mud valve. Its opening and closing parts are the gate plates. The movement direction of the gate plates is perpendicular to the direction of the fluid, and the medium is cut off by the blade-shaped gate plates that can cut the fiber materials.

[0003] When using the current knife gate valves, staff often find that: when many knife gate valves are closed, the sealing surface can only rely on the medium pressure to seal, and the sealing effect between the gate and the valve body is not good, especially the one-way sealing knife gate valve. Because the gate will cause looseness between components during the extrusion process, the structure is not compact enough, resulting in leakage. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a knife gate valve with a positioning device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a knife gate valve with a positioning device, comprising a U-shaped frame, a cylinder is fixedly connected to the U-shaped frame, a valve is fixedly connected to the piston rod of the cylinder, a valve body is fixedly connected to the U-shaped frame, a valve cover is fixedly connected to the valve body, the piston rod of the cylinder is slidably connected to the valve cover, a positioner is fixedly connected to the U-shaped frame, a sealing structure is arranged on the valve body, the sealing structure is mainly composed of an air bag, and the air bag is arranged in a groove of the valve body.

[0006] The effect achieved by the above components is: install the device, start the cylinder to drive the valve down to the groove on the valve body, so as to cut off and block the medium. When the valve enters the groove, it will squeeze the airbag. At this time, the airbag will deform and wrap the edge of the valve to improve the sealing effect, thereby avoiding the problem that many knife gate valves currently have poor sealing effect between the gate and the valve body because the sealing surface can only rely on the medium pressure to seal when closed, especially the one-way sealing knife gate valve. During the extrusion process, the gate will cause looseness between the components and the structure is not compact enough, resulting in leakage.

[0007] Preferably, an arc-shaped plate is fixedly connected in the groove of the valve body, and the arc-shaped plate is fixedly connected to the airbag.

[0008] The effect achieved by the above components is that the arc plate can limit the position of the airbag to prevent the airbag from shifting in the groove, which would cause the sealing effect to deteriorate.

[0009] Preferably, installation grooves are respectively provided on both sides of the valve, and sealing gaskets are clamped in the installation grooves.

[0010] The effects achieved by the above components are: the sealing gasket installed in the installation groove can further improve the sealing effect, and when the sealing gasket is damaged, it can be easily replaced.

[0011] Preferably, a plurality of connection grooves are provided in the installation groove, a plurality of connection columns are fixedly connected to the sealing gasket, and the connection grooves are adapted to the connection columns in size.

[0012] The effect achieved by the above components is that the position of the sealing gasket can be more stable by inserting a plurality of connecting posts into corresponding connecting grooves.

[0013] Preferably, a filter structure is provided on the valve body, and the filter structure is mainly composed of a filter plate, and the filter plate is provided on one side of the valve body.

[0014] The effects achieved by the above components are: the filter plate can filter the medium, thereby improving the practicability of the device.

[0015] Preferably, four rectangular grooves are formed at one end of the valve body, four rectangular blocks are fixedly connected to the filter plate, and the rectangular grooves are adapted to the size of the rectangular blocks.

[0016] The effect achieved by the above components is that the filter plate can be installed by inserting the rectangular block into the corresponding rectangular groove, and it is also convenient to replace it according to different media.

[0017] Preferably, a sliding plate is slidably inserted into the rectangular groove.

[0018] The effects achieved by the above components are: the sliding plate can limit the rectangular block, thereby limiting the filter plate, making the installation of the filter plate more stable.

[0019] Preferably, two springs are fixedly connected to the sliding plate, and one end of the spring is fixedly connected to the valve body.

[0020] The effect achieved by the above components is that when the sliding plate limits the filter plate, the spring is in a contracted state, so the rebound elastic force of the spring acts on the sliding plate, which can further improve the limiting effect.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are that, in the utility model, by setting a sealing structure, when the valve enters the groove, the airbag will be squeezed, and the airbag will be deformed to wrap the edge of the valve to improve the sealing effect. The arc plate can limit the airbag to prevent the airbag from shifting in the groove and causing the sealing effect to deteriorate. The sealing gasket is installed in the installation groove to further improve the sealing effect, and when the sealing gasket is damaged, it can be convenient to replace it. By inserting several connecting columns into the corresponding connecting grooves, the position of the sealing gasket can be made more stable, thereby avoiding the problem that many current knife gate valves can only rely on the medium pressure to seal the sealing surface when closed, and the sealing effect between the gate plate and the valve body is not good, especially the one-way sealing knife gate valve, because the gate plate will cause looseness between components during the extrusion process, and the structure is not compact enough, resulting in leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional structural schematic diagram of a knife gate valve with a positioning device is proposed for the utility model;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a knife gate valve with a positioning device from another perspective is provided for the utility model;

[0024] Figure 3 A partial schematic diagram of a sealing structure of a knife gate valve with a positioning device proposed by the utility model;

[0025] Figure 4 The utility model provides a partial schematic diagram of a filtering structure of a knife gate valve with a positioning device.

[0026] Legend: 1. U-shaped frame; 2. Cylinder; 3. Valve body; 4. Valve cover; 5. Valve; 6. Positioner; 7. Sealing structure; 71. Air bag; 72. Arc plate; 73. Mounting groove; 74. Sealing gasket; 75. Connecting groove; 76. Connecting column; 8. Filter structure; 81. Filter plate; 82. Rectangular groove; 83. Rectangular block; 84. Sliding plate; 85. Spring. DETAILED DESCRIPTION

[0027] Embodiment 1, as Figure 1 and Figure 2 As shown, a knife gate valve with a positioning device includes a U-shaped frame 1, a cylinder 2 is fixedly connected to the U-shaped frame 1, a valve 5 is fixedly connected to the piston rod of the cylinder 2, a valve body 3 is fixedly connected to the U-shaped frame 1, a valve cover 4 is fixedly connected to the valve body 3, the piston rod of the cylinder 2 is slidably connected to the valve cover 4, and a positioner 6 is fixedly connected to the U-shaped frame 1.

[0028] Reference Figure 2 and Figure 3, a sealing structure 7 is provided on the valve body 3, and the sealing structure 7 is mainly composed of an air bag 71. The air bag 71 is arranged in the groove of the valve body 3. After the device is installed, the valve 5 is driven to descend into the groove on the valve body 3 by starting the cylinder 2, which has the effect of cutting off and blocking the medium. When the valve 5 enters the groove, the air bag 71 will be squeezed. At this time, the air bag 71 will deform and wrap the edge of the valve 5 to improve the sealing effect, thereby avoiding the current situation that many knife gate valves can only rely on the medium pressure to seal the sealing surface when closing, and the sealing effect between the gate and the valve body 3 is not good, especially the one-way sealing knife gate valve. Because the gate will cause looseness between the components during the extrusion process, the structure is not compact enough, and leakage occurs, and the valve An arc plate 72 is fixedly connected in the groove of the body 3, and the arc plate 72 is fixedly connected to the airbag 71. The arc plate 72 can limit the airbag 71 to prevent the airbag 71 from being displaced in the groove and causing the sealing effect to deteriorate. Mounting grooves 73 are respectively provided on both sides of the valve 5, and a sealing gasket 74 is clamped in the mounting groove 73. The sealing gasket 74 is installed in the mounting groove 73 to further improve the sealing effect, and when the sealing gasket 74 is damaged, it can be convenient to replace it. A number of connecting grooves 75 are provided in the mounting groove 73, and a number of connecting columns 76 are fixedly connected to the sealing gasket 74. The connecting grooves 75 are adapted to the connecting columns 76 in size. By clamping a number of connecting columns 76 into the corresponding connecting grooves 75, the position of the sealing gasket 74 can be made more stable.

[0029] Reference Figure 4 , a filter structure 8 is provided on the valve body 3, and the filter structure 8 is mainly composed of a filter plate 81. The filter plate 81 is arranged on one side of the valve body 3, and the filter plate 81 can filter the medium, thereby improving the practicality of the device. Four rectangular grooves 82 are provided at one end of the valve body 3, and four rectangular blocks 83 are fixedly connected to the filter plate 81. The rectangular grooves 82 are adapted to the sizes of the rectangular blocks 83. The rectangular blocks 83 are inserted into the corresponding rectangular grooves 82, and the filter plate 81 can be installed, which is also convenient for replacement according to different media. A sliding plate 84 is slidably inserted in the rectangular groove 82, and the sliding plate 84 can limit the rectangular blocks 83, thereby limiting the filter plate 81, making the installation of the filter plate 81 more stable. Two springs 85 are fixedly connected to the sliding plate 84, and one end of the spring 85 is fixedly connected to the valve body 3. When the sliding plate 84 limits the filter plate 81, the spring 85 is in a contracted state, so the rebound elastic force of the spring 85 acts on the sliding plate 84, which can further improve the limiting effect.

[0030] Working principle: install the device, start the cylinder 2 to drive the valve 5 down to the groove on the valve body 3, so as to cut off and block the medium. When the valve 5 enters the groove, it will squeeze the airbag 71. At this time, the airbag 71 will deform and wrap the edge of the valve 5 to improve the sealing effect, thereby avoiding the current situation that many knife gate valves can only rely on the medium pressure to seal the sealing surface when they are closed, and the sealing effect between the gate and the valve body 3 is not good, especially the one-way sealing knife gate valve. Because the gate will cause looseness between the components during the extrusion process, the structure is not compact enough, and leakage occurs. The arc plate 72 can limit the airbag 71 to prevent the airbag 71 from shifting in the groove and causing the sealing effect to deteriorate. The sealing gasket 74 is installed The sealing effect can be further improved in the installation groove 73, and when the sealing gasket 74 is damaged, it can be convenient to replace it. By inserting several connecting columns 76 into the corresponding connecting grooves 75, the position of the sealing gasket 74 can be more stable. The filter plate 81 can filter the medium, which improves the practicality of the device. The rectangular block 83 is inserted into the corresponding rectangular groove 82, and the filter plate 81 can be installed, which is also convenient for replacement according to different media. The sliding plate 84 can limit the rectangular block 83, thereby limiting the filter plate 81, making the installation of the filter plate 81 more stable. When the sliding plate 84 limits the filter plate 81, the spring 85 is in a contracted state, so the rebound elastic force of the spring 85 acts on the sliding plate 84, which can further improve the limiting effect.

[0031] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

Claims

1. A knife gate valve with a positioning device, comprising a U-shaped frame (1), characterized in that: The U-shaped frame (1) is fixedly connected to a cylinder (2), the piston rod of the cylinder (2) is fixedly connected to a valve (5), the U-shaped frame (1) is fixedly connected to a valve body (3), the valve body (3) is fixedly connected to a valve cover (4), the piston rod of the cylinder (2) is slidably connected to the valve cover (4), the U-shaped frame (1) is fixedly connected to a positioner (6), and the valve body (3) is provided with a sealing structure (7), the sealing structure (7) mainly consisting of an air bag (71), and the air bag (71) is provided in a groove of the valve body (3).

2. The knife gate valve with a positioning device according to claim 1, characterized in that: An arc-shaped plate (72) is fixedly connected in the groove of the valve body (3), and the arc-shaped plate (72) is fixedly connected to the airbag (71).

3. The knife gate valve with a positioning device according to claim 2, characterized in that: The valve (5) is provided with mounting grooves (73) on both sides, respectively, and sealing pads (74) are clamped in the mounting grooves (73).

4. The knife gate valve with a positioning device according to claim 3, characterized in that: A plurality of connection grooves (75) are provided in the installation groove (73), a plurality of connection pillars (76) are fixedly connected to the sealing gasket (74), and the connection grooves (75) and the connection pillars (76) are matched in size.

5. The knife gate valve with a positioning device according to claim 4, characterized in that: The valve body (3) is provided with a filtering structure (8), wherein the filtering structure (8) is mainly composed of a filtering plate (81), and the filtering plate (81) is arranged on one side of the valve body (3).

6. The knife gate valve with a positioning device according to claim 5, characterized in that: One end of the valve body (3) is provided with four rectangular grooves (82), and four rectangular blocks (83) are fixedly connected to the filter plate (81), and the rectangular grooves (82) are adapted in size to the rectangular blocks (83).

7. The knife gate valve with a positioning device according to claim 6, characterized in that: A sliding plate (84) is slidably inserted into the rectangular groove (82).

8. The knife gate valve with a positioning device according to claim 7, characterized in that: Two springs (85) are fixedly connected to the sliding plate (84), and one end of the spring (85) is fixedly connected to the valve body (3).

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