A knife gate valve support frame and a knife gate valve

Abstract

The utility model discloses a kind of knife gate valve support frame and knife gate valve, including valve body and knife gate valve support frame. Valve body bottom is equipped with connecting pipeline, both sides symmetrically set sliding slot;Support frame is U-shaped, is attached to the bottom of connecting pipeline, its inside is equipped with the vertical extension limit slide rail, limit slide rail is embedded in sliding slot, so that valve body and support form the sliding connection of vertical direction. The connecting portion of support frame includes first rotary frame and second rotary frame, both are set on the same vertical rotation shaft, can relatively rotate;First rotary frame both ends are equipped with first snap ring, second rotary frame both ends are equipped with second snap ring, rubber gasket is embedded in the inside of snap ring, end portion is equipped with mutually matched boss and groove;Connecting portion is also equipped with buckle, sliding block, spring and pull handle, locking and unlocking are realized by bevel clamping. The structure is convenient to install and disassemble, suitable for the quick fixing and adjustment of pipeline system.

Description

Technical Field

[0001] This utility model relates to the field of knife gate valve technology, specifically to a knife gate valve support frame and a knife gate valve. Background Technology

[0002] In industrial piping systems, knife gate valves are typically installed on existing pipelines via flange bolt connections. Due to the valve body's significant weight, a support structure is required to hold its bottom during installation to maintain its height and assist in aligning the flange holes.

[0003] Currently, commonly used support structures mainly include integral U-shaped brackets or split clamps. Integral brackets must be pre-installed before pipe installation and cannot be added to already connected pipes later. While split clamps can wrap around pipes, their two semi-rings require manual alignment of the ends and individual bolt tightening, a cumbersome process that makes it difficult to guarantee closure accuracy in confined spaces. More importantly, existing split structures lack a reliable automatic locking mechanism, making them prone to loosening due to vibration after installation, thus affecting support stability.

[0004] Therefore, there is an urgent need for a structure that can achieve rapid rotation, automatic alignment and closure, and reliable locking of the support frame without dismantling the existing pipeline, in order to solve the core technical problems of difficult post-installation, low installation efficiency and unreliable connection in the existing technology. Utility Model Content

[0005] The purpose of this utility model is to provide a knife gate valve support frame and a knife gate valve to solve the problems of difficult later installation, low installation efficiency and unreliable connection mentioned in the background art.

[0006] To solve the above problems, this utility model provides the following technical solution:

[0007] A gate valve support frame includes a bracket and a connecting part, wherein the connecting part is disposed at the bottom of the bracket; the connecting part includes a first rotating frame and a second rotating frame rotatably disposed at the bottom of the bracket around the same rotation center, wherein the first rotating frame has a first retaining ring symmetrically disposed at both ends, and the second rotating frame has a second retaining ring symmetrically disposed at both ends, wherein the first retaining ring and the second retaining ring are configured to close around an external pipe to form a closed ring to limit the pipe when the first rotating frame and the second rotating frame rotate relative to each other; the connecting part further includes a locking mechanism for locking the relative position of the first rotating frame and the second rotating frame after the first retaining ring and the second retaining ring are closed.

[0008] Furthermore, the bracket has a rotating shaft vertically disposed at the bottom of the bracket, the rotating shaft vertically passing through the first rotating frame and the second rotating frame in sequence and being rotatably connected to the first rotating frame and the second rotating frame.

[0009] Furthermore, rubber gaskets are embedded on the inner sides of both the first and second retaining rings, and protrusions and grooves are correspondingly provided at the joints of the first and second retaining rings.

[0010] Furthermore, the two first retaining rings are centrally symmetrical about the rotation center of the rotation axis, and the two second retaining rings are centrally symmetrical about the rotation center of the rotation axis.

[0011] Furthermore, the connecting part also has a slot at one end of the second rotating frame, a sliding block is slidably disposed inside the slot, and a spring is embedded inside the slot, the spring being located between the sliding block and the second rotating frame.

[0012] Furthermore, the connecting part also has a buckle provided on the side of the first rotating frame, the buckle engaging with the sliding block, both the buckle and the sliding block having beveled sides, and one end of the sliding block extending to the outside of the second rotating frame and having a pull handle.

[0013] A knife gate valve includes the aforementioned knife gate valve support frame and valve body. The valve body has a connecting pipe at its bottom and sliding grooves on both sides. The support frame is U-shaped and fits against the bottom of the connecting pipe. A vertically extending limiting slide rail is provided on its inner side. The limiting slide rail is embedded in the sliding groove, so that the valve body is slidably connected to the support frame in the vertical direction.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By setting a first rotating frame and a second rotating frame that can rotate around the same rotation center at the bottom of the support, and symmetrically setting a first retaining ring at both ends of the first rotating frame and a second retaining ring at both ends of the second rotating frame, the first and second retaining rings can close together around the external pipe to form a closed loop when the two rotating frames rotate relative to each other, thereby limiting the pipe. This structure allows the support frame to be installed without disassembling the already installed pipe, solving the problem that integral supports cannot be retrofitted later.

[0016] Meanwhile, the locking mechanism in the connecting part can lock the relative positions of the first rotating frame and the second rotating frame after the first retaining ring and the second retaining ring are closed, preventing them from rotating relative to each other or separating during use, thereby maintaining the connection stability between the support frame and the pipeline. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection structure between the support frame and the valve body in this application;

[0018] Figure 2 This is a schematic diagram of the overall support frame structure of this application;

[0019] Figure 3This is a schematic diagram of the overall support frame structure of this application when opened;

[0020] Figure 4 This is a schematic diagram of the support structure in this application;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the second rotating frame in this application;

[0022] Figure 6 This is a schematic diagram of the first rotating frame structure of this application;

[0023] Figure 7 This is a schematic diagram of the valve body structure of this application.

[0024] In the diagram: 1. Bracket; 101. Rotating shaft; 102. Limiting slide rail; 2. Connecting part; 201. First rotating frame; 202. First retaining ring; 203. Buckle; 204. Second rotating frame; 205. Second retaining ring; 206. Recess; 207. Sliding block; 208. Spring; 3. Valve body; 301. Slide groove; 302. Connecting pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] Please see Figures 1-3 This embodiment provides a gate valve support frame, including a bracket 1 and a connecting part 2. The connecting part 2 is disposed at the bottom of the bracket 1.

[0028] The connecting part 2 includes a first rotating frame 201 and a second rotating frame 204. The first rotating frame 201 and the second rotating frame 204 are rotatably mounted on the bottom of the bracket 1 around the same rotation center. The rotation center is a vertical axis, which is formed by a rotating shaft 101. The first rotating frame 201 and the second rotating frame 204 are both sleeved on the rotating shaft 101 and take the rotating shaft 101 as the rotation reference.

[0029] The first rotating frame 201 has symmetrically arranged first retaining rings 202 at both ends, and the second rotating frame 204 has symmetrically arranged second retaining rings 205 at both ends. The first retaining rings 202 and second retaining rings 205 are arc-shaped, and their inner contours are adapted to the outer circumferential surface of the external pipe. When the first rotating frame 201 and the second rotating frame 204 rotate in opposite directions around the rotating axis 101, the first retaining rings 202 and second retaining rings 205 move synchronously, gradually approaching and finally engaging, forming a complete closed ring around the external pipe. This closed ring covers the outer circumference of the pipe, limiting its movement.

[0030] The connecting part 2 also includes a locking mechanism. The locking mechanism is disposed between the first rotating frame 201 and the second rotating frame 204. After the first retaining ring 202 and the second retaining ring 205 are closed, the locking mechanism is activated to fix the relative position of the first rotating frame 201 and the second rotating frame 204, so that the first rotating frame 201 and the second rotating frame 204 are kept in the closed state and no longer rotate relative to each other.

[0031] Please see Figures 4-6 It should be noted that the bottom of the support 1 is provided with a vertically arranged rotating shaft 101. The rotating shaft 101 is a cylindrical rod-shaped component, with its upper end fixedly connected to the central area of ​​the bottom surface of the support 1, and its lower end extending downward in the vertical direction. The rotating shaft 101 passes through the first rotating frame 201 and the second rotating frame 204 in sequence, and forms a rotatable connection with the first rotating frame 201 and the second rotating frame 204. The first rotating frame 201 has a first central hole, and the second rotating frame 204 has a second central hole. The first central hole and the second central hole are coaxially arranged, and their diameters are adapted to the outer diameter of the rotating shaft 101. The rotating shaft 101 passes through the first central hole and the second central hole, so that the first rotating frame 201 and the second rotating frame 204 are sleeved on the rotating shaft 101. The first rotating frame 201 and the second rotating frame 204 are arranged adjacent to each other vertically along the axial direction of the rotating shaft 101, and there is no direct fixed connection between them. They can rotate around the axis of the rotating shaft 101 respectively. This structure allows the first rotating frame 201 and the second rotating frame 204 to share the same rotation center, and their rotational movements are all around the rotation axis 101, with the rotation planes being parallel to each other.

[0032] Furthermore, rubber gaskets are embedded on the inner sides of both the first retaining ring 202 and the second retaining ring 205. The rubber gaskets are made of elastic material, with their outer surface conforming to the inner wall of the first retaining ring 202 or the second retaining ring 205, and their inner surface being an arc surface adapted to the outer circumference of the external pipe. The rubber gaskets extend axially along the retaining rings, covering the main contact area inside the retaining rings, with uniform thickness and edges flush with the inner wall of the retaining rings. The axial length of the rubber gasket is consistent with the width of the retaining ring body, and its inner arc radius matches the outer radius of the external pipe.

[0033] The first retaining ring 202 and the second retaining ring 205 are respectively provided with protrusions and grooves at their mating ends. The first retaining ring 202 has a protrusion on one end face, which protrudes radially outward along the retaining ring, has a rectangular cross-section, its height is flush with the end face of the retaining ring, and its width extends circumferentially along the retaining ring. The corresponding end face of the second retaining ring 205 has a groove, which is a rectangular cavity matching the protrusion, its depth equal to the protrusion height of the protrusion, its width consistent with the circumferential dimension of the protrusion, and its sidewalls perpendicular to the end face. When the first retaining ring 202 and the second retaining ring 205 are closed, the protrusion is fully embedded in the groove, their mating end faces abut against each other, the outer surface of the protrusion contacts the bottom surface of the groove, and the two sides of the protrusion contact the two sidewalls of the groove, respectively.

[0034] Furthermore, the first rotating frame 201 has two first retaining rings 202 at both ends, and the two first retaining rings 202 are centrally symmetrical about the rotation center of the rotating shaft 101. The second rotating frame 204 has two second retaining rings 205 at both ends, and the two second retaining rings 205 are centrally symmetrical about the rotation center of the rotating shaft 101. The two first retaining rings 202 are located on opposite sides of the rotation center, and the distance from their respective geometric centers to the rotation center is equal; similarly, the two second retaining rings 205 are also located on opposite sides of the rotation center, and the distance from their respective geometric centers to the rotation center is equal.

[0035] A straight line connecting the geometric center of any first retaining ring 202 to the center of rotation, extended by the same distance in opposite directions, passes through the geometric center of the other first retaining ring 202; similarly, a straight line connecting the geometric center of any second retaining ring 205 to the center of rotation, extended by the same distance in the opposite direction, passes through the geometric center of the other second retaining ring 205. This arrangement ensures that the two first retaining rings 202 are 180-degree rotationally symmetrical about the center of rotation, and the two second retaining rings 205 are also 180-degree rotationally symmetrical about the center of rotation. Viewed from above, the two first retaining rings 202 are symmetrically distributed along a straight line passing through the center of rotation, and the two second retaining rings 205 are symmetrically distributed along another straight line passing through the center of rotation. The two axes of symmetry are coplanar in the horizontal plane and both pass through the center of rotation.

[0036] In some embodiments, the connecting portion 2 further includes a slot 206 formed at one end of the second rotating frame 204. The slot 206 is a horizontally arranged rectangular blind hole with its opening facing the first rotating frame 201, its bottom closed, and its sidewalls perpendicular to the bottom surface, forming a regular rectangular cavity. The length direction of the slot 206 extends horizontally and is consistent with the relative opening and closing direction of the first rotating frame 201 and the second rotating frame 204.

[0037] A sliding block 207 is laterally slidable inside the slot 206. The sliding block 207 has a rectangular parallelepiped shape, and its height and width are adapted to the cross-sectional dimensions of the inner cavity of the slot 206. The sliding block 207 can slide laterally within the slot 206. The end of the sliding block 207 near the opening of the slot 206 has an end face, which is located in the outer region of the second rotating frame 204.

[0038] A spring 208 is embedded inside the slot 206. The spring 208 is a helical compression spring, and its axis coincides with the transverse center line of the slot 206. The spring 208 is located between the sliding block 207 and the second rotating frame 204. One end of the spring 208 abuts against the inner end face of the sliding block 207, and the other end abuts against the bottom wall of the slot 206. The spring 208 is in a compressed state after assembly.

[0039] Furthermore, the connecting part 2 also has a latch 203 disposed on the side of the first rotating frame 201. The latch 203 is a block-shaped structure protruding outward from the side wall of the first rotating frame 201, and its overall outline matches the end of the sliding block 207. The latch 203 is engaged with the sliding block 207.

[0040] The buckle 203 has a beveled side, and the corresponding side of the sliding block 207 also has a beveled side. Both bevels are arranged laterally, with their upper ends close to the rotation center of the rotating shaft 101 and their lower ends away from the rotation center. The bevels are in the same direction. In the engaged state, the two bevels are in contact with each other, and the contact surface is a plane.

[0041] One end of the sliding block 207 extends to the outside of the second rotating frame 204, and a pull handle 210 is fixedly provided at this end. The pull handle 210 has a cylindrical structure, and its axis is consistent with the sliding direction of the sliding block 207, that is, it extends along the transverse center line of the slot 206. The outer diameter of the pull handle 210 is larger than the width of the opening of the slot 206. The pull handle 210 and the sliding block 207 are an integral structure.

[0042] Viewed from above, the buckle 203 is located on the side of the first rotating frame 201 closer to the second rotating frame 204, and the pull handle 210 is located on the outer side of the second rotating frame 204 away from the first rotating frame 201. The two are distributed along the same straight line in the horizontal plane, which is perpendicular to the axis of the rotating shaft 101.

[0043] This embodiment provides a knife gate valve, including the aforementioned knife gate valve support frame and valve body 3. The valve body 3 is a shell structure, with a connecting pipe 301 at its bottom. The connecting pipe 301 is cylindrical, and its axis is arranged vertically. The left and right sides of the valve body 3 are symmetrically provided with sliding grooves 302, which extend along the height direction of the valve body 3 and have a rectangular cross-section.

[0044] The bracket 1 has a U-shaped structure, consisting of a base plate and two side arms integrally formed, with its opening facing upwards, surrounding the lower area of ​​the connecting pipe 301. The inner surface of the base plate of the bracket 1 is fitted to the bottom outer circumference of the connecting pipe 301. Vertically extending limiting slide rails 102 are respectively provided on the inner sides of the two side arms of the bracket 1. The limiting slide rails 102 are arranged along the height direction of the bracket 1, extending from the bottom of the bracket 1 to a position near the top. The limiting slide rail 102 has a rectangular cross-section, with its width matching the width of the groove 302 and its height matching the depth of the groove 302.

[0045] The slide groove 302 is a rectangular groove that matches the limiting slide rail 102, and its inner wall surface is flat. In the assembled state, the limiting slide rail 102 is embedded in the slide groove 302, the outer side of the limiting slide rail 102 contacts the inner side of the slide groove 302, and the top surface of the limiting slide rail 102 is flush with the top surface of the slide groove 302 or has an assembly gap. This structure allows the valve body 3 and the bracket 1 to form a vertical sliding connection, and the valve body 3 can move relative to the bracket 1 along the length direction of the limiting slide rail 102.

[0046] Working principle:

[0047] The first rotating frame 201 and the second rotating frame 204 are mounted on the same vertically arranged rotating shaft 101, adjacent to each other axially, and can rotate independently around the axis of the rotating shaft 101. The first retaining ring 202 at both ends of the first rotating frame 201 and the second retaining ring 205 at both ends of the second rotating frame 204 are centrally symmetrically distributed around the center of rotation. When the first rotating frame 201 and the second rotating frame 204 rotate relative to each other, the first retaining ring 202 and the second retaining ring 205 move along a circular trajectory, gradually approaching each other from an open state, and finally closing around the outer periphery of the outer pipe to form a closed loop structure.

[0048] During the closing process, the protrusion at the end of the first retaining ring 202 enters the groove at the end of the second retaining ring 205. The outer side of the protrusion contacts the bottom surface of the groove, and the two sides contact the sidewalls of the groove. Simultaneously, the latch 203 and the sliding block 207 located on the side of the first rotating frame 201 approach each other. The inclined surface of the latch 203 contacts the inclined surface of the sliding block 207. The two inclined surfaces are arranged laterally, with the upper end close to the center of rotation and the lower end away from the center of rotation. The sliding block 207, within the retaining groove 206, is held in an extended position towards the latch 203 by the action of the spring 208, ensuring a stable engagement.

[0049] The connecting pipe 301 at the bottom of the valve body 3 is located within the U-shaped opening of the bracket 1, and the bottom surface of the bracket 1 is in contact with the outer circumferential surface of the bottom of the connecting pipe 301. The sliding grooves 302 on both sides of the valve body 3 engage with the limiting slide rails 102 on the inner side of the bracket 1. The limiting slide rails 102 are vertically extending rectangular protrusions, and the sliding grooves 302 are matching rectangular recesses. When the valve body 3 is subjected to external force, it moves vertically, and the sliding grooves 302 slide relative to the limiting slide rails 102. The valve body 3 moves vertically within the bracket 1, and the movement path is limited by the engagement of the limiting slide rails 102 and the sliding grooves 302, while its horizontal position remains unchanged.

[0050] The handle 210 is fixed to one end of the sliding block 207 that extends to the outside of the second rotating frame 204. When the operator applies external force to the handle 210, the sliding block 207 overcomes the compression force of the spring 208 and slides into the slot 206. The inclined surface disengages, the buckle 203 is released from the sliding block 207, the first rotating frame 201 and the second rotating frame 204 regain relative rotational freedom, and the first retaining ring 202 and the second retaining ring 205 can reopen and disengage from the external pipe.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0052] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A knife gate valve support frame, characterized in that, include: support; A connecting part is provided at the bottom of the bracket; The connecting part includes a first rotating frame and a second rotating frame that are rotatably disposed at the bottom of the support about the same rotation center. The first rotating frame has first retaining rings symmetrically arranged at both ends, and the second rotating frame has second retaining rings symmetrically arranged at both ends. The first retaining ring and the second retaining ring are configured such that when the first rotating frame and the second rotating frame rotate relative to each other, they can close together around the external pipe to form a closed ring to limit the pipe. The connecting part also includes a locking mechanism for locking the relative positions of the first rotating frame and the second rotating frame after the first retaining ring and the second retaining ring are closed.

2. The gate valve support frame according to claim 1, characterized in that: The bracket has a rotating shaft vertically arranged at the bottom of the bracket, and the rotating shaft vertically passes through the first rotating frame and the second rotating frame in sequence and is rotatably connected to the first rotating frame and the second rotating frame.

3. The gate valve support frame according to claim 1, characterized in that: Both the first and second retaining rings have rubber pads embedded on their inner sides, and the joints between the first and second retaining rings are provided with protrusions and grooves.

4. A gate valve support frame according to claim 2, characterized in that: The two first retaining rings are centrally symmetrical about the rotation center of the rotation axis, and the two second retaining rings are centrally symmetrical about the rotation center of the rotation axis.

5. A gate valve support frame according to claim 1, characterized in that: The connecting part also has a slot at one end of the second rotating frame. A sliding block is slidably disposed inside the slot, and a spring is embedded inside the slot. The spring is located between the sliding block and the second rotating frame.

6. A gate valve support frame according to claim 5, characterized in that: The connecting part also has a buckle provided on the side of the first rotating frame. The buckle is engaged with the sliding block. Both the buckle and the sliding block have beveled sides. One end of the sliding block extends to the outside of the second rotating frame and is provided with a pull handle.

7. A knife gate valve, characterized in that: The device includes a gate valve support frame and a valve body as described in any one of claims 1-6. The valve body has a connecting pipe at its bottom and sliding grooves on both sides. The support frame is U-shaped and fits against the bottom of the connecting pipe. A vertically extending limiting slide rail is provided on its inner side. The limiting slide rail is embedded in the sliding groove, so that the valve body is slidably connected to the support frame in the vertical direction.

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