Dismounting device for packing gland of large gate valve
By designing the disassembly device of the bracket and top wire, the problem of difficulty and damage of the bulkhead pressure gland of large gate valves is solved, and a fast and safe disassembly process is achieved to ensure production continuity.
Patent Information
- Application Number
- CN202422055553.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The packing glands of the medium and large gate valves in the prior art are difficult to disassemble and are prone to damage, which affects the production rhythm, and is even more difficult especially when rust slag accumulation.
A disassembly device including a bracket, a chuck and a top wire is designed. The chuck is inserted between the packing gland and the valve, and the top wire is tightened and rotated to pull out the packing gland to avoid a direct prying operation.
The packing gland is quickly and safely disassembled, avoiding damage to the packing gland and ensuring production continuity.
Smart Images
Figure CN223115085U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valve maintenance and repair, in particular to a disassembly device for a stuffing box gland of a large gate valve. Background Technique
[0002] In the process of maintaining and repairing valves in industrial pipeline systems. A gate valve is a commonly used shut-off valve for controlling the flow of fluids in pipelines. In the design of a gate valve, the stuffing box is one of the key components, which is located between the valve stem and the valve body and is used to prevent fluid leakage. The stuffing box gland is an important component for pressing the packing to ensure its sealing performance.
[0003] Over time and with frequent use, the packing of the gate valve may wear or be damaged, resulting in leakage. At this time, it is necessary to add, replace or adjust the packing, which involves the disassembly of the stuffing box gland. Since long-term water leakage will cause the stuffing box of the gate valve and the stuffing box gland to be filled with rust slag, impurities, etc., it will be very difficult to disassemble the stuffing box gland at this time. Currently, we mainly use a crowbar to pry or a hammer to hit when disassembling the stuffing box gland. Because many stuffing box glands are cast from cast iron, using such a method to disassemble is extremely likely to cause damage to the stuffing box gland. Large gate valves are usually used in the main pipeline systems of various media and cannot stop the medium for a long time. Once the stuffing box gland is damaged during disassembly, it is very easy to affect the production rhythm of the company without a spare stuffing box gland.
[0004] Therefore, it has become an urgent task to study how to quickly and safely disassemble the stuffing box gland. Content of the Utility Model
[0005] The purpose of the utility model is to provide a disassembly device for a stuffing box gland of a large gate valve to solve the problems existing in the above-mentioned prior art, with a simple structure, convenient use, and effectively avoiding damage to the stuffing box gland.
[0006] To achieve the above purpose, the utility model provides the following scheme:
[0007] The utility model provides a disassembly device for a stuffing box gland of a large gate valve, including: a bracket, a chuck and a jackscrew. The bracket includes a first support arm, a second support arm and a connecting frame. The top of the first support arm is integrally and fixedly connected to one end of the connecting frame, and the top of the second support arm is integrally and fixedly connected to the other end of the connecting frame; the chuck is used for detachably clamping in the gap between the stuffing box gland of the large gate valve and the valve, and both ends of the chuck are respectively slidably connected to the bracket and can maintain the position after sliding; a threaded hole is provided in the middle of the connecting frame, and the jackscrew is used for being threadedly connected to the threaded hole, and one end of the jackscrew passing through the threaded hole is used for pressing against the top end of the valve stem. Rotating the jackscrew can cause the chuck to pull out the stuffing box gland.
[0008] Preferably, a hexagonal prism cap is provided at the top of the setscrew.
[0009] Preferably, the chuck includes a first clamping plate and a second clamping plate. A first clamping groove is provided in the middle of the first clamping plate, and a second clamping groove is provided in the middle of the second clamping plate. The first clamping plate and the second clamping plate are detachably and fixedly connected.
[0010] Preferably, it further includes a first fixing bolt, a first nut, a second fixing bolt and a second nut. A first through hole and a second through hole are provided on both sides of the first clamping groove, and a third through hole and a fourth through hole are provided on both sides of the second clamping groove. The first fixing bolt is used to pass through the first through hole and the third through hole and then threadedly connect with the first nut. The second fixing bolt is used to pass through the second through hole and the fourth through hole and threadedly connect with the second nut so that the first clamping groove and the second clamping groove are clamped in the gap between the packing gland of the large gate valve and the valve.
[0011] Preferably, it further includes a third fixing bolt, a third nut, a fourth fixing bolt and a fourth nut. A plurality of first adjustment holes are uniformly provided on the first support arm, and a plurality of second adjustment holes are uniformly provided on the second support arm. One of the first adjustment holes and one of the second adjustment holes are correspondingly arranged. Fifth through holes and sixth through holes are respectively provided at both ends of the first clamping plate, and seventh through holes and eighth through holes are provided at both ends of the second clamping plate. The third fixing bolt is used to pass through the fifth through hole, one of the first adjustment holes and the seventh through hole and then threadedly connect with the third nut. The fourth fixing bolt is used to pass through the sixth through hole, one of the second adjustment holes and the eighth through hole and then threadedly connect with the fourth nut.
[0012] Preferably, it further includes a top plate and a jack. Both ends of the top plate are detachably and fixedly connected to the first support arm and the second support arm respectively. The bottom of the jack is used to tightly press against the top plate, and the movable end of the jack is used to tightly press against the top end of the valve stem. When the jack extends, the chuck can pull out the packing gland.
[0013] Preferably, the top plate includes a first plate member, a second plate member, a fifth fixing bolt, a fifth nut, a sixth fixing bolt and a sixth nut. Ninth through holes and tenth through holes are respectively provided at both ends of the first plate member, and eleventh through holes and twelfth through holes are respectively provided at both ends of the second plate member. The fifth fixing bolt is used to pass through the ninth through hole, one of the first adjustment holes and the eleventh through hole and then threadedly connect with the fifth nut. The sixth fixing bolt is used to pass through the tenth through hole, one of the second adjustment holes and the twelfth through hole and then threadedly connect with the sixth nut.
[0014] The utility model has achieved the following technical effects compared with the prior art:
[0015] The utility model provides a disassembly device for the stuffing box gland of a large gate valve. First, insert the chuck into the gap between the stuffing box gland and the valve, then fix the chuck and the bracket, then screw the jackscrew into the threaded hole and press it against the top of the valve stem. Adjust the position and continue to tighten the jackscrew, and slowly pull out the stuffing box gland driven by the jackscrew. The structure is simple and easy to use, effectively avoiding damage to the stuffing box gland. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 is a schematic structural diagram of the disassembly device for the stuffing box gland of a large gate valve provided by the present utility model;
[0018] In the figure: 1, jackscrew; 2, threaded hole; 3, second support arm; 4, first adjustment hole; 5, top plate; 6, fifth fixing bolt; 7, fifth nut; 8, first fixing bolt; 9, first nut; 10, chuck; 11, fourth nut; 12, fourth fixing bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.
[0020] The purpose of the present utility model is to provide a disassembly device for the stuffing box gland of a large gate valve to solve the problems existing in the above-mentioned prior art. The structure is simple and easy to use, effectively avoiding damage to the stuffing box gland.
[0021] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.
[0022] The present utility model provides a disassembly device for the stuffing box gland of a large gate valve, as Figure 1As shown in the figure, it includes: a bracket, a chuck 10 and a setscrew 1. The bracket includes a first support arm, a second support arm 3 and a connecting frame. The top of the first support arm is integrally and fixedly connected to one end of the connecting frame, and the top of the second support arm 3 is integrally and fixedly connected to the other end of the connecting frame; the chuck 10 is used to be detachably clamped in the gap between the packing gland of a large gate valve and the valve, and both ends of the chuck 10 are slidably connected to the bracket and can maintain the position after sliding; a threaded hole 2 is provided in the middle of the connecting frame, and the setscrew 1 is used to be threadedly connected to the threaded hole 2, and one end of the setscrew 1 passing through the threaded hole 2 is used to press against the top of the valve stem. By rotating the setscrew 1, the chuck 10 can pull out the packing gland. First, insert the chuck 10 into the gap between the packing gland and the valve, then fix the chuck 10 and the bracket, then screw the setscrew 1 into the threaded hole 2 and press against the top of the valve stem, adjust the position and continue to tighten the setscrew 1. Driven by the setscrew 1, slowly pull out the packing gland. The structure is simple and easy to use, effectively avoiding damage to the packing gland.
[0023] In a preferred embodiment, a hexagonal prism cap is provided on the top of the setscrew 1, which is convenient to be used in combination with a wrench, thus making it convenient to use.
[0024] In a preferred embodiment, the chuck 10 includes a first clamping plate and a second clamping plate. A first clamping groove is provided in the middle of the first clamping plate, and a second clamping groove is provided in the middle of the second clamping plate. The first clamping plate and the second clamping plate are detachably fixedly connected. The structure is simple and easy to use.
[0025] In a preferred embodiment, it further includes a first fixing bolt 8, a first nut 9, a second fixing bolt and a second nut. A first through hole and a second through hole are provided on both sides of the first clamping groove, and a third through hole and a fourth through hole are provided on both sides of the second clamping groove. The first fixing bolt 8 is used to pass through the first through hole and the third through hole and then be threadedly connected to the first nut 9, and the second fixing bolt is used to pass through the second through hole and the fourth through hole and be threadedly connected to the second nut to clamp the first clamping groove and the second clamping groove in the gap between the packing gland of the large gate valve and the valve. The structure is simple and convenient to clamp in the gap between the packing gland of the large gate valve and the valve.
[0026] In a preferred embodiment, the large gate valve packing gland disassembly device further includes a third fixing bolt, a third nut, a fourth fixing bolt 12 and a fourth nut 11. A plurality of first adjustment holes 4 are uniformly arranged on the first support arm, and a plurality of second adjustment holes are uniformly arranged on the second support arm 3. One first adjustment hole 4 is correspondingly arranged with one second adjustment hole. The two ends of the first clamping plate are respectively provided with a fifth through hole and a sixth through hole, and the two ends of the second clamping plate are provided with a seventh through hole and an eighth through hole. The third fixing bolt is used to pass through the fifth through hole, one first adjustment hole 4 and the seventh through hole and then be threadedly connected with the third nut. The fourth fixing bolt 12 is used to pass through the sixth through hole, one second adjustment hole and the eighth through hole and then be threadedly connected with the fourth nut 11. The structure is simple, the materials are convenient to obtain, and it is convenient to adjust the relative position between the clamping plate and the bracket.
[0027] In a preferred embodiment, the large gate valve packing gland disassembly device further includes a top plate 5 and a jack. The two ends of the top plate 5 are respectively detachably and fixedly connected to the first support arm and the second support arm 3. The bottom of the jack is used to tightly press against the top plate 5, and the movable end of the jack is used to tightly press against the top end of the valve stem. When the jack extends, the chuck 10 can pull out the packing gland. The structure is simple and the materials are convenient to obtain. When the situation of the packing gland being severely rusted occurs and the packing gland cannot be pulled out by using the jackscrew 1, at this time, the jackscrew 1 is removed, then the top plate 5 is installed at a position at a certain height from the chuck 10, and then the jack is placed between the top end of the valve stem and the top plate 5, and the packing gland is pulled out by controlling the extension amount of the jack.
[0028] In a preferred embodiment, the top plate 5 includes a first plate member, a second plate member, a fifth fixing bolt 6, a fifth nut 7, a sixth fixing bolt and a sixth nut. The two ends of the first plate member are respectively provided with a ninth through hole and a tenth through hole, and the two ends of the second plate member are respectively provided with an eleventh through hole and a twelfth through hole. The fifth fixing bolt 6 is used to pass through the ninth through hole, one first adjustment hole 4 and the eleventh through hole and then be threadedly connected with the fifth nut 7. The sixth fixing bolt is used to pass through the tenth through hole, one second adjustment hole and the twelfth through hole and then be threadedly connected with the sixth nut. The structure is simple and it is convenient to adjust the position of the top plate 5.
[0029] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A disassembly device for the packing gland of a large gate valve, characterized in that: Comprising: A bracket, the bracket includes a first support arm, a second support arm and a connecting frame. The top of the first support arm is integrally and fixedly connected to one end of the connecting frame, and the top of the second support arm is integrally and fixedly connected to the other end of the connecting frame; A chuck, the chuck is used to be detachably clamped in the gap between the packing gland of a large gate valve and the valve, and both ends of the chuck are respectively slidably connected to the bracket and can maintain the position after sliding; and A setscrew, a threaded hole is provided in the middle of the connecting frame. The setscrew is used to be threadedly connected to the threaded hole, and one end of the setscrew passing through the threaded hole is used to tighten the top end of the valve stem. Rotating the setscrew can make the chuck pull out the packing gland.
2. The large gate valve packing gland disassembly device according to claim 1, characterized in that: A hexagonal prism cap is provided at the top of the setscrew.
3. The large gate valve packing gland disassembly device according to claim 1, characterized in that: The chuck includes a first clamping plate and a second clamping plate. A first clamping groove is provided in the middle of the first clamping plate, and a second clamping groove is provided in the middle of the second clamping plate. The first clamping plate and the second clamping plate are detachably fixedly connected.
4. The large gate valve packing gland disassembly device according to claim 3, characterized in that: It further includes a first fixing bolt, a first nut, a second fixing bolt and a second nut. A first through hole and a second through hole are provided on both sides of the first clamping groove, and a third through hole and a fourth through hole are provided on both sides of the second clamping groove. The first fixing bolt is used to pass through the first through hole and the third through hole and then be threadedly connected to the first nut. The second fixing bolt is used to pass through the second through hole and the fourth through hole and be threadedly connected to the second nut so that the first clamping groove and the second clamping groove are clamped in the gap between the packing gland of the large gate valve and the valve.
5. The large gate valve packing gland disassembly device according to claim 4, characterized in that: It further includes a third fixing bolt, a third nut, a fourth fixing bolt and a fourth nut. A plurality of first adjustment holes are evenly provided on the first support arm, and a plurality of second adjustment holes are evenly provided on the second support arm. One first adjustment hole and one second adjustment hole are correspondingly arranged. Fifth through holes and sixth through holes are respectively provided at both ends of the first clamping plate, and seventh through holes and eighth through holes are provided at both ends of the second clamping plate. The third fixing bolt is used to pass through the fifth through hole, one first adjustment hole and the seventh through hole and then be threadedly connected to the third nut. The fourth fixing bolt is used to pass through the sixth through hole, one second adjustment hole and the eighth through hole and then be threadedly connected to the fourth nut.
6. The disassembling device for the stuffing box gland of the large gate valve according to claim 5, characterized in that: It further includes a top plate and a jack. Both ends of the top plate are respectively detachably fixedly connected to the first support arm and the second support arm. The bottom of the jack is used to tighten the top plate, and the movable end of the jack is used to tighten the top end of the valve stem. The extension of the jack can make the chuck pull out the packing gland.
7. The large gate valve packing gland disassembly device according to claim 6, characterized in that: The top plate includes a first plate member, a second plate member, a fifth fixing bolt, a fifth nut, a sixth fixing bolt, and a sixth nut. At both ends of the first plate member, a ninth through hole and a tenth through hole are respectively provided. At both ends of the second plate member, an eleventh through hole and a twelfth through hole are respectively provided. The fifth fixing bolt is used to pass through the ninth through hole, one of the first adjustment holes, and the eleventh through hole and then be threadedly connected to the fifth nut. The sixth fixing bolt is used to pass through the tenth through hole, one of the second adjustment holes, and the twelfth through hole and then be threadedly connected to the sixth nut.