Valve switch extension rod

Abstract

The utility model belongs to the technical field of low-temperature valves of air separation devices, and relates to a valve switch extension rod which comprises an extension rod body, a main rotating shaft is arranged on the extension rod body, a left rolling shaft and a right rolling shaft are arranged on the two sides of the main rotating shaft respectively, a hand wheel is arranged on one side of the extension rod body, a back plate is arranged on the other side of the extension rod body, and an execution claw is arranged on the back plate. A low-temperature valve hand wheel is arranged on one side of the execution claw, and spokes are arranged on the low-temperature valve hand wheel. The device is flexible in rotation and firm in grabbing, the extension rod penetrates through the firewall, the low-temperature valve hand wheel is fastened by the execution claw, the low-temperature valve is convenient to rotate, the device is safe and easy to operate, and manpower is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-temperature valves for air separation devices, and particularly relates to a valve switch extension rod. Background Art

[0002] In large-scale air separation units, the design of a rare gas krypton-xenon extraction system can improve the unit's operating economy by increasing the export of byproducts. Fire and explosion prevention are key safety controls in the extraction process of the depleted krypton-xenon product in air separation units. Firewalls are designed in key safety areas. Therefore, designing the opening and closing methods of on-site cryogenic valves to minimize operator time in hazardous areas is a key safety management priority.

[0003] In the existing technology, a handle is welded to one end of a metal tube of appropriate length, and three thin claws are welded to the other end to extend into the valve handwheel as a valve extension rod. This allows the valve to be operated remotely from outside the firewall, or the operator may venture into the dangerous area to open or close the valve. However, there are some problems in actual use:

[0004] 1. Inflexible operation. First, the diameter of the metal tube does not match the size of the firewall hole. When the extension handle is turned, the extension tube swings up and down and left and right in the hole. Second, there is friction between the three fine claws and the low-temperature valve handwheel. The external rotation force cannot act smoothly on the valve handwheel, causing it to slip easily.

[0005] 2. Inflexible operation. When the extension rod rotates, the metal parts that come into contact with the cryogenic valve handwheel are prone to sparks and static electricity due to friction and collision. In key areas with strict fire and explosion safety requirements, sparks and static electricity are dangerous sources.

[0006] Therefore, a valve switch extension rod is proposed to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide a valve switch extension rod with a valve switch function, which solves the problems of inflexible operation and inflexible operation of the prior art.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides a valve switch extension rod, including an extension rod, a main rotating shaft is provided on the extension rod, a left roller and a right roller are respectively provided on both sides of the main rotating shaft, a handwheel is provided on one side of the extension rod, a back plate is provided on the other side of the extension rod, an execution claw is provided on the back plate, a low-temperature valve handwheel is provided on one side of the execution claw, and spokes are provided on the low-temperature valve handwheel.

[0009] Preferably, the diameter of the main shaft matches the diameter of the metal sleeve of the firewall hole, and the distance between the left roller and the right roller matches the thickness of the firewall hole.

[0010] Preferably, the back plate is circular, and is provided with three groups of execution claws, each of which is a double-toothed execution claw.

[0011] Preferably, the back plate diameter corresponds to the diameter of the cryogenic valve handwheel, and the position of the actuator claw is set according to the position of the spokes.

[0012] Preferably, a rubber bushing is provided on the actuator claw, and the tooth pitch of the rubber bushing corresponds to the spoke width.

[0013] Preferably, the rubber gaskets are connected to each other and integrally mounted on the actuator claw.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] 1. The utility model has flexible rotation and firm grip. The extension rod passes through the firewall and the executive claw fastens the low-temperature valve handwheel, making it convenient to rotate the low-temperature valve. It is safe, easy to operate and saves manpower.

[0016] 2. The utility model has a valve switching function, which solves the problems of inflexible operation and inflexible operation of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a structural diagram of a valve switch extension rod;

[0019] In the above figure, 1. handwheel, 2. extension rod, 3. main shaft, 4. back plate, 5. actuator claw, 6. cryogenic valve handwheel, 7. left roller, 8. right roller, 9. spoke. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1, as Figure 1 As shown, a valve switch extension rod 2 includes an extension rod 2, which is provided with a main shaft 3. A left roller 7 and a right roller 8 are respectively provided on either side of the main shaft 3. A handwheel 1 is provided on one side of the extension rod 2, and a back plate 4 is provided on the other side of the extension rod 2. The back plate 4 serves as a connection base, providing support and positioning. An actuator claw 5 is provided on the back plate 4, and a cryogenic valve handwheel 6 is provided on one side of the actuator claw 5. The cryogenic valve handwheel 6 is connected to the valve body of the cryogenic valve and completes the specific valve opening and closing action by rotation. The cryogenic valve handwheel 6 is provided with spokes 9. The spokes 9 reinforce the cryogenic valve handwheel 6 and provide a gripping area for the actuator claw 5. The actuator claw 5 can correspondingly engage the spokes 9.

[0023] Handwheel 1 serves as the operating point. Manual rotation of handwheel 1 transmits rotational force to extension rod 2, which in turn drives the cryogenic valve handwheel 6 to open or close the valve. This simple, ergonomic design facilitates user application of force and allows operation outside hazardous areas, ensuring personnel safety. Extension rod 2 transmits the rotational force of handwheel 1 to actuator claw 5 on the other side of the firewall, enabling remote operation. This extended design effectively prevents personnel from entering hazardous areas, and its robust structure enhances operational stability and prevents shaking.

[0024] The following is a detailed description of the design of the above key components:

[0025] The diameter of the main rotating shaft 3 matches the diameter of the metal sleeve of the firewall hole, and the spacing between the left roller 7 and the right roller 8 matches the thickness of the firewall hole. The diameter of the main rotating shaft 3 needs to accurately measure the diameter of the metal sleeve pre-buried in the firewall hole, and accurately match the diameter of the main rotating shaft 3 to ensure that it passes through the hole smoothly and remains stable. It cannot be too small, otherwise it will shake, and it cannot be too large, otherwise it will not be able to pass through the hole. The spacing between the left roller 7 and the right roller 8 should match the thickness of the firewall hole to ensure that the extension rod 2 can pass through the hole smoothly and avoid the extension rod 2 getting stuck or shaking due to too small or too large spacing. The two bearings of the left roller 7 and the right roller 8 are respectively installed on the left and right holes of the firewall. In this way, the operator turns the handwheel 1 outside the firewall, and the main rotating shaft 3 rotates flexibly in the hole, which is flexible and labor-saving to operate.

[0026] The backplate 4 is circular and equipped with three sets of double-toothed actuator claws 5. The circular backplate 4 provides high overall stability and eases installation and operation. The use of three sets of double-toothed actuator claws 5 effectively distributes pressure and enhances grip, preventing deformation or slippage caused by excessive pressure on a single claw. The double-tooth design more precisely aligns with the spokes 9 of the cryogenic valve handwheel 6, enhancing grip security.

[0027] The diameter of the backplate 4 corresponds to the diameter of the cryogenic valve handwheel 6, and the position of the actuator 5 is set according to the position of the spokes 9. The actuator 5 is precisely positioned according to the position of the spokes 9, and the teeth on the actuator 5 are precisely aligned with the spokes 9 on the cryogenic valve handwheel 6, ensuring that the actuator 5 can effectively grasp the handwheel 1 and rotate it. The pitch of the rubber gasket's teeth corresponds to the width of the spokes 9. The pitch of the rubber gasket's teeth should correspond to the width of the spokes 9 on the cryogenic valve handwheel 6 to ensure that the rubber gasket can fully wrap around the spokes 9, increasing friction while preventing damage caused by overtightening.

[0028] The actuator claw 5 is equipped with rubber bushings, whose tooth pitch corresponds to the width of the spokes 9. These bushings are interconnected and integrally mounted on the actuator claw 5. Multiple interconnected and integrally mounted rubber bushings on the actuator claw 5 ensure the integrity of the bushings during the gripping process and further enhance gripping stability. The rubber material is selected to be low-temperature resistant, wear-resistant, and flame-retardant to avoid sparks and static electricity generated by friction.

[0029] Pass the extension rod 2 through the hole in the firewall so that the main shaft 3 fits the reserved metal sleeve. Install the rubber gasket as a whole on the actuator 5, and fit the back plate 4 tightly with the spokes 9 of the cryogenic valve handwheel 1. Then, according to the actual location on site, weld one end of the extension rod 2 to the center point of the back plate 4. The process personnel rotate the handwheel 1 outside the firewall, and drive the back plate 4 to rotate under the transmission of the main shaft 3. At the same time, there is a rubber gasket between the actuator 5 and the spokes 9. When the actuator 5 drives the spokes 9 of the cryogenic valve handwheel 6 to rotate, the rubber gasket plays a role in avoiding collision and friction. Rotate the extension rod 2, and the double-tooth actuator 5 drives the spokes 9 of the cryogenic valve handwheel 6 to rotate, realizing the opening and closing of the valve core.

[0030] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. 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 for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A valve switch extension rod, characterized in that: It includes an extension rod, a main rotating shaft is provided on the extension rod, a left roller and a right roller are respectively provided on both sides of the main rotating shaft, a handwheel is provided on one side of the extension rod, a back plate is provided on the other side of the extension rod, an execution claw is provided on the back plate, a low-temperature valve handwheel is provided on one side of the execution claw, and spokes are provided on the low-temperature valve handwheel.

2. A valve switch extension rod according to claim 1, characterized in that: The diameter of the main rotating shaft matches the diameter of the metal sleeve of the firewall hole, and the distance between the left roller and the right roller matches the thickness of the firewall hole.

3. The valve switch extension rod according to claim 1, characterized in that: The back plate is circular and is provided with three groups of execution claws, each of which is a double-toothed execution claw.

4. The valve switch extension rod according to claim 1, characterized in that: The back plate diameter corresponds to the low temperature valve hand wheel diameter, and the position of the actuator claw is set according to the spoke position.

5. The valve switch extension rod according to claim 4, characterized in that: The execution claw is provided with a rubber pad, and the tooth pitch of the rubber pad corresponds to the width of the spoke.

6. The valve switch extension rod according to claim 5, characterized in that: The rubber bushings are connected to each other and integrally mounted on the execution claw.

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