Shut-off valve core pick-and-place tool

Abstract

The utility model discloses a stop valve core pick-and-place tool, including fixed plate, spigot, transmission rod, locking nut, be equipped with central hole on the fixed plate, and spigot is equipped with connecting section, screw thread section, and screw thread section passes through central hole and is connected locking nut with screw thread, and the lower end fixed connection of connecting section has a plurality of clamping teeth, and all clamping teeth enclose the tapered channel, and transmission rod includes tapered section, movable section, outer thread section and clamping section, and the upper end of tapered section is located inside the lower end of spigot, and the lower end of tapered section extends into the tapered channel, and clamping section is located outside spigot. The utility model discloses simple structure, and convenient installation and operation, do not directly contact the valve core, reduce the possible contamination in the working process of staff, and the clamping tooth of spigot lower end forms the function similar to expansion bolt, can effectively and uniformly cooperate with the valve core inner hole after transmission rod stress, reduces unnecessary collision of valve core outside and valve cavity, and compared with the original dismounting mode, also protects the sealing surface integrity of valve core valve seat.

Description

Technical Field

[0001] This utility model belongs to the field of maintenance tool technology, specifically relating to a valve core removal and placement tool for shut-off valves. Background Technology

[0002] In standard gate valve designs, the clearance between the valve core and the valve cavity is relatively large, allowing for easy removal by hand during disassembly. However, special models of pneumatic gate valves (such as model 728V-10-3) have a very small clearance between the valve core and the valve cavity, with a greater depth and a unique structure. In nuclear power applications, where the working medium is contaminated, workers wearing radiation-protective latex gloves cannot remove the valve core directly by hand. Using simple tools like screwdrivers can easily damage the valve core structure, leading to leaks. Current technology involves machining a bar stock with a clearance slightly smaller than the valve core's inner hole according to drawings, then gently tapping the bar stock into the valve core's groove with a rubber mallet to remove the valve core from the valve cavity. The disadvantage is that this tapping process may cause unnecessary damage to the valve core and valve seat sealing surfaces. Utility Model Content

[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a valve core picking and placing tool for a stop valve includes a fixed plate, a tube, a transmission rod, and a locking nut. The fixed plate has a central hole. The tube has a connecting section and a threaded section from bottom to top. The threaded section passes through the central hole and is threadedly connected to the locking nut. The fixed plate is clamped between the connecting section and the locking nut. The lower end of the connecting section is fixedly connected to several circumferentially arranged clamping teeth. All the clamping teeth form a conical channel with a diameter that gradually increases from bottom to top. The conical channel connects to the inside of the tube. The inner wall of the upper end of the tube has an internal thread. The transmission rod includes a conical section, a movable section, an external threaded section, and a clamping section connected from bottom to top. The diameter of the conical section gradually increases from bottom to top. The upper end of the conical section is located inside the lower end of the tube, and the lower end of the conical section extends into the conical channel. The external threaded section has an external thread that mates with the internal thread of the tube. The clamping section is located outside the tube, and several clamping surfaces are provided around the clamping section.

[0004] As a preferred embodiment of the above technical solution, the two sides of the central hole are respectively provided with outer limiting planes, and the two sides of the threaded section are respectively provided with inner limiting planes, and the inner limiting planes are respectively attached to the corresponding outer limiting planes.

[0005] As a preferred embodiment of the above technical solution, the fixing plate is provided with a plurality of fixing holes.

[0006] As a preferred embodiment of the above technical solution, an annular limiting platform is provided between the conical channel and the inside of the insertion tube, and the diameter of the movable section is larger than the inner diameter of the annular limiting platform.

[0007] As a preferred embodiment of the above technical solution, the lower outer side of the clamping teeth is provided with several anti-slip textures.

[0008] The beneficial effects of this utility model are: 1. Simple structure, easy to install and operate; 2. It avoids direct contact with the valve core, reducing the possibility of contamination for workers during operation; 3. The clamping teeth at the lower end of the insertion tube function similarly to an expansion bolt, which can effectively and evenly cooperate with the inner hole of the valve core after the transmission rod is subjected to force, reducing unnecessary collisions between the outer side of the valve core and the inside of the valve cavity. Compared with the original disassembly and assembly method, it also protects the sealing surface of the valve core and valve seat. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model. Detailed Implementation

[0010] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0011] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0012] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0013] stop valve core removal and placement tools, such as Figure 1 and 2As shown, the device includes a fixing plate 1, an insertion tube 2, a transmission rod 3, and a locking nut 4. The fixing plate 1 has a central hole 5. The insertion tube 2 has a connecting section 6 and a threaded section 7 arranged sequentially from bottom to top. The threaded section 7 passes through the central hole 5 and is threadedly connected to the locking nut 4. The fixing plate 1 is sandwiched between the connecting section 6 and the locking nut 4. The lower end of the connecting section 6 is fixedly connected to several circumferentially arranged clamping teeth 8. All the clamping teeth 8 form a tapered channel 9 with a diameter that gradually increases from bottom to top. The tapered channel 9 connects to the interior of the insertion tube 2. The upper end of the insertion tube 2... The inner wall of the transmission rod 3 is provided with an internal thread 10. The transmission rod 3 includes a tapered section 11, a movable section 12, an external thread section 20, and a clamping section 13 connected sequentially from bottom to top. The diameter of the tapered section 11 gradually increases from bottom to top. The upper end of the tapered section 11 is located inside the lower end of the insertion tube 2, and the lower end of the tapered section 11 extends into the tapered channel 9. The external thread section 20 is provided with an external thread that engages with the internal thread 10 of the insertion tube 2. The clamping section 13 is located outside the insertion tube 2, and several clamping surfaces 14 are provided around the clamping section 13. The clamping section 13 is clamped with a tool to drive the transmission rod 3 to rotate. Before use, the fixing plate 1, insertion tube 2, transmission rod 3, and locking nut 4 are assembled. During use, the fixing plate 1 is placed on the flange of the stop valve, and the lower end of the insertion tube 2 is inserted into the inner hole of the stop valve core. Using a square-headed wrench, slowly rotate the transmission rod 3, causing it to spiral downwards. The lower end of the conical section 11 gradually extends into the conical channel 9, gradually opening the clamping teeth 8. The outer side of the clamping teeth 8 engages with the inner hole of the stop valve core, thus gripping the valve core using an internal support method. Move the fixing plate 1 to remove the valve core from the stop valve seat. Rotate the transmission rod 3 in the opposite direction, causing the conical section 11 to rise. The clamping teeth 8 return to their original position under the action of elastic restoring force, releasing the valve core.

[0014] Furthermore, outer limiting planes 15 are provided on both sides of the central hole 5, and inner limiting planes 16 are provided on both sides of the threaded section 7. The inner limiting planes 16 are respectively fitted with the corresponding outer limiting planes 15. In this way, the insertion tube 2 cannot rotate relative to the fixed plate 1 within the central hole 5.

[0015] Furthermore, the fixing plate 1 is provided with a plurality of fixing holes 17. The fixing holes 17 correspond to the flange holes on the flange of the gate valve. By using the bolts originally in the flange holes to pass through the fixing holes 17, the fixing plate 1 can be fixed to the flange.

[0016] Furthermore, an annular limiting platform 18 is provided between the conical channel 9 and the interior of the insertion tube 2, and the diameter of the movable section 12 is larger than the inner diameter of the annular limiting platform 18. The annular limiting platform 18 restricts the downward stroke of the transmission rod 3 to prevent the clamping teeth 8 from being excessively stretched open by the conical section 11.

[0017] Furthermore, the lower outer side of the clamping teeth 8 is provided with several anti-slip patterns. The anti-slip patterns improve the friction of the clamping teeth 8.

[0018] It is worth mentioning that the technical features such as the shut-off valve involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0019] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A valve core picking and placing tool for a shut-off valve, characterized in that, The device includes a fixed plate, a tube, a transmission rod, and a locking nut. The fixed plate has a central hole. The tube has a connecting section and a threaded section from bottom to top. The threaded section passes through the central hole and is threadedly connected to the locking nut. The fixed plate is sandwiched between the connecting section and the locking nut. The lower end of the connecting section is fixedly connected to several circumferentially arranged clamping teeth. All the clamping teeth form a tapered channel with a diameter that gradually increases from bottom to top. The tapered channel connects to the inside of the tube. The inner wall of the upper end of the tube has an internal thread. The transmission rod includes a tapered section, a movable section, an external threaded section, and a clamping section connected from bottom to top. The diameter of the tapered section gradually increases from bottom to top. The upper end of the tapered section is located inside the lower end of the tube, and the lower end of the tapered section extends into the tapered channel. The external threaded section has an external thread that mates with the internal thread of the tube. The clamping section is located outside the tube, and several clamping surfaces are provided around the clamping section.

2. The valve core picking and placing tool for a shut-off valve as described in claim 1, characterized in that, The center hole has an outer limiting plane on each side, and the threaded section has an inner limiting plane on each side, with the inner limiting planes respectively fitting into the corresponding outer limiting planes.

3. The valve core picking and placing tool for a shut-off valve as described in claim 2, characterized in that, The fixing plate is provided with several fixing holes.

4. The valve core picking and placing tool for a shut-off valve as described in claim 1, characterized in that, An annular limiting platform is provided between the conical channel and the inside of the insertion tube, and the diameter of the movable section is larger than the inner diameter of the annular limiting platform.

5. The valve core picking and placing tool for a shut-off valve as described in claim 1, characterized in that, The lower outer side of the clamping teeth is provided with several anti-slip textures.

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