CN220932268U - Tool clamp - Google Patents

Abstract

The application provides a fixture for clamping at least two hollow insulators, which at least comprises a middle sealing plate and two end sealing plates, wherein the middle sealing plate is provided with a first plate surface and a second plate surface which are arranged in opposite directions, the middle sealing plate is provided with a first through hole, the first through hole penetrates through the first plate surface and the second plate surface and is used for communicating the two hollow insulators, one ends of the two hollow insulators are respectively and hermetically connected with the middle sealing plate through the first plate surface and the second plate surface, the other ends of the two hollow insulators are respectively and hermetically connected with the two end sealing plates, and the end sealing plates are provided with second through holes and are used for filling gas. Above-mentioned frock clamp can improve hollow insulator test efficiency, practices thrift test cost simultaneously.

Description

Tool clamp

Technical Field

The application relates to the technical field of power transformation, in particular to a tool clamp.

Background

When the finished product of the existing transformer substation hollow composite insulator is subjected to leakage detection, the tool clamps are generally arranged in two, the upper flange clamp and the lower flange clamp, leakage detection tests can be carried out on one product at a time, and the test efficiency is low.

Disclosure of utility model

In view of the above, the application provides a fixture, which can improve the test efficiency and save the test cost.

In order to solve the problems, the application provides a fixture for clamping at least two hollow insulators, which comprises at least one middle sealing plate and two end sealing plates, wherein the middle sealing plate is provided with a first plate surface and a second plate surface which are arranged in a back-to-back manner, the middle sealing plate is provided with a first through hole, the first through hole penetrates through the first plate surface and the second plate surface and is used for communicating the two hollow insulators, one ends of the two hollow insulators are respectively in sealing connection with the middle sealing plate through the first plate surface and the second plate surface, the other ends of the two hollow insulators are respectively in sealing connection with the two end sealing plates, and the end sealing plates are provided with second through holes and are used for filling gas.

According to some embodiments of the application, the first plate surface and the second plate surface are respectively provided with a first groove and a second groove, one ends of the two hollow insulators are respectively provided with a first sealing surface, a first sealing ring is arranged in the first groove, the first sealing ring is embedded in a cavity between the first groove and the first sealing surface of one hollow insulator, a second sealing ring is arranged in the second groove, and the second sealing ring is embedded in a cavity between the second groove and the first sealing surface of the other hollow insulator.

According to some embodiments of the application, the radial depth of the first groove and/or the second groove is at least 2.5mm.

According to some embodiments of the application, the middle sealing plate is further provided with a plurality of first mounting holes, and the plurality of first mounting holes are circumferentially and uniformly distributed on the peripheral edge of the middle sealing plate.

According to some embodiments of the application, one end of the hollow insulator is provided with a plurality of second mounting holes, and the second mounting holes are correspondingly arranged with the first mounting holes so as to penetrate through fasteners to fixedly connect the middle sealing plate and the hollow insulator.

According to some embodiments of the application, the end sealing plate is provided with a third plate surface and a fourth plate surface which are arranged in a back-to-back mode, the third plate surface is provided with a third groove, the other end of the hollow insulator is provided with a second sealing surface, a third sealing ring is arranged in the third groove, and the third sealing ring is embedded in a cavity between the third groove and the second sealing surface.

According to some embodiments of the application, the end sealing plate is further provided with a plurality of third mounting holes, and the third mounting holes are circumferentially and uniformly distributed on the peripheral edge of the end sealing plate.

According to some embodiments of the application, the other end of the hollow insulator is provided with a plurality of fourth mounting holes, and the fourth mounting holes are correspondingly arranged with the third mounting holes so as to penetrate through fasteners to fixedly connect the end sealing plate and the hollow insulator.

According to some embodiments of the application, an inflation valve is arranged in the second through hole, the inflation valve comprises a connecting part, a supporting part and an inflation part which are coaxially arranged in sequence, a first step surface is formed between the connecting part and the supporting part, and the first step surface is in sealing connection with the end sealing plate.

According to some embodiments of the application, the second through hole is a stepped hole, the stepped hole comprises a first connecting hole and a second connecting hole which are coaxially arranged, the connecting part is connected with the first connecting hole through threads, so that the inflation valve is connected with the stepped hole in a matched mode, and the thread length of the connecting part is slightly larger than that of the first connecting hole.

The beneficial effects are that: the tool clamp comprises at least one middle sealing plate and two end sealing plates, the middle sealing plates are sequentially and hermetically connected with a plurality of hollow insulators, and the two end sealing plates are respectively and hermetically connected with the other ends of the two outermost hollow insulators, so that leakage detection tests can be simultaneously carried out on the plurality of hollow insulators at one time, the test efficiency of products is improved, and the test cost is reduced.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

Fig. 1 is a schematic structural diagram of a fixture for clamping two hollow insulators according to an embodiment of the present application;

FIG. 2 is a schematic view of the intermediate seal plate of FIG. 1;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a schematic view of the first flange of FIG. 1;

FIG. 5 is an enlarged schematic view at B in FIG. 4;

FIG. 6 is a schematic view of the end closure plate of FIG. 1;

FIG. 7 is an enlarged schematic view at C in FIG. 6;

FIG. 8 is a schematic view of the structure of an inflation valve according to one embodiment of the present application;

Fig. 9 is a schematic view of an end closure plate according to another embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1, the application provides a fixture for clamping two hollow insulators 100, the fixture comprises a middle sealing plate 200 and two end sealing plates 300, one end of each hollow insulator 100 is connected with the middle sealing plate 200, the two hollow insulators 100 are respectively positioned at two sides of the middle sealing plate 200, and the two end sealing plates 300 are respectively fixedly connected with the other ends of the two hollow insulators 100, so that the two hollow insulators 100 are clamped by the fixture at the same time, and leak detection tests can be carried out on the two hollow insulators 100 at the same time.

The hollow insulator 100 includes an insulating tube, an umbrella skirt coated on the periphery of the insulating tube, and flanges disposed at two ends of the insulating tube, where the insulating tube is a composite hollow insulating tube made of glass fiber impregnated epoxy resin, and the umbrella skirt may be made of high-temperature vulcanized silicone rubber, liquid silicone rubber, room temperature vulcanized silicone rubber, or other materials, which is not limited herein. In the present application, the first flange 110 and the second flange 120 are respectively sleeved at two ends of the insulating tube of the hollow insulator 100, one end of the hollow insulator 100 is connected with the middle sealing plate 200 through the first flange 110, and the other end is connected with the end sealing plate 300 through the second flange 120. Wherein the first flange 110 and the second flange 120 are both made of a metal material.

Referring to fig. 1-5, the middle sealing plate 200 is a metal plate, the middle sealing plate 200 is provided with a first plate surface 210 and a second plate surface 220 which are arranged opposite to each other, the first plate surface 210 and the second plate surface 220 are parallel to each other, the middle sealing plate 200 is provided with a first through hole 230, the first through hole 230 is located at the center of the middle sealing plate 200 and penetrates through the first plate surface 210 and the second plate surface 220, namely, the axis of the first through hole 230 is perpendicular to the first plate surface 210 and is used for communicating the inner cavities of two hollow insulators 100, and when the air is filled into the hollow insulators 100, the air is filled into the two hollow insulators 100, so that the leak detection test can be performed on the two hollow insulators 100 at the same time.

The first plate 210 is provided with a first groove 211, the first groove 211 is an annular groove, and the first groove 211 and the first through hole 230 are coaxially arranged. Meanwhile, the end surface of the first flange 110 of the hollow insulator 100 far away from the insulating tube (namely, the end surface of the flange plate 111) is provided with a first sealing surface 112, the first sealing surface 112 is a circular groove, and the first sealing surface 112 and the flange plate 111 of the first flange 110 are coaxially arranged, namely, a step is formed between the first sealing surface 112 and the end surface of the flange plate 111. When one of the hollow insulators 100 is mounted with the middle sealing plate 200 in a sealing manner, a first sealing ring is arranged in the first groove 211, after the first plate surface 210 is mounted with the first flange 110 in a butt joint manner, the first sealing ring is embedded in a cavity formed by the first sealing surface 112 of one of the hollow insulators 100 and the first groove 211, and fills a gap between the first plate surface 210 and the end surface of the first flange 110, so that one of the hollow insulators 100 is in sealing connection with the middle sealing plate 200, and impurities such as water vapor in the external environment are prevented from entering the hollow insulator 100. The length of the first groove 211 along the radial direction is defined as the radial depth of the first groove 211, and the radial depth of the first groove 211 is at least 2.5mm, so that the compression amount of the first sealing ring can be met to the greatest extent, and the sealing effect of the first sealing ring can be fully exerted. Of course, the radial depth of the first groove 211 does not exceed the diameter of the first seal ring at maximum, otherwise the first seal ring cannot be compressed and cannot function as a seal.

Similarly, the second plate 220 is provided with a second groove 221, the second groove 221 is an annular groove, and the second groove 221 is coaxially disposed with the first through hole 230. At the same time, the end face of the first flange 110 of the other hollow insulator 100 facing away from the insulating tube is also provided with a first sealing surface (not shown). When another hollow insulator 100 is mounted with the middle sealing plate 200 in a sealing manner, a second sealing ring is arranged in the second groove 221, after the second plate surface 220 is mounted in butt joint with the first flange 110, the second sealing ring is embedded in a cavity formed by the first sealing surface of the another hollow insulator 100 and the second groove 221, and fills a gap between the second plate surface 220 and the end surface of the first flange 110, so that the another hollow insulator 100 is connected with the middle sealing plate 200 in a sealing manner, and impurities such as water vapor in the external environment are prevented from entering the hollow insulator 100. The length of the second groove 221 along the radial direction is defined as the radial depth of the second groove 221, where the radial depth of the second groove 221 is at least 2.5mm, and the maximum diameter of the second groove is not more than the diameter of the second seal ring, and is specifically consistent with the first groove 211, which is not described herein.

Further, the middle sealing plate 200 is further provided with a plurality of first mounting holes 240, and the plurality of first mounting holes 240 are circumferentially and uniformly distributed at the peripheral edge of the middle sealing plate 200. The first flange 110 is provided with a plurality of second mounting holes 113, and the second mounting holes 113 and the first mounting holes 240 are correspondingly arranged to penetrate through fasteners to fixedly connect the middle sealing plate 200 and the hollow insulator 100.

Referring to fig. 1, 6 and 7, the end sealing plate 300 is a metal plate, the end sealing plate 300 is provided with a third plate surface 310 and a fourth plate surface 320 which are arranged opposite to each other, the third plate surface 310 and the fourth plate surface 320 are parallel to each other, the end sealing plate 300 is provided with a second through hole 330, the second through hole 330 is located at the center of the end sealing plate 300 and penetrates through the third plate surface 310 and the fourth plate surface 320, namely, the axis of the second through hole 330 is perpendicular to the third plate surface 310, and an inflation valve 400 shown in fig. 8 is arranged in the second through hole 330 and is used for filling gas. Wherein the second through hole 330 is a threaded hole for installation of the inflation valve 400.

The third plate surface 310 is provided with a third groove 311, the third groove 311 is an annular groove, and the third groove 311 and the second through hole 330 are coaxially arranged. Meanwhile, the end surface of the second flange 120 of the hollow insulator 100 far away from the insulating tube (i.e., the flange end surface) is provided with a second sealing surface (not shown), which is similar to the first sealing surface 112, and detailed description thereof is omitted. When the hollow insulator 100 is mounted with the end sealing plate 300 in a sealing manner, a third sealing ring is arranged in the third groove 311, after the third plate surface 310 is mounted with the second flange 120 in a butt joint manner, the third sealing ring is embedded in a cavity formed by the second sealing surface and the third groove 311, and fills a gap between the third plate surface 310 and the end surface of the second flange 120, so that the hollow insulator 100 is connected with the end sealing plate 300 in a sealing manner, and impurities such as water vapor in the external environment are prevented from entering the hollow insulator 100. The length of the third groove 311 along the radial direction is defined as the radial depth of the third groove 311, where the radial depth of the third groove 311 is at least 2.5mm, and the maximum diameter of the third groove is not more than the diameter of the third seal ring, and is in line with the first groove 211, which will not be described again.

In an application scenario, the third groove may also be disposed on the fourth board 320, which is consistent with the foregoing, and will not be described herein.

Further, the end sealing plate 300 is further provided with a plurality of third mounting holes 340, and the plurality of third mounting holes 340 are circumferentially and uniformly distributed at the peripheral edge of the end sealing plate 300. The second flange 120 is provided with a plurality of fourth mounting holes 121, and the fourth mounting holes 121 and the third mounting holes 340 are correspondingly arranged to penetrate through fasteners to fixedly connect the end sealing plate 300 and the hollow insulator 100.

In this embodiment, the fixture includes a middle sealing plate 200 and two end sealing plates 300, where two plate surfaces of the middle sealing plate 200 are respectively connected with one ends of two hollow insulators 100 in a sealing manner, and two end sealing plates 300 are respectively connected with the other ends of two hollow insulators 100 in a sealing manner. When the product leak detection test is performed, the air charging valve 400 of the end sealing plate 300 is connected with an external air charging device, the air charging device fills a preset amount of air into the two hollow insulators 100 according to the requirement, the air can be filled in the two hollow insulators 100, and then the leak detection test can be performed on the two hollow insulators 100 at one time, so that the product test efficiency is improved, the test cost is reduced, and the air charging efficiency can be improved by arranging the two air charging valves 400 to charge air at the same time. The gas filled in the hollow insulator 100 may be sulfur hexafluoride gas or helium gas, or other gases, which is not limited herein.

Specifically, referring to fig. 8, the inflation valve 400 includes a connection portion 410, a support portion 420, and an inflation portion 430 coaxially disposed in this order, the connection portion 410 and the inflation portion 430 each having a smaller diameter than the support portion 420, such that a first stepped surface 401 is formed between the connection portion 410 and the support portion 420, and the inflation portion 430 is adapted to be connected to an external inflation device. The second through hole 330 is provided with an internal thread, and the connection part 410 of the air charging valve 400 is provided with an external thread, and the connection part 410 is fastened by threads after being inserted into the second through hole 330. After the connecting portion 410 is inserted into the second through hole 330 and screwed, the first step surface 401 abuts against the fourth plate surface 320, at this time, a fourth groove (not shown) is disposed on the fourth plate surface 320, the fourth groove is an annular groove, the fourth groove and the second through hole 330 are coaxially disposed, when the air charging valve 400 and the end sealing plate 300 are mounted, a fourth sealing ring is disposed in the fourth groove, the fourth sealing ring is embedded in a cavity formed by the first step surface 401 and the fourth groove, and fills a gap between the first step surface 401 and the fourth plate surface 320, so that the air charging valve 400 and the end sealing plate 300 are in sealing connection, and impurities such as water vapor in an external environment are prevented from entering the hollow insulator 100. Of course, the fourth groove may be provided on the first step surface 401, which is not limited herein. Further, after the air charging valve 400 is screwed into the second through hole 330, a seal is formed between the air charging valve 400 and the end sealing plate 300, so that a sealing effect is ensured when the hollow insulator 100 is inflated.

In other embodiments, the tooling fixture may further include one end sealing plate 300 and another end sealing plate (not shown), which is similar to the end sealing plate 300 in structure, except that the center of the end sealing plate is not provided with a second through hole, and then the two hollow insulators 100 are inflated through only one inflation valve 400.

Or in the two end sealing plates 300 of the fixture, the second through hole 330 of one end sealing plate 300 is internally provided with the inflation valve 400, the second through hole 330 of the other end sealing plate 300 is not internally provided with the inflation valve, and the two hollow insulators 100 are directly plugged by the plugging device without limitation, and are inflated only through one inflation valve 400. The plugging device may be a rubber plug, a welding piece, etc., and is not limited herein.

In another embodiment, the fixture may further include two middle sealing plates 200 and two end sealing plates 300, where the two middle sealing plates 200 may be sequentially connected with the three hollow insulators 100 in a sealing manner, and the leak detection test may be performed on the three hollow insulators 100 at a time according to the same method as described above. Likewise, the number of intermediate seal plates 200 may be three, four, or other numbers as the test site permits, without limitation. Thus, the leak detection test can be simultaneously carried out on a plurality of hollow insulators 100 at one time, the test efficiency of products can be improved to the greatest extent, and the test cost is reduced.

Referring to fig. 8 and 9, in an application scenario, the second through hole 530 in the middle of the end sealing plate 500 is a stepped hole 530, and the stepped hole 530 includes a first connection hole 531 and a second connection hole 532 coaxially disposed, where the diameter of the first connection hole 531 is larger than that of the second connection hole 532, so that a second stepped surface 533 is formed between the first connection hole 531 and the second connection hole 532. Meanwhile, the first connection hole 531 penetrates the fourth plate surface 520, the second connection hole 532 penetrates the third plate surface 510, and the stepped hole 530 is used for installing the air charging valve 400. Wherein the first connection hole 531 is a screw hole, and the air charge valve 400 is installed in the first connection hole 531.

The first connection hole 531 is a threaded hole, the first connection hole 531 is provided with an internal thread, and the connection portion 410 of the inflation valve 400 is inserted into the first connection hole 531 and then is fastened and connected by the thread. The external thread length of the connecting portion 410 is slightly greater than the internal thread length of the first connecting hole 531, when the connecting portion 410 is inserted into the first connecting hole 531 and screwed, the end surface of the connecting portion 410 can abut against the second step surface 533, and meanwhile, a fifth sealing ring (not shown) is further sleeved on the end surface of the connecting portion 410, so that the fifth sealing ring is filled between the connecting portion 410 and the second step surface 533, and the sealing connection between the air charging valve 400 and the end sealing plate 500 is ensured.

In an application scenario, the screw length of the connecting portion 410 is 12mm, the screw length of the first connecting hole 531 is 10mm, when the connecting portion 410 is inserted into the stepped hole 530 and screwed, it is ensured that the end face of the connecting portion 410 of the inflation valve 400 can abut against the second stepped surface 533, and meanwhile, the fifth sealing ring on the end face of the connecting portion 410 can be extruded through fastening the inflation valve 400, so that the compression amount of the fifth sealing ring can be released to the greatest extent, and the sealing effect of the fifth sealing ring can be fully exerted.

In other embodiments, the length of the external thread of the connecting portion 410 may be slightly smaller than the length of the internal thread of the first connecting hole 531, and a fifth groove (not shown) is disposed on the fourth plate surface 520 or the first step surface 401, and a sixth sealing ring is disposed in the fifth groove, so that the inflation valve 400 is in sealing connection with the end sealing plate 500, which is similar to the above, and will not be repeated.

Alternatively, in another embodiment, the length of the external thread of the connecting portion 410 may be equal to the length of the internal thread of the first connecting hole 531, and at this time, a first seal is provided between the end surface of the connecting portion 410 and the second step surface 533, and a second seal is provided between the first step surface 401 and the fourth plate surface 520, which is similar to the above description, and is not repeated. In this way, two seals are formed between the inflation valve 400 and the end seal plate 500, and the sealing effect of the hollow insulator 100 during inflation is further ensured.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. The utility model provides a frock clamp for clamping at least two hollow insulators, its characterized in that, frock clamp includes at least one middle shrouding and two tip shrouding, the middle shrouding is equipped with the first face and the second face that set up in opposite directions, the middle shrouding is equipped with first through-hole, first through-hole link up first face with the second face is used for communicating two hollow insulators, two hollow insulators's one end is passed through respectively first face with the second face with middle shrouding sealing connection, the other end respectively with two tip shrouding sealing connection, the tip shrouding is equipped with the second through-hole for filling gas.

2. The fixture of claim 1, wherein the first plate surface and the second plate surface are respectively provided with a first groove and a second groove, the one ends of the two hollow insulators are respectively provided with a first sealing surface, a first sealing ring is arranged in the first groove, the first sealing ring is embedded in a cavity between the first groove and the first sealing surface of one hollow insulator, a second sealing ring is arranged in the second groove, and the second sealing ring is embedded in a cavity between the second groove and the first sealing surface of the other hollow insulator.

3. A tool holder according to claim 2, wherein the radial depth of the first groove and/or the second groove is at least 2.5mm.

4. The tool clamp according to claim 1, wherein the middle sealing plate is further provided with a plurality of first mounting holes, and the plurality of first mounting holes are circumferentially and uniformly distributed on the peripheral edge of the middle sealing plate.

5. The tool clamp according to claim 4, wherein the hollow insulator is provided with a plurality of second mounting holes at one end thereof, and the plurality of second mounting holes are provided corresponding to the plurality of first mounting holes so as to fixedly connect the intermediate sealing plate and the hollow insulator by penetrating fasteners.

6. The tool clamp according to claim 1, wherein the end sealing plate is provided with a third plate surface and a fourth plate surface which are arranged in a back-to-back mode, the third plate surface is provided with a third groove, the other end of the hollow insulator is provided with a second sealing surface, a third sealing ring is arranged in the third groove, and the third sealing ring is embedded in a cavity between the third groove and the second sealing surface.

7. The tool clamp according to claim 1, wherein the end sealing plate is further provided with a plurality of third mounting holes, and the plurality of third mounting holes are circumferentially and uniformly distributed on the peripheral edge of the end sealing plate.

8. The tool clamp according to claim 7, wherein the other end of the hollow insulator is provided with a plurality of fourth mounting holes, and the fourth mounting holes are arranged corresponding to the third mounting holes so as to fixedly connect the end sealing plate and the hollow insulator through fasteners.

9. The tool clamp according to claim 1, wherein an inflation valve is arranged in the second through hole, the inflation valve comprises a connecting portion, a supporting portion and an inflation portion which are sequentially and coaxially arranged, a first step surface is formed between the connecting portion and the supporting portion, and the first step surface is in sealing connection with the end sealing plate.

10. The tool clamp according to claim 9, wherein the second through hole is a stepped hole, the stepped hole comprises a first connecting hole and a second connecting hole which are coaxially arranged, the connecting portion is connected with the first connecting hole through threads, the inflation valve is connected with the stepped hole in a matched mode, and the thread length of the connecting portion is slightly larger than that of the first connecting hole.