Connecting mechanism and leaking stoppage device for combined electric appliance expansion joint

Abstract

The utility model relates to the technical field of substation safety, in particular to a connecting mechanism and a leakage stoppage device for a combined electric appliance expansion joint, which comprise a shell plate, a movable assembly, a main body assembly and a sealing assembly, the movable assembly comprises a pushing piece and a rotating piece, the main body assembly comprises a shell body, an expansion joint and a threading pipe, and the sealing assembly comprises a fixed piece and a pressing piece. By arranging the shell plate, the pushing part and the rotating part, the primary connecting and fixing effect of the shell plate is achieved, the problem that follow-up welding and sealing work is interfered if the position of the sealing cover is not primarily connected and fixed is solved, by arranging the shell body, the fixing part and the pressing part, the sealing effect of the leaking stoppage device on a leaking part is achieved, and the sealing effect of the leaking stoppage device on the leaking part is improved. The problem that large-range power failure of a transformer substation is caused if leakage is not stopped in time when the joint of the totally-enclosed combined electric appliance leaks is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substation safety, in particular to a connection mechanism and a leak-proof device for combined electrical expansion joints. Background Art

[0002] The characteristics of the SF6 fully enclosed combined electrical appliances used in 220KV substations are: all electrical equipment is encapsulated in a grounded aluminum alloy pressure-resistant casing filled with SF6 insulating gas at a certain pressure, and the insulation distance of all high-voltage electrical equipment is greatly reduced. Therefore, the equipment occupies a small area and installation space, and its appearance is neat and beautiful.

[0003] During use, the insulating gas SF6 in the equipment has very high requirements on the sealing of the shell. When there is a slight leak in the pressure-resistant shell, such as leakage in the expansion joint, shell, connecting flange seal, etc., the fault is usually solved by replacing the seal, shell or expansion joint, but it will cause large-scale power outages and the losses will be huge. When using a leak-proof device, if the position of the sealing cover is not initially connected and fixed, it will interfere with the subsequent welding and sealing work. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the problems existing in the prior art, the present utility model is proposed.

[0006] Therefore, the technical problem to be solved by the utility model is: if the position of the sealing cover is not preliminarily connected and fixed, it will cause interference to the subsequent welding and sealing work.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a connecting mechanism, comprising:

[0008] Shell plating; and,

[0009] The movable component is movably arranged on one side of the shell plate, and comprises a pushing member and a rotating member. The pushing member is arranged on one side of the shell plate, and the rotating member is connected to the pushing member.

[0010] As a preferred solution of the connecting mechanism described in the utility model, the shell plate includes a No. 1 accommodating groove, a No. 2 accommodating groove and a snap-in groove, the No. 1 accommodating groove is arranged on one side of the No. 2 accommodating groove and is arranged inside the shell plate, and the snap-in groove is away from the No. 1 accommodating groove and the No. 2 accommodating groove and is arranged inside the shell plate.

[0011] As a preferred solution of the connecting mechanism described in the utility model, the pushing member includes a clamping claw, a gear rod and a pressing spring, the gear rod is arranged on one side of the No. 1 accommodating groove and is connected to the clamping claw, and the pressing spring is arranged on the rod body of the gear rod.

[0012] As a preferred solution of the connecting mechanism described in the utility model, wherein: the rotating part includes a gear, an arcuate rack, a baffle and a hook block, one side of the gear is connected to the gear rod, the first side of the arcuate rack is connected to the gear, the baffle is connected to the second side of the arcuate rack, and the hook block is away from the baffle and connected to one end of the arcuate rack.

[0013] As a preferred solution of the connecting mechanism of the utility model, wherein: a first rack is provided at one end of the rack rod, and the first rack is meshed with one side of the gear; a second rack is provided at one end of the arc-shaped rack, and the second rack is meshed with one side of the gear.

[0014] The beneficial effects of the connection mechanism of the utility model are as follows: by setting the shell plate, the pushing member and the rotating member, the effect of the initial connection and fixing effect of the shell plate is achieved, and the problem that if the position of the sealing cover is not initially connected and fixed, it will interfere with the subsequent welding and sealing work.

[0015] In actual use, when leakage occurs at the connection of fully enclosed combination electrical appliances, if the leakage is not stopped in time, it will cause a large-scale power outage in the substation.

[0016] In order to solve the above technical problems, the utility model also provides the following technical solutions: a plugging device for a combined electrical expansion joint, comprising a main body component, the main body component is arranged on one side of the shell plate, and comprises a shell body, an expansion joint, and a threading tube, the shell body and the shell plate are made in one piece, the expansion joint and the threading tube are arranged inside the shell body, and the threading tube is connected to both ends of the expansion joint; and,

[0017] The sealing component is arranged at one side of the main body component, and comprises a fixing part and a pressing part, and the fixing part is arranged at one side of the pressing part.

[0018] As a preferred solution of the leak-proof device for combined electrical expansion joints of the utility model, the fixing member comprises a bolt and a nut, the bolt is connected to one side of the shell body, and the nut is movably connected to the bolt.

[0019] As a preferred solution of the leak-proof device for combined electrical expansion joints of the utility model, the pressing part includes a cover plate, a sealing ring and a triangular groove, the cover plate is arranged on one side of the shell body and fits with the shell body through the fixing part, the triangular groove is opened on one side of the shell plate, the sealing ring is placed inside the triangular groove and fits with one side of the cover plate.

[0020] As a preferred solution of the leak-proof device for combined electrical expansion joints of the utility model, the cover plate includes through holes, a plurality of the through holes penetrate through the plate body of the cover plate, and one end of the bolt passes through the through hole and is connected to the nut.

[0021] As a preferred solution of the leak-proof device for combined electrical expansion joints of the utility model, the sealing ring includes an oblique cut, and the sealing ring is disconnected from the oblique cut.

[0022] The beneficial effects of the leak-proof device for combined electrical expansion joints of the utility model are as follows: by arranging the shell body, the fixing parts and the pressing parts, the leak-proof device can achieve the sealing effect on the leaking part, thus solving the problem that when a leak occurs at the connection of the fully enclosed combined electrical appliance, if the leak is not promptly plugged, it will cause a large-scale power outage in the substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity. Among them:

[0024] Figure 1 This is the overall appearance diagram of the utility model.

[0025] Figure 2 It is a cross-sectional schematic diagram of the connection mechanism of the utility model.

[0026] Figure 3 It is a structural schematic diagram of the main component of the utility model.

[0027] Figure 4 It is a structural schematic diagram of the sealing component of the utility model. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figure 1-2 , which is the first embodiment of the utility model, provides a connection mechanism, including a shell plate 100 and a movable component 200, which solves the problem that if the position of the sealing cover is not initially connected and fixed, it will interfere with the subsequent welding and sealing work.

[0033] Specifically, in this embodiment, the movable component 200 is provided with two groups, which are centrally symmetrical, including a pushing member 201 and a rotating member 202, wherein one end of the pushing member 201 is arranged inside the shell plate 100, and the other end is in active contact with the rotating member 202 arranged inside the shell plate 100.

[0034] Preferably, the shell plate 100 is in a semicircular shape and is provided in two pieces. Each shell plate 100 includes a set of movable components 200. The diameter of the inner ring of the shell plate 100 is slightly larger than the outer diameter of the threading tube to be installed.

[0035] When in use, the staff puts the semi-circular shell plate 100 on the outer wall of the threading tube to be installed, and fits the two shell plates 100 together. At this time, the pushing member 201 is squeezed into the shell plate 100 by the outer wall of the threading tube, and drives the rotating member 202 to rotate and displace, so that the two groups of rotating members 202 are respectively stuck to the inner wall of the other shell plate 100. When an external force splits the shell plate 100 outward, the rotating member 202 presses against the inner wall of the shell plate 100, making the shell plate 100 unable to separate, thereby achieving preliminary fixation of the two shell plates 100.

[0036] In summary, by providing the shell plate 100, the pusher 201 and the rotating member 202, the initial connection and fixing effect of the shell plate 100 is achieved, and the problem that if the position of the sealing cover is not initially connected and fixed, it will interfere with the subsequent welding and sealing work is solved.

[0037] Example 2

[0038] Reference Figure 1-2 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment:

[0039] Specifically, the shell plate 100 includes a No. 1 accommodating groove 101, a No. 2 accommodating groove 102 and a snap-in groove 103, wherein the No. 1 accommodating groove 101 and the No. 2 accommodating groove 102 are both arranged inside the shell plate 100 and connected to each other through a sliding groove, and the snap-in groove 103 is away from the No. 2 accommodating groove 102 and is arranged inside the shell plate 100.

[0040] Preferably, the two shell plates 100 are respectively provided as shell plate A and shell plate B. During installation, the clamping groove 103 of shell plate A is connected with the second receiving groove 102 of shell plate B, that is, the shell plates A and B are symmetrical in center.

[0041] Furthermore, the pushing member 201 includes a clamping jaw 201a, a gear rod 201b and a pressing spring 201c, wherein the gear rod 201b and the side wall of the clamping jaw 201a are integrally made, the pressing spring 201c is sleeved on the rod body of the gear rod 201b, and one end of the pressing spring 201c is against the clamping jaw 201a, and the other end is against the side wall of the shell plate 100.

[0042] Preferably, the clamp 201a is arc-shaped, the diameter of its inner arc is equal to the outer diameter of the wire tube to be installed, and the side wall of the inner arc is covered with anti-slip and wear-resistant rubber material. When the shell plate 100 is spliced, the clamp 201a together with the pressing spring 201c are both received in the shell plate 100 and achieve a fixing effect relative to the wire tube.

[0043] Furthermore, the rotating member 202 includes a gear 202a, an arcuate rack 202b, a baffle 202c and a hook block 202d, wherein the gear 202a is arranged in the No. 1 receiving groove 101 to rotate and will not be displaced, the arcuate rack 202b is placed in a slide groove connecting the No. 1 receiving groove 101 and the No. 2 receiving groove 102, one end of which is in contact with the gear 202a, and the side wall of the other end is integrally connected with the baffle 202c, and the hook block 202d is integrally arranged at one end of the arcuate rack 202b and is in the No. 2 receiving groove 102.

[0044] Preferably, the arc-shaped rack 202b has a certain ductility. When the gear 202a drives the arc-shaped rack 202b to displace, the hook block 202d fixed at one end of the arc-shaped rack 202b can be squeezed from the shell plate 100 into the clamping groove 103 of another shell plate 100 and hook the side wall of the clamping groove 103.

[0045] Furthermore, a first rack 201b-1 is provided at one end of the rack rod 201b, and the first rack 201b-1 meshes with one side of the gear 202a. A second rack 202b-1 is provided at one end of the arc-shaped rack 202b, and the second rack 202b-1 meshes with the other side of the gear 202a.

[0046] Preferably, the gear 202a is always in meshing state with the first rack 201b-1 and the second rack 202b-1.

[0047] When in use, the staff aligns the two semicircular shell plates 100 with the two sides of the threading tube and splices them together. Due to the squeezing of the shell plate 100 on the threading tube, the clamping claw 201a begins to shrink towards the inside of the No. 1 accommodating groove 101 and compresses the pressing spring 201c. At this time, the gear rod 201b is displaced to drive the gear 202a to rotate, and the gear 202a synchronously drives the arc-shaped rack 202b meshing with it to be displaced. Under the movement of the arc-shaped rack 202b, the hook block 202d at one end thereof extends into the clamping groove 103 of the other shell plate 100 and hooks its side wall similar to a snap-fit ​​structure. At the same time, the baffle 202c presses against the side wall of the No. 2 accommodating groove 102 of the shell plate 100, so that the two shell plates 100 cannot be disengaged in the reverse direction, thereby achieving the effect of preliminary connection, and due to the reverse force of the pressing spring 201c, the shell plate 100 is close to the threading tube and will not be easily displaced, thereby achieving the effect of preliminary positioning.

[0048] In summary, by setting the shell plate, the pushing member and the rotating member, the effect of the initial connection and fixing of the shell plate is achieved, and the problem that if the position of the sealing cover is not initially connected and fixed, it will interfere with the subsequent welding and sealing work is solved.

[0049] Example 3

[0050] Reference Figure 3-4 , which is the third embodiment of the utility model. This embodiment is based on the previous two embodiments, but is different in that it provides a plugging device for a combination electrical expansion joint, which includes a main body component 300 and a sealing component 400, to achieve a sealing effect of the plugging device on the leaking part, and solves the problem that when a leak occurs at the connection of a fully enclosed combination electrical appliance, if the leak is not plugged in time, it will cause a large-scale power outage in the substation.

[0051] Specifically, the main component 300 includes a shell body 301 , an expansion joint 302 , and a threading tube 303 , wherein the shell body 301 is connected to the shell plate 100 , the threading tube 303 is inserted at both ends of the expansion joint 302 , and the expansion joint 302 is arranged inside the shell body 301 .

[0052] Preferably, the threading tube 303 contains SF6 insulating gas at a pressure of 0.45 MPa and a 220 KV high-voltage busbar, and the shell 302 is made of 1Cr18Ni9 stainless steel plate to prevent electromagnetic induction with the internal high-voltage busbar from causing danger.

[0053] Preferably, the shell body 302 is provided with two arc-shaped side plates, both of which are welded and fixed to the shell plate 100 on both sides, and a cylindrical cavity is formed after splicing, and the expansion joint 302 is wrapped. The outer wall of the shell body 302 is respectively installed with an inflation valve and a pressure gauge. When the final sealing is completed, SF6 with a pressure of 0.45Mpa is filled from the inflation valve on the shell, and the pressure gauge on the shell is observed to test the sealing effect.

[0054] Furthermore, the sealing assembly 400 includes a fixing member 401 and a pressing member 402 , wherein the pressing member 402 is connected to the shell plate 100 via the fixing member 401 .

[0055] Furthermore, the fixing member 401 includes a bolt 401 a and a nut 401 b , wherein one end of the bolt 401 a is welded and fixed to the body of the shell plate 100 , and the nut 401 b is matched with the bolt 401 a .

[0056] Furthermore, the pressing member 402 includes a cover plate 402a, an O-ring 402b and a triangular groove 402c, wherein the cover plate 402a is provided with two pieces and is in a semicircular ring shape, the triangular groove 402c is opened on the inner ring edge of the semicircular shell plate 100, and the O-ring 402b is sleeved on the tube body of the threading tube 303 and placed inside the triangular groove 402c.

[0057] Preferably, the cover plate 402a is in a circular ring shape after being spliced, and the inner diameter of the circular ring is equal to the outer diameter of the threading tube 303. The O-ring 402b is a silicone rubber sealing ring with a maximum operating pressure of 70 MPa and ductility.

[0058] Furthermore, through holes 402a-1 are formed through the cover plate 402a, and the number of through holes 402a-1 corresponds to the number of bolts 401a and nuts 401b, and the diameter of the through hole 402a-1 is slightly larger than the diameter of the bolt 401a, so that the bolt 401a can pass through the through hole 402a-1.

[0059] Furthermore, the body of the O-ring 402 b is provided with an oblique cut 402 b - 1 , and the O-ring 402 b is disconnected from the oblique cut 402 b - 1 , so that the O-ring 402 b can be sleeved on the threading tube 303 .

[0060] Preferably, after the O-ring is installed, 502 glue is applied to the bevel cut 402b-1 to close it, and sealant is applied to the contact surface between the O-ring and the triangular groove 402c. When the O-ring is squeezed, the bevel cut 402b-1 is deformed and fits tightly to achieve a sealing effect.

[0061] When in use, the staff will splice the shell body 301 to the outside of the expansion joint 302 where the leak occurs, and achieve preliminary connection positioning through the connecting mechanism, then place the O-ring 402b in the triangular groove 402c, and then place the cover plate 402a through the through hole 402a-1 onto the bolt 401a, and make the cover plate 402a close to the shell plate 100 by screwing the nut 401b. When the cover plate 402a is close, the O-ring 402b is squeezed and deformed, and the connection between the shell plate 100 and the threading tube 300 is blocked to achieve a sealing effect. Finally, argon arc welding is used to seamlessly weld the two shell bodies 301 and the shell plate 100. When the final sealing is completed, SF6 with a pressure of 0.45Mpa is filled from the inflation valve on the shell, and the pressure gauge on the shell is observed to test the sealing effect.

[0062] In summary, by providing the shell body, fixing parts and pressing parts, the sealing effect of the leak-proof device on the leaking part is achieved, thereby solving the problem that when a leak occurs at the connection of the fully enclosed combination electrical appliance, if the leak is not stopped in time, it will cause a large-scale power outage in the substation.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A connecting mechanism, characterized in that: include, Shell plate (100); and A movable component (200), the movable component (200) is movably arranged on one side of the shell plate (100), and comprises a pushing member (201) and a rotating member (202), the pushing member (201) is arranged on one side of the shell plate (100), and the rotating member (202) is connected to the pushing member (201); The pushing member (201) comprises a clamping claw (201a), a toothed rod (201b) and a pressing spring (201c); the toothed rod (201b) is arranged at one side of the first receiving groove (101) and connected to the clamping claw (201a); and the pressing spring (201c) is arranged on the rod body of the toothed rod (201b); The rotating member (202) comprises a gear (202a), an arc-shaped rack (202b), a baffle (202c) and a hook block (202d); one side of the gear (202a) is connected to the gear rod (201b); the first side of the arc-shaped rack (202b) is connected to the gear (202a); the baffle (202c) is connected to the second side of the arc-shaped rack (202b); and the hook block (202d) is away from the baffle (202c) and connected to one end of the arc-shaped rack (202b).

2. The connecting mechanism according to claim 1, characterized in that: The shell plate (100) comprises a first accommodating groove (101), a second accommodating groove (102) and a clamping groove (103); the first accommodating groove (101) is arranged on one side of the second accommodating groove (102) and is arranged inside the shell plate (100); the clamping groove (103) is away from the first accommodating groove (101) and the second accommodating groove (102) and is arranged inside the shell plate (100).

3. The connection mechanism according to claim 1, characterized in that: One end of the gear rod (201b) is provided with a first gear track (201b-1), and the first gear track (201b-1) is meshed with one side of the gear (202a); one end of the arc-shaped rack (202b) is provided with a second gear track (202b-1), and the second gear track (202b-1) is meshed with one side of the gear (202a).

4. A leak plugging device for combined electrical expansion joints, characterized in that: A connecting mechanism comprising any one of claims 1 to 3; and A main body component (300), the main body component (300) is arranged on one side of the shell plate (100), and comprises a shell body (301), an expansion joint (302), and a threading tube (303); the shell body (301) and the shell plate (100) are made in one piece, the expansion joint (302) and the threading tube (303) are arranged inside the shell body (301), and the threading tube (303) is connected to both ends of the expansion joint (302); A sealing component (400) is arranged on one side of the main component (300), and comprises a fixing member (401) and a pressing member (402), wherein the fixing member (401) is arranged on one side of the pressing member (402).

5. The leak-proof device for combined electrical expansion joints according to claim 4, characterized in that: The fixing member (401) comprises a bolt (401a) and a nut (401b), wherein the bolt (401a) is connected to one side of the shell body (301), and the nut (401b) is movably connected to the bolt (401a).

6. The leak-proof device for expansion joints of combined electrical appliances according to claim 5, characterized in that: The pressing member (402) comprises a cover plate (402a), an O-ring (402b) and a triangular groove (402c); the cover plate (402a) is arranged on one side of the shell body (301) and is fitted with the shell body (301) through the fixing member (401); the triangular groove (402c) is opened on one side of the shell plate (100); the O-ring (402b) is placed inside the triangular groove (402c) and is fitted with one side of the cover plate (402a).

7. The leak-proof device for expansion joints of combined electrical appliances according to claim 6, characterized in that: The cover plate (402a) comprises through holes (402a-1), and a plurality of the through holes (402a-1) are arranged through the body of the cover plate (402a). One end of the bolt (401a) passes through the through hole (402a-1) and is connected to the nut (401b).

8. The leak-proof device for expansion joints of combined electrical appliances according to claim 7, characterized in that: The O-type sealing ring (402b) comprises an oblique cut (402b-1), and the O-type sealing ring (402b) is disconnected from the oblique cut (402b-1).

Images