Engineering plastic insulating pull rod

Abstract

The utility model discloses an engineering plastic insulating pull rod, and relates to the technical field of pull rods. The pull rod comprises a pull rod body and a release piece, arc-shaped mounting blocks are symmetrically fixed at two ends of the pull rod body; arc-shaped mounting grooves are formed in the side surfaces of the arc-shaped mounting blocks; a plurality of annular plates are uniformly fixed on the inner wall of the arc-shaped mounting groove; the inner walls of the two arc-shaped mounting grooves are respectively provided with a spring nest and an insert nut; the spring nest and the insert nut are both made of 7075 aviation aluminum; an insulating sleeve is arranged on the peripheral side of the pull rod body; annular grooves are evenly formed in the circumferential side faces of the spring nest and the insert nut. The spring nest and the insert nut are both made of 7075 aviation aluminum, compared with a traditional 45 steel spring nest and insert nut, the spring nest and the insert nut are light in weight and easy to machine, meanwhile, the risk that electroplating and rusting cannot be carried out in a hole can be avoided, the overall weight of the pull rod can be reduced due to the light weight, the inertia of a circuit breaker during opening and closing is reduced, the opening and closing speed is increased, and the service life of the circuit breaker is prolonged. And the arc discharge time is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pull rods, in particular to an engineering plastic insulating pull rod. Background Art

[0002] The insulating rod of a circuit breaker is a key structural component that completes the electrical on-off operation of a GIS circuit breaker. Under the coupling effects of high electric fields and strong mechanical stress, defects in the insulating rod can easily cause surface flashover or breakdown failures, directly affecting the safe and stable operation of the switchgear and even the power system. Therefore, the reliability of the mechanical and electrical performance of the insulating rod is key to achieving both on-off and on-off operations.

[0003] Currently, the spring sockets and insert nuts in the insulating pull rods of traditional circuit breakers are usually made of 45 steel, which has higher strength and deformation resistance than ordinary A3 steel. However, the heavy weight of 45 steel makes it impossible to electroplate the holes in the components made of it. 45 steel is also prone to rust. The heavy weight will lead to greater inertia when the circuit breaker is opened and closed, reducing the opening and closing speed and prolonging the arcing time.

[0004] To this end, we provide an engineering plastic insulating pull rod to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an engineering plastic insulating pull rod, which is made of 7075 aviation aluminum by processing the spring socket and the insert nut. The rod has the characteristics of light weight and easy processing, and can avoid the risk of electroplating and rust in the hole. The light weight can reduce the overall weight of the pull rod, reduce the inertia of the circuit breaker during opening and closing, increase the opening and closing speed, and reduce the arcing time. It solves the problem that the existing spring socket and insert nut are usually made of 45 steel, have a large weight, cannot be electroplated in the hole of the manufactured component, and 45 steel is easy to rust. The large weight will lead to a large inertia when the circuit breaker is opened and closed, reduce the opening and closing speed, and prolong the arcing time.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model relates to an engineering plastic insulating pull rod, which comprises a pull rod body and a release member; arc-shaped mounting blocks are symmetrically fixed at both ends of the pull rod body; arc-shaped mounting grooves are formed in the side surfaces of the arc-shaped mounting blocks; a plurality of annular plates are uniformly fixed on the inner wall of the arc-shaped mounting groove in a linear array; a spring socket and an insert nut are respectively arranged on the inner walls of the two arc-shaped mounting grooves; the spring socket and the insert nut are both made of 7075 aviation aluminum; an insulating sleeve is arranged on the peripheral surface of the pull rod body; annular grooves are uniformly formed in the peripheral surfaces of the spring socket and the insert nut in a linear array; the peripheral surfaces of the spring socket and the insert nut are adapted to the inner wall of the arc-shaped mounting groove; the inner wall of the annular groove is adapted to the peripheral surface of the annular plate.

[0008] The utility model is further arranged as follows: the insulating sleeve is made of flexible rubber; the insulating sleeve comprises an arc section and two straight sections; the two straight sections are respectively fixed at both ends of the arc section; the arc section is wrapped around the peripheral surface of the pull rod body.

[0009] The utility model is further arranged as follows: connecting plates are fixed on the bottom surfaces of the two straight sections; a plurality of positioning grooves are uniformly formed in the side surfaces of the straight sections in a linear array; a plurality of anti-slip protrusions are uniformly fixed on the peripheral surface of the arc section in a circumferential array; anti-slip grooves are formed in the peripheral surfaces of the anti-slip protrusions.

[0010] The utility model is further arranged as follows: a sinking groove is formed in the peripheral surface of the pull rod body; a fixing groove is formed in the inner bottom surface of the sinking groove; the connecting plate is in plug-in fit with the fixing groove; the depth of the fixing groove is equal to the height of the connecting plate.

[0011] The utility model is further arranged as follows: a plurality of first sliding grooves are uniformly formed in the inner wall of the sinking groove in a linear array; a plurality of second sliding grooves are uniformly formed in the inner wall of the sinking groove in a linear array; the first sliding grooves and the second sliding grooves are respectively located on two parallel inner walls of the sinking groove.

[0012] The utility model is further arranged as follows: a first limiting member is arranged on the inner wall of the first sliding groove; the first limiting member comprises a first sliding plate slidably arranged on the inner wall of the first sliding groove; a first spring is connected between the first sliding plate and the first sliding groove; two first inclined plates are symmetrically fixed on the side surface of the first sliding plate; an insertion groove is formed between the two first inclined plates; the first inclined plate is in plug-in fit with the positioning groove.

[0013] The utility model is further arranged as follows: a second limiting member is arranged on the inner wall of the second sliding groove; the second limiting member comprises a second sliding plate slidably arranged on the inner wall of the second sliding groove; a second spring is connected between the second sliding plate and the second sliding groove; a second inclined plate is fixed on the side surface of the second sliding plate; the second inclined plate is located between the two first inclined plates; the second inclined plate is in plug-in fit with the insertion groove.

[0014] The present utility model is further configured as follows: the releasing member includes a releasing plate; an operation slot is formed through the side surface of the releasing plate; a plurality of releasing blocks are fixedly arranged on two opposite side surfaces of the releasing plate in a linear array in a uniformly symmetric manner; and the releasing blocks are inserted and matched with the positioning slots.

[0015] The present utility model has the following beneficial effects:

[0016] 1. Both the spring socket and the insert nut of the present utility model are made of 7075 aviation aluminum. Compared with the traditional spring socket and insert nut made of 45 steel, while meeting the mechanical properties of the pull rod, it has a lighter mass. At the same time, it can avoid the risks of non-electroplating and rusting in the hole, and the aluminum parts are also easy to process. The light mass can reduce the overall mass of the pull rod, reduce the inertia during the opening and closing of the circuit breaker, improve the opening and closing speed, and reduce the arcing time.

[0017] 2. The insulating sleeve of the present utility model is convenient for installation and disassembly. When installing, the first inclined plate and the second inclined plate limit the positioning slot, and then limit and fix the insulating sleeve, improving the installation tightness between the insulating sleeve and the pull rod body and reducing the risk of the insulating sleeve falling off. When disassembling, the releasing member releases the restrictions of the first inclined plate and the second inclined plate on the positioning slot, and the insulating sleeve can be easily removed. At the same time, both the anti-slip protrusions and the anti-slip grooves can play an anti-slip role when using the pull rod body.

[0018] Of course, it is not necessary for any product implementing the present utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of an engineering plastic insulating pull rod.

[0021] Figure 2 For the present utility model Figure 1 Cross-sectional view.

[0022] Figure 3 For the present utility model Figure 2 Enlarged view of area A.

[0023] Figure 4 For the present utility model Figure 2 Enlarged view of area B.

[0024] Figure 5 It is a cross-sectional view of the pull rod body of the present utility model.

[0025] Figure 6 This is a cross-sectional view of the insulating sleeve of the present utility model.

[0026] Figure 7 This is a schematic structural view of the release member of the present utility model.

[0027] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0028] 1 - pull rod body, 2 - arc-shaped mounting block, 3 - arc-shaped mounting groove, 4 - annular plate, 5 - spring socket, 6 - insert nut, 7 - insulating sleeve, 8 - annular groove, 9 - arc segment, 10 - straight segment, 11 - connecting plate, 12 - positioning groove, 13 - anti-slip protrusion, 14 - anti-slip groove, 15 - sinking groove, 16 - fixing groove, 17 - first chute, 18 - second chute, 19 - first limiting member, 20 - first sliding plate, 21 - first inclined plate, 22 - insertion slot, 23 - second limiting member, 24 - second sliding plate, 25 - second inclined plate, 26 - release member, 27 - release plate, 28 - operation slot, 29 - release block, 30 - first spring, 31 - second spring. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the 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 shall fall within the protection scope of the present utility model.

[0030] Specific embodiment one, please refer to Figure 1-7 , the present utility model is an engineering plastic insulating pull rod, including a pull rod body 1 and a release member 26; arc-shaped mounting blocks 2 are symmetrically fixed at both ends of the pull rod body 1; arc-shaped mounting grooves 3 are provided on the side surfaces of the arc-shaped mounting blocks 2; a plurality of annular plates 4 are uniformly fixed on the inner wall of the arc-shaped mounting groove 3 in a linear array; a spring socket 5 and an insert nut 6 are respectively arranged on the inner walls of the two arc-shaped mounting grooves 3; the spring socket 5 and the insert nut 6 are both made of 7075 aviation aluminum; an insulating sleeve 7 is arranged on the circumferential surface of the pull rod body 1; annular grooves 8 are uniformly opened on the circumferential surfaces of the spring socket 5 and the insert nut 6 in a linear array; the circumferential surfaces of the spring socket 5 and the insert nut 6 are adapted to the inner wall of the arc-shaped mounting groove 3; the inner wall of the annular groove 8 is adapted to the circumferential surface of the annular plate 4.

[0031] The operation process of this embodiment is as follows: Put the spring socket 5 and the insert nut 6 into the two arc-shaped installation grooves 3 respectively, so that the annular plate 4 is inserted and matched with the annular groove 8. The spring socket 5 and the insert nut 6 are both made of 7075 aviation aluminum. Compared with the traditional spring socket 5 and insert nut 6 made of 45 steel, while meeting the mechanical properties of the pull rod, it also has a lighter mass. At the same time, it can avoid the risk of non-electroplating and rusting in the hole, and the aluminum parts are also easy to process. The light mass can reduce the overall mass of the pull rod, reduce the inertia during the opening and closing of the circuit breaker, improve the opening and closing speed, and reduce the arcing time.

[0032] Specific embodiment two, please refer to Figure 1-7 , on the basis of specific embodiment one, the insulating sleeve 7 is made of flexible rubber; the insulating sleeve 7 includes an arc section 9 and two straight sections 10; the two straight sections 10 are respectively fixed at both ends of the arc section 9; the arc section 9 is wrapped around the circumferential side surface of the pull rod body 1.

[0033] Specifically, connecting plates 11 are fixed on the bottom surfaces of the two straight sections 10; a number of positioning grooves 12 are uniformly and linearly arrayed and penetrated through the side surfaces of the straight section 10; a number of anti-slip protrusions 13 are uniformly and circumferentially arrayed and fixed on the circumferential side surface of the arc section 9; anti-slip grooves 14 are formed on the circumferential side surface of the anti-slip protrusion 13.

[0034] Furthermore, a sinking groove 15 is formed on the circumferential side surface of the pull rod body 1; a fixing groove 16 is formed on the inner bottom surface of the sinking groove 15; the connecting plate 11 is inserted and matched with the fixing groove 16; the depth of the fixing groove 16 is equal to the height of the connecting plate 11.

[0035] Furthermore, a number of first sliding grooves 17 are uniformly and linearly arrayed and formed on the inner wall of the sinking groove 15; a number of second sliding grooves 18 are uniformly and linearly arrayed and formed on the inner wall of the sinking groove 15; the first sliding groove 17 and the second sliding groove 18 are respectively located on two parallel inner walls of the sinking groove 15.

[0036] Furthermore, a first limiting member 19 is arranged on the inner wall of the first sliding groove 17; the first limiting member 19 includes a first sliding plate 20 slidably arranged on the inner wall of the first sliding groove 17; a first spring 30 is connected between the first sliding plate 20 and the first sliding groove 17; two first inclined plates 21 are symmetrically fixed on the side surface of the first sliding plate 20; an insertion groove 22 is formed between the two first inclined plates 21; the first inclined plate 21 is inserted and matched with the positioning groove 12.

[0037] Furthermore, a second limiting member 23 is arranged on the inner wall of the second sliding groove 18; the second limiting member 23 includes a second sliding plate 24 slidably arranged on the inner wall of the second sliding groove 18; a second spring 31 is connected between the second sliding plate 24 and the second sliding groove 18; a second inclined plate 25 is fixed on the side surface of the second sliding plate 24; the second inclined plate 25 is located between the two first inclined plates 21; the second inclined plate 25 is inserted and matched with the insertion groove 22.

[0038] The operation process of this embodiment is as follows: When installing the insulating sleeve 7, expand the insulating sleeve 7, wrap the arc section 9 around the circumferential side of the pull rod body 1, and then press the straight section 10 downward along the sinking groove 15, so that the connecting plate 11 pushes the first inclined plate 21 and the second inclined plate 25 to slide. Furthermore, the first inclined plate 21 pushes the corresponding first sliding plate 20 to slide along the inner wall of the first sliding groove 17, squeezing the first spring 30. At the same time, the second inclined plate 25 pushes the corresponding second sliding plate 24 to slide along the inner wall of the second sliding groove 18, squeezing the second spring 31. Furthermore, the first inclined plate 21 and the second inclined plate 25 gradually move away from each other, and the second inclined plate 25 gradually leaves the insertion slot 22. Furthermore, the connecting plate 11 gradually inserts into the fixing slot 16. When the connecting plate 11 completely enters the fixing slot 22, the connecting plate 11 is disengaged from the first inclined plate 21 and the second inclined plate 25. Furthermore, the first spring 30 and the second spring 31 respectively push the first inclined plate 21 and the second inclined plate 25 to slide, so that the first inclined plate 21 is inserted into the positioning slot 12 and the second inclined plate 25 is inserted into the insertion slot 22. Furthermore, the straight section 10 is limited, and the straight section 10 cannot be pulled out by pulling upward. Furthermore, the installation of the insulating sleeve 7 is completed, improving the installation tightness between the insulating sleeve 7 and the pull rod body 1 and reducing the risk of the insulating sleeve 7 falling off. At the same time, both the anti-slip protrusions 13 and the anti-slip grooves 14 can play a role in anti-slip when using the pull rod body 1.

[0039] Specific Embodiment Three. Please refer to Figure 1-7 , based on Specific Embodiment One and Specific Embodiment Two, the releasing member 26 includes a releasing plate 27; an operation groove 28 is formed through the side surface of the releasing plate 27; a plurality of releasing blocks 29 are fixedly arranged on two opposite side surfaces of the releasing plate 27 in a linear array in a uniformly symmetric manner; the releasing blocks 29 are in plug-in fit with the positioning slots 12.

[0040] The operation process of this embodiment is as follows: When it is necessary to remove the insulating sleeve 7, hold the operation groove 28 of the handheld releasing member 26 and press the releasing plate 27 downward along the two straight sections 10. Furthermore, the releasing plate 27 pushes the first inclined plate 21 and the second inclined plate 25 to slide. Furthermore, the first inclined plate 21 pushes the corresponding first sliding plate 20 to slide along the inner wall of the first sliding groove 17, squeezing the first spring 30. At the same time, the second inclined plate 25 pushes the corresponding second sliding plate 24 to slide along the inner wall of the second sliding groove 18, squeezing the second spring 31. Furthermore, the first inclined plate 21 and the second inclined plate 25 gradually move away from each other, and the second inclined plate 25 gradually leaves the insertion slot 22. When the releasing plate 27 is pressed down until the releasing block 29 coincides with the positioning slot 12, the releasing plate 27 is inserted into the positioning slot 12, and the first inclined plate 21 and the second inclined plate 25 leave the positioning slot 12. At this time, pull the releasing plate 27 upward, driving the two straight sections 10 to be pulled upward, and further pulling the connecting plate 11 out of the fixing slot 16, and then the insulating sleeve 7 can be removed, which is convenient for disassembly.

[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0042] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An engineering plastic insulating pull rod, comprising a pull rod body (1) and a release member (26); characterized in that: Arc-shaped mounting blocks (2) are symmetrically fixed at both ends of the pull rod body (1); an arc-shaped mounting groove (3) is formed on the side surface of the arc-shaped mounting block (2); a plurality of annular plates (4) are evenly fixed on the inner wall of the arc-shaped mounting groove (3) in a linear array. A spring socket (5) and an insert nut (6) are respectively arranged on the inner walls of the two arc-shaped mounting grooves (3); both the spring socket (5) and the insert nut (6) are made of 7075 aviation aluminum; an insulating sleeve (7) is arranged on the peripheral surface of the pull rod body (1). Circular grooves (8) are evenly formed on the peripheral surfaces of the spring socket (5) and the insert nut (6) in a linear array; the peripheral surfaces of the spring socket (5) and the insert nut (6) are adapted to the inner wall of the arc-shaped mounting groove (3); the inner wall of the circular groove (8) is adapted to the peripheral surface of the annular plate (4).

2. The engineering plastic insulating pull rod according to claim 1, characterized in that The insulating sleeve (7) is made of flexible rubber; the insulating sleeve (7) includes an arc section (9) and two straight sections (10); the two straight sections (10) are respectively fixed at both ends of the arc section (9); the arc section (9) is wrapped around the peripheral surface of the pull rod body (1).

3. The engineering plastic insulating pull rod according to claim 2, characterized in that Connecting plates (11) are fixed on the bottom surfaces of the two straight sections (10); a plurality of positioning grooves (12) are evenly formed through the side surfaces of the straight sections (10) in a linear array; a plurality of anti-slip protrusions (13) are evenly fixed on the peripheral surface of the arc section (9) in a circumferential array; anti-slip grooves (14) are formed on the peripheral surface of the anti-slip protrusion (13).

4. The engineering plastic insulating pull rod according to claim 3, characterized in that A sinking groove (15) is formed on the peripheral surface of the pull rod body (1); a fixing groove (16) is formed on the inner bottom surface of the sinking groove (15); the connecting plate (11) is inserted and matched with the fixing groove (16); the depth of the fixing groove (16) is equal to the height of the connecting plate (11).

5. The engineering plastic insulating pull rod according to claim 4, characterized in that A plurality of first sliding grooves (17) are evenly formed on the inner wall of the sinking groove (15) in a linear array; a plurality of second sliding grooves (18) are evenly formed on the inner wall of the sinking groove (15) in a linear array; the first sliding groove (17) and the second sliding groove (18) are respectively located on two parallel inner walls of the sinking groove (15).

6. The engineering plastic insulating pull rod according to claim 5, characterized in that The inner wall of the first sliding groove (17) is provided with a first limiting member (19); the first limiting member (19) includes a first sliding plate (20) slidably arranged on the inner wall of the first sliding groove (17); a first spring (30) is connected between the first sliding plate (20) and the first sliding groove (17); two first inclined plates (21) are symmetrically fixed to the side surface of the first sliding plate (20); a plugging groove (22) is formed between the two first inclined plates (21); the first inclined plate (21) is in plugging fit with the positioning groove (12).

7. The engineering plastic insulating pull rod according to claim 6, characterized in that The inner wall of the second sliding groove (18) is provided with a second limiting member (23); the second limiting member (23) includes a second sliding plate (24) slidably arranged on the inner wall of the second sliding groove (18); a second spring (31) is connected between the second sliding plate (24) and the second sliding groove (18); a second inclined plate (25) is fixed to the side surface of the second sliding plate (24); the second inclined plate (25) is located between the two first inclined plates (21); the second inclined plate (25) is in plugging fit with the plugging groove (22).

8. The engineering plastic insulating pull rod according to claim 7, characterized in that The releasing member (26) includes a releasing plate (27); an operation groove (28) is formed through the side surface of the releasing plate (27); a plurality of releasing blocks (29) are symmetrically and uniformly fixed to the two opposite side surfaces of the releasing plate (27) in a linear array; the releasing block (29) is in plugging fit with the positioning groove (12).

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