Insulating pull rod for switchgear

Abstract

The present invention provides an insulating pull rod for a switchgear, which belongs to the technical field of insulating pull rods, and comprises a plurality of unit rods, which are spliced ​​together in sequence to form a pull rod; a pull head is installed on the top of the pull rod, and the pull head comprises a limit frame with a top opening and a limit rod connected to the limit frame and staggered with the top opening, and a reinforcement component is arranged between adjacent unit rods. The reinforcement component in the insulating pull rod for the switchgear strengthens the connection between adjacent unit rods in the form of internal support reinforcement, effectively improves the overall strength of the pull rod, provides a stable and reliable operating basis for the pull head, and has the advantages of convenient assembly, easy operation, high stability and reliability, and at the same time, combined with the improvement and optimization of the pull head structure, further improves the convenience, stability and controllability of the pull head working process.

Description

Technical Field

[0001] The invention relates to the technical field of insulating pull rods, in particular to an insulating pull rod for a switch device. Background Art

[0002] The insulating pull rod is an important component used to operate electrical equipment such as high-voltage circuit breakers or disconnectors. It mainly consists of a pull head and a rod body. During the work process, the staff controls the pull head through the rod body to connect with the switch component on the switch device at a safe distance, and then pulls or pushes the switch component in the correct direction to control the opening or closing of the switch device, thereby avoiding direct or close contact with live parts and ensuring personal safety.

[0003] The structural strength, stability and reliability of the existing insulating pull rod need to be further improved. Because it usually works at a long distance, the rod is long and is generally made of multiple tubular rods threaded together, so the overall strength is limited. During use, it is easy to deform and shake, which affects its stability and reliability, thereby increasing the difficulty of operation and work risks for the staff. Secondly, the pull head of the existing insulating pull rod is usually used in conjunction with the pull ring 6 to increase the stability of the working process. Figure 1 As shown, the pull ring 6 is installed on the switch member 7. During the operation, the pull head needs to be inserted into the pull ring 6, and then pulled down or pushed up to complete the opening or closing of the switch device. However, it is easily affected by the working distance and reduces the convenience of the working process. That is, the staff controls the pull head through the rod body and controls the pull head to be inserted into the pull ring 6 by visual judgment at a distance. It is easily affected by the distance and vision and cannot quickly and smoothly insert the pull head into the pull ring 6. Summary of the invention

[0004] The invention provides an insulating pull rod for a switch device, so as to solve the problems of low structural strength, stability and reliability of the insulating pull rod in the related art.

[0005] The present invention provides an insulating pull rod for a switchgear, which comprises a plurality of unit rods, which are sequentially spliced ​​together to form a pull rod; a pull head is installed on the top of the pull rod, and the pull head comprises a limit frame with a top opening and a limit rod connected to the limit frame and staggered with the top opening, and the limit frame limits the pulled member from both sides and the limit rod limits the pulled member from above by rotating the pull rod; a reinforcement component is arranged between adjacent unit rods, and the reinforcement component comprises: an inner support member, which is distributed in one of the unit rods along the circumference of the unit rods and is hinged to the unit rod, and the inner support member in the unit rod extends to another unit rod Rod; Adjacent unit rods are each provided with a clamping head and a clamping seat that cooperate with each other, the clamping seat is installed on the unit rod, the clamping head is connected to the inner support member, one of the unit rods is connected with a sliding limit member, the sliding limit member slides and synchronously controls the rotation of the inner support member, so that the clamping head and the clamping seat are pressed against the connection between adjacent unit rods to form an inner support reinforcement area; A control component is installed in the pull rod, the control component includes a control end and a plurality of sliding rods, the sliding rods correspond to the unit rods one by one and are slidably connected in the corresponding unit rods, the sliding rods are spliced ​​together to form a control rod, the sliding limit members are all connected to the control rod, the control end is installed at the bottom of the pull rod and controls the sliding of the control rod.

[0006] In one possible implementation, the inner support member is a strip-shaped structure and is bent, the clamping head is a cylindrical structure and the two clamping heads on the inner support member are respectively located on the inner and outer sides of the inner support member, the clamping seat includes a connecting seat and a plurality of socket joints, the socket joints are paired with the clamping heads, and the socket joints include an arc-shaped bearing surface that cooperates with the clamping head and a connecting block that abuts against the inner support member.

[0007] In a possible implementation, the sliding limiter includes a sliding seat rotatably provided with a contact roller, the contact roller corresponds to the inner support member one by one, the sliding seat is slidably connected in the corresponding unit rod, and a tripod is fixedly connected between the sliding seat and the control rod.

[0008] In one possible implementation, the adjacent unit rods are threadedly connected, the sliding rod includes a sliding part and a rotating part, the sliding limiter is connected to the sliding part of the corresponding sliding rod, and the clamping seat corresponding to the clamping head on the outer side of the inner support member also includes a center sleeve, and a fixed rod is connected between the center sleeve and the connecting seat. The center sleeve is located outside the corresponding unit rod and inside another unit rod, and a limiting groove is provided on the center sleeve, and a limiting strip matching the limiting groove is fixedly connected to the sliding part.

[0009] In one possible implementation, a locking piece is provided between adjacent sliding rods, and the locking piece includes an automatic snap joint, a snap seat and a push-to-unlock head. The automatic snap joint and the push-to-unlock head are both installed on the sliding part, and the snap seat is fixedly installed on the sliding part. During the process of connecting and locking adjacent sliding rods, the snap joint on the sliding part is automatically snapped together with the snap seat. During the unlocking process, as the pull rod is reset, the push-to-unlock head presses the automatic snap joint to unlock the door under the limit of the center sleeve during the process of passing through the center sleeve, wherein the snap seat is an annular structure, and the number of automatic snap joints is multiple and distributed along the circumference of the snap seat.

[0010] In one possible implementation, the control end includes a sliding block fixedly connected to a screw, a mounting seat slidably connected to the screw, and a control sleeve rotatably connected to the mounting seat. The mounting seat is fixedly connected to the bottom of the pull rod, the sliding block is slidably connected to the unit rod at the bottom, and the control sleeve is threadedly connected to the screw.

[0011] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. According to an insulating pull rod for a switch device provided in an embodiment of the present invention, the strengthening component strengthens the connection between adjacent unit rods by internal support strengthening, thereby improving the overall strength of the pull rod, providing a stable and reliable operating basis for the pull head, and having the advantages of convenient assembly, easy operation, high stability and reliability. At the same time, combined with the improvement and optimization of the pull head structure, the convenience, stability and controllability of the pull head working process are further improved.

[0012] 2. According to an embodiment of the present invention, an insulating pull rod for a switch device is provided. During the process of assembling the unit rods to form the pull rod, the internal sliding rods are automatically connected together to form a control rod. After the assembly is completed, it is only necessary to rotate the control sleeve to stably control the movement of the sliding limiter through the control rod, so that the clamping head on the inner support member is tightly pressed against the corresponding clamping seat, forming an inner support reinforcement area to increase the strength of the pull rod and facilitate assembly, disassembly and operation.

[0013] 3. According to an embodiment of the present invention, an insulating pull rod for a switch device is provided. The clamping seat cooperates with the clamping head. On the one hand, the unit rod is limited in the axial direction to improve the stability and reliability of the connection state of the unit rod. On the other hand, the unit rod is clamped and limited in the radial direction to increase the stability of the unit rod position state and the connection strength of adjacent unit rods, thereby effectively improving the structural strength of the pull rod as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the common working state of the insulating pull rod.

[0015] Figure 2 The present invention is a schematic diagram of the overall structure of an insulating pull rod for a switch device provided in an embodiment of the present invention.

[0016] Figure 3 The present invention is a schematic structural diagram of a pull head of an insulating pull rod for a switch device provided in an embodiment of the present invention.

[0017] Figure 4 The present invention is a schematic cross-sectional structural diagram of a pull rod of an insulating pull rod for a switch device provided in an embodiment of the present invention.

[0018] Figure 5 It is a structural schematic diagram of a tightening seat and a sliding limiter of an insulating pull rod for a switch device provided by an embodiment of the present invention.

[0019] Figure 6 The invention is a schematic structural diagram of a clamping head and a socket head of an insulating pull rod for a switch device provided by an embodiment of the present invention.

[0020] Figure 7 It is a structural schematic diagram of a control assembly of an insulating pull rod for a switch device provided by an embodiment of the present invention.

[0021] Figure 8 The present invention is a schematic structural diagram of a center sleeve, a slide bar, a limit groove and a limit strip of an insulating pull rod for a switch device provided in an embodiment of the present invention.

[0022] Fig. 9 The invention is a schematic structural diagram of a locking member of an insulating pull rod for a switch device provided in an embodiment of the present invention.

[0023] Fig.10 The present invention is a schematic cross-sectional structural diagram of a unit rod of an insulating pull rod for a switch device provided in an embodiment of the present invention.

[0024] In the figure: 1, unit rod; 2, pull head; 21, limit frame; 22, limit rod; 23, installation head; 3, pulled member; 4, strengthening component; 41, inner support member; 42, tight head; 43, tight seat; 431, connecting seat; 4311, fixing block; 4312, annular sleeve; 432, socket head; 4321, arc-shaped bearing surface; 4322, connecting block; 433, center sleeve; 434, fixing rod; 435, limit groove; 436, limit strip; 44, sliding limit Parts; 441, contact roller; 442, sliding seat; 443, tripod; 45, mounting ring 1; 46, mounting ring 2; 5, control assembly; 51, control end; 511, screw rod; 512, sliding block; 513, mounting seat; 514, control sleeve; 52, sliding rod; 521, sliding part; 522, rotating part; 53, locking part; 531, buckle joint; 532, buckle seat; 533, push-to-unlock head; 54, support block; 6, pull ring; 7, switch part. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] See also Figure 2 , Figure 3 and Figure 4 An insulating pull rod for a switchgear comprises a plurality of unit rods 1, wherein the unit rods 1 are sequentially spliced ​​from top to bottom to form a pull rod, such as Figure 2 As shown, the pull rod is composed of three unit rods 1, a pull head 2 is installed on the top of the pull rod, and a reinforcement component 4 is arranged between adjacent unit rods 1. The reinforcement component 4 is located inside the pull rod, and the connection between adjacent unit rods 1 is strengthened by the reinforcement component 4, which effectively improves the stability and connection strength of the connection between adjacent unit rods 1, and effectively improves the strength of the pull rod as a whole, so that it is convenient to stably and reliably operate the pull rod to control the pull head 2 to pull down or push up the pulled part 3, and the pulled part 3 is a switch component, so as to control the opening and closing of the switch device. At the same time, through the improvement and optimization of the structure of the pull head 2, the convenience, stability and controllability of the pull rod controlling the pull head 2 to pull down or push up are improved, and the influence of the staff's vision and working distance on the working process is reduced.

[0027] See also Figure 1 , Figure 2 and Figure 3 The slider 2 includes a limit frame 21 with a top opening, a mounting head 23, and a limit rod 22 connected to the limit frame 21 and staggered with the top opening. Figure 2 As shown, the limit frame 21 is a U-shaped structure and is fixedly connected to the mounting head 23. The mounting head 23 is fixedly mounted on the top of the pull rod, that is, the mounting head 23 is mounted on the top of the uppermost unit rod 1. The limit rod 22 is fixedly connected to the left end of the limit frame 21 and is vertically distributed with the limit frame 21. In the process of pulling down the pulled member 3, the pull rod is first moved up so that the pulled member 3 enters the limit frame 21 from the top opening. Figure 3 As shown in the upper middle view, the pull rod is then rotated so that the limit frame 21 limits the pull member 3 from both sides and the limit rod 22 limits the pull member 3 from the top, as shown in FIG. Figure 3As shown in the view in the lower middle, at this time, the pulled member 3 is in a relatively stable state under the limitation of the limit frame 21 and the limit rod 22, which is convenient for quickly and stably completing the pulling-down work of the pulled member 3. After the pulled member 3 is pulled down, it is only necessary to reverse the pull rod to reset it, and release the limitation of the limit rod 22 on the pulled member 3, so that the pull head 2 can be quickly separated from the pulled member 3. The whole process is very convenient and fast, and there is no need to cooperate with the pull ring 6, which effectively reduces the influence of factors such as the staff's vision and working distance on the working process. In the process of pushing up, the aforementioned method can be selected to push the pulled member 3 up quickly and stably, or the pushing-up work can be further simplified. After the pulled member 3 enters the limit frame 21, the pull head 2 is directly pushed up to quickly control the pulled member 3 to move up and reset. In this process, the pulled member 3 can also be smoothly reset under the limitation of the limit frame 21. In addition, the limit rod 22 in the present invention can also cooperate with the pull ring 6 to pull or push, so that the present invention has a variety of working modes, and the corresponding working mode can be flexibly selected according to actual conditions.

[0028] participate Figure 2 , Figure 4 , Figure 5 , Figure 6 and Fig. 9 The strengthening assembly 4 includes an inner support member 41, a tightening head 42, a tightening seat 43, a sliding stopper 44 and a mounting ring 1 45. The number of the inner support members 41 is three, and the three inner support members 41 are evenly distributed along the circumference of the unit rod 1. The three inner support members 41 are hingedly mounted on the lower unit rod 1 of the two adjacent unit rods 1 through the mounting ring 1 45 and are located at the top of the corresponding unit rod 1. Figure 5 As shown, the inner support members 41 are all hinged on the mounting ring 45, and the mounting ring 45 is fixedly mounted on the top area of ​​the corresponding unit rod 1 and is located inside the unit rod 1. The inner support member 41 is a strip structure and is bent, and the upper end of the inner support member 41 is inserted upward from the bottom of the corresponding upper unit rod 1 into the upper unit rod 1, and the abutment head 42 is respectively connected to the upper and lower ends of the inner support member 41, combined with Figure 5 and Figure 6 As shown, the abutting head 42 located at the upper end of the inner support member 41 is also located on the outer side of the inner support member 41, and the abutting head 42 located at the lower end of the inner support member 41 is also located on the inner side of the inner support member 41. The abutting seats 43 are respectively arranged in adjacent unit rods 1 and respectively cooperate with the abutting heads 42 in the corresponding unit rods 1. In order to facilitate distinction and understanding, the abutting seats 43 in the same reinforcement component 4 are distinguished and defined according to the installation positions of the abutting seats 43 on the corresponding unit rods 1, as shown in FIG. Figure 5As shown, the abutment seat 43 corresponding to the abutment head 42 at the upper end of the inner support member 41 is located at the lower end of the corresponding unit rod 1, which will be referred to as the abutment seat 43 at the lower end hereinafter, and the abutment seat 43 corresponding to the abutment head 42 at the lower end of the inner support member 41 is located at the upper end of the corresponding unit rod 1, which will be referred to as the abutment seat 43 at the upper end hereinafter, and the sliding limit member 44 is slidably connected to the unit rod 1 located below in the adjacent unit rod 1 up and down, and the sliding limit member 44 controls the rotation of the inner support member 41 by limiting, as shown in FIG. Figure 5 As shown, after the unit rods 1 are fixedly connected together in sequence to form a pull rod, the sliding stopper 44 is moved downward to limit the inner support member 41 so that the inner support member 41 rotates until the abutting head 42 on the inner support member 41 is tightly abutted against the corresponding abutting seat 43, and the combination Figure 5 and Figure 6 As shown, after the inner support member 41 rotates to make the clamping head 42 and the corresponding clamping seat 43 clamped, an inner support reinforcement area is formed at the connection between adjacent unit rods 1, thereby improving the stability and reliability of the connection state of adjacent unit rods 1, thereby increasing the strength of the pull rod and improving its stability and reliability during use.

[0029] See also Figure 5 and Figure 6 The sliding limit member 44 includes a sliding seat 442 rotatably provided with a contact roller 441, the contact roller 441 corresponds to the inner support member 41 one by one, the sliding seat 442 is slidably connected with the corresponding unit rod 1, the contact roller 441 is in rolling contact with the inner support member 41, the friction between the two is reduced, and the smoothness and stability of the rotation support process of the inner support member 41 are improved.

[0030] See also Figure 5 and Figure 6 The abutting head 42 is a cylindrical structure, the abutting seat 43 includes a connecting seat 431 and a plurality of socket joints 432, the socket joints 432 correspond to the abutting head 42 one by one, and the socket joints 432 include an arc-shaped receiving surface 4321 matched with the abutting head 42 and a connecting block 4322 abutting against the inner support member 41, such as Figure 6As shown, when the abutting head 42 on the inner support member 41 is tightly abutted against the corresponding abutting seat 43, the abutting head 42 located at the top of the inner support member 41 abuts against the arc-shaped receiving surface 4321 from above to limit the connection block 4322, and the abutting head 42 at the bottom abuts against the corresponding arc-shaped receiving surface 4321 from below to limit the connection block 4322, thereby limiting the adjacent unit rods 1 in the axial direction, improving the stability and reliability of the connection state of the adjacent unit rods 1, and increasing the connection strength of the adjacent unit rods 1. At the same time, the upper end of the inner support member 41 abuts against the corresponding connection block 4322 from the inside to the outside, and the lower end abuts against the corresponding connection block 4322 from the outside to the inside. Leaning on the corresponding connecting block 4322, the adjacent unit rods 1 are supported in the radial direction, so as to improve the stability and reliability of the connection state of the adjacent unit rods 1, increase the connection strength of the adjacent unit rods 1, and effectively improve the strength of the pull rod as a whole, wherein the connecting seat 431 at the lower end is an annular structure, and the connecting seat 431 at the upper end is an annular sleeve 4312 with a fixed block 4311, and the annular sleeve 4312 is fixedly installed in the corresponding unit rod 1 through the fixed block 4311, and the corresponding socket 432 is fixedly installed on the annular sleeve 4312 and the annular sleeve 4312 and the corresponding unit rod 1 are distributed with a gap, so as to provide sufficient space for the rotation of the inner support member 41.

[0031] See also Figure 2 , Figure 4 , Figure 5 and Figure 7 A control assembly 5 is installed in the pull rod, and the control assembly 5 includes a control end 51, a plurality of slide rods 52 and a support block 54. The slide rods 52 correspond to the unit rods 1 one by one and the slide rods 52 are slidably connected to the corresponding unit rods 1 through the support blocks 54, such as Figure 2 As shown, the slide bar 52 is slidably connected with the support block 54, and the support block 54 is fixedly installed in the corresponding unit rod 1 to provide support for the slide bar 52, thereby improving the stability of the position state of the slide bar 52. A tripod 443 is fixedly connected between the slide seat 442 and the slide bar 52 in the corresponding unit rod 1. When the unit rods 1 are fixedly connected together to form a pull rod, the slide bars 52 in the unit rod 1 are spliced ​​together to form a control rod. The slide seats 442 are fixedly connected to the control rod through the tripod 443. The sliding of the slide seats 442 can be uniformly controlled by moving the control rod. The control end 51 is installed at the bottom of the pull rod and controls the sliding of the control rod. Figure 7As shown, the control end 51 includes a sliding block 512 fixedly connected to a screw rod 511, a mounting seat 513 slidably connected to the screw rod 511, and a control sleeve 514 rotatably connected to the mounting seat 513. The mounting seat 513 is fixedly connected to the bottom of the pull rod, that is, the bottom of the bottom unit rod 1. The sliding block 512 is slidably connected to the bottom unit rod 1. The control sleeve 514 is threadedly connected to the screw rod 511. The sliding rod 52 in the bottom unit rod 1 is connected to the sliding block 512. The control sleeve 514 is rotated to control the screw rod 511 to move up and down. The control rod can be controlled to move up and down through the sliding block 512. It is very convenient and fast, and has high stability.

[0032] See also Figure 4 , Figure 5 , Figure 8 , Fig. 9 and Fig.10 The upper and lower adjacent unit rods 1 are threadedly connected. During the assembly process, one of the unit rods 1 can be rotated to quickly and firmly connect the two adjacent unit rods 1 together. The lower end of the abutting seat 43 is rotatably connected to the unit rod 1. During the rotational connection of the adjacent unit rods 1, the abutting head 42 and the corresponding abutting seat 43 are in a relatively stable state, ensuring that they can be stably abutted together later. Figure 5 As shown, the connecting seat 431 in the lower end of the abutting seat 43 is rotatably connected with a mounting ring 2 46, and the mounting ring 2 46 is fixedly installed in the corresponding unit rod 1. The abutting seat 43 at the lower end also includes a center sleeve 433, and a fixing rod 434 is connected between the center sleeve 433 and the connecting seat 431. A limiting groove 435 is provided on the center sleeve 433. The sliding rod 52 includes a sliding part 521 and a rotating part 522. The sliding part 521 is limitedly slidably connected in the corresponding unit rod 1, and the rotating part 522 is rotatably connected to the lower end of the sliding part 521. The sliding part 521 only slides in the axial direction of the corresponding unit rod 1 and is inserted into the upper unit rod 1 and is detachably fixedly connected to the rotating part 522 located in the unit rod 1. The rotating part 522 can slide with the sliding part 521 and can be independently Rotation, a limiting strip 436 matching the limiting groove 435 is fixedly connected to the sliding part 521. Before the adjacent unit rods 1 are rotated and connected, the sliding part 521 in the corresponding unit rod 1 is inserted into the center sleeve 433, and the limiting strip 436 thereon is inserted through the corresponding limiting groove 435. The center sleeve 433 is limited by the cooperation between the limiting strip 436 and the limiting groove 435. The center sleeve 433 limits the corresponding connecting seat 431 through the fixed rod 434, so that the socket head 432 on the connecting seat 431 and the corresponding clamping head 42 are in a relatively stable position state, which is not affected by the rotation connection process of the adjacent unit rods 1. Afterwards, during the connection process of the adjacent unit rods 1, the sliding part 521 is continuously inserted until it is abutted and connected with the corresponding rotating part 522.

[0033] See also Figure 5 , Figure 8 and Fig. 9 A locking member 53 is provided between adjacent slide bars 52. The locking member 53 includes an automatic buckle joint 531, a buckle seat 532, and a push-to-release head 533. The automatic buckle joint 531 and the push-to-release head 533 are both mounted on the sliding portion 521 and are located at the top of the sliding portion 521. Fig. 9 As shown, the automatic snap joint 531 is rotatably connected to the sliding part 521 and a spring member is connected between the sliding part 521, the push-to-unlock head 533 is slidably connected to the sliding part 521, and the snap-in seat 532 is fixedly installed on the rotating part 522 and is located at the bottom of the rotating part 522. Before the adjacent unit rods 1 are connected, the sliding part 521 passes through the corresponding center sleeve 433 to the corresponding rotating part 522, and the corresponding automatic snap joint 531 and the push-to-unlock head 533 pass through the center sleeve 433. Then, during the rotational connection of the adjacent unit rods 1, as the corresponding sliding rods 52 are tightened, the automatic snap joint 531 is automatically snapped together with the snap-in seat 532, thereby locking and connecting the adjacent sliding rods 52 together. When all the sliding rods 52 are locked and connected to form a control rod, the control rod can be pulled down, and when the control rod is pulled down During the unlocking process, the pressing and unlocking head 533 will not pass through the center sleeve 433, and in the unlocking process, the reset control rod is first moved up, and then the adjacent unit rods 1 are separated. During the separation of the adjacent unit rods 1, when the center sleeve 433 passes through the corresponding pressing and unlocking head 533, it presses the automatic snap joint 531 to release the locking state of the automatic snap joint 531 and the snap seat 532. In order to prevent the rotation of the rotating part 522 from affecting the automatic snap connection between the snap seat 532 and the automatic snap joint 531, the snap seat 532 is set to a ring structure, which can be automatically snapped together with the automatic snap joint 531 even if it rotates. In order to improve the stability of the snap connection, multiple automatic snap joints 531 are set. The automatic snap joints 531 are distributed along the circumference of the snap seat 532, and multiple snap connection points are formed during the snap connection process to improve the stability of the snap connection.

[0034] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An insulating pull rod for a switchgear, characterized in that: It comprises a plurality of unit rods (1), wherein the unit rods (1) are sequentially spliced ​​together to form a pull rod; A pull head (2) is installed on the top of the pull rod, and the pull head (2) comprises a limit frame (21) with a top opening and a limit rod (22) connected to the limit frame (21) and staggered with the top opening. By rotating the pull rod, the limit frame (21) limits the pulled member (3) from both sides, and the limit rod (22) limits the pulled member (3) from the top. A reinforcement component (4) is provided between adjacent unit rods (1), and the reinforcement component (4) comprises: An internal support member (41), the internal support member (41) is distributed in one of the unit rods (1) along the circumference of the unit rods (1) and is hinged to the unit rod (1), and the internal support member (41) in the unit rod (1) extends into another unit rod (1); Adjacent unit rods (1) are each provided with a mutually cooperating abutting head (42) and abutting seat (43), the abutting seat (43) being mounted on the unit rod (1), the abutting head (42) being connected to the inner support member (41), one of the unit rods (1) being connected with a sliding stopper (44), the sliding stopper (44) slidingly and synchronously controlling the rotation of the inner support member (41), so that the abutting head (42) and the abutting seat (43) abut against the connection between the adjacent unit rods (1) to form an inner support reinforcement zone; A control assembly (5) is installed in the pull rod, and the control assembly (5) includes a control end (51) and a plurality of sliding rods (52). The sliding rods (52) correspond to the unit rods (1) one by one and are slidably connected in the corresponding unit rods (1). The sliding rods (52) are spliced ​​together to form a control rod. The sliding limiters (44) are all connected to the control rods. The control end (51) is installed at the bottom of the pull rod and controls the sliding of the control rod.

2. The insulating pull rod for a switchgear according to claim 1, characterized in that: The inner support member (41) is a strip-shaped structure and is in a bent shape. The abutting head (42) is a cylindrical structure. The two abutting heads (42) on the inner support member (41) are respectively located on the inner and outer sides of the inner support member (41). The abutting seat (43) includes a connecting seat (431) and a plurality of socket joints (432). The socket joints (432) correspond to the abutting heads (42) one by one, and the socket joints (432) include an arc-shaped receiving surface (4321) matched with the abutting head (42) and a connecting block (4322) abutting against the inner support member (41).

3. An insulating pull rod for a switchgear according to claim 1 or 2, characterized in that: The sliding stopper (44) comprises a sliding seat (442) rotatably provided with a contact roller (441), the contact roller (441) corresponding to the inner support member (41) one by one, the sliding seat (442) being slidably connected in the corresponding unit rod (1), and a tripod (443) being fixedly connected between the sliding seat (442) and the control rod.

4. An insulating pull rod for a switchgear according to claim 1 or 2, characterized in that: The adjacent unit rods (1) are threadedly connected, the sliding rod (52) includes a sliding part (521) and a rotating part (522), the sliding limiter (44) is connected to the sliding part (521) of the corresponding sliding rod (52), and the abutment seat (43) corresponding to the abutment head (42) on the outer side of the inner support member (41) also includes a center sleeve (433), a fixed rod (434) is connected between the center sleeve (433) and the connecting seat (431), the center sleeve (433) is located outside the corresponding unit rod (1) and inside another unit rod (1), and a limit groove (435) is provided on the center sleeve (433), and a limit strip (436) matching the limit groove (435) is fixedly connected to the sliding part (521).

5. The insulating pull rod for a switchgear according to claim 4, characterized in that: A locking member (53) is provided between adjacent sliding bars (52), and the locking member (53) comprises an automatic snap joint (531), a snap seat (532) and a push-to-release head (533). The automatic snap joint (531) and the push-to-release head (533) are both mounted on the sliding part (521), and the snap seat (532) is fixedly mounted on the rotating part (522). During the process of connecting and locking adjacent sliding bars (52), the automatic snap joint (531) on the sliding part (521) is automatically snapped together with the snap seat (532). During the unlocking process, as the pull rod is reset, the push-to-release head (533) passes through the center sleeve (433) and presses the automatic snap joint (531) under the limit of the center sleeve (433) to unlock the door.

6. The insulating pull rod for a switchgear according to claim 5, characterized in that: The buckle seat (532) is an annular structure, and the number of automatic buckle joints (531) is several and distributed along the circumference of the buckle seat (532).

7. The insulating pull rod for a switchgear according to claim 1, characterized in that: The control end (51) comprises a sliding block (512) fixedly connected to a screw rod (511), a mounting seat (513) slidably connected to the screw rod (511), and a control sleeve (514) rotatably connected to the mounting seat (513); the mounting seat (513) is fixedly connected to the bottom of the pull rod, the sliding block (512) is slidably connected to the unit rod (1) at the bottom, and the control sleeve (514) is threadedly connected to the screw rod (511).

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