Disconnecting link cover plate

Abstract

The invention relates to the technical field of power equipment protection, in particular to a disconnecting link cover plate which comprises a housing, an opening and closing connecting mechanism, a cross arm avoiding sliding groove assembly and a disconnecting link bolt avoiding sliding groove assembly, the housing is composed of a first housing part and a second housing part, and the opening and closing connecting mechanism comprises two connecting rods which are connected with the cross arm avoiding sliding groove assembly and the disconnecting link bolt avoiding sliding groove assembly. The two ends of each connecting rod are hinged to the corresponding side edges of the first housing part and the second housing part through hinge shafts respectively. The vertical guide blind groove and the vertical sliding plate can adapt to cross arms of different heights, and interference between the cross arms and the cover plate is avoided; the bottom of the blind groove is closed to prevent rainwater and foreign matters from entering and improve insulation reliability. According to the invention, the transverse strip hole and the transverse sliding plate realize full-coverage avoidance for the disconnecting link bolt; the sliding plate can form a closable window above the bolt, the bolt can be exposed only by sliding the corresponding sliding plate during maintenance, and overall disassembly is not needed. The method can be completed by one person within 5-7 minutes, and the tripping frequency caused by bird nesting is reduced by more than or equal to 90%; the power-off time is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment protection, in particular to a quickly installable glass fiber reinforced plastic cover plate suitable for a 10kV distribution network line knife switch. Background Art

[0002] Mountainous areas are densely forested, and bird nesting can cause serious tripping of 10kV lines, necessitating comprehensive bird damage inspection and control. However, the fiberglass covers and conventional rubber-plastic sheaths currently in use are complex to install. Conventional fiberglass covers are time-consuming and have inconsistent mounting holes. Conventional rubber-plastic sheaths have several drawbacks: ① a short service life; ② interference with power outages during line switching operations; ③ the inability to locate potential line faults if a line clamp burns out, significantly hindering repairs; and ④ complex installation. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a knife switch cover to solve the problems of the existing knife switch cover, such as difficulty in installation, short service life, interference with power outages, and inability to timely detect line hidden dangers, and greatly improve the safe and reliable operation of the distribution network.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] The present invention provides a knife gate cover plate, comprising:

[0006] The cover shell is composed of a first cover shell portion and a second cover shell portion, wherein the cover shell is provided with only a front side plate, a rear side plate and a top plate, but without a bottom plate and left and right side plates;

[0007] The opening and closing connection mechanism includes: two connecting rods, respectively provided at the left and right ends of the bottom of the cover, and the two ends of each connecting rod are hinged to the corresponding side edges of the first cover part and the second cover part through a hinge axis, forming a four-bar hinge mechanism;

[0008] There are two sets of cross arm avoidance chute components, which are arranged in parallel and spaced apart in the central area of ​​the top plate. Each set includes:

[0009] A vertical guide blind groove is opened downward from the top surface of the top plate and has a depth of 2 / 3 of the cover shell height;

[0010] Two pairs of vertical clamping plates are respectively clamped on the front side plate and the rear side plate corresponding to the vertical guide blind groove to form a vertical guide gap;

[0011] A plurality of vertical slide plates arranged side by side can be inserted into the vertical guide gap in a sliding manner to avoid the cross arm;

[0012] There are four sets of knife gate bolt avoidance chute components, two by two symmetrically distributed at the four corners of the top plate. Each set includes:

[0013] Transverse strip holes are opened in the top plate in the transverse direction;

[0014] The transverse clamping plate is clamped at the transverse strip holes to form a horizontal guide gap;

[0015] A plurality of horizontal slide plates arranged side by side can be inserted into the horizontal guide gap in a horizontal sliding manner to avoid the knife gate bolts;

[0016] Furthermore, it includes two S-shaped hook hinges, which are arranged at intervals along the longitudinal direction on the center line of the top plate, and the upper hook portion of each S-shaped hook hinge is hooked to the first bolt of the top plate of the first cover portion, and the lower hook portion is hooked to the second bolt of the top plate of the second cover portion, so as to realize the opening, closing and position limiting of the cover;

[0017] Furthermore, the vertical clamping plate is detachably connected to the front or rear side plate by bolts, and the horizontal clamping plate is detachably connected to the top plate by bolts.

[0018] Furthermore, the ends of the vertical slide and the transverse slide are elastically clamped by corresponding clamping plates, and maintain the position after sliding in the absence of external force.

[0019] Furthermore, the cover shell, connecting rod, vertical slide plate, transverse slide plate, vertical clamping plate and transverse clamping plate are all made of glass fiber reinforced plastic insulation material.

[0020] The advantages and positive effects of the present invention are:

[0021] 1. The cover adopts an inverted U-shaped, bottom-panel-less design, retaining only the front and rear side panels and the top panel, eliminating the bottom panel and left and right side panels. This reduces weight by ≥30%, allowing on-site handling and installation by one person. The side-opening structure allows for direct insertion from the side of the crossarm, eliminating the need to disassemble the switch or crossarm, reducing installation time from the traditional 40 minutes to 7 minutes.

[0022] 2. The opening and closing angle of the opening and closing mechanism of the present invention is ≥120°, and the hanging point can be quickly detached, realizing tool-free disassembly and assembly; after closing, a rigid frame is formed, which can resist wind pressure >50N and will not loosen during long-term operation.

[0023] 3. The vertical guide blind groove and vertical slide of the present invention can adapt to crossarms of different heights (100-180mm). After the slide is sunk, a channel of ≥60mm is left to avoid interference between the crossarm and the cover plate; the bottom of the blind groove is closed to prevent rainwater and foreign objects from entering, thereby improving insulation reliability.

[0024] 4. The transverse strip holes and transverse slides of the present invention fully cover and avoid the M12-M20 specification knife gate bolts; the slides can form a closable window above the bolts. During maintenance, only the corresponding slides need to be slid to expose the bolts without the need for overall disassembly, which improves maintenance efficiency by 80%.

[0025] 5. The invention can be completed by one person in 5-7 minutes, which is ≥80% shorter than traditional cover panels; the number of tripping caused by bird nesting is reduced by ≥90%; power outage time is reduced and operation and maintenance costs are lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view of the knife gate cover of the present invention;

[0027] Figure 2 A top view of the knife gate cover plate of the present invention;

[0028] Figure 3 It is a bottom view of the knife gate cover plate of the present invention;

[0029] Figure 4 This is a photo of the knife gate cover of the present invention (first perspective in closed state);

[0030] Figure 5 This is a real photo of the knife gate cover of the present invention (second viewing angle in closed state);

[0031] Figure 6 This is a photo of the knife gate cover of the present invention (in the open state);

[0032] Figure 7 Schematic diagram of the installation position of the knife gate cover plate of the present invention;

[0033] Figure 8 This is a schematic diagram of the knife gate cover plate of the present invention in use. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the scope of protection of the present invention cannot be limited thereto.

[0035] This embodiment takes the on-site installation of a 10kV distribution network switch as an example. Figure 1-8 The knife gate cover is further described as follows: the knife gate cover comprises: a cover shell 1, an opening and closing connection mechanism, a cross arm avoidance chute assembly and a knife gate bolt avoidance chute assembly.

[0036] The housing 1 consists of a first housing section and a second housing section, with an overall inverted U-shaped cross-section. Only the front, rear, and top panels remain, leaving the bottom panel and left and right side panels untouched. This structure significantly reduces weight while facilitating the sideways insertion of the switch and crossarm. The top panel is integrally molded with the front and rear side panels, is 3mm thick, and is made of SMC fiberglass reinforced plastic with an insulation rating of ≥45kV / 1min.

[0037] The opening and closing connection mechanism includes two connecting rods 8 and two S-shaped hook hinges 7.

[0038] Two connecting rods 8, made of φ8mm 304 stainless steel round steel, are located at the left and right ends of the bottom of the housing 1. Each connecting rod 8 is hinged to the front and rear side panels of the first and second housing sections via M6 stainless steel hinge shafts, forming a four-bar hinge mechanism that allows the housing to open and close around its longitudinal axis.

[0039] Two S-shaped hook hinges 7 are arranged 200mm apart along the longitudinal centerline of the top plate. The upper hook portion of each S-shaped hook hinge is attached to the first bolt shank of the top plate of the first housing portion, and the lower hook portion is attached to the second bolt shank of the top plate of the second housing portion. The bolt heads form an anti-drop limiter to ensure that the hook does not fall off during opening and closing.

[0040] There are two groups of cross arm avoidance chute assemblies, which are arranged in parallel in the central area of ​​the top plate, with the spacing matching the width of the cross arm on site, including vertical guide blind groove 4, vertical splint 3 and vertical slide plate 2.

[0041] The vertical guide blind groove 4 is milled downward from the top surface of the top plate, with a depth of about 50 mm, which is 2 / 3 of the cover height, and a groove width of 50 mm.

[0042] The vertical clamping plate 3 is made of 2mm thick SMC fiberglass plate and is fixed to the front / rear side plate with two M4 bolts on each side to form a vertical guide gap with a net width of 50mm.

[0043] The vertical slide plate 2 is a 100mm long, 4mm wide, 2mm thick SMC fiberglass strip. Several vertical slide plates 2 are inserted side by side into the vertical guide gap and can slide up and down. The avoidance position is adjusted on site according to the height of the cross arm.

[0044] There are four sets of knife gate bolt avoidance chute assemblies, two of which are symmetrically distributed at the four corners of the top plate, maintaining a preset safety distance from the cross arm avoidance chute assembly. The knife gate bolt avoidance chute assembly includes: transverse strip holes, transverse clamping plates 5 and multiple transverse slide plates 6.

[0045] The transverse strip holes are 120 mm long and 12 mm wide, and are laser cut in the top plate along the transverse direction.

[0046] The horizontal clamping plate 5 is also made of 2mm thick SMC glass fiber reinforced plastic plate, which is clamped to the upper and lower hole edges of the horizontal strip hole by M4 bolts to form a horizontal guide gap with a net height of 2mm.

[0047] Horizontal slide plate 6: SMC glass fiber reinforced plastic strip with a length of 100 mm, a width of 55 mm and a thickness of 2 mm; a plurality of horizontal slide plates 6 are inserted into the horizontal guide gap side by side and can slide left and right to avoid the knife gate bolt.

[0048] On-site installation steps for this knife gate cover:

[0049] ① Pull the S-shaped hook hinge 7 to open the cover;

[0050] ②Put the cover on the side of the cross arm and the knife switch;

[0051] ③ Closed cover;

[0052] ④ Slide the vertical slide 2 up and down according to the height of the cross arm, and slide the horizontal slide 6 left and right according to the position of the knife switch bolt to complete the avoidance.

[0053] Field verification at a State Grid power supply company in June 2024 showed that the installation time for a single set was reduced from the traditional 40 minutes to 9 minutes; the number of bird tripping events decreased by 92%; and the material insulation test was conducted at 45kV / 1 minute with no breakdown. This fully complies with the requirements of the "State Grid Corporation of China Electric Power Safety Work Regulations (Substation Section)" and is suitable for field application.

[0054] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of the present invention.

Claims

1. A knife gate cover, characterized in that: include: The cover (1) is composed of a first cover part and a second cover part, wherein the cover (1) is provided with only a front side plate, a rear side plate and a top plate, and has no bottom plate and left and right side plates; The opening and closing connection mechanism comprises: two connecting rods (8), respectively arranged at the left and right ends of the bottom of the cover (1), and the two ends of each connecting rod (8) are respectively hinged to the corresponding side edges of the first cover part and the second cover part through a hinge shaft, forming a four-link hinge mechanism; There are two sets of cross arm avoidance chute components, which are arranged in parallel and spaced apart in the central area of ​​the top plate. Each set includes: A vertical guide blind groove (4) is provided downward from the top surface of the top plate and has a depth of 2 / 3 of the height of the cover; Two pairs of vertical clamping plates (3) are respectively clamped on the front side plate and the rear side plate corresponding to the vertical guide blind groove (4) to form a vertical guide gap; A plurality of vertical slide plates (2) arranged side by side can be inserted into the vertical guide gap in a sliding manner up and down to avoid the cross arm; There are four sets of knife gate bolt avoidance chute components, two by two symmetrically distributed at the four corners of the top plate. Each set includes: Transverse strip holes are opened in the top plate in the transverse direction; A transverse clamping plate (5) is clamped at the transverse strip hole to form a horizontal guide gap; A plurality of transverse slide plates (6) arranged side by side can be inserted into the horizontal guide gap in a horizontal sliding manner to avoid the knife gate bolts.

2. The knife gate cover according to claim 1, characterized in that: It also includes two S-shaped hook hinges (7) arranged at intervals along the longitudinal direction on the center line of the top plate, the upper hook portion of each S-shaped hook hinge being hooked to a first bolt on the top plate of the first housing portion, and the lower hook portion being hooked to a second bolt on the top plate of the second housing portion, thereby realizing the opening, closing and position limiting of the housing (1).

3. The knife gate cover according to claim 1, characterized in that: The vertical clamping plate (3) is detachably connected to the front or rear side plate via bolts, and the horizontal clamping plate (5) is detachably connected to the top plate via bolts.

4. The knife gate cover according to claim 1, characterized in that: The ends of the vertical slide plate (2) and the transverse slide plate (6) are elastically clamped by corresponding clamping plates, and maintain their positions after sliding in the absence of external force.

5. The knife gate cover according to claim 1, characterized in that: The cover shell (1), connecting rod (8), vertical slide plate (2), transverse slide plate (6), vertical clamping plate (3) and transverse clamping plate (5) are all made of glass fiber reinforced plastic insulation material.

Images