Dustproof cleaning cover for tulip contact of vacuum circuit breaker

Abstract

The utility model discloses a vacuum circuit breaker tulip contact dustproof cleaning cover, and belongs to the technical field of circuit breaker maintenance. The vacuum circuit breaker tulip contact dustproof cleaning cover comprises a middle cylinder; a middle cylinder cover plate is arranged, an elastic supporting cylinder wall is fixed to the middle cylinder cover plate, and an opening is formed in the end, away from the middle cylinder cover plate, of the elastic supporting cylinder wall. The cylindrical dust cover is arranged on the outer layer of the elastic supporting cylinder wall; one end is provided with a guide ring, the other end is provided with a first flange, and the first flange is provided with a plurality of threaded blind holes; the middle cylinder cover plate and the first flange are in butt joint and fixed through a bolt; the outer side wiping cloth is arranged between the cylindrical dust cover and the elastic supporting cylinder wall in a sleeving manner; a second flange is arranged at one end of the middle barrel cover plate and is fixed between the middle barrel cover plate and the barrel-shaped dust cover; and the inner side wiping cloth is arranged in the elastic supporting cylinder wall and is fixed relative to the middle cylinder cover plate. The cleaning efficiency of the tulip contact can be improved, and equipment faults caused by the fact that foreign matter enters a switch cabinet along with the contact can be prevented.

Description

Technical Field

[0001] The utility model relates to a technology in the field of vacuum circuit breaker maintenance, in particular to a dustproof cleaning cover for plum blossom contacts of a vacuum circuit breaker. Background Art

[0002] The plum blossom contact is a key primary component of a vacuum circuit breaker. The vacuum circuit breaker connects to the static contacts in the switch cabinet through the plum blossom contact, enabling reliable transmission of electrical energy. Dirt on the surface of the plum blossom contact will increase the contact resistance, causing the switch contacts to heat up. In extreme cases, this can lead to a fire in the switch cabinet. According to statistics from relevant scholars, power supply accidents caused by heating in the switch cabinet account for as much as 42% of common power system failures. Therefore, cleaning and maintaining the plum blossom contact has always been a key task in circuit breaker maintenance. Currently, there is a lack of specialized tools for cleaning and maintaining the plum blossom contact, which presents the following difficulties.

[0003] ① Low cleaning efficiency and blind spots

[0004] Manual cleaning with waste silk cloth is not only inefficient, but also difficult to reach the inner root during cleaning due to the long length of some large-capacity contacts, resulting in blind spots in cleaning.

[0005] ②Contacts are prone to repeated contamination during maintenance

[0006] During actual maintenance, a single circuit breaker outage involves over ten procedures, including mechanical inspections, adjustments, electrical tests, and mechanical tests, often lasting over twenty days. The cleanliness of the circuit breaker's contact surfaces is crucial for the success of numerous tests, including the primary circuit resistance and the insulation of the circuit breaker itself. During circuit breaker maintenance, the switchgear must also be inspected, requiring the vacuum circuit breaker to be exposed outside the switchgear. Certain areas of coal-fired power plants, such as desulfurization towers, experience high concentrations of dust and acidic gases, making the exposed contact surfaces susceptible to further contamination. Therefore, during maintenance, the contacts require frequent cleaning to ensure smooth testing.

[0007] ③ There is a risk of foreign matter intrusion causing switch cabinet failure

[0008] The center hole of the plum blossom contact is narrow and deep, making it difficult to detect insects and ants from outside the cabinet during maintenance. These insects can easily enter the switch cabinet along with the contacts, causing malfunctions. Furthermore, to address the need for frequent contact cleaning, some maintenance personnel temporarily shield the contacts with flexible coverings such as shower caps and shoe covers. Due to dim on-site lighting, these coverings are easily overlooked. Furthermore, because these coverings are soft and easily foldable, they can enter the static contact barrel of the switch cabinet along with the plum blossom contacts, causing frequent malfunctions.

[0009] In order to solve the above problems in the prior art, the present invention is provided. Utility Model Content

[0010] In response to the above-mentioned deficiencies in the prior art, the utility model proposes a dust-proof cleaning cover for the plum blossom contacts of a vacuum circuit breaker, which can avoid repeated contamination during the storage of the circuit breaker, while avoiding repetitive maintenance of a single device, improving the cleaning efficiency of the plum blossom contacts, and preventing equipment failures caused by foreign matter entering the switch cabinet with the contacts.

[0011] The utility model relates to a vacuum circuit breaker plum blossom contact dustproof cleaning cover, comprising:

[0012] The middle tube is provided with a middle tube cover plate; the middle tube cover plate has a plurality of through holes evenly distributed along the circumference, and an elastic support tube wall is fixed to the back of the middle tube cover plate, and the elastic support tube wall is opened at one end away from the middle tube cover plate;

[0013] The cylindrical dust cover is arranged on the outer layer of the elastic support cylinder wall; a guide ring is provided at one end, and a first flange is provided at the other end, and a threaded blind hole is provided on the first flange corresponding to the through hole on the middle cylinder cover plate; the first flange is fixed to the middle cylinder cover plate by bolts;

[0014] The outer wiping cloth is sleeved between the cylindrical dust cover and the elastic supporting cylinder wall; one end of the cloth is provided with a second flange, and the second flange is fixed between the middle cylinder cover and the cylindrical dust cover; and

[0015] The inner wiping cloth is arranged in the elastic supporting cylinder wall and is fixed relatively to the middle cylinder cover plate.

[0016] For some specific implementation schemes, the middle tube cover plate, the first flange and the second flange are all provided with alignment grooves to facilitate the alignment and fixation of the cylindrical dust cover, the middle tube and the outer wiping cloth.

[0017] For some specific implementation plans, the main body of the cylindrical dust cover is a thin-walled cylinder made of PP injection molding, which is light and thin and prevents static dust accumulation; the guide ring is made of rubber, which facilitates the dust cover to be put into the contact and avoids damaging the circuit breaker contacts due to direction deviation; in order to effectively prevent the dust cleaning cover from being brought into the switch cabinet, the outer surface of the cylindrical dust cover is sprayed with fluorescent material, which serves to remind the operator when the lighting conditions are poor.

[0018] For some specific implementation plans, the middle cylinder is made of PP material, in which the elastic support cylinder wall is a circumferentially continuous structure or a discontinuous structure; preferably, a circumferentially uniformly distributed discontinuous structure, that is, an arc-shaped support cylinder wall, is adopted to support and fix the outer wiping cloth during the cleaning process; after the dust-proof cleaning cover is put into the contact, the arc-shaped support piece undergoes elastic deformation to make the outer wiping cloth close to the outer surface of the contact, avoiding the displacement and deformation of the wiping cloth and inadequate cleaning, thereby ensuring clean wiping.

[0019] For some specific implementation plans, the middle tube cover is provided with a handle, which extends out from the outer edge of the middle tube cover. The length of the handle is greater than the diameter of the static contact barrel of the switch cabinet, forming an anti-fool structure. This anti-fool design can prevent the dust cover from entering the switch cabinet with the circuit breaker and causing a short circuit fault. At the same time, the large-size handle makes it easier for employees to operate while wearing gloves, thereby improving the convenience of taking out the dust cleaning cover.

[0020] For some specific implementation plans, the middle tube cover is provided with an anti-loss rope hole on the side. By tying the anti-loss rope, the dustproof cleaning cover is fixed in the designated maintenance area to avoid the loss of the dustproof cleaning cover due to chaotic management of the maintenance site. At the same time, it prevents the dustproof cleaning cover from entering the switch cabinet with the circuit breaker.

[0021] For some specific implementation plans, a cleaning status identification plate and / or a maintenance information slot is provided on the front of the middle tube cover, so that on-site maintenance and management personnel can intuitively understand the equipment maintenance status, facilitate the review and tracing of equipment maintenance records, and improve work efficiency.

[0022] For some specific implementation plans, the outer wiping cloth is made of melamine foam, which has high strength, good elasticity, is not easy to be damaged, and has good cleaning properties. It can be used with cleaning agents such as alcohol. The main body of the outer wiping cloth is cylindrical, and the inner diameter is made according to the size of the plum blossom contact. It can effectively prevent the wiping cloth from falling on the circuit breaker during cleaning and causing safety accidents.

[0023] For some specific implementation plans, the inner wiping cloth is a cylindrical structure and is made of melamine foam material; a through hole is opened axially in the center of the cylinder, and a countersunk hole is opened at the end away from the middle tube cover plate. Correspondingly, the middle tube cover plate is provided with a fixing hole, and a through-hole fixing rod is passed through the through hole. The through-hole fixing rod is fixed to the fixing hole of the middle tube cover plate, thereby completing the fixation of the inner wiping cloth.

[0024] Preferably, the through-hole fixing rod body is a screw rod, one end of the screw rod is provided with a plum blossom handle made of rubber material, and the other end of the screw rod is provided with a square end portion. Correspondingly, the fixing hole of the middle cylinder cover plate is a threaded through hole. When in use, the screw rod is screwed into the through hole of the inner wiping cloth through the plum blossom handle to prevent the hard material from hitting the circuit breaker contacts when the dust-proof cleaning cover is put into the contact. The thickness of the square end portion is less than the thickness of the middle cylinder cover plate, which is used to indicate the fixing status of the inner wiping cloth. After the through-hole fixing rod is tightened, the elastic rubber plum blossom handle falls into the countersunk hole. When the square end portion is not exposed to the middle cylinder cover plate, it indicates that the inner wiping cloth is not tightened and there is a risk of falling off. When the square end portion is completely exposed to the middle cylinder end cover, it indicates that the inner wiping cloth is over-compressed, which can easily cause the wiping cloth to be damaged and aged.

[0025] Compared with the prior art, the present invention has the following technical effects:

[0026] 1) After the dustproof cleaning cover is put on the contact, the inner and outer wiping cloths are tightly attached to the inner and outer walls of the contact. The dustproof cleaning cover can be rotated to clean the contact surface. The design of the arc-shaped support cylinder wall ensures the fit of the wiping cloth. The inner and outer wiping cloths are designed according to the size of the contact, which completely solves the problem that existing tools and methods are difficult to clean the base of the contact.

[0027] 2) The use of dustproof cleaning covers can effectively cover the circuit breaker contacts, preventing dust from falling on the contacts when the circuit breaker is stored outside the cabinet, which would result in the need for rework and cleaning.

[0028] 3) The use of dustproof cleaning covers can effectively cover the circuit breaker contacts, preventing insects and ants from drilling into the switch cabinet and causing faults through the contacts during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0030] Figure 2 This is a schematic diagram of the explosion structure of Example 1;

[0031] Figure 3 This is a schematic diagram of the middle tube structure in Example 1;

[0032] Figure 4 This is a schematic structural diagram of the cylindrical dust cover in Example 1;

[0033] Figure 5 This is a schematic structural diagram of the outer wiping cloth in Example 1;

[0034] Figure 6 This is a schematic structural diagram of the inner wiping cloth in Example 1;

[0035] Figure 7 This is a schematic structural diagram of the through-hole fixing rod in Example 1;

[0036] Figure 8 This is a schematic diagram of the fixed state of the inner wiping cloth in Example 1;

[0037] In the figure: 100, middle cylinder; 101, middle cylinder cover; 102, elastic support cylinder wall; 103, handle; 104, anti-lost rope hole; 105, cleaning status identification plate; 106, maintenance information slot; 107, threaded hole; 200, cylindrical dust cover; 201, first flange; 202, guide ring; 203, threaded blind hole; 204, Yuanbao bolt; 300, outer wiping cloth; 302, second flange; 400, inner wiping cloth; 401, through hole; 402, countersunk hole; 500, through-hole fixing rod; 501, plum blossom handle; 502, square end; 600, alignment groove. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0039] Example 1

[0040] like Figure 1 and Figure 2 As shown, this embodiment includes: a middle tube 100 , a cylindrical dust cover 200 , an outer wiping cloth 300 , an inner wiping cloth 400 and a through-hole fixing rod 500 .

[0041] The middle tube 100 is made of PP material and has a structure like Figure 3 As shown; includes a middle cylinder cover plate 101, the middle cylinder cover plate 101 is hot-melt bonded with an elastic support cylinder wall 102, the elastic support cylinder wall 102 is provided at one end away from the middle cylinder cover plate 101.

[0042] A handle 103 is provided on the middle cylinder cover 101. Both ends of the handle 103 extend out of the outer edge of the middle cylinder cover 101. The radial length of the handle is greater than the diameter of the static contact barrel of the switch cabinet, forming an anti-fool structure.

[0043] The middle tube cover 101 is provided with an anti-lost rope hole 104 on the side, and an anti-lost rope is tied in the anti-lost rope hole 104 to fix the dustproof cleaning cover in a designated maintenance area.

[0044] The middle cover plate 101 features a cleaning status sign 105 on the left front side and a maintenance information slot 106 on the right front side. The cleaning status sign 105 is a slider that displays the status of the circuit breaker contacts, either cleaned or uncleaned. Alternatively, it can be slotted to display a card with the corresponding label. This design clearly displays the cleanliness status of the circuit breaker contacts, preventing oversight or duplicate cleaning. The maintenance information slot 106 stores maintenance information cards, facilitating easy access and tracing of maintenance work.

[0045] In this embodiment, the elastic supporting cylinder wall 102 is preferably an arc-shaped supporting cylinder wall. Four circumferentially evenly distributed arc-shaped supporting cylinder walls constitute the elastic supporting cylinder wall 102 to support the outer wiping cloth 300.

[0046] The cylindrical dust cover 200 is made of PP material by injection molding and is arranged on the outer layer of the elastic support cylinder wall 102. The main body is a thin-walled cylindrical structure. Figure 4As shown; a first flange 201 is provided at one end of the cylindrical dust cover 200, and a soft and elastic rubber guide ring 202 is fixed at the other end to prevent collision and impact; a plurality of threaded blind holes 203 are provided on the first flange 201, preferably, 4 threaded blind holes are evenly distributed around the circumference; correspondingly, 4 through holes are provided on the middle cylinder cover plate, and Yuanbao bolts 204 pass through the through holes to connect and fix the first flange 201 to the middle cylinder cover plate 101; the outer surface of the cylindrical dust cover is sprayed with fluorescent material, which serves to remind the operator when the lighting conditions are poor.

[0047] like Figure 2 and Figure 5 As shown, the outer wiping cloth 300 is cylindrical and nested between the tubular dust cover 200 and the elastic support wall 102. A second flange 302 is provided at one end, with a through-hole through which a bolt 204 passes to secure the second flange 302 between the middle cover 101 and the first flange 201. The outer wiping cloth is made of melamine foam and can be used with cleaning agents such as alcohol. The inner diameter of the outer wiping cloth is tailored to the size of the plum blossom contact.

[0048] like Figure 6 and Figure 8 As shown, the main body of the inner wiping cloth 400 is cylindrical and made of melamine foam; a through hole 401 is axially opened at the center of the cylinder, and a countersunk hole 402 is provided at the end of the through hole 401 away from the middle tube cover 101; correspondingly, the middle tube cover is provided with a through threaded hole 107; a through-hole fixing rod 500 is passed through the through hole 401, and the through-hole fixing rod 500 is fixed to the threaded hole 107 of the middle tube cover to complete the fixation of the inner wiping cloth.

[0049] like Figure 7 As shown, the through-hole fixing rod 500 is a screw rod, one end of the screw rod is provided with a plum blossom handle 501 made of rubber material, and the other end of the screw rod is provided with a square end 502; when in use, the screw rod is screwed into the through hole 401 of the inner wiping cloth through the plum blossom handle 501; the thickness of the square end 502 is less than the thickness of the middle tube cover plate, which is used to indicate the fixing status of the inner wiping cloth; after the through-hole fixing rod is tightened, the elastic rubber plum blossom handle falls into the countersunk hole, and when the square end does not expose the middle tube cover plate, it indicates that the inner wiping cloth is not tightened and there is a risk of falling off. When the square end is completely exposed from the middle tube end cover, it indicates that the inner wiping cloth is over-compressed, which can easily cause the wiping cloth to be damaged and aged.

[0050] Preferably, the middle tube cover, the first flange and the second flange are all provided with alignment grooves 600 to facilitate the alignment and fixation of the cylindrical dust cover, the middle tube and the outer wiping cloth; with the two ends of the handle as 0 o'clock and 6 o'clock, the alignment groove 600 can be opened at 1:30 o'clock.

[0051] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dustproof cleaning cover for plum blossom contacts of a vacuum circuit breaker, characterized in that: include: The middle tube is provided with a middle tube cover plate; the middle tube cover plate has a plurality of through holes evenly distributed along the circumference, and an elastic support tube wall is fixed to the back of the middle tube cover plate, and the elastic support tube wall is opened at one end away from the middle tube cover plate; The cylindrical dust cover is arranged on the outer layer of the elastic support cylinder wall; a guide ring is provided at one end, and a first flange is provided at the other end, and a threaded blind hole is provided on the first flange corresponding to the through hole on the middle cylinder cover plate; the first flange is fixed to the middle cylinder cover plate by bolts; The outer wiping cloth is embedded between the cylindrical dust cover and the elastic supporting cylinder wall; one end of the cloth is provided with a second flange, and the second flange is fixed between the middle cylinder cover and the cylindrical dust cover; and The inner wiping cloth is arranged in the elastic supporting cylinder wall and is fixed relatively to the middle cylinder cover plate.

2. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 1, characterized in that: The elastic supporting cylinder wall is a circumferentially continuous structure or a discontinuous structure.

3. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 2, characterized in that: The middle cylinder cover is provided with a handle, which extends out of the outer peripheral edge of the middle cylinder cover. The length of the handle is greater than the diameter of the static contact barrel of the switch cabinet, forming an anti-fool structure.

4. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 3, characterized in that: The middle tube cover is provided with an anti-lost rope hole on the side.

5. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 4, characterized in that: The front side of the middle tube cover is provided with a cleaning status identification plate and / or a maintenance information slot.

6. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 5, characterized in that: The outer wiping cloth main body is cylindrical.

7. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 6, characterized in that: The inner wiping cloth is a cylindrical structure, with a through hole opened axially in the center of the cylinder and a countersunk hole opened at the end away from the middle cylinder cover. Correspondingly, the middle cylinder cover is provided with a fixing hole, and a through-hole fixing rod is passed through the through hole, and the through-hole fixing rod is fixed to the fixing hole of the middle cylinder cover.

8. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 7, characterized in that: The through-hole fixing rod body is a screw rod, one end of the screw rod is provided with a plum blossom handle made of rubber material, and the other end of the screw rod is provided with a square end portion; correspondingly, the fixing hole of the middle tube cover plate is a threaded through hole; the screw rod is passed through the through hole, the elastic rubber plum blossom handle falls into the countersunk hole, and the square end portion is partially exposed from the middle tube cover plate.

9. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 8, characterized in that: The cylindrical dust cover body is a thin-walled cylindrical structure, and the outer surface of the cylindrical dust cover is sprayed with fluorescent material.

10. The vacuum circuit breaker plum blossom contact dustproof cleaning cover according to claim 9, characterized in that: The middle tube cover plate, the first flange and the second flange are all provided with alignment grooves for alignment.

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