Conductor dust sucking and wiping head and sucking and wiping device for closed type combined electric appliance

Abstract

The utility model relates to the field of maintenance of electrical switch equipment, in particular to a conductor dust sucking and wiping head and a sucking and wiping device for a closed combined electric appliance. The conductor dust sucking and wiping head for the closed type combined electric appliance comprises a dust sucking cover, the cross section of the dust sucking cover is in a C shape, the dust sucking cover comprises an outer side wall, an inner side wall and an end wall connected between the outer side wall and the inner side wall, the outer side wall, the inner side wall and the end wall define a suction cavity together, and an opening in the dust sucking cover forms a conductor inlet and outlet allowing a conductor to enter and exit in the radial direction. A connector used for being connected with a negative pressure suction device is arranged on the outer side wall, a scraping strip used for scraping the conductor in the axial direction of the conductor is installed on the inner side wall, and scattered dust collection holes are formed in the position, on at least one side of the scraping strip, of the inner side wall in the axial direction of the dust collection cover. According to the conductor dust sucking and wiping head and the conductor dust sucking and wiping device for the closed combined electric appliance, the problem that the dust cleaning effect on the conductor of the closed combined electric appliance is poor is solved.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear maintenance, and in particular to a conductor dust suction head and suction device for enclosed combined electrical appliances. Background Technology

[0002] Enclosed switchgear such as GIS and GIL generally use SF6 as the insulation medium, offering numerous advantages including small footprint, high operational reliability, long maintenance cycles, and ease of transportation and installation. They are currently widely used in the power transmission and distribution field. Due to the need for enclosed operation, GIS and GIL switchgear consist of a housing and conductors housed within it, typically conductive rods. The housing provides a sealed environment and requires a pressure of inert gas such as sulfur hexafluoride during operation.

[0003] Because enclosed switchgear such as GIS and GIL have extremely high insulation requirements, the presence of dust, metal particles, etc., remaining inside the casing or on the conductors can seriously affect insulation characteristics, leading to problems such as discharge or partial discharge. Therefore, to ensure that the internal insulation characteristics of the equipment meet the specified requirements after installation, it is necessary to ensure the cleanliness of the space inside the casing, as well as the cleanliness of the conductors (conductive rods) inside the casing. In the electrical switchgear industry, existing 800kV GIS, 1100kV GIS, and GIL products require internal cleaning and inspection after on-site installation.

[0004] Currently, the cleaning of conductors inside enclosed modular electrical appliances is done using general vacuum cleaners. These vacuum cleaners use standard suction tubes with relatively large openings, and the nozzles are held by hand and repeatedly vacuumed along the length of the conductor. While negative pressure suction is obviously an ideal method for cleaning conductors, the large openings of existing vacuum cleaners result in a wide operating range. Besides suctioning dust from the corresponding area on the conductive rod, they also significantly disturb the surrounding airflow. This disturbance leads to the following: dust near the suction opening is stirred up by the airflow disturbance but cannot reach the suction opening, thus remaining dispersed in the surrounding space. After cleaning, these stirred-up but unabsorbed dust particles fall back or adhere to the conductive rod or the inner wall of the casing under the influence of gravity and static electricity, failing to achieve thorough cleaning. This results in low cleaning efficiency for enclosed modular electrical appliances, and the cleaning effect is difficult to achieve the desired result.

[0005] In addition, dust on the conductive rod is often electrostatically adsorbed onto its surface. To remove this electrostatically adsorbed dust, the suction nozzle often needs to have greater suction power. Increased suction power will inevitably lead to increased air turbulence inside the casing, which will cause the following contradiction: when the suction power is insufficient, it is difficult to pick up and collect the dust attached to the conductor; when the suction power is too great, a large amount of dust will be stirred up and cannot be absorbed, thus failing to achieve the expected cleaning effect. Utility Model Content

[0006] The purpose of this invention is to provide a conductor dust suction head for enclosed combined electrical appliances, so as to solve the problem of poor dust removal effect on the conductors of enclosed combined electrical appliances.

[0007] Meanwhile, the purpose of this utility model is also to provide a closed-type conductor dust suction device for combined electrical appliances, which includes a closed-type conductor dust suction head for combined electrical appliances, so as to solve the above-mentioned problems.

[0008] To solve the above problems, the combined cover plate of this utility model adopts the following technical solution:

[0009] A conductor dust suction head for enclosed combined electrical appliances includes a dust suction hood with a C-shaped cross-section. The dust suction hood includes an outer side wall, an inner side wall, and an end wall connecting the outer side wall and the inner side wall. The outer side wall, the inner side wall, and the end wall together form a suction cavity. The opening on the dust suction hood constitutes a conductor inlet and outlet for the conductor to enter and exit radially. The outer side wall is provided with a connector for connecting to a negative pressure suction device. The inner side wall is equipped with a scraper for scraping the conductor along the conductor axis. Along the axial direction of the dust suction hood, the inner side wall is provided with dispersed dust suction holes at at least one side of the scraper.

[0010] Furthermore, the dust cover is an elastic dust cover with an opening smaller than the outer diameter of the adapted conductor.

[0011] Furthermore, the suction holes are arranged circumferentially on the suction hood.

[0012] Furthermore, on the same side of the scraper, the suction holes are arranged in a single row along the axial direction of the suction hood.

[0013] Furthermore, along the axial direction of the dust hood, the dust suction holes are arranged close to the scraper.

[0014] Furthermore, a slot is provided on the inner sidewall, and the scraper is engaged in the slot.

[0015] Furthermore, the cross-section of the card slot is triangular and the slot opening is tapered, and the scraper is provided with an mounting part that matches the shape of the card slot.

[0016] Furthermore, the scraper is located in the middle of the axial direction of the dust collection cover, and the dust collection holes are respectively provided on both sides of the scraper.

[0017] Furthermore, the end wall protrudes radially inward from the corresponding end of the inner sidewall and is lower than the top of the scraper.

[0018] Beneficial Effects: This invention, a closed-type conductor dust suction head for combined electrical appliances, is a pioneering creation. In this invention, the inner wall of the dust hood is provided with discretely distributed suction holes on at least one side of the scraper. This effectively replaces the larger suction inlet of existing technologies by using a suction chamber in conjunction with the suction holes. This allows the suction holes to have a smaller size, reducing the suction power of a single hole and thus reducing its effective range and minimizing the disturbance effect on the surrounding environment. Simultaneously, the scraper on the inner wall of the dust hood compensates for insufficient suction power from the suction holes. During operation, microparticles such as dust adsorbed on the conductor due to static electricity or other factors are scraped off by the scraper. The suction holes only handle weakly adhered microparticles on the conductor or those scraped off by the scraper. Therefore, even with lower suction power, it can still meet cleaning needs and achieve the desired cleaning effect. In summary, the conductor dust suction head for enclosed combined electrical appliances of this invention solves the problem of poor dust removal effect on the conductors of enclosed combined electrical appliances.

[0019] The closed-type combined electrical appliance conductor micro-dust suction device of this utility model adopts the following technical solution:

[0020] A conductor dust removal device for enclosed combined electrical appliances includes a negative pressure suction device connected to a conductor dust removal head for enclosed combined electrical appliances. The conductor dust removal head includes a dust collection hood with a C-shaped cross-section. The dust collection hood includes an outer side wall, an inner side wall, and an end wall connecting the outer side wall and the inner side wall. The outer side wall, inner side wall, and end wall together form a suction cavity. The opening on the dust collection hood constitutes a conductor inlet and outlet for radial entry and exit of the conductor. A connector for connecting to the negative pressure suction device is provided on the outer side wall. A scraper for scraping the conductor along the conductor's axial direction is installed on the inner side wall. Along the axial direction of the dust collection hood, the inner side wall has dispersed dust collection holes at at least one side of the scraper.

[0021] Furthermore, the dust cover is an elastic dust cover with an opening smaller than the outer diameter of the adapted conductor.

[0022] Furthermore, the suction holes are arranged circumferentially on the suction hood.

[0023] Furthermore, on the same side of the scraper, the suction holes are arranged in a single row along the axial direction of the suction hood.

[0024] Furthermore, along the axial direction of the dust hood, the dust suction holes are arranged close to the scraper.

[0025] Furthermore, a slot is provided on the inner sidewall, and the scraper is engaged in the slot.

[0026] Furthermore, the cross-section of the card slot is triangular and the slot opening is tapered, and the scraper is provided with an mounting part that matches the shape of the card slot.

[0027] Furthermore, the scraper is located in the middle of the axial direction of the dust collection cover, and the dust collection holes are respectively provided on both sides of the scraper.

[0028] Furthermore, the end wall protrudes radially inward from the corresponding end of the inner sidewall and is lower than the top of the scraper.

[0029] Beneficial Effects: This invention is an improved version of the enclosed combined electrical appliance conductor dust suction device. In this invention, the inner wall of the dust suction hood in the enclosed combined electrical appliance conductor dust suction head has discretely distributed suction holes on at least one side of the scraper. This is equivalent to replacing the larger suction port in the prior art by using a suction chamber in conjunction with the suction holes. This allows the suction holes to have a smaller size, reducing the suction power of a single suction hole, thereby reducing its effective range and weakening the disturbance effect on the surrounding environment. At the same time, by setting a scraper on the inner wall of the dust suction hood, the problem of insufficient suction power of the suction holes can be compensated. During operation, micro-dust particles adsorbed on the conductor due to static electricity and other factors can be scraped off the conductor by the scraper. The function of the suction holes is only to process micro-dust with weak adhesion on the conductor or micro-dust scraped off by the scraper. Therefore, even with a smaller suction power, it can still meet the cleaning needs and achieve the desired cleaning effect. In summary, the conductor dust removal device for enclosed combined electrical appliances of this invention solves the problem of poor dust removal effect on the conductors of enclosed combined electrical appliances. Attached Figure Description

[0030] Figure 1 This is a perspective view of one embodiment of the conductive micro-dust suction head for enclosed combined electrical appliances of this utility model;

[0031] Figure 2 yes Figure 1 A cross-sectional view of a conductive dust suction head for enclosed combined electrical appliances.

[0032] In the diagram: 1. Outer wall; 2. Joint; 3. Inner edge; 4. Scraper; 5. End wall; 6. Dust extraction hole; 7. Slot; 8. First sealing plate; 9. Second sealing plate. Detailed Implementation

[0033] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0034] Negative pressure suction, as a typical dust removal method, works by creating an instantaneous vacuum at the suction port. The surrounding air, under the pressure difference, brushes away the dust from the object's surface, carrying the dust away from the object and collecting and processing it with the airflow. Therefore, the suction port must have a certain suction power. Thus, one of the important indicators for measuring the performance of a vacuum cleaner in existing technology is the speed of the motor, as the motor speed directly determines the wind speed and air volume at the suction port.

[0035] When cleaning enclosed combined electrical appliances such as GIS and GIL, the strong suction of the dust inlet results in a large effective range, causing significant disturbance to the surrounding airflow. This disturbance causes dust and other particles near the dust inlet to be lifted up but unable to reach the inlet, thus remaining scattered in the surrounding space. After cleaning, these lifted but unabsorbed dust particles fall back down or adhere to the conductive rod or the inner wall of the casing under the influence of gravity or static electricity, preventing the combined electrical appliances from meeting insulation requirements.

[0036] Therefore, the closed-type combined electrical appliance conductor dust suction head of this utility model can be used in conjunction with a negative pressure suction device. It is connected to the dust suction port of the negative pressure suction device to reduce the disturbance of the surrounding air at the dust suction port. At the same time, it separates the dust from the dust by scraping, and then absorbs the dust with a small suction force. Meanwhile, it controls the dispersion range of the dust, thereby achieving a better dust removal effect and a more thorough dust removal.

[0037] Based on the above inventive concept, the basic implementation of the enclosed combined electrical appliance conductive micro-dust suction head of this utility model is as follows:

[0038] like Figure 1 , 2As shown, in the basic implementation, the enclosed combination appliance conductor dust suction head includes a dust suction hood. The function of the dust suction hood is to limit the dust suction range and control the dispersion range of the raised dust, thereby promoting the complete collection of the raised dust. In addition, the dust suction hood also serves as a carrier for the suction port 6. In a typical structure, the dust suction hood includes an outer side wall 1, an inner side wall, and an end wall 5 connecting the outer side wall 1 and the inner side wall. The outer side wall 1, the inner side wall, and the end wall 5 together form a suction chamber. In order to facilitate the cleaning of the conductor, the cross-section of the dust suction hood is C-shaped, and the opening on the dust suction hood, that is, the opening of the "C" mentioned above, constitutes a conductor inlet and outlet for the conductor to enter and exit radially. A connector 2 for connecting to a negative pressure suction device is provided on the outer side wall 1 of the dust suction hood. When the connector 2 is connected to the negative pressure suction device, a negative pressure will be formed in the suction chamber of the dust suction hood. A scraper 4 is installed on the inner wall of the dust collection hood for scraping the conductor along its axial direction. The scraper 4 scrapes the surface of the conductor as the dust collection hood moves relative to the conductor along its axial direction, separating dust particles adhering to the conductor surface due to static electricity or friction. Dispersed suction holes 6 are arranged on at least one side of the scraper 4 along the axial direction of the dust collection hood. As mentioned earlier, the scraper 4 promotes the separation of dust particles from the conductor surface. The separated dust particles are confined to a limited range by the dust collection hood and float, losing the conductor's holding force and becoming easier to absorb. Therefore, although the dispersed suction holes 6 will inevitably be smaller and the suction power will be reduced, they are still sufficient to absorb the dust particles.

[0039] Based on the above basic implementation method, as a preferred implementation method, the dust hood is an elastic dust hood with an opening smaller than the outer diameter of the adapted conductor. When the dust hood is elastic, it can be made of materials such as rubber. The smaller opening than the outer diameter of the adapted conductor will not affect the conductor's entry and exit. Moreover, this structure will generate a larger effective area in the circumferential direction of the conductor, achieving a better dust collection effect. It should be noted that although the dust hood is set as an elastic dust hood in the preferred implementation method, in some implementation methods, the dust hood can also be a rigid hood. In this case, it is only necessary to ensure that its opening is not smaller than the outer diameter of the adapted conductor; or the dust hood can be set as a split structure, for example, dividing it into two parts along the circumference, with the two parts hinged together and a torsion spring used to make them hold each other tightly. In this case, the usage requirements can also be met.

[0040] Based on the above embodiments, as a preferred embodiment, the suction holes 6 are arranged circumferentially on the suction hood. This structure allows for omnidirectional dust collection of the conductor along the circumference of the suction hood, thus better preventing dust escape. Furthermore, the suction holes can be arranged in a single row on the same side of the scraper 4 along the axial direction of the suction hood. This single-row arrangement aims to minimize the number of suction holes while meeting suction requirements, thus minimizing the impact on airflow in the surrounding space. When using the single-row arrangement, the suction holes 6 are positioned close to the scraper along the axial direction of the suction hood. This is to keep the suction holes as far away as possible from their respective ports on the suction hood, further reducing the impact on airflow outside the suction hood.

[0041] As one of the core components of the enclosed combined electrical appliance conductive micro-dust suction head of this utility model, the scraper 4 is designed to be replaceable considering its wear during operation. Specifically, in a preferred embodiment, a slot 7 is provided on the inner side wall of the dust collection hood, and the scraper 4 is installed in the slot 7 in a snap-fit ​​manner. More specifically, the slot 7 has a triangular cross-section and a constricted opening, and the scraper 4 has an installation part that matches the shape of the slot 7. In other words, the slot 7 adopts a structure similar to a dovetail groove, and the scraper 4 is installed in the slot 7 by cooperating with the dovetail groove. During installation, the scraper can be pushed into the slot 7 along the extension direction of the slot 7, and during disassembly, the scraper 4 to be replaced can be pulled out along the extension direction of the slot 7.

[0042] As mentioned earlier, the scraper 4 is designed to be detachable to facilitate replacement. In other embodiments, when the entire conductor micro-dust suction head for the enclosed combined electrical appliance of this utility model is a disposable product, the scraper 4 can also be integrated with the inner wall. When the scraper 4 is replaceable, a combination of screws and pressure plates can be used to fix the scraper to the inner wall, or the scraper can be glued to the inner wall.

[0043] Based on the above embodiments, the scraper 4 is located in the middle of the dust collection hood along its axial direction, and the dust collection holes 6 are respectively provided on both sides of the scraper 4. This is to ensure that the dust collection hood can perform wiping and dust collection operations during its axial reciprocating motion. Of course, if only unidirectional operation is required, the scraper can also be located at one end of the dust collection hood along its axial direction, and the dust collection holes 6 can be provided only on one side.

[0044] As another preferred embodiment, based on the above embodiments, the end wall 5 protrudes radially inward from the corresponding end of the inner sidewall and is lower than the top of the scraper. This is to reduce the gap between the two ends of the dust hood and the conductor, and to better form a space that is as airtight as possible, preventing dust from escaping from the ends of the dust hood during operation. Based on this structure, a first sealing plate 8 and a second sealing plate 9 can be respectively provided at the two ends near the opening on the outer sidewall or the inner sidewall to better form an airtight space.

[0045] Implementation method of the conductive micro-dust suction device for enclosed combined electrical appliances of this utility model:

[0046] The present invention relates to a closed-type combined electrical appliance conductor micro-dust suction device, which includes a negative pressure suction device connected to a closed-type combined electrical appliance conductor micro-dust suction head. The structure of the negative pressure suction device is prior art, and the structure of the closed-type combined electrical appliance conductor micro-dust suction head has been described in detail above and will not be repeated here.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A conductive micro-dust suction head for enclosed combined electrical appliances, characterized in that, The device includes a dust collection hood with a C-shaped cross-section. The dust collection hood includes an outer side wall, an inner side wall, and an end wall connecting the outer side wall and the inner side wall. The outer side wall, the inner side wall, and the end wall together form a suction cavity. The opening on the dust collection hood constitutes a conductor inlet and outlet for the conductor to enter and exit radially. The outer side wall is provided with a connector for connecting to a negative pressure suction device. The inner side wall is equipped with a scraper for scraping the conductor along the conductor axis. Along the axial direction of the dust collection hood, the inner side wall is provided with dispersed dust collection holes at at least one side of the scraper.

2. The conductor dust suction head for enclosed combined electrical appliances according to claim 1, characterized in that, The dust hood is an elastic dust hood, and its opening is smaller than the outer diameter of the adapted conductor.

3. The conductor dust suction head for enclosed combined electrical appliances according to claim 1 or 2, characterized in that, The suction holes are arranged circumferentially on the suction hood.

4. The conductor dust suction head for enclosed combined electrical appliances according to claim 3, characterized in that, On the same side of the scraper, the suction holes are arranged in a single row along the axial direction of the suction hood.

5. The conductor dust suction head for enclosed combined electrical appliances according to claim 4, characterized in that, Along the axial direction of the dust hood, the dust suction holes are arranged close to the scraper.

6. The conductor dust suction head for enclosed combined electrical appliances according to claim 1 or 2, characterized in that, A slot is provided on the inner sidewall, and the scraper is fitted into the slot.

7. The conductor dust suction head for enclosed combined electrical appliances according to claim 6, characterized in that, The card slot has a triangular cross-section and the opening is tapered. The scraper has an mounting part that matches the shape of the card slot.

8. The conductor dust suction head for enclosed combined electrical appliances according to claim 1 or 2, characterized in that, The scraper is located in the middle of the axial direction of the dust collection cover, and the dust collection holes are respectively provided on both sides of the scraper.

9. The conductor dust suction head for enclosed combined electrical appliances according to claim 1 or 2, characterized in that, The end wall protrudes radially inward from the corresponding end of the inner sidewall and is lower than the top of the scraper.

10. A conductive micro-dust suction device for enclosed combined electrical appliances, comprising a negative pressure suction device, characterized in that, The negative pressure suction device is connected to a conductor micro-dust suction head for enclosed combined electrical appliances as described in any one of claims 1-9.

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