Active particle capture device and housing assembly of power transmission equipment

Abstract

The present invention provides an active particle capture device and a shell component of a power transmission device. The active particle capture device includes a trap cover plate, a connection structure for fixedly connecting with the side wall opening of the shell of the power transmission device is provided on the trap cover plate, and the trap cover plate has a capture cavity for capturing metal particles in the shell; the active particle capture device also includes a magnetic suction piece installed on the trap cover plate and located in the capture cavity, and the magnetic suction piece is used to actively absorb metal particles into the capture cavity through the generated magnetic field. The active particle capture device of the present invention has a simple structure, can be flexibly arranged according to needs, has low requirements on the product structure size, makes up for the shortcomings of conventional particle capture traps, can effectively capture most of the metal foreign matter inside the device shell, greatly reduces the risk of foreign matter discharge, avoids causing major economic losses, and can create huge economic and social benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of AC and DC high voltage power transmission and transformation equipment, and in particular to an active particle capture device and a shell component of a power transmission equipment. Background Art

[0002] Gas Insulated Metal-enclosed Switchgear (GIS), Gas Insulated Transmission Line (GIL), DC transmission equipment (DC GIS, DC wall bushing, etc.) and other equipment will produce metal particle pollutants during the production, assembly, transportation, and operation stages due to the inevitable friction and collision between internal sliding parts, equipment vibration, and thermal expansion and contraction friction. The internal metal particles will bounce violently under the action of the electric field force, and the overall movement trend of the metal particles is from the high electric field area to the low electric field area. The local electric field distortion generated by the metal particles will seriously reduce the insulation performance of SF6, reduce the insulation level of the product, and threaten the safety of the system.

[0003] In this regard, in order to reduce the impact of metal particles on the operational reliability of the product, a particle capture trap is usually set inside the product. The principle of conventional particle capture is to add a pull-out on the shell (for example, the particle trap and GIS / GIL cylindrical structure disclosed in the Chinese invention patent application with application publication number CN111957674A) or a coaxial metal grid (for example, a particle capture structure and a high-voltage conductor insulation support structure disclosed in the Chinese invention patent application with application publication number CN110661220A) to construct a low electric field area, so that the particles can enter the pits in the low electric field area from the high electric field area under the action of the electric field force, thereby achieving the particle capture effect. The conventional particle capture method has the following shortcomings:

[0004] (1) When a pull-out hole is added to the shell to construct a low electric field area, the electric field value of the edge transition area where the pull-out hole connects to the main shell is higher than that of the main shell surface and the inside of the pull-out hole. This prevents the particles from entering the pit. The particles that enter the pit mainly fall into the pit due to bouncing or collision, and the effect of particle capture is greatly reduced. Experiments show that the low electric field area constructed by adding a coaxial metal grid inside the shell cannot completely capture the set metal particles, and the capture effect is general.

[0005] (2) The metal particles inside the shell of the DC transmission equipment are subject to the electric field force in a constant direction, and the intensity of their movement is lower than that of the AC transmission equipment. Fewer particles enter the pit by bouncing, and the particle capture effect is lower. Summary of the invention

[0006] The object of the present invention is to provide an active particle capture device to solve the problem of poor capture effect of existing particle traps; the object of the present invention is also to provide a shell assembly of power transmission equipment to solve the problem of poor capture effect of particle traps of existing shell assemblies.

[0007] To achieve the above objectives, the active particle capture device of the present invention adopts the following technical solutions:

[0008] The active particle capture device includes a trap cover plate, on which a connection structure for fixed connection with a side wall opening of a shell of a power transmission device is provided, and the trap cover plate has a capture cavity for capturing metal particles in the shell; the active particle capture device also includes a magnetic attraction component installed on the trap cover plate and located in the capture cavity, and the magnetic attraction component is used to actively adsorb metal particles into the capture cavity by generating a magnetic field.

[0009] The beneficial effects of the above technical solution are: the connection structure on the trap cover facilitates the fixed connection between the trap cover and the side wall opening of the shell, and the trap cover has a capture cavity, which is convenient for capturing metal particles in the shell; in addition, the present invention also includes a magnetic suction component installed on the trap cover and located in the capture cavity, and the magnetic suction component can generate a magnetic field, so that the metal particles can be actively adsorbed into the capture cavity through the generated magnetic field. In this way, the particle capture efficiency is high, the effect is good, and it is more thorough, which solves the problem of poor effect of existing passive particle capture.

[0010] Furthermore, the trap cover includes a cylinder and a cover fixed to one end of the cylinder, the capture cavity is surrounded by the cylinder and the cover, the magnetic element is installed on the cover, and the connecting structure is arranged at the other end of the cylinder.

[0011] The beneficial effect of the above technical solution is that the trap cover is arranged separately, which is convenient for processing and manufacturing, and also convenient for the installation of the magnetic suction part and the setting of the connection structure.

[0012] Furthermore, the magnetic attraction member is an electromagnet, which includes an iron core fixed on the cover plate and a coil wound around the outside of the iron core.

[0013] The beneficial effect of the above technical solution is that: by using an electromagnet as a magnetic attraction member, a magnetic field can be generated after the coil is energized. The parameters of the coil and the energizing current can be designed as needed to control the size of the generated magnetic field, making it more convenient to use.

[0014] Furthermore, the cover is an insulating cover, on which two terminals are integrally cast and embedded, one end of the two terminals extends into the cylinder and is connected to the two ends of the coil, and the other end of the two terminals is used to connect to external power-carrying equipment.

[0015] The beneficial effect of the above technical solution is that an insulating cover is used, and two terminal posts are integrally cast and embedded on the insulating cover, which facilitates the wiring of the coil and the power supply to the coil. Compared with opening a wire hole on the insulating cover alone, the integrally cast and embedded terminal posts can ensure sealing and ensure the insulation performance of the power transmission equipment.

[0016] Furthermore, the iron core is a U-shaped iron core, which includes two side arms and a connecting arm connected to one end of the two side arms, the coil is wound around the two side arms, and the connecting arm is fixed on the insulating cover plate.

[0017] The beneficial effect of the above technical solution is that it facilitates the fixing of the iron core and the winding of the coil.

[0018] Furthermore, the connecting arm is bonded and fixed on the insulating cover plate.

[0019] The beneficial effect of the above technical solution is that the fixing method is simple and reliable.

[0020] Furthermore, the connection structure includes an outwardly turned edge arranged at the end of the cylinder and extending outwardly, and a screw through hole arranged on the outwardly turned edge.

[0021] The beneficial effects of the above technical solution are: the connection structure is simple, and the manufacture and installation of the cylinder are convenient.

[0022] In order to achieve the above-mentioned purpose, the housing assembly of the power transmission equipment in the present invention adopts the following technical solution:

[0023] The shell component of the power transmission equipment includes a shell and an active particle capture device installed at the side wall opening of the shell, the active particle capture device includes a trap cover plate, the trap cover plate is provided with a connection structure fixedly connected to the side wall opening, the trap cover plate has a capture cavity for capturing metal particles in the shell; the active particle capture device also includes a magnetic attraction component installed on the trap cover plate and located in the capture cavity, the magnetic attraction component is used to actively adsorb metal particles into the capture cavity by generating a magnetic field.

[0024] The beneficial effects of the above technical solution are: the connection structure on the trap cover facilitates the fixed connection between the trap cover and the side wall opening of the shell, and the trap cover has a capture cavity, which is convenient for capturing metal particles in the shell; in addition, the present invention also includes a magnetic suction component installed on the trap cover and located in the capture cavity, and the magnetic suction component can generate a magnetic field, so that the metal particles can be actively adsorbed into the capture cavity through the generated magnetic field. In this way, the particle capture efficiency is high, the effect is good, and it is more thorough, which solves the problem of poor effect of existing passive particle capture.

[0025] Furthermore, the trap cover includes a cylinder and a cover fixed to one end of the cylinder, the capture cavity is surrounded by the cylinder and the cover, the magnetic element is installed on the cover, and the connecting structure is arranged at the other end of the cylinder.

[0026] The beneficial effect of the above technical solution is that the trap cover is arranged separately, which is convenient for processing and manufacturing, and also convenient for the installation of the magnetic suction part and the setting of the connection structure.

[0027] Furthermore, the magnetic attraction member is an electromagnet, which includes an iron core fixed on the cover plate and a coil wound around the outside of the iron core.

[0028] The beneficial effect of the above technical solution is that: by using an electromagnet as a magnetic attraction member, a magnetic field can be generated after the coil is energized. The parameters of the coil and the energizing current can be designed as needed to control the size of the generated magnetic field, making it more convenient to use.

[0029] Furthermore, the cover is an insulating cover, on which two terminals are integrally cast and embedded, one end of the two terminals extends into the cylinder and is connected to the two ends of the coil, and the other end of the two terminals is used to connect to external power-carrying equipment.

[0030] The beneficial effect of the above technical solution is that an insulating cover is used, and two terminal posts are integrally cast and embedded on the insulating cover, which facilitates the wiring of the coil and the power supply to the coil. Compared with opening a wire hole on the insulating cover alone, the integrally cast and embedded terminal posts can ensure sealing and ensure the insulation performance of the power transmission equipment.

[0031] Furthermore, the iron core is a U-shaped iron core, which includes two side arms and a connecting arm connected to one end of the two side arms, the coil is wound around the two side arms, and the connecting arm is fixed on the insulating cover plate.

[0032] The beneficial effect of the above technical solution is that it facilitates the fixing of the iron core and the winding of the coil.

[0033] Furthermore, the connecting arm is bonded and fixed on the insulating cover plate.

[0034] The beneficial effect of the above technical solution is that the fixing method is simple and reliable.

[0035] Furthermore, the connection structure includes an outwardly turned edge arranged at the end of the cylinder and extending outwardly, and a screw through hole arranged on the outwardly turned edge.

[0036] The beneficial effects of the above technical solution are: the connection structure is simple, and the manufacture and installation of the cylinder are convenient.

[0037] Furthermore, the magnetic attraction member does not protrude from the inner wall surface of the shell.

[0038] The beneficial effect of the above technical solution is to avoid affecting other components in the housing.

[0039] Further, the side wall opening is arranged at the bottom of the shell.

[0040] The beneficial effect of the above technical solution is that it facilitates some metal particles to directly fall into the capture cavity after bouncing or colliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural diagram of embodiment 1 of the housing assembly of the power transmission equipment in the present invention;

[0042] Figure 2 for Figure 1 A magnified view of the active particle capture device in the middle;

[0043] Figure 3 for Figure 2 The structure diagram of the middle coil;

[0044] Figure 4 for Figure 2 The structural diagram of the middle iron core;

[0045] Figure 5 for Figure 1 and Figure 2 Structural diagram of the middle insulation cover;

[0046] Figure 6 This is a structural diagram of embodiment 2 of the housing assembly of the power transmission equipment in the present invention.

[0047] In the figure: 1. Shell; 2. Moving contact seat; 3. Static contact seat; 4. Cylinder; 4-1. Outward turning edge; 4-2. Inward turning edge; 5. Insulating cover; 5-1. Terminal; 5-2. Mounting hole; 5-3. Sealing ring groove; 6. Screw; 7. Electromagnet; 7-1. Iron core; 7-2. Coil; 8. Conductive rod; 9. Electrical connection structure. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0050] It should be noted that relational terms such as "first" and "second" that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by a sentence such as "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

[0051] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0052] Embodiment 1 of the housing assembly of the power transmission device of the present invention is as follows Figure 1 As shown, it includes a shell 1 and an active particle capture device installed on the shell 1. A moving contact seat 2 and a static contact seat 3 are arranged in the shell 1. A break is formed between the moving contact seat 2 and the static contact seat 3. The break can be a circuit breaker break, a disconnector break or a grounding switch break of an AC power transmission GIS device. A side wall opening is arranged on the side wall of the shell 1. The side wall opening in this embodiment is a pull-out 1-1 integrally arranged at the bottom of the side wall of the shell 1. The pull-out 1-1 is located directly below the break. Among them, combined with Figure 1 and Figure 2 As shown, the straight line segments inside the opening 1-1 and the side wall of the shell 1 are low electric field areas D, and the arc segments of the opening 1-1 are high electric field areas G with electric field values ​​higher than the straight line segments of the side wall of the shell 1 and the inside of the opening 1-1.

[0053] The active particle capture device is located directly below the fracture, and includes a trap cover fixed on the pull-out 1-1, so the trap cover is provided with a connection structure fixedly connected to the pull-out 1-1, and the trap cover also has a capture cavity for capturing metal particles in the housing 1. Specifically, Figure 1 As shown, the trap cover in this embodiment includes a cylinder 4 and a cover fixed to the lower end of the cylinder 4, the cover is an insulating cover 5, the capture chamber is surrounded by the cylinder 4 and the insulating cover 5, and the connection structure is arranged at the upper end of the cylinder 4.

[0054] Specific as Figure 2As shown, the barrel 4 is fixed to the draw port 1-1 by screws 6, and the connection structure includes an outward-turned edge 4-1 that fits the end surface of the draw port 1-1 and a screw through hole provided on the outward-turned edge 4-1 for the screw 6 to pass through. To ensure sealing, a sealing ring (not marked in the figure) is provided between the outward-turned edge 4-1 and the end surface of the draw port 1-1, and therefore a sealing ring installation groove is also provided on the outward-turned edge 4-1.

[0055] The cylinder 4 and the insulating cover plate 5 are also fixedly connected by screws (not shown in the figure), so an inverted edge 4-2 is provided at the lower end of the cylinder 4, and a threaded hole is provided on the inverted edge 4-2. Figure 5 As shown, the upper end of the insulating cover plate 5 is provided with a ring flange, and the ring flange is provided with a mounting hole 5-2 for screws to pass through. In addition, a sealing ring (not shown in the figure) is also provided between the cylinder 4 and the insulating cover plate 5, so a sealing ring groove 5-3 is provided on the upper end surface of the insulating cover plate 5.

[0056] The active particle capture device also includes a magnetic attraction member mounted on the trap cover, such as Figure 1 As shown, the magnetic attraction member in this embodiment is an electromagnet 7, specifically as Figure 2 As shown, the electromagnet 7 is mounted on the insulating cover plate 5, and the electromagnet 7 includes an iron core 7-1 fixed on the insulating cover plate 5 and a coil 7-2 wound around the outside of the iron core 7-1. Figure 4 As shown, the core 7-1 is a U-shaped core, including two side arms and a connecting arm connected to one end of the two side arms, Figure 3 As shown, the coil 7 - 2 is wound around two side arms, and the connecting arms are bonded and fixed to the insulating cover plate 5 .

[0057] In addition, if Figure 2 and Figure 5 As shown, two terminals 5-1 are integrally cast and embedded on the insulating cover plate 5. The upper ends of the two terminals 5-1 extend into the interior of the cylinder 4 and are connected to the two ends of the coil 7-2. The lower ends of the two terminals 5-1 extend out of the insulating cover plate 5 and are used to connect to external power-on equipment to energize the coil 7-2. This structure facilitates the wiring of the coil 7-2 and facilitates the energization of the coil 7-2. Compared with the case of opening a wire hole on the insulating cover plate 5 alone, the integrally cast and embedded terminals 5-1 can ensure the sealing and insulation performance of the power transmission equipment.

[0058] like Figure 1 and Figure 2 As shown, the electromagnet 7 is located in the capture chamber and does not protrude from the inner wall of the housing 1 to avoid affecting other components in the housing 1. When in use, the coil 7-2 is energized to magnetize the iron core 7-1, and the generated magnetic field can actively adsorb metal particles into the capture chamber. In this way, the particle capture efficiency is high, the effect is good, and it is more thorough, which solves the problem of poor effect of existing passive particle capture.

[0059] The active particle capture device in the present invention has a simple structure, can be flexibly arranged according to needs, and has low requirements on the product structure size. Starting from the equipment's aging test, before, during and after the aging test, the electromagnet is energized to generate a strong magnetic field, actively capturing stationary and moving metal particles into the trap, making up for the defects of conventional particle capture traps and achieving active particle capture. In addition, during the operation of the equipment or after a period of operation, the electromagnet can be energized regularly to effectively solve the problem of particle capture inside the equipment.

[0060] The active particle capture device of the present invention makes up for the shortcomings of conventional particle capture traps, can effectively capture most of the metal foreign matter inside the device housing, greatly reduces the risk of foreign matter discharge, avoids causing major economic losses, and can create huge economic and social benefits.

[0061] Embodiment 2 of the housing assembly of the power transmission device of the present invention is as follows Figure 6 As shown, different from Example 1, the power transmission equipment in this embodiment is a GIL device or a long busbar, and a conductive rod 8 and an electrical connection structure 9 plugged with the conductive rod 8 are installed in the shell, and a conductive rod plug-in structure is formed between the two. The active particle capture device is located directly below the conductive rod plug-in structure, and can actively capture metal particles generated by the movement and wear of the conductive rod 8. The specific structure of the active particle capture device is the same as that of Example 1.

[0062] In other embodiments of the housing assembly of the power transmission equipment: the power transmission equipment may also be a GIS device for direct current transmission or a direct current wall bushing device.

[0063] In other embodiments of the housing assembly of the power transmission device: the side wall opening on the housing side wall can also be a cut made on the housing side wall, and then a fixing ring is welded on the cut, and the inner hole of the fixing ring constitutes the side wall opening.

[0064] In other embodiments of the housing assembly of the power transmission device: the side wall opening of the housing may not be at the bottom, but at the front side or the rear side of the housing.

[0065] In other embodiments of the housing assembly of the power transmission equipment: a permanent magnet can be used as a magnetic attraction member to replace the electromagnet, so that no power is required during use, and the magnetic field generated by the permanent magnet is used to actively adsorb the metal particles into the capture cavity; of course, both a permanent magnet and an electromagnet can be provided, and the magnetic field generated by the permanent magnet is used to adsorb the metal particles in the initial stage of use. When the magnetism of the permanent magnet weakens, the electromagnet is energized to continue to generate a magnetic field to adsorb the metal particles.

[0066] In other embodiments of the housing assembly of the power transmission device: the magnetic attraction member may also be aligned with the inner wall surface of the housing.

[0067] In other embodiments of the housing assembly of the power transmission device: the connecting arms of the U-shaped core can also be fixed to the insulating cover plate by bolts.

[0068] In other embodiments of the housing assembly of the power transmission device: the core may also be in a horseshoe shape or a bar shape.

[0069] In other embodiments of the housing assembly of the power transmission equipment: the cover plate may not be an insulating cover plate, but a metal cover plate. In this case, a wire hole needs to be provided on the metal cover plate, and insulation and sealing measures need to be taken, such as installing an insulating sealing joint.

[0070] In other embodiments of the housing assembly of the power transmission device: the trap cover plate may be integral, including an integrally connected cylinder body and a cylinder bottom, and the magnetic attraction member is mounted on the cylinder bottom wall.

[0071] In other embodiments of the housing assembly of the power transmission device: when the trap cover is an integrated type, a spherical recess may also be provided on the trap cover, and the inner cavity of the spherical recess constitutes a capture cavity.

[0072] In other embodiments of the housing assembly of the power transmission device: the trap cover can also be snap-fitted and fixed to the side wall opening, in which case the connection structure is a buckle; or the trap cover can also be welded and fixed to the side wall opening, in which case the connection structure is a welding surface.

[0073] The embodiment of the active particle capture device in the present invention is as follows: The specific structure of the active particle capture device is the same as the active particle capture device in the housing assembly embodiment of the power transmission device described above, and will not be repeated here.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An active particle capture device, characterized in that: The invention comprises a trap cover plate, on which a connection structure for being fixedly connected to the side wall opening of the shell of the power transmission equipment is arranged, and the trap cover plate has a capture cavity for capturing metal particles in the shell, and the trap cover plate comprises a cover plate; the active particle capturing device also comprises a magnetic attraction component mounted on the trap cover plate and located in the capture cavity, and the magnetic attraction component is an electromagnet, and the electromagnet comprises an iron core fixed on the cover plate and a coil wound around the outside of the iron core, and one end of the iron core facing the inner side of the shell of the power transmission equipment is located at the side wall opening, and the magnetic attraction component is used to actively adsorb the metal particles into the capture cavity by generating a magnetic field.

2. The active particle capture device according to claim 1, characterized in that: The trap cover comprises a cylinder and a cover fixed at one end of the cylinder, the capture cavity is surrounded by the cylinder and the cover, the magnetic attraction piece is installed on the cover, and the connection structure is arranged at the other end of the cylinder.

3. The active particle capture device according to claim 2, characterized in that: The iron core is a U-shaped iron core, which includes two side arms and a connecting arm connected to one end of the two side arms. The coil is wound around the two side arms, and the connecting arm is fixed on the cover plate.

4. The active particle capture device according to claim 2, characterized in that: The cover is an insulating cover, on which two terminals are integrally cast and embedded. One end of the two terminals extends into the cylinder and is connected to the two ends of the coil, and the other end of the two terminals is used to connect to external power-carrying equipment.

5. The active particle capture device according to claim 4, characterized in that: The iron core is a U-shaped iron core, which includes two side arms and a connecting arm connected to one end of the two side arms. The coil is wound around the two side arms, and the connecting arm is fixed on the insulating cover plate.

6. The active particle capture device according to claim 5, characterized in that: The connecting arm is bonded and fixed on the insulating cover plate.

7. The active particle capture device according to any one of claims 2 to 6, characterized in that: The connection structure comprises an outwardly turned edge which is arranged at the end of the cylinder and extends outwardly, and a screw through hole which is arranged on the outwardly turned edge.

8. A housing assembly for a power transmission device, comprising a housing and an active particle capture device installed at an opening of a side wall of the housing, characterized in that: The active particle capture device is the same as the active particle capture device described in any one of claims 1 to 7.

9. The housing assembly of the power transmission device according to claim 8, characterized in that: The magnetic attraction member does not protrude from the inner wall surface of the shell.

10. The housing assembly of the power transmission device according to claim 8, characterized in that: The side wall opening is arranged at the bottom of the housing.

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