Cascade type medium-voltage frequency conversion cabinet adopting tenon-and-mortise installation technology

Abstract

The utility model discloses a cascade type medium-voltage frequency conversion cabinet adopting a mortise and tenon joint installation technology. The cabinet comprises a frame, door plates arranged at the front end and the rear end of the frame, a top cover arranged at the top of the frame, a base arranged at the bottom of the frame, epoxy resin plates arranged at the left end and the right end of the frame, and a glass fiber reinforced plastic assembly arranged in the frame. A plurality of current transformers are arranged in the frame; a fan is arranged above the top cover; the plurality of power units are arranged on the laminates of the glass fiber reinforced plastic assembly; the series connection lines among the plurality of power units pass through the current transformer. According to the utility model, the floating installation of the product is realized through the glass fiber reinforced plastic component without being interfered by the potential of a nearby conductor; the mortise and tenon mounting structure and process are adopted, the use frequency of bolts is reduced as much as possible, and meanwhile the reliability of equipment in all directions is guaranteed; the reliability of ventilation and heat dissipation of the product is ensured through the optimal design of the air duct; and meanwhile, the product also has multiple functions of wire passing protection, dust prevention, intrinsic safety realization and the like.

Description

Technical Field

[0001] The utility model belongs to the field of artificial lifting, and specifically relates to a cascade medium-voltage frequency conversion cabinet adopting a mortise and tenon installation process. Background Art

[0002] In the artificial lift industry, a frequency conversion control cabinet is generally used to drive a submersible oil pump. The frequency conversion control cabinet is divided into low-voltage products and cascaded medium-voltage frequency conversion cabinets. The cascaded medium-voltage frequency conversion cabinet uses 690V power units in series to form high voltage. Due to the cascade installation, the equipment increases from 0V to 6kV or 10kV from left to right. How to prevent the equipment from being affected by the potential of surrounding equipment and ensure reliable ventilation and heat dissipation of the product has become an urgent problem to be solved. Utility Model Content

[0003] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a cascade medium-voltage frequency conversion cabinet adopting the mortise and tenon installation process.

[0004] The utility model is realized through the following technical solutions:

[0005] A cascaded medium-voltage frequency conversion cabinet adopting a mortise and tenon installation process comprises a frame, door panels arranged at the front and rear ends of the frame, a top cover arranged at the top of the frame, a base arranged at the bottom of the frame, epoxy resin plates arranged at the left and right ends of the frame, and a glass fiber reinforced plastic component arranged inside the frame; a plurality of current transformers are arranged inside the frame; a fan is arranged above the top cover; a plurality of power units are arranged on the layer plates of the glass fiber reinforced plastic component; and the series wiring between the plurality of power units passes through the current transformer.

[0006] In the above technical solution, the frame adopts a hot-dip galvanized or aluminum-zinc coated structure.

[0007] In the above technical solution, the door panel includes at least one single door panel, and the single door panel is hingedly connected to the frame.

[0008] In the above technical solution, at least one ventilation grille is arranged on the single door panel.

[0009] In the above technical solution, filter cotton is arranged inside the ventilation grille.

[0010] In the above technical solution, a locking bolt is arranged on the door panel, and a locking nut is arranged on the frame, and after the door panel is closed, the locking bolt and the locking nut on the door panel correspond to each other.

[0011] In the above technical solution, a plurality of wire guard rings distributed vertically are arranged on the epoxy resin board.

[0012] In the above technical solution, the fiberglass reinforced plastic assembly includes four columns and a plurality of layer plates arranged at four corners, and the four corners of the layer plates are connected to the columns; the layer plates are composed of a plurality of layer plates connected by mortise and tenon joints.

[0013] In the above technical solution, the fiberglass assembly also includes a reinforcing column, which is arranged between two columns in the long direction and fixedly connected to each layer plate; a guard plate is arranged on the side of the top layer plate close to the reinforcing column.

[0014] In the above technical solution, the number of the current transformers is consistent with the number of layers of the FRP assembly, and the series wires of the power units on each layer pass through the current transformers located at the same horizontal height.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a cascaded medium-voltage frequency conversion cabinet adopting the mortise and tenon installation process. Through the glass fiber reinforced plastic components, the floating installation of the product is realized, and it is not disturbed by the potential of the nearby conductor; the mortise and tenon installation structure and process are adopted to reduce the frequency of use of bolts as much as possible, while ensuring the reliability of the equipment in all directions; through the optimized design of the air duct, the reliability of ventilation and heat dissipation of the product is guaranteed; at the same time, the product also has multiple functions such as over-line protection, dust prevention, and realization of intrinsic safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model after the front door panel is removed;

[0019] Figure 3 It is a structural schematic diagram of the glass fiber reinforced plastic component in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the middle plate of the utility model.

[0021] in:

[0022] 1. Frame; 2. Door panel; 3. Ventilation grille; 4. Top cover; 5. Fan; 6. Epoxy resin board; 7. Wire guard ring; 8. Locking bolt; 81. Locking nut; 9. Current transformer; 10. Power unit; 11. FRP assembly; 111. Column; 112. Shelf; 113. Reinforcement column; 114. Guard plate; 1121. Shelf plate; 1122. Through wiring hole; 1123. Connection hole; 1124. Protrusion.

[0023] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0025] Example 1

[0026] like Figures 1 to 3 As shown, a cascade medium-voltage frequency conversion cabinet using a mortise and tenon installation process includes a frame 1, door panels 2 arranged at the front and rear ends of the frame 1, a top cover 4 arranged at the top of the frame 1, a base arranged at the bottom of the frame 1, epoxy resin plates 6 arranged at the left and right ends of the frame 1, and a glass fiber reinforced plastic component 11 arranged inside the frame 1; a plurality of current transformers 9 distributed vertically are arranged inside the frame 1;

[0027] The frame 1 is made of hot-dip galvanized or aluminum-zinc coated structure;

[0028] The door panel 2 includes at least one single door panel, which is hinged to the frame 1; at least one ventilation grille 3 is arranged on the single door panel; filter cotton is arranged inside the ventilation grille 3, and the filter cotton is 45ppi filter cotton;

[0029] In this embodiment, a locking bolt 8 is provided on the door panel 2, and a locking nut 81 is provided on the frame 1, and after the door panel is closed, the locking bolt 8 and the locking nut 81 on the door panel correspond;

[0030] A fan 5 is arranged above the top cover 4, and an air outlet is arranged at a corresponding position of the top cover 4, and the fan 5 corresponds to a position above the power unit 10;

[0031] The epoxy resin plate 6 is provided with a plurality of wire guard rings 7 distributed vertically;

[0032] The FRP assembly 11 includes four columns 111, a plurality of layers 112 and a reinforcing column 113 arranged at four corners. The four corners of the layers 112 are connected to the columns 111. The reinforcing column 113 is arranged between two columns 111 in the long direction and is fixedly connected to each layer 112. A guard plate 114 is arranged on one side of the uppermost layer 112 close to the reinforcing column 113.

[0033] like Figure 4 As shown, the layer plate 112 is composed of a plurality of layer plates 1121 connected by mortise and tenon joints; a plurality of protrusions 1124 are evenly distributed on both end surfaces in the long direction of the layer plates 1121, and the protrusions on the two end surfaces are staggered to facilitate the mortise and tenon joints between the layer plates 1121; connection holes 1123 opened along the width direction of the layer plates 1121 are formed on the protrusions 1124, and after the protrusions 1124 of two layer plates 1121 are plugged in, the insulating rod is inserted into the connection hole and has an interference fit with the layer plates to achieve mortise and tenon joints.

[0034] A through wiring hole 1122 is formed in the middle of the layer plate 1121 along the width direction to facilitate line connection;

[0035] Each component of the FRP component 11 is made of SMC or FRP profiles, with the characteristics of CTI600, withstand voltage 60kV, and strength 400mpa. The FRP component 11 is produced by molding technology and connected by mortise and tenon joints.

[0036] A plurality of power units 10 are arranged on the layer plate of the glass fiber reinforced plastic assembly 11; an air inlet is arranged in front of the power unit 10, an air outlet is arranged behind the power unit 10, and a sealing strip is arranged at the air outlet;

[0037] The series connection wires between the multiple power units 10 pass through the current transformer 9; the number of the current transformers 9 is consistent with the number of the layers of the FRP assembly 11, and the series connection wires of the power units 10 on each layer pass through the current transformer 9 located at the same horizontal height.

[0038] The utility model has the following advantages:

[0039] (1) Floating installation of power unit: FRP components are placed inside the frame, power units are placed above the FRP components, and epoxy resin plates are placed on both sides of the frame. The entire power unit constitutes a floating system and is installed in cascade. The equipment is increased from 0V to 6kV or 10kV from left to right, which will not affect nearby equipment or discharge to nearby low-potential conductors.

[0040] (2) Use mortise and tenon installation technology to reduce the frequency of bolt use and improve structural reliability: The FRP components are connected by mortise and tenon joints, and the various components are locked together, which reduces the frequency of bolt use and reduces the impact of the charged position on the bolt discharge arc;

[0041] (3) Optimized air duct design: A ventilation grille is installed on the front door panel, a power unit is installed above the fiberglass component, an air inlet is set in front of the power unit, an air outlet is set behind the power unit, a sealing strip is installed at the air outlet, and a fan is installed above the top cover and at the rear of the equipment to ensure that the air path passes through the ventilation grille, completely flows through the power unit, and is extracted from the rear fan to ensure the reliability of heat dissipation;

[0042] (4) Wire protection, dust prevention, and intrinsic safety: Epoxy resin plates are installed on both sides of the frame, and wire guards are installed on the epoxy resin plates to ensure that the wires are passed through from left to right and are not cut. Wire guards are installed on the epoxy resin plates, and 45ppi filter cotton is installed inside the ventilation grille to achieve dust prevention. Locking bolts are installed on the front and rear door panels, and locking nuts are installed on the frame. After the door panels are closed, the locking bolts on the door panels correspond to the locking nuts. During normal operation, the bolts are locked to prevent misoperation.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0046] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A cascaded medium voltage frequency conversion cabinet using mortise and tenon installation technology, characterized in that: The invention comprises a frame (1), door panels (2) arranged at the front and rear ends of the frame (1), a top cover (4) arranged at the top of the frame (1), a base arranged at the bottom of the frame (1), epoxy resin plates (6) arranged at the left and right ends of the frame (1), and a glass fiber reinforced plastic component (11) arranged inside the frame (1); a plurality of current transformers (9) are arranged inside the frame (1); a fan (5) is arranged above the top cover (4); a plurality of power units (10) are arranged on the layer plate of the glass fiber reinforced plastic component (11); and the series connection wires between the plurality of power units (10) pass through the current transformers (9).

2. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 1 is characterized in that: The frame (1) adopts a hot-dip galvanized or aluminum-zinc coated structure.

3. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 1 is characterized in that: The door panel (2) comprises at least one single door panel, which is hingedly connected to the frame (1).

4. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 3 is characterized in that: At least one ventilation grille (3) is arranged on the single door panel.

5. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 4 is characterized in that: Filter cotton is arranged inside the ventilation grille (3).

6. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 1 is characterized in that: The door panel (2) is provided with a locking bolt (8), and the frame (1) is provided with a locking nut (81), and after the door panel (2) is closed, the locking bolt (8) and the locking nut (81) on the door panel (2) correspond to each other.

7. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 1 is characterized in that: A plurality of wire guard rings (7) distributed vertically are arranged on the epoxy resin plate (6).

8. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 1 is characterized in that: The glass fiber reinforced plastic component (11) comprises four columns (111) arranged at four corners and a plurality of layer plates (112); the four corners of the layer plates (112) are connected to the columns (111); the layer plates (112) are composed of a plurality of layer plates connected by mortise and tenon joints.

9. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 8 is characterized in that: The fiberglass reinforced plastic assembly (11) further comprises a reinforcing column (113), which is arranged between the two vertical columns (111) in the long direction and is fixedly connected to each layer plate (112); a guard plate (114) is arranged on one side of the uppermost layer plate (112) close to the reinforcing column (113).

10. The cascaded medium voltage frequency conversion cabinet using the mortise and tenon installation process according to claim 1, characterized in that: The number of the current transformers (9) is consistent with the number of layers of the glass fiber reinforced plastic assembly (11), and the series connection wires of the power units (10) on each layer pass through the current transformers (9) located at the same horizontal height.

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