Special junction box for high-efficiency explosion-proof three-phase asynchronous motor

Abstract

The utility model discloses a special junction box for a high-efficiency explosion-proof three-phase asynchronous motor, which comprises a box body, a box cover and a junction box bucket, a sealing ring is arranged between the box body and the box cover, the upper part of the box body is provided with a plurality of groups of threaded blind holes, and a plurality of groups of mounting bolts penetrate through the upper part of the box cover. One ends of the multiple sets of mounting bolts are located in the multiple sets of threaded blind holes correspondingly, the side walls of the multiple sets of mounting bolts are sleeved with spacer rings correspondingly, an air cylinder is installed above the box cover, an explosion-proof plate is installed on the lower portion of the box body, and multiple sets of wire holders are installed on the upper portion of the explosion-proof plate in a penetrating mode; wiring bolts penetrate through the upper parts of the multiple groups of wiring seats; and an annular groove is formed in the inner wall of one end of the box body. The beneficial effects of the junction box are that the junction box employs the air cylinder, the air cylinder is provided with a sealing detection structure, whether the wiring space is sealed or not can be known, and the use practicality of the junction box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flameproof motor junction boxes, in particular to a high-efficiency flameproof three-phase asynchronous motor special junction box. Background Art

[0002] Flameproof three-phase asynchronous motor is a kind of induction motor, which is powered by three-phase AC current. It has the characteristics of high efficiency, energy saving, good performance, low noise, low vibration and high reliability in actual use. The junction box is the main structure of the flameproof three-phase asynchronous motor. It has the advantages of simple operation, stable structure and good use effect in actual use.

[0003] The prior art discloses a YBX4 high-efficiency flameproof three-phase asynchronous motor terminal box with publication number: CN214900479U, which is convenient for wiring. The terminal box comprises a first bolt, a first washer, an O-ring, a terminal box cover, a first terminal bolt, a first bow-shaped washer, a nut, a second washer, a third washer, a second terminal bolt, a connecting piece, a terminal board, a second bolt, a terminal box seat, a metal washer, a sealing ring, a pressure plate, a fourth bolt, a fourth washer, a terminal box bucket, a third bolt, a grounding screw, a second bow-shaped washer, a flameproof joint surface between the terminal box seat and the terminal box cover, a flameproof joint surface between the terminal box seat and the terminal board, a flameproof surface and an incoming line cavity. The utility model arranges a terminal board in the terminal box seat, which can make the overall structure simple, simplify the assembly process, and improve the wiring efficiency. Terminal bolts of different lengths are arranged on the terminal board, which frees up the internal space of the terminal box and facilitates wiring. The terminal board can be designed as a three-line terminal or a six-line terminal to meet the wiring requirements of motors of different models. The terminal bolts are distributed in a ring shape to increase the wiring cavity. An incoming line cavity is provided on one side of the junction box seat. The appearance structure of the incoming line cavity can be cylindrical or truncated cone, which can adapt to different design requirements, increase the wiring space, and facilitate folding and placing longer wires in the incoming line cavity. A grounding screw is provided inside the junction box seat to facilitate grounding and improve the safety of the flameproof motor. A flameproof surface is provided at the bottom of the terminal block, and flameproof joint surfaces are provided between the junction box seat and the terminal block and the junction box cover to prevent the internal explosion from propagating to the explosive gas environment around the junction box housing. The utility model increases the incoming line cavity and the terminal block, integrates the wiring terminal design, and the wiring bolts are distributed in a ring shape and have different lengths, which solves the technical problems of small wiring cavity and inconvenient wiring in the previous junction box, and effectively improves the wiring efficiency. The utility model has a stable structure and neat arrangement, which provides a guarantee for the line safety of the YBX high-efficiency flameproof three-phase asynchronous motor terminal.

[0004] The above utility model needs to ensure the sealing of the internal space of the junction box to prevent moisture, dust and other impurities from entering the interior. When the junction box is installed, there is no sealing detection structure, and it is impossible to know whether the internal space of the junction box is sealed, and thus it is impossible to prevent moisture, dust and other impurities from entering the wiring space, which reduces the practicality of this utility model.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a high-efficiency flameproof three-phase asynchronous motor dedicated junction box, which has a sealing detection structure and can determine whether the wiring space is sealed, thereby solving the problems in the above-mentioned background technology.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned advantage of having a sealing detection structure and being able to know whether the wiring space is sealed, the specific technical solution adopted by the utility model is as follows:

[0010] A high-efficiency flameproof three-phase asynchronous motor special terminal box, comprising a box body, a box cover and a terminal box bucket, a sealing ring is arranged between the box body and the box cover, a plurality of groups of threaded blind holes are arranged on the upper part of the box body, a plurality of groups of mounting bolts are penetrated on the upper part of the box cover, and one end of the plurality of groups of mounting bolts is respectively located inside the plurality of groups of threaded blind holes, a plurality of groups of mounting bolts are sleeved on the side walls of the plurality of groups of mounting bolts, an air storage cylinder is installed above the box cover, a flameproof plate is installed on the lower part of the box body, and a plurality of groups of terminal blocks are penetrated on the upper part of the flameproof plate, and the upper parts of the plurality of groups of terminal blocks are penetrated by terminal bolts, an annular groove is arranged on the inner wall of one end of the box body, and the annular groove A rubber ring and a metal gasket are provided inside the groove, and a plurality of groups of connecting bolts are installed between the box body and the junction box bucket and between the box body and the explosion-proof plate, and the side walls of the plurality of groups of connecting bolts are sleeved with spacer gaskets and connecting nuts, an air bag is installed above the box body, and two groups of connecting plates are installed between the box cover and the gas cylinder, an air outlet pipe is installed through the lower part of the gas cylinder, and one end of the air outlet pipe passes through the upper part of the box cover, an air inlet pipe is fixedly penetrated through the side wall of the gas cylinder, and opening and closing valves are installed on the side walls of the air outlet pipe and the air inlet pipe, a gantry is installed on the upper part of the gas cylinder, and a T-shaped rod is slidably penetrated through the upper part of the gantry, and a piston plate is installed at the lower end of the T-shaped rod.

[0011] Furthermore, the diameter length of the piston plate is the same as the inner diameter length of the air storage cylinder.

[0012] Furthermore, a connecting ear is installed on the upper part of the box body, and a pull rope passes through the inside of the connecting ear, and a limit block is installed on one end of the pull rope, and the other end of the pull rope is fixedly connected to the lower part of the airbag, and plastic plates are installed on the inner top and bottom surfaces of the airbag, and a magnet column is installed between the two groups of plastic plates, and an air duct is fixedly passed through the side wall of the airbag, and a control valve is installed on the side wall of the air duct.

[0013] Furthermore, the diameter length of the limiting block is greater than the inner diameter length of the connecting ear.

[0014] Furthermore, the plurality of groups of threaded blind holes cooperate with the plurality of groups of mounting bolt threads.

[0015] Furthermore, the threads of the multiple groups of connecting bolts and the multiple groups of connecting nuts cooperate with each other.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a high-efficiency flameproof three-phase asynchronous motor dedicated junction box, which has the following beneficial effects:

[0018] (1) The utility model adopts an air storage cylinder. When the high-efficiency flameproof three-phase asynchronous motor special junction box is actually used, the operator manually closes a set of on-off valves on the right side, and then opens and closes a set of on-off valves below. After that, the operator manually moves the T-shaped rod downward. The T-shaped rod can drive the piston plate to move downward. The downward piston plate can push the gas inside the air storage cylinder into the box body through the outlet pipe. The operator can then use his hand to feel whether there is leakage at the connection of the box body. The operator manually closes the set of on-off valves below and opens and closes the set of on-off valves on the right side. After that, the T-shaped rod is moved upward. During the upward movement of the piston plate, external gas can enter the interior of the air storage cylinder through the inlet pipe. The above operation is repeated to continue to detect the connection of the box body. The air storage cylinder is provided with a sealing detection structure, which can determine whether the wiring space is sealed, thereby improving the practicality of the high-efficiency flameproof three-phase asynchronous motor special junction box.

[0019] (2) The utility model adopts an air bag. When the operator uses a tool to remove multiple sets of mounting bolts, multiple sets of connecting bolts and multiple sets of connecting nuts, the magnet column can be used to absorb the removed multiple sets of mounting bolts, multiple sets of connecting bolts and multiple sets of connecting nuts. Due to the presence of the pull rope, the magnet column is prevented from being separated from the box body too far, and the multiple sets of mounting bolts, multiple sets of connecting bolts and multiple sets of connecting nuts are prevented from being lost. When it is necessary to install multiple sets of mounting bolts, multiple sets of connecting bolts and multiple sets of connecting nuts, the operator can blow air into the air guide tube, and the air bag will gradually inflate. When the air bag inflates, the absorbed multiple sets of mounting bolts, multiple sets of connecting bolts and multiple sets of connecting nuts will fall off. At this time, the multiple sets of mounting bolts, multiple sets of connecting bolts and multiple sets of connecting nuts can be used for installation work. The two sets of plastic plates play the role of installing the magnet column, and the limit block prevents the pull rope from being separated from the connecting ear. The air bag is set to prevent the removed mounting bolts, connecting bolts and connecting nuts from being lost, which provides protection for the installation of a special terminal box for a high-efficiency flameproof three-phase asynchronous motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a structural schematic diagram of a high-efficiency flameproof three-phase asynchronous motor special junction box proposed by the utility model;

[0022] Figure 2 It is a stereogram of the connecting ear proposed by the utility model;

[0023] Figure 3 The utility model proposes Figure 1 A magnified view of middle;

[0024] Figure 4 The utility model proposes Figure 1 Enlarged view of middle B;

[0025] Figure 5 The utility model proposes Figure 1 Enlarged view of middle C;

[0026] Figure 6 The utility model proposes Figure 1 Enlarged view of D in the middle.

[0027] In the figure:

[0028] 1. Box body; 2. Box cover; 3. Sealing ring; 4. Threaded blind hole; 5. Mounting bolt; 6. Spacer; 7. Flameproof plate; 8. Terminal block; 9. Terminal bolt; 10. Annular groove; 11. Rubber ring; 12. Metal gasket; 13. Terminal box bucket; 14. Connecting bolt; 15. Air bag; 16. Air storage cylinder; 17. Connecting plate; 18. Air outlet pipe; 19. Air inlet pipe; 20. Open and close valve; 21. Gantry; 22. T-bar; 23. Piston plate; 24. Connecting ear; 25. Pull rope; 26. Limit block; 27. Plastic plate; 28. Magnet column; 29. ​​Air guide pipe; 30. Control valve. DETAILED DESCRIPTION

[0029] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] According to an embodiment of the utility model, a high-efficiency flameproof three-phase asynchronous motor dedicated junction box is provided.

[0031] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-6As shown, according to an embodiment of the utility model, a high-efficiency flameproof three-phase asynchronous motor dedicated terminal box comprises a box body 1, a box cover 2 and a terminal box bucket 13, a sealing ring 3 is arranged between the box body 1 and the box cover 2, a plurality of groups of threaded blind holes 4 are arranged on the upper part of the box body 1, a plurality of groups of mounting bolts 5 are penetrated on the upper part of the box cover 2, and one end of the plurality of groups of mounting bolts 5 are respectively located inside the plurality of groups of threaded blind holes 4, the side walls of the plurality of groups of mounting bolts 5 are sleeved with spacer rings 6, an air storage cylinder 16 is installed above the box cover 2, a flameproof plate 7 is installed on the lower part of the box body 1, and a plurality of groups of terminal blocks 8 are penetrated on the upper part of the flameproof plate 7, and the upper parts of the plurality of groups of terminal blocks 8 are penetrated with terminal bolts 9, an annular groove 10 is arranged on the inner wall of one end of the box body 1, a rubber ring 11 and a metal gasket 12 are arranged inside the annular groove 10, and a sealing ring 11 and a metal gasket 12 are arranged between the box body 1 and the terminal box bucket 13 and between the box body 1 and the insulation Multiple groups of connecting bolts 14 are installed through the explosion plates 7, and the side walls of the multiple groups of connecting bolts 14 are sleeved with spacer rings 6 and connecting nuts. An air bag 15 is installed on the top of the box body 1, and two groups of connecting plates 17 are installed between the box cover 2 and the air storage cylinder 16. An outlet pipe 18 is installed through the lower part of the air storage cylinder 16, and one end of the outlet pipe 18 passes through the upper part of the box cover 2. An inlet pipe 19 is fixedly penetrated through the side wall of the air storage cylinder 16, and the side walls of the outlet pipe 18 and the inlet pipe 19 are both installed with opening and closing valves 20. A gantry 21 is installed on the upper part of the air storage cylinder 16, and a T-shaped rod 22 is slidably penetrated through the upper part of the gantry 21, and a piston plate 23 is installed at the lower end of the T-shaped rod 22. The air storage cylinder 16 is provided with a sealing detection structure, which can be used to know whether the wiring space is sealed, thereby improving the practicality of the special terminal box for high-efficiency flameproof three-phase asynchronous motors.

[0032] In one embodiment, the diameter of the piston plate 23 is the same as the inner diameter of the gas cylinder 16 , so as to ensure that the piston plate 23 can push the gas inside the gas cylinder 16 out.

[0033] In one embodiment, a connecting ear 24 is installed on the upper part of the box body 1, and a pull rope 25 is passed through the inside of the connecting ear 24, and a limit block 26 is installed at one end of the pull rope 25, and the other end of the pull rope 25 is fixedly connected to the lower part of the airbag 15, and plastic plates 27 are installed on the inner top and bottom surfaces of the airbag 15, and a magnet column 28 is installed between the two groups of plastic plates 27. An air guide tube 29 is fixedly passed through the side wall of the airbag 15, and a control valve 30 is installed on the side wall of the air guide tube 29. The set airbag 15 can avoid the loss of the removed mounting bolts 5, connecting bolts 14 and connecting nuts, thereby ensuring the installation of a special terminal box for a high-efficiency flameproof three-phase asynchronous motor.

[0034] In one embodiment, the diameter of the limiting block 26 is greater than the inner diameter of the connecting ear 24 to prevent the pull rope 25 from being separated from the connecting ear 24 .

[0035] In one embodiment, the multiple groups of threaded blind holes 4 and the multiple groups of mounting bolts 5 threads cooperate with each other, so as to facilitate the adjustment of the use positions of the multiple groups of mounting bolts 5.

[0036] In one embodiment, the threads of the multiple sets of connecting bolts 14 and the multiple sets of connecting nuts cooperate with each other to facilitate adjustment of the use positions of the multiple sets of connecting nuts.

[0037] Working principle:

[0038] When actually using the high-efficiency flameproof three-phase asynchronous motor special junction box, the operator closes the right set of on-off valves 20 by hand, and then opens and closes the lower set of on-off valves 20. After that, the operator moves the T-shaped rod 22 downward by hand. The T-shaped rod 22 can drive the piston plate 23 to move downward. The downward piston plate 23 can push the gas inside the gas storage cylinder 16 into the box body 1 through the outlet pipe 18. The operator can now feel whether there is leakage at the connection of the box body 1 by hand. The operator closes the lower set of on-off valves 20 by hand again, and opens and closes the right set of on-off valves 20 at the same time. After that, the T-shaped rod 22 is moved upward. During the upward movement of the piston plate 23, external gas can enter the inside of the gas storage cylinder 16 through the intake pipe 19. Repeat the above operation to continue to detect the connection of the box body 1. The gas storage cylinder 16 is provided with a sealing detection structure, so that it can be known whether the wiring space is sealed, thereby improving the practicality of the use of the high-efficiency flameproof three-phase asynchronous motor special junction box. At the same time, the operator uses tools to remove multiple sets of mounting bolts 5 and multiple sets of connecting bolts When the multiple sets of mounting bolts 5, multiple sets of connecting bolts 14 and multiple sets of connecting nuts are installed, the magnet column 28 can be used to absorb the removed multiple sets of mounting bolts 5, multiple sets of connecting bolts 14 and multiple sets of connecting nuts. Due to the presence of the pull rope 25, the magnet column 28 is prevented from being too far away from the box body 1, and the multiple sets of mounting bolts 5, multiple sets of connecting bolts 14 and multiple sets of connecting nuts are prevented from being lost. When multiple sets of mounting bolts 5, multiple sets of connecting bolts 14 and multiple sets of connecting nuts need to be installed, the operator can blow air into the air guide 29, and the air bag 15 will gradually swell. When the air bag 15 swells , the adsorbed multiple sets of mounting bolts 5, multiple sets of connecting bolts 14 and multiple sets of connecting nuts will fall off. At this time, multiple sets of mounting bolts 5, multiple sets of connecting bolts 14 and multiple sets of connecting nuts can be used for installation work. The two sets of plastic plates 27 play the role of installing the magnet column 28. The limit block 26 prevents the pull rope 25 from being separated from the connecting ear 24. The air bag 15 is set to avoid the loss of the removed mounting bolts 5, connecting bolts 14 and connecting nuts, which provides protection for the installation of the special terminal box for high-efficiency flameproof three-phase asynchronous motor.

[0039] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency flameproof three-phase asynchronous motor special junction box, characterized in that: The invention comprises a box body (1), a box cover (2) and a junction box bucket (13), wherein a sealing ring (3) is arranged between the box body (1) and the box cover (2), a plurality of groups of threaded blind holes (4) are arranged on the upper part of the box body (1), a plurality of groups of mounting bolts (5) are passed through the upper part of the box cover (2), and one end of the plurality of groups of mounting bolts (5) is respectively located inside the plurality of groups of threaded blind holes (4), and the side walls of the plurality of groups of mounting bolts (5) are sleeved with spacer rings (6). ), an air storage cylinder (16) is installed above the box cover (2), an explosion-proof plate (7) is installed at the bottom of the box body (1), and a plurality of wiring seats (8) are installed through the top of the explosion-proof plate (7), and a wiring bolt (9) is installed through the top of the plurality of wiring seats (8), and an annular groove (10) is provided on the inner wall of one end of the box body (1), and a rubber ring (11) and a metal gasket (12) are provided inside the annular groove (10), and the A plurality of groups of connecting bolts (14) are installed between the box body (1) and the junction box bucket (13) and between the box body (1) and the explosion-proof plate (7), and the side walls of the plurality of groups of connecting bolts (14) are sleeved with spacer rings (6) and connecting nuts. An air bag (15) is installed above the box body (1), two groups of connecting plates (17) are installed between the box cover (2) and the gas storage cylinder (16), and an air outlet pipe (18) is installed at the bottom of the gas storage cylinder (16). ), and one end of the air outlet pipe (18) passes through the upper part of the box cover (2), the side wall of the air storage cylinder (16) is fixedly penetrated by an air inlet pipe (19), the side walls of the air outlet pipe (18) and the air inlet pipe (19) are both installed with opening and closing valves (20), the upper part of the air storage cylinder (16) is installed with a gantry (21), and the upper part of the gantry (21) is slidably penetrated by a T-shaped rod (22), and the lower end of the T-shaped rod (22) is installed with a piston plate (23).

2. A high-efficiency flameproof three-phase asynchronous motor dedicated junction box according to claim 1, characterized in that: The diameter length of the piston plate (23) is the same as the inner diameter length of the gas storage cylinder (16).

3. A high-efficiency flameproof three-phase asynchronous motor dedicated junction box according to claim 1, characterized in that: A connecting ear (24) is installed on the upper part of the box body (1), and a drawstring (25) is passed through the interior of the connecting ear (24), and a limit block (26) is installed at one end of the drawstring (25), and the other end of the drawstring (25) is fixedly connected to the lower part of the airbag (15), and plastic plates (27) are installed on the internal top and bottom surfaces of the airbag (15), and a magnet column (28) is installed between two groups of the plastic plates (27), and an air guide tube (29) is fixedly passed through the side wall of the airbag (15), and a control valve (30) is installed on the side wall of the air guide tube (29).

4. A high-efficiency flameproof three-phase asynchronous motor dedicated junction box according to claim 3, characterized in that: The diameter length of the limiting block (26) is greater than the inner diameter length of the connecting ear (24).

5. A high-efficiency flameproof three-phase asynchronous motor dedicated junction box according to claim 1, characterized in that: The plurality of groups of threaded blind holes (4) and the plurality of groups of mounting bolt (5) threads cooperate with each other.

6. A high-efficiency flameproof three-phase asynchronous motor dedicated junction box according to claim 1, characterized in that: The threads of the multiple groups of connecting bolts (14) and the multiple groups of connecting nuts cooperate with each other.

Images