Auxiliary junction box for explosion-proof motor and explosion-proof motor

Abstract

The utility model relates to an auxiliary junction box for an explosion-proof motor and the explosion-proof motor, and the junction box comprises a box seat which is internally provided with a wiring terminal; the cable leading-in and pressing device is arranged at the bottom of the box seat and used for leading cables with different diameters into the box seat and pressing the cables, and the cables are connected to the wiring terminals; the cable lead-in pressing device comprises a sealing ring used for a cable to penetrate through and a pressing part used for pressing the sealing ring. According to the auxiliary junction box for the explosion-proof motor, the cable lead-in pressing device is arranged at the bottom of the box base, and various cables of the explosion-proof motor are led in from the bottom of the box base through the cable lead-in pressing device, so that the explosion-proof requirement of the auxiliary junction box for the explosion-proof motor is met; and the waiting time for pouring and curing by epoxy sealant after each cable is connected into the auxiliary junction box from the inside of the explosion-proof motor is avoided, the assembly efficiency is improved, and once sensors connected with part of the cables are damaged, only a certain element needs to be replaced and re-introduced, so that the whole auxiliary junction box cannot be scrapped.

Description

Technical Field

[0001] The present application relates to the technical field of junction boxes, and in particular to an auxiliary junction box for explosion-proof motors and an explosion-proof motor. Background Art

[0002] The auxiliary junction box for explosion-proof motors is mainly used for the temperature measurement of the motor and the cable connection of the heater, as well as the cable connection of the vibration measurement and the current measurement, as well as data acquisition, display and control.

[0003] When the above cables enter the auxiliary junction box from the inside of the motor, they must be introduced from the bottom of the auxiliary junction box. Because it is an explosion-proof structure, the current conventional process is to introduce the cables from the bottom of the auxiliary junction box into the auxiliary junction box, and then perform epoxy resin encapsulation at the bottom entry part of the auxiliary junction box. After encapsulation, it is necessary to wait for a long time to cure, generally 8 to 24 hours, before the next step of assembly can be carried out, which seriously affects the assembly efficiency on site. Moreover, the epoxy resin encapsulation cannot be disassembled after curing. Once the cable is damaged or the sensor connected to the cable is damaged, the entire auxiliary junction box needs to be scrapped and updated.

[0004] Therefore, there is an urgent need to provide an auxiliary junction box for explosion-proof motors and explosion-proof motors to solve the above-mentioned technical problems. Utility Model Content

[0005] Based on this, an auxiliary junction box for explosion-proof motors and an explosion-proof motor are provided, which can solve the problem of introducing cables from the inside of the explosion-proof motor into the auxiliary junction box for assembly without on-site sealing and facilitate subsequent maintenance.

[0006] On the one hand, an auxiliary junction box for an explosion-proof motor is provided, comprising: a box seat, wherein a wiring terminal is arranged inside the box seat; a box cover, wherein the box cover and the box seat are used together; a cable introduction and clamping device, wherein the cable introduction and clamping device is arranged at the bottom of the box seat, and is used to introduce cables of different wire diameters into the interior of the box seat and clamp them, wherein the cables are connected to the wiring terminals; wherein the cable introduction and clamping device comprises a sealing ring for the cable to pass through and a clamping portion for clamping the sealing ring.

[0007] A preferred solution is that a plurality of groups of threading holes and fixing holes are provided at the bottom of the box seat, the threading holes and fixing holes in each group are interconnected and the diameter of the fixing hole is larger than the diameter of the threading hole; the sealing ring is respectively arranged in each of the fixing holes; the cable is connected to the wiring terminal after passing through the threading holes and the sealing rings in sequence from the outside of the box seat; the clamping portion presses the sealing ring into the fixing hole to clamp the cable.

[0008] A preferred solution is that the clamping part includes a clamping gasket and a clamping nut; an internal threaded hole is provided on the inner side of the bottom of the box seat, and the internal threaded hole is connected to the fixing hole; the clamping gasket is provided on the side of the sealing ring away from the threading hole; the clamping nut is threadedly connected in the internal threaded hole and clamps the side of the clamping gasket away from the sealing ring.

[0009] A preferred solution is that the sealing ring is configured to have a porous structure; a wire threading hole and a fixing hole are provided at the bottom of the box seat, the wire threading hole and the fixing hole are interconnected and the diameter of the fixing hole is larger than the diameter of the wire threading hole; the sealing ring with a porous structure is arranged in the fixing hole; the cable is connected to the terminal after passing through the wire threading hole and the sealing ring with a porous structure in sequence from the outside of the box seat; the clamping portion presses the sealing ring in the fixing hole to clamp the cable.

[0010] A preferred solution is that the clamping part includes a clamping gasket and a clamping nut; an internal threaded hole is provided on the inner side of the bottom of the box seat, and the internal threaded hole is connected to the fixing hole; the clamping gasket is provided on opposite sides of the sealing ring; the clamping nut is threadedly connected in the internal threaded hole and clamps one of the clamping gaskets on the side away from the sealing ring.

[0011] A preferred solution is that the cable introduction clamping device also includes a cable introduction part, and the sealing ring is configured to have a porous structure; the cable introduction part is detachably arranged at the bottom of the box seat; the sealing ring with a porous structure is arranged between the cable introduction part and the clamping part, and the cable line is connected to the terminal after passing through the clamping part, the sealing ring with a porous structure and the cable introduction part in sequence from the outside of the box seat; the clamping part presses the sealing ring between the cable introduction part and the clamping part to clamp the cable line.

[0012] A preferred solution is that a snap-in hole is provided at the bottom of the box seat, and the cable lead-in part is snap-fitted into the snap-in hole; the first end of the cable lead-in part located inside the box seat is fastened by a locking nut; and the second end of the cable lead-in part located outside the box seat is fastened by the clamping part.

[0013] A preferred solution is that the clamping portion includes a clamping gasket and a clamping nut; the clamping gasket is arranged on opposite sides of the sealing ring; the clamping nut is threadedly connected to the second end of the cable lead-in portion and clamps one side of the clamping gasket away from the sealing ring.

[0014] A preferred solution is that the auxiliary junction box further includes a signal source introduction device, which is arranged on the side of the box seat and is used for power supply introduction and signal extraction.

[0015] On the other hand, an explosion-proof motor is also provided, comprising the auxiliary junction box for the explosion-proof motor.

[0016] Beneficial effects:

[0017] The above-mentioned auxiliary junction box and explosion-proof motor for explosion-proof motor, by arranging a cable introduction and clamping device at the bottom of the auxiliary junction box, that is, the bottom of the box seat, various cables of the explosion-proof motor are respectively introduced from the bottom of the box seat through the sealing ring into the interior of the auxiliary junction box, and clamped with the sealing ring, that is, the explosion-proof structural requirements of the auxiliary junction box for explosion-proof motor are met, and the sealing ring is compressed by the clamping part to clamp the cable, and the current process of each cable being connected to the auxiliary junction box from the inside of the explosion-proof motor and then sealed and cured with epoxy sealant is avoided, thereby improving assembly efficiency and saving assembly space. Once the sensors connected to some cables, such as temperature sensors or vibration sensors, are damaged, only a certain component needs to be replaced and reintroduced, and the entire auxiliary junction box will not be scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the auxiliary junction box for the explosion-proof motor in the first embodiment;

[0019] Figure 2 For along Figure 1 AA line section view;

[0020] Figure 3 It is a rear view of the auxiliary junction box for the explosion-proof motor in the first embodiment;

[0021] Figure 4 This is a bottom view of the auxiliary junction box for the explosion-proof motor in the first embodiment;

[0022] Figure 5 is a cross-sectional view of the sealing ring in the first embodiment;

[0023] Figure 6 It is a front view of the compression gasket in the first embodiment;

[0024] Figure 7 It is a front view of the compression nut in the first embodiment;

[0025] Figure 8 This is a front view of the auxiliary junction box for the explosion-proof motor in the second embodiment;

[0026] Fig. 9 For along Figure 8 BB line section view;

[0027] Fig.10 It is a front view of the compression gasket in the second embodiment;

[0028] Fig.11 This is a front view of the sealing ring in the second embodiment;

[0029] Fig.12 is a cross-sectional view of the sealing ring in the second embodiment;

[0030] Fig.13 This is a front view of the auxiliary junction box for the explosion-proof motor in the third embodiment;

[0031] Fig.14 For along Fig.13 The CC line section view in the figure;

[0032] Fig.15 This is a front view of the sealing ring in the third embodiment;

[0033] Fig.16 It is a half-section view of the sealing ring in the third embodiment.

[0034] Figure numerals: 1. box seat; 11. wiring terminal; 12. threading hole; 13. fixing hole; 14. internal thread hole; 15. snap-on hole; 2. box cover; 31. sealing ring; 32. clamping part; 321 clamping gasket; 322, clamping nut; 33. cable introduction part; 4. cable line; 5. signal source introduction device. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0036] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present application in a schematic manner, and therefore the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0037] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0038] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] The embodiment of the present application provides an auxiliary junction box and an explosion-proof motor for an explosion-proof motor. A cable introduction and clamping device is arranged at the bottom of the auxiliary junction box to introduce and clamp each cable separately. Compared with the traditional method in which each cable needs to be sealed and cured with epoxy sealant after being connected to the auxiliary junction box from the inside of the motor, the present application adopts such a sealing ring and a clamping part to reduce waiting time and improve assembly efficiency. Once the sensors connected to some cables, such as temperature sensors or vibration sensors, are damaged, it is only necessary to replace a certain component and reintroduce them, without causing the entire auxiliary junction box to be scrapped.

[0040] Embodiment 1

[0041] The following is a detailed description of an auxiliary junction box for explosion-proof motors provided in this embodiment. Figure 1-Figure 7 As shown, it includes: a box base 1, a box cover 2 and a cable introduction and clamping device, the box cover 2 and the box base 1 are used in combination, and the box base 1 is provided with a wiring terminal 11 inside; the cable introduction and clamping device is arranged at the bottom of the box base 1, and is used to introduce cables 4 of different wire diameters into the inside of the box base 1 and clamp them, and the cables 4 are connected to the wiring terminal 11, wherein the cable introduction and clamping device includes a sealing ring 31 for the cable 4 to pass through and a clamping portion 32 for clamping the sealing ring 31.

[0042] In this embodiment, a cable introduction and clamping device is arranged at the bottom of the auxiliary junction box, that is, the bottom of the box seat 1, so that cables 4 of various wire diameters of the explosion-proof motor can be respectively introduced from the bottom of the box seat 1 into the interior of the auxiliary junction box through the sealing ring 31, and clamped by the sealing ring 31, thereby meeting the explosion-proof structural requirements of the auxiliary junction box for explosion-proof motors, and at the same time, the sealing ring 31 is compressed by the clamping part 32, thereby avoiding the waiting time for the epoxy sealant to be cast and cured after each cable 4 is connected to the auxiliary junction box from the inside of the explosion-proof motor in the current process, thereby improving the assembly efficiency, saving the assembly site, and once the sensors connected to some cables 4, such as temperature sensors or vibration sensors, are damaged, it is only necessary to replace a certain component and reintroduce them, and the entire auxiliary junction box will not be scrapped.

[0043] In this embodiment, it should be noted that the above-mentioned auxiliary junction box needs to introduce a core temperature measurement cable, four vibration measurement cables, three current measurement cables and one heater cable from the bottom. For this purpose, the cable introduction and clamping device arranged at the bottom of the auxiliary junction box must at least meet the requirement of providing for the introduction of nine cables.

[0044] Please continue to refer to Figure 1-Figure 7 As shown, in one achievable manner, a plurality of groups of threading holes 12 and fixing holes 13 are provided at the bottom of the box seat 1. The plurality of threading holes 12 and fixing holes 13 can be arranged in a circular array at the bottom of the box seat 1, and a group of threading holes 12 and fixing holes 13 are provided at the middle position. In this embodiment, nine groups of threading holes 12 and fixing holes 13 are provided. It can be understood that nine cables 4 can be inserted, wherein eight groups of threading holes 12 and fixing holes 13 are arranged in a circular array around the middle group of threading holes 12 and fixing holes 13. The threading holes 12 are arranged near the outside of the box seat 1, and the fixing holes 13 are arranged near the inside of the box seat 1. The threading holes 12 and fixing holes 13 in each group are interconnected and the diameter of the fixing holes 13 is greater than the diameter of the threading holes 12. Thus, only the threading holes 12 arranged in a circular array can be seen from the outside of the bottom of the box seat 1.

[0045] There are nine sealing rings 31, and the nine sealing rings 31 correspond to the nine groups of threading holes 12 and fixing holes 13. The sealing rings 31 are respectively arranged in each fixing hole 13, so that each cable 4 can be respectively inserted into the inside of the box seat 1 and connected to the terminal 11 after passing through the threading holes 12 and the sealing rings 31 arranged in sequence from the outside of the box seat 1. The pressing portion 32 is used to press the sealing ring 31 into the fixing hole 13 to clamp the cable 4. By pressing the sealing ring 31 with the pressing portion 32, the sealing ring 31 can be pressed into the fixing hole 13 and then the cable 4 can be clamped. In this way, by using nine sealing rings 31, each sealing ring 31 corresponds to a cable 4, which is convenient for threading.

[0046] In one example, the clamping portion 32 includes a clamping gasket 321 and a clamping nut 322; an internal threaded hole 14 is provided on the inner side of the bottom of the box seat 1, the internal threaded hole 14 is connected to the fixing hole 13, and the clamping gasket 321 is provided on the side of the sealing ring 31 away from the threading hole 12. The clamping nut 322 is threadedly connected in the internal threaded hole 14 and is clamped on the side of the clamping gasket 321 away from the sealing ring 31. Thus, the clamping nut 322 acts on the clamping gasket 321, and the sealing ring 31 can be indirectly clamped in the fixing hole 13 through the clamping gasket 321, and the sealing ring 31 clamps the cable 4.

[0047] In this embodiment, it should be noted that the auxiliary junction box further includes a signal source introduction device 5, which is arranged on the side of the box seat 1 and is used for power supply introduction and signal extraction.

[0048] The implementation principle of this embodiment is as follows: when assembling the explosion-proof motor, the cables 4 inside the explosion-proof motor are introduced into the box seat 1 from the threading holes 12 at the bottom of the box seat 1 in turn, and installed on the terminal 11 as required. The sealing ring 31 and the clamping gasket 321 are passed through the cable 4 and fixed in the fixing hole 13. Then, the clamping nut 322 is passed through the cable 4 and threadedly matched with the internal threaded hole 14. The sealing ring 31 is clamped by the clamping gasket 321, so that the introduction of the cable 4 meets the explosion-proof structure requirements. Subsequently, the box seat 1 is fixed to the explosion-proof motor. After the box cover 2 is assembled, the assembly of the auxiliary junction box for the explosion-proof motor can be completed. On-site casting is no longer required, which saves the time required for the explosion-proof motor wiring assembly site and improves the assembly efficiency.

[0049] Embodiment 2

[0050] The difference between the second embodiment and the first embodiment is: Figure 8-Figure 12 As shown, the sealing ring 31 is configured to have a porous structure. It can be understood that nine holes can be provided on the sealing ring 31, and the nine holes are arranged in a circular array with a middle hole and other holes around the middle hole. Therefore, by using one sealing ring 31, nine cables 4 can be inserted at the same time.

[0051] Therefore, a threading hole 12 and a fixing hole 13 are provided at the bottom of the box seat 1. The threading hole 12 and the fixing hole 13 are interconnected and the diameter of the fixing hole 13 is larger than the diameter of the threading hole 12. The threading hole 12 is arranged close to the outside of the box seat 1, and the fixing hole 13 is arranged close to the inside of the box seat 1. The sealing ring 31 with a porous structure is arranged in the fixing hole 13. Then, each cable 4 can be respectively passed through the threading hole 12 and the sealing ring 31 from the outside of the box seat 1 in sequence, and then extended into the inside of the box cover 2 and connected to the terminal 11; the pressing part 32 is used to press the sealing ring 31 in the fixing hole 13 to clamp the cable 4.

[0052] In one example, the clamping portion 32 includes a clamping gasket 321 and a clamping nut 322; an internal threaded hole 14 is provided on the inner side of the bottom of the box seat 1, and the internal threaded hole 14 is connected to the fixing hole 13; the clamping gasket 321 is configured to have the same structure as the sealing ring 31, which is a porous structure, and the clamping gasket 321 is disposed on opposite sides of the sealing ring 31, and the clamping nut 322 is threadedly connected in the internal threaded hole 14 and clamps one side of the clamping gasket 321 away from the sealing ring 31.

[0053] When assembling the explosion-proof motor, the cables 4 inside the explosion-proof motor are introduced into the box seat 1 from the threading holes 12 at the bottom of the box seat 1. It can be understood that the cables 4 are respectively inserted into the holes of the sealing ring 31 and the two compression washers 321, the sealing ring 31 is fixed in the fixing hole 13, and the compression nut 322 is used to pass through the cable 4 and cooperate with the internal threaded hole 14. The sealing ring 31 is clamped by the compression washers 321, so that the introduction of the cable 4 meets the explosion-proof structure requirements.

[0054] Embodiment 3

[0055] The difference between the third embodiment and the first embodiment is: Figure 13-Figure 16 As shown, the bottom of the box seat 1 is a thin-walled structure. At this time, the cable introduction clamping device and the box seat 1 are detachably connected. The cable introduction clamping device also includes a cable introduction part 33, and the sealing ring 31 is configured to have a porous structure. The cable introduction part 33 is detachably arranged at the bottom of the box seat 1, and the sealing ring 31 with a porous structure is arranged between the cable introduction part 33 and the clamping part 32. The cable 4 passes through the clamping part 32, the sealing ring 31 with a porous structure and the cable introduction part 33 from the outside of the box seat 1 in sequence, and then extends into the inside of the box seat 1 and is connected to the terminal 11. The clamping part 32 is used to compress the sealing ring 31 between the cable introduction part 33 and the clamping part 32 to clamp the cable 4.

[0056] In one example, a snap-in hole 15 connected to the interior of the box seat 1 is provided at the bottom, and the cable lead-in portion 33 is snap-fitted into the snap-in hole 15. The first end of the cable lead-in portion 33 located inside the box seat 1 is fastened to the inner side of the bottom of the box seat 1 through a locking nut 34, and the second end of the cable lead-in portion 33 located outside the box seat 1 is fastened to the outer side of the bottom of the box seat 1 through a clamping portion 32.

[0057] The clamping portion 32 includes a clamping gasket 321 and a clamping nut 322. The clamping gasket 321 is configured to have the same structure as the sealing ring 31 and is a porous structure. The clamping gasket 321 is arranged on opposite sides of the sealing ring 31; the clamping nut 322 is threadedly connected to the second end of the cable lead-in portion 33 and clamps one side of the clamping gasket 321 away from the sealing ring 31.

[0058] When assembling the explosion-proof motor, the cables 4 inside the explosion-proof motor are respectively inserted into the clamping nut 322, the clamping gasket 321, the sealing ring 31 with a porous structure, the clamping gasket 321 and the cable lead-in part 33 in turn, and then introduced into the box seat 1, and then the clamping nut 322 and the second end of the cable lead-in part 33 are threadedly matched to compress the sealing ring 31, and then the first end of the cable lead-in part 33 is fixed to the box seat 1 using the locking nut 34.

[0059] Embodiment 4

[0060] This embodiment also provides an explosion-proof motor, including the auxiliary junction box for the above-mentioned explosion-proof motor.

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An auxiliary junction box for an explosion-proof motor, characterized in that: include: A box seat (1), wherein a connection terminal (11) is arranged inside the box seat (1); A box cover (2), the box cover (2) and the box base (1) are used in combination; A cable introduction and clamping device, the cable introduction and clamping device being arranged at the bottom of the box seat (1) and being used for introducing cables (4) of different wire diameters into the interior of the box seat (1) and clamping them, the cables (4) being connected to the wiring terminals (11); The cable introduction and clamping device comprises a sealing ring (31) for the cable (4) to pass through and a clamping portion (32) for clamping the sealing ring (31).

2. The auxiliary junction box for explosion-proof motor according to claim 1, characterized in that: The bottom of the box seat (1) is provided with a plurality of groups of threading holes (12) and fixing holes (13), the threading holes (12) and fixing holes (13) in each group are interconnected, and the diameter of the fixing holes (13) is larger than the diameter of the threading holes (12); The sealing ring (31) is respectively arranged in each of the fixing holes (13); The cable (4) is connected to the connection terminal (11) after passing through the threading hole (12) and the sealing ring (31) in sequence from the outside of the box seat (1); The pressing portion (32) presses the sealing ring (31) into the fixing hole (13) to clamp the cable (4).

3. The auxiliary junction box for explosion-proof motor according to claim 2, characterized in that: The pressing portion (32) comprises a pressing gasket (321) and a pressing nut (322); An internal threaded hole (14) is provided on the inner side of the bottom of the box seat (1), and the internal threaded hole (14) is connected to the fixing hole (13); The compression gasket (321) is arranged on a side of the sealing ring (31) away from the threading hole (12); The clamping nut (322) is threadedly connected in the internal threaded hole (14) and presses the side of the clamping gasket (321) facing away from the sealing ring (31).

4. The auxiliary junction box for explosion-proof motor according to claim 1, characterized in that: The sealing ring (31) is configured to have a porous structure; The bottom of the box seat (1) is provided with a threading hole (12) and a fixing hole (13), the threading hole (12) and the fixing hole (13) are connected to each other, and the diameter of the fixing hole (13) is larger than the diameter of the threading hole (12); The sealing ring (31) having a porous structure is arranged in the fixing hole (13); The cable (4) is connected to the connection terminal (11) after passing through the threading hole (12) and the sealing ring (31) with a porous structure from the outside of the box seat (1); The pressing portion (32) presses the sealing ring (31) into the fixing hole (13) to clamp the cable (4).

5. The auxiliary junction box for explosion-proof motor according to claim 4, characterized in that: The pressing portion (32) comprises a pressing gasket (321) and a pressing nut (322); An internal threaded hole (14) is provided on the inner side of the bottom of the box seat (1), and the internal threaded hole (14) is connected to the fixing hole (13); The compression gasket (321) is arranged on two opposite sides of the sealing ring (31); The clamping nut (322) is threadedly connected in the internal threaded hole (14) and presses one side of the clamping gasket (321) away from the sealing ring (31).

6. The auxiliary junction box for explosion-proof motor according to claim 1, characterized in that: The cable introduction clamping device further comprises a cable introduction portion (33), and the sealing ring (31) is configured to have a porous structure; The cable introduction portion (33) is detachably arranged at the bottom of the box seat (1); The sealing ring (31) with a porous structure is arranged between the cable introduction part (33) and the pressing part (32); the cable (4) passes through the pressing part (32), the sealing ring (31) with a porous structure and the cable introduction part (33) in sequence from the outside of the box seat (1) and is then connected to the connection terminal (11); The pressing portion (32) presses the sealing ring (31) between the cable introduction portion (33) and the pressing portion (32) to clamp the cable (4).

7. The auxiliary junction box for explosion-proof motor according to claim 6, characterized in that: The bottom of the box seat (1) is provided with a snap-in hole (15), and the cable lead-in portion (33) is snap-into the snap-in hole (15); The first end of the cable lead-in portion (33) located in the box seat (1) is fastened by a locking nut (34); The second end of the cable introduction portion (33) located outside the box seat (1) is fastened by the pressing portion (32).

8. The auxiliary junction box for explosion-proof motor according to claim 7, characterized in that: The pressing portion (32) comprises a pressing gasket (321) and a pressing nut (322); The compression gasket (321) is arranged on two opposite sides of the sealing ring (31); The clamping nut (322) is threadedly connected to the second end of the cable lead-in portion (33) and presses one side of the clamping gasket (321) away from the sealing ring (31).

9. The auxiliary junction box for explosion-proof motor according to any one of claims 1 to 8, characterized in that: The auxiliary junction box also includes a signal source introduction device (5), which is arranged on the side of the box seat (1) and is used for power supply introduction and signal extraction.

10. An explosion-proof motor, characterized in that: It comprises an auxiliary junction box for an explosion-proof motor as described in any one of claims 1 to 9.

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