High-voltage explosion-proof motor junction box

Abstract

The utility model provides a high-voltage explosion-proof type motor junction box, which relates to the technical field of motors and comprises a junction box seat, a junction bucket, a junction box cover matched with the junction box seat, a split seat and a compression explosion-proof assembly arranged on the split seat, the junction box cover is detachably mounted on the junction box seat, and the compression explosion-proof assembly is detachably mounted on the junction box seat. The split seat is connected between the junction box seat and the wiring bucket, the pressing explosion-proof assembly is used for pressing and fixing a cable passing through the split seat, and a wire outlet of the junction box seat is obliquely arranged, so that after the cable passes through the junction box seat to be obliquely led out, the cable is separated from the wiring bucket. And then the high-voltage explosion-proof motor junction box passes through the split seat and the wiring bucket in sequence. According to the utility model, wiring and motor maintenance related to wiring are facilitated for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a high-voltage flameproof motor junction box. Background Art

[0002] Flameproof motor junction boxes mainly include low-voltage flameproof motor junction boxes and high-voltage flameproof motor junction boxes. Flameproof motor junction boxes require frequent maintenance, especially for high-voltage flameproof motors, which require a high number of maintenance.

[0003] Currently, most flameproof motor junction boxes are integrated, and when disassembling for maintenance, it is difficult to separate cables of different phases for maintenance. For example, it is impossible to wear a three-finger cot to perform branching operations, which is inconvenient for motor maintenance. Utility Model Content

[0004] The problem to be solved by the utility model is that the current flameproof motor junction box is inconvenient to disassemble and split the wires, and is inconvenient to maintain the motor.

[0005] To solve the above problems, on the one hand, the utility model provides a high-voltage flameproof motor junction box, including a junction box seat, a junction box bucket and a junction box cover matched with the junction box seat, wherein the junction box cover is detachably mounted on the junction box seat, and also includes a split seat and a compression flameproof component arranged on the split seat, and also includes a split seat and a compression flameproof component arranged on the split seat, wherein the split seat is connected between the junction box seat and the junction box bucket, and the compression flameproof component is used to compress and fix the cable passing through the split seat, and the wire outlet of the junction box seat is inclined so that the cable passes through the split seat and the junction box bucket in sequence after being inclined through the junction box seat.

[0006] Optionally, the junction box seat includes a wiring cavity, an outlet cavity and a first flange, the inner end surface of the wiring cavity is provided with a terminal post, the junction box cover is arranged on the outer end surface of the wiring cavity, the outlet cavity is arranged on the outer peripheral wall of the wiring cavity and is inclined relative to the wiring cavity, and the first flange is arranged at one end of the outlet cavity away from the wiring cavity and is used to connect the split seat.

[0007] Optionally, the outlet cavity gradually inclines toward the end where the terminal is located in a direction away from the wiring cavity.

[0008] Optionally, a boss is provided on the junction box cover, an open groove is provided on the outer end surface of the junction cavity, and the boss is matched with the open groove.

[0009] Optionally, the outlet cavity is arranged obliquely at the bottom of the wiring cavity.

[0010] Optionally, the compression explosion-proof assembly includes an explosion-proof sealing ring arranged in the split seat, the explosion-proof sealing ring is compressed in the split seat by the wiring bucket, and the cable passes through the explosion-proof sealing ring and has an interference fit with the explosion-proof sealing ring.

[0011] Optionally, the split seat includes a split seat body, a second flange and an abutment portion which are fixedly connected in sequence, a stepped groove is provided in the split seat body, the explosion-proof sealing ring is embedded in the stepped groove, the abutment portion is used to be inserted into the wire outlet cavity, and the second flange is used to be connected to the wire outlet cavity.

[0012] Optionally, the first flange and the second flange are fixed by a fastener, and the fastener is passed through the bottom of the second flange to the first flange, and a blind hole cooperating with the fastener is provided at the bottom of the first flange.

[0013] Optionally, the junction box cover is spindle-shaped.

[0014] Optionally, the inner cavity of the outlet cavity is of a gradual type, wherein the inner cavity cross-section of the outlet cavity gradually decreases as it moves away from the wiring cavity.

[0015] Optionally, the wiring bucket includes a first connecting part and a bucket body, the first connecting part is fixed at the waist of the bucket body, the first connecting part is used to connect with the split seat, and the bucket body located at the top of the first connecting part cooperates with the stepped groove.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a high-voltage flameproof motor junction box, one end of the cable passes through the junction box seat, the split seat and the junction bucket in sequence, and the other end of the cable is fixed to the terminal post in the junction box seat. The arrangement of the split seat ensures that the cable is inclined to be connected, and a certain section of the cable is fixed by a compression flameproof component, so that the cable between the end of the cable and the node fixed by the compression flameproof component forms a turning radius, that is, the inclined connection and the fixing of the compression flameproof component together ensure that the cable above the node fixed by the compression flameproof component has a wider range of movement, compared with the traditional vertical line entry (or outlet), the cable outlet is changed from straight outlet to oblique outlet downward, and the junction box seat is detachably connected with a junction box cover. When wiring or maintenance related to wiring is carried out, the junction box cover is directly removed, and the cable is inclined to exit through the junction box seat. Combined with the situation that the node of the cable is fixed by the compression isolation component, the movable range of one end of the cable relative to the motor is larger, that is, the turning radius of the cable during installation or maintenance is increased, and cables of different phases can be separated from each other by a three-finger sleeve, which is convenient for users to connect wires and perform motor maintenance related to wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the main structure of a high-voltage flameproof motor junction box in an embodiment of the utility model is shown;

[0019] Figure 2 A three-dimensional structural schematic diagram of a junction box seat in an embodiment of the utility model is shown;

[0020] Figure 3 It shows a front view of the junction box seat in the embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of the split seat in the embodiment of the utility model is shown;

[0022] Figure 5 A cross-sectional view of a split seat in an embodiment of the utility model is shown;

[0023] Figure 6 The three-dimensional structure diagram of the wiring bucket in the embodiment of the utility model is shown. Figure 1 ;

[0024] Figure 7 The three-dimensional structure diagram of the wiring bucket in the embodiment of the utility model is shown. Figure 2 .

[0025] Description of reference numerals:

[0026] 1-junction box cover; 11-boss; 2-junction box seat; 21-junction chamber; 22-outlet chamber; 23-first flange; 3-split seat; 31-split seat body; 312-step groove; 32-second flange; 33-butt portion; 34-second connecting portion; 4-junction bucket; 41-first connecting portion; 42-bucket body; 5-terminal post; 6-explosion-proof sealing ring. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] It should be noted that in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0030] Reference Figure 1 As shown, the embodiment of the utility model provides a high-voltage flameproof motor junction box;

[0031] The high-voltage flameproof motor junction box includes a junction box seat 2, a wiring bucket 4 and a junction box cover 1 matched with the junction box seat 2, wherein the junction box cover 1 is detachably mounted on the junction box seat 2, and further includes a split seat 3 and a compression flameproof assembly arranged on the split seat 3, wherein the split seat 3 is connected between the junction box seat 2 and the wiring bucket 4, and the compression flameproof assembly is used to compress and fix the cable passing through the split seat 3, and the outlet of the junction box seat 2 is arranged at an angle so that the cable passes through the split seat 3 and the wiring bucket 4 in sequence after being inclined through the junction box seat 2.

[0032] When used in practice, the junction box seat 2 is set based on the outlet position of the motor, and is generally fixed on the top of the motor casing; one end of the cable is connected to the power supply and grounding after passing through the junction box seat 2, the split seat 3 and the wiring bucket 4 in sequence, and the other end of the cable is matched with the wiring position of the motor in the junction box seat 2 (that is, the subsequent terminal 5) to complete the wiring of the main cable of the motor, and realize the power supply and grounding of the motor. The material of the junction box is a cast iron junction box, and the setting of the split seat 3 ensures that the state of the cable after the inclined outlet is maintained, and the cable (located in the compression flameproof component) A certain section is fixed by pressing the flameproof component, so that when the motor needs to be repaired, the end of the cable located in the junction box seat 2 is released from the fixed connection with the wiring position of the motor, and the cable forms a turning radius between the end of the cable located in the junction box seat 2 and the node fixed with the pressing flameproof component (at the same time, the junction box seat 2 and the split seat 3 should allow appropriate room for the cable to move), that is, the inclined outlet and the fixing of the pressing flameproof component, together ensure that the cable above the node fixed with the pressing flameproof component (that is, from the node to the wiring position) has a wider range of movement and a longer line length.

[0033] exist Figure 1 It can be clearly seen that the axis of the outlet of the junction box seat 2 (i.e. the axis of the outlet cavity 22) and the axis of the wiring cavity 21 (i.e. the axis of the terminal 5) are not vertical, but at a certain angle, that is, the outlet of the junction box seat 2 is tilted to ensure that the outlet is tilted relative to the wiring position of the motor. Compared with the traditional vertical outlet, the cable outlet is changed from vertical (such as vertically downward) to inclined (such as inclined downward), and the length of the inclined outlet is longer than the length of the vertical outlet. According to the above, the existing vertical outlet generally exists in a non-split junction box, and the cable inside the junction box is difficult to move. In the utility model, a certain section of the cable extending out of the junction box seat 2 is fixed by pressing the flameproof component, and the part of the cable outlet is changed from vertical (such as vertically downward) to inclined (such as inclined downward), thereby The cable retained in the junction box seat 2 is longer. When the end of the cable is released from the fixed connection with the wiring position of the motor in the junction box seat 2 and becomes a free end, the free end of the cable can rotate relative to the cable node fixed by the compression flameproof component. For example, the free end can move toward the end where the junction box seat 2 is located to facilitate maintenance, thereby forming a rotatable turning radius for the cable between the free end and the node fixed by the compression flameproof component. The junction box seat 2 is detachably connected with a junction box cover 1. When wiring or wiring-related maintenance is performed, the junction box cover 1 can be directly removed. Since the free end of the cable has a larger movable range, the turning radius of the cable during installation or maintenance is increased, and cables of different phases can be separated from each other using a three-finger sleeve, which is convenient for users to connect wires and perform wiring-related motor maintenance.

[0034] like Figure 2 and Figure 3As shown, as an optional embodiment of the utility model, the junction box seat 2 includes a wiring cavity 21, an outlet cavity 22 and a first flange 23, the inner end surface of the wiring cavity 21 is provided with a terminal 5, the junction box cover 1 is arranged on the outer end surface of the wiring cavity 21, the outlet cavity 22 is arranged on the outer peripheral wall of the wiring cavity 21 and is arranged obliquely relative to the wiring cavity 21, and the first flange 23 is arranged at one end of the outlet cavity 22 away from the wiring cavity 21, and is used to connect the split seat 3. .

[0035] Specifically, the wiring cavity 21 forms a protective space for accommodating the cable end and the terminal 5 to maintain a stable connection state. The outlet cavity 22 is also used for the outlet of the other end of the cable and to ensure a moderate activity space for the cable. The first flange 23 is used to fix the split seat 3. The junction box seat 2 as a whole ensures the protection of the cable connection state. The outlet cavity 22 is inclined relative to the wiring cavity 21. Specifically, as shown in 1 and Figure 2 The outlet cavity 22 is arranged obliquely at the bottom of the wiring cavity 21.

[0036] Specifically, when the outlet cavity 22 is arranged at an angle, the direction of the outlet cavity 22 is further limited, that is, the cable is inclined to pass through the junction box seat 2. In fact, the central axis of the junction box seat 2 is not perpendicular to the bottom of the junction box cover 1 (the tangent plane of the curved surface), so that the outlet cavity 22 can be arranged at an angle at the bottom of the wiring cavity 21. If viewed from the direction of the wiring cavity 21, the outlet cavity 22 is inclined in an arbitrary direction.

[0037] As an optional embodiment of the present invention, Figure 1 As shown, the outlet cavity 22 gradually inclines toward the end where the terminal 5 is located in the direction away from the wiring cavity 21. The “end where the terminal 5 is located” refers to the end of the wiring cavity 21 where the terminal 5 is provided.

[0038] Since one end of the cable is connected to the terminal, when the other end of the cable gradually tilts toward the end where the terminal is located (such as tilting downward), the cable bending curvature in the terminal box seat 2 can be made larger, and the cable retained in the terminal box seat 2 is longer, which is more conducive to user wiring and wiring-related motor maintenance.

[0039] As an optional embodiment of the present utility model, a boss 11 is provided on the junction box cover 1, and an open groove is provided on the outer end surface of the wiring cavity 21, and the boss 11 is matched with the open groove.

[0040] Specifically, compared with the existing wiring structure, the cooperation between the boss 11 and the open groove (the outer circle of the boss 11 fits with the inner wall of the open groove) changes the seal from one to two. The boss 11 actually forms a seal deep into the outer end surface of the junction box cover 1. In addition, the junction box cover 1 is fixed to the outer end surface of the junction box seat 2 by bolts, forming a total of two seals, which further enhances the sealing effect. A sealing ring is generally provided at the contact between the junction box cover 1 and the outer end surface.

[0041] like Figure 1 As an optional embodiment of the utility model, the compression explosion-proof component includes an explosion-proof sealing ring (6) arranged in the split seat (3), the explosion-proof sealing ring (6) is compressed in the split seat (3) by the wiring bucket (4), the cable passes through the explosion-proof sealing ring (6) and has an interference fit with the explosion-proof sealing ring (6), the cable cooperates with the explosion-proof sealing ring 6, the cable passed through the explosion-proof sealing ring 6, the hole at the center of the explosion-proof sealing ring 6 and the cable can have an interference fit, and the hole at the center of the explosion-proof sealing ring 6 is generally further strengthened by applying glue to fix the cable.

[0042] The explosion-proof sealing ring 6 is generally cylindrical, and the cable is located in a hole at the center of the explosion-proof sealing ring 6. The area within the radius of the hole is the movable range of the cable.

[0043] The explosion-proof sealing ring 6 is fixed along with the fixing of the wiring bucket 4, that is, after the fixing of the wiring bucket 4 is completed, the explosion-proof sealing ring 6 is also fixed. Therefore, the explosion-proof sealing ring 6 is fixed by relying on the fixing of the wiring bucket 4 and does not need to be fixed separately. The explosion-proof sealing ring 6 and the cable inlet are compressed and sealed to play a role of explosion-proof.

[0044] like Figure 6 and Figure 7 As shown, the wiring bucket 4 includes a first connecting portion 41 and a bucket body 42, the first connecting portion 41 is fixed at the waist of the bucket body 42, the first connecting portion 41 is used to connect with the split seat 3, and the bucket body 42 located at the top of the first connecting portion 41 cooperates with the stepped groove 312.

[0045] For the wiring bucket 4, the height of the bucket body 42 located at the top of the first connecting portion 41 is greater than the height of the bucket body 42 located at the bottom of the first connecting portion 41, that is, the portion of the bucket body 42 entering the first connecting portion 41 of the stepped groove 312 is larger than the portion exposed to the outside, so that the installation of the wiring bucket 4 can be more secure.

[0046] Such as 1. Figure 4 and Figure 5As shown, the split seat 3 includes a split seat body 31, a second flange 32 and an abutment portion 33 which are fixedly connected in sequence, the split seat body 31 is provided with a stepped groove 312, the explosion-proof sealing ring 6 is embedded in the stepped groove 312, the abutment portion 33 is used to be inserted into the outlet cavity 22, and the second flange 32 is used to be connected to the outlet cavity 22.

[0047] The split seat 3 also includes a second connecting portion 34, which is arranged at the bottom of the split seat body 31. The second connecting portion 34 is provided with a threaded hole. The user installs a screw in the threaded hole to fix the split seat 3 and the wiring bucket 4. The first connecting portion 41 and the second connecting portion 34 are correspondingly provided with fixing holes, and the fixing holes are used to install connecting parts (including bolts, screws, etc.) to complete the fixing of the wiring bucket 4 to the bottom of the split seat 3.

[0048] The stepped groove 312 penetrates the abutting portion 33, the second flange 32 and the split seat body 31 from top to bottom respectively, and the abutting portion 33 enters the groove at the top of the junction box seat 2, thereby achieving preliminary positioning, and accurately positioning the hole between the first flange 23 and the second flange 32. The stepped groove 312 located on the split seat body 31 includes a top groove body, an intermediate groove body and a bottom groove body, wherein the intermediate groove body connects the top groove body and the bottom groove body, and the radii of the three are different from each other, and the radius of the intermediate groove body is the smallest. The top groove body is used to set a waterproof plug, and the cable passes through the waterproof plug, and the explosion-proof sealing ring 6 is provided in the bottom groove body. When the bucket body 42 at the top of the first connecting part 41 enters the top groove body, the explosion-proof sealing ring 6 is encapsulated in the bottom groove body, and the top of the bucket body 42 abuts against the explosion-proof sealing ring 6. An elastic gasket can also be provided between the top of the explosion-proof sealing ring 6 and the top wall of the bottom groove body to enhance the sealing effect. The explosion-proof sealing ring 6 is generally made of rubber material and can be directly purchased on the market.

[0049] The first flange 23 and the second flange 32 are fixed by fasteners. The fasteners are passed through the bottom of the second flange 32 to the first flange 23. The bottom of the first flange 23 is provided with a blind hole that cooperates with the fasteners.

[0050] Specifically, the fasteners include bolts, rivets, welding nails, etc. The fasteners are passed from the bottom of the second flange 32 to the first flange 23, that is, relative to the placement direction of the motor, the fasteners are installed from the bottom to the top to complete the fixation, thereby reducing the probability of water ingress. Compared with the through-type fixing method in the prior art, the probability of water entering the junction box is reduced, thereby reducing the probability of water entering the motor cavity from the junction box, thereby ensuring the safe operation of the motor.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, as an optional embodiment of the utility model, the junction box cover 1 is spindle-shaped, and / or the inner cavity of the outlet cavity 22 is gradient-shaped, wherein the inner cavity cross-section of the outlet cavity 22 gradually decreases as it moves away from the wiring cavity 21.

[0052] Specifically, when the junction box cover 1 is spindle-shaped, its cross-section is small at both ends and large in the middle. Compared with the circular junction box cover of the traditional motor, the four corners of the interior (spindle-shaped) of this wiring cavity 21 are provided with reinforcing ribs, and the reinforced parts connect the inner end face and the side wall, which can better withstand the action of external forces, thereby playing a better explosion-proof role; when the inner cavity radius of the outlet cavity 22 also decreases as it moves away from the wiring cavity 21, that is, its top surface is larger and the bottom surface is smaller, it is beneficial to fix the split seat 3 and the wiring bucket 4 along the first flange 23, thereby achieving a smaller "channel" area and making better use of waterproofing.

[0053] The utility model discloses that the terminal box seat 2 is connected with the split seat 3, that is, the terminal box is a split terminal box, which can meet the needs of user disassembly and maintenance. The existing terminal box cannot be disassembled with three-finger sleeves after the user has connected the wires, which is inconvenient for motor maintenance. The split seat 3 of the utility model can be disassembled from between the terminal box seat 2 and the terminal bucket 4. The split seat 3 and the terminal box seat 2 and the terminal bucket 4 are all detachably connected. During the disassembly process, the cable and the split seat 3 can be separated from the motor terminal box seat 2 together, which is convenient for installation and maintenance of the motor body. Through this utility model, the appearance of the high-voltage motor terminal box can be changed, the shape of the terminal box cover 1 and the terminal box seat 2 can be changed, and at the same time, the connection mode of the terminal box seat 2 and the split seat 3 can be changed to the lower mounting bolt, so as to avoid water corrosion in the installation threaded hole and reduce the probability of water entering the motor. Under the condition of meeting the explosion-proof requirements, the structure of the terminal box cover 1 and the terminal box seat 2 can also solve the problem that the cable cannot be disassembled and assembled by the user during maintenance, and can increase the cable bending radius, increase the size of the wiring port, and ensure the convenience of operation and maintenance.

[0054] The above description is only a specific embodiment of the utility model, so that those skilled in the art can understand or implement the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the utility model described herein.

[0055] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A high-voltage flameproof motor junction box, comprising a junction box seat (2), a junction box (4) and a junction box cover (1) matched with the junction box seat (2), characterized in that: The invention also comprises a split seat (3) and a compression flameproof assembly arranged on the split seat (3); the junction box cover (1) is detachably mounted on the junction box seat (2); the split seat (3) is connected between the junction box seat (2) and the junction box bucket (4); the compression flameproof assembly is used to compress and fix the cable passing through the split seat (3); the outlet of the junction box seat (2) is arranged obliquely so that the cable passes through the junction box seat (2) and then passes through the split seat (3), the compression flameproof assembly and the junction box bucket (4) in sequence.

2. The high voltage flameproof motor junction box according to claim 1, characterized in that: The junction box seat (2) comprises a wiring cavity (21), an outlet cavity (22) and a first flange (23); the inner end surface of the wiring cavity (21) is provided with a wiring post (5); the junction box cover (1) is arranged on the outer end surface of the wiring cavity (21); the outlet cavity (22) is arranged on the outer peripheral wall of the wiring cavity (21) and is inclined relative to the wiring cavity (21); the first flange (23) is arranged at one end of the outlet cavity (22) away from the wiring cavity (21) and is used for connecting the split seat (3).

3. The high voltage flameproof motor junction box according to claim 2 is characterized in that: The outlet cavity (22) gradually inclines toward the end where the terminal post (5) is located in a direction away from the terminal cavity (21).

4. The high voltage flameproof motor junction box according to claim 2, characterized in that: The outlet cavity (22) is arranged obliquely at the bottom of the wiring cavity (21).

5. The high voltage flameproof motor junction box according to any one of claims 2 to 4, characterized in that: The compression flameproof assembly comprises an explosion-proof sealing ring (6) arranged in the split seat (3); the explosion-proof sealing ring (6) is compressed in the split seat (3) by the wiring bucket (4); the cable passes through the explosion-proof sealing ring (6) and is interference-fitted with the explosion-proof sealing ring (6).

6. The high voltage flameproof motor junction box according to claim 5, characterized in that: The split seat (3) comprises a split seat body (31), a second flange (32) and an abutment portion (33) which are fixedly connected in sequence; a stepped groove (312) is provided in the split seat body (31); the explosion-proof sealing ring (6) is embedded in the stepped groove (312); the abutment portion (33) is used to be inserted into the outlet cavity (22); and the second flange (32) is used to be connected to the outlet cavity (22).

7. The high voltage flameproof motor junction box according to claim 6, characterized in that: The first flange (23) and the second flange (32) are fixed by a fastener, and the fastener is passed through the bottom of the second flange (32) to the first flange (23), and a blind hole matching the fastener is provided at the bottom of the first flange (23).

8. The high voltage flameproof motor junction box according to any one of claims 1 to 4, characterized in that: The junction box cover (1) is spindle-shaped.

9. The high voltage flameproof motor junction box according to any one of claims 2 to 4, characterized in that: The inner cavity of the outlet cavity (22) is of a gradual type, wherein the inner cavity cross-section of the outlet cavity (22) gradually decreases as it moves away from the wiring cavity (21).

10. The high voltage flameproof motor junction box according to claim 6, characterized in that: The wiring bucket (4) comprises a first connecting portion (41) and a bucket body (42), wherein the first connecting portion (41) is fixed at the waist of the bucket body (42), the first connecting portion (41) is used to connect with the split seat (3), and the bucket body (42) located at the top of the first connecting portion (41) cooperates with the stepped groove (312).

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