Split type explosion-proof variable frequency motor

Abstract

A split type explosion-proof variable frequency motor is characterized in that an explosion-proof box body comprises an explosion-proof shell and an explosion-proof cover plate which is detachably connected to the top of the explosion-proof shell, a containing cavity is formed in the explosion-proof shell, a frequency conversion assembly and a capacitor machine core assembly are arranged in the containing cavity, a plurality of connecting openings are formed in the explosion-proof shell, and the frequency conversion assembly is connected with the capacitor machine core assembly through the connecting openings. A joint plate is arranged on the joint opening; the motor comprises a motor shell and a motor base, and the motor base is correspondingly arranged above the joint plate and detachably connected with the explosion-proof shell. The assembly structure is optimized through the detachable design of the motor and the explosion-proof box body, the motor and the explosion-proof box body can be disassembled and transported in a split manner in a narrow space in a mining scene, the motor and the explosion-proof box body can be disassembled quickly during maintenance, and the maintenance cost is reduced; and through the special design of the explosion-proof joint surface, the invasion of explosive gas and dust and the propagation of explosion flames under the mine are effectively blocked, so that the operation safety of operators is protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor field, concretely relates to a split type anti -explosion frequency conversion motor. BACKGROUND

[0002] The motor is a kind of device for converting electric energy into mechanical energy, and its performance is directly related to the running efficiency and stability of mechanical system, and modern industry has been used in extensive field, especially in mine and other special environments.

[0003] Traditional motor integral motor is bulky, difficult to adapt to the narrow space of mine, and is time-consuming and laborious to carry and install, and the cost is high, and the integral design structure is complex, and it is difficult to maintain;And poor ventilation condition in mine, poor heat dissipation of integral motor, easy to overheat, reduce operating efficiency, even cause failure, once a module is damaged, needs to be disassembled and repaired, time-consuming and laborious, and the production progress is affected;And the environment under mine is complex, there are a large amount of explosive gas mixtures such as gas and coal dust, once the equipment fails and causes explosion, it will greatly endanger the safety of operating personnel. CONTENT OF UTILITY MODEL

[0004] In view of the deficiencies of prior art, the utility model aims at providing a split type anti -explosion frequency conversion motor to solve the existing problems.

[0005] In order to realize the above-mentioned purpose, the utility model is realized through the following technical scheme: a split type anti -explosion frequency conversion motor, its structure includes explosion-proof box body and motor installed on the explosion-proof box body;

[0006] The explosion-proof box body includes an explosion-proof shell and an explosion-proof cover plate detachably connected to the top of the explosion-proof shell, the explosion-proof shell has a containing cavity, the containing cavity is provided with a frequency conversion assembly and a capacitor movement core assembly, a plurality of joint openings are formed in the explosion-proof shell, and a joint plate is arranged on the joint opening and fixed with the frequency conversion assembly and the capacitor movement core assembly;

[0007] The motor includes a motor shell arranged at the bottom of the explosion-proof shell and a motor base integrally connected to the bottom of the motor shell, the motor base is arranged above the joint plate and detachably connected with the explosion-proof shell, and the frequency conversion assembly and the capacitor movement core assembly are communicated with the inside of the motor through the joint plate;

[0008] Among them, the explosion-proof shell is also provided with a plurality of explosion-proof cable leaders for connecting the internal and external lines, and a plurality of explosion-proof joint surfaces are formed between the explosion-proof shell and the explosion-proof cover plate.

[0009] As a further improvement, the motor includes a motor shell and mounting covers detachably connected to both ends of the motor shell, and a rotating shaft and a stator-rotor assembly matched with the rotating shaft are arranged between the mounting covers.

[0010] As a further improvement, a plurality of first wiring holes are formed on the joint plate, and a second wiring hole is formed on the bottom of the motor base, and the variable frequency assembly and the capacitor core assembly are connected with the stator-rotor assembly through the first wiring hole and the second wiring hole.

[0011] As a further improvement, the motor base is fixed with the explosion-proof shell through bolts, and the joint surfaces of the two form an explosion-proof joint surface.

[0012] As a further improvement, the bottom of the explosion-proof cable lead-in device is provided with a lead-in device fixing plate, and the lead-in device fixing plate is provided with bolts for detachable fixing with the explosion-proof shell, and the joint surfaces of the two form an explosion-proof joint surface.

[0013] As a further improvement, at least one separation fixing plate is arranged in the explosion-proof shell, and the separation fixing plate separates the accommodating cavity into a wiring cavity and a variable frequency cavity.

[0014] As a further improvement, the separation fixing plate comprises a separation plate arranged vertically and a fixing plate arranged horizontally on the top of the separation plate, and a plurality of explosion-proof wall-penetrating terminals are arranged horizontally and spaced apart on the separation plate.

[0015] As a further improvement, the separation plate and the explosion-proof shell are both provided with wall-penetrating terminal positive and negative poles, the wall-penetrating terminal positive and negative poles respectively extend into the wiring cavity and out of the explosion-proof shell, and are connected with the explosion-proof cable lead-in device and the motor.

[0016] As a further improvement, the explosion-proof cover plate comprises a first cover plate and a second cover plate which are respectively fixed and installed on the top of the wiring cavity and the variable frequency cavity through bolts, and the two respectively joint with the explosion-proof shell and the top of the fixing plate to form an explosion-proof joint surface.

[0017] As a further improvement, a rubber ring is arranged between the explosion-proof joint surfaces to improve the sealing performance.

[0018] The split type explosion-proof motor has the advantages that: the detachable design of the motor and the explosion-proof box body optimizes the assembly structure and simplifies the disassembly process, the motor and the explosion-proof box body can be disassembled and transported in a split manner in a narrow space in a mining scene, the production progress is reasonably allocated, the motor and the explosion-proof box body can be quickly disassembled during maintenance, the mine operation cost is reduced, and the maintenance cost and replacement frequency of the equipment are reduced; and through the special design of the explosion-proof joint surface, the explosion-proof shell and the joint surface can withstand the pressure generated by the internal explosion, prevent the shell from being broken, effectively block the invasion of explosive gas and dust under the mine, or prevent the explosion flame in the equipment from spreading to the external environment, thereby protecting the operation safety of the operating personnel. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings:

[0020] Figure 1 Figure 2 is a schematic diagram of the overall structure of the motor of the present application; Figure 1 ;

[0021] Figure 2 Figure 3 is a schematic diagram of a cross-section of the motor of the present application;

[0022] Figure 3 Figure 4 is a schematic diagram of the overall structure of the motor of the present application; Figure 1 two;

[0023] Figure 4 Figure 5 is a schematic diagram of the structure of a cross-section of the present application; Figure 3 B-B;

[0024] Figure 5 Figure 6 is a schematic diagram of a partial view of the explosion-proof box of the present application;

[0025] Figure 6 Figure 7 is a schematic diagram of a partial view of the motor of the present application;

[0026] Figure 7 Figure 8 is a schematic diagram of a partial cross-section of the motor of the present application.

[0027] Explanation of the main reference numerals:

[0028] 1, explosion-proof box body;

[0029] 10, explosion-proof cable lead-in device; 11, explosion-proof housing;

[0030] 12, explosion-proof cover plate; 121, first cover plate; 122, second cover plate;

[0031] 13, accommodating cavity;

[0032] 131, wiring cavity; 132, frequency conversion cavity;

[0033] 14, frequency conversion assembly; 15, capacitor movement assembly;

[0034] 16, partitioning and fixing plate;

[0035] 161, partitioning plate; 162, fixing plate; 163, explosion-proof wall-penetrating terminal; 164, positive and negative wall-penetrating terminals;

[0036] 17, joint opening;

[0037] 18, joint plate; 181, first wiring hole; 182, second wiring hole;

[0038] 19, lead-in device fixing plate;

[0039] 2. motor;

[0040] 21. motor housing; 22. mounting cover; 23. rotating shaft; 24. stator-rotor assembly; 25. motor base;

[0041] 30. explosion-proof joint surface; 31. rubber ring. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model will be further described in combination with specific embodiments.

[0043] EMBODIMENT

[0044] Figure 1 The overall structure of the motor of the embodiment of the utility model Figure 1 , Figure 2 The cross-sectional view of the motor of the embodiment of the utility model, as shown in the drawings, will be described in detail below. Figures 1-2 The structure of the split type explosion-proof variable frequency motor of the embodiment of the utility model, which comprises an explosion-proof box body 1 and a motor 2 mounted on the explosion-proof box body 1.

[0045] The explosion-proof box body 1 comprises an explosion-proof housing 11 and an explosion-proof cover plate 12 detachably connected to the top of the explosion-proof housing 11, the explosion-proof housing 11 has a receiving cavity 13 inside, the receiving cavity 13 is provided with a variable frequency assembly 14 and a capacitor movement assembly 15, the output frequency and voltage can be adjusted in real time according to the needs of the production process, so as to realize the smooth speed regulation of the motor, a plurality of joint openings 17 are formed on the explosion-proof housing 11, and a joint plate 18 fixed with the variable frequency assembly 14 and the capacitor movement assembly 15 is arranged on the joint opening 17.

[0046] The motor 2 comprises a motor housing 21 arranged at the bottom of the explosion-proof housing 11 and a motor base 25 integrally connected to the bottom of the motor housing 21, the motor base 25 is arranged above the joint plate 18 and is detachably connected with the explosion-proof housing 11, through the detachable connection of the split type, the variable frequency assembly 14 and the capacitor movement assembly 15 are communicated with the inside of the motor 2 through the joint plate 18.

[0047] The explosion-proof housing 11 is also provided with a plurality of explosion-proof cable lead-in devices 10 for connecting the internal and external lines, the internal and external lines of the explosion-proof housing 11 are connected through the plurality of explosion-proof cable lead-in devices 10, and the external power supply is connected, so that the motor can be powered on, a plurality of explosion-proof joints 30 are formed between the explosion-proof housing 11 and the explosion-proof cover plate 12, due to the complex environment of the mine, there are a large amount of gas, coal dust and other explosive gas mixtures, therefore, through the special design of the explosion-proof joint, the gap, width and surface roughness of the joint are controlled, so that the flame and high-temperature gas are rapidly cooled and extinguished when passing through the joint gap, thereby preventing the explosion from spreading to the explosive gas mixture around the shell, and avoiding the explosion accident of the external environment.

[0048] Please refer to Figure 2 , the motor 2 comprises a motor housing 21 and mounting covers 22 detachably connected to both ends of the motor housing 21, and a rotating shaft 23 and a stator-rotor assembly 24 matched with the rotating shaft 23 are arranged between the mounting covers 22 for motor operation.

[0049] Please refer to Figure 2 , 5 , through the split design of the motor 2 and the explosion-proof box body 1, the operator can easily assemble when using, and in order to communicate the circuit of the explosion-proof box body 1 and the motor 2, a plurality of first wiring holes 181 are formed on the joint plate 18, and the bottom of the motor base 25 is provided with a plurality of second wiring holes 182 matched with the first wiring holes 181, and the lines of the frequency conversion assembly 14 and the capacitor movement core assembly 15 are connected with the stator-rotor assembly 24 through the first wiring holes 181 and the second wiring holes 182, so as to ensure the normal operation of the motor.

[0050] Please refer to Figure 2 , Figures 5-6 , the motor base 25 and the explosion-proof housing 11 are fixed by bolts, and the bolts are uniformly distributed at the edges of the motor base 25, so that the motor 2 and the explosion-proof box body 1 can be disassembled and assembled, the integrated motor 2 and the explosion-proof box body 1 occupy a large space, and the space is narrow in the mine scene, so it is not convenient to use or transport, therefore, the motor 2 and the explosion-proof box body 1 are disassembled and transported separately, and then assembled for use, the space layout and actual demand can be reasonably allocated, which is suitable for the narrow environment of the mine scene, and the joint surface of the motor base 25 and the explosion-proof housing 11 forms an explosion-proof joint surface 30, which prevents the external explosive gas from entering the internal equipment, prevents the sparks and high temperature generated in the internal equipment from igniting the external gas, avoids the explosion accident of the mine, and in addition, the frequency converter and the motor in the split type scheme can be selected and configured according to the actual demand, which can better meet the individual needs of different coal mining enterprises.

[0051] Please refer to Figures 1-6 , the bottom of the several said explosion-proof cable lead-in device 10 is provided with a lead-in device fixing plate 19, the lead-in device fixing plate 19 is provided with a bolt and is detachably fixed with the explosion-proof shell 11, the explosion-proof cable lead-in device 10 is also optimized to be detachable design, the transportation convenience is improved, it is more suitable for narrow space environment in mine scene, after the transportation of the split parts is completed, then assemble, the junction surface of the lead-in device fixing plate 19 and the explosion-proof shell 11 forms an explosion-proof junction surface 30, prevents the external explosive gas from entering the equipment interior, prevents the spark, high temperature of the equipment interior from igniting the external gas, avoids the mine explosion accident.

[0052] Please refer to Figure 2 , the explosion-proof shell 11 is provided with at least one separation fixing plate 16, preferably one in the embodiment, the separation fixing plate 16 divides the accommodation cavity 13 into a wiring cavity 131 and a frequency conversion cavity 132, the wiring cavity 131 is connected with the inside and outside line or cable through the explosion-proof cable lead-in device 10, and the frequency conversion cavity 132 is mainly used for installing the frequency conversion assembly 14, the capacitor movement core assembly 15 and other core components for adjusting and controlling the motor work.

[0053] It should be known that the side where the explosion-proof box body 1 is located is defined as the upper side, the motor 2 is the lower side, the wiring cavity 131 is the front side, and the frequency conversion cavity 132 is the rear side, that is, in the embodiment, the motor 2 is located on the lower side of the explosion-proof box body 1, and the wiring cavity 131 is located on the front side of the frequency conversion cavity 132; it should also be known that when the explosion-proof junction surface is formed, the three parameters affecting the explosion-proof ability are L, I and ic, wherein L is the effective width of the plane explosion-proof surface junction, I is the width from the inside of the shell to the inside of the screw hole, and ic is the gap of the explosion-proof surface.

[0054] Please refer to Figures 2-3 , the separation fixing plate 16 includes a separation plate 161 vertically arranged in the accommodation cavity 13, and the separation plate 161 mainly divides the accommodation cavity 13 into front and back, a fixing plate 162 is horizontally arranged on the top of the separation plate 161, the width of the fixing plate 162 is greater than that of the separation plate 161, and the fixing plate 162 is mainly installed and connected with the top explosion-proof cover plate 12, a plurality of explosion-proof wall-penetrating terminals 163 are horizontally and spaced apart on the separation plate 161, the explosion-proof wall-penetrating terminals 163 are of different types according to actual needs, and the explosion-proof wall-penetrating terminals 163 are threadedly connected with the separation plate 161 and used for connecting the line of the wiring cavity 131 and the frequency conversion cavity 132.

[0055] Please refer to Figure 2The partition plate 161 is also horizontally provided with the positive and negative wall-through terminals 164. In the embodiment, the positive and negative wall-through terminals 164 are fixedly installed at the bottom of the frequency conversion cavity 132 with one end extending into the frequency conversion cavity 132 and the other end extending into the wiring cavity 131 and connected with the explosion-proof cable lead-in device 10.

[0056] Please refer to Figure 2 The frequency conversion cavity 132 is vertically provided with the positive and negative wall-through terminals 164. In the embodiment, one end of the positive and negative wall-through terminals 164 is connected with the internal frequency conversion core assembly and fixedly installed at the bottom of the explosion-proof housing 11 through the setting bolt, and the other end extends out of the explosion-proof housing 11 and is connected with the motor housing 21.

[0057] Please refer to Figures 1-4 In the embodiment, the explosion-proof cable lead-in device 10 is preferably four, which are divided into two sizes, two relatively small explosion-proof cable lead-in devices 10 of the same size are arranged in the middle of two large explosion-proof cable lead-in devices 10. The four explosion-proof cable lead-in devices 10 are detachably fixed with the explosion-proof housing 11 through the setting bolt on the lead-in device fixing plate 19, and the joint surface between the explosion-proof cable lead-in device 10 and the explosion-proof housing 11 forms an explosion-proof joint surface 30. The explosion-proof ability is improved through the explosion-proof joint surface 30 to prevent equipment damage.

[0058] Please refer to Figure 1 and Figure 7 The explosion-proof cover plate 12 includes the first cover plate 121 and the second cover plate 122 which are respectively arranged at the top of the wiring cavity 131 and the frequency conversion cavity 132, and are fixedly installed through the setting bolt. The first cover plate 121 and the second cover plate 122 are respectively connected with the explosion-proof housing 11 and the top of the fixing plate 162 to form the explosion-proof joint surface 30. The explosion-proof ability is improved through the explosion-proof joint surface 30 to prevent equipment damage. Please refer to Figure 1 For example, the first cover plate 121 and the front side joint surface A1 of the explosion-proof housing 11, and the second cover plate 122 and the rear side joint surface A2 of the explosion-proof housing 11, the parameters of the explosion-proof joint surface are A1 (L: 35, I: 9.5, ic: 0.2) and A2 (L: 35, I: 9.5, ic: 0.2).

[0059] Please refer to Figures 1-7In the embodiment, the bolt is used between the explosion-proof joint surfaces 30, the explosion-proof cable lead-in device 10 is simply disassembled and assembled, the operator is more convenient to disassemble when positioning and maintaining, the maintenance efficiency is improved, the personnel cost is reduced, the rubber ring 31 is arranged between the explosion-proof joint surfaces 30, the four explosion-proof cable lead-in devices 10 are arranged on the explosion-proof shell 11, the sealing ring groove is arranged at the bottom of the wiring cavity 131 of the explosion-proof shell 11 corresponding to the explosion-proof cable lead-in device 10, and the rubber ring of different specifications is arranged in the sealing ring groove, so that the sealing property is improved.

[0060] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0061] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A split type explosion-proof variable frequency motor, characterized in that, The structure comprises an explosion-proof box body (1) and a motor (2) mounted on the explosion-proof box body (1); The explosion-proof box body (1) comprises an explosion-proof shell (11) and an explosion-proof cover plate (12) detachably connected to the top of the explosion-proof shell (11), the explosion-proof shell (11) has a containing cavity (13) therein, the containing cavity (13) is provided with a frequency conversion assembly (14) and a capacitor movement core assembly (15), a plurality of joint openings (17) are formed in the explosion-proof shell (11), and a joint plate (18) fixed with the frequency conversion assembly (14) and the capacitor movement core assembly (15) is arranged on the joint opening (17). The motor (2) comprises a motor shell (21) arranged at the bottom of the explosion-proof shell (11) and a motor base (25) integrally connected to the bottom of the motor shell (21), the motor base (25) is arranged above the joint plate (18) and is detachably connected with the explosion-proof shell (11), and the frequency conversion assembly (14) and the capacitor movement core assembly (15) are in communication with the inside of the motor (2) through the joint plate (18). The explosion-proof shell (11) is further provided with a plurality of explosion-proof cable lead-in devices (10) for connecting the internal and external lines, and a plurality of explosion-proof joint surfaces (30) are formed between the explosion-proof shell (11) and the explosion-proof cover plate (12).

2. The split type explosion-proof variable frequency motor according to claim 1, characterized in that: The motor (2) comprises a motor shell (21) and mounting covers (22) detachably connected to the two ends of the motor shell (21), and a rotating shaft (23) and a stator-rotor assembly (24) matched with the rotating shaft (23) are arranged between the mounting covers (22).

3. The split type explosion-proof variable frequency motor according to claim 2, characterized in that: A plurality of first wire holes (181) are formed in the joint plate (18), and a second wire hole (182) is arranged at the bottom of the motor base (25), and the frequency conversion assembly (14) and the capacitor movement core assembly (15) are in communication with the stator-rotor assembly (24) through the first wire hole (181) and the second wire hole (182).

4. The split type explosion-proof variable frequency motor according to claim 3, characterized in that: The motor base (25) is fixed to the explosion-proof shell (11) by bolts, and the joint surface of the two forms an explosion-proof joint surface (30).

5. The split explosion-proof variable frequency motor of claim 4, wherein: A plurality of explosion-proof cable lead-in devices (10) are arranged at the bottom of the explosion-proof shell (11), and a lead-in device fixing plate (19) is arranged on the explosion-proof shell (11), the lead-in device fixing plate (19) is detachably fixed to the explosion-proof shell (11) by bolts, and the joint surface of the two forms an explosion-proof joint surface (30).

6. The split explosion-proof variable frequency motor of claim 1, wherein: At least one separation fixing plate (16) is arranged in the explosion-proof shell (11), and the separation fixing plate (16) separates the containing cavity (13) into a wire cavity (131) and a frequency conversion cavity (132).

7. The split explosion-proof variable frequency motor of claim 6, wherein: The separation fixing plate (16) comprises a separation plate (161) arranged vertically and a fixing plate (162) arranged horizontally at the top of the separation plate (161), and a plurality of explosion-proof through-wall terminals (163) are arranged horizontally and at intervals on the separation plate (161).

8. The split explosion-proof variable frequency motor of claim 7, wherein: The partition plate (161) and the explosion-proof housing (11) are provided with through-wall terminal positive and negative poles (164), the through-wall terminal positive and negative poles (164) respectively extend into the wiring cavity (131) and extend out of the explosion-proof housing (11), and are connected with the explosion-proof cable lead device (10) and the motor (2).

9. The split explosion-proof variable frequency motor of claim 1, wherein: The explosion-proof cover plate (12) comprises a first cover plate (121) and a second cover plate (122) which are respectively fixedly installed on the top of the wiring cavity (131) and the frequency conversion cavity (132) by bolts, and the two are respectively connected with the top of the explosion-proof housing (11) and the fixed plate (162) and form an explosion-proof joint surface (30).

10. The split explosion-proof variable frequency motor according to any one of claims 1-9, characterized in that: Rubber rings (31) are arranged between the explosion-proof joint surfaces (30) to improve the sealing performance.

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