Oil sludge reduction explosion-proof control cabinet based on PLC technology

Abstract

The utility model discloses a PLC technology-based oil sludge reduction explosion-proof control, which comprises a first cabinet body, an explosion-proof cavity is arranged on one side, close to the interior of the first cabinet body, of a cabinet door, a human-computer interface is arranged in the explosion-proof cavity, an explosion-proof glass cover and an explosion-proof mouse are arranged on the other side of the cabinet door, and the human-computer interface and the explosion-proof mouse are both electrically connected with a controller; a second cabinet body; the moving assembly comprises a supporting cylinder, a connecting column and a roller; a jacking assembly; the fixing assembly comprises a connecting cylinder and a positioning rod, and when the end, close to the supporting cylinder, of the positioning rod extends and penetrates through the supporting cylinder and the first positioning through hole, the rolling wheel is fixed to the lower portion of the supporting cylinder; and when the end, close to the supporting cylinder, of the positioning rod extends and penetrates through the supporting cylinder and the second positioning through hole, the rolling wheel is stored in the supporting cylinder. According to the utility model, the touch screen can be operated under the condition that the explosion-proof glass cover is not opened, and the problem of poor stability when the control cabinet stops moving due to the installation of the rollers can be solved.

Description

Technical Field

[0001] The utility model relates to a PLC control cabinet, in particular to an explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology. Background Art

[0002] The explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology has great economic and environmental benefits in oil sludge recovery and sludge reduction, so it has a wide range of applications in the field of oily sludge reduction.

[0003] When the existing PLC explosion-proof electric control cabinet controlled by a touch screen is operated, the explosion-proof glass cover needs to be opened for operation, which reduces the safety of the explosion-proof cabinet; and the explosion-proof cabinet is large in volume, inconvenient to carry and move, and is often carried by installing rollers, but the control cabinet with rollers has poor stability after stopping moving. Summary of the Utility Model

[0004] In view of the above defects or deficiencies in the prior art, it is expected to provide an explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology, which can control the touch screen without opening the explosion-proof glass cover and can also solve the problem of poor stability when the control cabinet stops moving due to the installation of rollers.

[0005] An explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology provided by the utility model includes:

[0006] A first cabinet body, the inside of the first cabinet body is used for placing electrical components, one side of the first cabinet body is hinged with a cabinet door, an explosion-proof cavity is arranged on the side of the cabinet door close to the inside of the first cabinet body, a human-machine interface is arranged in the explosion-proof cavity, an explosion-proof glass cover and an explosion-proof mouse are arranged on the other side of the cabinet door, the explosion-proof glass cover faces the human-machine interface, and both the human-machine interface and the explosion-proof mouse are electrically connected to a controller in the first cabinet body;

[0007] A second cabinet body, the second cabinet body is arranged below the first cabinet body and is used for placing a terminal block;

[0008] A moving component, including support cylinders distributed in a rectangular shape at the bottom of the second cabinet body, a connecting column is slidably sleeved inside the support cylinder, and a roller is fixedly arranged at the bottom of the connecting column;

[0009] A jacking component, arranged at the bottom of the second cabinet body and used for supporting and jacking up the second cabinet body and the first cabinet body;

[0010] A fixing component, including a connecting cylinder and a positioning rod, two groups of the connecting cylinders are symmetrically arranged and the two groups of the connecting cylinders are respectively arranged between two adjacent groups of the support cylinders, the positioning rods are slidably sleeved at both ends of the connecting cylinder, and a first positioning through hole and a second positioning through hole are vertically arranged in parallel on the connecting column;

[0011] When the positioning rod extends close to one end of the support tube and penetrates the support tube and the first positioning through hole, the roller is fixed below the support tube;

[0012] When the positioning rod extends from one end close to the support tube and penetrates the support tube and the second positioning through hole, the roller is received in the interior of the support tube.

[0013] Furthermore, the lifting assembly includes a cylinder and a support plate, the cylinder is arranged at the bottom center of the second cabinet, the support plate is arranged at the telescopic end of the cylinder, and the telescopic end of the cylinder is telescopic in the vertical direction.

[0014] Furthermore, the support tube is symmetrically provided with a first limiting hole and a second limiting hole, both ends of the connecting tube are fixedly connected to the support tube, and both ends of the connecting tube are communicated with the first limiting hole.

[0015] Furthermore, a toggle plate is provided at one end of the positioning rod away from the supporting tube, a sliding groove is provided on the connecting tube along its length direction, and the toggle plate extends to the outside of the sliding groove and is slidably connected to the sliding groove.

[0016] Furthermore, the fixing assembly also includes a fixing bolt arranged on the connecting tube, and the positioning rod is provided with a plurality of threaded holes matching the fixing bolt.

[0017] Furthermore, the fixing bolts are arranged at both ends of the connecting tube, and at least two groups of fixing bolts are arranged at both ends of the connecting tube.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The explosion-proof control cabinet of the utility model comprises a first cabinet body and a second cabinet body, the first cabinet body is used for placing electrical components, the second cabinet body is used for placing terminal blocks, the electrical components are connected to the terminal blocks in the second control cabinet through wiring harnesses, an explosion-proof cavity is arranged on one side of a cabinet door of the first cabinet body close to the inside of the first cabinet body, a human-machine interface is arranged in the explosion-proof cavity, an explosion-proof glass cover and an explosion-proof mouse are arranged on the other side of the cabinet door, the human-machine interface can be visually observed through the explosion-proof glass, and the human-machine interface and the explosion-proof mouse are both electrically connected to the controller, the human-machine interface is controlled through the explosion-proof mouse and the controller, and there is no need to open the explosion-proof glass cover to perform touch operation on the human-machine interface, so that the first cabinet body is always in a closed state when working, thereby improving the safety of the present application. Safety; the moving component of the present application includes rollers, which are used to facilitate the transportation and movement of the control cabinet of the present application, thereby improving the convenience of movement and transportation; when the explosion-proof control cabinet is moved to a fixed position, the lifting component is started, and the lifting component lifts up the second cabinet body and the first cabinet body as a whole, so that the roller is separated from the bottom surface, and then the positioning rod is passed through the second positioning through hole on the supporting tube and the connecting column, so that the roller is stored in the interior of the supporting tube, and then the lifting component is started again, and the lifting component drives the second cabinet body and the first cabinet body to descend as a whole until the bottom of the supporting tube contacts the ground, and the explosion-proof control cabinet is stably supported by the supporting tube and the lifting component, thereby improving the stability of the device in a fixed state after it stops moving. The structure of the present application is simple and easy to operate.

[0020] It should be understood that the contents described in the utility model summary are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 It is a front view of the utility model;

[0023] Figure 2 It is a side view of the utility model;

[0024] Figure 3 It is an enlarged view of the fixing assembly of the utility model;

[0025] Numbers in the figure: 1, first cabinet; 2, second cabinet; 3, moving assembly; 4, lifting assembly; 5, fixed assembly; 6, finned heat sink; 7, inverter 7;

[0026] 11. Explosion-proof cavity; 12. Human-machine interface; 13. Explosion-proof glass cover; 14. Explosion-proof mouse;

[0027] 31. Support cylinder; 32. Connecting column; 33. Roller;

[0028] 41. Cylinder; 42. Support plate;

[0029] 51. Connecting tube; 52. Positioning rod; 53. Paddle; 54. Slide groove; 55. Fixing bolt;

[0030] 311, first limiting hole; 312, second limiting hole;

[0031] 321, a first positioning through hole; 322, a second positioning through hole. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Please refer to Figures 1 to 3 The embodiment of the utility model provides an explosion-proof control cabinet for oily sludge reduction based on PLC technology, which is applied to the technical field of sludge reduction in oilfield sludge pools.

[0035] The present application discloses a PLC-based oil sludge reduction explosion-proof control cabinet comprising a first cabinet 1, a second cabinet 2, a moving component 3, a lifting component 4 and a fixing component 5;

[0036] Specifically, the explosion-proof control cabinet of the present application is of BXK type, the first cabinet 1 is an explosion-proof cabinet, the interior of the first cabinet 1 is used to place electrical components, such as installing Siemens S7-200SMART PLC controller, miniature circuit breaker, fuse, contactor, thermal relay, switching power supply and inverter 7 and other electrical components; the second cabinet 2 is an increased safety control cabinet, the second cabinet 2 is arranged below the first cabinet 1, and is used to place the terminal block, the first cabinet 1 and the second cabinet 2 are connected as a whole by welding, and the first cabinet 1 and the second cabinet 2 are connected by an electrical interface, the electrical components in the first cabinet 1 are connected to the terminal block in the second cabinet 2 through a wiring harness, the wiring harness passes through the electrical interface, and the electrical interface is sealed with explosion-proof resin to meet the explosion-proof requirements and improve the safety of the equipment;

[0037] Preferably, one side of the first cabinet body 1 is hinged with a cabinet door. An explosion-proof cavity 11 is arranged on the side of the cabinet door close to the inside of the first cabinet body 1. A human-machine interface 12 is arranged in the explosion-proof cavity 11. An explosion-proof glass cover 13 and an explosion-proof mouse 14 are arranged on the other side of the cabinet door. The explosion-proof glass cover 13 faces the human-machine interface 12. Both the human-machine interface 12 and the explosion-proof mouse 14 are electrically connected to the controller. Specifically, the human-machine interface 12 is a touch screen. A large through hole is opened on the cabinet door at a position facing the explosion-proof cavity 11. The explosion-proof glass cover 13 is installed outside the large through hole. The screen of the human-machine interface can be observed through the explosion-proof glass cover 13. Specifically, the explosion-proof mouse 14 is fixedly installed on the outer side of the cabinet door. The explosion-proof mouse 14 is provided with an induction ball and operation keys. By rotating the induction ball with a finger, the indicating arrow on the human-machine interface 12 can be controlled to move, and the human-machine interface 12 is controlled through the induction ball and the operation keys. Specifically, the S7 communication protocol is used to transmit signals between the human-machine interface 12 and the controller, and the wiring between the explosion-proof mouse 14 and the human-machine interface 12 is arranged inside the explosion-proof cavity 11 to meet the explosion-proof requirements.

[0038] When the human-machine interface needs to be operated according to the application requirements on site, the explosion-proof mouse 14 is operated. Since both the explosion-proof mouse 14 and the human-machine interface 12 are connected to the controller, the human-machine interface 12 can be controlled by clicking the induction ball and the operation keys on the explosion-proof mouse 14. There is no need to open the explosion-proof glass cover 13 to operate by touching the screen of the human-machine interface 12, so that the first cabinet body 1 is always in a sealed state during operation, improving the safety of the control cabinet of the present application. And compared with the touch screen with explosion-proof function, the prices of the explosion-proof glass cover 2 and the explosion-proof mouse 3 are lower, reducing the equipment cost.

[0039] Preferably, the moving component 3 includes support cylinders 31 distributed in a rectangular shape at the bottom of the second cabinet body 2. A connecting column 32 is slidably sleeved inside the support cylinder 31. A roller 33 is fixedly arranged at the bottom of the connecting column 32.

[0040] The jacking component 4 is arranged at the bottom of the second cabinet body 2 and is used to support and jack up the second cabinet body 2 and the first cabinet body 1.

[0041] The fixing component 5 includes a connecting cylinder 51 and a positioning rod 52. Two groups of connecting cylinders 51 are symmetrically arranged and the two groups of connecting cylinders 51 are respectively arranged between two adjacent support cylinders 31. The positioning rod 52 is slidably sleeved at both ends of the connecting cylinder 51. First positioning through holes 321 and second positioning through holes 322 are arranged side by side up and down on the connecting column 32.

[0042] When one end of the positioning rod 52 close to the support cylinder 31 extends and penetrates through the support cylinder 31 and the first positioning through hole 321, the roller 33 is fixed below the support cylinder 31.

[0043] When one end of the positioning rod 52 extends close to the support cylinder 31 and penetrates through the support cylinder 31 and the second positioning through-hole 322, the roller 33 is received inside the support cylinder 31.

[0044] Specifically, the four support cylinders 31 are all arranged vertically and are all hollow inside. An opening is provided at the bottom of each support cylinder 31. The connecting column 32 is slidably connected to the inner wall of the support cylinder 31. A roller 33 is fixedly provided at the bottom of the connecting column 32. The maximum diameter of the roller 33 is smaller than the opening at the bottom of the support cylinder 31, so that the roller 33 can be received inside the support cylinder 31;

[0045] The positioning rod 32 is a square rod with a square cross-section. The first positioning through-hole 321 and the second positioning through-hole 322 are both square through-holes. The shape of the positioning rod 32 matches the shapes of the first positioning through-hole 321 and the second positioning through-hole 322;

[0046] When it is necessary to move the explosion-proof control cabinet, pull the positioning rod 52 to make the positioning rod 52 extend and horizontally penetrate through the first positioning through-hole 321 on the support cylinder 31 and the connecting column 32. At this time, the roller 33 extends outside the support cylinder 31 and is located below the support cylinder 31. The roller 33 contacts the ground, facilitating the handling and movement of the explosion-proof control cabinet through the roller 33 and improving the convenience of handling and movement of the present application;

[0047] When the explosion-proof control cabinet stops moving, start the jacking assembly 4. The jacking assembly 4 jacks up the second cabinet body 2 and the first cabinet body 1 as a whole, so that the roller 33 is separated from the bottom surface. Then pull the positioning rod 52 to make the positioning rod 52 penetrate through the second positioning through-hole 322 on the support cylinder 31 and the connecting column 32, so that the roller 33 is received inside the support cylinder 31. Subsequently, start the jacking assembly 4 again. The jacking assembly 4 drives the second cabinet body 2 and the first cabinet body 1 to descend as a whole until the bottom of the support cylinder 31 contacts the ground. The explosion-proof control cabinet is stably supported by the support cylinder 31 and the jacking assembly 4, improving the stability of the device in the fixed state after stopping moving. The structure of the present application is simple and easy to operate.

[0048] In a preferred embodiment, as Figure 1 shown, the jacking assembly 4 includes a cylinder 41 and a support plate 42. The cylinder 41 is arranged at the center of the bottom of the second cabinet body 2. The support plate 42 is arranged at the telescopic end of the cylinder 41. The telescopic end of the cylinder 41 telescopically moves in the vertical direction.

[0049] In this embodiment, the cylinder 41 is arranged at the bottom of the second cabinet 2 through a mounting plate. After the explosion-proof control cabinet stops moving, the cylinder 41 is started, and the telescopic end of the cylinder 41 moves downward, driving the support plate 42 to contact the ground. The surface area of the support plate 42 is large enough to stably support the explosion-proof control cabinet. After the roller 33 is retracted into the support cylinder 31, the cylinder 41 is started again, and the cylinder 41 contracts until the bottom of the support cylinder 31 contacts the ground. At this time, the support plate 42 and the support column 31 cooperate to stably support the explosion-proof control cabinet.

[0050] In a preferred embodiment, as Figure 3 shown, the support cylinder 31 is symmetrically provided with a first limit hole 311 and a second limit hole 312. Both ends of the connecting cylinder 51 are fixedly connected to the support cylinder 31, and both ends of the connecting cylinder 51 communicate with the first limit hole 311.

[0051] In this embodiment, both the first limit hole 311 and the second limit hole 312 are square holes matching the shape of the positioning post 52. The first limit hole 311 and the second limit hole 312 are symmetrically arranged and both the first limit hole 311 and the second limit hole 312 communicate with the inner cavity of the support cylinder 31;

[0052] When the explosion-proof control cabinet needs to be moved, the positioning rod 52 is pulled to extend and horizontally penetrate through the first limit hole 311, the first positioning through hole 321 and the second limit hole 311. At this time, the roller 33 extends to the outside of the support cylinder 31 and the roller 33 contacts the ground;

[0053] When the explosion-proof control cabinet stops moving, the jacking assembly 4 is started. The jacking assembly 4 jacks up the second cabinet 2 and the first cabinet 1 as a whole, so that the roller 33 is separated from the bottom surface. Then the positioning rod 52 is pulled to penetrate through the first limit hole 311, the second positioning through hole 322 and the second limit hole 311, so that the roller 33 is retracted into the support cylinder 31.

[0054] The storage of the roller 33 can also prevent the roller 33 from being damaged by external force collision in the non-use state, and at the same time reduce the rusting of the roller caused by the external environment, affecting its use effect.

[0055] In some other embodiments, a first limiting plate is provided on the upper interior of the support column 31, a second limiting plate is provided on the inner bottom of the support column 31 (located above the opening), and a through hole is provided on the second limiting plate for the roller 33 to pass through; when the positioning rod 52 passes through the second positioning through hole 322, the top of the connecting column 32 abuts against the first limiting plate; when the positioning rod 52 passes through the first positioning through hole 321, the bottom of the connecting column 32 abuts against the second limiting plate; the provision of the first limiting plate and the second limiting plate facilitates the quick alignment of the first positioning through hole 321 and the second positioning through hole 322 with the first limiting hole 311 and the second limiting hole 312.

[0056] In a preferred embodiment, if Figure 2 and Figure 3 As shown, a shifting piece 53 is provided at one end of the positioning rod 52 away from the supporting tube 31 , and a sliding groove 54 is provided on the connecting tube 51 along its length direction. The shifting piece 53 extends to the outside of the sliding groove 54 and is slidably connected to the sliding groove 54 .

[0057] In this embodiment, the arrangement of the shifting piece 53 facilitates the positioning rod 52 to slide in the connecting tube 51, thereby improving the convenience of operation.

[0058] In a preferred embodiment, if Figure 2 and Figure 3 As shown, the fixing assembly 5 further includes a fixing bolt 55 disposed on the connecting tube 51 , and the positioning rod 52 is provided with a plurality of threaded holes matching the fixing bolt 55 .

[0059] In this embodiment, an opening is provided on the connecting tube 51, and the opening is arranged in a one-to-one correspondence with the fixing bolt 55, and the fixing bolt 55 is inserted into the opening; after the positioning rod 52 passes through the first positioning through hole 321 or the second positioning through hole 322, the fixing bolt 55 passes through the opening and is inserted into the threaded hole on the positioning rod 52, and the fixing bolt 55 is threadedly connected with the threaded hole to fix the positioning rod 52 to the connecting tube 51; the positioning rod 52 is stably inserted into the first positioning through hole 321 or the second positioning through hole 322, thereby improving the stability of the roller 33 during the movement;

[0060] When the roller 33 is received in the support tube 31 , the positioning rod 52 also slides into the connecting tube 51 , and the positioning rod 52 is fixed in the connecting tube 51 by the fixing bolt 55 , so as to prevent the roller 33 from contacting the bottom surface under its own weight.

[0061] In a preferred embodiment, the fixing bolts 55 are disposed at both ends of the connecting tube 51, and at least two sets of fixing bolts 55 are disposed at both ends of the connecting tube 51 to improve the stability of the positioning rod 52 and the connecting tube 51 after being fixed.

[0062] In some other embodiments, the frequency converter 7 inside the first cabinet 1 is close to the back of the first cabinet 1 (i.e., the side away from the cabinet door). The frequency converter 7 is prone to heat generation during operation. A finned heat sink 6 is provided at the position on the back of the first cabinet 1 opposite to the frequency converter 7. The finned heat sink 6 is installed outside the first cabinet 1 by bolts. The first cabinet 1 of the present application is made of stainless steel material and has good thermal conductivity. The heat generated by the frequency converter 7 is conducted to the first cabinet 1, and the first cabinet 1 transfers the heat to the finned heat sink 6. The finned heat sink 6 is in full contact with the outside air and transfers the heat to the atmosphere. Compared with only relying on the first cabinet 1 to conduct heat to the outside, the finned heat sink 6 has a larger contact area with the outside air, improving the heat dissipation effect.

[0063] In some other embodiments, an Ethernet port and a 485 communication interface are further provided in the second cabinet 2. By providing multiple Ethernet ports and 485 communication interfaces, the present application can meet various different communication wiring requirements and improve its practicability.

[0064] In a preferred embodiment, the controller is electrically connected to a host computer. The controller is connected to other hardware devices of the reduction system, and the controller is electrically connected to the host computer. The reduction system can be remotely controlled through the host computer.

[0065] In the description of this specification, terms such as "connection", "installation", and "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0066] In the description of this specification, the descriptions of terms such as "one embodiment" and "some embodiments" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology, characterized in that, include: A first cabinet (1), wherein the interior of the first cabinet (1) is used to place electrical components, a cabinet door is hingedly connected to one side of the first cabinet (1), an explosion-proof cavity (11) is arranged on the side of the cabinet door close to the interior of the first cabinet (1), a human-machine interface (12) is arranged in the explosion-proof cavity (11), an explosion-proof glass cover (13) and an explosion-proof mouse (14) are arranged on the other side of the cabinet door, the explosion-proof glass cover (13) faces the human-machine interface (12), and the human-machine interface (12) and the explosion-proof mouse (14) are both electrically connected to a controller in the first cabinet (1); A second cabinet (2), the second cabinet (2) being arranged below the first cabinet (1) and being used for accommodating a wiring terminal block; The moving assembly (3) comprises a supporting cylinder (31) distributed in a rectangular shape at the bottom of the second cabinet (2), a connecting column (32) being provided in a sliding sleeve inside the supporting cylinder (31), and a roller (33) being fixedly provided at the bottom of the connecting column (32); A lifting assembly (4) is arranged at the bottom of the second cabinet (2) and is used to support and lift the second cabinet (2) and the first cabinet (1); The fixing assembly (5) comprises a connecting tube (51) and a positioning rod (52), wherein the connecting tube (51) is symmetrically arranged in two groups and the two groups of the connecting tubes (51) are respectively arranged between two adjacent groups of the supporting tubes (31), the positioning rods (52) are slidably sleeved on both ends of the connecting tube (51), and the connecting column (32) is provided with a first positioning through hole (321) and a second positioning through hole (322) in parallel in the upper and lower directions; When the positioning rod (52) extends close to one end of the support tube (31) and penetrates the support tube (31) and the first positioning through hole (321), the roller (33) is fixed below the support tube (31); When the positioning rod (52) extends close to one end of the support tube (31) and penetrates the support tube (31) and the second positioning through hole (322), the roller (33) is received inside the support tube (31).

2. The explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology according to claim 1, wherein The lifting assembly (4) comprises a cylinder (41) and a support plate (42); the cylinder (41) is arranged at the bottom center of the second cabinet (2); the support plate (42) is arranged at the telescopic end of the cylinder (41); and the telescopic end of the cylinder (41) telescopes in a vertical direction.

3. A sludge reduction explosion-proof control cabinet based on PLC technology according to claim 1, characterized in that The support tube (31) is symmetrically provided with a first limiting hole (311) and a second limiting hole (312), both ends of the connecting tube (51) are fixedly connected to the support tube (31), and both ends of the connecting tube (51) are communicated with the first limiting hole (311).

4. A sludge reduction explosion-proof control cabinet based on PLC technology according to claim 1, characterized in that, A shifting piece (53) is provided at one end of the positioning rod (52) away from the supporting tube (31); a sliding groove (54) is provided on the connecting tube (51) along its length direction; the shifting piece (53) extends to the outside of the sliding groove (54) and is slidably connected to the sliding groove (54).

5. A sludge reduction explosion-proof control cabinet based on PLC technology according to claim 1, characterized in that The fixed component (5) further includes a fixing bolt (55) disposed on the connecting cylinder (51), and a plurality of threaded holes matching the fixing bolt (55) are provided on the positioning rod (52).

6. The explosion-proof control cabinet for reducing the amount of oily sludge based on PLC technology according to claim 5, characterized in that, The fixing bolt (55) is disposed at both ends of the connecting cylinder (51), and at least two groups of fixing bolts (55) are provided at both ends of the connecting cylinder (51).

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