An explosion-proof electrical control box

Abstract

One or more embodiments of this specification provide an explosion-proof electrical control box. By arranging a positive pressure cover outside the electrical cabinet and providing an adjustment mechanism, through the cooperation of a partition plate, a sealing groove, and a partition member, the interior of the positive pressure cover can be divided into a first positive pressure chamber and a second positive pressure chamber. And by arranging a maintenance door, an air intake assembly, a first pressure relief assembly, and a second pressure relief assembly, after separating the first positive pressure chamber and the second positive pressure chamber, the pressure in the first positive pressure chamber can be adjusted adaptively, and the gas in the second positive pressure chamber can be discharged, so that there is no longer positive pressure in the second positive pressure chamber. Thus, the electrical cabinet can be repaired through the maintenance door, and it is not necessary to discharge the positive pressure inert gas in the entire positive pressure cover, reducing costs and improving the convenience of use.

Description

Technical Field

[0001] One or more embodiments of this specification relate to the technical field of explosion-proof electrical cabinets, and in particular, to an explosion-proof electrical control box. Background Art

[0002] Explosion-proof electrical cabinets are usually divided into three types: flameproof type, intrinsically safe type, and pressurized type. Among them, the explosion-proof principle of the pressurized type is to introduce fresh air or inert gas with a certain pressure into the equipment housing, so that the surrounding combustible gas cannot enter the housing, thereby preventing the ignition source from contacting the explosive gas and achieving explosion protection. However, when the pressurized explosion-proof power distribution cabinet is being repaired, it must be shut down as a whole, and the gas inside it must be discharged to make the internal and external pressures the same before the power distribution cabinet can be opened for repair. The repair cost is relatively high and it is inconvenient to use. Summary of the Invention

[0003] In view of this, the purpose of one or more embodiments of this specification is to propose an explosion-proof electrical control box to solve the problem of inconvenient repair of traditional explosion-proof power distribution cabinets.

[0004] Based on the above purpose, one or more embodiments of this specification provide an explosion-proof electrical control box, including an electrical cabinet, a positive pressure housing, and a pressure control cabinet. The positive pressure housing is arranged outside the electrical cabinet, and the pressure control cabinet is arranged at the bottom of the positive pressure housing for monitoring and adjusting the working state of the positive pressure housing;

[0005] An adjustment mechanism is arranged inside the positive pressure housing. The adjustment mechanism includes partitions arranged on both sides of the electrical cabinet. There is a gap between the top of the partition and the top of the positive pressure housing. A sealing groove is opened at the top of the partition. The adjustment mechanism also includes a partition member arranged at the top of the positive pressure housing. The partition member is matched with the sealing groove and is used to insert into the sealing groove to divide the inside of the positive pressure housing into a first positive pressure chamber and a second positive pressure chamber. A maintenance door is arranged on the second positive pressure chamber;

[0006] An air intake component and a first pressure relief component are arranged in the first positive pressure chamber, and a second pressure relief component is arranged in the second positive pressure chamber.

[0007] Preferably, a first pressure sampling sensor is arranged in the first positive pressure chamber, and a second pressure sampling sensor is arranged in the second positive pressure chamber;

[0008] The air intake component includes an intake pipeline and an intake solenoid valve arranged in the intake pipeline. The first pressure relief component includes a first pressure relief pipeline and a first pressure relief solenoid valve arranged in the first pressure relief pipeline. The second pressure relief component includes a second pressure relief pipeline and a second pressure relief solenoid valve arranged in the second pressure relief pipeline. The pressure control cabinet is used to receive the measurement data of the first pressure sampling sensor and the second pressure sampling sensor and display them, and is also used to control the opening degrees of the intake solenoid valve, the first pressure relief solenoid valve, and the second pressure relief solenoid valve.

[0009] Preferably, the positive pressure cover body is provided with a partition groove on the side wall at the top of the partition board, and the side of the partition member is provided with a partition strip, and the partition strip is embedded and installed in the partition groove.

[0010] Preferably, accommodation grooves are respectively formed in the partition groove and the sealing groove, an inflatable seal is arranged in the partition strip, the second pressure relief pipeline is connected with a pressure relief branch, the pressure relief branch is connected with the inflatable seal, and a regulating solenoid valve is arranged in the pressure relief branch.

[0011] Preferably, a control switch for controlling the partition member is arranged in the pressure control cabinet. After the control switch controls the partition member to be inserted into the sealing groove, it is further used to open the second pressure relief solenoid valve and the regulating solenoid valve, inject gas into the inflatable seal, and when the second pressure sampling sensor detects that the pressure in the second positive pressure cavity drops by a specified value, close the regulating solenoid valve and discharge the gas in the second positive pressure cavity.

[0012] Preferably, a detection switch for detecting whether the partition member is inserted is arranged in the sealing groove, a locking member is arranged on the maintenance door, and when the detection switch does not detect the insertion of the partition member, the maintenance door is locked through the locking member.

[0013] As can be seen from the above, the explosion-proof electrical control box provided by one or more embodiments of this specification, by arranging a positive pressure cover body outside the electrical cabinet and arranging an adjusting mechanism, through the cooperation of the partition board, the sealing groove and the partition member, the interior of the positive pressure cover body can be divided into a first positive pressure cavity and a second positive pressure cavity, and by arranging a maintenance door, an air inlet assembly, a first pressure relief assembly and a second pressure relief assembly, after separating the first positive pressure cavity and the second positive pressure cavity, the pressure in the first positive pressure cavity can be adaptively adjusted, and the gas in the second positive pressure cavity can be discharged, so that there is no longer positive pressure in the second positive pressure cavity, and thus the electrical cabinet can be repaired through the maintenance door, without the need to discharge the positive pressure inert gas in the entire positive pressure cover body, reducing costs and improving the convenience of use. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only one or more embodiments of this specification. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the explosion-proof electrical control box according to one or more embodiments of this specification;

[0016] Figure 2 It is a schematic top view structure diagram of the interior of the positive pressure cover body according to one or more embodiments of this specification;

[0017] Figure 3 Schematic diagram of the partition structure for one or more embodiments of this specification;

[0018] Figure 4 Top view structure schematic diagram of the accommodation groove for one or more embodiments of this specification. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present disclosure clearer and more understandable, the following further elaborates on the present disclosure in conjunction with specific embodiments.

[0020] It should be noted that unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should have the ordinary meanings understood by those of ordinary skill in the field to which the present disclosure pertains. The "first", "second" and similar terms used in one or more embodiments of this specification do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] An explosion-proof electrical control box provided by an embodiment of this specification includes an electrical cabinet 1, a positive pressure cover 2 and a pressure control cabinet 3. The positive pressure cover 2 is arranged outside the electrical cabinet 1, and the pressure control cabinet 3 is arranged at the bottom of the positive pressure cover 2 for monitoring and adjusting the working state of the positive pressure cover 2; during use, by filling the positive pressure cover 2 with positive pressure inert gas, the entire electrical cabinet 1 is wrapped therein, separating the external air, so that the external air cannot enter the positive pressure cover 2 and the electrical cabinet 1, thereby achieving explosion-proof.

[0022] An adjustment mechanism is arranged inside the positive pressure cover 2. The adjustment mechanism includes partition plates 41 arranged on both sides of the electrical cabinet 1. There is a gap between the top of the partition plates 41 and the top of the positive pressure cover 2. A sealing groove 42 is formed at the top of the partition plates 41. The adjustment mechanism further includes a partition member 43 arranged at the top of the positive pressure cover 2. The partition member 43 is matched with the sealing groove 42. The partition member 43 is used to insert into the sealing groove 42 to divide the interior of the positive pressure cover 2 into a first positive pressure chamber 21 and a second positive pressure chamber 22. An inspection door is arranged on the second positive pressure chamber 22. An air inlet assembly 23 and a first pressure relief assembly 24 are arranged in the first positive pressure chamber 21. A second pressure relief assembly 25 is arranged in the second positive pressure chamber 22.

[0023] Through the explosion-proof electrical control box provided by the embodiments of this specification, by arranging a positive pressure cover 2 outside the electrical cabinet 1 and arranging an adjusting mechanism, through the cooperation of the partition plate 41, the sealing groove 42, and the partition member 43, the interior of the positive pressure cover 2 can be divided into a first positive pressure chamber 21 and a second positive pressure chamber 22. And by arranging a maintenance door, an air intake assembly 23, a first pressure relief assembly 24, and a second pressure relief assembly 25, after the first positive pressure chamber 21 and the second positive pressure chamber 22 are separated, the pressure in the first positive pressure chamber 21 can be adaptively adjusted, and the gas in the second positive pressure chamber 22 can be discharged, so that there is no longer positive pressure in the second positive pressure chamber 22, and thus the electrical cabinet 1 can be repaired through the maintenance door, without the need to discharge the positive pressure inert gas in the entire positive pressure cover 2, reducing costs and improving the convenience of use.

[0024] As an implementation manner, a first pressure sampling sensor is arranged in the first positive pressure chamber 21, a second pressure sampling sensor is arranged in the second positive pressure chamber 22, the air intake assembly 23 includes an air intake pipeline and an air intake solenoid valve arranged in the air intake pipeline, the first pressure relief assembly 24 includes a first pressure relief pipeline and a first pressure relief solenoid valve arranged in the first pressure relief pipeline, the second pressure relief assembly 25 includes a second pressure relief pipeline and a second pressure relief solenoid valve arranged in the second pressure relief pipeline, and the pressure control cabinet 3 is used to receive the measurement data of the first pressure sampling sensor and the second pressure sampling sensor and display them, and is also used to control the opening degrees of the air intake solenoid valve, the first pressure relief solenoid valve, and the second pressure relief solenoid valve.

[0025] Through the above settings, the pressures in the first positive pressure chamber 21 and the second positive pressure chamber 22 can be monitored and adjusted respectively, so as to meet different requirements when the partition member 43 is working and not working.

[0026] As an implementation manner, a partition groove 44 is arranged on the side wall of the top of the partition plate 41 of the positive pressure cover 2, a partition strip is arranged on the side surface of the partition member 43, and the partition strip is embedded and installed in the partition groove 44. Then when the partition member 43 is inserted into the installation groove, the partition strip also cooperates with the partition groove 44 at the same time, so as to integrally partition between the first positive pressure chamber 21 and the second positive pressure chamber 22, and keep the first positive pressure chamber 21 sealed.

[0027] As an implementation manner, accommodation grooves 441 are respectively arranged in the partition groove 44 and the sealing groove 42, an inflatable seal 431 is arranged in the partition strip, the second pressure relief pipeline is connected with a pressure relief branch 26, the pressure relief branch 26 is connected with the inflatable seal 431, and an adjusting solenoid valve is arranged in the pressure relief branch 26.

[0028] For example, a control switch for controlling the partition member 43 is provided in the pressure control cabinet 3. After the control switch controls the partition member 43 to be inserted into the sealing groove 42, it is further used to open the second pressure relief solenoid valve and the regulating solenoid valve, inject gas into the inflatable seal 431, and when the second pressure sampling sensor detects that the pressure in the second positive pressure chamber 22 drops by a specified value, close the regulating solenoid valve and discharge the gas in the second positive pressure chamber 22.

[0029] Then, by inflating the inflatable seal 431, the inflatable seal 431 expands to fill the sealing groove 42, thereby improving the sealing effect.

[0030] As an implementation manner, a detection switch for detecting whether the partition member 43 is inserted is provided in the sealing groove 42, and a locking member is provided on the inspection door. When the detection switch does not detect the insertion of the partition member 43, the inspection door is locked by the locking member.

[0031] By providing the detection switch and the locking member, it is possible to prevent the inspection door from being accidentally opened when the partition member 43 does not separate the first positive pressure chamber 21 and the second positive pressure chamber 22, thereby improving the safety of the device. For example, the detection switch can be set as a photoelectric switch, a push switch, etc., and the locking member can be set in the form of an electromagnetic lock catch, etc.

[0032] In actual production and manufacturing, the sealing between the electrical cabinet 1 and the first positive pressure chamber 21 needs to be considered.

[0033] For the explosion-proof electrical control box provided in this specification, when the electrical cabinet 1 needs to be repaired, the positive pressure cover 2 can be divided into a first positive pressure chamber 21 and a second positive pressure chamber 22 by the partition member 43, and the positive pressure gas in the second positive pressure chamber 22 can be discharged separately, so as to open the inspection door to repair the electrical cabinet 1.

[0034] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the idea of the present disclosure, the technical features between the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present specification as described above, and they are not provided in detail for the sake of brevity.

[0035] Although the present disclosure has been described in connection with specific embodiments of the present disclosure, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) can be used with the embodiments discussed.

[0036] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of protection of this disclosure.

Claims

1. An explosion-proof electrical control box, characterized in that, It includes an electrical cabinet, a positive pressure cover body, and a pressure control cabinet. The positive pressure cover body is arranged outside the electrical cabinet, and the pressure control cabinet is arranged at the bottom of the positive pressure cover body and is used for monitoring and adjusting the working state of the positive pressure cover body; An adjusting mechanism is arranged inside the positive pressure cover body. The adjusting mechanism includes partitions arranged on both sides of the electrical cabinet. There is a gap between the top of the partition and the top of the positive pressure cover body. A sealing groove is formed at the top of the partition. The adjusting mechanism further includes a partition member arranged at the top of the positive pressure cover body. The partition member is matched with the sealing groove and is used for inserting into the sealing groove to divide the interior of the positive pressure cover body into a first positive pressure chamber and a second positive pressure chamber. An access door is arranged on the second positive pressure chamber; An air intake assembly and a first pressure relief assembly are arranged in the first positive pressure chamber, and a second pressure relief assembly is arranged in the second positive pressure chamber.

2. The explosion-proof electrical control box according to claim 1, characterized in that, A first pressure sampling sensor is arranged in the first positive pressure chamber, and a second pressure sampling sensor is arranged in the second positive pressure chamber; The air intake assembly includes an intake pipeline and an intake solenoid valve arranged in the intake pipeline. The first pressure relief assembly includes a first pressure relief pipeline and a first pressure relief solenoid valve arranged in the first pressure relief pipeline. The second pressure relief assembly includes a second pressure relief pipeline and a second pressure relief solenoid valve arranged in the second pressure relief pipeline. The pressure control cabinet is used for receiving and displaying the measurement data of the first pressure sampling sensor and the second pressure sampling sensor, and is also used for controlling the opening degrees of the intake solenoid valve, the first pressure relief solenoid valve, and the second pressure relief solenoid valve.

3. The explosion-proof electrical control box according to claim 2, characterized in that, The positive pressure cover body is provided with a partition groove on the side wall at the top of the partition. The partition member is provided with a partition strip on the side, and the partition strip is embedded and installed in the partition groove.

4. The explosion-proof electrical control box according to claim 3, characterized in that, Accommodation grooves are formed in both the partition groove and the sealing groove. An inflatable seal is arranged in the partition strip. The second pressure relief pipeline is connected with a pressure relief branch, and the pressure relief branch is connected with the inflatable seal. An adjusting solenoid valve is arranged in the pressure relief branch.

5. The explosion-proof electrical control box according to claim 4, characterized in that, A control switch for controlling the partition member is arranged in the pressure control cabinet. After the control switch controls the partition member to insert into the sealing groove, it is further used for opening the second pressure relief solenoid valve and the adjusting solenoid valve to inject gas into the inflatable seal, and when the second pressure sampling sensor detects that the pressure in the second positive pressure chamber drops by a specified value, closing the adjusting solenoid valve to discharge the gas in the second positive pressure chamber.

6. The explosion-proof electrical control box according to claim 1, wherein, A detection switch for detecting whether the partition member is inserted is arranged in the sealing groove. A locking member is arranged on the access door. When the detection switch does not detect the insertion of the partition member, the access door is locked through the locking member.

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