Positive pressure explosion-proof cabinet

Abstract

The utility model relates to the technical field of explosion-proof cabinets, and discloses a positive pressure explosion-proof cabinet, which comprises a cabinet body, a power supply module arranged in the cabinet body, and a control button arranged on the outer wall of the cabinet body; the air-tight door has a first state in which the air-tight door is closed to block the control button and the ambient environment of the cabinet body; the power supply module is suitable for being connected with a power supply through a power supply incoming line, and the incoming line sealing joint is used for allowing the power supply incoming line to enter and exit the cabinet body; the power supply module is suitable for being connected with a load through a power supply outgoing line, and the outgoing line sealing joint is used for allowing the power supply outgoing line to go in and out of the cabinet body. According to the positive pressure explosion-proof cabinet provided by the utility model, the air-tight door is arranged to prevent the control button from always contacting with combustible gas around the cabinet body; by arranging the inlet wire sealing joint and the outlet wire sealing joint, the connection parts of the power supply inlet wire and the power supply outlet wire and the positive pressure explosion-proof cabinet are prevented from being exposed in combustible gas around the cabinet body, so that the potential safety hazard is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof cabinet, concretely relates to a positive pressure explosion -proof cabinet. BACKGROUND

[0002] Because electrical setting equipment deployment is not prohibited when the matter produces electric spark or forms hot appearance, they once meet with the combustible gas confusion of the scene, can cause the generation of explosion trouble, directly endanger user property and life safety. Therefore, with the rapid development of coal chemical industry, metal smelting, pharmaceutical industry, positive pressure explosion -proof cabinet is more and more widely used in system control. However, the control button and wiring row on the existing positive pressure explosion -proof cabinet body are exposed to the cabinet body, always exposed to the combustible gas in the scene, in the process of explosion -proof cabinet operation, the combustible gas around the cabinet can be detonated once the electric spark of control button and wiring row is generated, thereby there is a greater security risk. CONTENT OF UTILITY MODEL

[0003] Therefore, the utility model provides a positive pressure explosion -proof cabinet to solve the problem that the control button and wiring row on the positive pressure explosion -proof cabinet body are always exposed to the combustible gas, the combustible gas around the cabinet can be detonated once the electric spark of control button and wiring row is generated, and there is a greater security risk.

[0004] The utility model provides a positive pressure explosion -proof cabinet, comprising:

[0005] The cabinet body has an accommodating space inside, a power module is arranged in the accommodating space, a panel assembly is arranged on the outer wall of the cabinet body, and the panel assembly comprises a control button.

[0006] The airtight door is movably arranged on the outer wall of the cabinet body, and the airtight door has a first state of being closed to block the control button and the surrounding environment of the cabinet body and a second state of being opened to expose the control button to the surrounding environment of the cabinet body.

[0007] The incoming line sealing joint is arranged on the cabinet body, the power module is adapted to be connected with the power supply through the power supply incoming line, and the incoming line sealing joint is used for the power supply incoming line to enter and exit the cabinet body.

[0008] The outgoing line sealing joint is arranged on the cabinet body, the power module is adapted to be connected with the load through the power supply outgoing line, and the outgoing line sealing joint is used for the power supply outgoing line to enter and exit the cabinet body.

[0009] Advantages: the airtight door is arranged to avoid the control button from being in contact with the combustible gas around the cabinet body; the power supply incoming line enters and exits the cabinet body through the incoming line sealing joint, and the power supply outgoing line enters and exits the cabinet body through the outgoing line sealing joint, so that the connection between the power supply incoming line and the power supply outgoing line and the positive pressure explosion -proof cabinet is exposed to the combustible gas around the cabinet body, thereby reducing the security risk.

[0010] In an alternative embodiment, the first observation window is arranged on the area of the door corresponding to the panel assembly.

[0011] Beneficial effect: By arranging the first observation window, the condition of the panel assembly can be observed.

[0012] In an alternative embodiment, the number of outlet sealing joints is at least two, and each outlet sealing joint is provided with a power supply outlet, and the number of loads is matched with the number of power supply outlets, so that the power supply module can control multiple loads through multiple power supply outlets.

[0013] In an alternative embodiment, the cabinet body is provided with a second observation window, and the interior of the accommodation space can be observed through the second observation window.

[0014] Beneficial effect: By arranging the second observation window, the running condition of the components in the accommodation space can be observed.

[0015] In an alternative embodiment, the positive pressure explosion-proof cabinet further comprises a positive pressure purge controller, which is arranged on the cabinet body and communicates with the accommodation space, and is adapted to make the gas pressure in the accommodation space greater than the gas pressure of the ambient environment of the cabinet body.

[0016] Beneficial effect: By maintaining the positive pressure in the accommodation space, i.e. the gas pressure in the accommodation space is greater than the gas pressure of the ambient environment of the cabinet body, the combustible gas outside can be prevented from entering the accommodation space, so that the spark generated by the electrical appliances in the accommodation space cannot ignite the combustible gas.

[0017] In an alternative embodiment, the gas pressure in the accommodation space is defined as A, and the gas pressure of the ambient environment of the cabinet body 1 is defined as B, wherein 50pa≤A-B≤400pa.

[0018] Beneficial effect: By limiting the range of the difference between the gas pressures inside and outside the accommodation space, the combustible gas outside can be prevented from entering the accommodation space, and at the same time, the high gas pressure can be avoided to cause the components in the accommodation space to be deformed and damaged due to impact.

[0019] In an alternative embodiment, the panel assembly further comprises a display screen, and a gas pressure sensor is arranged in the accommodation space, and the display screen is electrically connected with the gas pressure sensor to display the gas pressure in the accommodation space.

[0020] Beneficial effect: By arranging the display screen, the operator can intuitively observe and know the gas pressure in the accommodation space.

[0021] In an alternative embodiment, the cabinet body is provided with an exhaust system, the exhaust system comprising an electromagnetic exhaust valve, the electromagnetic exhaust valve being electrically connected with the air pressure sensor, when A-B>400pa, the electromagnetic exhaust valve is opened to reduce the air pressure in the accommodation space.

[0022] Beneficial effects: by setting the electromagnetic exhaust valve, when the air pressure in the accommodation space is too large, the air is automatically exhausted to reduce the air pressure.

[0023] In an alternative embodiment, the panel assembly further comprises an indicator light, the indicator light being electrically connected with the power module.

[0024] Beneficial effects: when the power module is powered on, the indicator light is lit, when the power module is powered off, the indicator light is extinguished, so that the operator can intuitively observe the running state of the power module.

[0025] In an alternative embodiment, the cabinet body is provided with a drain valve corresponding to the position of the bottom of the accommodation space, the drain valve having an open state to drain the condensed water in the accommodation space.

[0026] Beneficial effects: by setting the drain valve, the condensed water accumulated in the accommodation space is drained, avoiding the short circuit of the electrical appliances in the accommodation space contacting with the condensed water. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 Structure diagram of a positive pressure explosion-proof cabinet according to an embodiment of the present application Figure 1 ;

[0029] Figure 2 Structure diagram of a positive pressure explosion-proof cabinet according to an embodiment of the present application Figure 2 ;

[0030] Figure 3 For Figure 1 Partial structure of the positive pressure explosion-proof cabinet shown in Figure 8 is shown in Figure 9. Figure 1 ;

[0031] Figure 4 Structure diagram of a positive pressure explosion-proof cabinet according to an embodiment of the present application Figure 1 Structure diagram of a positive pressure explosion-proof cabinet according to an embodiment of the present application

[0032] Figure 5The utility model discloses a kind of positive pressure explosion-proof cabinet structure diagram of embodiment Figure 3 .

[0033] Mark explanation:

[0034] 1, cabinet body;2, indicator light;3, second observation window;4, display screen;5, positive pressure purging controller;6, exhaust system;7, incoming line sealing joint;8, drain valve;9, cooling system;10, outgoing line sealing joint;11, power module;12, air inlet valve;13, control button;14, airtight door;141, first observation window;15, buzzer. Specific implementation

[0035] To make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0036] The embodiment of the utility model will be described below in conjunction with Figures 1 to 5 .

[0037] According to the embodiment of the utility model, a kind of positive pressure explosion-proof cabinet is provided, comprising:

[0038] Cabinet body 1, its inside has accommodating space, and power module 11 is arranged in accommodating space, and panel assembly is arranged on the outer wall of cabinet body 1, and panel assembly includes control button 13;

[0039] Airtight door 14 is movably arranged on the outer wall of cabinet body 1, and airtight door 14 has the first state of closing to block control button 13 and the ambient environment of cabinet body 1, and the second state of opening to expose control button 13 to the ambient environment of cabinet body 1;

[0040] Incoming line sealing joint 7 is arranged on cabinet body 1, and power module 11 is suitable for being connected with power supply by power supply incoming line, and incoming line sealing joint 7 is used for incoming and outgoing power supply incoming line in cabinet body 1;

[0041] Outgoing line sealing joint 10 is arranged on cabinet body 1, and power module 11 is suitable for being connected with load by power supply outgoing line, and outgoing line sealing joint 10 is used for incoming and outgoing power supply outgoing line in cabinet body 1.

[0042] The positive pressure explosion-proof cabinet provided by the embodiment avoids the control button 13 from being in contact with the combustible gas around the cabinet body 1 at all times by arranging the sealing door 14. The power supply incoming line and the power supply outgoing line enter and exit the cabinet body 1 through the incoming line sealing joint 7 and the outgoing line sealing joint 10, so as to avoid the connection between the power supply incoming line and the power supply outgoing line and the positive pressure explosion-proof cabinet from being exposed to the combustible gas around the cabinet body 1, thereby reducing the security risks.

[0043] Specifically, the number of the power supply modules 11 is at least one. The number of the control buttons 13 is at least one, which is adapted to control the operation of the positive pressure explosion-proof cabinet through the control buttons 13. The cabinet body 1 comprises two equipment doors, which are opened to facilitate the maintenance of the components inside the accommodation space.

[0044] As a feasible implementation form, one end of the sealing door 14 is hinged to the cabinet body 1, and the other end is detachably connected to the sealing door 14 through a bolt. As an additional implementation form, the sealing door 14 is detachably connected to the cabinet body 1 through a bolt at least at opposite ends. When the control button 13 needs to be operated, the sealing door 14 is opened, and when the control button 13 does not need to be operated, the sealing door 14 is closed. After the positive pressure explosion-proof cabinet is powered on, an electric spark may be generated at the control button 13, and by avoiding the control button 13 from being exposed to the combustible gas around the cabinet body 1 for a long time, the security risks are reduced. The end face of the sealing door 14 towards the cabinet body 1 is provided with a sealing gasket, and the sealing door 14 is adapted to abut against the outer wall of the cabinet body 1 through the sealing gasket, thereby improving the sealing effect of the sealing door 14.

[0045] The power supply incoming line and the power supply outgoing line enter the cabinet body 1, so as to be adapted to arrange the connection between the power supply incoming line and the power supply outgoing line and the power supply module 11 inside the cabinet body 1, and seal the gap between the power supply incoming line and the power supply outgoing line and the cabinet body 1 through the incoming line sealing joint 7 and the outgoing line sealing joint 10, thereby avoiding the connection between the power supply incoming line and the power supply outgoing line and the positive pressure explosion-proof cabinet from being exposed to the combustible gas around the cabinet body 1, so as to reduce the security risks, wherein the incoming line sealing joint 7 and the outgoing line sealing joint 10 adopt the sealing joints (such as the gland) in the prior art.

[0046] In one embodiment, in combination with Figure 1 As shown, the first observation window 141 is arranged in the area of the sealing door 14 corresponding to the panel assembly.

[0047] The positive pressure explosion-proof cabinet provided by the embodiment is provided with the first observation window 141, so as to facilitate the observation of the condition of the panel assembly.

[0048] Specifically, the first observation window 141 is made of transparent materials such as glass or acrylic plate.

[0049] In one embodiment, in combination with Figure 1 , Figure 4 andFigure 5 As shown, the number of the outgoing line sealing joints 10 is at least two, and one power outgoing line is arranged at each outgoing line sealing joint 10. The number of the loads is matched with the number of the power outgoing lines, so as to be suitable for controlling the plurality of loads by the power module 11 through the plurality of power outgoing lines.

[0050] Specifically, the power module 11 can be connected with the load through one power outgoing line or through a plurality of power outgoing lines. As a feasible implementation form, two loads are arranged, and two groups of sealing joint groups are arranged on the cabinet 1. One group of sealing joint groups includes eight outgoing line sealing joints 10, four of which are connected with the positive electrode of the electrolytic cell of one load, and the other four are connected with the negative electrode of the electrolytic cell of the load. The other group of sealing joint groups includes eight outgoing line sealing joints 10, four of which are connected with the positive electrode of the electrolytic cell of the other load, and the other four are connected with the positive electrode of the electrolytic cell of the load.

[0051] In one embodiment, in combination with Figure 3 As shown, the second observation window 3 is arranged on the cabinet 1, and is suitable for observing the inside of the accommodation space through the second observation window 3.

[0052] The positive pressure explosion-proof cabinet provided in the embodiment is provided with the second observation window 3, so as to facilitate the operator to observe the running condition of the internal components of the accommodation space.

[0053] Specifically, the second observation window 3 is made of transparent materials such as glass or acrylic plate. The second observation window 3 can be arranged away from the sealing door 14, or can be arranged in the area covered by the sealing door 14. When the second observation window 3 is arranged in the area covered by the sealing door 14, the operator can observe the inside of the accommodation space through the first observation window 141 and the second observation window 3.

[0054] In one embodiment, in combination with Figure 1 and Figure 3 As shown, the positive pressure explosion-proof cabinet further includes a positive pressure purging controller 5, which is arranged on the cabinet 1 and communicates with the accommodation space. The positive pressure purging controller 5 is suitable for making the gas pressure in the accommodation space greater than the gas pressure of the environment around the cabinet 1.

[0055] The positive pressure explosion-proof cabinet provided in the embodiment makes the accommodation space maintain a positive pressure, i.e., the gas pressure in the accommodation space is greater than the gas pressure of the environment around the cabinet 1, so as to avoid the combustible gas outside from entering the accommodation space, thereby preventing the spark generated by the internal electrical appliances from igniting the combustible gas.

[0056] Specifically, the positive pressure purging controller 5 introduces the protective gas into the accommodating space, so that the accommodating space forms a safe small environment with positive pressure, thereby preventing the combustible hazardous gas from entering the accommodating space. It should be noted that the positive pressure purging controller 5 is a prior art, and thus the structure thereof will not be described herein.

[0057] In one embodiment, the air pressure in the accommodating space is defined as A, and the air pressure of the environment around the cabinet body 1 is defined as B, where 50 pa≤A-B≤400 pa.

[0058] The positive pressure explosion-proof cabinet provided in the embodiment limits the range of the air pressure difference between the inside and outside of the accommodating space, thereby avoiding the entry of the external combustible gas into the accommodating space, and avoiding the deformation and damage of the internal components of the accommodating space caused by the excessive air pressure.

[0059] Specifically, the cabinet body 1 is provided with an air inlet valve 12 connected with a gas source pipe. The air inlet valve is opened until 50 pa≤A-B≤400 pa is satisfied, and then the air inlet valve 12 is closed, and the positive pressure purging controller 5 is opened to maintain the positive pressure of the accommodating space.

[0060] In one embodiment, in combination with Figure 1 and Figure 3 As shown, the panel assembly further includes a display screen 4, and the accommodating space is provided with an air pressure sensor, and the display screen 4 is electrically connected with the air pressure sensor to display the air pressure in the accommodating space.

[0061] The positive pressure explosion-proof cabinet provided in the embodiment is provided with the display screen 4, so that the operator can intuitively observe the air pressure in the accommodating space.

[0062] Specifically, the operator is adapted to observe the state of the control button 13 and the display information of the display screen 4 through the first observation window 141. When A-B<100 pa, the display screen 4 displays low air pressure to alert the operator. The air pressure sensor is also electrically connected with the external power supply, and when A-B<50 pa, the external power supply stops supplying power to the power supply inlet through the power supply module 11.

[0063] In one embodiment, in combination with Figures 1 to 5 As shown, the cabinet body 1 is provided with an exhaust system 6, and the exhaust system 6 includes an electromagnetic exhaust valve 61 electrically connected with the air pressure sensor. When A-B>400 pa, the electromagnetic exhaust valve 61 is opened to reduce the air pressure in the accommodating space.

[0064] The positive pressure explosion-proof cabinet provided in the embodiment is provided with the electromagnetic exhaust valve 61, so that when the air pressure in the accommodating space is too large, the air is automatically exhausted to reduce the air pressure.

[0065] Specifically, the air pressure sensor is electrically connected with the electromagnetic exhaust valve 61 through the processor, the air pressure signal inside the accommodating space detected by the air pressure sensor is transmitted to the processor, the processor has pre-stored air pressure of the ambient environment of the cabinet 1, when A-B>400pa, the processor controls the electromagnetic exhaust valve 61 to open, so as to facilitate the exhaust to the outside, avoid the air pressure inside the accommodating space being too large, and damage the components inside the accommodating space. The exhaust system 6 further comprises an exhaust hand valve 62, so as to be opened by the operator according to the actual need to actively exhaust.

[0066] In one embodiment, in combination with Figure 3 As shown, the panel assembly further comprises an indicator lamp 2, which is electrically connected with the power module 11.

[0067] The positive pressure explosion-proof cabinet provided by the embodiment, when the power module 11 is powered on, the indicator lamp 2 is lit, and when the power module 11 is powered off, the indicator lamp 2 is extinguished, so that the operator can intuitively observe the running state of the power module 11.

[0068] Specifically, the indicator lamp 2 is also electrically connected with the processor, and the panel assembly further comprises a buzzer 15 electrically connected with the processor, when A-B<50pa or A-B>50pa, the indicator lamp 2 and the buzzer 15 respectively flash and emit sound to perform sound and light alarm.

[0069] In one embodiment, in combination with Figure 2 , Figure 4 and Figure 5 As shown, the cabinet 1 is provided with a drain valve 8 corresponding to the position of the bottom of the accommodating space, and the drain valve 8 has an open state to drain the condensed water in the accommodating space.

[0070] The positive pressure explosion-proof cabinet provided by the embodiment, by setting the drain valve 8, the condensed water accumulated in the accommodating space is drained, and the electrical appliances in the accommodating space are prevented from contacting the condensed water to cause short circuit.

[0071] Specifically, in order to avoid the temperature inside the accommodating space being too high, the positive pressure explosion-proof cabinet is further provided with a cooling system 9, which comprises a water inlet valve and a water outlet valve arranged on the cabinet 1, and a cooling water pipe coiled in the accommodating space, both ends of the cooling water pipe are communicated with the water inlet valve and the water outlet valve respectively, the water inlet valve and the water outlet valve are communicated with a cooling water tank outside the positive pressure explosion-proof cabinet through a communication water pipe, and a water pump is arranged on the communication water pipe to make the cooling water flow through the cooling water pipe. During the working process of the cooling system 9, the cooling water pipe forms condensed water, which drops to the bottom of the accommodating space. The drain valve 8 is opened to avoid the condensed water accumulated in the accommodating space and contacting the electrical appliances in the accommodating space to cause short circuit.

[0072] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitation to the embodiments. Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the present application.

Claims

1. A positive pressure explosion-proof cabinet, characterized in that, A cabinet (1) having an accommodating space inside, a power supply module (11) arranged in the accommodating space, a panel assembly comprising control buttons (13) arranged on the outer wall of the cabinet (1), a sealing door (14) movably arranged on the outer wall of the cabinet (1), the sealing door (14) having a first state of closing to block the control buttons (13) and the ambient environment of the cabinet (1) and a second state of opening to expose the control buttons (13) to the ambient environment of the cabinet (1), a wire sealing joint (7) arranged on the cabinet (1), the power supply module (11) being adapted to be connected to a power supply through a power supply wire, the wire sealing joint (7) being used for the power supply wire to enter and exit the cabinet (1), and a wire sealing joint (10) arranged on the cabinet (1), the power supply module (11) being adapted to be connected to a load through a power supply wire, the wire sealing joint (10) being used for the power supply wire to enter and exit the cabinet (1). The sealing door (14) is provided with a first observation window (141) corresponding to the area of the panel assembly. The number of the wire sealing joint (10) is at least two, one power supply wire is arranged at each wire sealing joint (10), and the number of the load is adapted to the number of the power supply wire, so that the power supply module (11) can control multiple loads through multiple power supply wires. The cabinet (1) is provided with a second observation window (3) for observing the inside of the accommodating space. The positive pressure explosion-proof cabinet further comprises a positive pressure purging controller (5) arranged on the cabinet (1) and communicating with the accommodating space, and the positive pressure purging controller (5) is adapted to make the air pressure in the accommodating space greater than the air pressure of the ambient environment of the cabinet (1).

2. A positive pressure explosion-proof cabinet according to claim 1, characterised in that, The air pressure in the accommodating space is defined as A, and the air pressure of the ambient environment of the cabinet (1) is defined as B, wherein 50pa≤A-B≤400pa.

3. The positive pressure explosion-proof cabinet of claim 1, wherein, The panel assembly further comprises a display screen (4), and a gas pressure sensor is arranged in the accommodating space, and the display screen (4) is electrically connected with the gas pressure sensor to display the air pressure in the accommodating space.

4. The positive pressure explosion-proof cabinet of claim 1, wherein, The cabinet (1) is provided with an exhaust system (6) comprising an electromagnetic exhaust valve (61), the electromagnetic exhaust valve (61) is electrically connected with the gas pressure sensor, and when A-B>400pa, the electromagnetic exhaust valve (61) is opened to reduce the air pressure in the accommodating space.

5. The positive pressure explosion-proof cabinet of claim 1, wherein, The panel assembly further comprises an indicator light (2) electrically connected with the power supply module (11).

6. A positive pressure explosion-proof cabinet according to claim 5, wherein, The cabinet (1) is provided with a drain valve (8) corresponding to the position of the bottom of the accommodating space, and the drain valve (8) has an open state of opening to drain the condensed water in the accommodating space.

7. The positive pressure explosion-proof cabinet of claim 5, wherein, ​ 8. A positive pressure explosion-proof cabinet according to claim 7, characterised in that, ​ 9. The positive pressure explosion-proof cabinet of claim 7, wherein, ​ 10. A positive pressure explosion-proof cabinet according to any one of claims 1 to 9, characterized in that, ​

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