Explosion-proof PLC control cabinet
By using technical means such as aggregate frames, porous plates and inert gas introduction in the PLC control cabinet, the internal oxygen content is reduced and the charge, heat and dust is taken away, which solves the problem of internal explosion of the PLC control cabinet due to the explosion of dust or gas mixture, and achieves higher safety and stability.
Patent Information
- Application Number
- CN202421474918.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-24
AI Technical Summary
When the sealing measures of the PLC control cabinet are not in place, internal explosions are prone to occur due to explosions of dust or gas mixtures.
An explosion-proof PLC control cabinet was designed, using technical means such as aggregate frames, porous plates, inert gas introduction and elastic parts to reduce the internal oxygen content through inert gas, remove charge, heat and dust, ensure that the internal combustion conditions do not meet the internal conditions, and prevent explosion from causing harm to personnel through the design of protective doors and elastic parts.
It effectively reduces the risk of explosion inside the PLC control cabinet, prevents explosions caused by static electricity, heat or dust, and prevents explosions caused by excessive temperatures through real-time temperature monitoring.
Smart Images
Figure CN222928659U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PLC devices, in particular to an explosion-proof PLC control cabinet. Background Technique
[0002] PLC, also known as programmable logic controller, uses a class of programmable memories to store programs internally, execute user-oriented instructions such as logical operations, sequential control, timing, counting, and arithmetic operations, and controls various types of machinery or production processes through digital or analog input / output, and can adapt to industrial automation control occasions of various scales, and is widely used in industries such as electric power, metallurgy, chemical industry, papermaking, and environmental protection sewage treatment.
[0003] During the operation of the PLC control cabinet, if the sealing measures are not implemented properly, dust or gas mixtures may enter the interior of the control cabinet. When the dust or flammable gas deposited in the cabinet reaches the explosion limit, if static electricity is generated inside or a spark is generated due to a circuit break, causing the dust or flammable gas deposited in the cabinet to come into contact with the ignition source, an explosion may occur inside the PLC control cabinet.
[0004] Therefore, it is necessary to develop an explosion-proof PLC control cabinet to solve the above problems. Content of the Utility Model
[0005] In order to overcome the drawback that when the dust or flammable gas deposited in the cabinet reaches the explosion limit, if static electricity is generated inside or the circuit is broken, causing the dust or flammable gas deposited in the cabinet to come into contact with the ignition source, an explosion may occur inside the PLC control cabinet, the utility model provides an explosion-proof PLC control cabinet.
[0006] The technical solution is: an explosion-proof PLC control cabinet, including a control cabinet body, a protective door, and a support frame. A plurality of discharge holes are opened at the top of the control cabinet body. One side of the control cabinet body is hingedly connected with a protective door. A support frame for installing PLC control components is installed inside the control cabinet body. It also includes a dust-proof cover, an aggregate frame, and a perforated plate. An aggregate frame is installed on the top of the control cabinet body. A dust-proof cover is installed above the aggregate frame. An air inlet is opened on the dust-proof cover. A perforated plate is slidably arranged between the aggregate frame and the control cabinet body. When the perforated plate slides, the holes on the perforated plate are aligned with the discharge holes.
[0007] As a further preferred solution, it further includes a connecting rod, a corrugated plate, a pressing rod, a connecting gripper, a positioning frame, a first elastic member, a connecting plate, a first guide rod and a second elastic member. One side of the porous plate is fixedly connected with a connecting plate, and two first guide rods are fixedly connected to one side of the aggregate frame. The connecting plate slides on the first guide rods, and a second elastic member is connected between the connecting plate and the first guide rods. A connecting rod is installed on the side of the porous plate away from the connecting plate, a positioning frame is installed on one side of the control cabinet body, a pressing rod is slidably arranged in the positioning frame, a corrugated plate is installed at one end of the pressing rod, the connecting rod slides and contacts the corrugated plate, and a connecting gripper is installed at the other end of the pressing rod. A first elastic member is connected between the connecting gripper and the positioning frame.
[0008] As a further preferred solution, it further includes a heat dissipation bar and an explosion-proof observation window. A heat dissipation bar is installed at the bottom inside the control cabinet body, and an explosion-proof observation window is installed on the embedded protection door.
[0009] As a further preferred solution, it further includes a limiting frame, a locking plate, a second guide rod and a third elastic member. A limiting frame is installed on one side of the control cabinet body, two second guide rods are slidably arranged on the limiting frame, and a locking plate is fixedly connected to the ends of the two second guide rods close to the protection door. The locking plate blocks the protection door, and two third elastic members are connected between the limiting frame and the locking plate.
[0010] As a further preferred solution, it further includes a mounting frame, a fan and a isolation net. A mounting frame is installed at the lower part of the control cabinet body, two fans are installed on the side of the mounting frame close to the heat dissipation bar, and a isolation net is installed on the front side of the mounting frame.
[0011] As a further preferred solution, it further includes a support base, a temperature display instrument, a connecting wire pipe and a temperature measuring rod. A support base is installed on the side of the control cabinet body away from the limiting frame, a temperature display instrument is placed in the support base, a connecting wire pipe is fixedly connected to one side of the temperature display instrument, the connecting wire pipe penetrates through the control cabinet body, and a temperature measuring rod is installed at the end of the connecting wire pipe located inside the control cabinet body.
[0012] As a further preferred solution, it further includes a protective shell, and a protective shell is arranged outside the temperature display instrument.
[0013] As a further preferred solution, it further includes an anti-static sleeve, and an anti-static sleeve is sleeved outside the temperature measuring rod.
[0014] Compared with the prior art, the utility model has the following advantages: 1. By introducing inert gas into the aggregate frame, pulling the connecting gripper to make the porous plate correspond to the discharge hole of the control cabinet, the inert gas enters the inside of the control cabinet body and then flows out through the bottom, thereby reducing the oxygen content inside the control cabinet body to prevent explosion. At the same time, it takes away the charge, heat, dust, etc. inside the control cabinet body, so that the conditions for combustion and explosion cannot be reached inside the control cabinet body.
[0015] 2. After the protective door is closed, under the action of the third elastic member, the locking plate resets to block the protective door, preventing an explosion inside the control cabinet body and protecting people from being injured by the explosion of the protective door.
[0016] 3. The temperature measuring rod measures the temperature inside the control cabinet body, and the temperature display instrument converts the data into digital information to achieve real-time monitoring of the temperature inside the control cabinet body and prevent an explosion due to excessive temperature inside the control cabinet body. Description of the Drawings
[0017] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model.
[0018] Figure 2 It is a three-dimensional sectional structure schematic diagram of the control cabinet body, explosion-proof observation window and protective door of the present utility model.
[0019] Figure 3 It is a three-dimensional sectional structure schematic diagram of the heat dissipation column, support frame and control cabinet body of the present utility model.
[0020] Figure 4 It is a three-dimensional sectional structure schematic diagram of the aggregate box, perforated plate and connecting rod of the present utility model.
[0021] Figure 5 It is a three-dimensional structure schematic diagram of the protective door, limit frame and locking plate of the present utility model.
[0022] Figure 6 It is a three-dimensional sectional structure schematic diagram of the limit frame and locking plate of the present utility model.
[0023] Figure 7 It is a three-dimensional sectional structure schematic diagram of the installation frame body, fan and isolation net of the present utility model.
[0024] Figure 8 It is a three-dimensional structure schematic diagram of the control cabinet body, support seat and temperature display instrument of the present utility model.
[0025] Figure 9 It is a three-dimensional sectional structure schematic diagram of the support seat, temperature display instrument and connecting wire pipe of the present utility model.
[0026] Wherein: 1 - control cabinet body, 101 - discharge hole, 102 - heat dissipation grid, 103 - dustproof cover, 104 - air inlet, 2 - protective door, 3 - explosion-proof observation window, 4 - support frame, 5 - aggregate box, 6 - perforated plate, 7 - connecting rod, 8 - corrugated plate, 9 - pressing rod, 10 - connecting gripper, 11 - positioning frame, 12 - first elastic member, 1201 - connecting plate, 1202 - first guide rod, 13 - second elastic member, 14 - limiting frame, 15 - locking plate, 16 - second guide rod, 17 - third elastic member, 18 - installation frame body, 19 - fan, 20 - isolation net, 21 - support seat, 22 - temperature display instrument, 23 - connecting wire pipe, 24 - temperature measuring rod, 25 - protective shell, 26 - anti-static sleeve. Detailed implementation manners
[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0028] Embodiment 1: An explosion-proof PLC control cabinet, referring to Figures 1 - 5 As shown in the figure, it includes a control cabinet body 1, a protective door 2 and a support frame 4. A plurality of discharge holes 101 are opened at the top of the control cabinet body 1. The protective door 2 is hinged to the front side of the control cabinet body 1. A support frame 4 for installing PLC control components is installed inside the control cabinet body 1. An aggregate box 5 is installed on the top of the control cabinet body 1 by means of bolt connection. A dustproof cover 103 is installed above the aggregate box 5 by means of bolt connection. An air inlet 104 is opened on the dustproof cover 103. A perforated plate 6 is slidably arranged between the aggregate box 5 and the control cabinet body 1. When the perforated plate 6 slides, the holes on the perforated plate 6 are aligned with the discharge holes 101. A connecting plate 1201 is fixedly connected to the left side of the perforated plate 6. Two first guide rods 1202 are fixedly connected to one side of the aggregate box 5. The connecting plate 1201 slides on the first guide rods 1202. A second elastic member 13 is connected between the connecting plate 1201 and the first guide rods 1202. A connecting rod 7 is installed on the side of the perforated plate 6 away from the connecting plate 1201. A positioning frame 11 is installed on one side of the control cabinet body 1. A pressing rod 9 is slidably arranged inside the positioning frame 11. A corrugated plate 8 is installed at one end of the pressing rod 9. The connecting rod 7 slides and contacts the corrugated plate 8. A connecting gripper 10 is installed at the other end of the pressing rod 9. A first elastic member 12 is connected between the connecting gripper 10 and the positioning frame 11.
[0029] Referring to Figure 3As shown, it also includes a heat dissipation bar 102 and an explosion-proof observation window 3. The heat dissipation bar 102 is installed on the bottom of the control cabinet 1 by bolt connection, and the explosion-proof observation window 3 is embedded in the protective door 2. The specific situation inside the control cabinet 1 can be observed through the explosion-proof observation window 3.
[0030] When the device is in operation, the staff connects the air duct to the air inlet 104 to introduce the inert gas into the aggregate frame 5. Then the staff pulls the connecting gripper 10, and the pressure rod 9 drives the corrugated plate 8 to slide downward along the positioning frame 11. The first elastic member 12 is stretched and deformed. During the downward sliding of the corrugated plate 8, the connecting rod 7 is squeezed by the corrugated plate 8, so that the connecting rod 7 slides along the corrugated plate 8. When the connecting rod 7 drives the porous plate 6 to slide and align with the discharge hole 101 on the top of the control cabinet 1, the porous plate 6 slides, and the second elastic member 13 is squeezed and deformed. At this time, the inert gas will enter the control cabinet 1. The inert gas flows inside the cabinet 1 and then flows out from the bottom of the control cabinet 1 through the heat dissipation bar 102. The inert gas can reduce the oxygen content inside the control cabinet 1 to prevent explosion, and at the same time take away the charge, heat and dust in the control cabinet 1, so that the control cabinet 1 does not meet the conditions for combustion and explosion. When there is no need to circulate the inert gas inside, the staff releases the connecting gripper 10, and the first elastic member 12 drives the pressure rod 9 to reset, so that the connecting rod 7 slides and resets along the corrugated plate 8, and the second elastic member 13 returns to its original state to drive the porous plate 6 to reset, so that the vent holes on the porous plate 6 are staggered with the discharge hole 101 at the top of the control cabinet 1.
[0031] Example 2: Based on Example 1, refer to Figure 2 and Figure 6 As shown, it also includes a limiting frame 14, a locking plate 15, a second guide rod 16 and a third elastic member 17. The limiting frame 14 is installed on the right side of the control cabinet 1 by bolt connection. Two second guide rods 16 are slidably arranged on the limiting frame 14. The left ends of the two second guide rods 16 are fixedly connected with the locking plate 15 by welding. The locking plate 15 blocks the protective door 2. Two third elastic members 17 are connected between the limiting frame 14 and the locking plate 15. The third elastic member 17 is sleeved on the second guide rod 16.
[0032] When the control cabinet needs to be repaired, the staff pulls the second guide rod 16 to the right, and the second guide rod 16 drives the locking plate 15 to slide to the right. The locking plate 15 squeezes the third elastic member 17 to deform, so that the locking plate 15 no longer blocks the protective door 2. Then the staff opens the protective door 2 to repair the device. After the repair is completed, the protective door 2 is closed and the second guide rod 16 is released. The third elastic member 17 returns to its original state and drives the locking plate 15 to reset and block the protective door 2 to prevent an explosion inside the control cabinet 1, which would cause the protective door 2 to explode and cause harm to personnel.
[0033] See alsoFigure 7 As shown in the figure, it further includes an installation frame body 18, a fan 19 and an isolation net 20. The installation frame body 18 is installed at the lower part inside the control cabinet body 1 by means of bolt connection. Two fans 19 are installed on one side of the installation frame body 18 close to the heat dissipation bar 102, and an isolation net 20 is installed on the front side of the installation frame body 18.
[0034] When the control cabinet introduces inert gas, the staff starts the fan 19, and the fan 19 evacuates and takes out the internal inert gas, so that the inert gas can more quickly take out substances such as charges, heat and dust in the control cabinet body 1, reducing the possibility of explosion inside the control cabinet body 1.
[0035] Refer to Figure 8 and Figure 9 As shown in the figure, it further includes a support seat 21, a temperature display instrument 22, a connecting wire pipe 23 and a temperature measuring rod 24. The support seat 21 is installed on the side of the control cabinet body 1 away from the limit frame 14. The temperature display instrument 22 is placed inside the support seat 21. A protective shell 25 is arranged outside the temperature display instrument 22 to prevent the temperature display instrument 22 from being damaged by impact during use. One side of the temperature display instrument 22 is fixedly connected with the connecting wire pipe 23. The connecting wire pipe 23 penetrates through the control cabinet body 1. One end of the connecting wire pipe 23 located inside the control cabinet body 1 is installed with the temperature measuring rod 24. An anti-static sleeve 26 is sleeved outside the temperature measuring rod 24, and the anti-static sleeve 26 absorbs the static electricity of the control cabinet body 1 to prevent the control cabinet body 1 from catching fire during use due to static electricity.
[0036] When the control cabinet is running, the temperature measuring rod 24 measures the temperature inside the control cabinet body 1, and then transmits the temperature data inside the control cabinet body 1 into the temperature display instrument 22 through the connecting wire pipe 23. The temperature display instrument 22 converts the data into digital information to achieve real-time monitoring of the temperature inside the control cabinet body 1 and prevent the control cabinet body 1 from exploding due to excessive internal temperature.
[0037] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.
Claims
1. An explosion-proof PLC control cabinet, comprising a control cabinet body (1), a protective door (2) and a support frame (4), wherein a plurality of discharge holes (101) are provided on the top of the control cabinet body (1), a protective door (2) is hingedly connected to one side of the control cabinet body (1), and a support frame (4) for installing a PLC control element is installed inside the control cabinet body (1), characterized in that: The invention also comprises a dust cover (103), a material collection frame (5) and a porous plate (6); the material collection frame (5) is installed on the top of the control cabinet (1); the dust cover (103) is installed above the material collection frame (5); an air inlet (104) is provided on the dust cover (103); a porous plate (6) is slidably arranged between the material collection frame (5) and the control cabinet (1); when the porous plate (6) slides, the holes on the porous plate (6) are aligned with the discharge holes (101).
2. An explosion-proof PLC control cabinet as claimed in claim 1, characterized in that: The invention also comprises a connecting rod (7), a corrugated plate (8), a pressure rod (9), a connecting gripper (10), a positioning frame (11), a first elastic member (12), a connecting plate (1201), a first guide rod (1202) and a second elastic member (13); a connecting plate (1201) is fixedly connected to one side of the porous plate (6); two first guide rods (1202) are fixedly connected to one side of the collecting frame (5); the connecting plate (1201) slides on the first guide rods (1202); the connecting plate (1201) and the first guide rods (1202) are connected to each other; 2), a second elastic member (13) is connected between the porous plate (6) and the connecting plate (1201), a connecting rod (7) is installed on the side of the porous plate (6) away from the connecting plate (1201), a positioning frame (11) is installed on one side of the control cabinet (1), a pressure rod (9) is slidably arranged in the positioning frame (11), a wave plate (8) is installed at one end of the pressure rod (9), the connecting rod (7) slides and contacts with the wave plate (8), a connecting gripper (10) is installed at the other end of the pressure rod (9), and a first elastic member (12) is connected between the connecting gripper (10) and the positioning frame (11).
3. An explosion-proof PLC control cabinet as claimed in claim 1, characterized in that: It also includes a heat dissipation bar (102) and an explosion-proof observation window (3). The heat dissipation bar (102) is installed at the bottom of the control cabinet (1), and the explosion-proof observation window (3) is installed on the embedded part of the protection door (2).
4. An explosion-proof PLC control cabinet as claimed in claim 1, characterized in that: The control cabinet (1) further comprises a limiting frame (14), a locking plate (15), a second guide rod (16) and a third elastic member (17). The limiting frame (14) is installed on one side of the control cabinet (1). Two second guide rods (16) are slidably arranged on the limiting frame (14). The two second guide rods (16) are fixedly connected to a locking plate (15) at one end close to the protective door (2). The locking plate (15) blocks the protective door (2). Two third elastic members (17) are connected between the limiting frame (14) and the locking plate (15).
5. The explosion-proof PLC control cabinet according to claim 1, characterized in that: The control cabinet (1) also includes an installation frame (18), a fan (19) and an isolation net (20). The installation frame (18) is installed at the lower part of the control cabinet (1), two fans (19) are installed on one side of the installation frame (18) close to the heat dissipation bar (102), and the isolation net (20) is installed on the front side of the installation frame (18).
6. An explosion-proof PLC control cabinet as claimed in claim 4, characterized in that: The control cabinet (1) further comprises a support base (21), a temperature display instrument (22), a connecting wire tube (23) and a temperature measuring rod (24); the support base (21) is installed on a side of the control cabinet (1) away from the limiting frame (14); the temperature display instrument (22) is placed in the support base (21); a connecting wire tube (23) is fixedly connected to one side of the temperature display instrument (22); the connecting wire tube (23) passes through the control cabinet (1); and a temperature measuring rod (24) is installed on one end of the connecting wire tube (23) located in the control cabinet (1).
7. An explosion-proof PLC control cabinet as claimed in claim 6, characterized in that: It also includes a protective shell (25), and the protective shell (25) is arranged outside the temperature display instrument (22).
8. An explosion-proof PLC control cabinet as claimed in claim 6, characterized in that: It also includes an antistatic sleeve (26), and the antistatic sleeve (26) is sleeved on the outer side of the temperature measuring rod (24).