Mining intrinsic safety type sampling control box

Abstract

The utility model discloses a mining intrinsic safety type sampling control box, which relates to the technical field of mining control boxes and comprises a base, a control box body is arranged at the top of the base, a concentric-square-shaped pressing plate is arranged at the bottom of the control box body, a concentric-square-shaped sealing strip is arranged at the bottom end of the concentric-square-shaped pressing plate, and a concentric-square-shaped groove matched with the concentric-square-shaped sealing strip is formed in the top of the base. A two-way lead screw is rotationally connected into the base, and two swing assemblies are arranged in the base. The swing assembly comprises two fixing blocks, the fixing blocks are fixedly installed at the bottom end of the inner wall of the base, a swing plate is rotationally connected between the two fixing blocks, a pressing strip is arranged at the top of the swing plate, and a pressing column is arranged at the bottom of the pressing strip; the anti-explosion sampling control box has the beneficial effects that the base and the control box body play a good sealing role in the vertical direction, the sealing performance of the sampling control box is improved, fine dust is prevented from entering the control box, and the anti-explosion performance of the control box is guaranteed.

Description

Technical Field

[0001] The utility model relates to a control box for mining, in particular to an intrinsically safe sampling control box for mining, and belongs to the technical field of safety of controlling multi-point sampling and gas extraction by a bundled tube monitoring system for a coal mine fire. Background Art

[0002] At present, the automation of coal mine comprehensive mining working faces is the development trend of digital mine construction, and safety supervision departments at all levels have put forward higher requirements for coal mine fire bundle pipe monitoring systems. Guided by "prevention first, prevention and control combined", it is necessary to establish a relatively advanced coal mine underground natural combustion bundle pipe monitoring system to ensure coal mine production and employee personal safety and prevent coal mine fire accidents. When operating in the control multi-point prevention and control area, an intrinsically safe sampling control box is generally used. Since coal production is mainly carried out underground, there is a harsh working environment (small working area, poor lighting, humidity, corrosiveness), and many unsafe factors (mainly threats of accidents such as water, fire, gas, and roof), and the transportation, installation, and commissioning between personnel and equipment require high coordination. Information transmission must be timely and accurate. The safety of underground communication equipment must be highly valued, especially electronic components, which must be installed in a dedicated intrinsically safe control box to completely isolate them from the air in the mine.

[0003] Among them, the "mine explosion-proof control box" disclosed by the application number "CN202320972239.X" "comprises a base, the bottom surface of the base is provided with a square opening, the inner wall of the square opening is inlaid with two groups of bearings, the inner rings of each group of the bearings are respectively fixedly connected to the threaded rods, the outer surfaces of the two threaded rods are threadedly connected with a group of moving blocks, the upper surface of the base is provided with a rectangular slot, and the inner top wall of the rectangular slot is provided with two groups of through openings". In the utility model, by dividing the base and the control box body into two major parts, when the staff needs to inspect the electrical components in the control box, the staff only needs to rotate the two screwing heads to disengage the two groups of L-shaped blocks from the card holes respectively to complete the disassembly of the base and the control box body. In this way, the staff can quickly remove the control box body from the base, which is convenient for the staff to inspect the electrical components on the base. Moreover, the base and the control box body are closely matched and have a good protective effect.

[0004] However, the above method still has the following defects: the effect of dustproof and underground environmental humidity protection is achieved by setting a sealing gasket between the base and the control box body, but the contact between the control box body and the base with the sealing gasket in the vertical direction is not reliable, which may affect the sealing of the control box, allowing fine dust and underground environmental humidity to enter the interior of the control box, making it difficult to ensure the explosion-proof and intrinsic safety performance of the control box. Utility Model Content

[0005] The purpose of the utility model is to provide an intrinsically safe sampling control box for mining, so as to solve the problem that the control box body and the base are in unreliable contact with the sealing gasket in the vertical direction proposed in the above-mentioned background technology, which may affect the sealing of the control box, allowing fine dust and the ambient humidity underground to enter the interior of the control box, making it difficult to ensure the explosion-proof and intrinsic safety performance of the control box.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mining intrinsically safe sampling control box, comprising a base, a control box body is provided on the top of the base, a circular pressure plate is provided on the bottom of the control box body, a circular sealing strip is provided on the bottom end of the circular pressure plate, a circular groove matching the circular sealing strip is provided on the top of the base, a bidirectional screw rod is rotatably connected inside the base, and two swing components are provided inside the base; the swing component comprises two fixed blocks, the fixed blocks are fixedly mounted on the bottom end of the inner wall of the base, a swing plate is rotatably connected between the two fixed blocks, a pressure strip is provided on the top of the swing plate, a pressure column is provided on the bottom of the pressure strip, and both ends of the bidirectional screw rod are threadedly connected with extrusion blocks through screw nuts.

[0007] As a preferred technical solution of the utility model, a fixed box is provided on one side of the base, a limiting assembly is provided inside the fixed box, the top of one side of the extrusion block contacts the surface of the swing plate, and the bottom end of the pressure column contacts the surface of the circular pressure plate.

[0008] As a preferred technical solution of the utility model, both ends of the bidirectional screw rod are sleeved with return springs, one end of the return spring is fixedly connected to the inner wall of the base, and the other end of the return spring is fixedly connected to one side of the swing plate.

[0009] As a preferred technical solution of the utility model, the limit assembly includes a rotating rod, which is rotatably connected to the inside of the fixed box, a worm gear is provided at one end of the rotating rod, one end of the bidirectional screw rod passes through the base and the fixed box and is fixedly connected to one end of the worm gear, a worm is rotatably connected to the inside of the fixed box, the worm wheel and the worm are meshedly connected, and one end of the worm passes through the fixed box and is fixedly connected to a knob arranged outside the fixed box.

[0010] As a preferred technical solution of the utility model, an arc-shaped swinging groove corresponding to the bidirectional screw rod is provided at the bottom of the swinging plate, and rectangular grooves corresponding to the swinging plate are provided on both sides of the top of the base.

[0011] As a preferred technical solution of the utility model, a sealing door is provided on the surface of the control box body, buckle blocks are provided in the middle of both sides of the control box body, and buckle grooves are provided at the bottom of the buckle blocks.

[0012] As a preferred technical solution of the utility model, a slider is provided at the bottom end of the extrusion block, a slide groove matching the slider is provided at the bottom end of the inner wall of the base, and the slider is slidably connected to the slide groove.

[0013] As a preferred technical solution of the utility model, a first mounting plate is provided on one side of the base, and first mounting holes are provided on the four corners of the surface of the first mounting plate. A second mounting plate is provided at the bottom end of the base, and second mounting holes are provided on the four corners of the surface of the second mounting plate.

[0014] Compared with the related art, the mining intrinsically safe sampling control box provided by the utility model has the following beneficial effects:

[0015] 1. The two extrusion blocks are driven to move in opposite directions along the direction of the two-way screw by rotating the two-way screw rod. The swing plates that are in mutual extrusion contact and the fixed blocks in the swing assembly are cooperated to make the swing plates swing and rotate. The pressure strips and pressure columns are closely extruded and contacted with the circular pressure plates. The circular sealing strips and circular grooves are cooperated to make the base and the control box body have a good sealing effect in the vertical direction, thereby improving the sealing of the sampling control box, preventing fine dust and environmental humidity in the well from entering the interior of the control box, and ensuring the explosion-proof and intrinsic safety performance of the control box.

[0016] 2. The worm is driven to rotate by setting a knob, and the rotating rod and worm wheel in the fixed component are cooperated to drive the rotation of the worm wheel and the bidirectional lead screw, and at the same time, the rotation of the bidirectional lead screw can have a self-locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the circular pressing plate of the utility model;

[0019] Figure 3 This is a schematic diagram of the exploded structure of the base of the utility model;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the swing assembly of the utility model;

[0021] Figure 5 It is a schematic diagram of the explosion structure of the limit assembly of the utility model;

[0022] Figure 6 This is a principle block diagram of the utility model.

[0023] In the figure: 1. base; 2. control box body; 3. circular pressure plate; 4. circular sealing strip; 5. circular groove; 6. bidirectional screw; 7. swing assembly; 701. fixed block; 702. swing plate; 703. pressure strip; 704. pressure column; 705. extrusion block; 706. reset spring; 707. arc swing groove; 8. fixed box; 9. limit assembly; 901. rotating rod; 902. worm gear; 903. worm; 904. knob; 10. buckle block; 11. sealing door; 12. first mounting plate; 13. second mounting plate; 14. rectangular groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] See also Figure 1-6 The utility model provides a mining intrinsically safe sampling control box, including a base 1, a control box body 2 is arranged on the top of the base 1, a back-shaped pressing plate 3 is arranged on the bottom of the control box body 2, and a back-shaped sealing strip 4 is arranged on the bottom end of the back-shaped pressing plate 3. By arranging the back-shaped sealing strip 4 between the control box body 2 and the back-shaped pressing plate 3, it is convenient to seal the connection between the two. A back-shaped groove 5 matching the back-shaped sealing strip 4 is opened on the top of the base 1. A bidirectional screw rod 6 is rotatably connected inside the base 1, and two swing components 7 are arranged inside the base 1;

[0027] The swing assembly 7 includes two fixed blocks 701, which are fixedly installed at the bottom end of the inner wall of the base 1. A swing plate 702 is rotatably connected between the two fixed blocks 701. A pressure strip 703 is provided on the top of the swing plate 702, and a pressure column 704 is provided on the bottom of the pressure strip 703. Both ends of the bidirectional screw rod 6 are threadedly connected with extrusion blocks 705 through screw nuts. By driving the bidirectional screw rod 6 to rotate and cooperating with the set screw nuts, the two extrusion blocks 705 are driven to contact and extrude one side of the swing plate 702, thereby facilitating the swing plate 702, the pressure strip 703 and the pressure column 704 to swing, so that the pressure column 704 squeezes and fixes the circular pressure plate 3, thereby facilitating improving the sealing between the control box body 2 and the base 1.

[0028] Both ends of the bidirectional screw rod 6 are sleeved with a return spring 706, one end of the return spring 706 is fixedly connected to the inner wall of the base 1, and the other end of the return spring 706 is fixedly connected to one side of the swing plate 702. By providing the return spring 706 at both ends of the bidirectional screw rod 6, it is convenient to make the swing plate 702 swing and reset without being affected by the extrusion block 705, so that the pressure column 704 and the circular pressure plate 3 are separated from each other, so that the control box body 2 is easy to disassemble and its internal components are convenient for inspection and maintenance;

[0029] The bottom of the swing plate 702 is provided with an arc-shaped swing groove 707 corresponding to the bidirectional screw rod 6. The arc-shaped swing groove 707 provided at the swing plate 702 facilitates the swing plate 702 to be free from any restriction during the swinging process. Both sides of the top of the base 1 are provided with rectangular grooves 14 corresponding to the swing plate 702, so that the swing plate 702 is not affected during the swinging and pressing process.

[0030] A sealing door 11 is provided on the surface of the control box body 2, and buckle blocks 10 are provided in the middle of both sides of the control box body 2. Buckle grooves are provided at the bottom of the buckle blocks 10. The sealing door 11 provided at the control box body 2 facilitates sealing the interior of the control box. At the same time, buckle blocks 10 and buckle grooves are provided on the surface of the control box body 2, which makes it convenient to lift, remove and disassemble the control box body 2, making it more convenient to use.

[0031] Embodiment 2:

[0032] A fixing box 8 is provided on one side of the base 1, and a limiting component 9 is provided inside the fixing box 8. The limiting component 9 is provided to facilitate limiting the bidirectional screw rod 6 to prevent it from rotating. The top of one side of the extrusion block 705 is in contact with the surface of the swing plate 702. The top of the extrusion block 705 is in contact with the swing plate 702. The extrusion block 705 is moved to facilitate driving the swing plate 702 to swing. The bottom end of the pressure column 704 is in contact with the surface of the circular pressure plate 3. The pressure column 704 is used to squeeze the surface of the circular pressure plate 3, thereby improving the sealing effect between the control box body 2 and the base 1.

[0033] The limiting assembly 9 includes a rotating rod 901, which is rotatably connected to the inside of the fixed box 8. A worm wheel 902 is provided at one end of the rotating rod 901. One end of the bidirectional lead screw 6 passes through the base 1 and the fixed box 8 and is fixedly connected to one end of the worm wheel 902. A worm 903 is rotatably connected to the inside of the fixed box 8. The worm wheel 902 and the worm 903 are meshingly connected. One end of the worm 903 passes through the fixed box 8 and is fixedly connected to a knob 904 provided on the outside of the fixed box 8. The worm 903 is driven to rotate by the provided knob 904, and the meshing worm wheel 902 is cooperated to drive the bidirectional lead screw 6 to rotate in the forward and reverse directions. The worm 903 and the worm wheel 902 are provided with a self-locking function, thereby limiting the bidirectional lead screw 6.

[0034] A slider is provided at the bottom end of the extrusion block 705, and a slide groove matching the slider is provided at the bottom end of the inner wall of the base 1. The slider and the slide groove are slidably connected. By providing a slider at the bottom of the extrusion block 705, the two extrusion blocks 705 play a role of limiting and guiding when they move toward each other.

[0035] A first mounting plate 12 is provided on one side of the base 1, and first mounting holes are provided on the four corners of the surface of the first mounting plate 12. A second mounting plate 13 is provided on the bottom end of the base 1, and second mounting holes are provided on the four corners of the surface of the second mounting plate 13. By arranging the first mounting plate 12 and the second mounting plate 13 longitudinally or transversely, in conjunction with the first mounting holes and the second mounting holes, the control box can be conveniently installed at different positions, and it is more flexible to use and install.

[0036] When in use, first, place the intrinsically safe sampling control box at the workplace, then use the first mounting hole at the first mounting plate 12 or the second mounting hole at the second mounting plate 13 to install the control box at different positions as needed. After the installation is completed, when the staff needs to maintain the electrical components inside the control box body 2, the worm 903 is driven to rotate by turning the knob 904, and the worm gear 902 is cooperated to facilitate the rotation of the bidirectional lead screw 6. The lead screw nut and the slider are cooperated to make the two extrusion blocks 705 move in opposite directions along the bidirectional lead screw 6 at the same time, so that the two extrusion blocks 705 are close to each other. Under the action of the reset spring 706, the two swing plates 702 are supported and squeezed, so that the two swing plates 702 are reset. At this time, the pressure column 704 at the bottom of the pressure strip 703 is separated from the surface of the circular pressure plate 3. With the setting of the buckle block 10 and the buckle groove, the control box body 2 can be removed and separated from the base 1, and the electrical components on the top of the base 1, i.e., inside the control box body 2, can be maintained.

[0037] When the control box body 2 needs to be installed, repeat the above steps to engage the circular sealing strip 4 at the bottom of the control box body 2 with the circular groove 5, and by reversely twisting the knob 904, the two extrusion blocks 705 move in opposite directions at the same time, so that the two swing plates 702 rotate, and the installation of the control box body 2 is completed by squeezing the swing plates 702 by the extrusion blocks 705. The surface of the circular pressure plate 3 is squeezed by the pressure strip 703 and the pressure column 704, so that the base 1, the circular sealing strip 4 and the control box body 2 have a good sealing effect in the vertical direction, thereby improving the sealing of the sampling control box, preventing fine dust and environmental humidity downhole from entering the interior of the control box, and ensuring the explosion-proof and intrinsic safety performance of the control box.

[0038] It is particularly important to note that the purpose of preventing and controlling coal spontaneous combustion is achieved by strengthening the design of multi-point gas distributed sampling technology in the fire prevention and extinguishing area; the intrinsically safe sampling control box uses PLC to control multi-point sampling, and single-point single-channel sampling is performed each time. The sampling time can be set and circulated point by point; the sampling point gas is extracted through a gas sampling pump, and the analysis point sample gas is controlled by a solenoid valve. When the sampling point gas does not need to be detected, it is discharged to the outside through the bus. When analysis is required, the corresponding solenoid valve of the sampling point gas is opened to transport the gas to the monitoring and analysis host; the sampling point gas will be filtered for dust and water when entering the monitoring host, and the dust and water filtration time can be set; it will save a lot of manpower and material resources in on-site applications, and greatly improve the level of automation, informatization and modern management of enterprises; it provides a scientific basis for the prevention and control of coal mine spontaneous combustion fires, mine gas accidents, mine gas monitoring and ventilation management, reduces the probability of mine fires and gas explosions, and thus reduces mine casualties.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mining intrinsically safe sampling control box, comprising a base (1), characterized in that: A control box body (2) is provided on the top of the base (1), a circular pressure plate (3) is provided on the bottom of the control box body (2), a circular sealing strip (4) is provided at the bottom end of the circular pressure plate (3), a circular groove (5) matching the circular sealing strip (4) is provided on the top of the base (1), a bidirectional screw rod (6) is rotatably connected inside the base (1), and two swing components (7) are provided inside the base (1); The swing assembly (7) comprises two fixed blocks (701), wherein the fixed blocks (701) are fixedly mounted on the bottom end of the inner wall of the base (1), and a swing plate (702) is rotatably connected between the two fixed blocks (701). A pressure strip (703) is provided on the top of the swing plate (702), and a pressure column (704) is provided on the bottom of the pressure strip (703). Both ends of the bidirectional screw rod (6) are threadedly connected to an extrusion block (705) via a screw rod nut.

2. The intrinsically safe sampling control box for mining according to claim 1 is characterized in that: A fixing box (8) is provided on one side of the base (1), a limiting assembly (9) is provided inside the fixing box (8), the top of one side of the extrusion block (705) is in contact with the surface of the swing plate (702), and the bottom end of the pressure column (704) is in contact with the surface of the circular pressure plate (3).

3. The intrinsically safe sampling control box for mining according to claim 1 is characterized in that: Both ends of the bidirectional screw rod (6) are sleeved with a return spring (706), one end of the return spring (706) is fixedly connected to the inner wall of the base (1), and the other end of the return spring (706) is fixedly connected to one side of the swing plate (702).

4. The intrinsically safe sampling control box for mining according to claim 2 is characterized in that: The limit assembly (9) comprises a rotating rod (901), the rotating rod (901) is rotatably connected to the interior of the fixed box (8), one end of the rotating rod (901) is provided with a worm wheel (902), one end of the bidirectional screw rod (6) passes through the base (1) and the fixed box (8) and is fixedly connected to one end of the worm wheel (902), the interior of the fixed box (8) is rotatably connected to a worm (903), the worm wheel (902) and the worm (903) are meshingly connected, and one end of the worm (903) passes through the fixed box (8) and is fixedly connected to a knob (904) provided outside the fixed box (8).

5. The mining intrinsically safe sampling control box according to claim 1 is characterized in that: The bottom of the swing plate (702) is provided with an arc-shaped swing groove (707) corresponding to the bidirectional screw rod (6), and both sides of the top of the base (1) are provided with rectangular grooves (14) corresponding to the swing plate (702).

6. The intrinsically safe sampling control box for mining according to claim 1 is characterized in that: A sealing door (11) is provided on the surface of the control box body (2), buckle blocks (10) are provided in the middle of both sides of the control box body (2), and buckle grooves are provided at the bottom of the buckle blocks (10).

7. The intrinsically safe sampling control box for mining according to claim 1 is characterized in that: A sliding block is provided at the bottom end of the extrusion block (705), and a sliding groove matching the sliding block is provided at the bottom end of the inner wall of the base (1), and the sliding block and the sliding groove are slidably connected.

8. The intrinsically safe sampling control box for mining according to claim 1 is characterized in that: A first mounting plate (12) is provided on one side of the base (1), and first mounting holes are provided at four corners of the surface of the first mounting plate (12); a second mounting plate (13) is provided at the bottom end of the base (1), and second mounting holes are provided at four corners of the surface of the second mounting plate (13).

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