Positive pressure explosion-proof controller

Abstract

The invention relates to the technical field of explosion-proof boxes, and discloses a positive pressure explosion-proof controller which comprises a box body, a box cover, a contactor and a touch screen assembly, an installation bottom plate is arranged on the inner side wall of the center of the bottom of the box body, the contactor is fixed to the installation bottom plate, the touch screen assembly is installed on the side wall of one side in the box body, and an electromagnetic valve assembly is installed on the other side in the box body. The touch screen assembly comprises a touch screen, a transparent part, a rubber gasket and a glass pressing plate, a box cover is fixedly connected to the box body through a screw and a spring gasket, and an O-shaped sealing ring is arranged between the box body and the box cover. The touch screen assembly is installed on the box body of the device, original button operation is replaced, punching is not needed in the box body, the anti-explosion grade of the device is improved, the electromagnetic valve assembly is integrated in the box body, the device is simple in structure, and the trouble that a wire is led into the device is avoided. The electromagnetic valve assembly is arranged in the box body, an anti-explosion box body does not need to be arranged outside the box body, cost is saved, and the overall structural size of the device is small.

Description

Technical Field

[0001] The present invention relates to the field of explosion-proof boxes, and particularly to a positive pressure explosion-proof controller. Background Art

[0002] In the prior art, pressure measuring elements such as pressure measuring tubes need to be arranged inside the explosion-proof box. The pressure outside the box must be led to the inside of the box through air pipes and explosion-proof sintered sheets. The sintered sheets have a large density and cannot accurately transmit the pressure, and have a small density and cannot achieve the explosion-proof effect. Moreover, the explosion-proof box of the existing device is operated by buttons. The button operation must be perforated on the box body and transmitted through a transmission shaft to push the button. However, there is a gap between the hole and the shaft, which is easy to transmit explosion, and the explosion-proof effect of the box body needs to be improved.

[0003] The patent application with the publication number CN 220653781U discloses an explosion-proof instrument box, including a base, including an explosion-proof box body. The front end of the explosion-proof box body is connected with a box cover through bolts. A display board is arranged on the upper part of the box cover, and a plurality of buttons are arranged on the lower part of the box cover. A label card block is arranged above each button. A wiring port is arranged at the top end of the explosion-proof box body. A plug is threadedly connected inside the wiring port. A wire management mechanism is arranged at the rear position of the top end of the explosion-proof box body. The wire management mechanism includes a movable clamp block and a protective sleeve. The inner diameter of the protective sleeve matches the outer diameter of the wiring port, and the protective sleeve is stuck outside the wiring port. The inner side of the movable clamp block is attached to the rear position of the outer circle of the protective sleeve. A fixed clamp plate matching the movable clamp block is installed at the outer circle of the protective sleeve at the top end of the explosion-proof box body and away from the movable clamp block.

[0004] This prior art is operated by buttons. The button operation must be perforated on the box body and transmitted through a transmission shaft to push the button. However, there is a gap between the hole and the shaft, which is easy to transmit explosion, and the explosion-proof effect of the box body needs to be improved.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a positive pressure explosion-proof controller, which replaces the original button operation by setting a touch screen, does not need to be perforated on the box body, improves the explosion-proof grade of the device, and the device adopts intrinsically safe explosion-proof, reduces the installation of pressure measuring elements inside the device, and has high explosion-proof performance of the box body.

[0007] The technical solution adopted by the present invention is: The positive pressure explosion-proof controller includes a box body, a box cover, a contactor, a touch screen assembly, and a solenoid valve assembly. An installation base plate is provided on the inner side wall of the center of the bottom of the box body, and a contactor is fixed on the installation base plate. The touch screen assembly is installed on the side wall on one side inside the box body, and the solenoid valve assembly is installed on the other side inside the box body. The touch screen assembly includes a touch screen, a transparent part, a rubber gasket, and a glass pressing plate. The box cover is fixedly connected to the box body through screws and spring washers, and an O-ring seal is provided between the box body and the box cover.

[0008] By adopting the above structure, the touch screen assembly is installed on the box body, replacing the original button operation. There is no need to drill holes on the box body, improving the explosion-proof level of the device. And the solenoid valve assembly is integrated inside the box body, with a simple device structure, avoiding the cumbersome introduction of wires into the device.

[0009] Preferably, the touch screen is attached to the touch screen window on the side of the box body, located in the installation inner frame inside the box body, and is pressed and set through the transparent part in the installation inner frame. The edge of the transparent part and the installation inner frame is a bonding joint surface.

[0010] Preferably, a glass pressing plate is fixedly provided at the outer edge of the installation inner frame through bolts. A rubber gasket is provided between the inner circle of the glass pressing plate and the edge of the transparent part. A circuit board is provided beside the installation inner frame inside the box body.

[0011] By adopting the above structure, the touch screen is installed on the box body through the multiple superposition and pressing fixation of the transparent part and the glass pressing plate. The touch screen is firmly installed, and each component is tightly pressed and installed without gaps, with good structural sealing, high explosion-proof performance of the box body, and convenient use.

[0012] Preferably, the solenoid valve assembly includes an electromagnetic coil, a moving iron core, a fixed iron core, and a copper sleeve. The fixed iron core and the moving iron core are installed to move up and down, assembled inside the electromagnetic coil. The lower end of the fixed iron core is threadedly connected to the box body, and a sealing gasket is provided at the connection. The lower end of the moving iron core is arranged on the top of the copper sleeve.

[0013] Preferably, the side of the copper sleeve is a gas source inlet provided on the side wall of the box body, and below the copper sleeve is a gas source outlet on the side wall of the box body.

[0014] By adopting the above structure, the solenoid valve assembly is arranged inside the box body, without the need to install an explosion-proof box body outside the box body, saving costs, and the overall structure volume of the device is small.

[0015] Preferably, a differential pressure joint assembly is connected to the outer wall of the box body, and a product nameplate is provided on the box cover.

[0016] By adopting the above structure, the pressure measuring element is installed outside the explosion-proof box body. The device adopts intrinsic safety explosion-proof, reducing the installation of the pressure measuring element inside the device, which is both safe and solves the problem of difficult control of the sintered sheet density in the original device, with high explosion-proof performance of the box body.

[0017] Preferably, a grounding mark is fixed beside the mounting base plate of the box body by a cross recessed pan head screw, and a spring washer is provided between the cross recessed pan head screw and the grounding mark.

[0018] Preferably, a throttle valve assembly and an explosion-proof stuffing box are connected to the side wall of the box body.

[0019] By adopting the above structure, each component of the box body is integrally arranged, the overall structure of the device is simple, and the performance is reliable.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The touch screen assembly is installed on the box body of the device of the present invention, replacing the original button operation. There is no need to drill holes on the box body, which improves the explosion-proof level of the device. And the solenoid valve assembly is integrated inside the box body, the structure of the device is simple, and the trouble of introducing wires into the device is avoided.

[0021] 2. The touch screen of the device of the present invention is fixed by the multiple superposition and pressing of the transparent part and the glass pressing plate. The touch screen is installed on the box body, the installation of the touch screen is stable, and each component is tightly installed without gaps, the structural sealing performance is good, the explosion-proof performance of the box body is high, and it is convenient to use.

[0022] 3. The solenoid valve assembly of the device of the present invention is arranged inside the box body, there is no need to additionally install an explosion-proof box outside the box body, which saves costs, and the overall structure volume of the device is small.

[0023] 4. The device of the present invention adopts intrinsically safe explosion-proof, reduces the installation of the pressure measuring components inside the device, is safe, and also solves the problem that it is difficult to control the density of the sintered sheet in the original device. The explosion-proof performance of the box body is high, and each component of the box body is integrally arranged, the overall structure of the device is simple, and the performance is reliable. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the device of the present invention; Figure 2 It is a schematic structural diagram of the electromagnetic coil of the device of the present invention; Figure 3 It is a schematic structural diagram of the fixed iron core of the device of the present invention; Figure 4 It is a schematic structural diagram of the moving iron core of the device of the present invention; Figure 5 It is a schematic structural diagram of the device of the present invention after removing the box cover; Figure 6 It is a schematic position diagram of the differential pressure joint assembly of the device of the present invention; Figure 7 It is a schematic structural diagram of the differential pressure joint assembly of the device of the present invention.

[0025] Wherein: 1. Box cover; 2. O-ring seal; 3. Box body; 4. Electromagnetic coil; 41. Moving iron core; 42. Fixed iron core; 5. Sealing gasket; 6. Copper sleeve; 7. Differential pressure joint assembly; 8. Contactor; 9. Screw; 10. Spring washer; 11. Cross recessed pan head screw; 12. Throttle valve assembly; 13. Explosion-proof stuffing box; 14. Touch screen; 15. Transparent part; 16. Rubber gasket; 17. Glass pressing plate; 18. Circuit board; 19. Touch screen window; 20. Bonding joint surface; 21. Grounding mark; 22. Product nameplate; 23. Mounting base plate; 24. Inner mounting frame; 25. Air source inlet; 26. Air source outlet. Detailed implementation mode

[0026] As Figures 1-7 shown, the positive pressure explosion-proof controller includes components such as a box body 3, a box cover 1, a contactor 8, a touch screen assembly, a solenoid valve assembly, a throttle valve assembly 12, and an explosion-proof stuffing box 13. On the inner side wall of the center of the bottom of the box body 3, there is a mounting base plate 23, and a contactor 8 is fixed on the mounting base plate 23. On one side wall inside the box body 3, a touch screen assembly is installed, and on the other side inside the box body 3, a solenoid valve assembly is installed. The touch screen assembly includes a touch screen 14, a transparent part 15, a rubber gasket 16, and a glass pressing plate 17. The box body 3 is connected and fixed to the box cover 1 through screws 9 and spring washers 10. An O-ring seal 2 is provided between the box body 3 and the box cover 1, and a product nameplate 22 is provided on the box cover 1.

[0027] As Figure 1 shown, the touch screen 14 is attached to the touch screen window 19 on the side of the box body 3, located in the inner mounting frame 24 inside the box body 3, and is pressed and set through the transparent part 15 in the inner mounting frame 24. The bonding joint surface 20 is between the edge of the transparent part 15 and the inner mounting frame 24. The outer edge of the mouth of the inner mounting frame 24 is fixedly provided with a glass pressing plate 17 through bolts. A rubber gasket 16 is between the inner circle of the glass pressing plate 17 and the edge of the transparent part 15. A circuit board 18 is provided inside the box body beside the inner mounting frame. The touch screen assembly is installed on the box body 3, replacing the original button operation. There is no need to punch holes on the box body 3, improving the explosion-proof grade of the device. The touch screen 14 is fixed by the multiple superposition and pressing of the transparent part 15 and the glass pressing plate 17. The touch screen 14 is installed on the box body 3, the touch screen 14 is installed stably, and each component is pressed and installed without gaps, with good structural sealing performance, high explosion-proof performance of the box body 3, and convenient use.

[0028] As Figures 1-4As shown in the figure, the solenoid valve assembly includes an electromagnetic coil 4, a moving iron core 41, a fixed iron core 42, and a copper sleeve 6. The fixed iron core 42 and the moving iron core 41 are installed to move up and down, assembled inside the electromagnetic coil 4. The lower end of the fixed iron core 42 is threadedly connected to the box body 1, and the connecting thread is an explosion-proof thread with an effective engagement of ≥6 threads. A sealing gasket 5 is provided at the connection. The lower end of the moving iron core 41 is located at the top of the copper sleeve 6. The side of the copper sleeve 6 is the air source inlet 25 provided on the side wall of the box body 3, and below the copper sleeve 6 is the air source outlet 26 on the side wall of the box body 3. The solenoid valve assembly is arranged inside the box body, eliminating the need to install an explosion-proof box outside the box body 3, saving costs, and the overall structure of the device is small in size.

[0029] As Figures 5-7 shown in the figure, a differential pressure joint assembly 7 is connected to the outer wall of the box body 3. A grounding mark 21 is fixed beside the mounting base plate 23 of the box body 3 by a cross-recessed hexagon head screw 11, and a spring washer 10 is provided between the cross-recessed hexagon head screw 11 and the grounding mark 21. A throttle valve assembly 12 and an explosion-proof stuffing box 13 are connected to the side wall of the box body 3. The device adopts intrinsically safe explosion protection, reducing the installation of pressure measuring components inside the device. It is both safe and solves the problem of difficult control of the density of sintered sheets in the original device. The sintered sheets are cancelled, and the volume of the box body is not restricted. Each component originally installed outside the box can be integrated inside the box body 3. The device has a simple structure, avoids the cumbersome process of introducing wires into the device, has reliable performance, and the box body 3 has high explosion-proof performance.

[0030] When the device is in use, through the touch operation on the touch screen 14, the circuit board assembly inside the device is controlled to operate the device. The device controls the opening and closing of the air source inlet 25 and the air source outlet 26 on the box body 3 through the movement of the internal solenoid valve assembly to operate the device. The structure of the device is non-porous and explosion-proof, with high explosion-proof performance. The differential pressure component is moved outside the box body, and intrinsically safe explosion protection is adopted. The volume of the box body can be enlarged. The air circuit system, one-way throttle valve, and explosion-proof solenoid valve of the device are integrated inside, eliminating the need to install an explosion-proof box outside again. The overall structure of the device is concentrated and small in size.

[0031] The embodiments described above are only used to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those skilled in the art to the technical solutions of the present invention should be included in the protection scope determined by the claims of the present invention.

Claims

1. Positive pressure explosion-proof controller, including box body, box cover, contactor, touch screen assembly, solenoid valve assembly, throttle valve assembly, explosion-proof stuffing box, characterized in that: The central inner wall at the bottom of the box body is provided with a mounting base plate, a contactor is fixed on the mounting base plate, a touch screen assembly is installed on the side wall on one side of the box body, and a solenoid valve assembly is installed on the other side of the box body. The touch screen assembly includes a touch screen, a transparent part, a rubber gasket, and a glass pressure plate. The box body is connected and fixed with a box cover by screws and spring washers, and an O-ring is provided between the box body and the box cover.

2. The positive pressure explosion-proof controller according to claim 1, characterized in that: The touch screen is attached to the touch screen window on the side of the box body, located in the installation inner frame in the box body, and is pressed and arranged by the transparent member in the installation inner frame, and the edge of the transparent member and the installation inner frame form a bonding joint surface.

3. The positive pressure explosion-proof controller according to claim 2, characterized in that: A glass pressing plate is fixed on the outer edge of the inner installation frame by bolts, a rubber gasket is arranged between the inner circle of the glass pressing plate and the edge of the transparent part, and a circuit board is arranged beside the inner installation frame in the box body.

4. The positive pressure explosion-proof controller according to claim 1, characterized in that: The solenoid valve assembly includes an electromagnetic coil, a moving iron core, a fixed iron core, and a copper sleeve. The fixed iron core and the moving iron core are movably installed up and down and assembled in the electromagnetic coil. The lower end of the fixed iron core is threadedly connected to the box body, and a sealing gasket is provided at the connection. The lower end of the moving iron core is arranged on the top of the copper sleeve.

5. The positive pressure explosion-proof controller according to claim 4 is characterized in that: The side of the copper sleeve is an air source inlet arranged on the side wall of the box body, and the lower part of the copper sleeve is an air source outlet on the side wall of the box body.

6. The positive pressure explosion-proof controller according to claim 1, characterized in that: The outer wall of the box body is connected with a differential pressure joint assembly, and the box cover is provided with a product nameplate.

7. The positive pressure explosion-proof controller according to claim 1, characterized in that: The box body is fixed with a grounding mark beside the mounting base plate by a cross-recessed cylindrical head screw, and a spring washer is arranged between the cross-recessed cylindrical head screw and the grounding mark.

8. The positive pressure explosion-proof controller according to claim 1, characterized in that: The side wall of the box body is connected with a throttle valve assembly and an explosion-proof stuffing box.

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