Explosion-proof safety control instrument

Abstract

The utility model relates to the technical field of safety control instrument, and disclose an explosion -proof safety control instrument, including explosion -proof shell and control panel, the front end surface of explosion -proof shell is seted up to have installed groove, through setting movable frame and piston rod etc.

Description

Technical Field

[0001] This utility model relates to the field of safety control instrument technology, and in particular to an explosion-proof and fire-resistant safety control instrument. Background Technology

[0002] In industrial sectors such as petrochemicals and coal mining, where flammable and explosive gases or dust are present, explosion-proof safety controllers are core equipment for ensuring production safety. Existing explosion-proof safety controllers monitor parameters such as the concentration, temperature, and pressure of combustible gases in the environment in real time. When the monitored values ​​reach a dangerous threshold, they promptly issue an alarm and control the operation of relevant equipment, thereby preventing explosions and combustion accidents. To ensure the safe and reliable operation of the instrument in hazardous environments and to prevent internal electrical sparks, high temperatures, and other dangerous factors from igniting external flammable and explosive substances, while also preventing external hazardous media from entering the instrument, the outer casing of the explosion-proof safety controller typically uses sealing rings to protect the internal equipment.

[0003] In actual use, it has been found that with the increase of usage time, the sealing ring will age and harden under the long-term effects of high temperature, ultraviolet rays, oxygen and corrosive media. This leads to increased material hardness and loss of elasticity, resulting in a tight fit with the sealing groove wall and a wedging effect. It is very easy to break or leave fragments during disassembly, which is difficult to clean and affects the explosion-proof performance and service life of the instrument. Utility Model Content

[0004] In response to the aging and hardening of sealing rings under long-term exposure to high temperatures, ultraviolet radiation, oxygen, and corrosive media, resulting in increased material hardness, loss of elasticity, and tight adhesion to the sealing groove wall, creating a wedging effect, the sealing rings are prone to breakage or leave behind fragments during disassembly, which are difficult to clean and affect the explosion-proof performance and service life of the instrument, this utility model provides an explosion-proof fire safety controller that has the advantage of stable removal of sealing rings, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: an explosion-proof fire safety controller, including an explosion-proof housing and a control panel. The front surface of the explosion-proof housing has a mounting groove, and a sealing ring is embedded in the inner side of the mounting groove. The interior of the explosion-proof housing has a slide rail, and a movable frame is slidably connected inside the slide rail. The movable frame is slidably connected to the interior of the slide rail. Multiple piston rods are fixedly mounted on the front surface of the movable frame, and a rubber piston is fixedly mounted on the other end of each piston rod. Multiple sealing cavities are formed on the inner wall of the slide rail. The piston rods are located inside the sealing cavities, and the sides of the rubber pistons are tightly fitted against the inner wall of the sealing cavities. Air holes are formed on the side of each sealing cavity away from the movable frame, and the other side of the air holes communicates with the interior of the mounting groove.

[0006] Preferably, the explosion-proof housing has a connecting groove in the middle of both sides, and the inner side of the connecting groove is connected to the middle of the slide rail. The movable frame has a fixing plate fixedly installed on both sides, and the fixing plate is slidably connected to the inside of the connecting groove.

[0007] By setting up the connecting slot, a sliding guide path is provided for the fixed plate, enabling the movable frame to move stably within the explosion-proof enclosure.

[0008] Preferably, a drive rod is fixedly installed in the middle of each of the fixed plates, and a rectangular block is fixedly installed at the other end of the drive rod. A sliding groove is formed through the surface of the rectangular block.

[0009] By setting up a drive rod, the fixed plate and the rectangular block are connected, and the driving power is transmitted to realize the sliding drive of the movable frame.

[0010] Preferably, a fixing seat is fixedly installed at both ends of the explosion-proof shell, a limiting plate and a guide plate are fixedly installed at both ends of the fixing seat, a compression spring is sleeved on the outside of the drive rod, the two ends of the compression spring are fixedly installed on the corresponding surfaces of the guide plate and the rectangular block, the surface of the drive rod is slidably installed inside the guide plate, and a connecting piece is fixedly installed at the upper end of the limiting plate.

[0011] By using a compression spring, elastic potential energy is stored when the drive rod moves, and when released, it pushes the movable frame to reset.

[0012] Preferably, a V-shaped plate is rotatably mounted on the bottom of the connecting piece, and a T-shaped rod is fixedly mounted on the bottom of one end of the V-shaped plate away from the connecting piece. The T-shaped rod is slidably connected to the inside of the groove, and a pull rod is fixedly mounted at the included angle of the V-shaped plate.

[0013] By setting up the V-shaped plate, the pulling force of the pull rod is converted into a component force that pushes the rectangular block to move, thus realizing the sliding drive of the drive rod.

[0014] Preferably, the left side of the control panel is hinged to the front end of the explosion-proof housing, and the right side of the explosion-proof housing and the control panel are provided with locking devices.

[0015] Preferably, the locking device includes a connecting plate and a mounting base. The connecting plate is fixedly installed on the side of the control panel, and two U-shaped grooves are formed through the surface of the connecting plate. The mounting base is fixedly installed on one side of the explosion-proof housing and corresponds to the position of the connecting plate.

[0016] The U-shaped groove provides sliding adjustment space for the movable rod, facilitating the locking and unlocking of the control panel in conjunction with the movable rod.

[0017] Preferably, the surface of the mounting base has two grooves, and a movable rod is hinged to the inside of each groove. The diameter of the movable rod is adapted to the U-shaped groove, and one end of the movable rod is threaded. A limit nut is installed on the inner thread of the movable rod away from the groove.

[0018] This utility model has the following advantages:

[0019] 1. By setting up a movable frame and piston rod, when the sealing ring needs to be removed, external force drives the movable frame to slide in the slide rail. The movable frame drives the piston rod and rubber piston to move in the sealing cavity. The rubber piston squeezes the gas in the sealing cavity, and the gas rushes into the installation groove through the air hole, generating a uniform thrust on the sealing ring, causing the sealing ring to detach from the installation groove. This avoids the damage to the sealing ring and installation groove caused by traditional manual disassembly, and realizes convenient and stable removal of the sealing ring. Utilizing the principle of air pressure drive, when disassembly is not required, the rubber piston creates a negative pressure environment in the sealing cavity, generating an adsorption force on the sealing ring in the installation groove through the air hole, so that the sealing ring fits tightly against the inner wall of the installation groove, enhancing the sealing performance after the sealing ring is installed.

[0020] 2. By setting up structures such as pull rods and V-shaped plates, when the pull rod is pulled, the V-shaped plate rotates around the connecting piece, and the T-shaped rod at one end of the V-shaped plate slides in the slide groove, driving the rectangular block, drive rod, and fixed plate to move. This causes the movable frame to slide in the slide rail, and the compression spring is compressed to store elastic potential energy. At the same time, the movable frame drives the piston rod to move towards the side of the sealing ring. When the pull rod is released, the compression spring releases elastic potential energy, pushing the rectangular block, drive rod, and movable frame to reset. The pulling force of the pull rod is converted into the sliding power of the movable frame, making the quick-release operation more labor-saving and convenient, improving the practicality and reliability of the device, and ensuring the stable realization of the quick-release function.

[0021] 3. By setting a locking device, align the U-shaped groove on the connecting plate with the movable rod on the mounting base, rotate the movable rod to pass through the U-shaped groove, and then tighten the limit nut to fix the movable rod on the connecting plate, thereby locking the explosion-proof shell and the control panel. This locking device has a simple structure and is easy to operate. Through the cooperation between the movable rod and the U-shaped groove and the fixation of the limit nut, the control panel is tightly connected to the explosion-proof shell, ensuring the sealing and explosion-proof performance of the instrument shell. At the same time, it facilitates the installation and disassembly of the control panel, meeting the needs of instrument maintenance and use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall main view structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the locking device structure of this utility model;

[0024] Figure 3This is a schematic diagram of the inner front end structure of the explosion-proof shell of this utility model;

[0025] Figure 4 This is a schematic diagram of the upper cross-sectional structure of the explosion-proof shell of this utility model;

[0026] Figure 5 This is a schematic diagram of the side structure of the explosion-proof shell of this utility model;

[0027] Figure 6 This is a schematic diagram of the internal structure of the explosion-proof shell of this utility model.

[0028] In the diagram: 1. Explosion-proof housing; 2. Control panel; 3. Locking device; 301. Connecting plate; 302. U-shaped groove; 303. Mounting base; 304. Groove; 305. Movable rod; 306. Limit nut; 41. Mounting groove; 42. Sealing ring; 501. Slide rail; 502. Movable frame; 503. Sealing cavity; 504. Air hole; 505. Piston rod; 506. Rubber piston; 507. Connecting groove; 508. Fixing plate; 509. Drive rod; 510. Rectangular block; 511. Slide groove; 601. Fixing base; 602. Limiting plate; 603. Connecting piece; 604. V-shaped plate; 605. Pull rod; 606. T-shaped rod; 607. Guide plate; 608. Compression spring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-3 The explosion-proof fire safety controller includes an explosion-proof housing 1 and a control panel 2. The explosion-proof housing 1 is equipped with electrical components, and the control panel 2 is equipped with buttons and a display screen. This structure is a mature existing technology, so it will not be described in detail later. The explosion-proof housing 1 is made of high-strength aluminum alloy, which can play a role in explosion-proof fire safety protection. The front surface of the explosion-proof housing 1 is provided with a mounting groove 41, and a sealing ring 42 is inlaid and installed inside the mounting groove 41.

[0031] The explosion-proof housing 1 has a slide rail 501 inside, and a movable frame 502 is slidably connected inside the slide rail 501. Multiple piston rods 505 are fixedly installed on the front surface of the movable frame 502, and rubber pistons 506 are fixedly installed on the other end of each piston rod 505. Using the principle of air pressure drive, when there is no need to remove it, the rubber pistons 506 form a negative pressure environment in the sealing cavity 503. Through the air hole 504, they generate an adsorption force on the sealing ring 42 in the mounting groove 41, so that the sealing ring 42 is tightly attached to the inner wall of the mounting groove 41, thereby enhancing the sealing performance of the sealing ring 42 after installation.

[0032] Please see Figures 2-4 The inner wall of the slide rail 501 has multiple sealing cavities 503. The piston rod 505 is located inside the sealing cavity 503, and the side of the rubber piston 506 is tightly fitted with the inner wall of the sealing cavity 503. The side of the multiple sealing cavities 503 away from the movable frame 502 has an air hole 504, and the other side of the air hole 504 is connected to the inside of the mounting groove 41. When it is necessary to remove the sealing ring 42, the external force drives the movable frame 502 to slide in the slide rail 501. The movable frame 502 drives the piston rod 505 and the rubber piston 506 to move in the sealing cavity 503. The rubber piston 506 squeezes the gas in the sealing cavity 503. The gas rushes into the mounting groove 41 through the air hole 504, generating a uniform thrust on the sealing ring 42, causing the sealing ring 42 to detach from the mounting groove 41. This avoids the damage to the sealing ring 42 and the mounting groove 41 caused by traditional manual disassembly, and realizes the convenient and stable removal of the sealing ring 42.

[0033] Please see Figures 4-6 The explosion-proof housing 1 has a connecting groove 507 in the middle of both sides, and the inner side of the connecting groove 507 is connected to the middle of the slide rail 501. The movable frame 502 has a fixed plate 508 fixedly installed on both sides, and the fixed plate 508 is slidably connected to the inside of the connecting groove 507 to provide guidance for the movable frame 502, so that it can move smoothly in the slide rail 501, prevent deviation or jamming, and ensure the stable operation of the device. The fixed plate 508 has a drive rod 509 fixedly installed in the middle, and a rectangular block 510 is fixedly installed at the other end of the drive rod 509. The surface of the rectangular block 510 has a through groove 511.

[0034] Please see Figures 5-6Both ends of the explosion-proof housing 1 are fixedly installed with mounting bases 601. Limit plates 602 and guide plates 607 are fixedly installed at both ends of the mounting bases 601, respectively. A compression spring 608 is sleeved on the outer side of the drive rod 509. The two ends of the compression spring 608 are fixedly installed on the guide plate 607 and the corresponding surfaces of the rectangular block 510, respectively. When the V-shaped plate 604 is pulled by the pull rod 605, the compression spring 608 is compressed and stores elastic potential energy. Simultaneously, the movable frame 502 drives the piston rod 505 to move towards one side of the sealing ring 42. When the pull rod 605 is released... The compression spring 608 releases elastic potential energy, pushing the rectangular block 510, drive rod 509 and movable frame 502 to reset, converting the pulling force of the pull rod 605 into the sliding force of the movable frame 502, making the quick release operation more labor-saving and convenient, improving the practicality and reliability of the device, and ensuring the stable realization of the quick release function. The surface of the drive rod 509 is slidably installed inside the guide plate 607, providing precise guidance for the movement of the drive rod 509, ensuring that it slides smoothly in a fixed direction, thereby ensuring the stability of the movable frame 502 moving within the slide rail 501.

[0035] Please see Figure 5 A connecting piece 603 is fixedly installed on the upper end of the limiting plate 602. A V-shaped plate 604 is rotatably installed on the bottom of the connecting piece 603. A T-shaped rod 606 is fixedly installed on the bottom of one end of the V-shaped plate 604 away from the connecting piece 603. The T-shaped rod 606 is slidably connected to the inside of the slide groove 511. A pull rod 605 and a V-shaped plate 604 are provided. When the pull rod 605 is pulled, the V-shaped plate 604 rotates around the connecting piece 603. The T-shaped rod 606 at one end of the V-shaped plate 604 slides in the slide groove 511, driving the rectangular block 510, the drive rod 509 and the fixed plate 508 to move, thereby causing the movable frame 502 to slide in the slide rail 501. A pull rod 605 is fixedly installed at the included angle of the V-shaped plate 604. The left side of the control panel 2 is hinged to the front end of the explosion-proof shell 1.

[0036] Please see Figure 2A locking device 3 is provided on the right side of the explosion-proof housing 1 and the control panel 2. The locking device 3 includes a connecting plate 301 and a mounting base 303. The connecting plate 301 is fixedly installed on the side of the control panel 2. Two U-shaped grooves 302 are formed through the surface of the connecting plate 301. The mounting base 303 is fixedly installed on one side of the explosion-proof housing 1 and corresponds to the position of the connecting plate 301. Two grooves 304 are formed on the surface of the mounting base 303. A movable rod 305 is hingedly installed inside each of the two grooves 304. The U-shaped grooves 302 on the connecting plate 301 are aligned with the movable rods 305 on the mounting base 303, and the movable rods 305 are rotated to pass through the U-shaped grooves 302. Then, tighten the limiting nut 306 to fix the movable rod 305 on the connecting plate 301, thereby locking the explosion-proof housing 1 and the control panel 2. The locking device 3 has a simple structure and is easy to operate. The diameter of the movable rod 305 is adapted to the U-shaped groove 302 and one of its outer ends is threaded. The limiting nut 306 is installed on the inner thread of the movable rod 305 away from the groove 304. Through the cooperation between the movable rod 305 and the U-shaped groove 302 and the fixing of the limiting nut 306, the control panel 2 is tightly connected to the explosion-proof housing 1, ensuring the sealing and explosion-proof performance of the instrument housing. At the same time, it is convenient to install and disassemble the control panel 2, meeting the needs of instrument maintenance and use.

[0037] Working principle: In practical application, when it is necessary to disassemble the sealing ring 42, the external force applied to the pull rod 605 drives the V-shaped plate 604 to rotate around the connecting piece 603. The T-shaped rod 606 at one end of the V-shaped plate 604 slides in the slide groove 511 of the rectangular block 510, thereby pushing the rectangular block 510, the drive rod 509 and the fixed plate 508 to move, so that the movable frame 502 slides forward in the slide rail 501.

[0038] The piston rod 505 at the front end of the movable frame 502 drives the rubber piston 506 to move synchronously in the sealing cavity 503. The rubber piston 506 squeezes the gas in the sealing cavity 503, causing it to rush into the mounting groove 41 through the air hole 504, generating a uniform thrust on the sealing ring 42, causing the sealing ring 42 to detach from the mounting groove 41, completing the disassembly operation. Then, a new sealing ring 42 is placed into the mounting groove 41.

[0039] When the lever 605 is released, the compression spring 608 releases its elastic potential energy, pushing the rectangular block 510, the drive rod 509 and the movable frame 502 to reset. At this time, the rubber piston 506 forms a negative pressure environment in the sealing cavity 503, and through the air hole 504, it generates an adsorption force on the newly installed sealing ring 42 in the mounting groove 41, so that the sealing ring 42 fits tightly against the inner wall of the mounting groove 41, thereby achieving tight installation of the sealing ring 42 and ensuring the sealing performance of the explosion-proof shell 1.

[0040] When installing the control panel 2, align the U-shaped groove 302 on the connecting plate 301 with the movable rod 305 on the mounting base 303, rotate the movable rod 305 to pass through the U-shaped groove 302, and then tighten the limit nut 306 to fix the movable rod 305 on the connecting plate 301, thereby locking the control panel 2 with the explosion-proof housing 1, ensuring the sealing performance of the instrument housing and meeting the explosion-proof requirements.

Claims

1. An explosion-proof fire safety controller, comprising an explosion-proof housing (1) and a control panel (2), characterized in that: The explosion-proof housing (1) has a mounting groove (41) on its front surface. A sealing ring (42) is inlaid on the inner side of the mounting groove (41). The explosion-proof housing (1) has a slide rail (501) inside. A movable frame (502) is slidably connected inside the slide rail (501). The movable frame (502) is slidably connected to the inside of the slide rail (501). A plurality of piston rods (505) are fixedly installed on the front surface of the movable frame (502). 5) The other end is fixedly installed with a rubber piston (506). The inner wall of the slide rail (501) is provided with multiple sealing cavities (503). The piston rod (505) is located inside the sealing cavity (503) and the side of the rubber piston (506) is tightly fitted with the inner wall of the sealing cavity (503). The multiple sealing cavities (503) are provided with air holes (504) on the side away from the movable frame (502), and the other side of the air holes (504) is connected to the inside of the mounting groove (41).

2. The explosion-proof fire safety controller according to claim 1, characterized in that: The explosion-proof housing (1) has a connecting groove (507) in the middle of both sides, and the inner side of the connecting groove (507) is connected to the middle of the slide rail (501). The movable frame (502) has a fixing plate (508) fixedly installed on both sides, and the fixing plate (508) is slidably connected to the inside of the connecting groove (507).

3. The explosion-proof fire safety controller according to claim 2, characterized in that: A drive rod (509) is fixedly installed in the middle of each fixed plate (508), and a rectangular block (510) is fixedly installed at the other end of the drive rod (509). A sliding groove (511) is opened through the surface of the rectangular block (510).

4. The explosion-proof fire safety controller according to claim 3, characterized in that: The explosion-proof housing (1) is fixedly mounted with a fixing seat (601) at both ends. The fixing seat (601) is fixedly mounted with a limiting plate (602) and a guide plate (607) at both ends. The drive rod (509) is sleeved with a compression spring (608). The two ends of the compression spring (608) are fixedly mounted on the corresponding surfaces of the guide plate (607) and the rectangular block (510). The surface of the drive rod (509) is slidably mounted inside the guide plate (607). The upper end of the limiting plate (602) is fixedly mounted with a connecting piece (603).

5. The explosion-proof fire safety controller according to claim 4, characterized in that: A V-shaped plate (604) is rotatably mounted on the bottom of the connecting piece (603). A T-shaped rod (606) is fixedly mounted on the bottom of one end of the V-shaped plate (604) away from the connecting piece (603). The T-shaped rod (606) is slidably connected to the inside of the slide groove (511). A pull rod (605) is fixedly mounted at the included angle of the V-shaped plate (604).

6. The explosion-proof fire safety controller according to claim 1, characterized in that: The left side of the control panel (2) is connected to the front end of the explosion-proof housing (1) by a hinge, and the right side of the explosion-proof housing (1) and the control panel (2) are provided with a locking device (3).

7. The explosion-proof fire safety controller according to claim 6, characterized in that: The locking device (3) includes a connecting plate (301) and a mounting base (303). The connecting plate (301) is fixedly installed on the side of the control panel (2). Two U-shaped grooves (302) are formed through the surface of the connecting plate (301). The mounting base (303) is fixedly installed on one side of the explosion-proof housing (1) and corresponds to the position of the connecting plate (301).

8. The explosion-proof fire safety controller according to claim 7, characterized in that: The surface of the mounting base (303) has two grooves (304), and a movable rod (305) is hingedly installed inside each of the two grooves (304). The diameter of the movable rod (305) is adapted to the U-shaped groove (302), and one of its outer ends is threaded. A limit nut (306) is installed on the inner thread of the movable rod (305) away from the groove (304).

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