Explosion-proof device for thermal instrument in power plant

Abstract

The utility model relates to an explosion-proof device for thermal instruments in a power plant and belongs to the technical field of thermal instruments. Comprising an operation box, a thermal instrument is placed in an inner cavity of the operation box, one side face of the operation box is open, two half doors including the first half door and the second half door are movably arranged on the open side of the operation box, an opening and closing driving mechanism is arranged on the operation box, and the opening and closing driving mechanism drives the two half doors to be close to each other to close the operation box. Or the two half doors are driven to be away from each other to open the operation box; the half doors are respectively provided with a visible window, and the visible windows are used for observing the internal condition of the operation box. And a scraping mechanism is arranged in the operation box and is used for removing stains on the surface of the visible window. Operation is convenient, the two half doors are automatically opened and closed, time and labor are saved, and working efficiency and safety are improved.

Description

Technical Field

[0001] This utility model relates to an explosion-proof device for thermal instruments in power plants, belonging to the field of thermal instrument technology. Background Technology

[0002] In the power industry, especially in power plants, the safe use of thermal instruments is crucial. Because power plants contain large quantities of flammable and explosive materials, these materials must be isolated from thermal instruments, typically using explosion-proof devices. However, traditional explosion-proof devices for thermal instruments have the following drawbacks: the doors require manual opening and closing, which not only increases the workload of workers but is also extremely difficult and even dangerous in certain situations, such as in high-risk or hard-to-access environments. Therefore, there is an urgent need for an explosion-proof device that can open and close automatically. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an explosion-proof device for thermal instruments in power plants, which is easy to operate, with two half doors that open and close automatically, saving time and effort, and improving work efficiency and safety.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: an explosion-proof device for thermal instruments in power plants, including an operating box, in which thermal instruments are placed. One side of the operating box is open, and the open side of the operating box is movably provided with two half-doors: a first half-door and a second half-door. The operating box is provided with an opening and closing drive mechanism, which drives the two half-doors to move closer together to close the operating box, or drives the two half-doors to move away from each other to open the operating box. Each half-door is provided with a viewing window, which is used to observe the internal situation of the operating box. The operating box is provided with a scraping mechanism, which removes stains from the surface of the viewing window.

[0005] The opening and closing drive mechanism includes a first rack and a second rack arranged in parallel. The first rack is fixed to the top of the first half-door, and the second rack is fixed to the top of the second half-door. A driving gear and a driven gear are provided between the first rack and the second rack. The driven gear is arranged parallel to the side of the driving gear and meshes with the driving gear. A first gear unit is provided above the driving gear, and the first gear unit meshes with both the first rack and the driving gear. A second gear unit is provided above the driven gear, and the second gear unit meshes with both the driven gear and the second rack. Driving the driving gear to rotate causes the driven gear to rotate in the opposite direction. The rotation of the driving gear drives the first gear unit to rotate, which in turn moves the first rack. The reverse rotation of the driven gear drives the second gear unit to rotate in the opposite direction, which in turn moves the second rack in the opposite direction, thus realizing the reverse movement of the first half-door and the second half-door.

[0006] The top of the control box is provided with a support block, and the inner wall of the top of the support block is provided with a motor mounting bracket, a first mounting bracket and a second mounting bracket. The motor is mounted on the motor mounting bracket, and the driving gear is fixed on the output shaft of the motor. The first mounting bracket is provided with a first gear unit, the second mounting bracket is provided with a second gear unit, and the central shaft of the driven gear is located on the second mounting bracket.

[0007] The first mounting frame includes two parallel first vertical rods, with a first connecting rod between the two first vertical rods; the first gear unit includes a parallel first gear and a first gear', the first gear being positioned above the driving gear and meshing with the driving gear; the first gear' being positioned above the first rack and meshing with the first rack; the second mounting frame includes two parallel second vertical rods, with a second connecting rod between the two second vertical rods; the second gear unit includes a parallel second gear and a second gear'; the second gear being positioned above the driven gear and meshing with the driven gear; the second gear' being positioned above the second rack and meshing with the second rack.

[0008] The scraping mechanism includes two scraping units, each corresponding to a viewing window; each scraping unit includes a scraper, and a horizontally arranged cylinder is provided on the inner wall of the operation box, with the scraper fixed to the cylinder extension rod.

[0009] The bottom and top of the opening side of the control box are respectively provided with a continuous sliding groove. The bottom inner wall, top inner wall of the first half door and the bottom inner wall and top inner wall of the second half door are respectively provided with sliders, and the sliders are located in the corresponding through grooves.

[0010] A sealing block is provided on the side of the first half door, and a sealing groove is provided on the side of the second half door. The sealing block and the sealing groove are arranged opposite to each other. When the first half door and the second half door are closed, the sealing block is located in the sealing groove.

[0011] Compared with existing technologies, the advantages of this utility model are as follows: An explosion-proof device for power plant thermal instruments, featuring a motor-controlled opening and closing drive mechanism, enables the automatic opening and closing of the two half-doors. In dangerous situations, this avoids accidents caused by manual opening by personnel, thus improving work efficiency and safety. By using a single motor in conjunction with the opening and closing drive mechanism to complete the opening and closing of both half-doors, production costs are saved. When the viewing window is obstructed, personnel can use a scraping mechanism to clean the window, ensuring clear observation of the inside of the control box and enabling correct instructions to be given. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of an explosion-proof device for thermal instruments in a power plant, according to an embodiment of the present invention.

[0013] Figure 2 This is a partial three-dimensional schematic diagram of an explosion-proof device for thermal instruments in a power plant, according to an embodiment of this utility model.

[0014] Figure 3 This is a three-dimensional schematic diagram of the opening and closing drive mechanism;

[0015] Figure 4 A three-dimensional schematic diagram of the control box and the scraping mechanism;

[0016] Figure 5 This is a diagram showing the two half-doors in the closed state.

[0017] Figure 6 This is a 3D schematic diagram of a half-door;

[0018] In the diagram: 1. Control box; 2. Viewing window; 3. Support block; 4. Second half door; 5. First half door; 6. First rack; 7. Second rack; 8. Motor; 9. Sealing block; 10. First vertical rod; 11. Motor mounting bracket; 12. Second vertical rod; 13. Driving gear; 14. Driven gear; 15. First gear; 16. First gear'; 17. Second gear; 18. Second gear'; 19. First connecting rod; 20. Second connecting rod; 21. Slide groove; 22. Scraper; 23. Cylinder; 24. Slider. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown in this embodiment, an explosion-proof device for thermal instruments in a power plant includes an operation box 1, with thermal instruments housed inside. One side of the operation box 1 is open, and the open side has two movable half-doors: a first half-door 5 and a second half-door 4. The operation box 1 is equipped with an opening and closing drive mechanism. This mechanism drives the two half-doors closer together to close the opening side of the operation box, achieving a seal; or it drives the two half-doors further apart to open the opening side of the operation box, facilitating the removal and placement of the thermal instruments. The first and second half-doors are each equipped with a viewing window 2 for observing the interior of the operation box. The operation box 1 contains two scraping units, corresponding to the viewing windows. When a thermal instrument catches fire inside the operation box, the operator activates the fire suppression system inside the operation box via a controller. The fire suppression system sprays dry ice to extinguish the fire. At this time, the sprayed dry ice will obscure the viewing windows. The scraping units remove the dry ice from the surface of the viewing windows, allowing the operator to clearly see the interior of the operation box.

[0021] The aforementioned control box, half-door, etc., are all made of explosion-proof materials.

[0022] like Figure 2, 3 As shown, the opening and closing drive mechanism includes a first rack 6 and a second rack 7. The first rack 6 is fixed to the top of the first half-door 5, and the second rack 7 is fixed to the top of the second half-door 4. An L-shaped support block 3 lying on its side is provided on the top of the control box 1. A motor mounting bracket 11, a first mounting bracket, and a second mounting bracket are provided on the inner wall of the top of the support block. A motor 8 is mounted on the motor mounting bracket 11, and a drive gear 13 is mounted on the output shaft of the motor 8. A driven gear 14 is provided on the side of the drive gear 13. The central shafts of the drive gear and the driven gear are arranged parallel to each other, and the drive gear meshes with the driven gear. A first gear unit is mounted inside the first mounting bracket, and the first gear unit meshes with both the first rack 6 and the drive gear 13. A second gear unit is mounted inside the second mounting bracket, and the second gear unit meshes with both the driven gear 14 and the second rack 7. When the motor rotates, it drives the drive gear to rotate and the driven gear to rotate in the opposite direction. The rotation of the drive gear drives the first gear unit to rotate, which in turn moves the first rack; the rotation of the driven gear drives the second gear unit to rotate, which in turn moves the second rack. Since the driving gear and the driven gear rotate in opposite directions, the first gear unit and the second gear unit rotate in opposite directions, realizing that the first rack and the second rack move in opposite directions. This causes the first half door and the second half door to move towards each other to close the control box, and to move in opposite directions to open the control box.

[0023] The aforementioned first mounting frame includes two parallel first vertical rods 10, one end of which is fixed to the inner wall of the top of the support block. A first connecting rod 19 is erected between the two first vertical rods, and both ends of the first connecting rod 19 are fixed to the first vertical rods 10 by bearings, allowing the first connecting rod to rotate between the first vertical rods. The first gear unit includes a parallel first gear 15 and a first gear '16, which are mounted on the first connecting rod 19, meaning that the first connecting rod, the first gear, and the first gear ' rotate in the same direction. The first gear is positioned above the driving gear and meshes with the driving gear, while the first gear ' is positioned above the first rack and meshes with the first rack.

[0024] The aforementioned second mounting bracket includes two parallel second vertical rods 12, one end of which is fixed to the top of the support block. A second connecting rod 20 is installed between the two second vertical rods, and both ends of the second connecting rod 20 are fixed to the second vertical rods by bearings, allowing the second connecting rod to rotate between the two vertical rods. The second gear unit includes a parallel second gear 17 and a second gear '18, which are mounted on the second connecting rod 20, meaning that the second connecting rod, the second gear, and the second gear ' rotate in the same direction. The second gear is located above the driven gear and meshes with it; the second gear ' is located above the second rack and meshes with it. The central shaft of the driven gear is fixed to a second vertical rod by bearings.

[0025] Since the driving gear and the driven gear rotate in opposite directions, the first gear and the second gear that mesh with the driving gear and the driven gear rotate in opposite directions, that is, the first gear unit and the second gear unit rotate in opposite directions.

[0026] The aforementioned driving gear and driven gear are positioned between the first rack and the second rack, with the first gear unit and the second gear unit being offset from each other. The meshing between the first gear and the driving gear, the driving gear and the driven gear, and the driven gear and the second gear does not interfere with each other, ensuring the stability of the gear transmission.

[0027] like Figure 4 As shown, each scraping unit includes a scraper 22, which corresponds to the viewing window 2. A horizontally arranged cylinder 23 is provided on the inner wall of the control box, and the scraper 22 is fixed to the extension rod of the cylinder 23. The cylinder drives the scraper to move horizontally, so that the scraper can reciprocate along the length of the viewing window, thereby removing stains from the surface of the viewing window.

[0028] The height of the scraper is greater than the height of the viewing window, and the inner wall of the viewing window is flush with the inner wall of the half-door, so that the scraper can be moved along the length of the viewing window to remove stains.

[0029] like Figure 5 , 6 As shown, both the first and second half doors are inverted L-shaped structures. A continuous sliding groove 21 is formed at the bottom and top of the opening side of the control box. Sliding blocks 24 are respectively installed on the inner walls of the bottom and top of the first half door, and the inner walls of the bottom and top of the second half door. These sliding blocks are positioned within their corresponding grooves, serving to guide the opening and closing of the first and second half doors and ensuring the airtightness of the control box's interior. A sealing block 9 is provided on the side of the first half door, and a sealing groove is formed on the side of the second half door, with the sealing block and sealing groove arranged opposite each other. When the first and second half doors are closed, the sealing block is positioned within the sealing groove, again ensuring the airtightness of the control box's interior.

[0030] The controller operates the motor, enabling the opening and closing drive mechanism to automatically open and close the two half-doors. In dangerous situations, this prevents workers from manually opening the doors and causing accidents, thus improving work efficiency and safety. By using a single motor in conjunction with the opening and closing drive mechanism to complete the opening and closing of both half-doors, production costs are saved. When the viewing window is obstructed, workers can use a scraping mechanism to clean away dirt, ensuring a clear view of the control panel's interior and allowing for correct instruction.

[0031] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. Explosion-proof device for thermal instruments in power plants, characterized in that: The device includes an operating box, the interior of which houses thermal instruments. One side of the operating box is open, and the open side has two movable half-doors: a first half-door and a second half-door. The operating box is equipped with an opening and closing drive mechanism, which drives the two half-doors to move closer together to close the operating box, or drives the two half-doors to move away from each other to open the operating box. Each half-door has a viewing window for observing the interior of the operating box. The operating box also has a scraping mechanism for removing dirt from the surface of the viewing windows.

2. The explosion-proof device for power plant thermal instruments according to claim 1, characterized in that: The opening and closing drive mechanism includes a first rack and a second rack arranged in parallel. The first rack is fixed to the top of the first half-door, and the second rack is fixed to the top of the second half-door. A driving gear and a driven gear are provided between the first rack and the second rack. The driven gear is arranged parallel to the side of the driving gear and meshes with the driving gear. A first gear unit is provided above the driving gear, and the first gear unit meshes with both the first rack and the driving gear. A second gear unit is provided above the driven gear, and the second gear unit meshes with both the driven gear and the second rack. Driving the driving gear to rotate causes the driven gear to rotate in the opposite direction. The rotation of the driving gear drives the first gear unit to rotate, which in turn moves the first rack. The reverse rotation of the driven gear drives the second gear unit to rotate in the opposite direction, which in turn moves the second rack in the opposite direction, thus realizing the reverse movement of the first half-door and the second half-door.

3. The explosion-proof device for power plant thermal instruments according to claim 2, characterized in that: The top of the control box is provided with a support block, and the inner wall of the top of the support block is provided with a motor mounting bracket, a first mounting bracket and a second mounting bracket. The motor is mounted on the motor mounting bracket, and the driving gear is fixed on the output shaft of the motor. The first mounting bracket is provided with a first gear unit, the second mounting bracket is provided with a second gear unit, and the central shaft of the driven gear is located on the second mounting bracket.

4. The explosion-proof device for power plant thermal instruments according to claim 3, characterized in that: The first mounting frame includes two parallel first vertical rods, with a first connecting rod between the two first vertical rods; the first gear unit includes a parallel first gear and a first gear', the first gear being positioned above the driving gear and meshing with the driving gear; the first gear' being positioned above the first rack and meshing with the first rack; the second mounting frame includes two parallel second vertical rods, with a second connecting rod between the two second vertical rods; the second gear unit includes a parallel second gear and a second gear'; the second gear being positioned above the driven gear and meshing with the driven gear; the second gear' being positioned above the second rack and meshing with the second rack.

5. The explosion-proof device for power plant thermal instruments according to claim 1, characterized in that: The scraping mechanism includes two scraping units, each corresponding to a viewing window; each scraping unit includes a scraper, and a horizontally arranged cylinder is provided on the inner wall of the operation box, with the scraper fixed to the cylinder extension rod.

6. The explosion-proof device for power plant thermal instruments according to claim 1, characterized in that: The bottom and top of the opening side of the control box are respectively provided with a continuous sliding groove. The bottom inner wall, top inner wall of the first half door and the bottom inner wall and top inner wall of the second half door are respectively provided with sliders, and the sliders are located in the corresponding through grooves.

7. The explosion-proof device for power plant thermal instruments according to claim 1, characterized in that: A sealing block is provided on the side of the first half door, and a sealing groove is provided on the side of the second half door. The sealing block and the sealing groove are arranged opposite to each other. When the first half door and the second half door are closed, the sealing block is located in the sealing groove.

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