A downhole split positive and negative interlocking pressure relief valve

Abstract

The utility model relates to the technical field of underground pressure relief, especially to a well down split type positive and negative interlocking pressure relief damper, which comprises a door frame, four clamping barrels fixedly connected to the side wall of the door frame, a rotating rod rotatably connected to the inner side of each clamping barrel, two rotating rods in each group, and a pressure relief damper body fixedly connected to the rotating rods in each group. A locking rotating structure is installed on the door frame, which comprises a fixed block fixedly connected to the side wall of the door frame, a support plate fixedly connected to the side wall of the fixed block, and a control motor fixedly installed on the upper side of the support plate. The locking rotating structure can control the opening and closing of two pressure relief dampers simultaneously when the pressure relief damper body is opened, and the locking structure can lock the pressure relief damper, preventing the pressure relief damper from being suddenly opened due to sudden increase in air pressure.

Description

Technical Field

[0001] This utility model relates to the field of downhole pressure relief technology, and in particular to a downhole double-opening forward and reverse interlocking pressure relief damper. Background Technology

[0002] In modern underground coal mines, pressure-reducing air doors are mainly used in mines with high gas levels or roadways with high ventilation pressure. When the pressure in the roadway rises abnormally, such as when gas suddenly surges or local pressure spikes, the door can safely release excess pressure by opening the door, gradually balancing the pressure difference between the inside and outside of the roadway. During the pressure relief process, ventilation isolation is maintained, protecting the roadway and personnel safety. It is an important facility for the safe operation of underground ventilation systems.

[0003] Currently, existing pressure-reducing dampers cannot open two dampers at the same angle simultaneously during pressure relief, resulting in an inability to control the pressure relief situation. Furthermore, they cannot close automatically under normal circumstances and require manual closing, which is labor-intensive and troublesome. The dampers need to be manually monitored to prevent them from opening when not needed. Utility Model Content

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A downhole double-opening forward and reverse interlocking pressure-reducing air door includes:

[0006] The door frame has four clips fixedly connected to its side wall. Each of the four clips has a rotating rod rotatably connected to its inner side. The four rotating rods are in pairs, and each pair of rotating rods is fixedly connected to the pressure reducing damper body.

[0007] The door frame is equipped with an interlocking rotation structure, which includes a fixed block fixedly connected to the side wall of the door frame. A support plate is fixedly connected to the side wall of the fixed block. A control motor is fixedly installed on the upper side of the support plate. A threaded rod is fixedly installed at the output end of the control motor. A sliding plate is threadedly connected to the outer side of the threaded rod. The sliding plate is slidably connected to the door frame. Two rotating shafts are rotatably connected to the side wall of the door frame. A spur gear is fixedly sleeved on the outer side of each of the two rotating shafts. A spur rack is fixedly connected to both sides of the sliding plate. The two rotating shafts and the two rotating rods are connected by a pulley assembly for transmission.

[0008] Preferably, a locking structure is installed on the fixing block. The locking structure includes a slider that is slidably connected to the inner side of the fixing block, a second spur rack that is fixedly connected to the inner side of the sliding plate, a second threaded rod that is rotatably connected to the inner side of the fixing block, the second threaded rod that is threadedly connected to the slider, a second spur gear that is fixedly sleeved on the outer side of the second threaded rod that meshes with the second spur rack, and two locking rods that are fixedly connected to the lower side of the slider.

[0009] Preferably, two reinforcing fixing rods are fixedly connected between the fixing block and the support plate.

[0010] Preferably, a protective shell is fixedly connected to the upper side of the support plate, and ventilation holes are opened in the side wall of the protective shell.

[0011] Preferably, a door handle is fixedly connected to the side wall of the pressure-reducing damper body.

[0012] Preferably, two pressure sensors are fixedly installed on the side wall of the door frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, the interlocking rotation structure enables the simultaneous control of the opening and closing of two pressure-reducing dampers when the pressure-reducing damper body is opened, and the opening angle of the pressure-reducing damper can also be controlled by the pressure difference, resulting in better pressure relief and eliminating the need for manual control.

[0015] 2. In this utility model, the locking structure can lock the pressure reducing damper, which prevents the pressure reducing damper from being forced open by a sudden increase in air pressure, and also prevents it from opening by itself under normal conditions, thus providing a certain degree of protection for the pressure reducing damper. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a split-type forward and reverse interlocking pressure-reducing air door for underground mining, as proposed in this utility model.

[0017] Figure 2 This is a rear three-dimensional view of a downhole double-opening forward and reverse interlocking pressure-reducing air door proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the interlocking rotation structure of a split-type forward and reverse interlocking pressure-reducing air door for underground applications proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the locking structure of a split-type forward and reverse interlocking pressure-reducing air door proposed in this utility model.

[0020] In the diagram: 1. Door frame, 2. Cylinder, 3. Rotating rod, 4. Pressure reducing damper body, 5. Fixing block, 6. Support plate, 7. Control motor, 8. Threaded rod one, 9. Sliding plate, 10. Rotating shaft, 11. Spur gear one, 12. Spur rack one, 13. Belt pulley assembly, 14. Slider, 15. Spur rack two, 16. Threaded rod two, 17. Spur gear two, 18. Cylinder, 19. Reinforcing fixing rod, 20. Protective housing, 21. Door handle, 22. Pressure sensor. Detailed Implementation

[0021] Reference Figures 1-4 A type of downhole double-opening forward and reverse interlocking pressure-reducing air door, comprising:

[0022] Door frame 1, four clamping cylinders 2 are fixedly connected to the side wall of door frame 1, and rotating rods 3 are rotatably connected to the inner side of each of the four clamping cylinders 2. The four rotating rods 3 are in pairs, and each pair of rotating rods 3 is fixedly connected to the pressure reducing damper body 4. The side wall of the pressure reducing damper body 4 is fixedly connected to a door handle 21, and the two pressure reducing dampers can be manually closed through the door handle 21.

[0023] An interlocking rotating structure is installed on the door frame 1. This structure includes a fixing block 5 fixedly connected to the side wall of the door frame 1. A support plate 6 is fixedly connected to the side wall of the fixing block 5. Two reinforcing fixing rods 19 are fixedly connected between the fixing block 5 and the support plate 6. The reinforcing fixing rods 19 have high structural strength and can effectively resist damage to the structure caused by high pressure. A control motor 7 is fixedly installed on the upper side of the support plate 6. A protective shell 20 is fixedly connected to the upper side of the support plate 6. The protective shell 20 can reduce the impact of ore dust inside the mine and also has a certain ability to resist increased pressure. Ventilation holes are opened on the side wall of the protective shell 20, allowing the internal control motor 7 to have good heat dissipation. Two pressure sensors 22 are fixedly installed on the side wall of the door frame 1. Each pressure sensor 22 is a device that converts the pressure applied to its sensing surface into a measurable electrical signal. Its core is usually a sensing element. When subjected to pressure, it undergoes a slight physical deformation, which changes the element... The electrical characteristics of the component are then processed by the built-in signal conditioning circuit, which compensates for environmental interference and standardizes the original electrical signal. Finally, a precise, stable electrical signal proportional to the applied pressure is provided through the output interface. This electrical signal controls the control motor 7. This is existing technology and will not be described in detail. A threaded rod 8 is fixedly installed at the output end of the control motor 7. A sliding plate 9 is threadedly connected to the outside of the threaded rod 8. The sliding plate 9 is slidably connected to the door frame 1. Two rotating shafts 10 are rotatably connected to the side wall of the door frame 1. A spur gear 11 is fixedly sleeved on the outside of each of the two rotating shafts 10. A rack 12 is fixedly connected to both sides of the sliding plate 9. After the rack 12 moves forward a certain distance, it meshes with the spur gear 11, thereby driving the spur gear 11 to rotate. The two rotating shafts 10 and the two rotating rods 3 are connected by a pulley assembly 13. The pulley assembly 13 consists of two pulleys and a belt, which transmits the power of the rotating shafts 10 to the rotating rods 3.

[0024] A locking structure is installed on the fixed block 5. The locking structure includes a slider 14 that is slidably connected to the inside of the fixed block 5, a rack 15 that is fixedly connected to the inside of the sliding plate 9, a threaded rod 16 that is rotatably connected to the inside of the fixed block 5, the threaded rod 16 being threadedly connected to the slider 14, a spur gear 17 that is fixedly sleeved on the outside of the threaded rod 16, the spur gear 17 meshing with the rack 15, and two locking rods 18 that are fixedly connected to the lower side of the slider 14. The locking rods 18 can block and lock the two pressure reducing damper bodies 4.

[0025] In this invention, firstly, the pressure sensor 22 senses the difference in internal and external pressure, thereby controlling the control motor 7. The output end of the control motor 7 drives the threaded rod 8 to rotate, causing the sliding plate 9 to slide forward. During the sliding process, the engagement of the spur rack 15 and the spur gear 17 causes the threaded rod 16 to rotate, which in turn drives the slider 14 downward. When the slider 14 moves downward a certain distance, the locking rod 18 no longer obstructs the two pressure-reducing damper bodies 4, allowing the pressure-reducing damper bodies 4 to open. The locking structure locks the pressure-reducing damper bodies 4, preventing the dampers from being forced open by a sudden increase in air pressure, and also preventing damage during normal operation. In the case of automatic opening, the pressure-reducing damper body 4 is protected to a certain extent. At the same time, the spur rack 12 can mesh with the spur gear 11, so that the spur gear 11 can drive the rotating shaft 10 to rotate. The rotation of the rotating shaft 10 can drive the rotating rod 3 to rotate through the pulley assembly 13, thereby allowing the two pressure-reducing damper bodies 4 to open outward. Through the interlocking rotation structure, the opening and closing of the two pressure-reducing damper bodies 4 can be controlled simultaneously when the pressure-reducing damper bodies 4 are opened. Furthermore, the opening angle of the pressure-reducing damper bodies 4 can be controlled by the pressure difference, resulting in better pressure relief and eliminating the need for manual control.

Claims

1. A downhole double-leaf interlocked pressure-reducing air door, comprising a door frame (1), characterized in that, The door frame (1) has four clamps (2) fixedly connected to its side wall. The four clamps (2) are rotatably connected to the inner side of each of the four clamps (2). The four rotators (3) are in pairs, and each pair of rotators (3) is fixedly connected to the pressure reducing damper body (4). The door frame (1) is equipped with an interlocking rotation structure, which includes a fixed block (5) fixedly connected to the side wall of the door frame (1). A support plate (6) is fixedly connected to the side wall of the fixed block (5). A control motor (7) is fixedly installed on the upper side of the support plate (6). A threaded rod (8) is fixedly installed at the output end of the control motor (7). A sliding plate (9) is threadedly connected to the outer side of the threaded rod (8). The sliding plate (9) is slidably connected to the door frame (1). Two rotating shafts (10) are rotatably connected to the side wall of the door frame (1). A spur gear (11) is fixedly sleeved on the outer side of each of the two rotating shafts (10). A spur rack (12) is fixedly connected to both sides of the sliding plate (9). The two rotating shafts (10) and the two rotating rods (3) are connected by a belt pulley assembly (13).

2. The downhole split-type forward and reverse interlocking pressure-reducing air door according to claim 1, characterized in that, A locking structure is installed on the fixed block (5). The locking structure includes a slider (14) that is slidably connected to the inside of the fixed block (5). A rack (15) is fixedly connected to the inside of the sliding plate (9). A threaded rod (16) is rotatably connected to the inside of the fixed block (5). The threaded rod (16) is threadedly connected to the slider (14). A spur gear (17) is fixedly sleeved on the outside of the threaded rod (16). The spur gear (17) meshes with the rack (15). Two locking rods (18) are fixedly connected to the lower side of the slider (14).

3. A downhole split-type forward and reverse interlocking pressure-reducing air door according to claim 1, characterized in that, Two reinforcing fixing rods (19) are fixedly connected between the fixing block (5) and the support plate (6).

4. A downhole split-type forward and reverse interlocking pressure-reducing air door according to claim 1, characterized in that, A protective shell (20) is fixedly connected to the upper side of the support plate (6), and ventilation holes are opened on the side wall of the protective shell (20).

5. A downhole split-type forward and reverse interlocking pressure-reducing air door according to claim 1, characterized in that, A door handle (21) is fixedly connected to the side wall of the pressure reducing damper body (4).

6. A downhole split-type forward and reverse interlocking pressure-reducing air door according to claim 1, characterized in that, Two pressure sensors (22) are fixedly installed on the side wall of the door frame (1).

Images