Detachable door closer for low-voltage box body

Abstract

The utility model belongs to the technical field of door closers, and particularly relates to a detachable door closer for a low-voltage box body, which comprises a base, an L-shaped support and a driving mechanism, a pair of gourd-shaped through holes are arranged at two ends of the base, and a pair of outer hexagonal plug bolts is arranged at the bottom of a door body and used for hanging and buckling the base. Two parallel clamping plates are fixed to the middle, parallel to the long side, of the base, the L-shaped support comprises a transverse plate and a vertical plate, the vertical plate is movably connected into a limiting groove formed by the two clamping plates, and the lower end face structure of the vertical plate is formed by splicing a limiting right-angle side and an arc-shaped rotating side. According to the device, only the outer hexagonal plug bolt corresponding to the gourd-shaped through hole needs to be arranged at the bottom of the door plate to be closed, a single person can install the door closer on a door body to complete door closing operation, operation is easy, and labor cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of door closers, in particular to a detachable door closer for a low-voltage box. Background Art

[0002] In a natural gas station, the compressor gas turbine is entirely housed in a low-pressure, sealed box. Due to the high temperature inside the compressor gas turbine box and the possibility of natural gas leakage, the box needs to be continuously ventilated in order to reduce the box temperature and remove any possible leaked natural gas. The box ventilation fan is installed outside the box, continuously providing airflow to the box, which is then discharged through the exhaust muffler on the top of the box. When a compressor room is added to the centrifugal compressor unit, the exhaust muffler needs to be led outside the room. Since the location outside the room is far from the original muffler location, the ventilation duct length is increased, and there are many bends, which increases the exhaust resistance of the box, ultimately increasing the compressor gas turbine box pressure from 0.12Mpa to 0.32Mpa, so that a single person cannot close the box after it is opened.

[0003] To address this issue, technicians considered installing a door closer. Most commercially available door closers have a spring-like hydraulic actuator on the head. When the door is opened, it stores energy by compressing the spring, automatically closing the door upon exiting. However, when such door closers are installed on the door leaf of a low-pressure sealed enclosure, the elastic force released by the compressed hydraulic spring is less than the pressure within the enclosure. This prevents the door from accurately and promptly closing to its initial position after opening. This can lead to the door becoming immobilized or even failing to fully close, impacting the operation of the equipment and facilities while also posing safety risks and wasting energy. This method is complex to operate and increases labor costs, making it unsuitable for users. Furthermore, most commercially available door closers are secured to the door body with screws. For a low-pressure sealed enclosure with multiple door leaves, this requires multiple door closers, resulting in high costs. Furthermore, frequent screw removal from the door body during maintenance and replacement can wear out the screw holes, affecting their tightness. Damaged screw holes require repositioning within the door body, which can also cause additional damage. Utility Model Content

[0004] The purpose of the utility model is to provide a detachable door closer for a low-voltage box, so as to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The cam is secured to the bottom of the door frame and has an L-shaped frame, which is adapted to engage the bottom end of the door frame and engage with the bottom end of the door frame.

[0007] Furthermore, the feed assembly includes an adjusting handle, a fixed handle, a rising spring, and a rising block, wherein the adjusting handle and the fixed handle are hinged by rivets, the front end of the adjusting handle, the rising spring, and the rising block are abutted in sequence and are all arranged in the front end inner cavity of the fixed handle, and the guide rod passes through the adjusting handle, the fixed handle, the rising spring, the rising block and the cross plate in sequence.

[0008] Furthermore, the locking assembly includes a locking plate, a locking spring and a clamping screw. The locking plate and the locking spring are stacked and arranged on the upper surface of the front end of the fixed handle, and the guide rod is inserted therethrough. The clamping screw is clamped with the front end of the locking plate and fixed to the front end of the fixed handle.

[0009] Furthermore, a triangular reinforcing flat iron is provided at the connection between the horizontal plate and the vertical plate.

[0010] The beneficial effects of the utility model are:

[0011] The door closer provided by the present invention, when closing the low-pressure sealed box, is connected by hooking the door closer with a bolt through the gourd-shaped through hole on the base to lock it and prevent displacement. Then, the adjustment handle is pressed to drive the guide rod to move the pulley inward. At this time, the pulley is close to the door leaf. As the guide rod moves deeper and deeper inward, the pulley moves forward along the door leaf, and the L-shaped bracket rotates until the limiting right-angle edge of the vertical plate in the limiting groove formed by the two plywood is completely perpendicular to the base. Then, the low-pressure sealed box door leaf can be closed. At this time, the door lock on the box door leaf can be locked to achieve complete closure of the low-pressure sealed box. This device only requires setting a hexagonal bolt corresponding to the gourd-shaped through hole at the bottom of the door panel to be closed, so that a single person can install the door closer on the door body to complete the door closing operation. The operation is simple and greatly reduces labor costs.

[0012] During disassembly, the door closer device provided by this utility model is disassembled by pressing the locking plate to release the locking state between the locking plate and the guide rod. The guide rod is then pulled out to drive the pulley to move outward. At this time, the door closer is lifted upward to separate the door closer from the external hexagonal plug bolt, and then the door closer can be disassembled. After the door leaf closing operation is completed, the door closer device can also be used to close other low-pressure sealed box door leaves, which has high utilization rate, is fast and convenient, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a structural diagram of the base of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the L-shaped bracket of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the drive mechanism of the utility model;

[0017] In the figure: 1. Base; 2. Gourd-shaped through hole; 3. Hexagonal plug bolt; 4. Clamp; 5. First screw hole; 6. Connecting column; 7. L-shaped bracket; 8. Horizontal plate; 9. Vertical plate; 10. Triangular reinforcing flat iron; 11. Limiting right-angle edge; 12. Arc-shaped rotating edge; 13. Limiting hole; 14. Second screw hole; 15. Second bolt; 16. Driving mechanism; 17. Feed assembly; 18. Locking assembly; 19. Guide rod; 20. Pulley; 21. Adjusting handle; 22. Fixed handle; 23. Rivet; 24. Lifting spring; 25. Lifting block; 26. Locking plate; 27. Locking spring; 28. Snap screw. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] The utility model provides a detachable door closer for a low-voltage box.

[0020] Example:

[0021] like Figure 1 As shown, it includes a base 1, an L-shaped bracket 7 and a driving mechanism 16, the driving mechanism 16 includes a fixed part and a lifting part, wherein the fixed part includes a feeding assembly 17 and a locking assembly 18, and the lifting part includes a guide rod 19 and a pulley 20 fixed at its lower end.

[0022] like Figure 2 and Figure 3As shown, a pair of gourd-shaped through holes 2 are provided at both ends of the base 1, and a pair of external hexagonal bolts 3 are provided at the bottom of the door body to be closed for hooking and connecting the base. Two parallel clamping plates 4 are fixed on the middle of the base 1 parallel to the long side, and the L-shaped bracket 7 includes a horizontal plate 8 and a vertical plate 9. A triangular reinforcing flat iron 10 is provided at the connection between the top of the vertical plate 9 and the horizontal plate 8.

[0023] A first screw hole 5 is provided at the same position at the bottom of the vertical plate 9 and the plywood 4, and a connecting column 6 is provided to pass through the first screw hole 5. The vertical plate 9 is movably connected to the limiting groove formed by the two plywood 4 through the connecting column 6. The lower end surface structure of the vertical plate 9 is a limiting right-angle edge 11 spliced with an arc-shaped rotating edge 12. When the door closer is in effect, the L-shaped bracket 7 can rotate 90° around the connecting column 6 in the limiting groove.

[0024] The fixing portion is arranged on the transverse plate 8, and the guide rod 19 passes through the transverse plate 8 and the fixing portion. By controlling the feeding assembly 17 and the locking assembly 18, the guide rod 19 and the pulley 20 can be driven to move to realize door closing.

[0025] A limiting hole 13 and a second screw hole 14 are formed at the front end of the transverse plate 8 . The driving mechanism 16 passes through the limiting hole 13 and is fixedly connected to the transverse plate 8 via a second bolt 15 .

[0026] like Figure 4 As shown, the feed assembly 17 includes an adjusting handle 21, a fixed handle 22, a rising spring 24, and a rising block 25, wherein the adjusting handle 21 and the fixed handle 22 are hinged by a rivet 23, and the front end of the adjusting handle 21, the rising spring 24 and the rising block 25 are abutted in sequence and are all arranged in the front end inner cavity of the fixed handle 22, and the guide rod 19 passes through the adjusting handle 21, the fixed handle 22, the rising spring 24 and the rising block (25) and the cross plate 8 in sequence.

[0027] The locking assembly 18 includes a locking plate 26, a locking spring 27 and a clamping screw 28. The locking plate 26 and the locking spring 27 are stacked and arranged on the upper surface of the front end of the fixed handle 22, and the guide rod 19 is inserted therethrough. The clamping screw 28 is clamped with the front end of the locking plate 26 and fixed to the front end of the fixed handle 22.

[0028] When the user presses the adjusting handle 21 again, the locking spring 27 on the guide rod 19 pushes the locking plate 26 to the inclined state and the guide rod 19 to enter the locked state, so that the guide rod 19 cannot move outward. At this time, the user continues to press the adjusting handle 21 to continue to drive the guide rod 19 to move the pulley 20 inward, and the pulley 20 moves forward along the door leaf. The L-shaped bracket 7 rotates in the limit groove in the direction of the door body cross section until the bottom of the vertical plate 9 in the limit groove is perpendicular to the base 2, the limit right-angled side 11 is close to the bottom of the limit groove for limit, and the door leaf is completely closed. At this time, the door lock on the door leaf is locked. After closing the door leaf, the user can press the locking plate 26 to release the locking state between the locking plate 26 and the guide rod 19, pull out the guide rod 19 to drive the pulley 20 to move outward, and then lift the door closer upward to separate the door closer from the external hexagonal plug bolt 3, and then the door closer can be disassembled.

[0029] The contents not described in detail in the above specification belong to the prior art known to those skilled in the art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable door closer for a low-voltage box, characterized by: The door comprises a base (1), an L-shaped bracket (7) and a driving mechanism (16). A pair of gourd-shaped through holes (2) are provided at both ends of the base (1). A pair of external hexagonal plug bolts (3) are provided at the bottom of the door body for hooking and connecting the base. Two parallel clamping plates (4) are fixed on the middle of the base (1) parallel to the long side. The L-shaped bracket (7) comprises a horizontal plate (8) and a vertical plate (9). The vertical plate (9) is movably connected to the limiting groove formed by the two clamping plates (4) through a connecting column (6). The lower end surface structure of the vertical plate (9) is a limiting right-angle side (11) assembled together. The invention relates to a door lock mechanism comprising a fixed portion and a lifting portion, wherein the fixed portion comprises a feeding assembly (17) and a locking assembly (18); the lifting portion comprises a guide rod (19) and a pulley (20) fixed at its lower end; the fixed portion is arranged on a transverse plate (8); the guide rod (19) passes through the transverse plate (8) and the fixed portion; and the guide rod (19) and the pulley (20) are driven to move by controlling the feeding assembly (17) and the locking assembly (18) to realize door closing.

2. The detachable door closer for a low-voltage box according to claim 1, characterized in that: The feeding assembly (17) includes an adjusting handle (21), a fixed handle (22), a rising spring (24), and a rising block (25), wherein the adjusting handle (21) and the fixed handle (22) are hinged by a rivet (23), the front end of the adjusting handle (21), the rising spring (24), and the rising block (25) are abutted in sequence and are all arranged in the front end inner cavity of the fixed handle (22), and the guide rod (19) passes through the adjusting handle (21), the fixed handle (22), the rising spring (24), the rising block (25), and the horizontal plate (8) in sequence.

3. The detachable door closer for a low-voltage box according to claim 2, characterized in that: The locking assembly (18) includes a locking plate (26), a locking spring (27) and a clamping screw (28). The locking plate (26) and the locking spring (27) are stacked and arranged on the upper surface of the front end of the fixed handle (22). The guide rod (19) is inserted therein. The clamping screw (28) is clamped with the front end of the locking plate (26) and fixed to the front end of the fixed handle (22).

4. The detachable door closer for a low-voltage box according to any one of claims 1 to 3, characterized in that: A triangular reinforcing flat iron (10) is provided at the connection between the horizontal plate (8) and the vertical plate (9).

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