Locking device for explosion-proof cover of central air shaft
The combined structure of the connecting rod, U-shaped clamp and locking bolt solves the problem of the explosion-proof cover not being firmly fixed during the backwind test, achieves firm fixation of the explosion-proof cover, reduces manual labor intensity and avoids safety hazards.
Patent Information
- Application Number
- CN202422961532.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-02
AI Technical Summary
In the prior art, the fixing reliability of explosion-proof covers in the reverse wind test is low, which poses a safety hazard. The commonly used fixing method using supporting columns can easily cause the explosion-proof covers to be blown open.
The utility model adopts a combined structure of a connecting rod, a U-shaped clamp and a locking bolt. The explosion-proof cover is firmly fixed by adjusting the locking bolt and the connecting rod through the detachable connection between the U-shaped clamp and the fixing seat.
The fixing reliability of the explosion-proof cover is improved, the labor intensity is reduced, the operation time is shortened, and the backwind accident caused by loose fixing is avoided.
Smart Images
Figure CN223387365U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ventilation safety equipment in coal mine enterprises, in particular to a locking device for an explosion-proof cover of a central air shaft. Background Art
[0002] According to the requirements of coal mine safety regulations, the main ventilation fan of the mine must undergo a backwind test every year. During the backwind test, due to the change of airflow in the air duct, the explosion-proof door is subjected to a large impact force. In order to prevent the explosion-proof cover from being blown open, the explosion-proof cover needs to be fixed before the backwind test.
[0003] Currently, the common method for securing explosion-proof covers is to use several supporting columns to hold them in place, then remove the supporting columns after the wind-back test. However, this is often unreliable in actual use, and there have even been cases of explosion-proof covers being blown open, posing a safety hazard. Utility Model Content
[0004] In order to solve the above problems in the prior art, the utility model provides a locking device for a central air shaft explosion-proof cover.
[0005] The utility model provides a central air shaft explosion-proof cover locking device adopts the following technical solutions:
[0006] A locking device for a central air shaft explosion-proof cover comprises a connecting rod, both ends of the connecting rod are provided with external threads and are detachably sleeved with U-shaped clamps, the openings of the two U-shaped clamps are arranged back to back, a connecting nut is fixedly connected to the side of the middle part of the U-shaped clamp facing away from the opening, the connecting nut is threadedly connected to the connecting rod, a locking bolt is detachably passed through the two arms of the U-shaped clamp, a fixing seat 1 is fixedly connected to the explosion-proof cover, and a fixing seat 2 is fixed to the counterweight column, one of the U-shaped clamps is detachably connected to the fixing seat 1 by a locking bolt, and the other U-shaped clamp is detachably connected to the fixing seat 2 by a locking bolt.
[0007] By adopting the above technical solution, the device is practical in design, simple in operation, and firmly connected, which reduces labor intensity and shortens the anti-wind operation time, and avoids anti-wind accidents caused by loose locking.
[0008] Optionally, at least two grooves are symmetrically arranged in the middle of the connecting rod.
[0009] By adopting the above technical solution, it is convenient for workers to use a wrench to tighten the connecting rod, thereby improving operational convenience. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a front view of the central air shaft explosion-proof cover locking device of an embodiment of the present utility model.
[0011] Figure 2It is a top view of the central air shaft explosion-proof cover locking device of an embodiment of the present utility model.
[0012] Explanation of the accompanying reference numerals: 1. connecting rod; 10. groove; 2. U-shaped clamp; 3. connecting nut; 4. locking bolt; 5. fixing seat 1; 6. fixing seat 2. DETAILED DESCRIPTION
[0013] The following is combined with Figure 1 -Attached Figure 2 The utility model is described in further detail.
[0014] The present invention discloses a locking device for a central air shaft explosion-proof cover. Figure 1 and Figure 2 The central air shaft explosion-proof cover locking device includes a connecting rod 1, a U-shaped clamp 2, a connecting nut 3, a locking bolt 4, a fixing seat 1 5 and a fixing seat 2 6.
[0015] Reference Figure 1 and Figure 2 The connecting rod 1 is made of a steel rod, and two grooves 10 are symmetrically opened in the middle of the connecting rod 1 to facilitate the use of a wrench to screw the connecting rod 1. Both ends of the connecting rod 1 are turned with external threads; two U-shaped chucks 2 are symmetrically arranged, and the two U-shaped chucks 2 are respectively installed on the two ends of the connecting rod 1, and the openings of the two U-shaped chucks 2 are set back to each other.
[0016] Reference Figure 1 and Figure 2 The connecting nut 3 is welded and fixed to the middle part of the U-shaped clamp 2 and is located on the side away from the outlet. The connecting nut 3 is threadedly connected to the connecting rod 1. The distance between the two U-shaped clamps 2 can be changed by screwing the connecting rod 1; the locking bolt 4 is passed through and installed between the two arms of the U-shaped clamp 2; the fixing seat 1 5 is welded and fixed to the explosion-proof cover, and the fixing seat 2 6 is welded and fixed to the counterweight column. The U-shaped clamp 2 is detachably connected to the fixing seat 1 5 or the fixing seat 2 6 through the locking bolt 4.
[0017] The central air shaft explosion-proof cover locking device of the present utility model is implemented as follows: Before the reverse wind test, the explosion-proof cover needs to be fixed to prevent the wind from changing direction and impacting the explosion-proof cover. One U-shaped clamp 2 is clamped on the fixing seat 1 5 and fixed with a locking bolt 4. The other U-shaped clamp 2 is clamped on the fixing seat 2 6 and fixed with a locking bolt 4. Using a wrench to turn the connecting rod 1, the distance between the two U-shaped clamps 2 can be adjusted, thereby tightening the fixing seat 1 5, providing a certain preload force, and firmly securing the explosion-proof cover. After the test is completed, the locking bolt 4 on the fixing seat 1 5 is removed, and the connecting rod 1 is lifted to exit the device.
[0018] Mounting base 1 5 and mounting base 2 6 are simple to manufacture and install. The connecting rod 1 and U-shaped clamp 2 can be formed and assembled. The locking device allows for overall length adjustment during use, providing a reliable connection and preventing it from falling. Compared to traditional gland methods, this device avoids the cumbersome process of maneuvering large channel steel to locate a pivot point and the potential safety hazards of a loose pivot point. This device is practical in design, simple to operate, and provides a secure connection. It reduces labor intensity, shortens the time required for reverse wind operations, and avoids reverse wind accidents caused by loose locking.
[0019] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.
Claims
1. A locking device for a central air shaft explosion-proof cover, characterized in that: The invention comprises a connecting rod (1), both ends of the connecting rod (1) are provided with external threads and are detachably sleeved with U-shaped chucks (2), the openings of the two U-shaped chucks (2) are arranged opposite to each other, a connecting nut (3) is fixedly connected to the side of the middle part of the U-shaped chuck (2) facing away from the opening, the connecting nut (3) is threadedly connected to the connecting rod (1), a locking bolt (4) is detachably passed through the two arms of the U-shaped chuck (2), a fixing seat (5) is fixedly connected to the explosion-proof cover, and a fixing seat (6) is fixedly connected to the counterweight column, one of the U-shaped chucks (2) is detachably connected to the fixing seat (5) through the locking bolt (4), and the other U-shaped chuck (2) is detachably connected to the fixing seat (6) through the locking bolt (4).
2. The central air shaft explosion-proof cover locking device according to claim 1, characterized in that: At least two grooves (10) are symmetrically arranged in the middle of the connecting rod (1).