Air valve for tunnel blasting ventilation

Abstract

The utility model discloses an air valve for tunnel blasting ventilation, and belongs to the technical field of air valves. Comprising an air valve, a handle is rotatably arranged on the air valve, a locking structure is arranged on the air valve, the locking structure comprises a fixing block located below the handle, an arc-shaped groove used for rotation of the handle is formed in the top of the fixing block, first insertion holes are formed in the two sides of the fixing block, a plurality of second insertion holes are formed in the handle, and the second insertion holes are communicated with the arc-shaped groove. A fixing rod used for being clamped into the first inserting hole and the second inserting hole is arranged on one side of the fixing block in a telescopic mode. According to the utility model, when the handle is fixed, the position of the handle can be fixed only by moving the fixing rod, other tools are not needed, and specific skills and strength are not needed, so that the operation is easy. Moreover, after being used for a long time, the air valve cannot be loosened or broken, and the handle cannot move accidentally, so that the opening degree of the air valve cannot be suddenly changed, and safety accidents cannot be caused.

Description

Technical Field

[0001] This utility model relates to an air valve for ventilation during tunnel blasting, belonging to the field of air valve technology. Background Technology

[0002] Blasting is a common construction method during tunnel construction. However, blasting operations generate large amounts of toxic gases, dust, and other harmful substances. If these harmful substances are not removed in time, they can seriously affect the working environment and health of workers inside the tunnel, and may even cause safety accidents. To ensure air quality inside the tunnel, ventilation systems are usually installed to exhaust toxic gases and dust, ensuring that the working environment after blasting meets safety standards.

[0003] In practical use, air valves are generally adjusted by a handle. To maintain the valve's opening even when the air pressure is unstable, a locking mechanism is usually added to the handle.

[0004] Existing locking mechanisms typically involve threaded holes in the handle or mounting base, with the handle's position secured by tightening bolts. However, bolt locking usually requires tools, skill, and strength, making operation even more difficult in confined spaces or poor visibility. Furthermore, bolts can loosen or break after prolonged use, causing the handle to move unexpectedly, resulting in sudden changes in the valve opening and potentially leading to safety hazards. Utility Model Content

[0005] The technical problem this invention aims to solve is to provide an air valve for tunnel blasting ventilation. It addresses the issue that existing locking mechanisms typically involve threaded holes in the handle or mounting base, with the handle's position fixed by tightening bolts. However, bolt locking usually requires tools, skill, and strength, making operation even more difficult in confined spaces or poor visibility. Furthermore, after prolonged use, bolts may loosen or break, causing accidental handle movement and sudden changes in the valve's opening, potentially leading to safety accidents.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution: a wind valve for ventilation in tunnel blasting, comprising a wind valve, wherein a handle is rotatably provided on the wind valve, characterized in that: a locking structure is provided on the wind valve, the locking structure comprising a fixing block located below the handle, an arc-shaped groove for rotating the handle being provided on the top of the fixing block, a first insertion hole being provided on both sides of the fixing block, a plurality of second insertion holes being provided on the handle, and a fixing rod for engaging with the first insertion hole and the second insertion hole being provided on one side of the fixing block.

[0007] By adopting the above technical solution, after the air valve is adjusted to a suitable opening, the first insertion hole on both sides of the fixing block aligns with one of the second insertion holes. When it is necessary to fix the handle, simply utilize the telescopic mechanism of the fixing rod; by moving the fixing rod, it can be inserted into the first and second insertion holes without detaching from the fixing block and the handle. The fixing rod's limiting effect on the handle's rotation direction effectively fixes its position. With this structure, fixing the handle only requires moving the fixing rod, eliminating the need for other tools, specific skills, or force, making operation easy. Furthermore, even after prolonged use, it will not loosen or break, preventing accidental movement of the handle and thus avoiding sudden changes in the air valve opening, preventing safety accidents.

[0008] The present invention is further configured such that: a telescopic groove is provided inside the fixing block; an elastic element is provided outside the fixing rod and located inside the telescopic groove; an abutment piece is provided on one side of the elastic element on the fixing rod; protrusions are provided on both sides of one end of the fixing rod; two grooves for the two protrusions to be engaged are provided in the insertion hole on the other side of the fixing block; and an annular groove communicating with the grooves is provided inside the insertion hole on the other side of the fixing block along the circumferential direction.

[0009] By employing the above technical solution, when the handle needs to be fixed, the force applied to the round rod away from the handle is released, causing the elastic element to release its elastic force. This allows the abutment piece to move towards the handle within the telescopic groove, thereby moving the end of the fixing rod with the protrusion from one insertion hole on one side of the fixing block, along another insertion hole, to the other insertion hole on the other side of the fixing block. Then, the round rod is rotated so that the two protrusions align with the groove, and the spring continues to release its elastic force, causing the two protrusions to enter the rotating groove from the groove. Then, the round rod is rotated again so that the two protrusions are engaged in the rotating groove. When the air valve vibrates, the two protrusions will not disengage from the rotating groove, thus ensuring that the fixing rod is securely engaged with the fixing block and the handle.

[0010] The present invention is further configured such that a round rod is provided at the end of the fixing rod away from the protrusion.

[0011] By adopting the above technical solution, the round rod design facilitates the rotation of the fixed rod by the operator, thereby improving the efficiency of locking and unlocking the handle. Furthermore, it makes operation easier for operators when the air valve is installed in situations with limited space or poor visibility.

[0012] The present invention is further configured such that: both ends of the air valve are rotatably provided with hooks, and both hooks can be detachably inserted into several of the insertion holes.

[0013] By adopting the above technical solution, when it is necessary to further limit the rotation direction of the handle, simply insert the two hooks into the two sockets.

[0014] The present invention is further configured such that: a hinge seat is provided on the outer peripheral wall at both ends of the air valve, a connecting rod is rotatably provided in each of the two hinge seats, and the hook is provided at the end of the connecting rod.

[0015] By adopting the above technical solution, when it is necessary to insert the hook into the second insertion hole or to remove the hook from the second insertion hole, the hook can be moved closer to or away from the handle by rotating the connecting rod, which is convenient for operation.

[0016] The present invention is further configured such that: the hook ring includes a main body, one end of the main body is hinged to a fastening part, the other end of the main body is provided with a slot, and one end of the fastening part is provided with a locking block for engaging the slot.

[0017] By adopting the above technical solution, when it is necessary to use two hooks to restrict the rotation of the handle, both connecting rods at both ends are rotated towards the handle. Then, one end of the latching part on each hook is moved towards the side closer to the main body, causing the locking block to disengage from the groove, thus opening the hook. Next, the main body of the hook is inserted into the second insertion hole, and then one end of the latching part is moved away from the main body until the locking block engages in the groove, thus closing the hook and further restricting the rotation of the handle.

[0018] When the main body of the hook ring is inserted into the second insertion hole, the part of the handle that is inserted into the hook ring is located at the end of the locking block away from the connecting rod.

[0019] The present invention is further provided with anti-slip texture on the outer peripheral wall of the handle.

[0020] By adopting the above technical solution, the friction of the handle surface can be significantly improved. Whether in a wet or dry environment, the anti-slip texture can provide a stable grip, ensuring that the user can hold the handle firmly.

[0021] The beneficial effects of this utility model are as follows: When the air valve is adjusted to a suitable opening, the first insertion hole on both sides of the fixing block aligns with one of the second insertion holes. When it is necessary to fix the handle, simply utilize the telescopic mechanism of the fixing rod; by moving the fixing rod, it can be inserted into the first and second insertion holes without detaching from the fixing block and the handle. By limiting the handle's rotation direction with the fixing rod, the handle's position can be fixed. With this structure, fixing the handle only requires moving the fixing rod, eliminating the need for other tools, specific skills, or force, making operation easy. Furthermore, even after prolonged use, it will not loosen or break, preventing accidental movement of the handle and thus avoiding sudden changes in the air valve opening, preventing safety accidents. Attached Figure Description

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

[0023] Figure 2 This is a schematic diagram of the hook and ring structure in this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the fixing rod in this utility model;

[0025] Figure 4 This is a half-sectional view of the fixing block in this utility model;

[0026] Figure 5 This is a schematic diagram of the handle in this utility model.

[0027] In the diagram: 1. Air valve; 2. Handle; 3. Fixing block; 4. Arc-shaped groove; 5. Insertion hole one; 6. Insertion hole two; 7. Fixing rod; 8. Telescopic groove; 9. Elastic element; 10. Abutment piece; 11. Protrusion; 12. Groove; 13. Annular groove; 14. Hook ring; 15. Hinge seat; 16. Connecting rod; 17. Main body; 18. Fastening part; 19. Slot; 20. Locking block; 21. Round rod; 22. Anti-slip texture; 23. Stop block; 24. Extension block. Detailed Implementation

[0028] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0029] like Figure 1 and Figure 4 As shown, a ventilation valve for tunnel blasting includes a valve 1, a handle 2 rotatably mounted on the valve 1, and a locking structure fixed on the valve 1. The locking structure includes a fixing block 3 integrally formed with the valve 1 below the handle 2. The top of the fixing block 3 has an arc-shaped groove 4 for rotating the handle 2. Both sides of the fixing block 3 have insertion holes 5. The handle 2 has several insertion holes 6. A fixing rod 7 is telescopically mounted on one side of the fixing block 3 for engaging with the insertion holes 5 and the insertion holes 6. In this embodiment, the fixing rod 7 is made of a high-strength material.

[0030] After the air valve 1 is adjusted to the appropriate opening, the first 5 on both sides of the fixing block 3 aligns with one of the second 6. When it is necessary to fix the handle 2, simply use the telescopic mechanism of the fixing rod 7. By moving the fixing rod 7, the fixing rod 7 can be inserted into the first 5 and the second 6 without detaching from the fixing block 3 and the handle 2. The fixing rod 7 limits the rotation direction of the handle 2, thus fixing its position. With this structure, fixing the handle 2 only requires moving the fixing rod 7, without the need for other tools, specific skills, or force, making operation easy. Furthermore, even after prolonged use, it will not loosen or break, preventing accidental movement of the handle 2 and thus avoiding sudden changes in the opening of the air valve 1, preventing safety accidents.

[0031] like Figure 3 and Figure 4 As shown, a telescopic groove 8 is provided inside one side of the fixing block 3. An elastic element 9 is sleeved inside the telescopic groove 8 on the outside of the fixing rod 7. An abutment piece 10 is integrally formed on the outer peripheral wall of the fixing rod 7 on the side of the elastic element 9 near the handle 2. An extension block 24 is integrally formed at one end of the fixing rod 7. A protrusion 11 is integrally formed on both sides of the extension block 24. A stop block 23 is integrally formed on both sides of the insertion hole 5 on the other side of the fixing block 3. The two ends of the two stop blocks 23 that are close to each other are formed with grooves 12 for the protrusion 11 to be inserted. An annular groove 13 connected to the groove 12 is provided in the circumferential direction inside the insertion hole 5 on the other side of the fixing block 3. In this embodiment, the elastic element 9 is a spring.

[0032] Among them, the end of the fixing rod 7 that is away from the protrusion 11 and located outside the fixing block 3 has a round rod 21 integrally formed perpendicular to the fixing rod 7.

[0033] Furthermore, the total diameter of the extension block 24 and the protrusion 11 is equal to the diameter of the socket 5 or the socket 6.

[0034] To release the rotation restriction on handle 2, first rotate the round rod 21 so that both protrusions 11 move to the point where the annular groove 13 connects with the recess 12. Then, simply move the fixing rod 7 away from handle 2 using the round rod 21, causing the two protrusions 11 to move out of the insertion hole 5 on the other side of the fixing block 3 along the recess 12, and then along the insertion hole 6 until the two protrusions 11 move into the insertion hole 5 on one side of the fixing block 3. At this time, the abutment piece 10 moves together with the fixing rod 7, causing the elastic element 9 to be compressed within the telescopic groove 8, generating elastic force. This releases the rotation restriction on handle 2 by the fixing rod 7. Then, the operator can continue to move the round rod 21 away from handle 2 while rotating handle 2.

[0035] When it is necessary to fix the handle 2, the force applied to the round rod 21 away from the handle 2 is released, causing the elastic element 9 to release its elastic force. This causes the abutment piece 10 to move closer to the handle 2 within the telescopic groove 8, thereby moving the end of the fixing rod 7 with the protrusion 11 from the insertion hole 5 on one side of the fixing block 3, along the insertion hole 6, to the insertion hole 5 on the other side of the fixing block 3. Then, the round rod 21 is rotated so that the two protrusions 11 align with the groove 12. The spring continues to release its elastic force, causing the two protrusions 11 to enter the rotating groove from the groove 12. Then, the round rod 21 is rotated again so that the two protrusions 11 are engaged in the rotating groove. When the air valve 1 vibrates, the two protrusions 11 will not disengage from the rotating groove, thus ensuring that the fixing rod 7 is securely engaged on the fixing block 3 and the handle 2.

[0036] The circular rod 21 facilitates the rotation of the fixing rod 7 by the operator, thereby improving the efficiency of locking and unlocking the handle 2. Furthermore, it makes operation easier for the operator when the air valve 1 is installed in situations with limited space or poor visibility.

[0037] like Figure 1 and Figure 2 As shown, hooks 14 are rotatably provided at both ends of the air valve 1. Hinges 15 are fixed on the outer peripheral walls of both ends of the air valve 1. Connecting rods 16 are rotatably provided in both hinges 15. Hooks 14 are fixed to the end of the connecting rod 16 away from the hinges 15. Both hooks 14 can be detachably inserted into several insertion holes 6. Hooks 14 include a C-shaped main body 17. One end of the main body 17 is hinged to a fastening part 18. A slot 19 is opened on the inner side of the other end of the main body 17. One end of the fastening part 18 is integrally formed with a locking block 20 for locking into the slot 19.

[0038] When it is necessary to use the two hooks 14 to restrict the rotation of the handle 2, rotate both ends of the connecting rod 16 towards the handle 2. Then, move one end of the fastening part 18 on each hook 14 towards the side closer to the main body 17, so that the locking block 20 disengages from the groove 12, thereby opening the hook 14. Next, insert the main body 17 of the hook 14 into the second insertion hole 6, and then move one end of the fastening part 18 away from the main body 17 until the locking block 20 engages with the groove 12, thereby closing the hook 14 and further restricting the rotation of the handle 2.

[0039] When the main body 17 of the hook ring 14 is inserted into the second insertion hole 6, the part of the handle 2 that is engaged in the hook ring 14 is located at the end of the locking block 20 away from the connecting rod 16.

[0040] When it is necessary to release the restriction of the two hooks 14 on the handle 2, move one end of the fastening part 18 on each of the two hooks 14 toward the side closer to the main body 17, so that the locking block 20 disengages from the groove 12 and opens the hooks 14. Then, move the hooks 14 so that the handle 2 disengages from the opening of the hooks 14, thereby releasing the restriction of the two hooks 14 on the handle 2.

[0041] like Figure 5 As shown, anti-slip texture 22 is provided on the outer peripheral wall of the handle 2.

[0042] The anti-slip texture 22 significantly improves the friction of the handle 2 surface, providing a stable grip in both wet and dry environments, ensuring that the user can firmly hold the handle 2. At the same time, the anti-slip texture 22 also helps to distribute pressure and reduce the direct contact area between the handle 2 and the user's hand, thereby reducing fatigue caused by prolonged use to some extent.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ventilation valve for tunnel blasting ventilation, comprising a valve (1), wherein a handle (2) is rotatably disposed on the valve (1), characterized in that: The air valve (1) is provided with a locking structure, which includes a fixing block (3) located below the handle (2). The top of the fixing block (3) is provided with an arc-shaped groove (4) for rotating the handle (2). The fixing block (3) has a first insertion hole (5) on both sides. The handle (2) has several second insertion holes (6). The fixing block (3) has a fixing rod (7) on one side that is telescopically provided for locking into the first insertion hole (5) and the second insertion hole (6).

2. The air valve for tunnel blasting ventilation according to claim 1, characterized in that: The fixing block (3) has a telescopic groove (8) inside, and an elastic element (9) is provided outside the fixing rod (7) in the telescopic groove (8). An abutment piece (10) is provided on the fixing rod (7) on one side of the elastic element (9).

3. The air valve for tunnel blasting ventilation according to claim 2, characterized in that: The fixing rod (7) has protrusions (11) on both sides of one end. The insertion hole (5) on the other side of the fixing block (3) has two grooves (12) for the two protrusions (11) to be inserted. The insertion hole (5) on the other side of the fixing block (3) has an annular groove (13) connected to the groove (12) along the circumferential direction.

4. The air valve for tunnel blasting ventilation according to claim 3, characterized in that: The fixed rod (7) has a round rod (21) at one end away from the protrusion (11).

5. A ventilation valve for tunnel blasting ventilation according to claim 1, characterized in that: Both ends of the air valve (1) are rotatably provided with hooks (14), and both hooks (14) can be detachably inserted into several of the insertion holes (6).

6. A ventilation valve for tunnel blasting ventilation according to claim 5, characterized in that: The air valve (1) is provided with hinge seats (15) on the outer peripheral walls at both ends, and a connecting rod (16) is rotatably provided in each of the two hinge seats (15), and the hook ring (14) is provided at the end of the connecting rod (16).

7. A ventilation valve for tunnel blasting ventilation according to claim 6, characterized in that: The hook (14) includes a main body (17), one end of which is hinged to a fastening part (18), and the other end of the main body (17) has a slot (19) on its inner side. One end of the fastening part (18) is provided with a locking block (20) for locking into the slot (19).

8. A ventilation valve for tunnel blasting ventilation according to claim 1, characterized in that: The outer peripheral wall of the handle (2) is provided with anti-slip texture (22).

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