A device for measuring a safe step distance of a working face

Abstract

The utility model provides a kind of face of safety step distance measuring device, comprising: sleeve, positioning rod, setting in sleeve, positioning rod and sleeve movably connect;Support piece is uniformly provided with at least three with sleeve as center, and support piece movably sets in one end of sleeve;Adjusting mechanism is set between support piece and sleeve to adjust the angle of support piece relative to sleeve;Measuring mechanism is set in the other end of sleeve to measure safety step distance.According to the utility model, when the face of safety step distance measuring device is placed in horizontal plane, the support piece evenly arranged relative to sleeve can play the role of support, when it is needed to install secondary lining trolley, inverted arch trestle and other positions, the angle of support piece relative to sleeve is adjusted by adjusting mechanism, so that the support piece clamps the protruding part of secondary lining trolley and inverted arch trestle, the support piece plays the role of clamping, so that it provides stable measuring environment for measuring mechanism, and is suitable for the use of multiple installation surfaces.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a device for measuring the safe step distance at the tunnel face. Background Technology

[0002] During tunnel construction, the surrounding rock within a certain distance behind the tunnel face, after only simple initial support, is in a relatively unstable state, posing various risks such as mudslides, water inrushes, and collapses. A tunnel face safety distance measuring device can monitor the distance between the secondary lining trolley and the tunnel face, and between the invert arch trestle and the tunnel face in real time, helping construction personnel to promptly grasp the relationship between construction progress and safety distance, ensuring construction safety. However, existing safety distance measuring devices are easily affected by the construction site, operating space, and different installation surfaces, and cannot be used under different installation surfaces. Therefore, this utility model proposes a tunnel face safety distance measuring device to improve the above-mentioned problems. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defect that the existing face safety step distance measuring device cannot be used under different installation surfaces, thereby providing a face safety step distance measuring device.

[0004] To address the aforementioned problems, this utility model provides a working face safety step distance measuring device, comprising:

[0005] casing,

[0006] A positioning rod is disposed inside the sleeve, and the positioning rod and the sleeve are movably connected;

[0007] Support members are evenly arranged in at least three around the sleeve, and the support members are movably disposed at one end of the sleeve;

[0008] An adjustment mechanism is provided between the support member and the sleeve to adjust the angle of the support member relative to the sleeve.

[0009] A measuring mechanism is located at the other end of the sleeve to measure the safety step distance.

[0010] Preferably, a first threaded ring is provided on the outside of the positioning rod, and a second threaded ring is provided inside the sleeve. The positioning rod and the sleeve are screwed together by the first threaded ring and the second threaded ring.

[0011] Preferably, the positioning rod has a sharp end near one end of the support member, and a first operating ring is provided at the other end of the positioning rod.

[0012] Preferably, one end of the support member is provided with a clamping part, which extends toward the positioning rod.

[0013] Preferably, the adjusting mechanism includes a first mounting ring and a second mounting ring, wherein the first mounting ring is disposed at one end of the sleeve near the support member, and the first mounting ring and the sleeve are rotatably connected; the second mounting ring is located near the first mounting ring and is movably connected to the sleeve.

[0014] The second mounting ring has three first rotating parts evenly arranged around the center of the sleeve, which correspond to the support member. Each first rotating part and the corresponding support member are respectively provided with a first rotating member. The two ends of the first rotating member are rotatably connected to the corresponding first rotating part and the support member.

[0015] The first mounting ring has three second rotating parts evenly arranged around the sleeve, corresponding to the support member. Each support member has a rotating groove near the second rotating part. A second rotating member is arranged between each second rotating part and the corresponding rotating groove. The two ends of the second rotating member are rotatably connected to the corresponding second rotating part and the rotating groove, respectively.

[0016] Preferably, a pair of limiting rings are provided at one end of the sleeve near the support member, and the first mounting ring is disposed between the pair of limiting rings.

[0017] Preferably, a third threaded ring is provided on the outside of the sleeve, and a fourth threaded ring is provided on the inside of the second mounting ring. The sleeve and the second mounting ring are screwed together by the third threaded ring and the fourth threaded ring.

[0018] Preferably, a second operating ring is provided at the end of the sleeve away from the support member, and multiple toothed grooves are evenly provided on the outer sides of the first operating ring and the second operating ring respectively.

[0019] Preferably, the measuring mechanism is a laser rangefinder, which is located at the center of the first operating ring on the side away from the positioning rod.

[0020] The working face safety step distance measuring device provided by this utility model has the following beneficial effects:

[0021] 1. When the face safety step distance measuring device is placed on a horizontal plane, the support members evenly arranged relative to the sleeve can act as a support. When it is necessary to install the secondary lining trolley, inverted arch bridge or other positions, the angle of the support members relative to the sleeve can be adjusted by the adjustment mechanism, so that the support members clamp the protruding parts of the secondary lining trolley or inverted arch bridge, and the support members play a clamping role, so as to provide a stable measuring environment for the measuring mechanism and adapt to the use of various installation surfaces.

[0022] 2. This utility model also forms a linkage between the sleeve, the first mounting ring, the first rotating member, the support member, the second rotating member, and the second mounting ring. When the position of the second mounting ring relative to the first mounting ring is changed, the angle of the linked support member is also changed, thereby adjusting the angle of the corresponding support member so that the clamping part of the support member can clamp the protruding part of the mounting surface. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the assembly of this utility model;

[0024] Figure 2 This is a schematic diagram of the clamping part structure of this utility model.

[0025] Figure 3 This is a schematic diagram of the installation of the positioning rod structure of this utility model.

[0026] The reference numerals in the attached figures are as follows:

[0027] 1. Sleeve; 2. Positioning rod; 3. Support component; 4. Sharp end; 5. First operating ring; 6. Clamping part; 7. First mounting ring; 8. Second mounting ring; 9. First rotating part; 10. First rotating component; 11. Second rotating part; 12. Rotating groove; 13. Second rotating component; 14. Limiting ring; 15. Second operating ring; 16. Toothed groove; 17. Laser rangefinder. Detailed Implementation

[0028] like Figure 1-3 As shown, this utility model provides a working face safety step distance measuring device, which includes:

[0029] A sleeve 1 and a positioning rod 2 are disposed inside the sleeve 1, and the positioning rod 2 is movably connected to the sleeve 1; at least three support members 3 are evenly arranged around the sleeve 1, and the support members 3 are movably disposed at one end of the sleeve 1; an adjustment mechanism is disposed between the support member 3 and the sleeve 1 to adjust the angle of the support member 3 relative to the sleeve 1; and a measuring mechanism is disposed at the other end of the sleeve 1 to measure the safety step distance. Figure 1-3 As shown, a face safety step distance measuring device has a sleeve 1 that serves as an overall support and adjustment base, and a positioning rod 2 that is adjustable relative to the sleeve 1. When the face safety step distance measuring device is placed on a horizontal plane, the support members 3, which are evenly arranged relative to the sleeve 1, can act as supports. When it is necessary to install secondary lining trolleys, inverted arch bridges, or other locations, the angle of the support members 3 relative to the sleeve 1 can be adjusted by the adjustment mechanism. This allows the support members 3 to clamp the protruding parts of the secondary lining trolleys and inverted arch bridges, thus providing a stable measuring environment for the measuring mechanism and making it suitable for use on various installation surfaces.

[0030] In some embodiments, a first threaded ring is provided on the outside of the positioning rod 2, and a second threaded ring is provided inside the sleeve 1. The positioning rod 2 and the sleeve 1 are screwed together by the first threaded ring and the second threaded ring. Figure 1-3 As shown, the length of the adjusting positioning rod 2 relative to the sleeve 1 is adjusted by screwing the first threaded ring and the second threaded ring, thereby adjusting the adjusting mechanism so that the angle of the support 3 relative to the sleeve 1 can be adjusted.

[0031] In some embodiments, the positioning rod 2 has a sharp end 4 at one end near the support member 3, and a first operating ring 5 at the other end of the positioning rod 2. For example... Figure 1-3 As shown, when facing a horizontal surface inside a tunnel or an inverted arch bridge or other installation surface, the positioning rod 2 can be rotated by the first operating ring 5 to adjust the positioning rod 2 relative to the installation surface, so that its sharp end 4 can extend into the installation surface. Then, the support member 3 is used to clamp it, thereby improving the stability effect. When the installation surface is a soft soil layer, its sharp end 4 is sufficient to extend into it. When it is a hard soil layer, a small hole can be drilled first by a drilling rig, and then the positioning rod 2 can be inserted into the small hole. A limiting strip is then inserted between the positioning rod 2 and the small hole.

[0032] In some embodiments, one end of the support member 3 is provided with a clamping part 6, which extends toward the positioning rod 2. For example... Figure 1-3 As shown, the shape of the support member 3 can be a checkmark or an L-shape. When it is installed on a horizontal plane, it is supported on the horizontal plane by the short sides of the three support members 3. Since the support member 3 and the sleeve 1 are limited by the adjustment mechanism, the angles of the three support members 3 relative to the sleeve 1 are consistent, so that when the short sides of the support members 3 are supported, the entire device can be kept horizontal.

[0033] In some embodiments, the adjusting mechanism includes a first mounting ring 7 and a second mounting ring 8. The first mounting ring 7 is disposed at one end of the sleeve 1 near the support member 3, and the first mounting ring 7 and the sleeve 1 are rotatably connected. The second mounting ring 8 is close to the first mounting ring 7 and is movably connected to the sleeve 1.

[0034] The second mounting ring 8 is evenly provided with three first rotating parts 9 corresponding to the support member 3, with the center of the sleeve 1 as the center. Each first rotating part 9 and the corresponding support member 3 are respectively provided with a first rotating member 10. The two ends of the first rotating member 10 are rotatably connected to the corresponding first rotating part 9 and the support member 3 respectively.

[0035] The first mounting ring 7 has three second rotating parts 11 evenly arranged around the sleeve 1, corresponding to the support member 3. Each support member 3 has a rotating groove 12 near the second rotating part 11. A second rotating member 13 is arranged between each second rotating part 11 and the corresponding rotating groove 12. The two ends of the second rotating member 13 are rotatably connected to the corresponding second rotating part 11 and the rotating groove 12, respectively. Figure 1-3 As shown, the rotational connection between the first rotating member 10, the first rotating part 9, and the support member 3 can be achieved by a rotating rod, and the rotational connection between the first rotating member 10 and the support member 3 is located at the end of the support member 3 away from the clamping part 6; the rotational connection between the second rotating member 13, the rotating groove 12, and the second rotating part 11 can be achieved by a rotating rod, and the rotating groove 12 is located on the side of the support member 3 near the sleeve 1 and the end near the clamping part 6, so that the sleeve 1, the first mounting ring 7, the first rotating member 10, the support member 3, the second rotating member 13, and the second mounting ring 8 form a linkage. When the position of the second mounting ring 8 relative to the first mounting ring 7 is changed, the angle of the linked support member 3 is also changed, thereby adjusting the angle of the corresponding support member 3, so that the clamping part 6 of the support member 3 can clamp the protruding part of the mounting surface.

[0036] In some embodiments, a pair of limiting rings 14 are provided at one end of the sleeve 1 near the support member 3, and the first mounting ring 7 is disposed between the pair of limiting rings 14. For example... Figure 1-3 As shown, the first mounting ring 7 is fitted onto the sleeve 1 between a pair of limiting rings 14. The first mounting ring 7 is rotatably connected relative to the sleeve 1 and the pair of limiting rings 14, thereby fixing the position of the first mounting ring 7 on the sleeve 1. The support member 3 can be adjusted simply by adjusting the position of the second mounting ring 8 relative to the second mounting ring 8 through the sleeve 1.

[0037] In some embodiments, a third threaded ring is provided on the outside of the sleeve 1, and a fourth threaded ring is provided on the inside of the second mounting ring 8. The sleeve 1 and the second mounting ring 8 are screwed together by the third threaded ring and the fourth threaded ring. Figure 1-3 As shown, the sleeve 1 and the second mounting ring 8 are screwed together by the third threaded ring and the fourth threaded ring. When the adjusting sleeve 1 rotates relative to the positioning rod 2, the sleeve 1 rotates relative to the second mounting ring 8, thereby adjusting the position of the second mounting ring 8 on the sleeve 1.

[0038] In some embodiments, a second operating ring 15 is provided at the end of the sleeve 1 away from the support member 3, and a plurality of toothed grooves 16 are evenly provided on the outer sides of the first operating ring 5 and the second operating ring 15, respectively. Figure 1-3As shown, the sleeve 1 rotates relative to the positioning rod 2 through the second operating ring 15, and the toothed groove 16 on the outer side of the first operating ring 5 and the second operating ring 15 facilitates gripping.

[0039] In some embodiments, the measuring mechanism is a laser rangefinder 17, which is positioned at the center of the first operating ring 5 on the side furthest from the positioning rod 2. For example... Figure 1-3 As shown, the laser rangefinder 17 is commercially available. Installed on the secondary lining trolley or other reference position, the laser rangefinder 17 emits a laser beam towards the working face. The laser beam is reflected back after encountering the working face and received by the laser rangefinder 17. Based on the round-trip time of the laser beam and the speed of light, the laser rangefinder 17 accurately calculates the distance between the secondary lining trolley and the working face. For example, if the round-trip time of the laser beam is t and the speed of light is c, then the distance from the secondary lining trolley to the working face is d = c × t / 2, and this is used for measurement.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A device for measuring the safe step distance at a working face, characterized in that, include: casing, A positioning rod is disposed inside the sleeve, and the positioning rod and the sleeve are movably connected; Support members are evenly arranged in at least three around the sleeve, and the support members are movably disposed at one end of the sleeve; An adjustment mechanism is provided between the support member and the sleeve to adjust the angle of the support member relative to the sleeve. A measuring mechanism is located at the other end of the sleeve to measure the safety step distance.

2. The face safety step distance measuring device according to claim 1, characterized in that: The positioning rod is provided with a first threaded ring on its outside, and the sleeve is provided with a second threaded ring inside. The positioning rod and the sleeve are screwed together by the first threaded ring and the second threaded ring.

3. The face safety step distance measuring device according to claim 1, characterized in that: The positioning rod has a sharp end near the support member, and a first operating ring is provided at the other end of the positioning rod.

4. The face safety step distance measuring device according to claim 3, characterized in that: One end of the support member is provided with a clamping part, which extends toward the positioning rod.

5. The face safety step distance measuring device according to claim 3, characterized in that: The adjustment mechanism includes a first mounting ring and a second mounting ring. The first mounting ring is disposed at one end of the sleeve near the support member, and the first mounting ring and the sleeve are rotatably connected. The second mounting ring is located near the first mounting ring and is movably connected to the sleeve. The second mounting ring has three first rotating parts evenly arranged around the center of the sleeve, which correspond to the support member. Each first rotating part and the corresponding support member are respectively provided with a first rotating member. The two ends of the first rotating member are rotatably connected to the corresponding first rotating part and the support member. The first mounting ring has three second rotating parts evenly arranged around the sleeve, corresponding to the support member. Each support member has a rotating groove near the second rotating part. A second rotating member is arranged between each second rotating part and the corresponding rotating groove. The two ends of the second rotating member are rotatably connected to the corresponding second rotating part and the rotating groove, respectively.

6. The face safety step distance measuring device according to claim 5, characterized in that: A pair of limiting rings are provided at one end of the sleeve near the support member, and the first mounting ring is disposed between the pair of limiting rings.

7. The face safety step distance measuring device according to claim 5, characterized in that: The sleeve is provided with a third threaded ring on the outside, and the second mounting ring is provided with a fourth threaded ring on the inside. The sleeve and the second mounting ring are screwed together by the third threaded ring and the fourth threaded ring.

8. The face safety step distance measuring device according to claim 5, characterized in that: The end of the sleeve away from the support is provided with a second operating ring, and the outer sides of the first operating ring and the second operating ring are each provided with a plurality of toothed grooves.

9. The face safety step distance measuring device according to claim 3, characterized in that: The measuring mechanism is a laser rangefinder, which is located at the center of the first operating ring on the side away from the positioning rod.

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