A device for measuring the convergence of the roof and floor of a coal mine tunnel
By designing a stable top component and a detachable extension component, the problem of swaying interference in the measurement of the approach distance of the roof and floor of coal mine roadways was solved, resulting in more accurate and practical measurement results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI SANWEI MINE SAFETY EQUIP CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-21
AI Technical Summary
Existing coal mine roadway roof and floor approach measurement devices are easily affected by the shaking of the measurement personnel, resulting in inaccurate measurement results and large data errors.
A device comprising a top component, an adjustment component, a display component, and an extension component is designed. The threaded rod and spring structure of the adjustment component ensure stable contact of the top component, and the detachable design of the extension component ensures the stability and accuracy of the measurement.
It improves the accuracy of measurement results, avoids errors caused by shaking, and the detachable nature of the extension components enhances the practicality and durability of the device.
Smart Images
Figure CN224534949U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal mine measuring devices, specifically relating to a device for measuring the proximity of the roof and floor plates in coal mine roadways. Background Technology
[0002] The roof and floor convergence refers to the total relative displacement of the roof and floor in the vertical direction after the excavation of a coal mine roadway, including the roof subsidence and floor bulge. It is a key indicator of roof stability and the adaptability of hydraulic supports. To measure the roof and floor convergence, Chinese utility model patent "CN218469717U" discloses a device for measuring the roof and floor convergence of a coal mine roadway.
[0003] The above-mentioned technical solution uses manual measurement, which requires ensuring that the lower part is stably stepped on. When moving the relatively soft measuring tape to the top of the coal mine roadway, the tape material is soft and easily affected by the shake of the person measuring, resulting in inaccurate measurement results. Moreover, the displacement of the roof of the coal mine roadway is relatively small, so the data error range is small. Even a small error in the measurement result can easily lead to misjudgment by the inspector. Therefore, there is an urgent need for a device for measuring the proximity of the roof and floor of the coal mine roadway to solve the problem of being easily interfered with by the shake of the person measuring. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art, which is easily affected by the shaking of the measuring personnel during measurement, resulting in inaccurate measurement results, and thus realize a device for measuring the proximity of the roof and floor of coal mine roadways.
[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is: a device for measuring the proximity of the top and bottom plates of a coal mine roadway, comprising a top component, an adjustment component for adjusting the height of the top component, and a display component for visualizing the relative movement between the top component and the adjustment component, wherein an extension component is installed at the bottom of the display component to cooperate with the top component to abut against the upper and lower parts of the coal mine roadway.
[0006] In the aforementioned measuring device for the proximity of the top and bottom plates of a coal mine roadway, the top component includes a ring that contacts the top of the coal mine roadway. A top connector is fixedly connected to the lower part of the ring. A groove is provided on one end of the top connector near the ring for the top cone to slide. The top cone and the groove on the top connector are connected by a spring.
[0007] In the aforementioned measuring device for the approach of the roof and floor plates in coal mine roadways, the adjusting assembly includes an adjusting rod that is threadedly connected to the bottom of the top connector. A sleeve is fixedly connected to the bottom of the adjusting rod, and a threaded rod is threadedly connected inside the sleeve. The bottom of the threaded rod is fixed inside the outer sleeve.
[0008] In the aforementioned device for measuring the proximity of the roof and floor of a coal mine roadway, a number of limiting grooves are provided on the side wall of the adjusting rod, and a guide sleeve is fitted on the side wall of the adjusting rod. The adjusting rod slides along the inner cavity of the guide sleeve, and a number of limiting components that slide inside the corresponding limiting grooves are fixedly installed on the top of the guide sleeve.
[0009] In the aforementioned device for measuring the proximity of the roof and floor of a coal mine roadway, the display component includes teeth fixedly connected to the middle of the adjusting rod, a first driven gear meshing with the teeth, the first driven gear being fixedly sleeved on the middle of the rotating shaft, a rear housing being rotatably connected to one end of the rotating shaft, and a front housing being installed on the rear housing.
[0010] In the aforementioned device for measuring the proximity of the roof and floor of a coal mine roadway, an internal threaded ring is provided on the upper part of the rear housing, and the bottom of the guide sleeve is threadedly connected to the internal threaded ring to realize the detachability of the guide sleeve. A fixed handle glove is provided on the lower part of the rear housing, and the outer sleeve is fitted outside the fixed handle glove. The fixed handle glove is fitted outside the sleeve.
[0011] In the aforementioned measuring device for the proximity of the roof and floor of a coal mine roadway, a transmission gear is fixedly sleeved at the other end of the rotating shaft. The transmission gear meshes with a second driven gear, which is fixedly sleeved on a connecting shaft. The connecting shaft rotates through the rear housing. A pointer is fixedly sleeved on the portion of the connecting shaft that passes through the rear housing. A scale is provided on the outer surface of the front housing. By observing the position of the pointer on the scale, the distance between the top component and the adjusting component is determined.
[0012] In the aforementioned measuring device for the proximity of the roof and floor plates in coal mine roadways, a connecting disc is rotatably connected to the lower bottom surface of the outer sleeve, and an external threaded column is fixedly connected to the lower part of the connecting disc.
[0013] In the aforementioned device for measuring the proximity of the roof and floor of a coal mine roadway, the extension assembly includes an extension rod threadedly connected to the external threaded column, several foot pedals fixedly connected to the bottom side wall of the extension rod, and a bottom cone fixed to the bottom of the extension rod.
[0014] Compared with the prior art, the device for measuring the proximity of the roof and floor of coal mine roadways of this invention has at least the following beneficial effects: This utility model discloses a device for measuring the proximity of the roof and floor plates in coal mine roadways. By incorporating an outer sleeve in the adjusting assembly, the rotation of the outer sleeve drives the threaded rod to rotate, thereby causing the adjusting rod to move up and down. Ultimately, the top assembly moves to abut against the roof of the coal mine roadway, and the extension assembly abuts against the bottom of the roadway, thus measuring the proximity of the roof and floor plates. The abutting mechanism at both the top and bottom provides greater stability during measurement and is less affected by the shake of the person measuring, resulting in more accurate measurements. Furthermore, the extension assembly is detachable and can be installed on the top sleeve, allowing for selection of an appropriate length based on the specific measurement height, avoiding situations where the roadway is too high to measure, and enhancing the practicality of the measuring device.
[0015] This utility model discloses a measuring device for the proximity measurement of the roof and floor of a coal mine roadway. By setting the top cone and the spring in the top component, the measuring personnel can determine the distance between the annular component and the top of the roadway by observing the gradual increase in the movement assistance of the top cone. This facilitates the measuring personnel in determining whether the top of the measuring device is against the top of the coal mine roadway. Moreover, the top component is detachable from the adjusting rod, which makes it easy to replace the top component when it is in use, thus improving the durability of the measuring device. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the device for measuring the proximity of the roof and floor plates in coal mine roadways according to this utility model; Figure 2 This is a schematic diagram of the internal structure of the guide sleeve of the measuring device for the proximity of the roof and floor plates in coal mine roadways according to this utility model. Figure 3 This is a schematic diagram of the internal structure of the rear housing of the device for measuring the proximity of the roof and floor plates in coal mine roadways according to this utility model. Figure 4 This is a schematic diagram of the overall structure of the expansion assembly of the coal mine roadway roof and floor approach measurement device of this utility model; Figure 5 This utility model relates to a device for measuring the proximity of the roof and floor plates in coal mine roadways. Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 This utility model relates to a device for measuring the proximity of the roof and floor plates in coal mine roadways. Figure 2 Enlarged structural diagram at point B.
[0017] In the diagram: 1. Top assembly; 11. Ring component; 12. Top cone; 13. Spring; 14. Top connector; 2. Adjusting assembly; 21. Adjusting rod; 22. Guide sleeve; 23. Limiting component; 24. Limiting groove; 25. Sleeve component; 26. Outer sleeve; 27. Threaded rod; 3. Indicator display assembly; 31. Front housing; 32. Rear housing; 33. Pointer; 34. Rotating shaft; 35. First driven gear; 36. Transmission gear; 37. Connecting shaft; 38. Second driven gear; 39. Gear teeth; 4. Extension assembly; 41. Extension rod; 42. Foot pedal; 43. Base cone; 5. Connecting disc component; 6. External threaded post. Detailed Implementation
[0018] The following description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed account of the present invention's device for measuring the proximity of the roof and floor plates in coal mine roadways.
[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] This embodiment discloses a device for measuring the approach distance of the roof and floor plates in coal mine roadways. By incorporating an outer sleeve 26 in the adjusting assembly 2, the rotation of the outer sleeve 26 drives the threaded rod 27 to rotate, thereby causing the adjusting rod 21 to move up and down. Ultimately, the top assembly 1 moves to abut against the top of the coal mine roadway, and the extension assembly 4 abuts against the bottom of the coal mine roadway, thus measuring the approach distance of the roof and floor plates. The abutting mechanism at both the top and bottom provides greater stability during measurement and is less affected by the shake of the person measuring, resulting in more accurate measurement results. Furthermore, the extension assembly 4 is detachably mounted on the top assembly 2, allowing for selection of an appropriate length based on the specific measurement height, avoiding situations where the roadway is too high to measure, thus improving the practicality of the measuring device. (Refer to...) Figures 1-6 It mainly includes a top component 1, an adjustment component 2 for adjusting the height of the top component 1, and a display component 3 for visualizing the relative movement of the top component 1 and the adjustment component 2. An extension component 4 is installed at the bottom of the display component 3 to cooperate with the top component 1 to resist the upper and lower parts of the coal mine roadway.
[0021] like Figure 5It is known that the top component 1 includes a ring component 11 that contacts the top of the coal mine roadway. A top connector 14 is fixedly connected to the lower part of the ring component 11. A groove is provided at one end of the top connector 14 near the ring component 11 for the top cone 12 to slide. When the ring component 11 contacts the top of the coal mine roadway, the top cone 12 can move completely into the interior of the top cone 12. The top cone 12 and the groove on the top connector 14 are connected by a spring 13. When the user moves the top component 1 upward to contact the top of the coal mine roadway, the top cone 12 usually contacts the top of the roadway first. The top cone 12 moves along the groove and enters the groove. The user compresses the spring 13 through the top cone 12, and feels that the movement of the top cone 12 is more difficult, thus confirming that the top cone 12 has contacted the top of the roadway. This allows the user to better confirm the position of the top component 1 at the top of the measuring device and reduces the difficulty of measuring the proximity of the top and bottom plates of the coal mine roadway.
[0022] like Figures 5-6 It is known that the adjustment component 2 includes an adjustment rod 21 that is threadedly connected to the bottom of the top connector 14. A sleeve 25 is fixedly connected to the bottom of the adjustment rod 21. A threaded rod 27 is threadedly connected inside the sleeve 25. The bottom of the threaded rod 27 is fixed inside the outer sleeve 26. The rotation of the outer sleeve 26 drives the sleeve 25 to move up and down, thereby realizing the up and down movement of the top component 1.
[0023] like Figure 5 It is known that a plurality of limiting grooves 24 are provided on the side wall of the adjusting rod 21, and a guide sleeve 22 is sleeved on the side wall of the adjusting rod 21. The adjusting rod 21 slides along the inner cavity of the guide sleeve 22. A plurality of limiting members 23 that slide inside the corresponding limiting grooves 24 are fixedly installed on the top of the guide sleeve 22 to restrict the adjusting rod 21 to slide only inside the guide sleeve 22.
[0024] like Figure 3 It is known that the display component 3 includes a tooth 39 fixedly connected to the middle part of the adjustment rod 21, a first driven gear 35 meshing with the tooth 39, the first driven gear 35 being fixedly sleeved on the middle part of the rotating shaft 34, one end of the rotating shaft 34 being rotatably connected to the rear housing 32, and the front housing 31 being installed on the rear housing 32; like Figure 3 and Figure 6 It is known that the upper part of the rear housing 32 is provided with an internal threaded ring, and the bottom of the guide sleeve 22 is threadedly connected to the internal threaded ring to realize the detachability of the guide sleeve 22. The lower part of the rear housing 32 is provided with a fixed handle glove, the outer sleeve 26 is sleeved on the outside of the fixed handle glove, and the fixed handle glove is sleeved on the outside of the sleeve 25. The other end of the rotating shaft 34 is fixedly sleeved with a transmission gear 36, and the transmission gear 36 meshes with a second driven gear 38. The second driven gear 38 is fixedly sleeved on the connecting shaft 37. The connecting shaft 37 rotatably passes through the rear housing 32. The part of the connecting shaft 37 that passes through the rear housing 32 is fixedly sleeved with a pointer 33. The outer surface of the front housing 31 is provided with a scale. By observing the position of the pointer 33 on the scale, the distance of the top component 1 relative to the adjusting component 2 is determined. Specifically, the distance of the upper surface of the ring 11 relative to the bottom surface of the outer sleeve 26 is determined.
[0025] like Figure 6 It can be seen that the lower bottom surface of the outer sleeve 26 is rotatably connected to a connecting disc 5, and the lower part of the connecting disc 5 is fixedly connected to an external threaded post 6.
[0026] The extension component 4 includes an extension rod 41 threadedly connected to the external threaded post 6, several foot pedals 42 fixedly connected to the bottom side wall of the extension rod 41 for measurement personnel to step on for measurement, facilitating the measurement personnel to limit the position of the measuring device, and a bottom cone 43 fixed to the bottom of the extension rod 41. The bottom cone 43 is relatively sharp. When using the measuring device, the bottom cone 43 is first inserted into the bottom of the coal mine roadway. Then, the measurement personnel limit the position of the extension rod 41 by stepping on the foot pedals 42, thus finally completing the restriction of the lower part of the measuring device.
[0027] When measuring the approach distance of the roof and floor plates in a coal mine roadway, due to the certain height of the roadway, the measuring personnel cannot determine whether the measuring device is touching the top of the roadway. If a large force is used when the device is close to the top, it can easily damage the top of the measuring device. Therefore, by setting the top cone 12 and the spring 13 in the top component 1, the measuring personnel can determine the distance between the ring 11 and the top of the roadway by observing the gradual increase in the resistance of the top cone 12. This makes it easier for the measuring personnel to determine whether the top of the measuring device is touching the top of the roadway. Moreover, the top component 1 is detachable from the adjusting rod 21, which facilitates the replacement of the top component 1 when it is in use, thus improving the durability of the measuring device.
[0028] To determine the exact distance between the top and bottom plates of a coal mine roadway, the circular ring 11 is pressed against the top of the roadway, and the foot pedal 42 is pressed against the bottom of the roadway. The distance between the top and bottom plates of the coal mine roadway and the bottom can be determined by the scale reading on the front housing 31, the length of the extension rod 41, and the length of the connecting disc 5. The distance between the top and bottom plates of the coal mine roadway and the bottom plate can be obtained by measuring again after a period of time.
[0029] The working principle of this utility model for measuring the proximity of the roof and floor plates in coal mine roadways: When it is necessary to measure the distance between the roof and the bottom of a coal mine roadway; First, one hand holds the fixed handle and the other hand moves the outer sleeve 26. The movement of the outer sleeve 26 moves the connecting disc 5, which in turn moves the external threaded post 6. The movement of the external threaded post 6 moves the extension rod 41, which in turn moves the bottom cone 43 to insert into the bottom of the tunnel. Meanwhile, the surveyor steps on the foot pedal 42 with both feet.
[0030] Secondly, the outer sleeve 26 is rotated by an external force. The rotation of the outer sleeve 26 causes the threaded rod 27 to rotate. The rotation of the threaded rod 27 causes the sleeve 25 to move. The movement of the sleeve 25 causes the adjusting rod 21 to move. The movement of the adjusting rod 21 causes the top connecting piece 14 to move. The movement of the top connecting piece 14 causes the ring piece 11 to move and press against the roof of the coal mine roadway. During this period, the movement of the top connector 14 causes the spring 13 inside the upper groove of the top connector 14 to move. The movement of the spring 13 causes the top cone 12 to press against the top plate of the coal mine roadway, and causes the top cone 12 to move relative to the top connector 14 to compress the spring 13.
[0031] At the same time, the rotation of the adjusting rod 21 drives the teeth 39 to move, the movement of the teeth 39 drives the first driven gear 35 to rotate, the rotation of the first driven gear 35 drives the rotating shaft 34 to rotate, the rotation of the rotating shaft 34 drives the transmission gear 36 to rotate, the rotation of the transmission gear 36 drives the second driven gear 38 to rotate, the rotation of the second driven gear 38 drives the connecting shaft 37 to rotate, and the rotation of the connecting shaft 37 drives the pointer 33 to rotate.
[0032] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of this invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.
[0033] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
[0034] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.
Claims
1. A device for measuring the proximity of the roof and floor plates in coal mine roadways, characterized in that, include: The top component (1) is provided with an adjustment component (2) for adjusting the height of the top component (1) and a display component (3) for visualizing the relative movement of the top component (1) and the adjustment component (2). The display component (3) is provided with an extension component (4) for cooperating with the top component (1) to resist the upper and lower parts of the coal mine roadway.
2. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 1, characterized in that: The top component (1) includes a ring (11) that contacts the top of the coal mine roadway. A top connector (14) is fixedly connected to the lower part of the ring (11). A groove is provided on one end of the top connector (14) near the ring (11) for the top cone (12) to slide. The top cone (12) and the groove on the top connector (14) are connected by a spring (13).
3. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 2, characterized in that: The adjustment assembly (2) includes an adjustment rod (21) that is threaded to the bottom of the top connector (14). A sleeve (25) is fixedly connected to the bottom of the adjustment rod (21). A threaded rod (27) is threaded inside the sleeve (25). The bottom of the threaded rod (27) is fixed inside the outer sleeve (26).
4. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 3, characterized in that: The adjusting rod (21) has several limiting grooves (24) on its side wall, and a guide sleeve (22) is fitted on the side wall of the adjusting rod (21). The adjusting rod (21) slides along the inner cavity of the guide sleeve (22), and several limiting members (23) that slide inside the corresponding limiting grooves (24) are fixedly installed on the top of the guide sleeve (22).
5. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 4, characterized in that: The display assembly (3) includes a tooth (39) fixedly connected to the middle of the adjusting rod (21), a first driven gear (35) meshing with the tooth (39), the first driven gear (35) being fixedly sleeved on the middle of the rotating shaft (34), one end of the rotating shaft (34) being rotatably connected to the rear housing (32), and the front housing (31) being installed on the rear housing (32).
6. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 5, characterized in that: The upper part of the rear housing (32) is provided with an internal threaded ring, and the bottom of the guide sleeve (22) is threadedly connected to the internal threaded ring to realize the detachability of the guide sleeve (22). The lower part of the rear housing (32) is provided with a fixed handle glove, and the outer sleeve (26) is sleeved on the outside of the fixed handle glove. The fixed handle glove is sleeved on the outside of the sleeve (25).
7. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 5, characterized in that: The other end of the rotating shaft (34) is fixedly sleeved with a transmission gear (36), and the transmission gear (36) is meshed with a second driven gear (38). The second driven gear (38) is fixedly sleeved on the connecting shaft (37). The connecting shaft (37) rotates through the rear housing (32). The part of the connecting shaft (37) that passes through the rear housing (32) is fixedly sleeved with a pointer (33). The outer surface of the front housing (31) is provided with a scale. By observing the position of the pointer (33) on the scale, the distance of the top component (1) relative to the adjustment component (2) can be determined.
8. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 3, characterized in that: The bottom surface of the outer sleeve (26) is rotatably connected to a connecting disc (5), and the lower part of the connecting disc (5) is fixedly connected to an external threaded column (6).
9. The device for measuring the proximity of roof and floor plates in coal mine roadways according to claim 8, characterized in that: The extension assembly (4) includes an extension rod (41) threadedly connected to the external threaded post (6), a plurality of pedals (42) fixedly connected to the bottom side wall of the extension rod (41), and a bottom cone (43) fixed to the bottom of the extension rod (41).