Protection support for circumferential communication cable in main shaft
By designing a curved ring communication cable protection bracket made of C-shaped steel, combined with the fixing method of outer buffer belt and hanging ears, the problem of easy breakage of cables in the wellbore is solved, ensuring the normal progress of well wall deformation monitoring and Cable safety.
Patent Information
- Application Number
- CN202420981509.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2024-12-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The circular communication cables in the wellbore are often broken due to the high-speed operation of coal and skip, resulting in the failure of the deformation monitoring work of the well wall and the lack of effective protection measures.
A ring communication cable protection bracket was designed, and a curved bracket body made of C-shaped steel is equipped with an outer buffer belt and hanging ears. It is fixed to the well wall by expansion screws, and the cable is tied with cable ties or wires to ensure that Cable fixation and protection.
Effectively prevent the cable from being broken by coal and gangue, ensure the normal progress of the wellbore deformation monitoring work, and the structure is simple, compact, anti-corrosion, and easy to install.
Smart Images
Figure CN222234362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cable protection mechanisms in wellbores. Background Art
[0002] At present, a large number of vertical shaft rupture accidents have occurred in deep topsoil in some areas since the end of the 1980s. The damage mechanism is that the continuous water loss and consolidation of the strata around the shaft drive the shaft wall to continue to compress until it breaks. In order to effectively grasp the deformation development law of the shaft wall, the method of installing shaft wall concrete strain gauges is often used. In order to avoid the adverse effects of uneven deformation of large-diameter shafts on the test, a group of concrete strain gauges are often buried in each of the four quadrants around the shaft for monitoring. The data acquisition terminal or bus can usually only be located near a cable tray at a certain point in the shaft. Therefore, the sensors at four different quadrants need to be connected to the data acquisition terminal or bus through a ring cable to ensure the normal monitoring work.
[0003] However, due to the impact of coal and gangue falling in the main shaft and the high-speed operation of the skip, the sensor ring cable is often broken by coal (gangue) blocks or the skip hook, resulting in monitoring failure. As a result, how to effectively protect the ring communication cable in the main shaft has become a technical problem that needs to be solved urgently by technicians in this field. Utility Model Content
[0004] In view of the above problems, the utility model proposes an annular communication cable protection bracket in the main well shaft, which is suitable for the annular protection and fixation of the communication cable of the well wall deformation monitoring component in the main well shaft, thereby realizing the rapid installation and safe anti-smashing protection of the sensor.
[0005] The technical solution of the utility model is as follows: the protective bracket comprises a bracket body 4, a bracket hanging ear 5 fixedly connected to the bracket body 4, and an outer buffer belt 7 covering the bracket body 4, the bracket body 4 is in an arc shape that matches the inner wall of the wellbore as a whole, and the cross section of the bracket body 4 is C-shaped, and a plurality of elliptical back holes are opened on the bracket body 4;
[0006] The bracket hanging ear 5 is divided into an upper hanging ear and a lower hanging ear, and the upper hanging ear and the lower hanging ear are respectively fixedly connected to the top surface and the bottom surface of the bracket body 4, and the upper hanging ear and the lower hanging ear are provided with round holes for accommodating the expansion screws 6. The outer buffer belt 7 covers the C-shaped opening of the bracket body 4, and the upper part of the outer buffer belt 7 is also provided with through holes for accommodating the expansion screws 6, and the through holes correspond one by one to the round holes on the upper hanging ears.
[0007] Furthermore, the annular communication cable is laid in the C-shaped groove of the bracket body 4 and is tied and fixed by a tie or wire passing through the elliptical back hole.
[0008] Furthermore, the number of the upper hanging ears is greater than the number of the lower hanging ears.
[0009] Furthermore, the bracket body 4 is a C-shaped steel with an elliptical back hole.
[0010] Furthermore, the expansion screw 6 located above the bracket body 4 passes through the circular hole on the upper hanging ear and the through hole on the outer buffer belt 7 at the same time, and is fixed on the well wall 1; the lower part of the outer buffer belt 7 naturally droops.
[0011] The protective bracket proposed in the utility model has many advantages such as simple, compact, firm and corrosion-resistant structure, and is easy to obtain materials and install. Through the installation of the "soft outside and hard inside" protective bracket, the sensor annular cable can be prevented from being broken by falling coal and gangue, ensuring the normal progress of the wellbore deformation monitoring work. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is the floor plan of this case.
[0013] Figure 2 This is the plan view of this case.
[0014] Figure 3 yes Figure 2 AA section view;
[0015] In the figure, 1-well wall; 2-data acquisition terminal or bus; 3-sensor; 4-bracket body; 5-bracket hanging ear; 6-expansion screw; 7-outer buffer belt; 8-sensor cable; 9-cable tie. DETAILED DESCRIPTION
[0016] In order to clearly illustrate the technical features of this patent, this patent is elaborated in detail below through a specific implementation method and in combination with its accompanying drawings.
[0017] like Figure 1-3As shown, the protection bracket is formed by bending C-shaped steel according to the inner diameter of the wellbore, wherein the C-shaped steel has an elliptical back hole, which reduces the total weight of the protection bracket and is also conducive to the subsequent fixing of the circumferential cable with a tie or wire. Its C-shaped opening faces outward, which is convenient for the laying of the circumferential cable and for subsequent maintenance and replacement. The upper hanging ear is fixed by welding at intervals of about 1m. The hanging ear has a round hole so that the bracket can be fixed to the inner side of the well wall with an expansion screw. The lower hanging ear can be appropriately sparsely arranged. Its main function is to further strengthen the bracket, which is also fixed by the expansion screw. A layer of buffer belt is also designed on the outermost side of the bracket. The upper end of the belt has a through hole with the same spacing as the upper hanging ear. It is fixed to the well wall together with the upper hanging ear by an expansion screw (with a protective gasket), and the lower end naturally hangs without fixing. The width of the belt should ensure that the bracket can be wrapped and protected as a whole. The sensor circumferential cable is laid in the C-shaped steel groove and tied and fixed by a tie or wire passing through the back hole of the C-shaped steel. In this way, the annular cable protection bracket with an outer belt and inner steel ("soft outside and hard inside") ensures a certain strength resistance to the falling coal and gangue from above, and can also flexibly buffer the high-speed impact of the falling blocks. The neat wall-mounted installation ensures that the annular cable is not restricted, and there is no risk of being hooked off by the skip, thereby ensuring the normal implementation of the well wall deformation monitoring work.
[0018] According to the inner diameter of the well wall 1 and the buried position of the sensor 3, the annular cable bracket is divided into two lengths of L1 and L2. L1 fixes the annular cable of the deformation monitoring point sensors at the near end and the far end, while L2 only fixes the annular cable of the deformation monitoring point sensor at the far end.
[0019] According to the divided length, the C-shaped steel is cut and bent into an arc consistent with the inner diameter of the shaft, and the upper and lower hanging ears are welded according to the designed size. In order to ensure that the protection bracket is as unlikely to be hit by falling coal and gangue as possible, the C-shaped steel specifications should be small enough on the premise that the internal can wrap the annular cable, such as 41×21mm. Furthermore, considering the need for rust prevention in the shaft, stainless steel C-shaped steel can be selected for processing.
[0020] When installing:
[0021] First, fix the L2 section bracket, and fix the bracket body 4 and the outer buffer belt 7 made of C-shaped steel to the well wall 1 by means of upper hanging ears and expansion screws 6. Then, lay and fix the annular cable 8 inside the C-shaped steel with binding wire or binding tie 9, and straighten the annular cable 8 from the distal end to the proximal end.
[0022] Then fix the L1 section bracket, and similarly fix the bracket body 4 and the outer buffer belt 7 to the well wall 1 by means of upper hanging ears and expansion screws 6, and then lay and fix the annular cable 8 of the two deformation monitoring points at the far end and the near end inside the C-shaped steel using tie wires or tie ties 9. Finally, straighten the annular cable 8 from the near end section to the data acquisition terminal or bus section 2.
[0023] Similarly, fix the two bracket sections on the opposite side in sequence to complete the fixation and protection of all the circular cables.
[0024] There are many specific implementation ways of the utility model. The above is only the preferred implementation mode of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the utility model, and these improvements should also be regarded as the protection scope of the utility model.
Claims
1. A protective bracket for annular communication cables in a main well, characterized in that: The protective support comprises a support body (4), a support lug (5) fixedly connected to the support body (4), and an outer buffer belt (7) covering the support body (4); the support body (4) is in an arc shape that matches the inner wall of the wellbore as a whole, and the cross section of the support body (4) is in a C shape; a plurality of elliptical back holes are opened on the support body (4); The bracket hanging ear (5) is divided into an upper hanging ear and a lower hanging ear, and the upper hanging ear and the lower hanging ear are respectively fixedly connected to the top surface and the bottom surface of the bracket body (4), and the upper hanging ear and the lower hanging ear are both provided with round holes for accommodating expansion screws (6). The outer buffer belt (7) covers the C-shaped opening of the bracket body (4), and the upper part of the outer buffer belt (7) is also provided with through holes for accommodating expansion screws (6), and the through holes correspond one to one with the round holes on the upper hanging ear.
2. The annular communication cable protection bracket in the main well according to claim 1 is characterized in that: The annular communication cable is laid in the C-shaped groove of the bracket body (4) and is tied and fixed by a tie or wire passing through the elliptical back hole.
3. The annular communication cable protection bracket in the main well according to claim 1 is characterized in that: The number of the upper hanging ears is greater than the number of the lower hanging ears.
4. The annular communication cable protection bracket in the main well according to claim 1 is characterized in that: The support body (4) is a C-shaped steel having an elliptical back hole.
5. The annular communication cable protection bracket in the main well according to claim 1 is characterized in that: The expansion screw (6) located above the bracket body (4) passes through the circular hole on the upper hanging ear and the through hole on the outer buffer belt (7) at the same time, and is fixed on the well wall (1); the lower part of the outer buffer belt (7) droops naturally.