A stay crack meter protection device

Abstract

The utility model relates to a kind of wire crack meter protection devices.The conventional crack meter protection device lacks the protection of crack meter main body, and the installation of steel cable is inconvenient and easy to affect steel cable.The utility model includes crack meter body protection bin, telescopic wire protection pipe, butt joint and multiple vertical supports;Crack meter body protection bin is set in crack one end, and crack meter body protection bin side is provided with steel cable outlet, and crack meter is set in crack meter body protection bin;Butt joint is set in crack other end, and butt joint side is provided with steel cable inlet, and steel cable fixing hook buckle is set in the inside of butt joint;Telescopic wire protection pipe one end is connected with steel cable outlet, and the other end is connected with steel cable inlet, and crack meter steel cable is through steel cable outlet and is set on steel cable fixing hook buckle by penetrating the inside of telescopic wire protection pipe;Vertical support is spaced apart and set in the bottom of telescopic wire protection pipe.The utility model can protect crack meter main body, and the installation of steel cable is convenient and not easy to affect steel cable.

Description

Technical Field

[0001] This utility model relates to the field of geological disaster monitoring technology, specifically to a wire-guided crack gauge protection device. Background Technology

[0002] With the rapid development of industries such as water conservancy, transportation, and construction, the proportion of engineering facilities such as high-speed railways and dams built in complex geographical environments is increasing year by year. However, with the deterioration of the ecological environment and extreme weather, cracks are caused in the surrounding mountains, soil, and even the facilities themselves. Using a string-type crack gauge to monitor various surface cracks and obtain the cumulative change in crack width and the rate of change is an important means of judging the safety of the engineering facilities themselves and the stability of the surrounding mountains and soil.

[0003] The pull-wire crack gauge mainly consists of two parts: the gauge body and the steel cable. The gauge body is fixed to one side of the crack, and the steel cable extends from the body, with its movable end fixed to the other side of the crack. As the crack width changes, the steel cable drives the internal wheel of the device to move, converting the mechanical displacement into a measurable electrical signal to measure the displacement distance and thus obtain the real-time width of the crack. However, during its use, if the measuring cable is exposed to the field environment for a long time, external factors such as wind and falling rocks will cause the cable to sway, resulting in abnormal monitoring data. Furthermore, long-term rain and snow erosion may cause the steel cable to break or the equipment to be damaged, resulting in missing monitoring data. The traditional solution is to use PVC pipes or other lightweight pipes to directly cover the crack gauge cable in the field to reduce the erosion of the cable by rain and snow. However, this solution has the following shortcomings: 1. The main body of the crack gauge lacks protection, and rain and snow erosion and rockfalls may damage the equipment.

[0004] 2. The PVC pipe has a fixed length. When the crack width increases, the pipe has detached from the steel cable. This not only weakens the anti-corrosion function, but also causes the steel cable to bend because it bears the weight of the pipe, which may lead to abnormal monitoring data.

[0005] 3. When using a wire-type crack gauge, the steel cable must be kept horizontal in order to obtain stable monitoring data. In traditional protection schemes, the hardness of PVC pipes limits the installation of the steel cable, making it inconvenient.

[0006] Therefore, there is an urgent need for a wire-guided crack gauge protection device that can protect the main body of the crack gauge equipment, facilitate the installation of the steel cable, and does not affect the steel cable. Summary of the Invention

[0007] The purpose of this utility model is to provide a protective device for a wire crack gauge, so as to at least solve the problems of traditional protective devices lacking protection for the main body of the crack gauge equipment, inconvenient installation of steel cables, and impact on steel cables.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A protective device for a pull-wire crack gauge includes a protective chamber for the crack gauge body, a retractable pull-wire protective tube, a connector, and multiple vertical supports. The crack gauge body protection chamber is located at one end of the crack, and a steel cable outlet is provided on the side of the crack gauge body protection chamber. The crack gauge is installed inside the crack gauge body protection chamber. The connector is located at the other end of the crack, and a steel cable inlet is provided on the side of the connector. A steel cable fixing hook is provided inside the connector. One end of the retractable guy wire protection tube is connected to the steel cable outlet, and the other end is connected to the steel cable inlet. The steel cable of the crack gauge passes through the steel cable outlet and enters the interior of the retractable guy wire protection tube, and is set on the steel cable fixing hook. The vertical supports are spaced apart at the bottom of the retractable pull-wire protection tube.

[0009] Furthermore, the crack gauge body protective chamber is generally rectangular, including a base and a protective shell. The protective shell is disposed on one side of the base and fits into the base.

[0010] Furthermore, the base includes a base plate and an adjustable support plate. The base plate is L-shaped and includes a bottom and a side. The steel cable outlet is located on the side. The adjustable support plate is located above the bottom via multiple threaded posts. The edges of the bottom that are not connected to the side are respectively provided with base connecting plates extending outward. The base connecting plates are respectively provided with multiple base fixing holes.

[0011] Furthermore, the protective shell is rectangular, with an open bottom and one open side. The bottom edges of the other three sides are respectively provided with shell connecting plates extending vertically outward, and the shell connecting plates are respectively provided with multiple shell connecting holes.

[0012] Furthermore, the connector includes a cover and a mating shell, the cover being disposed on one side of the mating shell and fitting into the mating shell.

[0013] Furthermore, the docking shell has a hexahedral structure, with one side being an opening. The steel cable fixing hook is located on the inner wall of the side wall opposite to the opening side. The edge of the side wall with the steel cable fixing hook extends outward to provide docking shell connecting plates. The docking shell connecting plates are provided with multiple mounting holes. The outer periphery of the opening side is provided with several sealing and fixing holes. The bottom of the docking shell is provided with a connecting nut.

[0014] Furthermore, the cover has a hexahedral structure, with one side being an opening. The steel cable inlet is located on the side wall opposite to the opening side, and several cover connection holes are respectively opened on the outer periphery of the opening side.

[0015] Furthermore, the retractable cable protection tube includes a fixed end protection tube, an accessory protection tube, and a movable end protection tube that are sequentially connected. The fixed end protection tube is connected to the cable outlet, the movable end protection tube is connected to the cable inlet, and a retaining strip is provided at the end of the movable end protection tube connected to the cable inlet.

[0016] Furthermore, the vertical support includes a supporting base plate, a vertical connecting rod, and a protective tube fixator. The supporting base plate is disposed on the ground, the vertical connecting rod is disposed on the supporting base plate, and the protective tube fixator is disposed on the vertical connecting rod.

[0017] Furthermore, the protective tube holder includes an upper fixing member and a lower fixing member. The lower fixing member is disposed at the top of the vertical connecting rod. One end of the upper fixing member is hinged to the lower fixing member, and the other end is connected to the lower fixing member by a snap fastener.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a protective device for a pull-wire crack gauge, which includes a crack gauge body protection chamber fixed to one side of the crack. The crack gauge body is installed inside the crack gauge body protection chamber to protect the crack gauge body. A steel cable is pulled out through the steel cable outlet, passes through a retractable pull-wire protection tube, and the movable end of the steel cable is fixed to the clamp of the movable end protection tube. By simultaneously stretching the movable end of the steel cable and the movable end protection tube to the other side of the crack to be monitored and fixing them to the connector, the steel cable is effectively protected and the installation of the steel cable is convenient. In addition, vertical supports are installed at intervals below the retractable pull-wire protection tube to limit the vertical displacement of the retractable pull-wire protection tube and ensure that the crack gauge steel cable is not subjected to vertical pressure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the protective chamber structure of the crack gauge body of this utility model; Figure 3This is a schematic diagram of the base structure of the protective chamber of the crack gauge body of this utility model; Figure 4 This is a schematic diagram of the protective outer shell structure of the crack gauge body protective chamber of this utility model; Figure 5 This is a schematic diagram of the retractable pull-cord protection tube structure of this utility model; Figure 6 This is a schematic diagram of the vertical support structure of this utility model; Figure 7 This is a schematic diagram of the butt joint structure of this utility model; Figure 8 This is a schematic diagram of the mating shell structure of the connector of this utility model; Figure 9 This is a schematic diagram of the sealing structure of the connector of this utility model; The diagram is labeled as follows: 1-Adjustable receiving plate, 2-Base fixing hole, 3-Cable outlet, 4-Threaded post, 5-Outer shell connection hole, 6-Fixed end protection tube, 7-Accessory protection tube, 8-Moving end protection tube, 9-Clamping strip, 10-Upper fixing component, 11-Lower fixing component, 12-Hinge, 13-Snap fastener, 14-Support base plate, 15-Connecting screw, 16-Connecting rod nut, 17-Connecting nut, 18-Cap fixing hole, 19-Mounting hole, 20-Cable fixing hook, 21-Cap connection hole, 22-Cable inlet. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "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.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Example: like Figure 1 As shown, this embodiment provides a protection device for a pull-wire crack gauge, including a crack gauge body protection chamber, a retractable pull-wire protection tube, a connector, and multiple vertical supports.

[0025] Specifically, the crack gauge body protection chamber is set at one end of the crack, and a steel cable outlet 3 is set on the side of the crack gauge body protection chamber. The crack gauge is set inside the crack gauge body protection chamber.

[0026] like Figures 2-4 As shown, the crack gauge body protection chamber is rectangular in shape, including a base and a protective shell. The protective shell is located on one side of the base and fits into the base. The base includes a bottom plate and an adjustable support plate 1.

[0027] In this embodiment, the base plate is L-shaped and made of steel plate. The base plate includes an integrally formed bottom and side. The steel cable outlet 3 is located on the side. A circular hole is opened at the center of the side, and a circular steel plate is welded and fixed to the outside of the hole. The channel formed serves as the steel cable outlet 3. Multiple connecting holes are spaced apart on the circular steel plate. The edges of the bottom unconnected side are welded with base connecting plates extending outward. Two base fixing holes 2 are opened on the base connecting plates respectively.

[0028] The adjustable support plate 1 has a porous structure to accommodate various crack gauges. The adjustable support plate 1 is set above the bottom via four threaded posts 4. The bottom of the threaded posts 4 is welded and fixed to the four corners of the top surface of the bottom of the base plate. The height of the adjustable support plate 1 can be adjusted by adjusting the position of the nuts on the threaded posts 4, thereby accommodating crack gauges of different sizes and allowing the pull cable to be pulled out from the center position of the cable outlet 3. The crack gauge is installed on the top surface of the adjustable support plate 1 and does not directly contact the base plate, which facilitates waterproofing and moisture protection.

[0029] The protective shell is rectangular, with an opening on its bottom and one side. The bottom edges of the other three sides extend vertically outward and are welded with shell connecting plates. Two shell connecting holes 5 are opened on the shell connecting plates, which correspond to the base fixing holes 2. The side of the base plate fits with the side opening of the protective shell, and the bottom of the base plate fits with the bottom surface of the protective shell. Expansion bolts are passed through the shell connecting holes 5 and the base fixing holes 2 in sequence to fix the base to the protective shell, forming a protective chamber for the crack gauge body. Sealing strips are installed at the contact points between the top surface and the left and right sides of the protective shell and the side of the base plate to facilitate waterproofing and moisture prevention.

[0030] In this embodiment, the joint is located at the other end of the crack, and a steel cable inlet 22 is provided on the side of the joint. A steel cable fixing hook 20 is provided inside the joint to facilitate fixing the pull cable.

[0031] Specifically, the connector includes a cover and a mating housing. The cover is located on one side of the mating housing and fits into it.

[0032] like Figures 7-9 As shown, the docking shell has a hexahedral structure with one side being an opening. The steel cable fixing hook 20 is welded and fixed to the middle of the inner wall of the side wall opposite to the opening side. The edge of the side wall with the steel cable fixing hook 20 extends outward and is welded with docking shell connecting plates. Two mounting holes 19 are opened on the docking shell connecting plates to facilitate the direct fixing of the docking joint to the stable rock mass or wall. The outer periphery of the opening side is provided with sealing fixing holes 18 spaced apart.

[0033] In this embodiment, a connecting nut 17 is welded and fixed at the bottom center of the docking shell. When there is no stable rock mass or wall, a fixed base plate is installed on the ground surface, and a screw is welded on the fixed base plate. The docking joint is fixed by the screw and the connecting nut 17.

[0034] The cover has a hexahedral structure with one side being an opening. The cable inlet 22 is located on the side wall opposite to the opening side. A circular hole is made at the center of the side wall, and a circular steel plate is welded and fixed to the outside of the opening. The channel formed serves as the cable inlet 22. Multiple connection holes are spaced apart on the circular steel plate. Several cover connection holes 21 are made on the outer periphery of the opening side. The cover connection holes 21 are corresponding to the cover fixing holes 18. The opening side of the cover is embedded inside the opening side of the docking shell, so that the cover connection holes 21 correspond to the cover fixing holes 18. The cover is fixed to the docking shell by bolts passing through the cover fixing holes 18 and the cover connection holes 21 in sequence, thus forming a joint.

[0035] In this embodiment, the retractable pull-wire protection tube is composed of multiple tubes arranged in sections. All tubes are made of plastic, which is lightweight and easy to operate. One end of the retractable pull-wire protection tube is connected to the steel cable outlet 3, and the other end is connected to the steel cable inlet 22. The steel cable of the crack gauge passes through the steel cable outlet 3 and runs through the interior of the retractable pull-wire protection tube, and is set on the steel cable fixing hook 20.

[0036] Specifically, such as Figure 5 As shown, the retractable cable protection tube includes a fixed-end protection tube 6, an accessory protection tube 7, and a movable-end protection tube 8, which are sequentially connected and retractable. The fixed-end protection tube 6 has multiple connecting holes spaced apart at its end away from the accessory protection tube 7. The end of the fixed-end protection tube 6 with the connecting holes is fitted inside the cable outlet 3, ensuring that the connecting holes at the cable outlet 3 correspond to the connecting holes of the fixed-end protection tube 6. Bolts are sequentially passed through the connecting holes of the fixed-end protection tube 6 and the connecting holes at the cable outlet 3, thereby connecting the fixed-end protection tube 6 to the cable outlet 3. The accessory protection tube 7 includes multiple retractable connecting tubes with progressively decreasing diameters. The sleeve is connected to the cable inlet 22. The end of the movable end protective tube 8 away from the accessory protective tube 7 has multiple connecting holes spaced apart. The end of the movable end protective tube 8 with connecting holes is sleeved inside the cable inlet 22, and the connecting holes at the cable inlet 22 correspond to the connecting holes of the movable end protective tube 8. The movable end protective tube 8 is connected to the cable inlet 22 by bolts passing through the connecting holes of the movable end protective tube 8 and the connecting holes at the cable inlet 22 in sequence. The diameter of the fixed end protective tube 6 is greater than the diameter of the sleeve with the maximum diameter of the accessory protective tube 7, and the diameter of the movable end protective tube 8 is less than the diameter of the sleeve with the minimum diameter of the accessory protective tube 7.

[0037] In this embodiment, a retaining strip 9 is provided at one end of the movable end protective tube 8 that connects to the steel cable inlet 22. The retaining strip 9 is a sturdy metal strip welded to the inside of the movable end protective tube 8 and placed horizontally in the middle of the open end of the movable end protective tube 8. The center of the metal strip is open on one side, which facilitates the fixing of the pull ring or hook lock of the telescopic end of the crack gauge steel cable to the retaining strip 9. This ensures that the crack gauge steel cable and the movable end protective tube 8 remain stable during use and prevents the crack gauge steel cable from detaching and being quickly retracted when the movable end protective tube 8 is extended, which could damage the equipment. By extending the movable end protective tube 8, the steel cable is pulled to the side of the connector, making the installation of the device more convenient. At the same time, the telescopic pull cable protective tube is composed of sections, which makes it easy to retract and carry during transportation.

[0038] In this embodiment, as the crack width increases, the length of the steel cable also increases. Since the fixed end protection tube 6 and the movable end protection tube 8 are fixed to both sides of the crack respectively, the length of the telescopic pull wire protection tube also increases by extending the accessory protection tube 7, thereby effectively protecting the steel cable.

[0039] In this embodiment, because the retractable guy wire protection tube is made of a lightweight material, a vertical support needs to be installed every 1 meter according to the length used to limit the longitudinal displacement of the retractable guy wire protection tube and ensure that the crack gauge steel cable is not subjected to vertical pressure. The vertical supports are spaced at the bottom of the retractable guy wire protection tube. The vertical support includes a support base plate 14, a vertical connecting rod and a protection tube fixator. The support base plate 14 is set on the ground, the vertical connecting rod is set on the support base plate 14, and the protection tube fixator is set on the vertical connecting rod.

[0040] Among them, such as Figure 6 As shown, the vertical connecting rod includes a connecting screw 15 and a connecting rod nut 16. The bottom of the connecting screw 15 is welded and fixed to the top surface of the support base plate 14, and the connecting rod nut 16 is sleeved on the connecting screw 15.

[0041] The protective tube holder is circular and includes an upper fixing part 10 and a lower fixing part 11. Both the upper fixing part 10 and the lower fixing part 11 are semi-circular. The bottom of the lower fixing part 11 is welded and fixed to the top of the connecting rod nut 16. One end of the upper fixing part 10 is hinged to the lower fixing part 11 via a hinge 12 for easy opening and closing. The other end is closed and connected to the lower fixing part 11 via a buckle 13. The buckle 13 is an existing metal fastener, including a movable upper end and a fixed lower end. The movable upper end is welded to the upper fixing part 10, and the fixed lower end is welded to the lower fixing part 11. By opening the buckle 13, the upper fixing part 10 is rotated open via the hinge 12, allowing the retractable pull-cord protective tube to be placed inside the protective tube holder. The upper fixing part 10 is then closed and fixed to the lower fixing part 11 via the buckle 13, thereby fixing the retractable pull-cord protective tube and limiting its vertical displacement.

[0042] In this embodiment, the connecting hole, the base fixing hole 2, the outer shell connecting hole 5, the mounting hole 19, the cover fixing hole 18, and the cover connecting hole 21 are all threaded holes.

[0043] The installation process in this embodiment is as follows: 1. First, install the crack gauge on the adjustable support plate 1, and adjust the height of the adjustable support plate 1 to ensure that the steel cable can be pulled out from the center position of the steel cable outlet 3.

[0044] 2. Select a stable rock mass on one side of the crack. If there is no stable rock mass, repair it manually with cement. Place the base of the crack meter body protection chamber in a suitable position on the rock mass or cement project. After connecting the protective shell with the base, use expansion bolts to pass through the shell connection hole 5 and the base fixing hole 2 in sequence to splice and fix the crack meter body protection chamber on the stable rock mass or cement project.

[0045] 3. Select a suitable location on the other side of the crack to install the connector. The cable inlet 22 of the connector should be axially horizontal with the cable outlet 3 of the crack gauge's protective chamber. If there is stable rock or wall on this side, the connector can be fixed directly through the mounting hole 19. If there is no stable rock or wall, a base plate should be installed on the ground with expansion bolts. A suitable length of threaded rod should be welded onto the base plate. The connector should be fixed by the threaded rod and the connecting nut 17, and the cable inlet 22 of the connector should be axially horizontal with the cable outlet 3 of the crack gauge's protective chamber.

[0046] 4. Pull out the crack gauge cable from the crack gauge body protection chamber, pass it through the retractable guy wire protection tube, fix the movable end of the cable to the clamp 9 to ensure that the movable end of the cable is relatively fixed with the movable end protection tube 8, and install the fixed end protection tube 6 of the retractable guy wire protection tube on the cable outlet 3.

[0047] 5. Smoothly pull the movable end protection tube 8 to the joint, install the movable end protection tube 8 on the steel cable inlet 22 of the joint cover, and after confirming that the movable end protection tube 8 is stably connected to the cover, remove the movable end of the steel cable from the clip 9 of the movable end protection tube 8, and fix the movable end of the steel cable to the steel cable fixing hook 20 of the joint. Then fix the cover of the joint to the docking shell.

[0048] 6. Fix the support base plate 14 in a suitable position, select a connecting screw 15 of appropriate length according to the site conditions, open the upper fixing part 10 through the hinge 12, place the retractable pull cable protection tube in the protection tube holder, then close the upper fixing part 10 and fasten the buckle 13 to ensure stability.

[0049] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A wire-stretcher crack protection device, characterized in that: It includes a crack gauge body protective chamber, a retractable guy wire protective tube, a connector, and multiple vertical supports; The crack gauge body protection chamber is located at one end of the crack, and a steel cable outlet (3) is provided on the side of the crack gauge body protection chamber. The crack gauge is installed inside the crack gauge body protection chamber. The connector is located at the other end of the crack, and a steel cable inlet (22) is provided on the side of the connector. A steel cable fixing hook (20) is provided inside the connector. One end of the retractable pull wire protection tube is connected to the steel cable outlet (3), and the other end is connected to the steel cable inlet (22). The steel cable of the crack gauge passes through the steel cable outlet (3) and penetrates the interior of the retractable pull wire protection tube, and is set on the steel cable fixing hook (20). The vertical supports are spaced apart at the bottom of the retractable pull-wire protection tube.

2. The wire-stayed crack gauge protection device according to claim 1, characterized in that: The crack gauge body protection chamber is rectangular in shape and includes a base and a protective shell. The protective shell is located on one side of the base and fits into the base.

3. The wire-stayed crack gauge protection device according to claim 2, characterized in that: The base includes a base plate and an adjustable support plate (1). The base plate is L-shaped and includes a bottom and a side. The steel cable outlet (3) is located on the side. The adjustable support plate (1) is located above the bottom through multiple threaded posts (4). The bottom edge that is not connected to the side is provided with a base connecting plate. Multiple base fixing holes (2) are provided on the base connecting plate.

4. The wire crack gauge protection device according to claim 2, characterized in that: The protective shell is rectangular, with an open bottom and one open side. The bottom edges of the other three sides extend vertically outward and are provided with shell connecting plates. Multiple shell connecting holes (5) are provided on the shell connecting plates.

5. The wire-stayed crack gauge protection device according to claim 1, characterized in that: The connector includes a cover and a mating shell. The cover is disposed on one side of the mating shell and fits into the mating shell.

6. The wire crack gauge protection device according to claim 5, characterized in that: The docking shell has a hexahedral structure with one side being an opening. The steel cable fixing hook (20) is located on the inner wall of the side wall opposite to the opening side. The edge of the side wall with the steel cable fixing hook (20) extends outward to provide docking shell connecting plates. The docking shell connecting plates are provided with multiple mounting holes (19). The outer periphery of the opening side is provided with several sealing fixing holes (18). The bottom of the docking shell is provided with connecting nuts (17).

7. The wire-stayed crack gauge protection device according to claim 5, characterized in that: The cover is a hexahedral structure with one side being an opening. The steel cable inlet (22) is located on the side wall opposite to the opening side, and a number of cover connection holes (21) are respectively opened on the outer periphery of the opening side.

8. The wire crack gauge protection device according to claim 1, characterized in that: The retractable cable protection tube includes a fixed end protection tube (6), an accessory protection tube (7), and a movable end protection tube (8) that are sequentially connected. The fixed end protection tube (6) is connected to the cable outlet (3), and the movable end protection tube (8) is connected to the cable inlet (22). A retaining strip (9) is provided at one end of the movable end protection tube (8) that is connected to the cable inlet (22).

9. The wire crack gauge protection device according to claim 1, characterized in that: The vertical support includes a support base plate (14), a vertical connecting rod, and a protective tube fixer. The support base plate (14) is set on the ground, the vertical connecting rod is set on the support base plate (14), and the protective tube fixer is set on the vertical connecting rod.

10. A wire crack gauge protection device according to claim 9, characterized in that: The protective tube holder includes an upper fixing member (10) and a lower fixing member (11). The lower fixing member (11) is located at the top of the vertical connecting rod. One end of the upper fixing member (10) is hinged to the lower fixing member (11), and the other end is connected to the lower fixing member (11) by a buckle (13).

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