A pipe joint type anchor rod body strength testing device

Abstract

This invention relates to the field of pipe-slot anchor rod strength testing technology, specifically a pipe-slot anchor rod strength testing device, including an auxiliary unit and a testing unit. The invention adjusts the clamping component to hold the outer wall of the anchor rod, adjusts the supporting component to support the inner wall of the anchor rod, and manually adjusts the abutment plate to contact the right end face of the support plate to support the annular sleeve. This allows the testing device to quickly align and fix with the anchor rod, ensuring the central axis of the threaded rod is aligned with the central axis of the anchor rod, thus ensuring the accuracy of the test results. An anti-detachment component ensures the anchor rod will not detach from the testing device, and the retaining ring will not be subjected to excessive thrust, preventing the retaining ring from detaching from the anchor rod during testing, which could affect the test results or even cause a testing accident.

Description

Technical Field

[0001] This invention relates to the field of pipe-slot anchor rod strength testing technology, specifically a pipe-slot anchor rod strength testing device. Background Technology

[0002] The slotted pipe anchor is a new type of anchor for full-length rock reinforcement. Its three-dimensional part is a high-strength steel pipe with longitudinal slots. When installed in a borehole with a diameter slightly smaller than the pipe diameter, it can immediately apply radial pressure to the borehole wall and frictional force to prevent the surrounding rock from sliding down along its entire length. Combined with the supporting force of the anchor plate, the surrounding rock is placed in a triaxial stress state. Under conditions such as blasting vibration and rock displacement, the anchoring force increases significantly in the later stages. When the surrounding rock undergoes significant displacement, the anchor does not lose its support resistance. In order to ensure its strength and stability, thereby ensuring construction safety and extending service life, tensile strength testing of the slotted pipe anchor is required.

[0003] Traditional slotted pipe anchors typically require specialized pull-out equipment for tensile strength testing. This involves connecting the equipment to the anchor and applying gradually increasing tension until displacement or a predetermined tension value is reached. The relationship between pull-out force and displacement is recorded to assess the anchor's load-bearing capacity. While the equipment can be secured with a retaining ring on the anchor body, the welded retaining ring is prone to detaching from the anchor body due to initial stress, making it impossible to obtain a tensile strength result. Alternatively, the anchor body can be directly welded to a metal bolt, but this method is costly as the bolt is disposable. Another approach involves clamping the anchor body externally with multiple bolts, a cumbersome process that makes the externally fixed portion prone to deformation under pressure, leading to inaccurate results. Furthermore, none of these methods can ensure that the central axis of the pull-out equipment coincides with the central axis of the slotted pipe anchor, further affecting the test results. Summary of the Invention

[0004] In view of the above problems, this application provides a tube-slot anchor rod strength testing device to solve the technical problem in the related art that the central axis of the pull-out device and the central axis of the tube-slot anchor rod cannot be guaranteed to coincide, and the anchor rod is deformed under external force, thus affecting the test results. To achieve the above objective, this application provides the following technical solution.

[0005] An embodiment of this application discloses a pipe-slot anchor rod strength testing device, comprising an auxiliary unit and a testing unit. The testing unit is mounted on the auxiliary unit and is used to test the tensile strength of the anchor rod. The auxiliary unit includes a circular plate that is tightly attached to the plate. An annular sleeve plate is fixedly installed on the left end of the circular plate. A circular insert is fixedly installed in the middle of the circular plate. A threaded rod is fixedly installed on the right end of the circular insert. A clamping component is provided on the annular sleeve plate. A supporting component is provided on the circular insert. A control component is provided on both the circular insert and the circular plate. A stop plate is provided on the left side of the annular sleeve plate. An anti-disengagement component is provided on the clamping component. The testing unit includes a hydraulic cylinder. A hydraulic cylinder is mounted on the threaded rod and located on the right side of the circular plate. A high-pressure oil pipe is fixedly connected to the lower end of the hydraulic cylinder. A hand-operated pressure pump is fixedly installed at the end of the high-pressure oil pipe. A nut is threadedly connected to the threaded rod one centimeter to the right of the hydraulic cylinder.

[0006] According to an embodiment of the present invention, the clamping member includes a threaded groove. The outer end of the annular sleeve plate is provided with a threaded groove. Guide grooves are uniformly provided along the circumference of the annular sleeve plate. Moving columns are slidably connected in the guide grooves. A tight-fitting block is fixedly installed at the end of each moving column. A circular ring plate is threadedly connected to the outer end of the annular sleeve plate. A fan-shaped groove with a triangular longitudinal section is provided in the middle of the circular ring plate. The inclined surface of the fan-shaped groove gradually faces the central axis of the circular ring plate from left to right. The fan-shaped groove is slidably connected to the moving column.

[0007] According to an embodiment of the present invention, the support member includes an extension groove. An extension groove is evenly provided on the circular insert post along its circumference. An extension post is slidably connected in the extension groove. A support block is fixedly installed at the end of the extension post. A control handle is rotatably connected to the circular plate. A bevel gear is fixedly installed at the rear end of the control handle. A frustum block is slidably connected in the middle of the circular insert post. The inclined surface of the frustum block gradually moves away from the central axis of the circular insert post from left to right. The extension post and the inclined surface of the frustum block are slidably connected.

[0008] According to an embodiment of the present invention, the control component includes a distance control screw, a circular insert is rotatably connected to the middle of the distance control screw, a second bevel gear is fixedly installed at the right end of the distance control screw, the second bevel gear meshes with the first bevel gear, and the distance control screw is threadedly connected to the frustum block.

[0009] According to an embodiment of the present invention, the abutment includes abutment screws, and the upper and lower sides of the annular sleeve are symmetrically threaded with abutment screws. A hexagonal block is fixedly installed on the outer left end of each abutment screw, and an abutment ball is fixedly installed on the left end of each abutment screw.

[0010] According to an embodiment of the present invention, the size of the mating block is larger than the size of the support block, the length of the mating block located in the groove of the slotted anchor rod is greater than the length of the other mating blocks, the length of the support block located in the groove of the slotted anchor rod is greater than the length of the other support blocks, and the support block located in the groove of the slotted anchor rod has a groove in the middle that mates with the corresponding mating block.

[0011] According to an embodiment of the present invention, the anti-detachment component includes a fixing groove. Excluding the tight-fitting block located in the groove of the slotted anchor rod body, the remaining tight-fitting blocks all have fixing grooves on their right ends. A cylindrical spring is fixedly installed in each fixing groove. A cylindrical rod is fixedly installed at the end of the cylindrical spring. A linkage rod is fixedly installed at the left end of the cylindrical rod. A wedge block is fixedly installed at the end of the linkage rod. The inclined surface of the wedge block gradually approaches the central axis of the anchor rod body from left to right. Excluding the tight-fitting block located in the groove of the slotted anchor rod body, the remaining tight-fitting blocks are slidably connected to a T-shaped pressure block at the end facing the central axis of the slotted anchor rod body. The pressure block and the corresponding wedge block are slidably connected.

[0012] As can be seen from the above technical solutions, the present invention has the following advantages:

[0013] 1. In this invention, the clamping component is adjusted to clamp the outer wall of the anchor rod, and the supporting component is adjusted by the control component to support the inner wall of the anchor rod. The abutment is manually adjusted to contact the right end face of the support plate to support the annular sleeve plate. This allows the testing device to be quickly aligned and fixed with the anchor rod body, ensuring that the central axis of the threaded rod is aligned with the central axis of the anchor rod body, thus ensuring the accuracy of the test results. The anti-detachment component ensures that the anchor rod body and the testing device will not detach, and the retaining ring will not be subjected to excessive thrust, thus avoiding the situation where the retaining ring detaches from the anchor rod body during the test, which would affect the test results.

[0014] 2. In this invention, the hexagonal blocks are manually rotated according to the inclination angle of the anchor rod and the distance between it and the tray, so that the abutment ball is in close contact with the tray, thereby supporting the detection device and increasing its stability.

[0015] 3. In this invention, during the pulling process, the cylindrical rod, the linkage rod and the wedge block cooperate to convert the resistance force in the left and right directions into the squeezing force in the up and down directions of the pressure block, ensuring that the anchor rod body and the testing device will not separate, and the retaining ring will not be subjected to excessive thrust, thereby avoiding the retaining ring from separating from the anchor rod body during the test, which would affect the test results or even cause a test accident.

[0016] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the embodiments of this application based on a slotted anchor rod strength testing device, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A front-view stereoscopic structure diagram provided according to an embodiment of the present invention is shown.

[0019] Figure 2 A front-view perspective view of a three-dimensional structure with the annular sleeve cut open according to an embodiment of the present invention is shown.

[0020] Figure 3 A schematic diagram of the front sectional planar structure provided according to an embodiment of the present invention is shown.

[0021] Figure 4 A schematic diagram of the front view plane structure provided according to an embodiment of the present invention is shown.

[0022] Figure 5 It shows Figure 4 A sectional view along the AA direction.

[0023] Figure 6 It shows Figure 5 A magnified view of a portion at point N.

[0024] The above figures include the following reference numerals:

[0025] 1. Auxiliary unit; 11. Close-fitting circular plate; 12. Annular sleeve plate; 13. Circular insert; 14. Threaded rod; 15. Clamping component; 151. Threaded groove; 152. Guide groove; 153. Moving column; 154. Close-fitting block; 155. Circular ring plate; 156. Fan-shaped groove; 16. Support component; 161. Extending groove; 162. Extending column; 163. Support block; 164. Control handle; 165. Bevel gear one; 166. Frustum block 17. Control component; 171. Distance control screw; 172. Bevel gear II; 18. Abutment plate; 181. Abutment screw; 182. Hexagonal block; 183. Abutment ball; 19. Anti-detachment component; 191. Fixing groove; 192. Cylindrical spring; 193. Cylindrical rod; 194. Linkage rod; 195. Wedge block; 196. Pressure block; 2. Detection unit; 21. Hydraulic cylinder; 22. High-pressure oil pipe; 23. Manual pressure pump; 24. Nut. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] See Figure 1 , Figure 2 and Figure 3 A pipe-slot anchor bolt strength testing device includes an auxiliary unit 1 and a testing unit 2. The testing unit 2 is mounted on the auxiliary unit 1 and is used to test the tensile strength of the anchor bolt. The auxiliary unit 1 includes a circular plate 11, an annular sleeve 12 fixedly installed at the left end of the circular plate 11, a circular insert 13 fixedly installed at the middle of the circular plate 11, a threaded rod 14 fixedly installed at the right end of the circular insert 13, a clamping member 15 provided on the annular sleeve 12, and a support member 13 provided on the circular insert 13. 6. A control component 17 is provided on both the circular insert 13 and the circular plate 11. A stop plate 18 is provided on the left side of the annular sleeve 12. An anti-detachment component 19 is provided on the clamping component 15. The detection unit 2 includes a hydraulic cylinder 21. The hydraulic cylinder 21 is sleeved on the threaded rod 14 and located on the right side of the circular plate 11. A high-pressure oil pipe 22 is fixedly connected to the lower end of the hydraulic cylinder 21. A hand-operated pressure pump 23 is fixedly installed at the end of the high-pressure oil pipe 22. A nut 24 is threadedly connected to the threaded rod 14 one centimeter to the right of the hydraulic cylinder 21.

[0028] First, use a pneumatic drill to drill an anchor hole in the coal and rock mass with a diameter smaller than that of the anchor rod body. Then, fit the tray onto the anchor rod body and use a pneumatic hammer to drive the anchor rod body into the anchor hole. The tray should be tightly attached to the outer wall of the coal and rock mass. Then, inject grout into the anchor rod body and the tray. After the cement grout solidifies, the anchor rod body and the tray are fixedly connected to the coal and rock mass. At this point, insert the circular insert 13 into the anchor rod body until it is tightly attached to the left end of the circular plate 11 and the right end of the anchor rod body. Then, adjust the clamping component 15 to clamp the outer wall of the anchor rod body. Adjust the support component 16 through the control component 17 to support the inner wall of the anchor rod body. Manually adjust the abutment component 18 to contact the right end face of the tray. Then, adjust the annular sleeve 1... 2. Support the device by fitting the hydraulic cylinder 21 onto the threaded rod 14, and then thread the nut 24 one centimeter to the right of the hydraulic cylinder 21. Connect the hand-controlled pressure pump 23 to the hydraulic cylinder 21 through the high-pressure oil pipe 22. Press the hand-controlled pressure pump 23 repeatedly to adjust the pressure of the hydraulic cylinder 21 until the extended end of the hydraulic cylinder 21 contacts the nut 24. Record the pressure data displayed by the hand-controlled pressure pump 23. This data is the tensile strength of the anchor rod. The anti-detachment component 19 ensures that the anchor rod will not detach from the testing device and that the retaining ring will not be subjected to excessive thrust, thereby preventing the retaining ring from detaching from the anchor rod during the test, which could affect the test results or even cause a testing accident.

[0029] See Figure 2 , Figure 5 and Figure 6 The clamping member 15 includes a threaded groove 151. The outer end of the annular sleeve plate 12 is provided with a threaded groove 151. Guide grooves 152 are evenly provided on the annular sleeve plate 12 along its circumference. Moving columns 153 are slidably connected in the guide grooves 152. A tight-fitting block 154 is fixedly installed at the end of each moving column 153. A circular ring plate 155 is threadedly connected to the outer end of the annular sleeve plate 12. A fan-shaped groove 156 with a triangular longitudinal section is provided in the middle of the circular ring plate 155. The inclined surface of the fan-shaped groove 156 gradually faces the central axis of the circular ring plate 155 from left to right. The fan-shaped groove 156 is slidably connected to the moving column 153.

[0030] See Figure 5 and Figure 6 The support member 16 includes an extension groove 161. The circular insert 13 is evenly provided with extension grooves 161 along its circumference. An extension column 162 is slidably connected in the extension groove 161. A support block 163 is fixedly installed at the end of the extension column 162. A control handle 164 is rotatably connected to the circular plate 11. A bevel gear 165 is fixedly installed at the rear end of the control handle 164. A frustum block 166 is slidably connected in the middle of the circular insert 13. The inclined surface of the frustum block 166 gradually moves away from the central axis of the circular insert 13 from left to right. The extension column 162 and the inclined surface of the frustum block 166 are slidably connected.

[0031] See Figure 3 and Figure 5 The control component 17 includes a distance control screw 171, a circular insert 13 is rotatably connected to the distance control screw 171, a second bevel gear 172 is fixedly installed on the right end of the distance control screw 171, the second bevel gear 172 meshes with the first bevel gear 165, and the distance control screw 171 is threadedly connected to the frustum block 166.

[0032] See Figure 3 The abutment plate 18 includes abutment screws 181. The upper and lower sides of the annular sleeve plate 12 are symmetrically threaded with abutment screws 181. Hexagonal blocks 182 are fixedly installed on the outer left side of the abutment screws 181, and abutment balls 183 are fixedly installed on the left side of the abutment screws 181.

[0033] See Figure 5 The size of the fastening block 154 is larger than the size of the support block 163. The length of the fastening block 154 located in the groove of the pipe-slot anchor rod is greater than the length of the other fastening blocks 154. The length of the support block 163 located in the groove of the pipe-slot anchor rod is greater than the length of the other support blocks 163. The support block 163 located in the groove of the pipe-slot anchor rod has a groove in the middle that matches the corresponding fastening block 154.

[0034] See Figure 6 The anti-detachment component 19 includes a fixing groove 191. Except for the tight-fitting block 154 located in the groove of the slotted anchor rod body, the right end of the remaining tight-fitting blocks 154 is provided with a fixing groove 191. A cylindrical spring 192 is fixedly installed in the fixing groove 191. A cylindrical rod 193 is fixedly installed at the end of the cylindrical spring 192. A linkage rod 194 is fixedly installed at the left end of the cylindrical rod 193. A wedge block 195 is fixedly installed at the end of the linkage rod 194. The inclined surface of the wedge block 195 gradually approaches the central axis of the anchor rod body from left to right. Except for the tight-fitting block 154 located in the groove of the slotted anchor rod body, the remaining tight-fitting blocks 154 are slidably connected to a T-shaped pressure block 196 at the end facing the central axis of the slotted anchor rod body. The pressure block 196 is slidably connected to the corresponding wedge block 195.

[0035] The working principle of this invention is as follows: First, use a pneumatic drill to drill an anchor hole in the coal and rock mass with a diameter smaller than that of the anchor rod body. Then, fit the tray into the anchor rod body and use a pneumatic hammer to drive the anchor rod body into the anchor hole. The tray is tightly attached to the outer wall of the coal and rock mass. Then, grout is injected into the anchor rod body and the tray. After the cement grout solidifies, the anchor rod body and the tray are fixedly connected to the coal and rock mass. At this time, insert the circular insert 13 into the anchor rod body until the left end of the circular plate 11 is tightly attached to the right end of the anchor rod body. Then, manually rotate the circular ring plate 155 to the left, so that the fan-shaped groove 156 on the circular ring plate 155 squeezes the moving column 153, so that the moving column 153 moves toward the central axis of the anchor rod body until the tight-fitting block 154 at the end of the moving column 153 is tightly attached to the outer wall of the anchor rod body.

[0036] At this time, rotating the control handle 164 drives the first bevel gear 165 to rotate. Under the drive of the first bevel gear 165, the second bevel gear 172 rotates accordingly, driving the control screw 171 to rotate, thereby driving the frustum block 166 to move to the left. Under the drive of the frustum block 166, the protruding column 162 drives the support block 163 to move away from the central axis of the anchor rod until the support block 163 is in close contact with the inner wall of the anchor rod. The support block 163 located in the groove of the slotted anchor rod is inserted into the corresponding close-fitting block 154. At this time, according to the inclination angle of the anchor rod and the distance between it and the tray, the hexagonal block 182 is manually rotated, thereby driving the abutment screw 181 to rotate and move to the left until the abutment balls 183 on the upper and lower abutment screws 181 are in close contact with the tray.

[0037] At this point, the hydraulic cylinder 21 is fitted onto the threaded rod 14, and then the nut 24 is threadedly connected one centimeter to the right of the hydraulic cylinder 21. The hand-controlled pressure pump 23 is connected to the hydraulic cylinder 21 through the high-pressure oil pipe 22. The hand-controlled pressure pump 23 is pressed repeatedly to adjust the pressure of the hydraulic cylinder 21 until the protruding end of the hydraulic cylinder 21 contacts the nut 24. At this time, the pressure data displayed by the hand-controlled pressure pump 23 is recorded. This data is the tensile strength of the anchor rod body. During the pull-out process, if the support block 163 and the tight-fitting block 154 move to the right due to the tension, The cylindrical rod 193 is first obstructed by the retaining ring. The cylindrical rod 193 is compressed, which causes the cylindrical spring 192 to compress, thereby causing the linkage rod 194 to move to the left. The linkage rod 194 causes the wedge block 195 to move to the left, causing the pressure block 196 to extend out of the close-fitting block 154, so that the pressure block 196 is further close to the anchor rod body, ensuring that the anchor rod body and the testing device will not separate, and the retaining ring will not be subjected to excessive thrust, thereby avoiding the retaining ring from separating from the anchor rod body during the test, affecting the test results or even causing a test accident.

[0038] In the description of this invention, it should be understood that the terms "center," "middle," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "end," "axial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0039] Furthermore, the terms "first," "second," "number one," "number two," "one," and "two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the strength of a slotted anchor bolt, characterized in that... It includes an auxiliary unit (1) and a detection unit (2). The detection unit (2) is located on the auxiliary unit (1) and is used to detect the tensile strength of the anchor rod. The auxiliary unit (1) includes a circular plate (11) that is close to the circular plate. An annular sleeve plate (12) is fixedly installed on the left end of the circular plate (11). A circular insert post (13) is fixedly installed in the middle of the circular plate (11). A threaded rod (14) is fixedly installed on the right end of the circular insert post (13). A clamping member (15) is provided on the annular sleeve plate (12). A support member (16) is provided on the circular insert post (13). A control member (17) is provided on both the circular insert post (13) and the circular plate (11). A stop plate member (18) is provided on the left side of the annular sleeve plate (12). An anti-detachment member (19) is provided on the clamping member (15). The detection unit (2) includes a cylinder (21), a cylinder (21) is fitted on the threaded rod (14) and located on the right side of the circular plate (11), a high-pressure oil pipe (22) is fixedly connected to the lower end of the cylinder (21), a hand-operated pressure pump (23) is fixedly installed at the end of the high-pressure oil pipe (22), and a nut (24) is threadedly connected on the threaded rod (14) one centimeter to the right of the cylinder (21); The clamping member (15) includes a threaded groove (151). The outer end of the annular sleeve plate (12) is provided with a threaded groove (151). The annular sleeve plate (12) is provided with guide grooves (152) evenly distributed along its circumference. Each guide groove (152) is slidably connected with a moving column (153). Each moving column (153) is fixedly installed with a tight-fitting block (154) at its end. The outer end of the annular sleeve plate (12) is threadedly connected with a circular ring plate (155). The middle part of the circular ring plate (155) is provided with a fan-shaped groove (156) with a triangular longitudinal section. The inclined surface of the fan-shaped groove (156) gradually faces the central axis of the circular ring plate (155) from left to right. The fan-shaped groove (156) is slidably connected with the moving column (153). The anti-detachment component (19) includes a fixing groove (191). Except for the tight-fitting block (154) located in the groove of the slotted anchor rod body, the right end of the remaining tight-fitting blocks (154) is provided with a fixing groove (191). A cylindrical spring (192) is fixedly installed in the fixing groove (191). A cylindrical rod (193) is fixedly installed at the end of the cylindrical spring (192). A linkage rod (194) is fixedly installed at the left end of the cylindrical rod (193). A wedge block (195) is fixedly installed at the end of the linkage rod (194). The inclined surface of the wedge block (195) gradually approaches the central axis of the anchor rod body from left to right. Except for the tight-fitting block (154) located in the groove of the slotted anchor rod body, the remaining tight-fitting blocks (154) are slidably connected to a T-shaped pressure block (196) at the end facing the central axis of the slotted anchor rod body. The pressure block (196) is slidably connected to the corresponding wedge block (195).

2. The pipe-slot anchor rod strength testing device according to claim 1, characterized in that: The support member (16) includes an extension groove (161). The circular insert (13) is evenly provided with extension grooves (161) along its circumference. An extension column (162) is slidably connected in the extension groove (161). A support block (163) is fixedly installed at the end of the extension column (162). A control handle (164) is rotatably connected to the circular plate (11). A bevel gear (165) is fixedly installed at the rear end of the control handle (164). A frustum block (166) is slidably connected in the middle of the circular insert (13). The inclined surface of the frustum block (166) gradually moves away from the central axis of the circular insert (13) from left to right. The extension column (162) and the inclined surface of the frustum block (166) are slidably connected.

3. The pipe-slot anchor rod strength testing device according to claim 1, characterized in that: The control component (17) includes a distance control screw (171), a circular insert (13) is rotatably connected to the distance control screw (171), a bevel gear two (172) is fixedly installed on the right end of the distance control screw (171), the bevel gear two (172) meshes with the bevel gear one (165), and the distance control screw (171) is threadedly connected to the frustum block (166).

4. The pipe-slot anchor rod strength testing device according to claim 1, characterized in that: The abutment component (18) includes abutment screws (181), and the upper and lower sides of the annular sleeve plate (12) are symmetrically threaded with abutment screws (181). Hexagonal blocks (182) are fixedly installed on the outer left side of the abutment screws (181), and abutment balls (183) are fixedly installed on the left side of the abutment screws (181).

5. The pipe-slot anchor rod strength testing device according to claim 1, characterized in that: The size of the clamping block (154) is larger than the size of the support block (163). The length of the clamping block (154) located in the groove of the pipe-slot anchor rod is greater than the length of the other clamping blocks (154). The length of the support block (163) located in the groove of the pipe-slot anchor rod is greater than the length of the other support blocks (163). The support block (163) located in the groove of the pipe-slot anchor rod has a groove in the middle that matches the corresponding clamping block (154).

6. The pipe-slot anchor rod strength testing device according to claim 5, characterized in that: After the tight-fitting block (154) extends out of the annular sleeve (12), the cylindrical rod (193) contacts the left end of the retaining ring on the anchor rod body when the cylindrical spring (192) is not under force.

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