A compression resistance detection device for a pre-buried water conservancy pipeline

Abstract

The application relates to the technical field of engineering pipeline detection, in particular to a compression resistance detection device for a pre-buried water conservancy engineering pipeline, which comprises a base, a mounting frame fixedly installed on the base, a sliding plate slidingly arranged on the base, and clamping pieces symmetrically arranged on the sliding plate; a pressure test mechanism installed on the mounting frame and comprising a limiting ring and a plurality of elastic detection pieces distributed along the circumference of the limiting ring; a reciprocating pushing piece installed on the mounting frame and connected with the elastic detection pieces; and an intermittent driving piece installed on the base. The elastic detection pieces temporarily detect the intermittence of work, the plurality of elastic detection pieces are controlled to rotate relative to the pipeline, and the pipeline can move relative to the elastic detection pieces, so that the elastic detection pieces can capture the thin-walled and recessed areas caused by uneven extrusion of a mold at different angles of the pipeline, and the local insufficient strength caused by defects of the extrusion mold on the pipeline can be quickly positioned.

Description

Technical Field

[0001] This invention relates to the technical field of engineering pipeline inspection, specifically a pressure resistance testing device for pre-buried water conservancy engineering pipelines. Background Technology

[0002] After production and before formal use, pressure testing is a crucial step in pressure testing of pipeline systems completed after manufacturing. Before conducting the pressure test, it is essential to clarify the pipeline's design parameters to determine the maximum test pressure the pipeline can withstand. Different pressure tests are required depending on the pipeline's intended use. For pre-buried hydraulic engineering pipelines, both internal and external pressure tests are necessary. The internal pressure test prevents defects in the pipeline due to manufacturing issues from preventing it from withstanding the maximum water pressure during actual water supply and drainage. The external pressure test prevents deformation of the pipeline due to pressure from concrete pouring or backfilling after burial.

[0003] Existing pipelines are generally manufactured using extrusion molding. However, if the extruded pipeline has defects, scratches or pits may appear on the outer surface of the mold. These defects often appear consecutively in the same location. When testing the compressive strength of engineering pipelines, pressure is applied to the pipeline at its maximum withstand pressure, and the outer wall of the pipeline is observed for deformation. However, this testing method cannot detect pipeline uniformity. During extrusion, damaged areas impede melt flow, causing material accumulation that forms bulges or uneven thickness. This accumulation becomes irregular with increasing extrusion time, resulting in different marks appearing along the same straight line of the pipeline. Therefore, multiple repeated tests are required, making it difficult to quickly and accurately locate weak areas in the pipeline and reducing the efficiency of the compressive strength test. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure resistance testing device for pre-embedded water conservancy pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A pressure resistance testing device for a pre-embedded water conservancy pipeline includes a base and a mounting bracket fixedly installed on the base. A sliding plate is slidably arranged on the base, and clamping elements are symmetrically arranged on the sliding plate for limiting and clamping the pipeline.

[0007] A pressure testing mechanism, mounted on the mounting frame, includes a limiting ring and a plurality of elastic testing elements distributed along the circumference of the limiting ring;

[0008] A reciprocating pusher is mounted on the mounting bracket, arranged along the axial direction of the limiting ring, and connected to the elastic detection element. When the reciprocating pusher moves along the axial direction of the pipeline, the elastic detection element moves relative to the limiting ring and squeezes the pipeline to detect the deformation change of the elastic detection element.

[0009] An intermittent drive, mounted on the base, is capable of intermittently controlling the movement of the pipe relative to the elastic detection element, which in turn is capable of deflecting relative to the pipe.

[0010] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: a guide rail is fixedly installed on the base, the slide plate is slidably installed on the guide rail, and a threaded pusher is provided on the base to control the slide plate to move along the length direction of the guide rail.

[0011] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: the threaded pusher includes a second lead screw rotatably mounted on the base, a movable cylinder threadedly connected to the second lead screw, and the movable cylinder being fixed to the slide plate.

[0012] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: the elastic testing element includes a compression sleeve, a bearing clamp is fixedly installed on the compression sleeve, a plurality of strip grooves that are slidably connected to the bearing clamp are distributed along the circumference of the limiting ring, a cylindrical cavity is formed inside the compression sleeve, a compression shaft is slidably installed in one end of the cylindrical cavity, and a pressure sensor is fixedly installed in the other end; a pressure plate with an arc-shaped structure that can abut against the pipeline is fixedly installed on the end of the compression shaft away from the compression sleeve;

[0013] It also includes a spring, which is disposed in the cylindrical cavity, with one end of the spring abutting against the extrusion shaft and the other end abutting against the pressure sensor.

[0014] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: a drive cylinder is rotatably mounted on the mounting frame, and a sliding groove is formed on the outer wall of the drive cylinder. When the drive cylinder rotates, the reciprocating pusher performs a reciprocating motion, and the extrusion sleeve is reciprocated and extruded through multiple connecting rods.

[0015] The reciprocating pusher includes a sleeve, which is arranged along the axial direction of the drive cylinder and slidably connected to the base. A first ball bearing that is movably disposed on the inner wall of the sleeve and slidably adapted to the slide groove is provided.

[0016] It also includes a connecting ring rotatably mounted on the sleeve, the connecting ring being hinged to the connecting rod, and the end of the connecting rod away from the connecting ring being hinged to the extrusion sleeve.

[0017] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: the intermittent drive component includes a first lead screw rotatably mounted on the base, the first lead screw being driven to rotate by a servo motor fixedly mounted on the base, and a threaded cylinder being threadedly connected to the first lead screw, a connecting hoop being fixedly mounted on the threaded cylinder, and a first sleeve and a second sleeve being fixedly mounted on both sides of the connecting hoop respectively.

[0018] It also includes a first drive shaft and a second drive shaft that are rotatably mounted on the base, and the first sleeve and the second sleeve are slidably sleeved on the first drive shaft and the second drive shaft, respectively.

[0019] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: a first limiting groove and a second limiting groove are respectively formed on the first drive shaft and the second drive shaft;

[0020] A second ball bearing is movably disposed on the inner wall of the first sleeve and slides in cooperation with the first limiting groove, and a third ball bearing is movably disposed on the inner wall of the second sleeve and slides in cooperation with the second limiting groove.

[0021] As described above, the pressure resistance testing device for pre-embedded water conservancy pipelines: the first drive shaft is connected to the first rotating shaft rotatably mounted on the mounting frame via the first toothed belt, and a third gear is fixedly connected to the first rotating shaft. The third gear can mesh with the second toothed ring fixedly mounted on the drive cylinder.

[0022] The pressure resistance testing device for pre-embedded water conservancy pipelines as described above: the second drive shaft is connected to the second lead screw through a gear set;

[0023] The second drive shaft is connected to the second central shaft rotatably mounted on the mounting bracket via the second toothed belt, and a fourth gear is fixedly connected to the second central shaft. The fourth gear can mesh with the first toothed ring fixedly mounted on the limiting ring.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] When elastic testing elements are used to test the compressive strength of pipelines, the changes in the deformation of the elastic testing elements can be used to test whether the compressive strength of the pipeline's outer wall is up to standard. During the intermittent testing of the elastic testing elements, the rotation of the limiting ring drives multiple elastic testing elements to rotate synchronously, allowing the elastic testing elements to perform circumferential testing of the pipeline. This maintains a constant contact pressure with the pipe wall, ensuring uniform testing of the pipeline's outer wall compressive strength. The loading force is evenly distributed throughout the circumference, and it can capture thin walls, depressions, or stress concentration areas caused by uneven extrusion die at different angles. At the same time, the pipeline can automatically move intermittently during testing to test the compressive performance at different locations, quickly locating localized strength deficiencies caused by extrusion die defects, further accelerating the efficiency of pipeline compressive strength testing. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a pressure resistance testing device for pre-buried water conservancy pipelines.

[0027] Figure 2 This is a schematic diagram of the clamping component in a pressure resistance testing device for pre-embedded water conservancy pipelines.

[0028] Figure 3 This is a schematic diagram of the limiting ring and drive cylinder in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0029] Figure 4 This is a schematic diagram of the elastic testing component and the reciprocating pushing component in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0030] Figure 5 This is a schematic diagram of the elastic testing element in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0031] Figure 6 This is a schematic diagram of the reciprocating pusher component in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0032] Figure 7 This is a schematic diagram of the intermittent drive component in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0033] Figure 8 This is a schematic diagram of the first and second drive shafts in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0034] Figure 9 This is a schematic diagram of the structure of the first lead screw, the first drive shaft, and the second drive shaft in the pressure resistance testing device for pre-buried water conservancy pipelines.

[0035] Figure 10 This is a schematic diagram of the threaded sleeve, the first sleeve, and the second sleeve in a pressure resistance testing device for pre-buried water conservancy pipelines.

[0036] In the diagram: 1. Base; 2. Mounting bracket; 3. Guide rail; 4. Slide plate; 5. Clamping component; 6. Support hoop; 7. Drive cylinder; 701. Slide groove; 8. Limiting ring; 801. Strip groove; 9. First toothed ring; 10. Second toothed ring; 11. Extrusion sleeve; 12. Connecting rod; 13. Extrusion shaft; 1301. Pressure plate; 14. Spring; 15. Sleeve; 1501. First ball bearing; 16. Connecting ring; 17. Servo motor; 18. First lead screw; 19. First transmission... Drive shaft; 1901, first limiting groove; 20, second transmission shaft; 2001, second limiting groove; 21, second lead screw; 22, moving cylinder; 23, gear set; 24, first toothed belt; 25, first intermediate shaft; 26, third gear; 27, second toothed belt; 28, second intermediate shaft; 29, fourth gear; 30, threaded cylinder; 31, connecting clamp; 32, first sleeve; 3201, second ball bearing; 33, second sleeve; 3301, third ball bearing. Detailed Implementation

[0037] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0038] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0039] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0040] Please see Figures 1-10 In this embodiment of the invention, a pressure resistance testing device for a pre-embedded water conservancy pipeline includes a base 1 and a mounting bracket 2 fixedly installed on the base 1. A sliding plate 4 is slidably arranged on the base 1, and clamping members 5 are symmetrically arranged on the sliding plate 4 for limiting and clamping the pipeline.

[0041] The pressure testing mechanism, installed on the mounting frame 2, includes a limiting ring 8 and a plurality of elastic testing elements distributed along the circumference of the limiting ring 8;

[0042] A reciprocating pusher is mounted on the mounting bracket 2, arranged along the axial direction of the limiting ring 8, and connected to the elastic detection element. When the reciprocating pusher moves along the axial direction of the pipeline, the elastic detection element moves relative to the limiting ring 8 and squeezes the pipeline to detect the deformation change of the elastic detection element.

[0043] An intermittent drive element, mounted on the base 1, is capable of intermittently controlling the movement of the pipe relative to the elastic detection element, while the elastic detection element is capable of deflecting relative to the pipe.

[0044] It should be noted that the compressive strength of the inner and outer walls of the pre-buried water conservancy pipeline needs to be tested separately. In this embodiment, the compressive strength of the outer wall of the pipeline is tested.

[0045] In this embodiment, when performing a pressure test on the outer wall of the pipeline, the intermittent drive component is activated, causing the reciprocating pusher to perform multiple reciprocating movements along the axial direction of the pipeline. During each set of reciprocating movements, multiple elastic detection elements simultaneously move relative to the limiting ring 8 and apply pressure to the pipeline. The elastic detection elements apply pressure to the pipeline until it reaches the maximum rated force that the outer wall of the pipeline can withstand, and this pressure is maintained for a certain period. The change in the deformation of the elastic detection elements during this period can be used to test whether the pressure resistance of the outer wall of the pipeline is qualified. When the reciprocating pusher completes one set of reciprocating movements, the elastic detection elements complete a section of the test on the pipeline. During the intervals between the multiple reciprocating movements of the reciprocating pusher, the pressure is tested intermittently... Driven by the driving component, the slide plate 4 slides relative to the guide rail 3, causing the pipe to move relative to the elastic detection element. At the same time, the limiting ring 8 rotates, causing multiple elastic detection elements to rotate synchronously, enabling the elastic detection elements to perform circumferential testing on the pipe and maintain a constant contact pressure with the pipe wall. This ensures uniform testing of the compressive strength of the pipe's outer wall, resulting in a uniform distribution of the loading force across the entire circumference. It can capture thin walls, depressions, or stress concentration areas caused by uneven extrusion molds at different angles. Furthermore, the pipe can automatically move intermittently during testing to detect the compressive performance at different locations, quickly locating localized strength deficiencies caused by defects in the extrusion mold, and further refining the pipe's compressive strength test results.

[0046] As a further embodiment of the present invention, please refer to... Figure 2 and Figure 9 The base 1 is fixedly mounted with a guide rail 3, and the slide plate 4 is slidably mounted on the guide rail 3. The base 1 is provided with a threaded pusher, which can control the slide plate 4 to move along the length direction of the guide rail 3.

[0047] The threaded pusher includes a second lead screw 21 rotatably mounted on the base 1, and a movable cylinder 22 is threadedly connected to the second lead screw 21. The movable cylinder 22 is fixed to the slide plate 4.

[0048] Considering that the mold may wear down during long-term use, resulting in the formed pipe's size or shape not meeting requirements, and that scratches or pits may appear on the outer surface of the mold, these defects will form continuous marks on the formed pipe. Therefore, circumferential inspection of the pipe is required. However, during mold extrusion, damaged areas will obstruct the flow of melt, causing material to accumulate and form bulges or uneven thickness. This accumulation will change irregularly with increasing extrusion time, resulting in different marks appearing on the same straight line of the pipe. When inspecting the pipe, it is necessary to move the pipe to quickly locate the localized areas of insufficient strength caused by defects in the extrusion mold.

[0049] As a further embodiment of the present invention, please refer to... Figure 5 The elastic detection element includes a compression sleeve 11, on which a receiving collar is fixedly installed. Multiple strip grooves 801, which are slidably connected to the receiving collar, are distributed circumferentially on the limiting ring 8. A cylindrical cavity is formed inside the compression sleeve 11. A compression shaft 13 is slidably disposed in one end of the cylindrical cavity, and a pressure sensor is fixedly installed in the other end. A pressure plate 1301, which is arc-shaped and can abut against the pipe, is fixedly disposed on the end of the compression shaft 13 away from the compression sleeve 11.

[0050] It also includes a spring 14, which is disposed in the cylindrical cavity. One end of the spring 14 abuts against the extrusion shaft 13, and the other end abuts against the pressure sensor.

[0051] In the initial state, the pressure plate 1301 is separated from the pipeline, which facilitates the pipeline to be limited and does not interfere with the pipeline when passing between the limiting rings 8.

[0052] Preferably, a support hoop 6 is fixedly installed on the mounting bracket 2, and a limiting ring 8 is rotatably connected to the support hoop 6.

[0053] During formal testing, under the control of the reciprocating pusher, multiple extrusion sleeves 11 are simultaneously pushed towards the pipeline, causing the pressure plate 1301 to move towards the pipeline until the pressure plate 1301 abuts against the pipeline. At this time, the spring 14 is in a compressed state, and the elastic potential energy automatically stored by the spring 14 reaches the rated compressive strength that the outer wall of the pipeline can withstand. After the pressure applied by the pressure plate 1301 to the outer wall of the pipeline continues for a period of time, the pressure plate 1301 can automatically reset under the drive of the reciprocating pusher. During the testing process, the compressive strength of the pipeline is judged to be qualified based on the data transmitted by the pressure sensor. When the limit ring 8 rotates relative to the pipeline, the pressure plate 1301 can perform compressive strength testing on different angle positions of the pipeline. It can capture thin walls, depressions or stress concentration areas caused by uneven extrusion molds at different angles, thereby quickly detecting and locating areas on the pipeline with unqualified compressive strength.

[0054] As a further embodiment of the present invention, please refer to... Figure 6 A drive cylinder 7 is rotatably mounted on the mounting bracket 2. A sliding groove 701 is formed on the outer wall of the drive cylinder 7. When the drive cylinder 7 rotates, the reciprocating pusher performs a reciprocating action and controls the extrusion sleeve 11 to reciprocate and extrude through multiple connecting rods 12.

[0055] The reciprocating pusher includes a sleeve 15, which is arranged along the axial direction of the drive cylinder 7 and slidably connected to the base 1. A first ball bearing 1501 is movably arranged on the inner wall of the sleeve 15 and is slidably adapted to the slide groove 701.

[0056] It also includes a connecting ring 16 rotatably mounted on the sleeve 15, the connecting ring 16 being hinged to the connecting rod 12, and the end of the connecting rod 12 away from the connecting ring 16 being hinged to the extrusion sleeve 11.

[0057] In one embodiment, a guide hoop is slidably disposed on the base 1. The guide hoop is fixed to the sleeve 15, so that when the drive cylinder 7 rotates, the sleeve 15 moves linearly along the axial direction of the drive cylinder 7 under the restriction of the guide hoop.

[0058] Under the control of the intermittent drive, when the drive cylinder 7 rotates, the groove 701 on it exerts an inclined force on the first ball 1501. At this time, under the restriction of the guide hoop, the sleeve 15 moves in a reciprocating linear motion along the axial direction of the drive cylinder 7. When the sleeve 15 moves, it can drive the connecting ring 16 to move synchronously. When the first ball 1501 moves to the end of the groove 701, the drive cylinder 7 stops rotating under the control of the intermittent drive. At this time, the pressure plate 1301 abuts against the pipeline, and time is reserved for the pressure plate 1301 to test the compressive strength of the pipeline.

[0059] When the extrusion sleeve 11 deflects relative to the pipeline, the connecting ring 16 rotates relative to the sleeve 15 under the drive of the connecting rod 12, and the rotation of the extrusion sleeve 11 does not interfere with the position of the sleeve 15.

[0060] As a further embodiment of the present invention, please refer to... Figure 7 , Figure 8 , Figure 9 and Figure 10 The intermittent drive component includes a first lead screw 18 rotatably mounted on the base 1. The first lead screw 18 is driven to rotate by a servo motor 17 fixedly mounted on the base 1. A threaded cylinder 30 is threadedly connected to the first lead screw 18. A connecting clamp 31 is fixedly mounted on the threaded cylinder 30. A first sleeve 32 and a second sleeve 33 are fixedly mounted on both sides of the connecting clamp 31, respectively.

[0061] It also includes a first drive shaft 19 and a second drive shaft 20 rotatably mounted on the base 1, and the first sleeve 32 and the second sleeve 33 are respectively slidably sleeved on the first drive shaft 19 and the second drive shaft 20.

[0062] Preferably, a first limiting groove 1901 and a second limiting groove 2001 are formed on the first drive shaft 19 and the second drive shaft 20, respectively;

[0063] The inner wall of the first sleeve 32 is movably provided with a second ball bearing 3201 that slides in cooperation with the first limiting groove 1901, and the inner wall of the second sleeve 33 is movably provided with a third ball bearing 3301 that slides in cooperation with the second limiting groove 2001.

[0064] The first limiting groove 1901 is divided into multiple segments (including a threaded groove A, a straight groove B, and a threaded groove C), and adjacent multiple segments are connected by a straight groove D. The second limiting groove 2001 is a combination of multiple segments of a straight groove and b threaded groove. The multiple segments are aligned with the a straight groove, and the D straight groove is aligned with the b threaded groove, thereby enabling the intermittent rotation of the first drive shaft 19 and the second drive shaft 20.

[0065] The first drive shaft 19 is connected to the first intermediate shaft 25 rotatably mounted on the mounting bracket 2 via the first toothed belt 24. The first intermediate shaft 25 is fixedly connected to the third gear 26, which can mesh with the second toothed ring 10 fixedly mounted on the drive cylinder 7.

[0066] The second drive shaft 20 is connected to the second lead screw 21 via a gear set 23;

[0067] The second drive shaft 20 is connected to the second central shaft 28 rotatably mounted on the mounting bracket 2 via the second toothed belt 27, and a fourth gear 29 is fixedly connected to the second central shaft 28. The fourth gear 29 can mesh with the first toothed ring 9 fixedly mounted on the limiting ring 8.

[0068] Initially, the second ball bearing 3201 is located in thread groove A, and the third ball bearing 3301 is located in linear groove a. When the servo motor 17 is started, its output shaft is fixed to the first lead screw 18, causing the first lead screw 18 to rotate synchronously when the output shaft rotates. When the first lead screw 18 rotates, under the constraint of the connecting clamp 31, it drives the threaded cylinder 30 to move linearly along the axial direction of the first lead screw 18. The movement of the connecting clamp 31 can drive the first sleeve 32 and the second sleeve 33 to move synchronously. At this time, the second ball bearing 3201 exerts an tilting force on thread groove A, causing the first transmission shaft 19 to rotate. Through transmission, the rotation can be controlled... Multiple pressure plates 1301 move toward the pipeline simultaneously. When the second ball 3201 moves into the straight groove B, the pressure plate 1301 is in contact with the pipeline for a period of time. When the second ball 3201 moves into the straight groove D, the third ball 3301 moves into the threaded groove b. At this time, the second drive shaft 20 rotates. Through transmission, the pipeline can be controlled to move relative to the pressure plate 1301. At the same time, multiple pressure plates 1301 can rotate relative to the pipeline simultaneously. This allows the pressure plate 1301 to continuously test the compressive strength of the pipeline at different angles and quickly locate localized insufficient strength caused by defects in the extrusion die.

[0069] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A compressive strength testing device for pre-embedded water conservancy pipelines, comprising a base (1) and a mounting bracket (2) fixedly installed on the base (1), characterized in that, A sliding plate (4) is slidably disposed on the base (1), and clamping members (5) are symmetrically disposed on the sliding plate (4) for limiting and clamping the pipe; The pressure testing mechanism is installed on the mounting frame (2) and includes a limiting ring (8) and a plurality of elastic testing elements distributed along the circumference of the limiting ring (8); A reciprocating pusher is installed on the mounting bracket (2), arranged along the axial direction of the limiting ring (8), and connected to the elastic detection member. When the reciprocating pusher moves along the axial direction of the pipeline, the elastic detection member moves relative to the limiting ring (8) and squeezes the pipeline to detect the deformation change of the elastic detection member. An intermittent drive, mounted on the base (1), is capable of intermittently controlling the movement of the pipe relative to the elastic detection element, while the elastic detection element is capable of deflecting relative to the pipe; A drive cylinder (7) is rotatably mounted on the mounting bracket (2). A sliding groove (701) is formed on the outer wall of the drive cylinder (7). When the drive cylinder (7) rotates, the reciprocating pusher performs a reciprocating action. The intermittent drive component includes a first lead screw (18) rotatably mounted on the base (1). The first lead screw (18) is driven to rotate by a servo motor (17) fixedly mounted on the base (1). A threaded cylinder (30) is threadedly connected to the first lead screw (18). A connecting clamp (31) is fixedly mounted on the threaded cylinder (30). A first sleeve (32) and a second sleeve (33) are fixedly mounted on both sides of the connecting clamp (31). It also includes a first drive shaft (19) and a second drive shaft (20) rotatably mounted on the base (1), and the first sleeve (32) and the second sleeve (33) are respectively slidably sleeved on the first drive shaft (19) and the second drive shaft (20); The second drive shaft (20) is connected to the second central shaft (28) rotatably mounted on the mounting bracket (2) via the second toothed belt (27), and a fourth gear (29) is fixedly connected to the second central shaft (28), which can mesh with the first toothed ring (9) fixedly mounted on the limiting ring (8); The first drive shaft (19) and the second drive shaft (20) are respectively provided with a first limiting groove (1901) and a second limiting groove (2001). The first limiting groove (1901) is divided into a multi-segment groove, including a threaded groove A, a straight groove B, and a threaded groove C. Adjacent multi-segment grooves are connected by a straight groove D. The second limiting groove (2001) is composed of multiple segments of a straight groove and b thread groove. The multi-segment groove is aligned with the a straight groove, and the D straight groove is aligned with the b thread groove. The inner wall of the first sleeve (32) is movably provided with a second ball (3201) that slides in cooperation with the first limiting groove (1901), and the inner wall of the second sleeve (33) is movably provided with a third ball (3301) that slides in cooperation with the second limiting groove (2001). The first drive shaft (19) is connected to the first intermediate shaft (25) rotatably mounted on the mounting bracket (2) via the first toothed belt (24). The first intermediate shaft (25) is fixedly connected to the third gear (26), which can mesh with the second toothed ring (10) fixedly mounted on the drive cylinder (7).

2. The compressive strength testing device for a pre-embedded water conservancy pipeline according to claim 1, characterized in that, A guide rail (3) is fixedly installed on the base (1), and the slide plate (4) is slidably installed on the guide rail (3). A threaded pusher is provided on the base (1) to control the slide plate (4) to move along the length direction of the guide rail (3).

3. The compressive strength testing device for a pre-embedded water conservancy pipeline according to claim 2, characterized in that, The threaded pusher includes a second lead screw (21) rotatably mounted on the base (1), and a movable cylinder (22) is threadedly connected to the second lead screw (21), and the movable cylinder (22) is fixed to the slide plate (4).

4. The compressive strength testing device for a pre-embedded water conservancy pipeline according to claim 3, characterized in that, The elastic detection element includes a compression sleeve (11), on which a receiving clamp is fixedly installed. The limiting ring (8) has multiple strip grooves (801) distributed along its circumference that are slidably connected to the receiving clamp. A cylindrical cavity is formed inside the compression sleeve (11). A compression shaft (13) is slidably installed in one end of the cylindrical cavity, and a pressure sensor is fixedly installed in the other end. A pressure plate (1301) that can abut against the pipeline in an arc-shaped structure is fixedly installed on the end of the compression shaft (13) away from the compression sleeve (11). It also includes a spring (14), which is disposed in the cylindrical cavity. One end of the spring (14) abuts against the extrusion shaft (13), and the other end abuts against the pressure sensor.

5. The compressive strength testing device for a pre-embedded water conservancy pipeline according to claim 4, characterized in that, The extrusion sleeve (11) is reciprocated by multiple connecting rods (12); The reciprocating pusher includes a sleeve (15), which is arranged along the axial direction of the drive cylinder (7) and slidably connected to the base (1). A first ball (1501) is movably arranged on the inner wall of the sleeve (15) and is slidably adapted to the slide groove (701). It also includes a connecting ring (16) rotatably mounted on the sleeve (15), the connecting ring (16) being hinged to the connecting rod (12), and the end of the connecting rod (12) away from the connecting ring (16) being hinged to the extrusion sleeve (11).

6. The compressive strength testing device for a pre-embedded water conservancy pipeline according to claim 5, characterized in that, The second drive shaft (20) is connected to the second lead screw (21) via a gear set (23).

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