Vertical multi-leg self-limiting detection head and self-coordinated positioning type steel pipe hardness detection device

Abstract

The vertical multi-leg self-limiting detection head and the self-coordinated positioning type steel pipe hardness detection device currently do not have a standard processing mode capable of processing the coordination and adjustment between the hardness detection head body and the steel pipe positioning structure; the front side of the protective frame body is hingedly connected with a transparent protective plate, two self-adjusting clamping mechanisms are vertically and parallelly arranged on the detection table body, an actuator is arranged on the top inner wall of the protective frame body, a vertical multi-leg self-limiting detection head is arranged at the lower end of the actuator, and the vertical multi-leg self-limiting detection head is between the two self-adjusting clamping mechanisms; the hardness detection head body is arranged in the middle connecting sleeve, a pressure sensor is arranged at the upper end of the hardness detection head body, two self-adjusting supporting and limiting units are parallelly arranged on the outer wall of the middle connecting sleeve, a positioning guide rod is vertically arranged in the positioning seat, a limiting block is arranged at the upper end of the positioning guide rod, an inclined bottom wall abutting leg is arranged at the lower end of the positioning guide rod, and a reset spring is sleeved on the positioning guide rod.

Description

Technical Field

[0001] This utility model belongs to the field of building material hardness testing technology, specifically relating to a vertical multi-leg self-limiting testing head and a self-cooperative positive positioning steel pipe hardness testing device. Background Technology

[0002] Steel pipes have a hollow cross-section and are a type of steel material whose length is much greater than its diameter or circumference. According to the material, they are classified into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes, and composite steel pipes. According to their uses, they are classified into steel pipes for transportation pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, and high-pressure equipment.

[0003] When performing hardness testing on existing circular steel pipes, the following problems may occur:

[0004] 1. When testing round steel pipes, the pipes need to be fixed. After fixing, the hardness of the steel pipe is measured by the hardness testing head. However, during testing, if the positioning of the round steel pipe and the detection position of the hardness testing head are not synchronized, the round steel pipe may rotate, affecting the testing results. When the round steel pipe rotates uncontrollably, it will affect the testing quality of the testing head. Wear is the least significant impact. It may also cause bending of the rod at the connection between the steel pipe and the testing head. Bending deformation affects the hardness test results of the steel pipe.

[0005] Second, when the hardness of the outer surface of a round tube is being tested, the hardness testing head body fails to maintain its position continuously as intended, resulting in shaking or displacement of the head body. Because it is not in the required adaptive connection state, not only is the service life of the testing head shortened, but the durable and effective testing performance of the testing head is also not guaranteed. When the testing quality deteriorates, it cannot be detected in time, increasing the workload of verifying the testing quality and data conclusions.

[0006] Currently, there is no standardized method for handling the coordinated adjustment between the hardness testing head body and the steel pipe positioning structure. Utility Model Content

[0007] To address the problems mentioned in the background section, the purpose of this invention is to provide a vertical multi-leg self-limiting detection head and a self-cooperative positive positioning steel pipe hardness detection device.

[0008] A vertical multi-leg self-limiting detection head includes a downward positioning composite seat and a hardness detection head body. The downward positioning composite seat includes a pressure sensor, a central connecting sleeve, and two self-adjusting support limiting units. The hardness detection head body is inserted into the central connecting sleeve. The pressure sensor is installed at the upper end of the hardness detection head body, and the lower end of the hardness detection head body is the detection end. Two self-adjusting support limiting units are arranged side by side on the outer wall of the central connecting sleeve. Each self-adjusting support limiting unit includes a positioning seat, a positioning guide rod, a return spring, an inclined bottom wall-mounted support foot, and a limiting block. The positioning seat is set on the outer wall of the central connecting sleeve. The positioning guide rod is vertically inserted into the positioning seat. A limiting block is installed at the upper end of the positioning guide rod, and an inclined bottom wall-mounted support foot is installed at the lower end of the positioning guide rod. A return spring is fitted on the positioning guide rod and is located between the inclined bottom wall-mounted support foot and the positioning seat.

[0009] As a preferred option: the sloping bottom wall-mounted support is a triangular block, and the bottom surface of the triangular block is an inclined surface or an outwardly convex arc surface.

[0010] The self-coordinating positive positioning steel pipe hardness testing device, utilizing the aforementioned vertical multi-leg self-limiting detection head, includes a support base, a testing platform, a protective frame, a transparent protective plate, an actuator, a vertical multi-leg self-limiting detection head, and two self-adjusting clamping mechanisms. Support bases are fixedly installed on both sides of the bottom of the testing platform, and a protective frame is installed at the top of the testing platform. A transparent protective plate is hinged to the front of the protective frame. Two self-adjusting clamping mechanisms are vertically arranged side-by-side on the testing platform. An actuator is installed on the top inner wall of the protective frame, and a vertical multi-leg self-limiting detection head is installed at the lower end of the actuator, positioned between the two self-adjusting clamping mechanisms.

[0011] The vertical multi-leg self-limiting detection head includes a downward positioning composite seat and a hardness detection head body. The downward positioning composite seat includes a pressure sensor, a central connecting sleeve, and two self-adjusting support limiting units. The hardness detection head body is inserted into the central connecting sleeve. The pressure sensor is installed at the upper end of the hardness detection head body, and the lower end of the hardness detection head body is the detection end. Two self-adjusting support limiting units are arranged side by side on the outer wall of the central connecting sleeve. Each self-adjusting support limiting unit includes a positioning seat, a positioning guide rod, a return spring, an inclined bottom wall-mounted support foot, and a limiting block. The positioning seat is set on the outer wall of the central connecting sleeve. The positioning guide rod is vertically inserted into the positioning seat. A limiting block is installed at the upper end of the positioning guide rod, and an inclined bottom wall-mounted support foot is installed at the lower end of the positioning guide rod. A return spring is fitted on the positioning guide rod and is located between the inclined bottom wall-mounted support foot and the positioning seat.

[0012] As a preferred embodiment: the bottom of the support base has several recessed grooves, and an anti-slip rubber pad is fixedly installed in the groove. The bottom of the anti-slip rubber pad protrudes from the bottom of the support base, and the bottom of the anti-slip rubber pad has several recessed anti-slip grooves.

[0013] As a preferred embodiment: the upper end face of the testing platform is provided with a concave inverted T-shaped sliding groove, and the bottom center of the inverted T-shaped sliding groove is provided with a concave adjustment and installation groove.

[0014] As a preferred embodiment, the protective frame is a rectangular frame with openings at the bottom and front, and the bottom of the protective frame is welded to the inner edge of the upper surface of the testing platform.

[0015] As a preferred embodiment: the self-adjusting clamping mechanism includes a lower fixed block, a T-shaped slider, supporting balls, a drive mechanism, clamps, a connecting block, an upper fixed block, guide rods, and guide blocks; a T-shaped slider is fixedly installed at the bottom of the lower fixed block, and the T-shaped slider is slidably connected in an inverted T-shaped groove. Mounting holes are provided on both sides of the bottom of the T-shaped slider, and supporting balls are installed in the mounting holes. The lowest point of the outer wall of the supporting balls contacts the bottom of the inverted T-shaped groove. The drive mechanism is installed in the adjusting mounting groove by bolts. The bottom center of the T-shaped slider is connected to the drive mechanism by bolts. Clamps are fixedly installed on both the front and rear ends of the lower fixed block. The upper end of the clamp's rod is fixedly connected to the bottom of the connecting block. The connecting block is welded to the upper fixed block. A guide block is provided on each side of the top of the lower fixed block, and each guide block has a through guide hole. Guide rods are slidably connected in the guide holes, and the upper ends of both guide rods are fixedly connected to the bottom of the connecting block.

[0016] As a preferred embodiment, both the upper end face of the lower fixing block and the bottom of the upper fixing block are provided with concave V-shaped fixing grooves.

[0017] As a preferred embodiment: the drive mechanism includes a bearing housing, a lead screw, a lead screw nut, and a drive motor; bearings are fixedly installed in the mounting holes of the two bearing housings, and the two ends of the lead screw are respectively fixedly installed on the inner rings of the bearings in the two bearing housings. The lead screw is connected to the lead screw nut by threads, and the upper end face of the lead screw nut is provided with two connecting feet. The drive motor is installed on the outer wall of one bearing housing by bolts, and the shaft of the drive motor is fixedly connected to one end of the lead screw by a bushing.

[0018] As a preferred embodiment, mounting plates are symmetrically fixedly installed on the housing of the clamp, and mounting through holes are provided on the mounting plates.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] I. The vertical multi-leg self-limiting detection head of this utility model is a self-stabilizing and limiting detection structure composed of a downward positioning composite seat and a hardness detection head body. It can be adapted to new testing equipment or replace the hardness detection head in existing testing equipment. The downward positioning composite seat works with the hardness detection head body to achieve a double-sided vertical support and limiting effect. It is adapted to ensure that the hardness detection head body is stably pressed against the outer wall of the corresponding area of ​​the steel pipe, ensuring that the hardness detection head body is in a stable and effective testing state for a long time. This is conducive to maintaining the standard and durable effective use state of the hardness detection head body.

[0021] II. The self-coordinating upright steel pipe hardness testing device of this utility model achieves clamping, adjustment, and positioning testing of steel pipes through the cooperation of a support base, testing platform, protective frame, transparent protective plate, self-adjusting clamping mechanism, actuator, downward positioning composite seat, and hardness testing head body. This standardizes and extends the durability of the hardness testing head body. Specific advantages include:

[0022] 1. This utility model uses a support base to support the testing platform, which also prevents slippage and improves stability during support.

[0023] 2. In this utility model, the protective frame and transparent protective plate are used to protect the steel pipe during testing, which can improve the safety of the test and make it less likely for foreign objects to fly and injure people during hardness testing.

[0024] 3. In this utility model, the steel pipe is clamped and its position is adjusted by a self-adjusting clamping mechanism, which improves the stability of the steel pipe clamping and makes it less likely for the steel pipe to rotate after clamping.

[0025] 4. In this utility model, the hardness testing head body is installed by pressing down on the positioning composite seat, and the steel pipe is positioned by pressing down on the positioning composite seat. This makes the hardness testing head body less prone to shaking, slipping, sliding or misalignment, and can ensure the durable and effective performance of the hardness testing head body. Attached Figure Description

[0026] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the main structure of the vertical multi-leg self-limiting detection head in this utility model;

[0028] Figure 2 This is a schematic diagram of the main structure of the self-cooperative orthogonal steel pipe hardness testing device of this utility model;

[0029] Figure 3 This is a bottom view of the support base in this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the detection platform and the self-adjusting clamping mechanism in this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the testing platform in this utility model;

[0032] Figure 6 This is a schematic diagram of the protective frame structure in this utility model;

[0033] Figure 7 This is a schematic diagram of the structure of the lower fixing block and the T-shaped slider in this utility model;

[0034] Figure 8 This is a schematic diagram showing the connection between the clamp and the connecting block in this utility model;

[0035] Figure 9 This is a schematic diagram of the drive mechanism in this utility model;

[0036] Figure 10 This is a schematic diagram showing the usage state of the pressure positioning composite seat in this utility model;

[0037] Figure 11 This is a schematic diagram of the pressure sensor and the central connecting sleeve in this utility model;

[0038] Figure 12 This is a schematic diagram of the sloping bottom wall-mounted support leg in this utility model;

[0039] Figure 13 This is a schematic diagram of the hardness testing head body in this utility model.

[0040] In the diagram: 1-Support base; 2-Testing table body; 3-Protective frame body; 4-Transparent protective plate; 5-Self-adjusting clamping mechanism; 6-Actuator; 7-Pressing positioning composite seat body; 8-Hardness testing head body; 9-Steel pipe;

[0041] 1-1-Trench body; 1-2-Anti-slip rubber pad; 1-3-Anti-slip groove;

[0042] 2-1-Inverted T-shaped slide groove; 2-2-Adjustable mounting groove;

[0043] 5-1-Lower fixed block; 5-2-T-shaped slider; 5-3-Support ball; 5-4-Drive mechanism; 5-5-Clamping device; 5-6-Connecting block; 5-7-Upper fixed block; 5-8-Guide rod; 5-9-Guide block;

[0044] 5-11-V-shaped fixing groove;

[0045] 5-41-Bearing housing; 5-42-Lead screw; 5-43-Lead screw nut; 5-44-Drive motor; 5-45-Connecting support leg;

[0046] 5-51-Mounting plate;

[0047] 7-1-Pressure sensor; 7-2-Centered connecting sleeve; 7-3-Positioning seat; 7-4-Positioning guide rod; 7-5-Reset spring; 7-6-Slanted bottom wall-mounted support; 7-7-Limit block;

[0048] 7-21-Installation threaded hole;

[0049] 8-1-Connecting threaded rod. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. The structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0051] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0052] Specific implementation method one: Combining Figure 1 , Figure 10 , Figure 11 , Figure 12 and Figure 13This embodiment describes a vertical multi-leg self-limiting detection head, which includes a pressure positioning composite seat 7 and a hardness detection head body 8. The pressure positioning composite seat 7 includes a pressure sensor 7-1, a central connecting sleeve 7-2, and two self-adjusting support limiting units. The hardness detection head body 8 is inserted into the central connecting sleeve 7-2. The pressure sensor 7-1 is located at the upper end of the hardness detection head body 8, and the lower end of the hardness detection head body 8 is the detection end. Two self-adjusting support limiting units are arranged side by side on the outer wall of the central connecting sleeve 7-2. Each self-adjusting support... The support and limiting unit includes a positioning seat 7-3, a positioning guide rod 7-4, a return spring 7-5, a sloping bottom wall-mounted support leg 7-6, and a limiting block 7-7. The positioning seat 7-3 is set on the outer wall of the central connecting sleeve 7-2. The positioning guide rod 7-4 is vertically inserted through the positioning seat 7-3. The upper end of the positioning guide rod 7-4 is provided with a limiting block 7-7. The lower end of the positioning guide rod 7-4 is provided with a sloping bottom wall-mounted support leg 7-6. The return spring 7-5 is fitted on the positioning guide rod 7-4. The return spring 7-5 is located between the sloping bottom wall-mounted support leg 7-6 and the positioning seat 7-3.

[0053] Furthermore, in combination Figure 1 As shown, the inclined bottom wall-mounted support 7-6 is a triangular block. The bottom surface of the triangular block is an inclined plane or an outwardly convex arc surface, which is used to fit tightly against the outer wall of the steel pipe 9. The inclined plane or outwardly convex arc surface is configured with different specifications according to the corresponding shape, and the configuration is limited according to specific requirements.

[0054] Furthermore, when the bottom surface of the triangular block is a convex arc surface, a flexible elastic rubber layer is applied to the outside of the convex arc surface, which can be replaced and is used to improve the connection strength against the outer wall of the steel pipe 9.

[0055] Specific Implementation Method Two: Combining Figures 1 to 13 The following describes a specific embodiment of the self-coordinating, aligning steel pipe hardness testing device, comprising a support base 1, a testing platform 2, a protective frame 3, a transparent protective plate 4, an actuator 6, a vertical multi-legged self-limiting testing head, and two self-adjusting clamping mechanisms 5. The support base 1 is fixedly installed on both sides of the bottom of the testing platform 2. The protective frame 3 is installed at the upper end of the testing platform 2, and the transparent protective plate 4 is hinged to the front side of the protective frame 3. The two self-adjusting clamping mechanisms 5 are vertically arranged side-by-side on the testing platform 2. The actuator 6 is installed on the inner top wall of the protective frame 3, and the vertical multi-legged self-limiting testing head is installed at the lower end of the actuator 6, positioned between the two self-adjusting clamping mechanisms 5. The two self-adjusting clamping mechanisms 5 and the vertical multi-legged self-limiting testing head are all on the same horizontal central axis, thus enabling coordinated operation along the axial direction of the steel pipe 9.

[0056] In this embodiment, the self-coordinating upright steel pipe hardness testing device achieves protection during testing through a protective frame 3 and a transparent protective plate 4, and clamps the steel pipe 9 through a self-adjusting clamping mechanism 5. This specific embodiment adopts the following technical solution: it includes a support base 1, a testing platform 2, a protective frame 3, a transparent protective plate 4, and a self-adjusting clamping mechanism 5; the support base 1 is fixedly installed on both sides of the bottom of the testing platform 2, providing protective support for the testing platform 2. A concave inverted T-shaped groove 2-1 is provided on the upper surface of the testing platform 2, allowing the self-adjusting clamping mechanism 5 to slide within a limited range. A concave adjusting mounting groove 2-2 is provided in the center of the bottom of the inverted T-shaped groove 2-1, allowing the self-adjusting clamping mechanism 5 to... The self-adjusting clamping mechanism 5 is now installed. A protective frame 3 is welded to the upper end face of the testing platform 2. The protective frame 3 is a rectangular frame with an opening at the bottom and front end. The bottom of the protective frame 3 is welded to the inner edge of the upper end face of the testing platform 2. A transparent protective plate 4 is installed on the front side of the protective frame 3 via a hinge. The protective frame 3 and the transparent protective plate 4 can protect the steel pipe 9 during testing. At the same time, a door lock is installed on the transparent protective plate 4. During testing, the door lock can close the transparent protective plate 4. Two self-adjusting clamping mechanisms 5 are symmetrically installed on the testing platform 2 by bolts. The two self-adjusting clamping mechanisms 5 can clamp the steel pipe 9, making it difficult for the steel pipe 9 to rotate during testing, and can also adjust the fixed position of the steel pipe 9.

[0057] Combination Figures 1 to 13 The illustration shows this specific embodiment. In this embodiment, the downward positioning composite seat 7 enables the installation of the hardness testing head body 8 and facilitates positioning, thereby improving the stability of the hardness testing head body 8. The specific technical solution adopted is as follows: it includes an actuator 6, a downward positioning composite seat 7, and a hardness testing head body 8. The actuator 6 is fixedly installed in the middle of the upper inner part of the protective frame 3. The downward positioning composite seat 7 is fixedly installed at the lower end of the rod of the actuator 6. The lower end of the downward positioning composite seat 7 is connected to the hardness testing head body 8 via a thread. The actuator 6 can drive the downward positioning composite seat 7 to descend, and the downward positioning composite seat 7 can achieve positioning. The actuator 6 is an existing telescopic actuator used to provide vertical load application for the vertical multi-leg self-limiting testing head, and its working principle is consistent with that of existing actuators.

[0058] Furthermore, actuator 6 can also be an existing electric push rod, pneumatic cylinder, or hydraulic cylinder, used to generate a vertical force after being vertically fixed, and apply it to the vertical multi-leg self-limiting detection head, so as to cooperate with the vertical multi-leg self-limiting detection head to perform a vertical descent or descent movement with its own load.

[0059] In this specific embodiment, the testing platform 2 is supported by the support base 1 to achieve anti-slip support. When testing is required, the transparent protective plate 4 is opened, and then the steel pipe 9 is clamped by two self-adjusting clamping mechanisms 5, so that the steel pipe 9 is not easy to rotate after being fixed. During testing, the actuator 6 drives the downward positioning composite seat 7 to descend. At this time, the downward positioning composite seat 7 can realize the positioning of the steel pipe 9. The hardness detection head body 8 installed at the bottom of the downward positioning composite seat 7 realizes the hardness detection of the steel pipe 9. When the steel pipe 9 is clamped and positioned, the hardness detection head body 8 is not easy to shake or shift, which can extend the service life of the hardness detection head body 8.

[0060] Specific implementation method three: Combining Figure 3 The following describes this specific embodiment, which is a further limitation of the second specific embodiment. In this specific embodiment, the anti-slip support is achieved through the support base 1, and the specific technical solution is as follows: the bottom of the support base 1 is provided with several concave grooves 1-1, and an anti-slip rubber pad 1-2 is fixedly installed in the grooves 1-1. The anti-slip rubber pad 1-2 can achieve anti-slip, and the bottom of the anti-slip rubber pad 1-2 protrudes from the bottom of the support base 1. The bottom of the anti-slip rubber pad 1-2 is provided with several concave anti-slip grooves 1-3.

[0061] In this specific embodiment, the support base 1 provides support, and the anti-slip rubber pads 1-2 enhance the stability of the support during operation.

[0062] Specific implementation method four: Combination Figure 4 , Figure 7 , Figure 8 and Figure 9The illustration shows this specific embodiment, which is a further limitation of embodiment two or three. This specific embodiment uses a self-adjusting clamping mechanism 5 to adjust the fixed position and clamp the steel pipe 9. The specific technical solution is as follows: The self-adjusting clamping mechanism 5 includes a lower fixing block 5-1, a T-shaped slider 5-2, a support ball 5-3, a drive mechanism 5-4, a clamping device 5-5, a connecting block 5-6, an upper fixing block 5-7, a guide rod 5-8, and a guide block 5-9; the bottom of the lower fixing block 5-1 is fixedly equipped with a T-shaped slider 5-2, T... The T-shaped slider 5-2 is slidably connected within the inverted T-shaped groove 2-1. The T-shaped slider 5-2 can slide within the inverted T-shaped groove 2-1. Mounting holes are provided on both sides of the bottom of the T-shaped slider 5-2, and support balls 5-3 are installed in the mounting holes. The support balls 5-3 improve stability during support. The lowest point of the outer wall of the support balls 5-3 contacts the bottom of the inverted T-shaped groove 2-1. The drive mechanism 5-4 is bolted into the adjusting mounting slot 2-2, and the drive mechanism 5-4 drives the T-shaped slider 5-2. The bottom of the T-shaped slider 5-2... The lower fixing block 5-1 is connected to the drive mechanism 5-4 by bolts. Clamping devices 5-5 are fixedly installed on both the front and rear ends of the lower fixing block 5-1. The upper end of the clamping device 5-5's rod is fixedly connected to the bottom of the connecting block 5-6. The connecting block 5-6 is welded to the upper fixing block 5-7. A guide block 5-9 is provided on each side of the top of the lower fixing block 5-1. A through guide hole is provided on each guide block 5-9, and a guide rod 5-8 is slidably connected within the guide hole. The upper ends of both guide rods 5-8 are fixedly connected to the bottom of the connecting block 5-6. When the steel pipe 9 is fixed, it is... The clamping device 5-5 drives the upper fixing block 5-7 to descend, thereby clamping the steel pipe 9 between the upper fixing block 5-7 and the lower fixing block 5-1. Both the upper end face of the lower fixing block 5-1 and the bottom of the upper fixing block 5-7 are provided with concave V-shaped fixing grooves 5-11. The V-shaped fixing grooves 5-11 can contact the steel pipe 9, facilitating its fixation. Furthermore, to improve anti-slip properties, the V-shaped fixing grooves 5-11 are treated with anti-slip material. The driving mechanism 5-4 includes a bearing seat 5-41, a lead screw 5-42, a lead screw nut 5-43, and a drive motor 5-44.Bearings are fixedly installed in the mounting holes of two bearing seats 5-41. The two ends of the lead screw 5-42 are respectively fixedly installed on the inner rings of the bearings in the two bearing seats 5-41. The lead screw 5-42 is connected to the lead screw nut 5-43 via threads. Two connecting feet 5-45 are provided on the upper end face of the lead screw nut 5-43. The drive motor 5-44 is bolted to the outer wall of one bearing seat 5-41. The shaft of the drive motor 5-44 is fixedly connected to one end of the lead screw 5-42 via a bushing. The two connecting feet 5-45 of the lead screw nut 5-43 are bolted to the T-shaped slider 5-2. The drive motor 5-44 drives the lead screw 5-42, facilitating the left and right movement of the T-shaped slider 5-2. Mounting plates 5-51 are symmetrically fixedly installed on the housing of the clamp 5-5. Mounting plates 5-51 have mounting through holes, allowing the clamp 5-5 to be installed.

[0063] In this specific embodiment, the screw 5-4 is fixed in the adjustment mounting groove 2-2 by the drive mechanism 5-4. The screw nut 5-43 is connected to the T-shaped slider 5-2. The drive motor 5-44 drives the screw 5-42 to rotate. When the screw 5-42 rotates, it can realize the left and right movement of the T-shaped slider 5-2. When the T-shaped slider 5-2 moves left and right, it is supported on the inverted T-shaped slide groove 2-1 by the support ball 5-3, which can improve the stability of the T-shaped slider 5-2. At the same time, when the steel pipe 9 is fixed, the steel pipe 9 is placed on the lower fixed block 5-1. At this time, the clamp 5-5 drives the upper fixed block 5-7 to descend, and the steel pipe 9 is clamped by the upper fixed block 5-7. When the clamp 5-5 drives the upper fixed block 5-7 to descend, it is guided by the guide rod 5-8 in the guide block 5-9, which can improve the stability of the upper fixed block 5-7.

[0064] Specific Implementation Method Five: Combining Figure 10 , Figure 11 and Figure 12The illustration shows this specific embodiment, which is a further limitation of specific embodiments two, three, or four. In this specific embodiment, the positioning of the steel pipe 9 and the installation of the hardness testing head body 8 are achieved by pressing down the positioning composite seat 7. The specific technical solution adopted is as follows: The pressing down positioning composite seat 7 includes a pressure sensor 7-1, a central connecting sleeve 7-2, a positioning seat 7-3, a positioning guide rod 7-4, a return spring 7-5, a slanted bottom wall-mounted support 7-6, and a limiting block 7-7; the pressure sensor 7-1 is fixedly installed at the upper end of the central connecting sleeve 7-2, which can realize pressure detection, facilitating the detection of hardness data; the bottom of the central connecting sleeve 7-2 has a concave mounting threaded hole 7-21. The hardness testing head body 8 can be installed in the mounting threaded hole 7-21. Positioning seats 7-3 are fixedly installed on the front and rear side walls of the central connecting sleeve 7-2. The positioning seats 7-3 have guide holes. The positioning guide rod 7-4 is slidably connected in the guide hole of the positioning seat 7-3. The top of the positioning guide rod 7-4 is fixedly installed with a limit block 7-7. The bottom of the positioning guide rod 7-4 is fixedly installed with a sloping bottom wall-mounted support leg 7-6. The lower side of the positioning guide rod 7-4 is sleeved with a return spring 7-5. The two sloping bottom wall-mounted supports 7-6 can realize the positioning of the steel pipe 9. When the sloping bottom wall-mounted supports 7-6 are under force, the positioning guide rod 7-4 moves upward under force. At this time, the return spring 7-5 is compressed under force. The sloping bottom wall-mounted supports 7-6 are triangular sloping bottom wall-mounted supports.

[0065] In this specific embodiment, the hardness testing head body 8 is installed through the central connecting sleeve 7-2. At this time, the actuator 6 drives the lower positioning composite seat 7 to descend, and the two inclined bottom wall-mounted supports 7-6 come into contact with the outer wall of the steel pipe 9. When the inclined bottom wall-mounted supports 7-6 are under force, the positioning guide rod 7-4 is under force and rises. At this time, the positioning guide rod 7-4 is guided inside the inclined bottom wall-mounted supports 7-6, which can improve the stability during the rise. The return spring 7-5 is compressed. When the test is completed, when the actuator 6 drives the lower positioning composite seat 7 to rise, the return spring 7-5 returns to its original position. After using the two inclined bottom wall-mounted supports 7-6 to position the steel pipe 9, the hardness testing head body 8 is less prone to shaking and displacement, which can extend its service life.

[0066] Specific Implementation Method Six: Combination Figure 13 The illustration shows the specific embodiment of this invention. The hardness testing head body 8 of this specific embodiment is easy to install and disassemble. A connecting threaded rod 8-1 is fixedly connected to the middle of the upper end of the hardness testing head body 8. The installation and disassembly of the hardness testing head body 8 are realized through the connecting threaded rod 8-1.

[0067] Work process:

[0068] The steel pipe 9 of the corresponding specification to be tested is installed between two self-adjusting clamping mechanisms 5, ensuring that the area to be tested of the steel pipe 9 faces the vertical multi-leg self-limiting detection head. The vertical multi-leg self-limiting detection head moves down to the predetermined position for pressure testing when the actuator 6 is activated. The hardness detection head body 8 is in the predetermined accurate position with the positioning support of the downward positioning composite seat 7, without any deviation or slippage, which is conducive to collecting accurate hardness data and improving the accuracy of the test. When the test of one predetermined position is completed, the vertical multi-leg self-limiting detection head rises, and the self-adjusting clamping mechanism 5 performs the clamping operation. After adjusting the position of the steel pipe 9 between the two self-adjusting clamping mechanisms 5, ensuring that the next area to be tested of the steel pipe 9 faces the vertical multi-leg self-limiting detection head, the self-adjusting clamping mechanism 5 is operated to clamp and position the steel pipe 9. Then the vertical multi-leg self-limiting detection head is activated to perform close testing on the predetermined test position it faces.

Claims

1. A vertical multi-leg self-limiting detection head, characterized in that: The device includes a pressure positioning composite seat (7) and a hardness testing head body (8). The pressure positioning composite seat (7) includes a pressure sensor (7-1), a central connecting sleeve (7-2), and two self-adjusting support limiting units. The hardness testing head body (8) is inserted inside the central connecting sleeve (7-2). The pressure sensor (7-1) is installed at the upper end of the hardness testing head body (8), and the lower end of the hardness testing head body (8) is the testing end. Two self-adjusting support limiting units are arranged side by side on the outer wall of the central connecting sleeve (7-2). Each self-adjusting support limiting unit includes a positioning seat (7-3) and a positioning guide. The positioning guide rod (7-4), the return spring (7-5), the inclined bottom wall-mounted support (7-6), and the limiting block (7-7) are arranged on the outer wall of the central connecting sleeve (7-2). The positioning guide rod (7-4) is vertically inserted on the positioning seat (7-3). The upper end of the positioning guide rod (7-4) is provided with the limiting block (7-7). The lower end of the positioning guide rod (7-4) is provided with the inclined bottom wall-mounted support (7-6). The return spring (7-5) is fitted on the positioning guide rod (7-4). The return spring (7-5) is located between the inclined bottom wall-mounted support (7-6) and the positioning seat (7-3).

2. The vertical multi-leg self-limiting detection head according to claim 1, characterized in that: The sloping bottom wall-mounted support (7-6) is a triangular block, and the bottom surface of the triangular block is an inclined surface or an outwardly convex arc surface.

3. A self-cooperative, positive-positioning steel pipe hardness testing device, comprising a vertical multi-leg self-limiting testing head as described in claim 1 or 2, characterized in that: It includes a support base (1), a testing platform (2), a protective frame (3), a transparent protective plate (4), an actuator (6), a vertical multi-leg self-limiting detection head, and two self-adjusting clamping mechanisms (5); the support base (1) is fixedly installed on both sides of the bottom of the testing platform (2), the protective frame (3) is provided at the upper end of the testing platform (2), the transparent protective plate (4) is hinged to the front side of the protective frame (3), the two self-adjusting clamping mechanisms (5) are vertically arranged side by side on the testing platform (2), the actuator (6) is provided on the top inner wall of the protective frame (3), the vertical multi-leg self-limiting detection head is provided at the lower end of the actuator (6), and the vertical multi-leg self-limiting detection head is located between the two self-adjusting clamping mechanisms (5); The vertical multi-leg self-limiting detection head includes a pressure positioning composite seat (7) and a hardness detection head body (8). The pressure positioning composite seat (7) includes a pressure sensor (7-1), a central connecting sleeve (7-2), and two self-adjusting support limiting units. The hardness detection head body (8) is inserted into the central connecting sleeve (7-2). The pressure sensor (7-1) is installed at the upper end of the hardness detection head body (8), and the lower end of the hardness detection head body (8) is the detection end. Two self-adjusting support limiting units are arranged side by side on the outer wall of the central connecting sleeve (7-2). Each self-adjusting support limiting unit includes a positioning seat (7-1). 3) Positioning guide rod (7-4), return spring (7-5), inclined bottom wall-mounted support foot (7-6) and limiting block (7-7), positioning seat (7-3) is set on the outer wall of the central connecting sleeve (7-2), positioning guide rod (7-4) is vertically inserted on positioning seat (7-3), limiting block (7-7) is set at the upper end of positioning guide rod (7-4), inclined bottom wall-mounted support foot (7-6) is set at the lower end of positioning guide rod (7-4), return spring (7-5) is fitted on positioning guide rod (7-4), and return spring (7-5) is set between inclined bottom wall-mounted support foot (7-6) and positioning seat (7-3).

4. The self-cooperative positive positioning steel pipe hardness testing device according to claim 3, characterized in that: The bottom of the support base (1) has several recessed grooves (1-1), and an anti-slip rubber pad (1-2) is fixedly installed in the groove (1-1). The bottom of the anti-slip rubber pad (1-2) protrudes from the bottom of the support base (1), and the bottom of the anti-slip rubber pad (1-2) has several recessed anti-slip grooves (1-3).

5. The self-cooperative positive positioning steel pipe hardness testing device according to claim 3, characterized in that: The upper end face of the testing platform (2) is provided with a concave inverted T-shaped slide groove (2-1), and the bottom center of the inverted T-shaped slide groove (2-1) is provided with a concave adjustment and installation groove (2-2).

6. The self-cooperative positive positioning steel pipe hardness testing device according to claim 3, characterized in that: The protective frame (3) is a rectangular frame with openings at the bottom and front end. The bottom of the protective frame (3) is welded to the inner edge of the upper surface of the testing platform (2).

7. The self-cooperative positive positioning steel pipe hardness testing device according to claim 3, 4, 5 or 6, characterized in that: The self-adjusting clamping mechanism (5) includes a lower fixed block (5-1), a T-shaped slider (5-2), a support ball (5-3), a drive mechanism (5-4), a clamp (5-5), a connecting block (5-6), an upper fixed block (5-7), a guide rod (5-8), and a guide block (5-9). A T-shaped slider (5-2) is fixedly installed at the bottom of the lower fixed block (5-1). The T-shaped slider (5-2) is slidably connected within an inverted T-shaped groove (2-1). Mounting holes are provided on both sides of the bottom of the T-shaped slider (5-2), and support balls (5-3) are installed within these holes. The lowest point of the outer wall of the support ball (5-3) contacts the bottom of the inverted T-shaped groove (2-1). The drive mechanism (5-4)... The T-shaped slider (5-2) is installed in the adjustment mounting groove (2-2) by bolts. The bottom center of the T-shaped slider (5-2) is connected to the drive mechanism (5-4) by bolts. Clamps (5-5) are fixedly installed on the front and rear ends of the lower fixed block (5-1). The upper end of the rod of the clamp (5-5) is fixedly connected to the bottom of the connecting block (5-6). The connecting block (5-6) is welded to the upper fixed block (5-7). A guide block (5-9) is provided on each side of the top of the lower fixed block (5-1). Each guide block (5-9) has a guide hole that runs through it. The guide rod (5-8) is slidably connected in the guide hole. The upper ends of the two guide rods (5-8) are fixedly connected to the bottom of the connecting block (5-6).

8. The self-cooperative positive positioning steel pipe hardness testing device according to claim 7, characterized in that: The upper end face of the lower fixing block (5-1) and the bottom of the upper fixing block (5-7) are both provided with concave V-shaped fixing grooves (5-11).

9. The self-cooperative positive positioning steel pipe hardness testing device according to claim 8, characterized in that: The drive mechanism (5-4) includes a bearing housing (5-41), a lead screw (5-42), a lead screw nut (5-43), and a drive motor (5-44). Bearings are fixedly installed in the mounting holes of the two bearing housings (5-41). The two ends of the lead screw (5-42) are respectively fixedly installed on the inner rings of the bearings of the two bearing housings (5-41). The lead screw (5-42) is connected to the lead screw nut (5-43) by threads. The upper end face of the lead screw nut (5-43) is provided with two connecting feet (5-45). The drive motor (5-44) is installed on the outer wall of one bearing housing (5-41) by bolts. The shaft of the drive motor (5-44) is fixedly connected to one end of the lead screw (5-42) by a bushing.

10. The self-cooperative positive positioning steel pipe hardness testing device according to claim 7, characterized in that: The clamp (5-5) has mounting plates (5-51) symmetrically fixedly installed on its housing, and mounting plates (5-51) have mounting through holes.

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