A device for detecting the hardness of metal pipes

Abstract

The present invention relates to the technical field of metal pipeline detection, and specifically relates to a device for detecting the hardness of metal pipelines, including a protective shell. At the left end inside the protective shell, a movable frame is rotatably installed. At the right end of the movable frame, a connecting shaft is fixedly installed. Inside the protective shell, there is a grip that is convenient for the operator to hold. At the inner end of the protective shell, a wave tooth is rotatably installed. An inner retaining ring is sleeved at the inner end of the wave tooth. At the inner end of the inner retaining ring, a plurality of emission tubes are fixedly installed. Inside each emission tube, a test needle for impacting and detecting the metal is slidably installed. At the upper end of the grip, a charging tube is fixedly installed. Inside the charging tube, a firing pin is slidably installed. Inside the grip, a filling device for weighting the test needle is provided. The device of the present invention is small and portable, and can be detected at any location without moving the metal pipeline to the laboratory, which is especially suitable for detecting at construction sites, production workshops or remote sites, saving time and cost.

Description

Technical Field

[0001] The present invention relates to the technical field of metal pipeline detection, and specifically provides a device for detecting the hardness of metal pipelines. Background Art

[0002] In modern industry, metal pipelines are widely used in fields such as oil, natural gas, chemical engineering, and construction for transporting liquids, gases, and other fluid media. The safety and reliability of the pipeline system are directly related to the operating efficiency and safety of the entire project. Therefore, quality control of metal pipelines is particularly important, and hardness detection is one of the important means to evaluate the material properties of pipelines.

[0003] After retrieval, it is found that the prior art with the publication number CN217638485U discloses a hardness detection device for pipeline production, including a right side plate, a left side plate, and an annular detection unit; the left side plate is detachably fixed to the right side plate; the annular detection unit is provided on the left side plate; the annular detection unit includes a slide rail, a slider, and a telescopic extension plate; slide rails are fixedly connected to both the right side plate and the left side plate; the slider is snap-fitted and slidably connected to the slide rail; in this solution, an elastic member is used to clamp the metal hardness tester between the fixed blocks, thereby realizing the function of fixing the metal hardness tester. At the same time, with the sliding cooperation of the slide rail and the slider, the metal hardness tester can be driven to rotate 360 degrees around the pipeline for detection, thus ensuring the measurement accuracy. At the same time, by rotating three threaded posts, the contact distance with the outer wall of the pipeline can be adjusted to be the same, making the right side plate and the left side plate coaxial with the pipeline and ensuring the accuracy of circumferential measurement of the pipeline hardness.

[0004] Therefore, based on the above retrieval and in combination with the existing technology, in the above solution, the metal steel pipe to be detected needs to be moved to a specified position before it can be detected. Then, during the process of moving the steel pipe, the pipeline may be physically damaged, such as surface scratches, deformation, or even internal structure damage. For very large or heavy steel pipes, moving them may be very difficult, which further increases the complexity and time of the operation. For this reason, we propose a device for detecting the hardness of metal pipelines. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for detecting the hardness of metal pipelines to solve the problems raised in the above background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting the hardness of a metal pipe, comprising a protective shell, a movable frame is rotatably installed on the inner left end of the protective shell, a connecting shaft is fixedly installed on the right end of the movable frame, a handle for easy grasping by an operator is arranged inside the protective shell, a driving motor is fixedly installed on the end of the handle close to the connecting shaft, and the connecting shaft sleeve is arranged on the outer surface of the driving motor, a wavy tooth is rotatably installed on the inner end of the protective shell, the wavy tooth is located on the right side of the movable frame, and an inner clamping ring is sleeved on the inner end of the wavy tooth, a plurality of launching tubes are fixedly installed on the inner end of the inner clamping ring, and test needles for impact detection of metal are slidably installed inside the launching tubes, a power storage tube is fixedly installed on the upper end of the handle, a striker is slidably installed inside the power storage tube, and a filling device for weighting the test needle is arranged inside the handle.

[0007] As a further solution of the present invention, a stabilizing ring is provided on the threaded sleeve at the left end of the movable frame, a through hole is opened at the center of the stabilizing ring, a stabilizing rod is passed through the through hole, and a tray is fixedly installed on the end of the stabilizing rod away from the stabilizing ring, so as to confirm the impact distance, thereby realizing the confirmation of the initial acceleration distance when testing the hardness.

[0008] As a further solution of the present invention, a plurality of folding rods are rotatably installed on the outer surface of the connecting shaft, and the ends of the folding rods away from the connecting shaft are rotatably connected to the outer surface of the test needle, a resistance spring is fixedly installed on the inner left end of the test needle, and the interior of the test needle is filled with a counterweight block, which can further add counterweight to the test needle to further confirm the force required for impact, and the counterweight block is located on the right side of the resistance spring, and a feed hole is opened at the right end of the test needle, and the counterweight block enters into the interior of the test needle from the feed hole.

[0009] As a further solution of the present invention, the firing pin is connected to the force storage tube through a force storage spring, and the firing pin and the test pin are on the same axis. A force column is fixedly installed on the upper end of the firing pin, and the outer surface of the force column is located at the trough of the wave tooth. When the wave tooth rotates, the firing pin is pushed to the right through the force column and the force storage spring is compressed.

[0010] As a further solution of the present invention, the filling device includes a stabilizing plate, which is slidably mounted on the inner upper end of the handle, and the upper end of the stabilizing plate is sleeved with a snap-in disk, and a lift piece is rotatably mounted on the inner end of the stabilizing plate, and the upper end of the lift piece is fixedly connected to the snap-in disk.

[0011] As a further solution of the present invention, a charging push rod is fixedly installed at the upper end inside the grip. The telescopic end of the charging push rod is fixedly connected to a connecting rod. A pushing block is slidably installed at the left end of the stabilizing plate. A sliding hole is formed on the outer surface of the stabilizing plate, and the end of the connecting rod away from the charging push rod passes through the sliding hole and is fixedly connected to the pushing block, so as to realize the recycling of the test needle after it is ejected.

[0012] As a further solution of the present invention, a circular groove is formed at the upper end inside the grip. A contact rod is slidably installed in the sliding groove. The right end of the contact rod is rotatably installed with a lever, and the lever is located on the right side of the grip.

[0013] As a further solution of the present invention, a force-receiving opening is formed at the left end of the wave teeth. A connecting strip is fixedly installed at one end of the movable frame close to the wave teeth, and the connecting strip is inserted into the force-receiving opening. A passive groove is formed on the outer surface of the inner snap ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The device of the present invention is small and portable, and can be tested at any location without moving the metal pipe to the laboratory, which is especially suitable for testing at construction sites, production workshops or remote sites, saving time and cost;

[0016] 2. When the present invention is in use, by gradually increasing the weight of the test needle, the depth and shape of the groove can be gradually changed, so as to more accurately reflect the subtle differences of different hardness grades, and can help observe the reaction of the metal under different stress levels. In this way, information on the yield strength and toughness of the material can be obtained, which is useful for understanding the overall performance of the material and evaluating the stress. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a device for detecting the hardness of a metal pipe;

[0018] Figure 2 It is a schematic structural diagram inside the protective shell;

[0019] Figure 3 It is an enlarged schematic structural diagram inside the protective shell;

[0020] Figure 4 It is an exploded view of the movable frame;

[0021] Figure 5 It is a schematic structural diagram of the protective shell and the grip;

[0022] Figure 6 It is a schematic structural diagram of the grip;

[0023] Figure 7It is a schematic diagram of the internal structure of the test needle;

[0024] Figure 8 This is a schematic diagram of the internal structure of the grip;

[0025] Figure 9 This is a schematic diagram of the enlarged structure inside the grip;

[0026] Figure 10 is a schematic diagram of the structure of the filling device;

[0027] Figure 11 It is a cross-sectional view of the connecting strip and the wavy teeth.

[0028] In the figure: 1, protective shell; 2, test pin; 3, grip; 101, movable frame; 102, tray; 103, stabilizing ring; 104, connecting shaft; 105, driving motor; 106, connecting strip; 107, force-bearing port; 108, inner clamping ring; 109, wave teeth; 110, connecting piece; 111, stabilizing rod;

[0029] 21. Resistance spring; 22. Counterweight; 23. Feeding hole; 24. Laser scanning head; 201. Launch tube; 202. Folding rod; 301. Power storage tube; 302. Strike pin; 303. Power storage spring; 304. Filling electric push rod; 305. Abutment head; 306. Pushing electric push rod; 307. Stabilizing plate; 308. Connecting rod; 309. Abutment rod; 310. Crank rod;

[0030] 401, card receiving plate; 402, force spring; 403, push block; 404, lift piece; 405, return spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1 to 4 A device for detecting the hardness of a metal pipe comprises a protective shell 1, a movable frame 101 is rotatably mounted on the left inner end of the protective shell 1, a connecting shaft 104 is fixedly mounted on the right end of the movable frame 101, a handle 3 is arranged inside the protective shell 1 for easy grasping by an operator, a driving motor 105 is fixedly mounted on one end of the handle 3 close to the connecting shaft 104, and the connecting shaft 104 is sleeved on the outer surface of the driving motor 105 (such as Figure 4As shown in the figure, specifically, a sleeve is fixedly installed at the output end of the drive motor 105. One end of the movable frame 101 close to the drive motor 105 is fixedly installed with a connecting member 110, and the sleeve is sleeved on the outer surface of the connecting member 110. More specifically, a rectangular chute is provided on the outer surface of the connecting member 110, and a rectangular block is fixedly installed at the inner end of the sleeve. The rectangular block is arranged in the rectangular groove. Thus, while the output end of the drive motor 105 drives the movable frame 101 to rotate through the sleeve and the connecting member 110, the movable frame 101 can also move left and right.

[0033] Please refer to Figure 1 、 2 、3. A wave tooth 109 is rotatably installed at the inner end of the protective shell 1. The wave tooth 109 is located on the right side of the movable frame 101, and an inner snap ring 108 is sleeved at the inner end of the wave tooth 109. A plurality of emission tubes 201 are fixedly installed at the inner end of the inner snap ring 108. The teeth of the wave tooth 109 and the emission tubes 201 are staggered with each other. And a test needle 2 for detecting the impact on the metal is slidably installed inside each emission tube 201. The needle part of the test needle 2 is made of tungsten steel. Tungsten steel has extremely high hardness, can maintain its shape and sharpness during long-term use, is not easy to wear, and the test needles 2 are increased step by step with a standard unit of weight. A power storage tube 301 is fixedly welded to the upper end of the grip 3. A firing pin 302 is slidably installed inside the power storage tube 301. A filling device for weighting the test needles 2 is arranged inside the grip 3.

[0034] A display terminal (not shown in the figure) is fixedly installed at the front end of the grip 3. The display terminal contains a calculation unit and a storage unit for calculating the hardness detection data in real time. Specifically, a switch is fixedly installed on the outer surface of the grip 3. The switch is electrically connected to the display terminal through a signal wire, and the drive motor 105 is electrically connected to the display terminal through a wire.

[0035] Embodiment 2: Please refer to Figure 3 、 4, 5. A device for detecting the hardness of a metal pipe. Based on Example 1, a stabilizing ring 103 is threadedly sleeved on the left end of the movable frame 101. A through hole is provided at the center of the stabilizing ring 103, and a stabilizing rod 111 is inserted through the through hole. The end of the stabilizing rod 111 away from the stabilizing ring 103 is fixedly welded with a tray 102. Specifically, a snap ring is fixedly installed at the end of the movable frame 101 close to the stabilizing ring 103. The inner end of the snap ring contacts the outer surface of the stabilizing rod 111. When the stabilizing ring 103 rotates, it pushes the snap ring, thereby clamping and fixing the outer surface of the stabilizing rod 111. Subsequently, the tray 102 will contact the outer surface of the metal pipe to be detected. Then, the distance between the test needle 2 and the metal pipe to be detected is determined as a fixed distance. Subsequently, a certain initial acceleration is given to the test needle 2. Then, by only changing the weights of multiple test needles 2, the depth of the indentation caused by the impact of test needles 2 of different weights on the metal pipe can be used to judge the hardness of the metal pipe for evaluation.

[0036] The test needle 2 has an initial velocity When it impacts the metal surface, kinetic energy is the main factor causing grooves on it. The kinetic energy formula is:

[0037] Among them, is the kinetic energy (joules, J), m is the mass of the test needle 2 (kilograms, kg), is the initial velocity of the test needle 2 (meters per second, m / s). Then, by accelerating the test needle 2 and impacting the surface of the metal pipe to produce an indentation, the hardness of the metal pipe can be detected. The above calculation method is stored in the storage unit in the display terminal;

[0038] Such as Figure 5 , 6 , a plurality of folding rods 202 are rotatably installed on the outer surface of the connecting shaft 104 through bolts, and the ends of the folding rods 202 away from the connecting shaft 104 are rotatably connected to the outer surface of the test needle 2. Specifically, a rectangular hole is provided at the end of the emitting tube 201 close to the connecting shaft 104, and the end of the folding rod 202 close to the test needle 2 is arranged in the rectangular hole. More specifically, the folding parts of the folding rods 202 and the connection parts between the folding rods 202 and the connecting shaft 104 are both clamped by torsion springs. Thus, after the test needle 2 is ejected, under the action of the torsion spring, the test needle 2 is reset.

[0039] A laser scanning head 24 is fixedly installed at the left end of the grip 3. The laser scanning head 24 is electrically connected to the display terminal through a data cable for information interaction. The output end of the laser scanning head 24 faces the direction where the test needle 2 impacts. When a laser beam irradiates the surface of an object, part of the light will be reflected back to detect the depth of the indentation. The laser scanning head 24 is a mature existing technology and will not be elaborated here.

[0040] Such asFigure 7 As shown, a contact spring 21 is fixedly installed at the inner left end of the test needle 2, and a counterweight 22 is filled inside the test needle 2. The counterweight 22 is located on the right side of the contact spring 21. A feeding hole 23 is formed at the right end of the test needle 2, and the counterweight 22 enters the inside of the test needle 2 through the feeding hole 23. Specifically, chamfers are made at the edges of the counterweight 22, so that when the counterweights 22 are staggered, they are squeezed against each other through the chamfered edges, thereby enabling the counterweights 22 to be stacked. More specifically, a triangular block is fixedly installed at the inner right end of the test needle 2, and the inclined portion of the triangular block corresponds to the feeding hole 23. When the counterweight 22 enters through the feeding hole 23, its direction is changed at the inclined portion of the triangular block, and the stacking effect can be easily achieved.

[0041] As Figure 8 shown, the striker 302 is connected to the energy storage tube 301 through an energy storage spring 303, and the striker 302 and the test needle 2 are on the same axis. A force-bearing column is fixedly welded to the upper end of the striker 302. Specifically, the outer surface of the force-bearing column is located at the trough of the wave teeth 109. When the wave teeth 109 rotate, the striker 302 is pushed to move to the right by the force-bearing column and the energy storage spring 303 is compressed. Subsequently, under the action of the elastic force of the energy storage spring 303, the striker 302 is pushed towards the test needle 2 and hits the right end of the test needle 2, causing the test needle 2 to be launched.

[0042] Then the initial velocity of the test needle 2 is achieved by the elastic force of the energy storage spring 303. When the energy storage spring 303 is compressed, energy is stored, and this energy becomes elastic potential energy:

[0043] Among them, is the elastic potential energy of the energy storage spring 303 (unit: joule, J), is the elastic coefficient of the spring (unit: N / m), is the compression or elongation of the spring (unit: m);

[0044] And according to the law of conservation of energy, the elastic potential energy of the spring is converted into the kinetic energy of the test needle 2. Through the above formula, the initial velocity of the test needle 2 can be solved:

[0045] Among them, It reflects the characteristics of the system. The greater the stiffness coefficient k of the energy storage spring 303, the smaller the mass m, the greater the speed, x is the compression amount of the spring. The greater the compression amount, the greater the initial speed. When the energy storage spring 303 releases elastic kinetic energy, at this time, the test needle 2 will be affected by the reaction force of the torsion spring on the folding rod 202. Then, the final output result needs to subtract the reaction force of the torsion spring from the elastic force of the energy storage spring 303. The calculation method of the elastic potential energy of the torsion spring is the same as that of the energy storage spring 303, and there is no need to elaborate. The above calculation methods are all stored in the storage unit in the display terminal and then calculated by the calculation unit.

[0046] Please refer to Figure 8 、 9 、10, the filling device includes a stabilizing plate 307. The stabilizing plate 307 is slidably installed at the upper inner side of the grip 3. A clamping disk 401 is sleeved on the upper end of the stabilizing plate 307. Specifically, a circular groove of the same size as the clamping disk 401 is formed on the outer surface of the counterweight 22, so that the clamping disk 401 can be clamped in the circular groove. A fin 404 is rotatably installed at the inner end of the stabilizing plate 307. The upper end of the fin 404 is fixedly connected to the clamping disk 401. When the fin 404 is squeezed, the clamping disk 401 will be lifted, so that the clamping disk 401 is no longer clamped with the circular groove on the counterweight 22. The clamping disk 401 is connected to the stabilizing plate 307 through a return spring 405.

[0047] An electric filling push rod 304 is fixedly installed at the upper inner side of the grip 3. The telescopic end of the electric filling push rod 304 is fixedly connected to a connecting rod 308. A pushing block 403 is slidably installed at the left end of the stabilizing plate 307. A sliding hole is formed on the outer surface of the stabilizing plate 307, and the end of the connecting rod 308 away from the electric filling push rod 304 passes through the sliding hole and is fixedly connected to the pushing block 403. The connecting rod 308 is connected to the stabilizing plate 307 through a force-applying spring 402, and the force-applying spring 402 is located in the sliding hole.

[0048] More specifically, a chute for placing the counterweight 22 is arranged at the inner end of the grip 3. A pushing spring is fixedly installed at the bottom end of the inner side of the chute, so as to realize pushing the counterweight 22 to always keep upward. An arc-shaped groove is formed at the upper inner side of the chute. Under the action of the extrusion force, the counterweight 22 can reach the clamping disk 401. A piezoelectric push rod 306 is fixedly installed at the upper inner side of the grip 3. The output end of the piezoelectric push rod 306 is fixedly installed with an abutting head 305, and the abutting head 305 is parallel to the arc-shaped groove at the upper end of the chute.

[0049] A circular groove is provided at the inner upper end of the handle 3, and an abutment rod 309 is slidably installed in the sliding groove. A tilting rod 310 is rotatably installed on the right end of the abutment rod 309. The tilting rod 310 is located on the right side of the handle 3. When the tilting rod 310 is moved, the abutment rod 309 is pushed to move to the left under the action of the lever. Then, when the stabilizing plate 307 moves upward, the left end of the abutment rod 309 will contact the tilting piece 404, causing the tilting piece 404 to rotate, driving the clamping plate 401 to move away from the counterweight block 22. Then, as the filling electric push rod 304 continues to move, the pushing block 403 pushes the counterweight block 22 to move and pushes it into the test needle 2.

[0050] See also Figure 3 , 11 A force-bearing opening 107 is provided at the left end of the wave tooth 109, and a connecting strip 106 is fixedly installed at one end of the movable frame 101 close to the wave tooth 109, and the connecting strip 106 is passed through the force-bearing opening 107, and a passive groove is provided on the outer surface of the inner clamping ring 108. Specifically, the left end of the force-bearing opening 107 is longer than the inner clamping ring 108. When the connecting strip 106 moves to the right, the bottom end is clamped in the passive groove on the outer surface of the inner clamping ring 108, so that when the movable frame 101 rotates, the wave tooth 109 and the inner clamping ring 108 are driven to rotate at the same time through the connecting strip 106.

[0051] The working principle of the present invention is:

[0052] When in use, the tray 102 is pulled out and brought into contact with the outer surface of the metal pipe to be tested, and then the switch on the handle 3 is pressed, and then the drive motor 105 is started, and the movable frame 101 is driven to rotate through the connecting shaft 104, and the movable frame 101 drives the wavy teeth 109 and the inner clamping ring 108 to rotate through the connecting strip 106, then the striker 302 is driven to reciprocate under the action of the wavy teeth 109, and then the right end of the impact test needle 2 is launched from the launch tube 201, and then as the mass of the test needle 2 continues to increase, after hitting the outer surface of the metal pipe, any test needle 2 hits the outer surface of the metal pipe and forms a groove, it will be scanned by the laser scanning head 24, and then a command is sent to the display terminal, and the display terminal immediately disconnects the circuit with the drive motor 105 to stop it from rotating;

[0053] Subsequently, the telescopic end of the electric push rod 304 is filled and pushed to move the connecting rod 308 upward, and under the action of the biasing spring 402, the pushing block 403 and the stabilizing plate 307 are pushed upward. Then, the clamping disc 401 drives the counterweight 22 to move into the interior of the test needle 2. At the same time, the left end of the abutting rod 309 will contact the fin 404, causing the fin 404 to rotate, driving the clamping disc 401 to move away from the counterweight 22, so that the clamping disc 401 no longer engages with the counterweight 22. Along with the continuous upward movement of the connecting rod 308, the pushing block 403 continues to push the counterweight 22, thereby realizing the increase of gravity on the test needle 2;

[0054] As the gravity of the test needle 2 gradually increases, the protective shell 1 is pushed to move the movable frame 101 away from the grip 3. Then, the connecting strip 106 is no longer engaged in the passive groove on the outer surface of the inner retaining ring 108. Subsequently, the test point is changed, and the switch is pressed again, causing the drive motor 105 to start rotating. The wave teeth 109 rotate, causing the test needle 2 to continue to impact the metal pipe. Then, based on the test needle 2 of the original standard weight, along with a slight increase in the weight of the test needle 2, more accurate test data of the detected metal pipe can be obtained;

[0055] After the detection is completed, the rocker 310 is toggled to move the abutting rod 309 to the right. The telescopic end of the electric push rod 304 drives the clamping disc 401 to extend into the test needle 2 through the connecting rod 308, so that the clamping disc 401 clamps the counterweight 22. Subsequently, the counterweight 22 is brought back into the chute in the grip 3. Then, the counterweight 22 is parallel to the abutting head 305. Subsequently, the output end of the electric push rod 306 is pushed to drive the abutting head 305 to move to the left and push the counterweight 22 into the arc-shaped groove. Then, the counterweight 22 is no longer connected to the clamping disc 401 at this time, waiting for the clamping disc 401 to bring the next round of counterweight 22 into the chute and squeeze the previous round of counterweight 22 to move downward. In this way, the recycling of the counterweight 22 is realized.

[0056] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the hardness of a metal pipe, comprising a protective shell (1), characterized in that: A movable frame (101) is rotatably mounted on the left inner end of the protective shell (1), a connecting shaft (104) is fixedly mounted on the right end of the movable frame (101), a handle (3) is provided inside the protective shell (1) for easy grasping by an operator, a driving motor (105) is fixedly mounted on one end of the handle (3) close to the connecting shaft (104), and the connecting shaft (104) is sleeved on the outer surface of the driving motor (105), and a wave tooth (109) is rotatably mounted on the inner end of the protective shell (1), and the wave tooth (109) is located on the movable frame. (101), and the inner end of the wavy tooth (109) is sleeved with an inner clamping ring (108), a plurality of launch tubes (201) are fixedly mounted on the inner end of the inner clamping ring (108), and test needles (2) for metal impact detection are slidably mounted inside the launch tubes (201), a power storage tube (301) is fixedly mounted on the upper end of the grip (3), a striker (302) is slidably mounted inside the power storage tube (301), and a filling device for weighting the test needles (2) is arranged inside the grip (3); The filling device comprises a stabilizing plate (307), the stabilizing plate (307) being slidably mounted on the inner upper end of the handle (3), the upper end of the stabilizing plate (307) being sleeved with a clamping disc (401), the inner end of the stabilizing plate (307) being rotatably mounted with a tilting piece (404), the upper end of the tilting piece (404) being fixedly connected to the clamping disc (401); A filling electric push rod (304) is fixedly mounted on the inner upper end of the handle (3), and a connecting rod (308) is fixedly connected to the telescopic end of the filling electric push rod (304). A pushing block (403) is slidably mounted on the left end of the stabilizing plate (307). A sliding hole is provided on the outer surface of the stabilizing plate (307), and an end of the connecting rod (308) away from the filling electric push rod (304) passes through the sliding hole and is fixedly connected to the pushing block (403). A circular groove is provided on the inner upper end of the handle (3), and an abutting rod (309) is slidably mounted in the sliding groove. A tilting rod (310) is rotatably mounted on the right end of the abutting rod (309), and the tilting rod (310) is located on the right side of the handle (3).

2. A metal pipe hardness detection device according to claim 1, characterized in that: A stabilizing ring (103) is threadedly sleeved on the left end of the movable frame (101), a through hole is opened at the center of the stabilizing ring (103), a stabilizing rod (111) is passed through the through hole, and a tray (102) is fixedly mounted on one end of the stabilizing rod (111) away from the stabilizing ring (103).

3. A metal pipe hardness detection device according to claim 2, characterized in that: A plurality of folding rods (202) are rotatably mounted on the outer surface of the connecting shaft (104), and the ends of the folding rods (202) away from the connecting shaft (104) are rotatably connected to the outer surface of the test needle (2), a resisting spring (21) is fixedly mounted on the inner left end of the test needle (2), and a counterweight block (22) is filled inside the test needle (2).

4. A metal pipe hardness detection device according to claim 3, characterized in that: The counterweight block (22) is located on the right side of the resisting spring (21), and a material inlet hole (23) is provided at the right end of the test needle (2), and the counterweight block (22) enters into the interior of the test needle (2) through the material inlet hole (23).

5. A metal pipe hardness detection device according to claim 1, characterized in that: The striker (302) and the force storage tube (301) are connected via a force storage spring (303), and the striker (302) and the test needle (2) are located on the same axis.

6. A metal pipe hardness detection device according to claim 5, characterized in that: A force-bearing column is fixedly mounted on the upper end of the striker (302), and the outer surface of the force-bearing column is located at the trough of the wave tooth (109). When the wave tooth (109) rotates, the striker (302) is pushed to move to the right through the force-bearing column and the force storage spring (303) is compressed.

7. A metal pipe hardness detection device according to claim 1, characterized in that: A force receiving opening (107) is provided at the left end of the wave tooth (109); a connecting strip (106) is fixedly installed at one end of the movable frame (101) close to the wave tooth (109), and the connecting strip (106) is inserted into the force receiving opening (107); and a passive groove is provided on the outer surface of the inner clamping ring (108).

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