Device for detecting hardness of metal pipeline

Abstract

The invention relates to the technical field of metal pipeline detection, in particular to a metal pipeline hardness detection device which comprises a protective shell, a movable frame is rotatably mounted at the left end of the inner side of the protective shell, a connecting shaft is fixedly mounted at the right end of the movable frame, a grip convenient for an operator to hold is arranged in the protective shell, and wavy teeth are rotatably mounted at the inner end of the protective shell. The inner ends of the wave teeth are sleeved with inner clamping rings, a plurality of launching tubes are fixedly installed at the inner ends of the inner clamping rings, testing needles used for conducting impact detection on metal are slidably installed in the launching tubes, a force storage tube is fixedly installed at the upper end of the grip, and a firing pin is slidably installed in the force storage tube. The device is small and exquisite, is convenient to carry, can carry out detection at any place, does not need to move a metal pipeline to a laboratory, is especially suitable for detection at a construction site, a production workshop or a remote site, and saves time and cost.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipeline detection, in particular to a device for detecting the hardness of a metal pipeline. Background Art

[0002] In modern industry, metal pipes are widely used in petroleum, natural gas, chemical industry, construction and other fields to transport 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 pipes is particularly important, among which hardness testing is one of the important means to evaluate the performance of pipeline materials.

[0003] After searching, it was found that the prior art publication number is CN217638485U, which discloses a hardness detection device for pipeline production, including a right side plate, a left side plate and an annular detection unit; the right side plate is detachably fixed with the left side plate; the left side plate is provided with an annular detection unit; the annular detection unit includes a slide rail, a slider and a telescopic extension plate; the right side plate and the left side plate are both fixed with slide rails; the slide rail is slidably connected with a slider; the scheme uses an elastic member to enable the sliding plate to clamp the metal hardness tester between the fixed blocks, thereby realizing the function of fixing the metal hardness tester, and at the same time, the sliding cooperation of the slide rail and the slider can drive the metal hardness tester to rotate 360 ​​degrees around the pipeline for detection, thereby ensuring the measurement accuracy, and at the same time, the contact distance with the outer wall of the pipeline can be adjusted to be the same under the threaded rotation of the three threaded columns, so that the right side plate and the left side plate are coaxial with the pipeline, ensuring the accuracy of circumferential measurement of pipeline hardness.

[0004] Therefore, based on the above search and in combination with the existing technology, in the above scheme, the metal steel pipe to be tested needs to be moved to a specified position before it can be tested. In the process of moving the steel pipe, the pipe may be physically damaged, such as surface scratches, deformation, or even internal structure damage. For very large or heavy steel pipes, moving may be very difficult, which increases the complexity and time of the operation. For this reason, we propose a device for metal pipe hardness testing. Summary of the invention

[0005] The object of the present invention is to provide a device for detecting the hardness of a metal pipe to solve the problems raised in the above-mentioned background technology.

[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 filling electric push rod is fixedly installed on the inner upper end of the handle, the telescopic end of the filling electric push rod is fixedly connected to a connecting rod, a pushing block is slidably installed on the left end of the stabilizing plate, a sliding hole is provided on the outer surface of the stabilizing plate, and the end of the connecting rod away from the filling electric push rod passes through the sliding hole and is fixedly connected to the pushing block, thereby achieving the ability to recover the test needle after being ejected.

[0012] As a further solution of the present invention, a circular groove is provided at the inner upper end of the handle, an abutment rod is slidably installed in the slide groove, a tilting rod is rotatably installed at the right end of the abutment rod, and the tilting rod is located on the right side of the handle.

[0013] As a further solution of the present invention, a force-bearing opening is opened at the left end of the wave tooth, a connecting strip is fixedly installed on one end of the movable frame close to the wave tooth, and the connecting strip is passed through the force-bearing opening, and a passive groove is opened on the outer surface of the inner clamping ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The device of the present invention is small and portable, and can be used for testing at any location without moving the metal pipe to a laboratory. It is particularly suitable for testing at construction sites, production workshops or remote sites, saving time and cost. 2. When the present invention is used, by gradually increasing the weight of the test needle, the depth and shape of the groove can be gradually changed, thereby more accurately reflecting the subtle differences in different hardness levels and helping to observe the reaction of metals under different stress levels. In this way, information on the yield strength and toughness of the material can be obtained, which is helpful for understanding the overall performance of the material and evaluating the stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a device for detecting the hardness of a metal pipe; Figure 2 It is a schematic diagram of the structure inside the protective shell; Figure 3 This is a schematic diagram of the enlarged structure inside the protective shell; Figure 4 This is a disassembly diagram of the movable frame; Figure 5 This is a schematic diagram of the structure of the protective shell and the handle; Figure 6 It is a schematic diagram of the structure of the handle; Figure 7 It is a schematic diagram of the internal structure of the test needle; Figure 8 This is a schematic diagram of the internal structure of the grip; Fig. 9 This is a schematic diagram of the enlarged structure inside the grip; Fig.10 is a schematic diagram of the structure of the filling device; Fig.11 It is a cross-sectional view of the connecting strip and the wavy teeth.

[0016] 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; 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; 401, card receiving plate; 402, force spring; 403, push block; 404, lift piece; 405, return spring. DETAILED DESCRIPTION

[0017] 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.

[0018] 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 4 As shown), specifically, a sleeve is fixedly installed at the output end of the driving motor 105, a connecting piece 110 is fixedly installed at one end of the movable frame 101 close to the driving motor 105, and the sleeve is sleeved on the outer surface of the connecting piece 110. More specifically, a rectangular slide groove is opened on the outer surface of the connecting piece 110, and a rectangular block is fixedly installed at the inner end of the sleeve, and the rectangular block is arranged in the rectangular groove, so that the output end of the driving motor 105 drives the movable frame 101 to rotate through the sleeve and the connecting piece 110, and the movable frame 101 can also move left and right.

[0019] See also 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 end of the wave tooth 109 is sleeved with an inner clamping ring 108. A plurality of launching tubes 201 are fixedly installed at the inner end of the inner clamping ring 108. The teeth of the wave tooth 109 and the launching tube 201 are staggered with each other, and a test needle 2 for impact detection of metal is slidably installed inside the launching tube 201. The needle head of the test needle 2 is made of tungsten steel. The steel has extremely high hardness and can maintain its shape and sharpness during long-term use. It is not easy to wear, and the weight of the test needle 2 increases step by step with a standard unit. A power storage tube 301 is fixedly welded on the upper end of the grip 3, and a striker 302 is slidably installed inside the power storage tube 301. A filling device for weighting the test needle 2 is provided inside the grip 3.

[0020] A display terminal (not shown) is fixedly installed at the front end of the handle 3. The display terminal contains a computing 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 handle 3. The switch is electrically connected to the display terminal through a signal line, and the drive motor 105 is electrically connected to the display terminal through a wire.

[0021] Example 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 provided on a threaded sleeve at the left end of a movable frame 101. A through hole is provided at the center of the stabilizing ring 103. A stabilizing rod 111 is passed through the through hole, and a tray 102 is fixedly welded to one end of the stabilizing rod 111 away from the stabilizing ring 103. Specifically, a clamping ring is fixedly installed on one end of the movable frame 101 close to the stabilizing ring 103. The inner end of the clamping ring contacts the outer surface of the stabilizing rod 111. When the stabilizing ring 103 rotates, the clamping ring is pushed, so that the clamping ring clamps the outer surface of the stabilizing rod 111 and fixes it. Then, the tray 102 contacts the outer surface of the metal pipe to be tested, and the distance between the test needle 2 and the metal pipe to be tested is determined to be a fixed distance. Then, the initial acceleration of the test needle 2 is given to be certain. Then, it only needs to change the weight of multiple test needles 2 to achieve different depths of dents caused by the impact of test needles 2 of different weights on the metal pipe to judge the hardness of the metal pipe for evaluation.

[0022] Test pin 2 at initial speed When impacting a metal surface, kinetic energy is the main factor that causes grooves. The kinetic energy formula is:

[0023] in, is the kinetic energy (joule, J), m is the mass of the test needle 2 (kilogram, kg), is the initial speed of the test needle 2 (meters per second, m / s), then the test needle 2 is accelerated and hits the surface of the metal pipe to produce a dent, so as to detect the hardness of the metal pipe, and the above calculation method is stored in the storage unit of the display terminal; like Figure 5 , 6 A plurality of folding rods 202 are rotatably mounted 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 launching 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 part of the folding rod 202 and the connection part of the folding rod 202 and the connecting shaft 104 are clamped by a torsion spring, so that after the test needle 2 is ejected, the test needle 2 is reset under the action of the torsion spring.

[0024] A laser scanning head 24 is fixedly installed on the left end of the handle 3. The laser scanning head 24 is electrically connected to the display terminal through a data line for information exchange. The output end of the laser scanning head 24 is facing the direction hit by the test needle 2. When the laser beam is irradiated to the surface of the object, part of the light will be reflected back to detect the depth of the dent. The laser scanning head 24 is an existing mature technology and will not be elaborated here.

[0025] like Figure 7 As shown, a resistance spring 21 is fixedly installed on the inner left end of the test needle 2, and the interior of the test needle 2 is filled with a counterweight 22, which is located on the right side of the resistance spring 21. A feed hole 23 is opened at the right end of the test needle 2, and the counterweight 22 enters into the interior of the test needle 2 from the feed hole 23. Specifically, the edges of the counterweight 22 are chamfered, so that the counterweights 22 are squeezed against each other through the chamfered edges when they are staggered, thereby achieving the effect of stacking the counterweights 22. More specifically, a triangular block is fixedly installed on the inner right end of the test needle 2, and the inclined part of the triangular block corresponds to the feed hole 23, so that when the counterweight 22 enters from the feed hole 23, the direction of the counterweight 22 is changed at the inclined part of the triangular block, and the stacking effect can be easily achieved.

[0026] like Figure 8 As shown, the firing pin 302 is connected to the force storage tube 301 through the force storage spring 303, and the firing pin 302 and the test pin 2 are on the same axis. A force column is fixedly welded to the upper end of the firing pin 302. Specifically, the outer surface of the force column is located at the trough of the wave tooth 109. When the wave tooth 109 rotates, the firing pin 302 is pushed to the right through the force column and the force storage spring 303 is compressed. Then, the firing pin 302 is pushed to move in the direction of the test pin 2 under the action of the elastic force of the force storage spring 303, and hits the right end of the test pin 2, so that the test pin 2 is launched.

[0027] Then the initial speed of the test needle 2 is achieved by the elastic force of the force storage spring 303. When the force storage spring 303 is compressed, energy is stored, and the energy becomes elastic potential energy:

[0028] in, is the elastic potential energy of the storage spring 303 (unit: joule, J), is the elastic constant of the spring (unit: N / m), is the compression or extension of the spring (unit: m); According to the law of conservation of energy, the elastic potential energy of the spring is Converted into kinetic energy of test pin 2 , through the above formula, we can solve the initial speed of test needle 2 :

[0029] in, It reflects the characteristics of the system. The larger the stiffness coefficient k of the force storage spring 303, the smaller the mass m, the greater the speed, and the compression of the x-type spring. The larger the compression, the greater the initial speed. When the force storage spring 303 releases its elastic kinetic energy, 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 be the elastic force of the force storage spring 303 minus the reaction force of the torsion spring. The calculation method of the elastic potential energy of the torsion spring is the same as the calculation method of the potential energy of the force storage spring 303. It will not be elaborated on here. The above calculation methods are all stored in the storage unit in the display terminal and then calculated by the calculation unit.

[0030] See also Figure 8 , 9 10. The filling device includes a stabilizing plate 307, which is slidably mounted on the inner upper end of the handle 3. A snap-in disk 401 is sleeved on the upper end of the stabilizing plate 307. Specifically, a circular groove of the same size as the snap-in disk 401 is provided on the outer surface of the counterweight 22, so that the snap-in disk 401 can be snapped into the circular groove. A tilting piece 404 is rotatably mounted on the inner end of the stabilizing plate 307. The upper end of the tilting piece 404 is fixedly connected to the snap-in disk 401. When the tilting piece 404 is squeezed, the snap-in disk 401 is tilted up, so that the snap-in disk 401 is no longer snapped into the circular groove on the counterweight 22. The snap-in disk 401 and the stabilizing plate 307 are connected by a reset spring 405.

[0031] A filling electric push rod 304 is fixedly installed 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 installed on the left end of the stabilizing plate 307. A sliding hole is provided on the outer surface of the stabilizing plate 307, and the 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. The connecting rod 308 and the stabilizing plate 307 are connected by a force spring 402, and the force spring 402 is located in the sliding hole.

[0032] More specifically, the inner end of the handle 3 is provided with a slide groove for placing the counterweight 22, and a push spring is fixedly installed at the inner bottom end of the slide groove, so as to push the counterweight 22 to always remain upward, and an arc-shaped groove is opened at the inner upper end of the slide groove, so that the counterweight 22 can reach the clamping disk 401 under the action of the extrusion force, and a pushing electric push rod 306 is fixedly installed at the inner upper end of the handle 3, and a butt joint 305 is fixedly installed at the output end of the pushing electric push rod 306, and the butt joint 305 is parallel to the arc-shaped groove at the upper end of the slide groove.

[0033] 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.

[0034] 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.

[0035] The working principle of the present invention is: 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; Then, the telescopic end of the filling electric push rod 304 pushes the connecting rod 308 to move upward, and under the action of the force spring 402, the pushing block 403 and the stabilizing plate 307 are pushed upward, so that the clamping plate 401 drives the counterweight block 22 to move to the inside of the test needle 2. At the same time, the left end of the abutting rod 309 will contact the tilting piece 404, so that the tilting piece 404 rotates, driving the clamping plate 401 to move away from the counterweight block 22, so that the clamping plate 401 is no longer clamped with the counterweight block 22, and the connecting rod 308 continues to move upward, so that the pushing block 403 continues to push the counterweight block 22, thereby increasing the gravity of the test needle 2; As the gravity of the test needle 2 gradually increases, the protective shell 1 is pushed to make the movable frame 101 move away from the grip 3, so that the connecting strip 106 is no longer clamped in the passive groove on the outer surface of the inner clamp ring 108, and then the test point is changed, and the switch is pressed continuously, so that the drive motor 105 starts to rotate, and the wave teeth 109 rotate to make the test needle 2 continue to hit the metal pipe. Then, based on the original standard weight of the test needle 2, as the weight of the test needle 2 is slightly increased, more accurate detection data of the metal pipe to be tested can be obtained; After the detection is completed, the tilting rod 310 is pushed to make the abutment rod 309 move to the right, and the telescopic end of the filling electric push rod 304 drives the clamping plate 401 to extend into the test needle 2 through the connecting rod 308, so that the clamping plate 401 clamps the counterweight block 22, and then brings the counterweight block 22 back to the slide groove in the handle 3, and then the counterweight block 22 is parallel to the abutment joint 305, and then the output end of the electric push rod 306 is pushed to drive the abutment joint 305 to move to the left, and push the counterweight block 22 into the arc-shaped groove. Then, the counterweight block 22 is no longer connected to the clamping plate 401, waiting for the clamping plate 401 to bring the next round of counterweight blocks 22 into the slide groove, and squeeze the previous round of counterweight blocks 22 to move downward, and so on and so forth, thereby realizing the recovery of the counterweight block 22.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which 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. The right side of the handle (101) is provided with an inner clamping ring (108) at the inner end of the wavy tooth (109), 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 handle (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 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: 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 snap-on 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 snap-on disc (401).

8. A metal pipe hardness detection device according to claim 7, characterized in that: A filling push rod (304) is fixedly mounted on the inner upper end of the handle (3), a connecting rod (308) is fixedly connected to the telescopic end of the filling 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 push rod (304) passes through the sliding hole and is fixedly connected to the pushing block (403).

9. A metal pipe hardness detection device according to claim 8, characterized in that: A circular groove is provided at the inner upper end of the handle (3), and an abutment rod (309) is slidably mounted in the slide groove. A tilting rod (310) is rotatably mounted at the right end of the abutment rod (309), and the tilting rod (310) is located on the right side of the handle (3).

10. A metal pipe hardness detection device according to claim 9, 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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