A low-temperature impact test apparatus for seamless perforated steel pipes

Abstract

The application discloses a kind of seamless perforated steel pipe's low-temperature impact test equipment, belongs to test detection equipment technical field, and its one kind seamless perforated steel pipe's low-temperature impact test equipment, including support frame, the upper side middle part of the support frame is fixedly installed with cable reel, the middle part of the support frame is fixedly installed with refrigeration device, by being provided with the structure of fixed cylinder, it is directly to the steel pipe in middle part and is carried out stamping test after being reduced to experimental temperature in its inside, and after test, the entire fixed cylinder can be conveniently taken out to store and protect seamless steel pipe workpiece, effectively avoid that stamping site is deformed due to temperature difference too big, by being provided with the structure of impact head, impact head will be embedded into the inside of seamless steel pipe workpiece, when stamping head is embedded into the deeper seamless steel pipe workpiece and causes greater damage, operating personnel can take out stamping head and steel pipe together, carry out measurement, effectively avoid that damage position is further enlarged due to forced separation, cause experimental error.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test detection equipment, more particularly, to a low-temperature impact resistance test equipment for seamless perforated steel pipes. BACKGROUND

[0002] In the production and quality detection process of seamless perforated steel pipes, the low-temperature impact resistance test is an important link for evaluating the performance of the steel pipes. Through the test, the ability of the steel pipes to withstand impact in a low-temperature environment can be understood, so as to determine whether the steel pipes meet the actual use requirements. However, the existing low-temperature impact resistance test equipment for seamless perforated steel pipes has many problems to be solved.

[0003] In the low-temperature impact test, the conventional test equipment usually directly places the steel pipe in a low-temperature container. After the impact is completed, in addition to collecting basic data such as impact force and pressure using detection devices, a tool is manually used to take out the steel pipe, and then the impact position is detected, observed, and measured. However, after the steel pipe is taken out, the temperature difference is large, which easily causes unpredictable deformation of the crack. In addition, the time intervals of multiple samples for impact are different, which easily leads to inaccurate comparison. Moreover, in a low-temperature environment, the brittleness of the steel pipe significantly increases. When the impact head is separated from the steel pipe, the steel pipe is easily damaged. After the impact head is separated from the steel pipe, due to the stress concentration caused by the impact and the brittleness of the steel pipe at low temperature, the impact head may be embedded in the inside of the steel pipe, and the steel pipe surface may have crack propagation, local fragmentation, and other situations. When the impact head is separated, the impact position is damaged. These additional damages interfere with the accurate evaluation of the low-temperature impact resistance performance of the steel pipe itself, leading to deviations in experimental data. For example, the low-temperature impact resistance performance of the steel pipe is originally good, but due to the additional damage caused by the separation of the impact head, it may be erroneously concluded that the impact resistance performance of the steel pipe is poor, thereby affecting the quality judgment and actual application of the product. SUMMARY

[0004] The present application aims to provide a low-temperature impact resistance test equipment for seamless perforated steel pipes to solve the problems raised in the background.

[0005] A low-temperature impact resistance test equipment for seamless perforated steel pipes, comprising a support frame, a cable winder is fixedly installed on the upper side of the middle part of the support frame, a refrigeration device is fixedly installed on the middle part of the support frame, an installation plate is fixedly installed on the front side of the support frame, a stabilizing cylinder is arranged on the upper end of the front side of the installation plate, an impact cylinder is fixedly installed on the front side of the middle part of the installation plate, a lifting piece is arranged on the middle part of the impact cylinder, and an impact piece is arranged on the lower side of the lifting piece.

[0006] A main control device is fixedly installed on the front side of the middle of the support frame. A guide cylinder is fixedly installed on the middle of the lower end of the impact cylinder. A fixed seat is fixedly installed on the lower end of the guide cylinder. A detection cylinder is fixedly installed on the middle of the fixed seat. An impact assembly is provided in the middle of the guide cylinder. The impact assembly includes a connecting rod that is slidably disposed in the middle of the guide cylinder. An intermediate plate is fixedly installed on the upper end of the connecting rod. A fixing member is fixedly installed on the lower end of the connecting rod. A transmission member is fixedly installed on the lower side of the fixing member. A third magnetic suction plate is fixedly installed on the middle of the lower side of the transmission member. An impact head is provided on the middle of the lower side of the third magnetic suction plate.

[0007] A material pipe is fixedly installed in the middle of the detection cylinder, and a fixed cylinder is set in the middle of the material pipe. An impact port is opened in the middle of the upper side of the fixed cylinder, and a bottom slot is opened in the middle of the lower side of the fixed cylinder. A support groove is fixedly installed in the middle of the rear side of the fixed cylinder. An air outlet is fixedly installed at the front air outlet end of the refrigeration device. An impact detection element is set on the lower side of the main control device. A support element is fixedly installed at the upper end of the impact detection element, and an adjustment knob is fixedly installed at the lower end of the impact detection element. A thread is opened on the outer side of the middle of the adjustment knob. The height of the impact detection element can be adjusted by adjusting the knob. The cable rewinder and the lifting element form a lifting module. A temperature detection module is set at the output end of the refrigeration device. The impact detection element and the support element form an impact sensing module. The lifting module, the temperature detection module, and the impact sensing module are all electrically connected to the main control module composed of the main control device.

[0008] Furthermore, the mounting plate is fixedly connected to the stabilizing cylinder via a guide member, and the cable reel is wound with a metal cable, which passes through the guide member and the stabilizing cylinder and is fixedly connected to the lifting member.

[0009] By adopting the above technical solution, the metal cable passes through the guide and the stabilizing cylinder and is fixedly connected to the lifting component. The metal cable can be rotated and wound by the cable rewinder, thereby controlling the up and down movement of the lifting component, and the stabilizing cylinder can maintain the stability of the lifting.

[0010] Furthermore, a flip-top cover is rotatably provided in the middle of the impact cylinder, and vertical pressure relief slits are provided on both sides of the lower side of the impact cylinder.

[0011] By adopting the above technical solution, the flip cover can be flipped open, which makes it convenient for operators to inspect and maintain the lifting and impact components. When the device is started, the flip cover needs to be sealed and closed. During the falling process of the impact component, the air inside the impact cylinder will be depressurized from the pressure relief seam.

[0012] Further, a pair of second electromagnetic plates are fixedly installed on the lower side of the intermediate plate, a pair of third electromagnetic plates are fixedly installed on the bottom of the inner cavity of the impact cylinder, the second electromagnetic plates and the third electromagnetic plates form a third electromagnetic induction module, and a pressure sensor is arranged at the lower end of the third electromagnetic plates.

[0013] By adopting the above technical scheme, when the third electromagnetic plates are powered on, the third electromagnetic plates push the second electromagnetic plates upward, when the impact piece contacts the intermediate plate, the pressure sensor at the lower side of the third electromagnetic plates detects the pressure change and outputs a signal to the master control device, the master control device controls the third electromagnetic plates and the second electromagnetic plates to be powered off, the impact piece and the intermediate plate are synchronously pressed downward, and the impact head is pushed downward.

[0014] Further, an elastic expansion opening is arranged in the middle of the support groove, the elastic expansion opening is arranged in the middle of the support groove through a spring, and square through grooves are arranged at the side edges of the air outlet and the elastic expansion opening.

[0015] By adopting the above technical scheme, when the fixed cylinder is inserted into the middle of the material pipe, the elastic expansion opening is aligned with the air outlet and is inserted, at this time, the spring of the elastic expansion opening is stretched and is pushed out, and the refrigeration device can continuously refrigerate the inside of the fixed cylinder through the air outlet and the elastic expansion opening and can detect.

[0016] Further, a sealing cover is screwedly arranged at the middle of the front side of the material pipe, a heat preservation cover is screwedly arranged at the middle of the front side of the fixed cylinder, a pair of support plates are fixedly installed at the top of the inner cavity of the fixed cylinder, and the support plates are symmetrical triangular members.

[0017] By adopting the above technical scheme, the triangular structure of the support plates can fix seamless steel pipe workpieces of different sizes, and the multi-point fixing mode of the seamless steel pipe workpieces is not easy to rotate in the impact process, so that the stability of the detection result is increased.

[0018] Further, a first electromagnetic plate is arranged at the middle of the lower side of the lifting piece, a first metal piece is fixedly installed at the middle of the upper end of the impact piece, the first metal piece can be embedded in the middle of the first electromagnetic plate, the first electromagnetic plate and the first metal piece form a first electromagnetic induction module, and the third magnetic attraction plate and the impact head form a second electromagnetic induction module.

[0019] By adopting the above technical scheme, when the first electromagnetic plate at the lower side of the lifting piece is powered on, the first metal piece drives the impact piece to rise, when the impact piece rises to a proper height, the lifting piece is powered off, the impact piece does free fall along the impact cylinder, and stable impact force is formed.

[0020] Compared with the prior art, the advantages of the present application are that:

[0021] 1、the present application, by setting up the fixed cylinder structure, can set seamless steel pipe workpiece in the middle of fixed cylinder, make its inside reduce to experimental temperature, directly to the middle of steel pipe for stamping test, and after the test can conveniently take out the whole fixed cylinder to the seamless steel pipe workpiece is stored and protects, effectively avoid the temperature difference too big to cause the stamping part deformation.

[0022] 2、the present application, by setting up the structure of impact head, when stamping is finished, the impact head will be embedded in the inside of seamless steel pipe workpiece, when the stamping head embeds the deeper seamless steel pipe workpiece and causes greater damage, the operator can take out the stamping head and steel pipe together, measure, effectively avoid the damage position further expand caused by forced separation, cause experimental error. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 it is the schematic diagram of the whole structure of the present application.

[0024] Figure 2 it is the structure schematic diagram of the impact cylinder of the present application.

[0025] Figure 3 it is the structure schematic diagram of the lifting piece of the present application.

[0026] Figure 4 it is the sectional view of the whole structure of the present application.

[0027] Figure 5 it is the structure enlarged view of A in the present application, Figure 4

[0028] Figure 6 it is the structure schematic diagram of the support groove of the present application.

[0029] Figure 7 it is the structure sectional view of the support groove of the present application.

[0030] Figure 8 it is the initial state schematic diagram of the transmission piece of the present application.

[0031] Figure 9 it is the structure schematic diagram of the stamping process of the transmission piece of the present application.

[0032] Figure 10 it is the structure schematic diagram of the transmission piece after stamping of the present application.

[0033] Figure 11 it is the structure block diagram of the impact detection system of the present application.

[0034] ​Explanation of the numbers in the diagram: 1. Cable reel; 101. Metal cable; 2. Support frame; 3. Refrigeration unit; 301. Air outlet; 4. Inspection cover; 5. Detection cylinder; 6. Material pipe; 601. Sealing cover; 7. Fixing base; 8. Main control device; 9. Flip cover; 10. Impact cylinder; 1001. Pressure relief seam; 11. Mounting plate; 12. Guide component; 13. Stabilizing cylinder; 14. Lifting component; 1401. First electromagnetic plate; 15. Impact component; 1501. First metal component; 16. Middle 1601, Second electromagnetic plate; 1602, Third electromagnetic plate; 17, Connecting rod; 18, Guide cylinder; 19, Fixing component; 20, Transmission component; 21, Third magnetic suction plate; 22, Impact head; 23, Fixing cylinder; 2301, Impact port; 2302, Support groove; 2303, Elastic telescopic port; 2304, Bottom slot; 24, Impact detection component; 2401, Support component; 2402, Adjustment knob; 25, Seamless steel pipe workpiece; 26, Insulation cover; 27, Support plate. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1-11 As shown, the embodiment of the present invention provides: a support frame 2, a cable rewinder 1 fixedly installed on the upper middle part of the support frame 2, a cooling device 3 fixedly installed on the middle part of the support frame 2, an installation plate 11 fixedly installed on the front side of the support frame 2, a stabilizing cylinder 13 provided on the upper front side of the installation plate 11, an impact cylinder 10 fixedly installed on the middle part of the front side of the installation plate 11, a lifting member 14 provided on the middle part of the impact cylinder 10, and an impact member 15 provided on the lower side of the lifting member 14;

[0037] A main control device 8 is fixedly installed on the front side of the middle part of the cable support frame 2. A guide cylinder 18 is fixedly installed on the middle of the lower end of the impact cylinder 10. A fixed seat 7 is fixedly installed on the lower end of the guide cylinder 18. A detection cylinder 5 is fixedly installed in the middle of the fixed seat 7. An impact assembly is provided in the middle of the guide cylinder 18. The impact assembly includes a connecting rod 17 that is slidably arranged in the middle of the guide cylinder 18. An intermediate plate 16 is fixedly installed on the upper end of the connecting rod 17. A fixing member 19 is fixedly installed on the lower end of the connecting rod 17. A transmission member 20 is fixedly installed on the lower side of the fixing member 19. A third magnetic suction plate 21 is fixedly installed in the middle of the lower side of the transmission member 20. An impact head 22 is provided in the middle of the lower side of the third magnetic suction plate 21.

[0038] The middle part of the detection cylinder 5 is fixedly installed with a material pipe 6, the middle part of the material pipe 6 is provided with a fixed cylinder 23, the upper middle part of the fixed cylinder 23 is provided with an impact opening 2301, the lower middle part of the fixed cylinder 23 is provided with a bottom clamping groove 2304, the rear middle part of the fixed cylinder 23 is fixedly installed with a supporting groove 2302, the front air outlet end of the refrigeration device 3 is fixedly installed with an air outlet 301, the lower side of the main control device 8 is provided with an impact detection piece 24, the upper end of the impact detection piece 24 is fixedly installed with a supporting piece 2401, the lower end of the impact detection piece 24 is fixedly installed with an adjusting knob 2402, the middle part of the adjusting knob 2402 is provided with a thread on the outer side, the height of the impact detection piece 24 can be adjusted through the adjusting knob 2402, the cable winder 1 and the lifting piece 14 constitute a lifting module, the output end of the refrigeration device 3 is provided with a temperature detection module, the impact detection piece 24 and the supporting piece 2401 constitute an impact sensing module, the lifting module, the temperature detection module and the impact sensing module are electrically connected with the main control module composed of the main control device 8;

[0039] The mounting plate 11 is fixedly connected with the stabilizing cylinder 13 through the guide piece 12, the cable winder 1 is wound with a metal cable 101, the metal cable 101 is fixedly connected with the lifting piece 14 through the guide piece 12 and the stabilizing cylinder 13, the metal cable 101 is fixedly connected with the lifting piece 14 through the guide piece 12 and the stabilizing cylinder 13, the metal cable 101 can be rotationally wound through the cable winder 1, so that the lifting piece 14 can move up and down, and the stabilizing cylinder 13 can keep the lifting stable;

[0040] The middle part of the impact cylinder 10 is rotationally provided with a turnover cover 9, the lower side of the impact cylinder 10 is provided with a vertical pressure relief seam 1001 on both sides, the turnover cover 9 can be turned over and opened, so that the operator can conveniently maintain and repair the lifting piece 14 and the impact piece 15, when the device is started, the turnover cover 9 needs to be sealed and closed, and the air in the impact cylinder 10 inside the impact piece 15 in the falling process can be relieved from the pressure relief seam 1001 position;

[0041] The lower side of the middle plate 16 is fixedly installed with a pair of second electromagnetic plates 1601, the inner cavity bottom of the impact cylinder 10 is fixedly installed with a pair of third electromagnetic plates 1602, the second electromagnetic plates 1601 and the third electromagnetic plates 1602 constitute a third electromagnetic induction module, the lower end of the third electromagnetic plate 1602 is provided with a pressure sensor, when the third electromagnetic plate 1602 is electrified, the third electromagnetic plate 1602 will push the second electromagnetic plate 1601 upward, when the impact piece 15 contacts the middle plate 16, the pressure sensor on the lower side of the third electromagnetic plate 1602 detects the pressure change and outputs a signal to the main control device 8, the main control device 8 controls the third electromagnetic plate 1602 and the second electromagnetic plate 1601 to be de-energized, and the impact piece 15 and the middle plate 16 will be downwardly synchronized to the pressure, and will push the impact head 22 downwardly;

[0042] The middle part of the support groove 2302 is provided with an elastic expansion port 2303, which is arranged in the middle part of the support groove 2302 by a spring. The side edges of the air outlet 301 and the elastic expansion port 2303 are provided with corresponding square through grooves. After the fixed cylinder 23 is inserted into the middle part of the material pipe 6, the elastic expansion port 2303 is aligned and inserted into the air outlet 301. At this time, the spring of the elastic expansion port 2303 is stretched and ejected. The refrigeration device 3 can continuously cool and detect the inside of the fixed cylinder 23 through the air outlet 301 and the elastic expansion port 2303.

[0043] The front middle part of the material pipe 6 is provided with a sealing cover 601, and the front middle part of the fixed cylinder 23 is provided with a heat preservation cover 26. A pair of support plates 27 are fixedly installed at the top of the inner cavity of the fixed cylinder 23. The support plates 27 are symmetrical triangular members. The triangular structure of the support plates 27 can fix seamless steel pipe workpieces 25 of different sizes. The multi-point fixed manner of the seamless steel pipe workpieces 25 is not easy to rotate during impact, thereby increasing the stability of the detection result.

[0044] The lower middle part of the lifting piece 14 is provided with a first electromagnetic plate 1401, and the upper middle part of the impact piece 15 is fixedly installed with a first metal piece 1501. The first metal piece 1501 can be embedded in the middle part of the first electromagnetic plate 1401. The first electromagnetic plate 1401 and the first metal piece 1501 constitute a first electromagnetic induction module. The third magnetic attraction plate 21 and the impact head 22 constitute a second electromagnetic induction module. After the first electromagnetic plate 1401 at the lower side of the lifting piece 14 is electrified, the impact piece 15 is driven to rise through the first metal piece 1501. When the impact piece 15 rises to a suitable height, the lifting piece 14 is de-energized. The impact piece 15 does free fall along the impact cylinder 10, thereby forming a stable impact force.

[0045] The working principle of the present application is: the operator controls the plurality of modules inside through the master control device 8, the internal master control module is of the type plcs7-200, after the device is started, the master control module of the master control device 8 controls the third electromagnetic induction module to start, the third electromagnetic plate 1602 and the second electromagnetic plate 1601 generate repulsive force, so that the middle plate 16 rises upward, the middle plate 16 drives the transmission piece 20 as a whole to rise through the connecting rod 17, the third magnetic attraction plate 21 and the impact head 22 constitute the second electromagnetic induction module, the master control device 8 controls the third magnetic attraction plate 21 to fix the impact head 22, the operator sets the seamless steel pipe workpiece 25 in the fixed cylinder 23, then inserts one end provided with the supporting groove 2302 into the material pipe 6, finally the supporting groove 2302 is connected with the air outlet 301 on the front side of the refrigeration device 3, because the middle part of the supporting groove 2302 is provided with the elastic expansion port 2303, the elastic expansion port 2303 is arranged in the middle part of the supporting groove 2302 through the spring, the side of the air outlet 301 and the elastic expansion port 2303 is provided with the corresponding square through groove, the air outlet 301 is inserted into the inside of the elastic expansion port 2303, the spring of the elastic expansion port 2303 is compressed, the elastic expansion port 2303 is inserted in alignment with the air outlet 301, the square through groove on the side of the air outlet 301 is communicated with the internal space of the fixed cylinder 23 through the square through groove on the side of the elastic expansion port 2303, the operator can open the maintenance cover 4, rotate the adjusting knob 2402 using tools, so that the impact detection piece 24 can be moved upward, until the top of the supporting piece 2401 contacts the lower side of the seamless steel pipe workpiece 25, the supporting piece 2401 and the supporting plate 27 can clamp and limit the seamless steel pipe workpiece 25;

[0046] The main control module controls the cable winder 1 to start, at this time the first electromagnetic plate 1401 on the lower side of the lifting piece 14 is electrified, and the impact piece 15 is adsorbed and fixed through the first metal piece 1501, the lifting piece 14 is pulled upward by the metal cable 101 until the set position, then the refrigeration device 3 starts, and the refrigeration device 3 cools the inside of the fixed cylinder 23 through the air outlet 301 and the supporting groove 2302, when the induction module of the refrigeration device 3 senses that the temperature decreases to the specified temperature of the main control module of the main control device 8, a signal is transmitted to the main control device 8, at this time the main control module gives a signal to the first electromagnetic induction module, the first electromagnetic plate 1401 in the first electromagnetic induction module is de-energized, the impact piece 15 does free fall along the inside of the impact cylinder 10 under the action of gravity, when the impact piece 15 contacts the middle plate 16, the pressure sensor on the lower side of the third electromagnetic plate 1602 detects the pressure change and outputs a signal to the main control device 8, the main control device 8 controls the third electromagnetic plate 1602 and the second electromagnetic plate 1601 to be de-energized, the impact piece 15 and the middle plate 16 will be synchronized downward, which will push the impact head 22 downward, the impact force of gravity will pass through the impact head 22 and contact the seamless steel pipe workpiece 25 through the impact opening 2301 on the upper side of the middle part of the fixed cylinder 23, and the impact force test is performed on the seamless steel pipe workpiece 25, the impact sensing module of the impact detection piece 24 will record the value of the impact, when the impact test is completed, the main control module controls the second electromagnetic induction module to be closed, the third magnetic attraction plate 21 is separated from the impact head 22, then the third electromagnetic induction module starts, the third electromagnetic plate 1602 and the second electromagnetic plate 1601 generate repelling force, which drives the transmission piece 20 to lift upward, at this time the operator can rotate and open the sealing cover 601, and the entire fixed cylinder 23 can be taken out, the fixed cylinder 23 can reduce the contact between the internal low-temperature gas and the external air, and the impact opening 2301 and the supporting groove 2302 only slowly leak the internal cold air, so as to avoid large temperature difference changes, and since the impact head 22 is retained in the inside of the fixed cylinder 23 after the impact test is completed, even if the impact force is too large and the impact head 22 is inserted too deeply into the inside of the seamless steel pipe workpiece 25, the operator can also take down the seamless steel pipe workpiece 25 and the impact head 22 together, measure and observe the damage position caused by the impact, effectively avoid the damage position caused by forced separation from being further expanded, and cause experimental errors.

[0047] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A device for testing the resistance to low-temperature impact of seamless perforated steel pipes, comprising a support frame (2), characterised in that: The middle part of the support frame (2) is fixedly installed with a refrigeration device (3), the front side of the support frame (2) is fixedly installed with a mounting plate (11), the front middle part of the mounting plate (11) is fixedly installed with an impact cylinder (10), and the middle part of the impact cylinder (10) is provided with a lifting piece (14); The middle part of the front side of the support frame (2) is fixedly installed with a main control device (8), the lower end of the middle part of the impact cylinder (10) is fixedly installed with a guide cylinder (18), the lower end of the guide cylinder (18) is fixedly installed with a fixed seat (7), the middle part of the fixed seat (7) is fixedly installed with a detection cylinder (5), the middle part of the guide cylinder (18) is provided with an impact assembly, the impact assembly comprises a connecting rod (17) slidingly arranged in the middle part of the guide cylinder (18), the upper end of the connecting rod (17) is fixedly installed with an intermediate plate (16), the lower end of the connecting rod (17) is fixedly installed with a fixing piece (19), the lower side of the fixing piece (19) is fixedly installed with a transmission piece (20), the lower middle part of the transmission piece (20) is fixedly installed with a third magnetic plate (21), and the lower middle part of the third magnetic plate (21) is provided with an impact head (22); The middle part of the detection cylinder (5) is fixedly installed with a material pipe (6), the middle part of the material pipe (6) is provided with a fixed cylinder (23), the middle part of the rear side of the fixed cylinder (23) is fixedly installed with a supporting groove (2302), the lower side of the main control device (8) is provided with an impact detection piece (24), the middle part of the fixed cylinder (23) is provided with a seamless steel pipe workpiece (25), when the inside of the fixed cylinder (23) is lowered to an experimental temperature, a punch test is directly performed on the middle seamless steel pipe workpiece (25), and after the test, the entire fixed cylinder (23) can be conveniently taken out to store and protect the seamless steel pipe workpiece (25), so that the deformation of the punch part caused by excessive temperature difference is effectively avoided, when the punch is completed, the impact head (22) is embedded into the inside of the seamless steel pipe workpiece (25), when the impact head (22) is embedded into the seamless steel pipe workpiece (25) too deeply and causes great damage, the operator can take out the impact head (22) and the seamless steel pipe workpiece (25) together for measurement, so that the damage position is effectively prevented from being further expanded due to forced separation, and experimental errors are caused; The lower side of the intermediate plate (16) is fixedly installed with a pair of second electromagnetic plates (1601), the bottom of the inner cavity of the impact cylinder (10) is fixedly installed with a pair of third electromagnetic plates (1602), the second electromagnetic plates (1601) and the third electromagnetic plates (1602) constitute a third electromagnetic induction module, and the lower end of the third electromagnetic plates (1602) is provided with a pressure sensor.

2. A device for testing the low-temperature impact resistance of a seamless perforated steel pipe according to claim 1, characterized in that: The upper middle part of the support frame (2) is fixedly installed with a cable winder (1), the mounting plate (11) is fixedly connected with a stabilizing cylinder (13) through a guide piece (12), the cable winder (1) is wound with a metal cable (101), the upper end of the front side of the mounting plate (11) is provided with a stabilizing cylinder (13), the metal cable (101) is fixedly connected with a lifting piece (14) through the guide piece (12) and the stabilizing cylinder (13), and the cable winder (1) and the lifting piece (14) constitute a lifting module.

3. The apparatus according to claim 1, wherein: The middle part of the impact cylinder (10) is rotatably provided with a turnover cover (9), and the lower side of the impact cylinder (10) is provided with vertical pressure relief seams (1001) on both sides.

4. The apparatus according to claim 1, wherein: The middle part of the support groove (2302) is provided with an elastic expansion opening (2303), the elastic expansion opening (2303) is arranged in the middle part of the support groove (2302) through a spring, the front air outlet end of the refrigeration device (3) is fixedly installed with an air outlet (301), and the side edges of the air outlet (301) and the elastic expansion opening (2303) are provided with corresponding square through grooves.

5. The apparatus for testing the low-temperature impact resistance of a seamless perforated steel pipe according to claim 1, characterized in that: The front middle part of the material pipe (6) is threadedly provided with a sealing cover (601), the front middle part of the fixing cylinder (23) is threadedly provided with a heat preservation cover (26), the inner cavity of the fixing cylinder (23) is fixedly installed with a pair of support plates (27) at the top, and the support plates (27) are symmetrical triangular members.

6. The apparatus for testing the low-temperature impact resistance of a seamless perforated steel pipe according to claim 1, characterized by: The lower middle part of the lifting piece (14) is provided with a first electromagnetic plate (1401), the lower side of the lifting piece (14) is provided with an impact piece (15), the upper end of the middle part of the impact piece (15) is fixedly installed with a first metal piece (1501), the first metal piece (1501) can be embedded in the middle part of the first electromagnetic plate (1401), the first electromagnetic plate (1401) and the first metal piece (1501) constitute a first electromagnetic induction module, and the third magnetic attraction plate (21) and the impact head (22) constitute a second electromagnetic induction module.

7. The apparatus according to claim 1, wherein: The upper end of the impact detection piece (24) is fixedly installed with a support piece (2401), the lower end of the impact detection piece (24) is fixedly installed with an adjusting knob (2402), the middle part of the outer side of the adjusting knob (2402) is provided with a thread, and the height of the impact detection piece (24) can be adjusted through the adjusting knob (2402).

8. The apparatus according to claim 1, wherein: The output end of the refrigeration device (3) is provided with a temperature detection module, the impact detection piece (24) and the support piece (2401) constitute an impact sensing module, and the temperature detection module and the impact sensing module are electrically connected with a main control module composed of the main control device (8).

9. The apparatus for testing the low-temperature impact resistance of a seamless perforated steel pipe according to claim 1, characterized by: The upper middle part of the fixing cylinder (23) is provided with an impact opening (2301), and the lower middle part of the fixing cylinder (23) is provided with a bottom clamping groove (2304).

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