A Real-time Monitoring and Testing Machine for Tensile Strength and Deformation of Copper Tubes

Abstract

This invention discloses a real-time monitoring and testing machine for the tensile strength and deformation of copper pipes in the field of steel pipe strength testing technology. It includes a testing system and a clamping assembly. The testing system consists of a frame mechanism and an upper tensioning mechanism. The clamping assembly is symmetrically installed at both ends of the frame system with the upper tensioning mechanism as its central axis. The clamping assembly includes: a positioning system comprising an inner circular tube, an outer rectangular shell, and an inner expansion layer, which are sequentially nested together. The inner expansion layer is located at the innermost layer, and both ends of the nesting are sealed by sealing plates. The inner circular tube and the outer rectangular shell form buffer cavities distributed at the four corners, and an expansion cavity is formed between the inner expansion layer and the inner circular tube; and a pneumatic system comprising a circulation pipe, an inlet pipe, and a control assembly. The circulation pipe and the inlet pipe work together to introduce external gas into the expansion cavity. This invention provides a testing device with stronger clamping force, higher adaptability, and lower wear on the steel pipe clamping end.

Description

Technical Field

[0001] This invention relates to the field of steel pipe strength testing technology, specifically to a real-time monitoring and testing machine for the tensile strength and deformation of copper pipes. Background Technology

[0002] The steel pipe monitoring and testing machine requires clamping and fixing the steel pipe with a clamp, and then applying external force to the steel pipe to monitor the deformation and stress curve of the steel pipe under the action of external force, so as to obtain the tensile strength and deformation curve of the steel pipe. However, when the inner wall of the clamp is flat or sharp, the thin wall of the steel pipe is locally crushed or even flattened, which easily causes the clamped section of the steel pipe to yield and break first, and the true tensile strength cannot be measured. In addition, the flat and sharp corners of the clamp do not fit the contact surface with the steel pipe, resulting in uneven stress.

[0003] To address these issues, existing equipment uses curved clamps to fit the inner wall of the steel pipe, preventing stress concentration. However, the inner wall of the curved clamp is prone to insufficient clamping force when holding the steel pipe, and the pipe may even slip during stretching, resulting in inflated deformation data and making it impossible to complete the stability test. Furthermore, the curvature of the clamp's inner wall is generally fixed, limiting its adaptability to different pipe diameters; it often only clamps pipes of a single diameter, thus limiting its applicability. Existing clamps also cannot prevent the clamped end of the steel pipe from wearing down against the clamp edge after stress is applied, leading to breakage at the clamped end during testing. Summary of the Invention

[0004] The technical problem of the present invention is to provide a copper tube tensile strength and deformation real-time monitoring and testing machine, so as to provide a testing device with more clamping force, higher adaptability and less wear on the steel tube clamping end.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a real-time monitoring and testing machine for the tensile strength and deformation of copper tubes, comprising a detection system and a clamping assembly. The detection system consists of a frame mechanism and an upper tension mechanism. The upper tension mechanism is fixed to the top of the frame mechanism. The clamping assembly is symmetrically installed at both ends of the frame system with the upper tension mechanism as its central axis. The clamping assembly includes:

[0006] Positioning system: The positioning system includes an inner circular tube, an outer rectangular shell, and an inner expansion layer. The inner expansion layer, the inner circular tube, and the outer rectangular shell are sequentially nested together. The inner expansion layer is located at the innermost layer and both ends of the nesting are sealed by sealing plates. The inner circular tube and the outer rectangular shell form buffer cavities distributed at the four corners. An expansion cavity is formed between the inner expansion layer and the inner circular tube.

[0007] The pneumatic system includes a circulation pipe, an inlet pipe, and a control component. The circulation pipe and the inlet pipe work together to introduce external gas into the expansion chamber, and the control component can detect the pneumatic pressure data and control the gas input rate.

[0008] As a further embodiment of the present invention, each clamping assembly is provided with a positioning component. The inner expansion layer is cylindrical and forms a clamping cavity through which the steel pipe can pass. The positioning component includes a sliding frame, an air pump, a connecting column, a sliding plug, and a support roller. One end of the sliding frame is slidably connected to the upper surface of the outer rectangular shell, and the other end is located on one side of the clamping assembly and is fixedly installed with the air pump and the connecting column. A cylindrical chamber is provided inside the connecting column, and the air pump can input gas into the cylindrical chamber. Four sets of sliding grooves are equidistantly opened on the side wall of the cylindrical chamber. A sliding plug is slidably connected in each sliding groove. One end of the sliding plug is located outside the connecting column, and the other end is fixedly connected to the support roller. The multiple sets of support rollers can support the inner wall of the steel pipe and perform preliminary positioning of the steel pipe.

[0009] As a further embodiment of the present invention, the main body of the circulation pipe is a main connecting pipe connected end to end. An external control valve and an internal control valve are provided on the main connecting pipe. The external control valve and the internal control valve are respectively installed at both ends of the circulation pipe. The internal control valve is located inside the buffer chamber, while the external control valve is located outside the outer rectangular shell. A circulation pipe is provided in each set of buffer chambers. When both the internal control valve and the external control valve are fully open, the external gas of the outer rectangular shell can be introduced into the buffer chamber. The inlet pipe is fixedly installed in the inner circular pipe. The inner circular pipe can introduce the gas in the buffer chamber into the expansion chamber.

[0010] As a further embodiment of the present invention, the frame mechanism includes an upper column and a lower support plate. The upper column is fixedly installed in the middle position of the lower support plate. The upper tensioning mechanism is fixedly installed at the upper end of the upper column. Both ends of the lower support plate are slidably mounted with clamp mounting frames. The clamping assembly is fixedly installed on the clamp mounting frames. The upper tensioning mechanism is provided with a driving mechanism and a tensioning rod. The tensioning rod is slidably connected between the two sets of upper columns. During tensile strength testing, the driving mechanism can drive the tensioning rod located below the steel pipe to move upward.

[0011] As a further embodiment of the present invention, a connecting rod is provided between the two sets of clamp mounting brackets. The length of the connecting rod is adjustable, and when the connecting rod is extended, the clamp mounting brackets at both ends can be equidistant from the upper column.

[0012] As a further aspect of the present invention, the control component includes:

[0013] Detection Unit: The detection unit includes a pressure sensor and a valve body. Pressure sensors are installed in both the buffer chamber and the expansion chamber. The valve body is equipped with both a two-way valve and a one-way valve. Both the external control valve and the internal control valve are one-way valves. The one-way valve allows external air to enter the buffer chamber through the circulation pipe. A two-way valve is installed on the inlet pipe. A pressure relief valve is installed on one side of the buffer chamber. The pressure relief valve can reduce the air pressure in the buffer chamber.

[0014] Drive unit: The drive unit includes a control motherboard and a suction pump. The suction pump is fixedly installed on the circulation pipe. The control motherboard can analyze the air pressure information detected by the air pressure sensor and can control the opening and closing of the two-way valve and the one-way valve.

[0015] As a further embodiment of the present invention, a plurality of anti-slip protrusions are fixedly installed on the outer surface of the inner expansion layer, a plurality of concentric stress grooves are formed on the inner expansion layer, and the inner expansion layer is provided with an elastic limit, which prevents the inner expansion layer from elongating after reaching the elastic limit.

[0016] As a further embodiment of the present invention, a threaded assembly is rotatably mounted on the upper surface of the outer rectangular shell. The threaded assembly includes a threaded rod and a rotating motor. The threaded rod is threadedly connected to the upper end of the sliding frame. The rotating motor is fixedly mounted on one side of the outer rectangular shell, and its output end is fixedly connected to the threaded rod.

[0017] As a further embodiment of the present invention, a positioning component is provided on the lower support plate. The positioning component includes a side threaded rod and a positioning locking block. The side threaded rod is rotatably connected to both sides of the lower support plate. The lower end of the positioning locking block is threadedly connected to the side threaded rod, and the upper end is retractable and can be locked into the bottom limiting groove of the fixture mounting frame after retraction.

[0018] As a further embodiment of the present invention, the driving mechanism includes two sets of hydraulic cylinders, which are fixedly installed inside the upper column. The two sets of hydraulic cylinders operate synchronously to lift the tension rod upward from both ends.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, the inner expansion layer is clamped onto the surface of the steel pipe body during testing. After the inner expansion layer stretches and deforms to its limit, it stops deforming. At this time, the gas content in the expansion chamber increases, causing the gas pressure in the expansion chamber to continuously rise. This increases the clamping force of the inner expansion layer on the steel pipe body. This method of clamping and fixing the steel pipe body through air pressure, with the inner expansion layer in direct contact with the steel pipe body being made of flexible material, differs from previous rigid clamping devices. This avoids the misalignment between the clamping plane and the contact surface of the steel pipe body, eliminating the problem of uneven force on the clamping end of the steel pipe body. Furthermore, when the steel pipe is tested for bending, the clamping end will not rub against the edge of the rigid clamping device, thus preventing the clamping section of the steel pipe from yielding and breaking first, ensuring the authenticity of the test data.

[0021] 2. In this invention, the inner expansion layer can completely surround and wrap around the end of the steel pipe, and can completely fit the end of the steel pipe, increasing the clamping area between the steel pipe and the clamp, reducing the possibility of slippage between the steel pipe and the clamp. In addition, the inner expansion layer has extensibility, which, compared with the previous situation where the arc-shaped clamp has a fixed curvature or limited adjustment capability, can clamp steel pipes of different diameters, making it highly applicable. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the clamping component in the present invention;

[0025] Figure 3 This is a cross-sectional view of the clamping component structure in the present invention. Figure 1 ;

[0026] Figure 4 This is a cross-sectional view of the clamping component structure in the present invention. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the positioning component in this invention;

[0028] Figure 6 This is a schematic diagram of the circulation pipe in this invention;

[0029] Figure 7 This is a schematic diagram of the structure of the inner expansion layer in this invention;

[0030] Figure 8 This is a schematic diagram of the present invention.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Upper tensioning mechanism; 2. Upper column; 3. Lower support plate; 4. Fixture mounting frame; 5. Clamping assembly; 501. Inner circular tube; 502. Outer rectangular shell; 503. Inlet tube; 6. Positioning assembly; 601. Sliding frame; 602. Air pump; 603. Support roller; 604. Sliding plug; 605. Connecting column; 606. Sliding groove; 7. Circulation pipe; 701. Main connecting pipe; 702. External control valve; 703. Internal control valve; 8. Connecting rod; 9. Inner expansion layer; 901. Anti-slip protrusion; 902. Stress groove. Detailed Implementation

[0033] 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.

[0034] Please see Figures 1-8 This invention provides a technical solution: a real-time monitoring and testing machine for the tensile strength and deformation of copper tubes, comprising a testing system and a clamping assembly 5. The testing system consists of a frame mechanism and an upper tension mechanism 1, the upper tension mechanism 1 being fixed to the top of the frame mechanism. The clamping assembly 5 is symmetrically installed at both ends of the frame system with the upper tension mechanism 1 along its central axis. The clamping assembly 5 includes:

[0035] Positioning system: The positioning system includes an inner circular tube 501, an outer rectangular shell 502 and an inner expansion layer 9. The inner expansion layer 9, the inner circular tube 501 and the outer rectangular shell 502 are sequentially nested together. The inner expansion layer 9 is located in the innermost layer and both ends of the nesting are sealed by sealing plates. The inner circular tube 501 and the outer rectangular shell 502 form buffer cavities distributed at the four corners. An expansion cavity is formed between the inner expansion layer 9 and the inner circular tube 501.

[0036] The pneumatic system includes a circulation pipe 7, an inlet pipe 503, and a control component. The circulation pipe 7 and the inlet pipe 503 work together to introduce external gas into the expansion chamber, and the control component can detect the pneumatic pressure data and control the gas input rate.

[0037] During operation, the steel pipe in this invention is fixed by the clamping assembly 5. During testing, the end of the steel pipe is inserted into the clamping cavity formed by the surrounding inner expansion layer 9. Driven by the control assembly in the pneumatic system, gas is introduced into the buffer cavity and expansion cavity through the circulation pipe 7 and the inlet pipe 503 in sequence. Under the action of air pressure, the inner expansion layer 9 on the inner side of the expansion cavity expands and adheres to the steel pipe body, so that the inner expansion layer 9 is clamped on the surface of the steel pipe body. After the inner expansion layer 9 stretches and deforms to its limit, it no longer deforms. At this time, the gas content in the expansion cavity increases, so the air pressure in the expansion cavity to which the inner expansion layer 9 belongs continues to rise, thereby increasing the clamping force of the inner expansion layer 9 on the steel pipe body. This method of clamping and fixing the steel pipe body by air pressure, with the inner expansion layer 9 in direct contact with the steel pipe body being made of flexible material, is different from the previous rigid clamping equipment. It avoids the contact surface between the clamping head plane and the steel pipe body not fitting, eliminates the problem of uneven force on the clamping end of the steel pipe body, and when the steel pipe is tested for bending, the clamping end will not rub against the edge of the rigid clamping equipment (as shown in Figure 8). As shown in the figure, this avoids the situation where the clamping section of the steel pipe yields and breaks first, thus ensuring the authenticity of the test data.

[0038] In this invention, the inner expansion layer 9 can completely surround and wrap around the end of the steel pipe, and can completely fit the end of the steel pipe, increasing the clamping area between the steel pipe and the clamp, reducing the possibility of slippage between the steel pipe and the clamp. In addition, the inner expansion layer 9 has extensibility, which, compared with the previous situation where the arc-shaped clamp has a fixed curvature or limited adjustment capability, can clamp steel pipes of different diameters, making it highly applicable.

[0039] As a further embodiment of the present invention, each clamping assembly 5 is provided with a positioning assembly 6. The inner expansion layer 9 is cylindrical and forms a clamping cavity through which the steel pipe can pass. The positioning assembly 6 includes a sliding frame 601, an air pump 602, a connecting column 605, a sliding plug 604, and a support roller 603. One end of the sliding frame 601 is slidably connected to the upper surface of the outer rectangular shell 502, and the other end is located on one side of the clamping assembly 5 and is fixedly installed with the air pump 602 and the connecting column 605. A cylindrical chamber is provided inside the connecting column 605. The air pump 602 can input gas into the cylindrical chamber. Four sets of sliding grooves 606 are equidistantly opened on the side wall of the cylindrical chamber. A sliding plug 604 is slidably connected in each sliding groove 606. One end of the sliding plug 604 is located outside the connecting column 605, and the other end is fixedly connected to the inside of the cylindrical chamber by a spring. The other end is fixedly connected to the support roller 603. The multiple sets of support rollers 603 can support the inner wall of the steel pipe and perform preliminary positioning of the steel pipe.

[0040] During operation, before the inner expansion layer 9 clamps and fixes the steel pipe body, the positioning component 6 pre-adjusts the position of the steel pipe to keep the sliding frame 601 symmetrical. This ensures that the axes of the connecting columns 605 on both ends of the positioning component 6 coincide and are perpendicular to the upper column. By having both ends of the positioning component 6 on the same horizontal axis, the axis of the steel pipe to be tested inserted into the positioning component 6 is perpendicular to the upper column 2 while remaining horizontal to the lower support plate 3. In specific operation, after determining the positions of the positioning components 6 at both ends, the steel pipe is inserted into the inner expansion layer 9. After the two ends of the steel pipe are extended from the edge of the outer rectangular shell, they are inserted into the support roller 603. At this time, gas is input into the cylindrical chamber through the air pump 602. The air pressure causes the spring to extend, thereby causing multiple sets of sliding plugs 604 to expand outward evenly. This allows the support roller 603 to be evenly supported on the inner wall of the steel pipe, so that the axis of the end of the steel pipe is consistent with the axis of the connecting column 605, thus making the tested steel pipe perpendicular to the upper column 2 and horizontal.

[0041] As a further embodiment of the present invention, the main body of the circulation pipe 7 is a main connecting pipe 701 connected end to end. An external control valve 702 and an internal control valve 703 are provided on the main connecting pipe 701. The external control valve 702 and the internal control valve 703 are respectively installed at both ends of the circulation pipe 7. The internal control valve 703 is located inside the buffer chamber, while the external control valve 702 is located outside the outer rectangular shell 502. A circulation pipe 7 is provided in each set of buffer chambers. When the internal control valve 703 and the external control valve 702 are fully opened, the external gas of the outer rectangular shell 502 can be introduced into the buffer chamber. The inlet pipe 503 is fixedly installed in the inner circular pipe 501. The inner circular pipe 501 can introduce the gas in the buffer chamber into the expansion chamber.

[0042] During operation, when clamping, the external control valve 702 and the internal control valve 703 are opened. External gas enters the buffer chamber through the main connecting pipe 701, and then enters the expansion chamber through the inlet pipe 503 evenly distributed in the buffer chamber in the dead corner. As the gas is input, the gas pressure in the expansion chamber gradually increases. The gas can enter the expansion chamber evenly through the buffer chambers distributed in the four corners, thereby making the inner expansion layer 9 expand evenly. This avoids uneven expansion gas pressure and squeezing force, which could cause positional displacement of the pre-positioned steel pipe during the unstable positioning stage.

[0043] As a further embodiment of the present invention, the frame mechanism includes an upper column 2 and a lower support plate 3. The upper column 2 is fixedly installed in the middle position of the lower support plate 3. The upper tensioning mechanism 1 is fixedly installed at the upper end of the upper column 2. Both ends of the lower support plate 3 are slidably mounted with clamp mounting frames 4. The clamping assembly 5 is fixedly installed on the clamp mounting frames 4. The upper tensioning mechanism 1 is provided with a driving mechanism and a tensioning rod. The tensioning rod is slidably connected between the two sets of upper columns 2. When the tensile strength is tested, the driving mechanism can drive the tensioning rod located below the steel pipe to move upward.

[0044] During operation, when the present invention performs strength testing, the drive mechanism drives the tension rod to move upward. The upward movement of the tension rod applies force to the steel pipe clamped between the clamping components 5. The stress deformation curve of the steel pipe is observed by the testing equipment, thereby obtaining the strength data of the steel pipe.

[0045] As a further embodiment of the present invention, a connecting rod 8 is provided between the two sets of clamp mounting frames 4. The length of the connecting rod 8 is adjustable. When the connecting rod 8 is extended, the clamp mounting frames 4 at both ends can be equidistant from the upper column 2.

[0046] During operation, the length of the connecting rod 8 in this invention is adjusted to accommodate the testing of steel pipes of various lengths, and the upper tensioning mechanism 1 is always positioned at the center line of the equipment during testing, thereby ensuring that the upper tensioning mechanism 1 can always apply force at the center line of the steel pipe.

[0047] As a further aspect of the present invention, the control component includes:

[0048] Detection Unit: The detection unit includes a pressure sensor and a valve body. Pressure sensors are installed in both the buffer chamber and the expansion chamber. The valve body is equipped with both two-way valves and one-way valves. Both the external control valve 702 and the internal control valve 703 are one-way valves. The one-way valves allow external air to enter the buffer chamber through the circulation pipe 7. A two-way valve is installed on the inlet pipe 503. A pressure relief valve is installed on one side of the buffer chamber. The pressure relief valve can reduce the air pressure in the buffer chamber.

[0049] Drive unit: The drive unit includes a control motherboard and a suction pump. The suction pump is fixedly installed on the circulation pipe 7. The control motherboard can analyze the air pressure information detected by the air pressure sensor and can control the opening and closing of the two-way valve and the one-way valve.

[0050] During operation, the pressure sensor of the detection unit detects the air pressure. When the set air pressure is reached in the expansion chamber, the information is transmitted to the control main board. The control main board closes the external control valve 702, the internal control valve 703 and the suction pump. When the steel pipe needs to be removed, the control main board opens the pressure relief valve so that the gas can flow out from the buffer chamber.

[0051] As a further embodiment of the present invention, a plurality of anti-slip protrusions 901 are fixedly installed on the outer surface of the inner expansion layer 9, and a plurality of concentric stress grooves 902 are formed on the inner expansion layer 9. The inner expansion layer 9 is provided with an elastic limit, and when the inner expansion layer 9 reaches the elastic limit, it will no longer elongate.

[0052] During operation, the present invention determines the elastic limit of the inner expansion layer 9 to avoid the deformation capacity of the inner expansion layer 9 from affecting the stability of clamping, ensuring that the inner expansion layer 9 is at the elastic limit after each clamping, while the anti-slip protrusions 901 on the inner expansion layer 9 can further prevent the steel pipe from slipping.

[0053] As a further embodiment of the present invention, a threaded assembly is rotatably mounted on the upper surface of the outer rectangular shell 502. The threaded assembly includes a threaded rod and a rotating motor. The threaded rod is threadedly connected to the upper end of the sliding frame 601. The rotating motor is fixedly mounted on one side of the outer rectangular shell 5, and its output end is fixedly connected to the threaded rod.

[0054] During operation, the present invention precisely adjusts the sliding frame 601 using a threaded rod.

[0055] As a further embodiment of the present invention, a positioning component is provided on the lower support plate 3. The positioning component includes a side threaded rod and a positioning locking block. The side threaded rod is rotatably connected to both sides of the lower support plate 3. The lower end of the positioning locking block is threadedly connected to the side threaded rod, and the upper end can extend and retract and can be locked into the bottom limiting groove of the clamp mounting frame 4 after extension and retraction.

[0056] During operation, after the connecting rod 8 extends, the clamp mounting frame 4 moves synchronously with it. After moving, the positioning lock block moves to the bottom of the clamp mounting frame 4 through the side threaded rod, so that the upper end of the positioning lock block is inserted into the clamp mounting frame 4, fixing the position of the clamp mounting frame 4.

[0057] As a further embodiment of the present invention, the driving mechanism includes two sets of hydraulic cylinders, which are fixedly installed inside the upper column 2. The two sets of hydraulic cylinders operate synchronously and can lift the tension rod upward from both ends.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A real-time monitoring and testing machine for the tensile strength and deformation of copper tubes, comprising a testing system and a clamping assembly (5), characterized in that: The detection system consists of a frame mechanism and an upper tensioning mechanism (1). The upper tensioning mechanism (1) is fixed to the top of the frame mechanism. The clamping assembly (5) is symmetrically installed at both ends of the frame system with the upper tensioning mechanism (1) as the central axis. The clamping assembly (5) includes: Positioning system: The positioning system includes an inner circular tube (501), an outer rectangular shell (502) and an inner expansion layer (9). The inner expansion layer (9), the inner circular tube (501) and the outer rectangular shell (502) are sequentially connected. The inner expansion layer (9) is located in the innermost layer and both ends of the connection are sealed by sealing plates. The inner circular tube (501) and the outer rectangular shell (502) form buffer cavities distributed at the four corners. An expansion cavity is formed between the inner expansion layer (9) and the inner circular tube (501). Pneumatic system: The pneumatic system includes a circulation pipe (7), an inlet pipe (503) and a control component. The circulation pipe (7) and the inlet pipe (503) work together to introduce external gas into the expansion chamber. The control component can detect the pneumatic pressure data and control the gas input rate.

2. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 1, characterized in that: Each clamping assembly (5) is provided with a positioning assembly (6). The inner expansion layer (9) is cylindrical and forms a clamping cavity through which the steel pipe can pass. The positioning assembly (6) includes a sliding frame (601), an air pump (602), a connecting column (605), a sliding plug (604), and a support roller (603). One end of the sliding frame (601) is slidably connected to the upper surface of the outer rectangular shell (502), and the other end is located on one side of the clamping assembly (5) and is fixedly installed with the air pump (602) and the connecting column (603). The column (605) is equipped with a cylindrical chamber. The air pump (602) can input gas into the cylindrical chamber. Four sets of sliding grooves (606) are equidistantly opened on the side wall of the cylindrical chamber. Each sliding groove (606) is slidably connected with a sliding plug (604). One end of the sliding plug (604) is located outside the connecting column (605), and the other end is fixedly connected to the support roller (603). Multiple sets of support rollers (603) can support the inner wall of the steel pipe and perform preliminary positioning of the steel pipe.

3. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 1, characterized in that: The main body of the circulation pipe (7) is a main connecting pipe (701) connected end to end. An external control valve (702) and an internal control valve (703) are provided on the main connecting pipe (701). The external control valve (702) and the internal control valve (703) are respectively installed at both ends of the circulation pipe (7). The internal control valve (703) is located inside the buffer chamber, while the external control valve (702) is located outside the outer rectangular shell (502). Each set of buffer chambers is provided with a circulation pipe (7). When the internal control valve (703) and the external control valve (702) are fully opened, the external gas of the outer rectangular shell (502) can be introduced into the buffer chamber. The inlet pipe (503) is fixedly installed in the inner circular pipe (501). The inner circular pipe (501) can introduce the gas in the buffer chamber into the expansion chamber.

4. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 1, characterized in that: The frame mechanism includes an upper column (2) and a lower support plate (3). The upper column (2) is fixedly installed in the middle position of the lower support plate (3). The upper tensioning mechanism (1) is fixedly installed at the upper end of the upper column (2). Both ends of the lower support plate (3) are slidably installed with clamp mounting frames (4). The clamping assembly (5) is fixedly installed on the clamp mounting frames (4). The upper tensioning mechanism (1) is provided with a driving mechanism and a tensioning rod. The tensioning rod is slidably connected between the two sets of upper columns (2). When the tensile strength is tested, the driving mechanism can drive the tensioning rod located below the steel pipe to move upward.

5. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 4, characterized in that: A connecting rod (8) is provided between the two sets of clamp mounting brackets (4). The length of the connecting rod (8) is adjustable. When the connecting rod (8) is extended, the clamp mounting brackets (4) at both ends can be equidistant from the upper column (2).

6. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 3, characterized in that: The control component includes: Detection Unit: The detection unit includes a pressure sensor and a valve body. Pressure sensors are installed in both the buffer chamber and the expansion chamber. The valve body is equipped with both a two-way valve and a one-way valve. The external control valve (702) and the internal control valve (703) are both one-way valves. The one-way valve allows external air to enter the buffer chamber through the circulation pipe (7). A two-way valve is installed on the inlet pipe (503). A pressure relief valve is installed on one side of the buffer chamber. The pressure relief valve can reduce the air pressure in the buffer chamber. Drive unit: The drive unit includes a control motherboard and a suction pump. The suction pump is fixedly installed on the circulation pipe (7). The control motherboard can analyze the air pressure information detected by the air pressure sensor and can control the opening and closing of the two-way valve and the one-way valve.

7. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 1, characterized in that: Multiple sets of anti-slip protrusions (901) are fixedly installed on the outer surface of the inner expansion layer (9). Multiple sets of concentric stress grooves (902) are opened on the inner expansion layer (9). The inner expansion layer (9) is provided with an elastic limit. When the inner expansion layer (9) reaches the elastic limit, it will no longer elongate.

8. The copper tube tensile strength and deformation real-time monitoring testing machine according to claim 2, characterized in that: A threaded assembly is rotatably mounted on the upper surface of the outer rectangular shell (502). The threaded assembly includes a threaded rod and a rotating motor. The threaded rod is threadedly connected to the upper end of the sliding frame (601). The rotating motor is fixedly mounted on one side of the outer rectangular shell (5), and its output end is fixedly connected to the threaded rod.

9. A real-time monitoring and testing machine for the tensile strength and deformation of copper tubes according to claim 4, characterized in that: The lower support plate (3) is provided with a positioning component, which includes a side threaded rod and a positioning locking block. The side threaded rod is rotatably connected to both sides of the lower support plate (3). The lower end of the positioning locking block is threadedly connected to the side threaded rod, and the upper end can extend and retract and can be locked into the bottom limiting groove of the clamp mounting frame (4) after extension and retraction.

10. A real-time monitoring and testing machine for the tensile strength and deformation of copper tubes according to claim 4, characterized in that: The drive mechanism includes two sets of hydraulic cylinders, which are fixedly installed inside the upper column (2). The two sets of hydraulic cylinders operate synchronously to lift the tension rod upward from both ends.

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