Geogrid performance detection equipment

Abstract

The invention discloses geogrid performance detection equipment, and relates to the technical field of geogrid performance detection.The geogrid performance detection equipment comprises an equipment body, an air blowing plate is arranged in the middle of the front end of an inner cavity of the equipment body, a first guide plate is arranged on one side of the front end of the inner cavity of the equipment body, and a second guide plate is arranged on the other side of the front end of the inner cavity of the equipment body; the air blowing plate, the first guide plate and the second guide plate divide an inner cavity of the equipment body into a first detection cavity, a second detection cavity and a power cavity, and the middle of the power cavity is movably connected with a lead screw. According to the geogrid performance detection equipment, tensile force can be applied to the geogrid in the first detection cavity or the geogrid in the second detection cavity through the lead screw, so that when the equipment is used, the equipment does not need to wait for resetting of the upper clamp, the equipment can be continuously used, and the working efficiency is improved. The same power source is adopted by the two clamping fixtures to apply pulling force, and interference in the geogrid performance testing process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of geogrid performance detection, in particular to geogrid performance detection equipment. Background Art

[0002] The grid is a two-dimensional grid or a three-dimensional grid screen with a certain height made of high molecular polymers such as polypropylene and polyvinyl chloride through thermoplasticization or molding. When used in civil engineering, it is called a geogrid. Geogrids have high strength, low creep, and are adaptable to various environmental soils. They can meet the needs of high retaining walls in high-grade highways. Geogrids can effectively improve the interlocking and biting effects of the reinforced bearing surface, greatly enhance the bearing capacity of the foundation, effectively restrain the lateral displacement of the soil, and enhance the stability of the foundation. Since geogrids are widely used in actual engineering, their performance testing is particularly important.

[0003] The tensile strength of geogrid is an important performance indicator of geogrid. In related technologies, a tensile testing machine is usually used to measure the tensile strength of the geogrid. At present, the use method of the tensile testing machine is generally as follows: the sample is clamped between two clamps, and then tension or pressure is applied. The applied force and the deformation of the sample are monitored in real time by the sensor, and the control system records the data and analyzes it. By applying different loads and measuring the strain and stress of the sample, the stress-strain curve of the material can be drawn, and then the strength, toughness and other mechanical properties of the material can be evaluated. Since the tensile strength of the grid usually requires multiple measurements, and the existing tensile testing machine needs to wait for the clamp to be reset after each use before it can continue to be used, which reduces work efficiency; during use, broken debris is easy to splash around, increasing the risk of equipment damage and increasing the difficulty of cleaning. Based on this, the present application proposes a geogrid performance testing device. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a geogrid performance testing device, which solves the problem that the existing tensile testing machine proposed in the above background technology needs to wait for the clamp to be reset after each use before it can continue to be used; during use, broken debris is easy to splash everywhere, increasing the risk of equipment damage and increasing the difficulty of cleaning.

[0005] The present invention provides the following technical solutions: a geogrid performance testing device, comprising a device body, a blowing plate is provided in the middle of the front end of the inner cavity of the device body, a guide plate 1 is provided on one side of the front end of the inner cavity of the device body, and a guide plate 2 is provided on the other side of the front end of the inner cavity of the device body, the blowing plate, the guide plate 1 and the guide plate 2 divide the inner cavity of the device body into a testing cavity 1, a testing cavity 2 and a power cavity, a screw rod is movably connected in the inner cavity of the power cavity, a lower clamp is provided in the middle of the bottom end of the guide plate 1 and the guide plate 2, a guide groove is provided in the middle of the guide plate 1 and the guide plate 2, an upper clamp is movably connected in the inner cavity of the guide groove, and the upper clamp in the testing cavity 1 is connected to the upper clamp after The end is connected to a connecting rod 1 through a tension sensor, the other end of the connecting rod 1 is connected to a double-headed cylinder 1, and the two output shaft ends of the double-headed cylinder 1 are fixedly connected to an opening and closing block 1, a semicircular hole 1 is provided in the middle of the inner side of the opening and closing block 1, and the inner wall of the circular cavity formed by the two semicircular holes is provided with an internal thread that matches the screw rod; the rear end of the upper clamp in the detection cavity 2 is connected to a connecting rod 2 through another tension sensor, the other end of the connecting rod 2 is connected to a double-headed cylinder 2, and the two output shaft ends of the double-headed cylinder 2 are fixedly connected to an opening and closing block 2, a semicircular hole 2 is provided in the middle of the inner side of the opening and closing block 2, and the inner wall of the circular cavity formed by the two semicircular holes is provided with an internal thread that matches the screw rod.

[0006] Preferably, a pressure relief valve is provided at the top of the inner cavity of both the detection chamber one and the detection chamber two, a through hole is provided on the side of both the detection chamber one and the detection chamber two, a collection box is provided on the outer side of the through hole, and the collection box is arranged opposite to the blowing plate; an opening and closing door is provided at the front end of both the detection chamber one and the detection chamber two.

[0007] Preferably, a blowing structure is provided on one side of the power cavity, and the blowing structure includes a blower and a constant temperature water tank. A heat exchange tube is provided in the inner cavity of the constant temperature water tank, and the air inlet end of the heat exchange tube is connected to the air outlet end of the blower. The air inlet end of the blower is fixedly connected to the air inlet pipe, and the other end of the air inlet pipe extends to the outside of the equipment body. A connecting pipe is fixedly connected to one side of the inner cavity of the blowing plate, and the other end of the heat exchange tube is connected to the connecting pipe.

[0008] Preferably, a servo motor 1 is fixedly connected in the power cavity, and the screw rod is driven by the servo motor 1.

[0009] Preferably, a positioning block is fixedly connected to the bottom end of the inner cavity of the guide groove, and the positioning block is connected to the bottom of the inner cavity of the guide groove via a telescopic plate. Grooves are provided on both sides of the top end of the inner cavity of the guide groove, and an electric telescopic rod is fixedly connected to the inner cavity of the groove. A sealing plate is fixedly connected to the end of the output shaft of the electric telescopic rod, and the sealing plate is movably connected to the inner cavity of the groove. When the upper clamp contacts the positioning block, the top of the upper clamp and the bottom of the sealing plate are at the same height.

[0010] Preferably, the bottom of the upper clamp is fixedly connected with an electromagnet 1 and a buffer pad, and the top of the positioning block is fixedly connected with an electromagnet 2.

[0011] Preferably, the upper clamp and the lower clamp each include a clamp body, a positioning plate connected to the side of the clamp body away from the screw rod, and a pressure plate movably connected to the positioning plate, the pressure plate is located on the side of the clamp body away from the screw rod, the pressure plate is connected to the clamp body through a connecting structure, the clamp body in the upper clamp is movably connected to the guide groove, and the clamp body in the lower clamp is fixedly connected to guide plate one or guide plate two.

[0012] Preferably, the connecting structure includes a ball screw connected to the side of the clamp body away from the positioning block, a ball nut connected to the outer ring thread of the ball screw, a rotating shaft movably connected to the ball nut, a servo motor 2 fixedly connected to the ball nut, and a servo motor 3 fixedly connected to the side of the clamp body away from the positioning block, the output shaft end of the servo motor 2 is fixedly connected to the rotating shaft, the rotating shaft is fixedly connected to the pressure plate, and the ball screw is driven by the servo motor 3.

[0013] Preferably, the positioning plate is L-shaped, the horizontal end of the positioning plate is located on the side of the fixture body away from the positioning block, and the vertical end of the positioning plate is located on the side of the fixture body away from the blowing plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The structure formed by the screw rod and the two opening and closing blocks 1 or the structure formed by the two opening and closing blocks 2 can be quickly threaded or separated, so that when the device is in use, the screw rod can alternately apply tension to the geogrid in the detection chamber 1 or the geogrid in the detection chamber 2, so that when the device is in use, there is no need to wait for the upper clamp on one side to reset before the next test. The device can be used continuously to improve work efficiency. The two clamping fixtures use the same power source to apply tension, reducing interference during geogrid performance testing.

[0015] 2. The geogrid performance testing equipment, through the setting of the blowing structure and the blowing plate, the operation of the blower enables the blowing plate to blow out constant temperature air. The constant temperature air is blown onto the sample, and the sample temperature can be regulated to avoid the accuracy of the test result being affected by the change in sample temperature. When the sample is broken, the constant temperature air can change the movement trajectory of the debris, concentrate the debris, facilitate the cleaning of the debris, and reduce the interference of the debris, so as to facilitate the use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front schematic diagram of the structure of the present invention; Figure 2It is a schematic diagram of the back side of the structure of the present invention; Figure 3 The structure of the present invention Figure 2 Schematic cross-section; Figure 4 It is a schematic cross-sectional view of the structure of the present invention; Figure 5 This is a schematic diagram of the connection between the first connecting rod and the upper clamp of the structure of the present invention; Figure 6 It is a schematic diagram of the connection between the structural clamping fixture and the second guide plate of the present invention; Figure 7 The structure of the present invention Figure 6 Explosion diagram; Figure 8 This is a schematic diagram of the connection between the second connecting rod and the upper clamp of the structure of the present invention; Fig. 9 This is a bottom view schematic diagram of the second connecting rod of the structure of the present invention; Fig.10 It is a schematic diagram of the explosion of the clamp on the structure of the present invention.

[0017] In the figure: 1. Equipment body; 2. Blowing plate; 3. Guide plate 1; 4. Through hole; 5. Opening and closing door; 6. Pressure relief valve; 7. Collecting box; 8. Connecting pipe; 9. Telescopic plate; 10. Positioning block; 11. Guide plate 2; 12. Constant temperature water tank; 13. Blower; 14. Air inlet pipe; 15. Heat exchange pipe; 16. Servo motor 1; 17. Screw rod; 18. Sealing plate; 19. Guide groove; 20. Double-head cylinder 2; 21. Opening and closing block 2; 2 2. Fixture body; 23. Electromagnet 2; 24. Electric telescopic rod; 25. Connecting rod 2; 26. Electromagnet 1; 27. Pressure plate; 28. Rotating shaft; 29. ​​Servo motor 2; 30. Ball nut; 31. Servo motor 3; 32. Ball screw; 33. Positioning plate; 34. Opening and closing block 1; 35. Double-headed cylinder 1; 36. Connecting rod 1; 37. Detection chamber 1; 38. Detection chamber 2; 39. Power chamber; 40. Tension sensor. DETAILED DESCRIPTION

[0018] 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.

[0019] The present application provides a geogrid performance testing device, including a device body 1, a blowing plate 2 is provided in the middle of the front end of the inner cavity of the device body 1, a guide plate 1 3 is provided on one side of the front end of the inner cavity of the device body 1, and a guide plate 2 11 is provided on the other side of the front end of the inner cavity of the device body 1. The blowing plate 2, guide plate 1 3 and guide plate 2 11 divide the inner cavity of the device body 1 into a detection cavity 1 37, a detection cavity 2 38 and a power cavity 39.

[0020] The inner cavities of both the detection chamber 1 37 and the detection chamber 2 38 are provided with clamping fixtures. When the geogrid is tested for performance using the equipment, the geogrid sample is clamped and fixed by the clamping fixture. The clamping fixture includes an upper fixture and a lower fixture. The middle of the bottom ends of the guide plate 1 3 and the guide plate 2 11 are provided with a lower fixture. The middle of the guide plate 1 3 and the guide plate 2 11 are provided with a guide groove 19. The inner cavity of the guide groove 19 is movably connected with the upper fixture. The inner cavity of the power chamber 39 is movably connected with the screw 17. The power chamber 39 is fixedly connected with the servo motor 16. The end of the output shaft of the servo motor 16 is connected to the screw 17 through a reducer. The screw 17 is driven by the servo motor 16, and the servo motor 16 can drive the screw 17 to rotate.

[0021] The rear end of the upper clamp in the detection cavity 37 is connected to a connecting rod 36 through a tension sensor 40, and the other end of the connecting rod 36 is connected to a double-headed cylinder 35. The two output shaft ends of the double-headed cylinder 35 are fixedly connected to an opening and closing block 34. The screw rod 17 is located between the two opening and closing blocks 34. A semicircular hole 1 is provided in the middle of the inner side of the opening and closing block 34, and the inner wall of the circular cavity formed by the two semicircular holes is provided with an internal thread adapted to the screw rod 17. The extension and contraction of the double-headed cylinder 35 can change the position of the opening and closing block 34. When the two opening and closing blocks 34 are tightly fitted, the structure formed by the two opening and closing blocks 34 is in a threaded connection with the screw rod 17. When the screw rod 17 rotates, the two opening and closing blocks 34 can drive the connecting rod 36 to move, and the connecting rod 36 can drive the upper clamp away from the lower clamp through the tension sensor 40, thereby The clamping fixture can stretch the geogrid, and the tension sensor 40 can be used to measure the force applied to the geogrid; the rear end of the upper clamp in the detection cavity 38 is connected to a connecting rod 25 through another tension sensor 40, and the other end of the connecting rod 25 is connected to a double-headed cylinder 20, and the two output shaft ends of the double-headed cylinder 20 are fixedly connected to an opening and closing block 21, and a semicircular hole 2 is provided in the middle of the inner side of the opening and closing block 21, and the inner wall of the circular cavity formed by the two semicircular holes 2 is provided with an internal thread adapted to the screw rod 17, and the extension and contraction of the double-headed cylinder 20 can change the position of the opening and closing block 21 connected thereto, and when the two opening and closing blocks 21 are in contact, the structure formed by the two opening and closing blocks 21 is in a threaded connection state with the screw rod 17, and when the screw rod 17 rotates, the two opening and closing blocks 21 can drive the upper clamp connected thereto to move upward.

[0022] It can be known from the above description that the structure formed by the screw rod 17 and the two opening and closing blocks 1 34 or the structure formed by the two opening and closing blocks 21 can be quickly threaded or separated, so that when the device is in use, the screw rod 17 can be used to apply tension to the geogrid in the detection chamber 1 37 or the geogrid in the detection chamber 2 38, so as to facilitate the use of the device to measure the tensile strength of the geogrid. Therefore, when the device is in use, the detection chambers on both sides can work alternately, and there is no need to wait for the upper clamp on one side to reset before the next detection. The device can be used continuously to improve work efficiency.

[0023] A positioning block 10 is fixedly connected to the bottom end of the inner cavity of the guide groove 19, and the positioning block 10 is connected to the bottom of the inner cavity of the guide groove 19 through a telescopic plate 9. The positioning block 10 can limit the upper clamp so that the distance between the upper clamp and the lower clamp can be kept fixed, which is convenient for the user to use the clamping clamp to clamp and fix the geogrid to be tested. Grooves are provided on both sides of the top of the inner cavity of the guide groove 19, and an electric telescopic rod 24 is fixedly connected to the inner cavity of the groove. The end of the output shaft of the electric telescopic rod 24 is fixedly connected to a sealing plate 18, and the sealing plate 18 is movably connected to the inner cavity of the groove. When the upper clamp contacts the positioning block 10, the top of the upper clamp and the bottom of the sealing plate 18 are at the same height. At this time, the extension and retraction of the electric telescopic rod 24 can change the position of the sealing plate 18 connected thereto. When the two sealing plates 18 are fitted, the sealing plate 18 can seal the gap between the detection chamber 1 37 or the detection chamber 2 38 and the power chamber 39. At this time, the detection chamber 1 37 and the detection chamber 2 38 are in a sealed state, which is convenient for the replacement of the sample.

[0024] The bottom of the upper clamp is fixedly connected with an electromagnet 26 and a buffer pad, the material of the buffer pad can be rubber, and the top of the positioning block 10 is fixedly connected with an electromagnet 23. When the directions of the currents passed through the electromagnets 26 and 23 are the same, the electromagnets 26 and 23 are in a state of magnetic repulsion, which is beneficial to the repulsive force between the two, and can reduce the free fall speed of the upper clamp, thereby reducing the impact force when the upper clamp contacts the positioning block 10.

[0025] The upper clamp and the lower clamp both include a clamp body 22, a positioning plate 33 connected to the side of the clamp body 22 away from the screw rod 17, and a pressing plate 27 movably connected to the positioning plate 33. The pressing plate 27 is located on the side of the clamp body 22 away from the screw rod 17. The pressing plate 27 is connected to the clamp body 22 through a connecting structure. The clamp body 22 in the upper clamp is movably connected to the guide groove 19, and the clamp body 22 in the lower clamp is fixedly connected to the guide plate 13 or the guide plate 211. The positioning plate 33 is L-shaped, and the horizontal end of the positioning plate 33 is located on the side of the clamp body 22 away from the positioning block 10, and the vertical end of the positioning plate 33 is located on the side of the clamp body 22 away from the blowing plate 2.

[0026] The connection structure includes a ball screw 32 connected to the side of the fixture body 22 away from the positioning block 10, a ball nut 30 connected to the outer ring of the ball screw 32 by threading, a rotating shaft 28 movably connected to the ball nut 30, a servo motor 29 fixedly connected to the ball nut 30, and a servo motor 31 fixedly connected to the side of the fixture body 22 away from the positioning block 10. The end of the output shaft of the servo motor 29 is fixedly connected to the rotating shaft 28, and the rotating shaft 28 is fixedly connected to the pressure plate 27. When the servo motor 29 rotates, the pressure plate 27 can be driven to rotate through the rotating shaft 28 to facilitate the placement of the sample. The ball screw 32 is driven by the servo motor 31. The operation of the servo motor 31 can drive the rotation of the ball screw 32 connected thereto. The rotation of the ball screw 32 changes the distance between the pressure plate 27 and the fixture body 22. The pressure plate 27 can press the geogrid sample to clamp and fix the sample.

[0027] From the above description, it can be known that the positioning plate 33 can be used to position the sample to be tested, so that the clamping position of the sample can be kept consistent and the error can be reduced, and the position of the pressing plate 27 can be changed by the connecting structure, and the pressing plate 27 can press the sample to fix the sample.

[0028] A blowing structure is provided on one side of the power chamber 39, and the blowing structure includes a blower 13 and a constant temperature water tank 12. A heat exchange tube 15 is provided in the inner cavity of the constant temperature water tank 12. The air inlet end of the heat exchange tube 15 is connected to the air outlet end of the blower 13. The air inlet end of the blower 13 is fixedly connected to an air inlet pipe 14. The other end of the air inlet pipe 14 extends to the outside of the equipment body 1. A connecting pipe 8 is fixedly connected to one side of the inner cavity of the blowing plate 2. The other end of the heat exchange tube 15 is connected to the connecting pipe 8. Through the setting of the blowing structure, the operation of the blower 13 can blow the outside air The air enters the heat exchange tube 15, and the air exchanges heat with the surrounding constant temperature water during the flow in the heat exchange tube 15. The constant temperature air enters the inner cavity of the blowing plate 2 through the connecting tube 8. The air in the inner cavity of the blowing plate 2 is sprayed into the detection cavity 1 37 and the detection cavity 2 38 through the spray holes arranged on the side wall thereof. The constant temperature air sprayed onto the sample can adjust the temperature of the sample to keep the sample temperature unchanged, thereby reducing the use error of the equipment. The constant temperature air sprayed onto the sample can blow away the debris generated when the sample breaks, thereby avoiding the debris from splashing everywhere and facilitating the cleaning of the debris.

[0029] A pressure relief valve 6 is provided at the top of the inner cavity of both the detection chamber 1 37 and the detection chamber 2 38, and the pressure relief valve 6 can be used to discharge excess gas in the equipment. A through hole 4 is provided on the side of both the detection chamber 1 37 and the detection chamber 2 38, and a collecting box 7 is provided on the outer side of the through hole 4. The collecting box 7 is arranged opposite to the blowing plate 2, and debris can be collected by the collecting box 7; an opening and closing door 5 is provided at the front end of the detection chamber 1 37 and the detection chamber 2 38, and the opening and closing door 5 is made of transparent material, which can be tempered glass, so that the user can observe the detection process of the geogrid.

[0030] Among them, the electrical components involved in this application are all existing technologies, and technical personnel in this field understand their connection methods. Through these personnel, all electrical components in this application are connected to their compatible power supplies through wires, and according to actual conditions, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order between each electrical component, and the detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0031] To summarize, when the present application is used, a clamping fixture is used to clamp and fix the geogrid sample to be tested. The specific operation is as follows: servo motor 29 drives the pressure plate 27 connected thereto to rotate until the pressure plate 27 is in a horizontal state. At this time, the area of ​​the fixture body 22 wrapped by the positioning plate 33 leaks out, and the user places the sample between the upper fixture and the lower fixture, and the end of the sample is in contact with the fixture body 22, the horizontal end of the positioning plate 33 and the vertical end of the positioning plate 33. After the sample is placed, servo motor 29 drives the pressure plate 27 to rotate in the opposite direction until the pressure plate 27 is reset, and servo motor 31 drives the ball screw 32 connected thereto to rotate. The rotation of the ball screw 32 makes the pressure plate 27 gradually approach the fixture body 22 until the pressure plate 27 is tightly fitted with the sample, thereby achieving clamping and fixing of the sample. During the sample placement process, the electric telescopic rod 24 drives the sealing plate 18 connected thereto to move until the two sealing plates 18 are in a tightly fitted state. At this time, the detection chamber 1 37 and the detection chamber 2 38 are independent of each other, avoiding the sample being tested from being affected during the sample placement process.

[0032] When the upper clamp needs to be moved by the screw rod 17, the double-headed cylinder 1 35 or the double-headed cylinder 20 adapted to the upper clamp to be moved works until the two opening and closing blocks 1 34 or the two opening and closing blocks 21 are tightly fitted, and the structure formed by the two opening and closing blocks 1 34 or the two opening and closing blocks 21 is in a threaded connection with the screw rod 17. The servo motor 16 drives the screw rod 17 to rotate, and the screw rod 17 can drive the connecting rod 1 36 or the connecting rod 25 to move through the structure threadedly connected thereto. The connecting rod 1 36 or the connecting rod 25 drives the upper clamp to move through the tension sensor 40 connected thereto, and the geogrid sample can be stretched. The equipment can detect the tensile strength of the geogrid.

[0033] And during the detection process, the blower 13 works, and the operation of the blower 13 enables the blowing plate 2 to blow out constant temperature air. The constant temperature air is blown onto the sample, which can regulate the temperature of the sample to avoid affecting the accuracy of the detection result due to the change in sample temperature. When the sample is broken, the constant temperature air can change the movement trajectory of the debris, concentrate the debris, and facilitate the cleaning of the debris.

[0034] After the test is completed, the double-headed cylinder 1 35 or the double-headed cylinder 20 works to release the connection with the screw 17. Under the action of gravity, the upper clamp performs free fall motion, and the current directions passed through the electromagnet 1 26 and the electromagnet 2 23 are the same. The magnetic repulsion force between the electromagnet 1 26 and the electromagnet 2 23 reduces the falling speed of the upper clamp, thereby reducing the impact force between the upper clamp and the positioning block 10. During the resetting process of the upper clamp, the double-headed cylinder 20 or the double-headed cylinder 1 35 works, so that the screw 17 can drive the other upper clamp to move. The device can apply tension to the geogrid clamped by another clamping clamp. The device can work continuously to improve the working efficiency of the device.

[0035] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A geogrid performance testing device, comprising a device body (1), characterized in that: A blowing plate (2) is provided in the middle of the front end of the inner cavity of the device body (1), a guide plate 1 (3) is provided on one side of the front end of the inner cavity of the device body (1), and a guide plate 2 (11) is provided on the other side of the front end of the inner cavity of the device body (1), the blowing plate (2), the guide plate 1 (3) and the guide plate 2 (11) divide the inner cavity of the device body (1) into a detection cavity 1 (37), a detection cavity 2 (38) and a power cavity (39), a screw rod (17) is movably connected in the inner cavity of the power cavity (39), a lower clamp is provided in the middle of the bottom end of both the guide plate 1 (3) and the guide plate 2 (11), a guide groove (19) is provided in the middle of both the guide plate 1 (3) and the guide plate 2 (11), an upper clamp is movably connected in the inner cavity of the guide groove (19), and the rear end of the upper clamp in the detection cavity 1 (37) is connected through a tension sensor (40 ) is connected to a connecting rod 1 (36), the other end of the connecting rod 1 (36) is connected to a double-headed cylinder 1 (35), the two output shaft ends of the double-headed cylinder 1 (35) are fixedly connected to an opening and closing block 1 (34), a semicircular hole 1 is provided in the middle of the inner side of the opening and closing block 1 (34), and the inner wall of the circular cavity formed by the two semicircular holes is provided with an internal thread that matches the screw rod (17); the rear end of the upper clamp in the detection cavity 2 (38) is connected to a connecting rod 2 (25) through another tension sensor (40), the other end of the connecting rod 2 (25) is connected to a double-headed cylinder 2 (20), the two output shaft ends of the double-headed cylinder 2 (20) are fixedly connected to an opening and closing block 2 (21), a semicircular hole 2 is provided in the middle of the inner side of the opening and closing block 2 (21), and the inner wall of the circular cavity formed by the two semicircular holes is provided with an internal thread that matches the screw rod (17).

2. A geogrid performance testing device according to claim 1, characterized in that: A pressure relief valve (6) is provided at the top of the inner cavity of both the detection chamber 1 (37) and the detection chamber 2 (38); a through hole (4) is provided on the side of both the detection chamber 1 (37) and the detection chamber 2 (38); a collection box (7) is provided on the outer side of the through hole (4); the collection box (7) is arranged opposite to the blowing plate (2); and an opening and closing door (5) is provided at the front end of both the detection chamber 1 (37) and the detection chamber 2 (38).

3. The geogrid performance testing device according to claim 1, characterized in that: A blowing structure is provided on one side of the power cavity (39), the blowing structure comprising a blower (13) and a constant temperature water tank (12), a heat exchange tube (15) is provided in the inner cavity of the constant temperature water tank (12), the air inlet end of the heat exchange tube (15) is connected to the air outlet end of the blower (13), the air inlet end of the blower (13) is fixedly connected to an air inlet tube (14), the other end of the air inlet tube (14) extends to the outside of the equipment body (1), a connecting tube (8) is fixedly connected to one side of the inner cavity of the blowing plate (2), and the other end of the heat exchange tube (15) is connected to the connecting tube (8).

4. The geogrid performance testing device according to claim 1, characterized in that: A servo motor 1 (16) is fixedly connected to the power chamber (39), and the screw rod (17) is driven by the servo motor 1 (16).

5. The geogrid performance testing device according to claim 1, characterized in that: A positioning block (10) is fixedly connected to the bottom end of the inner cavity of the guide groove (19); the positioning block (10) is connected to the bottom of the inner cavity of the guide groove (19) via a telescopic plate (9); grooves are provided on both sides of the top end of the inner cavity of the guide groove (19); an electric telescopic rod (24) is fixedly connected to the inner cavity of the groove; a sealing plate (18) is fixedly connected to the end of the output shaft of the electric telescopic rod (24); the sealing plate (18) is movably connected to the inner cavity of the groove; and when the upper clamp contacts the positioning block (10), the top of the upper clamp and the bottom of the sealing plate (18) are at the same height.

6. A geogrid performance testing device according to claim 5, characterized in that: The bottom of the upper clamp is fixedly connected to an electromagnet 1 (26) and a buffer pad, and the top of the positioning block (10) is fixedly connected to an electromagnet 2 (23).

7. A geogrid performance testing device according to claim 6, characterized in that: The upper clamp and the lower clamp both comprise a clamp body (22), a positioning plate (33) connected to the side of the clamp body (22) away from the screw rod (17), and a pressure plate (27) movably connected to the positioning plate (33), wherein the pressure plate (27) is located on the side of the clamp body (22) away from the screw rod (17), and the pressure plate (27) is connected to the clamp body (22) via a connecting structure, the clamp body (22) in the upper clamp is movably connected to the guide groove (19), and the clamp body (22) in the lower clamp is fixedly connected to the guide plate one (3) or the guide plate two (11).

8. The geogrid performance testing device according to claim 7, characterized in that: The connection structure comprises a ball screw (32) connected to the side of the clamp body (22) away from the positioning block (10), a ball nut (30) connected to the outer ring thread of the ball screw (32), a rotating shaft (28) movably connected to the ball nut (30), a servo motor 2 (29) fixedly connected to the ball nut (30), and a servo motor 3 (31) fixedly connected to the side of the clamp body (22) away from the positioning block (10), the output shaft end of the servo motor 2 (29) is fixedly connected to the rotating shaft (28), the rotating shaft (28) is fixedly connected to the pressure plate (27), and the ball screw (32) is driven by the servo motor 3 (31).

9. The geogrid performance testing device according to claim 7, characterized in that: The positioning plate (33) is L-shaped, the horizontal end of the positioning plate (33) is located on a side of the clamp body (22) away from the positioning block (10), and the vertical end of the positioning plate (33) is located on a side of the clamp body (22) away from the blowing plate (2).

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