A pressure testing device and method for basalt fiber composite pipes

Abstract

This invention relates to the field of tube pressure testing technology, and in particular to a pressure testing device and method for basalt fiber composite tubes. The device includes a base plate, with a housing fixed to its upper side. Multiple sliding rods are slidably inserted into both sides of the housing. A vertical rod is fixed to one end of each sliding rod, and a movable rod is rotatably mounted at the upper end of each vertical rod. This invention allows the lead screw slider in the feeding mechanism to move linearly along with two trapezoidal push blocks on either side. During this movement, the two trapezoidal push blocks can sequentially apply opposing torques to the two movable rods in each group via a pressing mechanism. This sequentially causes the two pressure plates in each group to simultaneously apply pressure to both sides of the tube. For testing long tubes, this method can automatically and sequentially perform pressure tests on different sections of the tube without frequently switching the tube's position, reducing operational difficulty and significantly improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of tube pressure testing technology, and in particular to a pressure testing device and method for basalt fiber composite tubes. Background Technology

[0002] Basalt fiber composite materials, as a new type of material, have become a preferred choice for improving the pressure resistance and corrosion resistance of pipelines during the pipeline manufacturing process. In the production of basalt fiber composite pipes, pressure testing is required on the pipes before they leave the factory to ensure the stability of their pressure resistance during normal use.

[0003] A search revealed Chinese patent CN115791426B, which discloses a pressure testing device and method for basalt fiber composite pipes. This invention utilizes a set of horizontally guiding components capable of circumferentially rotating the composite pipe, along with a first lifting device and a thrust component below the pipe, and a pressing component above it. Simultaneously, a label reading mechanism, in conjunction with a readable information label affixed to the inner circumference of the composite pipe, precisely applies controllable pressure to the "node" positions around the pipe. A first pressure sensing module monitors the pipe deformation near the compression point in real time, effectively and accurately completing the pressure test on the periphery of the composite pipe. Furthermore, the axial guidance support of the shaft guide component and the forward movement of the composite pipe by a linear motor-driven guide shaft and propulsion frame enable a comprehensive and holistic pressure test of the entire novel material composite pipe.

[0004] However, the device can only perform a pressure test on a certain section of the composite tube at a time. Since the length of the basalt fiber composite tube is usually several meters long and it needs to be tested in batches, after each pressure test on one position of the basalt fiber composite tube, the position of the basalt fiber composite tube needs to be adjusted before testing other positions. This process is complicated and greatly reduces the efficiency of the pressure test of the basalt fiber composite tube. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure testing device and method for basalt fiber composite pipes to solve the problems mentioned in the background art.

[0006] The technical solution of the present invention is: a pressure testing device and method for basalt fiber composite tubes, comprising a base plate, a housing fixed on the upper side of the base plate, multiple sliding rods slidably inserted on both sides of the housing, a vertical rod fixed at one end of each sliding rod, and a movable rod rotatably disposed at the upper end of each vertical rod; further comprising an opening and closing mechanism for driving the multiple sliding rods to move, and a pushing mechanism for applying torsional torque to the multiple movable rods respectively; the pushing mechanism includes a second air cylinder rotatably connected to the sliding rod and a first air cylinder fixed on the upper side of the housing, a first push rod and a second push rod slidably inserted at one end of the first air cylinder and the second air cylinder respectively, a second push rod rotatably connected at one end of the second push rod to the lower end of the movable rod, and the first air cylinder and the second air cylinder being connected through a connecting pipe; further comprising a feeding mechanism for sequentially pushing the multiple first push rods to move.

[0007] Preferably, the feeding mechanism includes a second motor mounted on one end of the upper side of the housing. A lead screw is fixed to the driving end of the second motor. The end of the lead screw is rotatably connected to the other end of the upper side of the housing. A lead screw slider is threaded to the outer side of the lead screw. Two trapezoidal push blocks are symmetrically fixed on both sides of the lead screw slider. A slide bar is fixed to the upper side of the housing. The lower side of the lead screw slider is slidably adapted to the outer side of the slide bar.

[0008] Preferably, the opening and closing mechanism includes a motor installed at one end of the outer side of the housing, a plurality of first racks fixed to one end of a plurality of slide rods on one side, and a plurality of second racks fixed to one end of a plurality of slide rods on the other side. The drive end of the motor is fixed with a gear shaft extending to the inner side of the housing. A gear is fixed on the outer side of the gear shaft at the position corresponding to each first rack and second rack. Both sides of each gear mesh with the first rack and second rack at the corresponding positions, respectively.

[0009] Preferably, one end of the push rod is threadedly connected to an adjusting screw, one end of the adjusting screw is rotatably connected to a roller, and one end of the push rod is also rotatably connected to an adjusting nut. The adjusting nut is threadedly connected to the outside of the adjusting screw, and the outside of the adjusting screw is also provided with multiple guide grooves. The inside of the push rod is fixed with a protrusion that slides and adapts to the inside of the guide groove.

[0010] Preferably, one end of the push rod is fixed with a piston that is slidably connected to the inside of the air cylinder, and one end of the push rod is fixed with a piston that is slidably connected to the inside of the air cylinder. One end of the piston is elastically connected to the inside of the air cylinder through a return spring.

[0011] Preferably, the upper side of the base plate is also provided with a reversing mechanism for driving the tube body to rotate. The reversing mechanism includes two brackets fixed at both ends of the upper side of the base plate. Two support shafts are rotatably connected between the two brackets. A motor is installed on one side of one of the brackets. The drive end of the motor is fixedly connected to one end of one of the support shafts. A synchronous pulley is fixed to one end of each of the two support shafts. The two synchronous pulleys are connected by a synchronous belt drive.

[0012] Preferably, each of the movable rods has two guide blocks fixed at its upper end, and a guide rod is slidably connected through the interior of each of the two guide blocks. A pressure plate is fixed at one end of each of the two guide rods, and a pressure sensor is connected to one side of the pressure plate at the upper end of the movable rod.

[0013] Preferably, a pin is fixedly inserted through the interior of the movable rod, the pin is rotatably connected to the interior of the vertical rod, one end of the pin is fixed to an end plate, and one end of the end plate is elastically connected to the outside of the vertical rod by a torsion spring.

[0014] Preferably, a limiting groove is provided on one side of each of the vertical rods, and a limiting rod is fixed at the position corresponding to the limiting groove on each of the movable rods.

[0015] This invention also provides a pressure testing method for basalt fiber composite tubes, specifically including the following steps:

[0016] Step 1: Place the tube to be tested on the two support shafts of the reversing mechanism. Once the motor controlling the opening and closing mechanism starts running, it drives the gear shaft to rotate. The gear shaft drives multiple gears on its outer side to rotate. Each gear drives the first rack and the second rack to move in opposite directions through tooth meshing. Each first rack and the second rack drive two slide rods to move in opposite directions. The two slide rods drive the vertical rod, movable rod and pressure plate in opposite positions to merge. The multiple sets of opposite pressure plates can clamp the two sides of the tube.

[0017] Step 2: The motor 2 controlling the feed mechanism drives the lead screw to rotate. The lead screw drives the lead screw slider and the two trapezoidal push blocks on both sides to move linearly. Through the rolling cooperation between the roller and the inclined surface on one side of the trapezoidal push block, the inclined surface on one side of the trapezoidal push block can apply a horizontal thrust to the push rod 1, thereby causing the push rod 1 to move inward towards the inside of the air cylinder 1. At the same time, the push rod 1 drives the piston 1 at one end to move, compressing the air at one end of the inside of the air cylinder 1, compressing the air at one end of the inside of the air cylinder 1, one end of the inside of the air cylinder 2, and the inside of the connecting pipe. As the pressure increases, the air pressure acts on one end of piston two, applying a thrust to one end of push rod two. Push rod two then transmits the thrust to the lower end of the movable rod, which generates a rotational torque in the movable rod. This causes the upper end of the movable rod to apply pressure to one side of the tube body through the pressure plate. Since the lead screw and slider of the feeding mechanism move at a constant speed from one end to the other, during the movement, the pushing mechanism can sequentially apply opposite rotational torques to the two movable rods in each group, thereby sequentially causing the two pressure plates in each group to simultaneously apply pressure to both sides of the tube body.

[0018] Step 3: The motor in the reversing mechanism drives one of the support shafts to rotate. This support shaft drives a synchronous pulley at its end to rotate. This synchronous pulley drives another synchronous pulley to rotate synchronously via a synchronous belt, causing the other support shaft to rotate synchronously. When the two support shafts rotate synchronously, they drive the tube body to rotate, performing a reversing operation on the tube body. Then, by repeating the above steps, press tests are performed on different positions on the outside of the reversed tube body.

[0019] The present invention provides an improved pressure testing device and method for basalt fiber composite tubes, which, compared with the prior art, has the following improvements and advantages:

[0020] Firstly, this invention enables the lead screw slider in the feeding mechanism and the two trapezoidal push blocks on both sides to move linearly. During the movement, the two trapezoidal push blocks can apply opposite rotational torques to the two movable rods in each group through the pressing mechanism, thereby causing the two pressure plates in each group to simultaneously apply pressure to both sides of the tube. When the lead screw slider moves from one end to the other, it will cause the two pressure plates in each group to press the outer side of the tube once. When testing long tubes, pressure tests can be automatically performed on each section of the tube in sequence without frequently switching the position of the tube, reducing the difficulty of operation during testing and thus greatly improving testing efficiency.

[0021] Secondly, this invention uses a reversing mechanism to make the two support shafts rotate synchronously. When the two support shafts rotate synchronously, they can drive the tube body to rotate, thereby enabling the tube body to be reversed. Then, by going through the above steps again, the pressing test is performed on different positions on the outside of the tube body after reversal. This further simplifies the operation process in the test and enables the tube body angle to be switched quickly, thereby further improving the test efficiency. Attached Figure Description

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

[0023] Figure 1 This is a first-view structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the second perspective structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the third-view structure of the present invention;

[0026] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 5 This is a partial cross-sectional view of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0029] Figure 7 This is a schematic diagram of the structure in a partially disassembled state in this invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C;

[0031] Figure 9 This is a schematic diagram of the tube body under test conditions in this invention.

[0032] Figure label:

[0033] 1. Base plate; 2. Housing; 3. Slide rod; 4. Vertical rod; 5. Movable rod; 6. Pressure plate; 7. Pressure sensor; 8. Pin; 9. End plate; 10. Torsion spring; 11. Limiting rod; 12. Limiting groove; 13. Guide rod; 14. Guide block; 101. Motor 1; 102. Gear shaft; 103. Gear; 104. First rack; 105. Second rack; 201. Air cylinder 1; 202. Air cylinder 2; 203. Piston 2; 204. 205. Push rod 2; 206. Piston 1; 207. Push rod 1; 208. Roller; 209. Adjusting screw; 210. Adjusting nut; 211. Guide groove; 212. Connecting pipe; 213. Return spring; 301. Motor 2; 302. Lead screw; 303. Lead screw slider; 304. Trapezoidal push block; 305. Slide bar; 401. Bracket; 402. Motor 3; 403. Support shaft; 404. Synchronous pulley; 405. Synchronous belt. Detailed Implementation

[0034] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. 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.

[0035] This invention provides an improved pressure testing device and method for basalt fiber composite pipes. The technical solution of this invention is as follows:

[0036] Example 1: As Figures 1 to 9As shown, this embodiment of the invention provides a pressure testing device and method for basalt fiber composite pipes, including a base plate 1, a housing 2 fixed to the upper side of the base plate 1, multiple sliding rods 3 slidably inserted on both sides of the housing 2, a vertical rod 4 fixed to one end of each sliding rod 3, a movable rod 5 rotatably disposed at the upper end of each vertical rod 4, two guide blocks 14 fixed to the upper end of each movable rod 5, and a guide rod 13 slidably connected through the interior of each guide block 14, a pressure plate 6 fixed to one end of each guide rod 13, and a pressure sensor 7 connected to one side of the pressure plate 6 at the upper end of the movable rod 5. The device also includes an opening and closing mechanism for moving the multiple sliding rods 3, and a pushing mechanism for applying torsional torque to the multiple movable rods 5 respectively; the pushing mechanism includes a rotating connecting... The air cylinder 202 is attached to the slide rod 3, and the air cylinder 201 is fixed to the upper side of the housing 2. One end of the air cylinder 201 and the air cylinder 202 are respectively slidably inserted with the push rod 206 and the push rod 204. One end of the push rod 204 is rotatably connected to the lower end of the movable rod 5. The air cylinder 201 and the air cylinder 202 are connected by the connecting pipe 211. The system also includes a feeding mechanism that pushes multiple push rods 206 to move in sequence. One end of the push rod 206 is fixed with a piston 205 that is slidably connected to the inside of the air cylinder 201. One end of the push rod 204 is fixed with a piston 203 that is slidably connected to the inside of the air cylinder 202. One end of the piston 205 is elastically connected to the inside end of the air cylinder 201 through a return spring 212.

[0037] Furthermore, the feeding mechanism includes a second motor 301 installed on one end of the upper side of the housing 2. A lead screw 302 is fixed to the drive end of the second motor 301. The end of the lead screw 302 is rotatably connected to the other end of the upper side of the housing 2. A lead screw slider 303 is threadedly connected to the outer side of the lead screw 302. Two trapezoidal push blocks 304 are symmetrically fixed on both sides of the lead screw slider 303. A slide bar 305 is fixed on the upper side of the housing 2. The lower side of the lead screw slider 303 is slidably adapted to the outer side of the slide bar 305.

[0038] The screw slider 303 in the feeding mechanism drives the two trapezoidal push blocks 304 to move. As the two trapezoidal push blocks 304 move from one end of the screw 302 to the other, the pressing mechanism sequentially applies reverse torque to the two movable rods 5 in each group, thereby causing the two pressure plates 6 in each group to simultaneously apply pressure to both sides of the tube. When the screw slider 303 moves from one end to the other, the two pressure plates 6 in each group will press the outer side of the tube once. When testing long tubes, the pressure test can be automatically performed on each section of the tube in sequence without frequently switching the position of the tube, reducing the difficulty of operation during testing and thus greatly improving testing efficiency.

[0039] Furthermore, the opening and closing mechanism includes a motor 101 installed at one end of the outer side of the housing 2, a plurality of first racks 104 fixed at one end of a plurality of slide rods 3 on one side, and a plurality of second racks 105 fixed at one end of a plurality of slide rods 3 on the other side. The drive end of the motor 101 is fixed with a gear shaft 102 extending to the inner side of the housing 2. A gear 103 is fixed on the outer side of the gear shaft 102 at the position corresponding to each first rack 104 and second rack 105. Both sides of each gear 103 mesh with the first rack 104 and second rack 105 at the corresponding positions, respectively.

[0040] The motor 101 of the opening and closing mechanism drives the gear shaft 102 to rotate. The gear shaft 102 drives multiple gears 103 on its outer side to rotate. When each gear 103 rotates, it can drive the first rack 104 and the second rack 105 to move in opposite directions through tooth meshing. Each first rack 104 and the second rack 105 respectively drives two slide rods 3 to move in opposite directions. Therefore, when the gear shaft 102 drives multiple gears 103 to rotate synchronously, it can drive multiple relative slide rods 3 to move inward to the inside of the housing 2 at the same time, thereby driving the relative vertical rods 4, movable rods 5, and pressure plates 6 to merge. The merging of multiple sets of relative pressure plates 6 can clamp the two sides of the tube.

[0041] Furthermore, one end of the push rod 206 is threadedly connected to an adjusting screw 208, one end of the adjusting screw 208 is rotatably connected to a roller 207, and one end of the push rod 206 is also rotatably connected to an adjusting nut 209. The adjusting nut 209 is threadedly connected to the outside of the adjusting screw 208. Multiple guide grooves 210 are also provided on the outside of the adjusting screw 208. A protrusion that slides and adapts to the inside of the guide groove 210 is fixed on the inside of the push rod 206.

[0042] By rotating the adjusting nut 209, the adjusting nut 209 drives the adjusting screw 208 to extend and retract via the thread. When the adjusting screw 208 extends outward, the roller 207 can contact the inclined surface on one side of the trapezoidal push block 304 earlier, thereby pushing the push rod 206 to move a longer distance towards the inside of the air cylinder 201. Conversely, pushing the push rod 206 to move a shorter distance towards the inside of the air cylinder 201. When the moving distance is longer, the air pressure at one end of the inner side of the air cylinder 202 will be higher, resulting in a greater torsional torque applied to the movable rod 5, which in turn makes the pressure plate 6 apply greater pressure to the outside of the tube. At the same time, by comparing the pressure detection reading of the pressure sensor 7, the pressure applied by the pressure plate 6 to the outside of the tube during each pressing test can be quickly adjusted, improving the accuracy of the test data.

[0043] Furthermore, a reversing mechanism for driving the tube body to rotate is also provided on the upper side of the base plate 1. The reversing mechanism includes two brackets 401 fixed at both ends of the upper side of the base plate 1. Two support shafts 403 are rotatably connected between the two brackets 401. A motor 402 is installed on one side of one of the brackets 401. The driving end of the motor 402 is fixedly connected to one end of one of the support shafts 403. A synchronous pulley 404 is fixed to one end of each of the two support shafts 403. The two synchronous pulleys 404 are connected by a synchronous belt 405.

[0044] The reversing mechanism enables the two support shafts 403 to rotate synchronously. When the two support shafts 403 rotate synchronously, they can drive the tube body to rotate, thereby enabling the tube body to be reversed. Then, by repeating the above steps, the pressing test is performed on different positions on the outside of the tube body after reversal. This further simplifies the operation process in the test and enables the tube body angle to be switched quickly, thereby further improving the test efficiency.

[0045] Furthermore, a pin 8 is fixedly inserted through the interior of the movable rod 5. The pin 8 is rotatably connected inside the vertical rod 4. One end of the pin 8 is fixed with an end plate 9. One end of the end plate 9 is elastically connected to the outside of the vertical rod 4 through a torsion spring 10.

[0046] It should be noted that the pin 8 is fixed inside the movable rod 5 and is rotatably connected inside the vertical rod 4. The torsion spring 10 can apply a small torsional torque to the pin 8 through the end plate 9. The pin 8 transmits the torsional torque to the movable rod 5, so that the movable rod 5 generates a small torsional torque, which can make the limiting rod 11 at the lower end of the movable rod 5 fit tightly against the inner side of the limiting groove 12, thereby keeping the movable rod 5 and the vertical rod 4 on the same straight line. This ensures that each set of pressure plates 6 can apply equal or close pressure to the outside of the tube, improving the accuracy of the test.

[0047] Example 2: This example also provides a pressure testing method for basalt fiber composite pipes, specifically including the following steps:

[0048] Step 1: Place the tube to be tested on the two support shafts 403 of the reversing mechanism. Control the motor 101 of the opening and closing mechanism to drive the gear shaft 102 to rotate. The gear shaft 102 drives multiple gears 103 on its outer side to rotate. Each gear 103 drives the first rack 104 and the second rack 105 to move in opposite directions through tooth meshing. Each first rack 104 and the second rack 105 respectively drives two slide rods 3 to move in opposite directions. The two slide rods 3 respectively drive the vertical rod 4, the movable rod 5 and the pressure plate 6 in opposite positions to merge. The multiple sets of opposite pressure plates 6 can clamp the two sides of the tube.

[0049] Step 2: The motor 301 of the control feed mechanism drives the lead screw 302 to rotate. The lead screw 302 drives the lead screw slider 303 and the two trapezoidal push blocks 304 on both sides to move linearly. Through the rolling cooperation between the roller 207 and the inclined surface on one side of the trapezoidal push block 304, the inclined surface on one side of the trapezoidal push block 304 can apply a horizontal thrust to the push rod 206, thereby causing the push rod 206 to move inward towards the air cylinder 201. At the same time, the push rod 206 drives the piston 205 at one end to move, compressing the air at one end of the inner side of the air cylinder 201, so that the air at one end of the inner side of the air cylinder 201 and the air cylinder 201... The air pressure at one end of the inner side of the 2nd pipe and the inner side of the connecting pipe 211 increases. The air pressure acts on one end of the piston 203 and applies a thrust to one end of the push rod 204. The push rod 204 then transmits the thrust to the lower end of the movable rod 5, which generates a rotational torque on the movable rod 5. The upper end of the movable rod 5 applies pressure to one side of the tube body through the pressure plate 6. Since the lead screw slider 303 of the feeding mechanism moves from one end to the other end at a constant speed, during the movement, the pushing mechanism can apply reverse rotational torques to the two movable rods 5 in each group in sequence, thereby causing the two pressure plates 6 in each group to apply pressure to both sides of the tube body simultaneously.

[0050] Step 3: The motor 402 in the reversing mechanism drives one of the support shafts 403 to rotate. This support shaft 403 drives a synchronous pulley 404 at its end to rotate. This synchronous pulley 404 drives another synchronous pulley 404 to rotate synchronously through a synchronous belt 405, causing the other support shaft 403 to rotate synchronously. When the two support shafts 403 rotate synchronously, they drive the tube body to rotate, thus performing a reversing operation on the tube body. Then, by repeating the above steps, press tests are performed on different positions on the outside of the tube body after reversing.

[0051] Working principle: When testing the tube, the tube to be tested is placed on the two support shafts 403 of the reversing mechanism. Then, the motor 101 of the opening and closing mechanism drives the gear shaft 102 to rotate. The gear shaft 102 drives multiple gears 103 on its outer side to rotate. When each gear 103 rotates, it can drive the first rack 104 and the second rack 105 to move in opposite directions through tooth meshing. Each first rack 104 and the second rack 105 respectively drives two slide rods 3 to move in opposite directions. Therefore, when the gear shaft 102 drives multiple gears 103 to rotate synchronously, it can drive multiple slide rods 3 in opposite positions to move inward to the inside of the housing 2 at the same time, thereby driving the relative vertical rods 4, movable rods 5, and pressure plates 6 to merge. The multiple sets of pressure plates 6 in opposite positions can clamp the two sides of the tube. It should be noted that the motor 101 can precisely control the output torque, so that the multiple pressure plates 6 only apply a small pressure to the outside of the tube, which plays a preliminary positioning role. Moreover, the motor 101 has a brake self-locking function, which can prevent the gear shaft 102 from rotating in the opposite direction.

[0052] After multiple pressure plates 6 initially clamp and position the tube body on both sides, the motor 301 of the feeding mechanism is controlled to drive the lead screw 302 to rotate at a constant speed. The lead screw 302 drives the lead screw slider 303 to move linearly along the outer side of the slide bar 305 through the thread. The lead screw slider 303 then drives the two trapezoidal push blocks 304 on both sides to move linearly. Since the trapezoidal push block 304 has an isosceles trapezoidal structure, one side of the trapezoidal push block 304 has two symmetrical inclined surfaces. When one of the inclined surfaces is in contact with the pressing mechanism... When the roller 207 contacts, through the rolling engagement between the roller 207 and the inclined surface, the inclined surface on one side of the trapezoidal push block 304 can apply a horizontal thrust to the push rod 206 via the roller 207, thereby causing the push rod 206 to move inward toward the air cylinder 201. Simultaneously, the push rod 206 drives the piston 205 at one end to move. It should be noted that the inner end of the air cylinder 201, the inner end of the air cylinder 202, and the inner side of the connecting pipe 211 are all filled with air. When the push rod... When piston 205 moves, it compresses the air at one end of the inner side of cylinder 201, thereby increasing the air pressure at one end of cylinder 201, one end of cylinder 202, and the inner side of connecting pipe 211. The air pressure acts on one end of piston 203, thus applying a thrust to one end of push rod 204. Push rod 204 then transmits the thrust to the lower end of movable rod 5, causing movable rod 5 to generate a rotational torque. This causes the upper end of movable rod 5 to tend to rotate towards the position of the tube. The upper end of movable rod 5 applies pressure to one side of the tube through pressure plate 6. Since the two trapezoidal push blocks 304 on both sides of the lead screw slider 303 simultaneously apply a thrust to the two push rods 206 in opposite positions, one movable rod 5 in the opposite position also generates a rotational torque, causing one pressure plate 6 in the opposite position to press on the other side of the tube. By applying pressure to both sides of the tube through the two pressure plates 6 in opposite positions, a pressing test can be performed on a specified position of the tube.

[0053] Since the lead screw slider 303 of the feeding mechanism moves at a constant speed from one end to the other, during the movement, the pushing mechanism can sequentially apply reverse rotational torque to the two movable rods 5 in each group, thereby causing the two pressure plates 6 in each group to simultaneously apply pressure to both sides of the tube. When the lead screw slider 303 moves from one end to the other, it will cause the two pressure plates 6 in each group to press the outer side of the tube once. When testing long tubes, the pressure test can be automatically performed on each section of the tube in sequence without frequently switching the position of the tube, reducing the difficulty of operation during testing and thus greatly improving testing efficiency.

[0054] It can also control the operation of motor 402 in the reversing mechanism to drive one of the support shafts 403 to rotate. This support shaft 403 drives a synchronous pulley 404 at the end to rotate. This synchronous pulley 404 drives another synchronous pulley 404 to rotate synchronously through a synchronous belt 405, which in turn drives the other support shaft 403 to rotate synchronously. When the two support shafts 403 rotate synchronously, they can drive the tube body to rotate, thereby enabling the tube body to be reversed. Then, by repeating the above steps, the pressing test is performed on different positions on the outside of the tube body after reversal.

[0055] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure testing device for basalt fiber composite pipe, comprising a base plate (1), wherein a shell (2) is fixed on the upper side of the base plate (1), characterized in that: Multiple slide rods (3) are slidably inserted on both sides of the housing (2). A vertical rod (4) is fixed at one end of each slide rod (3). A movable rod (5) is rotatably provided at the upper end of each vertical rod (4). The housing (2) also includes an opening and closing mechanism that drives multiple slide rods (3) to move, and a pushing mechanism that applies torsional torque to multiple movable rods (5) respectively. The pushing mechanism includes a second air cylinder (202) rotatably connected to a slide rod (3) and a first air cylinder (201) fixed on the upper side of the housing (2). One end of the first air cylinder (201) and the second air cylinder (202) are respectively slidably inserted with a first push rod (206) and a second push rod (204). One end of the second push rod (204) is rotatably connected to the lower end of the movable rod (5). The first air cylinder (201) and the second air cylinder (202) are connected by a connecting pipe (211). It also includes a feed mechanism that sequentially moves multiple push rods (206); The feeding mechanism includes a second motor (301) installed on one end of the upper side of the housing (2). A lead screw (302) is fixed to the driving end of the second motor (301). The end of the lead screw (302) is rotatably connected to the other end of the upper side of the housing (2). A lead screw slider (303) is threadedly connected to the outer side of the lead screw (302). Two trapezoidal push blocks (304) are symmetrically fixed on both sides of the lead screw slider (303). A slide bar (305) is fixed on the upper side of the housing (2). The lower side of the lead screw slider (303) is slidably adapted to the outer side of the slide bar (305). The opening and closing mechanism includes a motor (101) installed on one side of the outer side of the housing (2), a plurality of first racks (104) fixed on one end of a plurality of slide rods (3) on one side, and a plurality of second racks (105) fixed on one end of a plurality of slide rods (3) on the other side. The drive end of the motor (101) is fixed with a gear shaft (102) extending to the inner side of the housing (2). A gear (103) is fixed on the outer side of the gear shaft (102) at the position corresponding to each first rack (104) and second rack (105). Both sides of each gear (103) mesh with the first rack (104) and second rack (105) at the corresponding positions.

2. The basalt fiber composite tube pressure testing device according to claim 1, characterized in that: One end of the push rod (206) is threadedly connected to an adjusting screw (208), and one end of the adjusting screw (208) is rotatably connected to a roller (207). One end of the push rod (206) is also rotatably connected to an adjusting nut (209). The adjusting nut (209) is threadedly connected to the outside of the adjusting screw (208). The outside of the adjusting screw (208) is also provided with multiple guide grooves (210). The inner side of the push rod (206) is fixed with a protrusion that slides and adapts to the inner side of the guide groove (210).

3. The basalt fiber composite tube pressure testing device according to claim 1, characterized in that: One end of the push rod (206) is fixed with a piston (205) that is slidably connected to the inside of the air cylinder (201). One end of the push rod (204) is fixed with a piston (203) that is slidably connected to the inside of the air cylinder (202). One end of the piston (205) is elastically connected to the inside end of the air cylinder (201) through a return spring (212).

4. The basalt fiber composite tube pressure testing device according to claim 1, characterized in that: The upper side of the base plate (1) is also provided with a reversing mechanism that drives the tube body to rotate. The reversing mechanism includes two brackets (401) fixed at both ends of the upper side of the base plate (1). Two support shafts (403) are rotatably connected between the two brackets (401). A motor (402) is installed on one side of one of the brackets (401). The driving end of the motor (402) is fixedly connected to one end of one of the support shafts (403). A synchronous pulley (404) is fixed at one end of each of the two support shafts (403). The two synchronous pulleys (404) are connected by a synchronous belt (405).

5. The basalt fiber composite tube pressure testing device according to claim 1, characterized in that: Each of the movable rods (5) has two guide blocks (14) fixed at its upper end. A guide rod (13) is slidably connected through the interior of each of the two guide blocks (14). A pressure plate (6) is fixed at one end of each of the two guide rods (13). A pressure sensor (7) is connected to one side of the pressure plate (6) at the upper end of the movable rod (5).

6. The basalt fiber composite tube pressure testing device according to claim 1, characterized in that: A pin (8) is fixed inside the movable rod (5). The pin (8) is rotatably connected inside the vertical rod (4). One end of the pin (8) is fixed with an end plate (9). One end of the end plate (9) is elastically connected to the outside of the vertical rod (4) through a torsion spring (10).

7. The basalt fiber composite tube pressure testing device according to claim 1, characterized in that: Each of the vertical rods (4) has a limiting groove (12) on one side, and each of the movable rods (5) has a limiting rod (11) fixed at the position corresponding to the limiting groove (12).

8. A pressure testing method for basalt fiber composite tubes, comprising the pressure testing apparatus and method for basalt fiber composite tubes according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Place the tube to be tested on the upper side of the two support shafts (403) of the reversing mechanism. Control the motor (101) of the opening and closing mechanism to drive the gear shaft (102) to rotate. The gear shaft (102) drives multiple gears (103) on its outer side to rotate. Each gear (103) drives the first rack (104) and the second rack (105) to move in opposite directions through tooth meshing. Each first rack (104) and the second rack (105) respectively drive the two slide rods (3) to move in opposite directions. The two slide rods (3) respectively drive the vertical rod (4), the movable rod (5), and the pressure plate (6) in the opposite position to merge. The multiple sets of opposite pressure plates (6) can clamp the two sides of the tube. Step 2: The motor 2 (301) controlling the feed mechanism drives the lead screw (302) to rotate. The lead screw (302) drives the lead screw slider (303) and the two trapezoidal push blocks (304) on both sides to move linearly. Through the rolling cooperation between the roller (207) and the inclined surface on one side of the trapezoidal push block (304), the inclined surface on one side of the trapezoidal push block (304) can apply a horizontal thrust to the push rod 1 (206), thereby causing the push rod 1 (206) to move inward to the air cylinder 1 (201). At the same time, the push rod 1 (206) drives the piston 1 (205) at one end to move and compress the air at one end of the inner side of the air cylinder 1 (201), so that the air cylinder 1 (201) and the air cylinder 1 (201) are compressed. The air pressure inside the second (202) and the inner side of the connecting pipe (211) increases. The air pressure acts on one end of the piston (203) and applies a thrust to one end of the push rod (204). The push rod (204) then transmits the thrust to the lower end of the movable rod (5), which can generate a rotational torque on the movable rod (5). The upper end of the movable rod (5) applies pressure to one side of the tube body through the pressure plate (6). Since the screw slider (303) of the feeding mechanism moves from one end to the other end at a constant speed, during the movement, the two movable rods (5) in each group can be applied in opposite directions by the pushing mechanism in sequence, so that the two pressure plates (6) in each group can apply pressure to both sides of the tube body at the same time. Step 3: The motor 3 (402) in the reversing mechanism drives one of the support shafts (403) to rotate. This support shaft (403) drives a synchronous pulley (404) at the end to rotate. This synchronous pulley (404) drives another synchronous pulley (404) to rotate synchronously through the synchronous belt (405), so that the other support shaft (403) rotates synchronously. When the two support shafts (403) rotate synchronously, they drive the tube body to rotate, and the tube body is reversed. Then, the above steps are repeated to press the different positions on the outside of the tube body after reversal.

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