Water pressure testing equipment for pressure resistance detection of steel pipe and testing method of water pressure testing equipment

Abstract

The invention discloses a water pressure testing device for steel pipe compression resistance detection and a testing method thereof.The device comprises a supporting assembly, a moving assembly and a fixed sealing assembly, the supporting assembly comprises a base and a pair of supporting frames fixedly connected with the top of the base, and the moving assembly is arranged above the base; the moving assembly is arranged on the base and fixedly connected with the base, and the fixed sealing assembly is connected with the moving assembly, used for fixing the steel pipe and capable of sealing the two ends of the steel pipe. The driving motor drives the positive and negative screw rod to rotate, so that the pair of moving plates move in opposite directions, the abutting blocks can abut against the inner wall of the steel pipe in the opposite moving process of the moving plates, the steel pipe can be stabilized through the abutting effect of the abutting blocks, the displacement phenomenon of the steel pipe during water pressure testing is avoided, and when the moving plates move, the steel pipe is prevented from moving. The steel pipe can be subjected to double-layer sealing, the sealing effect is good, and the accuracy of a test result can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe detection, and in particular to a water pressure testing device and a testing method thereof for steel pipe compression resistance testing. Background Art

[0002] With the booming industrial sector, steel pipes are increasingly used in construction, transportation and many other industrial fields. Given the importance of steel pipe quality to engineering safety and reliability, it is necessary to test the water pressure resistance of steel pipes after production.

[0003] However, during use, the existing water pressure testing equipment used for steel pipe compression testing mostly uses rubber gaskets to press and seal the two ends of the steel pipe. This single-layer sealing method often has an unsatisfactory sealing effect, which will affect the accuracy of the test results. In addition, the existing water pressure testing equipment generally fixes the steel pipe through the pressure of the rubber gaskets at both ends of the steel pipe. This fixing method is relatively simple and has a poor fixing effect, which will also affect the accuracy of the test. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A hydraulic pressure testing device for steel pipe compression testing, mainly comprising: A support assembly, the support assembly comprising a base and a pair of support frames fixedly connected to the top of the base; A moving component, the moving component is arranged above the base and fixedly connected to the base; A fixed sealing component is connected to the movable component and is used to fix the steel pipe and can seal both ends of the steel pipe.

[0006] As a preferred solution of the water pressure testing equipment for steel pipe compression testing described in the present invention, the movable assembly includes a pair of side plates fixedly connected to the top of the left and right sides of the base, positive and negative screw rods rotatably connected to the pair of side plates, a guide slide rod fixedly connected to the pair of side plates, a pair of movable plates threadedly connected to the positive and negative screw rods, and a driving motor fixedly connected to one of the side plates, the output end of the driving motor is fixedly connected to one end of the positive and negative screw rods, the guide slide rod slides through a pair of movable plates, a pair of the movable plates are symmetrically arranged on the positive and negative screw rods, and rubber washers are fixedly connected to the opposite sides of a pair of movable assemblies, and the rubber washers are used to seal the two ends of the steel pipe to be tested.

[0007] As a preferred solution of the water pressure testing equipment for steel pipe compression testing described in the present invention, wherein: a pair of the support frames are located between a pair of movable plates, the bottom ends of the pair of the support frames are each provided with an avoidance groove, the guide slide rods and the forward and reverse screw rods are each slidably passed through the avoidance groove, the tops of the pair of the support frames are each opened and closed with a semicircular groove, and the semicircular groove matches the steel pipe to be tested.

[0008] As a preferred solution of the water pressure testing equipment for steel pipe compression testing described in the present invention, the fixed sealing assembly is provided with a pair and is respectively fixedly connected to a pair of movable plates, and the fixed sealing assembly includes a sealing mechanism fixedly connected to the movable plate and a fixing mechanism fixedly connected to the sealing mechanism.

[0009] As a preferred solution of the water pressure testing equipment for steel pipe compression testing described in the present invention, the sealing mechanism includes a fixed tube fixedly passing through the movable plate, a cross bar slidingly passing through the fixed tube, a vertical rod fixedly connected to one end of the cross bar away from the support frame, a limiting slide slidably connected to the bottom of the vertical rod, a support rod fixedly connected to the other end of the cross bar, a push block fixedly connected to one end of the support rod away from the cross bar, a sealing member arranged on the side of the fixed tube facing the support frame and fixedly sleeved on the outside of the cross bar, and a pressure plate arranged on the side of the movable plate where the support frame is arranged and fixedly sleeved on the outside of the fixed tube, a limiting member is arranged on the top of the cross bar at the side of the movable plate away from the support frame and close to the pipe mouth of the fixed tube, the top of the limiting member is engaged with the top of the fixed tube, the bottom of the limiting slide slidably connected to the top of the side plate, the fixing mechanism is connected to the fixed tube and the sealing member, a pair of first inclined surfaces are symmetrically arranged on the side of the push block facing the support rod, and water inlet holes connected to each other are arranged in the cross bar, the support rod and the push block in one of the fixed sealing components, and the water inlet hole is connected to the water pressure testing system.

[0010] As a preferred solution of the water pressure testing equipment for steel pipe compression testing described in the present invention, wherein: a groove is provided on the top of the cross bar, and a locking groove connected up and down is provided at the top of the fixed tube corresponding to the groove, and the limiting member includes a first spring fixedly connected to the inner bottom wall of the groove and a clamping block fixedly connected to the top of the first spring, the top of the clamping block movably passes through the groove and is adapted to be clamped with the clamping groove, and the top of the clamping block is an arc surface. When the vertical rod contacts the inner wall of one end of the steel pipe with the limiting slide groove, if the fixed tube continues to move toward the direction of the steel pipe, the clamping block is forced to squeeze the first spring downward and fall out of the clamping groove.

[0011] As a preferred solution of the water pressure testing equipment for steel pipe compression resistance testing described in the present invention, wherein: the sealing member includes a fixed plate fixedly sleeved on the outside of the cross bar, an airbag ring fixedly sleeved on the peripheral side of the fixed plate, and airbag balls fixed on one side of the fixed plate in an annular array, the airbag balls are arranged toward the pressure plate, and the peripheral side of the fixed plate has L-shaped air vents in an annular array, the number of the L-shaped air vents is consistent with that of the airbag balls, and they correspond one to one, and one end of the L-shaped air vent is connected to the airbag ring, and the other end is connected to the airbag ball, when the pressure plate squeezes the airbag ball, gas can be added to the airbag ring, so that the airbag ring can be in close contact with the inner wall of the steel pipe to improve the sealing of the airbag ring, and the left and right sides of the fixed plate are provided with mutually connected through grooves, and the through grooves are provided with a pair, and the inner walls of the through grooves are fixedly connected with sealing rings.

[0012] As a preferred solution of the water pressure testing equipment for steel pipe compression testing described in the present invention, the fixing mechanism is provided with a pair and is symmetrically arranged on the upper and lower sides of the push block, the fixing mechanism includes a connecting plate fixedly connected to the fixing pipe, the connecting plate slides through the sealing ring, the connecting plate is fixedly connected to a telescopic piece on the side away from the pressure plate, the telescopic piece is fixedly connected to a fixing block at one end away from the connecting plate, a push rod is vertically slidably penetrated on the fixing block, a second inclined surface is arranged on one end of the push rod facing the push block, the second inclined surface is movably fitted with the first inclined surface, and the end of the push rod away from the push block is fixed A pressure block is connected, and the side of the pressure block away from the push rod is an arc surface, and a receiving groove is provided on the side of the pressure block away from the push rod. An air filling bag is fixedly connected in the receiving groove, and the air filling bag protrudes from the arc surface of the pressure block. A second spring is fixedly connected between the pressure block and the fixed block, and the second spring is movably sleeved on the outside of the push rod. A hose is provided on the side of the pressure block, one end of the hose is inserted into the receiving groove and fixedly connected with the air filling bag, and the other end is fixedly connected with the air bag ring. When the pressure block presses against the inner wall of the steel pipe, the gas in the air filling bag rushes into the air bag ring through the hose to improve the sealing of the air bag ring.

[0013] The cam is an angularly-shaped member formed in the shape of a circle, the cam being arranged on a track with the movement of the linking rod to move relative to the stopper, and the cam being arranged on a track with the movement of the linking rod to move relative to the stopper.

[0014] The test method using the above water pressure test equipment for steel pipe compression testing includes the following steps: Step 1: First, place the steel pipe to be tested in the semicircular groove on the top of a pair of support frames, and ensure that after placement, the distance between the two ends of the steel pipe and the moving plates on both sides is consistent; Step 2: Then, start the driving motor, the output end of the driving motor drives the positive and negative screws to rotate, a pair of movable plates move toward each other along the positive and negative screws under the guidance and limiting action of the guide slide bar, a pair of movable plates respectively drive the fixed tube to move, the fixed tube drives the cross bar to follow the movement under the action of the block, the cross bar drives the vertical bar to move inside the limiting slide groove, in addition, when the fixed tube and the cross bar move, they drive the seal, the fixing mechanism, and the pressure plate to move toward the steel pipe, so as to send the seal, the fixing mechanism, and the pressure plate into the steel pipe port; Step 3: When the vertical rod and the limiting slide groove contact the inner wall of one end of the steel pipe, the driving motor continues to drive the moving plate and the fixed pipe to move. At this time, the cross bar no longer moves with the fixed pipe under the limiting action of the vertical rod and the limiting slide groove. The clamping block moves downward by compressing the first spring under the extrusion of the fixed pipe and escapes from the clamping groove; Step 4: Then, the fixed tube drives the pressure plate, the connecting plate, the telescopic member, the fixed block and the push rod to continue to move forward. At this time, the push block no longer moves under the action of the vertical rod and the limiting slide groove, and the push rod moves along the fixed block toward the inner wall of the steel pipe under the action of the first inclined surface and the second inclined surface. The push rod drives the pressing block to move synchronously, and the second spring is compressed until the pressing block presses against the inner wall of the steel pipe, which is used to fix the steel pipe and improve the stability of the steel pipe during the testing process. In addition, when the pressing block approaches the inner wall of the steel pipe step by step, the air bag is squeezed, and the gas in the air bag is discharged into the air bag ring through the hose, so that the volume of the air bag ring increases, and the air bag ring contacts the inner wall of the steel pipe, which can seal the steel pipe. Step 5: In step 4, when the pressure block approaches the inner wall of the steel pipe step by step and abuts against the inner wall of the steel pipe, the stop rod moves with the pressure block. When the pressure block abuts against the inner wall of the steel pipe, the stop rod and the limit plate are staggered. At this time, the pressure plate is in active contact with the airbag ball, and then the driving motor continues to drive the moving plate and the fixed tube to move forward. The fixed tube drives the pressure plate and the connecting plate to continue to move forward. The pressure plate squeezes the airbag ball, and the gas in the airbag ball rushes into the airbag ring through the L-shaped vent hole, so that the volume of the airbag ring is further expanded, thereby further improving the sealing of the airbag ring to the steel pipe. In addition, through the telescopic effect of the fixed sleeve, the moving rod, the third spring, and the L-shaped connecting rod, when the pressure plate squeezes the airbag ball, the connecting plate will not drive the fixed block and the push rod to move, so that it is not easy to damage the inner wall of the steel pipe. When the rubber gasket abuts against the steel pipe port, the pressure plate stops squeezing the airbag ball, and the driving motor is turned off. Through the abutment of the rubber gasket and the port, the steel pipe can be double-sealed, and the sealing effect is good. Step 6: Then, add water to the inside of the steel pipe for testing by using the hydraulic pressure test system in conjunction with the water inlet; Step seven: After the test is completed, the driving motor drives the forward and reverse screw rods to rotate in the opposite direction to the previous direction, so that a pair of movable plates move backward, and the movable plate drives the pressure plate and the connecting plate to move backward through the fixed tube. After the pressure plate moves away from the airbag ball, the airbag ball resets under the action of its own rebound force, and the volume of the airbag ring becomes smaller. When the connecting plate moves backward along the sealing ring, the fixed sleeve drives the L-shaped connecting rod to follow the connecting plate to move backward. When the L-shaped connecting rod contacts the inner wall of the end of the movable groove away from the fixed block, the L-shaped connecting rod drives the movable rod to move together, and the movable rod drives the fixed block and the push rod to move. When the push rod moves backward, the push rod moves in the direction away from the inner wall of the steel pipe under the action of the rebound force of the second spring, and the push rod drives the pressure block away from the steel pipe to release the fixation of the steel pipe. In addition, when the pressure block is away from When the inner wall of the steel pipe is touched, the air bag is reset under the action of its own rebound force. During the reset process, the gas in the air bag ring flows back into the air bag, and the volume of the air bag ring is further reduced and separated from the inner wall of the steel pipe, making it convenient to pull one end of the fixed sealing assembly out of the steel pipe. In addition, during the retreat of the fixed pipe, when the fixed pipe contacts the block, the cross bar is driven to retreat together under the action of the block, and the cross bar drives the vertical bar to retreat. When the vertical bar contacts the inner wall of one end of the limiting slide groove away from the steel pipe, the fixed pipe continues to retreat, and then the block is pressed into the groove by force, continuing to retreat the fixed pipe. When the block corresponds to the engaging groove, the drive motor is turned off, and the block is reset under the action of the rebound force of the first spring and engages with the engaging groove, completing a test. Such a reciprocating cycle can be used to perform water pressure testing on several steel pipes.

[0015] Beneficial effects of the present invention: When the present invention is in use, the driving motor drives the forward and reverse screw rods to rotate, so that a pair of movable plates move toward each other. During the process of the movable plates moving toward each other, the pressure block can be pressed against the inner wall of the steel pipe. Through the pressure effect of the pressure block, the steel pipe can be stabilized, avoiding displacement of the steel pipe during the water pressure test, thereby not easily affecting the accuracy of the test.

[0016] In the present invention, during the process of a pair of moving blocks moving toward each other, gas is rushed into the airbag ring through the airbag, so that the volume of the airbag ring increases and contacts the inner wall of the steel pipe, which can preliminarily seal the inside of the steel pipe. Through the squeezing effect of the pressure plate on the airbag ball, gas can be rushed into the airbag ring again, thereby further increasing the volume of the airbag ring, so that the airbag ring can fit tightly with the inner wall of the steel pipe, thereby further improving the sealing effect of the airbag ring on the steel pipe, and the sealing effect is good. In addition, the steel pipe can be sealed again through the pressure effect of the rubber gasket and the steel pipe port. The double-layer sealing effect can ensure the sealing effect of the steel pipe, thereby improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 The figure is a schematic diagram of the overall structure of the water pressure testing equipment for steel pipe compression testing of the present invention.

[0018] Figure 2 The present invention is a schematic structural diagram of the water pressure testing equipment for steel pipe compression testing when sealing the steel pipe.

[0019] Figure 3 The present invention is a schematic structural diagram of a support frame of a water pressure testing device for steel pipe compression testing.

[0020] Figure 4 The present invention is a schematic diagram of the structure of the mobile assembly of the water pressure testing equipment used for steel pipe compression testing.

[0021] Figure 5 The present invention is a schematic structural diagram of a fixed sealing assembly of a water pressure testing device for steel pipe compression testing.

[0022] Figure 6 The present invention is a schematic cross-sectional structural diagram of a fixed sealing assembly of a water pressure testing device for steel pipe compression testing.

[0023] Figure 7It is a structural schematic diagram of a fixing sealing assembly when fixing a steel pipe in a water pressure testing device for steel pipe compression resistance testing of the present invention.

[0024] Figure 8 It is a structural schematic diagram of a fixed sealing component when squeezing an airbag ball in a water pressure testing device for steel pipe compression resistance testing of the present invention.

[0025] Fig. 9 for Figure 8 A is an enlarged structural diagram of FIG.

[0026] Fig.10 The present invention is a schematic structural diagram of a fixing mechanism of a water pressure testing device for steel pipe compression testing.

[0027] Fig.11 The present invention is a schematic structural diagram of a sealing member of a water pressure testing device for steel pipe compression testing.

[0028] Fig.12 The present invention is a schematic structural diagram of a limiter of a hydraulic pressure testing device for steel pipe compression testing.

[0029] Fig.13 The present invention is a schematic structural diagram of a telescopic member of a hydraulic testing device for steel pipe compression testing.

[0030] Fig.14 The present invention is a schematic cross-sectional structural diagram of a telescopic member of a water pressure testing device for steel pipe compression testing.

[0031] In the figure: 100, support assembly; 101, base; 102, support frame; 103, avoidance groove; 200, moving assembly; 201, side plate; 202, positive and negative screw rods; 203, guide slide rod; 204, moving plate; 205, drive motor; 206, rubber gasket; 300, fixed sealing assembly; 301, sealing mechanism; 301-1, fixed tube; 301-2, cross bar; 301-3, vertical bar; 301-4, limit slide groove; 301-5, support rod; 301-6, push block; 301-7, seal; 301-71, fixed plate; 301-72, airbag ring; 301-73, airbag ball; 301-74, sealing ring; 301-75, L-shaped vent; 301-8, pressure Disk; 301-9, limiter; 301-91, first spring; 301-92, clamping block; 301-10, clamping groove; 301-11, first inclined plane; 301-12, water inlet hole; 302, fixing mechanism; 302-1, connecting plate; 302-2, telescopic member; 302-21, fixing sleeve; 302-22, moving rod; 302-23, third spring; 302-24, limiter plate; 302-25, blocking rod; 302-26, L-shaped connecting rod; 302-27, moving groove; 302-3, fixing block; 302-4, push rod; 302-5, second inclined plane; 302-6, pressing block; 302-7, air bag; 302-8, second spring; 302-9, hose. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included. Example

[0036] Reference Figure 1-14 , which is the first embodiment of the present invention, provides a water pressure testing device for steel pipe compression testing, mainly comprising: Support assembly 100, such as Figure 1 and Figure 3 The support assembly 100 includes a base 101 and a pair of support frames 102 fixedly connected to the top of the base 101, the pair of support frames 102 are located between a pair of movable plates 204, and the bottom ends of the pair of support frames 102 are each provided with an avoidance groove 103, and the guide slide rod 203 and the forward and reverse screw rods 202 are both slidably passed through the avoidance groove 103. The tops of the pair of support frames 102 are each opened and closed with a semicircular groove, and the semicircular groove matches the steel pipe to be tested. The support frame 102 is provided to support the steel pipe.

[0037] Mobile assembly 200, such as Figure 1 , the moving component 200 is disposed above the base 101 and is fixedly connected to the base 101; like Figure 4 The moving assembly 200 includes a pair of side plates 201 fixedly connected to the top of the left and right sides of the base 101 by bolts, a positive and negative screw rod 202 rotatably connected to the pair of side plates 201 by bearings, a guide slide bar 203 fixedly connected to the pair of side plates 201, a pair of moving plates 204 threadedly connected to the positive and negative screw rods 202, and a driving motor 205 fixedly connected to one of the side plates 201 by bolts, the output end of the driving motor 205 is fixedly connected to one end of the positive and negative screw rods 202, the guide slide bar 203 slides through the pair of moving plates 204, and the guide slide bar 203 is provided to guide the movement of the moving plate 204 A pair of movable plates 204 are symmetrically arranged on the forward and reverse screw rods 202, and the opposite sides of a pair of movable components 200 are fixedly connected with rubber washers 206. The rubber washers 206 are arranged corresponding to the steel pipes. The rubber washers 206 are used to seal the two ends of the steel pipe to be inspected. When in use, the forward and reverse screw rods 202 are driven to rotate by the driving motor 205, and the pair of movable plates 204 move toward each other along the forward and reverse screw rods 202 under the guidance of the guide slide bar 203. The pair of movable plates 204 drive the rubber washers 206 to move toward the direction of the steel pipe, so that the rubber washers 206 can be pressed against the two ends of the steel pipe to achieve the effect of sealing the steel pipe.

[0038] The fixed seal assembly 300, such as Figure 1 The fixed sealing assembly 300 is connected to the moving assembly 200 and is used to fix the steel pipe and seal both ends of the steel pipe; A pair of fixed sealing assemblies 300 are provided and are respectively fixedly connected to a pair of movable plates 204 . The fixed sealing assembly 300 includes a sealing mechanism 301 fixedly connected to the movable plates 204 and a fixing mechanism 302 fixedly connected to the sealing mechanism 301 .

[0039] Specifically, Figure 5-6 The sealing mechanism 301 includes a fixed tube 301-1 fixedly penetrating the movable plate 204, a cross bar 301-2 slidably penetrating the fixed tube 301-1, a vertical rod 301-3 fixedly connected to one end of the cross bar 301-2 away from the support frame 102, a limiting slide groove 301-4 slidably connected to the bottom of the vertical rod 301-3, a support rod 301-5 fixedly connected to the other end of the cross bar 301-2, a push block 301-6 fixedly connected to one end of the support rod 301-5 away from the cross bar 301-2, and a fixed sleeve 301-6 disposed on the side of the fixed tube 301-1 facing the support frame 102. A sealing member 301-7 connected to the outside of the cross bar 301-2 and a pressure plate 301-8 arranged on the side of the movable plate 204 where the support frame 102 is arranged and fixedly sleeved on the outside of the fixed tube 301-1, a limiting member 301-9 is arranged on the top of the cross bar 301-2 at the side of the movable plate 204 away from the support frame 102 and close to the tube opening of the fixed tube 301-1, and the top of the limiting member 301-9 is engaged with the top of the fixed tube 301-1. Through the engagement of the limiting member 301-9 and the fixed tube 301-1, the cross bar 301-2 can move following the fixed tube 301-1; like Figure 7 The bottom of the limiting slide 301-4 is fixedly connected to the top of the side plate 201. When the vertical rod 301-3 moves from one end of the limiting slide 301-4 to the other end, if the fixed tube 301-1 continues to move, the limiting member 301-9 will be separated from the fixed tube 301-1, so that the fixed tube 301-1 can move alone. The fixing mechanism 302 is connected to the fixed tube 301-1 and the sealing member 301-7. The push block 301-6 is symmetrically provided with a pair of The first inclined surface 301-11, a cross bar 301-2, a support rod 301-5 and a push block 301-6 in one of the fixed sealing assemblies 300 are provided with a water inlet hole 301-12 which is interconnected. The water inlet hole 301-12 is connected to a water pressure testing system for injecting water into the steel pipe. The water pressure testing system usually includes a water inlet pipe connected to the water inlet hole 301-12, a pressure gauge connected to the water inlet pipe, a water pump, a solenoid valve and a water tank, etc., which belong to the prior art and will not be described in detail here.

[0040] Furthermore, a groove is formed on the top of the cross bar 301-2, and a snap-fitting groove 301-10 communicating with each other is formed on the top of the fixed tube 301-1 at a position corresponding to the groove. The stopper 301-9 includes a first spring 301-91 fixedly connected to the inner bottom wall of the groove and a snap-fitting block 301-92 fixedly connected to the top of the first spring 301-91. The top of the snap-fitting block 301-92 movably passes through the groove and is adapted to be snap-fitted with the snap-fitting groove 301-10 (such as Figure 6 ), the top of the block 301-92 is an arc surface. By setting the arc surface, the block 301-92 can move toward the inside of the groove under the extrusion of the fixed tube 301-1, so as to facilitate the release of the connection between the block 301-92 and the fixed tube 301-1. When the vertical rod 301-3 contacts the inner wall of one end of the limiting slide groove 301-4 toward the steel tube, if the fixed tube 301-1 continues to move toward the steel tube, the block 301-92 is forced to squeeze the first spring 301-91 downward and disengage from the engaging groove 301-10. After disengaging, the fixed tube 301-1 no longer drives the cross bar 301-2 to move.

[0041] Furthermore, Figure 6 and Fig.11 The sealing member 301-7 includes a fixed plate 301-71 fixedly sleeved on the outside of the cross bar 301-2, an airbag ring 301-72 fixedly sleeved on the side of the fixed plate 301-71, and airbag balls 301-73 fixed on one side of the fixed plate 301-71 in an annular array. The airbag balls 301-73 are arranged toward the pressure plate 301-8. The side of the fixed plate 301-71 is provided with L-shaped vents 301-75 in an annular array. The number of L-shaped vents 301-75 is the same as that of the airbag balls 301-73, and they correspond one to one. One end of the air vent 301-75 is connected to the airbag ring 301-72, and the other end is connected to the airbag ball 301-73. Therefore, when the pressure plate 301-8 squeezes the airbag ball 301-73, gas can be added to the airbag ring 301-72, so that the airbag ring 301-72 can be in close contact with the inner wall of the steel pipe to improve the sealing performance of the airbag ring 301-72 to the steel pipe. The fixed plate 301-71 has mutually connected through grooves on both sides. There is a pair of through grooves, and the inner walls of the through grooves are fixedly connected with sealing rings 301-74.

[0042] In summary, when the pipeline is sealed, the forward and reverse screw rods 202 are driven to rotate by the driving motor 205, and a pair of movable plates 204 move toward each other along the forward and reverse screw rods 202 under the guidance of the guide slide bar 203. The pair of movable plates 204 drive the rubber gasket 206 and the fixed tube 301-1 to move toward the steel tube. The fixed tube 301-1 drives the cross bar 301-2, the vertical rod 301-3, the pressure plate 301-8, the sealing member 301-7, etc. to move synchronously through the coordinated use of the clamping block 301-92, the clamping groove 301-10, the first spring 301-91, etc. When the vertical rod 301-3 contacts the inner wall of one end of the steel tube with the limiting slide groove 301-4, the fixed tube 301-1 continues to move toward the steel tube, and the clamping block 301-92 is forced to squeeze the first spring 301- 91 and disengages from the engaging groove 301-10. After disengaging, the fixed tube 301-1 no longer drives the cross bar 301-2 and the sealing member 301-7 to move, and the fixed tube 301-1 drives the pressure plate 301-8 to continue to move toward the sealing member 301-7. When the pressure plate 301-8 squeezes the airbag ball 301-73, the gas in the airbag ball 301-73 rushes into the airbag ring 301-72 through the L-shaped vent hole 301-75, so that the volume of the airbag ring 301-72 increases and is tightly pressed against the inner wall of the steel pipe, thereby sealing the steel pipe. In addition, when the movable plate 204 drives the fixed tube 301-1 to move, it also drives the rubber gasket 206 to move synchronously, and causes the rubber gasket 206 to press against both ends of the steel pipe, thereby performing double-layer sealing on the steel pipe, and the sealing effect is good.

[0043] Specifically, Figure 7 and Fig.10The fixing mechanism 302 is provided with a pair of fixing mechanisms 302, which are symmetrically arranged on the upper and lower sides of the push block 301-6. The fixing mechanism 302 includes a connecting plate 302-1 fixedly connected to the fixing tube 301-1. The connecting plate 302-1 slides through the sealing ring 301-74. The sealing ring 301-74 is provided to improve the sealing between the through groove and the connecting plate 302-1. The side of the connecting plate 302-1 away from the pressure plate 301-8 is fixedly connected to the telescopic member 302-2. The end of the telescopic member 302-2 away from the connecting plate 302-1 is fixedly connected to the fixing block 3 02-3, a push rod 302-4 is vertically slidably penetrated on the fixed block 302-3, and a second inclined surface 302-5 is arranged on one end of the push rod 302-4 facing the push block 301-6, and the second inclined surface 302-5 is movably fitted with the first inclined surface 301-11. When the push rod 302-4 is pushed, it can move upward along the first inclined surface 301-11 through the cooperation of the second inclined surface 302-5 and the first inclined surface 301-11, so that the push rod 302-4 can move toward the inner wall of the steel pipe, and the push rod 302-4 is away from the push block 301-6. The end is fixedly connected with a pressure block 302-6, and the side of the pressure block 302-6 away from the push rod 302-4 is an arc surface. By setting the arc surface, the pressure block 302-6 can fit with the inner wall of the steel pipe, so as to better fix the steel pipe. The side of the pressure block 302-6 away from the push rod 302-4 is provided with a receiving groove, and an air filling bag 302-7 is fixedly connected in the receiving groove. The air filling bag 302-7 protrudes from the arc surface of the pressure block 302-6. A second spring 302-8 is fixedly connected between the pressure block 302-6 and the fixed block 302-3. The second spring The spring 302-8 is movably sleeved on the outside of the push rod 302-4, and a hose 302-9 is provided on the side of the pressure block 302-6. One end of the hose 302-9 is inserted into the accommodating groove and fixedly connected with the air bag 302-7, and the other end is fixedly connected with the air bag ring 301-72. When the pressure block 302-6 is pressed against the inner wall of the steel pipe, the air bag 302-7 will be subjected to extrusion force, and the gas in the air bag 302-7 will rush into the air bag ring 301-72 through the hose 302-9, thereby further improving the sealing performance of the air bag ring 301-72 to the steel pipe.

[0044] Furthermore, Fig. 9 , Fig.13 and Fig.14The telescopic member 302-2 includes a fixed sleeve 302-21 fixedly connected to the connecting plate 302-1 and a moving rod 302-22 fixedly connected to the fixed block 302-3. One end of the moving rod 302-22 away from the fixed block 302-3 is adapted to slide with the inside of the fixed sleeve 302-21 and is fixedly connected with a third spring 302-23. The third spring 302-23 is fixedly connected to the inner bottom wall of the fixed sleeve 302-21. The top of the fixed sleeve 302-21 is fixedly connected to a limiting plate 302-24, and the limiting plate 302-24 faces the fixed A stopper 302-25 is movably fitted on one side of the block 302-3, and the stopper 302-25 is an inverted L-shaped structure, and one end of the top of the stopper 302-25 is fixedly connected to one side of the pressing block 302-6, wherein the stopper 302-25 plays a limiting role, so that when the push rod 302-4 is pushed to move, the fixed sleeve 302-21 will not move by squeezing the third spring 302-23, so that the push rod 302-4 can be pushed to move more quickly and stably, and the front side of the fixed sleeve 302-21 is fixedly connected with an L-shaped connecting rod 302-26, a moving groove 302-27 is provided on the front side of the moving rod 302-22, one end of the L-shaped connecting rod 302-26 is slidably connected with the inside of the moving groove 302-27, and in the initial state (i.e., when the pressing block 302-6, the push rod 302-4, etc. have not started to move toward the inner wall of the steel pipe), the L-shaped connecting rod 302-26 contacts the inner wall of the moving groove 302-27 away from the fixed block 302-3. The purpose of this arrangement is that when the fixed sleeve 302-21 drives the L-shaped connecting rod 302-26 to move and reset, The abutment between the L-shaped connecting rod 302-26 and the inner wall of the movable groove 302-27 can pull the movable rod 302-22 back and reset. The movable rod 302-22 drives the pressure block 302-6 and the push rod 302-4 to reset through the fixed block 302-3, which facilitates the release of the fixing effect of the steel pipe. When the pressure block 302-6 abuts against the inner wall of the steel pipe, the baffle rod 302-25 and the limit plate 302-24 are just offset. When the pressure block 302-6 is reset, the baffle rod 302-25 will follow the reset and fit with the limit plate 302-24.

[0045] The testing method using the above-mentioned water pressure testing equipment for steel pipe compression testing is as follows: first, place the steel pipe to be tested in a semicircular groove on the top of a pair of support frames 102, and ensure that after placement, the distances between the two ends of the steel pipe and the movable plates 204 on both sides are consistent. Then, the drive motor 205 is started, and the output end of the drive motor 205 drives the forward and reverse screw rods 202 to rotate. Under the guidance and limiting action of the guide slide bar 203, a pair of movable plates 204 move toward each other along the forward and reverse screw rods 202. The pair of movable plates 204 respectively drive the fixed tube 301-1 to move. Under the action of the block 301-92, the fixed tube 301-1 drives the cross bar 301-2 to follow the movement. The cross bar 301-2 drives the vertical rod 301-3 to move inside the limiting slide groove 301-4. In addition, when the fixed tube 301-1 and the cross bar 301-2 move, they drive the seal 301-7, the fixing mechanism 302, and the pressure plate 301-8 to move toward the direction of the steel pipe, so as to send the seal 301-7, the fixing mechanism 302, and the pressure plate 301-8 into the steel pipe port. When the vertical rod 301-3 and the limiting slide groove 301-4 contact the inner wall of one end of the steel pipe, the movable plate 204 and the fixed pipe 301-1 continue to be driven to move by the driving motor 205. At this time, the cross bar 301-2 no longer follows the fixed pipe 301-1 under the limiting action of the vertical rod 301-3 and the limiting slide groove 301-4. The clamping block 301-92 moves downward by compressing the first spring 301-91 under the extrusion of the fixed pipe 301-1 and disengages from the locking groove 301-10. Then, the fixed pipe 301-1 drives the pressure plate 301-8, the connecting plate 302-1, the telescopic member 302-2, the fixed block 302-3, and the push rod 302-4 to continue to move forward. At this time, the push block 301-6 stops moving under the action of the vertical rod 301-3 and the limiting slide groove 301-4, and the push rod 302-4 moves along the fixed block 302-3 toward the inner wall of the steel pipe under the action of the first inclined surface 301-11 and the second inclined surface 302-5. The push rod 302-4 drives the pressure block 302-6 to move simultaneously. As the pressure block 302-6 moves step by step, the second spring 302-8 is compressed until the pressure block 302-6 presses against the inner wall of the steel pipe, which is used to fix the steel pipe and improve the stability of the steel pipe during testing. In addition, when the pressure block 302-6 approaches the inner wall of the steel pipe step by step, the air bag 302-7 is squeezed, and the gas in the air bag 302-7 is discharged into the air bag ring 301-72 through the hose 302-9, so that the volume of the air bag ring 301-72 increases, and the air bag ring 301-72 contacts the inner wall of the steel pipe, which can seal the steel pipe.When the pressure block 302-6 approaches the inner wall of the steel pipe step by step and abuts against the inner wall of the steel pipe, the blocking rod 302-25 moves with the pressure block 302-6. When the pressure block 302-6 abuts against the inner wall of the steel pipe, the blocking rod 302-25 and the limiting plate 302-24 are staggered. At this time, the pressure plate 301-8 is in active contact with the airbag ball 301-73, and then continues to drive the moving plate 204 and the fixed tube 301-1 to move forward through the driving motor 205. The fixed tube 301-1 drives the pressure plate 301-8 and the connecting plate 302-1 to continue to move forward. The pressure plate 301-8 squeezes the airbag ball 301-73, and the gas in the airbag ball 301-73 rushes into the airbag ring 301-72 through the L-shaped vent hole 301-75, so that the airbag The volume of the ring 301-72 is further enlarged, thereby further improving the sealing performance of the airbag ring 301-72 on the steel pipe. In addition, through the telescopic effect of the fixed sleeve 302-21, the movable rod 302-22, the third spring 302-23, and the L-shaped connecting rod 302-26, when the pressure plate 301-8 squeezes the airbag ball 301-73, the connecting plate 302-1 will not drive the fixed block 302-3 and the push rod 302-4 to move, and thus it is not easy to damage the inner wall of the steel pipe. When the rubber gasket 206 abuts against the port of the steel pipe, the pressure plate 301-8 stops squeezing the airbag ball 301-73, and the driving motor 205 is turned off. Through the abutment of the rubber gasket 206 and the port, the steel pipe can be double-sealed, and the sealing effect is good.Then, by using the water pressure test system in conjunction with the water inlet 301-12, water is added to the inside of the steel pipe for testing. After the test is completed, the driving motor 205 drives the positive and negative screw rods 202 to rotate in the opposite direction to the previous direction, so that a pair of movable plates 204 move backward, and the movable plate 204 drives the pressure plate 301-8 and the connecting plate 302-1 to move backward through the fixed tube 301-1. After the pressure plate 301-8 moves away from the airbag ball 301-73, the airbag ball 301-73 is reset under the action of its own rebound force, the volume of the airbag ring 301-72 becomes smaller, and the connecting plate 302-1 moves along the sealing ring 301-7 When the push rod 302-4 moves backward, the fixed sleeve 302-21 drives the L-shaped connecting rod 302-26 to follow the connecting plate 302-1 to move backward. When the L-shaped connecting rod 302-26 contacts the inner wall of the end of the moving groove 302-27 away from the fixed block 302-3, the L-shaped connecting rod 302-26 drives the moving rod 302-22 to move together. The moving rod 302-22 drives the fixed block 302-3 and the push rod 302-4 to move. When the push rod 302-4 moves backward, the push rod 302-4 moves in the direction away from the inner wall of the steel pipe under the action of the rebound force of the second spring 302-8, and the push rod 302-4 drives the pressing block 302-6 is away from the steel pipe, releasing the fixation of the steel pipe. In addition, when the pressing block 302-6 is away from the inner wall of the steel pipe, the air bag 302-7 is reset under the action of its own resilience. During the reset process, the gas in the air bag ring 301-72 flows back into the air bag 302-7, and the volume of the air bag ring 301-72 is further reduced and separated from the inner wall of the steel pipe, so that one end of the fixed sealing assembly 300 is conveniently withdrawn from the steel pipe. In addition, during the retreat of the fixed pipe 301-1, when the fixed pipe 301-1 contacts the clamping block 301-92, the cross bar 301-2 is driven by the clamping block 301-92. They move backward together, and the horizontal bar 301-2 drives the vertical bar 301-3 to move backward. When the vertical bar 301-3 contacts the inner wall of one end of the limiting slide groove 301-4 away from the steel pipe, the fixed pipe 301-1 continues to move backward, and then the clamping block 301-92 is pressed into the groove by force, and the fixed pipe 301-1 continues to move backward. When the clamping block 301-92 corresponds to the engaging groove 301-10, the driving motor 205 is turned off, and the clamping block 301-92 is reset under the action of the rebound force of the first spring 301-91 and engages with the engaging groove 301-10, completing a test. Such a reciprocating cycle can be used to perform water pressure tests on several steel pipes.

[0046] It is worth noting that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A hydraulic pressure testing device for steel pipe compression testing, characterized in that: include: A support assembly (100), the support assembly (100) comprising a base (101) and a pair of support frames (102) fixedly connected to the top of the base (101); A moving component (200), the moving component (200) being arranged above the base (101) and fixedly connected to the base (101); A fixed sealing assembly (300), the fixed sealing assembly (300) being connected to the movable assembly (200) and being used to fix the steel pipe and capable of sealing both ends of the steel pipe; A pair of fixed sealing assemblies (300) are provided and are respectively fixedly connected to a pair of movable plates (204), wherein the fixed sealing assembly (300) comprises a sealing mechanism (301) fixedly connected to the movable plates (204) and a fixing mechanism (302) fixedly connected to the sealing mechanism (301); The sealing mechanism (301) comprises a fixed tube (301-1) fixedly penetrating the movable plate (204), a cross bar (301-2) slidably penetrating the fixed tube (301-1), a vertical bar (301-3) fixedly connected to one end of the cross bar (301-2) away from the support frame (102), a limiting sliding groove (301-4) slidably connected to the bottom of the vertical bar (301-3), and a support frame (301-4) fixedly connected to the other end of the cross bar (301-2). A rod (301-5), a push block (301-6) fixedly connected to one end of the support rod (301-5) away from the cross bar (301-2), a sealing member (301-7) arranged on a side of the fixed tube (301-1) facing the support frame (102) and fixedly sleeved on the outside of the cross bar (301-2), and a pressure plate (301-7) arranged on a side of the movable plate (204) where the support frame (102) is arranged and fixedly sleeved on the outside of the fixed tube (301-1). -8), a limiting member (301-9) is provided on the top of the cross bar (301-2) at a side of the movable plate (204) away from the support frame (102) and close to the pipe opening of the fixed pipe (301-1), the top of the limiting member (301-9) is snap-connected with the top of the fixed pipe (301-1), the bottom of the limiting slide groove (301-4) is fixedly connected with the top of the side plate (201), and the fixing mechanism (302) is connected to the fixed pipe (301-1). , a sealing member (301-7) is connected, a pair of first inclined surfaces (301-11) are symmetrically arranged on one side of the push block (301-6) facing the support rod (301-5), wherein a cross bar (301-2), the support rod (301-5) and the push block (301-6) in one fixed sealing assembly (300) are provided with water inlet holes (301-12) that are interconnected, and the water inlet hole (301-12) is connected to a water pressure test system; The sealing member (301-7) comprises a fixed plate (301-71) fixedly sleeved on the outside of the crossbar (301-2), an airbag ring (301-72) fixedly sleeved on the peripheral side of the fixed plate (301-71), and airbag balls (301-73) fixed in an annular array on one side of the fixed plate (301-71), wherein the airbag balls (301-73) are arranged toward the pressure plate (301-8), and the peripheral side of the fixed plate (301-71) has L-shaped vent holes (301-75) in an annular array, and the number of the L-shaped vent holes (301-75) is the same as that of the airbag balls (301-73), and the number of the L-shaped vent holes (301-75) is the same as that of the airbag balls (301-73), and the number of the L-shaped vent holes (301-75) is the same as that of the airbag balls (301-73). Correspondingly, one end of the L-shaped vent hole (301-75) is communicated with the airbag ring (301-72), and the other end is communicated with the airbag ball (301-73). When the pressure plate (301-8) squeezes the airbag ball (301-73), gas can be added to the airbag ring (301-72), so that the airbag ring (301-72) can be in close contact with the inner wall of the steel pipe, so as to improve the sealing performance of the airbag ring (301-72). The left and right sides of the fixed plate (301-71) are provided with mutually communicated through grooves, and the through grooves are provided with a pair, and the inner walls of the through grooves are fixedly connected with sealing rings (301-74); The fixing mechanism (302) is provided with a pair of symmetrically arranged on the upper and lower sides of the push block (301-6), the fixing mechanism (302) comprising a connecting plate (302-1) fixedly connected to the fixing tube (301-1), the connecting plate (302-1) slidingly penetrating the sealing ring (301-74), the connecting plate (302-1) being fixedly connected to a telescopic member (302-2) on a side away from the pressure plate (301-8), the telescopic member (302-2) being away from the connecting plate (302-1) ) is fixedly connected to a fixed block (302-3) at one end, a push rod (302-4) is vertically slidably penetrated through the fixed block (302-3), a second inclined surface (302-5) is arranged at one end of the push rod (302-4) facing the push block (301-6), the second inclined surface (302-5) is movably fitted with the first inclined surface (301-11), and a pressure block (302-6) is fixedly connected to one end of the push rod (302-4) away from the push block (301-6), the pressure block (302 -6) has a curved surface on one side away from the push rod (302-4), and a receiving groove is provided on the side of the pressing block (302-6) away from the push rod (302-4), and an air replenishing bag (302-7) is fixedly connected in the receiving groove, and the air replenishing bag (302-7) protrudes from the curved surface of the pressing block (302-6), and a second spring (302-8) is fixedly connected between the pressing block (302-6) and the fixed block (302-3), and the second spring (302-8) is movably sleeved on the push rod (3 02-4), a hose (302-9) is arranged on the side of the pressing block (302-6), one end of the hose (302-9) is inserted into the receiving groove and fixedly connected with the air bag (302-7), and the other end is fixedly connected with the air bag ring (301-72). When the pressing block (302-6) is pressed against the inner wall of the steel pipe, the gas in the air bag (302-7) rushes into the air bag ring (301-72) through the hose (302-9), so as to improve the sealing performance of the air bag ring (301-72).

2. The hydraulic pressure testing equipment for steel pipe compression testing according to claim 1, characterized in that: The moving assembly (200) comprises a pair of side plates (201) fixedly connected to the top of the left and right sides of the base (101), a forward and reverse screw rod (202) rotatably connected to the pair of side plates (201), a guide slide rod (203) fixedly connected to the pair of side plates (201), a pair of moving plates (204) threadedly connected to the forward and reverse screw rods (202), and a driving motor (205) fixedly connected to one of the side plates (201), wherein the output end of the driving motor (205) is fixedly connected to one end of the forward and reverse screw rods (202), the guide slide rod (203) slides through the pair of moving plates (204), the pair of moving plates (204) are symmetrically arranged on the forward and reverse screw rods (202), and rubber washers (206) are fixedly connected to opposite sides of the pair of moving assemblies (200), and the rubber washers (206) are used to seal the two ends of the steel pipe to be inspected.

3. The hydraulic pressure testing equipment for steel pipe compression testing according to claim 1, characterized in that: The pair of support frames (102) are located between a pair of movable plates (204); the bottom ends of the pair of support frames (102) are each provided with an avoidance groove (103); the guide slide rod (203) and the forward and reverse screw rods (202) are each slidably inserted through the avoidance groove (103); the tops of the pair of support frames (102) are each provided with a semicircular groove, and the semicircular groove matches the steel pipe to be inspected.

4. The hydraulic pressure testing equipment for steel pipe compression testing according to claim 1, characterized in that: A groove is provided at the top of the cross bar (301-2); a snap-fit ​​groove (301-10) communicating with each other from top to bottom is provided at the top of the fixed tube (301-1) at a position corresponding to the groove; the limiting member (301-9) comprises a first spring (301-91) fixedly connected to the inner bottom wall of the groove and a snap-fit ​​block (301-92) fixedly connected to the top of the first spring (301-91); the top of the snap-fit ​​block (301-92) movably passes through the groove and is adapted to snap-fit ​​with the snap-fit ​​groove (301-10); the top of the snap-fit ​​block (301-92) is an arc surface; when the vertical bar (301-3) contacts the inner wall of one end of the steel tube with the limiting sliding groove (301-4), if the fixed tube (301-1) continues to move toward the steel tube, the snap-fit ​​block (301-92) is forced to press the first spring (301-91) downward and escape from the snap-fit ​​groove (301-10).

5. The hydraulic pressure testing equipment for steel pipe compression testing according to claim 1, characterized in that: The telescopic member (302-2) comprises a fixed sleeve (302-21) fixedly connected to the connecting plate (302-1) and a moving rod (302-22) fixedly connected to the fixing block (302-3); one end of the moving rod (302-22) away from the fixing block (302-3) is adapted to slide with the inside of the fixing sleeve (302-21) and is fixedly connected to a third spring (302-23); the third spring (302-23) is fixedly connected to the inner bottom wall of the fixing sleeve (302-21); a limiting plate (302-24) is fixedly connected to the top of the fixing sleeve (302-21); a stopper (302-25) is movably fitted on one side of the limiting plate (302-24) facing the fixing block (302-3); the stopper The rod (302-25) is in an inverted L-shaped structure, and one end of the top of the blocking rod (302-25) is fixedly connected to one side of the pressing block (302-6); the front side of the fixed sleeve (302-21) is fixedly connected to an L-shaped connecting rod (302-26); the front side of the movable rod (302-22) is provided with a movable groove (302-27); one end of the L-shaped connecting rod (302-26) is slidably connected to the inside of the movable groove (302-27); and in an initial state, the L-shaped connecting rod (302-26) contacts the inner wall of the movable groove (302-27) away from the fixed block (302-3); when the pressing block (302-6) contacts the inner wall of the steel pipe, the blocking rod (302-25) and the limiting plate (302-24) are staggered.

6. The testing method of the water pressure testing equipment for steel pipe compression testing according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: First, place the steel pipe to be tested in the semicircular groove on the top of a pair of support frames (102), and ensure that after placement, the distances between the two ends of the steel pipe and the movable plates (204) on both sides are consistent; Step 2: Then, the drive motor (205) is started, and the output end of the drive motor (205) drives the forward and reverse screw rods (202) to rotate. Under the guidance and limiting action of the guide slide bar (203), the pair of movable plates (204) move toward each other along the forward and reverse screw rods (202). The pair of movable plates (204) respectively drive the fixed tube (301-1) to move. Under the action of the clamping block (301-92), the fixed tube (301-1) drives the cross bar (301- 2) Following the movement, the horizontal bar (301-2) drives the vertical bar (301-3) to move inside the limiting slide groove (301-4); in addition, when the fixed tube (301-1) and the horizontal bar (301-2) move, they drive the sealing member (301-7), the fixing mechanism (302), and the pressure plate (301-8) to move toward the steel pipe, so as to send the sealing member (301-7), the fixing mechanism (302), and the pressure plate (301-8) into the port of the steel pipe; Step 3: When the vertical rod (301-3) and the limiting slide groove (301-4) contact the inner wall of one end of the steel pipe, the driving motor (205) continues to drive the movable plate (204) and the fixed pipe (301-1) to move. At this time, the cross bar (301-2) no longer moves with the fixed pipe (301-1) under the limiting action of the vertical rod (301-3) and the limiting slide groove (301-4), and the clamping block (301-92) moves downward by compressing the first spring (301-91) under the pressure of the fixed pipe (301-1) and escapes from the clamping groove (301-10); Step 4: Then, the fixed tube (301-1) drives the pressure plate (301-8), the connecting plate (302-1), the telescopic member (302-2), the fixed block (302-3), and the push rod (302-4) to continue to move forward. At this time, the push block (301-6) no longer moves under the action of the vertical rod (301-3) and the limiting slide groove (301-4), while the push rod (302-4) moves along the fixed block (302-3) toward the inner wall of the steel pipe under the action of the first inclined surface (301-11) and the second inclined surface (302-5). The push rod (302-4) drives the pressure block (302-6) moves synchronously, and the second spring (302-8) is compressed until the pressing block (302-6) presses against the inner wall of the steel pipe, which is used to fix the steel pipe and improve the stability of the steel pipe during testing. In addition, when the pressing block (302-6) approaches the inner wall of the steel pipe step by step, the air bag (302-7) is squeezed, and the gas in the air bag (302-7) is discharged into the air bag ring (301-72) through the hose (302-9), so that the volume of the air bag ring (301-72) increases, and the air bag ring (301-72) contacts the inner wall of the steel pipe, so that the steel pipe can be sealed; Step 5: In step 4, when the pressing block (302-6) gradually approaches the inner wall of the steel tube and contacts the inner wall of the steel tube, the stop rod (302-25) moves along with the pressing block (302-6). When the pressing block (302-6) contacts the inner wall of the steel tube, the stop rod (302-25) and the limit plate (302-24) are staggered. At this time, the pressure plate (301-8) and the airbag ball (301-73) are in active contact. Then, the driving motor (205) drives the movable plate (204) and the fixed tube (301-1) to move forward, the fixed tube (301-1) drives the pressure plate (301-8) and the connecting plate (302-1) to continue to move forward, the pressure plate (301-8) squeezes the airbag ball (301-73), and the gas in the airbag ball (301-73) rushes into the airbag ring (301-73) through the L-shaped vent hole (301-75). 72), so that the volume of the airbag ring (301-72) is further enlarged, thereby further improving the sealing performance of the airbag ring (301-72) on the steel pipe. In addition, through the telescopic effect of the fixing sleeve (302-21), the moving rod (302-22), the third spring (302-23), and the L-shaped connecting rod (302-26), when the pressure plate (301-8) squeezes the airbag ball (301-73), the connecting plate (302-1) will not drive the fixing block (302-3) and the push rod (302-4) to move, thereby not easily damaging the inner wall of the steel pipe. When the rubber gasket (206) abuts against the port of the steel pipe, the pressure plate (301-8) stops squeezing the airbag ball (301-73), and the driving motor (205) is turned off. Through the abutment effect of the rubber gasket (206) and the port, the steel pipe can be double-sealed, and the sealing effect is good. Step 6: Then, by using the hydraulic pressure test system in conjunction with the water inlet (301-12), water is added to the inside of the steel pipe for testing; Step 7: After the test is completed, the driving motor (205) drives the forward and reverse screw rods (202) to rotate in the opposite direction to the previous direction, so that the pair of movable plates (204) move backward, and the movable plate (204) drives the pressure plate (301-8) and the connecting plate (302-1) to move backward through the fixed tube (301-1). After the pressure plate (301-8) moves away from the airbag ball (301-73), the airbag ball (301-73) returns to its original position under the action of its own rebound force, and the volume of the airbag ring (301-72) decreases. When the connecting plate (302-1) moves backward along the sealing ring (301-74), the fixed sleeve (302-21) drives the L-shaped connecting rod (302-1) to move backward. 02-26) moves backward with the connecting plate (302-1), and when the L-shaped connecting rod (302-26) contacts the inner wall of one end of the moving groove (302-27) away from the fixed block (302-3), the L-shaped connecting rod (302-26) drives the moving rod (302-22) to move together, and the moving rod (302-22) drives the fixed block (302-3) and the push rod (302-4) to move. When the push rod (302-4) moves backward, the push rod (302-4) moves in a direction away from the inner wall of the steel pipe under the action of the rebound force of the second spring (302-8), and the push rod (302-4) drives the pressing block (302-6) away from the steel pipe, thereby releasing the pressure. The steel pipe is fixed. In addition, when the pressing block (302-6) is away from the inner wall of the steel pipe, the air bag (302-7) is reset under the action of its own resilience. During the reset process, the gas in the air bag ring (301-72) flows back into the air bag (302-7), and the volume of the air bag ring (301-72) is further reduced and separated from the inner wall of the steel pipe, so that one end of the fixed sealing component (300) can be easily drawn out from the steel pipe. In addition, during the retreat of the fixed pipe (301-1), when the fixed pipe (301-1) contacts the clamping block (301-92), the clamping block (301-92) drives the cross bar (301-2) to retreat together, and the cross bar ( The vertical rod (301-2) drives the vertical rod (301-3) to retreat. When the vertical rod (301-3) contacts the inner wall of one end of the limit sliding groove (301-4) away from the steel pipe, the fixed pipe (301-1) continues to retreat. Then, the clamping block (301-92) is pressed into the groove by force, and the fixed pipe (301-1) continues to retreat. When the clamping block (301-92) corresponds to the engaging groove (301-10), the driving motor (205) is turned off. The clamping block (301-92) is reset under the action of the rebound force of the first spring (301-91) and engages with the engaging groove (301-10), completing one test. This reciprocating cycle can be used to perform water pressure tests on a plurality of steel pipes.

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