Experimental device for multiple working conditions of composite pipe

Abstract

According to the multi-working-condition experimental device for the composite pipe, an L-shaped baffle is fixed to the left end of a supporting seat plate, and a rotary supporting device installed on the L-shaped baffle and a position-adjustable supporting device installed on the supporting seat plate are coaxially arranged; the outer ends of the rotary supporting device and the position-adjustable supporting device are fixedly connected with water injection pipes communicating with the interiors of the rotary supporting device and the position-adjustable supporting device in a sealed mode. The rotary supporting device is fixedly connected with the left end of the composite pipe in a sealed mode, and the position-adjustable supporting device is fixedly connected with the right end of the composite pipe in a sealed mode to test the internal pressure working condition or the torsion working condition or the stretching working condition or the torsion working condition or the stretching working condition or the bending working condition of the composite pipe. According to the invention, reliable support of the composite pipe in a state that one end rotates and the other end is fixed is realized, conditions are provided for experiments under internal pressing, stretching, bending, twisting and composite working conditions of the composite pipe, the defects of complexity, higher cost and great maintenance difficulty of a traditional experimental device are overcome, and experiments under various working conditions are completed more accurately and conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of composite pipe experimental devices, and in particular relates to a composite pipe multiple working condition experimental device. Background Art

[0002] With the improvement of oil and gas production capacity, deepwater oil and gas resources have gradually become the focus of people's attention. Since thermoplastic composite pipes are light, high-strength, excellent flexibility and corrosion resistance, they have great potential in the field of deep-sea oil and gas development and are expected to receive more extensive attention and application in the future. In order to achieve longer life and higher safety requirements during the service of composite pipes, the experimental device of composite pipes becomes particularly important. Accurate experimental data will provide a more accurate reference for the production and use of composite pipes. The production process of composite pipes is relatively complex, which also leads to the design and manufacture of experimental devices being more complex, more expensive, and more difficult to maintain. In addition, the working conditions of composite pipes are more complex. Under normal circumstances, they will be affected by multiple environments and loads at the same time, which also leads to the need for the experimental device to be able to simulate multiple working conditions at the same time. Therefore, in response to the above problems, an experimental device with a simple structure, easy maintenance and the ability to simulate multiple environmental conditions is provided, which can complete the experiment more accurately and conveniently. Summary of the invention

[0003] The technical problem solved by the present invention is as follows: a composite pipe multiple working condition experimental device is provided, by arranging a rotation support device installed on an L-shaped baffle and sealed and fixedly connected to one end of the composite pipe on a support base plate and a position-adjustable support device installed on the support base plate and sealed and fixedly connected to the other end of the composite pipe, to achieve reliable support for the composite pipe in a rotating state with one end and a fixed state with the other end, to provide conditions for experiments under internal pressure, tension, bending, torsion and composite working conditions of the composite pipe, to solve the defects of traditional experimental devices being complicated, more expensive and difficult to maintain, to be able to simulate multiple environmental working conditions, to complete experiments under various working conditions more accurately and conveniently, to have a simple structure, novel design, easy maintenance, easy assembly and repair, low cost, and easy to promote and use.

[0004] The technical solution adopted by the present invention is as follows: a composite pipe multiple working condition experimental device, comprising a base, a support seat plate is fixed on the upper end surface of the base, an L-shaped baffle is fixed on the left end of the support seat plate, and a rotating support device installed on the L-shaped baffle is coaxially arranged with a position-adjustable support device installed on the support seat plate, and the outer ends of the rotating support device and the position-adjustable support device are both sealed and fixedly connected with a water injection pipe connected to the inside thereof;

[0005] The rotating support device is sealed and fixedly connected to the left end of the composite pipe, and the position-adjustable support device is sealed and connected to the right end of the composite pipe, and pressurized water is injected into the interior of the composite pipe through the water injection pipes at both ends, or a torsional force is applied to the left end of the composite pipe through the rotating support device, or a horizontal traction force is applied to the position-adjustable support device, or a downward pressure is applied to the position-adjustable support device, so as to realize experiments on the internal pressure condition, torsional condition, tensile condition, or bending condition of the composite pipe.

[0006] Among them, the position-adjustable support device includes a slider and a right locking connection assembly, a guide rail is fixed on the upper surface of the support seat plate along its length direction, and the slider is adaptably connected to the guide rail, the right end of the composite pipe is fixedly connected to the left end of the right locking connection assembly, and the right end of the right locking connection assembly is fixedly connected to the right water injection pipe, the slider is axially positioned and connected to the right locking connection assembly, and when the slider moves along the length direction of the guide rail, the position-adjustable support device is moved and adjusted along the length direction of the support seat plate, and the slider is provided with a fixing bolt whose inner end is pressed against the guide rail.

[0007] Furthermore, the right locking connection assembly includes a locking joint, a locking nut and a right twist handle, the locking joint is a T-shaped sleeve structure, the right end of the composite pipe is fixedly connected to the small diameter section of the left end of the locking joint, and the locking nut, which is sleeved on the locking joint and positioned with the large diameter section, is threadedly connected to the left end of the right twist handle, and the right twist handle and the locking joint are tightened and sealed under the tightening connection of the locking nut; two sliders are symmetrically provided on both sides of the right end of the guide rail, which are adapted to be connected to the guide grooves on the corresponding sides, and the sliders are L-shaped stepped structure, the right twist handle is located between the two sliders, and the locking bolt threadedly connected to the upper end of the vertical edge of the slider is adapted to the positioning ring groove on the outer circumferential wall of the right twist handle, and the inner end of the locking bolt is contacted and locked with the bottom of the positioning ring groove by rotating the locking bolt, so as to realize the locking and fixing of the right end of the composite pipe.

[0008] Furthermore, a sealing ring is installed on the left end surface of the right twist handle and is in contact and sealing with the right end surface of the locking joint.

[0009] Furthermore, the rotation support device includes a locking joint, a locking nut, a connecting joint and a left twist handle. The lower end of the L-shaped baffle is formed with an avoidance groove for avoiding the guide rail, and the lower end of the L-shaped baffle adapted to the guide rail is fixed to the support seat plate, and a bearing is positioned and installed in the stepped hole on the vertical plate surface of the L-shaped baffle, and the pressure cover fixed on the left side surface of the vertical plate of the L-shaped baffle positions the bearing. The connecting joint is a multi-stage stepped sleeve structure, and the small diameter section at the left end of the connecting joint is adapted to be connected with the bearing and passes through the pressure cover and is threadedly fixed to the left twist handle. The left end of the composite pipe is fixedly connected to the small diameter section at the right end of the locking joint, and the locking nut sleeve which is mounted on the locking joint and positioned with its large diameter section is threadedly connected to the right end of the connecting joint, and the left twist handle and the locking joint are tightened and sealed under the tightening connection action of the locking nut sleeve.

[0010] Furthermore, a sealing ring is installed on the right end surface of the connecting joint and is in contact and pressed against the left end surface of the locking joint.

[0011] Furthermore, the locking joint includes a core tube and a locking sleeve, the outer contour of the core tube is a three-level stepped sleeve structure with the diameter decreasing from the outside to the inside, a positioning convex ring is formed at the outer edge of the inner hole of the locking sleeve, and the positioning convex ring is adapted to the positioning groove on the outer wall of the middle diameter section of the core tube, a plurality of tooth grooves are evenly distributed on the inner hole wall of the locking sleeve and the outer circumferential wall of the small diameter section of the core tube, and the composite tube which is sleeved on the small diameter section of the core tube and located between the ratchet teeth of the small diameter section of the core tube and the ratchet teeth on the inner hole wall of the locking sleeve is sealed and fixed to the core tube by the compression-deformed locking sleeve, thereby realizing the sealed and fixed connection between the end of the composite tube and the locking joint.

[0012] Furthermore, the small diameter section of the core tube is formed with a plurality of sealing grooves, and the sealing rings adapted to be in the sealing grooves are in contact and sealed with the inner hole wall of the composite tube end.

[0013] Furthermore, the left twist handle and the right twist handle are both conical sleeve structures with an outer end diameter larger than an inner end diameter, and the flanges at the two water injection pipe orifices are respectively fixed to the large diameter end faces of the left twist handle and the right twist handle by multiple bolts, and are connected to the center holes inside the left twist handle and the right twist handle.

[0014] Furthermore, the support seat plate is a channel steel with its opening facing downward, and the channel steel is fixed on the base.

[0015] The advantages of the present invention compared with the prior art are:

[0016] 1. This technical solution provides reliable support for the composite pipe when one end is rotating and the other end is fixed by arranging a rotation support device installed on the L-shaped baffle and sealed and fixedly connected to one end of the composite pipe on the support base plate and an adjustable position support device installed on the support base plate and sealed and fixedly connected to the other end of the composite pipe. This provides conditions for the experiments under the internal pressure, tension, bending, torsion and composite working conditions of the composite pipe, and solves the defects of the traditional experimental device being complicated, more expensive and difficult to maintain.

[0017] 2. This technical solution adopts a locking joint composed of a core tube with grooves on the outer tube wall and a locking sleeve with grooves on the inner hole wall, which provides conditions for the rapid and reliable connection between the composite tube and the locking joint, and by arranging a plurality of sealing grooves with sealing rings on the outer circumferential wall of the small diameter section of the tube core, the composite tube and the locking joint are reliably sealed, the sealing requirements of the internal pressure test are met, and the internal pressure test is completed accurately and effectively;

[0018] 3. With the cooperation of the guide rail and the slider, this technical solution provides adaptive position adjustment conditions for experiments under bending, torsion and tension conditions, ensuring the smooth and stable progress of the experimental process;

[0019] 4. This technical solution has a simple structure, novel design, easy maintenance, easy assembly and repair, low cost, and easy promotion and use. It can simulate a variety of environmental conditions and can complete experiments under various conditions more accurately and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the structure of the present invention;

[0021] Figure 2 for Figure 1 A in the middle is a partial enlarged schematic diagram;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the state of the present invention in a twisting working condition;

[0024] Figure 5 It is a schematic diagram of the state of the present invention during the stretching working condition;

[0025] Figure 6 It is a schematic diagram of the state of the present invention during bending working condition. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention Figure 1-6As shown, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0029] Composite pipe various working conditions test device, such as Figure 1-6 As shown, it includes a base 8, a support seat plate 7 is fixed to the upper end surface of the base 8, an L-shaped baffle 6 is fixed to the left end of the support seat plate 7, and a rotation support device installed on the L-shaped baffle 6 and a position-adjustable support device installed on the support seat plate 7 are coaxially arranged, and the outer ends of the rotation support device and the position-adjustable support device are both sealed and fixedly connected with a water injection pipe 1 that is connected to the inside thereof;

[0030] like Figure 3-6As shown, the rotating support device is sealed and fixedly connected to the left end of the composite pipe 9, and the position-adjustable support device is sealed and connected to the right end of the composite pipe 9, and pressurized water is injected into the composite pipe 9 through the water injection pipes 1 at both ends, or a torsional force is applied to the left end of the composite pipe 9 through the rotating support device, or a horizontal traction force is applied to the position-adjustable support device, or a downward pressure is applied to the position-adjustable support device, so as to realize the experiment of the internal pressure working condition, torsional working condition, tensile working condition or bending working condition of the composite pipe 9; in the above structure, by arranging a rotating support device installed on the L-shaped baffle 6 and sealed and fixedly connected to one end of the composite pipe 9 and a position-adjustable support device installed on the support seat plate 7 and sealed and fixedly connected to the other end of the composite pipe 9, reliable support is realized when one end of the composite pipe 9 rotates and the other end is fixed, providing conditions for the experiments under the internal pressure, tension, bending, torsion and composite working conditions of the composite pipe 9, and solving the defects of the traditional experimental device being complicated, more expensive and difficult to maintain;

[0031] The specific structure of the position-adjustable support device is as follows: the position-adjustable support device includes a slider 5 and a right locking connection assembly. The upper plate surface of the support seat plate 7 is fixed with a guide rail 10 along its length direction, and the slider 5 is adaptively connected to the guide rail 10. With the cooperation of the guide rail 10 and the slider 5, adaptive position adjustment conditions are provided for experiments under bending conditions, torsion conditions and tensile conditions, ensuring that the experimental process is carried out smoothly and stably; the right end of the composite pipe 9 is fixedly connected to the left end of the right locking connection assembly, and the right end of the right locking connection assembly is fixedly connected to the right water injection pipe 1, the slider 5 is axially positioned and connected to the right locking connection assembly, and when the slider 5 moves along the length direction of the guide rail 10, the position-adjustable support device is moved and adjusted along the length direction of the support seat plate 7, and the slider 5 is provided with a fixing bolt whose inner end is pressed against the guide rail 10; specifically, the specific structure of the right locking connection assembly is as follows: the right locking connection assembly includes a locking joint 3, a locking screw sleeve 14 and The right twist handle 2, the locking joint 3 is in a T-shaped sleeve structure, the right end of the composite pipe 9 is fixedly connected to the small diameter section of the left end of the locking joint 3, and the locking screw sleeve 14 which is sleeved on the locking joint 3 and positioned with the large diameter section is threadedly connected to the left end of the right twist handle 2, and the right twist handle 2 and the locking joint 3 are tightened and sealed under the tightening connection of the locking screw sleeve 14; two sliders 5 which are adapted to be connected to the guide grooves on the corresponding sides are symmetrically provided on both sides of the right end of the guide rail 10, and the sliders 5 are in an L-shaped stepped structure, the right twist handle 2 is located between the two sliders 5, and the locking bolt 13 which is threadedly connected to the upper end of the vertical edge of the slider 5 is adapted to the positioning ring groove 15 on the outer circumferential wall of the right twist handle 2, and the inner end of the locking bolt 13 is contacted and locked with the bottom of the positioning ring groove 15 by rotating the locking bolt 13, so as to realize the locking and fixing of the right end of the composite pipe 9; specifically, a sealing ring which contacts and seals with the right end face of the locking joint 3 is installed on the left end face of the right twist handle 2.

[0032] The specific structure of the rotation support device is as follows: the rotation support device includes a locking joint 3, a locking screw sleeve 14, a connecting joint 16 and a left twist handle 12, the lower end of the L-shaped baffle 6 is formed with an avoidance groove for avoiding the guide rail 10, and the lower end of the L-shaped baffle 6 adapted to the avoidance groove and the guide rail 10 is fixed on the support seat plate 7, the bearing 4 is positioned and installed in the stepped hole on the vertical plate surface of the L-shaped baffle 6, and the pressure cover 11 fixed on the left side surface of the vertical plate of the L-shaped baffle 6 positions the bearing 4, the connecting joint 16 is a multi-stage stepped sleeve structure, and the small diameter section at the left end of the connecting joint 16 is adapted to connect with the bearing 4 and pass through the pressure cover 11 and is threadedly fixed to the left twist handle 12 The left end of the composite pipe 9 is fixedly connected to the small-diameter section of the right end of the locking joint 3, and the locking screw sleeve 14 which is sleeved on the locking joint 3 and positioned with the large-diameter section is threadedly connected to the right end of the connecting joint 16, and under the tightening connection action of the locking screw sleeve 14, the left twisting handle 12 and the locking joint 3 are tightened and sealed, wherein the distance between the opposite sides of the locking sleeve 3-2 of the locking screw sleeve 14 should be greater than the length of the threaded connection section of the locking screw sleeve 14 and the connecting joint 16, so that it can be ensured that the locking screw sleeve 14 is smoothly separated from the connecting joint 16 when the composite pipe 9 is disassembled; specifically, the right end face of the connecting joint 16 is equipped with a sealing ring which is in contact and pressed with the left end face of the locking joint 3.

[0033] The specific structure of the locking joint 3 is as follows: the locking joint 3 includes a core tube 3-1 and a locking sleeve 3-2, the outer contour of the core tube 3-1 is a three-stage stepped sleeve structure with a diameter decreasing from the outside to the inside, a positioning convex ring 3-4 is formed at the outer edge of the inner hole of the locking sleeve 3-2, and the positioning convex ring 3-4 is adapted to the positioning groove on the outer wall of the middle diameter section of the core tube 3-1, and a plurality of tooth grooves 3-3 are evenly distributed on the inner hole wall of the locking sleeve 3-2 and the outer circumferential wall of the small diameter section of the core tube 3-1, and the composite tube 9 which is sleeved on the small diameter section of the core tube 3-1 and located between the ratchet teeth 3-3 of the small diameter section of the core tube 3-1 and the ratchet teeth 3-3 on the inner hole wall of the locking sleeve 3-2 is sealed and fixed to the core tube 3-1 by the compression-deformed locking sleeve 3-2. The sealing connection between the end of the composite pipe 9 and the locking joint 3 is realized; specifically, the small diameter section of the core pipe 3-1 is formed with a plurality of sealing grooves 3-5 and the sealing ring adapted to the sealing groove 3-5 contacts and seals with the inner hole wall of the end of the composite pipe 9; in the above structure, the locking joint 3 composed of the core pipe 3-1 with a tooth groove 3-3 on the outer pipe wall and the locking sleeve 3-2 with a tooth groove 3-3 on the inner hole wall is adopted, which provides conditions for the rapid and reliable connection between the composite pipe 9 and the locking joint 3, and by arranging a plurality of sealing grooves 3-5 with sealing rings installed on the outer circumferential wall of the small diameter section of the pipe core 3-1, the reliable sealing between the composite pipe 9 and the locking joint 3 is realized, the sealing requirements of the internal pressure test are met, and the internal pressure test is completed accurately and effectively;

[0034] The specific shapes of the left twist handle 12 and the right twist handle 2 are as follows: the left twist handle 12 and the right twist handle 2 are both conical sleeve structures with an outer end diameter larger than an inner end diameter, and the flanges at the pipe mouths of the two water injection pipes 1 are respectively fixed to the end faces of the large diameter ends of the left twist handle 12 and the right twist handle 2 by multiple bolts, and are connected to the center holes inside the left twist handle 12 and the right twist handle 2.

[0035] The support seat plate 7 is a channel steel with its opening facing downward, and the channel steel is fixed on the base 8 .

[0036] In the internal pressure working condition, pressurized water is injected into the composite pipe 9 through the water injection pipe 1 by a water pump, so that the inside of the composite pipe 9 reaches the target pressure. During this process, the fixing bolts are in a loose state, so that the slider 5 is in a free adjustment state; in the bending working condition, downward pressure is applied to the right twist handles 2 at both ends to make the middle of the composite pipe 9 bend upward to achieve the required bending angle; in the torsion working condition, a torsional force is applied to the composite pipe 9 through the left twist handle 12 to twist the composite pipe 9 to the target angle; in the stretching working condition, a horizontal pulling force is applied to the slider 5 to stretch it to a specified position when the fixing bolts are loosened; since the above-mentioned working conditions are separate and do not affect each other, if you want to achieve the desired composite working condition, you can use the above-mentioned various working conditions to operate in sequence to obtain the composite working condition.

[0037] Specifically, Figure 3 and Figure 5 As shown, under the internal pressure condition, the composite pipe 9 is installed in the middle position of the experimental device, the fixing bolts are in a loose state, and the water pump is installed at the water inlet of the water injection pipe 1 through the connecting pipe. As the pressure rises, the composite pipe 9 will shrink or relax, and the slider 5 will slide along the guide rail 10 without causing additional damage to the composite pipe 9. When the internal pressure of the composite pipe 9 is tested, a pull-out force is generally applied on one side. For this experimental device, a horizontal pull-out force is applied to the right twist handle 2. When the applied internal pressure reaches the target pressure, the fixing bolts are tightened to fix the slider 5, so that the data of the composite pipe 9 at the end of the experiment can be measured.

[0038] like Figure 6 As shown in the figure, under the bending condition, the composite pipe 9 is installed in the middle position of the experimental device, the fixing bolt is in a loose state, and a downward force is applied to the right twist handle 2 to make the middle composite pipe 9 bend upward. When a large bending angle is required, the slider 5 is moved to the right position. Figure 6 Slide in the direction shown (i.e., leftward) to shorten the distance between the two ends, so that the composite tube 9 in the middle reaches a larger bending angle, so that the experimental device has a larger range of use. When the bending angle reaches the target angle, the fixing bolts threadedly connected to the top tightening guide rail 10 on the slider 5 are tightened to fix the slider 5, which facilitates the measurement of the data of the composite tube 9 at the end of the experiment.

[0039] like Figure 3 As shown, under the torsion condition, the composite pipe 9 is installed in the middle position of the experimental device, the fixing bolts threadedly connected to the top tightening guide rail 10 on the slider 5 are loosened, the slider 5 is in a free sliding state, and a clockwise or counterclockwise torsion force is applied to the left torsion handle 12 to twist the composite pipe 9 through the bearing 4. During the torsion of the composite pipe 9, the whole may shrink and the slider 5 will slide. When the composite pipe 9 is twisted to the target angle, the fixing bolts are tightened to fix the slider 5, so that the data of the composite pipe 9 at the end of the experiment can be measured.

[0040] like Figure 5 As shown, under the stretching condition, the composite tube 9 is installed in the middle position of the experimental device, and the fixing bolts are loosened so that the slider 5 is in a free sliding state. A horizontal outward traction force is applied to the right twist handle 2. By pulling the slider 5, the composite tube 9 is also stretched. When the composite tube 9 is stretched to the specified position, the fixing bolts are tightened, and then the data is sorted.

[0041] Under the composite working condition, the composite pipe 9 will be affected by more than one working condition load during its service. In this experimental device, it is only necessary to follow the above steps, operate the required working condition requirements, and operate the experimental process in sequence to complete the composite working condition.

[0042] Four high-strength bolts are installed on the base 8, so that the base 8 can be installed in any scene where an experiment is required, realizing the convenience of the experimental device. The movable experimental device also reduces the experimental cost, and there is no need to find supporting professional equipment such as a booster pump and a traction machine for the experimental device. The experiment can be completed by simply installing the structure in a laboratory with these professional equipment.

[0043] By installing the locking bolt 13, the axial position of the composite pipe 9 can be ensured, the detection accuracy can be improved, and the installation of the support seat plate 7 can provide the experimenter with a larger operating space and increase the experimental range. The composite pipe 9 can have a larger bending angle when bending. The installation of the composite pipe 9 adopts a method of fixing one end and freeing the other end, which can ensure the stability of the experimental table in the composite pipe 9 experiment. Under the above experimental conditions, the experiment can be completed with one end free, reducing the operation process and saving costs. The track 10 and the slider 5 are used to move in the horizontal direction, and the stretched distance of the composite pipe 9 can be measured more accurately under the stretching condition.

[0044] The technical solution has a simple structure, novel design, is easy to maintain, easy to assemble and repair, low cost, and easy to promote and use. It can simulate a variety of environmental conditions and can complete experiments under various conditions more accurately and conveniently.

[0045] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Composite pipe multi-operating condition experimental device, characterized by: The invention comprises a base (8), wherein the stepped surfaces at both ends of the base (8) are each provided with at least two bolts for detachably fixing to the experimental position, a support seat plate (7) is fixed to the upper end surface of the base (8), an L-shaped baffle plate (6) is fixed to the left end of the support seat plate (7), and a rotation support device installed on the vertical plate of the L-shaped baffle plate (6) and a position-adjustable support device installed along the support seat plate (7) are coaxially arranged, and the outer ends of the rotation support device and the position-adjustable support device are both sealed and fixedly connected to a water injection pipe (1) which is in communication with the interior thereof; The rotating support device is sealed and fixedly connected to the left end of the composite pipe (9), and the position-adjustable support device is sealed and connected to the right end of the composite pipe (9), and pressurized water is injected into the composite pipe (9) through the water injection pipes (1) at both ends, or a torsional force is applied to the left end of the composite pipe (9) through the rotating support device, or a horizontal traction force is applied to the position-adjustable support device, or a downward pressure is applied to the position-adjustable support device, so as to realize experiments on the internal pressure working condition of the composite pipe (9), the torsional working condition, the tensile working condition, or the bending working condition of the composite pipe (9).

2. The composite pipe multi-operating condition experimental device according to claim 1, characterized in that: The position-adjustable support device comprises a slider (5) and a right locking connection assembly; a guide rail (10) is fixed to the upper plate surface of the support seat plate (7) along its length direction, and the slider (5) is adaptively connected to the guide rail (10); the right end of the composite pipe (9) is fixedly connected to the left end of the right locking connection assembly, and the right end of the right locking connection assembly is fixedly connected to the right water injection pipe (1); the slider (5) is axially positioned and connected to the right locking connection assembly, and when the slider (5) moves along the length direction of the guide rail (10), the position-adjustable support device is moved and adjusted along the length direction of the support seat plate (7); a fixing bolt with an inner end pressed against the guide rail (10) is provided on the slider (5).

3. The composite pipe multiple working condition experimental device according to claim 2, characterized in that: The right locking connection assembly comprises a locking joint (3), a locking screw sleeve (14) and a right twisting handle (2), wherein the locking joint (3) is in a T-shaped sleeve structure, the right end of the composite pipe (9) is fixedly connected to the small diameter section of the left end of the locking joint (3), and the locking screw sleeve (14) sleeved on the locking joint (3) and positionedly connected to the large diameter section thereof is threadedly connected to the left end of the right twisting handle (2), and under the tightening connection action of the locking screw sleeve (14), the right twisting handle (2) and the locking joint (3) are tightened and sealed; Two sliding blocks (5) are symmetrically arranged on both sides of the right end of the guide rail (10) and are adapted to be connected to the guide grooves on the corresponding sides. The sliding blocks (5) are in an L-shaped stepped structure. The right twist handle (2) is located between the two sliding blocks (5). A locking bolt (13) threadedly connected to the upper end of the vertical edge of the sliding block (5) is adapted to be in a positioning ring groove (15) on the outer circumferential wall of the right twist handle (2). The locking bolt (13) is rotated to make its inner end contact and lock with the bottom of the positioning ring groove (15), thereby realizing locking and fixing the right end of the composite pipe (9).

4. The composite pipe multiple working condition experimental device according to claim 3 is characterized in that: The left end surface of the right twist handle (2) is provided with a sealing ring which contacts and seals with the right end surface of the locking joint (3).

5. The composite pipe multi-operating condition experimental device according to claim 2, characterized in that: The rotation support device comprises a locking joint (3), a locking screw sleeve (14), a connecting joint (16) and a left twisting handle (12); the lower end of the L-shaped baffle (6) is provided with an escape groove for escaping the guide rail (10); the lower end of the L-shaped baffle (6) adapted to the escape groove and the guide rail (10) is fixed on the support seat plate (7); a bearing (4) is positioned and installed in the stepped hole on the vertical plate surface of the L-shaped baffle (6); a pressure cover (11) fixed on the left side surface of the vertical plate of the L-shaped baffle (6) positions the bearing (4); the connecting joint (16) is a multi-stage stepped sleeve structure, and the small diameter section at the left end of the connecting joint (16) is adapted to be connected with the bearing (4) and passes through the pressure cover (11) and is threadedly fixedly connected with the left twist handle (12). The left end of the composite pipe (9) is fixedly connected with the small diameter section at the right end of the locking joint (3), and the locking screw sleeve (14) which is sleeved on the locking joint (3) and positionedly connected with its large diameter section is threadedly connected with the right end of the connecting joint (16), and under the tightening connection action of the locking screw sleeve (14), the left twist handle (12) and the locking joint (3) are tightened and sealed.

6. The composite pipe multiple working condition test device according to claim 5, characterized in that: The right end surface of the connecting joint (16) is provided with a sealing ring which contacts and presses against the left end surface of the locking joint (3).

7. The composite pipe multiple working condition test device according to claim 3, 4, 5 or 6, characterized in that: The locking joint (3) comprises a core tube (3-1) and a locking sleeve (3-2). The outer contour of the core tube (3-1) is a three-stage stepped sleeve structure with a diameter decreasing from the outside to the inside. A positioning convex ring (3-4) is formed at the outer edge of the inner hole of the locking sleeve (3-2), and the positioning convex ring (3-4) is adapted to fit in the positioning groove on the outer wall of the middle diameter section of the core tube (3-1). The inner hole wall of the locking sleeve (3-2) and the core tube (3-1) are connected to each other. -1) is evenly distributed with a plurality of tooth grooves (3-3) on the outer circumferential wall of the small diameter section, and the composite tube (9) which is sleeved on the small diameter section of the core tube (3-1) and located between the ratchet teeth (3-3) of the small diameter section of the core tube (3-1) and the ratchet teeth (3-3) on the inner hole wall of the locking sleeve (3-2) is sealed and fixed on the core tube (3-1) by the compression-deformed locking sleeve (3-2), thereby achieving sealed fixed connection between the end of the composite tube (9) and the locking joint (3).

8. The composite pipe multiple working condition experimental device according to claim 7, characterized in that: The small diameter section of the core tube (3-1) is provided with a plurality of sealing grooves (3-5), and the sealing rings adapted to fit in the sealing grooves (3-5) are in contact and sealed with the inner hole wall of the end of the composite tube (9).

9. The composite pipe multiple working condition test device according to claim 8, characterized in that: The left twist handle (12) and the right twist handle (2) are both tapered sleeve structures with an outer diameter larger than an inner diameter, and the flanges at the pipe openings of the two water injection pipes (1) are respectively fixed to the large-diameter end surfaces of the left twist handle (12) and the right twist handle (2) by a plurality of bolts, and are connected to the central holes inside the left twist handle (12) and the right twist handle (2).

10. The composite pipe multi-operating condition experimental device according to claim 1, characterized in that: The support seat plate (7) is a channel steel with its opening facing downward, and the channel steel is fixed on the base (8).

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