A tube-shell heat exchanger pipeline strength testing device

Abstract

The present invention relates to the technical field of heat exchanger pipe strength testing, and specifically provides a shell-and-tube heat exchanger pipe strength testing device, including: a base, a fixed feeding mechanism, a water pressure conveying and connecting mechanism, and a width adjusting mechanism. Through the fixed feeding mechanism, the U-shaped pipe is supported, conveyed, fed, and fixed at the ends, enabling the two ends of the U-shaped pipe to horizontally move and align with the joint pipe in the water pressure conveying and connecting mechanism for connection, improving the accuracy of the connection between the U-shaped pipe and the joint pipe. Then, through the sealing and pressing group, the connection between the U-shaped pipe and the joint pipe is covered and sealed, not only improving the sealing effect at the connection between the U-shaped pipe and the joint pipe, avoiding leakage at the connection between the U-shaped pipe and the joint pipe, but also achieving axial limitation of the arc-shaped clamping plate, greatly improving the sealing effect and connection stability between the U-shaped pipe and the joint pipe during the water pressure strength test.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchanger pipe strength testing, and specifically provides a shell-and-tube heat exchanger pipe strength testing device. Background Art

[0002] A shell-and-tube heat exchanger is a widely used heat exchange device, which is widely used in many industries such as petrochemical, pharmaceutical, energy, food processing, etc. The shell-and-tube heat exchanger consists of a shell and a group of pipes passing through the shell.

[0003] During the production process of the pipes of the shell-and-tube heat exchanger, it is necessary to conduct a hydrostatic strength test on the pipes. The hydrostatic strength test of the shell-and-tube heat exchanger pipes is very important for ensuring the safe operation and long-term reliability of the heat exchanger. It can effectively verify the design and manufacturing quality of the heat exchanger and ensure that it can operate safely and reliably under the expected working conditions.

[0004] The pipes of the shell-and-tube heat exchanger are in a U-shaped structure (as Figure 3 shown). When conducting a hydrostatic strength test on the U-shaped pipe, it is necessary to inject water and pressurize from both ends of the U-shaped pipe into the U-shaped pipe, which can intuitively detect the performance of the U-shaped pipe under high pressure and ensure the quality of the U-shaped pipe. However, currently, during the process of conducting a hydrostatic strength test on the U-shaped pipe, the movement of the U-shaped pipe and its connection with the hydrostatic water injection mechanism are both manually pushed and aligned. It is easy to occur tilting movement, resulting in inaccurate alignment between the U-shaped pipe and the hydrostatic water injection mechanism. Furthermore, when injecting water and pressurizing into the U-shaped pipe, water will leak from the connection between the U-shaped pipe and the hydrostatic water injection mechanism, causing inaccurate hydrostatic strength test of the U-shaped pipe; and when injecting water and pressurizing into the U-shaped pipe, the U-shaped pipe will be subjected to the pressure of water, so that the clamping members for fixing the U-shaped pipe will also be indirectly subjected to pressure. Therefore, when the clamping force of the clamping members is small or the clamping members are unstable, leakage will also occur at the connection between the U-shaped pipe and the hydrostatic water injection mechanism. Summary of the Invention

[0005] In view of the above problems, the embodiments of the present application provide a shell-and-tube heat exchanger pipe strength testing device to solve the technical problems in the related art.

[0006] To achieve the above object, the embodiments of the present application provide the following technical solutions: A shell-and-tube heat exchanger pipe strength testing device, comprising: a base, on the top of the base, three L-shaped platforms are arranged along its width direction, and a fixed feeding mechanism for fixing the horizontal section of the U-shaped pipe and driving the U-shaped pipe to feed horizontally is jointly provided by the three L-shaped platforms. On the top of one end of the base close to its length direction, a fixed seat is installed, and a hydrostatic pressure transmission connection mechanism is arranged on the top of the fixed seat.

[0007] The fixed feeding mechanism includes a supporting platform fixedly connected to the top of the base, the supporting platform is located between the L-shaped platform and the fixed seat, the top of the supporting platform is slidably connected with a clamping group symmetrically arranged along its length direction, the two clamping groups are respectively used to clamp the two horizontal section ends of the U-shaped tube, and four rotating shafts are connected to the three L-shaped platforms for common rotation, wherein the two rotating shafts close to the fixed seat are symmetrically arranged up and down, and the remaining two rotating shafts are arranged along the length direction of the L-shaped platform, one end of the two rotating shafts arranged up and down passes through the corresponding L-shaped platform and is installed with a gear, the two gears are meshed for transmission, and one of the rotating shafts installed with the gear is connected to an external driving motor, and the four rotating shafts are jointly provided with a supporting and conveying feeding group symmetrically arranged along the axis of the rotating shaft, and a supporting bracket is provided on the side of the L-shaped platform located in the middle away from the fixed seat, and a positioning and pushing group is provided on the supporting bracket.

[0008] In one possible implementation, the supporting conveying feed group includes conveying wheels connected to two rotating shafts arranged up and down by spline matching, and supporting wheels are connected to the remaining rotating shafts by spline matching. The middle side walls of the supporting wheel and the conveying wheel are provided with arc-shaped annular grooves circumferentially cut around their respective axes, and the upper and lower conveying wheels cooperate to convey the horizontal section of the U-shaped tube.

[0009] In one possible implementation, the positioning and pushing group includes a spring groove opened on the top of the support frame, a movable seat is slidably connected to the spring groove, the movable seat and the spring groove are connected by a pushing spring, and two limiting rollers arranged along the length direction of the base are installed on the top of the movable seat.

[0010] The hydraulic transmission connection mechanism includes two support seats connected to the top of the fixed seat and sliding along its length direction. A hydraulic connection group is arranged on the top of the support seat. A sealing pressing group is arranged on the fixed seat to compress, lock and seal the connection between the clamping group and the hydraulic connection group when they are matched and connected.

[0011] In one possible implementation, the clamping group includes two sliding seats slidably connected to a support platform and symmetrically arranged along their length direction, the sliding seats are provided with guide grooves symmetrically arranged along their length direction, a support plate is slidably connected to the guide groove, arc-shaped clamping plates are installed on opposite surfaces of the two support plates on the same sliding seat, the horizontal section of the U-shaped tube is located between the two arc-shaped clamping plates on the same sliding seat, and an electric slider is installed on the support plate to drive it to slide along the guide groove.

[0012] In one possible implementation, the water pressure connection group includes a joint pipe, which is fixedly mounted on a support seat via a fixing ring fixedly sleeved thereon, both ends of the joint pipe extend out of both ends of the fixing ring, an annular sealing gasket is installed at one end of the joint pipe close to the arc-shaped clamping plate, and the other end of the joint pipe is connected to an external water supply device.

[0013] In a possible implementation manner, ear plates are installed on the outer ring surface of the arc-shaped clamping plate. An L-shaped clamping rod is installed on the side of the ear plate close to the fixed seat. Two arc-shaped seats are symmetrically arranged on the outer wall of the fixed ring, and L-shaped clamping grooves corresponding to the L-shaped clamping rods one by one are formed on the arc-shaped seats.

[0014] In a possible implementation manner, the sealing and pressing group includes two guiding plates symmetrically arranged up and down on the outer wall of the fixed ring. An arc-shaped pressing plate that slides up and down is installed on the end face of the guiding plate close to the support platform. The two upper and lower arc-shaped pressing plates are symmetrically arranged, and a sealing rubber gasket is installed on the inner arc surface of the arc-shaped pressing plate. A clamping strip is installed on the end face of the arc-shaped pressing plate close to the support platform. Pressing grooves are formed on the opposite faces of the two upper and lower clamping strips. Convex strips are installed on the outer walls at both ends of the arc-shaped clamping plate. The arc-shaped clamping plate is located between the two upper and lower clamping strips. A lifting drive assembly that is horizontally slidably connected to the arc-shaped pressing plate is arranged on the fixed seat. The lifting drive assembly is used to drive the two upper and lower arc-shaped pressing plates to move and press-seal the joint between the U-shaped pipe and the connecting pipe.

[0015] In a possible implementation manner, the lifting drive assembly includes two upper and lower lifting plates. A pushing plate is installed on the outer ring surface of the arc-shaped pressing plate. The two upper pushing plates are slidably connected to the upper lifting plate, and the two lower pushing plates are slidably connected to the lower lifting plate. Two brackets symmetrically arranged along the length direction are installed on the top of the fixed seat. A double-acting cylinder is installed on each of the two brackets. The two telescopic ends of the double-acting cylinder are respectively connected to the two upper and lower lifting plates.

[0016] In a possible implementation manner, a slot is formed at one end of the arc-shaped pressing plate, and a plug is installed at the other end. The slots and plugs on the two upper and lower arc-shaped pressing plates are arranged in a staggered manner.

[0017] A width adjustment mechanism is arranged on the support platform. The width adjustment mechanism is used to adjust the distances between the two supporting and conveying feeding groups, between the two clamping groups, between the two water pressure connection groups, and between the two sealing and pressing groups simultaneously.

[0018] In a possible implementation manner, the width adjustment mechanism includes two sliding grooves symmetrically arranged along the length direction on the support platform. A bidirectional screw is rotatably connected between the two sliding grooves. The bidirectional screw is connected to the two sliding seats by means of threaded cooperation. One end of each of the supporting wheel and the conveying wheel is rotatably connected with a connecting cylinder. A connecting strip is installed between the connecting cylinders on the same side arranged along the width direction of the base. The connecting strip extends above the sliding seat and the support seat. The top of the sliding seat and the top of the support seat are both connected to the connecting strip through vertical plates.

[0019] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A pipe shell heat exchanger pipe strength testing device designed by the present invention uses a fixed feeding mechanism to support, convey, feed, and fix the ends of the U-shaped pipes, enabling the two ends of the U-shaped pipes to horizontally move and align with the joint pipes in the water pressure conveying and connecting mechanism for connection. This improves the accuracy of the connection between the U-shaped pipes and the joint pipes. Subsequently, the sealing and pressing group wraps and seals the connection between the U-shaped pipes and the joint pipes, not only improving the sealing effect of the connection between the U-shaped pipes and the joint pipes, but also being able to press the arc-shaped clamping plates up and down. At the same time, axial limiting of the arc-shaped clamping plates is achieved, and the integrated pressing and fixing effect of the clamping group, the water pressure connection group, and the connection between the U-shaped pipes and the joint pipes is realized, greatly improving the sealing effect and connection stability between the U-shaped pipes and the joint pipes during the water pressure strength test.

[0020] 2. The present invention adjusts the distances between the two support and conveying feed groups, the two clamping groups, the two water pressure connection groups, and the two sealing and pressing groups through the width adjustment mechanism, so as to be applicable to U-shaped pipes of different widths, thereby expanding the scope of use of this pipe strength testing device.

[0021] 3. The driving force of the support and conveying feed group makes the end of the U-shaped pipe tightly press and seal with the annular sealing gasket at the end of the joint pipe. The double sealing of pressing and wrapping the connection between the U-shaped pipe and the joint pipe through the sealing rubber gasket greatly improves the sealing effect when the U-shaped pipe is connected to the joint pipe, effectively preventing leakage during the test.

[0022] 4. The sealing and pressing group in the present invention axially limits the arc-shaped clamping plates, avoiding the indirect driving force of the water pressure on the U-shaped pipe on the arc-shaped clamping plates during the test, which may lead to unstable fixation of the arc-shaped clamping plates and the U-shaped pipe, resulting in movement of the U-shaped pipe and leakage at the connection between the U-shaped pipe and the joint pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0024] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention.

[0025] Figure 2 is the partial three-dimensional structure schematic diagram of the water pressure conveying and connecting mechanism of the present invention.

[0026] Figure 3 It is a schematic three-dimensional structure diagram of a U-shaped tube.

[0027] Figure 4 It is of the present invention Figure 1 top view.

[0028] Figure 5 It is of the present invention Figure 1 partial three-dimensional structure sectional view.

[0029] Figure 6 It is of the present invention Figure 5 enlarged view at position B in it.

[0030] Figure 7 It is of the present invention Figure 4 sectional view of stepped A-A direction.

[0031] Figure 8 It is of the present invention Figure 7 enlarged view at position C in it.

[0032] Figure 9 It is of the present invention Figure 5 enlarged view at position D in it.

[0033] Figure 10 It is a sectional view in the downward direction of the arc-shaped seat, L-shaped card slot and L-shaped card rod of the present invention.

[0034] Reference numerals: 1, base; 2, L-shaped table; 3, fixed feeding mechanism; 30, support table; 31, clamping group; 310, sliding seat; 311, guiding groove; 312, support plate; 313, arc-shaped clamping plate; 32, rotating shaft; 33, supporting and conveying feeding group; 330, conveying wheel; 331, supporting wheel; 332, arc-shaped annular groove; 34, supporting bracket; 35, positioning and pushing group; 350, spring groove; 351, moving seat; 352, pushing spring; 353, limiting roller; 4, fixed seat; 5, water pressure conveying connection mechanism; 50, support seat; 51, water pressure connection group; 510, joint pipe; 511, fixing ring; 512, annular sealing gasket; 52, sealing pressing group; 520, guiding plate; 521, arc-shaped pressing plate; 522, sealing rubber gasket; 523, clamping strip; 524, pressing card slot; 525, convex strip; 530, ear plate; 531, L-shaped card rod; 532, arc-shaped seat; 533, L-shaped card slot; 540, lifting plate; 541, pushing plate; 542, bracket; 543, double-acting cylinder; 550, inserting block; 6, width adjusting mechanism; 60, sliding slot; 61, bidirectional screw; 62, connecting cylinder; 63, connecting strip; 7, U-shaped tube. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Refer to Figure 1 , a pipe strength testing device for a shell-and-tube heat exchanger, comprising: a base 1, on the top of the base 1, three L-shaped platforms 2 are arranged along its width direction, and a fixed feeding mechanism 3 for fixing the horizontal section of the U-shaped pipe 7 and driving the horizontal feeding of the U-shaped pipe 7 is jointly provided by the three L-shaped platforms 2. On the top of one end of the base 1 close to its length direction, a fixed seat 4 is installed, and a water pressure conveying connection mechanism 5 is arranged on the top of the fixed seat 4.

[0038] Refer to Figure 1 , the fixed feeding mechanism 3 includes a support platform 30 fixedly connected to the top of the base 1. The support platform 30 is located between the L-shaped platform 2 and the fixed seat 4. A clamping group 31 symmetrically arranged along its length direction is slidably connected to the top of the support platform 30. The two clamping groups 31 are respectively used for clamping the two ends of the horizontal section of the U-shaped pipe 7. Four rotating shafts 32 are jointly rotatably connected to the three L-shaped platforms 2. Among them, the two rotating shafts 32 close to the fixed seat 4 are arranged symmetrically up and down, and the other two rotating shafts 32 are arranged along the length direction of the L-shaped platform 2. One end of the two rotating shafts 32 arranged up and down penetrates through the corresponding L-shaped platform 2 and is installed with a gear. The two gears are meshed and driven, and one of the rotating shafts 32 installed with a gear is connected to an external driving motor. A supporting conveying and feeding group 33 symmetrically arranged along the axial direction of the rotating shaft 32 is jointly provided on the four rotating shafts 32. On the side of the middle L-shaped platform 2 away from the fixed seat 4, a supporting bracket 34 is arranged, and a positioning and pushing group 35 is arranged on the supporting bracket 34.

[0039] Refer to Figure 1 , the supporting conveying and feeding group 33 includes conveying wheels 330 connected to the two rotating shafts 32 arranged up and down by spline fitting, and supporting wheels 331 are connected to the other rotating shafts 32 by spline fitting. Arc-shaped annular grooves 332 cut circumferentially around their respective axes are opened on the middle side walls of the supporting wheels 331 and the conveying wheels 330. The upper and lower two conveying wheels 330 cooperate to convey the horizontal section of the U-shaped pipe 7.

[0040] Place the two horizontal sections of the U-shaped tube 7 on two supporting wheels 331 on the same rotating shaft 32 respectively. The horizontal sections of the U-shaped tube 7 are received through the arc-shaped ring grooves 332 in the middle of the supporting wheels 331. Limit the arc section of the U-shaped tube 7 through the positioning and pushing group 35, and the positioning and pushing group 35 pushes the U-shaped tube 7 through adaptive elasticity, so that the end of the horizontal section of the U-shaped tube 7 abuts against the arc-shaped ring grooves 332 of the upper and lower conveying wheels 330. Then start the external driving motor, and the external driving motor drives the connected rotating shaft 32 to rotate. The upper and lower rotating shafts 32 drive the upper and lower conveying wheels 330 to rotate under the action of gear meshing. The conveying wheels 330 rotate to drive the U-shaped tube 7 to move towards the water pressure conveying connection mechanism 5 until the end of the U-shaped tube 7 abuts and cooperates tightly with the water pressure conveying connection mechanism 5, thereby realizing the automatic feeding of the U-shaped tube 7. Through the feeding of the upper and lower conveying wheels 330, the accuracy of the alignment and pressing of the end of the U-shaped tube 7 with the water pressure conveying connection mechanism 5 is improved.

[0041] Refer to Figure 1 With Figure 4 , the positioning and pushing group 35 includes a spring groove 350 opened at the top of the supporting bracket 34. A moving seat 351 is slidably connected to the spring groove 350. The moving seat 351 and the spring groove 350 are connected by a pushing spring 352. Two limiting rollers 353 arranged along the length direction of the base 1 are installed on the top of the moving seat 351.

[0042] The arc section of the U-shaped tube 7 is stuck between the two limiting rollers 353. After the U-shaped tube 7 is placed on the supporting wheel 331, the pushing spring 352 pushes the end of the U-shaped tube 7 to abut against the conveying wheel 330 through the moving seat 351 and the two limiting rollers 353, so as to facilitate the horizontal movement of the U-shaped tube 7 driven by the conveying wheel 330 during rotation later.

[0043] Refer to Figure 1 , the water pressure conveying connection mechanism 5 includes two supporting seats 50 connected to the top of the fixed seat 4 and sliding along its length direction. A water pressure connection group 51 is arranged on the top of the supporting seat 50. A sealing and pressing group 52 is arranged on the fixed seat 4 to press, lock and seal the connection between the clamping group 31 and the water pressure connection group 51 when they are cooperatively connected.

[0044] When the end of the U-shaped tube 7 abuts and communicates tightly with the water pressure connection group 51, the clamping group 31 clamps and fixes the end of the U-shaped tube 7 to prevent the U-shaped tube 7 from moving under the action of water pressure when the water pressure conveying connection mechanism 5 conveys water into the U-shaped tube 7 for water pressure strength testing later, which affects the accuracy of the water pressure strength testing.

[0045] After that, the sealing and pressing group 52 is activated to seal the connection between the U-shaped tube 7 and the water pressure connection group 51. At the same time, the clamping group 31 is tightly pressed up and down and limited axially along the horizontal section of the U-shaped tube 7, which not only further improves the sealing effect between the U-shaped tube 7 and the water pressure connection group 51, but also improves the stability of the clamping group 31 in fixing the horizontal section of the U-shaped tube 7, further avoiding the movement of the U-shaped tube 7 under the action of water pressure.

[0046] Refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 , the clamping group 31 includes two sliding seats 310 that are slidably connected to the support platform 30 and are symmetrically arranged in the length direction. The sliding seats 310 are provided with guide grooves 311 that are symmetrically arranged in the length direction. A support plate 312 is slidably connected to the guide grooves 311. Arc-shaped clamping plates 313 are installed on the opposite surfaces of the two support plates 312 on the same sliding seat 310. The horizontal section of the U-shaped tube 7 is located between the two arc-shaped clamping plates 313 on the same sliding seat 310. An electric slider for driving the support plate 312 to slide along the guide groove 311 is installed on the support plate 312.

[0047] Refer to Figure 1 , Figure 2 and Figure 8 , the water pressure connection group 51 includes a joint pipe 510. The joint pipe 510 is fixedly installed on the support seat 50 through a fixing ring 511 fixedly sleeved thereon. Both ends of the joint pipe 510 extend out of both ends of the fixing ring 511. An annular sealing gasket 512 is installed at one end of the joint pipe 510 close to the arc-shaped clamping plate 313. The other end of the joint pipe 510 is connected to an external water supply device, and a water pressure detection instrument is provided on the external water supply device.

[0048] The U-shaped tube 7 moves towards the joint pipe 510 under the rotational conveying action of the conveying wheels 330 on the upper and lower sides, thereby improving the accuracy of aligning and pressing the end of the U-shaped tube 7 against the joint pipe 510. When the end of the U-shaped tube 7 abuts against the annular sealing gasket 512 on the joint pipe 510, the end of the U-shaped tube 7 and the end of the joint pipe 510 are sealed through the annular sealing gasket 512. After that, the electric slider drives the support plate 312 and the arc-shaped clamping plate 313 connected thereto to move towards the side wall of the U-shaped tube 7 until the two arc-shaped clamping plates 313 tightly clamp the side wall of the U-shaped tube 7, preventing the U-shaped tube 7 from moving under the action of water pressure.

[0049] Refer to Figure 2 , Figure 6 , Figure 8 and Figure 10, an ear plate 530 is installed on the outer ring surface of the arc-shaped clamping plate 313. An L-shaped clamping rod 531 is installed on the side of the ear plate 530 close to the fixed seat 4. Two symmetrically arranged arc-shaped seats 532 are installed on the outer wall of the fixed ring 511. An L-shaped clamping groove 533 corresponding to the L-shaped clamping rod 531 one by one is formed on the arc-shaped seat 532.

[0050] When the arc-shaped clamping plate 313 moves, the arc-shaped clamping plate 313 drives the ear plate 530 and the L-shaped clamping rod 531 of the arc-shaped seat 532 to move. When the L-shaped clamping rod 531 moves, it is inserted into the L-shaped clamping groove 533. The horizontal section of the L-shaped clamping rod 531 perpendicular to the axis of the horizontal section of the U-shaped pipe 7 cooperates with the L-shaped clamping groove 533, so as to limit the arc-shaped clamping plate 313 in the length direction of the base 1, improve the stability of the arc-shaped clamping plate 313 in fixing the U-shaped pipe 7, and avoid the U-shaped pipe 7 pulling the arc-shaped clamping plate 313 to move under the action of water pressure during the water pressure strength test, and further improve the accuracy of the water pressure strength test.

[0051] Refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 8 , the sealing and pressing group 52 includes two guide plates 520 arranged symmetrically up and down on the outer wall of the fixed ring 511. An arc-shaped pressing plate 521 that slides up and down is installed on the end face of the guide plate 520 close to the support table 30. The upper and lower two arc-shaped pressing plates 521 are symmetrically arranged, and a sealing rubber gasket 522 is installed on the inner arc surface of the arc-shaped pressing plate 521. A clamping strip 523 is installed on the end face of the arc-shaped pressing plate 521 close to the support table 30. Pressing grooves 524 are formed on the opposite faces of the upper and lower two clamping strips 523. Convex strips 525 are installed on the outer walls of both ends of the arc-shaped clamping plate 313. The arc-shaped clamping plate 313 is located between the upper and lower two clamping strips 523. A lifting drive assembly that is horizontally slidably connected to the arc-shaped pressing plate 521 is arranged on the fixed seat 4. The lifting drive assembly is used to drive the upper and lower two arc-shaped pressing plates 521 to move to press and seal the connection between the U-shaped pipe 7 and the joint pipe 510.

[0052] After the arc-shaped clamping plate 313 fixes the end of the U-shaped pipe 7, the lifting drive assembly drives the upper and lower two arc-shaped pressing plates 521 to move towards the connection between the U-shaped pipe 7 and the joint pipe 510. The upper and lower two arc-shaped pressing plates 521 cover and seal the connection between the U-shaped pipe 7 and the joint pipe 510 through the sealing rubber gasket 522, further improving the sealing effect of the connection between the U-shaped pipe 7 and the joint pipe 510, and avoiding leakage at the connection between the U-shaped pipe 7 and the joint pipe 510, which affects the accuracy of the water pressure strength test.

[0053] When the arc-shaped pressing plate 521 moves, it synchronously drives the clamping strip 523 to move towards the protruding strip 525, and the pressing groove 524 is pressed against the two abutted protruding strips 525, which not only realizes the up-and-down pressing of the arc-shaped clamping plate 313, but also realizes the axial limit of the arc-shaped clamping plate 313. At the same time, it also realizes the integrated pressing and fixing effect of the connection between the clamping group 31, the water pressure connection group 51 and the U-shaped pipe 7 and the joint pipe 510, greatly improving the sealing effect and connection stability between the U-shaped pipe 7 and the joint pipe 510 during the water pressure strength test.

[0054] Refer to Figure 5 、 Figure 6 and Figure 8 , the lifting drive assembly includes two upper and lower lifting plates 540. A pushing plate 541 is installed on the outer ring surface of the arc-shaped pressing plate 521. The two upper pushing plates 541 are slidably connected to the upper lifting plate 540, and the two lower pushing plates 541 are slidably connected to the lower lifting plate 540. Two brackets 542 are symmetrically arranged along the length direction on the top of the fixed seat 4, and two double-acting cylinders 543 are installed on the two brackets 542. The two telescopic ends of the double-acting cylinder 543 are respectively connected to the upper and lower lifting plates 540.

[0055] The double-acting cylinder 543 drives the upper and lower lifting plates 540 to move, and the lifting plate 540 pushes the arc-shaped pressing plate 521 through the pushing plate 541 to wrap and seal the connection between the U-shaped pipe 7 and the joint pipe 510.

[0056] Refer to Figure 6 and Figure 9 , one end of the arc-shaped pressing plate 521 is provided with a slot, and the other end is installed with a plug 550. The slots and plugs 550 on the upper and lower arc-shaped pressing plates 521 are arranged in a staggered manner. When the upper and lower arc-shaped pressing plates 521 move to press and wrap the connection between the U-shaped pipe 7 and the joint pipe 510, the slot and the plug 550 are inserted and matched, so that the upper and lower arc-shaped pressing plates 521 are relatively locked and limited, further improving the pressing and sealing effect of the connection between the U-shaped pipe 7 and the joint pipe 510.

[0057] Refer to Figure 1 , a width adjustment mechanism 6 is provided on the support platform 30. The width adjustment mechanism 6 is used to adjust the distance between the two supporting and conveying feed groups 33, the distance between the two clamping groups 31, the distance between the two water pressure connection groups 51, and the distance between the two sealing and pressing groups 52 at the same time.

[0058] When testing U-shaped tubes 7 with different widths, the distance between the two supporting and conveying feed groups 33, the distance between the two clamping groups 31, the distance between the two water pressure connection groups 51, and the distance between the two sealing and pressing groups 52 are adjusted through the width adjustment mechanism 6, so as to be applicable to the water pressure strength test of U-shaped tubes 7 with different widths, thereby expanding the application range of this pipeline strength test device.

[0059] Refer to Figure 1 、 Figure 4 and Figure 6 , the width adjustment mechanism 6 includes two sliding grooves 60 symmetrically arranged along the length direction on the support table 30. A bidirectional screw 61 is rotatably connected between the two sliding grooves 60. The bidirectional screw 61 is connected to the two sliding seats 310 by means of threaded cooperation. One end of each of the supporting wheel 331 and the conveying wheel 330 is rotatably connected with a connecting cylinder 62. Connecting bars 63 are installed between the connecting cylinders 62 on the same side arranged along the width direction of the base 1. The connecting bars 63 extend above the sliding seats 310 and the support seats 50. The top of the sliding seat 310 and the top of the support seat 50 are both connected to the connecting bars 63 through vertical plates.

[0060] One end of the bidirectional screw 61 penetrates through the support table 30 and is connected to an external driving motor. The rotation of the bidirectional screw 61 adjusts the distance between the two sliding seats 310 through its threaded cooperation with the two sliding seats 310. The sliding seats 310 drive the support seats 50 to move through the connecting bars 63, and at the same time drive the conveying wheel 330 and the supporting wheel 331 to axially move along their respective connected rotating shafts 32, so as to meet the requirements of U-shaped tubes 7 with different widths.

[0061] Refer to Figures 1 - 10 , during operation, the two horizontal sections of the U-shaped tube 7 are respectively placed on the two supporting wheels 331 on the same rotating shaft 32. Then, the U-shaped tube 7 is conveyed and fed through the cooperation of the positioning and pushing group 35 and the conveying wheels 330 on the upper and lower rotating shafts 32 until the end of the U-shaped tube 7 abuts tightly against the annular sealing gasket 512 on the joint pipe 510, thereby improving the accuracy of the butt joint and tight connection between the end of the U-shaped tube 7 and the joint pipe 510.

[0062] Then, the end of the U-shaped tube 7 is clamped and fixed by the clamping group 31 to prevent the U-shaped tube 7 from moving under the action of water pressure when the water pressure conveying and connecting mechanism 5 conveys water into the U-shaped tube 7 for the water pressure strength test, which affects the accuracy of the water pressure strength test of the U-shaped tube 7.

[0063] After that, the sealing and pressing group 52 is started. The sealing and pressing group 52 wraps and seals the connection between the U-shaped tube 7 and the water pressure connection group 51. At the same time, it presses the clamping group 31 up and down and limits the position along the axial direction of the horizontal section of the U-shaped tube 7. This not only further improves the sealing effect between the U-shaped tube 7 and the water pressure connection group 51, but also improves the stability of the clamping group 31 in fixing the horizontal section of the U-shaped tube 7, further avoiding the problem that the U-shaped tube 7 moves under the action of water pressure, which affects the accuracy of the water pressure strength test of the U-shaped tube 7.

[0064] During the water pressure strength detection process, after the internal water pressure of the U-shaped tube 7 reaches the set value, observe whether the U-shaped tube 7 cracks or deforms, so as to judge whether the test result of the U-shaped tube 7 is qualified.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0066] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0067] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A shell and tube heat exchanger pipeline strength testing device, characterized in that: include: The base has three L-shaped platforms arranged along its width direction installed on the top of the base. The three L-shaped platforms are jointly provided with a fixed feeding mechanism for fixing the horizontal section of the U-shaped tube and driving the horizontal feeding of the U-shaped tube. A fixed seat is installed on the top of the base near one end in the length direction. A hydraulic conveying connection mechanism is provided on the top of the fixed seat; The fixed feeding mechanism includes a support platform fixedly connected to the top of the base, the support platform is located between the L-shaped platform and the fixed seat, the top of the support platform is slidably connected with a clamping group symmetrically arranged along its length direction, the two clamping groups are respectively used to clamp the two horizontal section ends of the U-shaped tube, and the three L-shaped platforms are rotatably connected with four rotating shafts, of which the two rotating shafts close to the fixed seat are symmetrically arranged up and down, and the other two rotating shafts are arranged along the length direction of the L-shaped platform, and the four rotating shafts are jointly provided with a supporting conveying feeding group symmetrically arranged along the axis of the rotating shaft, and a supporting bracket is provided on the side of the L-shaped platform located in the middle away from the fixed seat, and a positioning and pushing group is provided on the supporting bracket; The hydraulic transmission connection mechanism includes two support seats connected to the top of the fixed seat and sliding along the length direction thereof, a hydraulic connection group is arranged on the top of the support seat, and a sealing pressing group is arranged on the fixed seat for pressing, locking and sealing the connection between the clamping group and the hydraulic connection group when they are matched and connected; A width adjustment mechanism is provided on the support table, and the width adjustment mechanism is used to simultaneously adjust the distance between the two supporting conveying feeding groups, the distance between the two clamping groups, the distance between the two hydraulic connection groups, and the distance between the two sealing pressing groups; The clamping group includes two sliding seats slidably connected to the support platform and symmetrically arranged along the length direction of the support platform, the sliding seats are provided with guide grooves symmetrically arranged along the length direction thereof, a support plate is slidably connected to the guide groove, arc-shaped clamping plates are installed on the opposite surfaces of the two support plates on the same sliding seat, the horizontal section of the U-shaped tube is located between the two arc-shaped clamping plates on the same sliding seat, and an electric slider is installed on the support plate to drive it to slide along the guide groove; The hydraulic connection group includes a joint pipe, which is fixedly mounted on the support seat through a fixed ring fixedly sleeved thereon, both ends of the joint pipe extend out of both ends of the fixed ring, and an annular sealing gasket is installed at one end of the joint pipe close to the arc clamping plate; The sealing pressing group includes two guide plates symmetrically arranged up and down mounted on the outer wall of the fixed ring, an arc-shaped support plate sliding up and down is mounted on the end face of the guide plate close to the support platform, the upper and lower arc-shaped support plates are symmetrically arranged and a sealing rubber gasket is mounted on the inner arc surface of the arc-shaped support plate, a clamping strip is mounted on the end face of the arc-shaped support plate close to the support platform, pressing grooves are provided on the opposite surfaces of the upper and lower clamping strips, convex strips are installed on the outer walls at both ends of the arc-shaped clamping plate, the arc-shaped clamping plate is located between the upper and lower clamping strips, the pressing grooves can be clamped on the two convex strips that are tightly pressed, and a lifting drive assembly horizontally slidingly connected to the arc-shaped support plate is arranged on the fixed seat, the lifting drive assembly is used to drive the upper and lower arc-shaped support plates to move to press and seal the tight connection between the U-shaped tube and the joint tube.

2. A shell and tube heat exchanger pipe strength testing device according to claim 1, characterized in that: The supporting and conveying feeding group includes conveying wheels connected to two rotating shafts arranged up and down by spline matching, and supporting wheels are connected to the remaining rotating shafts by spline matching. The middle side walls of the supporting wheel and the conveying wheel are provided with arc-shaped annular grooves circumferentially cut around their respective axes. The upper and lower conveying wheels cooperate to convey the horizontal section of the U-shaped tube.

3. A shell and tube heat exchanger pipeline strength testing device according to claim 2, characterized in that: The width adjustment mechanism includes two sliding grooves symmetrically arranged along the length direction of the support platform, a bidirectional screw is rotatably connected between the two sliding grooves, the bidirectional screw is connected to the two sliding seats by threaded cooperation, one end of the supporting wheel and the conveying wheel is rotatably connected to a connecting tube, a connecting strip is installed between the connecting tubes on the same side arranged along the width direction of the base, the connecting strip extends to above the sliding seat and the support seat, and the top of the sliding seat and the top of the support seat are connected to the connecting strip through a vertical plate.

4. The shell and tube heat exchanger pipeline strength testing device according to claim 2, characterized in that: The lifting drive assembly includes two upper and lower lifting plates, a push plate is installed on the outer ring surface of the arc-shaped push plate, the two push plates on the upper side are slidably connected to the lifting plate on the upper side, and the two push plates on the lower side are slidably connected to the lifting plate on the lower side, and two brackets symmetrically arranged along the length direction of the fixed seat are installed on the top of the fixed seat, and two bidirectional cylinders are installed on the two brackets, and the two telescopic ends of the bidirectional cylinders are respectively connected to the upper and lower lifting plates.

5. The shell and tube heat exchanger pipeline strength testing device according to claim 1, characterized in that: The positioning and pushing group includes a spring groove opened on the top of the support frame, a moving seat is slidably connected to the spring groove, the moving seat and the spring groove are connected by a pushing spring, and two limiting rollers arranged along the length direction of the base are installed on the top of the moving seat.

6. The shell and tube heat exchanger pipeline strength testing device according to claim 1, characterized in that: The outer ring surface of the arc clamping plate is installed with an ear plate, and an L-shaped clamping rod is installed on the side of the ear plate close to the fixed seat. The outer wall of the fixed ring is installed with two symmetrically arranged arc seats, and the arc seats are provided with L-shaped clamping grooves corresponding to the L-shaped clamping rods one by one.

7. The shell and tube heat exchanger pipeline strength testing device according to claim 1, characterized in that: A slot is provided at one end of the arc-shaped abutment plate, and an insert block is installed at the other end. The slots and insert blocks on the upper and lower arc-shaped abutment plates are arranged alternately.

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