Shell-and-tube heat exchanger pipeline strength testing device

Abstract

The invention relates to the technical field of heat exchanger pipeline strength testing, and particularly provides a shell-and-tube heat exchanger pipeline strength testing device which comprises a base, a fixed feeding mechanism, a water pressure conveying connecting mechanism and a width adjusting mechanism. The fixed feeding mechanism is used for carrying out bearing, conveying and feeding and end fixing on the U-shaped pipe, so that the two ends of the U-shaped pipe horizontally move to be aligned and connected with a joint pipe in the water pressure conveying and connecting mechanism, and the connecting accuracy of the U-shaped pipe and the joint pipe is improved; then the joint between the U-shaped pipe and the joint pipe is wrapped and sealed through the sealing pressing set, the sealing effect of the joint between the U-shaped pipe and the joint pipe is improved, leakage of the joint between the U-shaped pipe and the joint pipe is avoided, axial limiting of the arc-shaped clamping plate is achieved, and the sealing effect of the joint between the U-shaped pipe and the joint pipe is greatly improved when the water pressure strength is tested. And the sealing effect and the connection stability of the U-shaped pipe and the joint pipe are improved.

Description

Technical Field

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

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

[0003] During the production process of shell and tube heat exchanger pipes, it is necessary to perform water pressure strength test on the pipes. The water pressure strength test of shell and tube heat exchanger pipes is very important to ensure 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 tubes of the shell and tube heat exchanger are U-shaped (such as Figure 3 As shown, when the U-shaped tube is subjected to a water pressure strength test, water needs to be injected into the U-shaped tube from both ends to apply pressure, so that the performance of the U-shaped tube under high pressure can be visually detected to ensure the quality of the U-shaped tube. However, in the process of the water pressure strength test of the U-shaped tube, the movement of the U-shaped tube and the connection with the water pressure injection mechanism are all manually pushed and aligned, which is prone to tilting and movement, resulting in inaccurate alignment of the U-shaped tube and the water pressure injection mechanism, which in turn causes water to leak from the connection between the U-shaped tube and the water pressure injection mechanism when water is injected into the U-shaped tube for pressurization, resulting in inaccurate water pressure strength test of the U-shaped tube; and when water is injected into the U-shaped tube for pressurization, the U-shaped tube will be subjected to the pressure of the water, thereby causing the clamping member fixing the U-shaped tube to be indirectly subjected to pressure. Therefore, when the clamping force of the clamping member is small or the clamping member is unstable, the connection between the U-shaped tube and the water pressure injection mechanism will also leak. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a tube strength testing device for a shell and tube heat exchanger to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: a shell and tube heat exchanger pipeline strength testing device, comprising: a base, three L-shaped platforms arranged along its width direction are installed on the top of the base, and 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, and a fixed seat is installed on the top of the base near one end of its length direction, and a water pressure delivery connection mechanism is provided 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 one possible implementation, an ear plate is 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, and two symmetrically arranged arc-shaped seats are installed on the outer wall of the fixed ring, and L-shaped clamping grooves corresponding to the L-shaped clamping rods are opened on the arc-shaped seats.

[0014] In one possible implementation, 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, and a lifting drive assembly horizontally slidably 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 joint between the U-shaped tube and the joint tube.

[0015] In one possible implementation, 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 slidingly connected to the lifting plate on the upper side, and the two push plates on the lower side are slidingly 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.

[0016] In a possible implementation, a slot is provided at one end of the arc-shaped abutment plate, and an insert block is installed at the other end, and the slots and insert blocks on the upper and lower arc-shaped abutment plates are arranged alternately.

[0017] The support platform is provided with a width adjustment mechanism, which is used to simultaneously adjust the distance between the two supporting conveying feed groups, the distance between the two clamping groups, the distance between the two water pressure connection groups and the distance between the two sealing pressing groups.

[0018] In one possible implementation, the width adjustment mechanism includes two sliding grooves opened on the support platform and arranged symmetrically along the length direction thereof, 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.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A shell and tube heat exchanger pipeline strength testing device designed by the present invention supports, conveys and feeds the U-tube and fixes the ends thereof through a fixed feeding mechanism, so that the two ends of the U-tube move horizontally and align and connect with the joint pipe in the hydraulic conveying connection mechanism, thereby improving the accuracy of the connection between the U-tube and the joint pipe, and then the connection between the U-tube and the joint pipe is coated and sealed by a sealing pressing group, which not only improves the sealing effect of the connection between the U-tube and the joint pipe, but also can press the arc-shaped clamping plate up and down, and at the same time realizes the axial limitation of the arc-shaped clamping plate, and also realizes the integrated pressing and fixing effect of the clamping group, the hydraulic connection group and the connection between the U-tube and the joint pipe, thereby greatly improving the sealing effect and connection stability of the U-tube and the joint pipe during the hydraulic pressure strength test.

[0020] 2. The present invention adjusts the distance between the two supporting and conveying feed groups, the distance between the two clamping groups, the distance between the two water pressure connection groups, and the distance between the two sealing pressing groups through a width adjustment mechanism, so that it is suitable for U-shaped pipes of different widths, thereby expanding the scope of use of the pipeline strength testing device.

[0021] 3. The present invention supports the driving force of the conveying feed group so that the end of the U-shaped tube and the annular sealing gasket at the end of the joint tube are tightly sealed and connected, and the connection between the U-shaped tube and the joint tube is double-sealed by pressing and covering the sealing rubber gasket, which greatly improves the sealing effect when the U-shaped tube and the joint tube are connected, and effectively prevents leakage during testing.

[0022] 4. The sealing pressing group in the present invention limits the axial direction of the arc clamp to prevent the arc clamp from being subjected to the indirect driving force of the water pressure on the U-shaped tube during the test, resulting in unstable fixation of the arc clamp and the U-shaped tube, causing the U-shaped tube to move and causing leakage at the connection between the U-shaped tube and the joint tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

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

[0025] Figure 2 It is a partial three-dimensional structural schematic diagram of the water pressure delivery connection mechanism of the present invention.

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

[0027] Figure 4 The present invention Figure 1 Top view of the .

[0028] Figure 5 The present invention Figure 1 A partial three-dimensional structural cross-sectional view of .

[0029] Figure 6 The present invention Figure 5 Enlarged view of point B in .

[0030] Figure 7 The present invention Figure 4 AA stepped section view.

[0031] Figure 8 The present invention Figure 7 Enlarged view of point C in the figure.

[0032] Fig. 9 The present invention Figure 5 Enlarged view of point D in .

[0033] Fig.10 It is a top cross-sectional view of the arc-shaped seat, L-shaped clamping groove and L-shaped clamping rod of the present invention.

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

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0037] See also Figure 1 A tube and shell heat exchanger pipeline strength testing device comprises: a base 1, three L-shaped platforms 2 arranged along the width direction are installed on the top of the base 1, and the three L-shaped platforms 2 are jointly provided with a fixed feeding mechanism 3 for fixing the horizontal section of the U-shaped tube 7 and driving the horizontal feeding of the U-shaped tube 7, a fixed seat 4 is installed on the top of the base 1 near one end of the length direction, and a water pressure transmission connection mechanism 5 is arranged on the top of the fixed seat 4.

[0038] See also Figure 1 The fixed feeding mechanism 3 includes a supporting platform 30 fixedly connected to the top of the base 1, the supporting platform 30 is located between the L-shaped platform 2 and the fixed seat 4, the top of the supporting platform 30 is slidably connected with a clamping group 31 symmetrically arranged along its length direction, and the two clamping groups 31 are respectively used to clamp the two horizontal section ends of the U-shaped tube 7, and four rotating shafts 32 are rotatably connected on the three L-shaped platforms 2, wherein the two rotating shafts 32 close to the fixed seat 4 are symmetrically arranged up and down, and the remaining 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 passes through the corresponding L-shaped platform 2 and is installed with a gear, the two gears are meshed for transmission, and one of the rotating shafts 32 installed with a gear is connected to an external driving motor, and the four rotating shafts 32 are commonly provided with a supporting conveying feeding group 33 symmetrically arranged along the axis of the rotating shaft 32, and a supporting bracket 34 is provided on the side of the L-shaped platform 2 located in the middle away from the fixed seat 4, and a positioning and pushing group 35 is provided on the supporting bracket 34.

[0039] See also Figure 1 The supporting conveying feed group 33 includes conveying wheels 330 connected to two rotating shafts 32 arranged up and down by spline matching, and the remaining rotating shafts 32 are connected to supporting wheels 331 by spline matching. The middle side walls of the supporting wheels 331 and the conveying wheels 330 are provided with arc-shaped annular grooves 332 circumferentially cut around their respective axes. The upper and lower conveying wheels 330 cooperate to convey the horizontal section of the U-shaped tube 7.

[0040] 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, and the horizontal sections of the U-shaped tube 7 are supported by the arcuate annular groove 332 in the middle of the supporting wheel 331, and the arcuate section of the U-shaped tube 7 is limited by the positioning and pushing group 35, and the positioning and pushing group 35 pushes the U-shaped tube 7 through the adaptive elastic force, so that the ends of the horizontal sections of the U-shaped tube 7 are in conflict with the arcuate annular grooves 332 of the upper and lower conveying wheels 330, and then the external driving motor is started, and the external driving motor drives the rotating shaft 32 connected thereto to rotate, and the upper and lower rotating shafts 32 drive the upper and lower conveying wheels 330 to rotate under the action of gear meshing, and the conveying wheel 330 rotates to drive the U-shaped tube 7 to move toward the hydraulic conveying connection mechanism 5 until the end of the U-shaped tube 7 is tightly matched with the hydraulic conveying connection mechanism 5, thereby realizing the automatic feeding of the U-shaped tube 7, and the accuracy of the positioning and pressing of the end of the U-shaped tube 7 and the hydraulic conveying connection mechanism 5 is improved through the conveying and feeding of the upper and lower conveying wheels 330.

[0041] See also Figure 1 and Figure 4 The positioning and pushing group 35 includes a spring groove 350 opened on the top of the support frame 34, and a moving seat 351 is slidably connected to the spring groove 350. The moving seat 351 is connected to the spring groove 350 through 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 push spring 352 pushes the end of the U-shaped tube 7 to contact the conveying wheel 330 through the moving seat 351 and the two limiting rollers 353, so that the U-shaped tube 7 can be driven to move horizontally when the conveying wheel 330 rotates later.

[0043] See also Figure 1 The hydraulic transmission connection mechanism 5 includes two support seats 50 connected to the top of the fixed seat 4 and sliding along its length direction. A hydraulic connection group 51 is arranged on the top of the support seat 50. The fixed seat 4 is provided with a sealing pressing group 52 for pressing, locking and sealing the connection between the clamping group 31 and the hydraulic connection group 51 when they are matched and connected.

[0044] When the end of the U-shaped tube 7 is tightly connected to 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 delivery connection mechanism 5 delivers water into the U-shaped tube 7 for water pressure strength test, thereby affecting the accuracy of the water pressure strength test.

[0045] Then, the sealing pressing group 52 is started to seal the connection between the U-shaped tube 7 and the water pressure connection group 51, and at the same time, the clamping group 31 is pressed up and down and limited along the axial direction of 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 fixing the horizontal section of the U-shaped tube 7, and further avoids the movement of the U-shaped tube 7 under the action of water pressure.

[0046] See also 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 symmetrically arranged in the length direction thereof. The sliding seats 310 are provided with guide grooves 311 that are symmetrically arranged along the length direction thereof. A support plate 312 is slidably connected to the guide groove 311. The opposite surfaces of the two support plates 312 on the same sliding seat 310 are both installed with arc-shaped clamping plates 313. 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 is installed on the support plate 312 to drive it to slide along the guide groove 311.

[0047] See also Figure 1 , Figure 2 and Figure 8 The water pressure connection group 51 includes a joint pipe 510, which 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 the two 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 toward the joint tube 510 under the rotation and conveying action of the conveying wheels 330 on the upper and lower sides, thereby improving the accuracy of the alignment and tightening of the end of the U-shaped tube 7 with the joint tube 510. When the end of the U-shaped tube 7 is tightly pressed against the annular sealing gasket 512 on the joint tube 510, the end of the U-shaped tube 7 and the end of the joint tube 510 are sealed by the annular sealing gasket 512, and then the electric slider drives the supporting plate 312 and the arc-shaped clamping plate 313 connected thereto to move toward the side wall of the U-shaped tube 7 until the two arc-shaped clamping plates 313 clamp the side wall of the U-shaped tube 7 to prevent the U-shaped tube 7 from moving under the action of water pressure.

[0049] See also Figure 2 , Figure 6 , Figure 8 and Fig.10The outer ring surface of the arc-shaped clamping plate 313 is installed with an ear plate 530, and the side of the ear plate 530 close to the fixed seat 4 is installed with an L-shaped clamping rod 531. The outer wall of the fixed ring 511 is installed with two symmetrically arranged arc-shaped seats 532, and the arc-shaped seats 532 are provided with L-shaped clamping grooves 533 corresponding to the L-shaped clamping rods 531 one by one.

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

[0051] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 8 The sealing pressing group 52 includes two guide plates 520 symmetrically arranged up and down mounted on the outer wall of the fixing ring 511, an arc-shaped abutment plate 521 sliding up and down is mounted on the end surface of the guide plate 520 close to the support platform 30, the upper and lower arc-shaped abutment plates 521 are symmetrically arranged and a sealing rubber gasket 522 is mounted on the inner arc surface of the arc-shaped abutment plate 521, a clamping strip 523 is mounted on the end surface of the arc-shaped abutment plate 521 close to the support platform 30, and a pressing groove 524 is provided on the opposite surfaces of the upper and lower clamping strips 523, convex strips 525 are mounted on the outer walls of both ends of the arc-shaped clamping plate 313, and the arc-shaped clamping plate 313 is located between the upper and lower clamping strips 523, and a lifting drive assembly horizontally slidably connected to the arc-shaped abutment plate 521 is provided on the fixing seat 4, and the lifting drive assembly is used to drive the upper and lower arc-shaped abutment plates 521 to move to press and seal the U-shaped tube 7 and the joint tube 510 at the joint.

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

[0053] When the arc-shaped abutment plate 521 moves, the clamping strip 523 is simultaneously driven to move toward the convex strip 525, and the pressing groove 524 is clamped on the two tightly abutted convex strips 525, which not only realizes the upper and lower pressing of the arc-shaped clamping plate 313, but also realizes the axial limitation of the arc-shaped clamping plate 313, and 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 tube 7 and the joint tube 510, which greatly improves the sealing effect and connection stability of the U-shaped tube 7 and the joint tube 510 during the water pressure strength test.

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

[0055] The bidirectional cylinder 543 drives the upper and lower lifting plates 540 to move, and the lifting plates 540 push the arc-shaped abutting plate 521 through the abutting plate 541 to cover and seal the connection between the U-shaped tube 7 and the joint tube 510 .

[0056] See also Figure 6 and Fig. 9 A slot is provided at one end of the arc-shaped abutment plate 521, and an insert block 550 is installed at the other end. The slots and insert blocks 550 on the upper and lower arc-shaped abutment plates 521 are arranged alternately. When the upper and lower arc-shaped abutment plates 521 move to press and cover the tight connection between the U-shaped tube 7 and the joint tube 510 to seal, the slot and the insert block 550 are plugged into and matched, so that the upper and lower arc-shaped abutment plates 521 are relatively locked and limited, further improving the pressing and sealing effect of the tight connection between the U-shaped tube 7 and the joint tube 510.

[0057] See also Figure 1 The support platform 30 is provided with a width adjustment mechanism 6, which is used to simultaneously adjust the distance between the two supporting and conveying feeding 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.

[0058] When testing U-shaped tubes 7 of different widths, the distance between the two supporting 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 pressing groups 52 are adjusted through the width adjustment mechanism 6, so that it is suitable for water pressure strength testing of U-shaped tubes 7 of different widths, thereby expanding the scope of use of the pipeline strength testing device.

[0059] See also Figure 1 , Figure 4 and Figure 6 The width adjustment mechanism 6 includes two sliding grooves 60 opened on the support platform 30 and arranged symmetrically along the length direction thereof, 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 threaded cooperation, one end of the supporting wheel 331 and the conveying wheel 330 is rotatably connected to a connecting tube 62, a connecting strip 63 is installed between the connecting tubes 62 on the same side arranged along the width direction of the base 1, the connecting strip 63 extends to above the sliding seat 310 and the support seat 50, and the top of the sliding seat 310 and the top of the support seat 50 are connected to the connecting strip 63 through a vertical plate.

[0060] One end of the bidirectional screw 61 passes through the support platform 30 and is connected to an external drive motor. The bidirectional screw 61 rotates through its threaded cooperation with the two sliding seats 310 to adjust the distance between the two sliding seats 310. The sliding seat 310 drives the support seat 50 to move through the connecting strip 63, and at the same time drives the conveying wheel 330 and the supporting wheel 331 to move axially along the rotating shaft 32 connected to each other, so as to meet the needs of U-shaped tubes 7 of different widths.

[0061] See also Figure 1-Figure 10 When working, 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, and then the U-shaped tube 7 is conveyed and fed through 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 is tightly pressed against the annular sealing gasket 512 on the joint tube 510, thereby improving the accuracy of the alignment and tight connection between the end of the U-shaped tube 7 and the joint tube 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 hydraulic delivery connection mechanism 5 delivers water into the U-shaped tube 7 for the water pressure strength test, thereby affecting the accuracy of the water pressure strength test of the U-shaped tube 7.

[0063] Then, the sealing pressing group 52 is started, which covers and seals the connection between the U-shaped tube 7 and the water pressure connection group 51, and at the same time presses the clamping group 31 up and down and limits the horizontal section of the U-shaped tube 7 axially, 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 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, which affects the accuracy of the water pressure strength test of the U-shaped tube 7.

[0064] During the water pressure strength test, after the water pressure inside the U-shaped tube 7 reaches the set value, observe whether the U-shaped tube 7 is broken or deformed, so as to determine whether the test result of the U-shaped tube 7 is qualified.

[0065] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as a limitation on the present invention.

[0066] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shell and tube heat exchanger pipeline strength testing device, characterized in that: include: A base (1), the top of the base (1) is provided with three L-shaped platforms (2) arranged along the width direction thereof, the three L-shaped platforms (2) are jointly provided with a fixed feeding mechanism (3) for fixing the horizontal section of the U-shaped tube (7) and driving the U-shaped tube (7) to feed horizontally, a fixed seat (4) is installed at the top of the base (1) near one end in the length direction thereof, and a hydraulic conveying connection mechanism (5) is provided at the top of the fixed seat (4); The fixed feeding mechanism (3) comprises a support platform (30) fixedly connected to the top of the base (1), the support platform (30) being located between the L-shaped platform (2) and the fixed seat (4), the top of the support platform (30) being slidably connected with a clamping group (31) symmetrically arranged along its length direction, the two clamping groups (31) being respectively used to clamp the two horizontal section ends of the U-shaped tube (7), the three L-shaped platforms (2) being rotatably connected with four rotating shafts (32), wherein the two rotating shafts (32) close to the fixed seat (4) are symmetrically arranged up and down, and the other two rotating shafts (32) are arranged along the length direction of the L-shaped platform (2), the four rotating shafts (32) are jointly provided with a supporting conveying feeding group (33) symmetrically arranged along the axis of the rotating shaft (32), a supporting bracket (34) is provided on the side of the L-shaped platform (2) located in the middle away from the fixed seat (4), and a positioning and pushing group (35) is provided on the supporting bracket (34); The hydraulic transmission connection mechanism (5) comprises two support seats (50) connected to the top of the fixing seat (4) and sliding along the length direction thereof, a hydraulic connection group (51) is arranged on the top of the support seat (50), and a sealing pressing group (52) is arranged on the fixing seat (4) for pressing, locking and sealing the connection between the clamping group (31) and the hydraulic connection group (51) when they are matched and connected. The support platform (30) is provided with a width adjustment mechanism (6), which is used to simultaneously adjust the distance between the two supporting conveying feeding groups (33), the distance between the two clamping groups (31), the distance between the two hydraulic connection groups (51) and the distance between the two sealing pressing groups (52).

2. A shell and tube heat exchanger pipe strength testing device according to claim 1, characterized in that: The clamping group (31) comprises two sliding seats (310) which are slidably connected to the support platform (30) and symmetrically arranged in the length direction thereof; the sliding seats (310) are provided with guide grooves (311) which are symmetrically arranged in the length direction thereof; a support plate (312) is slidably connected to the guide groove (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); and an electric slider is installed on the support plate (312) for driving it to slide along the guide groove (311).

3. A shell and tube heat exchanger pipeline strength testing device according to claim 2, characterized in that: The water pressure connection group (51) comprises a joint pipe (510), the joint pipe (510) being fixedly mounted on the support seat (50) via a fixing ring (511) fixedly sleeved thereon, both ends of the joint pipe (510) extending beyond both ends of the fixing ring (511), and an annular sealing gasket (512) being mounted on one end of the joint pipe (510) close to the arc-shaped clamping plate (313).

4. The shell and tube heat exchanger pipeline strength testing device according to claim 3, characterized in that: The sealing pressing group (52) comprises two guide plates (520) symmetrically arranged up and down mounted on the outer wall of the fixing ring (511); an arc-shaped abutment plate (521) sliding up and down is mounted on the end surface of the guide plate (520) close to the support platform (30); the upper and lower arc-shaped abutment plates (521) are symmetrically arranged and a sealing rubber gasket (522) is mounted on the inner arc surface of the arc-shaped abutment plates (521); a clamping strip (523) is mounted on the end surface of the arc-shaped abutment plates (521) close to the support platform (30); The opposing surfaces of the two clamping strips (523) are provided with pressing grooves (524), the outer walls at both ends of the arc clamping plate (313) are provided with convex strips (525), the arc clamping plate (313) is located between the upper and lower clamping strips (523), and the fixed seat (4) is provided with a lifting drive component horizontally slidably connected to the arc-shaped retaining plate (521), and the lifting drive component is used to drive the upper and lower arc-shaped retaining plates (521) to move to press and seal the connection between the U-shaped tube (7) and the joint tube (510).

5. The shell and tube heat exchanger pipeline strength testing device according to claim 2, characterized in that: The supporting conveying and feeding group (33) comprises conveying wheels (330) connected to two rotating shafts (32) arranged up and down by means of spline matching, and supporting wheels (331) connected to the other rotating shafts (32) by means of spline matching, and the middle side walls of the supporting wheels (331) and the conveying wheels (330) are both provided with arc-shaped annular grooves (332) cut circumferentially around their respective axes, and the upper and lower conveying wheels (330) cooperate to convey the horizontal section of the U-shaped tube (7).

6. The shell and tube heat exchanger pipeline strength testing device according to claim 5, characterized in that: The width adjustment mechanism (6) comprises two sliding grooves (60) opened on the support platform (30) and arranged symmetrically along the length direction thereof; 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 threaded engagement; one end of the supporting wheel (331) and the conveying wheel (330) is rotatably connected to a connecting tube (62); a connecting strip (63) is installed between the connecting tubes (62) on the same side arranged along the width direction of the base (1); the connecting strip (63) extends to above the sliding seat (310) and the support seat (50); the top of the sliding seat (310) and the top of the support seat (50) are connected to the connecting strip (63) via a vertical plate.

7. The shell and tube heat exchanger pipeline strength testing device according to claim 4, characterized in that: The lifting drive assembly comprises two upper and lower lifting plates (540); a push plate (541) is installed on the outer ring surface of the arc-shaped push plate (521); the two push plates (541) located on the upper side are slidably connected to the lifting plate (540) located on the upper side; the two push plates (541) located on the lower side are slidably connected to the lifting plate (540) located on the lower side; two brackets (542) symmetrically arranged along the length direction of the fixed seat (4) are installed on the top; two bidirectional cylinders (543) are installed on the two brackets (542); and two telescopic ends of the bidirectional cylinder (543) are respectively connected to the upper and lower lifting plates (540).

8. The shell and tube heat exchanger pipeline strength testing device according to claim 1, characterized in that: The positioning and pushing group (35) comprises a spring groove (350) opened at the top of the support frame (34); a movable seat (351) is slidably connected to the spring groove (350); the movable seat (351) and the spring groove (350) are connected via a pushing spring (352); and two limiting rollers (353) arranged along the length direction of the base (1) are installed on the top of the movable seat (351).

9. The shell and tube heat exchanger pipeline strength testing device according to claim 3, characterized in that: The outer ring surface of the arc-shaped clamping plate (313) is provided with an ear plate (530), and a side of the ear plate (530) close to the fixing seat (4) is provided with an L-shaped clamping rod (531). The outer wall of the fixing ring (511) is provided with two symmetrically arranged arc-shaped seats (532), and the arc-shaped seats (532) are provided with L-shaped clamping grooves (533) corresponding to the L-shaped clamping rods (531) one by one.

10. The shell and tube heat exchanger pipeline strength testing device according to claim 4, characterized in that: A slot is provided at one end of the arc-shaped abutment plate (521), and an insert block (550) is installed at the other end; the slots and insert blocks (550) on the upper and lower arc-shaped abutment plates (521) are arranged alternately.

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