Condenser tube pressure resistance burst test bench and method based on heat exchanger production

Abstract

This invention relates to the technical field of condenser tube pressure resistance testing equipment, specifically disclosing a condenser tube pressure resistance burst test bench and method based on heat exchanger production. It includes a first partition and a second partition fixedly installed on the inner wall of the test bench and arranged vertically in parallel. A test mechanism extending to the top of the second partition and arranged in a rectangular array is provided on the top of the first partition. A cooling mechanism is provided on the outer wall of the test bench. The test mechanism includes a pressing mechanism located on the top of the second partition. This invention, through the cooperation of the pressing mechanism and the connecting mechanism, facilitates the fixing of condenser tubes of different diameters and can seal the ends of condenser tubes of different diameters, thereby improving the stability of subsequent pressure resistance burst tests. It also allows pressure sensors to enter different positions inside the condenser tube, facilitating the actual control of whether the condenser tube test is qualified, and is convenient for practical testing.

Description

Technical Field

[0001] This invention relates to the technical field of condenser tube pressure resistance testing equipment, specifically to a condenser tube pressure resistance burst test bench and method based on heat exchanger production. Background Technology

[0002] Condenser tubes are an important component of heat exchangers. They have a double-layer tube structure, with the inner tube transporting high-temperature gas and the outer tube dissipating heat through cooling water. The outer tube transfers the heat from the inner tube to the cooling medium, ultimately achieving heat exchange. During the production process, condenser tubes used in heat exchangers need to undergo pressure and burst tests to determine their stability in actual use. In some heat exchangers, titanium alloy is used as the production material for condenser tubes to meet the requirements for corrosion resistance and high-temperature stability.

[0003] CN218036088U discloses an online high-pressure withstand test machine for composite pipes. The problem raised in the background art is the low installation efficiency of composite pipes when conducting pressure tests.

[0004] Based on existing technologies, the following problems exist:

[0005] In existing heat exchanger condenser tubes, pressure burst tests typically involve testing the inner tubes to assess their stability under high-pressure fluid flow. However, due to the large number of inner tubes (often multiple inner tubes are laid within an outer tube to increase the contact area between the fluid and the cooling medium), multiple inner tubes usually need to be placed on a test bench to meet practical testing requirements. Traditional methods for installing and disassembling inner tubes are cumbersome, affecting testing efficiency and making it difficult to monitor pressure at different locations within the inner tubes during the test, thus hindering the accurate assessment of test results. Referring to the aforementioned application documents, the method only involves clamping and fixing the two ends of the tube body, which has certain shortcomings. To address these issues, a pressure burst test bench and method for condenser tubes manufactured for heat exchangers are proposed. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure burst test bench for condenser tubes manufactured based on heat exchangers, comprising a test bench, a control console disposed on the outside of the test bench, and condenser tubes for pressure burst testing. It also includes a first partition and a second partition fixed to the inner wall of the test bench and arranged vertically in parallel. The top of the first partition is provided with a test mechanism extending to the top of the second partition and arranged in a rectangular array. A cooling mechanism is disposed on the outer wall of the test bench. The test mechanism includes:

[0007] A downward pressure mechanism, located at the top of the second partition, applies downward pressure from the middle of the top of the condenser tube to limit its movement. Connecting mechanisms are provided on both sides of the top of the first partition and on both sides of the downward pressure mechanism to connect the two ends of the condenser tube. The downward pressure mechanism includes:

[0008] The cylinder body is fixedly mounted on the top of the second partition plate. The inner side wall of the cylinder body is fitted with a first piston block and a second piston block arranged in parallel vertically, and the first piston block is located at the bottom of the second piston block so that a sealed space is formed between the first piston block and the second piston block.

[0009] The rod is fixedly mounted on the top of the first piston block. A pressure plate is provided on the top of the rod, and a pressure groove is provided at the bottom of the pressure plate.

[0010] Furthermore, the pressing mechanism also includes:

[0011] The first internal threaded tube is sleeved on the top of the cylinder and extends into the cylinder body. The outer wall of the first internal threaded tube is dynamically sealed to the top of the cylinder body and is slidably connected to the inner wall of the cylinder body. The bottom of the first internal threaded tube is fixedly connected to the top of the second piston block.

[0012] The externally threaded tube is threaded to the inner wall of the first internally threaded tube and rotatably connected to the outer wall of the cylinder body. The height of the second piston block is adjusted by the cooperation of the first internally threaded tube and the externally threaded tube. The inner wall of the externally threaded tube is sleeved on the side wall of the rod body.

[0013] Furthermore, the pressing mechanism also includes:

[0014] The frame is fixed to the bottom of the lower pressure plate and has a U-shaped design so that a space for installing the condenser tube is formed between the inner side of the frame and the bottom of the lower pressure plate. The top of the rod is fixedly connected to the bottom of the frame so that the lower pressure plate is driven by the first piston block to apply downward pressure to the condenser tube.

[0015] The connecting pipe is fixedly installed on the outer wall of the cylinder body and located between the first piston block and the second piston block;

[0016] The connecting plates are fixedly installed at the bottom of the first piston block and are symmetrically arranged with respect to the center point of the first piston block. The sides of the connecting plates that are far apart from each other extend out of the cylinder body. The cylinder body has through slots on both sides for the connecting plates to move vertically.

[0017] Furthermore, the top inner wall of the pressure groove is arc-shaped to limit the top of the condenser tube;

[0018] The top of the rod extends to the top of the cylinder, and the bottom of the second piston block has a first through hole for fitting the rod. The inner wall of the first through hole and the side wall of the rod are designed to be dynamically sealed.

[0019] Furthermore, the connecting mechanism includes:

[0020] The second cylinder is fixedly sleeved on the top of the second partition and penetrates the second partition. The top and bottom of the second cylinder are respectively fixedly provided with the third cylinder and the first cylinder. The interiors of the first cylinder, the second cylinder and the third cylinder are all connected. The bottom of the first cylinder is sealed. The second cylinder is designed as an inverted frustum.

[0021] A first limiting component is vertically mounted inside the second cylinder to seal the end of the condenser tube from the inner wall of the condenser tube. A second limiting component is mounted on the top of the third cylinder. The first limiting component includes:

[0022] The limiting post is installed in the second cylinder in a lifting manner and is designed in the shape of a frustum. The bottom of the first cylinder is provided with an adjustment component for adjusting the height of the limiting post.

[0023] Furthermore, the first limiting component also includes:

[0024] The mounting groove is located at the lower end of the inner side of the limiting post. Mounting rods are fixedly installed on the inner walls of both sides of the mounting groove. A spring is installed on the side wall of the mounting rod. A limiting sleeve is fitted on the outer side of the spring. The two ends of the spring are fixedly connected to the side wall of the mounting rod and the inner wall of the limiting sleeve, respectively.

[0025] The torque sensor is fixedly mounted on the side wall of the mounting rod and located on one side of the mainspring. The monitoring end of the torque sensor is connected to the inner wall of the limiting sleeve.

[0026] A pull rope is wound around the outer wall of the limiting sleeve, and one end of the rope is fixedly connected to the outer wall of the limiting sleeve. The top of the limiting post has an inner groove, and a ball is fitted on the inner wall of the inner groove. A pressure sensor is embedded in the side wall of the ball. The other end of the pull rope is fixedly connected to the ball.

[0027] The Tesla valve is fixed inside the limiting post, and both ends of the Tesla valve extend into the inner groove and the mounting groove respectively. The inner side wall of the mounting groove and the top of the limiting sleeve are fixedly provided with a guide plate. The guide plate is inclined. The inner side wall of the guide plate is fixedly provided with a tube extending to the outside of the second cylinder. The tube adopts a telescopic hose design. The pull rope passes through the guide plate and extends along the inside of the Tesla valve to the top of the limiting post.

[0028] The catheter is fixed to the side wall of the limiting post, with one end of the catheter extending into the inner groove and the other end extending out of the second cylinder.

[0029] Furthermore, the second limiting component includes:

[0030] The fourth cylinder is fitted inside the third cylinder. The inner wall of the fourth cylinder is inclined. Sealing rings are fixedly fitted on the upper end of the outer wall, the lower end of the outer wall, and the lower end of the inner wall of the fourth cylinder.

[0031] The sealing ring is fixedly installed on the top of the fourth cylinder. The connection between the sealing ring and the inner wall of the fourth cylinder is smoothly designed. The outer diameter of the sealing ring is larger than the outer diameter of the fourth cylinder. The outer wall of the sealing ring is fixedly connected to the connecting plate.

[0032] Furthermore, the adjustment component includes:

[0033] The second internally threaded tube is slidably disposed on the inner wall of the first cylinder and fixedly connected to the bottom of the limiting post. The inner wall of the second internally threaded tube is threadedly connected to an externally threaded rod. The bottom of the externally threaded rod is rotatably connected to the top of the first partition plate, and the side wall of the externally threaded rod is rotatably connected to the bottom of the first cylinder.

[0034] Furthermore, the cooling mechanism includes:

[0035] The pump body is fixedly installed on the outer wall of the test bench. The water inlet end of the pump body is fixedly provided with a first water supply pipe extending into the test bench, and the water outlet end of the pump body is fixedly provided with a second water supply pipe.

[0036] The third water supply pipe is fixed on the outer wall of the test bench and extends into the test bench. The second and third water supply pipes are connected. The ends of the third and first water supply pipes located inside the test bench are respectively located on both sides of the test bench.

[0037] This invention also provides a method for using a pressure burst test bench for condenser tubes manufactured based on heat exchangers. The method, employing the aforementioned pressure burst test bench for condenser tubes manufactured based on heat exchangers, includes the following steps:

[0038] S1: The heat exchanger that needs to withstand pressure burst is installed in the test bench using condenser tubes through the test mechanism;

[0039] S2: After the condenser tube is installed, a pressure burst test is conducted on the condenser tube through the cooperation of the cooling mechanism and the testing mechanism.

[0040] This invention provides a pressure burst test bench and method for condenser tubes manufactured based on heat exchangers. Compared with the prior art, it has the following advantages:

[0041] 1. This invention, through the cooperation of a pressing mechanism and a connecting mechanism, facilitates the fixing of condenser tubes of different diameters and can seal the ends of condenser tubes of different diameters, thereby improving the stability of subsequent pressure burst tests. It also allows the pressure sensor to enter different positions inside the condenser tube, making it easier to determine whether the condenser tube is qualified for the test and facilitating its use in actual tests.

[0042] 2. The present invention forms a sealed space in the cylinder by means of the first piston block and the second piston block, and applies downward pressure to the condenser tube by means of the pressure of the fluid itself, thereby making it easier to fix the condenser tube according to the fluid pressure required for actual test, improving the stability of fixation, and facilitating actual operation.

[0043] By adjusting the size of the sealed space between the first piston block and the second piston block, the smaller the volume of the sealed space, the greater the downward pressure exerted by the lower pressure plate on the condenser tube under the rated fluid pressure, thereby improving the stability of the fixed condenser tube and expanding its applicability.

[0044] 3. The present invention uses the cooperation of the second cylinder and the limiting column to limit the condenser tubes of different diameters from the outer and inner walls of the condenser tube. The limiting column and the second cylinder limit the condenser tube from the inner and outer walls of the condenser tube respectively. In addition, the second limiting component limits the condenser tube from different heights, thereby improving the stability of the condenser tube limiting and thus improving the stability of subsequent tests.

[0045] 4. The present invention uses the second cylinder and the limiting post to seal condensers of different diameters from the outer and inner walls of the condenser tube, and to prevent fluid leakage during the test. In addition, it can be used with the adjustment component to make it easy to adjust the height of the limiting post, and further facilitate the use of condensers of different diameters.

[0046] 5. This invention uses fluid to move the sphere along the inner wall of the condenser tube, allowing the sphere to enter different positions within the condenser tube. This facilitates actual monitoring of the fluid pressure inside the condenser tube, and also facilitates the detection of pressure at burst and hole locations. It allows for practical understanding of test results. Furthermore, in conjunction with a torque sensor, it facilitates determining the approximate position of the sphere, thereby facilitating the identification of burst locations and enabling the handling of faulty condenser tubes after the test. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0048] Figure 2 This is a longitudinal sectional view of the test bench of the present invention, shown on the left side.

[0049] Figure 3 This is a schematic diagram of the right side of the longitudinal section of the test bench of the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of the first partition, the second partition, the condenser tube, and the experimental mechanism of the present invention;

[0051] Figure 5 This is a schematic diagram of the experimental mechanism and condenser tube structure of the present invention;

[0052] Figure 6 This is a longitudinal sectional view of the lower pressure plate, frame, first cylinder, second cylinder, and third cylinder of the present invention.

[0053] Figure 7 This is a schematic diagram of the condenser tube and connecting mechanism of the present invention;

[0054] Figure 8 This is a longitudinal sectional view of the first cylinder, second cylinder, and third cylinder of the present invention;

[0055] Figure 9 This is a schematic diagram of the second limiting component, the first limiting component, and the condenser tube of the present invention;

[0056] Figure 10 This is a longitudinal sectional view of the sealing ring, fourth cylinder, second cylinder, and third cylinder of the present invention.

[0057] Figure 11 This is a longitudinal sectional view of the third cylinder, the second cylinder, the condenser tube, and the limiting column of the present invention.

[0058] Figure 12 This is a schematic diagram of the mounting rod, limiting sleeve, spring, torque sensor, pull rope, ball, and pressure sensor of the present invention.

[0059] Figure 13 For the present invention Figure 12 A magnified structural diagram of A in the middle;

[0060] Figure 14 This is a schematic diagram of the pressing mechanism of the present invention;

[0061] Figure 15 This is a schematic diagram of the lower pressure plate, lower pressure groove, and frame structure of the present invention;

[0062] Figure 16 This is a longitudinal sectional view of the second internally threaded tube and the externally threaded tube of the present invention.

[0063] The reference numerals in the above figures are as follows: 1. Test bench; 2. Control console; 3. Cooling mechanism; 4. Second partition; 5. First partition; 6. Test mechanism; 7. Condenser tube;

[0064] 31. Second water supply pipe; 32. Third water supply pipe; 33. Pump body; 34. First water supply pipe;

[0065] 61. Pressing mechanism; 62. Connecting mechanism;

[0066] 611. Lower pressure plate; 612. Frame; 613. Cylinder; 614. Rod; 615. First internal threaded pipe; 616. Connecting pipe; 617. Connecting plate; 618. First piston block; 619. Second piston block; 6191. Lower pressure groove; 6192. External threaded pipe;

[0067] 621. Third cylinder; 622. Second cylinder; 623. First cylinder; 624. Second limiting assembly; 625. First limiting assembly; 626. Adjusting assembly;

[0068] 6241. Sealing ring; 6242. Fourth cylinder;

[0069] 6250, Spring; 6251, Limiting Post; 6252, Tube Body; 6253, Flow Deflector; 6254, Ball; 6255, Tesla Valve; 6256, Mounting Groove; 6257, Mounting Rod; 6258, Limiting Sleeve; 6259, Torque Sensor; 62591, Pull Rope; 62592, Pressure Sensor; 62593, Conduit;

[0070] 6261. Second internal threaded tube; 6262. External threaded rod. Detailed Implementation

[0071] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0072] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A pressure burst test bench for condenser tubes based on heat exchanger production includes a test bench 1, a control console 2 located outside the test bench 1, and condenser tubes 7 for pressure burst testing. The condenser tubes 7 of the heat exchanger to be subjected to pressure burst testing are placed inside the test bench 1, and the control console 2 facilitates the monitoring of parameters such as water pressure during the test for practical use. The condenser tubes 7 are U-shaped condenser tubes, which is existing technology and will not be described in detail here.

[0073] It also includes a first partition 5 and a second partition 4 fixedly installed on the inner side wall of the test bench 1 and arranged in parallel vertically, and a test mechanism 6 extending to the top of the second partition 4 and arranged in a rectangular array is provided on the top of the first partition 5, and a cooling mechanism 3 is provided on the outer wall of the test bench 1.

[0074] Please see Figure 5 and Figure 6Test facility 6 includes:

[0075] A pressing mechanism 61 is provided on the top of the second partition 4 to apply downward pressure to the condenser tube 7 from the middle of the top to limit the condenser tube 7. A connecting mechanism 62 is provided on the top of the first partition 5 and on both sides of the pressing mechanism 61 to connect the two ends of the condenser tube 7.

[0076] Please see Figure 14 , Figure 15 and Figure 16 The pressing mechanism 61 includes:

[0077] The cylinder body 613 is fixedly mounted on the top of the second partition plate 4. The inner side wall of the cylinder body 613 is fitted with a first piston block 618 and a second piston block 619 arranged in parallel from top to bottom, and the first piston block 618 is located at the bottom of the second piston block 619, so that a sealed space is formed between the first piston block 618 and the second piston block 619.

[0078] The rod body 614 is fixedly mounted on the top of the first piston block 618. A lower pressure plate 611 is provided on the top of the rod body 614, and a lower pressure groove 6191 is provided at the bottom of the lower pressure plate 611.

[0079] The pressing mechanism 61 further includes:

[0080] The first internal threaded tube 615 is sleeved on the top of the cylinder body 613 and extends into the cylinder body 613. The outer wall of the first internal threaded tube 615 is dynamically sealed to the top of the cylinder body 613 and is slidably connected to the inner wall of the cylinder body 613. The bottom of the first internal threaded tube 615 is fixedly connected to the top of the second piston block 619.

[0081] The external threaded tube 6192 is threaded to the inner wall of the first internal threaded tube 615 and rotatably connected to the outer wall of the cylinder 613, so that the height of the second piston block 619 can be adjusted by the cooperation of the first internal threaded tube 615 and the external threaded tube 6192. The inner wall of the external threaded tube 6192 is sleeved on the side wall of the rod 614.

[0082] The pressing mechanism 61 further includes:

[0083] The frame 612 is fixedly installed at the bottom of the lower pressure plate 611 and has a U-shaped design so that a space for installing the condenser pipe 7 is formed between the inner side of the frame 612 and the bottom of the lower pressure plate 611. The top of the rod 614 is fixedly connected to the bottom of the frame 612 so that the lower pressure plate 611 is driven by the first piston block 618 to apply downward pressure to the condenser pipe 7.

[0084] The connecting pipe 616 is fixedly disposed on the outer wall of the cylinder body 613 and is located between the first piston block 618 and the second piston block 619;

[0085] The connecting plate 617 is fixedly disposed at the bottom of the first piston block 618 and is symmetrically arranged with respect to the center point of the first piston block 618. The side of the connecting plate 617 that is far apart from each other extends to the outside of the cylinder body 613. The cylinder body 613 has through slots on both sides for the connecting plate 617 to move vertically.

[0086] In practice, the condenser tube 7 to be tested is placed in the test bench 1 along the space between the frame 612 and the lower pressure plate 611. At this time, the top of the condenser tube 7 is located at the bottom of the lower pressure plate 611, and the two sides of the condenser tube 7 are located at the top of the connecting mechanism 62 and extend into the second cylinder 622. Then, the lower pressure mechanism 61 applies downward pressure to the condenser tube 7 from the top, thereby fixing the condenser tube 7 and improving the stability of the condenser tube 7 in subsequent tests.

[0087] After the two ends of the condenser tube 7 are positioned inside the second cylinder 622, the second cylinder 622, being an inverted frustum shape, supports the bottom of the condenser tube 7. Then, a fluid delivery pipe is connected via a connector, allowing fluid to flow into the cylinder 613 and into the sealed space between the first piston block 618 and the second piston block 619. Because the second piston block 619 is a stable structure, the water pressure in the sealed space increases as fluid continuously flows in, continuously compressing the first piston block 618, thereby driving the rod 614... The frame 612 and the lower pressure plate 611 move downward to apply downward pressure to the condenser tube 7 from the top, so as to cooperate with the second cylinder 622 to fix the condenser tube 7 and improve the stability of the condenser tube 7 test. The first piston block 618 and the second piston block 619 form a closed space in the cylinder 613, and the pressure of the fluid itself drives the lower pressure plate 611 to apply downward pressure to the condenser tube 7, so as to facilitate the fixing of the condenser tube 7 according to the fluid pressure required for the actual test, improve the stability of the fixing, and facilitate actual operation.

[0088] To broaden its applicability and facilitate the use of condenser tubes 7 under different test pressures, the external threaded tube 6192 drives the first internal threaded tube 615 to move vertically, thereby driving the second piston block 619 to move vertically. This adjusts the size of the sealed space between the first piston block 618 and the second piston block 619. The smaller the volume of the sealed space, the greater the squeezing force applied to the first piston block 618 under the rated fluid pressure. This, in turn, increases the downward pressure applied by the lower pressure plate 611 to the condenser tube 7, improving the stability of fixing the condenser tube 7 and facilitating practical operation.

[0089] As the first piston block 618 moves downward, it drives the connecting plate 617 to move downward, thereby enabling the connecting plate 617 to cooperate with the second limiting component 624 to seal the top of the third cylinder 621 and limit the condenser tube 7, thus improving the stability of the condenser tube 7.

[0090] The inner sidewall of the cylinder 613 is provided with a first sliding groove arranged in a ring array. The first sliding groove is filled with a first slider. The first slider is fixedly connected to the outer wall of the first internal thread tube 615, thereby limiting the first internal thread tube 615 so that the external thread tube 6192 drives the first internal thread tube 615 to move vertically.

[0091] The inner top wall of the pressure groove 6191 is arc-shaped to limit the top of the condenser tube 7. By making the inner top wall of the pressure groove 6191 arc-shaped and fitting it to the outer surface of the condenser tube 7, it is easy to squeeze the condenser tube 7.

[0092] The top of the rod 614 extends to the top of the cylinder 613, and the bottom of the second piston block 619 is provided with a first through hole for fitting the rod 614. The inner wall of the first through hole and the side wall of the rod 614 are designed to be dynamically sealed.

[0093] Example 2: Please refer to Figure 7 and Figure 8 The technical difference between this embodiment and Embodiment 1 is that the connecting mechanism 62 includes:

[0094] The second cylinder 622 is fixedly sleeved on the top of the second partition 4 and passes through the second partition 4. The top and bottom of the second cylinder 622 are respectively fixedly provided with the third cylinder 621 and the first cylinder 623. The interiors of the first cylinder 623, the second cylinder 622 and the third cylinder 621 are all connected. The bottom of the first cylinder 623 is sealed. The second cylinder 622 is designed as an inverted frustum.

[0095] The first limiting component 625 is vertically disposed inside the second cylinder 622 to seal the end of the condenser pipe 7 from the inner wall of the condenser pipe 7, and the top of the third cylinder 621 is provided with the second limiting component 624.

[0096] In practical implementation, by designing the second cylinder 622 as an inverted frustum, after the end of the condenser tube 7 is inserted into the second cylinder 622 along the third cylinder 621, the end of the condenser tube 7 will be supported by the inner wall of the second cylinder 622, thereby supporting the bottom of both ends of the condenser tube 7, and cooperating with the pressing mechanism 61 to fix the condenser tube 7.

[0097] By designing the second cylinder 622 into an inverted frustum shape, it is convenient to support both ends of the condenser tube 7. Condenser tubes 7 of different diameters can be supported during vertical movement within the second cylinder 622, improving applicability. In conjunction with the first limiting component 625, the limiting post 6251 seals the end of the condenser tube 7 and facilitates the delivery of fluid into the condenser tube 7 for use in pressure burst tests. In addition, it facilitates the insertion of the pressure sensor 62592 into different positions within the condenser tube 7, thereby facilitating the actual monitoring of the test results of the condenser tube 7. The first limiting component 625 and the second limiting component 624 work together to improve the stability of fixing the condenser tube 7 and the stability of the sealing.

[0098] Please see Figure 9 , Figure 11 , Figure 12 and Figure 13 The first limiting component 625 includes:

[0099] The limiting post 6251 is vertically mounted inside the second cylinder 622 and is designed in the shape of a frustum. The bottom of the first cylinder 623 is provided with an adjustment component 626 for adjusting the height of the limiting post 6251.

[0100] The first limiting component 625 further includes:

[0101] Mounting groove 6256 is opened at the lower end of the inner side of limiting post 6251. Mounting rod 6257 is fixedly provided on both inner walls of mounting groove 6256. Spring 6250 is provided on the side wall of mounting rod 6257. Limiting sleeve 6258 is sleeved on the outer side of spring 6250. The two ends of spring 6250 are fixedly connected to the side wall of mounting rod 6257 and the inner wall of limiting sleeve 6258, respectively.

[0102] The torque sensor 6259 is fixedly mounted on the side wall of the mounting rod 6257 and located on one side of the spring 6250. The monitoring end of the torque sensor 6259 is connected to the inner wall of the limiting sleeve 6258.

[0103] A pull rope 62591 is wound around the outer wall of the limiting sleeve 6258, and one end of the rope is fixedly connected to the outer wall of the limiting sleeve 6258. The top of the limiting post 6251 has an inner groove, and a ball 6254 is fitted on the inner wall of the inner groove. A pressure sensor 62592 is embedded in the side wall of the ball 6254. The other end of the pull rope 62591 is fixedly connected to the ball 6254.

[0104] Tesla valve 6255 is fixedly installed inside limit post 6251, and both ends of Tesla valve 6255 extend into inner groove and mounting groove 6256 respectively. A guide plate 6253 is fixedly installed on the inner side wall of mounting groove 6256 and at the top of limit sleeve 6258. The guide plate 6253 is inclined. A tube 6252 extending to the outside of second cylinder 622 is fixedly installed on the inner side wall of guide plate 6253. The tube 6252 adopts a telescopic hose design. The pull rope 62591 passes through guide plate 6253 and extends along the inside of Tesla valve 6255 to the top of limit post 6251.

[0105] The conduit 62593 is fixedly disposed on the side wall of the limiting post 6251, with one end of the conduit 62593 extending into the inner groove and the other end of the conduit 62593 extending out of the second cylinder 622.

[0106] In practical implementation, after the end of the condenser tube 7 is inserted into the second cylinder 622 and abuts against the inner wall of the second cylinder 622, the height of the limiting post 6251 is adjusted by the adjusting component 626. Since the limiting post 6251 is frustoconical in shape, as the limiting post 6251 moves upward, it inserts into the condenser tube 7 and abuts against the inner wall of the condenser tube 7, thereby sealing the condenser tube 7 and preventing fluid leakage during the test. Furthermore, the limiting post 6251 and the second cylinder 622 respectively limit the condenser tube 7 from the inner and outer walls, improving the stability of the condenser tube 7's positioning. In conjunction with the pressing mechanism 61, the condenser tube 7 is fixed. After fixing, the flow... Fluid is transported through conduit 62593 and enters condenser tube 7 through conduit 62593 and inner groove. During the process of fluid entering condenser tube 7, it drives ball 6254 to move along the inner wall of condenser tube 7, so that pressure sensor 62592 can perform pressure test at different positions in condenser tube 7. When condenser tube 7 leaks or bursts, the fluid in condenser tube 7 leaks out, and the information monitored by pressure sensor 62592 is abnormal, which facilitates actual judgment. When the outer wall of condenser tube 7 has a hole and causes fluid to leak out, the fluid in condenser tube 7 flows to the hole, and ball 6254 moves with the water flow to the hole, which facilitates monitoring the pressure in condenser tube 7 and the magnitude of the pressure at the leak point.

[0107] The ball 6254 is pulled by the rope 62591 to allow it to enter different positions inside the condenser tube 7. This facilitates the actual monitoring of the fluid pressure inside the condenser tube 7 and allows for the detection of pressure at the location of any burst or hole in the condenser tube 7. This makes it easier to understand the test results. In conjunction with the torque sensor 6259, the movement of the ball 6254 by the fluid generates a torque change that overcomes the spring 6250, making it easier to determine the approximate position of the ball 6254. This facilitates the determination of the burst location and the handling of any faulty condenser tube 7 after the test.

[0108] The flow direction of fluid entering the mounting groove 6256 is restricted by the Tesla valve 6255, thereby improving the stability of fluid entering the condenser 7 and preventing fluid from entering the mounting groove 6256, thus avoiding affecting actual test use. Due to the structural characteristics of the Tesla valve 6255 itself, the fluid flows in the forward direction of the Tesla valve 6255, that is, when it flows from the bottom to the top of the Tesla valve 6255 in this application, it is approximately a vertical straight line, thereby ensuring the normal traction of the pull rope 62591 and restricting the reverse flow of the fluid. Some of the fluid that enters the mounting groove 6256 along the Tesla valve 6255 is discharged through the guide plate 6253 and the pipe body 6252.

[0109] Please see Figure 8 and Figure 9 The adjustment component 626 includes:

[0110] The second internally threaded tube 6261 is slidably disposed on the inner wall of the first cylinder 623 and fixedly connected to the bottom of the limiting post 6251. The inner wall of the second internally threaded tube 6261 is threadedly connected to an externally threaded rod 6262. The bottom of the externally threaded rod 6262 is rotatably connected to the top of the first partition 5, and the side wall of the externally threaded rod 6262 is rotatably connected to the bottom of the first cylinder 623.

[0111] In practical implementation, the external threaded rod 6262 drives the second internal threaded tube 6261 to move vertically, thereby adjusting the height of the limiting post 6251. This ensures that the limiting post 6251 can seal the end of the condenser tube 7 at different heights when the condenser tube 7 is inserted into the second cylinder 622, making it suitable for use with condenser tubes 7 of different diameters.

[0112] Please see Figure 9 and Figure 10 The second limiting component 624 includes:

[0113] The fourth cylinder 6242 is fitted onto the inner wall of the third cylinder 621. The inner wall of the fourth cylinder 6242 is designed to be inclined. Sealing rings are fixedly fitted onto the upper end of the outer wall, the lower end of the outer wall, and the lower end of the inner wall of the fourth cylinder 6242.

[0114] The sealing ring 6241 is fixedly installed on the top of the fourth cylinder 6242. The connection between the sealing ring 6241 and the inner wall of the fourth cylinder 6242 is smoothly designed. The outer diameter of the sealing ring 6241 is larger than the outer diameter of the fourth cylinder 6242. The outer wall of the sealing ring 6241 is fixedly connected to the connecting plate 617.

[0115] In practice, when the first piston block 618 moves downward, it drives the sealing ring 6241 and the fourth cylinder 6242 to move downward, thereby sealing between the third cylinder 621, the second cylinder 622 and the outer wall of the condenser tube 7, thus limiting the condenser tube 7 at multiple points along the height direction of the condenser tube 7 and improving stability.

[0116] Please see Figure 2 and Figure 3 The cooling mechanism 3 includes:

[0117] The pump body 33 is fixedly installed on the outer wall of the test bench 1. The water inlet end of the pump body 33 is fixedly provided with a first water supply pipe 34 extending into the test bench 1, and the drain end of the pump body 33 is fixedly provided with a second water supply pipe 31.

[0118] The third water supply pipe 32 is fixedly installed on the outer wall of the test bench 1 and extends into the test bench 1. The second water supply pipe 31 and the third water supply pipe 32 are connected. The ends of the third water supply pipe 32 and the first water supply pipe 34 located inside the test bench 1 are respectively located on both sides of the interior of the test bench 1.

[0119] In practice, the cooling medium is connected to the external cooling medium pipe through the third water supply pipe 32, so that the cooling medium enters the test bench 1. After the cooling medium enters the test bench 1, the third water supply pipe 32 is closed and the second water supply pipe 31 is opened. The pump body 33 is started, so that the cooling medium circulates in the third water supply pipe 32, the second water supply pipe 31, the first water supply pipe 34, the pump body 33 and the test bench 1, thereby conducting a pressure burst test on the condenser tube 7.

[0120] Both the external threaded rod 6262 and the external threaded tube 6192 of the present invention can be connected by gears and chains for transmission, so as to facilitate the synchronous adjustment of multiple test mechanisms 6 arranged at intervals. This is prior art and is not shown in the figure, so it will not be described in detail here.

[0121] This invention also provides a method for using a pressure burst test bench 1 for condenser tubes 7 manufactured based on heat exchangers. The method includes the following steps:

[0122] S1: Open the top cover of the test bench 1, place the heat exchanger condenser tube 7 to be tested in the test bench 1 along the space between the frame 612 and the lower pressure plate 611. After placement, the two ends of the heat exchanger are respectively located at the top of the connecting mechanism 62 on both sides of the cylinder 613, so as to connect the two ends of the condenser tube 7 through the connecting mechanism 62 and seal the two ends of the condenser tube 7 to prevent fluid leakage after fluid is supplied to the condenser tube 7 through the conduit 62593, thereby facilitating the subsequent pressure burst test. After the two ends of the condenser tube 7 are connected, the lower pressure mechanism 61 applies downward pressure from the top of the condenser tube 7. Through the cooperation of the lower pressure mechanism 61 and the connecting mechanism 62 of the test mechanism 6, the heat exchanger condenser tube 7 to be tested for pressure burst is installed in the test bench 1.

[0123] S2: After the condenser tube 7 is installed, the cover is closed. The cooling mechanism 3 and the test mechanism 6 work together to supply fluid into the condenser tube 7 while circulating the cooling medium in the test bench 1, thereby simulating the actual working environment of the condenser tube 7 and conducting a pressure resistance and burst test on the condenser tube 7. During the test, if the condenser tube 7 ruptures or bursts, the information monitored by the pressure sensor 62592 will change. The control console 2 can be used to monitor the abnormal situation and to monitor the pressure of the supplied fluid and the circulating cooling medium, which is convenient for actual test use.

[0124] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0125] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0126] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure burst test device for condenser tubes manufactured based on heat exchangers, comprising a test bench, a control console disposed outside the test bench, and condenser tubes for pressure burst testing, wherein the condenser tubes are U-shaped, characterized in that, It also includes a first partition and a second partition fixedly installed on the inner wall of the test bench and arranged vertically in parallel, with the second partition located above the first partition. A test mechanism extending to the top of the second partition and arranged in a rectangular array is provided on the top of the first partition. A cooling mechanism is provided on the outer wall of the test bench, and a cooling medium can circulate within the cooling mechanism and the test bench. The test mechanism includes: A downward pressure mechanism, located at the top of the second partition, applies downward pressure from the middle of the top of the condenser tube to limit its movement. Connecting mechanisms are provided at the top of the first partition and on both sides of the downward pressure mechanism to seal and connect the two ends of the condenser tube. The connecting mechanisms include: The second cylinder is fixedly sleeved on the top of the second partition and penetrates the second partition. The top and bottom of the second cylinder are respectively fixedly provided with the third cylinder and the first cylinder. The interiors of the first cylinder, the second cylinder and the third cylinder are all connected. The bottom of the first cylinder is sealed. The second cylinder is designed as an inverted frustum. A first limiting component is vertically mounted inside the second cylinder to seal the end of the condenser tube from the inner wall of the condenser tube. A second limiting component is mounted on the top of the third cylinder. The first limiting component includes: The limiting column is installed in the second cylinder in a lifting manner and is designed in the shape of a frustum. The mounting groove is located at the lower end of the inner side of the limiting post. Mounting rods are fixedly installed on the inner walls of both sides of the mounting groove. A spring is installed on the side wall of the mounting rod. A limiting sleeve is fitted on the outer side of the spring. The two ends of the spring are fixedly connected to the side wall of the mounting rod and the inner wall of the limiting sleeve, respectively. The torque sensor is fixedly mounted on the side wall of the mounting rod and located on one side of the mainspring. The monitoring end of the torque sensor is connected to the inner wall of the limiting sleeve. A pull rope is wound around the outer wall of the limiting sleeve, and one end of the rope is fixedly connected to the outer wall of the limiting sleeve. The top of the limiting post has an inner groove, and a ball is fitted on the inner wall of the inner groove. A pressure sensor is embedded in the side wall of the ball. The other end of the pull rope is fixedly connected to the ball. The Tesla valve is fixed inside the limiting post, and both ends of the Tesla valve extend into the inner groove and the mounting groove, respectively. The conduit is fixed to the side wall of the limiting post, with one end of the conduit extending into the inner groove and the other end extending out of the second cylinder. During the test, fluid is transported through the conduit and enters the condenser tube through the conduit and the inner groove.

2. The pressure burst resistance test device for condenser tubes based on heat exchanger manufacturing according to claim 1, characterized in that, The pressing mechanism includes: The cylinder body is fixedly mounted on the top of the second partition plate. The inner side wall of the cylinder body is fitted with a first piston block and a second piston block arranged in parallel vertically, and the first piston block is located at the bottom of the second piston block so that a sealed space is formed between the first piston block and the second piston block. The rod is fixedly mounted on the top of the first piston block. A pressure plate is provided on the top of the rod, and a pressure groove is provided at the bottom of the pressure plate. The first internal threaded tube is sleeved on the top of the cylinder and extends into the cylinder body. The outer wall of the first internal threaded tube is dynamically sealed to the top of the cylinder body and is slidably connected to the inner wall of the cylinder body. The bottom of the first internal threaded tube is fixedly connected to the top of the second piston block. The externally threaded tube is threaded to the inner wall of the first internally threaded tube and rotatably connected to the outer wall of the cylinder body. The height of the second piston block is adjusted by the cooperation of the first internally threaded tube and the externally threaded tube. The inner wall of the externally threaded tube is sleeved on the side wall of the rod body.

3. The pressure burst resistance test device for condenser tubes based on heat exchanger manufacturing according to claim 2, characterized in that, The pressing mechanism also includes: The frame is fixed to the bottom of the lower pressure plate and has a U-shaped design so that a space for installing the condenser tube is formed between the inner side of the frame and the bottom of the lower pressure plate. The top of the rod is fixedly connected to the bottom of the frame so that the lower pressure plate is driven by the first piston block to apply downward pressure to the condenser tube. The connecting pipe is fixed to the outer wall of the cylinder and located between the first piston block and the second piston block. Fluid flows into the sealed space formed by the first piston block and the second piston block through the connecting pipe. As the fluid flows in continuously, the water pressure in the sealed space increases and continuously squeezes the first piston block, thereby driving the rod, frame and lower pressure plate to move downward to apply downward pressure to the condenser tube from the top. It also cooperates with the second cylinder to fix the condenser tube. The connecting plates are fixedly installed at the bottom of the first piston block and are arranged symmetrically with the center point of the first piston block as the center. The side of the connecting plates that is far apart from each other extends out of the cylinder body. The cylinder body has through slots on both sides for the connecting plates to move vertically.

4. The pressure burst resistance test device for condenser tubes based on heat exchanger manufacturing according to claim 3, characterized in that, The top inner wall of the pressure groove is arc-shaped to limit the top of the condenser tube; The top of the rod extends to the top of the cylinder, and the second piston block has a first through hole for fitting the rod. The inner wall of the first through hole and the side wall of the rod are designed to be dynamically sealed.

5. The pressure burst resistance test device for condenser tubes based on heat exchanger manufacturing according to claim 3, characterized in that, A guide plate is fixedly provided on the inner side wall of the mounting groove and at the top of the limiting sleeve. The guide plate is designed to be inclined. A tube extending to the outside of the second cylinder is fixedly provided on the inner side wall of the guide plate. The tube adopts a telescopic flexible hose design. The pull rope passes through the guide plate and extends along the inside of the Tesla valve to the top of the limiting post.

6. The pressure burst resistance test device for condenser tubes based on heat exchanger production according to claim 5, characterized in that, The second limiting component includes: The fourth cylinder is fitted inside the third cylinder. The inner wall of the fourth cylinder is inclined. Sealing rings are fixedly fitted on the upper end of the outer wall, the lower end of the outer wall, and the lower end of the inner wall of the fourth cylinder. A sealing ring is fixedly installed on the top of the fourth cylinder. The connection between the sealing ring and the inner wall of the fourth cylinder is smoothly set. The outer diameter of the sealing ring is larger than the outer diameter of the fourth cylinder. The outer wall of the sealing ring is fixedly connected to the connecting plate.

7. The pressure burst resistance test device for condenser tubes based on heat exchanger production according to claim 6, characterized in that, The bottom of the first cylinder is provided with an adjustment assembly for adjusting the height of the limiting post, the adjustment assembly comprising: The second internally threaded tube is slidably disposed on the inner wall of the first cylinder and fixedly connected to the bottom of the limiting post. The inner wall of the second internally threaded tube is threadedly connected to an externally threaded rod. The bottom of the externally threaded rod is rotatably connected to the top of the first partition plate, and the side wall of the externally threaded rod is rotatably connected to the bottom of the first cylinder.

8. The pressure burst resistance test device for condenser tubes based on heat exchanger manufacturing according to claim 1, characterized in that, The cooling mechanism includes: The pump body is fixedly installed on the outer wall of the test bench. The water inlet end of the pump body is fixedly provided with a first water supply pipe extending into the test bench, and the water outlet end of the pump body is fixedly provided with a second water supply pipe. The third water supply pipe is fixed on the outer wall of the test bench and extends into the test bench. The second and third water supply pipes are connected. The ends of the third and first water supply pipes located inside the test bench are respectively located on both sides of the test bench.

9. A method for using a pressure burst test device for condenser tubes manufactured based on heat exchangers, characterized in that, The method using the condenser tube pressure burst test apparatus based on heat exchanger production according to any one of claims 1-8 includes the following steps: S1: The heat exchanger that needs to withstand pressure burst is installed in the test bench using condenser tubes through the test mechanism; S2: After the condenser tube is installed, a pressure burst test is conducted on the condenser tube through the cooperation of the cooling mechanism and the testing mechanism. Specifically, through the cooperation of the cooling mechanism and the testing mechanism, while the conduit delivers fluid into the condenser tube, the cooling medium circulates within the test bench, thereby simulating the actual working environment of the condenser tube. During the process of the fluid entering the condenser tube, it drives the ball to move along the inner wall of the condenser tube, so that the pressure sensor can perform pressure tests at different positions inside the condenser tube. When the condenser tube leaks or bursts, the fluid inside the condenser tube leaks out, and the information monitored by the pressure sensor is abnormal. When a hole appears on the outer wall of the condenser tube, causing fluid to leak out, the fluid inside the condenser tube flows towards the hole, and the ball moves with the water flow towards the hole to determine the pressure at the leak point. By pulling the ball with a rope, combined with the cooperation of the torque sensor, the fluid drives the ball to move, changing the torque of the spring to determine the position of the ball, thereby determining the burst location.

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