Plate heat exchanger pressure detection device

Abstract

The invention discloses a plate heat exchanger pressure detection device, and belongs to the technical field of plate heat exchanger pressure detection.The plate heat exchanger pressure detection device comprises a detection table, a plate heat exchanger body, a positioning mechanism and a detection mechanism, the plate heat exchanger body is arranged at the top of the detection table, and the positioning mechanism is used for positioning the plate heat exchanger body; the detection mechanism comprises a detection box, a conduction mechanism and a driving mechanism; a simulation mechanism is arranged in the detection box and is used for simulating the flowing condition of fluid to realize detection. According to the invention, rapid positioning of the plate heat exchanger can be realized through the detection bench, the baffle plate and the positioning mechanism, and conduction of the detection device and the heat exchanger can be conveniently realized through the conduction mechanism and the driving mechanism, so that the detection preparation process is simplified; the actual operation conditions of the heat exchanger under different pressure conditions can be automatically simulated through the arranged simulation mechanism, automatic detection is achieved, and detection comprehensiveness and accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of plate heat exchanger pressure detection, and in particular to a plate heat exchanger pressure detection device. Background Art

[0002] Plate heat exchanger is a heat exchange device made of multiple metal plates connected by gaskets. It is widely used in various heat exchange systems. Due to its compact structure and high heat transfer efficiency, it has become an important equipment in many industrial processes.

[0003] The patent document with publication number CN204855119U discloses a pressure detection device for a plate heat exchanger, including a pressure detection unit and a control device. The pressure detection unit includes a pressure device, a connecting pipe for connecting the pressure device to the plate heat exchanger, and a first solenoid valve for venting the plate heat exchanger. The pressure device is connected to the control device, and a second solenoid valve is provided on the connecting pipe. The first solenoid valve and the second solenoid valve are connected to the control device. The design adopts a pressure device and a control device, and the gas in the plate heat exchanger is automatically discharged through the first solenoid valve, which is automatically closed after exhausting. The connecting pipe is automatically filled with water and drained through the second solenoid valve, so as to realize fully automatic pressure detection of the plate heat exchanger and achieve the purpose of convenience and speed.

[0004] The above technical solution can only achieve the detection effect under constant pressure conditions. It is inconvenient to adjust the test pressure and the test temperature, which makes it difficult to achieve detection under different conditions, so that the detection results are limited. Therefore, we propose a plate heat exchanger pressure detection device to solve this problem. Summary of the invention

[0005] The object of the present invention is to provide a pressure detection device for a plate heat exchanger to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A plate heat exchanger pressure detection device, comprising: a detection platform, a plate heat exchanger body, a positioning mechanism and a detection mechanism, wherein the plate heat exchanger body is arranged on the top of the detection platform, the positioning mechanism is used to position the plate heat exchanger body, the detection mechanism comprises: a detection box, a conduction mechanism and a driving mechanism, the top of the detection box is connected with a pressure gauge, the conduction mechanism is used to achieve conduction between the detection box and the plate heat exchanger body, and the driving mechanism is used to control the horizontal movement of the detection box; A simulation mechanism is provided in the detection box, and the simulation mechanism is used to simulate the fluid flow condition to realize detection. The simulation mechanism comprises: an upper piston plate, a lower piston plate, a connecting frame and a driving shaft. The upper piston plate is fixedly mounted on the top of the connecting frame, and the lower piston plate and the upper piston plate are both slidingly and sealingly mounted in the detection box. A slide plate is slidably mounted in the connecting frame, and the driving shaft is rotatably mounted on the rear inner wall of the detection box. Two discs are fixedly sleeved on the outer side of the driving shaft, and a round rod is fixedly mounted on the front side of the disc located on the front side. The slide plate is rotatably sleeved on the outer side of the round rod, and a plurality of connecting columns are fixedly mounted between the two discs. The upper piston plate and the lower piston plate divide the detection box into an upper cavity, a middle cavity and a lower cavity.

[0007] Preferably, a driving plate is fixedly mounted on the top of the lower piston plate, and two threaded holes are provided on the top of the driving plate, a rotating column and two adjusting screws are rotatably mounted on the bottom of the connecting frame, and the two adjusting screws are respectively threadedly mounted in the corresponding threaded holes, a worm is fixedly mounted on the front end of the rotating column, a worm wheel is fixedly mounted on the outer side of the adjusting screw, the worm wheel and the two worm wheels are meshed with each other, a paddle frame is fixedly sleeved on the outer side of the rotating column, and the paddle frame is adapted to the connecting column, and when the paddle frame moves upward, the disc rotates and the paddle frame is pushed to rotate through the connecting column; The threads of the two adjusting screws are in opposite directions and have equal pitches. Guide plates are fixedly installed on both sides of the driving plate. Guide rods are fixedly installed on both sides of the bottom of the connecting frame. The guide plates are slidably sleeved on the outer sides of the corresponding guide rods.

[0008] Preferably, a mounting seat is fixedly installed on the rear side of the detection box, a driving motor and a dynamic torque sensor are fixedly installed on the top of the mounting seat, the output end of the driving motor is fixedly connected to the input end of the dynamic torque sensor, and the output end of the dynamic torque sensor is fixedly connected to the driving shaft; The top of one side of the detection box is connected to an exhaust pipe, and a control valve is provided on the exhaust pipe. The bottom of one side of the detection box is connected to a horizontal pipe, and a first water valve is provided on the horizontal pipe. The other end of the horizontal pipe is connected to a vertical pipe, and a second water valve is provided at the bottom of the vertical pipe. A water pump is fixedly installed on one side of the detection box, and the top of the vertical pipe is connected to the water outlet of the water pump.

[0009] Preferably, the conduction mechanism comprises: a fixing plate, two inner curved tubes and two outer curved tubes, the two inner curved tubes are respectively connected to the top and the bottom of the detection box, one end of the two outer curved tubes is respectively slidably sleeved on the outside of the corresponding inner curved tubes, and the other end of the outer curved tube is connected to a cylindrical joint; One side of the plate heat exchanger body is connected with a plurality of conduits, the cylindrical joint is sleeved on the outer side of the corresponding conduit, a sealing ring is fixedly installed inside the cylindrical joint, and the sealing ring is movably abutted against one end of the conduit; The outer side of the outer bend pipe is fixedly sleeved with a connecting arm, the fixing plate is fixedly installed on the other side of the detection box, the top and bottom of the fixing plate are rotatably installed with a control screw, the other end of the connecting arm is fixedly installed with a square plate, the square plate is threadedly sleeved on the outer side of the corresponding control screw, the top and bottom of the fixing plate are fixedly installed with a guide frame, the square plate is slidably sleeved on the outer side of the corresponding guide frame, and the other end of the control screw is fixedly installed with a knob, the positioning mechanism comprises: a pressing plate, a side plate, a fixing frame and a fixing seat, the fixing frame and the fixing seat are both fixedly installed on the top of the detection table, a cylinder is fixedly installed on one side of the fixing seat, a vertical plate is fixedly installed on the output end of the cylinder, the vertical plate is slidably sleeved on the outer side of the fixing frame, the top of the vertical plate is fixedly connected to the side plate, a first pressure sensor is fixedly installed between the side plate and the pressing plate, and a guide column is fixedly installed on one side of the pressing plate, and the guide column is slidably installed in the side plate; A plurality of baffles are fixedly mounted on one side of the top of the detection platform, and the baffles and the pressure plates are movably abutted against two sides of the plate heat exchanger body respectively.

[0010] Preferably, the driving mechanism comprises: a control motor, an electric push rod and a mounting frame, the electric push rod is fixedly mounted on one side of the mounting frame, a second pressure sensor is fixedly mounted on the output end of the electric push rod, the other end of the second pressure sensor is fixedly connected to the detection box, a sliding seat is fixedly mounted on the bottom of the mounting frame, a screw rod is fixedly mounted on the output shaft of the control motor, and the sliding seat is threadedly sleeved on the outside of the screw rod; The top of the detection table is fixedly installed with an ear plate and a guide rail, the screw rod is rotatably installed in the ear plate, the sliding seat is slidably sleeved on the outside of the guide rail, and a horizontal rod is fixedly installed on one side of the detection box, and the horizontal rod is slidably installed in the mounting frame.

[0011] Preferably, a controller is fixedly installed on the top of the test bench, and the controller is connected to the pressure gauge, the first pressure sensor, the second pressure sensor, the drive motor, the control motor, the cylinder and the electric push rod signal.

[0012] The beneficial effects of the present invention are: In the present invention, a plate heat exchanger pressure detection device is described, which is configured by placing the plate heat exchanger body to be detected on the top of the detection platform and making one side of it contact with the baffle, and then starting the cylinder to drive the vertical plate to move horizontally, and the vertical plate drives the pressure plate to approach the plate heat exchanger body through the side plate and the first pressure sensor, so as to achieve compression and monitor the compression force through the first pressure sensor. When the monitored compression force reaches a preset value, the controller controls the cylinder to stop feeding, so as to complete the fixation of the plate heat exchanger body; In the present invention, a plate heat exchanger pressure detection device is described, which drives the screw rod to rotate by starting the control motor, and the screw rod drives the mounting frame and the detection box to move forward and backward by cooperating with the thread of the sliding seat, and drives the control screw rod to rotate by rotating the knob, and the control screw rod drives the connecting arm and the outer bend pipe to move up and down by the thread transmission with the square plate and under the guidance of the guide frame, and the outer bend pipe drives the cylindrical joint to move up and down, so that the two cylindrical joints are aligned with the two mutually connected conduits, and then the electric push rod is started to drive the detection box to approach the plate heat exchanger body so that the two cylindrical joints are sleeved on the outside of the two conduits, and one end of the conduit is pressed against by the sealing ring, so as to realize the sealed communication between the cylindrical joint and the conduit; In the present invention, a plate heat exchanger pressure detection device is described, which controls the first water valve and the control valve to open, and starts the water pump to introduce water into the lower cavity in the detection box through the vertical pipe and the horizontal pipe, and then introduces water into the interior of the plate heat exchanger body through the inner bend pipe, the outer bend pipe, the cylindrical joint and the conduit below, and makes the water flow back to the upper cavity of the detection box from the conduit, the cylindrical joint, the outer bend pipe and the inner bend pipe above, and exhausts the excess air through the exhaust pipe. When the exhaust pipe discharges the liquid, the control valve and the first water valve are closed and the water pump is stopped, and then the drive motor is started, and the dynamic torque sensor transmits the power of the drive motor. To the driving shaft and drive the two discs to rotate synchronously, the disc drives the round rod to perform circular motion, the round rod drives the connecting frame to move up and down reciprocatingly through the slide plate, the connecting frame drives the upper piston plate and the lower piston plate to move up and down reciprocatingly, when the upper piston plate and the lower piston plate move upward, the water in the upper cavity flows into the lower cavity through the plate heat exchanger body, on the contrary, when the upper piston plate and the lower piston plate move downward, the water in the lower cavity flows into the upper cavity through the plate heat exchanger body, so that the water flows back and forth in the plate heat exchanger body, and the pressure in the detection box is monitored by the pressure gauge to judge whether there is leakage in the plate heat exchanger body; In the present invention, a plate heat exchanger pressure detection device is described, after the connecting frame moves upward, the paddle frame contacts the connecting column, at this time the connecting column follows the disc to perform circular motion, which can push the paddle frame to rotate slightly, and drive the rotating column and the worm to rotate, and the worm drives the two adjusting screws to rotate in opposite directions by meshing with the two worm wheels. Since the threads of the two adjusting screws are in opposite directions and have equal pitches, the two adjusting screws drive the driving plate and the lower piston plate to move to the side away from the connecting frame, so that the space of the hollow cavity is increased, thereby reducing the overall space of the upper cavity and the lower cavity, and the pressure monitored by the pressure gauge increases. The pressure gauge transmits the monitored pressure value to the controller, and the controller analyzes the change of the pressure value against time. When the pressure value increases intermittently and then remains flat, it means that there is no leakage in the plate heat exchanger body under the corresponding pressure value environment. When the pressure value decreases or stops increasing, it means that there is leakage in the plate heat exchanger body. In the present invention, a plate heat exchanger pressure detection device can realize rapid positioning of the plate heat exchanger through the detection platform, baffle and positioning mechanism, and conveniently realize the conduction between the detection device and the heat exchanger through the provided conduction mechanism and driving mechanism, thereby simplifying the detection preparation process, and can automatically simulate the actual operating conditions of the heat exchanger under different pressure conditions through the provided simulation mechanism, thereby realizing automatic detection and improving the comprehensiveness and accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of a plate heat exchanger pressure detection device proposed by the present invention.

[0014] Figure 2 The present invention is a schematic cross-sectional structural diagram of a plate heat exchanger pressure detection device.

[0015] Figure 3 for Figure 2 A partial enlarged view of part A.

[0016] Figure 4 for Figure 2 A partial enlarged view of part B.

[0017] Figure 5 for Figure 2 A partial enlarged view of part C.

[0018] Figure 6 This is a schematic diagram of the three-dimensional structure from another perspective of a plate heat exchanger pressure detection device proposed by the present invention.

[0019] Figure 7 This is a schematic diagram of the three-dimensional structure of the positioning mechanism and the plate heat exchanger body proposed in the present invention.

[0020] Figure 8 This is a schematic diagram of the three-dimensional structure of the driving mechanism and the detection box proposed in the present invention.

[0021] Fig. 9 This is a schematic diagram of the three-dimensional structure of the driving mechanism and the detection box proposed by the present invention from another perspective.

[0022] Fig.10 It is a schematic diagram of the three-dimensional structure of the conduction mechanism proposed by the present invention.

[0023] Fig.11 It is a schematic diagram of the three-dimensional structure of the simulation mechanism proposed in the present invention.

[0024] Fig.12 This is a schematic diagram of the three-dimensional structure of the simulation mechanism proposed by the present invention from another perspective.

[0025] In the figure: 1. test bench; 2. plate heat exchanger body; 201. conduit; 3. test box; 301. exhaust pipe; 302. control valve; 4. drive mechanism; 401. guide rail; 402. control motor; 403. screw rod; 404. sliding seat; 405. mounting frame; 406. electric push rod; 407. second pressure sensor; 5. conduction mechanism; 501. cylinder joint; 502. outer bend pipe; 503. inner bend pipe; 504. connecting arm; 505. knob; 506. square plate; 507. guide frame; 508. fixing plate; 509. sealing ring; 6. simulation mechanism; 601. upper piston plate; 602. lower piston plate; 603 , connecting frame; 604, driving plate; 605, sliding plate; 606, round rod; 607, disc; 608, driving shaft; 609, connecting column; 610, worm; 611, rotating column; 612, paddle frame; 613, worm gear; 614, adjusting screw; 7, positioning mechanism; 701, fixing frame; 702, vertical plate; 703, fixing seat; 704, cylinder; 705, pressure plate; 706, first pressure sensor; 707, side plate; 8, controller; 9, water pump; 901, vertical pipe; 902, second water valve; 903, horizontal pipe; 904, first water valve; 10, pressure gauge; 11, dynamic torque sensor; 12, driving motor. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1-Figure 12A plate heat exchanger pressure detection device comprises: a detection platform 1, a plate heat exchanger body 2, a positioning mechanism 7 and a detection mechanism, the plate heat exchanger body 2 is arranged on the top of the detection platform 1, the positioning mechanism 7 is used to position the plate heat exchanger body 2, the detection mechanism comprises: a detection box 3, a conduction mechanism 5 and a driving mechanism 4, the top of the detection box 3 is connected with a pressure gauge 10, the conduction mechanism 5 is used to achieve conduction between the detection box 3 and the plate heat exchanger body 2, and the driving mechanism 4 is used to control the horizontal movement of the detection box 3; A simulation mechanism 6 is provided in the detection box 3, and the simulation mechanism 6 is used to simulate the fluid flow condition to realize detection. The simulation mechanism 6 includes: an upper piston plate 601, a lower piston plate 602, a connecting frame 603 and a driving shaft 608. The upper piston plate 601 is fixedly installed on the top of the connecting frame 603, and the lower piston plate 602 and the upper piston plate 601 are both slidably and sealedly installed in the detection box 3. A slide plate 605 is slidably installed in the connecting frame 603, and the driving shaft 608 is rotatably installed on the inner wall of the rear side of the detection box 3. Two discs 607 are fixedly sleeved on the outer side of the driving shaft 608, and a round rod 606 is fixedly installed on the front side of the disc 607 located on the front side. The slide plate 605 is rotatably sleeved on the outer side of the round rod 606, and a plurality of connecting columns 609 are fixedly installed between the two discs 607. The upper piston plate 601 and the lower piston plate 602 divide the detection box 3 into an upper cavity, a middle cavity and a lower cavity.

[0028] In this embodiment, a driving plate 604 is fixedly installed on the top of the lower piston plate 602, and two threaded holes are provided on the top of the driving plate 604. A rotating column 611 and two adjusting screws 614 are rotatably installed on the bottom of the connecting frame 603. The two adjusting screws 614 are respectively threadedly installed in the corresponding threaded holes. A worm 610 is fixedly installed on the front end of the rotating column 611, and a worm gear 613 is fixedly installed on the outer side of the adjusting screw 614. The worm 610 and the two worm gears 613 are meshed with each other. A paddle frame 612 is fixedly sleeved on the outer side of the rotating column 611, and the paddle frame 612 is adapted to the connecting column 609. After the paddle frame 612 moves upward, the disc 607 rotates and pushes the paddle frame 612 to rotate through the connecting column 609. The threads of the two adjusting screws 614 are in opposite directions and have equal pitches. Guide plates are fixedly installed on both sides of the driving plate 604, and guide rods are fixedly installed on both sides of the bottom of the connecting frame 603. The guide plates are slidably sleeved on the outer sides of the corresponding guide rods.

[0029] In this embodiment, a mounting seat is fixedly installed on the rear side of the detection box 3, and a driving motor 12 and a dynamic torque sensor 11 are fixedly installed on the top of the mounting seat. The output end of the driving motor 12 is fixedly connected to the input end of the dynamic torque sensor 11, and the output end of the dynamic torque sensor 11 is fixedly connected to the driving shaft 608; The top of one side of the detection box 3 is connected to an exhaust pipe 301, and a control valve 302 is provided on the exhaust pipe 301. The bottom of one side of the detection box 3 is connected to a horizontal pipe 903, and a first water valve 904 is provided on the horizontal pipe 903. The other end of the horizontal pipe 903 is connected to a vertical pipe 901, and a second water valve 902 is provided at the bottom of the vertical pipe 901. A water pump 9 is fixedly installed on one side of the detection box 3, and the top of the vertical pipe 901 is connected to the water outlet of the water pump 9.

[0030] In this embodiment, the conduction mechanism 5 includes: a fixed plate 508, two inner curved tubes 503 and two outer curved tubes 502, the two inner curved tubes 503 are respectively connected to the top and the bottom of the detection box 3, one end of the two outer curved tubes 502 is respectively slidably sleeved on the outer side of the corresponding inner curved tubes 503, and the other end of the outer curved tube 502 is connected to the cylindrical joint 501; One side of the plate heat exchanger body 2 is connected with a plurality of conduits 201, and a cylindrical joint 501 is sleeved on the outer side of the corresponding conduit 201, and a sealing ring 509 is fixedly installed inside the cylindrical joint 501, and the sealing ring 509 is movably abutted against one end of the conduit 201; The outer side of the outer bend pipe 502 is fixedly sleeved with a connecting arm 504, a fixing plate 508 is fixedly installed on the other side of the detection box 3, the top and bottom of the fixing plate 508 are rotatably installed with a control screw, the other end of the connecting arm 504 is fixedly installed with a square plate 506, the square plate 506 is threadedly sleeved on the outer side of the corresponding control screw, the top and bottom of the fixing plate 508 are fixedly installed with a guide frame 507, the square plate 506 is slidably sleeved on the outer side of the corresponding guide frame 507, the other end of the control screw is fixedly installed with a knob 505, and the positioning mechanism 7 includes: a pressing plate 705, Side plate 707, fixing frame 701 and fixing seat 703, fixing frame 701 and fixing seat 703 are fixedly installed on the top of the detection platform 1, a cylinder 704 is fixedly installed on one side of the fixing seat 703, a vertical plate 702 is fixedly installed on the output end of the cylinder 704, the vertical plate 702 is slidably sleeved on the outer side of the fixing frame 701, the top of the vertical plate 702 is fixedly connected to the side plate 707, a first pressure sensor 706 is fixedly installed between the side plate 707 and the pressing plate 705, a guide column is fixedly installed on one side of the pressing plate 705, and the guide column is slidably installed in the side plate 707; A plurality of baffles are fixedly mounted on one side of the top of the inspection platform 1 , and the baffles and the pressure plate 705 are movably abutted against two sides of the plate heat exchanger body 2 .

[0031] In this embodiment, the driving mechanism 4 includes: a control motor 402, an electric push rod 406 and a mounting frame 405, the electric push rod 406 is fixedly mounted on one side of the mounting frame 405, a second pressure sensor 407 is fixedly mounted on the output end of the electric push rod 406, the other end of the second pressure sensor 407 is fixedly connected to the detection box 3, a sliding seat 404 is fixedly mounted on the bottom of the mounting frame 405, a screw rod 403 is fixedly mounted on the output shaft of the control motor 402, and the sliding seat 404 is threadedly sleeved on the outer side of the screw rod 403; An ear plate and a guide rail 401 are fixedly installed on the top of the detection table 1, a screw rod 403 is rotatably installed in the ear plate, a sliding seat 404 is slidably sleeved on the outside of the guide rail 401, and a horizontal rod is fixedly installed on one side of the detection box 3, and the horizontal rod is slidably installed in the mounting frame 405.

[0032] In this embodiment, a controller 8 is fixedly installed on the top of the test bench 1, and the controller 8 is signal-connected to the pressure gauge 10, the first pressure sensor 706, the second pressure sensor 407, the drive motor 12, the control motor 402, the cylinder 704 and the electric push rod 406.

[0033] In this embodiment, when in use, the plate heat exchanger body 2 to be tested is placed on the top of the test bench 1 and one side of the plate heat exchanger is in contact with the baffle, and then the cylinder 704 is started to drive the vertical plate 702 to move horizontally. The vertical plate 702 drives the pressure plate 705 to approach the plate heat exchanger body 2 through the side plate 707 and the first pressure sensor 706, so as to achieve compression and monitor the compression force through the first pressure sensor 706. When the monitored compression force reaches a preset value, the controller 8 controls the cylinder 704 to stop feeding to complete the fixation of the plate heat exchanger body 2, and the screw rod 403 is driven to rotate by starting the control motor 402. The screw rod 403 is brought into contact with the thread of the sliding seat 404. The movable mounting frame 405 and the detection box 3 move forward and backward, and the control screw is driven to rotate by rotating the knob 505. The control screw drives the connecting arm 504 and the outer curved pipe 502 to move up and down under the guidance of the guide frame 507 through the thread transmission with the square plate 506. The outer curved pipe 502 drives the cylindrical joint 501 to move up and down, so that the two cylindrical joints 501 are aligned with the two mutually connected conduits 201. Then, the electric push rod 406 is started to drive the detection box 3 to approach the plate heat exchanger body 2 so that the two cylindrical joints 501 are sleeved on the outside of the two conduits 201, and the sealing ring 509 is pressed against one end of the conduit 201 to achieve sealed communication between the cylindrical joint 501 and the conduit 201; By controlling the first water valve 904 and the control valve 302 to open, and starting the water pump 9 to introduce water into the lower cavity in the detection box 3 through the vertical pipe 901 and the horizontal pipe 903, and then introduce water into the interior of the plate heat exchanger body 2 through the inner bend pipe 503, the outer bend pipe 502, the cylindrical joint 501 and the conduit 201 below, and make the water flow back to the upper cavity of the detection box 3 from the upper conduit 201, the cylindrical joint 501, the outer bend pipe 502 and the inner bend pipe 503, and exhaust the excess air through the exhaust pipe 301. When the exhaust pipe 301 discharges the liquid, the control valve 302 and the first water valve 904 are closed and the water pump 9 stops working, and then the drive motor 12 is started, and the dynamic torque sensor 11 transmits the power of the drive motor 12 to the drive shaft 60 8 and drives the two discs 607 to rotate synchronously, the disc 607 drives the round rod 606 to perform circular motion, the round rod 606 drives the connecting frame 603 to move up and down through the slide plate 605, and the connecting frame 603 drives the upper piston plate 601 and the lower piston plate 602 to move up and down. When the upper piston plate 601 and the lower piston plate 602 move upward, the water in the upper cavity flows into the lower cavity through the plate heat exchanger body 2. On the contrary, when the upper piston plate 601 and the lower piston plate 602 move downward, the water in the lower cavity enters the upper cavity through the plate heat exchanger body 2, so that the water flows back and forth in the plate heat exchanger body 2, and the pressure in the detection box 3 is monitored by the pressure gauge 10, so as to determine whether there is a leakage in the plate heat exchanger body 2; After the connecting frame 603 moves upward, the paddle frame 612 contacts the connecting column 609. At this time, the connecting column 609 follows the disc 607 to perform a circular motion, which can push the paddle frame 612 to rotate slightly, and drive the rotating column 611 and the worm 610 to rotate. The worm 610 drives the two adjusting screws 614 to rotate in opposite directions through the engagement with the two worm wheels 613. Since the threads of the two adjusting screws 614 rotate in opposite directions and have equal pitches, the driving plate 604 and the lower piston plate 602 are driven away from each other through the two adjusting screws 614. One side of the connecting frame 603 moves, so that the space of the hollow cavity increases, thereby reducing the overall space of the upper cavity and the lower cavity, and the pressure monitored by the pressure gauge 10 increases. The pressure gauge 10 transmits the monitored pressure value to the controller 8, and the controller 8 analyzes the change of the pressure value against time. When the pressure value increases intermittently and then remains flat, it means that there is no leakage in the plate heat exchanger body 2 under the corresponding pressure value environment. When the pressure value decreases or stops increasing, it means that there is a leakage in the plate heat exchanger body 2.

[0034] The above is a detailed introduction to a plate heat exchanger pressure detection device provided by the present invention. This article uses specific embodiments to explain the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A plate heat exchanger pressure detection device, characterized in that: include: A test bench (1), a plate heat exchanger body (2), a positioning mechanism (7) and a test mechanism, wherein the plate heat exchanger body (2) is arranged on the top of the test bench (1), the positioning mechanism (7) is used to position the plate heat exchanger body (2), and the test mechanism comprises: a test box (3), a conduction mechanism (5) and a drive mechanism (4), the top of the test box (3) is connected to a pressure gauge (10), the conduction mechanism (5) is used to achieve conduction between the test box (3) and the plate heat exchanger body (2), and the drive mechanism (4) is used to control the horizontal movement of the test box (3); The detection box (3) is provided with a simulation mechanism (6), which is used to simulate the flow condition of the fluid to realize the detection, and the simulation mechanism (6) comprises: an upper piston plate (601), a lower piston plate (602), a connecting frame (603) and a driving shaft (608), wherein the upper piston plate (601) is fixedly mounted on the top of the connecting frame (603), the lower piston plate (602) and the upper piston plate (601) are both slidably and sealably mounted in the detection box (3), and a slide plate (605) is slidably mounted in the connecting frame (603). ), the driving shaft (608) is rotatably mounted on the inner wall of the rear side of the detection box (3), two discs (607) are fixedly sleeved on the outer side of the driving shaft (608), a round rod (606) is fixedly mounted on the front side of the disc (607) located on the front side, the sliding plate (605) is rotatably sleeved on the outer side of the round rod (606), a plurality of connecting columns (609) are fixedly mounted between the two discs (607), and the upper piston plate (601) and the lower piston plate (602) divide the detection box (3) into an upper cavity, a middle cavity and a lower cavity.

2. The plate heat exchanger pressure detection device according to claim 1, characterized in that: A driving plate (604) is fixedly mounted on the top of the lower piston plate (602), and two threaded holes are provided on the top of the driving plate (604). A rotating column (611) and two adjusting screws (614) are rotatably mounted on the bottom of the connecting frame (603), and the two adjusting screws (614) are respectively threadedly mounted in the corresponding threaded holes. A worm (610) is fixedly mounted on the front end of the rotating column (611), and a worm gear (613) is fixedly mounted on the outer side of the adjusting screw (614). The worm (610) and the two worm gears (613) are meshed with each other. A paddle rack (612) is fixedly sleeved on the outer side of the rotating column (611), and the paddle rack (612) is adapted to the connecting column (609). When the paddle rack (612) moves upward, the disc (607) rotates and the paddle rack (612) is pushed to rotate through the connecting column (609). The threads of the two adjusting screws (614) are in opposite directions and have equal pitches. Guide plates are fixedly mounted on both sides of the driving plate (604). Guide rods are fixedly mounted on both sides of the bottom of the connecting frame (603). The guide plates are slidably sleeved on the outer sides of the corresponding guide rods.

3. The plate heat exchanger pressure detection device according to claim 1, characterized in that: A mounting seat is fixedly mounted on the rear side of the detection box (3), a driving motor (12) and a dynamic torque sensor (11) are fixedly mounted on the top of the mounting seat, an output end of the driving motor (12) is fixedly connected to an input end of the dynamic torque sensor (11), and an output end of the dynamic torque sensor (11) is fixedly connected to a driving shaft (608); The top of one side of the detection box (3) is connected to an exhaust pipe (301), and a control valve (302) is provided on the exhaust pipe (301); the bottom of one side of the detection box (3) is connected to a horizontal pipe (903), and a first water valve (904) is provided on the horizontal pipe (903); the other end of the horizontal pipe (903) is connected to a vertical pipe (901), and a second water valve (902) is provided at the bottom of the vertical pipe (901); a water pump (9) is fixedly installed on one side of the detection box (3), and the top end of the vertical pipe (901) is connected to a water outlet of the water pump (9).

4. The plate heat exchanger pressure detection device according to claim 1, characterized in that: The conduction mechanism (5) comprises: a fixing plate (508), two inner curved tubes (503) and two outer curved tubes (502); the two inner curved tubes (503) are respectively connected to the top and the bottom of the detection box (3); one end of the two outer curved tubes (502) is respectively slidably sleeved on the outside of the corresponding inner curved tubes (503); the other end of the outer curved tubes (502) is connected to a cylindrical joint (501); One side of the plate heat exchanger body (2) is connected to a plurality of conduits (201); the cylindrical joint (501) is sleeved on the outside of the corresponding conduit (201); a sealing ring (509) is fixedly installed inside the cylindrical joint (501); the sealing ring (509) is movably abutted against one end of the conduit (201); The outer side of the outer curved tube (502) is fixedly sleeved with a connecting arm (504); the fixing plate (508) is fixedly mounted on the other side of the detection box (3); the top and bottom of the fixing plate (508) are rotatably mounted with control screws; the other end of the connecting arm (504) is fixedly mounted with a square plate (506); the square plate (506) is threadedly sleeved on the outer side of the corresponding control screw; the top and bottom of the fixing plate (508) are fixedly mounted with a guide frame (507); the square plate (506) is slidably sleeved on the outer side of the corresponding guide frame (507); the other end of the control screw is fixedly mounted with a knob (505); the positioning mechanism (7) comprises: a pressing plate (705); a side plate ( 707), a fixing frame (701) and a fixing seat (703), the fixing frame (701) and the fixing seat (703) are both fixedly mounted on the top of the detection platform (1), a cylinder (704) is fixedly mounted on one side of the fixing seat (703), a vertical plate (702) is fixedly mounted on the output end of the cylinder (704), the vertical plate (702) is slidably sleeved on the outer side of the fixing frame (701), the top end of the vertical plate (702) is fixedly connected to the side plate (707), a first pressure sensor (706) is fixedly mounted between the side plate (707) and the pressing plate (705), a guide column is fixedly mounted on one side of the pressing plate (705), and the guide column is slidably mounted in the side plate (707); A plurality of baffles are fixedly mounted on one side of the top of the detection platform (1), and the baffles and the pressure plate (705) are movably abutted against two sides of the plate heat exchanger body (2) respectively.

5. The plate heat exchanger pressure detection device according to claim 1, characterized in that: The driving mechanism (4) comprises: a control motor (402), an electric push rod (406) and a mounting frame (405); the electric push rod (406) is fixedly mounted on one side of the mounting frame (405); a second pressure sensor (407) is fixedly mounted on the output end of the electric push rod (406); the other end of the second pressure sensor (407) is fixedly connected to the detection box (3); a sliding seat (404) is fixedly mounted on the bottom of the mounting frame (405); a screw rod (403) is fixedly mounted on the output shaft of the control motor (402); and the sliding seat (404) is threadedly sleeved on the outer side of the screw rod (403); The top of the detection platform (1) is fixedly mounted with an ear plate and a guide rail (401), the screw rod (403) is rotatably mounted in the ear plate, the sliding seat (404) is slidably sleeved on the outside of the guide rail (401), and one side of the detection box (3) is fixedly mounted with a horizontal rod, which is slidably mounted in a mounting frame (405).

6. The plate heat exchanger pressure detection device according to claim 1, characterized in that: A controller (8) is fixedly mounted on the top of the test bench (1), and the controller (8) is signal-connected to a pressure gauge (10), a first pressure sensor (706), a second pressure sensor (407), a drive motor (12), a control motor (402), a cylinder (704), and an electric push rod (406).

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