Heat exchanger detection method and device

Abstract

The present invention discloses a heat exchanger detection method and device, the method includes: regulating pressure, boosting pressure, detecting flow resistance changes, and classifying the quality of the heat exchanger; the device includes: flow resistance detection equipment, detecting the flow resistance changes of the medium under different pressures; explosion detection equipment, providing boosting for the heat exchanger, detecting the pressure bearing capacity of the heat exchanger flow channel; pressure protection device, having the function of preventing overpressure and pressure relief of the heat exchanger channel. The present invention can detect the corresponding limit pressure value when the heat exchanger undergoes slight deformation under different pressures, detect the limit pressure of the heat exchanger, distinguish heat exchangers of different qualities according to the pressure bearing data, ensure that the internal pressure of the heat exchanger is kept within the design parameters, and avoid damage to personnel and equipment due to overpressure explosion.

Description

Technical Field

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

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization.

[0003] Heat exchangers can be divided into floating head heat exchangers, fixed tube sheet heat exchangers, U-shaped tube sheet heat exchangers, and plate heat exchangers according to their structures. Plate heat exchangers are heat exchange equipment with high heat transfer efficiency, small resistance coefficient, and compact structure. Their heat exchange channels are formed by many plates of the same shape stacked on each other, realizing heat exchange between cold and hot fluids in the channels. Compared with traditional shell and tube heat exchangers, the heat transfer coefficient of plate heat exchangers can be increased by 3 to 5 times, and the logarithmic mean temperature difference between inlet and outlet is large, the area occupied by the same heat is reduced, the adaptability is strong, the operating cost is low, and it is easy to clean and easy to disassemble and assemble. Plate heat exchangers are efficient and convenient heat exchange equipment, which are widely used in petroleum, chemical, power, waste heat recovery, refrigeration and HVAC, shipbuilding, food processing and other industries.

[0004] During the production process, heat exchangers have pressure bearing capacity requirements and flow resistance requirements, that is, deformation is not allowed to occur in the working state, especially flow channel deformation will affect its flow resistance; currently, the pressure bearing capacity of the heat exchanger is measured by explosion test to detect the pressure when the heat exchanger cracks. This method cannot detect slight deformation of the flow channel, that is, when the medium flows in the heat exchanger flow channel, it will be affected by internal deformation, resulting in a negative impact on the heat exchange efficiency. At the same time, the explosion test requires strong protection. If the protection is improper, the overpressure explosion inside the heat exchanger will cause damage to personnel and equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a heat exchanger detection method and device to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a heat exchanger detection method, comprising the following steps:

[0007] S1. Adjust and control the ambient temperature;

[0008] S2. A pressure protection device is installed in the medium channel 1 of the heat exchanger, and the pressure protection device is connected to the flow resistance detection device;

[0009] S3. A pressure protection device is installed in the second medium channel of the heat exchanger, and the pressure protection device is connected to the explosion detection equipment;

[0010] S4, start the flow resistance detection device to detect the flow resistance of the medium channel. When the detected flow resistance value is stable within 1.5kPa-2.5kPa, the flow resistance value is kept stable for a certain period of time;

[0011] S5. Start the explosion detection equipment to increase the pressure of medium channel 2 at a steady and gentle rate, with the pressure increase rate ranging from 1MPa / s to 2MPa / s;

[0012] S6. When the flow resistance detection device detects that the current flow resistance value exceeds the stable range, the burst detection device stops boosting the pressure and records the first pressure value, and the flow resistance value is kept stable for a certain period of time;

[0013] S7. If the current pressure value is less than 80% of the design pressure value, it is judged as unqualified and the test is stopped; if the current pressure value is greater than or equal to 80% of the design pressure value, and the flow resistance interval fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged as unqualified and the test is stopped; if it is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged as qualified;

[0014] S8. For qualified heat exchangers, start the burst detection equipment again and continue to increase the pressure smoothly, with the pressure increase rate ranging from 0.3MPa / s to 0.8MPa / s;

[0015] S9. When the flow resistance detection device detects that the current flow resistance value exceeds the stable range, the burst detection device stops boosting the pressure and records the pressure value for the second time. If the flow resistance value fluctuation is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be excellent. If the fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be qualified.

[0016] S10. For the excellent heat exchanger, restart the explosion detection equipment to continue to increase the pressure slowly, and the pressure increase rate range is 0.3MPa / s-0.8MPa / s;

[0017] S11. Before the pressure protection device is activated, the flow resistance detection device detects that the current flow resistance value fluctuation range fluctuates, and when the fluctuation value is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be excellent; if the fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be qualified;

[0018] S12. After the pressure protection device is activated, the flow resistance detection device and the burst detection device are stopped, and the heat exchanger is determined to be of special grade;

[0019] S13, respectively depressurize and disassemble the medium channel 1 and the medium channel 2 to complete the detection.

[0020] Preferably, in S1, the ambient temperature is consistent with the ambient temperature of the heat exchanger usage scenario.

[0021] Preferably, in S4, the flow resistance value is kept stable for 10 minutes.

[0022] Preferably, in S5 and S6, the pressure increasing rate is 1 MPa / s; and in S10, the pressure increasing rate is 0.5 MPa / s.

[0023] A heat exchanger detection device, comprising a flow resistance detection device, a burst detection device and a pressure protection device, characterized in that: the pressure protection device comprises an upper connecting pipe, the bottom end of the upper connecting pipe is fixedly connected to a ball bin, the bottom end of the ball bin is fixedly connected to a middle connecting pipe, the bottom end of the middle connecting pipe is fixedly connected to a pressure testing pipe, the bottom end of the pressure testing pipe is connected to a medium channel one or a medium channel two, the ball bin, the middle connecting pipe and the pressure testing pipe are adapted and fixedly connected with an actuator on the same side; the top end of the upper connecting pipe is connected to the flow resistance detection device or the burst detection device The equipment is connected; a ball valve is rotatably connected in the ball bin, a pressure relief hole is opened on the ball valve, a connecting shaft is fixedly connected to the ball valve, the connecting shaft passes through the ball bin, a buffer is connected to the end of the connecting shaft away from the ball valve, and a pressure relief pipe is fixedly connected to the end of the buffer away from the connecting shaft; a pressure testing membrane is fixedly connected in the pressure testing tube, a plurality of adjustment strips are annularly abutted in the middle of the pressure testing membrane, elastic shrink rods are fixedly connected at both ends of the adjustment strips, a fixing ring is fixedly connected to the end of the elastic shrink rod away from the adjustment strip, and the fixed ring The fixed ring is fixedly connected to the middle part of the inner side of the pressure testing tube, and the outer ring surface of the plurality of adjustment strips is sleeved with a ring rope; the actuator comprises a shell, the shell is provided with a guide groove, the shell is fixedly connected with a power assembly, the top of the power assembly is meshed with the connecting shaft, the bottom of the power assembly is rotatably connected with a power rod, the bottom of the power rod is rotatably connected with an adjusting rod, one end of the adjusting rod is fixedly connected with a rotating ring, the rotating ring is rotatably connected with a supporting ring shaft, the supporting ring shaft is fixedly connected to the bottom of the power assembly, a spring connecting tube is also penetrated through the bottom of the power assembly, the end of the spring connecting tube away from the power assembly penetrates the fixed ring, the spring connecting tube is slidably connected with a limiting rod, the end of the rotating ring away from the supporting ring shaft is rotatably connected with a special-shaped control part, one end of the special-shaped control part contacts the limiting rod, the rotating ring is fixedly connected with a toggle shaft, the toggle shaft contacts the other end of the special-shaped control part, the end of the limit rod away from the special-shaped control part is fixedly connected with a pull ring, and the ring rope passes through the pull ring.

[0024] Preferably, the power assembly includes a bracket, the bracket is fixedly connected to the shell, the spring connecting tube passes through the bottom of the bracket, the support ring shaft is fixedly connected to the bottom of the bracket, the middle of the bracket is slidably connected with a power shaft, the top of the power shaft is meshingly connected with the connecting shaft, the middle of the power shaft is fixedly connected with a fixing plate, the power shaft is sleeved with a tension spring, one end of the tension spring is fixedly connected to the fixing plate, the other end of the tension spring is fixedly connected to the bracket, and the bottom of the power shaft is rotatably connected to the power rod.

[0025] Preferably, a channel is opened in the middle of the connecting shaft, and the pressure relief hole is connected to the pressure relief pipe through the connecting shaft and the buffer component respectively.

[0026] Preferably, the buffer component includes an inlet, which is connected to the connecting shaft channel, and the inlet is connected to a first buffer bin, in which two diverter blocks are arranged, the first buffer bin is connected to a second buffer bin, the second buffer bin is connected to a third buffer bin, the third buffer bin is connected to an outlet, and the outlet is connected to the pressure relief pipe.

[0027] The present invention discloses the following technical effects:

[0028] It can detect the corresponding limit pressure value when the heat exchanger flow channel undergoes slight deformation under different pressures;

[0029] By testing the ultimate pressure of the heat exchanger, heat exchangers of different qualities can be distinguished according to the pressure data;

[0030] By setting up a pressure protection device, the internal pressure of the heat exchanger is guaranteed to be kept within the design parameters, avoiding damage to personnel and equipment due to overpressure explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 A schematic diagram of a process of a heat exchanger detection method of the present invention;

[0033] Figure 2 It is an overall schematic diagram of a heat exchanger detection device of the present invention;

[0034] Figure 3 A diagram showing the connection relationship between a pressure detection membrane, a fixing ring, a power assembly and a ball valve of a heat exchanger detection device of the present invention;

[0035] Figure 4 for Figure 3 A partial enlarged view of part A;

[0036] Figure 5 Two schematic diagrams showing the connection relationship between a pressure detection membrane, a fixing ring, a power assembly and a ball valve of a heat exchanger detection device of the present invention;

[0037] Figure 6 for Figure 5 A partial enlarged view of part B;

[0038] Figure 7 A schematic diagram of a fixing ring of a heat exchanger detection device according to the present invention;

[0039] Figure 8 for Figure 7 A partial enlarged view of part C in the middle;

[0040] Fig. 9 The present invention is a schematic diagram of the cross-sectional structure of a buffer component of a heat exchanger detection device.

[0041] In the figure: 1, upper connecting pipe; 2, middle connecting pipe; 100, ball bin; 101, ball valve; 102, pressure relief hole; 103, connecting shaft; 104, pressure relief pipe; 110, buffer; 111, inlet; 112, first buffer bin; 113, diverter block; 114, second buffer bin; 115, third buffer bin; 116, outlet; 200, pressure detection tube; 201, pressure detection membrane; 210, fixing ring; 211, elastic shrink rod; 212 , adjustment bar; 213, rope ring; 214, ring rope; 300, actuator; 301, guide groove; 310, power assembly; 311, bracket; 312, power shaft; 313, fixing plate; 314, tension spring; 321, power rod; 322, adjustment rod; 323, rotating ring; 324, toggle shaft; 325, special-shaped control part; 326, support ring shaft; 327, limit rod; 328, spring connecting pipe; 329, pull ring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figure 1 As shown, this embodiment provides a heat exchanger detection method, comprising the following steps:

[0045] S1. Adjust and control the ambient temperature.

[0046] The temperature in the testing environment is controlled to reduce the impact of the ambient temperature on the test; the test environment temperature of this embodiment is 18°C-23°C.

[0047] S2. A pressure protection device is installed in the medium channel of the heat exchanger, and the pressure protection device is connected to the flow resistance detection equipment.

[0048] The heat exchanger is divided into a cold inlet and outlet and a hot inlet and outlet, with two cold inlets and outlets and two hot inlets and outlets. Each inlet and outlet is equipped with a pressure protection device, which is installed by a threaded connection or a quick connector connection. The flow resistance detection device is connected to the cold inlet and outlet; the pressure bearing of the pressure protection device needs to be set according to the specific design pressure of the heat exchanger. In this embodiment, the pressure bearing of the pressure protection device is set to 95MPa, the flow resistance detection device is a flow resistance test bench (model: SUP-LXT-200), and the burst detection equipment is a high-pressure liquid burst test bench (model: SUP-RGXT-200).

[0049] S3. A pressure protection device is installed in the second medium channel of the heat exchanger, and the pressure protection device is connected to the explosion detection equipment.

[0050] The explosion detection equipment is connected to the hot inlet and outlet. The temperature of the hot inlet and outlet is high and the temperature difference is large, so a relatively large pressure will be generated, so the connection will be relatively accurate.

[0051] S4. Start the flow resistance detection device to detect the flow resistance of the medium channel. When the detected flow resistance value is stable within 1.5kPa-2.5kPa, the flow resistance value is kept stable for a certain period of time.

[0052] Start the flow resistance detection equipment and wait for the flow resistance value range to stabilize and remain for a certain period of time. The smaller the flow resistance value range, the higher the manufacturing quality of the heat exchanger. The flow resistance value range can be set according to the specific quality requirements of the heat exchanger. The stable flow resistance value range of the heat exchanger in this embodiment is 1.8kPa-2.2kPa.

[0053] S5. Start the explosion detection equipment and increase the pressure of medium channel 2 smoothly and steadily, with the pressure increase rate ranging from 1MPa / s to 2MPa / s.

[0054] Start the explosion detection equipment and increase the pressure of cutoff channel 2. The pressure increase value is set according to the design parameters of the heat exchanger itself. For example, if the design pressure parameter of the heat exchanger is large, the pressure increase rate can be appropriately increased, otherwise the pressure increase rate can be reduced. In this embodiment, the pressure parameter of the heat exchanger is set to 95MPa, and the pressure increase rate of the explosion detection equipment is set between 1MPa / s-2MPa / s.

[0055] S6. When the flow resistance detection device detects that the current flow resistance value exceeds the stable range, the explosion detection device stops boosting the pressure and records the first pressure value, and the flow resistance value is kept stable for a certain period of time.

[0056] In this embodiment, the flow resistance detection device detects that the current maximum flow resistance value exceeds 2.2kPa and / or the minimum value is lower than 1.8kPa, which is determined to be beyond the stable range. The explosion detection device is currently stopped from boosting pressure, and the first pressure value is recorded as 80MPa. The maximum and / or minimum flow resistance value is between 1.8kPa-2.2kPa.

[0057] S7. If the current pressure value is less than 80% of the design pressure value, it is judged as unqualified and the test is stopped; if the current pressure value is greater than or equal to 80% of the design pressure value, and the flow resistance interval fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged as unqualified and the test is stopped; if it is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged as qualified.

[0058] According to the above data reference, the design pressure parameter of the heat exchanger is 95MPa, and the qualified pressure value is 76MPa. The test pressure value and flow resistance range fluctuation value of the heat exchanger meet the qualified requirements. Therefore, the heat exchanger is judged to be qualified. If the current specification heat exchanger is required, the detection equipment is stopped, the heat exchanger is depressurized, and the detection equipment and pressure protection device are disassembled; if the design parameter pressure of the heat exchanger is 95MPa, the test pressure value is 75MPa, and the maximum and / or minimum flow resistance value is between 1.8kPa-2.2kPa, the heat exchanger is judged to be unqualified, the detection equipment is stopped, the heat exchanger is depressurized, and the detection equipment and pressure protection device are disassembled. The pressure protection device is disassembled; if the design parameter pressure of the heat exchanger is 95MPa, the test pressure value is 75MPa, and the maximum and / or minimum flow resistance value is between 1.8kPa-2.2kPa, the heat exchanger is judged to be unqualified, the detection equipment is stopped, the heat exchanger is depressurized, and the detection equipment and pressure protection device are disassembled; if the design parameter pressure of the heat exchanger is 95MPa, the test pressure value is 77MPa, and the maximum and / or minimum flow resistance value is not between 1.8kPa-2.2kPa, the heat exchanger is judged to be unqualified, the detection equipment is stopped, the heat exchanger is depressurized, and the detection equipment and pressure protection device are disassembled.

[0059] S8. For qualified heat exchangers, start the explosion detection equipment again and continue to increase the pressure smoothly. The pressure increase rate range is 0.3MPa / s-0.8MPa / s.

[0060] If a heat exchanger with higher quality than the qualified one is required, the test will continue, the explosion detection equipment will be started, and the qualified heat exchanger will be continuously and smoothly pressurized. In this embodiment, the pressurization rate is between 0.3MPa / s-0.8MPa / s; the pressurization rate is tested according to the specific use of the heat exchanger. If the heat exchanger will quickly increase the pressure before reaching the design pressure in the use scenario, the pressurization rate needs to be appropriately increased during the test phase.

[0061] S9. When the flow resistance detection device detects that the current flow resistance value exceeds the stable range, the explosion detection device stops boosting the pressure and records the pressure value for the second time. If the flow resistance value fluctuation is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be excellent. If the fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be qualified.

[0062] According to the above data reference, when the flow resistance detection device detects that the current maximum and / or minimum flow resistance value is not between 1.8kPa-2.2kPa, the explosion detection device is stopped from increasing the pressure and the current pressure value is recorded. If the current maximum and / or minimum flow resistance value is between 1.8kPa-2.2kPa, the heat exchanger is judged to be superior. If a superior quality heat exchanger is required, the detection device is stopped, the heat exchanger is depressurized, and the detection device and pressure protection device are disassembled. If the current maximum and / or minimum flow resistance value of the heat exchanger is not between 1.8kPa-2.2kPa, the heat exchanger is judged to be qualified, the detection of the heat exchanger is stopped, the heat exchanger is depressurized, and the detection device and pressure protection device are disassembled.

[0063] S10. For excellent heat exchangers, start the explosion detection equipment again to continuously and slowly increase the pressure, and the pressure increase rate range is.

[0064] If a higher quality heat exchanger is required, the explosion detection equipment will be started again for the superior heat exchanger, and the pressure of the heat exchanger will be continuously and smoothly increased. The pressure increase rate range of this embodiment is 0.3MPa / s-0.8MPa / s; the pressure increase rate is tested according to the specific use of the heat exchanger. If the heat exchanger will increase the pressure quickly before reaching the design pressure in the use scenario, the pressure increase rate needs to be appropriately increased during the test phase.

[0065] S11. Before the pressure protection device is activated, the flow resistance detection device detects that the current flow resistance value fluctuation range fluctuates, and when the fluctuation value is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be excellent. If the fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be qualified.

[0066] The pressure design parameter of the pressure protection device is equivalent to the design pressure parameter of the heat exchanger. The pressure protection device is used to prevent the internal pressure of the heat exchanger from exceeding the design pressure and causing harm to personnel and damage to other equipment. When the pressure at the inlet and outlet of the heat exchanger exceeds the pressure design parameter of the pressure protection device, the pressure protection device will cut off the connection between the heat exchanger and the burst detection equipment or the flow resistance detection equipment, and at the same time relieve the pressure inside the heat exchanger. In this embodiment, before the heat exchanger design pressure parameter of 95MPa is reached and the maximum and / or minimum flow resistance value is between 1.8kPa-2.2kPa, the heat exchanger is excellent. If the maximum and / or minimum flow resistance value is not between 1.8kPa-2.2kPa, the heat exchanger is judged to be qualified.

[0067] S12. After the pressure protection device is activated, the flow resistance detection equipment and the burst detection equipment are stopped, and the heat exchanger is determined to be of special grade.

[0068] When the pressure protection device is started, it is proved that the pressure value of the heat exchanger meets the design requirements; the pressure parameter of the pressure protection device of this embodiment is 95MPa. After the pressure protection device is started, the pressure value of the heat exchanger reaches 95MPa, and the maximum and / or minimum flow resistance value is between 1.8kPa-2.2kPa. The heat exchanger is of special grade.

[0069] S13, respectively depressurize and disassemble the medium channel 1 and the medium channel 2 to complete the detection.

[0070] For the heat exchanger that has been tested, it is necessary to release the pressure before disassembly to prevent some unknown dangerous situations caused by internal pressure during disassembly. After the pressure relief is completed, the flow resistance detection equipment and the explosion detection equipment are removed, and finally the pressure protection device is removed to complete the test; this detection method is applicable to various forms of heat exchangers such as plate heat exchangers and U-tube plate heat exchangers.

[0071] Furthermore, in S1, the ambient temperature is consistent with the ambient temperature of the heat exchanger usage scenario.

[0072] The heat exchanger detection temperature should be consistent with the temperature of the usage scenario, which is used to simulate the condition of the heat exchanger at the working temperature to detect the performance of the heat exchanger.

[0073] Furthermore, in S4, the flow resistance value is kept stable for 10 minutes.

[0074] There are many channels inside the heat exchanger, and steady flow is required for 10 minutes. During the steady flow period, the pressure value of the burst detection equipment remains unchanged to ensure the stable flow of the detection medium. If the time is too short and the pressure in the channel has not reached a stable state for pressure increase, the flow resistance value will exceed the preset detection range too early, resulting in inaccurate detection. Too long a time will cause unnecessary waste.

[0075] Specifically, in S5 and S6, the pressure increasing rate is 1 MPa / s; and in S10, the pressure increasing rate is 0.5 MPa / s.

[0076] In this embodiment, the pressure increasing rate of the heat exchanger by the explosion detection equipment in S5 and S6 is 1 MPa / s, and the pressure increasing rate is based on the design pressure parameter of the heat exchanger of 95 MPa and the requirements of the usage scenario; the pressure increasing rate of the heat exchanger by the explosion detection equipment in S10 is 0.5 MPa / s, and the pressure increasing rate is also based on the design pressure parameter of the heat exchanger of 95 MPa and the requirements of the usage scenario.

[0077] Reference Figure 2-Figure 9As shown, this embodiment provides a heat exchanger detection device, including a flow resistance detection device, a burst detection device and a pressure protection device, characterized in that: the pressure protection device includes an upper connecting pipe 1, the bottom end of the upper connecting pipe 1 is fixedly connected to a ball bin 100, the bottom end of the ball bin 100 is fixedly connected to a middle connecting pipe 2, the bottom end of the middle connecting pipe 2 is fixedly connected to a pressure testing pipe 200, the bottom end of the pressure testing pipe 200 is connected to the medium channel 1 or the medium channel 2, and the same side of the ball bin 100, the middle connecting pipe 2 and the pressure testing pipe 200 is adapted and fixedly connected with an actuator 300; the top end of the upper connecting pipe 1 is connected to the flow resistance detection device or the burst detection device; the ball bin 100 is rotated in the middle connecting pipe 200. The ball valve 101 is connected to the ball valve 101, and a pressure relief hole 102 is provided on the ball valve 101. A connecting shaft 103 is fixedly connected to the ball valve 101, and the connecting shaft 103 passes through the ball chamber 100. The end of the connecting shaft 103 away from the ball valve 101 is connected to a buffer 110, and the end of the buffer 110 away from the connecting shaft 103 is fixedly connected to a pressure relief pipe 104; a pressure detection membrane 201 is fixedly connected to the pressure detection tube 200, and a plurality of adjustment strips 212 are annularly abutted in the middle of the pressure detection membrane 201, and elastic shrink rods 211 are fixedly connected at both ends of the adjustment strips 212, and a fixing ring 210 is fixedly connected to the end of the elastic shrink rod 211 away from the adjustment strip 212. 10 is fixedly connected to the middle part of the inner side of the pressure-testing tube 200, and a ring rope 214 is sleeved on the outer ring surface of a plurality of adjustment bars 212; the actuator 300 includes a shell, a guide groove 301 is provided on the shell, a power assembly 310 is fixedly connected in the shell, the top of the power assembly 310 is meshed and connected with the connecting shaft 103, the bottom of the power assembly 310 is rotatably connected with a power rod 321, the bottom end of the power rod 321 is rotatably connected with an adjusting rod 322, one end of the adjusting rod 322 is fixedly connected with a rotating ring 323, the rotating ring 323 is rotatably connected with a supporting ring shaft 326, the supporting ring shaft 326 is fixedly connected to the bottom of the power assembly 310, and the power assembly A spring connecting tube 328 also penetrates the bottom of 310, and the end of the spring connecting tube 328 away from the power component 310 penetrates the fixed ring 210. A limiting rod 327 is slidably connected inside the spring connecting tube 328. The end of the rotating ring 323 away from the support ring shaft 326 is rotatably connected to a special-shaped control part 325, and one end of the special-shaped control part 325 is in contact with the limiting rod 327. A toggle shaft 324 is fixedly connected to the rotating ring 323, and the toggle shaft 324 is in contact with the other end of the special-shaped control part 325. A pull ring 329 is fixedly connected to the end of the limiting rod 327 away from the special-shaped control part 325, and the ring rope 214 penetrates the pull ring 329.

[0078] The device for detecting the heat exchanger includes a flow resistance detection device, a burst detection device and a pressure protection device. The flow resistance detection device is used to detect the disturbance of the flow channel on the medium when the detection medium passes through the flow channel in the heat exchanger; the burst detection device is used to pressurize the detection medium in the heat exchanger flow channel to detect the pressure bearing capacity of the heat exchanger flow channel; the pressure protection device is used to limit the pressure in the heat exchanger flow channel to prevent the internal pressure of the heat exchanger from exceeding the design pressure and causing uncontrollable accidents; the deformation pressure of the pressure detection membrane 201 is related to the design pressure parameter of the heat exchanger In accordance with the above, the design pressure parameter of the heat exchanger in this embodiment is 95MPa. When the pressure detection membrane 201 is subjected to a pressure greater than 95MPa, the current shape will be changed. The protrusion in the middle of the pressure detection membrane 201 pushes against the adjustment strip 212. In this embodiment, there are four adjustment strips 212. The four adjustment strips 212 are combined together to form a 360-degree angle, just surrounding the pressure detection membrane 201. The adjustment strip 212 pushes the elastic shrink rod 211 and drives the ring rope 214 on the outer ring surface. The ring rope 214 contracts and is fixed near the spring connection. The fixed rope ring 213 on the adjustment bar 212 of the tube 328 is limited to pull the pull ring 329, and the pull ring 329 pulls the limit rod 327, and the limit rod 327 slides in the spring connecting tube 328. The rotating wheel at the end of the limit rod 327 close to the special-shaped control part 325 rotates from the side of the special-shaped control part 325 to the bottom of the special-shaped control part 325, so that the limit rod 327 releases the restriction on the special-shaped control part 325, and the special-shaped control part 325 starts to rotate due to the toggle shaft 324, and the rotating ring 323 drives the toggle shaft 324 to rotate. 4 rotates, the adjusting rod 322 drives the rotating ring 323 to rotate, the adjusting rod 322 is rotated and connected by the power rod 321 to pull the adjusting rod 322 from one end of the guide groove 301 to the other end, the power rod 321 is pulled by the power assembly 310, the power assembly 310 rotates the connecting shaft 103, the connecting shaft 103 drives the ball valve 101, and the ball valve 101 rotates 90 degrees; the detection medium can release the pressure of the heat exchanger through the pressure relief hole 102 on the ball valve 101, to ensure that the heat exchanger will not burst due to overpressure;When the pressure relief does not drop below 95 MPa, the pressure detection membrane 201 is still in a deformed state. When the adjusting rod 322 is manually operated to close the ball valve 101, the special-shaped control member 325 cannot be limited because the ring rope 214 is still pulling the limit rod 327. The adjusting rod 322 is released, and the power assembly 310 continues to be connected by meshing with the connecting shaft 103 to open the ball valve 101 for continuous pressure relief. When the pressure relief drops below 95 MPa, the pressure detection membrane 201 returns to its original state, and the elastic shrink rod 211 pushes the adjustment bar 212 to a contact position with the pressure detection membrane 201. The ring rope 214 releases the pull on the limit rod 327. The limit rod 327 is pushed to the limit position by the built-in spring of the spring connecting tube 328. At this time, the adjusting rod 322 can be pulled to the initial position. When the adjusting rod 322 is pulled, The toggle shaft 324 pulls the special-shaped control part 325. The end face of the special-shaped control part 325 close to the limit rod 327 is provided with a slope. The rotating wheel at the end of the limit rod 327 is contracted into the spring connecting rod by the pressure of the slope of the special-shaped control part 325. After the special-shaped control part 325 passes through the limit rod 327, the limit rod 327 is extended by the elastic force of the spring inside the spring connecting rod. At this time, the limit rod 327 limits the special-shaped control part 325 again. When the limit rod 327 limits the special-shaped control part 325, the surface in contact with the special-shaped control part 325 is a vertical surface. At this time, the pressure protection device is returned to its original position. When the pressure detection film 201 is deformed next time, the above action will be repeated to realize the continuous pressurization of the heat exchanger by the blocking detection equipment, and the pressure in the heat exchanger can be released to a safe range, avoiding the occurrence of safety accidents. ;

[0079] Further, the power assembly 310 includes a bracket 311, the bracket 311 is fixedly connected to the outer shell, the spring connecting tube 328 passes through the bottom of the bracket 311, the support ring shaft 326 is fixedly connected to the bottom of the bracket 311, the middle of the bracket 311 is slidably connected with a power shaft 312, the top of the power shaft 312 is meshed with the connecting shaft 103, the middle of the power shaft 312 is fixedly connected with a fixing plate 313, the power shaft 312 is sleeved with a tension spring 314, one end of the tension spring 314 is fixedly connected to the fixing plate 313, the other end of the tension spring 314 is fixedly connected to the bracket 311, and the bottom of the power shaft 312 is rotatably connected to the power rod 321.

[0080] The outer shell provides support for the bracket 311. The hollow design of the bracket 311 reduces weight. The power shaft 312 running through the middle of the bracket 311 pulls the fixing plate 313 through the tension spring 314 inside the bracket 311. The fixing plate 313 pulls the power shaft 312, thereby realizing the function of providing a rotational power source for closing the ball valve 101.

[0081] Furthermore, a channel is opened in the middle of the connecting shaft 103 , and the pressure relief hole 102 is connected to the pressure relief pipe 104 through the connecting shaft 103 and the buffer member 110 .

[0082] The hollow connecting shaft 103 is connected to the pressure relief hole 102 on the ball valve 101. The connected channel is from the pressure relief hole 102 to the channel inside the ball valve 101, and then connected to the channel in the middle of the connecting shaft 103. When the pressure protection device is activated, it means that the internal pressure of the heat exchanger is relatively large, and the detection medium coming out of the heat exchanger will be ejected. At this time, the buffer 110 will release the pressure of the ejected detection medium to reduce the negative impact of the discharge of high-pressure detection medium on the outside. The pressure relief pipe 104 is used to extend the position where the detection medium flows out. The end of the pressure relief pipe 104 away from the buffer 110 can be connected to a collection pipe for collecting the detection medium, thereby reducing the waste of the detection medium and improving the reuse rate of the detection medium.

[0083] Further, the buffer member 110 includes an inlet 111, which is connected to the channel of the connecting shaft 103, and the inlet 111 is connected to a first buffer bin 112. Two diverter blocks 113 are arranged in the first buffer bin 112. The first buffer bin 112 is connected to a second buffer bin 114, and the second buffer bin 114 is connected to a third buffer bin 115. The third buffer bin 115 is connected to an outlet 116, and the outlet 116 is connected to the pressure relief pipe 104.

[0084] The inlet 111 of the buffer member 110 is connected to the channel opened in the middle of the connecting shaft 103, and the outlet 116 is connected to the pressure relief pipe 104. The high-pressure detection medium passes through the first buffer bin 112, the second buffer bin 114 and the third buffer bin 115, and the pressure of the high-pressure detection medium is continuously reduced. To reduce the pressure of the high-pressure detection medium, the diverter block 113 can disturb the high-speed circulating detection medium, further reduce its circulation speed, and reduce the probability of injury to external personnel or equipment caused by the injection of the high-pressure detection medium.

[0085] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A heat exchanger detection method, characterized in that: The following steps are involved: S1. Adjust and control the ambient temperature; S2. A pressure protection device is installed in the medium channel of the heat exchanger, and the pressure protection device is connected to the flow resistance detection device; S3. A pressure protection device is installed in the second medium channel of the heat exchanger, and the pressure protection device is connected to the explosion detection equipment; S4, start the flow resistance detection device to detect the flow resistance of the medium channel. When the detected flow resistance value is stable within 1.5kPa-2.5kPa, the flow resistance value is kept stable for a certain period of time; S5. Start the explosion detection equipment to increase the pressure of medium channel 2 at a steady and gentle rate, with the pressure increase rate ranging from 1MPa / s to 2MPa / s; S6. When the flow resistance detection device detects that the current flow resistance value exceeds the stable range, the burst detection device stops boosting the pressure and records the first pressure value, and the flow resistance value is kept stable for a certain period of time; S7. If the current pressure value is less than 80% of the design pressure value, it is judged as unqualified and the test is stopped; if the current pressure value is greater than or equal to 80% of the design pressure value, and the flow resistance interval fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged as unqualified and the test is stopped; if it is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged as qualified; S8. For qualified heat exchangers, start the burst detection equipment again and continue to increase the pressure smoothly, with the pressure increase rate ranging from 0.3MPa / s to 0.8MPa / s; S9. When the flow resistance detection device detects that the current flow resistance value exceeds the stable range, the burst detection device stops boosting the pressure and records the pressure value for the second time. If the flow resistance value fluctuation is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be excellent. If the fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be qualified. S10. For the excellent heat exchanger, restart the explosion detection equipment to continue to increase the pressure smoothly, and the pressure increase rate range is 0.3MPa / s-0.8MPa / s; S11. Before the pressure protection device is activated, the flow resistance detection device detects that the current flow resistance value fluctuation range fluctuates, and when the fluctuation value is within the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be excellent; if the fluctuation value is outside the range of 1.5kPa-2.5kPa, the heat exchanger is judged to be qualified; S12. After the pressure protection device is activated, the flow resistance detection device and the burst detection device are stopped, and the heat exchanger is determined to be of special grade; S13, respectively depressurize and disassemble the medium channel 1 and the medium channel 2 to complete the detection.

2. The heat exchanger detection method according to claim 1, characterized in that: In S1, the ambient temperature is consistent with the ambient temperature of the heat exchanger usage scenario.

3. The heat exchanger detection method according to claim 1, characterized in that: In S4, the flow resistance value is kept stable for 10 minutes.

4. The heat exchanger detection method according to claim 1, characterized in that: In S5 and S6, the pressure increasing rate is 1 MPa / s; and in S10, the pressure increasing rate is 0.5 MPa / s.

5. A heat exchanger detection device, comprising a flow resistance detection device, a burst detection device and a pressure protection device, characterized in that: The pressure protection device comprises an upper connecting tube (1), a ball bin (100) is fixedly connected to the bottom end of the upper connecting tube (1), a middle connecting tube (2) is fixedly connected to the bottom end of the ball bin (100), a pressure testing tube (200) is fixedly connected to the bottom end of the middle connecting tube (2), the bottom end of the pressure testing tube (200) is connected to the first medium channel or the second medium channel, and an actuator (300) is adapted and fixedly connected to the same side of the ball bin (100), the middle connecting tube (2) and the pressure testing tube (200); The top end of the upper connecting pipe (1) is connected to the flow resistance detection device or the burst detection device; A ball valve (101) is rotatably connected in the ball bin (100), a pressure relief hole (102) is provided on the ball valve (101), a connecting shaft (103) is fixedly connected to the ball valve (101), the connecting shaft (103) passes through the ball bin (100), a buffer component (110) is connected to the end of the connecting shaft (103) away from the ball valve (101), and a pressure relief pipe (104) is fixedly connected to one end of the buffer component (110) away from the connecting shaft (103); A pressure-testing membrane (201) is fixedly connected inside the pressure-testing tube (200), a plurality of adjustment strips (212) are annularly abutted in the middle of the pressure-testing membrane (201), elastic shrink rods (211) are fixedly connected at both ends of the adjustment strip (212), a fixing ring (210) is fixedly connected at one end of the elastic shrink rod (211) away from the adjustment strip (212), the fixing ring (210) is fixedly connected to the middle of the inner side of the pressure-testing tube (200), and a ring rope (214) is sleeved on the outer annular surface of a plurality of the adjustment strips (212); The actuator (300) comprises a housing, a guide groove (301) is provided on the housing, a power assembly (310) is fixedly connected inside the housing, the top of the power assembly (310) is meshedly connected to the connecting shaft (103), the bottom of the power assembly (310) is rotatably connected to a power rod (321), the bottom of the power rod (321) is rotatably connected to an adjustment rod (322), one end of the adjustment rod (322) is fixedly connected to a rotating ring (323), the rotating ring (323) is rotatably connected to a support ring shaft (326), the support ring shaft (326) is fixedly connected to the bottom of the power assembly (310), and a spring connecting pipe (328) runs through the bottom of the power assembly (310), the spring connecting pipe (328) is connected to the bottom of the power assembly (310). One end of the through pipe (328) away from the power assembly (310) passes through the fixed ring (210); a limit rod (327) is slidably connected in the spring connecting pipe (328); one end of the rotating ring (323) away from the supporting ring shaft (326) is rotatably connected to a special-shaped control member (325); one end of the special-shaped control member (325) is in contact with the limit rod (327); a toggle shaft (324) is fixedly connected to the rotating ring (323); the toggle shaft (324) is in contact with the other end of the special-shaped control member (325); one end of the limit rod (327) away from the special-shaped control member (325) is fixedly connected to a pull ring (329); and the ring rope (214) passes through the pull ring (329).

6. The heat exchanger detection device according to claim 5, characterized in that: The power assembly (310) comprises a bracket (311), wherein the bracket (311) is fixedly connected to the housing, the spring connecting pipe (328) passes through the bottom of the bracket (311), the support ring shaft (326) is fixedly connected to the bottom of the bracket (311), a power shaft (312) is slidably connected to the middle of the bracket (311), the top of the power shaft (312) is meshingly connected to the connecting shaft (103), a fixing plate (313) is fixedly connected to the middle of the power shaft (312), a tension spring (314) is sleeved on the power shaft (312), one end of the tension spring (314) is fixedly connected to the fixing plate (313), the other end of the tension spring (314) is fixedly connected to the bracket (311), and the bottom of the power shaft (312) is rotatably connected to the power rod (321).

7. The heat exchanger detection device according to claim 5, characterized in that: A channel is provided in the middle of the connecting shaft (103), and the pressure relief hole (102) is connected to the pressure relief pipe (104) through the connecting shaft (103) and the buffer component (110) respectively.

8. The heat exchanger detection device according to claim 7, characterized in that: The buffer component (110) comprises an inlet (111), the inlet (111) being connected to a channel of the connecting shaft (103), the inlet (111) being connected to a first buffer bin (112), two flow dividing blocks (113) being arranged in the first buffer bin (112), the first buffer bin (112) being connected to a second buffer bin (114), the second buffer bin (114) being connected to a third buffer bin (115), the third buffer bin (115) being connected to an outlet (116), and the outlet (116) being connected to the pressure relief pipe (104).

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