Protection structure for heat exchange pipeline of heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, in particular to a heat exchanger heat exchange pipeline protection structure which comprises a heat exchange pipe and a protection frame, the heat exchange pipe is located in the protection frame, an inner layer and an outer layer are arranged in the heat exchange pipe, and connecting pipes are arranged on the two sides in the protection frame. One ends of the two connecting pipes are connected with the two ends of the heat exchange pipe correspondingly, and one ends of the two connecting pipes extend out of the protection frame. The heat exchange tube is completely sealed through the protection frame, the first fixing plate and the second fixing plate, so that an effective safety protection effect on the surface of the heat exchange tube is achieved, the situation that the heat exchange tube is damaged due to the fact that the heat exchange tube is impacted or scratched by the outside world is avoided, and normal and stable operation of the heat exchange tube is ensured; and the heat exchange pipe is sealed and protected through the first heat preservation frame and the second heat preservation frame, a heat preservation cavity is formed in the surface of the heat exchange pipe, meanwhile, a heat insulation cavity is formed in the protection frame, and the heat exchange effect of the heat exchange pipe is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a heat exchange pipeline protection structure of a heat exchanger. Background Art

[0002] Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid, also known as heat exchanger. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler, etc., and is widely used. Heat exchanger is an energy-saving device that realizes heat transfer between materials between two or more fluids at different temperatures, and transfers heat from a higher temperature fluid to a lower temperature fluid.

[0003] The existing heat exchanger heat exchange pipes are easily damaged by external factors during heat exchange due to the lack of safety protection for the heat exchange pipes, which in turn affects the normal use of the heat exchanger. In addition, the existing heat exchange pipes have poor thermal insulation effects, resulting in a large amount of heat waste and a decrease in the heat exchange efficiency of the heat exchanger.

[0004] To this end, we proposed a heat exchange pipe protection structure for a heat exchanger. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a heat exchange pipe protection structure of a heat exchanger, which is used to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a heat exchanger heat exchange pipe protection structure, comprising a heat exchange tube and a protection frame, wherein the heat exchange tube is arranged inside the protection frame, and the heat exchange tube is provided with an inner layer and an outer layer inside, and connecting tubes are arranged on both sides of the protection frame, one end of the two connecting tubes is respectively connected to the two ends of the heat exchange tube, and one end of the two connecting tubes extends to the outside of the protection frame;

[0007] A first heat preservation frame is fixedly arranged on one side of the interior of the protection frame, and a second heat preservation frame is movably arranged on the other side of the interior of the protection frame, the first heat preservation frame is movably and sealedly connected to the side opposite to the second heat preservation frame, a heat preservation cavity is arranged between the first heat preservation frame and the second heat preservation frame, and the heat exchange pipe is arranged inside the heat preservation cavity;

[0008] A first fixing plate and a second fixing plate are fixedly provided on the top and bottom of the protective frame respectively, one side of the first fixing plate is fixedly connected to one side of the first heating frame, and an ultrasonic generator is provided between the first fixing plate and the first heating frame, four micro electric cylinders are fixedly provided on one side of the second fixing plate, and the driving ends of the four micro electric cylinders are fixedly connected to one side of the second heating frame respectively.

[0009] Preferably, an oil guide pipe and an air guide pipe are fixedly provided on one side of the first fixed plate, one end of the oil guide pipe passes through the first fixed plate and the first insulation frame and extends to the inside of the first insulation frame, and one end of the air guide pipe passes through the first fixed plate and extends to the inside of the protective frame.

[0010] Preferably, it also includes:

[0011] The data acquisition module is used to obtain the medium flow values ​​of the inner and outer layers of each position of the heat exchange tube in each cycle, the medium temperature values ​​of the inner and outer layers of each position of the heat exchange tube in each cycle, and the medium density values ​​inside the heat preservation cavity and the heat insulation cavity in each cycle;

[0012] A blockage detection module is used to detect and determine the flow state of the medium inside the heat exchange tube to obtain a blockage detection result;

[0013] A sealing detection module is used to detect and determine the sealing of the medium inside the heat preservation cavity and the thermal insulation cavity to obtain a sealing detection result;

[0014] A control module, used for processing the heat exchange tube of the heat exchanger to the protective structure based on the blockage detection result and the sealing detection result;

[0015] The alarm module is used to issue an alarm prompt for abnormal signals of the heat exchange pipe protection structure of the heat exchanger based on the blockage detection result and the sealing detection result.

[0016] Preferably, the data acquisition module obtains medium flow values ​​of the inner layer and the outer layer of the heat exchange tube, medium temperature values, and medium density values ​​inside the heat preservation cavity and the heat insulation cavity.

[0017] Preferably, the medium flow is numerically collected by flow sensors arranged in the inner and outer layers of the heat exchange tube, the medium temperature is numerically collected by temperature sensors arranged in the inner and outer layers of the heat exchange tube, and the medium density value is numerically collected by pressure sensors arranged inside the heat preservation cavity and the heat insulation cavity. The pressure sensors are used to collect the force of the medium inside the heat preservation cavity and the heat insulation cavity on the unit area, and then the formula is used. The medium density values ​​inside the heat preservation cavity and the thermal insulation cavity are calculated.

[0018] Preferably, the blockage detection module performs detection and judgment based on the acquired medium flow values ​​of the inner and outer layers of the heat exchange tube, the medium temperature values, and the medium density values ​​inside the insulation cavity and the heat insulation cavity to obtain a blockage detection result and a sealing detection result.

[0019] Preferably, the blockage detection module detects and determines the flow values ​​of the inner and outer layers of the medium and the temperature values ​​of the medium in the heat exchange tube to obtain a blockage detection result;

[0020] The specific method is as follows:

[0021] The medium flow values ​​of the inner layer and outer layer of the heat exchange tube at each position in each cycle are marked as OL and CL respectively, where:

[0022] OL = {Oflow i},i=1,2,...,I

[0023] Oflow i ={Oreduce i.n},n=1,2,...,N

[0024] CL = {Cflow i},i=1,2,...,I

[0025] Cflow i = {Creduce i.n},n=1,2,...,N

[0026]

[0027] Where I means that the inner and outer flow rates of the heat exchange tube were tested for a total of I cycles; N means the test position of the heat exchange tube within the test cycle; Oflow i Indicates the detection result of the inner layer flow in the heat exchange tube in the i-th cycle; i,n Indicates the flow of the medium flow in the nth position of the inner layer of the heat exchange tube in the i-th cycle; Cflow i represents the detection result of the outer layer flow rate in the heat exchange tube in the i-th cycle; Creduce i,n Indicates the flow of the medium flow in the nth position of the outer layer of the heat exchange tube in the i-th cycle; Blocking i,n It represents the blockage value of the medium flow at the nth position in the heat exchange tube in the i-th cycle. In addition, l1 is the influence factor of the inner layer medium flow, and l2 is the influence factor of the outer layer medium flow;

[0028] Get the reference blocking threshold of the medium flow inside the heat exchange tube and mark it as Blocking max , the blocking value of the flow inside the heat exchange tube i,n Blocking threshold max If the result of the difference is a positive number, it is determined that the medium inside the heat exchange tube flows normally. If the result of the difference is a negative number, the flow inside the heat exchange tube is blocked. i,n Exceeding the reference blocking threshold maxAt this time, it is determined that the medium flow state inside the heat exchange tube is blocked, the blockage detection module outputs a blockage signal, and the control module controls the ultrasonic generator to start running. The ultrasonic generator is used to perform ultrasonic vibration treatment on the inside of the heat exchange tube to clean the impurities attached to the inner wall of the heat exchange tube.

[0029] Preferably, the sealing detection module detects and determines the sealing of the medium inside the heat preservation cavity and the thermal insulation cavity to obtain a sealing detection result;

[0030] The medium density inside the heat preservation cavity and the insulation cavity is marked as Bρ and Gρ respectively. According to the formula Leak = (Bρ / Bρ m +1)×a1+(Gρ / Gρ m +1)×a2, and get the sealing coefficient, which is marked as Leak, where Bρ m Gρ represents the density threshold of the medium inside the insulation chamber, m represents the density threshold of the medium inside the insulation cavity, and a1 and a2 represent the set weight factors respectively.

[0031] Get the reference density coefficient threshold and mark it as Leak max , the sealing coefficient Leak is compared with the reference density coefficient threshold Leak max If the result of the difference is a positive number, it is determined that the sealing inside the insulation cavity and the thermal insulation cavity is normal. If the result of the difference is a negative number, it is determined that the sealing inside the insulation cavity and the thermal insulation cavity is abnormal. The sealing detection module sends an abnormal signal to the alarm module, and the alarm module sends a processing signal to the monitoring terminal.

[0032] Compared with the prior art, it has the following beneficial effects:

[0033] In the present invention, a protective frame is provided on the outside of the heat exchange tube, and the heat exchange tube is completely sealed by the protective frame, the first fixing plate and the second fixing plate, thereby playing an effective safety protection role for the surface of the heat exchange tube, avoiding the heat exchange tube from being damaged by external impact or scratch, thereby ensuring the normal and stable operation of the heat exchange tube; the heat exchange tube is then sealed and protected by the first insulation frame and the second insulation frame, a heat insulation cavity is formed on the surface of the heat exchange tube, and a heat insulation cavity is formed inside the protective frame at the same time, and then silicone oil is filled inside the heat insulation cavity. Since silicone oil has high thermal stability and high temperature resistance, it can maintain good heat insulation effect in high temperature environment, and the surface of the heat exchange tube is coated with silicone oil to completely coat and insulate the heat inside the heat exchange tube, thereby effectively improving the heat preservation of the heat inside the heat exchange tube by the silicone oil. The heat insulation effect is achieved by filling an equal volume of nitrogen into the heat insulation cavity, and the lower thermal conductivity of nitrogen is used to separate the heat outside the protection frame from the internal heat insulation cavity, so as to prevent external environmental factors from affecting the heat insulation effect of the heat insulation cavity inside the protection frame on the heat exchange tube; an ultrasonic generator on one side of the first heat insulation frame generates ultrasonic vibrations inside the heat insulation cavity, and the ultrasonic vibrations are used to vibrate and clean the scale on the inner wall of the heat exchange tube; the working state of the ultrasonic generator is determined by real-time monitoring of the flow of the high-temperature medium and the low-temperature medium inside the heat exchange tube and the heat exchange effect of the low-temperature medium and the high-temperature medium; and the density of the medium inside the heat insulation cavity and the heat insulation cavity is monitored to ensure that the heat insulation cavity and the heat insulation cavity can play a normal role in heat preservation and heat insulation for the heat exchange tube, so as to prevent leakage of the heat insulation cavity and the heat insulation cavity, and fail to provide effective heat insulation protection for the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of a heat exchange pipe protection structure of a heat exchanger according to an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the internal structure of a protective frame according to an embodiment of the present invention;

[0036] Figure 3 It is a principle block diagram of a blockage detection module and a sealing detection module according to an embodiment of the present invention.

[0037] In the figure, 1. heat exchange tube; 2. protective frame; 3. connecting pipe; 4. first insulation frame; 5. second insulation frame; 6. first fixing plate; 7. second fixing plate; 8. ultrasonic generator; 9. micro electric cylinder; 10. oil guide pipe; 11. air guide pipe. DETAILED DESCRIPTION

[0038] 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.

[0039] Embodiment 1:

[0040] See also Figure 1 and Figure 2 As shown, a heat exchange pipe protection structure of a heat exchanger includes a heat exchange tube 1 and a protection frame 2. The heat exchange tube 1 is arranged inside the protection frame 2, and the heat exchange tube 1 is provided with an inner layer and an outer layer. By allowing a high-temperature medium to flow in the inner layer of the heat exchange tube 1 and allowing a low-temperature medium to flow in the outer layer of the heat exchange tube 1, heat in the high-temperature medium is transferred to the low-temperature medium through the heat exchange tube 1, thereby achieving heat exchange.

[0041] Connecting pipes 3 are provided on both sides of the protection frame 2. One end of the two connecting pipes 3 is connected to the two ends of the heat exchange tube 1 respectively, and one end of the two connecting pipes 3 extends to the outside of the protection frame 2. The medium inside the heat exchange tube 1 is sent in and out through the two connecting pipes 3, thereby realizing the heat exchange operation.

[0042] A first heat preservation frame 4 is fixedly provided on one side of the interior of the protection frame 2, and a second heat preservation frame 5 is movably provided on the other side of the interior of the protection frame 2. The first heat preservation frame 4 is movably and sealedly connected to the side opposite to the second heat preservation frame 5. A heat preservation cavity is provided between the first heat preservation frame 4 and the second heat preservation frame 5, and the heat exchange tube 1 is provided inside the heat preservation cavity.

[0043] The top and bottom of the protection frame 2 are respectively fixedly provided with a first fixing plate 6 and a second fixing plate 7, one side of the first fixing plate 6 is fixedly connected to one side of the first insulation frame 4, and an ultrasonic generator 8 is provided between the first fixing plate 6 and the first insulation frame 4, and four micro-electric cylinders 9 are fixedly provided on one side of the second fixing plate 7, and the driving ends of the four micro-electric cylinders 9 are respectively fixedly connected to one side of the second insulation frame 5, and the second insulation frame 5 is controlled to move inside the protection frame 2 through the driving ends of the micro-electric cylinders 9, and one side of the second insulation frame 5 is controlled to be sealed and connected with one side of the first insulation frame 4, so that a sealed insulation cavity is formed between the first insulation frame 4 and the second insulation frame 5, and the insulation cavity is used to perform insulation operation on the heat exchange tube 1;

[0044] It should be noted here that after controlling the opposite sides of the first insulation frame 4 and the second insulation frame 5 to be closed and connected, an insulation cavity is formed under the cooperation of the first insulation frame 4 and the second insulation frame 5, and at the same time, the outside of the first insulation frame 4 and the second insulation frame 5 and the inner cavity between the protective frame 2, the first fixed plate 6 and the second fixed plate 7 form an insulating cavity. While the insulation cavity is used to insulate the heat exchange tube 1, the insulation cavity is used to separate the heat inside the insulation cavity and the heat outside the protective frame 2, so as to avoid the heat outside the protective frame 2 affecting the insulation effect of the insulation cavity on the heat exchange tube 1, thereby improving the heat exchange effect of the heat exchange tube 1.

[0045] Furthermore, an oil guide pipe 10 and an air guide pipe 11 are fixedly arranged on one side of the first fixed plate 6, one end of the oil guide pipe 10 passes through the first fixed plate 6 and the first insulation frame 4 and extends to the inside of the first insulation frame 4, and one end of the air guide pipe 11 passes through the first fixed plate 6 and extends to the inside of the protection frame 2; after the protective structure outside the heat exchange tube 1 is assembled, silicone oil is introduced into the insulation cavity through the oil guide pipe 10. Since silicone oil has high thermal stability and high temperature resistance, it can maintain good heat preservation in a high temperature environment. In order to improve the heat insulation effect, the inside of the heat insulation cavity is filled with silicone oil, and the surface of the heat exchange tube 1 is coated with silicone oil to completely coat and insulate the heat inside the heat exchange tube 1, thereby effectively improving the heat insulation effect of the silicone oil on the heat inside the heat exchange tube 1, and then nitrogen gas with a volume equal to that of the silicone oil is introduced into the heat insulation cavity through the air guide pipe 11, and the lower thermal conductivity of nitrogen gas is used to separate the heat outside the protective frame 2 from the internal heat insulation cavity, so as to prevent external environmental factors from affecting the heat insulation effect of the internal heat insulation cavity of the protective frame 2 on the heat exchange tube.

[0046] In summary, compared with the prior art, the above protection structure has the following beneficial effects:

[0047] In the present invention, a protective frame 2 is provided on the outside of the heat exchange tube 1, and the protective frame 2, the first fixing plate 6 and the second fixing plate 7 are used to completely seal the heat exchange tube 1, thereby playing an effective safety protection role for the surface of the heat exchange tube 1, avoiding the heat exchange tube 1 from being damaged by external impact or scratches, and ensuring the normal and stable operation of the heat exchange tube 1; the heat exchange tube 1 is then sealed and protected by the first insulation frame 4 and the second insulation frame 5, and an insulation cavity is formed on the surface of the heat exchange tube 1, and an insulating cavity is formed inside the protective frame 2, and then silicone oil is filled inside the insulating cavity. Since silicone oil has high thermal stability and high temperature resistance, it can maintain a good insulation effect in a high temperature environment. The surface of the heat exchange tube 1 is coated with silicone oil to completely coat and insulate the heat inside the heat exchange tube 1, thereby effectively improving the silicone oil's effect on the inside of the heat exchange tube 1. The heat insulation effect of the heat is enhanced, and then an equal volume of nitrogen is filled into the inside of the insulation cavity, and the lower thermal conductivity of nitrogen is used to separate the heat outside the protection frame 2 from the internal insulation cavity, so as to avoid the external environmental factors affecting the insulation effect of the insulation cavity inside the protection frame 2 on the heat exchange tube; the ultrasonic generator 8 on one side of the first insulation frame 4 generates ultrasonic vibration to the inside of the insulation cavity, and the ultrasonic vibration is used to vibrate and clean the scale on the inner wall of the heat exchange tube 1, and the working state of the ultrasonic generator 8 is determined by real-time monitoring of the flow rate of the high-temperature medium and the low-temperature medium inside the heat exchange tube 1 and the heat exchange effect of the low-temperature medium and the high-temperature medium, and then the density of the medium inside the insulation cavity and the insulation cavity is monitored to ensure that the insulation cavity and the insulation cavity can play a normal insulation and heat insulation role for the heat exchange tube 1, avoid leakage of the insulation cavity and the insulation cavity, and fail to provide effective insulation protection for the heat exchange tube 1.

[0048] For further information, see Figure 3 As shown, the heat exchanger heat exchange pipe protection structure also includes a data acquisition module, a blockage detection module, a sealing detection module, a control module and an alarm module;

[0049] The data acquisition module obtains the medium flow values ​​of the inner and outer layers of each position of the heat exchange tube 1 in each cycle, the medium temperature values ​​of the inner and outer layers of each position of the heat exchange tube 1 in each cycle, and the medium density values ​​inside the heat preservation cavity and the heat insulation cavity in each cycle;

[0050] The blockage detection module detects and determines the flow state of the medium inside the heat exchange tube 1 to obtain a blockage detection result;

[0051] The sealing detection module detects and determines the sealing of the medium inside the heat preservation cavity and the heat insulation cavity to obtain the sealing detection result;

[0052] The control module processes the heat exchange tube of the heat exchanger to the protective structure based on the blockage detection result and the sealing detection result;

[0053] The alarm module issues an alarm prompt for abnormal signals of the heat exchange pipe protection structure of the heat exchanger based on the blockage detection results and the sealing detection results.

[0054] The implementation process of the embodiment of the present invention is described in detail below:

[0055] S1, obtaining the medium flow value, medium temperature value and medium density value of the inner and outer layers of the heat exchange tube 1 and the heat preservation cavity and the heat insulation cavity through the data acquisition module;

[0056] Specific:

[0057] The medium flow rate is collected by flow sensors installed in the inner and outer layers of the heat exchange tube 1, the medium temperature is collected by temperature sensors installed in the inner and outer layers of the heat exchange tube 1, and the medium density value is collected by pressure sensors installed inside the heat preservation cavity and the heat insulation cavity. The pressure sensors are used to collect the force of the medium inside the heat preservation cavity and the heat insulation cavity on the unit area, and then the formula is used. Calculate the medium density value inside the heat preservation cavity and the thermal insulation cavity;

[0058] S2, based on the obtained medium flow values ​​of the inner layer and the outer layer of the heat exchange tube 1, the medium temperature values, and the medium density values ​​inside the heat preservation cavity and the heat insulation cavity, detection and determination are performed to obtain a blockage detection result and a sealing detection result;

[0059] Specifically, it is divided into the following two parts:

[0060] 1. The blockage detection module detects and determines the flow values ​​of the inner and outer media and the temperature values ​​of the media in the heat exchange tube 1 to obtain a blockage detection result.

[0061] The specific method is as follows:

[0062] The medium flow values ​​of the inner layer and the outer layer of the heat exchange tube 1 at each position in each cycle are marked as OL and CL respectively, where:

[0063] OL = {Oflow i},i=1,2,...,I

[0064] Oflow i ={Oreduce i.n},n=1,2,...,N

[0065] CL = {Cflow i},i=1,2,...,I

[0066] Cflow i = {Creduce i.n},n=1,2,...,N

[0067]

[0068] Where, I indicates that the inner and outer flow rates of the heat exchange tube 1 are tested for a total of I cycles; N indicates the test position of the heat exchange tube 1 within the test cycle; Oflow i Indicates the detection result of the inner layer flow in the heat exchange tube 1 in the i-th cycle; i,n Indicates the flow of the medium flow in the nth position of the inner layer of the heat exchange tube 1 in the i-th cycle; Cflow i represents the detection result of the outer layer flow rate in heat exchange tube 1 in the i-th cycle; Creduce i,n Indicates the flow of the medium flow in the nth position of the outer layer of the heat exchange tube 1 in the i-th cycle; Blocking i,n represents the blockage value of the medium flow at the nth position in the heat exchange tube 1 in the i-th cycle, and l1 is the influence factor of the inner layer medium flow, and l2 is the influence factor of the outer layer medium flow;

[0069] Get the reference blocking threshold of the medium flow inside heat exchange tube 1 and mark it as Blocking max , the blocking value of the internal flow of heat exchange tube 1 is Blocking i,n Blocking threshold max If the result of the difference is a positive number, it is determined that the medium inside the heat exchange tube 1 flows normally. If the result of the difference is a negative number, the flow inside the heat exchange tube 1 is blocked. i,n Exceeding the reference blocking threshold max At this time, it is determined that the medium flow state inside the heat exchange tube 1 is blocked, the blockage detection module outputs a blockage signal, and the control module controls the ultrasonic generator 8 to start running. The ultrasonic generator 8 is used to perform ultrasonic vibration treatment on the inside of the heat exchange tube 1 to clean the impurities attached to the inner wall of the heat exchange tube 1.

[0070] 2. The medium temperature values ​​of the inner layer and the outer layer of the heat exchange tube 1 at each position in each cycle are marked as OT and CT respectively, where:

[0071] OT={Otemperature j},j=1,2,...,J

[0072] Otemperature j ={Oreduce j,k},k=1,2,...,K

[0073] CT = {Ctemperature j},j=1,2,...,J

[0074] Ctemperature j = {Creduce j,k},k=1,2,...,K

[0075]

[0076] Wherein, J indicates that the temperature of the inner and outer layers of the heat exchange tube 1 is detected for a total of J cycles; K indicates the detection position of the heat exchange tube 1 within the detection cycle; Otemperature j Indicates the detection result of the inner medium temperature in the heat exchange tube 1 in the jth cycle; j,k Indicates the temperature of the medium at the kth position of the inner layer of the heat exchange tube 1 in the jth cycle; Ctemperature j represents the detection result of the outer layer temperature of heat exchange tube 1 in the jth cycle; Creduce j,k Indicates the temperature of the medium at the kth position of the outer layer of the heat exchange tube 1 in the jth cycle; Thickness j,k represents the wall thickness value at the kth position in the heat exchange tube 1 in the jth cycle, and l3 is the influence factor of the inner medium temperature, and l4 is the influence factor of the outer medium temperature;

[0077] Get the reference wall thickness threshold of the medium flow inside heat exchange tube 1 and mark it as Thickness max , the wall thickness value of the internal flow of heat exchange tube 1 j,k Thickness max If the result of the difference is a positive number, the inner wall thickness of heat exchange tube 1 is normal. If the result of the difference is a negative number, the inner wall thickness value of heat exchange tube 1 is j,k Exceeds the reference wall thickness threshold Thickness max At this time, it is determined that the inner wall of the heat exchange tube 1 is too thick, and the blockage detection module outputs a blockage signal. The control module controls the ultrasonic generator 8 to start running, and the ultrasonic generator 8 is used to perform ultrasonic vibration treatment on the inside of the heat exchange tube 1 to clean the impurities attached to the inner wall of the heat exchange tube 1.

[0078] 3. The sealing detection module detects and determines the sealing of the medium inside the heat preservation cavity and the heat insulation cavity to obtain the sealing detection result. The specific method is as follows:

[0079] The medium density inside the heat preservation cavity and the insulation cavity is marked as Bρ and Gρ respectively. According to the formula Leak = (Bρ / Bρ m +1)×a1+(Gρ / Gρm +1)×a2 to get the sealing coefficient Leak, where Bρ m Gρ represents the density threshold of the medium inside the insulation chamber, m represents the density threshold of the medium inside the insulation cavity, a1 and a2 represent the set weight factors respectively;

[0080] Get the reference density coefficient threshold and mark it as Leak max , the sealing coefficient Leak is compared with the reference density coefficient threshold Leak max If the result of the difference is a positive number, it is determined that the sealing inside the insulation cavity and the thermal insulation cavity is normal. If the result of the difference is a negative number, it is determined that the sealing inside the insulation cavity and the thermal insulation cavity is abnormal. The sealing detection module sends an abnormal signal to the alarm module, and the alarm module sends a processing signal to the monitoring terminal.

[0081] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0083] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchange pipe protection structure of a heat exchanger, comprising a heat exchange pipe (1) and a protection frame (2), wherein the heat exchange pipe (1) is arranged inside the protection frame (2), and the interior of the heat exchange pipe (1) is provided with an inner layer and an outer layer, characterized in that: Connecting pipes (3) are provided on both sides of the protection frame (2), one end of the two connecting pipes (3) is respectively connected to the two ends of the heat exchange pipe (1), and one end of the two connecting pipes (3) extends to the outside of the protection frame (2); A first heat preservation frame (4) is fixedly arranged on one side inside the protection frame (2), and a second heat preservation frame (5) is movably arranged on the other side inside the protection frame (2); the first heat preservation frame (4) is movably sealedly connected to the second heat preservation frame (5) on the side opposite to the first heat preservation frame (4); a heat preservation cavity is arranged between the first heat preservation frame (4) and the second heat preservation frame (5), and the heat exchange pipe (1) is arranged inside the heat preservation cavity; A first fixing plate (6) and a second fixing plate (7) are fixedly arranged at the top and bottom of the protection frame (2), respectively; one side of the first fixing plate (6) is fixedly connected to one side of the first heat preservation frame (4), and an ultrasonic generator (8) is arranged between the first fixing plate (6) and the first heat preservation frame (4); four micro electric cylinders (9) are fixedly arranged on one side of the second fixing plate (7), and the driving ends of the four micro electric cylinders (9) are fixedly connected to one side of the second heat preservation frame (5), respectively.

2. A heat exchange pipe protection structure for a heat exchanger according to claim 1, characterized in that: An oil guide pipe (10) and an air guide pipe (11) are respectively fixedly arranged on one side of the first fixed plate (6); one end of the oil guide pipe (10) passes through the first fixed plate (6) and the first heat preservation frame (4) and extends to the interior of the first heat preservation frame (4); one end of the air guide pipe (11) passes through the first fixed plate (6) and extends to the interior of the protective frame (2).

3. A heat exchange pipe protection structure for a heat exchanger according to claim 1, characterized in that: Also includes: A data acquisition module, used to obtain the medium flow values ​​of the inner and outer layers of each position of the heat exchange tube (1) in each cycle, the medium temperature values ​​of the inner and outer layers of each position of the heat exchange tube (1) in each cycle, and the medium density values ​​inside the heat preservation cavity and the heat insulation cavity in each cycle; A blockage detection module, used to detect and determine the flow state of the medium inside the heat exchange tube (1) to obtain a blockage detection result; A sealing detection module is used to detect and determine the sealing of the medium inside the heat preservation cavity and the thermal insulation cavity to obtain a sealing detection result; A control module, used for processing the heat exchange tube of the heat exchanger to the protective structure based on the blockage detection result and the sealing detection result; The alarm module is used to issue an alarm prompt for abnormal signals of the heat exchange pipe protection structure of the heat exchanger based on the blockage detection result and the sealing detection result.

4. A heat exchange pipe protection structure for a heat exchanger according to claim 3, characterized in that: The medium flow is numerically collected by flow sensors arranged in the inner layer and the outer layer of the heat exchange tube (1), the medium temperature is numerically collected by temperature sensors arranged in the inner layer and the outer layer of the heat exchange tube (1), and the medium density value is numerically collected by pressure sensors arranged inside the heat preservation cavity and the heat insulation cavity. The pressure sensors are used to collect the force acting on the unit area of ​​the medium inside the heat preservation cavity and the heat insulation cavity respectively, and then the formula is used to calculate the medium density value. The medium density values ​​inside the heat preservation cavity and the thermal insulation cavity are calculated.

5. The heat exchange pipe protection structure of a heat exchanger according to claim 3, characterized in that: The blockage detection module performs detection and determination based on the acquired medium flow values ​​of the inner and outer layers of the heat exchange tube (1), the medium temperature values, and the medium density values ​​inside the heat preservation cavity and the heat insulation cavity, and obtains a blockage detection result and a sealing detection result.

6. A heat exchange pipe protection structure for a heat exchanger according to claim 5, characterized in that: The blockage detection module detects and determines the flow values ​​of the inner and outer layers of the medium and the temperature values ​​of the medium in the heat exchange tube (1) to obtain a blockage detection result; The specific method is as follows: The medium flow values ​​of the inner layer and the outer layer of the heat exchange tube (1) at each position in each cycle are marked as OL and CL respectively, where: OL={Oflow i },i=1,2,...,I Oflow i ={Oreduce i.n },n=1,2,...,N CL={Cflow i },i=1,2,...,I Cflow i ={Creduce i.n },n=1,2,...,N Wherein, I indicates that the flow rates of the inner layer and the outer layer of the heat exchange tube (1) are detected for a total of I cycles; N indicates the detection position of the heat exchange tube (1) within the detection cycle; Oflow i represents the detection result of the inner layer flow rate in the heat exchange tube (1) in the i-th cycle; i,n represents the flow condition of the medium flow at the nth position of the inner layer of the heat exchange tube (1) in the i-th cycle; Cflow i represents the detection result of the outer layer flow rate of the heat exchange tube (1) in the i-th cycle; Creduce i,n Indicates the flow condition of the medium flow in the nth position of the outer layer of the heat exchange tube (1) in the i-th cycle; Blocking i,n represents the blockage value of the medium flow at the nth position in the heat exchange tube (1) in the i-th cycle, and l1 is the influence factor of the inner layer medium flow, and l2 is the influence factor of the outer layer medium flow; Obtain the reference blocking threshold of the medium flow inside the heat exchange tube (1) and mark it as Blocking max , the blocking value of the internal flow of the heat exchange tube (1) i,n Blocking threshold max If the result of the difference is a positive number, it is determined that the medium inside the heat exchange tube (1) is flowing normally. If the result of the difference is a negative number, the flow inside the heat exchange tube (1) is blocked. i,n Exceeding the reference blocking threshold max At this time, it is determined that the flow state of the medium inside the heat exchange tube (1) is blocked, the blockage detection module outputs a blockage signal, and the control module controls the ultrasonic generator (8) to start running. The ultrasonic generator (8) is used to perform ultrasonic vibration treatment on the inside of the heat exchange tube (1) to clean the impurities attached to the inner wall of the heat exchange tube (1).

7. A heat exchange pipe protection structure for a heat exchanger according to claim 6, characterized in that: The medium temperature values ​​of the inner layer and the outer layer of the heat exchange tube (1) at each position in each cycle are marked as OT and CT respectively, where: OT={Otemperature j },j=1,2,...,J Temperature j ={Reduce j,k },k=1,2,...,K CT={Ctemperature j },j=1,2,...,J Temperature j ={Creduce j,k },k=1,2,...,K Wherein, J indicates that the temperature of the inner and outer layers of the heat exchange tube (1) is detected for a total of J cycles; K indicates the detection position of the heat exchange tube (1) within the detection cycle; Otemperature j represents the detection result of the inner medium temperature in the heat exchange tube (1) in the jth cycle; j,k represents the temperature of the medium at the kth position of the inner layer of the heat exchange tube (1) in the jth cycle; Ctemperature j represents the detection result of the outer layer temperature of the heat exchange tube (1) in the jth cycle; Creduce j,k represents the temperature of the medium at the kth position in the outer layer of the heat exchange tube (1) in the jth cycle; Thickness j,k represents the wall thickness value at the kth position in the heat exchange tube (1) in the jth cycle, and l3 is the influence factor of the inner medium temperature, and l4 is the influence factor of the outer medium temperature; Get the reference wall thickness threshold of the medium flow inside the heat exchange tube (1) and mark it as Thickness max , the wall thickness value of the internal flow of the heat exchange tube (1) j,k Thickness max If the result of the difference is a positive number, it is determined that the thickness of the inner wall of the heat exchange tube (1) is normal. If the result of the difference is a negative number, the wall thickness value of the inner wall of the heat exchange tube (1) is j,k Exceeds the reference wall thickness threshold Thickness max At this time, it is determined that the inner wall of the heat exchange tube (1) is too thick, and the blockage detection module outputs a blockage signal. The control module controls the ultrasonic generator (8) to start running, and the ultrasonic generator (8) is used to perform ultrasonic vibration treatment on the inside of the heat exchange tube (1) to clean the impurities attached to the inner wall of the heat exchange tube (1).

8. The heat exchange pipe protection structure of a heat exchanger according to claim 1, characterized in that: The sealing detection module detects and determines the sealing of the medium inside the heat preservation cavity and the heat insulation cavity to obtain a sealing detection result; The medium density inside the heat preservation cavity and the insulation cavity is marked as Bρ and Gρ respectively. According to the formula Leak = (Bρ / Bρ m +1)×a1+(Gρ / Gρ m +1)×a2, and get the sealing coefficient, which is marked as Leak, where Bρ m Gρ represents the density threshold of the medium inside the insulation chamber, m represents the density threshold of the medium inside the insulation cavity, and a1 and a2 represent the set weight factors respectively. Get the reference density coefficient threshold and mark it as Leak max , the sealing coefficient Leak is compared with the reference density coefficient threshold Leak max If the result of the difference is a positive number, it is determined that the sealing inside the insulation cavity and the thermal insulation cavity is normal. If the result of the difference is a negative number, it is determined that the sealing inside the insulation cavity and the thermal insulation cavity is abnormal. The sealing detection module sends an abnormal signal to the alarm module, and the alarm module sends a processing signal to the monitoring terminal.

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