Method, device and equipment for determining leakage point of tubular heat exchanger and medium

Abstract

The invention discloses a tubular heat exchanger leakage point determination method and device, equipment and a medium, and belongs to the technical field of metallurgy. The method comprises the steps that after the tubular heat exchanger is horizontally placed, the tubular heat exchanger is filled with water with the set water pressure, and the position and the total volume of flowing water at the bottom of the tubular heat exchanger are determined; according to the position of the flowing water, the row where the leakage point on the heat exchange tube is located is determined and recorded as a leakage row; inserting a prefabricated water insulation device into the leakage row, moving the water insulation device, obtaining the volume of flowing water at the bottom of the tubular heat exchanger after the water insulation device is moved, and determining the column and the layer where the leakage point is located according to the total volume and the volume after the water insulation device is inserted. Wherein the water separation device is used for collecting water leaked from the leakage point. The method not only can reduce workload, but also is high in speed and high in accuracy.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and in particular, to a method, device, equipment and medium for determining the leakage point of a tubular heat exchanger. Background Art

[0002] A tubular heat exchanger, also known as a shell-and-tube heat exchanger or a tube-in-tube heat exchanger, is a typical shell-and-tube heat exchanger and is widely used in the industrial field. The tubular heat exchanger exchanges heat through the tube wall. A large tubular heat exchanger has many and dense heat exchange tubes, and has high requirements for the tightness of the tubes. If a leakage occurs in the tubular heat exchange tube, it is necessary to quickly find the leakage point and deal with the leakage point to avoid affecting production for a long time.

[0003] In the prior art, when it is found that a tubular heat exchanger leaks, each heat exchange tube is subjected to a pressure test for leakage until the leakage point is found.

[0004] However, performing a pressure test for leakage on each heat exchange tube one by one has a very high working intensity and a slow speed. In the later stage of the test, the staff is prone to slack off, resulting in a poor accuracy of leak detection. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a method, device, equipment and medium for determining the leakage point of a tubular heat exchanger to solve the above problems. The water isolation device can be inserted into the tubular heat exchanger, and according to the volume of water flowing at the bottom of the tubular heat exchanger before and after insertion, the row, column and layer where the leakage point on the heat exchange tube is located can be determined, so as to determine the position of the leakage point. This method can not only reduce the workload, but also has a fast speed and high accuracy.

[0006] In a first aspect, the present invention provides a method for determining the leakage point of a tubular heat exchanger. The tubular heat exchanger includes multiple rows of heat exchange tubes in the length direction, multiple columns of heat exchange tubes in the width direction, and multiple layers of heat exchange tubes in the height direction. The length direction of the heat exchange tube is parallel to the length direction of the tubular heat exchanger. The method includes:

[0007] After the tubular heat exchanger is placed horizontally, fill the tubular heat exchanger with water at a set water pressure, and determine the position and total volume of the water flowing at the bottom of the tubular heat exchanger;

[0008] According to the position of the flowing water, determine the row where the leakage point on the heat exchange tube is located, denoted as the leakage row;

[0009] Insert the prefabricated water isolation device into the leakage row, move the water isolation device, obtain the inserted volume of the water flowing at the bottom of the tubular heat exchanger after moving, and determine the column and layer where the leakage point is located according to the total volume and the inserted volume;

[0010] Wherein, the water isolation device is used to collect the water leaked from the leakage point.

[0011] Optionally, moving the water-blocking device, obtaining the inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement, and determining the column and layer where the leakage point is located according to the total volume and the inserted volume, includes:

[0012] Moving the water-blocking device to different layers, obtaining the first inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement, and determining the layer where the leakage point is located according to the total volume and the first inserted volume, which is denoted as the leakage layer;

[0013] Moving the water-blocking device so that the heat exchange tubes in different columns within the leakage layer are above the water-blocking device, obtaining the second inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement, and determining the column where the leakage point is located according to the total volume and the second inserted volume.

[0014] Optionally, moving the water-blocking device to different layers, obtaining the first inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement, and determining the layer where the leakage point is located according to the total volume and the first inserted volume, includes:

[0015] Moving the water-blocking device to the initial layer, obtaining the first inserted volume of the water flowing at the bottom of the tubular heat exchanger, and calculating the first difference between the total volume and the first inserted volume;

[0016] If the first difference is greater than a preset difference threshold, move the water-blocking device upward from the initial layer until, when the water-blocking device is in the first target layer, the corresponding first difference is less than or equal to the difference threshold, and when the water-blocking device is in the layer below the first target layer, the corresponding first difference is greater than the difference threshold, then determine that the leakage point is in the first target layer.

[0017] Optionally, after calculating the first difference between the total volume and the first inserted volume, the method further includes:

[0018] If the first difference is less than or equal to the difference threshold, move the water-blocking device downward from the initial layer until, when the water-blocking device is in the second target layer, the corresponding first difference is greater than the difference threshold, and when the water-blocking device is in the layer above the second target layer, the corresponding first difference is less than or equal to the difference threshold, then determine that the leakage point is in the layer above the second target layer.

[0019] Optionally, moving the water-blocking device so that the heat exchange tubes in different columns within the leakage layer are above the water-blocking device, obtaining the second inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement, and determining the column where the leakage point is located according to the total volume and the second inserted volume, includes:

[0020] Insert the water isolation device into the leakage row at an inclined set angle so that the heat exchange tubes of the rows in front of the initial row in the leakage layer are above the water isolation device, and the heat exchange tubes of the first remaining rows are below the water isolation device. Obtain the second volume after insertion of the flowing water at the bottom of the tubular heat exchanger, and calculate the second difference between the total volume and the second volume after insertion; the first remaining rows are the rows except the rows in front of the initial row.

[0021] If the second difference is greater than a preset difference threshold, move the water isolation device forward to the row in front of the initial row until, in the leakage layer, when the heat exchange tubes of the rows in front of the first target row are above the board and the heat exchange tubes of the second remaining rows are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, and when the heat exchange tubes of the rows in front of the second target row are above the board and the heat exchange tubes of the third remaining rows are below the water isolation device, the corresponding second difference is greater than the difference threshold, then determine that the leakage point is in the first target row.

[0022] Wherein, the second remaining rows are the rows except the rows in front of the first target row, the third remaining rows are the rows except the rows in front of the second target row, and the second target row is the row behind the first target row.

[0023] Optionally, after calculating the second difference between the total volume and the second volume after insertion, the method further includes:

[0024] If the second difference is less than or equal to the difference threshold, move the water isolation device backward to the row behind the initial row until, in the leakage layer, when the heat exchange tubes of the rows in front of the third target row are above the board and the heat exchange tubes of the fourth remaining rows are below the water isolation device, the corresponding second difference is greater than the difference threshold, and when the heat exchange tubes of the rows in front of the fourth target row are above the board and the heat exchange tubes of the fifth remaining rows are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, then determine that the leakage point is in the fourth target row.

[0025] Wherein, the fourth remaining rows are the rows except the rows in front of the third target row, the fifth remaining rows are the rows except the rows in front of the fourth target row, and the fourth target row is the row in front of the third target row.

[0026] Optionally, if the distance between each row of heat exchange tubes and each layer of heat exchange tubes is equal, the set angle is 45 degrees.

[0027] Second aspect, the present invention provides a device for determining leakage points of a tubular heat exchanger. The tubular heat exchanger includes multiple rows of heat exchange tubes in the length direction, multiple columns of heat exchange tubes in the width direction, and multiple layers of heat exchange tubes in the height direction. The length direction of the heat exchange tubes is parallel to the length direction of the tubular heat exchanger. The device includes:

[0028] A first determination module, configured to, after horizontally placing the tubular heat exchanger, fill the tubular heat exchanger with water at a set water pressure, and determine the position and total volume of the water flowing at the bottom of the tubular heat exchanger;

[0029] A second determination module, configured to determine the row where the leakage point on the heat exchange tube is located according to the position of the flowing water, denoted as the leakage row;

[0030] A third determination module, configured to insert a prefabricated water isolation device into the leakage row, move the water isolation device, obtain the volume after insertion of the water flowing at the bottom of the tubular heat exchanger after movement, and determine the column and layer where the leakage point is located according to the total volume and the volume after insertion;

[0031] Wherein, the water isolation device is used to collect the water leaked from the leakage point.

[0032] Third aspect, the present invention provides an electronic device, including: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the method as described in the first aspect.

[0033] Fourth aspect, the present invention provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and the computer instructions are used to cause the computer to execute the method as described in the first aspect.

[0034] The technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:

[0035] A method, device, equipment and medium for determining leakage points of a tubular heat exchanger provided in the embodiments of the present invention. After horizontally placing the tubular heat exchanger, fill the tubular heat exchanger with water at a set water pressure, and determine the position and total volume of the water flowing at the bottom of the tubular heat exchanger to understand the amount and position of the flowing water; according to the position of the flowing water, determine the row where the leakage point on the heat exchange tube is located, denoted as the leakage row; insert a prefabricated water isolation device into the leakage row, move the water isolation device, change whether the leaked water is caught by moving the water isolation device, then obtain the volume after insertion of the water flowing at the bottom of the tubular heat exchanger after movement, and determine the column and layer where the leakage point is located according to the total volume and the volume after insertion, so as to determine the position of the leakage point. This method can not only reduce the workload, but also be fast and accurate.

[0036] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are hereinafter specifically exemplified. Description of the Drawings

[0037] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0038] Figure 1 is a schematic structural diagram of a tubular heat exchanger provided by an embodiment of the present invention;

[0039] Figure 2 is a flowchart of a method for determining a leakage point of a tubular heat exchanger provided by an embodiment of the present invention;

[0040] Figure 3 is a structural block diagram of a device for determining a leakage point of a tubular heat exchanger provided by an embodiment of the present invention. Detailed Embodiments

[0041] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the drawings. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0042] Before introducing in detail a method for determining a leakage point of a tubular heat exchanger provided by an embodiment of the present invention, a brief introduction to its application scenario will be given first.

[0043] Figure 1 is a schematic structural diagram of a tubular heat exchanger provided by an embodiment of the present invention, as Figure 1 shown, the tubular heat exchanger includes multiple rows of heat exchange tubes 1 in the length direction X, and each row of heat exchange tubes 1 is separated by a partition plate 2; in the width direction Y, it includes multiple columns of heat exchange tubes 1, and in the height direction Z, it includes multiple layers of heat exchange tubes 1. Each column and each layer of heat exchange tubes 1 are fixed on the partition plate 2. Among them, the length direction of the heat exchange tube 1 is parallel to the length direction X of the tubular heat exchanger.

[0044] Figure 2 is a flowchart of a method for determining a leakage point of a tubular heat exchanger provided by an embodiment of the present invention, as Figure 2 shown, the method includes:

[0045] Step S210: After placing the tubular heat exchanger horizontally, fill the tubular heat exchanger with water at a set water pressure, and determine the position and total volume of the water flowing at the bottom of the tubular heat exchanger.

[0046] In the embodiment of the present application, the tubular heat exchanger is placed horizontally so that the bottom surface of the tubular heat exchanger is parallel to the horizontal plane. Then, the tubular heat exchanger is filled with water and maintained at the set water pressure. Among them, the set water pressure can be the rated water pressure of the tubular heat exchanger.

[0047] When the tubular heat exchanger is filled with water, the leakage points on the heat exchange tubes will start to leak water. Since the tubular heat exchanger is placed horizontally, the water leaked from the leakage points will gather at the bottom of the tubular heat exchanger. Then, detect which position at the bottom of the heat exchanger is flowing water, that is, determine the position of the flowing water, and catch the flowing water with a container to measure the total volume of the flowing water. The total volume can be the volume within a set time.

[0048] Step S220: According to the position of the flowing water, determine the row where the leakage point on the heat exchange tube is located, and record it as the leakage row.

[0049] In the embodiment of the present application, since the water leaked from the heat exchange tubes on which row will flow out from the bottom of that row, the row where the position of the flowing water is located is the row where the leakage point on the heat exchange tube is located, and this row is recorded as the leakage row.

[0050] Step S230: Insert the prefabricated water isolation device into the leakage row, move the water isolation device, obtain the inserted volume of the water flowing at the bottom of the tubular heat exchanger after moving, and determine the column and layer where the leakage point is located according to the total volume and the inserted volume.

[0051] In the embodiment of the present application, the water isolation device can be prefabricated, and the water isolation device is used to collect the water leaked from the leakage point. Among them, the water isolation device can be a water tank or a water isolation plate, and the water isolation plate can be a 1 mm thick tetrafluoroethylene plate.

[0052] Specifically, since the leakage point has been determined to be within the leakage row, the water isolation device is inserted into the leakage row to search for the leakage point within the leakage row. After the water isolation device is inserted, measure the volume of the flowing water at the bottom of the tubular heat exchanger, which is denoted as the post-insertion volume, that is, the volume of the flowing water at the bottom of the tubular heat exchanger after the water isolation device is inserted. If the leakage point is above the water isolation device and the water isolation device can collect the leaked water, then the post-insertion volume of the flowing water at the bottom of the tubular heat exchanger will change significantly compared to the total volume; if the leakage point is below the water isolation device and the water isolation device cannot collect the leaked water, then the post-insertion volume of the flowing water at the bottom of the tubular heat exchanger will not change significantly compared to the total volume. Therefore, based on the post-insertion volume after the water isolation device is inserted and the total volume, it is possible to identify which column and which layer the leakage point is in the leakage row, thereby determining the location of the leakage point, making the method for determining the leakage point faster and more convenient, reducing the time for the inspection personnel to work at heights, and having high accuracy.

[0053] Among them, by moving the water isolation device, the position for collecting the leaked water can be changed, thereby changing the post-insertion volume. The post-insertion volume can be the total post-insertion volume within a set time.

[0054] In the embodiment of the present application, after finding the location of the leakage point, a conical nylon plug suitable for the diameter size of the heat exchange tube is used to block the leakage point. After blocking, fill the tube side of the large heat exchanger with water again, maintain the rated pressure of the equipment, and check whether there is still leaked water. If not, it is verified that the leakage detection is successful, and the tubular heat exchanger can be restored to work.

[0055] In the embodiment of the present application, a coordinate system can also be established for the tubular heat exchanger, as Figure 1 shown. The X direction is the horizontal axis of the coordinate system, the Y direction is the vertical axis of the coordinate system, and the Z direction is the vertical axis of the coordinate system. The abscissa of the leakage row in the coordinate system is the abscissa of the leakage point, and the ordinate and vertical coordinate corresponding to the column and layer where the leakage point is located are the ordinate and vertical coordinate of the leakage point respectively.

[0056] Optionally, step S230 includes:

[0057] First step, move the water isolation device to different layers, obtain the first post-insertion volume of the flowing water at the bottom of the tubular heat exchanger after the movement, and determine the layer where the leakage point is located based on the total volume and the first post-insertion volume, which is denoted as the leakage layer.

[0058] As Figure 1 shown, horizontally insert the water isolation device b into a certain layer. Since the distance between layers is small, the height of the water isolation device b should be less than the distance between layers; when the water isolation device b is inserted into a certain layer, it needs to simultaneously catch the water that may leak from all the heat exchange tubes in this layer, so the length of the water isolation device b should be greater than the width of the tubular heat exchanger.

[0059] In the embodiment of the present application, the water isolation device b is placed in different layers within the leakage drain, and then the first inserted volume of water flowing at the bottom of the tubular heat exchanger after the water isolation device b is placed in different layers is detected. If the leakage point is above the water isolation device b, the water isolation device will catch the water leaking from the leakage point, and there will be a large difference between the first inserted volume and the total volume; if the leakage point is below the water isolation device b, the water isolation device will not catch the water leaking from the leakage point, and there will be little difference between the first inserted volume and the total volume. Therefore, by comparing the first inserted volume and the total volume when the water isolation device b is in different layers, the layer where the leakage point is located can be determined.

[0060] Step 2: Move the water isolation device so that the heat exchange tubes in different columns within the leakage layer are above the water isolation device, obtain the second inserted volume of water flowing at the bottom of the tubular heat exchanger after the movement, and determine the column where the leakage point is located according to the total volume and the second inserted volume.

[0061] In the embodiment of the present application, after determining the leakage layer, continue to move the water isolation device. During the movement, different columns of heat exchange tubes within the leakage layer should be above the water isolation device. If the leakage point is on the heat exchange tube within the leakage layer above the water isolation device, the water leaking from the leakage point will be caught by the water isolation device, and there will be an obvious change in the second inserted volume of water flowing at the bottom of the tubular heat exchanger compared to the total volume; if the leakage point is on the heat exchange tube within the leakage layer below the water isolation device, the water leaking from the leakage point will not be caught by the water isolation device, and there will be little difference between the second inserted volume of water flowing at the bottom of the tubular heat exchanger and the total volume. Therefore, according to the comparison result of the total volume and the second inserted volume, the column where the leakage point is located can be determined.

[0062] Among them, in order to make different columns of heat exchange tubes within the leakage layer above the water isolation device, the water isolation device can be inserted into the leakage layer, and then gradually pulled out along the width direction of the tubular heat exchanger. After pulling out a certain length each time, a part of the heat exchange tubes within the leakage layer is directly above the water isolation device, and the other part of the heat exchange tubes is not directly above the water isolation device.

[0063] Optionally, the first step includes:

[0064] Move the water isolation device to the initial layer, obtain the first inserted volume of water flowing at the bottom of the tubular heat exchanger, and calculate the first difference between the total volume and the first inserted volume.

[0065] If the first difference is greater than the preset difference threshold, move the water isolation device upward to the upper layer of the initial layer until the corresponding first difference is less than or equal to the difference threshold when the water isolation device is in the first target layer, and the corresponding first difference is greater than the difference threshold when the water isolation device is in the lower layer of the first target layer, then determine that the leakage point is in the first target layer.

[0066] In an embodiment of the present application, one layer can be selected from multiple layers of heat exchange tubes as the initial layer. To improve the efficiency of leak point detection, the initial layer can be the middle layer among the multiple layers. For example, if there are 10 layers of heat exchange tubes, then the middle layer is the 5th layer, that is, the initial layer can be the fifth layer.

[0067] Next, place the water isolation device in the initial layer, and calculate the change amount of the first inserted volume of the flowing water at the bottom of the tubular heat exchanger compared to the total volume, that is, the first difference. If the first difference is large, it means that the water leaked from the leak point is caught by the water isolation device, and the leak point is in one of the upper layers of the initial layer. Then move the water isolation device upward to a certain layer above the initial layer, and calculate the first difference after moving the water isolation device to the layer. If the first difference after moving is still large, then continue to move the water isolation device upward until the first difference after moving becomes small, and when the water isolation device is in the next layer of this layer, the calculated first difference is large, which means that this layer is the layer where the leak point is located.

[0068] Exemplarily, when the water isolation device is in the 5th layer, the calculated first difference is small, indicating that the leak point is in the 5th layer and its lower layers. However, when the water isolation device is in the 4th layer, the calculated first difference is large, indicating that the leak point is above the 4th layer. Therefore, it can be determined that the leak point is in the 5th layer.

[0069] In an embodiment of the present application, each time the water isolation device is moved upward to a layer, the water isolation device can be moved to the middle layer of all the upper layers of the current layer where it is located for a half-layer inspection, which can improve the efficiency of leak point detection.

[0070] Optionally, the first step further includes:

[0071] If the first difference is less than or equal to the difference threshold, move the water isolation device downward to the lower layer of the initial layer until, when the water isolation device is in the second target layer, the corresponding first difference is greater than the difference threshold, and when the water isolation device is in the upper layer of the second target layer, the corresponding first difference is less than or equal to the difference threshold, then determine that the leak point is in the upper layer of the second target layer.

[0072] In an embodiment of the present application, if the first difference is small, it means that the change in the first inserted volume compared to the total volume is not large, and the water isolation device does not catch the water leaked from the leak point. Therefore, the leak point is in the lower layer of the water isolation device. At this time, move the water isolation device downward to the lower layer of the initial layer, and then calculate the first difference after moving. If the first difference after moving is still small, it means that the leak point is even lower. Continue to move the water isolation device downward until the first difference after moving becomes large, and when the water isolation device is in the upper layer of this layer, the calculated first difference is small, which means that the upper layer of this layer is the layer where the leak point is located.

[0073] Exemplarily, when the water isolation device is at the 5th layer, the calculated first difference is relatively large, indicating that the leakage point is in the upper layer of the 5th layer. However, when the water isolation device is at the 6th layer, the calculated first difference is relatively small, indicating that the leakage point is in the 6th layer and its lower layers. Therefore, it can be determined that the leakage point is in the 6th layer.

[0074] Similarly, each time the water isolation device is moved downward to a layer, the water isolation device can be moved to the middle layer of all the layers below the current layer where it is located for a half-layer investigation, which can improve the investigation efficiency of the leakage point.

[0075] Optionally, the second step includes:

[0076] Insert the water isolation device into the leakage row at a set inclination angle so that the heat exchange tubes of the columns in front of the initial column in the leakage layer are above the water isolation device, and the heat exchange tubes of the first remaining columns are below the water isolation device. Obtain the second volume after insertion of the flowing water at the bottom of the tubular heat exchanger, and calculate the second difference between the total volume and the second volume after insertion; the first remaining columns are the columns except for the columns in front of the initial column.

[0077] If the second difference is greater than the preset difference threshold, move the water isolation device forward to the column in front of the initial column until, within the leakage layer, when the heat exchange tubes of the columns in front of the first target column are above the board and the heat exchange tubes of the second remaining columns are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, and when the heat exchange tubes of the columns in front of the second target column are above the board and the heat exchange tubes of the third remaining columns are below the water isolation device, the corresponding second difference is greater than the difference threshold, then determine that the leakage point is on the first target column.

[0078] Wherein, the second remaining columns are the columns except for the columns in front of the first target column, the third remaining columns are the columns except for the columns in front of the second target column, and the second target column is the column behind the first target column.

[0079] In the embodiment of the present application, as Figure 2 shown, the water isolation device b' can also be inserted into the leakage row obliquely so that the heat exchange tubes of different columns in the leakage layer are above the water isolation device.

[0080] Next, calculate the second difference between the second inserted volume of water flowing at the bottom of the tubular heat exchanger and the total volume when a part of the heat exchange tubes in a column within the leakage layer are above the water isolation device and another part are below the water isolation device. If the second difference is large, it indicates that the water isolation device has collected the water leaking from the leakage point, and the leakage point is within this part of the heat exchange tubes above the water isolation device and within the leakage layer. Therefore, move the water isolation device to the column in front of the column where the water isolation device was just located, reducing the number of heat exchange tubes above the water isolation device. Then calculate the second difference after the movement. If the second difference is still large, it means the leakage point is still in the front column, so continue to move the water isolation device forward and continue to reduce the number of heat exchange tubes above the water isolation device until, within the leakage layer, when the heat exchange tubes in the column in front of the first target column are above the board and the heat exchange tubes in the second remaining column are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, indicating that the leakage point is already in the first target column and its subsequent columns, and when the heat exchange tubes in the column in front of the second target column are above the board and the heat exchange tubes in the third remaining column are below the water isolation device, the corresponding second difference is greater than the difference threshold, indicating that the leakage point is in the column in front of the second target column. It can be seen that the leakage point is on the first target column.

[0081] Similarly, each time the water isolation device is moved to the front column, the water isolation device can be moved to the middle column of all the columns in front of it for a one-half column investigation, which can improve the investigation efficiency of the leakage point.

[0082] Optionally, the second step further includes:

[0083] If the second difference is less than or equal to the difference threshold, move the water isolation device to the column behind the initial column until, within the leakage layer, when the heat exchange tubes in the column in front of the third target column are above the board and the heat exchange tubes in the fourth remaining column are below the water isolation device, the corresponding second difference is greater than the difference threshold, and when the heat exchange tubes in the column in front of the fourth target column are above the board and the heat exchange tubes in the fifth remaining column are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, then determine that the leakage point is on the fourth target column.

[0084] Among them, the fourth remaining column is the column excluding the columns in front of the third target column, the fifth remaining column is the column excluding the columns in front of the fourth target column, and the fourth target column is the column in front of the third target column.

[0085] In the embodiment of the present application, if the second difference is small, it indicates that the water-blocking device has not collected the water leaked from the leakage point, and the leakage point is in the initial column and the columns behind it. Therefore, the water-blocking device is moved to the column behind, and then the second difference after the movement is calculated. If the second difference is still small, it indicates that the leakage point is still in a later column, and the water-blocking device is continuously moved to the column behind until, within the leakage layer, the heat exchange tubes in the columns in front of the third target column are above the board, and the heat exchange tubes in the fourth remaining columns are below the water-blocking device, and the corresponding second difference is greater than the difference threshold, it indicates that the leakage point is in the column in front of the third target column, and when the heat exchange tubes in the columns in front of the fourth target column are above the board and the heat exchange tubes in the fifth remaining columns are below the water-blocking device, the corresponding second difference is less than or equal to the difference threshold, it indicates that the leakage point is in the fourth target column and the columns behind it. It can be seen that the leakage point is on the fourth target column.

[0086] Similarly, each time the water-blocking device is moved to the column behind, the water-blocking device can be moved to the middle column of all the columns behind it to conduct a one-half column inspection, which can improve the inspection efficiency of the leakage point.

[0087] Optionally, if the distance between each column of heat exchange tubes and each layer of heat exchange tubes is equal, the set angle is 45 degrees.

[0088] In the embodiment of the present application, when the distance between each column of heat exchange tubes and each layer of heat exchange tubes is equal, in order to insert the water-blocking device easily, the water-blocking device can be inserted at an inclination of 45 degrees.

[0089] The method in this embodiment has a high leak detection accuracy, short time for leak detection, low labor intensity for leak detection, low risk for leak detection operations, is easy to operate, and can quickly resume the production operation of the equipment. This leak detection method is applicable to solving the problem of heat exchange tube leakage in large tubular heat exchangers, has wide popularization value, can output the technology for leak detection of large tubular heat exchangers externally, and lays a technical support for solving the problems of difficult and slow leak detection and easy rework in large tubular heat exchangers.

[0090] Based on the same inventive concept, the embodiment of the present invention also provides a device for determining the leakage point of a tubular heat exchanger Figure 3 is a structural block diagram of a device for determining the leakage point of a tubular heat exchanger provided by the embodiment of the present invention, as Figure 3 shown, the device 300 includes a first determination module 301, a second determination module 302, and a third determination module 303.

[0091] The first determination module 301 is configured to, after placing the tubular heat exchanger horizontally, fill the tubular heat exchanger with water at a set water pressure, and determine the position and total volume of the water flowing at the bottom of the tubular heat exchanger;

[0092] The second determination module 302 is configured to determine the row where the leakage point on the heat exchange tube is located according to the position of the flowing water, and record it as the leakage row;

[0093] The third determination module 303 is configured to insert a prefabricated water isolation device into the leakage drain, move the water isolation device, obtain the post-insertion volume of the water flowing at the bottom of the tubular heat exchanger after movement, and determine the column and layer where the leakage point is located according to the total volume and the post-insertion volume;

[0094] Wherein, the water isolation device is used to collect the water leaked from the leakage point.

[0095] Optionally, the third determination module 303 includes:

[0096] The first determination unit is configured to move the water isolation device to different layers, obtain the first post-insertion volume of the water flowing at the bottom of the tubular heat exchanger after movement, and determine the layer where the leakage point is located according to the total volume and the first post-insertion volume, denoted as the leakage layer;

[0097] The second determination unit is configured to move the water isolation device so that the heat exchange tubes in different columns within the leakage layer are above the water isolation device, obtain the second post-insertion volume of the water flowing at the bottom of the tubular heat exchanger after movement, and determine the column where the leakage point is located according to the total volume and the second post-insertion volume.

[0098] Optionally, the first determination unit is further configured to:

[0099] Move the water isolation device to the initial layer, obtain the first post-insertion volume of the water flowing at the bottom of the tubular heat exchanger, and calculate the first difference between the total volume and the first post-insertion volume;

[0100] If the first difference is greater than a preset difference threshold, move the water isolation device upward to the upper layer of the initial layer until the corresponding first difference is less than or equal to the difference threshold when the water isolation device is in the first target layer, and the corresponding first difference is greater than the difference threshold when the water isolation device is in the lower layer of the first target layer, then determine that the leakage point is in the first target layer.

[0101] Optionally, the first determination unit is further configured to:

[0102] If the first difference is less than or equal to the difference threshold, move the water isolation device downward to the lower layer of the initial layer until the corresponding first difference is greater than the difference threshold when the water isolation device is in the second target layer, and the corresponding first difference is less than or equal to the difference threshold when the water isolation device is in the upper layer of the second target layer, then determine that the leakage point is in the upper layer of the second target layer.

[0103] Optionally, the second determination unit is further configured to:

[0104] Insert the water isolation device into the leakage row at an inclined set angle so that the heat exchange tubes of the rows in front of the initial row in the leakage layer are above the water isolation device, and the heat exchange tubes of the first remaining rows are below the water isolation device. Obtain the second volume after insertion of the flowing water at the bottom of the tubular heat exchanger, and calculate the second difference between the total volume and the second volume after insertion; the first remaining rows are the rows except the rows in front of the initial row.

[0105] If the second difference is greater than the preset difference threshold, move the water isolation device forward to the row in front of the initial row until, in the leakage layer, when the heat exchange tubes of the rows in front of the first target row are above the board and the heat exchange tubes of the second remaining rows are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, and when the heat exchange tubes of the rows in front of the second target row are above the board and the heat exchange tubes of the third remaining rows are below the water isolation device, the corresponding second difference is greater than the difference threshold, then determine that the leakage point is on the first target row;

[0106] Wherein, the second remaining rows are the rows except the rows in front of the first target row, the third remaining rows are the rows except the rows in front of the second target row, and the second target row is the row behind the first target row.

[0107] Optionally, the second determination unit is further configured to:

[0108] If the second difference is less than or equal to the difference threshold, move the water isolation device backward to the row behind the initial row until, in the leakage layer, when the heat exchange tubes of the rows in front of the third target row are above the board and the heat exchange tubes of the fourth remaining rows are below the water isolation device, the corresponding second difference is greater than the difference threshold, and when the heat exchange tubes of the rows in front of the fourth target row are above the board and the heat exchange tubes of the fifth remaining rows are below the water isolation device, the corresponding second difference is less than or equal to the difference threshold, then determine that the leakage point is on the fourth target row;

[0109] Wherein, the fourth remaining rows are the rows except the rows in front of the third target row, the fifth remaining rows are the rows except the rows in front of the fourth target row, and the fourth target row is the row in front of the third target row.

[0110] Optionally, if the distance between each row of heat exchange tubes and each layer of heat exchange tubes is equal, the set angle is 45 degrees.

[0111] It can be understood that the device provided in the above embodiments is only illustrated by dividing the above functional modules. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0112] The embodiment of the present invention further provides an electronic device, which may include a processor and a memory, and the processor and the memory may be communicatively connected to each other through a bus or other means.

[0113] The processor can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or can be configured to implement one or more integrated circuits of the embodiments of the present application, or can also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and other chips, or combinations of the above types of chips.

[0114] The memory can include a mass storage for data or instructions. By way of example and not limitation, the memory can include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. In a suitable case, the memory can include removable or non-removable (or fixed) media. In a suitable case, the memory can be inside or outside the electronic device. In a particular embodiment, the memory can be a non-volatile solid-state memory.

[0115] In one example, the memory can be a Read Only Memory (ROM). In one example, the ROM can be a mask-programmed ROM, a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), an Electrically Rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0116] The processor reads and executes the computer program instructions stored in the memory to implement any one of the methods for determining the leakage point of the tubular heat exchanger in the above embodiments.

[0117] In one example, the electronic device can further include a communication interface and a bus. Among them, the processor, the memory, and the communication interface are connected through the bus and complete communication with each other. The communication interface is mainly used to implement communication between the various modules, devices, units, and / or devices in the embodiments of the present application. In a suitable case, the bus can include one or more buses.

[0118] In addition, in combination with the method for determining the leakage point of the tubular heat exchanger in the above embodiments, an embodiment of the present invention can provide a computer-readable storage medium to implement. Computer program instructions are stored on the computer-readable storage medium; when the computer program instructions are executed by a processor, any one of the methods for determining the leakage point of the tubular heat exchanger in the above embodiments is implemented.

[0119] Those skilled in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memories.

[0120] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0121] A method, device, equipment and medium for determining the leakage point of a tubular heat exchanger provided by an embodiment of the present invention. After the tubular heat exchanger is placed horizontally, the tubular heat exchanger is filled with water at a set water pressure, and the position and total volume of the water flowing at the bottom of the tubular heat exchanger are determined to understand the amount and position of the flowing water; according to the position of the flowing water, the row where the leakage point is located on the heat exchange tube is determined, denoted as the leakage row; a prefabricated water isolation device is inserted into the leakage row, and the water isolation device is moved. By moving the water isolation device, it is determined whether the leaked water is caught, and then the inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement is obtained. According to the total volume and the inserted volume after insertion, the column and layer where the leakage point is located are determined, so as to determine the position of the leakage point. This method can not only reduce the workload, but also be fast and accurate.

[0122] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0123] Similarly, it should be understood that, for the purpose of streamlining the present disclosure and aiding in the understanding of one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0124] It should be noted that the above embodiments are illustrative of the present invention rather than limiting the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

Claims

1. A method for determining the leakage point of a tubular heat exchanger, characterized in that, The tubular heat exchanger includes multiple rows of heat exchange tubes in the length direction, multiple columns of heat exchange tubes in the width direction, and multiple layers of heat exchange tubes in the height direction. The length direction of the heat exchange tubes is parallel to the length direction of the tubular heat exchanger. The method includes: After horizontally placing the tubular heat exchanger, filling the tubular heat exchanger with water at a set water pressure, and determining the position and total volume of the flowing water at the bottom of the tubular heat exchanger; According to the position of the flowing water, determining the row where the leakage point on the heat exchange tube is located, denoted as the leakage row; Inserting a prefabricated water isolation device into the leakage row, moving the water isolation device, obtaining the inserted volume of the flowing water at the bottom of the tubular heat exchanger after movement, and determining the column and layer where the leakage point is located according to the total volume and the inserted volume; Wherein, the water isolation device is used to collect the water leaked from the leakage point.

2. The method for determining the leakage point of the tubular heat exchanger according to claim 1, characterized in that The moving the water isolation device, obtaining the inserted volume of the flowing water at the bottom of the tubular heat exchanger after movement, and determining the column and layer where the leakage point is located according to the total volume and the inserted volume includes: Moving the water isolation device to different layers, obtaining the first inserted volume of the flowing water at the bottom of the tubular heat exchanger after movement, and determining the layer where the leakage point is located according to the total volume and the first inserted volume, denoted as the leakage layer; Moving the water isolation device so that the heat exchange tubes in different columns in the leakage layer are above the water isolation device, obtaining the second inserted volume of the flowing water at the bottom of the tubular heat exchanger after movement, and determining the column where the leakage point is located according to the total volume and the second inserted volume.

3. The method for determining the leakage point of the tubular heat exchanger according to claim 2, characterized in that, The moving the water isolation device to different layers, obtaining the first inserted volume of the flowing water at the bottom of the tubular heat exchanger after movement, and determining the layer where the leakage point is located according to the total volume and the first inserted volume includes: Moving the water isolation device to the initial layer, obtaining the first inserted volume of the flowing water at the bottom of the tubular heat exchanger, and calculating the first difference between the total volume and the first inserted volume; If the first difference is greater than a preset difference threshold, moving the water isolation device to the upper layer of the initial layer until, when the water isolation device is in the first target layer, the corresponding first difference is less than or equal to the difference threshold, and when the water isolation device is in the lower layer of the first target layer, the corresponding first difference is greater than the difference threshold, then determining that the leakage point is in the first target layer.

4. The method for determining the leakage point of the tubular heat exchanger according to claim 3, characterized in that, After calculating the first difference between the total volume and the first inserted volume, the method further includes: If the first difference is less than or equal to the difference threshold, moving the water isolation device to the lower layer of the initial layer until, when the water isolation device is in the second target layer, the corresponding first difference is greater than the difference threshold, and when the water isolation device is in the upper layer of the second target layer, the corresponding first difference is less than or equal to the difference threshold, then determining that the leakage point is in the upper layer of the second target layer.

5. The method for determining the leakage point of the tubular heat exchanger according to claim 2, characterized in that, Moving the water-blocking device so that the heat exchange tubes in different columns within the leakage layer are located above the water-blocking device, obtaining a second inserted volume of the water flowing at the bottom of the tubular heat exchanger after the movement, and determining the column where the leakage point is located based on the total volume and the second inserted volume, includes: Inserting the water-blocking device into the leakage row at a set angle of inclination so that the heat exchange tubes in the columns in front of the initial column within the leakage layer are located above the water-blocking device and the heat exchange tubes in the first remaining columns are located below the water-blocking device, obtaining the second inserted volume of the water flowing at the bottom of the tubular heat exchanger, and calculating a second difference between the total volume and the second inserted volume; the first remaining columns are the columns other than the columns in front of the initial column; If the second difference is greater than a preset difference threshold, move the water-blocking device forward to the column in front of the initial column until, within the leakage layer, when the heat exchange tubes in the columns in front of the first target column are located above the board and the heat exchange tubes in the second remaining columns are located below the water-blocking device, the corresponding second difference is less than or equal to the difference threshold, and when the heat exchange tubes in the columns in front of the second target column are located above the board and the heat exchange tubes in the third remaining columns are located below the water-blocking device, the corresponding second difference is greater than the difference threshold, then determine that the leakage point is in the first target column; Wherein, the second remaining columns are the columns other than the columns in front of the first target column, the third remaining columns are the columns other than the columns in front of the second target column, and the second target column is the column behind the first target column.

6. The method for determining the leakage point of the tubular heat exchanger according to claim 5, characterized in that, After calculating the second difference between the total volume and the second inserted volume, the method further includes: If the second difference is less than or equal to the difference threshold, move the water-blocking device backward to the column behind the initial column until, within the leakage layer, when the heat exchange tubes in the columns in front of the third target column are located above the board and the heat exchange tubes in the fourth remaining columns are located below the water-blocking device, the corresponding second difference is greater than the difference threshold, and when the heat exchange tubes in the columns in front of the fourth target column are located above the board and the heat exchange tubes in the fifth remaining columns are located below the water-blocking device, the corresponding second difference is less than or equal to the difference threshold, then determine that the leakage point is in the fourth target column; Wherein, the fourth remaining columns are the columns other than the columns in front of the third target column, the fifth remaining columns are the columns other than the columns in front of the fourth target column, and the fourth target column is the column in front of the third target column.

7. The method for determining the leakage point of the tubular heat exchanger according to claim 5, characterized in that, If the distance between each column of heat exchange tubes and each layer of heat exchange tubes is equal, the set angle is 45 degrees.

8. A device for determining the leakage point of a tubular heat exchanger, characterized in that, The tubular heat exchanger includes multiple rows of heat exchange tubes in the length direction, multiple columns of heat exchange tubes in the width direction, and multiple layers of heat exchange tubes in the height direction. The length direction of the heat exchange tubes is parallel to the length direction of the tubular heat exchanger. The device includes: A first determination module, configured to, after horizontally placing the tubular heat exchanger, fill the tubular heat exchanger with water at a set water pressure, and determine the position and total volume of the water flowing at the bottom of the tubular heat exchanger; A second determination module, configured to determine the row where the leakage point on the heat exchange tubes is located according to the position of the flowing water, and record it as the leakage row; A third determination module, configured to insert a prefabricated water isolation device into the leakage drain, move the water isolation device, obtain the volume after insertion of the water flowing at the bottom of the tubular heat exchanger after movement, and determine the column and layer where the leakage point is located according to the total volume and the volume after insertion; Wherein, the water isolation device is used to collect the water leaked from the leakage point.

9. An electronic device, characterized in that, Comprising: A memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to execute the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the method according to any one of claims 1-7.

Images