Winding pipe type heat exchanger with temperature measuring assembly

Abstract

A winding pipe type heat exchanger with a temperature measuring assembly comprises a shell pass cylinder, a heat exchanger, a temperature measuring assembly, a heat exchanger, a heat exchanger, a heat exchanger, a heat exchanger and a heat exchanger, and the side wall of the shell pass cylinder is provided with a temperature measuring port; the heat exchange core body is provided with a center cylinder and a plurality of heat exchange pipes, the center cylinder is arranged in the shell pass cylinder in the axial direction, and the heat exchange pipes are spirally wound around the periphery of the center cylinder from inside to outside to form a multi-layer spiral pipe; the temperature measuring assembly comprises a temperature measuring probe which is arranged in the shell pass cylinder and is located at a position to be subjected to temperature measurement in a space between the adjacent layers of spiral pipes; the input end of the lead is connected with the temperature measuring probe, and the output end of the lead penetrates through the through hole in the end cover and is located on the outer side of the end cover. According to the utility model, the temperature measurement probes are arranged at the positions to be subjected to temperature measurement between the adjacent layers of spiral pipes, and the positions to be subjected to temperature measurement can be designed as required, such as any circumferential and axial positions of the adjacent layers of spiral pipes and the corresponding layers of spiral pipes to be subjected to temperature measurement, so that the temperature of a shell pass medium near the heat exchange core body is favorably measured.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a wound tube heat exchanger with a temperature measuring component. Background Technology

[0002] Existing technologies include wound tube heat exchangers with temperature measuring components, such as the Chinese utility model patent "A Wound Tube Heat Exchanger" (application number 202323206988.0, authorization announcement number CN221444891U), which includes a heat exchanger shell, in which a tube bundle is arranged; a temperature measuring hole for inserting a thermometer is opened on the side wall of the heat exchanger shell; a temperature measuring cylinder is arranged inside the temperature measuring hole and fixed on the supporting steel ring of the tube bundle; a temperature measuring connecting pipe is fixed outside the temperature measuring hole, and the inner cavity of the temperature measuring connecting pipe, the temperature measuring hole, and the inner cavity of the temperature measuring cylinder are coaxially arranged to form a temperature measuring channel for inserting a thermometer.

[0003] The above structure avoids interference between the thermometer and the tube bundle (i.e., the heat exchange core), reducing the probability of thermometer damage and maintenance costs. However, because the thermometer is located at the temperature measuring hole, the measuring position is fixed, making it impossible to accurately measure the temperature of the shell-side medium inside the heat exchanger (especially the shell-side medium temperature near the heat exchange core). Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wound tube heat exchanger with a temperature measuring component, in order to measure the temperature of the shell-side medium near the heat exchange core, in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a wound tube heat exchanger with a temperature measuring component, comprising:

[0006] The shell-side cylinder has temperature measuring ports on its side walls;

[0007] The heat exchange core has a central cylinder arranged axially within the shell-side cylinder and multiple heat exchange tubes, each heat exchange tube being spirally wound from the inside out around the outer periphery of the central cylinder to form a multi-layer spiral tube.

[0008] Temperature sensing components;

[0009] Its features are:

[0010] The temperature measuring port is provided with an end cap to close the temperature measuring port;

[0011] The temperature measuring component includes:

[0012] A temperature probe is installed inside the shell-side cylinder and located at the temperature to be measured position in the space between adjacent spiral tube layers;

[0013] The lead wire has its input end connected to the temperature probe, and its output end passes through a perforation on the end cover and is located outside the end cover.

[0014] This invention places a temperature probe at the temperature to be measured between adjacent spiral tube layers. The temperature measurement location can be designed as needed, such as any circumferential or axial position between adjacent spiral tube layers, or the corresponding spiral tube layer to be measured. This facilitates the measurement of the shell-side medium temperature near the heat exchange core. Furthermore, because the temperature probe is located between adjacent spiral tube layers, it will not interfere with the heat exchange tubes.

[0015] Preferably, there are at least two sets of temperature measuring components.

[0016] Let two spaces in the inner and outer directions be designated as the first space and the second space. The first space and the second space are each equipped with the aforementioned temperature measuring probes, or / and the first space has at least two temperature measuring probes arranged at intervals along the axial direction, or / and the second space has at least two temperature measuring probes arranged at intervals along the axial direction.

[0017] The number of temperature sensing components and the installation position of the temperature probes in each group of temperature sensing components can be designed according to needs. This facilitates the measurement of temperature in various directions such as the axial, radial, and circumferential directions of the shell side, and is beneficial for the overall evaluation of the temperature field of the shell side medium.

[0018] Of course, there may only be one set of temperature sensing components. The number of temperature sensing components is designed according to needs.

[0019] Preferably, the shell-side cylinder has a first end, a second end, and a central portion located between the first end and the second end in the axial direction;

[0020] The temperature probe corresponds to the central part of the shell-side cylinder;

[0021] The temperature measuring port is located on the side wall of the first end of the shell-side cylinder;

[0022] The lead wire is L-shaped and has an axial section extending from its input end toward the first end of the shell-side cylinder, and a radial section extending radially outward from the end of the axial section along the heat exchange core. The outer end of the radial section serves as the output end of the lead wire.

[0023] Because the lead wire connecting the temperature probe is L-shaped, it can output the signal detected by the temperature probe while the arrangement of the lead wire is adapted to the internal structure of the heat exchanger, without affecting the flow of the shell-side medium inside the heat exchanger, thus enabling the heat exchanger to work normally.

[0024] Preferably, the axial section of the lead wire is adjacent to or attached to the heat exchange core and is constrained together with the heat exchange core.

[0025] To ensure that the axial section of the lead wire can be constrained together with the heat exchange core, preferably, the heat exchange core further includes an axially extending pad, which is located between adjacent spiral tubes and is used to support the heat exchange tubes forming the spiral tubes.

[0026] The gasket is provided with a first connector for constraining the axial section of the lead wire at a position away from the heat exchange tube.

[0027] Preferably, at least two slots are provided axially at intervals on the pad, away from the heat exchange tube. The number of the first connectors matches the number of slots. Each first connector is inserted into its corresponding slot and fixed relative to the slot. Each first connector is provided with a first through hole for the axial section of the lead wire to pass through.

[0028] In order to ensure that the axial section of the lead wire can be constrained together with the heat exchange core, it is also preferable that the end of the central cylinder extends axially relative to the spiral tube.

[0029] The axial segment is partially adjacent to or abuts the side of the end of the central cylinder, and the two are constrained together by a second connector.

[0030] Furthermore, the second connector is a U-shaped connector, and the opening of the U-shaped connector faces the side of the end of the central cylinder and is connected to the side of the end of the central cylinder. A second through hole is formed between the U-shaped connector and the side of the end of the central cylinder for the lead wire to pass through.

[0031] In the above embodiments, preferably, the edge of the temperature measuring port extends outward relative to the side wall of the shell-side cylinder;

[0032] The end cap has an outer side and an inner side. The inner side has a central region with the aforementioned perforation and a peripheral region located around the outer periphery of the central region. The central region protrudes inward relative to the peripheral region. The peripheral region is opposite to the edge of the temperature measuring port and is connected by welding.

[0033] Because the central area protrudes inward relative to the outer area, and the outer area is opposite to the edge of the temperature measuring port and connected by welding, the lead wires on the inner area can be avoided during the welding operation.

[0034] Furthermore, it also includes a support plate, disposed within the temperature measuring port and fixed relative to the end cap, with the first surface of the support plate spaced apart from the inner surface of the end cap. The support plate has support holes for the lead wire to pass through. The design of the support plate can support the lead wire and prevent it from being pulled and damaged during installation. At the same time, the support plate can also be used as a baffle to prevent the shell-side medium from entering the space between the baffle and the end cap and washing away the lead wire in the space.

[0035] In the above embodiments, preferably, a sealing element is provided on the end cap at the position corresponding to the perforation. This sealing element is sleeved over the lead wire and fits snugly against the edge of the perforation. This prevents leakage of the shell-side medium. The sealing element is preferably an existing ferrule seal.

[0036] Compared with existing technologies, the advantages of this invention are as follows: By placing the temperature probe at the temperature to be measured position between adjacent spiral tube layers, the temperature measurement position can be designed as needed, such as any circumferential or axial position between adjacent spiral tube layers, and the corresponding spiral tube layer to be measured, thus facilitating the measurement of the shell-side medium temperature near the heat exchange core. Furthermore, since the temperature probe is located between adjacent spiral tube layers, it will not interfere with the heat exchange tubes.

[0037] Because the lead wire connecting the temperature probe is L-shaped, it has an axial section extending from its input end toward the first end of the shell-side cylinder, and a radial section extending outward from the end of the axial section along the radial direction of the heat exchange core. The outer end of the radial section serves as the output end of the lead wire, passing through the perforation on the end cover and located outside the end cover. This allows the lead wire to output the signal detected by the temperature probe while the arrangement of the lead wire is adapted to the internal structure of the heat exchanger, without affecting the flow of the shell-side medium inside the heat exchanger, thus enabling the heat exchanger to operate normally. Attached Figure Description

[0038] Figure 1 This is a partial structural schematic diagram of the wound tube heat exchanger according to an embodiment of the present utility model;

[0039] Figure 2 for Figure 1 Enlarged view of section I;

[0040] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0041] Figure 4 for Figure 1 Enlarged view of section II;

[0042] Figure 5 for Figure 4 Sectional view along the BB direction. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] like Figures 1-5 As shown, this is a preferred embodiment of a wound tube heat exchanger with a temperature measuring component according to the present invention. The wound tube heat exchanger includes a shell-side cylinder 1, a heat exchange core 2, a temperature measuring component 3, an end cap 4, a support plate 5, and a sealing element 6.

[0045] The shell-side cylinder 1 is vertically arranged, and axially has a first end 1a located on the lower side, a second end (the second end is a conventional structure and not shown in the figure) located on the upper side, and a central portion 1b located between the first end 1a and the second end. A temperature measuring port 10 is provided on the side wall of the first end 1a. The edge of the temperature measuring port 10 extends outward relative to the side wall of the shell-side cylinder 1, and an end cap 4 is provided to close the temperature measuring port 10. The end cap 4 has an outer side 41 and an inner side 42. The inner side 42 has a central region 421 with perforations 40 and a peripheral region 422 located circumferentially around the central region 421. The central region 421 protrudes inward relative to the peripheral region 422. The peripheral region 422 is opposite to the edge of the temperature measuring port 10 and is connected by welding. In this embodiment, there are multiple perforations 40, which are spaced apart and penetrate the wall thickness of the end cap in the inward and outward directions. See details below. Figure 4 .

[0046] The heat exchange core 2 has a central cylinder 20 arranged axially within the shell-side cylinder 1 and multiple heat exchange tubes 21. Each heat exchange tube 21 is spirally wound from the inside out around the outer periphery of the central cylinder 20 to form a multi-layered spiral tube 210, and the lower end of each heat exchange tube 21 is supported on a lateral tube sheet 11 located on the side wall of the shell-side cylinder 1. The lower end of the central cylinder 20 extends axially downward relative to the spiral tubes 210. The heat exchange core 2 also includes axially extending spacers 22, which are located between adjacent layers of spiral tubes 210 and are used to support the heat exchange tubes 21 that form the spiral tubes 210. The mating structure between the spacers 22 and the heat exchange tubes 21 can be referred to in the prior art and will not be described in detail here.

[0047] The aforementioned temperature sensing components 3 consist of multiple sets, each set including a temperature probe (not shown in the figure, representing prior art) and a lead wire 30. The temperature probe is located inside the shell-side cylinder 1, positioned at the temperature to be measured within the space between adjacent spiral tubes 210, corresponding to the central portion 1b of the shell-side cylinder 1. The input end of the lead wire 30 is connected to the temperature probe, and the lead wire 30 is L-shaped, having an axial section 31 extending downward from its input end and a radial section 32 extending outward along the radial direction of the heat exchange core 2 from the lower end of the axial section 31. The outer end of the radial section 32 serves as the output end of the lead wire 30, passing through a perforation 40 on the end cover 4 and located outside the end cover 4. The output end of the lead wire 30 can be connected to a temperature display via a temperature converter for signal conversion.

[0048] In this embodiment, each temperature probe can be placed in the space between adjacent spiral tube layers as needed. For example, temperature probes can be placed in the space between any two adjacent spiral tube layers. The positions of the temperature probes in the axial and circumferential directions of the spiral tubes can be designed as needed. Alternatively, multiple temperature probes can be placed in the space between at least two adjacent spiral tube layers, with each temperature probe spaced apart along the axial direction.

[0049] Meanwhile, the axial section 31 of the lead wire 30 is adjacent to or abuts the heat exchange core 2 and is constrained together with the heat exchange core 2. Specifically, a first connecting member 23 for constraining the axial section 31 of the lead wire 30 is provided on the gasket 22 at a position avoiding the heat exchange tube 21. Figure 2 , 3 As shown, to constrain the first connector 23 and the gasket 22 together, the gasket 22 has multiple slots 221 spaced axially at intervals away from the heat exchange tube 21 (each slot 221 extends along the width of the gasket 22). The number of first connectors 23 matches the number of slots 221. Each first connector 23 is inserted into its corresponding slot 221 and fixed relative to the slot 221. Each first connector 23 has a first through hole 230 for the axial section 31 of the lead wire 30 to pass through (when multiple temperature probes are installed on the same layer of spiral tube, the first through hole 230 allows the lead wires connected to each temperature probe to pass through together). To further constrain the axial section 31 of the lead wire 30, each first through hole 230 has a threaded hole 231 in its wall. The shank of the self-tapping screw is threaded into the threaded hole 231 and abuts against the side of the axial section of the lead wire. Meanwhile, as... Figure 1 As shown, a portion of the axial segment 31 is adjacent to or abuts the side of the lower end of the central cylinder 20, and the two are constrained together by the second connector 24. The second connector 24 is a U-shaped connecting piece, and the opening of the U-shaped connecting piece faces the side of the end of the central cylinder 20 and is connected to the side of the end of the central cylinder 20. A second through hole is formed between the U-shaped connecting piece and the side of the end of the central cylinder 20 for the lead wires 30 to pass through (the second through hole allows all lead wires 30 to pass through together).

[0050] like Figure 4 As shown, the support plate 5 is disposed inside the temperature measuring port 10. The first surface of the support plate 5 is spaced apart from the inner surface 42 of the end cover 4. The support plate 5 is provided with a support hole 50 for the lead wire 30 to pass through. In order to fix the support plate 5 relative to the end cover 4, the support plate 5 and the end cover 4 are connected by a connecting rod 51. The first end of the connecting rod 51 is connected to the center of the first surface of the support plate 5, and the second end of the connecting rod 51 is connected to the central area 421 of the inner surface 42 of the end cover.

[0051] To prevent leakage of the shell-side medium, a sealing element 6 is provided on the end cap 4 at the position corresponding to each perforation 40. Each sealing element is sleeved on the outside of its respective lead wire 30 and fits against the edge of the corresponding perforation 40. In this embodiment, the sealing element 6 is an existing compression fitting type pipe fitting with a connector body, a ferrule, and a nut.

[0052] The wound tube heat exchanger of this embodiment can be applied to LNG / FLNG plants used in liquefied natural gas production. The temperature probes in the heat exchanger can accurately measure the shell-side medium temperature in all directions, including axial, radial, and circumferential, which is beneficial for the overall assessment of the shell-side temperature field.

[0053] In the specification and claims of this utility model, terms indicating direction, such as "upper," "lower," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0054] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

[0055] The term "radial" is also used in the specification and claims of this utility model, meaning basically along the inside and outside direction, and is not limited to the radial direction that passes through the center of the circle, but can also be slightly deviated from the radial direction.

Claims

1. A wound tube heat exchanger with a temperature sensing component, comprising: The shell-side cylinder (1) has a temperature measuring port (10) on its side wall; The heat exchange core (2) has a central cylinder (20) arranged axially inside the shell-side cylinder (1) and multiple heat exchange tubes (21). Each heat exchange tube (21) is spirally wound from the inside to the outside of the central cylinder (20) to form a multi-layer spiral tube (210). Temperature measuring component (3); Its features are: The temperature measuring port (10) is provided with an end cap (4) to close the temperature measuring port (10); The temperature measuring component (3) includes: The temperature probe is located inside the shell-side cylinder (1) and at the temperature to be measured position in the space between adjacent spiral tubes (210); The lead wire (30) has its input end connected to the temperature probe and its output end passing through the perforation (40) on the end cover (4) and located outside the end cover (4).

2. The wound tube heat exchanger according to claim 1, characterized in that: The temperature measuring component (3) has at least two sets.

3. The wound tube heat exchanger according to claim 1, characterized in that: The shell-side cylinder (1) has a first end (1a), a second end, and a central portion (1b) located between the first end (1a) and the second end in the axial direction; The temperature probe corresponds to the central part (1b) of the shell-side cylinder (1); The temperature measuring port (10) is located on the side wall of the first end (1a) of the shell-side cylinder (1); The lead wire (30) is L-shaped and has an axial section (31) extending from its input end toward the first end (1a) of the shell-side cylinder (1) and a radial section (32) extending radially outward from the end of the axial section (31) along the heat exchange core (2), the outer end of which serves as the output end of the lead wire (30).

4. The wound tube heat exchanger according to claim 3, characterized in that: The axial segment (31) of the lead wire (30) is adjacent to or attached to the heat exchange core (2) and is constrained together with the heat exchange core (2).

5. The wound tube heat exchanger according to claim 4, characterized in that: The heat exchange core (2) also includes an axially extending pad (22), which is located between adjacent spiral tubes (210) and is used to support the heat exchange tubes (21) that form the spiral tubes (210); The gasket (22) is provided with a first connector (23) for constraining the axial section (31) of the lead wire (30) at a position away from the heat exchange tube (21).

6. The wound tube heat exchanger according to claim 5, characterized in that: At least two slots (221) are provided axially at a position away from the heat exchange tube (21) on the pad (22). The number of the first connectors (23) matches the number of slots (221). Each first connector (23) is inserted into its corresponding slot (221) and fixed relative to the slot (221). Each first connector (23) is provided with a first through hole (230) for the axial section (31) of the lead wire (30) to pass through.

7. The wound tube heat exchanger according to claim 4, characterized in that: The end of the central cylinder (20) extends axially relative to the spiral tube (210); The axial segment (31) is partially adjacent to or attached to the side of the end of the central cylinder (20), and the two are constrained together by the second connector (24).

8. The wound tube heat exchanger according to claim 7, characterized in that: The second connector (24) is a U-shaped connector with the opening facing the side of the end of the central cylinder (20) and connected to the side of the end of the central cylinder (20). A second through hole is formed between the U-shaped connector and the side of the end of the central cylinder (20) for the lead wire (30) to pass through.

9. The wound tube heat exchanger according to any one of claims 1 to 8, characterized in that: The edge of the temperature measuring port (10) extends outward relative to the side wall of the shell-side cylinder (1); The end cap (4) has an outer side (41) and an inner side (42). The inner side (42) has a central region (421) with the aforementioned perforation (40) and a peripheral region (422) located circumferentially around the central region (421). The central region (421) protrudes inward relative to the peripheral region (422). The peripheral region (422) is opposite to the edge of the temperature measuring port (10) and is connected by welding.

10. The wound tube heat exchanger according to claim 9, characterized in that: It also includes a support plate (5), which is located inside the temperature measuring port (10) and fixed relative to the end cap (4). The first plate surface of the support plate (5) is spaced apart from the inner side surface (42) of the end cap (4). The support plate (5) is provided with a support hole (50) for the lead wire (30) to pass through.

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