Tubular heat exchanger
By introducing a detection gas system into the shell-and-tube heat exchanger, the problem of ineffective leak detection in existing technologies has been solved, enabling rapid and effective leak detection and ensuring the airtightness and safety of the heat exchanger.
Patent Information
- Application Number
- CN202520011231.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing shell-and-tube heat exchangers lack simple and effective leak detection methods, making it impossible to ensure that no leaks occur between the first and second media during heat exchange.
In a shell-and-tube heat exchanger, a gas inlet pipe and a gas outlet pipe are introduced, and a pressure detection component is provided. By detecting changes in the pressure of the gas, the leak point is determined, ensuring the airtightness of the heat exchanger.
It enables rapid and effective leak detection of shell and tube heat exchangers, ensuring the sealing and safety of the heat exchangers during normal use.
Smart Images
Figure CN223710338U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchanger technical field especially relates to a column pipe type heat exchanger that can realize leak detection. BACKGROUND
[0002] The column pipe type heat exchanger is a common heat exchanger, and its structure is shown in the figure, comprising the heat exchanger shell 4 that the first medium inlet 2 is provided with on the right end, the first medium outlet 9 is provided with on the left end, the first medium inlet is connected with the first medium inlet pipe 1, the second medium inlet is connected with the first medium discharge pipe 10, the heat exchanger shell is provided with the left side baffle 6 and the right side baffle 3, and a plurality of heat exchange pipes 5 extending along the left and right directions are distributed between the left side baffle 6 and the right side baffle 3, the tube cavity right end of the heat exchange pipe 5 is communicated with the first medium inlet, and the tube cavity left end of the heat exchange pipe is communicated with the first medium outlet. Figure 1 The left end upper side of the heat exchanger shell is provided with the second medium inlet 7, the right end lower side of the heat exchanger shell is provided with the second medium outlet 11, the second medium inlet 7 is connected with the second medium inlet pipe 8, the second medium outlet is connected with the second medium discharge pipe 12, and corresponding pipe equipment, such as filters, switch valves and the like, are arranged on the second medium inlet pipe and the second medium discharge pipe.
[0003] When in use, the second medium enters the space between the left side baffle and the right side baffle in the heat exchanger shell through the second medium inlet, and the second medium contacts the outer tube wall of the heat exchange pipe, so that the non-contact heat exchange of the first medium and the second medium is realized.
[0004] The existing column pipe type heat exchanger has the problems that the first medium and the second medium cannot contact when carrying out heat exchange, so the connection between the heat exchange pipe and the left side baffle and the right side baffle and the connection between the left side baffle and the right side baffle and the heat exchanger shell cannot have leakage points, and there is a lack of corresponding simple and effective leak detection means in the prior art. UTILITY MODEL CONTENTS
[0005] The utility model discloses a column pipe type heat exchanger that can realize leak detection.
[0006] To solve the above technical problems, the technical scheme of the column pipe type heat exchanger in the utility model is as follows:
[0007] A shell-and-tube heat exchanger comprises a heat exchanger shell provided with a first medium inlet at the right end and a first medium outlet at the left end, a left partition plate and a right partition plate arranged in the heat exchanger shell, a plurality of heat exchange tubes with the axis extending in the left-right direction distributed between the left partition plate and the right partition plate, the tube cavity right end of the heat exchange tube being communicated with the first medium inlet, the tube cavity left end of the heat exchange tube being communicated with the first medium outlet, a second medium inlet being arranged on the upper side of the left end of the heat exchanger shell, a second medium outlet being arranged on the lower side of the right end of the heat exchanger shell, a second medium inlet pipe being connected to the second medium inlet, and a second medium outlet pipe being connected to the second medium outlet, characterized in that: a detection gas inlet pipe is connected in parallel to the second medium inlet pipe, a detection gas outlet pipe is connected in parallel to the second medium outlet pipe, a medium pipe switch valve is arranged on the second medium inlet pipe and the second medium outlet pipe respectively, a detection gas switch valve is arranged on the detection gas outlet pipe and the detection gas inlet pipe respectively, and a pressure detection component is arranged on the detection gas outlet pipe and / or the detection gas inlet pipe.
[0008] Further, the detection gas inlet pipe is provided with an inlet pipe connecting flange at the end far away from the second medium inlet pipe, which is detachably connected with a compressed gas connecting pipe of the factory.
[0009] Further, the pressure detection component is a pressure gauge.
[0010] Further, the pipe diameter of the detection gas inlet pipe is smaller than that of the second medium inlet pipe, and the pipe diameter of the second medium inlet pipe matches the diameter of the second medium inlet; the pipe diameter of the detection gas outlet pipe is smaller than that of the second medium outlet pipe, and the pipe diameter of the second medium outlet pipe matches the diameter of the second medium outlet.
[0011] Further, the connection position of the detection gas inlet pipe and the second medium inlet pipe is downstream of the medium switch valve on the first medium inlet pipe.
[0012] Further, the connection position of the detection gas outlet pipe and the second medium outlet pipe is upstream of the medium switch valve on the second medium outlet pipe.
[0013] The heat exchanger has the following advantages: when the heat exchanger is used normally, the detection gas switch valve is closed, the first medium flows through the tube cavity of the heat exchange tube, and the second medium passes through the outer periphery of the heat exchange tube, so that the non-contact heat exchange of the two media is realized; when the heat exchanger needs to be checked for leakage, the medium pipe switch valve is closed, the detection gas switch valve on the detection gas inlet pipe is opened, the compressed gas of the factory enters the outer periphery of the heat exchange tube through the second medium inlet, and the pressure is maintained for a period of time, so that whether there is a leakage position between the heat exchange tube and the left partition plate and the right partition plate and between the left partition plate and the right partition plate and the heat exchanger shell is determined by whether the pressure is lost. BRIEF DESCRIPTION OF DRAWINGS
[0014] The above and other objects, features and advantages of the presently disclosed example embodiments will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation in which like reference numerals
[0015] Figure 1 is a structural schematic diagram of a tube-bank heat exchanger in the prior art of the present utility model;
[0016] Figure 2 is a structural schematic diagram of an embodiment of a tube-bank heat exchanger in the present utility model;
[0017] 1, first medium inlet pipe; 2, first medium inlet; 3, right side partition; 4, heat exchanger shell; 5, heat exchange pipe; 6, left side partition; 7, second medium inlet; 8, second medium inlet pipe; 9, first medium outlet; 10, first medium outlet pipe; 11, second medium outlet; 12, second medium outlet pipe; 13, detection gas inlet pipe; 14, pressure gauge; 15, detection gas on-off valve; 16, inlet pipe connecting flange; 17, medium pipe on-off valve; 18, filter; 19, detection gas outlet pipe. DETAILED DESCRIPTION
[0018] In order to facilitate the understanding of the present utility model, the present utility model will be described in more detail below in conjunction with the drawings and specific embodiments. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be realized in many different forms and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.
[0019] It should be noted that, unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by the person skilled in the art of the present utility model. The terms used in the specification of the present utility model are only for the purpose of describing the specific embodiments and are not intended to limit the present utility model.
[0020] An embodiment of a tube-bank heat exchanger in the present utility model is Figure 2As shown: including the right end provided with the first medium inlet, the left end provided with the first medium outlet heat exchanger shell 4, the heat exchanger shell 4 is provided with a left partition and a right partition, the left partition, the right partition is distributed with a plurality of axis along the left and right direction extending heat exchange tube, the heat exchange tube cavity right end with the first medium inlet communication, the heat exchange tube cavity left end with the first medium outlet communication, the left end of the heat exchanger shell upper side is provided with the second medium inlet, the right end of the heat exchanger shell lower side is provided with the second medium outlet, the second medium inlet is connected with the second medium inlet pipe 8, the second medium outlet is connected with the second medium discharge pipe 12. The above all belong to the prior art, here will not be described in detail.
[0021] The second medium inlet pipe 8 is connected with the detection gas inlet pipe 13 in parallel, the second medium discharge pipe is connected with the detection gas discharge pipe 19 in parallel, the second medium inlet pipe and the second medium discharge pipe are respectively provided with corresponding medium pipe switch valve 17, the detection gas discharge pipe and the detection gas inlet pipe are respectively provided with detection gas switch valve 15, and the detection gas discharge pipe and the detection gas inlet pipe are provided with pressure detection member.
[0022] The pressure detection member in the embodiment is pressure gauge 14.
[0023] The detection gas inlet pipe is provided with inlet pipe connecting flange 16 for detachable connection with the compressed gas connecting pipe of the factory at one end away from the second medium inlet pipe; the detection gas discharge pipe is provided with discharge pipe connecting flange at one end away from the second medium discharge pipe.
[0024] The pipe diameter of the detection gas inlet pipe 13 is smaller than that of the second medium inlet pipe 8, and the pipe diameter of the second medium inlet pipe matches the diameter of the second medium inlet; the pipe diameter of the detection gas discharge pipe 19 is smaller than that of the second medium discharge pipe 12, and the pipe diameter of the second medium discharge pipe matches the diameter of the second medium outlet.
[0025] The second medium inlet pipe is further provided with filter 18, and the filter 18 is located upstream of the medium switch valve on the second medium inlet pipe; the connection position of the detection gas inlet pipe and the second medium inlet pipe is located downstream of the medium switch valve on the first medium inlet pipe. The connection position of the detection gas discharge pipe and the second medium discharge pipe is upstream of the medium switch valve on the second medium discharge pipe.
[0026] In the normal use of the shell-and-tube heat exchanger, the detection gas switch valve is closed, the first medium flows through the inner cavity of the heat exchange tube, the second medium flows through the periphery of the heat exchange tube, and the two media realize non-contact heat exchange through the tube wall of the heat exchange tube. When the shell-and-tube heat exchanger needs to be leak-detected, the second medium is discharged, the detection gas inlet pipe and the detection gas outlet pipe are connected in series on the compressed gas path of the factory, the detection gas switch valve on the detection gas inlet pipe is opened, the compressed gas is injected into the peripheral area of the heat exchange tube between the left partition plate and the outer partition plate in the shell of the heat exchanger, the filter is upstream of the medium switch valve 17, and damage of the filter by high-pressure gas can be avoided. The detection gas switch valve on the detection gas inlet pipe is closed, and the pressure is maintained for a period of time. Whether the shell-and-tube heat exchanger has a leak point is judged by observing the loss of the pressure gauge. If there is a leak point, the pressure gauge will have a continuous pressure loss. After the leak detection is completed, the detection gas switch valve on the detection gas outlet pipe is opened, and the pressure gas is returned to the compressed gas path of the factory, so that the loss of compressed gas is reduced. Of course, in other embodiments of the utility model, the compressed gas can also be directly discharged into the atmosphere.
[0027] In the above description of the present specification, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected" or "connected" and the like should be understood in a broad sense. For example, as to the term "connected", it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements. Therefore, unless otherwise explicitly limited in the present specification, those skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.
[0028] According to the above description of the present specification, those skilled in the art can also understand the terms used as follows, for example, the terms indicating the orientation or positional relationship such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" are based on the orientation or positional relationship shown in the drawings of the present specification, which is only for the purpose of facilitating the description of the scheme of the utility model and simplifying the description, and is not explicitly or implicitly indicated that the devices or elements involved must have the specific orientation, be constructed and operated in the specific orientation, therefore, the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the utility model.
[0029] In addition, the terms "first" or "second" and the like used in the present specification are terms used for the purpose of description of numbering or ordinal numbers only, and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" or "second" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "a plurality of" is at least two, for example, two, three or more, and the like, unless otherwise specifically limited.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A shell-and-tube heat exchanger, comprising a heat exchanger shell provided with a first medium inlet at a right end and a first medium outlet at a left end, a left partition plate and a right partition plate arranged in the heat exchanger shell, a plurality of heat exchange tubes extending along a left-right direction and distributed between the left partition plate and the right partition plate, a lumen of the heat exchange tube in communication with the first medium inlet at a right end, and a lumen of the heat exchange tube in communication with the first medium outlet at a left end, a second medium inlet arranged on an upper side of the left end of the heat exchanger shell, and a second medium outlet arranged on a lower side of the right end of the heat exchanger shell, a second medium inlet pipe connected to the second medium inlet, and a second medium outlet pipe connected to the second medium outlet, characterized in that: The second medium inlet pipe is connected with a detection gas inlet pipe in parallel, the second medium outlet pipe is connected with a detection gas outlet pipe in parallel, the second medium inlet pipe and the second medium outlet pipe are respectively provided with corresponding medium pipe switch valves, the detection gas outlet pipe and the detection gas inlet pipe are respectively provided with detection gas switch valves, and the detection gas outlet pipe and / or the detection gas inlet pipe is provided with a pressure detection component.
2. The shell-and-tube heat exchanger according to claim 1, characterized in that: An end of the detection gas inlet pipe, which is away from the second medium inlet pipe, is provided with an inlet pipe connecting flange which is detachably connected with a compressed gas connecting pipe of the factory.
3. The shell-and-tube heat exchanger of claim 1, wherein: The pressure detection component is a pressure gauge.
4. The shell-and-tube heat exchanger of claim 1, wherein: The pipe diameter of the detection gas inlet pipe is smaller than that of the second medium inlet pipe, and the pipe diameter of the second medium inlet pipe matches the second medium inlet aperture; the pipe diameter of the detection gas outlet pipe is smaller than that of the second medium outlet pipe, and the pipe diameter of the second medium outlet pipe matches the second medium outlet aperture.
5. The shell-and-tube heat exchanger according to any one of claims 1 to 4, characterized in that: The connection position of the detection gas inlet pipe and the second medium inlet pipe is located downstream of the medium switch valve on the first medium inlet pipe.
6. The shell-and-tube heat exchanger according to any one of claims 1 to 4, characterized in that: The connection position of the detection gas outlet pipe and the second medium outlet pipe is located upstream of the medium switch valve on the second medium outlet pipe.