Tubular heat exchanger and cooling system

Abstract

The utility model provides a tubular heat exchanger and a cooling system, and relates to the technical field of heat exchangers. The tubular heat exchanger comprises a heat exchange tube, an elastic sealing washer, a tube plate and a locking nut, the tube plate is provided with a tube hole, one end of the heat exchange tube penetrates through the tube hole, the heat exchange tube is provided with a limiting part, the end, facing the tube plate, of the limiting part is provided with a first annular sealing end face, and the first annular sealing end face extends in the circumferential direction of the heat exchange tube; the tube plate is provided with a second annular sealing end face opposite to the first annular sealing end face, the second annular sealing end face extends in the circumferential direction of the tube hole, the heat exchange tube is sleeved with an elastic sealing gasket, the elastic sealing gasket is clamped between the first annular sealing end face and the second annular sealing end face, and the heat exchange tube is in threaded connection with the locking nut. The locking nut abuts against the end, away from the limiting part, of the tube plate. According to the tubular heat exchanger, by improving the connecting mode between the heat exchange tubes and the tube plates, the leakage probability can be reduced, and the heat exchange tubes are convenient to clean.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a tubular heat exchanger and a cooling system. Background Art

[0002] Typically, the heat exchange tubes and tube sheets in tubular heat exchangers are secured together by welding. However, in actual use, this connection method suffers from poor sealing reliability and is prone to leakage at the welds. Furthermore, scaling inside the heat exchange tubes can be difficult to clean. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and provide a tubular heat exchanger and cooling system that can reduce the probability of leakage and facilitate cleaning of the heat exchange tubes by improving the connection method between the heat exchange tubes and the tube sheets.

[0004] This application provides the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a tubular heat exchanger, comprising a heat exchange tube, an elastic sealing gasket, a tube sheet and a locking nut, the tube sheet having a tube hole, one end of the heat exchange tube being passed through the tube hole, and the heat exchange tube having a limiting portion, the limiting portion being provided with a first annular sealing end face toward one end of the tube sheet, the first annular sealing end face extending along the circumference of the heat exchange tube, the tube sheet having a second annular sealing end face opposite to the first annular sealing end face, the second annular sealing end face extending along the circumference of the tube hole, the heat exchange tube being sleeved with the elastic sealing gasket, the elastic sealing gasket being clamped between the first annular sealing end face and the second annular sealing end face, and the heat exchange tube and the locking nut being threadedly connected, the locking nut and the end of the tube sheet facing away from the limiting portion abut against each other.

[0006] In some embodiments of the first aspect, a radial seal is provided between the heat exchange tube and the tube hole.

[0007] In some embodiments of the first aspect, at least one of the tube wall of the portion of the heat exchange tube located in the tube hole and the hole wall of the tube hole is provided with a plurality of annular grooves, the plurality of annular grooves are spaced apart along the axial direction of the heat exchange tube, and elastic sealing rings are installed in the annular grooves, the elastic sealing rings respectively abut against the tube wall of the portion of the heat exchange tube located in the tube hole and the hole wall of the tube hole.

[0008] In some embodiments of the first aspect, the heat exchange tube has a large diameter axial end and a small diameter axial end, the small diameter axial end is passed through the tube hole, and a shoulder is formed between the large diameter axial end and the small diameter axial end, the shoulder constitutes the limiting portion, and the first annular sealing end face is arranged on the shoulder.

[0009] In some embodiments of the first aspect, an annular groove is provided at one end of the tube plate facing the limiting portion, the annular groove extends along the circumference of the tube hole, and the second annular sealing end face is provided at the bottom of the annular groove.

[0010] In some embodiments of the first aspect, the tube hole has a large diameter hole end and a small diameter hole end, the diameter of the large diameter hole end is larger than the outer diameter of the shaft shoulder, a hole shoulder is formed between the large diameter hole end and the small diameter hole end, and the annular groove is formed between the hole shoulder and the hole wall of the large diameter hole end.

[0011] In some embodiments of the first aspect, the elastic sealing gasket is configured as an elastic sealing flat gasket.

[0012] In some embodiments of the first aspect, a portion of the tube sheet in contact with the locking nut is provided with anti-slip grooves.

[0013] In some embodiments of the first aspect, a protrusion is provided at one end of the tube plate facing the locking nut, and the protrusion abuts against the locking nut.

[0014] In a second aspect, the present application further provides a cooling system, which includes a tubular heat exchanger as described in any one of the above embodiments.

[0015] The embodiments of the present application have the following advantages:

[0016] The present application provides a tubular heat exchanger, which greatly improves the sealing reliability through the cooperation of the first annular sealing end face and the second annular sealing end face, as well as the effect of the elastic sealing gasket. The elastic deformation of the elastic sealing gasket can make up for tiny gaps and reduce the possibility of leakage. In addition, through the design of the threaded connection and the limit part, the heat exchange tube can be easily disassembled, which is convenient for cleaning the internal scale. In other words, when it is necessary to replace the elastic sealing gasket or inspect the heat exchange tube, it can be easily achieved by removing the locking nut. Furthermore, since the elastic deformation of the elastic sealing gasket can provide a pre-tightening force to the locking nut, it can achieve an anti-slip effect, which is conducive to improving the sealing performance.

[0017] The present application also relates to a cooling system. Since the above-mentioned tubular heat exchanger has the above-mentioned technical effects, the cooling system including the tubular heat exchanger should have the same technical effects, which will not be repeated here.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of a tubular heat exchanger provided in Example 1 of the present application is shown from one perspective;

[0021] Figure 2 A schematic structural diagram of a tubular heat exchanger provided in the first embodiment of the present application from another perspective is shown;

[0022] Figure 3 Shown Figure 2 A partial enlarged view of point A in the figure.

[0023] Description of main component symbols:

[0024] 100-tubular heat exchanger; 110-tube sheet; 111-annular groove; 112-annular groove; 120-locking nut; 130-heat exchange tube; 131-large diameter shaft end; 132-shaft shoulder; 133-small diameter shaft end; 140-elastic sealing gasket; 150-elastic sealing ring. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0027] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In the related art, a tubular heat exchanger is a widely used heat exchange device, the basic principle of which is to transfer heat through heat exchange between two fluids with different temperatures inside and outside the tube.

[0031] The heat exchange tubes and tube sheets are the main components of a tubular heat exchanger, and they are fixed together by welding. However, in actual use, this connection method has poor sealing reliability and is prone to leakage at the welds. In addition, the heat exchange tubes are internally scaled, making them difficult to clean.

[0032] like Figure 1 and Figure 2As shown, in order to solve the above technical problems, an embodiment of the present application provides a tubular heat exchanger 100, which includes a heat exchange tube 130, an elastic sealing gasket 140, a tube sheet 110 and a locking nut 120. The tube sheet 110 has a tube hole, one end of the heat exchange tube 130 is passed through the tube hole, and the heat exchange tube 130 has a limiting portion. The limiting portion is provided with a first annular sealing end face at one end facing the tube sheet 110, and the first annular sealing end face extends along the circumference of the heat exchange tube 130. The tube sheet 110 has a second annular sealing end face opposite to the first annular sealing end face, and the second annular sealing end face extends along the circumference of the tube hole. The heat exchange tube 130 is sleeved with an elastic sealing gasket 140, which is clamped between the first annular sealing end face and the second annular sealing end face, and the heat exchange tube 130 is threadedly connected to the locking nut 120, and the locking nut 120 abuts against one end of the tube sheet 110 away from the limiting portion.

[0033] In these embodiments, the main feature of the tubular heat exchanger 100 is the improved connection between the heat exchange tubes 130 and the tube sheet 110, namely:

[0034] One end of the heat exchange tube 130 passes through a tube hole in the tube sheet 110, and the heat exchange tube 130 has a stopper. The heat exchange tube 130 is fitted with an elastic sealing gasket 140. The tube sheet 110 has a tube hole, and a second annular sealing end surface is provided around the tube hole. The stopper of the heat exchange tube 130, on the end facing the tube sheet 110, is provided with a first annular sealing end surface. The heat exchange tube 130 is threadedly connected to the locking nut 120, which abuts against the end of the tube sheet 110 facing away from the stopper. In other words, one end of the heat exchange tube 130 is provided with a stopper, and the end facing the tube sheet 110 is provided with a first annular sealing end surface. The tube sheet 110 has a tube hole, and a second annular sealing end surface is provided around the tube hole. The elastic sealing gasket 140 is fitted over the heat exchange tube 130 and clamped between the first and second annular sealing end surfaces to achieve a seal between the first and second annular sealing end surfaces. One end of the heat exchange tube 130 extending out of the tube hole is threadedly connected to the locking nut 120, and the locking nut 120 abuts against the tube sheet 110, thereby fixing the position of the heat exchange tube 130. It should be noted that the tube sheet 110 is clamped between the locking nut 120 and the limiting portion.

[0035] Obviously, the cooperation between the first annular sealing end face and the second annular sealing end face, as well as the action of the elastic sealing gasket 140, greatly improves the sealing reliability. The elastic deformation of the elastic sealing gasket 140 can make up for tiny gaps and reduce the possibility of leakage. Moreover, through the design of the threaded connection and the limit portion, the heat exchange tube 130 can be easily disassembled, making it easier to clean the internal scale. In other words, when it is necessary to replace the elastic sealing gasket 140 or inspect the heat exchange tube 130, this can be easily achieved by removing the locking nut 120. Furthermore, since the elastic deformation of the elastic sealing gasket 140 can provide a pre-tightening force to the locking nut 120, it can achieve an anti-slip effect, which is beneficial to improving the sealing performance.

[0036] In summary, the tubular heat exchanger 100 proposed in this application improves the connection between the heat exchange tubes 130 and the tube sheet 110, thereby enhancing sealing reliability and facilitating cleaning of the heat exchange tubes 130. This design not only solves the sealing problem in the prior art but also significantly improves the maintenance convenience and service life of the equipment.

[0037] like Figure 2 As shown, in some embodiments, a radial seal is provided between the heat exchange tube 130 and the tube hole.

[0038] In these embodiments, to improve the sealing performance of the tubular heat exchanger 100, a radial sealing method can be used to connect the heat exchange tubes 130 and the tube holes on the tube sheet 110. This method can not only enhance the sealing effect but also simplify the maintenance process.

[0039] It should be noted that radial sealing refers to a radial sealing method between the heat exchange tube 130 and the tube hole in the tube sheet 110. The sealing effect is achieved through radial compression or contact of the sealing member. One end of the heat exchange tube 130 passes through the tube hole in the tube sheet 110. The tube sheet 110 is provided with a tube hole for securing the heat exchange tube 130. A radial sealing member, such as an O-ring or lip seal, is provided between the heat exchange tube 130 and the tube hole. In other words, the O-ring is provided between the heat exchange tube 130 and the tube hole, and the O-ring generates a sealing force through compression.

[0040] In an exemplary embodiment, the heat exchange tube 130 passes through the tube hole, and an O-ring is placed in the annular groove 112 between the heat exchange tube 130 and the tube hole. Alternatively, in other embodiments, a lip seal ring is provided between the heat exchange tube 130 and the tube hole, and the lip seal ring contacts the heat exchange tube 130 through its lip surface to generate a sealing force. The heat exchange tube 130 passes through the tube hole, and the lip seal ring is placed in the annular groove 112 between the heat exchange tube 130 and the tube hole.

[0041] Obviously, the use of the radial seal, in combination with the elastic sealing gasket 140, greatly improves the sealing reliability.

[0042] like Figure 2 and Figure 3 As shown, in some embodiments, at least one of the tube wall of the heat exchange tube 130 located in the tube hole and the hole wall of the tube hole is provided with a plurality of annular grooves 112, and the plurality of annular grooves 112 are spaced apart along the axial direction of the heat exchange tube 130, and an elastic sealing ring 150 is installed in the annular groove 112, and the elastic sealing ring 150 is respectively in contact with the tube wall of the heat exchange tube 130 located in the tube hole and the hole wall of the tube hole.

[0043] In these embodiments, the following conditions exist:

[0044] 1) The tube wall is provided with a plurality of annular grooves 112, and the plurality of annular grooves 112 are spaced apart along the axial direction of the heat exchange tube 130;

[0045] 2) The tube hole is provided with a plurality of annular grooves 112, and the plurality of annular grooves 112 are spaced apart along the axial direction of the tube hole;

[0046] 3) The tube hole and the tube wall are respectively provided with a plurality of annular grooves 112 , and the plurality of annular grooves 112 are arranged at intervals along the axial direction of the tube hole.

[0047] Obviously, the above arrangement can further improve the sealing performance and reduce the probability of sealing failure.

[0048] like Figure 2 and Figure 3 As shown, in some embodiments, the heat exchange tube 130 has a large diameter axial end 131 and a small diameter axial end 133, the small diameter axial end 133 is passed through the tube hole, and a shaft shoulder 132 is formed between the large diameter axial end 131 and the small diameter axial end 133, the shaft shoulder 132 constitutes a limiting portion, and the first annular sealing end face is arranged on the shaft shoulder 132.

[0049] In these embodiments, to further enhance the sealing performance of the tubular heat exchanger 100 and simplify maintenance, the heat exchange tube 130 can be designed with a large-diameter axial end 131 and a small-diameter axial end 133. This design utilizes a shoulder 132 (i.e., a step between the large-diameter and small-diameter axial ends 131, 133) to provide a first annular sealing end surface, thereby achieving a reliable radial seal. The large-diameter axial end 131 is one end of the heat exchange tube 130 with a larger diameter. The small-diameter axial end 133 is the other end of the heat exchange tube 130 with a smaller diameter.

[0050] Specifically, a shoulder 132 is formed between the large-diameter axial end 131 and the small-diameter axial end 133 of the heat exchange tube 130, and the first annular sealing end surface is disposed on the shoulder 132. The small-diameter axial end 133 passes through the tube hole in the tube sheet 110, and the shoulder 132 forms a seal with the second annular sealing end surface on the tube sheet 110. The shoulder 132 provides a stable contact surface, increases the sealing area, and improves sealing reliability.

[0051] By adopting the heat exchange tube 130 with the shaft shoulder 132 design, and combining the radial seal and the locking device, the sealing performance of the tubular heat exchanger 100 can be significantly improved, and the maintenance process can be simplified.

[0052] like Figure 2 and Figure 3 As shown, in some embodiments, an annular groove 111 is provided at one end of the tube plate 110 facing the limiting portion. The annular groove 111 extends along the circumference of the tube hole, and the second annular sealing end surface is provided at the bottom of the annular groove 111.

[0053] In these embodiments, in order to further enhance the sealing performance of the tubular heat exchanger 100 and simplify maintenance work, the tube sheet 110 can be designed so that an annular groove 111 is provided at one end facing the limiting portion, the annular groove 111 extends along the circumference of the tube hole, and the second annular sealing end face is provided at the bottom of the annular groove 111.

[0054] Because the second annular sealing end face is disposed at the bottom of annular groove 111, elastic sealing gasket 140 is disposed within annular groove 111, forming a seal with the first annular sealing end face. The design of annular groove 111 provides a better sealing contact surface, enhancing the sealing effect, and annular groove 111 enables rapid positioning of elastic sealing gasket 140.

[0055] like Figure 2 and Figure 3 As shown, in some embodiments, the tube hole has a large diameter hole end and a small diameter hole end, the diameter of the large diameter hole end is larger than the outer diameter of the shaft shoulder 132, a hole shoulder is formed between the large diameter hole end and the small diameter hole end, and an annular groove 111 is formed between the hole shoulder and the hole wall of the large diameter hole end.

[0056] In these embodiments, since the inner side of the annular groove 111 has no groove wall and is directly connected to the pipe hole, after the elastic sealing gasket 140 is worn, the position of the locking nut 120 is adjusted to supplement the position, thereby improving the utilization rate of the elastic sealing gasket 140.

[0057] like Figure 2 and Figure 3 As shown, in some embodiments, the elastic sealing gasket 140 is configured as an elastic sealing flat gasket.

[0058] In these embodiments, the elastic sealing gasket 140 is configured as an elastic sealing flat gasket, which can reduce the contact area between the elastic sealing gasket 140 and the tube sheet 110 and the limiting portion, thereby improving the connection stability.

[0059] In some embodiments, the portion of the tube sheet 110 that contacts the locking nut is provided with anti-slip grooves.

[0060] In these embodiments, the anti-slip grooves are provided to increase the friction between the locking nut 120 and the tube sheet 110 , thereby preventing the locking nut 120 from loosening.

[0061] Exemplarily, the anti-slip pattern is a protrusion on the surface of the tube sheet 110 , or the anti-slip pattern is formed by a groove on the surface of the tube sheet 110 .

[0062] In some embodiments, a protrusion is provided at one end of the tube sheet 110 facing the locking nut, and the protrusion abuts against the locking nut.

[0063] In these embodiments, the raised portion contacts the locking nut 120, thereby increasing the thickness of the tube sheet 110 at the location where the locking nut 120 contacts the tube sheet 110, reducing the impact of wear on the tube sheet 110 during the process of disassembling and assembling the heat exchange tube 130, thereby increasing the service life of the tube sheet 110 and increasing the structural strength of the connection between the tube sheet 110 and the heat exchange tube 130.

[0064] For example, the protrusion is configured as a truncated cone on the tube plate 110 , and the tube hole passes through the truncated cone.

[0065] like Figure 1 As shown, in some embodiments, the present application further provides a cooling system, which includes the tubular heat exchanger 100 as described in any one of the above embodiments.

[0066] Since the above-mentioned tubular heat exchanger 100 has the above-mentioned technical effects, the cooling system including the tubular heat exchanger 100 should have the same technical effects, which will not be described in detail here.

[0067] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0068] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0069] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. A tubular heat exchanger, characterized in that: The tubular heat exchanger includes a heat exchange tube, an elastic sealing gasket, a tube sheet and a locking nut. The tube sheet has a tube hole, one end of the heat exchange tube is passed through the tube hole, and the heat exchange tube has a limiting portion. The limiting portion is provided with a first annular sealing end face toward one end of the tube sheet, and the first annular sealing end face extends along the circumference of the heat exchange tube. The tube sheet has a second annular sealing end face opposite to the first annular sealing end face, and the second annular sealing end face extends along the circumference of the tube hole. The heat exchange tube is sleeved with the elastic sealing gasket, and the elastic sealing gasket is clamped between the first annular sealing end face and the second annular sealing end face. The heat exchange tube and the locking nut are threadedly connected, and the locking nut abuts against one end of the tube sheet away from the limiting portion.

2. The tubular heat exchanger according to claim 1, characterized in that A radial seal is provided between the heat exchange tube and the tube hole.

3. The tubular heat exchanger according to claim 2, characterized in that: At least one of the tube wall of the portion of the heat exchange tube located in the tube hole and the hole wall of the tube hole is provided with a plurality of annular grooves, the plurality of annular grooves are spaced apart along the axial direction of the heat exchange tube, and elastic sealing rings are installed in the annular grooves, the elastic sealing rings respectively abut against the tube wall of the portion of the heat exchange tube located in the tube hole and the hole wall of the tube hole.

4. The tubular heat exchanger according to claim 1, characterized in that The heat exchange tube has a large diameter axial end and a small diameter axial end, the small diameter axial end is passed through the tube hole, and a shaft shoulder is formed between the large diameter axial end and the small diameter axial end, the shaft shoulder constitutes the limiting portion, and the first annular sealing end face is arranged on the shaft shoulder.

5. The tubular heat exchanger according to claim 4, characterized in that An annular groove is provided at one end of the tube plate facing the limiting portion. The annular groove extends along the circumference of the tube hole, and the second annular sealing end surface is provided at the bottom of the annular groove.

6. The tubular heat exchanger according to claim 5, characterized in that The tube hole has a large diameter hole end and a small diameter hole end, the diameter of the large diameter hole end is larger than the outer diameter of the shaft shoulder, a hole shoulder is formed between the large diameter hole end and the small diameter hole end, and the annular groove is formed between the hole shoulder and the hole wall of the large diameter hole end.

7. The tubular heat exchanger according to claim 6, characterized in that The elastic sealing gasket is configured as an elastic sealing flat gasket.

8. The tubular heat exchanger according to claim 1, characterized in that The portion of the tube plate that contacts the locking nut is provided with anti-slip grooves.

9. The tubular heat exchanger according to claim 1, characterized in that A protrusion is provided on one end of the tube plate facing the locking nut, and the protrusion abuts against the locking nut.

10. A cooling system, characterized in that: The cooling system comprises the tubular heat exchanger according to any one of claims 1 to 9.

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