Movable U-shaped pipe tail supporting assembly

Abstract

The invention relates to a movable U-shaped pipe tail supporting assembly which comprises a vertical supporting plate, a first tail supporting plate, a second tail supporting plate, a wrapping piece, a first movable connecting mechanism and a second movable connecting mechanism. The first tail supporting plate and the second tail supporting plate are the same in structure and are each formed by splicing and spot welding a plurality of clamping strips; a plurality of evenly-distributed semicircular holes are formed in each clamping strip, the external free tail ends of the first tail supporting plate and the second tail supporting plate are welded to the wrapping piece, and the first movable connecting mechanism comprises a first positioning pipe welded to the vertical supporting plate, a first round steel piece welded to one free tail end of the wrapping piece, a second positioning pipe welded to the other free tail end of the wrapping piece and a second round steel piece welded to the other free tail end of the wrapping piece. The second movable connecting mechanism comprises a second positioning pipe welded to the vertical supporting plate and a second round steel part welded to the other free tail end of the wrapping part, and therefore the bent pipe part of the U-shaped pipe can freely stretch out and draw back to provide thermal compensation when subjected to temperature difference thermal stress.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchangers, in particular to an active U-tube tail support assembly. BACKGROUND

[0002] A heat exchanger is a device that transfers heat from a hot fluid to a cold fluid. It plays an important role in chemical industry, petroleum industry, power industry, food industry and many other industrial productions. In chemical industry, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, and are widely used.

[0003] U-tube heat exchanger is one of the heat exchangers. U-tube heat exchanger has only one tube sheet, and both ends of the tube are fixed on the same tube sheet. For U-tube heat exchanger, when the unsupported span of the heat exchange tube exceeds the maximum unsupported span of the straight tube section specified in GB / T151-2014, a support plate should be provided, and when the structure and size of the support plate are larger than the maximum unsupported span specified in the standard, a tail support device should be added to the bent tube part. Please refer to the prior art (Chinese patent ZL202221656093.X), which discloses a fixed U-tube tail support structure in the prior art for supporting the tail of a plurality of stacked U-tube heat exchangers. The tail of each U-tube heat exchanger is correspondingly sleeved with a sleeve, and each sleeve is welded and fixed with each other. It also includes a support plate provided on a fixed object, wherein the sleeve adjacent to the support plate is welded and fixed with the support plate. It also includes a binding steel band, wherein the binding steel band wraps and binds each sleeve and is welded and fixed with the adjacent sleeve. And the two free ends of the binding steel band are welded and fixed with the support plate. The defects of this fixed U-tube tail support structure are: 1. When manufacturing, the sleeve is sleeved on the heat exchange tube, and then the heat exchange tube is bent. Therefore, workers cannot observe whether there are defects in the part of the heat exchange tube covered by the sleeve after bending; 2. During the working process of the heat exchange tube, thermal stress will be generated due to the temperature difference between the tube and the shell. The fixed U-tube tail support structure in the prior art not only provides support at the tail of the bent tube, but also fixes the tail of the bent tube firmly, which cannot freely stretch and contract to provide thermal compensation. That is to say, the heat exchanger with this fixed U-tube tail support structure can only provide thermal compensation by the straight tube section of the U-tube heat exchanger, and the bent tube section cannot freely stretch and contract to provide thermal compensation.

[0004] Therefore, we need to propose an active U-tube tail support assembly to solve the above technical problems, which can not only provide better support for the tail of the bent tube of the U-tube heat exchanger, but also allow the straight tube section and the bent tube section to freely stretch and contract when thermal compensation is needed. SUMMARY

[0005] To solve the above problems, the purpose of the present application is to provide a movable U-shaped pipe tail support assembly with freely telescopic elbow section.

[0006] To achieve the above purpose, the technical solution adopted by the present application is: a movable U-shaped pipe tail support assembly, comprising: a vertical support plate, a first tail support plate, a second tail support plate, a cladding, a first movable connection mechanism and a second movable connection mechanism, the first tail support plate and the second tail support plate are structurally identical, each being composed of a plurality of clamping strips spliced and spot-welded together, each clamping strip is provided with a plurality of evenly distributed semicircular holes, and the heat exchange pipe is clamped in the circular hole formed after the splicing of adjacent two clamping strips, the outer free ends of the first tail support plate and the second tail support plate are each welded to the cladding, the first movable connection mechanism comprises a first positioning pipe welded to the vertical support plate and a first round steel piece welded to one of the free ends of the cladding, the first round steel piece is accommodated in the first positioning pipe and can move axially relative to the first positioning pipe, and the second movable connection mechanism comprises a second positioning pipe welded to the vertical support plate and a second round steel piece welded to the other free end of the cladding, the second round steel piece is accommodated in the second positioning pipe and can move axially relative to the second positioning pipe.

[0007] Preferably, the movable U-shaped pipe tail support assembly in the present application is further provided as follows: the first tail support plate and the second tail support plate are arranged at a 90° angle.

[0008] Preferably, the movable U-shaped pipe tail support assembly in the present application is further provided as follows: the first movable connection mechanism and the second movable connection mechanism are symmetrically arranged.

[0009] Preferably, the movable U-shaped pipe tail support assembly in the present application is further provided as follows: the vertical support plate, the first tail support plate, the second tail support plate, the cladding, the first movable connection mechanism and the second movable connection mechanism are all made of stainless steel material.

[0010] Preferably, the movable U-shaped pipe tail support assembly in the present application is further provided as follows: the cladding is polygonal.

[0011] Preferably, the movable U-shaped pipe tail support assembly in the present application is further provided as follows: the clamping strip is cut from a steel plate after drilling.

[0012] Preferably, the movable U-shaped pipe tail support assembly in the present application is further provided as follows: the vertical support plate is provided with a plurality of pipe holes for the heat exchange pipe to pass through.

[0013] Compared with the prior art, the application has the beneficial effects that: the movable U-shaped tube tail support assembly in the application adds the first movable connecting mechanism and the second movable connecting mechanism compared with the fixed U-shaped tube tail support assembly in the prior art, so that the elbow of the U-shaped tube can freely stretch and shrink to provide thermal compensation when the elbow is subjected to thermal stress caused by temperature difference, that is, the first round steel piece of the first movable connecting mechanism moves axially relative to the first positioning tube and the second round steel piece of the second movable connecting mechanism moves axially relative to the second positioning tube when the elbow freely stretches and shrinks. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a structural schematic view of the movable U-shaped heat exchange tube tail support assembly in the application.

[0015] Figure 2 Fig. 2 is a structural schematic view of the first tail support plate in the application.

[0016] Figure 3 Fig. 3 is a structural schematic view of the second tail support plate in the application. Figure 2 Fig. 4 is an enlarged view of part A in Fig. 3.

[0017] Figures 1 to 3 Fig. 1: 1, vertical support plate; 2, first tail support plate; 20, clamping strip; 200, semicircular hole; 201, circular hole; 3, second tail support plate; 4, cladding piece; 5, first movable connecting mechanism; 50, first positioning tube; 51, first round steel piece; 6, second movable connecting mechanism; 60, second positioning tube; 61, second round steel piece. DETAILED DESCRIPTION

[0018] The movable U-shaped heat exchange tube tail support assembly in the application is further described in detail through specific embodiments.

[0019] Reference Figures 1 to 3As shown, an active U-shaped tube tail support assembly comprises a vertical support plate 1, a first tail support plate 2, a second tail support plate 3, a cladding 4, a first active connection mechanism 5 and a second active connection mechanism 6, and the vertical support plate 1 is provided with a plurality of tube holes for heat exchange tubes to pass through. In the embodiment, the first tail support plate 2 and the second tail support plate 3 are arranged at an angle of 90°, and the cladding 4 is polygonal. The first tail support plate 2 is formed by a plurality of clamping strips 20 spliced and spot welded, the clamping strip 20 is cut after being drilled from a steel plate, each clamping strip 20 is provided with a plurality of evenly distributed semicircular holes 200, and the heat exchange tube is clamped in the circular hole 201 formed after the splicing of the adjacent two clamping strips 20. The second tail support plate 3 has the same structure as the first tail support plate 2, the outer free end of the first tail support plate 2 and the second tail support plate 3 is welded with the cladding 4, the first active connection mechanism 5 comprises a first positioning tube 50 welded with the vertical support plate 1 and a first round steel piece 51 welded with one free end of the cladding 4, the first round steel piece 51 is accommodated in the first positioning tube 50 and can move axially relative to the first positioning tube 50, and the second active connection mechanism 6 comprises a second positioning tube 60 welded with the vertical support plate 1 and a second round steel piece 61 welded with the other free end of the cladding 4, the second round steel piece 61 is accommodated in the second positioning tube 60 and can move axially relative to the second positioning tube 60. In the embodiment, the first active connection mechanism 5 and the second active connection mechanism 6 are symmetrically arranged, and the vertical support plate 1, the first tail support plate 2, the second tail support plate 3, the cladding 4, the first active connection mechanism 5 and the second active connection mechanism 6 are all made of stainless steel material, thus having good corrosion resistance.

[0020] The installation method of the active U-shaped tube tail support assembly in the application is that the U-shaped heat exchange tube is installed from inside to outside according to the mode of one layer of heat exchange tube and one layer of clamping strip, the seams between every two adjacent clamping strips are spot welded, and the outer free ends of the first tail support plate and the second tail support plate are welded with the cladding after the installation of all clamping strips is completed.

[0021] In summary, compared with the fixed U-shaped tube tail support assembly in the prior art, the active U-shaped tube tail support assembly in the application is additionally provided with the first active connection mechanism 5 and the second active connection mechanism 6, so that the bending pipe part of the U-shaped tube can freely stretch and contract to provide thermal compensation when subjected to thermal stress caused by temperature difference, that is, the first round steel piece 51 of the first active connection mechanism 5 moves axially relative to the first positioning tube 50 and the second round steel piece 61 of the second active connection mechanism 6 moves axially relative to the second positioning tube 60 when the bending pipe part freely stretches and contracts.

[0022] The above embodiments only illustrate the principles and effects of the present application and some applied embodiments, and are not used to limit the present application; it should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A movable U-tube tail support assembly characterized by: It includes vertical support plate, first tail support plate, second tail support plate, covering piece, first movable connecting mechanism and second movable connecting mechanism, the first tail support plate and the second tail support plate are structurally same, and are formed by spot welding of a plurality of clamping strips, a plurality of semicircular holes are formed on each clamping strip, heat exchange pipes are clamped in the circular holes formed by the splicing of two adjacent clamping strips, the outer free ends of the first tail support plate and the second tail support plate are welded with the covering piece, the first movable connecting mechanism includes first positioning tube welded with the vertical support plate and first round steel piece welded with one free end of the covering piece, the first round steel piece is accommodated in the first positioning tube and can move axially relative to the first positioning tube, the second movable connecting mechanism includes second positioning tube welded with the vertical support plate and second round steel piece welded with the other free end of the covering piece, the second round steel piece is accommodated in the second positioning tube and can move axially relative to the second positioning tube.

2. A movable U-tube tail piece support assembly as claimed in claim 1, characterized in that: The first tail support plate and the second tail support plate are arranged at a 90° angle.

3. A floating U-tail support assembly as in claim 1, wherein: The first movable connecting mechanism and the second movable connecting mechanism are symmetrically arranged.

4. A floating U-tail support assembly as in claim 1, wherein: The vertical support plate, the first tail support plate, the second tail support plate, the covering piece, the first movable connecting mechanism and the second movable connecting mechanism are made of stainless steel material.

5. A floating U-tail support assembly as in claim 1, wherein: The covering piece is polygonal.

6. A floating U-tail support assembly as claimed in claim 1, wherein: The clamping strip is cut from a steel plate after drilling.

7. A floating U-tail support assembly as in claim 1, wherein: The vertical support plate is provided with a plurality of pipe holes for heat exchange pipes. The vertical support plate is provided with a plurality of pipe holes for heat exchange pipes.

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