CN201229142Y - Detachable heat exchanger for experiment - Google Patents

Abstract

The utility model provides a detachable experimental heat exchanger, which includes a heat exchange tube and end plates at both ends of the heat exchange tube. The pressure plate is designed with tube holes, and the heat exchange tubes are inserted and passed through the tube holes of the tube plate and the pressure plate. The tube plate and the tube holes of the pressure plate are provided with ring grooves, and the tube plate and the ring groove of the pressure plate are opposite to form a sealing ring groove. , the heat exchange tube passes through the tube hole of the tube plate and the pressure plate, a sealing ring is arranged in the sealing ring groove, and the sealing ring is sleeved on the heat exchange tube. Since the heat exchanger structure expands the space of the sealing ring groove, multiple sealing rings can be arranged in the sealing ring groove or a sealing ring with a larger cross-sectional area can be used, so in addition to being convenient and detachable, it is beneficial to the experimental operation. It also has better shell-side sealing effect, better pressure resistance, safer and more reliable operation; stronger structure and lower failure rate.

Description

A detachable experimental heat exchanger

technical field

The utility model relates to heat exchanger technology, in particular to a detachable experimental heat exchanger.

Background technique

Since the 1990s, the rapid development of heat exchanger technology has brought about the improvement of energy utilization, and the successive development and application of various new heat exchangers have produced huge social and economic benefits. As the world's energy becomes increasingly tense and the global temperature continues to rise, the development of energy-saving equipment has attracted much attention, and the improvement of environmental protection requirements has brought increasingly broad application prospects for heat exchangers.

Judging from the current situation, heat exchangers are mainly developing in the direction of miniaturization, high efficiency, low consumables, and multi-purpose. At present, various research institutions at home and abroad have focused their attention on how to improve the heat transfer performance of the heat exchanger by improving the tube or shell side of the heat exchanger (such as changing the structure of the tube, installing inter-tube and tube inserts, etc.) In terms of efficiency, the improvement of the heat exchanger itself used in experimental research is ignored. At present, the shell-and-tube heat exchangers used in experimental research are basically non-detachable heat exchangers (tubes and tube sheets are expanded or welded together), the utilization rate of equipment is low, the cost of experiments is high, and the temperature difference stress between shells and tubes is large. , It is inconvenient to clean between the tubes. If the experiment is carried out with another tube type or shell-side structure, the test bench must be re-established and a new suitable heat exchanger must be designed. In order to overcome this shortcoming, a Chinese Utility Model Patent No. 200420040170.4 discloses a heat exchanger with detachable heat exchange tubes, including heat exchange tubes and end plates at both ends of the heat exchange tubes. The end plates at both ends consist of an inner end plate and an outer end plate to form a double-layer structure. The inner end plate and the outer end plate are designed with tube holes. The heat exchange tubes are inserted into and pass through the tube holes of the inner end plate. The plate is fixed; the outer side of the inner end plate is provided with a sealing ring groove outside the tube hole, the heat exchange tube is covered with a sealing ring, and the outer end plate presses the sealing ring into the sealing ring groove on the inner end plate. Although this detachable structure can achieve a detachable effect, there are still obvious defects: because it only has a sealing ring groove outside the tube hole on the outer side of the inner end plate, there is no sealing ring at the corresponding position of the outer end plate The groove is only sealed by the sealing ring squeezed by the outer end plate in the sealing ring groove, so it can only use a relatively small sealing ring, so its pressure bearing capacity is relatively low; in addition, due to the sealing ring in the sealing ring groove The space is small, so the size restriction on the sealing ring is relatively strict, and the sealing ring cannot be well sealed if there is a slight error in the size of the sealing ring; in addition, the heat exchanger of this structure does not form restrictions on the heat exchange tube in the axial direction, so its not resolved

The problem of axial movement of the heat exchange tubes at higher pressure differentials.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and provide a detachable experimental heat exchanger with simple and reasonable structure, convenient use, good pressure resistance, safe and reliable operation.

The purpose of the utility model is achieved through the following technical solutions: a detachable experimental heat exchanger, including heat exchange tubes and tube sheets at both ends of the heat exchange tubes, the tube sheets at both ends of the heat exchange tubes are composed of inner tube sheets, The outer pressure plate constitutes a double-layer structure, the tube plate and the pressure plate are designed with tube holes, and the heat exchange tubes are inserted into and pass through the tube holes of the tube plate. The tube plate and the ring groove of the pressure plate are opposite to form a sealing ring groove. The heat exchange tube passes through the tube plate and the tube hole of the pressure plate. A sealing ring is arranged in the sealing ring groove, and the sealing ring is sleeved on the heat exchange tube.

In order to ensure a better sealing effect, two O-rings can be arranged side by side in the sealing ring groove for sealing, or a single B-shaped sealing ring can be arranged in the sealing ring groove for sealing, which is compared with a single The structure of the O-ring seal has a better sealing effect and higher pressure resistance. If a better sealing effect is required, an octagonal sealing ring can be used.

In order to avoid the axial movement of the heat exchange tube under high pressure difference, the tube hole of the outer pressure plate can be set as a stepped hole, and the heat exchange tube is connected to the step in the stepped hole, and the step is tightened by the step The heat exchange tube is fixed axially to make the sealing performance more reliable.

Compared with the prior art, the utility model has the following advantages and effects: the detachable experimental heat exchanger expands the space of the sealing ring groove, so multiple sealing rings can be arranged in the sealing ring groove or a large cross-sectional area can be used. Sealing ring, so in addition to being convenient and detachable, which is beneficial to the experimental operation, it also has a better shell-side sealing effect, better pressure resistance, and safer and more reliable operation; A ladder structure is set inside, and the axial movement of the heat exchange tube under high pressure difference is avoided through the tightening effect of the ladder, so the structure of the utility model is firmer and the failure rate is lower.

Description of drawings

Fig. 1 is a schematic structural view of the detachable experimental heat exchanger of the present invention.

Fig. 2 is a schematic diagram of the sealing structure of the detachable experimental heat exchanger shown in Fig. 1 .

Fig. 3 is a schematic diagram of another sealing structure of the detachable experimental heat exchanger shown in Fig. 1 .

Fig. 4 is a schematic diagram of another sealing structure of the detachable experimental heat exchanger shown in Fig. 1 .

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example 1

Fig. 1, Fig. 2 have shown a kind of concrete structure of the present utility model, as can be seen from Fig. 1, this detachable experimental heat exchanger comprises heat exchange tube 1 and tube sheet 2 and pressure plate 3 at both ends of heat exchange tube, so The tube plate 2 and the pressure plate 3 at the two ends of the heat exchange tubes constitute a double-layer structure, and tube holes are designed on the tube plate 2 and the pressure plate 3, and the heat exchange tube 1 is inserted into and passes through the tube holes of the tube plate 2 and the pressure plate 3. Ring grooves 2-1 and 3-1 are arranged outside the tube holes of the plate 2 and the pressure plate 3, as shown in Figure 2, the tube plate 2 and the ring grooves 2-1 and 3-1 of the pressure plate 3 are opposite to form a sealing ring groove, The heat exchange tube 1 passes through the tube hole of the tube plate 2 and the pressure plate 3, and a seal ring 4 is arranged in the seal ring groove, and the seal ring 4 is sleeved on the heat exchange tube 1; the seal ring 4 is The B-shaped sealing ring, the symmetrical two sides of the B-shaped sealing ring are closely attached to the wall surfaces of the ring grooves of the tube plate 2 and the pressure plate 3 respectively.

Example 2

Fig. 3 shows another specific structure of the present utility model, as can be seen from Fig. 3, this detachable experimental heat exchanger is the same as embodiment 1 except the following features: the tube holes of the pressure plate 3 are set as stepped holes , the heat exchange tube 1 is connected to the step 3-2 in the stepped hole, and the heat exchange tube 1 is axially fixed by the action of the step 3-2; the sealing ring 4 is an octagonal sealing ring.

Example 3

Fig. 4 has shown another specific structure of the present utility model, as can be seen from Fig. 4, this detachable experimental heat exchanger is the same as embodiment 1 except the following characteristics: described sealing ring 4 is made of two O-shaped sealing rings Arranged side by side, the two O-shaped sealing rings are located in the sealing ring groove, and are closely attached to the wall surfaces of the ring grooves of the tube plate 2 and the pressure plate 3 respectively.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (5)

1, a kind of removable experiment heat exchanger, the end plate that comprises heat exchanger tube and heat exchanger tube two ends, the end plate at described heat exchanger tube two ends constitutes double-decker by tube sheet, pressing plate, design has pore on tube sheet and the pressing plate, heat exchanger tube is inserted through the pore of tube sheet and pressing plate, it is characterized in that: the pore of described tube sheet and pressing plate all is provided with annular groove outward, the relative closure gasket groove that forms of annular groove of tube sheet and pressing plate, described heat exchanger tube passes the pore of tube sheet and pressing plate, be provided with sealing ring in the described closure gasket groove, described sealing ring is socketed on the heat exchanger tube.

2, removable experiment heat exchanger according to claim 1, it is characterized in that: the pore of described pressing plate is set to stepped bore, and the ladder in described heat exchanger tube and the stepped bore is apical grafting mutually.

3, removable experiment heat exchanger according to claim 1 and 2, it is characterized in that: described sealing ring is the B V-shaped ring.

4, removable experiment heat exchanger according to claim 1 and 2, it is characterized in that: described sealing ring is the octagonal sealing ring.

5, removable experiment heat exchanger according to claim 1 and 2 is characterized in that: described sealing ring is two O-ring seals that are set up in parallel.

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