Secondary heat exchanger

Abstract

The utility model discloses a secondary heat exchanger relates to heat exchange equipment technical field, and secondary heat exchanger includes the shell, contains the heat exchange mechanism in the shell and is fixedly connected to the fixed mechanism of shell outer wall, and the heat exchange mechanism includes detachable roof, and the fixed mechanism includes fixed sheet, pull rod, support arm, limit board, crank and clamping block, and pull rod slidingly cooperates in fixed sheet, and one end of support arm is rotatably connected in pull rod, and limit board fixedly connected in the other end of support arm, and both ends of crank are rotatably connected in support arm and fixed sheet, and the heat exchange mechanism still includes heat pipe, fin and sets up the exhaust pipe on the side plate. The utility model discloses through setting fixed mechanism, and when pulling pull rod, support arm is rotary and drives limit board to compress roof under the action of crank, and then passes through clamping block locking, has solved the problem that roof is easy to loosen and fall off, and reliable, convenient operation are connected, exhaust air through exhaust pipe simultaneously, avoid air resistance, and the heat exchange efficiency has been improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to secondary heat exchangers. Background Technology

[0002] Secondary heat exchangers, as key equipment for heat energy recovery and utilization, are widely used in various industrial production and civil facilities. They include the outer shell and the heat exchange mechanism housed inside the shell, which is composed of precision components such as heat transfer tubes and fins.

[0003] To facilitate the installation, maintenance, and cleaning of the internal heat exchange mechanism, these heat exchangers are equipped with removable top plates or inspection covers. These top plates are usually fixed with bolts or simple clip structures. During actual operation, heat exchangers are subjected to fluid impact, equipment vibration, and frequent thermal expansion and contraction. Under these conditions, traditional bolt fixing methods may loosen, and simple clips may fail due to fatigue. Once the top plate loosens or falls off, it will not only damage the heat exchanger's sealing performance but also cause impact or damage to the internal precision heat exchange mechanism, resulting in equipment downtime and significant economic losses.

[0004] Therefore, this utility model proposes a secondary heat exchanger to overcome the shortcomings of the prior art. Utility Model Content

[0005] In the existing technology, the top plate of secondary heat exchangers is mostly fixed with bolts or simple clips, which has low connection reliability under vibration or thermal expansion and contraction conditions, and is prone to loosening and falling off, thus causing damage to the internal heat exchange mechanism. The present invention aims to provide a secondary heat exchanger with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a secondary heat exchanger, including: a shell, a heat exchange mechanism housed in the inner cavity of the shell, the heat exchange mechanism including a top plate detachably covered on the top of the shell and a fixing mechanism.

[0007] In this case, the fixing mechanism is fixedly connected to the outer wall of the outer shell.

[0008] The fixing mechanism includes a fixing plate, a pull rod, a support arm, a limiting plate, a crank, and a locking block. The fixing plate is fixed to the outer shell and has a sliding groove and a limiting hole. The pull rod is slidably engaged in the sliding groove of the fixing plate. One end of the support arm is rotatably connected to the pull rod. The limiting plate is fixedly connected to the other end of the support arm and is used to abut against the top plate. One end of the crank is rotatably connected to the support arm, and the other end of the crank is rotatably connected to the fixing plate. The locking block is pluggably engaged in the limiting hole.

[0009] Preferably, the heat exchange mechanism further includes fins and heat transfer tubes. The fins are attached to the outer surface of the heat transfer tubes, and the two are disposed together in the inner cavity of the shell. This combination structure of fins and heat transfer tubes can significantly increase the contact area with the air in the inner cavity of the shell, thereby enhancing the heat exchange effect.

[0010] Preferably, based on the above, the heat exchange mechanism further includes at least one side plate and a welding layer. The ends of the heat transfer tube and the fins are connected to the side plate through the welding layer, and the side plate is fixed to the inner wall of the outer shell, providing a stable mounting base for the heat transfer tube and the fins.

[0011] Preferably, in order to remove air from the inner cavity of the outer shell in a timely manner and prevent air resistance, the heat exchange mechanism further includes an exhaust pipe, which is disposed through the side plate, with one end of the exhaust pipe connected to the inner cavity of the outer shell and the other end extending to the outside of the outer shell.

[0012] Preferably, in order to achieve precise positioning and installation of the top plate, the top opening edge of the outer shell is provided with a groove, the top plate is fitted into the groove, and the limiting plate of the fixing mechanism abuts against the top wall of the top plate outside the groove, ensuring the effective application of the clamping force.

[0013] Preferably, as a specific linkage layout, the lower end of the support arm is rotatably connected to the upper end of the pull rod, the limiting plate is fixedly connected to the upper end of the support arm, and one end of the crank is rotatably connected to the middle position of the support arm, which helps to form an efficient lever transmission.

[0014] Preferably, in order to achieve reliable locking, the locking block is specifically a pin. After the limiting plate presses the top plate, the pin is inserted into the limiting hole, and one end of the locking block abuts against the side of the pull rod. Through this mechanical limiting method, the pull rod is effectively restricted from sliding upward and resetting, thereby ensuring the self-locking state of the fixing mechanism.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model, through a fixing mechanism including a fixing plate, a pull rod, a support arm, a limiting plate, a crank, and a locking block, solves the problems of insufficient connection reliability of the heat exchanger top plate and easy loosening and falling off, which leads to damage to the internal structure in the prior art. It achieves the effect of firmly locking the top plate, convenient operation, and protection of the internal structure.

[0017] 2. This utility model solves the problem in the prior art that air easily accumulates inside the heat exchanger shell, forming air resistance and thus reducing heat exchange efficiency by setting an exhaust pipe on the side plate of the heat exchange mechanism and connecting the exhaust pipe to the inner cavity of the shell. It achieves timely discharge of air from the cavity, eliminates air resistance, and ensures heat exchange efficiency.

[0018] 3. This utility model solves the problem of insufficient air-side heat transfer area and limited heat transfer efficiency in the prior art by setting a heat exchange core composed of heat transfer tubes and fins attached to the outer surface of the heat transfer tubes. It achieves the effect of greatly expanding the air-side heat transfer area, strengthening heat transfer, and improving the overall heat exchange efficiency of the machine. Attached Figure Description

[0019] Figure 1 This is a perspective view of the secondary heat exchanger proposed in this utility model;

[0020] Figure 2 This is a side view of the secondary heat exchanger proposed in this utility model;

[0021] Figure 3 This is an exploded view of the structure of the secondary heat exchanger proposed in this utility model;

[0022] Figure 4 This is a partial structural exploded view of the secondary heat exchanger proposed in this utility model.

[0023] Legend:

[0024] 1. Outer shell; 2. Heat exchange mechanism; 201. Top plate; 202. Fins; 203. Heat transfer tube; 204. Welded layer; 205. Side plate; 206. Exhaust pipe; 3. Fixing mechanism; 301. Limiting plate; 302. Support arm; 303. Crank; 304. Pull rod; 305. Locking block; 306. Fixing plate; 307. Limiting hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Example:

[0027] Please refer to Figures 1 to 4This utility model provides a secondary heat exchanger, which aims to solve the problems in the prior art such as insufficient connection reliability of the heat exchanger top plate 201 which is easy to loosen and fall off, and the easy accumulation of air inside the shell 1 which forms air resistance and reduces heat exchange efficiency.

[0028] like Figure 1 and Figure 2 As shown, the secondary heat exchanger includes a shell 1, a heat exchange mechanism 2 housed in the inner cavity of the shell 1, and a fixing mechanism 3 fixedly connected to the outer wall of the shell 1.

[0029] like Figure 3 As shown, the heat exchange mechanism 2 includes a top plate 201 detachably covering the top of the outer shell 1. The top opening edge of the outer shell 1 is provided with a groove, and the top plate 201 is fitted into the groove. The heat exchange mechanism 2 also includes fins 202 and heat transfer tubes 203. The fins 202 are attached to the outer surface of the heat transfer tubes 203. The heat transfer tubes 203 and fins 202 are disposed together in the inner cavity of the outer shell 1. The heat exchange mechanism 2 further includes at least one side plate 205 and a welding layer 204. The side plate 205 is fixed to the inner wall of the outer shell 1. The ends of the heat transfer tubes 203 and fins 202 are connected to the side plate 205 through the welding layer 204. The heat exchange mechanism 2 also includes an exhaust pipe 206, which is disposed through the side plate 205. One end of the exhaust pipe 206 is connected to the inner cavity of the outer shell 1 for discharging air from the cavity.

[0030] like Figure 4 As shown, the fixing mechanism 3 is used to press and lock the top plate 201. The fixing mechanism 3 includes a fixing plate 306, which is fixed to the outer wall of the outer shell 1. The fixing plate 306 has a sliding groove and a limiting hole 307. The fixing mechanism 3 includes a pull rod 304, which is slidably engaged in the sliding groove of the fixing plate 306. The fixing mechanism 3 includes a support arm 302, the lower end of which is rotatably connected to the upper end of the pull rod 304. The fixing mechanism 3 includes a limiting plate 301. 01 is fixedly connected to the upper end of the support arm 302. The limiting plate 301 is used to abut against the top plate 201 and against the top wall of the top plate 201 outside the groove. The fixing mechanism 3 includes a crank 303. One end of the crank 303 is rotatably connected to the middle position of the support arm 302, and the other end of the crank 303 is rotatably connected to the fixing plate 306. The fixing mechanism 3 also includes a locking block 305. The locking block 305 is a pin. The locking block 305 is pluggably engaged in the limiting hole 307 on the fixing plate 306.

[0031] Please refer to Figure 4The fixing mechanism 3 includes a fixing plate 306, which is fixed to the outer wall of the housing 1. The fixing plate 306 has a sliding groove and a limiting hole 307. The fixing mechanism 3 also includes a pull rod 304, which is slidably engaged in the sliding groove of the fixing plate 306. The lower end of the support arm 302 is rotatably connected to the upper end of the pull rod 304. The limiting plate 301 is fixedly connected to the upper end of the support arm 302. One end of the crank 303 is rotatably connected to the middle position of the support arm 302, and the other end of the crank 303 is rotatably connected to the fixing plate 306. The locking block 305 is a pin, which is pluggably engaged in the limiting hole 307. The fixing mechanism 3 is fixedly connected to the outer wall of the housing 1 and provides an operable linkage mechanism for locking the top plate 201. The top plate 201 of the heat exchange mechanism 2 is adapted to be embedded in the groove on the top of the housing 1.

[0032] In a preferred embodiment, in order to improve heat exchange efficiency, the heat exchange mechanism 2 includes fins 202 and heat transfer tubes 203. The fins 202 are attached to the outer surface of the heat transfer tubes 203, and the heat transfer tubes 203 and fins 202 are disposed together in the inner cavity of the outer shell 1.

[0033] In a preferred embodiment, in order to securely install the heat exchange components, the heat exchange mechanism 2 further includes at least one side plate 205 and a welding layer 204. The side plate 205 is fixed to the inner wall of the outer shell 1, and the ends of the heat transfer tube 203 and the fins 202 are connected to the side plate 205 through the welding layer 204.

[0034] In a preferred embodiment, in order to eliminate air resistance, the heat exchange mechanism 2 also includes an exhaust pipe 206, which is disposed through the side plate 205, and one end of the exhaust pipe 206 is connected to the inner cavity of the outer shell 1 for discharging air from the cavity.

[0035] In a preferred embodiment, in order to achieve precise positioning and sealing of the top plate 201, a groove is provided at the edge of the top opening of the outer shell 1, the top plate 201 is fitted into the groove, and the limiting plate 301 abuts against the top wall of the top plate 201 located outside the groove.

[0036] In a preferred embodiment, in order to achieve a specific lever arm relationship, the lower end of the support arm 302 is rotatably connected to the upper end of the pull rod 304, the limiting plate 301 is fixedly connected to the upper end of the support arm 302, and one end of the crank 303 is rotatably connected to the middle position of the support arm 302.

[0037] In a preferred embodiment, in order to reliably lock the position of the pull rod 304, the locking block 305 is specifically a pin. After the locking block 305 is inserted into the limiting hole 307, one end of the locking block 305 abuts against the side of the pull rod 304 to restrict the pull rod 304 from sliding upward and resetting.

[0038] Working principle: During heat exchange, the high-temperature medium flows inside the heat transfer tube 203. Heat is transferred through the tube wall of the heat transfer tube 203 to the fins 202 attached to the outer surface of the heat transfer tube 203. The fins 202 greatly increase the contact area with the air inside the shell 1, thereby improving the heat exchange efficiency. At the same time, the air accumulated in the inner cavity of the shell 1 is discharged through the exhaust pipe 206 that is installed through the side plate 205, thus avoiding the formation of air resistance due to air accumulation and the reduction of heat exchange effect.

[0039] When fixing the top plate 201, the operator pulls down the pull rod 304. The pull rod 304 slides in the groove of the fixing plate 306. The pull rod 304 pulls the lower end of the support arm 302 through its upper end. While the support arm 302 moves, the crank 303, which is connected to the middle position of the support arm 302 and the fixing plate 306, applies a reverse thrust to the support arm 302, causing the support arm 302 to rotate around the rotational connection point with the crank 303. The rotation drives the limiting plate 301 at the upper end of the support arm 302 to press against the top plate 201 that is fitted into the groove at the top of the outer shell 1. After the top plate 201 is pressed, the locking block 305 is inserted into the limiting hole 307 of the fixing plate 306. The locking block 305 is a pin. The locking block 305 abuts against the side of the pull rod 304, restricting the pull rod 304 from sliding upward and resetting, thereby realizing the stable locking of the top plate 201 and solving the problem of the top plate 201 being easy to loosen and fall off.

Claims

1. Secondary heat exchanger, including: The outer shell (1) and the heat exchange mechanism (2) are housed in the inner cavity of the outer shell (1) and the heat exchange mechanism (2) includes a top plate (201) that is removably covered on the top of the outer shell (1). Its features are, The secondary heat exchanger also includes a fixing mechanism (3), which is fixedly connected to the outer wall of the outer shell (1). The fixing mechanism (3) includes: a fixing plate (306), a pull rod (304), a support arm (302), a limiting plate (301), a crank (303), and a locking block (305). The fixing plate (306) is fixed to the outer shell (1). The fixing plate (306) has a sliding groove and a limiting hole (307). The pull rod (304) slides in cooperation with the fixing plate (306). In the groove of 306), one end of the support arm (302) is rotatably connected to the pull rod (304), the limiting plate (301) is fixedly connected to the other end of the support arm (302), the limiting plate (301) is used to abut against the top plate (201), one end of the crank (303) is rotatably connected to the support arm (302), the other end of the crank (303) is rotatably connected to the fixing plate (306), and the locking block (305) is pluggably engaged in the limiting hole (307).

2. The secondary heat exchanger according to claim 1, characterized in that, The heat exchange mechanism (2) further includes fins (202) and heat transfer tubes (203). The fins (202) are attached to the outer surface of the heat transfer tubes (203). The heat transfer tubes (203) and the fins (202) are disposed together in the inner cavity of the outer shell (1).

3. The secondary heat exchanger according to claim 2, characterized in that, The heat exchange mechanism (2) further includes a side plate (205) and a welding layer (204). The ends of the heat transfer tube (203) and the fins (202) are connected to the side plate (205) through the welding layer (204). The side plate (205) is fixed to the inner wall of the outer shell (1).

4. The secondary heat exchanger according to claim 3, characterized in that, The heat exchange mechanism (2) also includes an exhaust pipe (206), which is disposed through the side plate (205). One end of the exhaust pipe (206) is connected to the inner cavity of the outer shell (1) for discharging air from the cavity.

5. The secondary heat exchanger according to claim 1, characterized in that, The top opening edge of the outer shell (1) is provided with a groove, the top plate (201) is adapted to be embedded in the groove, and the limiting plate (301) abuts against the top wall of the top plate (201) located outside the groove.

6. The secondary heat exchanger according to claim 1, characterized in that, The lower end of the support arm (302) is rotatably connected to the upper end of the pull rod (304), the limiting plate (301) is fixedly connected to the upper end of the support arm (302), and one end of the crank (303) is rotatably connected to the middle position of the support arm (302).

7. The secondary heat exchanger according to claim 1 or 6, characterized in that, When the pull rod (304) slides down along the groove, the pull rod (304) pulls the support arm (302), and the crank (303) applies a reverse thrust to the support arm (302), causing the support arm (302) to rotate around its rotational connection point with the crank (303), thereby driving the limiting plate (301) to press against the top plate (201).

8. The secondary heat exchanger according to claim 1, characterized in that, The locking block (305) is a pin. After the limiting plate (301) presses the top plate (201) together, the locking block (305) is inserted into the limiting hole (307) and abuts against the side of the pull rod (304) to restrict the pull rod (304) from sliding upward and resetting.

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