A large temperature difference heat exchanger unit

Abstract

This utility model provides a large temperature difference heat exchanger unit, relating to the technical field of heat exchanger units. It includes a heat exchange component, with a pipe fixed to one side. A fixing component is fixed at the pipe hole of the heat exchange component, and a sleeve is fixed to the inner wall of the fixing component. Multiple arc grooves are formed on the outer circumference of the sleeve, and blind grooves are formed on both sides of the inner wall of each arc groove. A threaded component is rotatably connected to the inner wall of the blind groove via a bearing seat. A horizontal plate is threadedly connected to the surface of the threaded component, and an arc pressure plate is fixed to one side of the horizontal plate. The side of the arc pressure plate is slidably connected to the inner wall of the arc groove. This utility model achieves the effect of squeezing the pipe in the sleeve through the arc pressure plate, so that the end of the pipe fixed to the heat exchange component is fixed by the sleeve and fixing component, conforming to the vibration of the heat exchange component. This prevents damage to the connection due to vibration, prevents detachment during production, reduces the production accident rate, and improves the service life of the connection between the two components.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a large temperature difference heat exchanger. Background Technology

[0002] Large temperature difference heat exchanger units are a type of high-efficiency and energy-saving heat exchange equipment. By increasing the temperature difference between the heat source and the cold source, they significantly improve heat transfer efficiency and are widely used in heating, cooling, industrial waste heat recovery and other fields. Large temperature difference heat exchanger units include heat exchangers, circulating water pumps, valves and instruments, control systems and heat pump modules.

[0003] A search revealed that utility model patent CN219347460U discloses a large temperature difference, small flow rate heat exchanger unit, belonging to the technical field of heat exchanger units. It includes a stirable homogenizing heat exchanger, an electrical control cabinet, a circulating pump, a temperature control valve, and a mounting base. The stirable homogenizing heat exchanger is fixedly mounted on top of the mounting base. The circulating pump is connected to one end of the stirable homogenizing heat exchanger via the temperature control valve. The electrical control cabinet, circulating pump, and temperature control valve are all fixedly mounted on top of the mounting base. The circulating pump is connected to the temperature control valve via a first connecting pipe, and the temperature control valve is connected to one end of the stirable homogenizing heat exchanger via a second connecting pipe. The temperature control valve is an electric temperature control valve. The circulating pump is specifically a single-stage centrifugal pump. The stirable homogenizing heat exchanger includes a heat exchange shell, which is fixedly mounted on top of the mounting base via a bracket. The stirable homogenizing heat exchanger also includes a rotary joint. It features a large temperature difference before and after heat exchange, high heat exchange efficiency, high level of intelligence, and strong practicality.

[0004] In the above-disclosed structure, the stirable heat exchanger is connected to the second connecting pipe. However, the equipment is constantly vibrating during operation, which can easily cause misalignment between the stirable heat exchanger and the second connecting pipe. This misalignment is entirely supported by the fixed points of the two, which can easily lead to damage and loosening of the connection points, causing separation during production, resulting in production accidents and reducing the service life of the equipment. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a large temperature difference heat exchanger unit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a large temperature difference heat exchange unit, including a heat exchange component, a pipe fixed on one side of the heat exchange component, a fixing member fixed at the pipe hole of the heat exchange component, a kit fixed on the inner wall of the fixing member, a plurality of arc grooves opened on the outer circumferential surface of the kit, blind grooves opened on both sides of the inner wall of the arc grooves, a threaded component rotatably connected to the inner wall of the blind grooves through a bearing seat, a horizontal plate threadedly connected to the surface of the threaded component, an arc pressure plate fixed on one side of the horizontal plate, and the side of the arc pressure plate slidably connected to the inner wall of the arc groove.

[0007] Preferably, multiple spring sheets are linearly arrayed and fixed at the top and bottom of the inner wall of the arc groove, and slots are provided at the top and bottom of the arc pressure plate, with the inner wall of the slot nested with the surface of the spring sheet.

[0008] Preferably, an L-shaped component is fixed to the outer surface of the kit near the arc pressure plate. The inner wall of the L-shaped component is provided with a roller. The surface of the roller is wound with scale lines. One end of the scale lines is fixed to the circumference of the roller, and the other end of the scale lines is fixed with a fixing end. One end of the fixing end is fixed to the surface of the arc pressure plate.

[0009] Preferably, a driving wheel is fixed above the top roller of the L-shaped part, and a driving wheel is rotatably connected to the top of the driving wheel. A limiting groove is opened on the circumference of the driving wheel, and the inner wall of the limiting groove is in contact with the surface of the scale line.

[0010] Preferably, a stabilizing triangular piece is fixed to the bottom of the L-shaped piece, and the other side of the stabilizing triangular piece is fixed to the surface of the kit.

[0011] Preferably, an arc-shaped pressure groove is formed on one side of the arc pressure plate, and the arc-shaped pressure groove is concentric with the kit.

[0012] Preferably, the inner wall of the arc-shaped pressure groove is provided with multiple anti-slip grooves in a linear array.

[0013] Preferably, the inner wall of the arc-shaped pressure groove is provided with multiple intersecting anti-slip grooves.

[0014] Beneficial effects:

[0015] 1. This utility model realizes that the pipeline in the kit is squeezed by the arc pressure plate, so that the end of the pipeline fixed to the heat exchange component is fixed by the kit and fasteners to conform to the vibration of the heat exchange component, preventing damage to the connection caused by vibration, preventing separation during the production process, and achieving the effect of reducing the production accident rate and improving the service life of the connection between the two.

[0016] 2. This utility model achieves the effect of improving the stability of the arc pressure plate by using the nested cooperation between the spring sheet and the groove to continuously provide force feedback to the workers when the arc pressure plate enters the arc groove, while providing restriction during equipment production vibration to prevent displacement of the arc pressure plate.

[0017] 3. This utility model enables workers to pull the scale line in the L-shaped component when moving the arc pressure plate inward, and the moving wheel component keeps part of the scale line in a parallel state, making it easy for workers to read the movement distance of the arc pressure plate. This prevents excessive pressure on the pipeline from causing pipeline damage or insufficient pressure from causing poor fixing effect, thereby improving the user experience. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the arc pressure plate of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the kit of this utility model;

[0021] Figure 4 This is a cross-sectional view of the threaded component of this utility model;

[0022] Figure 5 This is a cross-sectional view of the spring sheet of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the horizontal plate of this utility model.

[0024] Legend:

[0025] 1. Heat exchange components; 101. Piping;

[0026] 2. Fasteners; 201. Kits; 202. Arc grooves; 203. Blind grooves; 204. Arc pressure plates; 205. Horizontal plates; 206. Threaded parts;

[0027] 3. Spring sheet; 301. Insert groove;

[0028] 4. L-shaped part; 401. Scale line; 402. Fixed end;

[0029] 5. Drive wheels;

[0030] 6. Secure the triangular parts;

[0031] 7. Arc-shaped groove;

[0032] 8. Anti-slip grooves. Detailed Implementation

[0033] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0034] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0036] Reference Figures 1-6A large temperature difference heat exchanger unit includes a heat exchange component 1, a circulating water pump, valves and instruments, a control system, and a heat pump module. A pipe 101 is fixed to one side of the heat exchange component 1. A fixing member 2 is fixed at the pipe hole of the heat exchange component 1. A kit 201 is fixed to the inner wall of the fixing member 2. Multiple arc grooves 202 are opened on the outer circumference of the kit 201. Blind grooves 203 are opened on both sides of the inner wall of the arc grooves 202. A threaded part 206 is rotatably connected to the inner wall of the blind grooves 203 through a bearing seat. A horizontal plate 205 is threadedly connected to the surface of the threaded part 206. An arc pressure plate 204 is fixed to one side of the horizontal plate 205. The side of the arc pressure plate 204 is slidably connected to the inner wall of the arc groove 202. The arc pressure plate 204 squeezes the pipe 101 in the kit 201, so that the end of the pipe 101 fixed to the heat exchange component 1 is fixed by the kit 201 and the fixing member 2 to conform to the vibration of the heat exchange component 1, preventing damage to the connection caused by vibration and preventing separation during the production process.

[0037] Multiple spring plates 3 are linearly arrayed and fixed at the top and bottom of the inner wall of the arc groove 202. The top and bottom of the arc pressure plate 204 are provided with grooves 301. The inner wall of the groove 301 is nested with the surface of the spring plate 3. Through the nesting and cooperation between the spring plate 3 and the groove 301, the arc pressure plate 204 continuously provides force feedback to the workers when entering the arc groove 202, and at the same time provides restriction when the equipment vibrates during production to prevent the arc pressure plate 204 from displacing.

[0038] An L-shaped component 4 is fixed to the outer surface of the kit 201 near the arc pressure plate 204. The inner wall of the L-shaped component 4 has a roller with a scale line 401 wound around its surface. One end of the scale line 401 is fixed to the circumference of the roller, and the other end is fixed to a fixing end 402. One end of the fixing end 402 is fixed to the surface of the arc pressure plate 204. A movable wheel 5 is fixed above the roller at the top of the L-shaped component 4. A movable wheel is rotatably connected to the top of the movable wheel 5. A limiting groove is formed on the circumference of the movable wheel, and the inner wall of the limiting groove fits against the surface of the scale line 401. When the operator moves the arc pressure plate 204 inward through the scale line 401, the operator can pull the scale line 401 in the L-shaped component 4. The movable wheel 5 keeps a portion of the scale line 401 parallel, facilitating the operator to read the movement distance of the arc pressure plate 204 and preventing excessive pressure on the pipe 101, which could damage the pipe 101, or insufficient pressure, which could result in poor fixing.

[0039] The bottom of the L-shaped part 4 is fixed with a stabilizing triangular part 6. The other side of the stabilizing triangular part 6 is fixed to the surface of the kit 201 to prevent the L-shaped part 4 from tilting and to improve the fixing effect.

[0040] An arc-shaped groove 7 is provided on one side of the arc pressure plate 204. The arc-shaped groove 7 is concentric with the kit 201. The arc-shaped groove 7 increases the contact area with the pipeline 101 and improves the friction.

[0041] The inner wall of the arc-shaped pressure groove 7 is linearly arrayed with multiple anti-slip grooves 8, which prevent the pipeline 101 from sliding left and right.

[0042] The inner wall of the arc-shaped pressure groove 7 is provided with multiple intersecting anti-slip grooves 8, which further increase the friction force and prevent the pipeline 101 from slipping. Specific Implementation Example 2:

[0044] Reference Figures 1-6 Workers used the structure disclosed in this utility model in a waste heat power generation system at the kiln head of a cement plant. The heat exchange components needed to operate under conditions where the flue gas temperature ranged from 420 degrees Celsius to 80 degrees Celsius, a temperature difference of up to 340 degrees Celsius. Vibration from the on-site crusher caused the traditional clamp-connected DN250 pipeline to leak on average once per quarter, with each shutdown for maintenance resulting in losses exceeding 180,000 yuan.

[0045] During implementation, the heat exchanger assembly tube holes are welded to fasteners. The kit is made of ZG230-450 cast steel (25 mm wall thickness) and connected to the fasteners using high-strength bolts. Four sets of threaded parts (40 mm chromium steel, 3 mm pitch) are symmetrically installed within the arc groove. The arc pressure plate is made of Q345R low-alloy steel (15 mm thickness). The spring sheet is made of 60% silicon 2-manganese steel (20 mm free height), with a 0.2 mm clearance fit with the arc pressure plate groove. The L-shaped component's roller has a built-in spiral spring, and the scale lines are made of 0.5 mm thick stainless steel strip (0.1 mm accuracy). The surface of the driving wheel is hard chrome plated. Cross anti-slip grooves (0.8 mm depth, 10 mm spacing) are machined within the arc-shaped pressure groove, and the stabilizing triangular parts are welded to the kit for reinforcement.

[0046] First, the fastener is welded to the outlet pipe hole of the heat exchanger assembly, and then the DN250 stainless steel pipe, already covered with a high-temperature resistant ceramic fiber pad, is inserted. The operator rotates the four sets of threaded parts clockwise, pushing the horizontal plate to radially press the arc pressure plate against the pipe. When the scale indicates a displacement of 12 mm: the third-stage spring plate embeds into the groove, producing a noticeable jerking sensation; the cross anti-slip grooves increase the pipe friction coefficient to 0.35; the spiral spring maintains a tension of 3.5 Newtons on the scale, ensuring stable readings; at this point, the contact area between the arc-shaped pressure groove and the pipe reaches 85%, with a local pressure of 2.3 MPa.

[0047] Under crusher operating conditions (vibration frequency 8 Hz, amplitude ±0.7 mm), the spring sheet absorbs 60% of the vibration energy, the displacement of the arc pressure plate is less than 0.05 mm, the anti-slip groove effectively inhibits the axial sliding of the pipeline (maximum sliding amount 0.3 mm), the self-locking structure of the threaded parts has no loosening or rotation, after 300 hours of continuous thermal shock testing (three cold and hot cycles per hour), there is no leakage at the connection, and the stress concentration coefficient at the pipe opening is reduced from 3.2 before the modification to 1.8.

[0048] During the thirteen months of operation, there were zero leaks in the pipeline, and the repeatability error of the scale line was less than 0.3 millimeters. This structure reduced the annual downtime of the heat exchange unit by 216 hours, saving economic losses of approximately 3.9 million yuan.

[0049] The working principle of this utility model is as follows: The operator first fixes the fixing part 2 to the heat exchange component 1, then installs the pipe 101 into the heat exchange component 1, and then puts the kit 201 over the pipe 101 and fixes it to the fixing part 2. Then, when the operator tightens the threaded part 206 to make the threaded connection, the horizontal plate 205 pushes the arc pressure plate 204 to move towards the inner wall of the kit 201, so that the arc pressure plate 204 contacts the pipe 101 and presses to fix the pipe 101. At the same time, the arc-shaped pressure groove 7 increases the contact area with the pipe 101, and the anti-slip groove 8 further increases the friction to prevent the pipe 101 from slipping off.

[0050] Meanwhile, the nested cooperation between the spring plate 3 and the groove 301 allows the arc pressure plate 204 to continuously provide force feedback to the operator when entering the arc groove 202, while also providing restraint during equipment vibration to prevent displacement of the arc pressure plate 204. The scale line 401 allows the operator to pull the scale line 401 in the L-shaped part 4 when moving the arc pressure plate 204 inward, and the moving wheel 5 keeps a portion of the scale line 401 in a parallel state, making it easy for the operator to read the movement distance of the arc pressure plate 204. This prevents excessive pressure on the pipe 101 from causing damage to the pipe 101 or insufficient pressure from causing poor fixing effect. At the same time, the inner wall of the winding wheel is equipped with a spiral spring. The spiral spring accumulates elastic potential energy when the scale line 401 leaves and the winding wheel rotates, so that when the operator moves the arc pressure plate 204 in the opposite direction, the spiral spring releases the elastic potential energy to reverse the winding wheel, keeping the scale line 401 taut and making it easy for the operator to read the scale.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A large temperature difference heat exchange unit, comprising a heat exchange assembly (1), wherein a pipeline (101) is fixed on one side of the heat exchange assembly (1), characterized in that: A fixing member (2) is fixed at the pipe hole of the heat exchange component (1). A kit (201) is fixed on the inner wall of the fixing member (2). Multiple arc grooves (202) are opened on the outer peripheral surface of the kit (201). Blind grooves (203) are opened on both sides of the inner wall of the arc grooves (202). A threaded part (206) is rotatably connected to the inner wall of the blind grooves (203) through a bearing seat. A horizontal plate (205) is threadedly connected to the surface of the threaded part (206). An arc pressure plate (204) is fixed on one side of the horizontal plate (205). The side of the arc pressure plate (204) is slidably connected to the inner wall of the arc groove (202).

2. The large temperature difference heat exchanger unit according to claim 1, characterized in that: Multiple spring sheets (3) are linearly arrayed and fixed at the top and bottom of the inner wall of the arc groove (202). The top and bottom of the arc pressure plate (204) are provided with grooves (301), and the inner wall of the groove (301) is nested with the surface of the spring sheet (3).

3. The large temperature difference heat exchanger unit according to claim 1, characterized in that: An L-shaped part (4) is fixed on the outer surface of the kit (201) near the arc pressure plate (204). The inner wall of the L-shaped part (4) is provided with a roller. The surface of the roller is wound with a scale line (401). One end of the scale line (401) is fixed to the circumference of the roller, and the other end of the scale line (401) is fixed with a fixing end (402). One end of the fixing end (402) is fixed to the surface of the arc pressure plate (204).

4. The large temperature difference heat exchanger unit according to claim 3, characterized in that: A movable wheel (5) is fixed above the top roller of the L-shaped part (4). The top of the movable wheel (5) is rotatably connected to a movable wheel. A limiting groove is opened on the circumference of the movable wheel. The inner wall of the limiting groove is in contact with the surface of the scale line (401).

5. A large temperature difference heat exchanger unit according to claim 3, characterized in that: The bottom of the L-shaped part (4) is fixed with a stabilizing triangular part (6), and the other side of the stabilizing triangular part (6) is fixed to the surface of the kit (201).

6. The large temperature difference heat exchanger unit according to claim 1, characterized in that: An arc-shaped groove (7) is provided on one side of the arc pressure plate (204), and the arc-shaped groove (7) is concentric with the kit (201).

7. A large temperature difference heat exchanger unit according to claim 6, characterized in that: The inner wall of the arc-shaped pressure groove (7) is linearly arrayed with multiple anti-slip grooves (8).

8. A large temperature difference heat exchanger unit according to claim 7, characterized in that: The inner wall of the arc-shaped pressure groove (7) is provided with multiple intersecting anti-slip grooves (8).

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