Aluminum plate-fin heat exchanger with safety device

Abstract

The invention belongs to the technical field of aluminum plate-fin heat exchangers, and particularly relates to an aluminum plate-fin heat exchanger with a safety device, the aluminum plate-fin heat exchanger comprises an aluminum plate-fin heat exchanger body, the aluminum plate-fin heat exchanger body is fixedly connected with two automatic pressure reducing pipes which are symmetrically arranged, and a three-way pipe is fixedly connected between the two automatic pressure reducing pipes; an automatic pressure relief mechanism is installed on the automatic pressure relief pipe, a third pipe opening of the three-way pipe is fixedly connected with a secondary pressure relief pipe, the other end of the secondary pressure relief pipe is fixedly connected to the aluminum plate-fin heat exchanger body, and a manual pressure relief cylinder is fixedly installed on the secondary pressure relief pipe. According to the pressure reducing device, the automatic pressure reducing mode and the manual pressure reducing mode are adopted, so that the pressure reducing purpose is achieved, the equipment failure rate is reduced, and the defect that an automatic pressure relief mechanism cannot operate under the condition of no electric power is overcome.

Description

Technical Field

[0001] The invention relates to an aluminum plate-fin heat exchanger, in particular to an aluminum plate-fin heat exchanger with a built-in safety device. Background Art

[0002] Plate-fin heat exchangers are usually composed of baffles, fins, seals, and guide vanes. Fins, guide vanes, and seals are placed between two adjacent baffles to form a sandwich, called a channel. Such sandwiches are stacked up according to different fluid patterns and brazed into a whole to form a plate bundle. The plate bundle is the core of the plate-fin heat exchanger, and it is equipped with necessary heads, pipes, supports, etc. to form a plate-fin heat exchanger. Among them, aluminum plate-fin heat exchangers are more widely used.

[0003] It is found in the prior art that in equipment equipped with a high-pressure aluminum plate-fin heat exchanger, abnormal conditions may sometimes occur, causing the pressure to rise. If the high-pressure aluminum plate-fin heat exchanger cannot be depressurized in time at this time, it may easily cause equipment failure.

[0004] In view of this, the present application designs an aluminum plate-fin heat exchanger with a built-in safety device. Summary of the invention

[0005] The main purpose of the present disclosure is to provide an aluminum plate-fin heat exchanger with a built-in safety device to effectively solve the problems raised by the inventor in the above background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] An aluminum plate-fin heat exchanger with a built-in safety device comprises an aluminum plate-fin heat exchanger body, two symmetrically arranged automatic pressure-reducing pipes are fixedly connected to the aluminum plate-fin heat exchanger body, a three-way pipe is fixedly connected between the two automatic pressure-reducing pipes, an automatic pressure relief mechanism is installed on the automatic pressure-reducing pipe, a secondary pressure-reducing pipe is fixedly connected to the third pipe opening of the three-way pipe, and the other end of the secondary pressure-reducing pipe is fixedly connected to the aluminum plate-fin heat exchanger body, and a manual pressure relief cylinder is fixedly installed on the secondary pressure-reducing pipe.

[0008] Preferably, the automatic pressure relief mechanism includes a pressure sensor, a pressure relief valve and a PLC controller, the pressure sensor and the pressure relief valve are both fixedly mounted on the automatic pressure reducing pipe, and the detection end of the pressure sensor extends into the automatic pressure reducing pipe, and the PLC controller is fixedly mounted on the aluminum plate-fin heat exchanger body.

[0009] Preferably, the pressure sensor and the pressure relief valve are both electrically connected to the PLC controller.

[0010] Preferably, the manual pressure relief cylinder is a square cylinder, and a piston is slidably installed in the manual pressure relief cylinder, the piston is square, a compression spring is fixedly connected to the side of the piston close to the secondary pressure relief pipe, and a sealing ball is fixedly connected to the other end of the compression spring, the sealing ball is slidably installed in the manual pressure relief cylinder, the side of the manual pressure relief cylinder is fixedly connected to the pressure relief pipe, and the pressure relief pipe is located between the piston and the sealing ball.

[0011] Preferably, an adjusting screw is rotatably installed on the top of the manual pressure relief cylinder, and a movable slot with a larger diameter than the adjusting screw is opened on the top of the sealing ball. The bottom end of the adjusting screw extends to the notch of the movable slot, the piston thread is installed on the adjusting screw, and the upper end of the adjusting screw is located outside the manual pressure relief cylinder and is fixedly connected to a handwheel.

[0012] Preferably, a limit ring is fixedly installed in the manual pressure relief cylinder, and the limit ring is located between the secondary pressure relief pipe and the manual pressure relief cylinder.

[0013] Preferably, a transparent window is provided on the shell of the manual pressure relief cylinder, and the transparent window corresponds to the position of the blocking ball.

[0014] In view of this, compared with the prior art, the beneficial effects of the present invention are:

[0015] (i) In the present application, the pressure sensor detects the pressure inside the aluminum plate-fin heat exchanger body in real time. If the pressure sensor detects that the pressure value is too large, it transmits a signal to the PLC controller to open the pressure relief valve, thereby exporting the pressure inside the aluminum plate-fin heat exchanger body to achieve the purpose of reducing pressure and reduce the failure rate.

[0016] (ii) In the present application, if the pressure inside the aluminum plate-fin heat exchanger body is too high, it can be observed from the transparent window that the sealing ball will slide toward the piston and the compression spring will be compressed. At this time, the hand wheel is turned to rotate the adjusting screw, and then the piston moves in the direction away from the secondary pressure reducing pipe, that is, the sealing ball will move with it until the sealing ball moves to a position between the piston and the pressure relief pipe, so that the secondary pressure reducing pipe and the pressure relief pipe form a passage, thereby discharging the pressure inside the aluminum plate-fin heat exchanger body, avoiding the disadvantage that the automatic pressure relief mechanism cannot operate when there is no electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows the structure schematic diagram of the aluminum plate-fin heat exchanger with built-in safety device provided by the present invention;

[0018] Figure 2 Shown Figure 1 Schematic diagram of the manual pressure relief cylinder and the secondary pressure relief pipe;

[0019] Figure 3Shown is a schematic diagram of the internal structure of the dynamic pressure relief cylinder.

[0020] icon:

[0021] 1- Aluminum plate-fin heat exchanger body; 2- Automatic pressure reducing pipe; 3- Three-way pipe; 4- Secondary pressure reducing pipe; 5- Pressure sensor; 6- Pressure relief valve; 7- PLC controller; 8- Manual pressure relief cylinder; 9- Piston; 10- Sealing ball; 11- Compression spring; 12- Pressure relief pipe; 13- Adjusting screw; 14- Hand wheel; 15- Limiting ring; 16- Transparent window. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-3 , the present invention provides the following embodiments:

[0024] An aluminum plate-fin heat exchanger with a built-in safety device comprises an aluminum plate-fin heat exchanger body 1, to which two symmetrically arranged automatic pressure reducing pipes 2 are fixedly connected, and a three-way pipe 3 is fixedly connected between the two automatic pressure reducing pipes 2, an automatic pressure relief mechanism is installed on the automatic pressure reducing pipes 2, a secondary pressure reducing pipe 4 is fixedly connected to the third pipe opening of the three-way pipe 3, and the other end of the secondary pressure reducing pipe 4 is fixedly connected to the aluminum plate-fin heat exchanger body 1, and a manual pressure relief cylinder 8 is fixedly installed on the secondary pressure reducing pipe 4.

[0025] Specifically, the automatic pressure relief mechanism includes a pressure sensor 5, a pressure relief valve 6 and a PLC controller 7. The pressure sensor 5 and the pressure relief valve 6 are both fixedly mounted on the automatic pressure reducing pipe 2, and the detection end of the pressure sensor 5 extends into the automatic pressure reducing pipe 2. The PLC controller 7 is fixedly mounted on the aluminum plate-fin heat exchanger body 1, and the pressure sensor 5 and the pressure relief valve 6 are both electrically connected to the PLC controller 7.

[0026] Specifically, the manual pressure relief cylinder 8 is a square cylinder, and a piston 9 is slidably installed in the manual pressure relief cylinder 8. The piston 9 is square, and a compression spring 11 is fixedly connected to the side of the piston 9 close to the secondary pressure reducing pipe 4, and a sealing ball 10 is fixedly connected to the other end of the compression spring 11. The sealing ball 10 is slidably installed in the manual pressure relief cylinder 8, and a pressure relief pipe 12 is fixedly connected to the side of the manual pressure relief cylinder 8, and the pressure relief pipe 12 is located between the piston 9 and the sealing ball 10. An adjusting screw 13 is rotatably installed on the top of the manual pressure relief cylinder 8, and a movable slot with a larger diameter than the adjusting screw 13 is opened on the top of the sealing ball 10, and the bottom end of the adjusting screw 13 extends to the notch of the movable slot, and the piston 9 is threadedly installed on the adjusting screw 13, and the upper end of the adjusting screw 13 is located outside the manual pressure relief cylinder 8 and is fixedly connected to a handwheel 14.

[0027] Specifically, a transparent window 16 is provided on the shell of the manual pressure relief cylinder 8 , and the transparent window 16 corresponds to the position of the blocking ball 10 , so that the real-time position of the blocking ball 10 can be observed conveniently.

[0028] Specifically, a limit ring 15 is fixedly installed in the manual pressure relief cylinder 8 , and the limit ring 15 is located between the secondary pressure relief pipe 4 and the manual pressure relief cylinder 8 to limit the blocking ball 10 and prevent it from sliding into the secondary pressure relief pipe 4 .

[0029] The specific implementation of this embodiment is as follows: the aluminum plate-fin heat exchanger body 1 has two decompression modes, which are divided into an automatic decompression mode and a manual decompression mode, and the two decompression modes constitute a safety device;

[0030] Automatic decompression: The pressure sensor 5 detects the pressure in the aluminum plate-fin heat exchanger body 1 in real time. If the pressure sensor 5 detects that the pressure value is too high, it transmits a signal to the PLC controller 7 to open the pressure relief valve 6, thereby deriving the pressure in the aluminum plate-fin heat exchanger body 1 to achieve the purpose of decompression and reduce the failure rate;

[0031] Manual decompression: If the pressure in the aluminum plate-fin heat exchanger body 1 is too high, it can be observed from the transparent window 16 that the sealing ball 10 will slide toward the piston 9, and the compression spring 11 will be compressed. At this time, the hand wheel 14 is turned to rotate the adjusting screw 13, and then the piston 9 moves in the direction away from the secondary pressure reducing pipe 4, that is, the sealing ball 10 will move with it, until the sealing ball 10 moves to a position between the piston 9 and the pressure relief pipe 12, so that the secondary pressure reducing pipe 4 and the pressure relief pipe 12 form a passage, thereby discharging the pressure in the aluminum plate-fin heat exchanger body 1, avoiding the disadvantage that the automatic pressure relief mechanism cannot operate when there is no electricity.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An aluminum plate-fin heat exchanger with a built-in safety device, characterized in that: The invention comprises an aluminum plate-fin heat exchanger body (1), wherein two symmetrically arranged automatic pressure reducing pipes (2) are fixedly connected to the aluminum plate-fin heat exchanger body (1), and a three-way pipe (3) is fixedly connected between the two automatic pressure reducing pipes (2), an automatic pressure relief mechanism is installed on the automatic pressure reducing pipe (2), a third pipe opening of the three-way pipe (3) is fixedly connected to a secondary pressure reducing pipe (4), and the other end of the secondary pressure reducing pipe (4) is fixedly connected to the aluminum plate-fin heat exchanger body (1), and a manual pressure relief cylinder (8) is fixedly installed on the secondary pressure reducing pipe (4).

2. The aluminum plate-fin heat exchanger with a built-in safety device according to claim 1, characterized in that: The automatic pressure relief mechanism comprises a pressure sensor (5), a pressure relief valve (6) and a PLC controller (7); the pressure sensor (5) and the pressure relief valve (6) are both fixedly mounted on the automatic pressure relief pipe (2), and the detection end of the pressure sensor (5) extends into the automatic pressure relief pipe (2); and the PLC controller (7) is fixedly mounted on the aluminum plate-fin heat exchanger body (1).

3. The aluminum plate-fin heat exchanger with a built-in safety device according to claim 2, characterized in that: The pressure sensor (5) and the pressure relief valve (6) are both electrically connected to the PLC controller (7).

4. The aluminum plate-fin heat exchanger with a built-in safety device according to claim 3, characterized in that: The manual pressure relief cylinder (8) is a square cylinder, and a piston (9) is slidably installed in the manual pressure relief cylinder (8). The piston (9) is square in shape. A compression spring (11) is fixedly connected to the side of the piston (9) close to the secondary pressure relief pipe (4), and a sealing ball (10) is fixedly connected to the other end of the compression spring (11). The sealing ball (10) is slidably installed in the manual pressure relief cylinder (8). A pressure relief pipe (12) is fixedly connected to the side of the manual pressure relief cylinder (8), and the pressure relief pipe (12) is located between the piston (9) and the sealing ball (10).

5. The aluminum plate-fin heat exchanger with a built-in safety device according to claim 4, characterized in that: An adjusting screw (13) is rotatably mounted on the top of the manual pressure relief cylinder (8); a movable slot having a diameter larger than that of the adjusting screw (13) is provided on the top of the blocking ball (10); the bottom end of the adjusting screw (13) extends to the notch of the movable slot; the piston (9) is threadedly mounted on the adjusting screw (13); and the upper end of the adjusting screw (13) is located outside the manual pressure relief cylinder (8) and is fixedly connected to a hand wheel (14).

6. The aluminum plate-fin heat exchanger with a built-in safety device according to claim 5, characterized in that: A limiting ring (15) is fixedly installed in the manual pressure relief cylinder (8), and the limiting ring (15) is located between the secondary pressure relief pipe (4) and the manual pressure relief cylinder (8).

7. The aluminum plate-fin heat exchanger with a built-in safety device according to claim 6, characterized in that: A transparent window (16) is provided on the shell of the manual pressure relief cylinder (8), and the transparent window (16) corresponds to the position of the blocking ball (10).

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