Heat exchanger capable of exhausting gas and liquid

Abstract

The utility model relates to the technical field of heat exchangers, in particular to an exhaust and liquid discharge type heat exchanger which comprises a heat exchanger body, an exhaust pipe communicating with the top of the heat exchanger body and a liquid drainage pipe communicating with the bottom of the heat exchanger body, the exhaust pipe communicates with a liquid level pipe, and a floating block is slidably arranged in the liquid level pipe; a gap allowing air to pass through exists between the floating block and the liquid level pipe, a pressure sensor is fixedly arranged on the liquid level pipe, a controller is fixedly arranged on the heat exchanger body, the pressure sensor is electrically connected with the controller, a first opening and closing assembly is arranged on the exhaust pipe, a second opening and closing assembly is arranged on the drainage pipe, and the first opening and closing assembly is electrically connected with the controller. When the floating block abuts against the pressure sensor, the exhaust pipe is closed, and when the lyophobic pipe is opened, the exhaust pipe is opened. The automatic exhaust and drainage device has the effect of achieving automatic exhaust and drainage.

Description

Technical Field

[0001] This application relates to the technical field of heat exchangers, and in particular to a ventable and drainable heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers, also known as tube-and-tube heat exchangers, use the walls of tube bundles enclosed in a shell as the heat transfer surface. These heat exchangers are simple in structure, low in cost, have a wide flow cross-section, and are easy to clean of scale. However, they have a low heat transfer coefficient, require a large footprint, can be manufactured using various structural materials (mainly metals), and can be used under high temperature and high pressure conditions, making them the most widely used type.

[0003] Shell-and-tube heat exchangers mainly consist of a shell, heat transfer tube bundles, tube sheets, baffles, tube boxes, vents, and drain ports. When the heat exchanger starts operating, the fluid gradually fills its internal space. The vents allow air to be gradually expelled, preventing airlocks from forming. When the equipment is shut down and the liquid is drained, the vents allow air to enter the heat exchanger to balance the pressure. The drain ports allow liquid to be drained from the heat exchanger during shutdown, facilitating equipment maintenance, storage, or refilling of the working fluid.

[0004] However, in daily production, the commonly used method of discharge is to manually operate valves. With this manual method, human factors have a significant impact on production stability. It is possible that untimely discharge may affect production and the safety of heat exchangers; it is also possible that improper operation may cause work-related accidents when discharging high-temperature, corrosive or other dangerous media. Utility Model Content

[0005] To achieve automatic venting and drainage, this application provides a ventable and drainable heat exchanger.

[0006] The exhaust and liquid-draining heat exchanger provided in this application adopts the following technical solution:

[0007] A vented and drainable heat exchanger includes: a heat exchanger body, an vent pipe connected to the top of the heat exchanger body, and a drain pipe connected to the bottom of the heat exchanger body. A level pipe is connected to the vent pipe, and a float is slidably disposed in the level pipe. An air gap exists between the float and the level pipe. A pressure sensor is fixedly disposed on the level pipe. A controller is fixedly disposed on the heat exchanger body. The pressure sensor and the controller are electrically connected. A first opening / closing assembly is disposed on the vent pipe, and a second opening / closing assembly is disposed on the drain pipe. When the float abuts against the pressure sensor, the vent pipe is closed; when the drain pipe is open, the vent pipe is open.

[0008] By adopting the above technical solution, as the liquid inside the heat exchanger gradually fills, the liquid enters the level tube from the exhaust pipe, causing the float to rise and press against the pressure sensor. This allows the controller to close the exhaust pipe via the first opening and closing assembly. When the condensate drain pipe opens under the action of the second opening and closing assembly, the controller opens the exhaust pipe via the first opening and closing assembly, thus achieving automatic opening and closing control of the exhaust pipe and the condensate drain pipe.

[0009] Optionally, the first opening and closing assembly includes a first valve plate slidably disposed on the exhaust pipe, a magnetic core embedded in the first valve plate, an electromagnet fixedly disposed on the exhaust pipe, and an elastic element for retracting the first valve plate; the electromagnet is electrically connected to the controller, and when the float abuts against the pressure sensor, the electromagnet and the magnetic core repel each other, causing the first valve plate to close the exhaust pipe.

[0010] By employing the above technical solution, when the float rests against the pressure sensor, the electromagnet and the magnetic core repel each other, causing the first valve plate to seal the exhaust pipe, ensuring that the liquid inside the heat exchanger body does not leak. When the condensate drain pipe opens, the controller controls the electromagnet to close, and the first valve plate retracts under the action of the elastic element, causing the exhaust pipe to open.

[0011] Optionally, the elastic element is a spring, and the two ends of the spring are fixed to the exhaust pipe and the first valve plate, respectively.

[0012] By adopting the above technical solution, the spring can control the retraction of the first valve plate. When the electromagnet is closed, the spring can retract the first valve plate, thereby opening the exhaust pipe.

[0013] Optionally, the second opening and closing assembly includes a second valve plate rotatably mounted on the condensate drain pipe, a water pressure sensor fixedly mounted on the condensate drain pipe, and a drive component for controlling the rotation of the second valve plate; the water pressure sensor is located at the outlet end of the condensate drain pipe, and the water pressure sensor is electrically connected to the controller.

[0014] By adopting the above technical solution, when the driving component opens the second valve plate, the water pressure sensor will detect the outflowing water flow, thereby causing the controller to open the exhaust pipe through the first opening and closing component.

[0015] Optionally, the driving component is a servo motor fixedly mounted on the hydrophobic tube, the output end of the servo motor is connected to the second valve plate, and the controller is electrically connected to the servo motor.

[0016] By adopting the above technical solution, the opening degree of the condensate drain tube can be controlled by controlling the rotation angle of the second valve plate through a servo motor, thereby controlling the outflow speed of the water.

[0017] Optionally, a guide rod is fixedly installed on the liquid level tube, the guide rod is directly opposite the pressure sensor, and the float is slidably connected to the guide rod.

[0018] By adopting the above technical solution, the guide rod guides the float, making the float more stable when it moves upward, less prone to tilting or shifting, and ensuring that the float can press against the pressure sensor.

[0019] Optionally, a flow stabilizing chamber is connected between the exhaust pipe and the liquid level pipe, and a flow stabilizing plate is fixedly installed inside the flow stabilizing chamber, with through holes provided on the flow stabilizing plate.

[0020] By adopting the above technical solution, when the liquid surface fluctuates up and down, the water flow will impact the flow stabilizing plate, which can stabilize the flow, reduce the fluctuation of the liquid surface, and ensure the stability of the float when it rises.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. As the heat exchanger body gradually fills with liquid, the liquid enters the level tube from the vent pipe, causing the float to rise and press against the pressure sensor. This causes the controller to close the vent pipe via the first opening and closing assembly. When the condensate drain pipe opens under the action of the second opening and closing assembly, the controller opens the vent pipe via the first opening and closing assembly, thus achieving automatic opening and closing control of the vent pipe and the condensate drain pipe.

[0023] 2. When the float rests against the pressure sensor, the electromagnet and the magnetic core repel each other, causing the first valve plate to seal the exhaust pipe, ensuring that the liquid inside the heat exchanger body does not leak. When the condensate drain pipe opens, the controller controls the electromagnet to close, and the first valve plate retracts under the action of the elastic element, causing the exhaust pipe to open. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 This is a partially cutaway structural diagram of an embodiment of this application.

[0026] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0027] Figure 4 yes Figure 2 A magnified view of part B in the diagram.

[0028] Reference numerals in the attached drawings: 1. Heat exchanger body; 2. Exhaust pipe; 3. Drain pipe; 41. Liquid level pipe; 42. Float; 43. Pressure sensor; 44. Controller; 45. Guide rod; 51. First valve plate; 52. Magnetic core; 53. Electromagnet; 54. Spring; 61. Second valve plate; 62. Water pressure sensor; 63. Servo motor; 71. Flow stabilizer chamber; 72. Flow stabilizer plate. Detailed Implementation

[0029] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses an air-venting and liquid-draining heat exchanger. Please refer to... Figure 1 , Figure 2 and Figure 3 A vented and drainable heat exchanger includes a heat exchanger body 1, an vent pipe 2 fixedly connected to the top of the heat exchanger body 1, and a drain pipe 3 fixedly connected to the bottom of the heat exchanger body 1. The vent pipe 2 allows air to be both vented and introduced, while the drain pipe 3 allows liquid to be discharged from the heat exchanger body 1. A level pipe 41 is fixedly connected to the vent pipe 2, and a float 42 is slidably disposed within the level pipe 41, causing the float 42 to rise and float when liquid is present in the level pipe 41. A gap exists between the float 42 and the level pipe 41, allowing air to pass through the level pipe 41 and into the vent pipe 2. A pressure sensor 43 is fixedly disposed on the level pipe 41 above the float 42, and a controller 44 is fixedly disposed on the heat exchanger body 1, with the controller 44 and the pressure sensor 43 electrically connected.

[0031] The exhaust pipe 2 is equipped with a first opening and closing assembly for controlling its opening and closing, and the condensate drain pipe 3 is equipped with a second opening and closing assembly for controlling its opening and closing. When liquid is introduced into the heat exchanger body 1, air inside the heat exchanger body 1 can pass through the exhaust pipe 2 and be discharged from the level pipe 41. As the heat exchanger body 1 gradually fills with liquid, liquid enters the level pipe 41 from the exhaust pipe 2, causing the float 42 to rise under the influence of the liquid level and come into contact with the pressure sensor 43. When the pressure sensor 43 detects the float 42, the controller 44 can close the exhaust pipe 2 through the first opening and closing assembly, thereby preventing liquid leakage. Because liquid has already entered the level pipe 41, it ensures that no air remains in the exhaust pipe 2. Closing the exhaust pipe 2 ensures that no air remains inside the heat exchanger body 1, guaranteeing complete air removal. When the condensate drain pipe 3 is opened via the second opening / closing assembly, the liquid inside the heat exchanger body 1 flows out, causing the controller 44 to open the exhaust pipe 2 via the first opening / closing assembly. This ensures that air can enter the heat exchanger body 1 through the level pipe 41 and the exhaust pipe 2. For the exhaust pipe 2 and the condensate drain pipe 3, the entire opening and closing process does not require manual valve operation, resulting in a higher degree of automation and greater convenience.

[0032] For details, please refer to Figure 3The first opening and closing assembly includes a first valve plate 51 slidably disposed on the exhaust pipe 2, a magnetic core 52 embedded in the first valve plate 51, an electromagnet 53 fixedly disposed on the exhaust pipe 2, and an elastic element for controlling the retraction of the first valve plate 51. The outer surface of the first valve plate 51 is covered with a rubber sealing layer to ensure airtightness. The electromagnet 53 is electrically connected to the controller 44. When the float 42 abuts against the pressure sensor 43, the controller 44 can control the electromagnet 53 to activate, causing the electromagnet 53 and the magnetic core 52 to repel each other, thereby pushing the magnetic core 52 out to close the exhaust pipe 2. When the phloem 3 is open, the controller 44 can control the electromagnet 53 to close, and the first valve plate 51 retracts under the action of the elastic element, thereby opening the exhaust pipe 2.

[0033] Please refer to Figure 3 The elastic element is a spring 54 installed on the exhaust pipe 2. One end of the spring 54 is fixedly connected to the exhaust pipe 2, and the other end of the spring 54 is fixedly connected to the first valve plate 51. When the electromagnet 53 is closed, the first valve plate 51 can retract under the action of the spring 54, thereby opening the exhaust pipe 2.

[0034] For details, please refer to Figure 4 The second opening and closing assembly includes a second valve plate 61 rotatably mounted on the condensate drain pipe 3, a water pressure sensor 62 fixedly mounted on the condensate drain pipe 3, and a drive component for controlling the rotation of the second valve plate 61. The outer surface of the second valve plate 61 is covered with a rubber sealing layer to ensure airtightness. The water pressure sensor 62 is electrically connected to the controller 44 and is located at the outlet end of the condensate drain pipe 3. When the condensate drain pipe 3 is open, after the water pressure sensor 62 detects the outflowing water, the controller 44 closes the electromagnet 53, causing the first valve plate 51 to open the exhaust pipe 2 under the action of the spring 54, thereby ensuring that air can enter the heat exchanger body 1 to achieve pressure balance.

[0035] Please refer to Figure 4 The driving component is a servo motor 63 fixedly mounted on the condensate drain 3. The output shaft of the servo motor 63 is fixedly connected to the second valve plate 61. The servo motor 63 is electrically connected to the controller 44. The controller 44 can control the servo motor 63 to start, thereby controlling the rotation angle of the second valve plate 61, adjusting the opening of the condensate drain 3, and controlling the outflow speed of the water.

[0036] Please refer to Figure 3 In order to ensure that the float 42 can press against the pressure sensor 43, a guide rod 45 is fixedly installed on the liquid level tube 41. The guide rod 45 is positioned directly opposite the pressure sensor 43. The guide rod 45 guides the movement of the float 42, so that the float 42 can press against the pressure sensor 43 when it floats up, thus preventing the float 42 from tilting or shifting.

[0037] Please refer to Figure 3 To ensure a more stable rise in the liquid level in the level tube 41, a flow stabilizing chamber 71 is fixedly connected between the exhaust pipe 2 and the level tube 41. A flow stabilizing plate 72 is fixedly installed in the flow stabilizing chamber 71, and the flow stabilizing plate 72 has evenly distributed through holes. When temporary fluctuations occur in the liquid level, the water flow can impact the flow stabilizing plate 72, thereby reducing the vertical fluctuations of the water flow and improving the stability of the rising float 42. The through holes ensure both water flow and air passage.

[0038] The implementation principle of this application embodiment is as follows: When liquid is filled into the heat exchanger body 1, the air inside the heat exchanger body 1 is discharged from the exhaust pipe 2. As the liquid inside the heat exchanger body 1 gradually fills, the liquid will enter the liquid level pipe 41 from the exhaust pipe 2, causing the float 42 in the liquid level pipe 41 to rise. When the float 42 touches the pressure sensor 43, the controller 44 controls the electromagnet 53 to start, so that the first valve plate 51 closes the exhaust pipe 2.

[0039] The servo motor 63 is started by the controller 44. When the water flows out of the drain pipe 3, it is detected by the water pressure sensor 62, which causes the controller 44 to control the electromagnet 53 to close. The first valve plate 51 opens the exhaust pipe 2 under the action of the spring 54, so that air can enter the heat exchanger body 1.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ventable and liquid-drainable heat exchanger, characterized in that, include: The heat exchanger body (1), the exhaust pipe (2) connected to the top of the heat exchanger body (1) and the condensate pipe (3) connected to the bottom of the heat exchanger body (1), the exhaust pipe (2) is connected to the level pipe (41), the level pipe (41) is slidably provided with a float (42), there is a gap between the float (42) and the level pipe (41) for air to pass through, the level pipe (41) is fixedly provided with a pressure sensor (43), the heat exchanger body (1) is fixedly provided with a controller (44), the pressure sensor (43) and the controller (44) are electrically connected, the exhaust pipe (2) is provided with a first opening and closing component, the condensate pipe (3) is provided with a second opening and closing component, when the float (42) is against the pressure sensor (43), the exhaust pipe (2) is closed, when the condensate pipe (3) is open, the exhaust pipe (2) is open.

2. The ventable and liquid-drainable heat exchanger according to claim 1, characterized in that: The first opening and closing assembly includes a first valve plate (51) slidably disposed on the exhaust pipe (2), a magnetic core (52) embedded in the first valve plate (51), an electromagnet (53) fixedly disposed on the exhaust pipe (2), and an elastic element for retracting the first valve plate (51); the electromagnet (53) is electrically connected to the controller (44), and when the float (42) abuts against the pressure sensor (43), the electromagnet (53) and the magnetic core (52) repel each other, causing the first valve plate (51) to close the exhaust pipe (2).

3. A ventable and liquid-drainable heat exchanger according to claim 2, characterized in that: The elastic element is a spring (54), and the two ends of the spring (54) are fixed to the exhaust pipe (2) and the first valve plate (51) respectively.

4. A ventable and liquid-drainable heat exchanger according to claim 1, characterized in that: The second opening and closing assembly includes a second valve plate (61) rotatably mounted on the condensate drain pipe (3), a water pressure sensor (62) fixedly mounted on the condensate drain pipe (3), and a drive unit for controlling the rotation of the second valve plate (61); the water pressure sensor (62) is located at the outlet end of the condensate drain pipe (3), and the water pressure sensor (62) is electrically connected to the controller (44).

5. A ventable and liquid-drainable heat exchanger according to claim 4, characterized in that: The driving component is a servo motor (63) fixedly mounted on the hydrophobic tube (3). The output end of the servo motor (63) is connected to the second valve plate (61). The controller (44) is electrically connected to the servo motor (63).

6. A ventable and liquid-drainable heat exchanger according to claim 1, characterized in that: A guide rod (45) is fixedly installed on the liquid level tube (41). The guide rod (45) faces the pressure sensor (43). The float (42) is slidably connected to the guide rod (45).

7. A ventable and liquid-drainable heat exchanger according to claim 1, characterized in that: A flow stabilizing chamber (71) is connected between the exhaust pipe (2) and the liquid level pipe (41). A flow stabilizing plate (72) is fixedly installed inside the flow stabilizing chamber (71), and a through hole is opened on the flow stabilizing plate (72).

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