A spiral plate heat exchanger with precise control of outlet temperature

Abstract

The present invention discloses a spiral plate heat exchanger with precise control of outlet temperature, which specifically relates to the field of heat exchangers, including a spiral plate heat exchanger, wherein a flow control seat is fixedly installed at the bottom end of the spiral plate heat exchanger, a liquid heat exchange inlet is fixedly connected to the input end of the spiral plate heat exchanger, the other end of the liquid heat exchange inlet is fixedly connected to a flow rate control valve, a first liquid outlet and a second liquid outlet are fixedly connected to the output end of the spiral plate heat exchanger, a temperature sensor is fixedly installed inside the first liquid outlet and the second liquid outlet, and a spiral piston is slidably installed inside the spiral plate heat exchanger. The present invention changes the volume of the internal cavity of the spiral plate heat exchanger by lifting and lowering the spiral piston, thereby increasing or decreasing the stock of the liquid flow inside the spiral plate heat exchanger per unit time under the same liquid flow velocity, changing the heat exchange amount between the liquid flows, thereby changing the temperature of the heat exchange liquid flow at the outlet end, and precisely controlling the liquid flow outlet temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and more specifically, the present invention relates to a spiral plate heat exchanger capable of accurately controlling outlet temperature. Background Art

[0002] Heat exchangers are widely used in industrial production. For example, they play an important role in various industrial sectors such as petrochemical, light industry, medicine, food, pharmaceuticals, and aerospace. Spiral plate heat exchangers are made of two parallel metal plates rolled into two spiral channels. The cold and hot fluids exchange heat through the spiral plate wall to achieve the heat exchange effect of the two media. Most of the materials used are carbon steel, stainless steel, aluminum, copper and other materials with good thermal conductivity. They are widely used in petrochemical, chemical, pharmaceutical and other industries.

[0003] At present, the spiral plate heat exchangers in operation in industrial production basically all have cold and hot fluids flowing on both sides of the spiral plate respectively, and heat exchange is carried out through the spiral plate. Since the structure of the spiral plate heat exchanger is too simple, it is impossible to control the heat conduction of the liquid inside, and thus it is impossible to accurately control the temperature of the liquid outlet end of the spiral plate heat exchanger, and its practicality is poor.

[0004] Therefore, there is an urgent need to provide a spiral plate heat exchanger that can accurately control the outlet temperature. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a spiral plate heat exchanger with precise control of outlet temperature. A spiral piston compatible with the spiral plate heat exchanger is provided, and the volume of the internal cavity of the spiral plate heat exchanger is changed by lifting and lowering the spiral piston, thereby increasing or decreasing the amount of liquid flow inside the spiral plate heat exchanger per unit time under the condition of the same liquid flow rate. The flow rate control valve inside the flow control seat is used to perform precise flow rate adjustment under the control of the control panel to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spiral plate heat exchanger for accurately controlling outlet temperature, comprising a spiral plate heat exchanger, a flow control seat being fixedly installed at the bottom end of the spiral plate heat exchanger, an input end of the spiral plate heat exchanger being fixedly connected to a liquid heat exchange inlet, the other end of the liquid heat exchange inlet being fixedly connected to a flow rate control valve located inside the flow control seat, an input end of the flow rate control valve being fixedly connected to a liquid flow inlet, an output end of the spiral plate heat exchanger being fixedly connected to a first liquid flow outlet and a second liquid flow outlet, temperature sensors being fixedly installed inside the first liquid flow outlet and the second liquid flow outlet, a spiral piston being slidably installed inside the spiral plate heat exchanger, a piston adjusting rod being fixedly installed on the top surface of the spiral piston, an adjusting pressure plate being fixedly installed on the top surface of the piston adjusting rod, and a control panel being fixedly installed on the surface of the flow control seat.

[0007] In a preferred embodiment, the spiral plate heat exchanger is provided with a first liquid flow channel and a second liquid flow channel inside, the number of the liquid flow heat exchange inlets is two, and the two liquid flow heat exchange inlets are respectively connected to the inside of the first liquid flow channel and the second liquid flow channel, and the first liquid flow outlet and the second liquid flow outlet are respectively connected to the ends of the first liquid flow channel and the second liquid flow channel.

[0008] In a preferred embodiment, the spiral plate heat exchanger is an integrally formed structure, the spiral plate heat exchanger is a metal copper component, the spiral plate heat exchanger is formed by twisting a single-piece copper plate, the bottom surface of the spiral plate heat exchanger is a closed structure, and the top surface of the spiral plate heat exchanger is an open structure.

[0009] In a preferred embodiment, a spiral plate groove is provided inside the spiral piston, the shape and size of the spiral plate groove are adapted to the spiral plate heat exchanger, and the spiral piston is interference fit with the inner wall of the spiral plate heat exchanger.

[0010] In a preferred embodiment, the spiral piston is a component made of high temperature resistant rubber material, a piston rubber pad is fixedly attached to the bottom surface of the spiral piston, and the peripheral side of the piston rubber pad abuts against the inner wall of the spiral plate heat exchanger.

[0011] In a preferred embodiment, the number of the piston adjusting rods is several, the upper and lower ends of the piston adjusting rods are respectively fixedly connected to the bottom surface of the adjusting pressure plate and the top surface of the spiral piston, and the piston adjusting rods are evenly distributed on the inner side of the spiral piston and the adjusting pressure plate.

[0012] In a preferred embodiment, the input end of the flow rate control valve is electrically connected to the output end of the control panel, the output end of the temperature sensor is electrically connected to the input end of the control panel, and the control panel is a PLC controller or a single-chip microcomputer structure.

[0013] Technical effects and advantages of the present invention:

[0014] 1. The present invention provides a spiral piston adapted to the spiral plate heat exchanger, and utilizes the lifting and lowering of the spiral piston to change the volume of the internal cavity of the spiral plate heat exchanger, thereby increasing or decreasing the amount of liquid flow inside the spiral plate heat exchanger per unit time under the condition of the same liquid flow velocity, changing the heat exchange amount between the liquid flows, thereby changing the temperature of the heat exchange liquid flow at the outlet end, and accurately controlling the liquid flow outlet temperature;

[0015] 2. The present invention sets a flow control seat structure and uses the flow rate control valve inside the flow control seat to perform precise flow rate regulation under the control of the control panel, thereby controlling the liquid flow entering the spiral plate heat exchanger per unit time, thereby changing the total amount of liquid flow involved in heat exchange and realizing adaptive regulation of the liquid flow outlet temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the spiral plate heat exchanger of the present invention.

[0018] Figure 3 It is a schematic diagram of the spiral piston installation structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the spiral piston structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the internal structure of the flow control seat of the present invention.

[0021] The figures are marked as follows: 1. spiral plate heat exchanger; 2. flow control seat; 3. liquid flow heat exchange inlet; 4. piston adjustment rod; 5. adjustment pressure plate; 6. first liquid flow outlet; 7. temperature sensor; 8. second liquid flow outlet; 9. control panel; 10. spiral piston; 11. first liquid flow channel; 12. second liquid flow channel; 21. liquid flow inlet; 22. flow rate control valve; 101. spiral plate groove. 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] As attached Figure 1-5 A spiral plate heat exchanger for accurately controlling outlet temperature is shown, comprising a spiral plate heat exchanger 1, a flow control seat 2 is fixedly installed at the bottom end of the spiral plate heat exchanger 1, an input end of the spiral plate heat exchanger 1 is fixedly connected to a liquid heat exchange inlet 3, the other end of the liquid heat exchange inlet 3 is fixedly connected to a flow rate control valve 22 located inside the flow control seat 2, the input end of the flow rate control valve 22 is fixedly connected to a liquid flow inlet 21, an output end of the spiral plate heat exchanger 1 is fixedly connected to a first liquid flow outlet 6 and a second liquid flow outlet 8, a temperature sensor 7 is fixedly installed inside the first liquid flow outlet 6 and the second liquid flow outlet 8, a spiral piston 10 is slidably installed inside the spiral plate heat exchanger 1, a piston adjusting rod 4 is fixedly installed on the top surface of the spiral piston 10, an adjusting pressure plate 5 is fixedly installed on the top surface of the piston adjusting rod 4, and a control panel 9 is fixedly installed on the surface of the flow control seat 2.

[0024] The specific implementation method is as follows: by setting a spiral piston 10 compatible with the spiral plate heat exchanger 1, the volume of the internal cavity of the spiral plate heat exchanger 1 is changed by lifting and lowering the spiral piston 10, so as to increase or decrease the stock of the internal liquid flow of the spiral plate heat exchanger 1 per unit time under the condition of the same liquid flow rate, change the heat exchange rate between the liquid flows, thereby changing the temperature of the heat exchange liquid flow at the outlet end, and accurately controlling the liquid flow outlet temperature; in addition, the present invention sets a flow control seat 2 structure, and uses the flow rate control valve 22 inside the flow control seat 2 to perform accurate flow rate regulation under the control of the control panel 9, thereby controlling the liquid flow entering the spiral plate heat exchanger 1 per unit time, thereby changing the total amount of liquid flow participating in the heat exchange, and realizing adaptive regulation of the liquid flow outlet temperature.

[0025] Among them, the spiral plate heat exchanger 1 is provided with a first liquid flow channel 11 and a second liquid flow channel 12 inside, the number of liquid flow heat exchange inlets 3 is two, and the two liquid flow heat exchange inlets 3 are respectively connected to the inside of the first liquid flow channel 11 and the second liquid flow channel 12, and the first liquid flow outlet 6 and the second liquid flow outlet 8 are respectively connected to the ends of the first liquid flow channel 11 and the second liquid flow channel 12, for the circulation of two liquids with different temperatures.

[0026] Among them, the spiral plate heat exchanger 1 is an integrated structure, the spiral plate heat exchanger 1 is a metal copper material component, the spiral plate heat exchanger 1 is formed by twisting a one-piece copper plate, the bottom surface of the spiral plate heat exchanger 1 is a closed structure, and the top surface of the spiral plate heat exchanger 1 is an open structure, which uses the high thermal conductivity of metal copper to achieve rapid heat conduction.

[0027] Among them, a spiral plate groove 101 is provided inside the spiral piston 10, and the shape and size of the spiral plate groove 101 are adapted to the spiral plate heat exchanger 1. The spiral piston 10 is interference fit with the inner wall of the spiral plate heat exchanger 1, and the internal volume of the spiral plate heat exchanger 1 is adjusted by raising and lowering the spiral piston 10.

[0028] Among them, the spiral piston 10 is a component made of high-temperature resistant rubber material, and a piston rubber pad is fixed to the bottom surface of the spiral piston 10. The circumferential side of the piston rubber pad abuts against the inner wall of the spiral plate heat exchanger 1, thereby improving the sealing between the spiral piston 10 and the inner wall of the spiral plate heat exchanger 1 and preventing liquid from escaping.

[0029] Among them, the number of piston adjusting rods 4 is several, and the upper and lower ends of the piston adjusting rod 4 are fixedly connected to the bottom surface of the adjusting pressure plate 5 and the top surface of the spiral piston 10 respectively. The piston adjusting rods 4 are evenly distributed on the inner side of the spiral piston 10 and the adjusting pressure plate 5, and are used to provide multi-point support for the spiral piston 10, facilitating the activity adjustment of the spiral piston 10.

[0030] Among them, the input end of the flow rate control valve 22 is electrically connected to the output end of the control panel 9, the output end of the temperature sensor 7 is electrically connected to the input end of the control panel 9, and the control panel 9 is a PLC controller or a single-chip microcomputer structure to achieve automatic control.

[0031] Among them, the model of the control panel 9 is RP1N-10MT; the model of the temperature sensor 7 is QN-WZPT-291; and the model of the flow rate control valve 22 is DN08-65.

[0032] Working principle of the present invention:

[0033] Step 1: connect two liquid flow pipes with different temperatures through the liquid flow inlet 21, introduce the liquid flow into the interior of the spiral plate heat exchanger 1, and conduct heat to the surface of the spiral plate heat exchanger 1 and to each other through the flow of the liquid flow inside the spiral plate heat exchanger 1, so as to achieve heat exchange;

[0034] Step 2: Observe the measured temperature of the temperature sensor 7 displayed on the surface of the control panel 9. If the temperature difference with the initial temperature of the liquid flow is large, it indicates that the heat exchange is large. If the heat exchange of the two liquid flows needs to be reduced, just press the adjustment plate 5 downward to drive the spiral piston 10 to move downward inside the spiral plate heat exchanger 1 through the piston adjustment rod 4, change the volume of the internal cavity of the spiral plate heat exchanger 1, thereby reducing the stock of the liquid flow inside the spiral plate heat exchanger 1 per unit time under the condition of the same liquid flow rate, reduce the heat exchange between the liquid flows, and thus change the temperature of the heat exchange liquid flow at the outlet end;

[0035] Step 3: When the required outlet temperature cannot be accurately reached after changing the heat exchange amount, the flow rate limiting function of the two flow rate control valves 22 can be controlled to automatically control the flow rates of the two temperature liquid flows respectively, thereby changing the liquid flow rate entering the spiral plate heat exchanger 1 per unit time, thereby changing the total amount of liquid flow involved in the heat exchange, and realizing automatic adjustment of the liquid flow outlet temperature.

[0036] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0037] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0038] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spiral plate heat exchanger for accurately controlling outlet temperature, comprising a spiral plate heat exchanger (1), characterized in that: A flow control seat (2) is fixedly mounted on the bottom end of the spiral plate heat exchanger (1); a liquid heat exchange inlet (3) is fixedly connected to the input end of the spiral plate heat exchanger (1); a flow rate control valve (22) located inside the flow control seat (2) is fixedly connected to the other end of the liquid heat exchange inlet (3); the input end of the flow rate control valve (22) is fixedly connected to the liquid flow inlet (21); a first liquid flow outlet (6) and a second liquid flow outlet (8) are fixedly connected to the output end of the spiral plate heat exchanger (1); a temperature sensor (7) is fixedly mounted inside the first liquid flow outlet (6) and the second liquid flow outlet (8); a spiral piston (10) is slidably mounted inside the spiral plate heat exchanger (1); a piston adjustment rod (4) is fixedly mounted on the top surface of the spiral piston (10); an adjustment pressure plate (5) is fixedly mounted on the top surface of the piston adjustment rod (4); and a control panel (9) is fixedly mounted on the surface of the flow control seat (2); The spiral plate heat exchanger (1) is provided with a first liquid flow channel (11) and a second liquid flow channel (12) inside, the number of the liquid flow heat exchange inlets (3) is two, and the two liquid flow heat exchange inlets (3) are respectively connected to the inside of the first liquid flow channel (11) and the second liquid flow channel (12), and the first liquid flow outlet (6) and the second liquid flow outlet (8) are respectively connected to the ends of the first liquid flow channel (11) and the second liquid flow channel (12); The spiral plate heat exchanger (1) is an integrally formed structure, the spiral plate heat exchanger (1) is a component made of metal copper, the spiral plate heat exchanger (1) is formed by twisting a single copper plate, the bottom surface of the spiral plate heat exchanger (1) is a closed structure, and the top surface of the spiral plate heat exchanger (1) is an open structure; A spiral plate groove (101) is provided inside the spiral piston (10), the shape and size of the spiral plate groove (101) are compatible with the spiral plate heat exchanger (1), and the spiral piston (10) is interference-fitted with the inner wall of the spiral plate heat exchanger (1); The spiral piston (10) is a component made of high-temperature resistant rubber material, a piston rubber pad is fixedly attached to the bottom surface of the spiral piston (10), and the circumferential side of the piston rubber pad abuts against the inner wall of the spiral plate heat exchanger (1); The number of the piston adjustment rods (4) is several, and the upper and lower ends of the piston adjustment rods (4) are respectively fixedly connected to the bottom surface of the adjustment pressure plate (5) and the top surface of the spiral piston (10), and the piston adjustment rods (4) are evenly distributed on the inner sides of the spiral piston (10) and the adjustment pressure plate (5); The input end of the flow rate control valve (22) is electrically connected to the output end of the control panel (9), the output end of the temperature sensor (7) is electrically connected to the input end of the control panel (9), and the control panel (9) is a PLC controller or a single-chip microcomputer structure.

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