Anti-freezing plate heat exchanger

Abstract

The utility model discloses a kind of freeze-cracking prevention plate heat exchangers, relating to plate heat exchanger field, including two end plates, multiple heat exchange plates between two end plates and the two support legs of each end plate bottom surface fixed connection, each heat exchange plate is adjacently fixedly connected with sealing strip. The utility model is by setting auxiliary assembly in the top and bottom of multiple heat exchange plates, realize the freeze protection mechanism when stopping, when device stops running, two groups of auxiliary assembly work cooperatively, liquid remaining in the flow passage between heat exchange plate is discharged, avoid the liquid ice expansion due to stopping time being too long and cause heat exchange plate rupture, simultaneously, control component integrated on auxiliary assembly has double function, ensure the sealing of flow passage between heat exchange plate when equipment is running, switch to liquid discharge state when stopping, thoroughly remove residual liquid, by physical structure innovation, fundamentally solve the freeze-cracking risk of plate heat exchanger under low temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of plate heat exchangers, and in particular to a plate heat exchanger resistant to freezing and cracking. Background Technology

[0002] Plate heat exchangers are widely used in the machinery, chemical and food industries. For example, they are used for cooling lubricating oil in power machinery, heating, cooling or condensing various fluids in chemical production, and heating and sterilizing milk and cooling beverages in the food industry.

[0003] The applicant discovered through a search that a Chinese patent discloses a "plate heat exchanger" with publication number "CN222257850U". This patent mainly uses the design of a motor, slide rail, bidirectional threaded rod, sliding block, slide groove, slider and guide telescopic rod to enable the cover plate on the plate heat exchanger to be quickly closed by electric sliding during use. This not only significantly improves the overall assembly efficiency of the plate heat exchanger and facilitates the efficient assembly and use of the plate heat exchanger, but also enables the cover plate to be quickly separated during later inspection and maintenance, facilitating efficient inspection and maintenance of the plate heat exchanger's interior.

[0004] The above-mentioned device can achieve the effect of facilitating efficient maintenance of the heat exchanger's interior through a series of structural designs. However, when the device is operating in a cold environment, the residual liquid in the thin-layer flow channel between the plates will expand due to freezing and exceed the pressure limit of the plates, causing the heat exchange plates to crack and affecting the normal function of the heat exchanger. Utility Model Content

[0005] The purpose of this invention is to provide a plate heat exchanger that is resistant to freezing and cracking, in order to solve the problem mentioned in the background art that the heat exchange plates are prone to cracking due to the freezing of liquid in the jacket during use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plate heat exchanger resistant to freezing and cracking, comprising two end plates, a plurality of heat exchange plates disposed between the two end plates, and two support legs fixedly connected to the bottom surface of each end plate. Each heat exchange plate is fixedly connected with a sealing strip between adjacent plates. The top and bottom of the opposite sides of the two end plates are provided with auxiliary components. Each auxiliary component includes a fixing shell. The opposite sides of the inner walls of the two fixing shells are respectively fixedly connected to the top and bottom surfaces of the plurality of heat exchange plates. Each fixing shell is provided with a control component.

[0007] Preferably, the auxiliary component further includes a cavity, which is formed inside the corresponding fixed shell.

[0008] Preferably, the auxiliary component further includes multiple auxiliary ports, each of which is opened on one side of the corresponding fixed shell, and each auxiliary port communicates with the interior of the corresponding cavity.

[0009] Preferably, the control component includes a sealing plug, one side of which is fixedly connected to one side of the inner wall of the cavity, and the sealing plug is frustoconical.

[0010] Preferably, the control component further includes a sealing plate, the four sides of the sealing plate surface being slidably connected to the four sides of the corresponding cavity inner wall.

[0011] Preferably, the control assembly further includes a control rod, the rod wall of which is slidably connected to the inner wall of the corresponding fixed shell, and the tube wall at one end of the control rod extends into the interior of the corresponding cavity and is fixedly connected to the inner wall of the corresponding sealing plate. The control rod is a hollow tube.

[0012] Preferably, the control component further includes a sealing ring and two threaded holes, one side of the sealing ring being fixedly connected to one side of the fixed housing, and the two threaded holes being opened on one side of the corresponding fixed housing surface.

[0013] Preferably, the control assembly further includes two mounting plates, the opposite sides of which are fixedly connected to the rod wall of the corresponding control rod, and the inner wall of each mounting plate is threaded with a fastening stud.

[0014] The technical effects and advantages of this utility model are as follows: By setting auxiliary components at the top and bottom of multiple heat exchange plates, this utility model realizes an anti-freeze protection mechanism during shutdown. When the device stops running, the two sets of auxiliary components work together to drain the liquid remaining in the flow channels between the heat exchange plates, avoiding the heat exchange plates from cracking due to the expansion of the liquid caused by prolonged shutdown. At the same time, the control components integrated on the auxiliary components have dual functions: ensuring the sealing of the flow channels between the heat exchange plates during equipment operation, and switching to the liquid drainage state when the device stops to completely remove the residual liquid. Through physical structural innovation, the risk of freezing and cracking of plate heat exchangers in low-temperature environments is fundamentally solved. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a frontal cross-sectional view of the present invention.

[0017] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0019] In the diagram: 1. End plate; 2. Auxiliary component; 3. Control component; 4. Heat exchange plate; 5. Support leg; 6. Sealing strip; 201. Fixed shell; 202. Cavity; 203. Auxiliary port; 301. Control rod; 302. Sealing ring; 303. Mounting plate; 304. Fastening stud; 305. Threaded hole; 306. Sealing plate; 307. Sealing plug. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figures 1 to 4 As shown, a plate heat exchanger for preventing freezing and cracking according to the first aspect of this utility model includes two end plates 1, a plurality of heat exchange plates 4 disposed between the two end plates 1, and two support legs 5 fixedly connected to the bottom surface of each end plate 1. Each heat exchange plate 4 is fixedly connected with a sealing strip 6 between adjacent plates. The top and bottom of the opposite side of the two end plates 1 are provided with auxiliary components 2. Each auxiliary component 2 includes a fixing shell 201. The opposite side of the inner wall of the two fixing shells 201 is fixedly connected to the top and bottom surfaces of the plurality of heat exchange plates 4, respectively. Each fixing shell 201 is provided with a control component 3.

[0022] The technical effects achieved by the above embodiments are as follows: by setting auxiliary components 2 at the top and bottom of multiple heat exchange plates 4, an anti-freeze protection mechanism is realized during shutdown. When the device stops running, the two sets of auxiliary components 2 work together to drain the liquid remaining in the flow channel between the heat exchange plates 4, avoiding the heat exchange plates 4 from cracking due to the liquid freezing and expansion caused by the prolonged shutdown time. At the same time, the control component 3 integrated on the auxiliary components 2 has a dual function: ensuring the sealing of the flow channel between the heat exchange plates 4 when the equipment is running, and switching to the liquid drainage state when the device is shut down to completely remove the residual liquid. Through physical structural innovation, the risk of freezing and cracking of plate heat exchangers in low-temperature environments is fundamentally solved. Example 2

[0023] like Figures 2 to 4As shown, a plate heat exchanger resistant to freezing and cracking includes all the contents of Embodiment 1. In addition, the auxiliary component 2 also includes a cavity 202, which is opened inside the corresponding fixed shell 201. The auxiliary component 2 also includes a plurality of auxiliary ports 203, which are all opened on one side of the corresponding fixed shell 201. Each auxiliary port 203 communicates with the interior of the corresponding cavity 202.

[0024] The technical effect achieved by the above embodiment is as follows: when liquid drainage is required, gas is introduced into the cavity 202 through the control component 3 by the external gas charging device, and then the liquid in the flow channel of each heat exchange plate 4 is discharged from the auxiliary port 203 below, which effectively avoids the problem of a large amount of liquid remaining between each heat exchange plate 4 and freezing, causing the heat exchange plate 4 to crack. Example 3

[0025] like Figure 3 and Figure 4 As shown, a plate heat exchanger resistant to freezing and cracking includes all the contents of Embodiment 2. Furthermore, the control assembly 3 includes a sealing plug 307, one side of which is fixedly connected to one side of the inner wall of the cavity 202. The sealing plug 307 is frustoconical. The control assembly 3 also includes a sealing plate 306, the four sides of which are slidably connected to the four sides of the corresponding inner wall of the cavity 202. The control assembly 3 also includes a control rod 301, the rod wall of which is slidably connected to the inner wall of the corresponding fixed shell 201. One end of the control rod 301 extends into the corresponding cavity. The cavity 202 is inside and fixedly connected to the inner wall of the corresponding sealing plate 306. The control rod 301 is a hollow tube. The control assembly 3 also includes a sealing ring 302 and two threaded holes 305. One side of the sealing ring 302 is fixedly connected to one side of the fixed shell 201. The two threaded holes 305 are opened on one side of the surface of the corresponding fixed shell 201. The control assembly 3 also includes two mounting plates 303. The opposite sides of the two mounting plates 303 are fixedly connected to the rod wall of the corresponding control rod 301. The inner wall of each mounting plate 303 is threaded with a fastening stud 304.

[0026] The technical effect achieved by the above embodiment is as follows: the control rod 301 located at the top can be directly connected to the external air blowing equipment through the flange, which facilitates the gas to enter the cavity 202 and the flow channels of each heat exchange plate 4 through the control rod 301. When the equipment needs to seal the flow channels between each heat exchange plate 4, the two control rods 301 are pressed respectively, so that the two control rods 301 drive the corresponding sealing plate 306 to move towards the corresponding sealing plug 307. Then, the sealing plate 306 can seal each auxiliary port 203, and the sealing plug 307 can seal one end of the control rod 301. Finally, the control rod 301 is fixed by screwing the corresponding fastening stud 304 into the corresponding threaded hole 305. At this time, the flow channels between each heat exchange plate 4 are kept in a sealed state.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plate heat exchanger resistant to freezing and cracking, comprising two end plates (1), a plurality of heat exchange plates (4) disposed between the two end plates (1), and two support legs (5) fixedly connected to the bottom surface of each end plate (1), characterized in that: Each heat exchange plate (4) is fixedly connected with a sealing strip (6) between adjacent plates. The top and bottom of the opposite side of the two end plates (1) are provided with auxiliary components (2). Each auxiliary component (2) includes a fixed shell (201). The opposite side of the inner wall of the two fixed shells (201) is fixedly connected to the top and bottom surfaces of the multiple heat exchange plates (4) respectively. Each fixed shell (201) is provided with a control component (3).

2. The plate heat exchanger with anti-freeze cracking according to claim 1, characterized in that: The auxiliary component (2) also includes a cavity (202) which is formed inside the corresponding fixed shell (201).

3. A plate heat exchanger resistant to freezing and cracking according to claim 2, characterized in that: The auxiliary component (2) also includes a plurality of auxiliary ports (203), each of which is opened on one side of the corresponding fixed shell (201), and each of the auxiliary ports (203) communicates with the interior of the corresponding cavity (202).

4. A plate heat exchanger resistant to freezing and cracking according to claim 1, characterized in that: The control component (3) includes a sealing plug (307), one side of which is fixedly connected to one side of the inner wall of the cavity (202), and the sealing plug (307) is frustum-shaped.

5. A plate heat exchanger resistant to freezing and cracking according to claim 4, characterized in that: The control component (3) also includes a sealing plate (306), the four sides of the surface of the sealing plate (306) being slidably connected to the four sides of the inner wall of the corresponding cavity (202).

6. A plate heat exchanger resistant to freezing and cracking according to claim 5, characterized in that: The control component (3) also includes a control rod (301), the rod wall of the control rod (301) is slidably connected to the inner wall of the corresponding fixed shell (201), the tube wall of one end of the control rod (301) extends into the interior of the corresponding cavity (202) and is fixedly connected to the inner wall of the corresponding sealing plate (306), and the control rod (301) is a hollow tube.

7. A plate heat exchanger resistant to freezing and cracking according to claim 6, characterized in that: The control component (3) also includes a sealing ring (302) and two threaded holes (305). One side of the sealing ring (302) is fixedly connected to one side of the fixed shell (201), and the two threaded holes (305) are opened on one side of the surface of the corresponding fixed shell (201).

8. A plate heat exchanger resistant to freezing and cracking according to claim 7, characterized in that: The control component (3) also includes two mounting plates (303), the opposite sides of the two mounting plates (303) are fixedly connected to the rod wall of the corresponding control rod (301), and the inner wall of each mounting plate (303) is threaded with a fastening stud (304).

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