Low-temperature-resistant plate heat exchanger

Abstract

The utility model discloses a low temperature resistant plate heat exchanger which comprises a heat exchanger body and a water inlet connected to the heat exchanger body, the end of the water inlet is fixedly connected with a connecting pipe, the other end of the connecting pipe is fixedly connected with a water conveying pipe, and a rotatable frame of a circular ring structure is arranged in the water conveying pipe. A filter screen is embedded in the inner side of the frame, a blow-off pipe is fixedly connected to the bottom of the connecting pipe, a plug is slidably connected to the side, close to the connecting pipe, in the blow-off pipe, a control assembly connected with the plug is arranged at the top of the connecting pipe, and the control assembly is used for controlling the plug to move up and down to achieve connection and disconnection of the blow-off pipe. Through the structure, the structure arranged on the outer side of the heat exchanger body is simple, operation is convenient and fast, the problem that the heat exchange efficiency is affected by occupying the internal space of the heat exchanger body is avoided, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of plate heat exchangers, in particular to a low-temperature resistant plate heat exchanger. Background Art

[0002] A plate heat exchanger is a highly efficient heat exchanger formed by stacking a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat exchange is carried out through the plates. The plate heat exchanger is an ideal device for liquid-liquid and liquid-vapor heat exchange.

[0003] In the prior art, through retrieval, it is found that a Chinese patent discloses a low-temperature resistant plate heat exchanger, and its application number is 202320398488.2. The above patent mainly includes a first limiting plate, a heat exchange plate, and a second limiting plate. An inlet is provided on the outer side wall of the second limiting plate, and a filtering component is detachably connected to the water inlet end of the inlet through bolts. The filtering component includes a filtering cylinder, a filter screen, a brush plate, a collection bottle, a threaded port, and a connecting column. The filter screen is detachably connected inside the filtering cylinder, the brush plate is arranged on the outer surface of the filter screen, a filter screen opening is provided on the lower surface of the filtering cylinder, the top end of the collection bottle is fixedly connected with a connecting column, and the collection bottle is threadedly connected to the threaded port provided on the lower surface of the filtering cylinder through the connecting column. Although the above utility model can effectively clean the filtering mechanism in the heat exchanger through the set cleaning structure to ensure the filtering effect, thereby preventing sundries from entering the heat exchanger and ensuring the heat exchange effect of the heat exchanger. However, when a transmission rod is arranged inside the water inlet pipe to realize the power transmission between the servo motor and the brush plate, the transmission rod arranged inside the water inlet pipe will occupy the internal space of the water inlet pipe, resulting in a reduction in the effective flow cross-section of the water inlet pipe, a decrease in the flow rate and flow of the fluid, and thus affecting the working efficiency of the heat exchanger. Therefore, those skilled in the art provide a low-temperature resistant plate heat exchanger to solve the problems raised in the above background art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a low-temperature resistant plate heat exchanger. When cleaning the filter screen, under the action of the set driving component, the filter screen is driven to flip to facilitate the backwashing operation of the filter screen, and the set control component can be used to drive the blockage inside the sewage discharge pipe to separate from the sewage discharge pipe. After the cleaned sewage flows into the connecting pipe, it can be discharged through the sewage discharge pipe. The structure arranged outside the heat exchanger body is simple in structure and convenient to operate, avoiding the problem of occupying the internal space of the heat exchanger body and affecting the heat exchange efficiency, and has strong practicability.

[0005] To achieve the above object, a low-temperature resistant plate heat exchanger is provided, which includes a heat exchanger body and a water inlet connected to the heat exchanger body. A connecting pipe is fixedly connected to the end of the water inlet. The other end of the connecting pipe is fixedly connected to a water delivery pipe. A rotatable frame in the shape of a ring is arranged inside the water delivery pipe. A filter screen is embedded inside the frame. A sewage discharge pipe is fixedly connected to the bottom of the connecting pipe. A plug is slidably connected to the inside of the sewage discharge pipe and close to one side of the connecting pipe. A control component connected to the plug is arranged at the top of the connecting pipe. The control component is used to control the up and down movement of the plug to realize the on-off of the sewage discharge pipe;

[0006] Two rotating shafts are symmetrically and fixedly connected to the outside of the frame. Both rotating shafts are rotatably connected to the inside of the water delivery pipe. A driving component for driving the rotating shafts to rotate is arranged on the outside of the water delivery pipe.

[0007] According to the above-mentioned low-temperature resistant plate heat exchanger, the driving component includes a fixed plate fixedly connected to the outside of the water delivery pipe, a rotating rod rotatably connected to the inside of the fixed plate, a worm fixedly connected to the end of the rotating rod, a worm gear meshed with the worm, and a knob fixedly connected to the other end of the rotating rod. Among them, the rotating shaft close to the fixed plate extends into the inside of the fixed plate and is fixedly connected to the worm gear.

[0008] According to the above-mentioned low-temperature resistant plate heat exchanger, the control component includes an internally threaded plate fixedly connected to the top of the connecting pipe and a screw rod threadedly connected to the inside of the internally threaded plate. The bottom of the screw rod extends into the inside of the connecting pipe and is rotatably connected to the top of the plug.

[0009] According to the above-mentioned low-temperature resistant plate heat exchanger, a valve is arranged on the outside of the connecting pipe and between the sewage discharge pipe and the water inlet.

[0010] According to the above-mentioned low-temperature resistant plate heat exchanger, two handles are symmetrically and fixedly connected to the top of the screw rod.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the prior art, for the above-mentioned low-temperature resistant plate heat exchanger, when the filter screen needs to be cleaned, the filter screen is driven to flip under the action of the arranged driving component, which is convenient for backwashing the filter screen. And the arranged control component can be used to drive the plug inside the sewage discharge pipe to separate from the sewage discharge pipe. The cleaned sewage flows into the connecting pipe and then can be discharged through the sewage discharge pipe. The structure arranged on the outside of the heat exchanger body is simple in structure and convenient to operate, avoiding the problem of occupying the internal space of the heat exchanger body and affecting the heat exchange efficiency, and has strong practicability.

[0013] The additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the utility model. Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0015] Figure 1 It is a schematic diagram of the overall structure of a low-temperature resistant plate heat exchanger of the present utility model;

[0016] Figure 2 It is a schematic diagram of the connection pipe, water delivery pipe and sewage discharge pipe of a low-temperature resistant plate heat exchanger of the present utility model;

[0017] Figure 3 It is a schematic diagram of the internal sectional structure of the water delivery pipe and the fixing plate of a low-temperature resistant plate heat exchanger of the present utility model;

[0018] Figure 4 It is a schematic diagram of the internal sectional structure of the connection pipe of a low-temperature resistant plate heat exchanger of the present utility model.

[0019] Legend:

[0020] 1. Heat exchanger body; 2. Water inlet; 3. Connection pipe; 4. Valve; 5. Water delivery pipe; 6. Frame; 7. Rotating shaft; 8. Fixing plate; 9. Worm gear; 10. Rotating rod; 11. Worm; 12. Knob; 13. Filter screen; 14. Sewage discharge pipe; 15. Plug; 16. Internal thread plate; 17. Screw; 18. Handle. Detailed Embodiment

[0021] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be construed as a limitation on the protection scope of the present utility model.

[0022] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, an embodiment of the utility model provides a low-temperature resistant plate heat exchanger, which includes a heat exchanger body 1 and a water inlet 2 connected to the heat exchanger body 1. One end of the water inlet 2 is fixedly connected to a connecting pipe 3, and the other end of the connecting pipe 3 is connected to a water delivery pipe 5. Inside the water delivery pipe 5, there is a rotatable ring-shaped frame 6. Inside the frame 6, a filter screen 13 is arranged. At the bottom of the connecting pipe 3, a sewage discharge pipe 14 is fixedly connected. Inside the sewage discharge pipe 14 and near one side of the connecting pipe 3, there is a slidable plug 15. At the top of the connecting pipe 3, there is a control component for controlling the up and down movement of the plug 15 to achieve the on-off of the sewage discharge pipe 14. Specifically, when the water delivery pipe 5, the connecting pipe 3, and the water inlet 2 are in a connected state, it can ensure that the liquid normally enters the heat exchanger body 1. When the liquid flows inside the water delivery pipe 5, the filter screen 13 can filter the liquid well under its action to prevent debris in the liquid from entering the heat exchanger body 1. And the rotatable frame 6 can drive the filter screen 13 to flip when cleaning the filter screen 13. The flipped filter screen 13 is conducive to backwashing work, ensuring the good filtering effect of the filter screen 13. When cleaning the filter screen 13, operate the control component to make the plug 15 move upward and separate from the sewage discharge pipe 14. After the cleaned sewage flows into the connecting pipe 3, it can be discharged through the sewage discharge pipe 14. The structure arranged outside the heat exchanger body 1 is simple in structure and convenient to operate, avoiding the problem of occupying the internal space of the heat exchanger body 1 and affecting the heat exchange efficiency, and has strong practicability.

[0023] Referring to Figure 1 , a valve 4 is arranged outside the connecting pipe 3 and between the sewage discharge pipe 14 and the water inlet 2. Specifically, during normal use, the valve 4 controls the normal flow of the connecting pipe 3. When cleaning the filter screen 13, the valve 4 controls the connecting pipe 3 to be in a disconnected state to prevent sewage from flowing into the water inlet 2 and polluting the inside of the heat exchanger body 1.

[0024] Referring to Figure 3 and Figure 4 , two rotating shafts 7 are symmetrically and fixedly connected to the outside of the frame 6. Both of the two rotating shafts 7 are rotatably connected to the inside of the water delivery pipe 5. A driving component is arranged outside the water delivery pipe 5 for driving the rotating shaft 7 to rotate. The driving component includes a fixing plate 8 fixedly connected to the outside of the water delivery pipe 5, a rotating rod 10 rotatably connected to the inside of the fixing plate 8, a worm 11 fixedly connected to the end of the rotating rod 10, a worm gear 9 meshed with the worm 11, and a knob 12 fixedly connected to the other end of the rotating rod 10. Among them, the rotating shaft 7 close to the fixing plate 8 extends into the inside of the fixing plate 8 and is fixedly connected to the worm gear 9. Specifically, rotating the knob 12 drives the rotating rod 10 to rotate. When the rotating rod 10 rotates, it drives the worm 11 to rotate, which can realize the rotation operation of the worm gear 9. Through the rotating worm gear 9, the rotation operation of the frame 6 can be realized to flip the filter screen 13. The flipped filter screen 13 is conducive to realizing the backwashing operation of the filter screen 13 to ensure the cleaning effect of the filter screen 13.

[0025] Referring to Figure 4 , the control assembly includes an internally threaded plate 16 fixed to the top of the connecting pipe 3 and a screw rod 17 threadedly connected within the internally threaded plate 16. The bottom of the screw rod 17 extends into the connecting pipe 3 and is rotatably connected to the top of the plug 15. Symmetrically fixed to the top of the screw rod 17 are two handles 18. Specifically, rotating the handle 18 drives the screw rod 17 to rotate. The rotation of the screw rod 17 can achieve the up and down movement operation of the screw rod 17 under the combined connection action of the internally threaded plate 16. When the screw rod 17 moves upward, it drives the plug 15 to move upward and separate from the sewage discharge pipe 14, and then the cleaning sewage can be discharged to the outside of the connecting pipe 3 through the sewage discharge pipe 14.

[0026] Working principle: The water delivery pipe 5, the connecting pipe 3 and the water inlet 2 are in a communicating state, which can ensure the normal passage of liquid into the heat exchanger body 1. When the liquid flows in the water delivery pipe 5, it can be well filtered by the filter screen 13 to prevent sundries in the liquid from entering the heat exchanger body 1.

[0027] When the filter screen 13 needs to be cleaned, rotate the knob 12 to drive the rotating rod 10 to rotate. The rotating rotating rod 10 drives the worm 11 to rotate, which can achieve the rotation operation of the worm gear 9. Through the rotating worm gear 9, the rotation operation of the frame 6 can be realized to turn over the filter screen 13. The turned-over filter screen 13 is conducive to the backwashing operation of the filter screen 13. At the same time, operate the valve 4 to control the connecting pipe 3 to be in a disconnected state. Rotate the handle 18 to drive the screw rod 17 to rotate. The rotation of the screw rod 17 can achieve the up and down movement operation of the screw rod 17 under the combined connection action of the internally threaded plate 16. When the screw rod 17 moves upward, it drives the plug 15 to move upward and separate from the sewage discharge pipe 14, and then the cleaning sewage can be discharged to the outside of the connecting pipe 3 through the sewage discharge pipe 14.

[0028] The structure provided on the outside of the heat exchanger body 1 is simple in structure and convenient to operate, avoiding the problem of occupying the internal space of the heat exchanger body 1 and affecting the heat exchange efficiency, and has strong practicability.

[0029] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A low temperature resistant plate heat exchanger, comprising a heat exchanger body (1) and a water inlet (2) connected to the heat exchanger body (1), characterized in that: The end of the water inlet (2) is fixedly connected to a connecting pipe (3), the other end of the connecting pipe (3) is fixedly connected to a water pipe (5), a rotatable frame (6) arranged in a circular ring structure is arranged inside the water pipe (5), a filter screen (13) is embedded inside the frame (6), a sewage pipe (14) is fixedly connected to the bottom of the connecting pipe (3), a plug (15) is slidably connected inside the sewage pipe (14) and on a side close to the connecting pipe (3), a control component connected to the plug (15) is arranged on the top of the connecting pipe (3), and the control component is used to control the plug (15) to move up and down to realize the opening and closing of the sewage pipe (14); Two rotating shafts (7) are symmetrically fixedly connected to the outer side of the frame (6), and the two rotating shafts (7) are both rotatably connected to the inside of the water pipe (5). A driving component for driving the rotating shafts (7) to rotate is arranged on the outer side of the water pipe (5).

2. The low temperature resistant plate heat exchanger according to claim 1, characterized in that: The driving assembly comprises a fixed plate (8) fixedly connected to the outside of the water pipe (5), a rotating rod (10) rotatably connected to the inside of the fixed plate (8), a worm (11) fixedly connected to the end of the rotating rod (10), a worm wheel (9) meshingly connected to the worm wheel (11), and a knob (12) fixedly connected to the other end of the rotating rod (10), wherein a rotating shaft (7) close to the fixed plate (8) extends to the inside of the fixed plate (8) and is fixedly connected to the worm wheel (9).

3. The low temperature resistant plate heat exchanger according to claim 2, characterized in that: The control assembly comprises an internal threaded plate (16) fixedly connected to the top of the connecting pipe (3) and a screw rod (17) threadedly connected to the inside of the internal threaded plate (16); the bottom of the screw rod (17) extends to the inside of the connecting pipe (3) and is rotatably connected to the top of the plug (15).

4. The low temperature resistant plate heat exchanger according to claim 3, characterized in that: A valve (4) is provided outside the connecting pipe (3) and between the sewage discharge pipe (14) and the water inlet (2).

5. The low temperature resistant plate heat exchanger according to claim 4, characterized in that: Two handles (18) are symmetrically fixedly connected to the top of the screw rod (17).

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