Self-cleaning plate heat exchanger

Abstract

The utility model discloses a self-cleaning plate heat exchanger, which belongs to the technical field of mechanical equipment and structurally comprises a top plate, a heat exchange plate, a hot side gasket, a cold side gasket, a cleaning brush, a screw and a nut. The screw rod penetrates through the through holes of the top plate, the heat exchange plate, the cold side gasket and the hot side gasket; the nut is arranged on the screw rod on the outer side of the top plate; during cleaning, a hand wheel of the cleaning brush can be manually rotated or a motor of the cleaning brush can be started without shutdown, so that the brush head moves left and right in the cold water chamber, pollutants are scraped off from the heat exchange plate through scraping of the brush head of the cleaning brush and are brought out along with water flowing out of the cold water chamber, and the heat exchange efficiency can be improved through the operation. And meanwhile, water flow in the cold water chamber can be smooth, the self-cleaning plate heat exchanger can be well cleaned, and operation of the self-cleaning plate heat exchanger does not need to be stopped.

Description

Technical Field

[0001] The utility model relates to a self-cleaning plate heat exchanger, belonging to the technical field of mechanical equipment, especially to the technical field of a plate heat exchanger that can self-clean. Background Art

[0002] The detachable plate heat exchanger, such as Figure 4 , Figure 5 shown in the figure: It is composed of a series of metal heat exchange plates with a certain corrugated shape and the top plates at both ends. The adjacent heat exchange plates are sealed by the gasket between the plates arranged around. The screw passes through the through holes of the top plate, and by tightening the nut, the heat exchange plates are stacked parallel between the top plates; Communicating with the hot water inlet short pipe and the hot water outlet short pipe, the space between the gasket between the plates and the heat exchange plates on both sides thereof is the hot water chamber; Communicating with the cold water inlet short pipe and the cold water outlet short pipe, the space between the gasket between the plates and the heat exchange plates on both sides thereof is the cold water chamber; The cold water chamber and the hot water chamber are arranged at intervals. The through holes at the four corners of the heat exchange plates form the hot water inlet channel, the hot water outlet channel, the cold water inlet channel and the cold water outlet channel. Through the opening and separation of the gasket between the plates, the hot and cold fluids are separated, so that the hot water inlet channel is communicated with the hot water inlet short pipe, the hot water outlet channel is communicated with the hot water outlet short pipe, the cold water inlet channel is communicated with the cold water inlet short pipe, and the cold water outlet channel is communicated with the cold water outlet short pipe. The hot water and the cold water flow in the hot water chamber and the cold water chamber respectively, and heat exchange is carried out through the heat exchange plates.

[0003] Deficiencies of the existing detachable plate heat exchanger:

[0004] I. Troublesome disassembly and cleaning, polluting the environment

[0005] When the fluid passing through the cold water chamber of the detachable plate heat exchanger contains a large amount of particulate matter, such as sewage containing organic sludge, the cold water chamber of the plate heat exchanger will soon be blocked by the organic sludge in the sewage. A large amount of organic sludge adheres to the heat exchange plates, reducing the flow rate of the cold water chamber and the heat exchange efficiency. At this time, it is necessary to manually disassemble the heat exchange plates and wash the sludge on the heat exchange plates with water. Not only is the disassembly troublesome, and each heat exchange plate needs to be manually disassembled and rinsed, but also it needs to be installed back in the original way. If not careful during installation, it will cause the plate heat exchanger to leak. Moreover, the organic sludge in the sewage often contains toxic gases, germs, etc., which not only pollute the environment but also affect the health of the operating workers.

[0006] II. Affecting operation

[0007] When the heat exchange plates are manually disassembled and the contaminants on the heat exchange plates are cleaned with water, the plate heat exchanger is bound to stop running. For example, when the plate heat exchanger used in the sewage treatment system is cleaned, since the plate heat exchanger cannot be used, it may cause the sewage treatment system to stop running. If the time is too long and the collected sewage cannot be treated in time, it will affect the normal operation of the sewage treatment system. Summary of the Invention

[0008] In order to solve the deficiencies of the prior art, the utility model provides a self-cleaning plate heat exchanger, which can clean the equipment without disassembly and without stopping operation.

[0009] The technical solution of the utility model to solve the above problems is: a self-cleaning plate heat exchanger, the structure of which includes a top plate, heat exchange plates, hot-side gaskets, cold-side gaskets, cleaning brushes, screws and nuts; there are two top plates, with a through hole set every 10 mm to 300 mm around the perimeter, and the distance from the through hole to the edge of the top plate is 10 mm to 250 mm; the heat exchange plates are arranged between the two top plates, with the four sides flush with the top plates, and a through hole is set every 10 mm to 300 mm around the perimeter, and the distance from the through hole to the edge of the heat exchange plate is 10 mm to 250 mm; the hot-side gaskets are arranged inside the four sides of the heat exchange plates, with through holes of the same diameter as the heat exchange plates set, and at the hot water inlet channel and the hot water outlet channel, the outer edges of the hot-side gaskets are flush with the edges of the heat exchange plates, and openings are set at the hot water inlet channel and the hot water outlet channel; the cold-side gaskets are arranged inside the four sides of the heat exchange plates, with through holes of the same diameter as the heat exchange plates set, and at the cold water inlet channel and the cold water outlet channel, the outer edges of the cold-side gaskets are flush with the edges of the heat exchange plates, and openings are set at the cold water inlet channel and the cold water outlet channel, and two push-pull rod holes are set on the left or right side, and sealing rings are set on the push-pull rod holes; the screws pass through the through holes of the top plates, heat exchange plates, cold-side gaskets and hot-side gaskets, and the nuts are arranged on the screws outside the top plates; the hot water inlet short pipe and the cold water inlet short pipe are arranged at the top of the self-cleaning plate heat exchanger, and the hot water outlet short pipe and the cold water outlet short pipe are arranged at the bottom of the self-cleaning plate heat exchanger; the cleaning brush includes a brush head, a connecting plate, a bracket, a push-pull rod, a screw and a nut, a handwheel or an electric mechanism, the brush head is vertically arranged inside the cold-side gasket, the bracket is connected to the top plate by bolts, the push-pull rod passes through the push-pull rod hole of the cold-side gasket, one end is connected to the brush head, the other end is connected to the connecting plate, one end of the screw is connected to the connecting plate, the nut is arranged on the screw, the outer side of the nut is rotatably connected to the bracket and fixedly connected to the handwheel, the electric mechanism includes a left limit switch, a right limit switch, a pair of gears and a motor, the left limit switch and the right limit switch are connected to the bracket, one gear is fixedly arranged outside the nut, the other gear is arranged on the shaft of the motor, the motor is fixedly connected to the bracket, and the gear outside the nut is meshed with the gear on the motor.

[0010] The above-mentioned hot water inlet short pipe and the top plate are connected by bolts, and a washer is arranged between the hot water inlet short pipe and the top plate.

[0011] The above-mentioned cold water inlet short pipe and the top plate are connected by bolts, and a washer is arranged between the cold water inlet short pipe and the top plate.

[0012] The above-mentioned hot water outlet short pipe and the top plate are connected by bolts, and a washer is arranged between the hot water outlet short pipe and the top plate.

[0013] The above-mentioned cold water outlet short pipe and the top plate are connected by bolts, and a washer is arranged between the cold water outlet short pipe and the top plate.

[0014] Its beneficial effects are as follows:

[0015] When the self-cleaning plate heat exchanger of the present utility model operates, impurities contained in the water to be heated adhere to the heat exchange plates, resulting in a smaller space in the cold water chamber and a decrease in heat exchange efficiency. At this time, without stopping the machine, the handwheel of the cleaning brush can be manually rotated or the motor of the cleaning brush can be started, so that the brush head moves left and right in the cold water chamber. Through the scraping of the cleaning brush head, the pollutants are scraped off from the heat exchange plates and are carried out with the water flowing out of the cold water chamber. By operating like this, the heat exchange efficiency can be restored, and at the same time, the water flow in the cold water chamber can be made smooth. It can not only clean the self-cleaning plate heat exchanger of the present utility model well, but also does not need to stop the operation of the self-cleaning plate heat exchanger of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The self-cleaning plate heat exchanger of the present utility model will be further described in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 is a schematic diagram of the front of the self-cleaning plate heat exchanger of the present utility model.

[0018] Figure 2 is a schematic diagram of the heat exchange plates and the hot side gaskets of the self-cleaning plate heat exchanger of the present utility model.

[0019] Figure 3 is a schematic diagram of the heat exchange plates, the cold side gaskets and the cleaning brush of the self-cleaning plate heat exchanger of the present utility model.

[0020] Figure 4 is a schematic diagram of a plate heat exchanger in the prior art.

[0021] Figure 5 is a schematic diagram of the heat exchange plates and the inter-sheet gaskets of a plate heat exchanger in the prior art.

[0022] In the figure, 1 is the top plate, 2 is the heat exchange plate, 3 is the hot side washer, 4 is the cold side washer, 5 is the bolt, 6 is the through hole, 7 is the short pipe for the hot water inlet, 8 is the short pipe for the cold water inlet, 9 is the short pipe for the hot water outlet, 10 is the short pipe for the cold water outlet, 11 is the opening, 12 is the brush head, 13 is the bracket, 14 is the push-pull rod, 15 is the connecting plate, 16 is the handwheel, 17 is the screw rod, 18 is the nut, 19 is the left limit switch, 20 is the right limit switch, 21 is the motor, 22 is the gear, 23 is the corrugation, 24 is the hot water inlet channel, 25 is the hot water outlet channel, 26 is the cold water inlet channel, 27 is the cold water outlet channel, 28 is the washer between plates, 29 is the hole for the push-pull rod. Detailed implementation mode

[0023] The principle and operation process of the self-cleaning plate heat exchanger of the present utility model will be described in detail below in conjunction with the accompanying drawings:

[0024] A self-cleaning plate heat exchanger, such as Figure 1 , Figure 2 , Figure 3As shown in the figure, its structure includes a top plate, heat exchange plates, hot-side gaskets, cold-side gaskets, cleaning brushes, screws and nuts; there are two top plates, with a through hole set at intervals of 10 mm to 300 mm around the perimeter, and the distance from the through hole to the edge of the top plate is 10 mm to 250 mm; the heat exchange plates are arranged between the two top plates, with the four sides flush with the top plates, and a through hole is set at intervals of 10 mm to 300 mm around the perimeter, and the distance from the through hole to the edge of the heat exchange plates is 10 mm to 250 mm; the hot-side gaskets are arranged on the inner sides of the four sides of the heat exchange plates, with through holes of the same diameter as the heat exchange plates set, and at the hot water inlet channel and the hot water outlet channel, the outer edges of the hot-side gaskets are flush with the edges of the heat exchange plates, and openings are set at the hot water inlet channel and the hot water outlet channel; the cold-side gaskets are arranged on the inner sides of the four sides of the heat exchange plates, with through holes of the same diameter as the heat exchange plates set, and at the cold water inlet channel and the cold water outlet channel, the outer edges of the cold-side gaskets are flush with the edges of the heat exchange plates, and openings are set at the cold water inlet channel and the cold water outlet channel, and two push rod holes are set on the left or right side, and sealing rings are set on the push rod holes; the screws pass through the through holes of the top plates, heat exchange plates, cold-side gaskets and hot-side gaskets, and the nuts are arranged on the screws outside the top plates; the hot water inlet short pipe and the cold water inlet short pipe are arranged at the top of the self-cleaning plate heat exchanger, and the hot water outlet short pipe and the cold water outlet short pipe are arranged at the bottom of the self-cleaning plate heat exchanger; the cleaning brush includes a brush head, a connecting plate, a bracket, a push rod, a screw and a nut, a hand wheel or an electric mechanism, the brush head is vertically arranged on the inner side of the cold-side gasket, the bracket is connected to the top plate by bolts, the push rod passes through the push rod hole of the cold-side gasket, one end is connected to the brush head, the other end is connected to the connecting plate, one end of the screw is connected to the connecting plate, the nut is arranged on the screw, the outer side of the nut is rotatably connected to the bracket and fixedly connected to the hand wheel, the electric mechanism includes a left limit switch, a right limit switch, a pair of gears and a motor, the left limit switch and the right limit switch are connected to the bracket, one gear is fixedly arranged on the outer side of the nut, the other gear is arranged on the shaft of the motor, the motor is fixedly connected to the bracket, and the gear on the outer side of the nut is meshed and connected with the gear on the motor.

[0025] The above-mentioned hot water inlet short pipe is connected to the top plate by bolts, and a gasket is arranged between the hot water inlet short pipe and the top plate.

[0026] The above-mentioned cold water inlet short pipe is connected to the top plate by bolts, and a gasket is arranged between the cold water inlet short pipe and the top plate.

[0027] The above-mentioned hot water outlet short pipe is connected to the top plate by bolts, and a gasket is arranged between the hot water outlet short pipe and the top plate.

[0028] The above-mentioned cold water outlet short pipe is connected to the top plate by bolts, and a gasket is arranged between the cold water outlet short pipe and the top plate.

[0029] Embodiment

[0030] Operation and cleaning of the self-cleaning plate heat exchanger of the present utility model:

[0031] During operation, the hot water inlet short pipe of the self-cleaning plate heat exchanger of the present utility model is connected to the hot water supply equipment through a pipeline, the cold water inlet short pipe is connected to the cold water container to be heated through a pipeline, the hot water outlet short pipe is connected to the hot water supply equipment through a pipeline, and the cold water outlet short pipe is connected to the cold water container to be heated through a pipeline; the hot water flows along the pipeline under the power of the water pump, and then enters the hot water chamber of the self-cleaning plate heat exchanger of the present utility model through the hot water inlet short pipe. The cold water flows along the pipeline under the power of the water pump and enters the cold water chamber adjacent to the hot water chamber through the cold water inlet short pipe. The hot water and the cold water flow in the hot water chamber and the cold water chamber respectively, and heat exchange is carried out through the heat exchange plates. After the heat and cold exchange is completed, the water in the hot water chamber flows out from the hot water outlet short pipe and returns to the heating equipment through the pipeline for reheating. The water in the cold water chamber flows out from the cold water outlet short pipe and returns to the cold water container through the pipeline. By repeating the above operations, the heating of the cold water in the cold water container can be realized. When the water in the cold water container contains a lot of impurities, such as domestic sewage containing organic sludge, these organic sludges are easily attached to the heat exchange plates, blocking the cold water chamber and reducing the heat exchange efficiency of the heat exchanger. At this time, there is no need to stop the operation of the self-cleaning plate heat exchanger of the present utility model. The operator only needs to turn the handwheel of the cleaning brush. The handwheel drives the screw to move, so that the brush head moves forward to the leftmost side of the cold water chamber, and then reversely rotates the handwheel to make the brush head move backward to the rightmost side of the cold water chamber. Repeat the operation two to three times, and the organic sludge attached to the heat exchange plates in the cold water chamber can be scraped off and then flows out from the cold water outlet short pipe through the water flow. Or start the motor of the cleaning brush. When the motor rotates forward, the motor rotates to drive the gear to rotate, and the gear drives the screw to move, so that the brush head moves forward to the leftmost side of the cold water chamber. At this time, the connecting plate touches the left limit switch, causing the motor to stop rotating forward, and then rotates reversely to make the brush head move backward to the rightmost side of the cold water chamber. At this time, the connecting plate touches the right limit switch, causing the motor to stop rotating reversely, and then rotates forward. Repeat the operation two to three times, and the organic sludge attached to the heat exchange plates in the cold water chamber can be scraped off. Then stop the motor operation. In this way, the self-cleaning plate heat exchanger of the present utility model can be cleaned without disassembling the heat exchanger, so that its water throughput and heat exchange efficiency are restored.

[0032] The orientation terms mentioned in this specification, such as top, bottom, left, and right, are for the convenience of description and cannot be used as a limitation to the present utility model. For example, the hot water inlet short pipe can be arranged at the top, or at the bottom, or on the left or right side. When the position of the hot water inlet short pipe is adjusted, the other inlet and outlet short pipes and the cleaning brush are also adjusted according to the rules mentioned in this specification.

[0033] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A self-cleaning plate heat exchanger, mainly composed of a top plate, a heat exchange plate and a cleaning brush, characterized in that: Its structure includes a top plate, a heat exchange plate, a hot side gasket, a cold side gasket, a cleaning brush, a screw and a nut; the top plate is composed of two pieces, a through hole is set at a perimeter interval of 10 mm to 300 mm, and the distance between the through hole and the edge of the top plate is 10 mm to 250 mm; the heat exchange plate is set between the two top plates, the four sides are flush with the top plates, a through hole is set at a perimeter interval of 10 mm to 300 mm, and the distance between the through hole and the edge of the heat exchange plate is 10 mm to 250 mm; the hot side gasket is set on the inner side of the four sides of the heat exchange plate, and is set with Through holes with the same diameter as the heat exchange plate, the outer edge of the hot side gasket at the hot water inlet and outlet channels is flush with the edge of the heat exchange plate, and openings are set at the hot water inlet and outlet channels; the cold side gasket is set on the inner side of the four sides of the heat exchange plate, and through holes with the same diameter as the heat exchange plate are set, the outer edge of the cold side gasket at the cold water inlet and outlet channels is flush with the edge of the heat exchange plate, and openings are set at the cold water inlet and outlet channels. Two push-pull rod holes are set on the left or right side, and sealing rings are set on the push-pull rod holes; screw The rod passes through the through holes of the top plate, the heat exchange plate, the cold side gasket and the hot side gasket, and the nut is arranged on the screw on the outside of the top plate; the short pipe of the hot water inlet and the short pipe of the cold water inlet are arranged on the top of the self-cleaning plate heat exchanger, and the short pipe of the hot water outlet and the short pipe of the cold water outlet are arranged at the bottom of the self-cleaning plate heat exchanger; the cleaning brush includes a brush head, a connecting plate, a bracket, a push-pull rod, a screw and a nut, a hand wheel or an electric mechanism, the brush head is vertically arranged on the inner side of the cold side gasket, the bracket is connected to the top plate by bolts, and the push-pull rod passes through the push-pull rod of the cold side gasket A hole is provided, one end of the screw is connected to the brush head, the other end is connected to the connecting plate, one end of the screw is connected to the connecting plate, a nut is arranged on the screw, the outer side of the nut is rotatably connected to the bracket, and is fixedly connected to the hand wheel, the electric mechanism comprises a left limit switch, a right limit switch, a pair of gears and a motor, the left limit switch and the right limit switch are connected to the bracket, one gear is fixedly arranged on the outer side of the nut, the other gear is arranged on the shaft of the motor, the motor is fixedly connected to the bracket, and the gear on the outer side of the nut is meshed with the gear on the motor.

2. The self-cleaning plate heat exchanger according to claim 1, characterized in that: The short pipe of the hot water inlet is connected to the top plate by bolts, and a gasket is arranged between the short pipe of the hot water inlet and the top plate.

3. The self-cleaning plate heat exchanger according to claim 1, characterized in that: The short cold water inlet pipe is connected to the top plate by bolts, and a gasket is arranged between the short cold water inlet pipe and the top plate.

4. The self-cleaning plate heat exchanger according to claim 1, characterized in that: The short pipe of the hot water outlet is connected to the top plate by bolts, and a gasket is arranged between the short pipe of the hot water outlet and the top plate.

5. The self-cleaning plate heat exchanger according to claim 1, characterized in that: The short cold water outlet pipe is connected to the top plate by bolts, and a gasket is arranged between the short cold water outlet pipe and the top plate.

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