Self-cleaning plate heat exchanger with built-in slide bar

Abstract

The application discloses a self-cleaning plate heat exchanger with a built-in sliding rod and belongs to the technical field of heat exchange equipment, and the structure of the self-cleaning plate heat exchanger comprises a top plate, heat exchange plates, a hot side gasket, a cold side gasket, a cleaning brush, a sliding rod, a screw rod, a nut and a hydraulic mechanism; the screw rod passes through the through holes of the top plate, the heat exchange plates, the cold side gasket and the hot side gasket and is fixed by the tightening of the nut; during cleaning, the handle can be manually pushed and pulled or the hydraulic mechanism is 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 taken out along with the water flowing out of the cold water chamber; the operation can make the heat exchange efficiency recover and the water flow in the cold water chamber smooth, so that the self-cleaning plate heat exchanger with the built-in sliding rod can be well cleaned and the operation of the self-cleaning plate heat exchanger with the built-in sliding rod can be stopped.

Description

Technical Field

[0001] This invention relates to a plate heat exchanger, belonging to the technical field of heat exchange equipment, and particularly to a self-cleaning plate heat exchanger. Background Technology

[0002] Detachable plate heat exchangers, such as Figure 5 , Figure 6 As shown: It consists of a series of corrugated metal heat exchange plates and top plates at both ends. Adjacent heat exchange plates are sealed by gaskets around the perimeter. A screw passes through a through hole in the top plate, and by tightening the nut, the heat exchange plates are stacked parallel to each other between the top plates. The space between the gaskets and the heat exchange plates on both sides, which is connected to the hot water inlet and outlet short pipes, forms the hot water chamber. The space between the gaskets and the heat exchange plates on both sides, which is connected to the cold water inlet and outlet short pipes, forms the hot water chamber. The system consists of a cold water chamber and a hot water chamber. The through holes at the four corners of the heat exchange plates form hot water inlet and outlet channels, as well as cold water inlet and outlet channels. The hot and cold fluids are separated by the opening and closing of the gaskets between the plates. The hot water inlet channel is connected to the hot water inlet pipe, the hot water outlet channel is connected to the hot water outlet pipe, the cold water inlet channel is connected to the cold water inlet pipe, and the cold water outlet channel is connected to the cold water outlet pipe. Hot water and cold water flow in the hot water chamber and the cold water chamber respectively, and exchange heat through the heat exchange plates.

[0003] The shortcomings of existing detachable plate heat exchangers:

[0004] 1. Disassembly and cleaning are troublesome and pollute the environment.

[0005] When the fluid flowing through the cold water chamber of a 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 quickly become clogged by the organic sludge in the sewage. The large amount of organic sludge adheres to the heat exchange plates, reducing the flow rate of the cold water chamber and decreasing the heat exchange efficiency. At this time, it is necessary to manually disassemble the heat exchange plates and wash the sludge off the heat exchange plates with water. Not only is disassembly troublesome, requiring manual disassembly and rinsing of each heat exchange plate, but it also needs to be reinstalled in its original state. Careless installation can easily cause the plate heat exchanger to leak. Moreover, the organic sludge in the sewage often contains toxic gases and bacteria, which not only pollute the environment but also affect the health of the operators.

[0006] II. Impact on Operation

[0007] When the heat exchange plates are manually disassembled and cleaned with water to remove contaminants, the plate heat exchanger will inevitably stop operating. For example, in a wastewater treatment system, the plate heat exchanger may stop operating because it cannot be used during cleaning. If this happens for too long, the collected wastewater will not be treated in time, which will affect the normal operation of the wastewater treatment system. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a self-cleaning plate heat exchanger with a built-in slide bar, which allows for cleaning without disassembly or stopping operation.

[0009] The technical solution of this invention to solve the above problems is: a self-cleaning plate heat exchanger with a built-in slide bar, the structure of which includes a top plate, heat exchange plates, hot-side gaskets, cold-side gaskets, a cleaning brush, a screw, a slide bar, a nut, and a push-pull unit; the top plate consists of two pieces, square or rectangular, with a through hole spaced 10 mm to 300 mm apart around the perimeter, the distance between the through hole and the edge of the top plate being 10 mm to 250 mm; the heat exchange plates are square or rectangular, disposed between the two top plates, with their four sides flush with the top plates, and a through hole spaced 10 mm to 300 mm apart around the perimeter, the distance between the through hole and the edge of the heat exchange plate being 10 mm to 250 mm; the hot-side gaskets are disposed on the inner side of the four sides of the heat exchange plates, and are positioned in conjunction with the heat exchange... The heat exchange plates have through holes of the same diameter. At the hot water inlet and outlet channels, the outer edge of the hot-side gasket is flush with the edge of the heat exchange plate, and openings are provided at these channels. The cold-side gaskets are located on the inner sides of the four sides of the heat exchange plates, with through holes of the same diameter. At the cold water inlet and outlet channels, the outer edge of the cold-side gasket is flush with the edge of the heat exchange plate, and openings are provided at these channels. Two push-pull rod holes are provided on the left or right side, and sealing rings are installed in these holes. A screw passes through the through holes in the top plate, heat exchange plates, cold-side gaskets, and hot-side gaskets, and is secured by tightening a nut. Short pipes for hot and cold water inlets are located on the top of the top plate and heat exchange plates. The hot water outlet short pipe and cold water outlet short pipe are located at the bottom of the top plate and heat exchange plates; the cleaning brush includes a brush head and a push-pull rod; the push-pull unit includes a handle and a hydraulic mechanism. The brush head has two through holes, vertically positioned inside the cold-side gasket. The push-pull rod passes through the push-pull rod hole in the cold-side gasket, with one end connected to the brush head and the other end connected to the handle or the connecting plate. Two sliding rods are located above and below the push-pull rod, or between the two push-pull rods, parallel to them, passing through the through holes on the brush head and fixedly connected to the cold-side gasket at both ends. The bracket is connected to the top plate by bolts. The connecting plate is connected to the front of the telescopic rod of the hydraulic mechanism. The hydraulic mechanism includes a telescopic rod, a hydraulic oil tank, and a hydraulic... The hydraulic pump and hydraulic cylinder are arranged in a hydraulic cylinder. The rear part of the telescopic rod is located inside the hydraulic cylinder, which is fixedly connected to the bracket. The rear part of the hydraulic cylinder is connected to one end of the inlet and outlet oil manifold. The other end of the inlet and outlet oil manifold is connected to the forward push oil pipe and the retraction inlet oil pipe, respectively. A forward push oil valve is installed on the forward push oil pipe, and a retraction oil inlet valve is installed on the retraction inlet oil pipe. The forward push oil pipe is connected to the oil pump outlet manifold. One end of the retraction outlet oil pipe is connected to the oil pump outlet manifold, and the other end is located in the hydraulic oil tank. The retraction outlet oil valve is located on the retraction outlet oil pipe. The retraction inlet oil pipe is connected to the oil pump inlet manifold. One end of the forward push oil pipe is located in the hydraulic oil tank, and the other end is connected to the oil pump inlet manifold. The forward push oil valve is located on the forward push oil pipe.

[0010] Its beneficial effects are:

[0011] When the self-cleaning plate heat exchanger with built-in slide rod of this invention is running, impurities in the water to be heated adhere to the heat exchange plates, causing the cold water chamber space to shrink and the heat exchange efficiency to decrease. At this time, without stopping the machine, the handle can be manually pushed or pulled or the hydraulic mechanism can be activated to move the brush head left and right in the cold water chamber. Through the scraping of the cleaning brush head, the contaminants are scraped off from the heat exchange plates and carried out with the water flowing out of the cold water chamber. This operation can restore the heat exchange efficiency and at the same time ensure smooth water flow in the cold water chamber. It can effectively clean the self-cleaning plate heat exchanger with built-in slide rod of this invention without stopping the operation of the self-cleaning plate heat exchanger with built-in slide rod of this invention. Attached Figure Description

[0012] The self-cleaning plate heat exchanger with built-in slide bar of the present invention will be further described with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the front of the self-cleaning plate heat exchanger with built-in slide bar of the present invention.

[0014] Figure 2 This is a schematic diagram of the heat exchange plates and hot-side gaskets of the self-cleaning plate heat exchanger with built-in slide rod of the present invention.

[0015] Figure 3 This is a schematic diagram of the heat exchange plates, cold-side gasket, slide bar, handle, and cleaning brush of the self-cleaning plate heat exchanger with built-in slide bar of the present invention.

[0016] Figure 4 This is a partial schematic diagram of the hydraulic mechanism and push-pull rod of the self-cleaning plate heat exchanger with built-in slide rod of the present invention. The front part of the hydraulic oil tank has been removed from the figure.

[0017] Figure 5 This is a schematic diagram of an existing plate heat exchanger.

[0018] Figure 6 This is a schematic diagram of the heat exchange plates and gaskets between plates in an existing plate heat exchanger.

[0019] In the diagram, 1 is the top plate, 2 is the heat exchange plate, 3 is the hot-side gasket, 4 is the cold-side gasket, 5 is the bolt, 6 is the through hole, 7 is the hot water inlet pipe, 8 is the cold water inlet pipe, 9 is the hot water outlet pipe, 10 is the cold water outlet pipe, 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 handle, 17 is the screw, 18 is the oil pump outlet manifold, 19 is the forward push oil valve, 20 is the forward push oil valve, and 21 is the retractable inlet oil valve. Door, 22 is the retraction oil outlet valve, 23 is the corrugated type, 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 inter-plate washer, 29 is the push-pull rod hole, 30 is the slide rod, 31 is the telescopic rod, 32 is the hydraulic oil tank, 33 is the hydraulic oil pump, 34 is the hydraulic cylinder, 35 is the main inlet and outlet oil pipe, 36 is the forward push oil pipe, 37 is the retraction inlet oil pipe, 38 is the retraction outlet oil pipe, 39 is the forward push oil pipe, 40 is the main oil pump inlet pipe. Detailed Implementation

[0020] The principle and operation of the self-cleaning plate heat exchanger with built-in slide bar of the present invention will be described in detail below with reference to the accompanying drawings:

[0021] A self-cleaning plate heat exchanger with built-in slide bar, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, its structure includes a top plate, heat exchange plates, hot-side washers, cold-side washers, a cleaning brush, a screw, a sliding rod, a nut, and a push-pull unit. The top plate consists of two pieces, square or rectangular, with a through hole spaced 10 mm to 300 mm apart around its perimeter. The distance between the through hole and the edge of the top plate is 10 mm to 250 mm. The heat exchange plates are square or rectangular, positioned between the two top plates, flush with their four sides. A through hole is also spaced 10 mm to 300 mm around their perimeter, with the distance between the through hole and the edge of the heat exchange plate is 10 mm to 250 mm. The hot-side washers are located on the inner side of the four sides of the heat exchange plates, with through holes of the same diameter as the heat exchange plates. Hot water inlet and outlet channels are also included. The outer edge of the hot-side gasket is flush with the edge of the heat exchange plate, and openings are provided at the hot water inlet and outlet channels. The cold-side gasket is located on the inner side of the four sides of the heat exchange plate, with through holes of the same diameter as the heat exchange plate. The outer edge of the cold-side gasket is flush with the edge of the heat exchange plate at the cold water inlet and outlet channels. Two push-pull rod holes are provided on the left or right side, and sealing rings are installed on the push-pull rod holes. A screw passes through the through holes of the top plate, heat exchange plate, cold-side gasket, and hot-side gasket, and is secured by tightening a nut. Hot water inlet short pipes and cold water inlet short pipes are located on the top of the top plate and heat exchange plate, and hot water outlet short pipes and cold water outlet short pipes are also provided. The cleaning brush is installed at the bottom of the top plate and heat exchange plates. It includes a brush head and a push-pull rod. The push-pull unit includes a handle and a hydraulic mechanism. The brush head has two through holes, vertically positioned inside the cold-side gasket. The push-pull rod passes through the push-pull rod hole in the cold-side gasket, with one end connected to the brush head and the other end connected to the handle or the connecting plate. Two sliding rods are installed above and below the push-pull rod, or between the two rods, parallel to them. They pass through the through holes on the brush head and are fixedly connected to the cold-side gasket at both ends. The bracket is bolted to the top plate. The connecting plate is connected to the front of the telescopic rod of the hydraulic mechanism. The hydraulic mechanism includes a telescopic rod, a hydraulic oil tank, a hydraulic pump, and a hydraulic cylinder. The rear of the telescopic rod is installed inside the hydraulic cylinder, which is fixedly connected to the bracket. The rear of the hydraulic cylinder is connected to one end of the inlet and outlet oil manifold, and the other end of the inlet and outlet oil manifold is connected to the forward push oil pipe and the retraction inlet oil pipe, respectively. A forward push oil valve is installed on the forward push oil pipe, and a retraction inlet oil valve is installed on the retraction inlet oil pipe. The forward push oil pipe is connected to the oil pump outlet manifold. One end of the retraction outlet oil pipe is connected to the oil pump outlet manifold, and the other end is installed in the hydraulic oil tank. The retraction outlet oil valve is installed on the retraction outlet oil pipe. The retraction inlet oil pipe is connected to the oil pump inlet manifold. One end of the forward push oil pipe is installed in the hydraulic oil tank, and the other end is connected to the oil pump inlet manifold. The forward push oil valve is installed on the forward push oil pipe.

[0022] Example

[0023] Operation and cleaning of the self-cleaning plate heat exchanger with built-in slide bar of this invention:

[0024] During operation, the hot water inlet short pipe of the self-cleaning plate heat exchanger with built-in slide rod of this invention is connected to the hot water supply equipment via a pipe, the cold water inlet short pipe is connected to the cold water container that needs to be heated via a pipe, the hot water outlet short pipe is connected to the hot water supply equipment via a pipe, and the cold water outlet short pipe is connected to the cold water container that needs to be heated via a pipe. Hot water flows along the pipe under the power of the water pump, and then enters the hot water chamber of the self-cleaning plate heat exchanger with built-in slide rod of this invention through the hot water inlet short pipe. Cold water flows along the pipe 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. Hot water and cold water are respectively in the hot water chamber. The water flows in the cold water chamber and exchanges heat through the heat exchange plates. After the heat exchange is complete, the water in the hot water chamber flows out from the hot water outlet short pipe and returns to the heating equipment 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 pipe. Repeating the above operation can heat the cold water in the cold water container. When the water in the cold water container contains a lot of impurities, such as domestic sewage containing organic sludge, this organic sludge can easily adhere to the heat exchange plates, clogging the cold water chamber and reducing the heat exchange efficiency of the heat exchanger. In this case, it is not necessary to stop the operation of the self-cleaning plate heat exchanger with built-in slide rod of this invention. Figure 1 , Figure 3 As shown: Operators simply need to push and pull the handle to extend the brush head forward and pull it back to its original position in a single cold water chamber. Repeating this operation two to three times will scrape off the organic sludge adhering to the heat exchange plates in that single cold water chamber. By pushing and pulling the handles connecting all the brush heads two to three times, all cold water chambers will be cleaned. Alternatively, the hydraulic mechanism can be activated and the operation repeated two to three times. Figure 4 As shown: Organic sludge adhering to the heat exchange plates in the cold water chamber can also be scraped off. The hydraulic mechanism's propulsion operation steps are: open the forward thrust valve, open the forward push valve, close the retraction inlet valve, close the retraction outlet valve, start the hydraulic pump, and the hydraulic oil in the hydraulic tank enters the hydraulic pump along the forward thrust pipe and the pump inlet manifold. Powered by the hydraulic pump, the hydraulic oil flows out from the pump outlet manifold, then through the forward push pipe and the inlet / outlet manifold into the hydraulic cylinder. According to Pascal's principle, this pushes the telescopic rod. The forward movement and the retraction operation of the hydraulic mechanism are as follows: close the forward thrust valve, close the forward push valve, open the retraction inlet valve, open the retraction outlet valve, start the hydraulic oil pump, and the hydraulic oil in the hydraulic cylinder flows along the inlet and outlet manifolds and the retraction inlet pipe to the pump inlet manifold and then enters the hydraulic oil pump inlet. With the power of the hydraulic oil pump, the hydraulic oil flows out from the pump outlet manifold, flows through the retraction outlet pipe to the hydraulic oil tank, and after all the hydraulic oil in the hydraulic cylinder has flowed into the hydraulic oil tank, the telescopic rod retracts to its original position.

[0025] This allows the self-cleaning plate heat exchanger with built-in slide bar of the present invention to be cleaned without disassembling the heat exchanger, restoring its water flow and heat exchange efficiency.

[0026] The directional terms used in this specification, such as top, bottom, left, and right, are for ease of description and should not be construed as limiting the invention.

[0027] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A self-cleaning plate heat exchanger with built-in sliding rod, which is an improvement on the plate heat exchanger, mainly composed of a top plate, heat exchange plates and a cleaning brush, characterized in that: Its structure includes a top plate, heat exchange plates, hot-side washers, cold-side washers, a cleaning brush, a screw, a sliding rod, a nut, and a push-pull unit. The top plate consists of two pieces, square or rectangular, with a through hole spaced 10 mm to 300 mm apart around the perimeter. The distance between the through hole and the edge of the top plate is 10 mm to 250 mm. The heat exchange plates are square or rectangular, positioned between the two top plates, flush with all four sides. A through hole is also spaced 10 mm to 300 mm around the perimeter, with the distance between the through hole and the edge of the heat exchange plate is 10 mm to 250 mm. The hot-side washers are located on the inner side of the four sides of the heat exchange plates, with through holes of the same diameter as the heat exchange plates. They are used at the hot water inlet and outlet channels. The outer edge of the side washer is flush with the edge of the heat exchange plate, and openings are provided at the hot water inlet and outlet channels. The cold side washer is located on the inner side of the four sides of the heat exchange plate, with through holes of the same diameter as the heat exchange plate. Openings are provided at the cold water inlet and outlet channels. Two push-pull rod holes are provided on the left or right side, and sealing rings are installed on the push-pull rod holes. A screw passes through the through holes of the top plate, heat exchange plate, cold side washer, and hot side washer, and is secured by tightening nuts. Hot water inlet short pipes and cold water inlet short pipes are located on the top of the top plate and heat exchange plate, and hot water outlet short pipes and cold water outlet short pipes are located on the top of the top plate and heat exchange plate. The cleaning brush is placed at the bottom of the top plate and heat exchange plates. It includes a brush head and a push-pull rod. The push-pull unit includes a handle and a hydraulic mechanism. The brush head has two through holes, vertically positioned inside the cold-side gasket. The push-pull rod passes through the push-pull rod hole in the cold-side gasket, with one end connected to the brush head and the other end connected to the handle or the connecting plate. Two sliding rods are positioned above and below the push-pull rod, or between the two push-pull rods, parallel to them. They pass through the through holes on the brush head and are fixedly connected to the cold-side gasket at both ends. The bracket is bolted to the top plate. The connecting plate is connected to the front of the telescopic rod of the hydraulic mechanism. The hydraulic mechanism includes a telescopic rod, a hydraulic oil tank, a hydraulic pump, and a hydraulic cylinder. The rear of the telescopic rod is housed inside a hydraulic cylinder, which is fixedly connected to a bracket. The rear of the hydraulic cylinder is connected to one end of the inlet and outlet manifold, while the other end of the manifold is connected to the forward extension oil pipe and the retraction inlet oil pipe, respectively. A forward extension valve is installed on the forward extension oil pipe, and a retraction inlet oil valve is installed on the retraction inlet oil pipe. The forward extension oil pipe is connected to the oil pump outlet manifold. One end of the retraction outlet oil pipe is connected to the oil pump outlet manifold, and the other end is located in the hydraulic oil tank. A retraction outlet valve is installed on the retraction outlet oil pipe. The retraction inlet oil pipe is connected to the oil pump inlet manifold. One end of the forward extension oil pipe is located in the hydraulic oil tank, and the other end is connected to the oil pump inlet manifold. A forward extension oil valve is installed on the forward extension oil pipe.

Images