A heat exchanger with filtration function

Abstract

This utility model relates to the field of heat exchanger technology, specifically disclosing a heat exchanger with a filtration function, including a heat exchanger body and a water inlet. The water inlet is detachably connected to an external filtration mechanism via a flange. The filtration mechanism includes an outer cylinder with open ends, a sealing cover, and a filter cartridge with one open end. One end of the outer cylinder is connected to the water inlet flange, and the sealing cover is located at the other end of the outer cylinder. The filter cartridge is located inside the outer cylinder and is coaxially arranged, with the open end of the filter cartridge located on the sealing cover. The sealing cover has a water inlet pipe communicating with the filter cartridge. The filter cartridge has an axially movable scraper sleeve inside, and the outer edge of the scraper sleeve has an elastic scraper blade that is interference-fitted with the inner wall of the filter cartridge. A linear actuator for driving the scraper sleeve is located outside the sealing cover. The external filtration mechanism effectively filters impurities, and the scraper sleeve automatically cleans the filter cartridge to ensure continuous filtration, reduce manual cleaning, and improve automation and slag discharge efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and specifically discloses a heat exchanger with a filtration function. Background Technology

[0002] A heat exchanger is a device that transfers part of the heat from a hot fluid to a cold fluid. It is also called a heat exchanger and is divided into two types: plate type and shell-and-tube type. Among them, the U-tube heat exchanger is a type of indirect heat exchanger that uses the wall of a U-shaped tube enclosed in a shell as the heat transfer surface.

[0003] A U-tube heat exchanger generally includes a tube box and a shell. The heat exchange tubes are located inside the shell and are connected to the tube box. The tube box has a cold fluid inlet and an outlet on its upper and lower sides, respectively. The cold fluid enters the tube box and then enters the heat exchange tubes, and then flows out of the tube box. The shell has a hot fluid outlet pipe and a hot fluid inlet pipe on its upper and lower sides, respectively. The hot fluid enters the shell through the inlet pipe on the lower side of the shell, exchanges heat with the heat exchange tubes, and then leaves the shell through the outlet pipe on the upper side of the shell.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: solid particles are easily mixed into the heat fluid, and a large number of solid particles directly enter the shell through the feed pipe, causing solid particles to accumulate rapidly on the outer wall of the heat exchange tube, increasing the cleaning frequency of the heat exchange tube. Utility Model Content

[0005] This invention proposes a heat exchanger with filtration function. It effectively filters impurities through an external filtration mechanism, and the automatic cleaning of the filter cartridge by the scraper sleeve ensures continuous filtration. The pressure sensor and controller realize intelligent control, and the conical slag collection chamber and spiral guide ribs optimize the slag discharge structure, thereby preventing the heat exchange from being affected, extending the equipment life, reducing manual cleaning, and improving the degree of automation and slag discharge efficiency.

[0006] This utility model is implemented as follows: a heat exchanger with a filtration function includes a heat exchanger body and a water inlet. The water inlet is detachably connected to an external filtration mechanism via a flange. The filtration mechanism includes an outer cylinder with open ends, a sealing cover, and a filter cylinder with one open end. One end of the outer cylinder is connected to the water inlet flange, and the sealing cover is located at the other end of the outer cylinder. The filter cylinder is located inside the outer cylinder and is coaxially arranged, with the open end of the filter cylinder located on the sealing cover. The outer wall of the filter cylinder has filter holes for intercepting impurities. The sealing cover has a water inlet pipe communicating with the filter cylinder. The filter cylinder has an axially movable scraper sleeve inside, and the outer edge of the scraper sleeve has an elastic scraper blade that is interference-fitted with the inner wall of the filter cylinder. The outer side of the sealing cover has a linear actuator for driving the scraper sleeve. The bottom of the outer cylinder is connected to a slag discharge pipe communicating with the filter cylinder, and the slag discharge pipe has a shut-off valve located below the outer cylinder.

[0007] As a preferred embodiment of the heat exchanger with filtration function according to this utility model, the linear actuator is an electric push rod or a hydraulic cylinder, the output rod of which passes through the sealing cover and is connected to the scraper sleeve.

[0008] As a preferred embodiment of the heat exchanger with filtration function of this utility model, the scraper sleeve is made of polytetrafluoroethylene composite material, and the end of the elastic scraper blade facing the water flow is provided with a wedge-shaped scraping surface.

[0009] As a preferred embodiment of the heat exchanger with filtration function of this utility model, the inner wall of the filter cartridge at the end away from the sealing cover is provided with an annular groove, and the middle of the annular groove is provided with a spherical protrusion, forming a circumferential concave structure.

[0010] As a preferred embodiment of the heat exchanger with filtration function of this utility model, a pressure sensor is provided on the outer wall of the water inlet pipe, and the monitoring probe of the pressure sensor is located inside the water inlet pipe. The linear actuator and the shut-off valve are connected to a controller, and the controller controls the reciprocating frequency of the scraper sleeve according to the pressure sensor signal.

[0011] As a preferred embodiment of the heat exchanger with filtration function of this utility model, a conical slag collection cavity is provided at the connection between the slag discharge pipe and the outer cylinder, the cone angle of the conical slag collection cavity is 45°-60°, and the inner wall of the slag discharge pipe is provided with spiral guide ribs.

[0012] The beneficial effects of this utility model are:

[0013] 1. The external filtration mechanism can effectively filter impurities before water enters the heat exchanger body, preventing impurities from entering the heat exchanger and affecting the heat exchange effect and equipment life.

[0014] 2. The scraper sleeve and elastic scraper blade can automatically clean the impurities attached to the inner wall of the filter cartridge, ensuring the continuity of the filtration effect and reducing the workload and frequency of manual cleaning.

[0015] 3. Through the cooperation of pressure sensors and controllers, the reciprocating frequency of the scraper sleeve can be intelligently controlled according to the pressure inside the outer cylinder, thereby improving the automation level and working efficiency of the filtration system.

[0016] 4. The conical slag collection chamber at the connection between the slag discharge pipe and the outer cylinder is conducive to the collection and discharge of impurities, and the spiral guide ribs help impurities to pass smoothly through the slag discharge pipe and be discharged. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the scraper sleeve and elastic scraper blade of this utility model.

[0020] Figure 3 This is a schematic diagram of the conical slag collection chamber and the spiral guide ribs of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the filter cartridge and filter holes of this utility model.

[0022] The markings in the diagram are: 1. Heat exchanger body; 2. Inlet; 3. Outer cylinder; 4. Sealing cover; 5. Filter cartridge; 6. Filter hole; 7. Inlet pipe; 8. Scraper sleeve; 9. Elastic scraper blade; 10. Linear actuator; 11. Slag discharge pipe; 12. Shut-off valve; 13. Wedge-shaped scraper surface; 14. Annular groove; 15. Protrusion; 16. Pressure sensor; 17. Controller; 18. Conical slag collection chamber; 19. Spiral guide ribs. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-4 A heat exchanger with filtration function includes a heat exchanger body 1 and an inlet 2. The inlet 2 is detachably connected to an external filtration mechanism via a flange. The filtration mechanism includes an outer cylinder 3 with open ends, a sealing cover 4, and a filter cylinder 5 with one open end. One end of the outer cylinder 3 is connected to the flange of the inlet 2, and the sealing cover 4 is located at the other end of the outer cylinder 3. The filter cylinder 5 is located inside the outer cylinder 3 and is coaxially arranged, with the open end of the filter cylinder 5 located on the sealing cover 4. The outer wall of the filter cylinder 5 is provided with filter holes 6 for intercepting impurities. The sealing cover 4 is provided with an inlet pipe 7 communicating with the filter cylinder 5. The filter cylinder 5 is provided with an axially movable scraper sleeve 8. The outer edge of the scraper sleeve 8 is provided with an elastic scraper blade 9 that is interference-fitted with the inner wall of the filter cylinder 5. The outer side of the sealing cover 4 is provided with a linear actuator 10 for driving the scraper sleeve 8. The bottom of the outer cylinder 3 is connected to a slag discharge pipe 11 communicating with the filter cylinder 5. The slag discharge pipe 11 is provided with a shut-off valve 12, which is located below the outer cylinder 3.

[0025] In this embodiment: Water enters from the inlet pipe 7 and first passes through the filter cylinder 5 of the external filtration mechanism. Impurities in the water are intercepted by the filter holes 6 on the outer wall of the filter cylinder 5, and the filtered water enters the heat exchanger body 1. During the filtration process, the linear actuator 10 drives the scraper sleeve 8 to move axially within the filter cylinder 5. The elastic scraper blade 9 is interference-fitted with the inner wall of the filter cylinder 5 to scrape off the impurities attached to the inner wall of the filter cylinder 5. The impurities fall to the bottom of the outer cylinder 3. When slag discharge is required, the shut-off valve 12 is opened, and the impurities are discharged through the slag discharge pipe 11. The pressure sensor 16 monitors the pressure in the inlet pipe 7 in real time, and the controller 17 controls the reciprocating frequency of the linear actuator 10 to drive the scraper sleeve 8 according to the pressure signal to adapt to different filtration conditions.

[0026] As a technical optimization of this utility model, the linear actuator 10 is an electric push rod or a hydraulic cylinder, and its output rod passes through the sealing cover 4 and is connected to the scraper sleeve 8.

[0027] In this embodiment: starting the linear drive 10 makes it easy to drive the scraper sleeve 8 and the elastic scraper blade 9 to move, and makes it easy to automatically clean the filter cartridge 5.

[0028] As a technical optimization of this utility model, the scraper sleeve 8 is made of polytetrafluoroethylene vinyl composite material, and the elastic scraper blade 9 has a wedge-shaped scraping surface 13 at the end facing the water flow.

[0029] In this embodiment, the end of the elastic scraper 9 facing the water flow is provided with a wedge-shaped scraping surface 13, which helps to improve the effect of scraping off impurities and enhances the durability of the elastic scraper 9 and the scraper sleeve 8.

[0030] As a technical optimization of this utility model, the inner wall of the filter cartridge 5 away from the sealing cover 4 is provided with an annular groove 14, and the middle of the annular groove 14 is provided with a spherical protrusion 15, forming a circumferential concave structure.

[0031] In this embodiment, the annular groove 14 structure can reduce the impact of water on the filter cartridge 5, reduce the water hammer effect, and easily protect the filter cartridge 5.

[0032] As a technical optimization of this utility model, a pressure sensor 16 is provided on the outer wall of the water inlet pipe 7, and the monitoring probe of the pressure sensor 16 is located inside the water inlet pipe 7. The linear drive 10 and the shut-off valve 12 are connected to a controller 17, and the controller 17 controls the reciprocating motion frequency of the scraper sleeve 8 according to the signal of the pressure sensor 16.

[0033] In this embodiment: the pressure sensor 16 monitors the pressure value in the water inlet pipe 7 in real time and transmits the signal to the controller 17; the controller 17 has a preset pressure threshold (e.g., 0.3 MPa). When the detected pressure exceeds the threshold, the linear actuator 10 is activated to drive the scraper sleeve 8 to reciprocate, and the frequency increases with the pressure until the pressure drops below the threshold, thereby improving the intelligence and automation level of the entire filtration system (when the pressure value detected by the pressure sensor 16 exceeds the preset threshold, the linear actuator 10 is controlled to drive the scraper sleeve 8 to reciprocate, and the reciprocating frequency is positively correlated with the pressure value).

[0034] As a technical optimization of this utility model, a conical slag collection cavity 18 is provided at the connection between the slag discharge pipe 11 and the outer cylinder 3. The cone angle of the conical slag collection cavity 18 is 45°-60°, and the inner wall of the slag discharge pipe 11 is provided with spiral guide ribs 19.

[0035] In this embodiment, the conical slag collection cavity 18 (with a cone angle of 45°-60°) at the connection between the slag discharge pipe 11 and the outer cylinder 3 and the spiral guide ribs 19 on the inner wall of the slag discharge pipe 11 are defined, which optimizes the slag discharge structure, makes the slag discharge smoother, and improves the slag discharge efficiency.

[0036] Working principle and usage process of this utility model:

[0037] Water enters the filter cartridge 5 of the external filtration mechanism through the inlet pipe 7. Under pressure, the water passes through the outer wall of the filter cartridge 5, and impurities in the water are intercepted by the filter holes 6 on the outer wall of the filter cartridge 5. The filtered water then flows out through the filter holes 6 and enters the heat exchanger body 1 for heat exchange. During the water filtration and flow into the heat exchanger body 1, the pressure sensor 16 monitors the pressure in the inlet pipe 7 in real time. As filtration progresses, the amount of impurities attached to the filter cartridge 5 gradually increases, which may cause the pressure inside the outer cylinder 3 to rise. The pressure sensor 16 transmits the real-time monitored pressure signal to the controller 17. After receiving the signal from the pressure sensor 16, the controller 17 analyzes and judges the pressure value. When the pressure value reaches or exceeds the preset threshold, the controller 17 issues a command to start the linear actuator 10 (electric push rod or hydraulic cylinder). The output rod of the linear actuator 10 passes through the sealing cover 4 and drives the scraper sleeve 8 to move axially inside the filter cartridge 5 through the anti-rotation mechanism. The elastic scraper blade 9 on the outer edge of the scraper sleeve 8 is press-fitted with the inner wall of the filter cartridge 5. During the movement, it removes the impurities attached to the filter cartridge 5. Impurities on the wall are scraped off and fall to the bottom of the outer cylinder 3 under gravity. After the scraper sleeve 8 completes one axial movement, the linear actuator 10 drives the scraper sleeve 8 to move in the opposite direction and return to the initial position, completing one cleaning cycle. According to the pressure, the controller 17 can adjust the reciprocating frequency of the scraper sleeve 8 to ensure the filtration effect of the filter cartridge 5. When a certain amount of impurities accumulates at the bottom of the outer cylinder 3 and slag discharge is required, the controller 17 issues a command to open the shut-off valve 12. Because a conical slag collection chamber 1 is provided at the connection between the slag discharge pipe 11 and the outer cylinder 3. 8. Under the influence of gravity and water flow, impurities flow along the conical slag collection chamber 18 to the slag discharge pipe 11. The spiral guide ribs 19 on the inner wall of the slag discharge pipe 11 guide the impurities to pass smoothly through the slag discharge pipe 11 and be discharged. After the slag discharge is completed, the controller 17 issues a command to close the shut-off valve 12 and waits for the next slag discharge operation. The above process is repeated to continuously filter the water entering the heat exchanger, ensuring that the heat exchanger body 1 can use clean water for heat exchange. At the same time, the filter cartridge 5 is cleaned in time and impurities are discharged to maintain the normal operation of the filtration mechanism.

[0038] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A heat exchanger with filtering function, comprising a heat exchanger body (1) and a water inlet (2), characterized in that: The inlet (2) is detachably connected to an external filter mechanism via a flange; the filter mechanism includes an outer cylinder (3) with open ends, a sealing cover (4), and a filter cylinder (5) with one open end; one end of the outer cylinder (3) is connected to the flange of the inlet (2), the sealing cover (4) is located at the other end of the outer cylinder (3), the filter cylinder (5) is located inside the outer cylinder (3) and is coaxially arranged, and the open end of the filter cylinder (5) is located on the sealing cover (4), and the outer wall of the filter cylinder (5) is provided with filter holes (6), the filter holes (6) are used for To intercept impurities, the sealing cover (4) is provided with an inlet pipe (7) that communicates with the filter cylinder (5); the filter cylinder (5) is provided with an axially movable scraper sleeve (8), the outer edge of the scraper sleeve (8) is provided with an elastic scraper blade (9) that is interference-fitted with the inner wall of the filter cylinder (5), and the outer side of the sealing cover (4) is provided with a linear driver (10) that drives the scraper sleeve (8); the bottom of the outer cylinder (3) is connected to a slag discharge pipe (11) that communicates with the filter cylinder (5), the slag discharge pipe (11) is provided with a shut-off valve (12), and the shut-off valve (12) is located below the outer cylinder (3).

2. The heat exchanger with filtering function according to claim 1, characterized in that: The linear actuator (10) is an electric push rod or a hydraulic cylinder, whose output rod passes through the sealing cover (4) and is connected to the scraper sleeve (8).

3. A heat exchanger with a filtration function according to claim 1, characterized in that: The scraper sleeve (8) is made of polytetrafluoroethylene vinyl composite material, and the elastic scraper blade (9) has a wedge-shaped scraping surface (13) at the end facing the water flow.

4. A heat exchanger with a filtration function according to claim 1, characterized in that: The filter cartridge (5) has an annular groove (14) on the inner wall of the end away from the sealing cover (4), and a spherical protrusion (15) is provided in the middle of the annular groove (14) to form a circumferential concave structure.

5. A heat exchanger with a filtration function according to claim 1, characterized in that: The outer wall of the water inlet pipe (7) is provided with a pressure sensor (16), and the monitoring probe of the pressure sensor (16) is located inside the water inlet pipe (7). The linear actuator (10) and the shut-off valve (12) are connected to a controller (17), and the controller (17) controls the reciprocating motion frequency of the scraper sleeve (8) according to the signal of the pressure sensor (16).

6. A heat exchanger with a filtration function according to claim 1, characterized in that: The slag discharge pipe (11) is provided with a conical slag collection chamber (18) at the connection between the outer cylinder (3). The cone angle of the conical slag collection chamber (18) is 45°-60°, and the inner wall of the slag discharge pipe (11) is provided with spiral guide ribs (19).

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