Novel plate heat exchanger backwashing structure
By designing a cleaning liquid mixing mechanism and a control valve system in a plate heat exchanger, the problem of insufficient mixing of cleaning liquid and water flow in the prior art is solved, which improves the backwashing effect and extends the equipment life.
Patent Information
- Application Number
- CN202420255318.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-02
AI Technical Summary
In the existing plate heat exchanger backwash structure, the cleaning liquid and the water flow cannot be fully mixed, resulting in poor backwashing effect and high concentration cleaning liquid may damage the service life of the equipment.
A new backwash structure including a cleaning liquid mixing mechanism is designed. By driving the motor to drive the gears and mixing rods to rotate, combined with the design of the mixing blades, ensuring full mixing of the cleaning liquid and water, and control of the switching valve and the electrically controlled valve. , prevent impurities from affecting the feed pipeline.
It improves the backwashing effect of the plate heat exchanger, prevents excessive concentration of cleaning liquid from causing damage to the equipment, and extends the service life of the equipment.
Smart Images
Figure CN222188012U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plate heat exchangers, in particular to a novel backwashing structure of a plate heat exchanger. Background Art
[0002] A plate heat exchanger is a heat exchange device that consists of multiple metal plates. Each plate has a corrugated shape, forming many narrow channels. These channels can be divided into two fluid flow channels, one for the heat source fluid and the other for the cooling medium. Due to the small gap between the plates, the fluid will generate turbulence when passing between the plates, thereby increasing the heat transfer coefficient. Compared with other heat exchangers, plate heat exchangers have higher heat transfer efficiency. At the same time, plate heat exchangers are composed of parallel stacked plates. Compared with traditional shell and tube heat exchangers, they are smaller in size and occupy less area, which makes plate heat exchangers suitable for occasions with limited space. It is more applicable, but during the heat exchange process of the medium in the plate heat exchanger, the impurities inside the medium will be retained inside the plate heat exchanger, which may cause obstruction in the plate heat exchanger and reduce the heat exchange efficiency. The impurities in the plate heat exchanger are usually cleaned by backwashing. The backwashing structure in the prior art usually directly injects cleaning liquid into the pipeline and uses water flow to flush the heat exchanger, resulting in the cleaning liquid and the water flow cannot be fully mixed, resulting in poor backwashing effect. At the same time, the cleaning liquid with a high concentration may also affect the service life of the plate heat exchanger. Utility Model Content
[0003] The technical problem to be solved by the utility model is that the backwashing structure in the prior art usually directly injects cleaning liquid into the pipeline and uses water flow to push the heat exchanger, which results in that the cleaning liquid and the water flow cannot be fully mixed, resulting in poor backwashing effect. At the same time, the cleaning liquid with a high concentration may also affect the service life of the plate heat exchanger.
[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a new type of plate heat exchanger backwashing structure, including a first plate frame, a second plate frame is arranged on any one side of the first plate frame, a plurality of heat exchange plates are arranged between the first plate frame and the second plate frame, a plurality of clamping bolts are symmetrically arranged on both sides of the heat exchange plates, the first plate frame and the second plate frame are fixedly connected by clamping bolts, a second discharge pipe is arranged at the bottom position of the first plate frame away from the second plate frame, a first electric-controlled valve is installed at one end of the second discharge pipe away from the first plate frame, a short-circuit pipe is installed at one end of the first electric-controlled valve away from the first plate frame, a first switching valve is installed at one end of the short-circuit pipe away from the first electric-controlled valve, and a cleaning liquid mixing mechanism is arranged on any one side of the first switching valve.
[0005] The utility model is further configured such that a first discharge pipe is arranged at a position of the first plate frame near the second discharge pipe, a second electrically-controlled valve is installed at one end of the first discharge pipe away from the first plate frame, a connecting pipe is arranged at a position of the first discharge pipe near the short-circuit pipe, a third electrically-controlled valve is installed on the connecting pipe, and one end of the connecting pipe away from the first discharge pipe is fixedly connected to the short-circuit pipe.
[0006] The utility model is further configured such that a second feed pipe is provided at a position where the first plate frame is located at the top end of the second discharge pipe, a first feed pipe is provided at a position where the first plate frame is located at the top end of the first discharge pipe, a second switching valve is installed at one end of the first feed pipe away from the first plate frame, a third discharge pipe is installed at one end of the second switching valve away from the first feed pipe, and a cleaning discharge pipe is installed at the middle interface of the second switching valve.
[0007] Through the above technical solution, the second switching valve is provided to discharge impurities and sewage to different pipes when backwashing the plate heat exchanger, thereby preventing impurities from affecting the feed pipe.
[0008] The utility model is further configured such that the cleaning liquid mixing mechanism includes a support frame, a mixing tank is fixedly connected to the top surface of the support frame, a cleaning liquid pipeline is arranged on the bottom surface of the mixing tank, the end of the cleaning liquid pipeline away from the support frame is installed on a first switching valve, a first annular groove is arranged at the bottom position of the inner wall of the mixing tank, and a second annular groove is arranged at the inner wall of the mixing tank at the top position of the first annular groove.
[0009] Through the above technical solution, the cleaning liquid pipeline is installed on the first switching valve, and the state of the first switching valve is adjusted according to the backwashing needs, so that the cleaning liquid pipeline will not affect the normal use of the second discharge pipeline.
[0010] The utility model is further configured as follows: a top cover is fixedly connected to the top surface of the mixing tank, an inner gear ring is rotatably connected to the top surface of the top cover, a motor mounting frame is fixedly connected to the top surface of the top cover near the inner gear ring, a driving motor is installed on the motor mounting frame, a first liquid inlet pipe is arranged on the top surface of the top cover near the inner gear ring, and a second liquid inlet pipe is arranged on the top surface of the top cover away from the first liquid inlet pipe.
[0011] Through the above technical solution, the first liquid inlet pipe and the second liquid inlet pipe can inject the cleaning liquid and the cleaning water into the mixing tank, so that the cleaning liquid and the cleaning water are mixed in the mixing tank.
[0012] The utility model is further configured as follows: a protective cover is rotatably connected to the top surface of the inner gear ring, a mixing rod is rotatably connected to the center position of the top cover, a sleeve is rotatably connected to the mixing rod near the top cover, a first gear is fixedly connected to the top of the mixing rod, an output shaft of the drive motor passes through the protective cover and is fixedly connected to the first gear, the first gear is meshingly connected to the inner gear ring, a second gear is fixedly connected to the top of the sleeve, a third gear is rotatably connected to the top surface of the top cover near the second gear, the third gear is meshingly connected to the inner gear ring, and the second gear is meshingly connected to the third gear.
[0013] Through the above technical solution, starting the driving motor will drive the first gear to rotate, so that the first gear drives the mixing rod to rotate. At the same time, the first gear will also drive the inner gear ring on the top cover to rotate when it rotates. The inner gear ring will drive the third gear to rotate when it rotates, so that the third gear drives the second gear to rotate together, and the second gear will drive the sleeve to rotate together, so that the mixing rod and the sleeve rotate in opposite directions in the mixing tank.
[0014] The utility model is further configured such that a plurality of first mixing blades are evenly distributed on the circumference of the bottom position of the outer wall of the mixing rod, and ends of the plurality of first mixing blades away from the mixing rod are arranged in the first annular groove; a plurality of second mixing blades are evenly distributed on the circumference of the bottom position of the outer wall of the sleeve, and ends of the plurality of second mixing blades away from the sleeve are arranged in the second annular groove.
[0015] Through the above technical solution, the mixing rod will drive the first mixing blade to rotate when it rotates, and the sleeve will drive the second mixing blade to rotate in the opposite direction of the first mixing blade when it rotates, so that the first mixing blade and the second mixing blade can fully mix the cleaning solution and the cleaning water in the mixing tank, thereby improving the backwashing effect of the plate heat exchanger, and at the same time preventing the plate heat exchanger from being damaged by excessive concentration of the cleaning solution.
[0016] The beneficial effects of the utility model are as follows:
[0017] The utility model provides a cleaning liquid mixing mechanism. Starting a driving motor will drive the first gear to rotate, so that the first gear drives the mixing rod to rotate. At the same time, the first gear will also drive the inner gear ring to rotate on the top cover when rotating. The inner gear ring will drive the third gear to rotate when rotating, so that the third gear drives the second gear to rotate together, and the second gear will drive the sleeve to rotate together, so that the mixing rod and the sleeve rotate in opposite directions in the mixing tank. The mixing rod will drive the first mixing blade to rotate when rotating, and the sleeve will drive the second mixing blade to rotate in the opposite direction to the first mixing blade when rotating, so that the first mixing blade and the second mixing blade can fully mix the cleaning stock liquid and the cleaning water in the mixing tank, thereby improving the backwashing effect of the plate heat exchanger and preventing the plate heat exchanger from being damaged by excessive concentration of the cleaning stock liquid. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the first perspective of the present utility model;
[0019] Figure 2 It is a schematic diagram of the second viewing angle of the present utility model;
[0020] Figure 3 It is a schematic diagram of the cleaning liquid mixing mechanism in the utility model;
[0021] Figure 4 It is a partial structural schematic diagram of the cleaning liquid mixing mechanism in the utility model.
[0022] In the figure: 1, first plate frame; 2, second plate frame; 3, heat exchange plate; 4, clamping bolt; 5, cleaning liquid mixing mechanism; 501, support frame; 502, mixing tank; 503, cleaning liquid pipeline; 504, top cover; 505, first liquid inlet pipe; 506, second liquid inlet pipe; 507, motor mounting frame; 508, driving motor; 509, inner gear ring; 510, protective cover; 511, first gear; 512, mixing rod; 513, sleeve; 514, second gear ; 515, the third gear; 516, the first annular groove; 517, the first mixing blade; 518, the second mixing blade; 519, the second annular groove; 6, the first discharge pipe; 7, the second discharge pipe; 8, the first feed pipe; 9, the second feed pipe; 10, the first electric-controlled valve; 11, the first switching valve; 12, the second electric-controlled valve; 13, the connecting pipeline; 14, the second switching valve; 15, the third discharge pipe; 16, the cleaning discharge pipe; 17, the third electric-controlled valve; 18, the short-circuit pipeline. DETAILED DESCRIPTION
[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0024] See also Figures 1 to 4 A novel plate heat exchanger backwashing structure comprises a first plate frame 1, a second plate frame 2 is arranged on any side of the first plate frame 1, a plurality of heat exchange plates 3 are arranged between the first plate frame 1 and the second plate frame 2, a plurality of clamping bolts 4 are symmetrically arranged on both sides of the heat exchange plates 3, the first plate frame 1 and the second plate frame 2 are fixedly connected by the clamping bolts 4, a second discharge pipe 7 is arranged at the bottom position of the first plate frame 1 away from the second plate frame 2, a first electric-controlled valve 10 is installed at one end of the second discharge pipe 7 away from the first plate frame 1, a short-circuit pipe 18 is installed at one end of the first electric-controlled valve 10 away from the first plate frame 1, a first switching valve 11 is installed at one end of the short-circuit pipe 18 away from the first electric-controlled valve 10, and a cleaning liquid mixing mechanism 5 is arranged on any side of the first switching valve 11;
[0025] A second feed pipe 9 is provided at a position of the first plate frame 1 located at the top end of the second discharge pipe 7, a first feed pipe 8 is provided at a position of the first plate frame 1 located at the top end of the first discharge pipe 6, a second switching valve 14 is installed at one end of the first feed pipe 8 away from the first plate frame 1, a third discharge pipe 15 is installed at one end of the second switching valve 14 away from the first feed pipe 8, a cleaning discharge pipe 16 is installed at the middle interface of the second switching valve 14, a first discharge pipe 6 is provided at a position of the first plate frame 1 close to the second discharge pipe 7, a second electrically-controlled valve 12 is installed at one end of the first discharge pipe 6 away from the first plate frame 1, a connecting pipe 13 is provided at a position of the first discharge pipe 6 close to the short-circuit pipe 18, a third electrically-controlled valve 17 is installed on the connecting pipe 13, and one end of the connecting pipe 13 away from the first discharge pipe 6 is fixedly connected to the short-circuit pipe 18;
[0026] The cleaning liquid mixing mechanism 5 includes a support frame 501, a mixing tank 502 is fixedly connected to the top surface of the support frame 501, a cleaning liquid pipeline 503 is arranged on the bottom surface of the mixing tank 502, and the end of the cleaning liquid pipeline 503 away from the support frame 501 is installed on the first switching valve 11, a first annular groove 516 is arranged at the bottom position of the inner wall of the mixing tank 502, and a second annular groove 519 is arranged at the position of the inner wall of the mixing tank 502 located at the top of the first annular groove 516, a plurality of first mixing blades 517 are evenly distributed on the circumference of the bottom position of the outer wall of the mixing rod 512, and the ends of the plurality of first mixing blades 517 away from the mixing rod 512 are all arranged in the first annular groove 516, and a plurality of second mixing blades 518 are evenly distributed on the circumference of the bottom position of the outer wall of the sleeve 513, and the ends of the plurality of second mixing blades 518 away from the sleeve 513 are all arranged in the second annular groove 519;
[0027] A top cover 504 is fixedly connected to the top surface of the mixing tank 502, an inner gear ring 509 is rotatably connected to the top surface of the top cover 504, a motor mounting frame 507 is fixedly connected to the top surface of the top cover 504 near the inner gear ring 509, a driving motor 508 is installed on the motor mounting frame 507, a first liquid inlet pipe 505 is arranged at the top surface of the top cover 504 near the inner gear ring 509, a second liquid inlet pipe 506 is arranged at the top surface of the top cover 504 away from the first liquid inlet pipe 505, a protective cover 510 is rotatably connected to the top surface of the inner gear ring 509, and a mixing rod is rotatably connected to the center of the top cover 504 512, the mixing rod 512 is rotatably connected to a sleeve 513 near the top cover 504, the top of the mixing rod 512 is fixedly connected to a first gear 511, the output shaft of the drive motor 508 passes through the protective cover 510 and is fixedly connected to the first gear 511, the first gear 511 is meshingly connected to the inner gear ring 509, the top of the sleeve 513 is fixedly connected to a second gear 514, the top surface of the top cover 504 is rotatably connected to the second gear 514, the third gear 515 is meshingly connected to the inner gear ring 509, and the second gear 514 is meshingly connected to the third gear 515.
[0028] When the utility model is in use, the first electric control valve 10 and the second electric control valve 12 are first closed, and then the third electric control valve 17 is opened to form a passage between the short-circuit pipe 18 and the first discharge pipe 6, and then the second switching valve 14 is used to form a passage between the first feed pipe 8 and the cleaning discharge pipe 16, and the first feed pipe 8 and the third discharge pipe 15 are disconnected, and then the cleaning stock solution and the cleaning water are injected into the mixing tank 502 through the first liquid inlet pipe 505 and the second liquid inlet pipe 506, and then the driving motor 508 is started to drive the first gear 511 to rotate, so that the first gear 511 drives the mixing rod 512 to rotate, and at the same time, the first gear 511 will also drive the inner gear ring 509 to rotate on the top cover 504 when rotating, and the inner gear ring 509 will drive the third gear 515 to rotate when rotating, so that the third gear 515 drives the second gear 514 to rotate together, and the second gear 514 drives the sleeve 513 to rotate together, so that the mixing rod 512 The mixing rod 512 rotates in the opposite direction to the sleeve 513 in the mixing tank 502. When the mixing rod 512 rotates, it will drive the first mixing blade 517 to rotate. When the sleeve 513 rotates, it will drive the second mixing blade 518 to rotate in the opposite direction to the first mixing blade 517, so that the first mixing blade 517 and the second mixing blade 518 can fully mix the cleaning stock solution and the cleaning water in the mixing tank 502. Finally, the first switching valve 11 is used to form a passage between the cleaning liquid pipeline 503 and the short-circuit pipeline 18. The mixed cleaning liquid will be transmitted to the short-circuit pipeline 18 through the cleaning liquid pipeline 503, and then transmitted to the connecting pipeline 13 through the short-circuit pipeline 18, and then transmitted to the first discharge pipe 6 through the first discharge pipe 6 into the plate heat exchanger to backwash the plate heat exchanger. Finally, the cleaning liquid will be discharged to the cleaning discharge pipe 16 through the first feed pipe 8, thereby completing the backwashing of the plate heat exchanger.
[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A novel plate heat exchanger backwashing structure, comprising a first plate frame (1), characterized in that: A second plate frame (2) is arranged on either side of the first plate frame (1), a plurality of heat exchange plates (3) are arranged between the first plate frame (1) and the second plate frame (2), a plurality of clamping bolts (4) are symmetrically arranged on both sides of the heat exchange plates (3), the first plate frame (1) and the second plate frame (2) are fixedly connected by the clamping bolts (4), a second discharge pipe (7) is arranged at the bottom position of the first plate frame (1) on the side away from the second plate frame (2), a first electric-controlled valve (10) is installed at one end of the second discharge pipe (7) away from the first plate frame (1), a short-circuit pipe (18) is installed at one end of the first electric-controlled valve (10) away from the first plate frame (1), a first switching valve (11) is installed at one end of the short-circuit pipe (18) away from the first electric-controlled valve (10), and a cleaning liquid mixing mechanism (5) is arranged on either side of the first switching valve (11).
2. According to claim 1, a novel plate heat exchanger backwashing structure is characterized in that: A first discharge pipe (6) is arranged at a position of the first plate frame (1) close to the second discharge pipe (7); a second electrically controlled valve (12) is installed at one end of the first discharge pipe (6) away from the first plate frame (1); a connecting pipe (13) is arranged at a position of the first discharge pipe (6) close to the short-circuit pipe (18); a third electrically controlled valve (17) is installed on the connecting pipe (13); and one end of the connecting pipe (13) away from the first discharge pipe (6) is fixedly connected to the short-circuit pipe (18).
3. According to claim 1, a novel plate heat exchanger backwashing structure is characterized in that: A second feed pipe (9) is provided at a position of the first plate frame (1) at the top end of the second discharge pipe (7); a first feed pipe (8) is provided at a position of the first plate frame (1) at the top end of the first discharge pipe (6); a second switching valve (14) is installed at one end of the first feed pipe (8) away from the first plate frame (1); a third discharge pipe (15) is installed at one end of the second switching valve (14) away from the first feed pipe (8); and a cleaning discharge pipe (16) is installed at the middle interface of the second switching valve (14).
4. The novel plate heat exchanger backwashing structure according to claim 1 is characterized in that: The cleaning liquid mixing mechanism (5) comprises a support frame (501), a mixing tank (502) being fixedly connected to the top surface of the support frame (501), a cleaning liquid pipeline (503) being arranged on the bottom surface of the mixing tank (502), an end of the cleaning liquid pipeline (503) away from the support frame (501) being mounted on a first switching valve (11), a first annular groove (516) being arranged at the bottom position of the inner wall of the mixing tank (502), and a second annular groove (519) being arranged at a position on the inner wall of the mixing tank (502) located at the top of the first annular groove (516).
5. A novel plate heat exchanger backwashing structure according to claim 4, characterized in that: A top cover (504) is fixedly connected to the top surface of the mixing tank (502), an inner gear ring (509) is rotatably connected to the top surface of the top cover (504), a motor mounting frame (507) is fixedly connected to a position of the top surface of the top cover (504) close to the inner gear ring (509), a driving motor (508) is mounted on the motor mounting frame (507), a first liquid inlet pipe (505) is arranged at a position of the top surface of the top cover (504) close to the inner gear ring (509), and a second liquid inlet pipe (506) is arranged at a position of the top surface of the top cover (504) away from the first liquid inlet pipe (505).
6. A novel plate heat exchanger backwashing structure according to claim 5, characterized in that: A protective cover (510) is rotatably connected to the top surface of the inner gear ring (509); a mixing rod (512) is rotatably connected to the center of the top cover (504); a sleeve (513) is rotatably connected to the mixing rod (512) at a position close to the top cover (504); a first gear (511) is fixedly connected to the top of the mixing rod (512); an output shaft of the drive motor (508) passes through the protective cover (510) and is fixedly connected to the first gear (511); the first gear (511) is meshingly connected to the inner gear ring (509); a second gear (514) is fixedly connected to the top of the sleeve (513); a third gear (515) is rotatably connected to the top surface of the top cover (504) at a position close to the second gear (514); the third gear (515) is meshingly connected to the inner gear ring (509); and the second gear (514) is meshingly connected to the third gear (515).
7. A novel plate heat exchanger backwashing structure according to claim 6, characterized in that: A plurality of first mixing blades (517) are evenly distributed around the circumference of the bottom position of the outer wall of the mixing rod (512); ends of the plurality of first mixing blades (517) away from the mixing rod (512) are all arranged in the first annular groove (516); a plurality of second mixing blades (518) are evenly distributed around the circumference of the bottom position of the outer wall of the sleeve (513); ends of the plurality of second mixing blades (518) away from the sleeve (513) are all arranged in the second annular groove (519).