Washing type cleaning mechanism of cooling water heat exchanger

Abstract

The flushing type cleaning mechanism comprises a shell-and-tube heat exchanger, an upper connecting plate, a lower sealing plate, a metal corrugated pipe, a first connector and a telescopic air cylinder, the upper connecting plate and the lower sealing plate are fixedly installed on the upper portion and the lower portion of the metal corrugated pipe respectively in a sealed mode, the first connector is installed on the upper connecting plate in a communicated mode, and the telescopic air cylinder is installed on the lower portion of the metal corrugated pipe in a communicated mode. A first flange is arranged on the first connector, and a cleaning connector of a second flange structure is arranged on the lower portion of the shell-and-tube heat exchanger. The flushing type cleaning mechanism does not need to be installed when the shell-and-tube heat exchanger works normally, the normal working state of the shell-and-tube heat exchanger is not affected, when the shell-and-tube heat exchanger needs to be cleaned, the first connector communicates with the cleaning connector in a sealed mode, and when the telescopic air cylinder drives the metal corrugated pipe to conduct contraction and relaxation alternate conversion, the flushing type cleaning mechanism does not need to be installed and does not affect the normal working state of the shell-and-tube heat exchanger. And the cleaning liquid flows and cleans the interior of the shell-and-tube heat exchanger, so that the cleaning efficiency and the cleaning effect are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange, and particularly relates to a flushing cleaning mechanism for a cooling water heat exchanger. Background Art

[0002] The shell-and-tube heat exchanger is also called a tube-and-shell heat exchanger. It is a shell-and-tube type heat exchanger with the wall surface of the tube bundle enclosed in the shell as the heat transfer surface. This kind of heat exchanger has simple structure, low cost, relatively wide flow cross-section, and is easy to clean scale. The existing method for cleaning the scale inside the shell-and-tube heat exchanger is to soak it by introducing a cleaning liquid, which cannot make the cleaning liquid in a flowing state to improve the cleaning efficiency and tilting effect. When using the circulating cleaning method, a circulating pump needs to be added, and the volume of the cleaning liquid required is relatively large. Since there is a lot of scale inside the shell-and-tube heat exchanger, the circulating pump is prone to blockage during cleaning. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a flushing cleaning mechanism for a cooling water heat exchanger that uses a small volume of cleaning liquid and can make the cleaning liquid flow to improve the cleaning efficiency and cleaning effect.

[0004] To solve the above technical problem, the present invention is realized through the following technical solutions: A flushing cleaning mechanism for a cooling water heat exchanger, including a shell-and-tube heat exchanger, an upper connecting plate, a lower sealing plate, a metal bellows, a first joint and a telescopic cylinder. The upper connecting plate and the lower sealing plate are respectively sealed and fixedly installed on the upper and lower parts of the metal bellows. The first joint is connected and installed on the upper connecting plate. A first flange is provided on the first joint. The lower part of the shell-and-tube heat exchanger has a cleaning interface with a second flange structure. Two telescopic cylinder bodies are symmetrically and fixedly installed on the left and right sides of the upper connecting plate. The piston rods of the two telescopic cylinders are fixedly connected to the lower sealing plate. The first flange and the second flange are screwed and sealed and fixedly connected. The first joint has a liquid injection interface.

[0005] Preferably, it further includes telescopic guide rods. The telescopic guide rods are arranged on the front and rear sides of the upper connecting plate and the lower sealing plate. The upper and lower ends of the telescopic guide rods are respectively fixedly connected to the upper connecting plate and the lower sealing plate.

[0006] Preferably, it further includes an angular support. A longitudinal circular hole is provided on the bracket of the shell-and-tube heat exchanger. The angular support is fixedly installed in the longitudinal oblong hole of the bracket through bolts and lock nuts. The upper connecting plate can be placed on the top surface of the angular support.

[0007] Preferably, a buffer rubber pad is fixedly attached to the top surface of the angular support.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: This flushing cleaning mechanism does not need to be installed during the normal operation of the shell-and-tube heat exchanger, and does not affect the normal working state of the shell-and-tube heat exchanger. When the shell-and-tube heat exchanger needs to be cleaned, the first joint is hermetically connected to the cleaning interface. When the telescopic cylinder drives the metal bellows to alternately contract and expand, the cleaning liquid flows through the shell-and-tube heat exchanger for cleaning, thereby improving the cleaning efficiency and cleaning effect. Brief Description of the Drawings

[0009] The present utility model will be further described below with reference to the drawings.

[0010] Figure 1 It is a schematic structural diagram of the present utility model. Detailed Embodiments

[0011] The present utility model will be described in detail below in conjunction with the specific embodiments:

[0012] As Figure 1 shown, a flushing cleaning mechanism for a cooling water heat exchanger includes a shell-and-tube heat exchanger 1, an upper connecting plate 2, a lower sealing plate 3, a metal bellows 4, a first joint 5, and a telescopic cylinder 6. The upper connecting plate 2 and the lower sealing plate 3 are respectively hermetically and fixedly installed on the upper and lower parts of the metal bellows 4. The first joint 5 is connected and installed on the upper connecting plate 2. A first flange is provided on the first joint 5. The lower part of the shell-and-tube heat exchanger 1 has a cleaning interface 15 with a second flange structure. The cylinders of two telescopic cylinders 6 are symmetrically and fixedly installed on the left and right sides of the upper connecting plate 2. The piston rods of the two telescopic cylinders 6 are fixedly connected to the lower sealing plate 3. The first flange and the second flange are screwed and hermetically fixedly connected. The first joint 5 has a liquid injection interface 51.

[0013] It further includes telescopic guide rods 7. The telescopic guide rods 7 are arranged on the front and rear sides of the upper connecting plate 2 and the lower sealing plate 3. The upper and lower ends of the telescopic guide rods 7 are respectively fixedly connected to the upper connecting plate 2 and the lower sealing plate 3. The telescopic guide rods 7 can improve the straightness of the lower sealing plate 3 during the up and down movement, avoid uneven stress on the metal bellows 4 during the telescopic and expansion of the metal bellows 4 due to the inclination of the lower sealing plate 3, and can extend the service life of the metal bellows 4.

[0014] It further includes angular support members 8. Longitudinal round holes are provided on the bracket 10 of the shell-and-tube heat exchanger 1. The angular support members 8 are fixedly installed in the longitudinal oblong holes of the bracket 10 through bolts and lock nuts. The upper connecting plate 2 can be placed on the top surface of the angular support members 8. The angular support members 8 support the combination of the upper connecting plate 2, the lower sealing plate 3, the metal bellows 4, the first joint 5, and the telescopic cylinder 6 and the internal cleaning liquid, reduce the load on the cleaning interface 15 of the shell-and-tube heat exchanger 1, and can extend the service life of the cleaning interface 15.

[0015] A buffer rubber pad is fixedly attached to the top surface of the angular support member 8 to avoid the noise generated by rigid impact due to a slight gap between the two.

[0016] When the shell-and-tube heat exchanger 1 is operating normally, the first flange and the second flange are disassembled and separated, and a plugging end cover is used to seal and fixedly install on the second flange to plug the cleaning interface 15. When cleaning the internal cooling water heat exchange area of the shell-and-tube heat exchanger 1, the valves at the cooling water inlet 13 and the cooling water outlet 14 of the shell-and-tube heat exchanger 1 are in the closed state, the plugging end cover is opened to drain the water and scale inside the shell-and-tube heat exchanger 1, and the first flange on the first joint 5 is hermetically and fixedly connected to the second flange of the cleaning interface 15. 80%-90% of the cleaning liquid is injected into the cooling water area of the shell-and-tube heat exchanger 1 through the liquid injection interface 51, and the cleaning liquid is also stored in the metal bellows 4. The telescopic cylinder 6 is started to drive the metal bellows 4 to reciprocate and contract and expand, which can drive the cleaning liquid inside the shell-and-tube heat exchanger 1 to flow, thereby improving the cleaning efficiency and cleaning effect. In order to further improve the cleaning efficiency and cleaning effect, warm water at 40°-50° can be injected through the cold water inlet 11 and the cold water outlet 12 of the shell-and-tube heat exchanger 1 to improve the cleaning activity effect of the cleaning liquid.

Claims

1. A flushing cleaning mechanism for a cooling water heat exchanger, characterized in that: The invention comprises a shell and tube heat exchanger (1), an upper connecting plate (2), a lower sealing plate (3), a metal bellows (4), a first joint (5) and a telescopic cylinder (6); the upper connecting plate (2) and the lower sealing plate (3) are respectively sealed and fixedly mounted on the upper and lower parts of the metal bellows (4); the first joint (5) is connected and mounted on the upper connecting plate (2); a first flange is provided on the first joint (5); a cleaning interface (15) of a second flange structure is provided at the lower part of the shell and tube heat exchanger (1); two telescopic cylinders (6) are symmetrically and fixedly mounted on the left and right sides of the upper connecting plate (2); piston rods of the two telescopic cylinders (6) are fixedly connected to the lower sealing plate (3); the first flange is screwed and sealed and fixedly connected to the second flange; and the first joint (5) has a liquid injection interface (51).

2. The flushing cleaning mechanism for the cooling water heat exchanger according to claim 1, characterized in that: It also comprises a telescopic guide rod (7), which is arranged on the front and rear sides of the upper connecting plate (2) and the lower sealing plate (3), and the upper and lower ends of the telescopic guide rod (7) are respectively fixedly connected to the upper connecting plate (2) and the lower sealing plate (3).

3. The flushing cleaning mechanism for a cooling water heat exchanger according to claim 1, characterized in that: It also includes an angle support (8), a bracket (10) of the shell and tube heat exchanger (1) is provided with a longitudinal round hole, the angle support (8) is fixedly installed in the longitudinal long round hole of the bracket (10) by means of bolts and lock nuts, and the upper connecting plate (2) can be placed on the top surface of the angle support (8).

4. The flushing cleaning mechanism for the cooling water heat exchanger according to claim 3, characterized in that: A buffer rubber pad is fixedly provided on the top surface of the angled support member (8).

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