A cleaning device for falling film evaporation vertical pipe

Abstract

The present invention relates to the field of pipeline cleaning equipment, and in particular to a cleaning device for a falling film evaporation vertical pipe, comprising an evaporation pipe, and also comprising a shell one arranged in the evaporation pipe, wherein the bottom end of the shell one is closed, and the bottom end of the shell one is threadedly connected to a gas joint, a partition is arranged in the shell one, the outer wall of the shell one is sealed with a rubber sleeve, and the inside of the rubber sleeve is connected to the space located below the partition in the shell one, and the top of the shell one is slidably sealed with a shell two, and the top of the shell two is closed. The device uses compressed gas as the power source for the vertical pipe to climb, and the vertical pipe of the device can be driven to climb by repeated connection and pressure relief of the compressed gas, and the climbing of the device can be suspended at any time by simply blocking the compressed gas, and the electric brush can be effectively and stably transported to any height in the evaporation pipe for cleaning operations, and the device has the characteristics of simple and compact structure, and is suitable for evaporation pipes with smaller diameters.

Description

Technical Field

[0001] The invention relates to the field of pipeline cleaning equipment, in particular to a cleaning device for a falling film evaporation vertical pipe. Background Art

[0002] Vertical tube falling film evaporation generally refers to spraying high-salt wastewater on the inner wall of a vertical pipe, and flowing high-temperature steam on the outer wall of the pipe, so that the high-salt wastewater in the pipe evaporates and concentrates. After such equipment has been used for a period of time, attachments will form on the inner wall of the pipe, and the attachments have a heat-blocking effect between the high-temperature steam and the high-salt wastewater, affecting the heat exchange efficiency. Therefore, periodic cleaning and maintenance are required. Commonly used pipeline cleaning methods in factories include acid cleaning, alkali cleaning and hot water flushing. In order to ensure sufficient cleaning in the pipeline, a large amount of acid cleaning liquid and alkali cleaning liquid are often required, and the material cost needs to be reduced. In addition, a large amount of hot water flushing is required after acid cleaning and alkali cleaning to avoid residue, and the water consumption also needs to be further controlled. Therefore, a cleaning device for falling film evaporation vertical pipes that can perform brushing operations on the evaporation pipe is proposed to solve the above problems. Summary of the invention

[0003] In view of the problem that conventional acid washing, alkali washing and hot water washing of the vertical pipe of the falling film evaporation equipment mentioned above or in the prior art are relatively costly, the present invention is proposed.

[0004] Therefore, an object of the present invention is to provide a cleaning device for a falling film evaporation standpipe.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a cleaning device for a falling film evaporation vertical pipe, comprising an evaporation pipe, and also comprising a shell one arranged in the evaporation pipe, and the bottom end of the shell one is closed, and the bottom end of the shell one is threadedly connected to a gas joint, a partition is arranged in the shell one, the outer wall of the shell one is sealed with a rubber sleeve, and the interior of the rubber sleeve is connected to the space located below the partition in the shell one, the top end of the shell one is slidingly and sealingly sleeved with a shell two, and the top end of the shell two is closed, the top end of the shell two is connected to an electric brush, a short column one is arranged on the top end of the shell two downward along its axis, the short column one is slidably sleeved with a sliding sleeve, the peripheral wall of the sliding sleeve is parallelogram-shaped and hinged with an anti-sliding block, and the anti-sliding block is about The short columns are distributed in a circular array, and the anti-sliding block contacts the inner wall of the evaporator tube; the partition is provided with a valve group, which includes spring sheets respectively arranged on the top and bottom of the partition, and also includes a valve core located between the spring sheets, the valve core is cylindrical, and the interior of the valve core is hollow, the inner cavity of the valve core is provided with a partition along its radial direction, and rubber pads are sleeved on both sides of the partition in the valve core, and the outer wall of the rubber pad fits the inner wall of the valve core and the side wall of the partition, the two ends of the rubber pad are located on the side away from the partition, respectively, and the installation directions of the two rubber pads are opposite, the peripheral wall of the valve core is provided with an air inlet at the rubber pad guide groove, and the peripheral wall of the valve core is provided with an exhaust port at the rubber pad opening, and the valve core is coaxially plugged with the partition.

[0006] As a preferred solution of the cleaning device for the falling film evaporation vertical tube of the present invention, the shell one and the shell two are both cylindrical, and the lower half of the shell two is sleeved in the shell one, a pair of sealing rings are arranged between the bottom end peripheral wall of the shell two and the inner wall of the shell one, and the outer diameter of the upper half of the shell two is equal to the outer diameter of the shell one.

[0007] As a preferred solution of the cleaning device for the falling film evaporation vertical tube of the present invention, the top edge of the shell one is contracted inward with a side strip, and the peripheral wall of the shell two is provided with a retaining spring located on the upper part of the sealing ring, and the shell two is sleeved with a spring one located between the retaining spring and the side strip.

[0008] As a preferred solution of the cleaning device for the falling film evaporation vertical tube of the present invention, the top and bottom ends of the rubber sleeve are both provided with sealing rings, and the outer edge and inner edge of the sealing ring are both bent away from the rubber sleeve, and the sealing ring is coaxially fixedly connected to the shell.

[0009] As a preferred solution of the cleaning device for the falling film evaporation vertical tube of the present invention, the top end surface and the bottom end surface of the rubber sleeve are both sealed with the sealing ring, and the opening edge of the rubber sleeve is matched and hung in the groove between the inner edge of the sealing ring and an outer wall of the shell.

[0010] As a preferred solution of the cleaning device for the falling film evaporation vertical tube of the present invention, the parallelogram structure hinge axis between the sliding sleeve and the anti-sliding block is horizontally arranged, the short column 1 is located at the top end of the sliding sleeve and is sleeved with a spring 2, and the two side walls of the shell are provided with grooves corresponding to the positions of the anti-sliding blocks.

[0011] As a preferred solution of the cleaning device for the falling film evaporation vertical pipe of the present invention, a guide ring is arranged in the middle of the partition, and the guide ring seals the sliding sleeve valve core, and short columns are arranged between the two ends of the spring sheet and the partition.

[0012] As a preferred solution of the cleaning device for the falling film evaporation vertical pipe of the present invention, after the two ends of the spring sheet are fixedly connected to the short column, the spring sheet generates a pre-compression bend, and the arcs of the pre-compression bends of the two spring sheets are the same.

[0013] As a preferred solution of the cleaning device for the falling film evaporation vertical pipe of the present invention, the top and bottom ends of the valve core are both arranged in an arc shape, and the middle parts of the two ends of the valve core are spot-welded to the middle parts of the corresponding spring pieces.

[0014] As a preferred solution of the cleaning device for the falling film evaporation vertical tube of the present invention, the bristle end of the electric brush contacts the inner wall of the evaporation tube, a wiring gasket is crimped between the gas joint and the shell one, a wire is penetrated, sealed and insulated between the shell one and the shell two, the wiring gasket, the shell one and the shell two are connected to the negative electrode of the electric brush, and the wire is connected to the positive electrode of the electric brush.

[0015] The beneficial effects of the cleaning device for the falling film evaporation vertical pipe of the present invention are as follows: the device uses compressed gas as the power source for the vertical pipe to climb, and the vertical pipe of the device can be driven to climb by repeated connection and pressure relief of the compressed gas. The climbing of the device can also be suspended at any time by simply blocking the compressed gas. The electric brush can be effectively and stably transported to any height in the evaporation pipe for cleaning operations, and the device has the characteristics of simple and compact structure, and is suitable for evaporation pipes with smaller diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the cleaning device for the falling film evaporation vertical tube in the evaporation tube.

[0018] Figure 2A structural cross-sectional view of a cleaning device for a falling film evaporation vertical tube in an evaporation tube.

[0019] Figure 3 A structural cross-sectional view of a cleaning device for a falling film evaporation vertical pipe.

[0020] Figure 4 A cross-sectional view of the assembly structure of shell 1 and shell 2 of a cleaning device for a falling film evaporation vertical pipe.

[0021] Figure 5 A cross-sectional view of the structure of the valve group of the cleaning device for the falling film evaporation vertical pipe.

[0022] Figure 6 Analytical diagram of the valve core and rubber pad structure of the cleaning device for the falling film evaporation standpipe.

[0023] In the figure: 100, evaporator tube; 200, shell one; 201, partition; 202, rubber sleeve; 203, spring; 204, valve core; 205, partition; 206, rubber pad; 207, sealing ring; 200a, side strip; 201a, guide ring; 201b, short column one; 204a, air inlet; 204b, exhaust port; 206a, guide groove; 206b, opening; 300, shell two; 301, short column two; 302, anti-sliding block; 303, sealing ring; 304, retaining spring; 305, spring one; 300a, notch; 301a, sliding sleeve; 301b, spring two; 400, gas joint; 500, electric brush; 501, wiring gasket; 502, wire. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] Example 1, reference Figure 1 to Figure 6, which is the first embodiment of the present invention, and provides a cleaning device for a falling film evaporation vertical pipe, which can achieve the effect of brushing the evaporation pipe 100 of the vertical pipe falling film evaporation equipment without climbing. It includes the evaporation pipe 100, and also includes a shell 200 arranged in the evaporation pipe 100, and the bottom end of the shell 200 is closed, and the bottom end of the shell 200 is threadedly connected with a gas joint 400, a partition 201 is arranged in the shell 200, and the outer wall of the shell 200 is sealed with a rubber sleeve 202, and the inside of the rubber sleeve 202 is connected to the position in the shell 200. In the space below the partition 201, the top of the shell 1 200 is slidably and sealedly sleeved with the shell 2 300, and the top of the shell 2 300 is closed, and the top of the shell 2 300 is connected to the electric brush 500, and the top of the shell 2 300 is provided with a short column 1 201b downward along its axis at the top of the shell 2 300, and the short column 1 201b is slidably sleeved with a sliding sleeve 301a, and the peripheral wall of the sliding sleeve 301a is parallelogram-shaped and hinged with an anti-sliding block 302, and the anti-sliding block 302 is distributed in a ring array with respect to the short column, and the parallelogram structure hinge axis between the sliding sleeve 301a and the anti-sliding block 302 is horizontally arranged. The short column 1 201b is located at the top of the sliding sleeve 301a and is sleeved with a spring 2 301b, and a notch 300a is opened on the side wall of the shell 2 300 corresponding to the position of the anti-sliding block 302, and the anti-sliding block 302 contacts the inner wall of the evaporation tube 100; the partition 201 is provided with a valve group, which includes springs 203 respectively arranged on the top and bottom of the partition 201, and also includes a valve core 204 located between the springs 203, the valve core 204 is cylindrical, and the valve core 204 is hollow, the inner cavity of the valve core 204 is provided with a diaphragm 205 along its radial direction, and the valve core 204 is located in the diaphragm. Rubber pads 206 are sleeved on both sides of 205, and the outer wall of the rubber pad 206 fits the inner wall of the valve core 204 and the side wall of the partition 205, and the two ends of the rubber pad 206 are located on the side away from the partition 205, respectively, with a guide groove 206a and an opening 206b, and the installation directions of the two rubber pads 206 are opposite, the peripheral wall of the valve core 204 is located at the guide groove 206a of the rubber pad 206 with an air inlet 204a, and the peripheral wall of the valve core 204 is located at the opening 206b of the rubber pad 206 with an exhaust port 204b, and the valve core 204 is coaxially plugged with the partition 201.

[0026] Specifically, the shell 1 200 and the shell 2 300 are both cylindrical, and the lower half of the shell 2 300 is sleeved in the shell 1 200, a pair of sealing rings 303 are arranged between the bottom peripheral wall of the shell 2 300 and the inner wall of the shell 1 200, the outer diameter of the upper half of the shell 2 300 is equal to the outer diameter of the shell 1 200, the top edge of the shell 1 200 is contracted inwardly with a side strip 200a, and the peripheral wall of the shell 2 300 is located above the sealing ring 303 and is provided with a retaining ring 304, the shell 2 3 00 A spring 305 is sleeved between the retaining spring 304 and the edge strip 200a, a sealing ring 207 is provided at the top and bottom ends of the rubber sleeve 202, and the outer edge and the inner edge of the sealing ring 207 are bent away from the rubber sleeve 202, the sealing ring 207 is coaxially fixedly connected with the shell 200, the top end surface and the bottom end surface of the rubber sleeve 202 are sealed with the sealing ring 207, and the opening edge of the rubber sleeve 202 is matched and hung in the groove between the inner edge of the sealing ring 207 and the outer wall of the shell 200.

[0027] The working principle and advantages of the device are further explained in combination with the prior art: the height of the vertical tube falling film evaporation equipment is relatively high, and it is difficult to brush the evaporation tube 100 in the tower. In addition, since the evaporation tube 100 of this type of equipment has a small diameter, the pipeline cleaning robots on the market that can achieve vertical climbing are, firstly, relatively expensive, and secondly, difficult to work within a small diameter.

[0028] The present invention mainly provides a device that can vertically climb in a small-diameter pipe and perform cleaning operations. The cleaning function is partially completed by an electric brush 500 at the top, wherein the bristles can be made of copper wire to obtain a better cleaning effect without damaging the inner wall of the evaporation tube 100.

[0029] The process of the electric brush 500 moving upward along the evaporation tube 100: First, it is explained that the initial state of the valve group on the partition 201 is that the springs 203 are bent downward, the exhaust port 204b located below the valve core 204 is connected to the bottom space of the partition 201, and the exhaust port 204b located above the valve core 204 is sealed by the inner wall of the guide ring 201a; it is also necessary to explain that Figure 5 For example, when the pressure difference increases the pressure inside the rubber pad 206 through the exhaust port 204b and the opening 206b, the outer wall of the rubber pad 206 is closer to the inner wall of the valve core 204, thereby sealing the air inlet 204a and the exhaust port 204b connected to the valve core 204; when the pressure difference causes the gas to enter the valve core 204 through the air inlet 204a, the pressure is introduced between the outer wall of the rubber pad 206 and the inner wall of the valve core 204 through the guide groove 206a reserved in the rubber pad 206, which will cause the rubber pad 206 to sink inward and allow the gas to flow smoothly through the air inlet 204a, the inside of the valve core 204 and the exhaust port 204b, that is, the gas is only allowed to flow one-way from the air inlet 204a to the exhaust port 204b, and is sealed in the opposite direction.

[0030] In the first step, the compressed gas is connected through the gas connector 400. The compressed gas first enters the space in the housing 200 and below the partition 201, and props up the rubber sleeve 202. The rubber sleeve 202 expands and squeezes the inner wall of the evaporation tube 100. The friction and adhesion force make the position of the entire device fixed relative to the evaporation tube 100. During the process, the upper exhaust port 204b of the valve core 204 on the partition 201 is sealed. At the same time, the pressure at the bottom of the partition 201 cannot flow through the exhaust port 204b to the air inlet 204a through the valve core 204. Therefore, the pressure in the rubber sleeve 202 and the shell 200 below the partition 201 will continue to increase until the pressure difference between below and above the partition 201 is large enough to overcome the preset elastic force of the spring 203, pushing the valve core 204 to move upward, so that the spring 203 that was originally convex downward will bulge upward (the total length of the spring 203 remains unchanged, the distance between the spring 203 at the upper and lower ends of the valve core 204 remains unchanged, and the movement distance of the valve core 204 is the height difference between the bottom of the downward convex valley of the spring 203 and the peak of the upward convex valley).

[0031] In the second step, when the valve core 204 moves upward for a certain distance, Figure 3 For example, at this time, the exhaust port 204b and the air inlet 204a on the right side of the valve core 204 on the partition 201 are still sealed, and the exhaust port 204b on the left side of the valve core 204 is out of the range of the guide ring 201a and enters the upper space of the partition 201, and the air inlet 204a corresponding to the exhaust port 204b is still in the state of the lower part of the partition 201. Therefore, the pressure at the lower part of the partition 201 can enter the upper part of the partition 201 through the air inlet 204a and the exhaust port 204b, so that the sliding part between the shell 1 200 and the shell 2 300 is pressurized (it should be noted that the air inlet 204a is designed to be smaller than the exhaust port 204b. This is to reduce the pressure of the compressed gas passing through the valve core. 204 flow rate, to prevent the rubber sleeve 202 from losing pressure quickly and causing the device to fall). The direct effect of the pressurization is to push the shell 2 300 upward relative to the shell 1 200, and compress the spring 1 305 at the same time. The direct effect is to increase the height of the electric brush 500 in the evaporator tube 100, and the increased height can be changed by different shell 1 200 and shell 2 300 sleeve lengths. When the shell 2 300 rises to the top dead center position relative to the shell 1 200 (the spring 1 305 is close to being fully compressed or is fully compressed), the cavity volume between the shell 1 200 and the shell 2 300 will no longer increase, which will cause the pressure to further increase until the upper and lower pressures of the partition 201 are balanced.

[0032] In the third step, the compressed gas pressure connected to the gas joint 400 is released (which can be operated by a solenoid valve), so that the rubber sleeve 202 shrinks due to the rapid reduction of the internal pressure, and then the rubber sleeve 202 is separated from the inner wall of the evaporator tube 100. In this process, the parallelogram connecting rod part between the anti-sliding block 302 and the sliding sleeve 301a overlaps with the lower edge of the notch 300a, and the parallelogram connecting rod part is set in an oblique downward direction outward from the sliding sleeve 301a, and the spring 2 301b always pushes the sliding sleeve 301a downward, which makes the parallelogram connecting rod part tend to be horizontal, so that the anti-sliding block 302 has a tendency to press the inner wall of the evaporator tube 100, and the self-weight of the device and the accessories such as the air pipe connected to the device further increases the squeezing force of the parallelogram connecting rod part on the anti-sliding block 302 along the radial direction of the inner wall of the evaporator tube 100, so that the device is prevented from falling through the friction and adhesion between the anti-sliding block 302 and the inner wall of the evaporator tube 100.

[0033] In the fourth step, as the pressure is further released, the pressure difference between the upper part of the partition 201 and the lower part of the partition 201 gradually increases, and the reset thrust of the spring 1 305 tends to push the shell 1 200 upward relative to the shell 2 300, which makes the volume of the cavity between the shell 1 200 and the shell 2 300 tend to decrease, which helps to increase or maintain the pressure difference, so that the spring 203 on the partition 201 changes from convex upward to convex downward under the action of the pressure difference (in fact, the pressure difference pushes the valve core 204), and the compressed gas on the upper part of the partition 201 can be released to the lower part of the partition 201 through the valve core 204. In the process, the spring 1 305 is reset, and the shell 1 200 and the rubber sleeve 202 are lifted by the spring 1 305.

[0034] Step 5. Repeat steps 1 to 4.

[0035] When the electric brush 500 is raised, the electric brush 500 can be stopped by closing the compressed air intake (neither continuing to increase the pressure nor releasing the pressure).

[0036] After the device climbs to the top of the evaporator tube 100 and the anti-sliding block 302 is upwardly separated from the evaporator tube 100, the rubber sleeve 202 is depressurized so that the entire device can continue to fall for recovery. During the process, the parallelogram connecting rod part between the anti-sliding block 302 and the sliding sleeve 301a will be set in an upward and outward direction. At this time, the anti-sliding block 302 can no longer prevent the device from falling.

[0037] In summary, the device uses compressed gas as the power source for the vertical pipe to climb. The vertical pipe of the device can be driven to climb by repeatedly connecting and releasing the compressed gas. The climbing of the device can be paused at any time by simply blocking the compressed gas. The electric brush 500 can be effectively and stably transported to any height in the evaporator tube 100 for cleaning operations. The device has a simple and compact structure and is suitable for evaporator tubes 100 with smaller diameters.

[0038] Example 2, reference Figure 3~Figure 6 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a valve group structure of a cleaning device for a falling film evaporation vertical pipe, which includes: a guide ring 201a is arranged in the middle of the partition 201, and the guide ring 201a seals and slides to connect the valve core 204, and short columns 301 are arranged between the two ends of the spring sheet 203 and the partition 201. After the two ends of the spring sheet 203 are fixedly connected to the short columns, the spring sheet 203 generates a pre-compression bending, and the curvature of the pre-compression bending of the two spring sheets 203 is the same, the top and bottom ends of the valve core 204 are both arranged in an arc shape, and the middle parts of the two ends of the valve core 204 are spot-welded to the middle parts of the corresponding spring sheets 203.

[0039] The valve group structure is a logic valve, which is responsible for controlling the order of pressure changes in the upper and lower areas of the partition 201. For example, in the first and second steps of Example 1, it is necessary to first establish pressure expansion in the rubber sleeve 202 below the partition 201, temporarily fix the bottom end of the device to the evaporating tube 100, and then increase the pressure above the partition 201. In this way, the rubber sleeve 202 can be used as an anchor point to effectively increase the height of the shell 2 300 and the electric brush 500 relative to the evaporating tube 100.

[0040] The rest of the structure is the same as that of Example 1.

[0041] Example 3, reference Figure 2 and Figure 4 , which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides a power supply method for the electric brush 500 of the cleaning device for the falling film evaporation vertical pipe, which includes: the bristle end of the electric brush 500 is against the inner wall of the evaporation tube 100, a wiring gasket 501 is crimped between the gas joint 400 and the shell 1 200, and a wire 502 is penetrated, sealed and insulated between the shell 1 200 and the shell 2 300. The wiring gasket 501, the shell 1 200 and the shell 2 300 are connected to the negative electrode of the electric brush 500, and the wire 502 is connected to the positive electrode of the electric brush 500.

[0042] This power supply method is for reference only, and you can also use a portable battery to power it.

[0043] The rest of the structure is the same as that of Example 2.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cleaning device for a falling film evaporation vertical pipe, comprising an evaporation pipe (100), characterized in that: It also includes a shell one (200) arranged in the evaporation tube (100), the bottom end of the shell one (200) is closed, and the bottom end of the shell one (200) is threadedly connected to a gas joint (400), a partition (201) is arranged in the shell one (200), the outer wall of the shell one (200) is sealed with a rubber sleeve (202), and the interior of the rubber sleeve (202) is connected to the space located below the partition (201) in the shell one (200), and the top end of the shell one (200) is slidably sealed with a shell two (300), The top of the second shell (300) is closed, the top of the second shell (300) is connected to an electric brush (500), a short column (201b) is arranged downward along the axis of the top of the second shell (300), the short column (201b) is slidably sleeved with a sliding sleeve (301a), the peripheral wall of the sliding sleeve (301a) is hinged with an anti-sliding block (302) in the form of a parallelogram, and the anti-sliding block (302) is distributed in a ring array with respect to the short column (201b), and the anti-sliding block (302) contacts the inner wall of the evaporating tube (100); A pair of sealing rings (303) are arranged between the bottom peripheral wall of the second shell (300) and the inner wall of the first shell (200); a side strip (200a) is contracted inwardly at the top edge of the first shell (200); a retaining spring (304) is arranged on the peripheral wall of the second shell (300) above the sealing ring (303); and a spring (305) is sleeved between the retaining spring (304) and the side strip (200a) of the second shell (300); The parallelogram structure hinge axis between the sliding sleeve (301a) and the anti-sliding block (302) is arranged horizontally, the short column 1 is located at the top end of the sliding sleeve (301a) and is sleeved with a spring 2 (301b), and a notch (300a) is provided on the side wall of the housing 2 (300) at a position corresponding to the anti-sliding block (302); The partition (201) is provided with a valve group, which includes spring sheets (203) respectively arranged at the top and bottom of the partition (201), and also includes a valve core (204) located between the spring sheets (203), the valve core (204) is cylindrical, and the inside of the valve core (204) is hollow, the inner cavity of the valve core (204) is provided with a spacer (205) along its radial direction, and the valve core (204) is provided with rubber pads (206) on both sides of the spacer (205), and the outer wall of the rubber pad (206) is in contact with the inner wall of the valve core (204) and the spacer. The side wall of the valve core (204) is provided with a guide groove (206a) and an opening (206b) at both ends of the rubber pad (206) located on a side away from the partition (205), and the installation directions of the two rubber pads (206) are opposite. The peripheral wall of the valve core (204) is provided with an air inlet (204a) located at the guide groove (206a) of the rubber pad (206), and the peripheral wall of the valve core (204) is provided with an air outlet (204b) located at the opening (206b) of the rubber pad (206). The valve core (204) is coaxially plugged with the partition (201).

2. The cleaning device for falling film evaporation vertical pipe according to claim 1, characterized in that: The shell one (200) and the shell two (300) are both cylindrical, and the lower half of the shell two (300) is sleeved in the shell one (200), and the outer diameter of the upper half of the shell two (300) is equal to the outer diameter of the shell one (200).

3. The cleaning device for falling film evaporation vertical pipe according to claim 2, characterized in that: The top and bottom ends of the rubber sleeve (202) are both provided with sealing rings (207), and the outer edge and the inner edge of the sealing ring (207) are both bent in a direction away from the rubber sleeve (202), and the sealing ring (207) is coaxially fixedly connected to the housing 1 (200).

4. The cleaning device for falling film evaporation vertical pipe according to claim 3, characterized in that: The top end surface and the bottom end surface of the rubber sleeve (202) are both sealed and fitted with the sealing ring (207), and the opening edge of the rubber sleeve (202) is matched and hung in the groove between the inner edge of the sealing ring (207) and the outer wall of the shell (200).

5. The cleaning device for falling film evaporation vertical pipe according to claim 4, characterized in that: A guide ring (201a) is provided in the middle of the partition (201), and the guide ring (201a) seals and slides with the valve core (204), and short columns (301) are provided between both ends of the spring sheet (203) and the partition (201).

6. The cleaning device for falling film evaporation vertical pipe according to claim 5, characterized in that: After the two ends of the spring sheet (203) are fixedly connected to the short column, the spring sheet (203) generates a pre-compression bend, and the arcs of the pre-compression bends of the two spring sheets (203) are the same.

7. The cleaning device for the falling film evaporation vertical pipe according to claim 6, characterized in that: The top and bottom ends of the valve core (204) are both arranged in an arc shape, and the middle parts of both ends of the valve core (204) are spot-welded to the middle parts of the corresponding spring sheets (203).

8. The cleaning device for falling film evaporation vertical pipe according to claim 7, characterized in that: The bristle ends of the electric brush (500) are in contact with the inner wall of the evaporation tube (100); a wiring gasket (501) is crimped between the gas joint (400) and the shell one (200); a wire (502) penetrates, seals and insulates between the shell one (200) and the shell two (300); the wiring gasket (501), the shell one (200) and the shell two (300) are connected to the negative pole of the electric brush (500); and the wire (502) is connected to the positive pole of the electric brush (500).

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