Collecting device and method for liquid surface pollutants in cleaning tank

Abstract

The invention discloses a device and a method for collecting liquid surface pollutants in a cleaning tank, and relates to the technical field of cleaning. The device comprises a collecting tank, a floating ball, a first guide piece, a lifting baffle, an infusion pump and the like. The side wall of the collecting tank is provided with a hollow groove and a first guide groove. The floating ball is connected with the lifting baffle and ascends and descends along with the liquid level. By adjusting the relative height of the floating ball and the baffle and the flow of the infusion pump, the top end of the baffle is 2-5 mm lower than the liquid level of the cleaning tank, pollutants floating on the surface of the cleaning tank enter the collecting tank through the hollowed-out tank, the infusion pump pumps liquid containing the pollutants into the container, and the baffle blocks a solution below the liquid level. The influence on the entry of pollutants floating on the surface caused by excessive tank liquid below the liquid level of the treatment tank into the collecting tank is prevented. The collecting method is based on the device and comprises the steps of fixing the collecting tank, adjusting the relative height of the floating ball and the liquid level of the solution in the treatment tank, clamping and fixing the baffle and the like. The device can effectively collect pollutants accumulated on the surface of the treatment tank, guarantee collection and separation of the pollutants and keep the tank liquid of the treatment tank clean.

Description

Technical Field

[0001] The invention relates to the technical field of surface cleaning, and in particular to a device and method for collecting pollutants on the surface of liquid in a cleaning tank. Background Art

[0002] In existing surface cleaning companies, they often face the problem of secondary pollution after product cleaning. At present, a layer of oil and other pollutants easily floats on the surface of the tank liquid in the cleaning tank. When the product is out of the tank after cleaning, the floating oil and floating objects on the surface will adhere to the surface of the product, thus forming secondary pollution.

[0003] The existing conventional tank liquid circulation device mainly extracts the cleaning liquid in the cleaning tank, and the suction port goes deep into the middle or bottom of the cleaning tank. Even if some of them are designed with an overflow tank, the surface pollutants in the cleaning tank can be discharged into the overflow tank. However, in order not to suck in air, the suction port must be lower than the liquid level of the cleaning tank, and almost no pollutants on the surface of the cleaning tank will be extracted to the treatment tank, and the floating objects and oil on the surface cannot be effectively drawn to the treatment device for separation. This results in that even if the tank liquid is circulated, the surface of the product is still susceptible to secondary pollution by floating pollutants, which seriously affects the cleaning effect and product quality. At the same time, the floating pollutants on the surface are mainly grease substances. If they are not separated immediately, they will consume a large amount of effective ingredients in the cleaning tank, affecting the service life of the cleaning tank liquid. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for collecting pollutants on the surface of liquid in a cleaning tank to solve the problems existing in the above-mentioned prior art, remove pollutants floating on the surface of the cleaning liquid, avoid secondary contamination of the cleaned products, and improve the cleaning effect.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a device for collecting pollutants on the surface of liquid in a cleaning tank, comprising:

[0007] A collecting trough, which is a box body with only the top open, a plurality of vertical or inclined hollow grooves and at least one vertical first guide groove are provided on the side wall of the collecting trough, and a liquid outlet is provided on the bottom surface of the collecting trough;

[0008] A plurality of floating balls arranged in the collecting tank;

[0009] A first guide member, wherein the first guide groove, the float and the first guide member correspond to each other, one end of the first guide member is connected to the corresponding float, and the first guide member passes through the corresponding first guide groove and is slidably matched with the corresponding first guide groove;

[0010] A lifting baffle is arranged outside the collecting trough, the lifting baffle blocks part of the side wall of the collecting trough, and the lifting baffle can block the part of all the hollow grooves located below the top end of the lifting baffle and the part of all the first guide grooves located below the top end of the lifting baffle; a vertical second guide groove is arranged on the lifting baffle corresponding to each of the first guide members, the first guide member passes through the corresponding second guide groove, a baffle is fixedly arranged at the other end of the first guide member, an adjusting nut is also threadedly connected to the first guide member, the adjusting nut and the baffle can clamp and fix the lifting baffle, and the first guide member can slide with the corresponding second guide groove; a second guide member is also arranged on each of the second guide grooves, the second guide member corresponds to the first guide groove one by one, and the second guide member slides with the corresponding first guide groove;

[0011] A liquid pump, wherein the liquid pumping port is connected to the liquid outlet through a connecting pipe, and the liquid pump is used to pump the liquid in the collecting tank into the processing tank.

[0012] Preferably, the collecting tank is in the shape of a cuboid or a cylinder;

[0013] When the collecting trough is in a rectangular shape, the lifting baffle includes a main baffle and two side baffles respectively perpendicular to the main baffle, one of the side baffles is fixedly connected to one end of the main baffle, and the other side baffle is fixedly connected to the other end of the main baffle.

[0014] Preferably, the length of the main baffle is 3 mm to 5 mm greater than the length of the collecting tank, ensuring that the lifting baffle can slide freely up and down outside the collecting tank as the liquid level in the main tank changes, maintaining the height difference between the top of the lifting baffle and the liquid level in the cleaning tank.

[0015] Preferably, the number of the float, the number of the first guide groove, the number of the first guide member and the number of the second guide groove are two, and one of the second guide grooves is arranged on one of the side baffles, and the other of the second guide grooves is arranged on the other of the side baffles.

[0016] Preferably, the first guide member is a screw rod.

[0017] Preferably, the width of the hollow groove is 2 mm to 10 mm, and the distance between the top of the hollow groove and the top of the collecting groove is 50 mm to 150 mm.

[0018] Preferably, the width of the first guide groove is 3 mm to 8 mm, and the distance between the top of the first guide groove and the top of the collecting groove is 50 mm to 250 mm.

[0019] Preferably, a filter screen is fixedly provided on the liquid outlet, and the filter screen covers the liquid outlet, and the filter screen is used to prevent block-shaped and sheet-shaped objects from entering the liquid outlet, being sucked into the liquid pump and clogging the pipeline.

[0020] Preferably, the edge of the filter screen is welded or threadedly connected to the edge of the liquid outlet.

[0021] The present invention also provides a method for collecting contaminants on the surface of liquid in a cleaning tank, based on the above-mentioned device for collecting contaminants on the surface of liquid in a cleaning tank, comprising the following steps:

[0022] (1) The collecting tank is fixedly arranged in the cleaning tank, and the top of the collecting tank is flush with the groove edge of the top of the cleaning tank, so that the liquid containing the surface floating objects in the cleaning tank enters the collecting tank, and the liquid pump is turned on;

[0023] (2) adjusting the relative height between the float and the lifting baffle and the flow rate of the liquid pump so that the top of the lifting baffle can be maintained at a height 2 mm to 5 mm lower than the liquid level in the cleaning tank, and then adjusting the adjusting nut so that the adjusting nut and the baffle clamp the lifting baffle, thereby fixing the float and the lifting baffle, and maintaining the relative position of the lifting baffle and the liquid level in the cleaning tank, so that the pollutants on the surface of the liquid in the cleaning tank flow into the collection tank in time, and then are pumped into the treatment tank by the liquid pump, and are separated and purified in the treatment tank;

[0024] (3) Continue to collect the liquid surface pollutants until all the liquid surface pollutants continuously generated in the cleaning tank are collected.

[0025] Compared with the prior art, the present invention has achieved the following technical effects:

[0026] The device and method for collecting contaminants on the surface of liquid in a cleaning tank of the present invention can allow contaminants on the surface of liquid to flow into the cleaning tank through the hollow groove, while the liquid in the cleaning tank cannot enter the collection tank in large quantities due to the obstruction of the lifting baffle plate. Pollutants floating on the surface of the cleaning liquid can be effectively removed, secondary contamination of the cleaned product can be avoided, and the cleaning effect is improved.

[0027] Furthermore, the setting of the float and the first guide member can adjust the height of the lifting baffle as the liquid level changes, ensuring that the lifting baffle always remains at a position a certain height lower than the liquid level in the cleaning tank, thereby effectively preventing excessive clean liquid in the cleaning tank from entering the collection tank, thereby improving the targeted collection of pollutants.

[0028] Furthermore, the first guide member passes through the first guide groove and the second guide groove, and the lifting baffle is clamped and fixed by adjusting the nut and the baffle, so that the relative height of the float and the lifting baffle can be adjusted according to actual conditions to adapt to different liquid level heights and pollutant contents.

[0029] Furthermore, the collecting tank can be designed as a rectangular parallelepiped, and the lifting baffle includes a main baffle and a side baffle. This structural design is more flexible and can better adapt to cleaning tanks of different shapes and sizes. In addition, the collecting tank can also be designed as a cylindrical shape, and correspondingly, the lifting baffle is designed as an arc plate.

[0030] Furthermore, a filter screen is provided on the liquid outlet to filter out impurities in the collected liquid and prevent the impurities from entering the liquid extraction pump and the processing tank, thereby ensuring the purity of the collected pollutants.

[0031] Furthermore, the edge of the filter screen is welded or threadedly connected to the edge of the liquid outlet to ensure the firmness of the filter screen and prevent the filter screen from falling off during the collection process.

[0032] Furthermore, the first guide member is a screw rod, which is low in cost and easy to obtain. The structure of the entire collecting device is relatively simple, easy to manufacture and install, and reduces production costs and maintenance difficulties.

[0033] Furthermore, by adjusting the relative height between the float and the lifting baffle and the flow rate of the liquid pump, the position of the lifting baffle can be accurately controlled so that it is always maintained at an optimal collection height to ensure the collection effect.

[0034] Furthermore, maintaining the top of the lifting baffle at a height 2 mm to 5 mm lower than the liquid level in the cleaning tank can collect pollutants to the greatest extent while reducing the entry of clean liquid.

[0035] Furthermore, the collection method can quickly and effectively collect pollutants on the surface of the liquid in the cleaning tank, reducing secondary contamination of the pollutants to the product, thereby improving the cleaning efficiency of the cleaning tank and the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0037] Figure 1 A front view of a device for collecting pollutants on the surface of liquid in a cleaning tank of the present invention;

[0038] Figure 2A side view of a device for collecting pollutants on the surface of liquid in a cleaning tank of the present invention;

[0039] Figure 3 A top view of a device for collecting pollutants on the surface of liquid in a cleaning tank of the present invention;

[0040] Figure 4 It is a schematic structural diagram of a collecting tank in a device for collecting pollutants on the surface of liquid in a cleaning tank of the present invention;

[0041] Figure 5 It is a schematic structural diagram of a lifting baffle in a device for collecting pollutants on the surface of liquid in a cleaning tank of the present invention;

[0042] Figure 6 A schematic diagram of the use of the device for collecting pollutants on the surface of liquid in a cleaning tank according to the present invention;

[0043] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0044] In the figure: 1, collecting tank; 2, lifting baffle; 3, hollow tank; 4, float; 5, first guide member; 6, second guide member; 7, first guide groove; 8, cleaning tank; 9, liquid level; 10, second guide groove. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The purpose of the present invention is to provide a device and method for collecting pollutants on the surface of liquid in a cleaning tank to solve the problems existing in the above-mentioned prior art, remove pollutants floating on the surface of the cleaning liquid, avoid secondary contamination of the cleaned products, and improve the cleaning effect.

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Embodiment 1

[0049] like Figures 1 to 7 As shown, this embodiment provides a device for collecting pollutants on the surface of liquid in a cleaning tank, comprising:

[0050] The collecting tank 1 is a box body with only the top open, and the side wall of the collecting tank 1 is provided with a plurality of vertical hollow grooves 3 and at least one vertical first guide groove 7, and the bottom surface of the collecting tank 1 is provided with a liquid outlet;

[0051] Two float balls 4 are arranged in the collecting tank 1;

[0052] The first guide member 5, the first guide groove 7, the float 4 and the first guide member 5 correspond to each other one by one, one end of the first guide member 5 is connected to the corresponding float 4, and the first guide member 5 passes through the corresponding first guide groove 7 and slidably cooperates with the corresponding first guide groove 7;

[0053] A lifting baffle plate 2 is arranged outside the collecting trough 1, and the lifting baffle plate 2 blocks part of the side wall of the collecting trough 1, and the lifting baffle plate 2 can block the part of all the hollow grooves 3 located below the top of the lifting baffle plate 2 and the part of all the first guide grooves 7 located below the top of the lifting baffle plate 2; a vertical second guide groove 10 is arranged on the lifting baffle plate 2 corresponding to each first guide member 5, the first guide member 5 passes through the corresponding second guide groove 10, and a baffle is fixed on the other end of the first guide member 5, and an adjusting nut is also threadedly connected on the first guide member 5, and the adjusting nut and the baffle can clamp and fix the lifting baffle plate 2; when the adjusting nut and the baffle are not clamped and fixed to the lifting baffle plate 2, the first guide member 5 can slide with the corresponding second guide groove 10; each of the second guide grooves 10 is also provided with a second guide member 6, the second guide member 6 corresponds to the first guide groove 7 one by one, and the second guide 6 slides with the corresponding first guide groove 7;

[0054] A liquid pump (not shown in the figure), the liquid suction port of the liquid pump is connected with the liquid outlet through a connecting pipe, and the liquid pump is used to pump the liquid in the collection tank 1 into the treatment tank.

[0055] It should be noted that, in specific applications, the number of floats 4 is not limited to two in the present embodiment, and technicians can determine the number of floats 4 according to actual needs, such as the specific gravity of the solution in the cleaning tank 8 and the weight of the lifting baffle 2; specifically, the size and number of floats 4 depend on the weight of the lifting baffle 2 and the volume of water discharged by the floats 4 in the treatment liquid, thereby achieving the relative height between the lifting baffle 2 and the surface of the treatment liquid, ensuring that the floating objects on the surface of the treatment liquid smoothly and effectively enter the collection tank 1, and then are pumped into the separation facility for separation and purification.

[0056] The collecting tank 1 is a box body with only the top open, and the side wall is provided with a plurality of vertical or inclined hollow grooves 3. These hollow grooves 3 allow pollutants (such as oil stains, etc.) on the surface of the liquid in the cleaning tank 8 to enter the collecting tank 1 under the action of liquid flow or buoyancy. A liquid outlet is provided on the bottom surface of the collecting tank 1 for connecting a liquid pump to pump the liquid in the collecting tank 1 into the treatment tank. The float 4 floats on the liquid surface in the collecting tank 1 and rises and falls with the rise and fall of the liquid surface. One end of the first guide member 5 is connected to the float 4, passes through the vertical first guide groove 7 on the side wall of the collecting tank 1 and slides with it. In this way, when the float 4 rises and falls, the first guide member 5 slides in the first guide groove 7 to guide the movement direction of the float 4. The lifting baffle 2 blocks part of the side wall of the collecting tank 1, and can block the part of all the hollow grooves 3 located below the top of the baffle and the part of all the first guide grooves 7 located below the top of the baffle. A vertical second guide groove 10 is provided on the lifting baffle plate 2 corresponding to each first guide member 5. The first guide member 5 passes through the second guide groove 10. A baffle is fixedly provided at the other end of the first guide member 5. An adjusting nut is also threadedly connected to the first guide member 5. By adjusting the adjusting nut, the lifting baffle plate 2 can be clamped and fixed between the baffle plate and the adjusting nut, thereby achieving relative fixation of the floating ball 4 and the lifting baffle plate 2. At this time, the lifting baffle plate 2 is slidably matched with the first guide groove 7 through the first guide member 5 and the second guide member 6.

[0057] When the liquid level in the collection tank 1 rises, the float 4 rises accordingly, driving the first guide 5 to slide upward in the first guide groove 7 and the second guide groove 10. Since the lifting baffle 2 is connected to the float 4 through the first guide 5 and the adjusting nut, the lifting baffle 2 will also rise. Conversely, when the liquid level in the collection tank 1 drops, the float 4 and the lifting baffle 2 will also drop. By adjusting the relative height of the float 4 and the lifting baffle 2 and the flow rate of the liquid pump, the top of the lifting baffle 2 can be maintained at a height of 2mm to 5mm lower than the liquid level 9 in the cleaning tank 8. At this height, the pollutants on the surface of the liquid in the cleaning tank 8 can enter the collection tank 1 through the hollow groove 3, while most of the clean liquid is blocked in the cleaning tank 8 by the lifting baffle 2. The liquid pump pumps the liquid containing pollutants in the collection tank 1 into the treatment tank to collect the pollutants on the surface of the liquid.

[0058] It is worth noting that, although the hollow groove 3 in this embodiment is vertically arranged, in practical applications, it is also possible to arrange the hollow groove 3 to be inclined.

[0059] In the optional scheme of this embodiment, it is more preferred that the collection tank 1 is in a rectangular or cylindrical shape; when the collection tank 1 is in a rectangular shape, the lifting baffle 2 includes a main baffle and two side baffles respectively perpendicular to the main baffle, one side baffle is fixedly connected to one end of the main baffle, and the other side baffle is fixedly connected to the other end of the main baffle. The collection tank 1 is in a rectangular shape, and the lifting baffle 2 includes a main baffle and a side baffle. This structural design is more flexible and can better adapt to cleaning tanks 8 of different shapes and sizes; the length of the main baffle is 3mm to 5mm larger than the length of the collection tank 1. Ensure that the lifting baffle 2 can cover the three sides of the collection tank 1 on the front of the pollutants.

[0060] In the optional scheme of this embodiment, it is more preferred that the number of the float 4, the first guide groove 7, the first guide member 5 and the second guide groove 10 are two each, and one second guide groove 10 is arranged on one side baffle plate, and the other second guide groove 10 is arranged on the other side baffle plate.

[0061] In the optional scheme of this embodiment, it is more preferred that the first guide member 5 is a screw rod. The first guide member 5 is a screw rod, which is low in cost and easy to obtain. The structure of the entire collecting device is relatively simple, easy to manufacture and install, and reduces production costs and maintenance difficulties.

[0062] In the optional scheme of this embodiment, it is more preferred that the width of the hollow groove 3 is 2 mm to 10 mm, and the distance between the top of the hollow groove 3 and the top of the collecting groove 1 is 50 mm to 150 mm.

[0063] In the optional scheme of this embodiment, it is more preferred that the width of the first guide groove 7 is 3 mm to 8 mm, and the distance between the top of the first guide groove 7 and the top of the collecting groove 1 is 50 mm to 250 mm.

[0064] In the optional scheme of this embodiment, it is more preferred that a filter screen is fixed on the liquid outlet, and the filter screen covers the liquid outlet. The filter screen can filter out impurities in the collected liquid, prevent impurities from entering the liquid pump and the processing tank, and ensure the purity of the collected pollutants; at the same time, the filter screen can prevent block-shaped and sheet-shaped objects from entering the liquid outlet, being sucked into the liquid pump and clogging the pipeline.

[0065] In the optional scheme of this embodiment, it is more preferred that the edge of the filter screen is welded or threadedly connected to the edge of the liquid outlet. The edge of the filter screen is welded or threadedly connected to the edge of the liquid outlet to ensure the firmness of the filter screen and prevent the filter screen from falling off during the collection process.

[0066] Embodiment 2

[0067] Reference Figure 6 and Figure 7This embodiment provides a method for collecting contaminants on the surface of liquid in a cleaning tank. The method is based on the device for collecting contaminants on the surface of liquid in a cleaning tank of Embodiment 1 and includes the following steps:

[0068] (1) The collecting tank 1 is fixedly arranged in the cleaning tank 8, and the top of the collecting tank 1 is flush with the top edge of the cleaning tank 8, so that the liquid containing the surface floating objects in the cleaning tank 8 enters the collecting tank 1, and the liquid pump is turned on;

[0069] (2) After the liquid enters the collecting tank 1, the float 4 is floated by the buoyancy of the liquid. The relative height between the float 4 and the lifting baffle 2 and the flow rate of the liquid pump are adjusted so that the top of the lifting baffle 2 can be maintained at a height 2 mm to 5 mm lower than the liquid level 9 in the cleaning tank 8. Then, the adjusting nut is adjusted so that the adjusting nut and the baffle clamp the lifting baffle 2, thereby fixing the float 4 and the lifting baffle 2 and maintaining the relative position of the lifting baffle 2 and the liquid level in the cleaning tank 8, so that the pollutants on the surface of the liquid in the cleaning tank 8 flow into the collecting tank 1 in time, and then are pumped into the treatment tank by the liquid pump, and are separated and purified in the treatment tank;

[0070] (3) The liquid surface pollutants are continuously collected until all the liquid surface pollutants continuously generated in the cleaning tank 8 are collected.

[0071] It is worth mentioning that, as the collection process proceeds, it is possible that the top of the lifting baffle cannot be maintained 3mm to 5mm lower than the liquid level in the cleaning tank 8 due to the decrease of liquid in the cleaning tank 8. Therefore, during the collection process, staff are required to monitor the liquid level in the cleaning tank 8 and add liquid to the cleaning tank 8 when the liquid level drops; or an automatic water replenishing device is added in the cleaning tank 8 to keep the liquid level in the cleaning tank 8 relatively stable.

[0072] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for collecting pollutants on the surface of liquid in a cleaning tank, characterized in that: include: A collecting trough, which is a box body with only the top open, a plurality of vertical or inclined hollow grooves and at least one vertical first guide groove are provided on the side wall of the collecting trough, and a liquid outlet is provided on the bottom surface of the collecting trough; A plurality of floating balls arranged in the collecting tank; A first guide member, wherein the first guide groove, the float and the first guide member correspond to each other, one end of the first guide member is connected to the corresponding float, and the first guide member passes through the corresponding first guide groove and is slidably matched with the corresponding first guide groove; A lifting baffle is arranged outside the collecting trough, the lifting baffle blocks part of the side wall of the collecting trough, and the lifting baffle can block the part of all the hollow grooves located below the top end of the lifting baffle and the part of all the first guide grooves located below the top end of the lifting baffle; a vertical second guide groove is arranged on the lifting baffle corresponding to each of the first guide members, the first guide member passes through the corresponding second guide groove, a baffle is fixedly arranged at the other end of the first guide member, an adjusting nut is also threadedly connected to the first guide member, the adjusting nut and the baffle can clamp and fix the lifting baffle, and the first guide member can slide with the corresponding second guide groove; a second guide member is also arranged on each of the second guide grooves, the second guide member corresponds to the first guide groove one by one, and the second guide member slides with the corresponding first guide groove; A liquid pump, wherein the liquid pumping port is connected to the liquid outlet through a connecting pipe, and the liquid pump is used to pump the liquid in the collecting tank into the processing tank.

2. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 1, characterized in that: The collecting tank is in the shape of a cuboid or a cylinder; When the collecting trough is in a rectangular shape, the lifting baffle includes a main baffle and two side baffles respectively perpendicular to the main baffle, one of the side baffles is fixedly connected to one end of the main baffle, and the other side baffle is fixedly connected to the other end of the main baffle.

3. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 2, characterized in that: The length of the main baffle is 3 mm to 5 mm greater than the length of the collecting tank.

4. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 2, characterized in that: There are two of each of the floating ball, the first guide groove, the first guide member and the second guide groove, and one of the second guide grooves is arranged on one of the side baffles, and the other of the second guide grooves is arranged on the other of the side baffles.

5. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 1, characterized in that: The first guide member is a screw rod.

6. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 1, characterized in that: The width of the hollow groove is 2 mm to 10 mm, and the distance between the top of the hollow groove and the top of the collecting groove is 50 mm to 150 mm.

7. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 1, characterized in that: The width of the first guide groove is 3 mm to 8 mm, and the distance between the top of the first guide groove and the top of the collecting groove is 50 mm to 250 mm.

8. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 1, characterized in that: A filter screen is fixedly arranged on the liquid outlet and covers the liquid outlet. The filter screen is used to prevent block-shaped and sheet-shaped objects from entering the liquid outlet, being sucked into the liquid pump and blocking the pipeline.

9. The device for collecting pollutants on the surface of liquid in a cleaning tank according to claim 8, characterized in that: The edge of the filter screen is welded or threadedly connected to the edge of the liquid outlet.

10. A method for collecting contaminants on the surface of liquid in a cleaning tank, based on the device for collecting contaminants on the surface of liquid in a cleaning tank according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) The collecting tank is fixedly arranged in the cleaning tank, and the top of the collecting tank is flush with the groove edge of the top of the cleaning tank, so that the liquid containing the surface floating objects in the cleaning tank enters the collecting tank, and the liquid pump is turned on; (2) adjusting the relative height between the float and the lifting baffle and the flow rate of the liquid pump so that the top of the lifting baffle can be maintained at a height 2 mm to 5 mm lower than the liquid level in the cleaning tank, and then adjusting the adjusting nut so that the adjusting nut and the baffle clamp the lifting baffle, thereby fixing the float and the lifting baffle, and maintaining the relative position of the lifting baffle and the liquid level in the cleaning tank, so that the pollutants on the surface of the liquid in the cleaning tank flow into the collection tank in time, and then are pumped into the treatment tank by the liquid pump, and are separated and purified in the treatment tank; (3) Continue to collect the liquid surface pollutants until all the liquid surface pollutants continuously generated in the cleaning tank are collected.

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