Spray collecting device for diaphragm spraying area

Abstract

The utility model discloses a droplet collecting device in a diaphragm spraying area. The droplet collecting device comprises a sealing cover arranged on the periphery of a spraying unit and a negative pressure unit arranged on the sealing cover. The sealing cover is provided with a first hole and a second hole, the diaphragm penetrates through the first hole to enter the sealing cover and then penetrates through the second hole to leave the sealing cover, the spraying unit sprays slurry towards the diaphragm in the sealing cover, and the negative pressure unit forms negative pressure in the sealing cover. And the adsorption unit is used for adsorbing droplets sprayed by the spraying unit. Spraying foam generated by the spraying unit only moves in the isolation space formed by the sealing cover and cannot be inhaled by an operator, and therefore the physical health of the operator is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery diaphragms, and particularly relates to a droplet collection device in a diaphragm spraying area. Background Art

[0002] When the diaphragm sprayer is operating, the slurry is broken into fine mist droplets. Most of the droplets are sprayed onto the diaphragm surface, while a small portion drifts into the air, forming droplets that eventually adhere to the areas of the equipment roller not covered by the diaphragm or other parts. Once the mist droplets adhere to the roller, they accumulate more and more as the operation progresses. When production requires a wider diaphragm coating, the residual slurry on the roller must be removed first. However, due to the strong adhesion of the slurry in its wet state, cleaning is difficult and time-consuming, affecting production efficiency.

[0003] Patent application number CN202210566259.7 discloses a device for improving the quality of lithium battery spray diaphragms. The device is characterized in that: the diaphragm quality improvement device includes a roller surface protection device and a dust collection device. The roller surface protection device, located on the lower side of the sprayer, is respectively arranged at both ends of the spray guide roller, and the roller surface protection device can block the exposed portion of the spray guide roller on both sides of the spray film; the dust collection hood of the dust collection device is arranged above the spray head of the sprayer and is connected to the dust collector via a dust collection duct. The dust collection device can create a negative pressure effect at the spray head of the sprayer, so that excess dust generated during spraying is sucked away through the dust collection duct. However, in this solution, the dust collection hood of the dust collection device is arranged above the spray head of the sprayer and is connected to the dust collector via a dust collection duct. When dust drifts away from the dust collection device, some dust may not be collected by the dust collection device due to the weak adsorption force of the dust collection device. If inhaled by the operator, it will affect the operator's health. Utility Model Content

[0004] The purpose of the utility model is to provide a droplet collection device for a diaphragm spraying area, in which the droplets generated by the spraying unit only move within the isolated space formed by the closed cover and will not be inhaled by the operator, thereby ensuring the health of the operator.

[0005] The technical solution adopted by the present invention to solve its technical problems is to propose a droplet collection device for a diaphragm spraying area, comprising a closed cover arranged on the periphery of a spraying unit, and a negative pressure unit provided on the closed cover; a first hole and a second hole are provided on the closed cover, the diaphragm enters the closed cover through the first hole, and then leaves the closed cover through the second hole, the spraying unit sprays slurry toward the diaphragm in the closed cover, and the negative pressure unit forms a negative pressure in the closed cover to absorb the droplets sprayed by the spraying unit.

[0006] In an embodiment of the present application, the spraying unit includes a sprayer and a turntable. The turntable is arranged on the sprayer. The turntable rotates when the sprayer is running to form a mist slurry.

[0007] In an embodiment of the present application, a negative pressure hole is provided on the closed cover, and the negative pressure unit includes a negative pressure tube and an air pump. One end of the negative pressure tube is fixedly connected to the negative pressure hole, and the other end is fixedly connected to the air pump. The air pump is used to extract droplets in the closed cover.

[0008] In an embodiment of the present application, the spraying unit sprays slurry toward the diaphragm in the closed cover in the front-to-back direction, the first hole and the second hole are arranged on the upper and lower end surfaces of the closed cover, and there are two negative pressure holes, which are respectively arranged on the left and right end surfaces of the closed cover.

[0009] In an embodiment of the present application, the distance between the negative pressure hole and the diaphragm is equal to the distance between the negative pressure hole and the spraying unit.

[0010] In the embodiment of the present application, two guide plates are provided in the closed cover, and the two guide plates are respectively provided on the left and right end surfaces of the closed cover, and the two guide plates are detachably connected to the closed cover.

[0011] In an embodiment of the present application, the guide plate is in the shape of a trumpet with an inner diameter gradually increasing along the side where the spraying unit is located.

[0012] In an embodiment of the present application, a filter unit is provided on the negative pressure tube, and the filter unit is used to filter the droplets adsorbed by the negative pressure unit.

[0013] In the embodiment of the present application, the filter unit is a filter element that is detachably arranged on the negative pressure pipe.

[0014] In the embodiment of the present application, the sealing cover is made of transparent material.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model proposes a diaphragm spraying area droplet collection device, which places the spray unit in an enclosed cover. The droplets generated by the spray unit move only within the isolated space formed by the enclosed cover and will not be inhaled by the operator, thereby protecting the operator's health.

[0017] 2. The utility model proposes a diaphragm spraying area droplet collection device. Two guide plates are provided in the closed cover. The two guide plates are respectively arranged on the left and right end surfaces of the closed cover. The two guide plates are detachably connected to the closed cover. When the negative pressure unit is in operation, the adsorbed droplets either enter the negative pressure hole under the guidance of the guide plates or fall on the guide plates. After long-term use, the guide plates can be replaced to reduce the number of replacements of the closed cover.

[0018] 3. The utility model proposes a diaphragm spraying area droplet collection device, in which a filter unit is provided on the negative pressure pipe. The filter unit is used to filter the droplets in the negative pressure pipe, thereby ensuring the negative pressure size in the negative pressure pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0020] Figure 1 This is a front view of a droplet collection device for a diaphragm spraying area according to an embodiment of the present utility model;

[0021] Figure 2 This is a front view of the internal structure of a closed cover of a droplet collection device in a diaphragm spraying area according to an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of a spray unit of a droplet collection device in a diaphragm spraying area according to an embodiment of the present invention;

[0023] Figure 4 This is a top view of a droplet collection device for a diaphragm spraying area according to an embodiment of the present utility model;

[0024] Figure 5 This is a top view of the internal structure of a closed cover of a droplet collection device in a diaphragm spraying area according to an embodiment of the present invention;

[0025] Figure 6 This is a side view of a droplet collection device for a diaphragm spraying area according to an embodiment of the present utility model;

[0026] Figure 7 This is a side view of the internal structure of a closed cover of a droplet collection device in a diaphragm spraying area according to an embodiment of the present utility model.

[0027] In the figure: 1. spray unit; 11. spray machine; 12. turntable; 2. sealing cover; 21. negative pressure hole; 22. guide plate; 3. negative pressure unit; 31. negative pressure pipe; 32. vacuum pump; 4. first hole; 5. second hole; 6. filter unit; 7. diaphragm. DETAILED DESCRIPTION

[0028] To more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following describes specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the drawings described below are merely examples of the present invention. A person skilled in the art can, without inventive effort, derive other drawings and other embodiments from these drawings. Furthermore, design orientations only represent relative positional relationships between components, not absolute positional relationships.

[0029] The embodiment of the utility model provides a device for collecting droplets in the membrane spraying area. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 , mainly includes a spraying unit 1, a sealing cover 2, and a negative pressure unit 3.

[0030] In an embodiment of the present application, a diaphragm spraying area droplet collection device includes a spray unit 1, a closed cover 2, and a negative pressure unit 3. The spray unit 1 is used to spray a mist slurry toward the diaphragm, wherein most of the mist slurry is sprayed on the surface of the diaphragm, and a small part is scattered in the air to form droplets. The closed cover 2 is arranged on the periphery of the spray unit 1 to form an isolation space. The closed cover 2 is provided with a first hole 4, a second hole 5 and a negative pressure unit 3. The diaphragm passes through the first hole 4 to enter the closed cover 2. The spray unit 1 sprays slurry toward the diaphragm in the closed cover 2. The negative pressure unit 3 forms a negative pressure in the closed cover 2, and then extracts the droplets in the closed cover 2 to remove the droplets generated by the spray unit 1, and then the diaphragm leaves the closed cover 2 through the second hole 5. In the present application, by arranging the spray unit 1 in the closed cover 2, the droplets generated by the spray unit 1 only move in the isolation space formed by the closed cover 2 and will not be inhaled by the operator, thereby ensuring the health of the operator.

[0031] In one embodiment, the spraying unit 1 includes a sprayer 11 and a turntable 12. The turntable 12 is arranged on the sprayer 11. When the sprayer 11 sprays the slurry, the turntable 12 rotates, and the slurry is divided into fine mist droplets by the turntable 12, thereby forming mist slurry.

[0032] In one embodiment, the closed cover 2 is provided with a negative pressure hole 21, and the negative pressure unit 3 includes a negative pressure tube 31 and an air pump 32. One end of the negative pressure tube 31 is fixedly connected to the negative pressure hole 21, and the other end is fixedly connected to the air pump 32. The air pump 32 is operated to extract air and droplets from the closed cover 2. The negative pressure unit 3 also includes an air extraction pipe, one end of which is fixedly connected to the air extraction pump 32.

[0033] Specifically, the enclosure 2 is square in shape, and the spray unit 1 sprays slurry toward the diaphragm within the enclosure 2 in the front-to-back direction. The first hole 4 and the second hole 5 are arranged on the upper and lower end surfaces of the enclosure 2. Two negative pressure holes 21 are provided, one on the left and right end surfaces of the enclosure 2. The transportation of the diaphragm, the spraying of the spray unit 1, and the removal of droplets are performed in three different directions, thereby avoiding interference between the various processes. Furthermore, the two negative pressure holes 21 are provided on the left and right end surfaces of the enclosure 2. Compared to providing the negative pressure unit 3 only on one side, the negative pressure unit 3 on one side requires a greater negative pressure to completely remove the droplets within the enclosure 2. In this case, the negative pressure provided by the negative pressure unit 3 will affect the spraying effect of the spray unit 1, resulting in a poorer spraying effect on the side closest to the negative pressure unit 3. However, by providing both negative pressure units 3 on both sides of the enclosure 2, the negative pressure units 3 only require a smaller negative pressure to completely remove the droplets within the enclosure 2, without affecting the normal operation of the spray unit 1, thereby making the spraying of the spray unit 1 more uniform.

[0034] Preferably, the distance between the negative pressure hole 21 and the spray unit 1 is equal to the distance between the negative pressure hole 21 and the diaphragm. It should be noted that the distance here refers to the straight-line distance between the negative pressure hole 21 and the spray unit 1 in the front-to-back direction, and the straight-line distance between the negative pressure hole 21 and the diaphragm in the front-to-back direction.

[0035] It is foreseeable that, with the arrangement of the negative pressure unit 3, the droplets generated by the spray unit 1 will drift to the left and right sides of the closed cover 2. The drifted droplets may be directly adsorbed on the surface of the closed cover 2 without entering the negative pressure tube 31. The accumulation of droplets will affect the subsequent spraying and adsorption. At this time, the closed cover 2 needs to be replaced. In order to reduce the number of replacements of the closed cover 2, two guide plates 22 are provided in the closed cover 2. The two guide plates 22 are respectively provided on the left and right end faces of the closed cover 2. The two guide plates 22 are detachably connected to the closed cover 2. When the negative pressure unit 3 is in operation, the adsorbed droplets either enter the negative pressure hole 21 under the guiding effect of the guide plates 22 or fall on the guide plates 22. After long-term use, the number of replacements of the closed cover 2 can be reduced by replacing the guide plates 22. Specifically, the guide plates 22 are trumpet-shaped with an inner diameter gradually increasing along the side where the spray unit 1 is located.

[0036] In one embodiment, as droplets move through the negative pressure tube 31, the probability of contact between the droplets and the negative pressure tube 31 increases as the distance and number of droplets travel increases. If droplets adhere to the inner wall of the negative pressure tube 31, the negative pressure within the negative pressure tube 31 will be affected. To this end, a filter unit 6 is provided on the negative pressure tube 31 to filter the droplets within the negative pressure tube 31.

[0037] Furthermore, the filter unit 6 is detachably connected to the negative pressure tube 31 , so that the filter unit 6 can be replaced in time.

[0038] Specifically, the filter unit 6 includes a filter element, a top cover and an outer shell that are detachably arranged on the negative pressure pipe 31. The filter element is arranged in the outer shell, and the top cover is connected to the outer shell by bolts or other connection methods. An air inlet and an air outlet are arranged on the outer shell. The air inlet and the air outlet are respectively connected to the first negative pressure pipe and the second negative pressure pipe. The first negative pressure pipe is connected to the negative pressure hole 21. The gas extracted by the first negative pressure pipe is filtered by the filter element in the outer shell and then discharged from the second negative pressure pipe.

[0039] In one embodiment, the enclosing cover 2 is made of a transparent material, so that the operator can directly observe the internal conditions of the enclosing cover 2 and deal with the failure of the spraying unit 1 in a timely manner.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0041] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific embodiments of the present invention are not limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. A droplet collection device for a diaphragm spraying area, characterized in that: The invention comprises a closed cover (2) arranged on the periphery of a spraying unit (1), and a negative pressure unit (3) provided on the closed cover (2); a first hole (4) and a second hole (5) are provided on the closed cover (2); the diaphragm passes through the first hole (4) to enter the closed cover (2), and then passes through the second hole (5) to leave the closed cover (2); the spraying unit (1) sprays slurry toward the diaphragm in the closed cover (2), and the negative pressure unit (3) forms a negative pressure in the closed cover (2) to absorb the droplets sprayed by the spraying unit (1).

2. A droplet collection device for a diaphragm spraying area according to claim 1, characterized in that: The spraying unit (1) comprises a sprayer (11) and a turntable (12), wherein the turntable (12) is arranged on the sprayer (11), and the turntable (12) rotates when the sprayer (11) is in operation to form a mist slurry.

3. A droplet collection device for a diaphragm spraying area according to claim 1, characterized in that: The closed cover (2) is provided with a negative pressure hole (21), and the negative pressure unit (3) comprises a negative pressure tube (31) and an air pump (32). One end of the negative pressure tube (31) is fixedly connected to the negative pressure hole (21), and the other end is fixedly connected to the air pump (32). The air pump (32) is used to extract droplets in the closed cover (2).

4. A droplet collection device for a diaphragm spraying area according to claim 3, characterized in that: The spraying unit (1) sprays slurry toward the diaphragm in the closed cover (2) along the front-back direction. The first hole (4) and the second hole (5) are arranged on the upper and lower end surfaces of the closed cover (2). Two negative pressure holes (21) are provided, and the two negative pressure holes (21) are respectively arranged on the left and right end surfaces of the closed cover (2).

5. A droplet collection device for a diaphragm spraying area according to claim 4, characterized in that: The distance between the negative pressure hole (21) and the diaphragm is equal to the distance between the negative pressure hole (21) and the spraying unit (1).

6. A droplet collection device for a diaphragm spraying area according to claim 4, characterized in that: Two guide plates (22) are provided in the closed cover (2), and the two guide plates (22) are respectively provided on the left and right end surfaces of the closed cover (2), and the two guide plates (22) are detachably connected to the closed cover (2).

7. A droplet collection device for a diaphragm spraying area according to claim 6, characterized in that: The guide plate (22) is in the shape of a trumpet, the inner diameter of which gradually increases along the side where the spray unit (1) is located.

8. The droplet collection device for a diaphragm spraying area according to claim 3, characterized in that: The negative pressure tube (31) is provided with a filter unit (6), and the filter unit (6) is used to filter the droplets adsorbed by the negative pressure unit (3).

9. A droplet collection device for a diaphragm spraying area according to claim 8, characterized in that: The filter unit (6) is a filter element detachably arranged on the negative pressure pipe (31).

10. The droplet collection device for a diaphragm spraying area according to claim 1, characterized in that: The sealing cover (2) is made of transparent material.

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