Oil smoke suction cover structure for wet-process battery diaphragm production
By designing a suitable fume hood structure, the problems of dead corners and condensation of oil fumes in lithium battery separator production have been solved, achieving efficient oil fume capture and automatic oil discharge, thus improving production efficiency and product quality.
Patent Information
- Application Number
- CN202520276995.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-20
AI Technical Summary
In the existing technology, during the wet production process of lithium battery separators, there are large dead zones for oil fume dispersion, and the condensation of oil fume leads to the accumulation of oil stains, which also contaminates the surface of the separator and reduces the product yield.
A fume hood structure including a front fume hood and a rear fume hood was designed. It adopts a flat-mouth-shaped smoke inlet and an oil collection tank, combined with a mica heating plate and a negative pressure chamber to form a stable negative pressure zone. The flat-mouth-shaped smoke inlet accurately captures oil fumes, and the oil collection tank automatically discharges oil by gravity flow design.
It significantly improves the efficiency of fume treatment, reduces equipment maintenance frequency and cleaning costs, prevents oil stains from adhering, and improves product yield.
Smart Images
Figure CN223847728U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery diaphragm production technical field more specifically, relate to a kind of oil fume hood structure for wet battery diaphragm production. BACKGROUND
[0002] In the wet production process of lithium battery diaphragm, when high-temperature die continuously extrudes slurry containing organic solvent, a large amount of viscous oil fume will be released. Such oil fume is easy to liquefy in a high-temperature environment and adhere to the surface of equipment, especially forming stubborn oil stains in the smoke suction port of the oil fume hood and the inner wall of the pipeline, which leads to the gradual attenuation of negative pressure adsorption efficiency. At the same time, the dripping of adhered oil stains can pollute the surface of the diaphragm and reduce product yield.
[0003] The prior art generally adopts the structure of a centrifugal fan cooperating with a single-sided smoke hood to realize oil fume suction through a pipeline negative pressure, but has the following significant defects: 1. The circular or square smoke suction port of the traditional smoke hood does not match the flattened flow channel form of the high-temperature die, resulting in a high proportion of oil fume escape dead angle area; 2. No temperature control module is provided, and the inhaled oil fume quickly condenses in the low-temperature section pipeline, aggravating oil stain accumulation; 3. The oil collection structure is mostly a flat tank, which is easy to leave oil residue.
[0004] Therefore, there is an urgent need for an oil fume hood structure that is adapted to the form of the die and can be continuously and stably operated to solve the defects in the background art. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide an oil fume hood structure that is adapted to the form of the die and can be continuously and stably operated.
[0006] The utility model provides an oil fume hood structure for wet battery diaphragm production, comprising:
[0007] The front oil fume hood and the rear oil fume hood both include a negative pressure cavity located on the die head side of the high-temperature die;
[0008] The negative pressure cavity top is provided with a wind pipe interface for connecting an external air suction pipeline to form a negative pressure area;
[0009] The negative pressure cavity bottom is provided with a flat mouth-shaped smoke suction port, and the opening direction thereof faces the oil fume escape direction of the high-temperature die;
[0010] The outer side of the smoke suction port is provided with a mica heating plate for heating the inhaled oil fume;
[0011] The negative pressure cavity bottom is further provided with an oil collection tank, the oil collection tank includes a high point and a low point with a preset height difference, and the low point is provided with an oil discharge port.
[0012] Optionally, the high point and the low point are located on the length of the oil collection tank.
[0013] Optionally, the height difference of the bottom of the oil collecting groove is designed as a flow guide structure that is inclined from the center to both sides, the high point is located at the center, and the two low points are respectively located at the lowest ends of the two sides of the oil collecting groove.
[0014] Optionally, the cross section of the flat mouth shaped smoke suction port is a trapezoidal structure.
[0015] Optionally, the mica heating plate is embedded in the outer wall of the smoke suction port, the heating temperature is 80-120 DEG C, and the temperature is adjusted by a temperature control module.
[0016] Optionally, the air pipe interface is provided with two groups, which are respectively located at the top of the front and rear oil fume hoods.
[0017] Optionally, the oil outlet is connected with a detachable oil collecting bottle, and is provided with a liquid level sensor and an overflow alarm device.
[0018] Optionally, the inner wall of the oil collecting groove is coated with a polytetrafluoroethylene coating.
[0019] According to the technical content disclosed by the utility model, the following beneficial effects are achieved:
[0020] The oil fume hood structure provided by the utility model is cooperatively designed by the negative pressure cavity, the smoke suction port and the oil collecting groove, and the oil fume treatment efficiency in the production of wet battery diaphragm is remarkably improved. The air pipe interface at the top of the negative pressure cavity is connected with the external air suction pipe to form a stable negative pressure area, so that the oil fume circumferentially diffused from the die head is efficiently and directionally captured, the long and narrow opening of the flat mouth shaped smoke suction port is accurately matched with the oil fume escape path of the high temperature die, and the inhaled airflow is continuously heated by the mica heating plate outside, so that the condensation and adhesion of oil fume particles are effectively prevented. The oil stain is automatically gathered through the gravity flow principle by the pre-set height difference at the bottom of the oil collecting groove, the matching ratio of the low point oil outlet and the groove volume guarantees the smooth discharge of oil liquid in the continuous production process, and the blockage and secondary pollution caused by the oil stain retention in the traditional structure are avoided. The overall structure improves the oil fume capture rate, and greatly reduces the equipment maintenance frequency and workshop cleaning cost.
[0021] Other features and advantages of the utility model will become clear through the following detailed description of exemplary embodiments of the utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0022] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the utility model.
[0023] Figure 1 It is an oil fume hood structure of the utility model.
[0024] Figure 2 It is the front oil fume cover and rear oil fume cover structure schematic view of the utility model.
[0025] Mark explanation: 1, front oil fume cover, 2, rear oil fume cover, 3, high temperature mould, 4, mica heating plate, 5, oil fume area, 6, air pipe interface, 7, negative pressure cavity, 8, smoke suction port, 9, oil collecting groove, 10, oil discharge port. DETAILED DESCRIPTION
[0026] Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present utility model unless specifically stated otherwise.
[0027] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the present utility model and its application or uses.
[0028] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, the techniques, methods, and apparatus should be considered as part of the description of the present utility model.
[0029] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.
[0030] Note that like reference numerals and letters in the various figures indicate like items, and once an item is defined in one figure, it need not be discussed further in subsequent figures.
[0031] Referring to Figure 1 and Figure 2 The utility model discloses a kind of oil fume suction cover structures for wet-process battery diaphragm production, including the front oil fume cover 1 and rear oil fume cover 2 of symmetrical arrangement in the die head front and rear sides of high temperature mould 3, both include the negative pressure cavity 7 located in the die head perimeter side of high temperature mould 3, two groups of air pipe interface 6 are welded in the top of front oil fume cover 1 and rear oil fume cover 2, pass through flange and connect external centrifugal fan. Among them, front oil fume cover 1 and rear oil fume cover 2 are made of 304 stainless steel, thickness 2mm, are fixed on the mounting base near high temperature mould 3 by bolt;The cover body of front oil fume cover 1 and rear oil fume cover 2 and the outer wall junction of high temperature mould 3 are provided with high-temperature-resistant silica gel sealing strip (working temperature-20 ℃ ~ 200 ℃), prevent external air from infiltrating.
[0032] A flat-mouthed smoke suction port 8 is formed at the bottom of the negative pressure cavity 7, and a negative pressure area is formed at the smoke suction port 8 during operation. The oil fume in the oil fume area 5 below and around the high-temperature mold 3 is sucked into the negative pressure cavity 7 under the action of negative pressure. Further, the opening section of the flat-mouthed smoke suction port 8 is isosceles trapezoidal, and the opening direction of the flat-mouthed smoke suction port 8 is opposite to the oil fume escaping direction of the high-temperature mold 3.
[0033] The mica heating plate 4 is embedded outside the smoke suction port 8 of the front oil fume cover 1 and the rear oil fume cover 2, and the mica heating plate 4 is arranged continuously along the circumferential wall of the smoke suction port. The temperature sensor monitors the temperature of the heating area in real time, and the temperature is stabilized at 700-140 DEG C through the PID controller, preferably 80-120 DEG C, to prevent oil fume condensation.
[0034] The bottom of the negative pressure cavity 7 is welded with an oil collecting groove 9. In some embodiments, the bottom of the oil collecting groove 9 comprises a high point and a low point with a preset height difference, and the high point and the low point are respectively located at both sides of the length of the oil collecting groove 9. The low point is provided with an oil discharge port 10. The inner wall of the groove body is sprayed with a polytetrafluoroethylene coating to reduce the oil adhesion rate.
[0035] In other embodiments, the bottom adopts a double-inclined-surface flow guide design, which is inclined from the center to both sides. A 25mm height difference is formed between the high point at the center and the low points at both sides of the length, and the low points are provided with oil discharge ports 10. The two oil discharge ports 10 are symmetrically distributed at the positions of the two low points. The inner wall of the groove body is sprayed with a polytetrafluoroethylene coating to reduce the oil adhesion rate.
[0036] The oil discharge port is connected with a quick-release polypropylene collecting bottle. The collecting bottle is provided with a capacitive liquid level sensor. When the liquid level reaches 80%, an audible and light alarm is triggered to prevent overflow.
[0037] In summary, the oil fume cover structure for wet battery diaphragm production provided by the utility model, through the bidirectional negative pressure cavity 7 design of the front oil fume cover 1 and the rear oil fume cover 2, in combination with the top air pipe interface 6 and the external air suction pipeline to form a stable negative pressure area, effectively covers the circumferential area of the high-temperature mold 3, and significantly reduces the oil fume escape. The trapezoidal section of the flat-mouthed smoke suction port 8 is arranged along the oil fume escaping direction of the mold head, and the mica heating plate 4 embedded outside is continuously heated to the suction airflow, thereby reducing the risk of oil fume condensation and adhesion. The preset height difference design of the oil collecting groove 9 realizes automatic oil flow guide through gravity, and the low point oil discharge port 10 is continuously discharged to avoid oil retention. The double air pipe interfaces 6 are separately arranged at the top of the front and rear oil fume covers, and support independent air volume adjustment to adapt to different production conditions. The detachable oil collecting bottle connected with the oil discharge port 10 and the liquid level sensor realize oil storage monitoring and overflow early warning, and simplify the maintenance process. The polytetrafluoroethylene coating on the inner wall of the oil collecting groove 9 greatly reduces the oil adhesion force and prolongs the cleaning cycle.
[0038] While specific embodiments of the application have been described in detail, those familiar with the art will appreciate that the examples given are by way of example and are not meant to limit the scope of the application. Those skilled in the art will recognize or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the application described herein. It is therefore intended that the scope of the application be determined by the following claims.
Claims
1. An oil fume suction hood structure for wet battery separator production, characterized by, The application relates to an oil fume suction cover structure. The oil fume suction cover structure comprises a front oil fume cover (1) and a rear oil fume cover (2), both of which comprise a negative pressure cavity (7) located at the die head side of a high-temperature die (3); The top of the negative pressure cavity (7) is provided with a wind pipe interface (6) for connecting an external air suction pipe line to form a negative pressure area; The bottom of the negative pressure cavity (7) is provided with a flat-mouthed smoke suction port (8) with an opening direction facing the oil fume escaping direction of the high-temperature die (3); The outer side of the smoke suction port (8) is provided with a mica heating plate (4) for heating the inhaled oil fume; The bottom of the negative pressure cavity (7) is further provided with an oil collecting groove (9), the oil collecting groove (9) comprises a high point and a low point with a preset height difference, and the low point is provided with an oil discharge port (10).
2. The oil fume suction cover structure according to claim 1, wherein: The high point and the low point are respectively located at the length of the oil collecting groove (9).
3. The oil fume suction cover structure according to claim 1, wherein: The height difference of the bottom of the oil collecting groove (9) is designed as a flow guide structure inclined from the center to both sides, the high point is located at the center, and the two low points are respectively located at the lowest ends of the two sides of the oil collecting groove (9), and the two oil discharge ports (10) are symmetrically distributed at the positions of the two low points.
4. The hood structure according to any one of claims 1 to 3, characterized in that: The cross section of the flat-mouthed smoke suction port (8) is a trapezoidal structure.
5. The hood structure according to any one of claims 1 to 3, characterized in that: The mica heating plate (4) is embedded in the outer wall of the smoke suction port (8), the heating temperature is 80-120 DEG C, and the temperature is adjusted through a temperature control module.
6. The hood structure according to any one of claims 1 to 3, characterized in that: The wind pipe interface (6) is provided with two groups, respectively located at the top of the front oil fume cover (1) and the rear oil fume cover (2).
7. The hood structure according to any one of claims 1 to 3, characterized in that: The oil discharge port (10) is connected with a detachable oil collecting bottle and is provided with a liquid level sensor and an overflow alarm device.
8. The hood structure according to any one of claims 1 to 3, characterized in that: The inner wall of the oil collecting groove (9) is coated with a polytetrafluoroethylene coating.