A filtration device for etching solution production

Abstract

The purpose of this utility model is to provide a filtration device for etching solution production, including a production tank and a filter, a pipeline connecting the production tank, and a filter tube connecting the pipeline and the filter. The filter tube has a "U" shaped structure and includes a left tube, a right tube, and a connecting tube located between the left and right tubes. A replaceable filter screen is provided on the left tube near the connecting tube. Openings for the filter screen to pass through are provided on the two opposite walls of the left tube. A sealing mechanism for sealing the openings is provided on the left tube. A storage compartment for unused filter screens is provided on the left tube. A collection compartment for used filter screens is also provided on the left tube. An openable and closable inspection port is provided in the middle of the connecting tube. This invention solves the problem that existing filtration devices for etching solution production cannot remove packaging debris and other impurities, as well as large particles such as sand, in a timely manner, thus affecting filtration efficiency.

Description

Technical Field

[0001] This utility model relates to the field of etching solution production technology, and specifically to a filtration device for etching solution production. Background Technology

[0002] Etching solution is a crucial raw material used for etching circuit boards during production, and its purity directly affects the processing precision and quality of the product. In the etching solution production process, various packaged raw materials are unpacked and poured into a mixing tank; then, they are mixed and stirred to form the etching solution. However, during production, it was discovered that impurities such as packaging debris from the raw materials, as well as large particles like sand embedded in the loading and unloading vehicles or attached to the raw material packaging, are present. Therefore, these impurities need to be filtered out before the etching solution can be pumped into a storage tank for storage. Existing technology, patent number 201720093844.4, entitled "An Etching Solution Filtration and Purification Device," discloses an etching solution filtration device for filtering the etching solution after production. This device sets up a filtration unit between the production tank and the filtration pump to filter the etching solution, thereby removing impurities. However, in actual filtration, it was found that if these impurities directly enter subsequent filtration stages, they will severely impact the filtration equipment. Existing filtration equipment for etching solution production typically uses only a single filter to filter the etching solution, lacking a pre-treatment cleaning function specifically for impurities such as packaging debris and large particles like sand. When packaging debris and large particles like sand enter the filter directly with the etching solution, they quickly clog the filter media, obstructing the filtration channels, significantly reducing filtration speed, and impacting production efficiency. Furthermore, large particles rub and collide with the internal structure of the filter during filtration, causing filter media damage and wear on the equipment's inner walls over time, drastically shortening the filter's lifespan and increasing equipment maintenance costs and replacement frequency. In addition, cleaning existing equipment often requires stopping the machine for disassembly, which is cumbersome and further affects production continuity. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to propose a filtration device for etching solution production, thereby solving the problem that existing filtration devices for etching solution production cannot promptly remove impurities such as packaging debris and large particles such as sand, thus affecting filtration efficiency.

[0004] The technical solution is a filtration device for etching solution production, including a production tank and a filter, a pipeline for connecting the production tank, and a filter tube connected between the pipeline and the filter. The filter tube has a "U" shaped structure and includes a left tube, a right tube, and a connecting tube located between the left and right tubes. A replaceable filter screen is provided on the left tube near the connecting tube. Openings for the filter screen to pass through are provided on the two opposite walls of the left tube. A sealing mechanism for sealing the openings is provided on the left tube. A storage compartment for unused filter screens is provided on the left tube. A collection compartment for used filter screens is also provided on the left tube. When packaging debris and other impurities and large particles such as sand in the etching solution adhere to the filter screen, the impurities will be removed along with the filter screen that is replaced at a set time. An openable and closable inspection port is provided in the middle of the connecting tube.

[0005] Preferably, the sealing mechanism includes slide rails located on the two opposite outer walls of the left tube, a baffle is provided at one end of the slide rail near the opening, a sealing plate is slidably connected inside the slide rail, a sealing block for sealing the opening is provided on the sealing plate, a sealing ring for limiting the position of the sealing block is provided on the sealing plate, and a spring is provided between the sealing block and the sealing plate. When the sealing block moves with the sealing plate to the opening position, the sealing block will partially enter the opening under the action of the spring.

[0006] Preferably, both the storage compartment and the receiving compartment are provided with long slots for the filter screen to enter and exit. Both the storage compartment and the receiving compartment are rotatably connected to a winding reel. The winding reel is provided with a rotating shaft. The two ends of the rotating shaft located in the storage compartment are provided with torsion springs. The rotating shaft located in the receiving compartment extends to the outside of the receiving compartment and is provided with a handle.

[0007] Preferably, a positioning rod is rotatably connected to the handle, and a positioning hole is provided on the outer wall of the storage compartment. There are multiple positioning holes, which are arranged symmetrically about the handle.

[0008] Preferably, the left tube has positioning plates on its two opposite inner walls for guiding the movement of the filter screen, and fixing plates on its two opposite inner walls, with pressing wheels on the fixing plates for pressing the filter screen onto the positioning plates.

[0009] The beneficial effects of this utility model are: by setting a filter tube with a "U" structure between the pipeline and the filter, and setting a replaceable filter screen in the left tube, the utility model can perform preliminary filtration of impurities such as packaging debris and large particles such as sand in the etching solution, and avoid packaging debris and large particles such as sand from directly entering the filter and causing the filter channel to be blocked. Because packaging debris and large particles like sand are pre-intercepted by the filter screen, these impurities are filtered out, preventing blockages in the filter channel and increasing the filtration speed of the etching solution, thereby improving production efficiency. Furthermore, filtering out large particles like sand prevents friction, collision, and clogging between these particles and the internal structure of the filter, reducing wear and damage, significantly extending the filter's lifespan, lowering maintenance costs, and reducing replacement frequency. An openable and closable inspection port is provided in the middle of the connecting pipe, allowing operators to easily inspect and clean the inside of the filter tube. By setting up storage compartments and collection compartments, along with a winding reel, rotating shaft, and torsion spring structure, the filter screen can be quickly replaced. After use, the filter screen, along with attached packaging debris and other impurities, as well as large particles such as sand, are wound up together in the collection compartment, achieving centralized processing of impurities and preventing impurities from scattering and causing secondary pollution. The design of the slide rail, sealing plate, sealing block, sealing ring and spring on the outer wall of the left tube makes the sealing block fit tightly against the opening under the action of the spring, so as to achieve a reliable seal of the opening and effectively prevent the etching solution from leaking. The positioning plate on the inner wall of the left tube works in conjunction with the extrusion roller to guide and extrude the filter screen, ensuring that the filter screen always maintains a close fit with the inner wall of the left tube during installation, use and replacement. This prevents the filter screen from shifting or loosening, which would affect the filtration effect and improve the stability and reliability of the filtration process. Attached Figure Description

[0010] Figure 1 This is a structural diagram of the filtration equipment for etching solution production according to this utility model; Figure 2 This is an enlarged view of section A of the structural diagram of the filtration equipment used in the production of etching solution according to this utility model; Figure 3 This is a front view of the filtration equipment for etching solution production according to this utility model.

[0011] Attached reference numerals: 1 Filter, 2 Filter tube, 3 Left tube, 4 Right tube, 5 Connecting tube, 6 Filter screen, 7 Opening, 8 Storage compartment, 9 Receiving compartment, 10 Inspection port, 11 Slide rail, 12 Baffle, 13 Sealing plate, 14 Sealing block, 15 Sealing ring, 16 Long groove, 17 Rewind reel, 18 Rotary shaft, 19 Handle, 20 Positioning rod, 21 Positioning hole, 22 Positioning plate, 23 Fixing plate, 24 Extrusion wheel. Detailed Implementation

[0012] The technical solutions provided by the present invention will now be described in more detail with reference to the accompanying drawings. The descriptions of exemplary embodiments are merely illustrative and are in no way intended to limit this disclosure or its application or use. This disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of this disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0013] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0014] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0015] The dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Common structural elements or elements of the same kind are given the same reference numerals in the various drawings, and repeated descriptions of them are omitted where appropriate.

[0016] According to the appendix Figure 1 and 2As shown, a filtration device for etching solution production includes a production tank and a filter 1. A pipeline connects the production tank, and a filter tube 2 connects the pipeline to the filter 1. The filter tube 2 has a U-shaped structure and includes a left tube 3, a right tube 4, and a connecting pipe 5 located between the left and right tubes 3 and 4. The left tube 3 has a rectangular cross-section. A replaceable filter screen 6 is installed on the left tube 3 near the connecting pipe 5. The filter screen 6 is prior art. Openings 7 for the filter screen 6 to pass through are provided on two opposite walls of the left tube 3. A sealing mechanism for sealing the openings 7 is provided on the left tube 3. The sealing mechanism includes slide rails 11 located on two opposite outer walls of the left tube 3. Each slide rail 11 includes two identical and oppositely arranged sliding plates, which are bolted together along two adjacent edges of the left tube 3. A baffle 12 is screwed to one end of the slide rail 11 near the opening 7. A sealing plate 13 is slidably connected inside the slide rail 11. Both slide plates are provided with tracks for the movement of the sealing plate 13. A push bar is screwed to one end of the sealing plate 13, and moving the push bar can drive the sealing plate 13 to move along the track. Multiple fixing grooves are provided inside the track and are evenly spaced along the length of the track. A fixing post that engages with the fixing groove is engaged on the sealing plate 13. When the fixing post is placed in the fixing groove, the position of the sealing plate 13 and the slide rail 11 is fixed. A sealing block 14 for sealing the opening 7 is connected to the sealing plate 13 via a spring. A sealing ring 15 for limiting the position of the sealing block 14 is screwed to the sealing plate 13. When the sealing block 14 moves with the sealing plate 13 to the position of the opening 7, the sealing block 14 will partially enter the opening 7 under the action of the spring. A storage compartment 8 for holding unused filter screens 6 is screwed onto a slide rail 11 on one side wall of the left tube 3. A collection compartment 9 for holding used filter screens 6 is screwed onto a slide rail 11 on the other side wall of the left tube 3. Both storage compartments 8 and 9 are existing technologies. Both storage compartments 8 and 9 are provided with elongated slots 16 for the filter screens 6 to enter and exit. Both storage compartments 8 and 9 are rotatably connected to a winding reel 17 for winding and storing the filter screens 6. The winding reel 17 is existing technology. A rotating shaft 18 is keyed into the winding reel 17. Torsion springs are provided at both ends of the rotating shaft 18 located in the storage compartment 8. The torsion springs are existing technology and are used to ensure that the filter screens 6 are in a taut state. The rotating shaft 18 located in the collection compartment 9 extends to the outside of the collection compartment 9 and is provided with a handle 19 that can drive the rotating shaft 18 to rotate. When impurities such as packaging debris and large particles such as sand in the etching solution adhere to the filter screens 6, the impurities will be removed along with the filter screens 6 that are replaced according to the set time. An openable and closable inspection port 10 is provided in the middle of the connecting pipe 5. Positioning plates 22 for guiding the movement of the filter screen 6 are provided on the two opposite inner walls of the left pipe 3. Fixing plates 23 are provided on the two opposite inner walls of the left pipe 3. Pressing rollers 24 for pressing the filter screen 6 onto the positioning plates 22 are provided on the fixing plates 23. There are multiple pressing rollers 24, which are evenly spaced along the length of the fixing plates 23. Each pressing roller 24 includes a bracket, and a wheel body is rotatably connected to the bracket. The bracket and the fixing plates 23 are connected by a compression spring.

[0017] In one embodiment, according to the accompanying drawings... Figure 3 As shown, a positioning rod 20 is rotatably connected to the handle 19. The positioning rod 20 has an "L" shape, and the end of the positioning rod 20 away from the handle 19 has a hemispherical structure. The outer wall of the storage compartment 9 is provided with positioning holes 21 that cooperate with the positioning rod 20. There are multiple positioning holes 21, which are arranged symmetrically about the handle 19.

[0018] The implementation principle of the filtration device for etching solution production according to this application is as follows: The production system is started, and the etching solution in the production tank is transported to the filter tube 2 through pipelines. Since the filter tube 2 has a "U"-shaped structure, the etching solution needs to pass through the filter screen 6 when flowing in the left tube 3. The filter screen 6 intercepts impurities such as packaging debris and large particles such as sand in the etching solution, achieving preliminary separation of these impurities from the etching solution. The filter screen 6 is replaced according to the time intervals set in the production process. During replacement, the sealing plate 13 is moved, and the sealing block 14 is removed from the opening 7. The handle 19 on the outside of the storage compartment 9 is rotated, causing the winding reel 17 inside the storage compartment 9 to rotate, winding up the used filter screen 6. Simultaneously, the rotating shaft 18 inside the storage compartment 8 rotates synchronously under the elastic force of the torsion spring, releasing the new filter screen 6. During winding and releasing, the filter screen 6 moves smoothly along the positioning plate 22, and the compression wheel 24 maintains its compression positioning on the filter screen 6. The used filter screen 6 is wound around the winding reel 17 of the storage compartment 9, and packaging debris and large particles such as sand attached to its surface are collected along with the filter screen 6, achieving centralized cleaning of impurities. After replacement, the positioning rod 20 on the handle 19 is rotated to insert into the corresponding positioning hole 21 on the outer wall of the storage compartment 9, fixing the winding reel 17 and preventing the filter screen 6 from loosening. The sealing plate 13 is pushed, placing the sealing block 14 into the opening 7 to achieve a seal.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filtration device for producing etching solution, comprising a production tank and a filter (1), and a pipeline for connecting the production tank, characterized in that, A filter tube (2) is connected between the pipeline and the filter (1). The filter tube (2) has a "U" shaped structure. The filter tube (2) includes a left tube (3), a right tube (4) and a connecting tube (5) located between the left tube (3) and the right tube (4). A replaceable filter screen (6) is provided on the left tube (3) near the connecting tube (5). An opening (7) for the filter screen (6) to pass through is provided on the two opposite walls of the left tube (3). A sealing mechanism for sealing the opening (7) is provided on the left tube (3). A storage compartment (8) for placing unused filter screens (6) is provided on the left tube (3). A collection compartment (9) for placing used filter screens (6) is also provided on the left tube (3). When impurities in the etching solution adhere to the filter screen (6), the impurities will be removed along with the filter screen (6) that is replaced according to the set time. An openable and closable inspection port (10) is provided in the middle of the connecting tube (5).

2. The filtration equipment for producing etching solution according to claim 1, characterized in that, The sealing mechanism includes slide rails (11) located on the two opposite outer walls of the left tube (3). A baffle (12) is provided at one end of the slide rail (11) near the opening (7). A sealing plate (13) is slidably connected inside the slide rail (11). A sealing block (14) for sealing the opening (7) is provided on the sealing plate (13). A sealing ring (15) for limiting the position of the sealing block (14) is provided on the sealing plate (13). A spring is provided between the sealing block (14) and the sealing plate (13). When the sealing block (14) moves to the position of the opening (7) with the sealing plate (13), the sealing block (14) will partially enter the opening (7) under the action of the spring.

3. The filtration equipment for producing etching solution according to claim 1, characterized in that, Both the storage compartment (8) and the receiving compartment (9) are provided with long slots (16) for the filter screen (6) to enter and exit. Both the storage compartment (8) and the receiving compartment (9) are rotatably connected to a winding reel (17). A rotating shaft (18) is provided in the winding reel (17). Torsion springs are provided at both ends of the rotating shaft (18) located in the storage compartment (8). The rotating shaft (18) located in the receiving compartment (9) extends to the outside of the receiving compartment (9) and is provided with a handle (19).

4. The filtration equipment for producing etching solution according to claim 3, characterized in that, A positioning rod (20) is rotatably connected to the handle (19), and a positioning hole (21) is provided on the outer wall of the storage compartment (9). There are multiple positioning holes (21) and they are arranged symmetrically about the handle (19).

5. The filtration equipment for producing etching solution according to claim 1, characterized in that, The left tube (3) has a positioning plate (22) on its two opposite inner walls for guiding the movement of the filter screen (6). The left tube (3) has a fixing plate (23) on its two opposite inner walls. The fixing plate (23) has a pressing wheel (24) for pressing the filter screen (6) onto the positioning plate (22).

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