A molten solder circulating filtering and purifying device for a soldering furnace

Abstract

The present application relates to the technical fields of molten tin furnace purification equipment, and particularly relates to a molten tin furnace tin liquid circulating filtration and purification device, which comprises a base, the upper surface of the base is connected with supporting legs, and the upper surface of the supporting legs is connected with a supporting table. The molten tin furnace tin liquid circulating filtration and purification device is provided with a filtering mechanism and a vibrating mechanism. During use, the tin liquid is pumped into the filtering bin by the tin pump, and then flows along the inclined plate to the three groups of wavy filter screens for multi-stage filtration. The inclined plate buffers the tin residue, and reduces the impact force of the tin residue directly impacting the filter screen, so that the problem of residue jamming can be effectively solved.

Description

Technical Field

[0001] This invention relates to the technical field of tin furnace purification equipment, and in particular to a tin furnace molten metal circulation filtration and purification device. Background Technology

[0002] The molten solder circulation and filtration purification device for solder furnaces is a specialized piece of equipment integrated into the solder furnace for online circulation, multi-stage filtration, and slag removal purification of high-temperature molten solder. Its core function is to continuously remove oxide slag, metallic impurities, and flux residues from the molten solder, stabilize the composition and temperature of the molten solder, reduce solder loss, improve welding quality, and extend the service life of the molten solder. It is widely used in industries such as electronics manufacturing, semiconductor packaging, PCB dismantling and recycling, photovoltaic soldering, and hardware welding. It mainly consists of a solder furnace body, a circulation pump, and high-temperature resistant filter components. In common molten solder circulation and filtration purification devices, the filter screens in the external filter modules are mostly installed vertically or horizontally. Horizontally installed filters require machine shutdown for disassembly and replacement, affecting working hours. Vertically installed filters are directly impacted by solder slag, making them prone to clogging. In addition, there is the problem that it is not possible to visually observe when the filter screen needs to be replaced when it is in a sealed state.

[0003] To address the aforementioned issues, a search revealed a patent with publication number CN103627913A disclosing a method and equipment for tin dross purification and recycling. The patent states that "existing mechanical tin dross recycling machines 10 also suffer from another significant problem: the asynchronous movement of their twin-screw drive chains. This is because the existing mechanical tin dross recycling machine 10 uses a motor 17 to drive two chains 171 to rotate the aforementioned two screws 13. Therefore, when the wear of the two chains 171 is unequal, their movement speeds become inconsistent, causing the chains 171 to vibrate during movement. This results in differences in the size of the tin dross particles during pressing and separation, or jamming and downtime for maintenance, leading to insufficient pure tin liquid production." Therefore, the improvement direction of this invention is... How can we design an innovative method for tin dross purification and recycling that not only meets the needs of rapid purification and recycling of tin dross, but also uses a chemical method by adding a reducing agent to reduce the tin dross liquid into pure reduced tin liquid? This would avoid the problem of existing mechanical tin dross recycling machines using physical methods of pressing and scraping to recycle tin dross, which leads to the machine components being stuck by large tin particles and unable to operate. Although the method uses a filter plate at the bottom of the inner cylindrical tank and a low-level overflow hole to achieve efficient purification of tin dross through chemical reduction and density difference, avoiding mechanical jamming and improving the purity of the tin liquid, the filter plate is still horizontally installed. Disassembly and replacement require machine shutdown, and it is easily clogged by the impact of tin dross. In a sealed environment, it is not possible to visually determine the timing of clogging, which still affects working hours and makes maintenance inconvenient.

[0004] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide a molten solder circulation filtration and purification device for molten solder furnaces, in order to solve the problems mentioned in the background art. In the process of use, the filter screens in the external filter module of the existing molten solder circulation filtration and purification devices are mostly installed vertically or horizontally. When the filter screen is installed horizontally, it is necessary to stop the machine for disassembly and replacement, which affects the working time. The filter screen is directly impacted by the solder dross and is very easy to clog. In addition, there is also the problem that it is not possible to visually observe when the filter screen needs to be replaced when it is sealed.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a molten solder circulation filtration and purification device for a solder melting furnace, comprising a base, a filtration mechanism, and a vibration mechanism. The upper surface of the base is connected to a support leg, the upper surface of the support leg is connected to a support platform, and a filter mechanism is provided above the support platform. The filtration mechanism includes a filter chamber, an inclined plate is connected to one side surface of the filter chamber, a filter screen is provided on the upper surface of the inclined plate, and a sealing cover is hinged to one side of the filter chamber. A vibration mechanism is provided on one side of the support leg; The vibration mechanism includes a support plate, a first bracket is connected to the upper surface of the support plate, and a motor is mounted on the upper surface of the first bracket.

[0007] Preferably, the inner wall side of the filter chamber is connected to a grooved rod, the inner ring surface of the grooved rod is connected to a vertical rod, and one side surface of the vertical rod is connected to one side surface of the filter screen.

[0008] Preferably, the filter screen is wavy, the filter screen is provided in three sets, one side surface of the filter screen is connected to a side pocket, and the lower side surface of the side pocket is engaged with a groove on the upper side surface of the inclined plate.

[0009] Preferably, a sealing ring is connected to the upper surface of the filter chamber, the upper half of the outer ring surface of the sealing ring is connected to the lower surface of the sealing cover, and an elastic pressing and fixing device is provided on one side surface of the filter chamber.

[0010] Preferably, a display mechanism is provided above the sealing cover. The display mechanism includes a vertical round rod, and the outer ring surface of the vertical round rod is slidably connected to the inner ring surface of the vertical through hole of the sealing cover.

[0011] Preferably, a float is connected to the lower surface of the vertical rod, an indicator plate is connected to the upper surface of the vertical rod, a first spring is sleeved on the outer ring of the vertical rod, the lower surface of the first spring is connected to the upper surface of the sealing cover, the upper surface of the first spring abuts against the lower surface of the indicator plate, and a scale rod is connected to the upper surface of the sealing cover.

[0012] Preferably, an eccentric wheel is fitted on the outer ring surface of the motor output end, a column is connected to the upper surface of the support plate, and a crossbar is fitted on the outer ring surface of the column.

[0013] Preferably, a sleeve post is connected to the upper surface of the crossbar, a connecting post is connected to the inner ring surface of the sleeve post, a collision ball is connected to the upper surface of the connecting post, a second spring is connected to the lower surface of the connecting post, the lower surface of the second spring is connected to the bottom surface of the inner ring of the sleeve post, a third spring is sleeved on the outer ring of the column, the upper surface of the third spring is connected to the lower surface of the crossbar, and the lower surface of the third spring is connected to the upper surface of the support plate.

[0014] Preferably, a solder pot is connected to the upper surface of the base, a second bracket is connected to the upper surface of the base, and a solder pump is installed on the upper surface of the second bracket.

[0015] Preferably, the slag outlet of the tin furnace is connected to a first connecting pipe, the other end of which is connected to the inlet of the tin pump; the tin return outlet of the tin furnace is connected to a second connecting pipe, the other end of which is connected to the outlet of the filter chamber; and the outlet of the tin pump is connected to a third connecting pipe, the other end of which is connected to the inlet of the filter chamber.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This molten tin circulating filtration and purification device for a solder melting furnace, through the setting of a filtration mechanism and a vibration mechanism, allows molten tin to be pumped into the filter chamber by a tin pump during operation. It then flows along an inclined plate to three sets of corrugated screens for multi-stage filtration. The inclined plate buffers the tin dross, reducing the force of the dross directly impacting the screens and effectively reducing the problem of dross jamming. The motor drives the eccentric wheel to rotate, causing the crossbar, sleeve column, and collision ball to reciprocate up and down to strike the filter chamber, causing the filter chamber to vibrate. This not only prevents dross from accumulating but also further avoids dross from getting stuck on the screens. At the same time, the corrugated screens and side pockets can collect dross. The slotted installation method of the slotted rods and vertical rods allows for quick disassembly and replacement without stopping the machine, effectively improving filtration efficiency and maintenance convenience. 2. This molten solder circulation filtration and purification device for a solder melting furnace, through the setting of the display mechanism, allows for intuitive and real-time observation of changes in the molten solder level during use. When the filter screen becomes clogged, the molten solder level in the filter chamber rises. The float moves the vertical rod and indicator plate upwards with the rising liquid level, and, in conjunction with the scale rod, allows for accurate judgment of the filter screen clogging status. This solves the problem of not being able to monitor the filter screen's usage under sealed conditions, ensuring stable operation of the molten solder circulation filtration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the interaction between the filter chamber and the sealing cap of the present invention; Figure 3 This is a schematic diagram of the structure in which the base and support legs of the present invention cooperate with each other; Figure 4 This is a schematic diagram of the interoperation structure of the tin furnace and the second connecting pipe of the present invention; Figure 5 This is a schematic diagram of the structure in which the vertical rod and the filter screen cooperate with each other in this invention; Figure 6 This is a schematic diagram of the cooperation structure between the sealing cap and the pressing spring retainer of the present invention; Figure 7 This is a schematic diagram of the structure in which the vertical rod and the indicator plate of the present invention cooperate with each other; Figure 8 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Base; 2. Support leg; 3. Support platform; 4. Filtering mechanism; 401. Filter chamber; 402. Inclined plate; 403. Groove rod; 404. Vertical square rod; 405. Filter screen; 406. Side pocket; 407. Sealing ring; 408. Sealing cover; 409. Elastic pressing retainer; 5. Display mechanism; 501. Vertical round rod; 502. Float; 503. Indicator plate; 504. First spring; 505. 6. Scale rod; 6. Vibration mechanism; 601. Support plate; 602. First bracket; 603. Motor; 604. Eccentric wheel; 605. Column; 606. Crossbar; 607. Sleeve column; 608. Connecting column; 609. Collision ball; 610. Second spring; 611. Third spring; 7. Solder furnace; 8. Second bracket; 9. Solder pump; 10. First connecting pipe; 11. Second connecting pipe; 12. Third connecting pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-8 The present invention provides a technical solution: a molten solder circulation filtration and purification device for a solder furnace, comprising a base 1, a filtration mechanism 4, and a vibration mechanism 6. A support leg 2 is connected to the upper surface of the base 1, a support platform 3 is connected to the upper surface of the support leg 2, and a filter mechanism 4 is provided above the support platform 3. The filtration mechanism 4 includes a filter chamber 401, an inclined plate 402 is connected to one side surface of the filter chamber 401, a filter screen 405 is provided on the upper surface of the inclined plate 402, and a sealing cover 408 is hinged to one side of the filter chamber 401. A vibration mechanism 6 is provided on one side of the support leg 2; The vibration mechanism 6 includes a support plate 601, a first bracket 602 connected to the upper surface of the support plate 601, and a motor 603 mounted on the upper surface of the first bracket 602.

[0021] Furthermore, a grooved rod 403 is connected to the inner wall side of the filter chamber 401, and a vertical rod 404 is connected to the inner ring surface of the grooved rod 403. One side surface of the vertical rod 404 is connected to one side surface of the filter screen 405. Through the arrangement of the grooved rod 403 and the vertical rod 404, the filter screen 405 can be quickly installed and disassembled during use. The grooved rod 403 is fixed to the inner wall of the filter chamber 401, providing a sliding mounting track for the vertical rod 404. The vertical rod 404 is connected to the filter screen 405, and the filter screen 405 can be installed and disassembled by sliding along the grooved rod 403 without stopping the machine to disassemble the main body of the equipment, which facilitates the maintenance and replacement of the filter screen 405.

[0022] Furthermore, the filter screen 405 is wavy and has three sets. One side surface of the filter screen 405 is connected to a side pocket 406. The lower surface of the side pocket 406 engages with the groove on the upper surface of the inclined plate 402. Through the arrangement of the filter screen 405 and the side pocket 406, multi-stage filtration of molten solder and collection and buffering of molten solder dross can be achieved during use. The wavy filter screen 405 increases the filtration area and improves the filtration efficiency. The three sets of filter screens 405 achieve stepped filtration. The side pocket 406 and the groove of the inclined plate 402 can collect the filtered molten solder dross in the pocket, preventing molten solder dross from flowing back or clogging the filter holes. The inclined structure of the inclined plate 402 can also slow down the flow rate of molten solder and reduce the direct impact of molten solder dross on the filter screen 405.

[0023] Furthermore, a sealing ring 407 is connected to the upper surface of the filter chamber 401. The upper half of the outer surface of the sealing ring 407 is connected to the lower surface of the sealing cover 408. A spring-loaded pressing fastener 409 is provided on one side surface of the filter chamber 401. Through the setting of the sealing ring 407 and the spring-loaded pressing fastener 409, the filter chamber 401 and the sealing cover 408 can be sealed and quickly locked during use. The sealing ring 407 is installed on the upper side of the filter chamber 401 to fill the gap between the sealing cover 408 and the filter chamber 401, preventing the leakage of molten solder and high-temperature gas. The spring-loaded pressing fastener 409 quickly fixes the sealing cover 408 through a pressing structure, which not only ensures the sealing effect, but also enables the sealing cover 408 to be opened quickly, facilitating internal maintenance.

[0024] Furthermore, a display mechanism 5 is provided above the sealing cover 408. The display mechanism 5 includes a vertical round rod 501. The outer surface of the vertical round rod 501 is slidably connected to the inner surface of the vertical through hole of the sealing cover 408. Through the setting of the vertical round rod 501, the linear transmission of liquid level changes can be realized during use. The vertical round rod 501 is slidably connected to the vertical through hole of the sealing cover 408, and the lower end is connected to the float 502, which moves up and down synchronously with the rise and fall of the molten tin in the filter chamber 401, transmitting the internal liquid level changes to the indicator structure above the sealing cover 408.

[0025] Furthermore, a float 502 is connected to the lower surface of the vertical rod 501, and an indicator plate 503 is connected to the upper surface of the vertical rod 501. A first spring 504 is sleeved on the outer ring of the vertical rod 501. The lower surface of the first spring 504 is connected to the upper surface of the sealing cover 408, and the upper surface of the first spring 504 abuts against the lower surface of the indicator plate 503. A scale rod 505 is connected to the upper surface of the sealing cover 408. Through the arrangement of the float 502, indicator plate 503, first spring 504, and scale rod 505, the filter screen 405 can be prevented from clogging during use. The system provides intuitive monitoring of the blockage status. As the molten solder level rises, the float 502 moves the vertical rod 501 and the indicator plate 503 upwards. When the filter screen 405 becomes clogged, causing the liquid level to rise, the position of the indicator plate 503 will display the corresponding value on the scale rod 505. By observing the position of the indicator plate 503, the degree of blockage of the filter screen 405 can be determined without opening the equipment. In addition, the first spring 504 provides vertical elasticity, which provides elastic support for the entire display structure when the molten solder has not risen, thereby improving the sensitivity of the overall mechanism and preventing the vertical rod 501 from sliding and becoming stuck in the vertical through hole of the sealing cover 408.

[0026] Furthermore, an eccentric wheel 604 is fitted onto the outer ring surface of the output end of the motor 603, and a column 605 is connected to the upper surface of the support plate 601. A crossbar 606 is fitted onto the outer ring surface of the column 605. Through the arrangement of the eccentric wheel 604 and the column 605, power transmission and guiding support can be provided for the vibration mechanism 6 during use. The eccentric wheel 604 is fitted onto the output end of the motor 603 and generates eccentric rotational motion as the motor 603 rotates, driving the crossbar 606 to move up and down reciprocally. The column 605 is fixed on the support plate 601, providing guidance for the up and down movement of the crossbar 606 and ensuring the stability of the movement trajectory.

[0027] Furthermore, a sleeve post 607 is connected to the upper surface of the crossbar 606, a connecting post 608 is connected to the inner surface of the sleeve post 607, a collision ball 609 is connected to the upper surface of the connecting post 608, and a second spring 610 is connected to the lower surface of the connecting post 608. The lower surface of the second spring 610 is connected to the bottom surface of the inner ring of the sleeve post 607. A third spring 611 is sleeved on the outer ring of the column 605. The upper surface of the third spring 611 is connected to the lower surface of the crossbar 606, and the lower surface of the third spring 611 is connected to the upper surface of the support plate 601. Through the crossbar 606, sleeve post 607, connecting post 608, and collision ball 609, a connection is established. The arrangement of the ball 609, the second spring 610, and the third spring 611 allows for intermittent tapping vibration of the filter chamber 401 during use. The crossbar 606 reciprocates up and down in conjunction with the eccentric wheel 604 and the third spring 611, driving the sleeve column 607 to move synchronously. The connecting column 608 inside the sleeve column 607 and the ball 609 intermittently tap the outer wall of the filter chamber 401 under the elastic force of the second spring 610, causing the filter chamber 401 to vibrate and preventing solder dross from accumulating and clogging the filter screen 405. The third spring 611 provides a reset buffer for the crossbar 606, reducing the operating noise and wear of the vibration mechanism 6.

[0028] Furthermore, a tin furnace 7 is connected to the upper surface of the base 1, and a second bracket 8 is connected to the upper surface of the base 1. A tin pump 9 is installed on the upper surface of the second bracket 8. Through the arrangement of the tin furnace 7, the second bracket 8, and the tin pump 9, the molten tin can be circulated and transported during use. The tin furnace 7 serves as a container for storing and using molten tin, the second bracket 8 provides installation support for the tin pump 9, and the tin pump 9 serves as a circulation power source, pumping the molten tin containing slag in the tin furnace 7 into the filter mechanism 4, and then sending the filtered and purified molten tin back to the tin furnace 7, forming a closed-loop circulation.

[0029] Furthermore, the slag outlet of the tin furnace 7 is connected to a first connecting pipe 10, the other end of which is connected to the inlet of the tin pump 9. The tin return outlet of the tin furnace 7 is connected to a second connecting pipe 11, the other end of which is connected to the outlet of the filter chamber 401. The outlet of the tin pump 9 is connected to a third connecting pipe 12, the other end of which is connected to the inlet of the filter chamber 401. The tin flow is achieved through the first connecting pipe 10, the second connecting pipe 11, and the third connecting pipe 12. The system is designed to facilitate the transfer of molten tin between the tin furnace 7 and the filter mechanism 4 during operation. The first connecting pipe 10 connects the slag outlet of the tin furnace 7 to the inlet of the tin pump 9, sending the slag-containing molten tin into the tin pump 9. The third connecting pipe 12 connects the outlet of the tin pump 9 to the inlet of the filter chamber 401, sending the slag-containing molten tin into the filter chamber 401 for filtration. The second connecting pipe 11 connects the outlet of the filter chamber 401 to the return tin outlet of the tin furnace 7, sending the purified molten tin back to the tin furnace 7, thus completing the entire cycle.

[0030] Working Principle: First, place the base 1 on a flat working surface, ensuring the support legs 2 firmly support the support platform 3 to guarantee the stability of the entire device during operation. Then, check the installation status of the filter mechanism 4, securely connect the vertical rod 404 to the filter screen 405, slide the vertical rod 404 into the groove 403 on the inner wall of the filter chamber 401, allowing the filter screen 405 to rest stably on the inclined plate 402. Simultaneously, tightly engage the side pocket 406 with the slot on the upper side of the inclined plate 402. After the three sets of wavy filter screens 405 are installed in sequence, cover with the sealing cover 408, ensuring the lower side of the sealing cover 408 fits tightly against the sealing ring 407 on the upper side of the filter chamber 401. Press the elastic retainer 409 to lock the sealing cover 408, ensuring a good seal in the filter chamber 401 and preventing leaks. If molten tin leaks, check the display mechanism 5 to ensure smooth sliding between the vertical rod 501 and the vertical through hole of the sealing cover 408, that the float 502 is securely connected, that the first spring 504 is in its natural extension / retraction state, and that the indicator plate 503 is aligned with the scale rod 505 to display the liquid level change correctly. Next, check the vibration mechanism 6, ensuring the support plate 601 is fixed to one side of the support leg 2, that the motor 603 on the first bracket 602 is securely installed, that the eccentric wheel 604 is fitted onto the output end of the motor 603 and is tightly connected, that the horizontal bar 606 on the column 605 slides smoothly, that the connecting column 608, the collision ball 609 inside the sleeve 607 cooperate well with the second spring 610, and that the third spring 611 is fitted onto the column 605 and securely connected at both ends. Finally, check the circulation system to ensure... The tin furnace 7 is fixed on the base 1, and the tin pump 9 on the second bracket 8 is stably installed. The first connecting pipe 10 connects the slag outlet of the tin furnace 7 to the inlet of the tin pump 9, the third connecting pipe 12 connects the outlet of the tin pump 9 to the inlet of the filter chamber 401, and the second connecting pipe 11 connects the outlet of the filter chamber 401 to the return tin outlet of the tin furnace 7. All pipes are tightly connected without leakage. After completing the preliminary inspection and debugging of the device, the motor 603 of the tin pump 9 and the vibration mechanism 6 is started. The tin pump 9 draws out the molten tin containing oxide slag, metal impurities and flux residue from the tin furnace 7 through the first connecting pipe 10, and transports it to the filter chamber 401 through the third connecting pipe 12. After entering the filter chamber 401, the molten tin flows slowly along the inclined plate 402. The inclined plate 402 slows down the flow rate of the molten tin and reduces the impact of tin slag on the filter screen. The molten solder undergoes a multi-stage filtration process, passing through three sets of wavy filters 405. The filters 405 intercept impurities in the molten solder, which are collected in the side pockets 406. The filtered pure molten solder flows back into the solder furnace 7 through the outlet of the filter chamber 401 and the second connecting pipe 11, forming a closed-loop molten solder circulation filtration system. Simultaneously, the motor 603 drives the eccentric wheel 604 to rotate, which in turn drives the crossbar 606 to reciprocate up and down along the column 605. The third spring 611 provides a reset buffer for the crossbar 606. The crossbar 606 drives the sleeve column 607 to move up and down synchronously. Under the elastic force of the second spring 610, the connecting column 608 inside the sleeve column 607 drives the collision ball 609 to intermittently strike the outer wall of the filter chamber 401, causing the filter chamber 401 to vibrate.To prevent solder dross from accumulating on the inclined plate 402 and filter screen 405 and clogging the filter holes, during the filtration process, if the filter screen 405 becomes clogged, the solder liquid level in the filter chamber 401 will gradually rise. The float 502 will float upwards with the rising liquid level, causing the vertical rod 501 to slide upwards along the vertical through hole of the sealing cover 408. The vertical rod 501 will also cause the indicator plate 503 to move upwards. By observing the position of the indicator plate 503 on the scale rod 505, the operator can visually determine the degree of clogging of the filter screen 405. When the clogging is severe and replacement is necessary, press the elastic retainer 409 to open the sealing cover 408, and pull out the vertical rod 404 along the groove rod 403. This allows for quick disassembly and replacement of the filter screen 405 and side pocket 406 without stopping the machine and disassembling the entire device, improving work efficiency. The motor 603 is model Y2-80M1-4, and the solder pump 9 is model WRT-50T.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molten solder circulation filtration and purification device for a solder furnace, comprising a base (1), a filtration mechanism (4), and a vibration mechanism (6), characterized in that: The upper surface of the base (1) is connected to a support leg (2), the upper surface of the support leg (2) is connected to a support platform (3), and a filter mechanism (4) is provided above the support platform (3). The filtration mechanism (4) includes a filter chamber (401), an inclined plate (402) is connected to one side surface of the filter chamber (401), a filter screen (405) is provided on the upper surface of the inclined plate (402), and a sealing cover (408) is hinged to one side of the filter chamber (401). A vibration mechanism (6) is provided on one side of the support leg (2); The vibration mechanism (6) includes a support plate (601), the upper surface of which is connected to a first bracket (602), and the upper surface of the first bracket (602) is equipped with a motor (603).

2. The molten tin circulation filtration and purification device for a tin furnace according to claim 1, characterized in that: The inner wall side of the filter chamber (401) is connected to a grooved rod (403), and the inner ring surface of the grooved rod (403) is connected to a vertical rod (404). One side surface of the vertical rod (404) is connected to one side surface of the filter screen (405).

3. The molten tin circulation filtration and purification device for a tin furnace according to claim 1, characterized in that: The filter screen (405) is wavy and has three sets. A side pocket (406) is connected to one side surface of the filter screen (405). The lower surface of the side pocket (406) is engaged with the groove on the upper surface of the inclined plate (402).

4. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 1, characterized in that: A sealing ring (407) is connected to the upper surface of the filter chamber (401). The upper half of the outer ring surface of the sealing ring (407) is connected to the lower surface of the sealing cover (408). An elastic pressing and fixing device (409) is provided on one side surface of the filter chamber (401).

5. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 1, characterized in that: A display mechanism (5) is provided above the sealing cover (408). The display mechanism (5) includes a vertical rod (501). The outer ring surface of the vertical rod (501) is slidably connected to the inner ring surface of the vertical through hole of the sealing cover (408).

6. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 5, characterized in that: A float (502) is connected to the lower surface of the vertical rod (501), and an indicator plate (503) is connected to the upper surface of the vertical rod (501). A first spring (504) is sleeved on the outer ring of the vertical rod (501). The lower surface of the first spring (504) is connected to the upper surface of the sealing cover (408), and the upper surface of the first spring (504) abuts against the lower surface of the indicator plate (503). A scale rod (505) is connected to the upper surface of the sealing cover (408).

7. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 1, characterized in that: An eccentric wheel (604) is fitted on the outer ring surface of the output end of the motor (603), and a column (605) is connected to the upper surface of the support plate (601). A crossbar (606) is fitted on the outer ring surface of the column (605).

8. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 7, characterized in that: The upper surface of the crossbar (606) is connected to a sleeve post (607), the inner surface of the sleeve post (607) is connected to a connecting post (608), the upper surface of the connecting post (608) is connected to a collision ball (609), the lower surface of the connecting post (608) is connected to a second spring (610), the lower surface of the second spring (610) is connected to the bottom surface of the inner ring of the sleeve post (607), the outer ring of the column (605) is fitted with a third spring (611), the upper surface of the third spring (611) is connected to the lower surface of the crossbar (606), and the lower surface of the third spring (611) is connected to the upper surface of the support plate (601).

9. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 1, characterized in that: A tin furnace (7) is connected to the upper surface of the base (1), and a second bracket (8) is connected to the upper surface of the base (1). A tin pump (9) is installed on the upper surface of the second bracket (8).

10. The molten tin circulation filtration and purification device for a tin melting furnace according to claim 9, characterized in that: The slag outlet of the tin furnace (7) is connected to a first connecting pipe (10), the other end of which is connected to the inlet of the tin pump (9). The tin return outlet of the tin furnace (7) is connected to a second connecting pipe (11), the other end of which is connected to the outlet of the filter chamber (401). The outlet of the tin pump (9) is connected to a third connecting pipe (12), the other end of which is connected to the inlet of the filter chamber (401).

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