Filtering device for production of sodium 3, 3 '-dithiodipropane sulfonate

Abstract

The utility model relates to the technical field of production of sodium 3, 3 '-dithiodipropane sulfonate, in particular to a filtering device for production of sodium 3, 3'-dithiodipropane sulfonate, which is characterized in that a stirring component is mounted at the top of a containing frame, a screening component is mounted on the inner wall of the containing frame, and a circulating component is mounted on the side surface of the containing frame; a second screen in the screening assembly is connected with the first screen and is driven by the first screen, and the second screen is matched with the reciprocating assembly to drive the first screen to move in a reciprocating manner, so that unqualified sodium 3, 3 '-dithiodipropane sulfonate accumulated on the screens can be automatically cleaned in the filtering process; the condition that qualified products cannot fall off due to excessive accumulation of unqualified products is avoided, so that the continuity and the high efficiency of filtering are ensured, reactants which do not pass through the screen mesh can be circularly treated by arranging the circulating assembly, the filtering effect is further improved, and through circular treatment, the product quality is improved. And more opportunities are provided for reactants to pass through the screen, so that the waste is reduced, and meanwhile, the stability and the reliability of the filtering process are also ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to polydithiobis propane sulfonic acid sodium salt production technical field, concretely is a kind of polydithiobis propane sulfonic acid sodium salt production filter device. BACKGROUND

[0002] It is known that polydithiobis propane sulfonic acid sodium is a chemical substance, molecular formula is C6H12O6S4Na2, white or light yellow powder, easy to absorb moisture, strong water-soluble, slightly soluble in alcohol, store in cool dry place, SPS is used for acidic copper plating brightener, can obtain decorative and functional coating, SPS can be used in combination with typical copper plating formula, such as non-ionic surfactant, polyamine and other mercapto compounds, also can be used in combination with dye, if again combine DPS and EXP2887 together, better effect will be obtained.

[0003] The existing polydithiobis propane sulfonic acid sodium salt production filter device is generally used in combination with sieve screen for filtering when filtering polydithiobis propane sulfonic acid sodium salt, and unqualified polydithiobis propane sulfonic acid sodium salt can be retained on the top of sieve screen, although polydithiobis propane sulfonic acid sodium salt can be screened, but once unqualified polydithiobis propane sulfonic acid sodium salt is accumulated too much on sieve screen, it can cause qualified polydithiobis propane sulfonic acid sodium salt to be accumulated on sieve screen and not to fall, at this time, workers need to manually clean sieve screen, which not only wastes workers' time, but also affects workers' efficiency, in order to solve the above problems, therefore, a polydithiobis propane sulfonic acid sodium salt production filter device is needed. SUMMARY

[0004] The utility model provides a kind of polydithiobis propane sulfonic acid sodium salt production filter device in view of the technical problem existing in prior art.

[0005] The utility model discloses a technical scheme that solves above-mentioned technical problem is as follows: A kind of filtering device for polydithiodipropyl sulfone sodium salt production, including containing frame, further including sieve bucket, input, screening component and circulation component, the sieve bucket is fixedly connected on the top inner wall of containing frame, each the input is respectively set in the top two sides of containing frame, and each the input is communicated with the sieve bucket, the screening component is installed on the inner wall of containing frame, for screening reactant, the screening component includes first runner, first sliding block, second runner, second sliding block, first screen, connecting block, second screen and reciprocating component, the first runner is set on the inner wall of containing frame, the first sliding block is slidably connected on the inner wall of the first runner, the second runner is set on the inner wall of containing frame, the second sliding block is slidably connected on the inner wall of the second runner, the first screen is fixedly connected between the first sliding block and the second sliding block, each the connecting block is fixedly connected at the bottom of first screen both ends, the second screen is slidably connected on the inner wall of containing frame, and the second screen is fixedly connected with the connecting block, the reciprocating component is installed on the inner wall of containing frame, for driving the reciprocating movement of first screen.

[0006] Further, the stirring assembly is installed on the top of the containing frame for stirring the reactant, the stirring assembly includes a rotating shaft, a four-leaf plate, a rubber plate, a connecting plate, a reinforcing plate and a first motor, the rotating shaft is rotatably connected to the sieve bucket, the four-leaf plate is fixedly connected to the rotating shaft, and the four-leaf plate is slidably connected to the top of the sieve bucket, each rubber plate is fixedly connected around the four-leaf plate, and each rubber plate is in contact with the inner wall of the sieve bucket, each connecting plate is fixedly connected to the rotating shaft, and each connecting plate is fixedly connected to the corresponding rubber plate, each reinforcing plate is fixedly connected to the rotating shaft, and each reinforcing plate is fixedly connected to the corresponding rubber plate, the first motor is installed on the inner wall of the containing frame, and the output shaft of the first motor is fixedly connected to the rotating shaft, the circulation component is installed on the side of the containing frame for circulating treatment of the reactant.

[0007] Further, the circulation component includes a receiving frame, a conveying column, an auger and a conveying plate, the receiving frame is fixedly connected to the side of the containing frame, the conveying column is fixedly connected to the receiving frame, the auger is installed on the inner wall of the conveying column, and the conveying plate is fixedly connected to the top of the conveying column.

[0008] Further, the reciprocating assembly comprises a mounting plate, a placing groove, a second motor, a rotating column, a first rotating rod, a second rotating rod and a connecting assembly, the mounting plate is fixedly connected to the inner wall of the containing frame, the placing groove is arranged on the containing frame, the second motor is mounted on the inner wall of the placing groove, the rotating column is rotatably connected to the mounting plate, and the rotating column is fixedly connected to the output shaft of the second motor, the first rotating rod is rotatably connected to the rotating column, the second rotating rod is rotatably connected to the first rotating rod, and the connecting assembly is mounted on the second rotating rod and is used for linking the second sliding block and the second rotating rod.

[0009] Based on the foregoing scheme, the connecting assembly comprises a moving plate, a connecting column and a square plate, the moving plate is slidably connected to the mounting plate, and the moving plate is rotatably connected to the second rotating rod, the connecting column is fixedly connected to the moving plate, and the square plate is fixedly connected to the second sliding block and the connecting column.

[0010] Beneficial effects:

[0011] The polydithiasulfopropane sodium salt production filtering device, the first screen in the screening assembly slides in the first sliding groove through the first sliding block, the second screen is connected with the first screen and is driven by the first screen, and the first screen is driven to reciprocate in cooperation with the reciprocating assembly. This design can automatically clean the unqualified polydithiasulfopropane sodium salt accumulated on the screen during the filtering process, avoid the situation that too much unqualified product causes qualified product to be unable to fall, thereby ensuring the continuity and efficiency of the filtering process. The device is provided with the first screen and the second screen, forming a multi-stage screening structure. This structure can more finely screen the polydithiasulfopropane sodium salt, improve the precision and quality of the filtering process, and different aperture screens can be customized according to product requirements to ensure that only qualified products can pass through, thereby improving the purity of the product. The setting of the circulating assembly can recycle the reactants that do not pass through the screen, further improving the filtering effect. Through the recycling process, the reactants have more opportunities to pass through the screen, reducing waste and ensuring the stability and reliability of the filtering process. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a side view structure schematic diagram of the utility model;

[0013] Figure 2 It is a structure schematic diagram of the receiving frame of the utility model;

[0014] Figure 3 It is a structure schematic diagram of the rotating shaft of the utility model;

[0015] Figure 4The utility model discloses Figure 2 Partial enlarged structure schematic diagram at A in the middle.

[0016] In the drawings, the component list represented by each sign is as follows:

[0017] 1, holds frame;2, sieve bucket;3, rotation axis;4, four leaf plate;5, rubber plate;6, connecting plate;7, reinforcing plate;8, first motor;9, first sliding block;10, second sliding block;11, first screen;12, connecting block;13, second screen;14, receiving frame;15, conveying column;16, auger;17, conveying plate;18, mounting plate;19, second motor;20, rotating column;21, first rotating rod;22, second rotating rod;23, moving plate;24, connecting column;25, square plate;26, input port;27, placing groove. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0019] In the description of the utility model, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more said features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0020] In the description of the utility model, the term "for example" is used to indicate "as an example, illustration or explanation". Any embodiment described as "for example" in the utility model is not necessarily interpreted as more preferred or more advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the utility model. In the following description, details are listed for the purpose of explanation. It should be understood that those skilled in the art can realize the utility model without using these specific details. In other examples, well-known structures and processes will not be described in detail to avoid unnecessary details making the description of the utility model obscure. Therefore, the utility model is not intended to be limited to the shown embodiments, but is consistent with the widest scope of principles and characteristics disclosed in the utility model.

[0021] Reference Figures 1 to 4The utility model provides a kind of filtering device for polydithiobispropane sulfonic acid sodium salt production, including containing frame 1, further including sieve bucket 2, input 26, stirring assembly, screening assembly and circulation component, sieve bucket 2 is fixedly connected on the top inner wall of containing frame 1, each input 26 is respectively opened in the top two sides of containing frame 1, and each input 26 is communicated with sieve bucket 2, stirring assembly is installed in the top of containing frame 1, for stirring reactant, stirring assembly includes rotating shaft 3, four leaf plate 4, rubber plate 5, connecting plate 6, reinforcing plate 7 and first motor 8, rotating shaft 3 is rotatably connected on sieve bucket, four leaf plate 4 is fixedly connected on rotating shaft 3, and four leaf plate 4 is slidably connected with the top of sieve bucket 2, each rubber plate 5 is respectively fixedly connected on four leaf plate 4 four around, and each rubber plate 5 is contacted with the inner wall of sieve bucket 2, each connecting plate 6 is fixedly connected on rotating shaft 3, and each connecting plate 6 is respectively fixedly connected with corresponding rubber plate 5, each reinforcing plate 7 is fixedly connected on rotating shaft 3, and each reinforcing plate 7 is respectively fixedly connected with corresponding rubber plate 5, first motor 8 is installed on the inner wall of containing frame 1, and the output shaft of first motor 8 is fixedly connected with rotating shaft 3, screening assembly is installed on the inner wall of containing frame 1, for stirring reactant, circulation component is installed on the side of containing frame 1, for reactant circulation processing, screening assembly includes first sliding slot, first sliding block 9, second sliding slot, second sliding block 10, first screen 11, connecting block 12, second screen 13 and reciprocating component, first sliding slot is opened on the inner wall of containing frame 1, first sliding block 9 is slidably connected on the inner wall of first sliding slot, second sliding slot is opened on the inner wall of containing frame 1, second sliding block 10 is slidably connected on the inner wall of second sliding slot, first screen 11 is fixedly connected between first sliding block 9 and second sliding block 10, each connecting block 12 is respectively fixedly connected at the bottom of first screen 11 both ends, second screen 13 is slidably connected on the inner wall of containing frame 1, and second screen 13 is fixedly connected with connecting block 12, reciprocating component is installed on the inner wall of containing frame 1, for driving first screen 11 reciprocating movement.

[0022] As the basic support structure of the whole polydithiopropane sulfonic acid sodium salt production filtering device, the containing frame 1 is made of high-strength stainless steel material, has good corrosion resistance and bearing capacity, and is designed in the shape of a cuboid. The bottom is slightly inclined, facilitating the discharge of liquid and fine particles. The top of the containing frame 1 is open, used for installing the sieve barrel 2 and other components. The sieve barrel 2 is located at the top center of the containing frame 1 and is fixedly connected to the top inner wall of the containing frame 1 by welding or bolt fastening. The sieve barrel 2 is internally provided with a precision screen for preliminarily filtering out larger impurities and unreacted raw materials. The top of the sieve barrel 2 is designed as an open type, facilitating the addition of reactants. Two input ports 26 are respectively arranged on both sides of the top of the containing frame 1, close to the sieve barrel 2, to ensure that the reactants can enter the sieve barrel 2 uniformly and efficiently. Adjustable flow valves are installed at the input ports 26 to facilitate the control of the addition speed and amount of reactants. The rotating shaft 3 penetrates the top center of the sieve barrel 2 vertically and is rotatably connected to the top of the sieve barrel through bearings to ensure smooth rotation without jamming. The four-blade plate 4 is fixed to the lower part of the rotating shaft 3 and is designed in the shape of four outwardly extending blades. The edges of the blades slightly contact the top inner wall of the sieve barrel 2. With the rotation of the rotating shaft 3, the four-blade plate 4 can drive the reactants in the sieve barrel 2 to be preliminarily stirred. Around the four-blade plate 4, soft rubber plates 5 are fixed. These rubber plates 5 closely adhere to the inner wall of the sieve barrel 2, not only playing a sealing role but also reducing friction noise during stirring and preventing material leakage. To enhance the overall structural strength of the four-blade plate 4 and the rubber plates 5, a plurality of connecting plates 6 and reinforcing plates 7 are evenly distributed along the rotating shaft 3. They are respectively fixedly connected with the rubber plates 5 to ensure the stability and durability of the stirring assembly during high-speed operation. The first motor 8 is installed on one side of the outside of the containing frame 1 and is directly connected with the rotating shaft 3 through a shaft coupling to provide the power required for stirring. The first sliding slot is horizontally arranged on one side of the inner wall of the containing frame 1, and the first sliding block 9 is slidingly connected therewith to ensure that the first screen 11 can move back and forth in the horizontal direction. The second sliding slot is located on the other side of the containing frame 1 and is parallel to the first sliding slot. The second sliding block 10 is also slidingly connected and supports the first screen 11 together with the first sliding block 9. The first screen 11 is located below the sieve barrel 2 and is used to further filter medium-sized particles in the reactants. The second screen 13 is located below the first screen 11 and is used to capture finer particles. Both of them are fixedly connected with the sliding blocks through the connecting blocks 12.

[0023] First, refer to Figure 1 In this embodiment, the circulating assembly includes a receiving frame 14, a conveying column 15, an auger 16, and a conveying plate 17. The receiving frame 14 is fixedly connected to the side of the containing frame 1. The conveying column 15 is fixedly connected to the receiving frame 14. The auger 16 is installed on the inner wall of the conveying column 15. The conveying plate 17 is fixedly connected to the top of the conveying column 15.

[0024] The receiving frame 14 is firmly fixed on one side of the containing frame 1, and its main function is to collect and temporarily store the liquid and small particles discharged from the bottom of the containing frame 1. The design of the receiving frame 14 takes into account the fluidity of the liquid, ensuring that the material can flow smoothly into it. The conveying column 15 is vertically installed above the receiving frame 14 and is stably connected to the receiving frame 14 through welding or bolts. The internal space of the conveying column 15 provides a channel for material transportation. The auger 16, also known as a screw conveyor, is installed on the inner wall of the conveying column 15. The auger 16 transports the material in the receiving frame 14 upwards along the conveying column 15 through rotational movement. The design of the auger 16's spiral blades ensures the continuity and stability of the material during transportation. The conveying plate 17 is fixedly connected to the top of the conveying column 15 and serves to receive the material transported by the auger 16 and guide it to the top of the containing frame 1, achieving the recycling of the material.

[0025] Then, referring to Figure 1 In this embodiment, the reciprocating assembly includes a mounting plate 18, a placement slot 27, a second motor 19, a rotating column 20, a first rotating rod 21, a second rotating rod 22, and a connecting assembly. The mounting plate 18 is fixedly connected to the inner wall of the containing frame 1. The placement slot 27 is opened in the containing frame 1. The second motor 19 is installed on the inner wall of the placement slot 27. The rotating column 20 is rotatably connected to the mounting plate 18, and the rotating column 20 is fixedly connected to the output shaft of the second motor 19. The first rotating rod 21 is rotatably connected to the rotating column 20. The second rotating rod 22 is rotatably connected to the first rotating rod 21. The connecting assembly is installed on the second rotating rod 22 and is used to link the second sliding block 10 and the second rotating rod 22.

[0026] The mounting plate 18 is fixedly connected to the inner wall of the containing frame 1, providing a mounting base for other components of the reciprocating assembly. The placement slot 27 is opened in the containing frame 1 for installing the second motor 19. The design of the placement slot 27 takes into account the size and installation requirements of the second motor 19, ensuring that the second motor 19 can be stably installed therein. The second motor 19 is installed on the inner wall of the placement slot 27, providing power for the reciprocating assembly. By controlling the rotation speed and direction of the second motor 19, precise control of the reciprocating motion of the first screen 11 can be achieved. The rotating column 20 is rotatably connected to the mounting plate 18 and is fixedly connected to the output shaft of the second motor 19. With the rotation of the motor, the rotating column 20 will drive the other components on it to move. The first rotating rod 21 and the second rotating rod 22 are rotatably connected to the rotating column 20, forming a lever mechanism. By adjusting the angle and length between the two, the reciprocating trajectory and amplitude of the first screen 11 can be changed.

[0027] Finally, referring to Figure 1In the embodiment, the connecting assembly comprises a moving plate 23, a connecting column 24 and a square plate 25, the moving plate 23 is slidingly connected to the mounting plate 18 and is rotationally connected to the second rotating rod 22, the connecting column 24 is fixedly connected to the moving plate 23, and the square plate 25 is fixedly connected to the second sliding block 10 and is fixedly connected to the connecting column 24.

[0028] The connecting assembly is mounted on the second rotating rod 22 and is used for connecting the second sliding block 10 and the second rotating rod 22, mainly comprises the moving plate 23, the connecting column 24 and the square plate 25, the moving plate 23 is slidingly connected to the mounting plate 18 and is rotationally connected to the second rotating rod 22, the connecting column 24 is fixedly connected to the moving plate 23, and the square plate 25 is fixedly connected to the second sliding block 10 and is fixedly connected to the connecting column 24, through the transmission of the connecting assembly, the rotating movement of the second motor 19 can be converted into the reciprocating movement of the first screen 11.

[0029] Working principle:

[0030] The polydithiopropyl sulfone sodium salt production filtering device, firstly, the worker pours the polydithiopropyl sulfone sodium salt reactant to be processed into the containing frame 1 through the input port 26, the input port 26 is located on the top of the containing frame 1 and is communicated with the sieve barrel 2, and the reactant can be smoothly introduced into the sieve barrel 2, the first motor 8 is started, the output shaft drives the rotating shaft 3 to start rotating, the four-leaf plate 4 on the rotating shaft 3 rotates, the rubber plate 5 and the inner wall of the sieve barrel 2 are in contact, which ensures the uniformity of stirring, the existence of the connecting plate 6 and the reinforcing plate 7 enhances the structural stability of the stirring assembly, preventing damage during stirring, the stirred reactant is preliminarily screened through the sieve barrel 2, the design of the sieve barrel 2 allows the reactant meeting the particle size requirement to pass through, while the larger particles are intercepted in the sieve barrel 2, at the same time, the reciprocating assembly is started, the second motor 19 drives the rotating column 20 to rotate, and then drives the first rotating rod 21 and the second rotating rod 22 to reciprocate, the second rotating rod 22 drives the second sliding block 10 to slide in the first sliding groove and the second sliding groove through the moving plate 23, the connecting column 24 and the square plate 25, so as to realize the reciprocating movement of the first screen 11, the reciprocating movement helps to further improve the screening effect, the reactant that does not pass through the first screen 11 falls into the receiving frame 14, the auger 16 is started, the blade rotates in the conveying column 15, and the reactant in the receiving frame 14 is conveyed to the conveying plate 17, the conveying plate 17 sends the reactant back to the containing frame 1 for re-stirring and screening, and the cycle processing process ensures the full use and efficient filtration of the reactant.

[0031] While the preferred embodiments of the application have been described, those skilled in the art will recognize that the application can be practiced with modification and alteration within the spirit and scope of the application. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive. The scope of the application is indicated by the appended claims, rather than by the foregoing description.

[0032] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the application can be practiced otherwise than as specifically described.

Claims

1. A filtering device for producing sodium polydisulfide propane sulfonate, comprising a containing frame (1), characterized in that: Also includes: A sieve barrel (2), the sieve barrel (2) being fixedly connected to the top inner wall of the containing frame (1); Input ports (26), each of the input ports (26) is respectively opened on both sides of the top of the holding frame (1), and each of the input ports (26) is communicated with the sieve barrel (2); A screening component, the screening component being mounted on the inner wall of the containing frame (1) and being used for screening reactants; The screening component includes: A first sliding groove, the first sliding groove being provided on the inner wall of the containing frame (1); a first sliding block (9), the first sliding block (9) being slidably connected to the inner wall of the first sliding groove; A second chute, the second chute being provided on the inner wall of the containing frame (1); a second slider (10), the second slider (10) being slidably connected to the inner wall of the second chute; a first screen (11), wherein the first screen (11) is fixedly connected between the first slider (9) and the second slider (10); Connecting blocks (12), each of the connecting blocks (12) is fixedly connected to both ends of the bottom of the first screen (11); a second screen (13), the second screen (13) being slidably connected to the inner wall of the containing frame (1), and the second screen (13) being fixedly connected to the connecting block (12); A reciprocating assembly, the reciprocating assembly being mounted on the inner wall of the containing frame (1) and being used to drive the first screen (11) to move back and forth; A circulation component is installed on the side of the containing frame (1) and is used for circulating the reactants.

2. The filtering device for producing sodium polydisulfide propane sulfonate according to claim 1, characterized in that: A stirring assembly, the stirring assembly being mounted on the top of the containing frame (1) and being used for stirring the reactants; The stirring assembly comprises: A rotating shaft (3), the rotating shaft (3) being rotatably connected to the sieve barrel; A four-leaf plate (4), the four-leaf plate (4) is fixedly connected to the rotating shaft (3), and the four-leaf plate (4) is slidably connected to the top of the screen barrel (2); Rubber plates (5), each of the rubber plates (5) is fixedly connected to the four-leaf plate (4) and each of the rubber plates (5) is in contact with the inner wall of the sieve barrel (2); Connecting plates (6), each of the connecting plates (6) is fixedly connected to the rotating shaft (3), and each of the connecting plates (6) is fixedly connected to the corresponding rubber plate (5); Reinforcement plates (7), each of the reinforcement plates (7) is fixedly connected to the rotating shaft (3), and each of the reinforcement plates (7) is fixedly connected to the corresponding rubber plate (5); A first motor (8), the first motor (8) is mounted on the inner wall of the containing frame (1), and the output shaft of the first motor (8) is fixedly connected to the rotating shaft (3).

3. The filtering device for producing sodium polydisulfide propane sulfonate according to claim 2, characterized in that: The loop components include: A receiving frame (14), the receiving frame (14) being fixedly connected to a side surface of the containing frame (1); A conveying column (15), wherein the conveying column (15) is fixedly connected to the receiving frame (14); An auger (16), the auger (16) being mounted on the inner wall of the delivery column (15); A conveying plate (17) is fixedly connected to the top of the conveying column (15).

4. The filtering device for producing sodium polydisulfide propane sulfonate according to claim 3, characterized in that: The reciprocating assembly comprises: A mounting plate (18), the mounting plate (18) being fixedly connected to the inner wall of the containing frame (1); A placement groove (27), wherein the placement groove (27) is provided on the containing frame (1); a second motor (19), the second motor (19) being mounted on the inner wall of the placement groove (27); a rotating column (20), the rotating column (20) being rotatably connected to the mounting plate (18), and the rotating column (20) being fixedly connected to the output shaft of the second motor (19); a first rotating rod (21), the first rotating rod (21) being rotatably connected to the rotating column (20); a second rotating rod (22), the second rotating rod (22) being rotatably connected to the first rotating rod (21); A connecting component is installed on the second rotating rod (22) and is used to link the second sliding block (10) and the second rotating rod (22).

5. The filtering device for producing sodium polydisulfide propane sulfonate according to claim 4, characterized in that: The connection component includes: a movable plate (23), the movable plate (23) being slidably connected to the mounting plate (18), and the movable plate (23) being rotationally connected to the second rotating rod (22); A connecting column (24), wherein the connecting column (24) is fixedly connected to the movable plate (23); A square plate (25) is fixedly connected to the second slider (10), and the second slider (10) is fixedly connected to the connecting column (24).

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