Screw structure and screw valve

Abstract

This utility model discloses a screw structure and a screw valve, relating to the field of screw valve technology. The screw structure includes a stator assembly, a screw, and a connecting assembly. The stator assembly includes a stator outer sleeve and a stator inner sleeve, with the stator outer sleeve fitted onto the outer peripheral wall of the stator inner sleeve. The screw is inserted into the shaft hole of the stator inner sleeve and can rotate relative to the stator inner sleeve. The connecting assembly includes a first nut, a second nut, and a connecting component. The first nut and the second nut are screwed to the two ends of the stator outer sleeve in the axial direction, respectively. The connecting component is fitted onto the screw and located on the stator outer sleeve, with its two axial sides abutting against the first nut and the stator inner sleeve, respectively. The multi-layer sealing design of the screw structure provided by this utility model effectively prevents fluid leakage from the gap between the screw and the stator assembly, improves the sealing performance of the screw valve, ensures reliable operation under harsh conditions such as high pressure or corrosive fluids, extends the service life of the equipment, and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of screw valve technology, and in particular to a screw structure and a screw valve. Background Technology

[0002] The screw valve used for dispensing is a high-precision, high-efficiency automated control device. It relies on the rotation of the screw around its own axis to extrude the glue and realize the dispensing operation. It is widely used in precision dispensing in the fields of electronics, automobiles, and medical care.

[0003] The screw structure is one of the core components of the entire screw valve device, playing a crucial role in the operation and control of the screw valve. In existing screw structures, the screw and stator are coaxially positioned and connected by bearings, with a plug installed between the screw and stator to prevent the medium inside the screw structure from flowing upwards and blocking the bearings. This plug is a consumable part, requiring regular replacement, resulting in high maintenance costs. Regular plug replacement also necessitates disassembling and reassembling the screw structure, impacting production efficiency. Furthermore, if the plug is damaged and not replaced promptly, the medium inside the screw structure will flow upwards under air pressure, damaging the bearings and affecting the service life of the screw structure. Utility Model Content

[0004] The main purpose of this invention is to propose a screw structure and a screw valve, which aims to improve the service life of the screw structure and reduce the maintenance cost of the screw valve.

[0005] To achieve the above objectives, the screw structure proposed in this utility model includes:

[0006] A stator assembly, comprising a stator outer sleeve and a stator inner liner, wherein the stator outer sleeve is fitted onto the outer peripheral wall of the stator inner liner;

[0007] A screw, which is inserted into the shaft hole of the stator liner and is rotatable relative to the stator liner;

[0008] A connecting assembly includes a first nut, a second nut, and a connecting component. The first nut and the second nut are screwed to both ends of the stator outer sleeve in the axial direction, respectively. The connecting component is sleeved on the screw and disposed on the stator outer sleeve. The two sides of the connecting component in the axial direction abut against the first nut and the stator inner liner, respectively.

[0009] In one embodiment, the connecting component includes a washer ring and a first washer connected to each other, the side of the washer ring facing away from the first washer abutting against the first nut, and the side of the first washer facing away from the washer ring abutting against the stator liner.

[0010] In one embodiment, the connecting component includes a sealed bearing, a second gasket, and a rotating plug that abut against each other in sequence. The side of the sealed bearing facing away from the second gasket abuts against the first nut, and the side of the rotating plug facing away from the second gasket abuts against the stator liner.

[0011] In one embodiment, at least two sealing bearings are provided, and each sealing bearing abuts against the other in sequence along the axial direction. An overflow hole is provided on the side wall of the stator outer sleeve, and the overflow hole is located at the height of the rotating plug on the stator outer sleeve.

[0012] In one embodiment, the screw structure further includes a flow channel assembly, which includes a flow channel component and a glue inlet nozzle. The sidewalls of the stator outer sleeve and the stator inner liner are both provided with through holes, and the two ends of the flow channel component in the length direction are respectively connected to the glue inlet nozzle and the through holes.

[0013] In one embodiment, the screw structure further includes a plug, the glue inlet is connected to the side wall of the flow channel component, and the plug is inserted into the flow channel component along the length direction of the flow channel component to seal the end of the flow channel component.

[0014] In one embodiment, the glue inlet nozzle is coaxially connected to the flow channel, and a sealing ring is provided at the connection position.

[0015] This utility model also proposes a screw valve, which includes the screw structure described above, and

[0016] Valve body; the valve body has a mounting cavity, and the screw structure is mounted in the mounting cavity;

[0017] A drive assembly, the output of which is connected to the end of the screw furthest from the second nut.

[0018] In one embodiment, the screw valve further includes a mounting base, and the drive assembly includes a drive member, a coupling, and an adapter shaft connected in sequence. The output end of the drive member is connected to the coupling, and the end of the adapter shaft away from the coupling is connected to the screw. The drive member is mounted on the mounting base, and the valve body is connected to the side of the mounting base opposite to the drive member.

[0019] In one embodiment, the screw valve further includes a syringe assembly, which includes a syringe and a syringe mounting bracket. The syringe mounting bracket is connected to the side wall of the mounting base, and a mounting groove is formed at one end of the syringe mounting bracket away from the mounting base. The syringe is engaged in the mounting groove and screwed in for fixation.

[0020] This utility model proposes a screw structure, including a stator assembly, a screw, and a connecting assembly. The stator assembly consists of a stator outer sleeve and a stator inner liner. The stator outer sleeve is fitted onto the outer peripheral wall of the stator inner liner. This split design facilitates separate processing and assembly, improving manufacturing flexibility and precision. The screw is inserted into the shaft hole of the stator inner liner and can rotate relative to the stator inner liner, realizing the rotational drive function of the screw and facilitating the transportation of fluids such as colloids through the rotation of the screw. The connecting assembly includes a first nut, a second nut, and a connecting component. The first nut and the second nut are screwed to the axial ends of the stator outer sleeve, forming a stable connection structure. The connecting component is fitted onto the screw and located on the stator outer sleeve, with its axial sides abutting against the first nut and the stator inner liner, respectively. This multi-layer connection design helps improve the stability of the screw valve, ensuring reliable operation of the screw valve under harsh conditions such as high pressure or corrosive fluids, extending the service life of the equipment, and reducing maintenance costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the screw valve provided by this utility model;

[0023] Figure 2 for Figure 1 Rear view of the screw valve;

[0024] Figure 3 for Figure 2 Cross-sectional view at position AA;

[0025] Figure 4 An exploded view of the screw valve mounting structure provided by this utility model;

[0026] Figure 5 for Figure 4 Schematic diagram of the rotating component;

[0027] Figure 6 for Figure 5 A structural schematic diagram of the rotating component from another perspective;

[0028] Figure 7 A three-dimensional structural diagram of the first embodiment of the screw structure provided by this utility model;

[0029] Figure 8 for Figure 7 Cross-sectional schematic diagram of the central screw structure;

[0030] Figure 9 A three-dimensional structural diagram of the second embodiment of the screw structure provided by this utility model;

[0031] Figure 10 for Figure 9 Cross-sectional schematic diagram of the central screw structure;

[0032] Figure 11 A three-dimensional structural diagram of the third embodiment of the screw structure provided by this utility model;

[0033] Figure 12 for Figure 11 A cross-sectional view of the screw structure.

[0034] Explanation of icon numbers:

[0035] 100. Screw valve; 10. Screw valve mounting structure; 1. Valve body; 11. Mounting cavity; 2. Screw structure; 21. Stator assembly; 211. Stator outer sleeve; 2111. First recess; 2112. Second recess; 212. Stator inner liner; 22. Screw; 23. Connecting assembly; 231. First nut; 232. Second nut; 233. Connecting component; 2331a. Washer ring; 2331b. First gasket; 2332a. Sealed bearing; 2332b. Second gasket; 23 32c, Rotary plug seal; 24, Flow channel assembly; 241, Flow channel component; 242, Inlet nozzle; 243, Plug; 3, Positioning assembly; 31, Positioning component; 32, Fastener; 33, Rotating component; 331, Groove structure; 34, Baffle; 35, First spring; 36, Second spring; 37, Lever; 40, Drive assembly; 401, Drive component; 402, Coupling; 403, Adapter shaft; 50, Mounting base; 60, Syringe assembly; 601, Syringe; 602, Syringe mounting bracket.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] The screw valve used for dispensing is a high-precision, high-efficiency automated control device. It relies on the rotation of the screw around its own axis to extrude the glue and realize the dispensing operation. It is widely used in precision dispensing in the fields of electronics, automobiles, and medical care.

[0041] The screw structure is one of the core components of the entire screw valve device, playing a crucial role in the operation and control of the screw valve. In existing screw structures, the screw and stator are coaxially positioned and connected by bearings, with a plug installed between the screw and stator to prevent the medium inside the screw structure from flowing upwards and blocking the bearings. This plug is a consumable part, requiring regular replacement, resulting in high maintenance costs. Regular plug replacement also necessitates disassembling and reassembling the screw structure, impacting production efficiency. Furthermore, if the plug is damaged and not replaced promptly, the medium inside the screw structure will flow upwards under air pressure, damaging the bearings and affecting the service life of the screw structure.

[0042] To solve the above problems, this utility model proposes a screw structure 2, including a stator assembly 21, a screw 22, and a connecting assembly 23. The stator assembly 21 includes a stator outer sleeve 211 and a stator inner liner 212, with the stator outer sleeve 211 fitted onto the outer peripheral wall of the stator inner liner 212. The screw 22 is inserted into the shaft hole of the stator inner liner 212 and can rotate relative to the stator inner liner 212. The connecting assembly 23 includes a first nut 231, a second nut 232, and a connecting component 233. The first nut 231 and the second nut 232 are screwed to the two ends of the stator outer sleeve 211 in the axial direction, respectively. The connecting component 233 is fitted onto the screw 22 and disposed on the stator outer sleeve 211, with the two sides of the connecting component 233 abutting against the first nut 231 and the stator inner liner 212 in the axial direction, respectively.

[0043] The present invention provides a screw structure 2, comprising a stator assembly 21, a screw 22, and a connecting assembly 23. The stator assembly 21 consists of a stator outer sleeve 211 and a stator inner liner 212. The stator outer sleeve 211 is fitted onto the outer peripheral wall of the stator inner liner 212. This split design facilitates separate processing and assembly, improving manufacturing flexibility and precision. The screw 22 is inserted into the shaft hole of the stator inner liner 212 and can rotate relative to the stator inner liner 212, realizing the rotational drive function of the screw 22 and facilitating the transport of fluids such as colloids through the rotation of the screw 22. The connecting assembly 23 includes a first nut 231, a second nut 232, and a connecting component 233. The first nut 231 and the second nut 232 are screwed to both ends of the stator outer sleeve 211, forming a stable connection structure. The connecting component 233 is sleeved on the screw 22 and located on the stator outer sleeve 211. Its axial sides abut against the first nut 231 and the stator inner liner 212, respectively. This multi-layer connection helps to improve the stability of the screw valve 100, ensures the reliable operation of the screw valve 100 under harsh conditions such as high pressure or corrosive fluids, extends the service life of the equipment, and reduces maintenance costs.

[0044] In an alternative embodiment, please refer to Figure 7 and Figure 8 The connecting component 233 includes a washer ring 2331a and a first washer 2331b connected to each other. The side of the washer ring 2331a facing away from the first washer 2331b abuts against the first nut 231, and the side of the first washer 2331b facing away from the washer ring 2331a abuts against the stator liner 212.

[0045] Specifically, both the washer 2331a and the stator liner 212 are made of metal. The washer 2331a is designed to fix the screw 22 relative to it, thus completing the axial installation and positioning of the screw 22 in the screw structure 2. The first washer 2331b is made of plastic and its main function is lubrication, reducing friction between the washer 2331a and the stator liner 212. The seal between the screw 22 and the stator liner 212 is mainly achieved by controlling the gap between the guide part of the screw 22 and the stator liner 212 to complete the rotation and sealing functions. For details, please refer to [link / reference needed]. Figure 8 At the top portion where the screw 22 mates with the stator liner 212, a section is not threaded. By controlling the diameter of the stator liner 212 bore and the shaft diameter of the screw 22 within this section during manufacturing and assembly, the screw can rotate within the stator liner 212 while achieving a certain degree of sealing, preventing fluid leakage. This structure eliminates the need for additional plug components, reducing material consumption and helping to lower maintenance costs during the dispensing process.

[0046] In another alternative embodiment, please refer to Figure 9 and Figure 10 The connecting component 233 includes a sealed bearing 2332a, a second gasket 2332b, and a rotating plug seal 2332c that abut against each other in sequence. The side of the sealed bearing 2332a facing away from the second gasket 2332b abuts against the first nut 231, and the side of the rotating plug seal 2332c facing away from the second gasket 2332b abuts against the stator liner 212.

[0047] Specifically, the rotary plug seal 2332c achieves a seal between the screw 22 and the stator outer sleeve 211, effectively preventing fluid leakage. The second gasket 2332b is made of plastic to prevent direct friction between the screw 22 and the rotary plug seal 2332c. The bearing guides the rotation of the screw 22. The bearing is a self-sealing end-cap bearing with its own sealing effect. The sealing end caps on both sides of the bearing prevent dirt from entering the bearing balls and affecting the movement and lifespan of the sealing bearing 2332a. Through the synergistic effect of different components, the screw valve 100 maintains a zero-leakage state during long-term operation, improving the safety and environmental friendliness of the production process, reducing material loss and equipment maintenance frequency caused by leakage, and is especially suitable for industries with extremely high sealing performance requirements such as fine chemicals, pharmaceuticals, and electronics.

[0048] Furthermore, at least two sealing bearings 2332a are provided, and each sealing bearing 2332a abuts against the other in sequence along the axial direction. An overflow hole is provided on the side wall of the stator outer sleeve 211, and the overflow hole is located at the height of the rotating plug seal 2332c at the stator outer sleeve 211.

[0049] The design of this multi-layer sealed bearing 2332a further enhances the sealing effect, effectively addressing the sealing challenges under extreme conditions such as high pressure and high temperature, and preventing fluid leakage from the gap between the screw 22 and the stator outer sleeve 211. An overflow hole is provided on the side wall of the stator outer sleeve 211, located at the height of the rotating plug seal 2332c within the stator outer sleeve 211. When the fluid pressure is too high or the connecting component 233 experiences slight wear, the overflow hole can promptly discharge the leaked fluid, preventing fluid accumulation inside the stator outer sleeve 211 and preventing the medium from flowing upwards to the bearing area in the event of plug damage. This prevents equipment damage or safety accidents caused by pressure accumulation. Specifically, in this embodiment, there are three sealed bearings 2332a. The more sealed bearings 2332a there are, the more accurate the axial positioning of the screw 22 assembly. This ensures high axial positioning accuracy even when the dimensions of the connecting component 23 have a certain deviation, improving the tolerance of the screw structure 2 to the dimensional accuracy of the parts. In other embodiments, the number of sealed bearings 2332a may also be different, and the specific selection can be made according to actual needs, without being specifically limited here. The existence of the overflow hole facilitates equipment maintenance. Operators can observe whether fluid is discharged from the overflow hole, promptly identify potential problems in the sealing system, and carry out targeted maintenance and repair, thereby improving the reliability and safety of equipment operation and reducing maintenance costs and equipment downtime.

[0050] In an optional embodiment, the screw structure 2 further includes a flow channel assembly 24, which includes a flow channel component 241 and a glue inlet 242. The sidewalls of the stator outer sleeve 211 and the stator inner liner 212 are provided with through holes. The two ends of the flow channel component 241 in the length direction are respectively connected to the glue inlet 242 and the through holes.

[0051] The design of the flow channel assembly 24 provides a clear path for fluid flow within the screw structure 2, allowing the fluid to smoothly enter from the inlet nozzle 242, pass through the flow channel component 241 and the through hole, and finally reach the working area of ​​the screw 22, achieving efficient fluid delivery. The flow channel component 241 not only optimizes the fluid flow direction and speed, reducing resistance and eddy currents during delivery and improving the working efficiency of the screw structure 2, but also prevents fluid stagnation and accumulation within the flow channel, reducing the risk of blockage and cleaning difficulty. This is particularly suitable for conveying high-viscosity, easily solidifying, or solid-particle-containing fluid media. Furthermore, the independent design of the flow channel assembly 24 facilitates replacement or cleaning when needed, improving the maintenance convenience and service life of the screw structure 2 and meeting the diverse fluid delivery requirements of different production processes.

[0052] In an optional embodiment, the screw structure 2 further includes a plug 243, the glue inlet 242 is connected to the side wall of the flow channel 241, and the plug 243 is inserted into the flow channel 241 along the length of the flow channel 241 to seal the end of the flow channel 241.

[0053] The design of the plug 243 effectively prevents external impurities and dust from entering the flow channel when the screw structure 2 is not in use or requires maintenance, keeping the flow channel clean and dry, preventing the fluid from prematurely solidifying or deteriorating within the flow channel, and ensuring the screw structure 2 can operate normally the next time it is used. Simultaneously, the detachable design of the plug 243 allows for quick and easy opening of the flow channel when fluid needs to be transported, minimizing disruption to the production process. Furthermore, the sealing performance of the plug 243 effectively prevents fluid leakage from the end of the flow channel component 241 during transport, further improving the overall sealing and reliability of the screw structure 2, effectively ensuring production safety and economic benefits. Optionally, to further improve the sealing performance at the connection point of the plug 243, a sealing element, such as a flexible gasket or sealing ring, can be used at the connection between the plug 243 and the flow channel to seal the connection.

[0054] In an optional embodiment, to improve the sealing performance between the inlet nozzle 242 and the flow channel, the inlet nozzle 242 is coaxially connected to the flow channel, and a sealing ring is provided at the connection position.

[0055] The coaxial connection ensures that the fluid flow direction is aligned with the channel axis upon entry, reducing impact and turbulence during fluid entry and improving the stability and efficiency of fluid delivery. The sealing ring further enhances the sealing performance between the inlet nozzle 242 and the channel, effectively preventing fluid leakage at the connection and ensuring reliable operation of the screw structure 2 under high pressure or high flow rate conditions. Simultaneously, this design can accommodate certain thermal expansion and mechanical vibration, improving connection stability and service life, reducing maintenance costs and equipment failure rates, and is particularly suitable for production environments requiring frequent start-ups and shutdowns or significant changes in operating conditions.

[0056] The following provides a detailed description of three embodiments of the screw 22 assembly in this solution:

[0057] First embodiment:

[0058] Please refer to Figure 7 and Figure 8In this embodiment, the screw 22 is first positioned and connected to the washer 2331a. The first washer 2331b is placed inside the stator outer sleeve 211. The assembly formed by the screw 22 and the washer 2331a is placed on the upper surface of the first washer 2331b. By controlling the gap between the screw 22 and the guide portion of the stator inner liner 212, the screw 22 can rotate while simultaneously completing the mechanical seal. The first nut 231 is provided on the upper surface of the stator outer sleeve 211 to prevent the assembly formed by the screw 22 and the washer 2331a from moving upward under the pressure inside the screw 22 assembly during operation. The stator liner 212 is interference-fitted with the stator outer sleeve 211. The first nut 231 is connected to the stator outer sleeve 211. The flow channel is connected to the stator outer sleeve 211, sealed by a sealing ring, and fixed by a flow channel fastening screw. The plug 243 is connected to the side of the flow channel away from the stator outer sleeve 211 and sealed by a sealing ring. The inlet nozzle 242 is connected to the side of the flow channel near the plug 243 and sealed by a sealing ring. In this embodiment, the screw 22 assembly can meet the requirements of certain pressure and speed conditions, allowing the screw 22 and stator assembly 21 to be coaxially positioned and rotated without the aid of bearings. It also eliminates the need for a plug structure for sealing, thus preventing the medium from flowing upwards. This reduces the cost of using vulnerable parts and regular maintenance.

[0059] Second embodiment:

[0060] Please refer to Figure 9 and Figure 10 In this embodiment, a rotary sealing plug 2332c is disposed within the inner cavity of the stator outer sleeve 211, providing a radial seal with the inner cavity of the stator outer sleeve 211 and the screw 22. A second gasket 2332b is disposed on the upper end of the rotary sealing plug 2332c, and the screw 22 is disposed on the upper end of the second gasket 2332b. The screw 22 achieves coaxial positioning of the stator outer sleeve 211 through three sealing bearings 2332a. A first nut 231 is disposed on the upper end face of the stator outer sleeve 211 to prevent the screw 22 and the three end cap sealing bearings 2332a from moving upward under the pressure inside the screw 22 assembly during operation. The stator inner liner 212 is interference-fitted with the stator outer sleeve 211. The flow channel is connected to the stator outer sleeve 211, sealed by a sealing ring, and fixed by the flow channel fastening screw. The plug 243 is connected to the side of the flow channel away from the stator outer sleeve 211 and sealed by a sealing ring. The glue inlet 242 is connected to the side of the flow channel near the plug 243 and sealed by a sealing ring. The screw 22 assembly in this embodiment can meet the requirements of high-speed and high-pressure use. At the same time, an overflow hole is added at the position of the rotating plug seal 2332c to prevent the medium from flowing upward to the bearing part when the rotating plug seal 2332c is damaged.

[0061] Third embodiment:

[0062] Please refer to Figure 11 and Figure 12In this embodiment, the screw 22 is first positioned and connected to the washer 2331a. The first washer 2331b is placed inside the stator outer sleeve 211. The assembly formed by the screw 22 and the washer 2331a is placed on the upper surface of the first washer 2331b. By controlling the gap between the screw 22 and the guide portion of the stator inner liner 212, the screw 22 can rotate while simultaneously completing the mechanical seal. The first nut 231 is set on the upper surface of the stator outer sleeve 211 to prevent the assembly formed by the screw 22 and the washer 2331a from moving upward under the pressure inside the screw 22 assembly during operation. The stator inner liner 212 is interference-fitted to the stator outer sleeve 211. The second nut 232 is connected to the stator outer sleeve 211. The flow channel is connected to the stator outer sleeve 211, sealed by a sealing ring, and fixed by a flow channel fastening screw. The glue inlet 242 is connected to the end of the flow channel away from the stator outer sleeve 211 and sealed by a sealing ring. In this embodiment, the first gasket 2331b, screw 22, stator liner 212, second nut 232, flow channel, and glue inlet 242 are all made of non-metallic materials. From the inlet of glue inlet 242, through the flow channel, into the inner cavity of stator liner 212, to the outlet of stator liner 212, the area through which the medium flows does not come into contact with metal materials, which can meet the requirements of anaerobic adhesive dispensing.

[0063] This utility model also proposes a screw valve 100, which includes a screw structure 2, a valve body 1, and a drive assembly 40. The valve body 1 forms a mounting cavity 11, and the screw structure 2 is mounted in the mounting cavity 11. The output end of the drive assembly 40 is connected to the end of the screw 22 away from the second nut 232. The specific structure of the screw structure 2 is as described in the above embodiments. Since this screw valve 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The valve body 1 forms a mounting cavity 11, and the screw structure 2 is mounted in the mounting cavity 11, providing a stable mounting foundation for the screw structure 2 and ensuring that it will not be displaced or loosened during operation, thereby ensuring the overall stability and reliability of the screw valve 100. The output end of the drive assembly 40 is connected to the end of the screw 22 away from the second nut 232, providing a power source for the rotation of the screw 22, enabling the screw 22 to rotate stably within the stator assembly 21, realizing the opening and closing actions of the screw valve 100. By organically combining the screw structure 2 with the valve body 1 and the drive assembly 40, a complete fluid control and conveying system is formed. It not only has precise flow control capabilities, but also can adapt to various complex working conditions and media, meeting the high-performance requirements of the screw valve 100 in multiple industrial fields such as packaging, dispensing, and injection molding. This improves production efficiency and product quality, and reduces equipment maintenance costs and operating risks.

[0064] Furthermore, to facilitate the installation and arrangement of the drive assembly 40, the screw valve 100 also includes a mounting base 50. The drive assembly 40 includes a drive element 401, a coupling 402, and a transition shaft 403 connected in sequence. The output end of the drive element 401 is connected to the coupling 402, and the end of the transition shaft 403 away from the coupling 402 is connected to the screw 22. The drive element 401 is mounted on the mounting base 50, and the valve body 1 is connected to the side of the mounting base 50 facing away from the drive element 401. The mounting base 50 provides a stable mounting foundation for the drive assembly 40, ensuring that the drive assembly 40 will not shake or shift during operation, thereby improving the overall stability and reliability of the screw valve 100. The drive assembly 40 includes a drive element 401, a coupling 402, and a transition shaft 403 connected in sequence. This split design allows each component to be manufactured and assembled independently, improving production efficiency and maintenance convenience. The output end of the drive unit 401 is connected to the coupling 402, and the end of the adapter shaft 403 away from the coupling 402 is connected to the screw 22. This transmission chain design effectively transmits power, ensuring smooth and precise rotation of the screw 22. The drive unit 401 is mounted on the mounting base 50, and the valve body 1 is connected to the side of the mounting base 50 facing away from the drive unit 401. This layout not only optimizes the overall structure of the screw valve 100, making it more compact and reasonable, but also facilitates installation and maintenance in limited space, reducing construction difficulty and cost. At the same time, this design also helps improve the transmission efficiency of the screw valve 100, reduce energy loss, and extend the service life of the equipment.

[0065] In an optional embodiment, to facilitate the dispensing operation of the screw valve 100, the screw valve 100 further includes a syringe assembly 60. The syringe assembly 60 includes a syringe 601 and a syringe mounting bracket 602. The syringe mounting bracket 602 is connected to the side wall of the mounting base 50. A mounting groove is formed at the end of the syringe mounting bracket 602 away from the mounting base 50, and the syringe 601 is engaged in the mounting groove and screwed in. The design of the syringe mounting bracket 602 provides a stable mounting position for the syringe 601, ensuring that the syringe 601 will not shake or loosen during dispensing, thus improving the stability and accuracy of dispensing. The addition of the syringe assembly 60 enables the screw valve 100 to not only have precise flow control capabilities but also to achieve precise metering and delivery of fluid media such as colloids, meeting the needs for high-precision dispensing and coating in fields such as electronic packaging, biomedicine, and fine chemicals. Meanwhile, the connection method between the syringe mounting bracket 602 and the mounting base 50, as well as the snap-fit ​​and screw-fixing method between the syringe 601 and the syringe mounting bracket 602, not only improves the reliability of installation but also facilitates the quick replacement and maintenance of the syringe 601. This adapts to the diverse needs of different production tasks for syringe 601 specifications and types, improving the equipment's versatility and flexibility, and reducing the company's equipment procurement and maintenance costs. In this embodiment, the part of the syringe mounting bracket 602 that mounts the syringe 601 is a semi-circular structure, with the syringe 601 snapped onto the syringe 601 mounting base 50 from the side. In other embodiments, the mounting part can also be designed as a ring structure. By inserting the syringe 601 downwards into the ring structure, the ring structure fits onto the outer peripheral wall of the syringe 601, thus achieving the installation and fixation of the syringe 601. The specific choice can be made according to actual needs.

[0066] Optionally, to facilitate easy assembly and disassembly between the screw structure 2 and the valve body 1, the screw valve 100 also includes a positioning assembly 3. For details, please refer to [link / reference needed]. Figures 1 to 4 The valve body 1 has a mounting cavity 11, and a first channel and a second channel are formed circumferentially spaced within the valve body 1. A screw structure 2 is mounted in the mounting cavity 11, and a first recess 2111 and a second recess 2112 are formed on the outer side wall of the screw structure 2. The first recess 2111 corresponds to the first channel, and the second recess 2112 corresponds to the second channel. The positioning assembly 3 includes a positioning member 31, a fastener 32, and a rotating member 33. The positioning member 31 is elastically mounted in the first channel, and a portion of its structure extends out of the first channel and abuts against the first recess 2111. The fastener 32 is located in the second channel, and the rotating member 33 is located in the valve body 1. The outer peripheral wall of the rotating member 33 abuts against the fastener 32 and can rotate to push the fastener 32 to have a first position where it is disengaged from the second recess 2112, and a second position where a portion of its structure abuts against the second recess 2112.

[0067] The mounting cavity 11 of the valve body 1 provides a stable mounting space for the screw structure 2, while the circumferentially spaced first and second channels provide the necessary positions for the installation and operation of the positioning assembly 3. The outer wall of the screw structure 2 is designed with a first recess 2111 and a second recess 2112, corresponding to the first and second channels respectively, making the installation of the screw structure 2 within the valve body 1 more precise and avoiding problems such as poor sealing or inflexible operation due to positional deviations. The positioning element 31 in the positioning assembly 3 is elastically mounted in the first channel, with a portion extending out and abutting against the first recess 2111, achieving initial axial positioning of the screw structure 2 and preventing excessive displacement during installation. The fastener 32 is located in the second channel, and the rotating element 33 is located in the valve body 1. The rotation of the rotating element 33 drives the fastener 32 to switch between the first and second positions. When the fastener 32 is in the first position, it disengages from the second recess 2112, facilitating the installation or disassembly of the screw structure 2. When in the second position, part of the structure engages with the second recess 2112, securing the screw structure 2 and ensuring a stable and reliable connection between the screw structure 2 and the valve body 1 during use. This prevents the screw structure 2 from loosening due to vibration or pressure changes, thus guaranteeing the overall performance and service life of the screw valve 100. With the screw valve installation structure 10 of this solution, during installation, the fastener 32 is first disengaged from the second recess 2112, allowing the positioning member 31 to engage with the first recess 2111 for positioning and installation of the screw 22 assembly. Since the first positioning member 31 is elastically installed within the first channel, a collision sound is generated when the positioning member 31 engages with the first recess 2111 to prompt the operator for further operation. Then, by rotating the rotating member 33, the fastener 32 is pushed to engage with the second recess 2112 to achieve a secure connection between the screw structure 2 and the valve body 1. This ensures the tightness of the screw valve 100 installation connection, improves the convenience of disassembly and assembly, and eliminates the need for screw tightening during disassembly and assembly, avoiding screw stripping or damage to the valve body threaded hole during repeated disassembly and assembly, thus helping to extend the service life of the screw valve 100.

[0068] In an optional embodiment, to facilitate the installation and engagement of the positioning member 31 and the fastener 32, please refer to... Figures 4 to 6 Both the positioning member 31 and the fastener 32 are spheres. The peripheral wall of the rotating member 33 has a groove structure 331. The groove structure 331 extends along the circumference of the rotating member 33, and the depth of the groove structure 331 gradually increases / decreases. The fastener 32 is engaged in the mounting groove and can move relative to the mounting groove as the rotating member 33 rotates. When the fastener 32 is in the first position, the fastener 32 is located at the deepest part of the groove structure 331. When the fastener 32 is in the second position, the fastener 32 is located at the shallowest part of the groove structure 331.

[0069] In actual design, fastener 32 and positioning element 31 can also be rod-shaped structures with ball-shaped ends. The linear movement of fastener 32 within the first channel is achieved through the abutment of the elastic element, thereby enabling the positioning element 31 to engage and disengage from the first recess 2111. Furthermore, the fastener 32 is engaged and disengaged from the second recess 2112 by rotating the rotating element 33, thus facilitating the assembly and disassembly of the screw valve 100. In this embodiment, to improve the smoothness of the engagement between positioning element 31 and the first recess 2111, and between fastener 32 and the second recess 2112, both positioning element 31 and fastener 32 are designed as spherical shapes. This shape not only facilitates installation and movement within the channel but also ensures a tight fit with the recesses, improving the reliability of positioning and fastening. The groove structure 331 formed on the peripheral wall of the rotating member 33 extends circumferentially and gradually changes in depth, providing a guiding path for the movement of the fastener 32. This ensures that the fastener 32 remains within the groove structure 331 during rotation, preventing it from disengaging from the rotating member 33. The fastener 32 is engaged in the mounting groove and moves relative to the rotating member 33 along the mounting groove, enabling the fastener 32 to switch between a first position and a second position. When the fastener 32 is in the first position, it is located at the deepest part of the groove structure 331, at which point the fastener 32 disengages from the second recess 2112, facilitating the installation or removal of the screw structure 2. When the fastener 32 is in the second position, it is located at the shallowest part of the groove structure 331, with part of the structure abutting against the second recess 2112, thus securing the screw structure 2. During the design process, the depth of the groove structure 331 on the side wall of the rotating component 33 gradually changes. When the fastener 32 is in different positions within the groove structure 331, the distance between the fastener 32 and the corresponding second recess 2112 also varies. When the rotating component 33 rotates to the deepest point of the groove structure 331, the fastener 32 disengages from the second recess 2112, facilitating the installation of the screw structure 2 into the valve body 1. After installation, the rotating component 33 is rotated in the opposite direction, causing the fastener 32 to gradually align with the shallowest part of the groove structure 331. At this point, the fastener 32 and the second recess 2112 engage and abut, ensuring the stability of the connection between the valve body 1 and the screw structure 2. This design cleverly utilizes the rotational motion of the rotating component 33, simplifying the complex fastening operation into a simple rotational action, improving operational convenience and efficiency. Simultaneously, it ensures the stability and reliability of the fastener 32 in different positions, further enhancing the overall performance of the screw valve mounting structure 10. In this embodiment, the tightening effect is achieved by forming a groove structure 331 on the side wall of the rotating member 33 and engaging with the fastener 32. In other embodiments, the rotating member 33 can also be a cam structure similar to one with an eccentric shaft. The tightening connection between the screw structure 2 and the valve body 1 is achieved by the cam structure engaging with the fastener 32. The specific choice can be made according to actual needs and is not specifically limited here.In addition, to prevent the positioning element 31 and the fastener 32 from detaching from the first and second channels, please refer to the following. Figure 3 Both the first channel and the second channel have a limiting structure at the end near the mounting cavity 11. The limiting structure corresponds to and cooperates with the positioning member 31 and the fastener 32, so that a part of the structure of the positioning member 31 and the fastener 32 can respectively cooperate with the first recess 2111 and the second recess 2112, and will not detach from the first channel and the second channel, thus ensuring the stability of the positioning member 31 and the fastener 32 in the screw valve 100.

[0070] In an optional embodiment, for ease of achieving the movable cooperation of the positioning component 3, please refer to... Figures 1 to 4 The positioning component 3 also includes a baffle 34, a first elastic element 35, and a second elastic element 36. The baffle 34 is connected to the side wall of the valve body 1. The first elastic element 35 is disposed in the first channel. The two axial sides of the first elastic element 35 abut against the baffle 34 and the positioning element 31, respectively. The two axial sides of the second elastic element 36 abut against the rotating element 33 and the baffle 34, respectively.

[0071] The baffle 34 is connected to the side wall of the valve body 1, providing a mounting point for the first elastic element 35 and the second elastic element 36. The first elastic element 35 is located in the first channel, with its axial sides abutting against the baffle 34 and the positioning element 31, respectively. This arrangement allows the positioning element 31 to have a certain elastic preload within the first channel, better adapting to the installation and minor displacement of the screw structure 2, ensuring a tight fit between the positioning element 31 and the first recess 2111, and improving the positioning accuracy and stability. The second elastic element 36 is sleeved on the rotating element 33, with its axial sides abutting against the rotating element 33 and the baffle 34, respectively. The second elastic element 36 provides preload to the rotating element 33, ensuring that the rotating element 33 remains stationary regardless of its rotational state, preventing it from loosening during operation and causing the screw structure 2 to detach from the valve body 1. The addition of this elastic structure not only improves the operational convenience of the positioning assembly 3 but also enhances the stability and reliability of the entire system, ensuring the stable performance of the screw valve 100 during long-term use. Optionally, in this embodiment, both the first elastic element 35 and the second elastic element 36 are springs. In other embodiments, the first elastic element 35 and the second elastic element 36 can also be elastic pads or pad blocks, which can be selected according to actual needs.

[0072] In an optional embodiment, for ease of rotation of the rotating member 33, please refer to... Figures 1 to 4The positioning component 3 also includes a lever 37, which is connected to the end of the rotating member 33 away from the baffle 34, so as to rotate the rotating member 33 relative to the valve body 1. The lever 37, connected to the end of the rotating member 33 away from the baffle 34, provides a convenient point of force application for the operator. By moving the lever 37, the rotating member 33 can be easily rotated relative to the valve body 1, realizing the switching of the fastener 32 between the first and second positions. This design significantly improves the convenience and flexibility of operation, especially in situations where space is limited or frequent operation is required. Operators can complete the installation, disassembly, and tightening of the screw structure 2 without using complex tools or applying excessive force, greatly improving work efficiency and reducing labor intensity. At the same time, the presence of the lever 37 also helps to achieve precise control of the operation, avoiding problems such as poor fit between the fastener 32 and the recess due to over-rotation or under-rotation, further improving the performance and reliability of the screw valve mounting structure 10, making it easier to promote and apply in actual production. In practical applications, the angle of the lever 37 relative to the valve body 1 can be marked. For example, when the fastener 32 is in the first position and the second position respectively, the angle of the lever 37 relative to the valve body 1 can be marked. In this way, during disassembly and assembly, the fit between the fastener 32 and the second recess 2112 can be determined by the angle of the lever 37. In this embodiment, the length of the groove structure 331 is approximately 4 / 4 of the circumference of the rotating member 331. The fastener 32 moves 1 / 4 of the circumference of the rotating member 331 to switch between the shallowest and deepest parts of the groove structure 331. That is, the rotation stroke of the lever 37 is 90°. For example, when the lever 37 is horizontal, it is the initial position. At this time, the fastener 32 is at the shallowest part of the groove structure 331, and the end of the fastener 32 away from the groove structure 331 abuts against the second recess 2112. When it is necessary to install the screw 22 assembly, the lever 37 is turned 90° clockwise to gradually disengage the fastener 32 from the second recess 2112. The fastener 32 moves to the deepest part of the groove structure 331. After the screw 22 assembly is installed on the valve body 1, the lever 37 is turned 90° counterclockwise to tighten the fastener 32, thereby realizing the installation of the screw valve 100 and ensuring the stability of the connection between the screw structure 2 and the valve body 1. In other embodiments, the travel of lever 37 can also be other angles, which can be selected according to actual needs, and are not specifically limited here.

[0073] Please refer to Figures 1 to 4 The following details the installation method of the screw valve 100 provided in this solution:

[0074] First, move lever 37 upwards by 90° to disengage fastener 32 from the second recess 2112;

[0075] The second step is to install the screw 22 assembly onto the valve body until the positioning part 31 falls into the first recess 2111 and makes a "click" sound to indicate that the installation is in place.

[0076] The third step is to move the lever 37 downward by 90°, and the fastener 32 falls into the second recess 2112. The two opposite ends of the fastener 32 abut against the second recess 2112 and the shallowest part of the groove structure 331 on the rotating part 33, respectively.

[0077] Fourth step: Place syringe 601 to complete the assembly of screw valve 100.

[0078] The quick-release structure of the screw valve 100 in this solution allows for the assembly and disassembly of the screw 22 assembly with only a turn of less than half a turn. This high efficiency and tool-free assembly and disassembly eliminates the need for screw fastening, thus avoiding screw stripping or damage to the valve body threaded holes during repeated assembly and disassembly, and helping to extend the service life of the screw valve 100.

[0079] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A screw structure, characterized in that, include: A stator assembly, comprising a stator outer sleeve and a stator inner liner, wherein the stator outer sleeve is fitted onto the outer peripheral wall of the stator inner liner; A screw, which is inserted into the shaft hole of the stator liner and is rotatable relative to the stator liner; A connecting assembly includes a first nut, a second nut, and a connecting component. The first nut and the second nut are screwed to both ends of the stator outer sleeve in the axial direction, respectively. The connecting component is sleeved on the screw and disposed on the stator outer sleeve. The two sides of the connecting component in the axial direction abut against the first nut and the stator inner liner, respectively.

2. The screw structure as described in claim 1, characterized in that, The connecting component includes a washer ring and a first washer connected to each other. The side of the washer ring facing away from the first washer abuts against the first nut, and the side of the first washer facing away from the washer ring abuts against the stator liner.

3. The screw structure as described in claim 1, characterized in that, The connecting component includes a sealed bearing, a second gasket, and a rotating plug that abut against each other in sequence. The side of the sealed bearing facing away from the second gasket abuts against the first nut, and the side of the rotating plug facing away from the second gasket abuts against the stator liner.

4. The screw structure as described in claim 3, characterized in that, At least two sealed bearings are provided, and each sealed bearing abuts against the other in sequence along the axial direction. An overflow hole is provided on the side wall of the stator outer sleeve, and the overflow hole is located at the height of the rotating plug on the stator outer sleeve.

5. The screw structure as described in any one of claims 1 to 4, characterized in that, The screw structure also includes a flow channel assembly, which includes a flow channel component and a glue inlet nozzle. The side walls of the stator outer sleeve and the stator inner liner are provided with through holes. The two ends of the flow channel component in the length direction are respectively connected to the glue inlet nozzle and the through holes.

6. The screw structure as described in claim 5, characterized in that, The screw structure also includes a plug, the glue inlet is connected to the side wall of the flow channel component, and the plug is inserted into the flow channel component along the length direction of the flow channel component to seal the end of the flow channel component.

7. The screw structure as described in claim 5, characterized in that, The glue inlet nozzle is coaxially connected to the flow channel, and a sealing ring is provided at the connection position.

8. A screw valve, characterized in that, Including the screw structure as described in any one of claims 1 to 7, and Valve body; the valve body has a mounting cavity, and the screw structure is mounted in the mounting cavity; A drive assembly, the output of which is connected to the end of the screw furthest from the second nut.

9. The screw valve as described in claim 8, characterized in that, The screw valve also includes a mounting base. The drive assembly includes a drive element, a coupling, and an adapter shaft connected in sequence. The output end of the drive element is connected to the coupling. The end of the adapter shaft away from the coupling is connected to the screw. The drive element is mounted on the mounting base. The valve body is connected to the side of the mounting base opposite to the drive element.

10. The screw valve as described in claim 9, characterized in that, The screw valve also includes a syringe assembly, which includes a syringe and a syringe mounting bracket. The syringe mounting bracket is connected to the side wall of the mounting base. A mounting groove is formed at the end of the syringe mounting bracket away from the mounting base. The syringe is engaged in the mounting groove and screwed in for fixation.

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