Heating device and screw valve

Abstract

The invention discloses a heating device and a screw valve, and relates to the technical field of screw valves, the heating device comprises a needle cylinder mounting structure and a needle cylinder heating structure, the needle cylinder mounting structure comprises an outer cover and a needle cylinder mounting part, the needle cylinder mounting part is provided with a mounting cavity used for accommodating a needle cylinder, the outer cover sleeves the needle cylinder mounting part, and the needle cylinder heating structure is arranged in the mounting cavity. A mounting space is formed between the inner peripheral wall of the outer cover and the outer peripheral wall of the needle cylinder mounting piece; the needle cylinder heating structure comprises a heating piece and a connecting piece, the heating piece wraps the peripheral wall of the needle cylinder installation structure and is arranged in the installation space, and the connecting piece is electrically connected with the heating piece. The heating piece of the heating device is tightly attached to the peripheral wall of the needle cylinder installation structure, so that heat can be directly and efficiently transmitted to the needle cylinder, the heating time is shortened, the requirement for rapid temperature rise of medium materials such as colloid in the needle cylinder in the production process is met, and the continuity and uniformity of the heating process are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of screw valves, in particular to a heating device and a screw valve. Background Art

[0002] With technological advancements, hot melt adhesive dispensing operations are gradually maturing. As the most quintessential environmentally friendly adhesive, hot melt adhesive, being solvent-free and 100% solid, has adapted to development trends and has therefore experienced rapid growth. Existing hot melt adhesive screw valves use a heating rod as the heat source in the syringe heating mechanism. Temperature sensors are located within a certain distance, acting as the basis for the temperature control unit to control temperature rise. This concentrated heating of the heating rod results in uneven temperature distribution in the syringe heating mechanism, leading to uneven heating of the hot melt adhesive within the syringe. This can easily lead to denaturation of the adhesive due to temperature differences, affecting the overall quality of the adhesive. Summary of the Invention

[0003] The main purpose of the present invention is to provide a heating device and a screw valve, which are intended to improve the heating uniformity of the colloid in the syringe during heating and ensure the heating effect.

[0004] To achieve the above-mentioned purpose, the heating device proposed by the present invention includes:

[0005] A syringe mounting structure, comprising an outer cover and a syringe mounting member, wherein the syringe mounting member is formed with a mounting cavity for accommodating a syringe, the outer cover is sleeved on the syringe mounting member, and an installation space is formed between the inner peripheral wall of the outer cover and the outer peripheral wall of the syringe mounting member;

[0006] The syringe heating structure includes a heating plate and a connecting piece. The heating plate is covered on the outer peripheral wall of the syringe mounting structure and is arranged in the mounting space. The connecting piece is electrically connected to the heating plate.

[0007] In one embodiment, the syringe mounting member includes a base and a mounting cylinder, the mounting cylinder is connected to the top of the base, the base is formed with a through hole, the bottom end of the syringe is clamped in the through hole, and the glue outlet of the syringe passes through the through hole, and the top of the mounting cylinder is formed with a mounting hole for placing the syringe into the mounting cavity.

[0008] In one embodiment, the heating device further comprises a window structure, wherein the window structure is provided on a side wall of the syringe mounting structure and passes through the syringe mounting structure, and the window structure forms a visualization window.

[0009] In one embodiment, the heating device further includes a heat insulating member, which is disposed in the installation space and sleeved on the outer peripheral wall of the heating plate.

[0010] In one embodiment, the heating structure further includes a first temperature sensor, which is disposed on an outer peripheral wall of the syringe mounting component.

[0011] In one embodiment, the heating device also includes a syringe adapter structure, which includes an air inlet nozzle, a syringe adapter, a clamping seat and a connecting seat, the connecting seat is connected to the top of the outer cover, the clamping seat is clamped with the connecting seat, the syringe adapter is connected to the clamping seat, one end of the syringe adapter is clamped on the inner wall of the syringe, and the other end is connected to the air inlet nozzle.

[0012] In one embodiment, the syringe adapter structure further includes a sealing ring, and the sealing rings include at least two sealing rings, and the sealing rings are spaced apart along the length direction of the syringe adapter.

[0013] In one embodiment, the side of the card seat facing the connecting seat extends inward and bends to form a clamping portion, an avoidance structure is formed in the circumference of the connecting seat, and a clamping groove is formed on the side of the connecting seat facing away from the card seat. The card seat approaches the connecting seat along the avoidance structure, so that the clamping portion extends under the connecting seat and rotates at a preset angle to cooperate with the clamping groove.

[0014] In one embodiment, the heating device further comprises a needle mounting structure and a needle heating structure;

[0015] The needle mounting structure includes a first mounting member and a second mounting member connected to each other, wherein the first mounting member is formed with a mounting groove for accommodating the flow channel, and the second mounting member is formed with a connecting portion for mounting the needle cover;

[0016] The needle heating structure includes a heating element and a connecting component. The first mounting member is further formed with a first mounting hole. The heating element is arranged in the first mounting hole. The connecting component is arranged at one end of the first mounting member away from the second mounting member. The connecting member is electrically connected to the heating element.

[0017] The present invention further provides a screw valve, comprising a heating device and a valve body, wherein the valve body is formed with a glue inlet, the glue inlet being connected to the glue outlet of the syringe. The heating device comprises:

[0018] A syringe mounting structure, comprising an outer cover and a syringe mounting member, wherein the syringe mounting member is formed with a mounting cavity for accommodating a syringe, the outer cover is sleeved on the syringe mounting member, and an installation space is formed between the inner peripheral wall of the outer cover and the outer peripheral wall of the syringe mounting member;

[0019] The syringe heating structure includes a heating plate and a connecting piece. The heating plate is covered on the outer peripheral wall of the syringe mounting structure and is arranged in the mounting space. The connecting piece is electrically connected to the heating plate.

[0020] The technical solution of the present invention proposes a heating device, including a syringe mounting structure and a syringe heating structure. The syringe mounting structure is combined with the syringe mounting part through an outer cover, which not only provides stable support and protection for the syringe, but also provides an ideal position for the placement of the heating plate through the installation space between the two. The heating plate is tightly attached to the outer wall of the syringe mounting structure, so that heat can be directly and efficiently transferred to the syringe, achieving rapid heating, greatly improving the heat transfer efficiency, shortening the heating time, and meeting the demand for rapid heating of dielectric materials such as colloids in the syringe during the production process. The electrical connection design between the connector and the heating plate ensures the stability and reliability of the heating process, avoids heating interruptions or power fluctuations caused by unstable connections, thereby ensuring the continuity and uniformity of the heating process, so that the colloid in the syringe can be heated evenly, avoiding local overheating or uneven heating. This is especially important for some temperature-sensitive materials, and can effectively prevent the material properties from being denatured due to temperature differences. In addition, the compactness and rationality of this overall structure not only facilitates the installation and maintenance of the heating device, but also provides space for its subsequent functional expansion and performance optimization. For example, when it is necessary to add temperature monitoring or automatic control functions, it can be easily integrated and upgraded to adapt to the diverse needs of different production scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a screw valve provided by the present invention;

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

[0024] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the screw valve;

[0025] Figure 4 A schematic diagram of the explosion structure of an embodiment of the heating device provided by the present invention;

[0026] Figure 5for Figure 1 Structural diagram of the middle syringe installation structure;

[0027] Figure 6 for Figure 1 Schematic diagram of the exploded structure of the syringe adapter;

[0028] Figure 7 for Figure 1 Schematic diagram of the exploded structure of the needle mounting structure;

[0029] Figure 8 for Figure 5 Schematic diagram of the coordination between the middle card holder and the connecting seat;

[0030] Figure 9 for Figure 8 Schematic diagram of the coordination between the middle card holder and the connecting seat from another perspective;

[0031] Figure 10 for Figure 7 A schematic diagram of the three-dimensional structure of the first mounting member and the second mounting member;

[0032] Figure 11 for Figure 10 A side view of the first mounting member and the second mounting member.

[0033] Description of Figure Numbers:

[0034] 100, screw valve; 10, heating device; 11, syringe mounting structure; 111, outer cover; 112, syringe mounting member; 1121, base; 1122, mounting cylinder; 12, syringe heating structure; 121, heating plate; 122, connector; 13, window structure; 14, thermal insulation member; 15, first temperature sensor; 16, syringe adapter structure; 161, air inlet nozzle; 162, syringe adapter; 163, card seat; 1631, card connection portion; 164, connector; 1641, card slot; 1 65. Sealing ring; 21. Needle mounting structure; 211. First mounting member; 2111. Mounting groove; 2112. First mounting hole; 2113. Second mounting hole; 2114. Connecting hole; 212. Second mounting member; 2121. Connecting portion; 22. Needle heating structure; 221. Heating member; 222. Connecting assembly; 2221. Mounting seat; 2222. Connecting tube; 2223. Connector mounting seat; 2224. Connector; 23. Second temperature sensor; 24. Fastener; 30. Syringe.

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] With technological advancements, hot melt adhesive dispensing operations are gradually maturing. As the most quintessential environmentally friendly adhesive, hot melt adhesive, being solvent-free and 100% solid, has adapted to development trends and has therefore experienced rapid growth. Existing hot melt adhesive screw valves use a heating rod as the heat source in the syringe heating mechanism. Temperature sensors are located within a certain distance, acting as the basis for the temperature control unit to control temperature rise. This concentrated heating of the heating rod results in uneven temperature distribution in the syringe heating mechanism, leading to uneven heating of the hot melt adhesive within the syringe. This can easily lead to denaturation of the adhesive due to temperature differences, affecting the overall quality of the adhesive.

[0040] To solve the above problems, please refer to Figures 1 to 6The present invention proposes a heating device 10, including a syringe mounting structure 11 and a syringe heating structure 12. The syringe mounting structure 11 includes an outer cover 111 and a syringe mounting part 112. The syringe mounting part 112 forms a mounting cavity for accommodating a syringe 30. The outer cover 111 is sleeved on the syringe mounting part 112. An installation space is formed between the inner peripheral wall of the outer cover 111 and the outer peripheral wall of the syringe mounting part 112; the syringe heating structure 12 includes a heating plate 121 and a connecting part 122. The heating plate 121 is covered on the outer peripheral wall of the syringe mounting structure 11 and is arranged in the installation space. The connecting part 122 is electrically connected to the heating plate 121.

[0041] The technical solution of the present invention provides a heating device 10, which includes a syringe mounting structure 11 and a syringe heating structure 12. The syringe mounting structure 11 is connected to the syringe mounting member 112 via an outer cover 111. This not only provides stable support and protection for the syringe 30, but also provides an ideal location for the placement of a heating plate 121 through the mounting space between the two. The heating plate 121 is tightly attached to the outer wall of the syringe mounting structure 11, allowing heat to be directly and efficiently transferred to the syringe 30, achieving rapid heating. This greatly improves heat transfer efficiency, shortens heating time, and meets the demand for rapid heating of dielectric materials such as colloids in the syringe 30 during the production process. The electrical connection design between the connector 122 and the heating plate 121 ensures the stability and reliability of the heating process, avoids heating interruptions or power fluctuations caused by unstable connections, and thus ensures the continuity and uniformity of the heating process, so that the colloid in the syringe 30 can be evenly heated, avoiding local overheating or uneven heating. This is especially important for some temperature-sensitive materials and can effectively prevent the material properties from being denatured due to temperature differences. In addition, the compactness and rationality of this overall structure not only facilitates the installation and maintenance of the heating device 10, but also provides space for its subsequent functional expansion and performance optimization. For example, when it is necessary to add temperature monitoring or automatic control functions, it can be easily integrated and upgraded to meet the diverse needs of different production scenarios.

[0042] In an optional embodiment, to facilitate the installation of the syringe mounting member 112, please refer to Figures 1 to 4The syringe mounting member 112 includes a base 1121 and a mounting cylinder 1122. The mounting cylinder 1122 is connected to the top of the base 1121. The base 1121 is formed with a through hole. The bottom end of the syringe 30 is fixed to the through hole, and the glue outlet of the syringe 30 passes through the through hole. The top of the mounting cylinder 1122 is formed with a mounting hole for placing the syringe 30 into the mounting cavity. The through hole of the base 1121 is designed to fix the bottom end of the syringe 30, and the glue outlet of the syringe 30 can pass through the through hole, ensuring the stable installation of the syringe 30 on the base 1121 and the precise alignment of the glue outlet. The top of the mounting cylinder 1122 is formed with a mounting hole for placing the syringe 30 into the mounting cavity, providing vertical support and positioning for the syringe 30, preventing the syringe 30 from shaking or tilting during use. This split syringe mounting member 112 design not only improves the stability of the syringe 30 installation, but also facilitates the quick replacement and maintenance of the syringe 30. In actual production, when the syringe 30 needs to be replaced, the syringe 30 can be simply removed from the through hole of the base 1121 and the mounting hole of the mounting cylinder 1122. At the same time, the combined structure of the base 1121 and the mounting cylinder 1122 can also adapt to syringes 30 of different heights and diameters, enhancing the compatibility of the heating device 10 with syringes 30 of different models and meeting diversified production needs. In addition, this design is also conducive to optimizing the force distribution of the syringe mounting structure 11, improving its load-bearing capacity and durability, ensuring that the syringe mounting structure 11 can operate stably and reliably during long-term, high-intensity heating and glue dispensing processes, reducing the risk of equipment failure, and improving the continuity and stability of the production process. For example, in the fields of packaging electronic components and assembling precision instruments, it can significantly improve the convenience of operation and production reliability, reduce product quality problems caused by human operational errors, and also help to extend the service life of the heating device 10 and reduce maintenance costs.

[0043] In an optional embodiment, in order to facilitate observation of the situation in the syringe 30 during the heating process, please refer to Figure 4 and Figure 5The heating device 10 also includes a window structure 13, which is provided on the side wall of the syringe mounting structure 11 and passes through the syringe mounting structure 11. The window structure 13 forms a visualization window. By providing a visualization window that passes through the side wall of the syringe mounting structure 11, in this embodiment, the window structure 13 is a frame structure provided on the side wall of the outer cover 111. The visualization effect can be achieved by providing transparent glass or resin lenses in the frame structure, and the purpose of separating the internal space of the syringe mounting structure 11 from the outside world is achieved, thereby preventing the external environment from affecting or interfering with the internal syringe 30. The operator can observe the state changes of the substance in the syringe 30 in real time and intuitively without disassembling any components, such as color changes, viscosity changes, etc. This intuitive monitoring method plays an irreplaceable role in actual production, especially in some precision production scenarios that have strict requirements on the heating process, so that the operator can promptly detect abnormal conditions and respond quickly. For example, when an abnormal change in the color of the material is observed, it may indicate that the temperature is too high, causing the material to deteriorate. The operator can immediately adjust the heating parameters or suspend heating, thereby effectively avoiding serious consequences such as product scrapping or equipment damage due to failure to detect in time. In addition, the window structure 13 also makes it convenient for the operator to observe the remaining glue in the syringe 30, so that it can be replaced in time before the glue is exhausted, avoiding the production of defective products. The design of the window structure 13 also facilitates regular inspection and cleaning of the interior of the syringe 30, ensuring the hygiene and safety of the production process, meeting the high requirements for equipment cleanliness and maintenance convenience, and further improving the overall performance and applicability of the heating device 10.

[0044] In an optional embodiment, to achieve heat insulation treatment of the syringe mounting structure 11, please refer to Figures 1 to 4 The heating device 10 also includes a heat insulating member 14, which is arranged in the installation space and is sleeved on the outer wall of the heating plate 121. This layout can effectively prevent heat from diffusing to the outside and concentrate the heat around the syringe mounting structure 11 to the maximum extent, thereby improving the efficiency of heat utilization, reducing energy waste, and reducing production costs. In actual production environments, it is particularly significant in some usage scenarios that require long-term continuous heating. It can reduce electricity consumption while ensuring the heating effect. At the same time, the heat insulating member 14 also plays an important safety protection role, avoiding the risk of burns to the operator due to the high surface temperature of the heating device 10, reducing safety hazards, ensuring the safe operation of the equipment, and meeting the strict requirements for equipment safety in industrial production. In addition, the presence of the heat insulating member 14 also helps to maintain a stable temperature in the workshop, reduces the increase in workshop temperature caused by heat dissipation of the heating device 10, improves the working environment, and improves the work comfort and production efficiency of employees.

[0045] In an optional embodiment, in order to facilitate the real-time control of the heating temperature during the heating process of the syringe 30, please refer to Figures 3 to 5 The heating device 10 also includes a first temperature sensor 15, which is provided on the outer wall of the syringe mounting part 112. The installation position of the first temperature sensor 15 enables it to directly and accurately sense the temperature of the outer periphery of the syringe mounting part 112, and this temperature is directly correlated with the temperature of the colloid and other substances in the syringe 30. By monitoring this temperature data in real time and continuously, the control system can automatically and accurately adjust the power of the heating plate 121 according to the preset temperature range, thereby realizing intelligent and automatic control of the heating process. Ensure stability during the heating process. In addition, the application of temperature sensors also helps to realize the automation and unmanned operation of the production process, reduces manual intervention, and improves production efficiency. At the same time, through long-term recording and analysis of temperature data, it can also provide valuable information for the maintenance and optimization of the heating device 10, further improving the performance and reliability of the heating device 10.

[0046] In an optional embodiment, to improve the versatility of the heating device 10, please refer to Figures 3 to 6 The heating device 10 also includes a syringe adapter structure 16. The syringe adapter structure 16 includes an air inlet nozzle 161, a syringe adapter 162, a holder 163 and a connecting seat 164. The connecting seat 164 is connected to the top of the outer cover 111. The holder 163 is snap-fitted to the connecting seat 164. The syringe adapter 162 is connected to the holder 163. One end of the syringe adapter 162 is snap-fitted to the inner wall of the syringe 30, and the other end is connected to the air inlet nozzle 161. The design of the syringe adapter structure 16 fully considers the adaptation requirements of syringes 30 of different specifications and models, and has extremely high versatility and flexibility. The stable connection between the connecting seat 164 and the outer cover 111 provides a solid foundation for the entire adapter structure, ensuring the stability of the adapter structure during the heating and glue discharging process. The snap-fitting method of the holder 163 and the connecting seat 164 is simple in design and easy and quick to operate. Disassembly and installation can be quickly completed without the aid of complex tools, which greatly improves the maintenance efficiency and use flexibility of the heating device 10. The tight engagement of one end of the syringe adapter 162 with the inner wall of the syringe 30 not only ensures a tight seal between the two, preventing gas or colloid leakage, but also effectively transmits the gas pressure provided by the air inlet nozzle 161, ensuring that the colloid can be smoothly discharged from the syringe 30. This structure has a wide range of advantages in practical applications, especially in production scenarios where syringes 30 need to be frequently replaced or multiple syringes 30 of different specifications are used. It helps to significantly improve operational convenience and production efficiency, and reduce production interruptions or quality problems caused by poor adaptation.

[0047] Optionally, to further improve the sealing effect between the syringe 30 and the syringe adapter 162, please refer to Figures 1 to 6The syringe adapter structure 16 also includes a sealing ring 165, which includes at least two sealing rings 165, and each sealing ring 165 is spaced apart along the length direction of the syringe adapter 162. The setting of the sealing ring 165 constructs multiple reliable sealing barriers between the syringe adapter 162 and the syringe 30, effectively preventing gas or colloid from leaking from the gap between the two. The spaced arrangement of the multiple sealing rings 165 further enhances the reliability and durability of the seal. Even if one of the sealing rings 165 is slightly worn or aged due to long-term use, the other sealing rings 165 can continue to play a sealing role, ensuring the stability of the internal pressure and avoiding problems such as unstable glue discharge and material waste due to leakage. In the actual production process, especially in some high-pressure, high-precision glue discharge application scenarios, such as sealant coating of automotive parts, waterproof glue injection of electronic equipment, etc., this reliable sealing performance is crucial to ensuring product quality and production efficiency. In addition, the material selection and design optimization of the sealing ring 165 can also adapt to complex working conditions such as different temperatures and media, further expanding the application range of the heating device 10, improving the adaptability and service life of the equipment, and reducing maintenance costs and equipment failure rates.

[0048] In an optional embodiment, in order to facilitate the snap-fitting between the clamping base 163 and the connecting base 164, the side of the clamping base 163 facing the connecting base 164 is extended inward and bent to form a snap-fitting portion 1631. A circumferential avoidance structure is formed on the connecting base 164, and a snap-fitting groove 1641 is formed on the side of the connecting base 164 facing away from the clamping base 163. The clamping base 163 approaches the connecting base 164 along the avoidance structure, so that the snap-fitting portion 1631 extends under the connecting base 164 and rotates at a preset angle to match the snap-fitting groove 1641. Please refer to Figure 8 and Figure 9, avoidance structures are formed on both sides of the circumference of the connecting seat 164, so that the width at the position of the avoidance structure is smaller than the width between the clamping parts 1631 on both sides of the base 163. During installation, the base 163 is moved toward the connecting seat 164 along the position of the avoidance structure, and the base 163 is rotated after the clamping part 1631 passes over the avoidance structure, so that the clamping part 1631 on the base 163 is clamped in the clamping groove 1641. During the heating process of the syringe 30, the position of the air inlet nozzle 161 is inflated and expands to a certain extent due to heat, so that the base 163 moves up a certain distance, so that the clamping part 1631 hooks the clamping groove 1641 to achieve connection and fixation, thereby improving the stability of the connection between the base 163 and the connecting seat 164. The precise fit between the clamping portion 1631 of the clamping seat 163 and the clamping groove 1641 of the connecting seat 164 achieves a secure connection between the clamping seat 163 and the connecting seat 164, ensuring that there will be no loosening or displacement between the two during the heating and dispensing process, thereby ensuring the stability and reliability of the syringe adapter structure 16. The rational arrangement of the avoidance structure enables the clamping seat 163 to be smoothly aligned and extended under the connecting seat 164 during installation, making it easy to operate and eliminating the need for a complex alignment process, thereby greatly improving installation efficiency. The clamping operation method, which can be completed by rotating a preset angle, is not only simple and easy to operate, but also effectively prevents problems such as loose connections or damage caused by misoperation. This connection method improves the convenience of installation and maintenance of the heating device 10 in actual applications, especially in production scenarios where frequent replacement of the syringe adapter 162 or equipment maintenance is required. It can help reduce the adjustment time of the heating device 10, improve production efficiency, and reduce labor intensity. At the same time, the reliability and stability of this structure also help to extend the service life of the equipment, reduce the maintenance costs caused by loosening or damage of the connecting portion 2121, and improve the overall performance and economic benefits of the equipment.

[0049] In an optional embodiment, to facilitate heating of the needle and flow channel, please refer to Figures 1 to 3 ,as well as Figure 7 The heating device 10 also includes a needle mounting structure 21 and a needle heating structure 22; the needle mounting structure 21 includes a first mounting member 211 and a second mounting member 212 connected to each other, the first mounting member 211 is formed with a mounting groove 2111 for accommodating the flow channel, and the second mounting member 212 is formed with a connecting portion 2121, and the connecting portion 2121 is used to install the needle cover; the needle heating structure 22 includes a heating element 221 and a connecting assembly 222, the first mounting member 211 is also formed with a first mounting hole 2112, the heating element 221 is arranged in the first mounting hole 2112, the connecting assembly 222 is arranged at one end of the first mounting member 211 away from the second mounting member 212, and the connecting member 122 is electrically connected to the heating element 221.

[0050] The combination of the needle mounting structure 21 and the needle heating structure 22 improves the function of the entire heating device 10, enabling it to better meet the diverse needs in actual production. The needle mounting structure 21 provides a stable mounting base for the needle through the mutual connection of the first mounting part 211 and the second mounting part 212, ensuring the stability and accuracy of the needle during the glue discharge process. The design of the mounting groove 2111 on the first mounting part 211 enables the flow channel to be accurately placed, ensuring the smooth flow of the colloid during the transportation process, and avoiding the problem of poor glue discharge caused by flow channel deviation or blockage. The connecting part 2121 on the second mounting part 212 facilitates the installation and fixation of the needle cover, ensuring a good connection between the needle and the external pipeline or equipment, and preventing colloid leakage. The heating element 221 in the needle heating structure 22 is located in the first mounting hole 2112, which can directly heat the flow channel and the needle part, effectively preventing the colloid from solidifying and clogging due to temperature reduction during transportation, and ensuring the continuity and stability of glue discharge. The electrical connection design between the connecting assembly 222 and the heating element 221 ensures stable power supply to the heating element 221, enabling continuous and uniform heating and avoiding issues with adhesive delivery quality caused by heating interruptions or temperature fluctuations. This has a wide range of advantages in practical applications, particularly in applications requiring precise adhesive control, such as sealing adhesive coating in the packaging industry and precision dispensing in dispensing processes. It can significantly improve adhesive delivery quality, ensuring the product's sealing performance and appearance quality, and helping to increase production efficiency and product qualification rates.

[0051] In an optional embodiment, to facilitate the installation arrangement of the connection component 222, please refer to Figures 1 to 3 ,as well as Figure 7The connecting assembly 222 includes a mounting seat 2221, a connecting pipe 2222, a joint mounting seat 2223 and a joint 2224 connected in sequence. The mounting seat 2221 is connected to the first mounting member 211, and the joint 2224 is used to connect to the power supply. The connection between the mounting seat 2221 and the first mounting member 211 provides a stable installation foundation for the entire connecting assembly 222, ensuring the reliability of the connection. The function of the connecting pipe 2222 is to connect the mounting seat 2221 with the joint mounting seat 2223, in order to facilitate the arrangement of circuits inside the connecting assembly 222, so as to form a continuous electrical connection channel, thereby ensuring that the current can be stably transmitted to the heating element 221. In this embodiment, the connecting pipe 2222 is a corrugated pipe, which has good flexibility and elasticity: it can adapt to the thermal expansion and contraction of the pipeline, effectively absorb the expansion and contraction deformation of the pipeline caused by temperature changes, reduce the stress caused by thermal expansion and contraction of the pipeline, and thus extend the service life of the pipeline system. The use of a bellows can reduce the effects of thermal expansion on the needle heating structure 22, thereby improving the safety of the heating device 10. The connector mounting base 2223 provides a mounting location for the connector 2224, which is used to connect to the power supply and is a key component of the entire connection assembly 222. The rationality and stability of its design directly affect the power supply stability and ease of operation of the heating device 10. This split connection assembly 222 design not only facilitates the independent manufacture and assembly of each component, improving production efficiency and reducing manufacturing costs, but also makes it more convenient to repair or replace components without disassembling the entire heating device 10, improving the maintainability of the equipment and extending the service life of the heating device 10.

[0052] In an optional embodiment, in order to facilitate the temperature control of the needle heating structure 22, please refer to Figure 7 、 Figure 10 as well as Figure 11The heating device 10 also includes a second temperature sensor 23. The first mounting member 211 is further formed with a second mounting hole 2113, and the second temperature sensor 23 is disposed within the second mounting hole 2113. This design enables the heating device 10 to monitor the temperature of the needle tip in real time. The second temperature sensor 23 can directly sense temperature changes near the flow channel or at the needle tip and promptly feed the temperature signal back to the control system. The control system compares and analyzes the received temperature data with a preset temperature range, thereby automatically adjusting the power of the heating element 221. This closed-loop temperature control system can effectively address temperature fluctuations caused by factors such as changes in ambient temperature and changes in the flow state of the colloid, ensuring that the temperature of the needle tip always remains within the optimal operating range. For temperature-sensitive colloid materials, such as epoxy resin glue in electronic packaging and medical glue in the biomedical field, this can effectively prevent problems such as material performance degradation or failure due to excessively high temperatures, as well as poor glue discharge due to excessively low temperatures. This ensures the stability and consistency of product quality and improves the reliability and yield rate of the production process.

[0053] In an optional embodiment, the first mounting hole 2112 and the second mounting hole 2113 are both extended along the length direction of the first mounting member 211, and the first mounting hole 2112 is formed with a first opening on the side facing the connecting component 222, the first opening being connected to the mounting seat 2221, and the second mounting hole 2113 is formed with a second opening on the side facing the connecting component 222, the second opening being connected to the mounting seat 2221. Figure 10 and Figure 11A mounting groove 2111 is formed on the first mounting member 211 for mounting the flow channel, and a first mounting hole 2112 and a second mounting hole 2113 are opened below the mounting groove 2111 along the length direction of the first mounting member 211. The first mounting hole 2112 is used to mount the heating member 221, and the second mounting hole 2113 is used to mount the second temperature sensor 23. Positioning the heater 221 and the second temperature sensor 23 below the flow channel facilitates heating and temperature control of the flow channel. Furthermore, the first mounting hole 2112 and the second mounting hole 2113 are arranged along the length of the first mounting hole 2112, while the second mounting member 212 is connected to one end of the length of the first mounting member 211. This allows the depth of the heater 221 and the second temperature sensor 23 within the first mounting hole 2112 and the second mounting hole 2113 to be adjusted, thereby adjusting the distance between the heater 221 and the second temperature sensor 23 and the mounting member, thereby achieving heating and temperature control of the needle and needle cover within the second mounting member 212. This simplifies the structure of the heating device 10 while simultaneously achieving heating of the flow channel and the needle, thereby improving the effectiveness of the heating device 10. The mounting holes extending along the length of the flow channel better accommodate the installation requirements of the heater 221 and the second temperature sensor 23, ensuring that they are evenly distributed along the flow channel, thereby achieving comprehensive heating and accurate temperature monitoring of all parts of the flow channel. Secondly, the connection design between the first opening and the second opening and the mounting base 2221 provides a reasonable wiring path for the wires or connectors 122 in the connecting assembly 222, making the electrical connection between the heating element 221 and the second temperature sensor 23 more convenient and reliable, avoiding the crisscrossing of the lines, and improving the neatness and safety of the heating device 10. In addition, this opening design is also convenient for operators to operate when installing or replacing the heating element 221 and the second temperature sensor 23, thereby improving the maintenance efficiency of the equipment. At the same time, a reasonable hole layout also helps to optimize the structural strength of the first mounting member 211, avoids the problem of structural weakening caused by excessive openings, ensures the stability and durability of the needle mounting structure 21, and meets the high reliability requirements of the heating device 10 in industrial production.

[0054] In an optional embodiment, to improve the stability of the runner installation in the mounting groove 2111, the heating device 10 further includes a fastener 24. The side wall of the first mounting member 211 is formed with a connection hole 2114. The fastener 24 is screwed into the connection hole 2114 and abuts the runner to achieve fixation. The main function of the design of the fastener 24 is to firmly clamp and fix the runner, ensuring that the runner does not shift or loosen during the heating and glue dispensing process. The fastener 24 can be a bolt or a screw. The fastener 24 is rotated between the side wall of the first mounting member 211 and the connection hole 2114 to abut and fix the runner in the mounting groove 2111. The screw connection of the fastener 24 is simple to operate and the connection is reliable. The tightening degree of the fastener 24 can be flexibly adjusted according to the actual size of the runner and the installation requirements to achieve precise fixation of the runner. This fastening method not only improves the stability of the runner installation, but also effectively prevents problems such as unstable glue dispensing and glue leakage caused by the runner loosening, thereby ensuring the quality and efficiency of glue dispensing. At the same time, the setting of the fastener 24 also facilitates the rapid replacement and maintenance of the flow channel. When it is necessary to replace the flow channel of different specifications or types, the old flow channel can be easily removed and the new flow channel can be installed by simply loosening the fastener 24, thereby improving the adaptability and flexibility of the equipment, shortening the downtime of the equipment, and improving production efficiency.

[0055] In an optional embodiment, to facilitate the molding and fabrication of the first and second mounting members 211, 212, the first and second mounting members 211, 212 are integrally formed. This integrated structure improves the overall stability and reliability of the needle mounting structure 21. This integrated structure eliminates the risks of loosening and leakage associated with the connections between separate components, enhancing the rigidity of the entire needle mounting structure 21 and enabling it to better withstand the thermal expansion forces generated during heating and the colloid pressure during glue dispensing. In actual production, particularly in applications requiring frequent glue dispensing or high-temperature heating, the integrated structure ensures precise alignment and stable connection between the needle and the flow channel, preventing component displacement or loosening due to long-term use or mechanical vibration, thereby ensuring accurate and continuous glue dispensing. Furthermore, the integrated structure simplifies the manufacturing process, reduces the number of components and assembly steps, lowers production costs and assembly errors, and improves production efficiency and product quality consistency. This structure also helps reduce the overall size of the heating device 10, making it more compact and easier to install and use within limited spaces.

[0056] In an optional embodiment, to facilitate installation of the needle guard, a mounting step is formed on the outer peripheral wall of the connecting portion 2121, and the needle guard is mounted on the mounting step. The mounting step ensures a secure connection and precise installation of the needle guard and the connecting portion 2121. The mounting step provides a positioning reference surface for the needle guard, allowing the needle guard to be accurately positioned during installation, preventing problems such as deviation or loosening caused by improper needle guard installation. Furthermore, to further enhance the stability of the connection between the needle guard and the mounting step, bolts, screws, or threaded connections can be used for securement. Furthermore, this design facilitates adjustment and replacement of needle guards of varying specifications, improving the adaptability of the heating device 10 to different needle types and meeting diverse production needs. In practice, the mounting step design makes installation and removal of the needle guard more convenient and quick, eliminating the need for complex tools or tedious procedures. This improves equipment maintenance efficiency and operational convenience, reduces production interruptions caused by needle guard replacement, and enhances overall production efficiency.

[0057] The present invention also proposes a screw valve 100, which includes a valve body and a heating device 10. The valve body is formed with a glue inlet, which is connected to the glue outlet of the syringe 30. The specific structure of the heating device 10 is similar to the above-mentioned embodiments. Since the present screw valve 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. By applying the above-mentioned heating device 10 to the screw valve 100, a perfect combination of heating and glue discharge control is achieved, greatly expanding the application field and functional value of the heating device 10. The heating device 10 accurately and uniformly heats the glue in the syringe 30, maintaining good fluidity and meeting the process requirements of the screw valve 100 for glue delivery. The glue inlet on the valve body is precisely connected to the glue outlet of the syringe 30, ensuring that the glue can smoothly enter the valve body from the syringe 30, thereby achieving quantitative and timed glue discharge through the precise control of the screw valve 100. The efficient heating performance of the heating device 10 combined with the precise control capability of the screw valve 100 not only ensures the temperature and fluidity of the colloid during transportation, avoids problems such as poor glue discharge and colloid waste due to temperature changes, but also enables precise adjustment of parameters such as glue discharge volume and glue discharge speed to meet the diverse needs of different production scenarios.

[0058] The following is a detailed description of the assembly method of the screw valve 100 in this embodiment:

[0059] Step 1: Assemble the syringe mounting structure 11 and the syringe heating structure 12 together, and connect them to the valve body through the connecting ring on the side wall of the outer cover 111:

[0060] Step 2: Assemble the needle mounting structure 21 and the needle heating structure 22 together and connect them to the valve body; connect the flow channel at the bottom of the valve body to the first mounting member 211, and connect the needle structure to the second mounting member 212;

[0061] Step 3: Place the dispensing syringe 30 in the inner cavity of the syringe heating structure 12, and rotate the dispensing syringe 30 to connect it to the glue feeding nozzle;

[0062] Step 4: Install the two clamping parts 1631 of the clamping seat 163 of the syringe adapter 162 along the two avoidance structures of the connecting seat 164, and place the syringe adapter 162 downward to mate with the syringe 30;

[0063] Step 5: Rotate the syringe adapter 162 so that the two engaging portions 1631 of the holder 163 fall into the two connecting engaging grooves 1641 of the connecting seat 164. When the dispensing syringe 30 is ventilated, the two engaging portions 1631 of the holder 163 and the two connecting grooves 1641 of the connecting seat 164 are reliably connected under the action of air pressure, completing the overall installation of the screw valve 100. The overall structure of the screw valve 100 is modular in design to facilitate subsequent disassembly and maintenance. The overall structure uses only a small number of screws for fixing, which not only improves the reliability of the connection between the various components, but also improves the convenience of disassembly and assembly.

[0064] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A heating device, characterized in that: include: A syringe mounting structure, comprising an outer cover and a syringe mounting member, wherein the syringe mounting member is formed with a mounting cavity for accommodating a syringe, the outer cover is sleeved on the syringe mounting member, and an installation space is formed between the inner peripheral wall of the outer cover and the outer peripheral wall of the syringe mounting member; The syringe heating structure includes a heating plate and a connecting piece. The heating plate is covered on the outer peripheral wall of the syringe mounting structure and is arranged in the mounting space. The connecting piece is electrically connected to the heating plate.

2. The heating device according to claim 1, wherein The syringe mounting member includes a base and a mounting cylinder, the mounting cylinder is connected to the top of the base, the base is formed with a through hole, the bottom end of the syringe is clamped in the through hole, and the glue outlet of the syringe passes through the through hole, and the top of the mounting cylinder is formed with a mounting hole for placing the syringe into the mounting cavity.

3. The heating device according to claim 2, characterized in that The heating device further comprises a window structure, which is arranged on a side wall of the syringe mounting structure and passes through the syringe mounting structure, and the window structure forms a visualization window.

4. The heating device according to claim 2, wherein The heating device further includes a heat insulating member, which is arranged in the installation space and sleeved on the outer peripheral wall of the heating plate.

5. The heating device according to claim 2, wherein The heating device further includes a first temperature sensor, which is disposed on the outer peripheral wall of the syringe mounting component.

6. The heating device according to any one of claims 1 to 5, characterized in that The heating device also includes a syringe adapter structure, which includes an air inlet nozzle, a syringe adapter, a clamping seat and a connecting seat. The connecting seat is connected to the top of the outer cover, the clamping seat is clamped with the connecting seat, and the syringe adapter is connected to the clamping seat. One end of the syringe adapter is clamped on the inner wall of the syringe, and the other end is connected to the air inlet nozzle.

7. The heating device according to claim 6, characterized in that The syringe adapter structure further includes a sealing ring, which includes at least two sealing rings, and each of the sealing rings is spaced apart along the length direction of the syringe adapter.

8. The heating device according to claim 7, characterized in that The side of the card seat facing the connecting seat extends inward and bends to form a clamping portion, an avoidance structure is formed on the circumference of the connecting seat, and a clamping groove is formed on the side of the connecting seat facing away from the card seat. The card seat approaches the connecting seat along the avoidance structure, so that the clamping portion extends under the connecting seat and rotates at a preset angle to cooperate with the clamping groove.

9. The heating device according to claim 8, characterized in that The heating device also includes a needle mounting structure and a needle heating structure; The needle mounting structure includes a first mounting member and a second mounting member connected to each other, wherein the first mounting member is formed with a mounting groove for accommodating the flow channel, and the second mounting member is formed with a connecting portion for mounting the needle cover; The needle heating structure includes a heating element and a connecting component. The first mounting member is further formed with a first mounting hole. The heating element is arranged in the first mounting hole. The connecting component is arranged at one end of the first mounting member away from the second mounting member. The connecting member is electrically connected to the heating element.

10. A screw valve, characterized in that: comprising the heating device according to any one of claims 1 to 9, and The valve body is formed with a glue inlet, and the glue inlet is connected to the glue outlet of the syringe.

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