Multi-head dispensing valve

Abstract

The utility model belongs to the technical field of dispensing valves, and discloses a multi-head dispensing valve which comprises a glue storage channel, a dispensing valve block, a glue transfer valve assembly and a glue suction assembly, the glue storage channel is used for storing glue, the dispensing valve block is arranged at the lower end of a valve body and used for completing dispensing operation, the glue transfer valve assembly is located between the glue suction assembly and the dispensing valve block, and the glue suction assembly is used for sucking glue. According to the embodiment, through the design of the multiple sets of dispensing holes in the dispensing valve block, each set of dispensing channel corresponds to at least two sets of dispensing holes, multi-point synchronous dispensing can be carried out in the same operation period, the number of the dispensing holes is small, the number of the dispensing holes is small, the number of the dispensing holes is small, and the dispensing efficiency is high. Compared with a traditional single-head dispensing scheme, the multi-head dispensing design has the advantages that the dispensing efficiency is improved, the multi-head dispensing design is particularly suitable for a production environment needing a large amount of dispensing operation, and the working efficiency of a production line is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dispensing valves, and particularly to a multi-head dispensing valve. Background Technique

[0002] In modern industrial production, the dispensing process is widely used in the manufacturing processes of products such as printed circuit boards, integrated circuits, and light strips. The application of dispensers has greatly improved production efficiency and product quality. Especially in the processes that require precise control of the amount and position of glue, the dispenser plays a key role. Currently, on the market, especially the dispensers used for light strip production, usually adopt the design of multi-head dispensing valves, and achieve efficient dispensing operations through the combination of multi-head glue outlets and glue storage cavities. Most existing dispensers adopt a single-row arrangement. The design of a single-row glue storage cavity with a single-row glue outlet has a relatively low dispensing efficiency, cannot fully utilize the potential of multi-head dispensing, and limits the overall efficiency of the production line.

[0003] As recorded in the prior art, a multi-head phosphor glue dispensing valve (CN113198685B) can improve the dispensing efficiency by changing from single-row to double-row dispensing or increasing the product length to increase the dispensing holes. However, increasing the product length will cause the driving device and positioning device of the old model to be mismatched. If changing from single-row to double-row, restricted by the radius size of the inner shaft valve of the dispensing valve, it is only suitable for single-row grooving. Therefore, how to improve the dispensing efficiency on the premise of being compatible with previous equipment is an urgent problem to be solved.

[0004] Therefore, a multi-head dispensing valve is proposed to solve the above problems. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a multi-head dispensing valve, aiming to solve the problem that the existing single-row to double-row design of the dispensing valve is restricted by the radius size of the inner shaft valve of the dispensing valve, is only suitable for single-row grooving, and has a low dispensing efficiency.

[0006] To achieve the above utility model purpose, the utility model proposes a multi-head dispensing valve, including a valve body. A glue storage channel, a dispensing valve block, a glue transfer valve assembly, and a glue suction assembly are provided on the valve body. The glue storage channel is used to store glue. The dispensing valve block is arranged at the lower end of the valve body. The glue transfer valve assembly is arranged between the glue suction assembly and the dispensing valve block and is used to switch the connection between the glue storage channel and the dispensing valve block or an external tank body. The glue suction assembly is located at the upper end of the valve body and is used to cooperate with the glue storage channel to suck or extrude glue.

[0007] The dispensing valve block is provided with a lower glue channel communicating with the glue transfer valve assembly. The dispensing valve block is provided with two rows of dispensing holes along a first direction, and the dispensing holes correspond to the lower glue channel.

[0008] Further, the glue-transfer valve assembly includes a valve shaft, which is installed at the connection of the dispensing valve block, the glue-transfer valve assembly and the glue-sucking assembly inside the valve body and is used to switch the connection of the internal channels.

[0009] Further, the glue-transfer valve assembly further includes a conversion sleeve. One end of the conversion sleeve is fixedly connected to the valve body, and the other end of the conversion sleeve is rotatably connected to the valve shaft.

[0010] Further, the conversion sleeve is provided with a glue inlet channel, a glue outlet channel and a glue-sucking channel. The conversion sleeve is further provided with a conversion groove for installing the valve shaft. The valve shaft is rotatably connected to the inner wall of the conversion groove, and the valve shaft is used to connect the glue inlet channel, the glue outlet channel and the glue-sucking channel.

[0011] Further, on one side of the dispensing valve block close to the valve body, there are a plurality of glue guide grooves. One ends of the plurality of glue guide grooves are respectively communicated with a plurality of dispensing holes, and the other ends of the plurality of glue guide grooves are located on the same axis.

[0012] Further, a limiting boss is provided on the inner wall of the conversion groove, and a limiting platform is provided on the conversion sleeve. The limiting platform and the limiting boss cooperate to limit the rotation of the conversion sleeve.

[0013] Further, the glue-sucking channels are distributed in a row along the first direction, and there are multiple rows of glue storage channels. The multiple rows of glue storage channels correspond to the glue-sucking channels.

[0014] Further, sealing rings are provided on both sides in the length direction of the conversion sleeve.

[0015] Further, the glue-sucking assembly includes a plunger seat and a plunger rod fixedly connected to the plunger seat. The plunger rod is in close fit with the inner wall of the glue storage channel. When the glue storage channel is communicated with the glue inlet channel, the plunger rod reciprocates along the direction of the glue storage channel.

[0016] Further, it further includes a connecting seat, and an exhaust hole is provided on the connecting seat.

[0017] Beneficial effects:

[0018] A multi-head dispensing valve of the present utility model includes a glue storage channel, a dispensing valve block, a glue-transfer valve assembly and a glue-sucking assembly. The glue storage channel is used to store glue. The dispensing valve block is arranged at the lower end of the valve body and is used to complete the dispensing operation. The glue-transfer valve assembly is located between the glue-sucking assembly and the dispensing valve block and is responsible for transferring the glue from the glue-sucking assembly to the dispensing valve block, while the glue-sucking assembly is located at the upper end of the valve body and is used to suck the glue from the glue storage channel;

[0019] In this embodiment, multiple groups of dispensing holes are designed in the dispensing valve block. Each group of dispensing channels corresponds to at least two groups of dispensing holes, so that multiple points of simultaneous dispensing can be performed in the same operation cycle. Compared with the traditional single-head dispensing solution, this multi-head dispensing design improves the dispensing efficiency. It is particularly suitable for production environments that require a large number of dispensing operations, and can significantly improve the work efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded view of a multi-head dispensing valve according to an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of a multi-head dispensing valve according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the hidden components of a multi-head dispensing valve according to an embodiment of the utility model;

[0023] Figure 4 It is a partial schematic diagram of a transfer valve assembly of a multi-head dispensing valve according to an embodiment of the utility model;

[0024] Figure 5 It is a cross-sectional view of a multi-head dispensing valve according to an embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of a dispensing valve block of a multi-head dispensing valve according to an embodiment of the utility model;

[0026] Figure 7 It is a schematic diagram of a limiting platform and a limiting boss of a multi-head dispensing valve according to an embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of a limiting boss of a multi-head dispensing valve according to an embodiment of the utility model;

[0028] Figure 9 It is a schematic diagram of a conversion sleeve of a multi-head dispensing valve according to an embodiment of the utility model;

[0029] in:

[0030] 1. Valve body; 11. Glue storage channel;

[0031] 2. Glue transfer valve assembly; 21. conversion sleeve; 211. glue inlet channel; 212. glue outlet channel; 213. glue suction channel; 214. conversion slot;

[0032] 3. Glue dispensing valve block; 31. Glue guide groove; 32. Glue dispensing channel;

[0033] 4. Valve shaft; 41. Colloid port; 42. Glue outlet port for transfer; 43. Glue inlet port for transfer;

[0034] 5. Sealing ring;

[0035] 6. Glue suction assembly; 61. Plunger seat; 62. Plunger rod;

[0036] 7. Connecting seat; 71. Exhaust hole;

[0037] 8. Limiting platform;

[0038] 9. Limiting boss;

[0039] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0040] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0041] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection, a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] Referring to Figures 1 to 9 , in an embodiment of the utility model, a multi-head dispensing valve includes a valve body 1. A glue storage channel 11, a dispensing valve block 3, a glue transfer valve assembly 2 and a glue suction assembly 6 are provided on the valve body 1. The glue storage channel 11 is used for storing glue. The dispensing valve block 3 is arranged at the lower end of the valve body 1. The glue transfer valve assembly 2 is arranged between the glue suction assembly 6 and the dispensing valve block 3 and is used for switching the connection between the glue storage channel 11 and the dispensing valve block 3 or an external tank body. The glue suction assembly 6 is located at the upper end of the valve body 1 and is used for cooperating with the glue storage channel 11 to suck or extrude glue.

[0045] The dispensing valve block 3 is provided with a glue discharging channel 32 communicating with the glue transfer valve assembly 2. The dispensing valve block 3 is provided with two rows of dispensing holes along a first direction, and the dispensing holes correspond to the glue discharging channel 32.

[0046] The glue transfer valve assembly 2 includes a valve shaft 4. The valve shaft 4 is installed at the communication position of the dispensing valve block 3, the glue transfer valve assembly 2 and the glue suction assembly 6 inside the valve body 1 and is used for switching the connection of the internal channels.

[0047] The glue transfer valve assembly 2 further includes a conversion sleeve 21. One end of the conversion sleeve 21 is fixedly connected to the valve body 1, and the other end of the conversion sleeve 21 is rotatably connected to the valve shaft 4.

[0048] The conversion sleeve 21 is provided with a glue inlet channel 211, a glue outlet channel 212 and a glue suction channel 213. The conversion sleeve 21 is further provided with a conversion groove 214 for installing the valve shaft 4. The valve shaft 4 is rotatably connected to the inner wall of the conversion groove 214, and the valve shaft 4 is used for connecting the glue inlet channel 211, the glue outlet channel 212 and the glue suction channel 213.

[0049] A plurality of glue guiding grooves 311 are provided on one side of the dispensing valve block 3 close to the valve body 1. One ends of the plurality of glue guiding grooves 311 are respectively communicated with the plurality of dispensing holes, and the other ends of the plurality of glue guiding grooves 311 are located on the same axis.

[0050] The inner wall of the conversion groove 214 is provided with a limiting boss 9, and the conversion sleeve 21 is provided with a limiting platform 8. The limiting platform 8 and the limiting boss 9 cooperate to limit the rotation of the conversion sleeve 21;

[0051] The glue suction channels 213 are distributed in a row along the first direction, and the glue storage channels 11 are provided with multiple rows. The multiple rows of glue storage channels 11 correspond to the glue suction channels 213.

[0052] The multi-head dispensing valve includes a glue storage channel 11, a dispensing valve block 3, a glue transfer valve assembly 2, and a glue suction assembly 6. The glue storage channel 11 is used to store the glue. The dispensing valve block 3 is arranged at the lower end of the valve body 1 and is used to complete the dispensing operation. The glue transfer valve assembly 2 is located between the glue suction assembly 6 and the dispensing valve block 3 and is responsible for transferring the glue from the glue suction assembly 6 to the dispensing valve block 3. The glue transfer valve assembly 2 includes a conversion sleeve 21. The conversion sleeve 21 is provided with a glue inlet channel 211, a glue outlet channel 212, and a glue suction channel 213. The glue inlet channel 211 is communicated with the glue storage channel 11, the glue outlet channel 212 is communicated with the lower glue channel 32, and the glue suction channel 213 is communicated with the glue suction assembly 6. And at most only two groups of the glue inlet channel 211, the glue outlet channel 212, and the glue suction channel 213 are communicated with each other pairwise. The glue suction assembly 6 is located at the upper end of the valve body 1 and is used to suck the glue from the external glue tank into the glue storage channel 11. In the embodiment of the present application, the glue storage channel 11 is provided with two rows, and the two rows of glue storage channels 11 are communicated with the glue suction channel 213. During the operation, the glue suction assembly 6 is connected to the glue suction channel 213 through two groups of glue storage channels 11, forming two parallel glue suction paths. When the device starts to suck the glue, the two channels work simultaneously, suck the glue from the external glue tank, and transmit it to the glue transfer valve assembly 2 through the glue inlet channel 211. Since the dual channels operate simultaneously, compared with the single-channel design, the glue suction amount can be doubled, ensuring the stability of the glue supply, avoiding the uneven feeding phenomenon of the single-channel glue suction, and thus improving the dispensing quality.

[0053] The valve shaft 4 is installed at the connection of the dispensing valve block 3, the glue transfer valve assembly 2, and the glue suction assembly 6 in the valve body 1. The valve shaft 4 is used to connect the dispensing valve block 3, the glue transfer valve assembly 2, and the glue suction assembly 6 pairwise. The valve shaft 4 is provided with a colloid port 41. The bottom of the valve shaft 4 is provided with a transfer glue outlet hole 42, and the top of the valve shaft 4 is provided with a transfer glue inlet hole 43. When in the glue suction state, the transfer glue inlet hole 43 is communicated with the glue storage channel 11, and the glue storage channel 11 is communicated with the glue inlet channel 211. When in the glue supply state, the transfer glue outlet hole 42 is communicated with the lower glue channel 32.

[0054] The dispensing valve block 3 is arranged at the lower end of the valve body 1. A glue guiding groove 311 is arranged in the length direction of the dispensing valve block 3. The glue guiding groove 311 is used to connect the dispensing hole and the glue outlet channel 212. The design of the glue guiding groove 311 enables the glue material to flow from the glue outlet channel 212 to the lower glue channel 32. Through the guidance of the glue guiding groove 311, the glue material can be more evenly distributed to each lower glue channel 32, ensuring that each dispensing hole can obtain a consistent glue material supply and ensuring the uniformity of dispensing.

[0055] Specifically, one row of glue guiding grooves 311 corresponds to two rows of lower glue channels 32. The lower ends of the lower glue channels 32 correspond to dispensing holes. Among them, there are two rows of dispensing holes. In this embodiment, the dispensing holes are designed to be two rows. The purpose of this design is to improve the dispensing efficiency of the equipment and at the same time ensure its adaptability, enabling it to be compatible with existing old equipment. By setting multiple lower glue channels 32 and connecting each channel to two groups of dispensing holes, the function of simultaneous multi-point dispensing is achieved. This design of multiple rows of dispensing holes not only improves the operation efficiency but also enables the dispensing valve to be installed on existing equipment without large-scale modification, with high adaptability.

[0056] Compared with the traditional single-group dispensing hole design, the configuration of setting the dispensing holes as two groups in this embodiment has significant advantages. The traditional single-head design has low efficiency and is prone to uneven glue material distribution. The design of multiple groups of dispensing holes not only improves the dispensing efficiency but also ensures the even distribution of the glue material. At the same time, this design can be directly installed on old equipment without large-scale equipment modification, thus reducing the upgrade cost.

[0057] In addition, the conversion sleeve 21 is provided with a conversion groove 214. The valve shaft 4 is arranged in the conversion groove 214. The valve shaft 4 is used to connect the glue inlet channel 211, the glue outlet channel 212, and the glue suction channel 213. A limiting boss 9 is arranged on the inner wall of the conversion groove 214, and the conversion sleeve 21 is provided with a limiting platform 8. The limiting platform 8 cooperates with the limiting boss 9. In actual work, the limiting boss 9 is arranged on the inner wall of the conversion groove 214, and the limiting platform 8 is arranged on the conversion sleeve 21. When the conversion sleeve 21 is installed in the valve body 1, the limiting platform 8 and the limiting boss 9 are closely matched. Through the mechanical engagement of these two structures, the conversion sleeve 21 is prevented from moving or rotating during operation. With this design, whether it is the glue inlet, glue outlet, or glue suction operation of the glue material, the conversion sleeve 21 can maintain accurate positioning, ensuring the accurate connection of each channel and guaranteeing the stable operation of the entire dispensing process.

[0058] Among them, in another embodiment, the dispensing holes can be arranged not only in two rows, but also in three rows, four rows, etc. The three-row dispensing holes can further improve the dispensing efficiency while still ensuring the uniformity of the adhesive material, and are suitable for larger-scale production requirements. The three-row dispensing holes can perform synchronous dispensing within a larger range, reducing the movement frequency of the equipment. The four-row dispensing holes are suitable for extremely large-scale assembly line operations and can complete larger batches of dispensing tasks in a shorter time, further improving production efficiency. At the same time, the configuration of multiple rows of dispensing holes also makes the equipment have higher flexibility and scalability.

[0059] The design of multiple groups of dispensing holes in this embodiment is applicable to occasions where precise dispensing needs to be performed on multiple points simultaneously. This design has high compatibility and can be directly installed on existing old equipment without major modification of the equipment, with strong adaptability. It helps operators significantly improve the dispensing efficiency without replacing the entire set of equipment, thereby improving the overall efficiency of the production line.

[0060] The dispensing valve further includes a switching device. A valve shaft 4 is installed in the conversion groove 214. The valve shaft 4 is rotationally connected to the inner wall of the conversion groove 214. The switching device is connected to the valve shaft 4 and is used to rotate the valve shaft 4 to the required angle. In the glue suction working state, the switching device drives the valve shaft 4 to rotate, so that the channel in the valve shaft 4 is communicated with the components in the valve body 1. In this state, the glue inlet channel 211 is communicated with the glue storage channel 11, and the glue suction channel 213 is communicated with the glue suction component 6. The glue material is sucked from the external glue tank into the glue storage channel 11 through the glue suction component 6. After completing one glue application operation, the switching device drives the valve shaft 4 to rotate again, so that the channel in the valve shaft 4 is switched to a new state. At this time, the glue suction component 6 stops sucking glue, and the transfer glue outlet hole 42 is communicated with the glue discharging channel 32. The glue material is evenly guided to the glue discharging channel 32 through the glue guiding groove 311, and then enters the dispensing hole for dispensing operation. In this process, the design of the glue guiding groove 311 ensures the uniformity of the glue material during flow, so that each dispensing hole can obtain a stable and uniform glue material supply, ensuring the stability and consistency of the dispensing process.

[0061] This design ensures that after the glue application, the glue material can be prevented from flowing continuously by switching the channel, thereby avoiding waste of excess glue material. At the same time, the flexible switching function of the valve shaft 4 also ensures that the dispensing valve can adapt to different operation requirements, improving the overall operation flexibility and efficiency.

[0062] Sealing rings 5 are arranged on both sides in the length direction of the conversion sleeve 21.

[0063] In this embodiment, sealing rings 5 are provided on both sides in the length direction of the conversion sleeve 21, aiming to ensure the sealing performance between the valve shaft 4 and the inner wall of the conversion groove 214 through the action of the sealing rings 5. During the dispensing operation, the valve shaft 4 rotates within the conversion groove 214, and the conveying and discharging of the adhesive are achieved by switching different communication ports. The setting of the sealing rings 5 ensures that when the valve shaft 4 rotates, it can still be in close contact with the inner wall of the conversion groove 214, preventing the adhesive from leaking along the side of the valve shaft 4. At the same time, the sealing rings 5 also prevent external air from entering the system, avoiding air bubbles from mixing into the adhesive, thereby maintaining the uniformity of the adhesive and the consistency of dispensing.

[0064] The glue suction assembly 6 includes a plunger seat 61 and a plunger rod 62 fixedly connected to the plunger seat 61. The plunger rod 62 is in close fit with the glue storage channel 11. When the glue storage channel 11 is communicated with the glue inlet channel 211, the plunger rod 62 moves along the direction of the glue storage channel 11.

[0065] In this embodiment, the glue suction assembly 6 includes a plunger seat 61 and a plunger rod 62 fixedly connected to the plunger seat 61, and the plunger rod 62 is connected to the inner wall of the glue storage channel 11. The purpose of this design is to achieve precise suction and conveyance of the adhesive through the movement of the plunger rod 62 in the longitudinal axis direction. At the same time, the connection between the plunger rod 62 and the inner wall of the glue storage channel 11 ensures good sealing performance during the glue suction process, preventing the adhesive from leaking or air from entering, thereby ensuring the efficiency and stability of the glue suction process. When the glue suction assembly 6 is activated, the plunger rod 62 moves along the longitudinal axis direction. By closely connecting with the inner wall of the glue storage channel 11, the adhesive is sucked from the external glue tank and conveyed to the glue conversion valve assembly 2. The movement of the plunger rod 62 is similar to that of a precision piston. Through its sealed cooperation with the channel inner wall, it ensures that each glue suction operation can be precisely completed. At the same time, this design can also reduce resistance during the glue suction process, making the glue suction operation smoother and more efficient.

[0066] The multi-head dispensing valve further includes a connection seat 7, which is connected to the glue conversion valve assembly 2. The connection seat 7 is provided with a through hole connecting the external glue tank and the glue storage channel 11.

[0067] An exhaust hole 71 is provided on the connection seat 7.

[0068] In this embodiment, a connecting seat 7 is provided on the multi-head dispensing valve. The connecting seat 7 is connected to the transfer dispensing valve assembly 2 and is used for the stable installation of an external glue tank. The design of the connecting seat 7 not only provides a stable installation position for the external glue tank, but also has through holes provided thereon. The two ends of the through holes are respectively connected to the external glue tank and the glue inlet channel 211. During the dispensing operation, the glue tank is stably installed on the device through the connecting seat 7. One end of the through hole on the connecting seat 7 is connected to the glue tank, and the other end is connected to the glue inlet channel 211 and the glue storage channel 11, forming a direct glue material conveying channel. The design of the connecting seat 7 plays a role of fixing and supporting.

[0069] In this embodiment, an exhaust hole 71 is provided on the connecting seat 7. This design aims to ensure that during the glue material conveying and dispensing process, the air inside the system can be discharged in time through the setting of the exhaust hole 71, so as to avoid air mixing into the glue material and affecting the uniformity and quality of dispensing. The design of the exhaust hole 71 takes into account the problem of gas accumulation during the glue material conveying process, and maintains the pressure balance inside the system and the fluidity of the glue material through an effective exhaust mechanism.

[0070] When the glue material is conveyed from the glue storage channel 11 to the dispensing hole, air may be entrained or generated inside the system. The exhaust hole 71 on the connecting seat 7 is communicated with the inside of the system, enabling this air to be discharged in time, effectively removing the excess gas, preventing air bubbles from mixing into the glue material, and ensuring the purity and uniformity of the glue material during the dispensing process.

[0071] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A multi-head dispensing valve, comprising a valve body (1), characterized in that, The valve body (1) is provided with a glue storage channel (11), a dispensing valve block (3), a glue transfer valve assembly (2) and a glue suction assembly (6). The glue storage channel (11) is used for storing glue. The dispensing valve block (3) is arranged at the lower end of the valve body (1). The glue transfer valve assembly (2) is arranged between the glue suction assembly (6) and the dispensing valve block (3) and is used for switching the connection between the glue storage channel (11) and the dispensing valve block (3) or an external tank body. The glue suction assembly (6) is located at the upper end of the valve body (1) and is used for cooperating with the glue storage channel (11) to suck or extrude glue. The dispensing valve block (3) is provided with a glue discharging channel (32) communicated with the glue transfer valve assembly (2). The dispensing valve block (3) is provided with two rows of dispensing holes along a first direction, and the dispensing holes correspond to the glue discharging channel (32).

2. The multi-head dispensing valve according to claim 1, characterized in that, The glue transfer valve assembly (2) includes a valve shaft (4). The valve shaft (4) is installed at the connection part of the dispensing valve block (3), the glue transfer valve assembly (2) and the glue suction assembly (6) inside the valve body (1) and is used for switching the connection of internal channels.

3. The multi-head dispensing valve according to claim 2, wherein, The glue transfer valve assembly (2) further includes a conversion sleeve (21). One end of the conversion sleeve (21) is fixedly connected with the valve body (1), and the other end of the conversion sleeve (21) is rotatably connected with the valve shaft (4).

4. The multi-head dispensing valve according to claim 3, characterized in that, The conversion sleeve (21) is provided with a glue inlet channel (211), a glue outlet channel (212) and a glue suction channel (213). The conversion sleeve (21) is further provided with a conversion groove (214) for installing the valve shaft (4). The valve shaft (4) is rotatably connected with the inner wall of the conversion groove (214), and the valve shaft (4) is used for communicating the glue inlet channel (211), the glue outlet channel (212) and the glue suction channel (213).

5. The multi-head dispensing valve according to claim 1, characterized in that, One side of the dispensing valve block (3) close to the valve body (1) is provided with a plurality of glue guiding grooves (311). One ends of the plurality of glue guiding grooves (311) are respectively communicated with the plurality of dispensing holes, and the other ends of the plurality of glue guiding grooves (311) are located on the same axis.

6. The multi-head dispensing valve according to claim 4, characterized in that, The inner wall of the conversion groove (214) is provided with a limiting boss, and the conversion sleeve (21) is provided with a limiting platform. The limiting platform and the limiting boss are cooperated to limit the rotation of the conversion sleeve (21).

7. The multi-head dispensing valve according to claim 4, characterized in that, The glue suction channels (213) are distributed in a row along the first direction, and the glue storage channels (11) are provided with multiple rows. The multiple rows of glue storage channels (11) correspond to the glue suction channels (213).

8. The multi-head dispensing valve according to claim 3, wherein Sealing rings (5) are arranged on both sides in the length direction of the conversion sleeve (21).

9. The multi-head dispensing valve according to claim 4, wherein The glue suction assembly (6) includes a plunger seat (61) and a plunger rod (62) fixedly connected with the plunger seat (61). The plunger rod (62) is closely attached to the inner wall of the glue storage channel (11). When the glue storage channel (11) is communicated with the glue inlet channel (211), the plunger rod (62) reciprocates along the direction of the glue storage channel (11).

10. The multi-head dispensing valve according to claim 8, characterized in that, It further includes a connecting seat (7). The connecting seat (7) is provided with an exhaust hole (71).

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