Dual servo gear metering dispensing valve

Abstract

This utility model discloses a dual-servo gear metering dispensing valve, which relates to the field of dispensing machine technology. The dual-servo gear metering dispensing valve includes a back plate, on the left side of which a dispensing mechanism is located: a drive assembly, located on the left side of the back plate, providing power to a conveying assembly; a conveying assembly, located below the drive assembly, for conveying the adhesive; and a partition assembly, including a base plate fixedly installed at the bottom of the back plate. A valve body is fixedly installed on the left side of the base plate. Pressure sensors monitor the adhesive pressure at the front of the "L"-shaped pipe below the valve body and at the inlet of the gear metering pump. The monitoring data from the pressure sensor visually displays the pressure of the adhesive inside the conveying pipe. A pressure threshold is set using a microcontroller, PLC controller, or other control equipment, and compared with the monitoring data from the pressure sensor. Dispensing operation is stopped promptly when the pressure exceeds the threshold to prevent uncontrolled overflow of the adhesive due to excessive pressure.

Description

Technical Field

[0001] This utility model relates to the field of dispensing machine technology, specifically to a dual servo gear metering dispensing valve. Background Technology

[0002] A dispensing machine, also known as an adhesive applicator, glue applicator, glue applicator, or glue dispensing machine, is a specialized machine for controlling fluids. It is an automated machine that dispenses or coats fluids onto the surface or interior of a product, enabling three-dimensional or four-dimensional dispensing with precise positioning, accurate glue control, and preventing stringing, leakage, or dripping. Dispensing machines are primarily used in product manufacturing processes to precisely dispense, inject, coat, or drip adhesives, paints, and other liquids onto specific locations on each product. They can be used to create dots, lines, circles, or arcs.

[0003] The existing Chinese utility model patent with publication number CN220310854U discloses a dispensing mechanism, including: a z-axis linear module; a mounting bracket mounted on the output end of the z-axis linear module; a dispensing assembly mounted on the mounting bracket, the dispensing assembly having a dispensing valve with a range of motion of less than or equal to 180°; and a glue cartridge assembly mounted on the mounting bracket, located above the dispensing assembly, the glue cartridge having a glue cartridge connected to the dispensing valve. This utility model uses the z-axis linear module to drive the entire dispensing mechanism to move along the z-axis, and the dispensing assembly drives the dispensing valve to rotate within a range of less than or equal to 180°, allowing the dispensing valve's range of motion to cover the left and right sides of the lens, facilitating dispensing from both sides and making the dispensing mechanism more adaptable.

[0004] The aforementioned dispensing mechanism stores the adhesive in a glue tank and increases the air pressure above the liquid surface in the tank by supplying gas. The adhesive is then delivered using this pressure difference. Because the adhesive has a certain viscosity, this method results in a constant pressure difference between the inside of the glue tank and the outside environment. This leads to excessive pressure inside the pipe after the dispensing process is completed, affecting the sealing. Furthermore, during the next dispensing, when the dispensing valve opens, the adhesive inside will gush out directly due to the pressure difference, resulting in a large amount of adhesive output in the initial stage of the dispensing process, affecting the uniformity of the adhesive line. Moreover, the pressure of the adhesive inside the pipe cannot be detected during the dispensing process, which can easily lead to uncontrolled overflow of the adhesive due to excessive pressure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a dual servo gear metering dispensing valve, which solves the problems of poor dispensing effect and inability to monitor the pressure of the adhesive inside the pipeline.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-servo gear metering dispensing valve includes a back plate, and a dispensing mechanism is provided on the left side of the back plate.

[0007] The drive assembly, located on the left side of the back panel, provides power to the conveyor assembly;

[0008] A conveying assembly, located below the drive assembly, is used to convey the colloid.

[0009] The partition assembly includes a base plate fixedly installed at the bottom of a back panel. A valve body is fixedly installed on the left side of the base plate. A plug is fitted into the bottom of the valve body. A cylinder is fixedly installed on one side of the top of the valve body. A pin is fixedly installed on the movable end of the cylinder. Sealing rings are fitted into both sides of the top of the valve body. A support ring is fitted into the inside of the sealing ring. A connecting seat is fixedly installed on the other side of the top of the valve body. A pressure sensor is fixedly installed above the connecting seat.

[0010] Preferably, the drive assembly includes a base fixedly mounted on one side of the back plate, a speed reducer fixedly mounted above the base, a drive motor fixedly mounted above the speed reducer, and a coupling fixedly mounted below the output shaft of the speed reducer.

[0011] Preferably, the base has an opening at its center for the output shaft of the reducer to pass through, the drive motor shaft is fixedly connected to the power input shaft of the reducer, and the lower part of the coupling is connected to the transmission shaft.

[0012] Preferably, the conveying assembly includes a gear metering pump fixedly installed above the base plate, a drive shaft inserted above the gear metering pump, an oil seal fixedly installed above the gear metering pump, a cap fixedly installed at the top of the oil seal, the near and far ends of the gear metering pump connected to the opening structure on the surface of the base plate, and a rubber ring is provided at the connection point, and the drive shaft passes through the oil seal, oil cup, and cap and is connected to the drive gear inside the gear metering pump.

[0013] Preferably, the surface of the base plate is provided with an opening structure that penetrates the base plate, and the upper end of the opening structure is connected to the output end of the gear metering pump. The interior of the base plate is provided with a pipe structure, and the lower end of the pipe structure is connected to the bottom end of the valve body, and the upper end is connected to the input end of the gear metering pump. The pressure sensor is also installed on the top of the base plate, and the bottom contact is located at the bend of the pipe inside the base plate.

[0014] Preferably, the valve body has a "T"-shaped pipe structure at the top and an "L"-shaped pipe structure at the bottom. The connecting seat has a "U"-shaped pipe structure inside, and the two ends of the pipe inside the connecting seat are respectively connected to one end of the "T"-shaped pipe above the valve body and the top end of the "L"-shaped pipe below. The contact point of the pressure sensor above the connecting seat is located at the bend of the "U"-shaped pipe inside the connecting seat. The ejector pin is located inside the horizontal part of the "T"-shaped pipe above the valve body. The sealing ring and the support ring are installed as a group at the front and rear ends of the horizontal part of the "T"-shaped pipe of the valve body.

[0015] Preferably, a connecting plate is fixedly installed on one side of the back plate, a solenoid valve is fixedly installed on one side of the connecting plate, an adapter is fixedly installed below the bottom plate, and a needle is fixedly installed at the bottom of the adapter.

[0016] Beneficial effects

[0017] This invention provides a dual-servo gear metering dispensing valve. Compared with the prior art, it has the following advantages:

[0018] (1) The dual servo gear metering dispensing valve, through the setting of pressure sensor, the contact of the pressure sensor above the connector is located at the bend of the "U" shaped pipe inside the connector. The pressure sensor is also installed above the base plate, and the bottom contact is located at the bend of the pipe inside the base plate. The pressure sensor monitors the pressure of the colloid at the front of the "L" shaped pipe below the valve body and at the inlet of the gear metering pump. The monitoring data of the pressure sensor can intuitively display the pressure of the colloid inside the conveying pipe. The pressure threshold is set by the control equipment such as single-chip microcomputer and PLC controller, and compared with the monitoring data of the pressure sensor. When the pressure exceeds the threshold, the dispensing operation is stopped in time to prevent the colloid from overflowing out of control due to excessive pressure.

[0019] (2) The dual servo gear metering dispensing valve, through the setting of the gear metering pump, connects the bottom end of the internal pipe structure of the base plate with the bottom end of the "T" shaped pipe structure below the valve body. When the cylinder above the valve body drives the ejector pin to move, and the end of the ejector pin contacts the sealing ring on one side of the connecting seat, the adhesive inside the "T" shaped pipe at the top of the valve body will not be able to enter the connecting seat, cutting off the adhesive supply of the gear metering pump, thereby improving the sealing effect and preventing adhesive from overflowing when the gear metering pump stops after the dispensing process. At the same time, it can reduce the pressure between the solenoid valve and the gear metering pump. This method does not use air pressure for delivery, can seal the adhesive in time, and can prevent the uniformity of the adhesive line from being affected by pressure changes during subsequent dispensing processes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the installation structure of the speed reducer of this utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the oil cup of this utility model;

[0023] Figure 4 This is a schematic diagram of the pressure sensor mounting structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the connection structure between the sealing ring and the support ring of this utility model;

[0025] Figure 6 This is a schematic cross-sectional view of the valve body and connecting seat of this utility model;

[0026] Figure 7 This is a schematic diagram of the connection structure between the base plate and the valve body of this utility model;

[0027] In the diagram: 1. Backplate; 2. Dispensing mechanism; 21. Drive assembly; 211. Base; 212. Reducer; 213. Drive motor; 214. Coupling; 22. Conveying assembly; 221. Gear metering pump; 222. Drive shaft; 223. Oil seal; 224. Oil cup; 225. Cover; 23. Isolation assembly; 231. Base plate; 232. Valve body; 233. Plug; 234. Cylinder; 235. Ejector pin; 236. Sealing ring; 237. Support ring; 238. Connecting seat; 239. Pressure sensor; 24. Connecting plate; 25. Solenoid valve; 26. Adapter; 27. Needle. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-7 This utility model provides a technical solution: a dual servo gear metering dispensing valve, including a back plate 1, and a dispensing mechanism 2 is provided on the left side of the back plate 1.

[0030] The drive assembly 21, located on the left side of the back plate 1, provides power to the conveying assembly 22. The drive assembly 21 includes a base 211 fixedly installed on one side of the back plate 1, a reducer 212 fixedly installed on the top of the base 211, a drive motor 213 fixedly installed on the top of the reducer 212, a coupling 214 fixedly installed below the output shaft of the reducer 212, an opening structure for the output shaft of the reducer 212 to pass through at the center of the base 211, the rotating shaft of the drive motor 213 fixedly connected to the power input shaft of the reducer 212, and the lower part of the coupling 214 connected to the transmission shaft 222.

[0031] Specifically, the back plate 1 can limit the relative positions between the drive assembly 21, the conveying assembly 22, and the partition assembly 23; the base 211 can support the reducer 212; the reducer 212 can reduce the output speed of the drive motor 213 and increase the output torque of the drive motor 213, so that the gear metering pump 221 can operate at high torque; and the coupling 214 can be connected to the drive shaft 222 to transmit power to the drive shaft 222.

[0032] The conveying assembly 22 is located below the drive assembly 21 and is used to convey the colloid. The conveying assembly 22 includes a gear metering pump 221 fixedly installed above the base plate 231. A drive shaft 222 is inserted above the gear metering pump 221. An oil seal 223 is fixedly installed above the gear metering pump 221. A cover 225 is fixedly installed on the top of the oil seal 223. The inlet and outlet ends of the gear metering pump 221 are connected to the opening structure on the surface of the base plate 231, and a rubber ring is provided at the connection. The drive shaft 222 passes through the oil seal 223, the oil cup 224, and the cover 225 and is connected to the drive gear inside the gear metering pump 221.

[0033] Specifically, the gear metering pump 221 can deliver colloid to the adapter 26, the oil seal 223 can seal between the housing of the gear metering pump 221 and the drive shaft 222, the oil cup 224 can store a certain amount of lubricating oil to reduce the friction when the drive shaft 222 rotates, thereby improving the service life of the drive shaft 222, and the cover 225 can seal the upper end of the oil cup 224.

[0034] The partition assembly 23 includes a base plate 231 fixedly installed at the bottom of the back plate 1. A valve body 232 is fixedly installed on the left side of the base plate 231. A plug 233 is fitted into the bottom of the valve body 232. A cylinder 234 is fixedly installed on one side of the top of the valve body 232. A pin 235 is fixedly installed on the movable end of the cylinder 234. Sealing rings 236 are fitted into both sides of the top of the valve body 232. A support ring 237 is fitted into the inside of the sealing ring 236. A connecting seat 238 is fixedly installed on the other side of the top of the valve body 232. A pressure sensor 239 is fixedly installed above the connecting seat 238. An opening structure penetrating the base plate 231 is provided on the surface of the base plate 231, and the upper end of the opening structure is connected to the output end of the gear metering pump 221. A pipe structure is provided inside the base plate 231, and the lower end of the pipe structure of the base plate 231 is connected to the valve body 232. The bottom end is connected to the input end of the gear metering pump 221. The pressure sensor 239 is also installed above the base plate 231, and the bottom contact is located at the bend of the internal pipe of the base plate 231. The top of the valve body 232 is provided with a "T" shaped pipe structure, and the bottom is provided with an "L" shaped pipe structure. The inside of the connecting seat 238 is provided with a "U" shaped pipe structure, and the two ends of the internal pipe of the connecting seat 238 are respectively connected to one end of the "T" shaped pipe above the valve body 232 and the top end of the "L" shaped pipe below. The contact of the pressure sensor 239 above the connecting seat 238 is located at the bend of the "U" shaped pipe inside the connecting seat 238. The ejector pin 235 is located inside the horizontal part of the "T" shaped pipe above the valve body 232. The sealing ring 236 and the support ring 237 are installed as a group at the front and rear ends of the horizontal part of the "T" shaped pipe of the valve body 232.

[0035] Specifically, the base plate 231 restricts the position of the gear metering pump 221 and delivers colloid into the gear metering pump 221 through its internal piping structure. The internal piping structure of the base plate 231 is connected to the bottom end of the "T"-shaped piping structure below the valve body 232. When the cylinder 234 above the valve body 232 drives the ejector pin 235 to move, so that the end of the ejector pin 235 contacts the sealing ring 236 on one side of the connecting seat 238, the colloid inside the "T"-shaped piping at the top of the valve body 232 will be unable to enter the connecting seat 238. The discontinuation of the colloid supply by the gear metering pump 221 improves the sealing effect and prevents colloid overflow when the gear metering pump 221 stops after the dispensing process. It also reduces the pressure between the solenoid valve 25 and the gear metering pump 221. The sealing ring 236 has a "U" shaped cross-section, and the support ring 237 is formed by connecting "V" shaped springs. The support ring 237 is located inside the sealing ring 236 and can increase the relative pressure between the sealing ring 236 and the ejector pin 235 through elasticity to improve the sealing effect.

[0036] A connecting plate 24 is fixedly installed on one side of the back plate 1, a solenoid valve 25 is fixedly installed on one side of the connecting plate 24, an adapter 26 is fixedly installed below the base plate 231, and a needle 27 is fixedly installed at the bottom of the adapter 26.

[0037] Specifically, the connecting plate 24 can restrict the position of the solenoid valve 25. The input end of the solenoid valve 25 is connected to the colloid supply pipeline, and the output end is fixedly connected to the top of the "T"-shaped pipeline structure on the top of the valve body 232. It can cooperate with the gear metering pump 221 and the cylinder 234 to cut off the colloid supply of the adapter 26. The adapter 26 can facilitate the connection between the needle 27 and the pipeline structure inside the base plate 231, so that the gear metering pump 221 can deliver colloid to the needle 27.

[0038] Specifically, the drive motor 213 is model KY130AS0205-15, the reducer 212 is model AF100-008-S2-P2, the gear metering pump 221 is model OR-VFA-(0.15-3.6)CC, the cylinder 234 is model PG-VTM15DS, and the pressure sensor 239 is model HPT-9. In addition, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] During operation, the contact point of the pressure sensor 239 above the connector 238 is located at the bend of the "U"-shaped pipe inside the connector 238. The pressure sensor 239 is also installed above the base plate 231, with its bottom contact point located at the bend of the pipe inside the base plate 231. The pressure sensor 239 monitors the pressure of the colloid at the front of the "L"-shaped pipe below the valve body 232 and before the feed end of the gear metering pump 221. The monitoring data from the pressure sensor 239 can visually display the pressure of the colloid inside the delivery pipe. A pressure threshold is set using a microcontroller, PLC controller, or other control equipment, and compared with the monitoring data from the pressure sensor 239. If the pressure exceeds the threshold, the dispensing operation is stopped in time to prevent the colloid from overflowing uncontrollably due to excessive pressure. In this configuration, the internal pipe structure of the base plate 231 is connected to the bottom end of the "T"-shaped pipe structure below the valve body 232. When the cylinder 234 above the valve body 232 drives the ejector pin 235 to move, so that the end of the ejector pin 235 contacts the sealing ring 236 on one side of the connecting seat 238, the adhesive inside the "T"-shaped pipe at the top of the valve body 232 will not be able to enter the connecting seat 238, cutting off the adhesive supply of the gear metering pump 221, thereby improving the sealing effect and preventing adhesive from overflowing when the gear metering pump 221 stops after the dispensing process is completed. At the same time, it can reduce the pressure between the solenoid valve 25 and the gear metering pump 221. This method does not use air pressure for delivery, can seal the adhesive in time, and can prevent the uniformity of the adhesive line from being affected by pressure changes during subsequent dispensing processes.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-servo gear metering dispensing valve, including a back plate (1), characterized in that: A dispensing mechanism (2) is provided on the left side of the back plate (1): A drive assembly (21), located on the left side of the backplate (1), provides power to the conveying assembly (22); A conveying assembly (22) is disposed below the drive assembly (21) for conveying colloid; The partition assembly (23) includes a base plate (231) fixedly installed at the bottom of the back plate (1). A valve body (232) is fixedly installed on the left side of the base plate (231). A plug (233) is fitted into the bottom of the valve body (232). A cylinder (234) is fixedly installed on one side of the top of the valve body (232). A pin (235) is fixedly installed at the movable end of the cylinder (234). Sealing rings (236) are fitted into both sides of the top of the valve body (232). A support ring (237) is fitted into the inside of the sealing ring (236). A connecting seat (238) is fixedly installed on the other side of the top of the valve body (232). A pressure sensor (239) is fixedly installed above the connecting seat (238).

2. The dual servo gear metering dispensing valve according to claim 1, characterized in that: The drive assembly (21) includes a base (211) fixedly installed on one side of the back plate (1), a reducer (212) fixedly installed above the base (211), a drive motor (213) fixedly installed above the reducer (212), and a coupling (214) fixedly installed below the output shaft of the reducer (212).

3. The dual servo gear metering dispensing valve according to claim 2, characterized in that: The base (211) has an opening structure at its center for the output shaft of the reducer (212) to pass through. The shaft of the drive motor (213) is fixedly connected to the power input shaft of the reducer (212). The lower part of the coupling (214) is connected to the transmission shaft (222).

4. The dual servo gear metering dispensing valve according to claim 1, characterized in that: The conveying assembly (22) includes a gear metering pump (221) fixedly installed above the base plate (231). A drive shaft (222) is inserted above the gear metering pump (221). An oil seal (223) is fixedly installed above the gear metering pump (221). A cover (225) is fixedly installed at the top of the oil seal (223). The inlet and outlet ends of the gear metering pump (221) are connected to the opening structure on the surface of the base plate (231), and a rubber ring is provided at the connection. The drive shaft (222) passes through the oil seal (223), oil cup (224), and cover (225) and is connected to the drive gear inside the gear metering pump (221).

5. The dual servo gear metering dispensing valve according to claim 1, characterized in that: The surface of the base plate (231) is provided with an opening structure that penetrates the base plate (231), and the upper end of the opening structure is connected to the output end of the gear metering pump (221). The interior of the base plate (231) is provided with a pipe structure, and the lower end of the pipe structure of the base plate (231) is connected to the bottom end of the valve body (232), and the upper end is connected to the input end of the gear metering pump (221). The pressure sensor (239) is also installed above the base plate (231), and the bottom contact is located at the bend of the pipe inside the base plate (231).

6. The dual-servo gear metering dispensing valve according to claim 1, characterized in that: The valve body (232) has a "T" shaped pipe structure at the top and an "L" shaped pipe structure at the bottom. The connecting seat (238) has a "U" shaped pipe structure inside. The two ends of the pipe inside the connecting seat (238) are connected to one end of the "T" shaped pipe above the valve body (232) and the top end of the "L" shaped pipe below, respectively. The contact point of the pressure sensor (239) above the connecting seat (238) is located at the bend of the "U" shaped pipe inside the connecting seat (238). The ejector pin (235) is located inside the horizontal part of the "T" shaped pipe above the valve body (232). The sealing ring (236) and the support ring (237) are installed as a group at the front and rear ends of the horizontal part of the "T" shaped pipe of the valve body (232).

7. The dual servo gear metering dispensing valve according to claim 1, characterized in that: A connecting plate (24) is fixedly installed on one side of the back plate (1), a solenoid valve (25) is fixedly installed on one side of the connecting plate (24), an adapter (26) is fixedly installed below the bottom plate (231), and a needle (27) is fixedly installed at the bottom of the adapter (26).

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