Mechanical seal type high frequency variable point glue valve

Abstract

The utility model belongs to the point gum technical field, concretely is a kind of mechanical seal formula high frequency variable point gum valve, including valve body and valve rod, the bottom end of valve body is formed with liquid outlet passage, the lateral wall of valve body is formed with independent glue inlet passage and cleaning passage, the valve rod is rotatably matched in the valve body, passageway is formed on the valve rod, the import of passageway is formed in the lateral wall of valve rod and is communicated with glue inlet passage or cleaning passage respectively along with the rotation of valve rod, the outlet of passageway is formed in the bottom end of valve rod and is always communicated with liquid outlet passage. Solve the technical problem that the point gum valve of prior art responds slowly, occupies large space, fluid is ejected when switching and is not easy to clean.

Description

Technical Field

[0001] This utility model belongs to the field of dispensing technology, specifically a mechanically sealed high-frequency variable dispensing valve. Background Technology

[0002] Most existing products change the valve state through the linear reciprocating motion of the valve stem. This change in valve state compresses the fluid in the flow channel to some extent, causing the fluid to be squeezed out. The movement of the valve stem in existing products is mostly achieved by the compression and expansion of gas, which causes the piston to move linearly and in turn drives the valve stem. This results in a slow valve opening and closing response. The seals in existing products mostly use seals with certain compression characteristics, which have a limited lifespan. The overall structure of existing rotary valves is mostly horizontal, occupying a large space. Existing valve bodies do not have self-cleaning functions, and most require disassembly for cleaning. When existing products are linked with other mechanisms, there is a large range of time differences between their actions.

[0003] When the valve state of existing products changes, the valve stem squeezes the fluid, causing it to spray out of the valve nozzle; the power source of existing products is mostly gas, resulting in slow valve opening and closing response; the opening and closing of valves in existing products is mostly achieved through the linear reciprocating motion of the valve stem, which reduces the service life of the seals; existing rotary valves occupy a large space, which is not conducive to the coordinated application of adhesive to multiple valve bodies; the cleaning of valve body flow channels is mostly carried out using traditional methods; when existing products are used in conjunction with mechanisms such as triaxial structures for adhesive application, the mutual delay is large, resulting in large errors in the starting and ending positions of adhesive application. Summary of the Invention

[0004] To address the technical problems of existing dispensing valves, such as slow response speed, large space occupation, fluid ejection during opening and closing, and difficulty in cleaning, this application proposes a mechanically sealed high-frequency variable dispensing valve, which solves the above-mentioned technical problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model provides a mechanically sealed high-frequency variable dispensing valve, characterized in that it includes: a valve body, the bottom end of which has a liquid outlet channel, and the side wall of which has an independent glue inlet channel and a cleaning channel; a valve stem, which is rotatably fitted into the valve body, and has a passage formed on the valve stem, the inlet of which is formed on the side wall of the valve stem and communicates with the glue inlet channel or the cleaning channel respectively as the valve stem rotates, and the outlet of which is formed at the bottom end of the valve stem and is always in communication with the liquid outlet channel.

[0007] Furthermore, an annular sealing block is provided at the junction of the valve body and the side wall of the valve stem.

[0008] Furthermore, a lubrication block is provided at the non-connecting part of the side wall of the valve body and the valve stem.

[0009] Furthermore, the bottom end of the valve body is provided with an adhesive outlet block, on which the liquid outlet channel is formed.

[0010] Furthermore, a shaft end buffer plate is provided at the mating point between the bottom end of the valve stem and the dispensing block.

[0011] Furthermore, a drive device is disposed on the top of the valve body. The drive device drives the valve stem through a transition shaft. One end of the transition shaft is connected to the output end of the drive device through a coupling, and the other end of the transition shaft is connected to the valve stem.

[0012] Furthermore, a bearing is provided at the mating point between the outer circumferential surface of the adapter shaft and the valve body.

[0013] Furthermore, the driving device is a servo motor, and a detection block is configured on the adapter shaft, while a sensor paired with the detection block is configured on the valve body.

[0014] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0015] This utility model discloses a mechanically sealed high-frequency variable dispensing valve. The flow channel comprises two parts: one part is disposed on the valve body, including an inlet channel on the side wall and an outlet channel at the bottom; the other part is a passageway disposed on the valve stem. When the valve stem rotates, the dispensing valve is in the open state when the passageway of the valve stem aligns with the inlet channel of the valve body, and in the closed state when the side wall of the valve stem aligns with the inlet channel of the valve body. The switching of the dispensing valve's on / off state relies on the rotation of the valve stem. Only one position for installing the valve stem is needed in the valve body, occupying little space. The opening and closing of the dispensing valve does not involve gas expansion or compression, resulting in a fast response speed. No fluid accumulation occurs during opening and closing, and no fluid is ejected. At the same time, a cleaning channel is also provided on the valve body. When the passageway of the valve stem is aligned with the cleaning channel, the sealing joint between the valve stem and the valve body can be cleaned through the cleaning channel, solving the technical problem that the dispensing valve in the prior art requires disassembly for cleaning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mechanically sealed high-frequency variable dispensing valve of this utility model in the dispensing state.

[0017] Figure 2 This is a schematic diagram of the mechanically sealed high-frequency variable dispensing valve of this utility model in the cleaning state.

[0018] Figure 3 This is a schematic diagram of the adhesive dots in process one;

[0019] Figure 4 This is a schematic diagram of the adhesive dots in process two;

[0020] Figure 5 This is a schematic diagram of the adhesive dots in process three;

[0021] Figure 6 This is a schematic diagram of the adhesive dots in process four.

[0022] In this utility model: 1-valve body, 11-liquid outlet channel, 12-glue inlet channel, 13-cleaning channel, 14-sealing block, 141-sealing seat, 15-lubricating block, 151-lubricating seat, 16-glue outlet block, 17-shaft end buffer plate; 2-valve stem, 21-passage; 3-drive device, 31-transfer shaft, 32-coupling, 33-bearing, 331-bearing support, 34-detection block, 35-sensor. Detailed Implementation

[0023] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] like Figures 1-2 As shown, this utility model provides a mechanically sealed high-frequency variable dispensing valve, including a valve body 1 and a valve stem 2. The bottom end of the valve body 1 forms a liquid outlet channel 11, and the side wall of the valve body 1 forms an independent glue inlet channel 12 and a cleaning channel 13. The valve stem 2 is rotatably fitted inside the valve body 1, and a passage 21 is formed on the valve stem 2. The inlet of the passage 21 is formed on the side wall of the valve stem 2 and communicates with the glue inlet channel 12 or the cleaning channel 13 respectively as the valve stem 2 rotates. The outlet of the passage 21 is formed at the bottom end of the valve stem 2 and is always in communication with the liquid outlet channel 11.

[0025] An annular sealing block 14 is provided at the junction of the valve body 1 and the valve stem 2. The sealing block 14 is made of a hard, wear-resistant material with a long service life, such as ceramic. To better install the sealing block 14, a sealing seat 141 adapted to the shape of the sealing block 14 is provided on the valve body 1.

[0026] This utility model discloses a mechanically sealed high-frequency variable dispensing valve. The flow channel comprises two parts: one part is disposed on the valve body 1, including an inlet channel 12 on the side wall and an outlet channel 11 at the bottom; the other part is a passageway 21 disposed on the valve stem 2. When the valve stem 2 rotates, the dispensing valve is open when the passageway 21 of the valve stem 2 aligns with the inlet channel 12 of the valve body 1, and closed when the side wall of the valve stem 2 aligns with the inlet channel 12 of the valve body 1. The switching of the dispensing valve's on / off state relies on the rotation of the valve stem 2. Only the valve body 1... A space is required to install the valve stem 2. The space occupied is small. The opening and closing of the dispensing valve does not involve gas expansion or compression, and the response speed is fast. There is no fluid accumulation or fluid spraying when opening and closing. At the same time, the valve body 1 is also equipped with a cleaning channel 13. When the passage 21 of the valve stem 2 is aligned with the cleaning channel 13, the sealing joint between the valve stem 2 and the valve body 1 can be cleaned through the cleaning channel 13. The main purpose is to clean the glue that is stuck on the inner surface of the sealing block 14, so as to prevent too much glue on the inner surface of the sealing block 14 from affecting the rotation of the valve stem 2.

[0027] A lubricating block 15 is provided at the non-connecting part of the side wall of the valve body 1 and the valve stem 2. The lubricating block 15 has multiple holes through which lubricating fluid flows. In order to install the lubricating block 15, the part of the valve body 1 where the lubricating block 15 is installed is provided with a corresponding lubricating seat 151.

[0028] The bottom end of the valve body 1 is provided with a dispensing block 16, on which a liquid outlet channel 11 is formed. The dispensing block 16 is screwed to the body of the valve body 1.

[0029] A shaft end buffer plate 17 is provided at the mating point between the bottom end of the valve stem 2 and the dispensing block 16. The shaft end buffer plate 17 can be made of PVDF. The valve stem 2 and the dispensing block 16 are made of metal materials. The shaft end buffer plate 17 made of wear-resistant material can prevent mutual friction between the valve stem 2 and the dispensing block 16 and extend the service life of the dispensing valve.

[0030] The top of the valve body 1 is equipped with a drive device 3, which is a motor, but not limited to a motor. The drive device 3 drives the valve stem 2 through a transition shaft 31. One end of the transition shaft 31 is connected to the output end of the drive device 3 through a coupling 32, and the other end of the transition shaft 31 is connected to the valve stem 2. The drive device 3 and the valve stem 2 are rigidly connected, and the response speed is fast. When applying glue with a robot or a three-axis mechanism, the time difference between the action of the mechanism and the action of the valve body 1 can be greatly shortened.

[0031] A bearing 33 is provided at the mating point between the outer circumferential surface of the adapter shaft 31 and the valve body 1. There are two sets of bearings 33, which are respectively arranged at both ends of the adapter shaft 31. At the same time, in order to ensure the stability of the bearings 33 in the valve body 1, a bearing support 331 is also provided in the valve body 1.

[0032] In a preferred embodiment of this utility model, the drive device 3 is a servo motor. Meanwhile, a detection block 34 is configured on the adapter shaft 31, and the detection block 34 is configured between two bearings 33. A sensor 35 paired with the detection block 34 is configured on the valve body 1. The cooperation of the servo motor, the detection block 34 and the sensor 35 can accurately control the movement of the valve stem 2 to cooperate with various dispensing processes of this dispensing valve.

[0033] The mechanically sealed high-frequency variable dispensing method of this invention can be used to implement the following dispensing process:

[0034] Process 1 involves rotating valve stem 2 at a uniform speed in one direction. The rotational speed and pause time of valve stem 2 are set via drive device 3. Specifically, the rotational speed is changed only when the side wall of valve stem 2 blocks the glue inlet channel 12 to control the time the dispensing valve is closed. The pause time when the passage 21 of valve stem 2 connects to the glue inlet channel 12 of valve body 1 remains unchanged. This allows for dispensing multiple glue dots of the same size but with different intervals, such as... Figure 3 As shown;

[0035] Process 2 is a dispensing process that achieves multiple glue dots of different sizes but with the same spacing, such as... Figure 4 As shown, the modified process can be implemented in two ways. One way is to only change the pause time when the passage 21 of the valve stem 2 is connected to the glue inlet channel 12 of the valve body 1 to control the opening time of the dispensing valve, without changing the rotation speed when the side wall of the valve stem 2 blocks the glue inlet channel 12. The other way is to only change the connection area when the passage 21 of the valve stem 2 is connected to the glue inlet channel 12 of the valve body 1, that is, the opening degree when the dispensing valve is open, without changing the rotation speed when the side wall of the valve stem 2 blocks the glue inlet channel 12, and without changing the pause time when the passage 21 of the valve stem 2 is connected to the glue inlet channel 12 of the valve body 1.

[0036] Process 3: This process involves dispensing multiple adhesive dots of varying sizes and spacing, such as... Figure 5 As shown, this is specifically achieved by adjusting the time the dispensing valve is open, the time the dispensing valve is closed, and the degree of opening when the dispensing valve is open.

[0037] Process four involves creating specially shaped adhesive dots, such as long, thin strips that are narrow at both ends and thick in the middle. Figure 6 As shown, when the passage 21 of the valve stem 2 is connected to the glue inlet channel 12 of the valve body 1, this is achieved by changing the opening degree of the dispensing valve. Specifically, when the valve stem 2 rotates in one direction, the cross-sectional area of ​​the connection between the passage 21 and the glue inlet channel 12 is the smallest at the beginning and end. During this process, the valve stem 2 does not rotate, and thin segments appear at both ends of the glue dot. During this process, when the valve stem 2 rotates, a transition part between the thin and thick segments appears. When the cross-sectional area of ​​the passage 21 and the glue inlet channel 12 is the largest, the valve stem 2 does not rotate, and a thick segment of the glue dot appears.

[0038] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A mechanically sealed high-frequency variable dispensing valve, characterized in that, include: The valve body (1) has a liquid outlet channel (11) at its bottom end and independent glue inlet channel (12) and cleaning channel (13) on its side wall. A valve stem (2) is rotatably fitted inside the valve body (1). A passage (21) is formed on the valve stem (2). The inlet of the passage (21) is formed on the side wall of the valve stem (2) and communicates with the glue inlet channel (12) or the cleaning channel (13) respectively as the valve stem (2) rotates. The outlet of the passage (21) is formed at the bottom end of the valve stem (2) and is always in communication with the liquid outlet channel (11).

2. The mechanically sealed high-frequency variable dispensing valve according to claim 1, characterized in that, An annular sealing block (14) is provided at the junction of the valve body (1) and the valve stem (2) sidewall.

3. The mechanically sealed high-frequency variable dispensing valve according to claim 2, characterized in that, A lubricating block (15) is provided at the non-connecting part of the side wall of the valve body (1) and the valve stem (2).

4. The mechanically sealed high-frequency variable dispensing valve according to claim 1, characterized in that, The bottom end of the valve body (1) is provided with a dispensing block (16), and the dispensing block (16) forms the liquid outlet channel (11).

5. The mechanically sealed high-frequency variable dispensing valve according to claim 4, characterized in that, A shaft end buffer plate (17) is provided at the mating point between the bottom end of the valve stem (2) and the dispensing block (16).

6. The mechanically sealed high-frequency variable dispensing valve according to claim 1, characterized in that, The valve body (1) is provided with a drive device (3) at the top. The drive device (3) drives the valve stem (2) through a transition shaft (31). One end of the transition shaft (31) is connected to the output end of the drive device (3) through a coupling (32), and the other end of the transition shaft (31) is connected to the valve stem (2).

7. The mechanically sealed high-frequency variable dispensing valve according to claim 6, characterized in that, A bearing (33) is provided at the mating point between the outer circumference of the adapter shaft (31) and the valve body (1).

8. The mechanically sealed high-frequency variable dispensing valve according to claim 6, characterized in that, The drive device (3) is a servo motor. Meanwhile, a detection block (34) is arranged on the adapter shaft (31), and a sensor (35) paired with the detection block (34) is arranged on the valve body (1).

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