Two-component electrically operated dispensing valve

Abstract

This utility model belongs to the field of dispensing technology, specifically a two-component electric dispensing valve, including a valve body and a valve stem. The valve body is equipped with two independent dispensing channels. The inlet of each dispensing channel is formed on the side wall of the valve body, and the outlet of each dispensing channel is formed at the bottom of the valve body. The valve stem is rotatably fitted into the valve body. Parts of the two dispensing channels pass through the valve stem, forming two passages on the valve stem. During the rotation of the valve stem, when the passages on the valve stem begin to align with other parts of the corresponding dispensing channels, the dispensing channels are connected by the valve stem, and the flow rate at the connection point changes with the cross-sectional area at the alignment point. When the side wall of the valve stem blocks the dispensing channels, the dispensing channels are blocked by the valve stem. This invention solves the technical problems of slow response speed, non-adjustable valve body outlet size, and easy occurrence of glue spraying or insufficient glue in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of dispensing technology, specifically a two-component electric dispensing valve. Background Technology

[0002] Existing dispensing valves mostly use pneumatic control, which has a relatively slow response speed and poor dispensing consistency, making it difficult to adapt to high-speed dispensing conditions. Traditional valve body switching and sealing methods such as back suction, impact needle, and inverted cone are affected by the structure, and the opening and closing of the valve will cause volume changes in the dispensing nozzle chamber, resulting in dispensing or missing glue. The traditional valve body dispensing nozzle size is not adjustable, making it difficult to adapt to the changing dispensing conditions. Existing dispensing valve seals mostly use non-metallic seals such as plugs and stacked seals, which have poor seal life under high pressure conditions. Summary of the Invention

[0003] To address the technical problems of slow response speed, non-adjustable valve outlet size, and easy occurrence of glue spraying or insufficient glue in existing dispensing valves, this application proposes a two-component electric dispensing valve, which solves the above-mentioned technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] This utility model provides a two-component electric dispensing valve, comprising: a valve body having two independent dispensing channels, the inlet of each dispensing channel being formed on the side wall of the valve body, and the outlet of each dispensing channel being formed at the bottom of the valve body; and a valve stem rotatably fitted into the valve body, wherein portions of the two dispensing channels pass through the valve stem and form two passageways on the valve stem. During the rotation of the valve stem, when the passageways on the valve stem begin to align with other portions of the corresponding dispensing channels, the dispensing channels are connected by the valve stem, and the flow rate at the connection point changes with the cross-sectional area at the alignment point. When the side wall of the valve stem blocks the dispensing channels, the dispensing channels are blocked by the valve stem.

[0006] Furthermore, a cylindrical groove is formed in the center of the valve body, and the valve stem fits into the cylindrical groove.

[0007] Furthermore, the adhesive channel enters the valve stem along the side wall of the valve body, then exits the valve stem, and extends along the side wall of the valve body to the bottom end of the valve body.

[0008] Furthermore, the passage is an elongated groove formed on the side wall of the valve stem, with the two ends of the elongated groove forming the two ends of the passage, and a sealing ring fitting in the middle section of the elongated groove, the sealing ring being fixed to the inner wall of the valve body.

[0009] Furthermore, the sealing ring is made of a rigid material.

[0010] Furthermore, the two elongated grooves are respectively formed on the two sides of the valve stem that are furthest apart in the radial direction, and the two elongated grooves are staggered in the axial direction of the valve stem.

[0011] Furthermore, an observation channel is formed at the bottom of the cylindrical groove, one end of the observation channel is connected to the cylindrical groove, and the other end of the observation channel extends to the valve body and communicates with the external space.

[0012] Furthermore, a drive device is disposed on the top of the valve body. The drive device includes a servo motor, and a reducer is disposed at the output end of the servo motor. The output shaft of the reducer is connected to the valve stem through a coupling.

[0013] Furthermore, it also includes an inlet body disposed at the front section of the valve body. The inlet body has two independent pre-inlet channels, which are connected to the corresponding inlet channels. Pressure sensors are disposed at the front and rear ends of the pre-inlet channels to sense the pressure of the medium in the pre-inlet channels. The inlet body includes an inlet seat, a flow hole seat, and a back inlet valve seat that are fixedly connected from top to bottom. The inlet of the pre-inlet channel is formed at the top of the inlet seat, and the outlet of the pre-inlet channel is formed on the back inlet valve seat and is connected to the inlet of the inlet channel.

[0014] Furthermore, a liquid outlet seat is connected to the bottom of the valve body, and the outlet of the adhesive flow channel of the valve body is connected to the inlet of the liquid outlet channel in the liquid outlet seat.

[0015] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0016] This utility model discloses a two-component electric dispensing valve with two independent dispensing channels on the valve body. These two channels are controlled by a single valve stem, specifically through the rotation of the valve stem. This rotation is directly actuated, resulting in a faster response time. Furthermore, the rotation does not affect the internal space or air pressure of the valve body, reducing the likelihood of insufficient or excessive dispensing. During the rotation, as the channels on the valve stem align with the corresponding dispensing channels, the dispensing begins to flow. The glue channel is connected by the valve stem, and the flow rate at the connection point changes with the cross-sectional area at the alignment point. In other words, the cross-sectional area when the passage on the valve stem and the glue channel on the valve body are connected can be adjusted by adjusting the rotation angle of the valve stem relative to the valve body. The larger the cross-sectional area, the greater the flow rate of the glue channel, and the larger the glue dot formed after dispensing. This allows the two-component electric dispensing valve of this invention to adjust the dispensing volume to adapt to various dispensing conditions. When the side wall of the valve stem blocks the glue channel, the glue channel is blocked by the valve stem, and no more glue is dispensed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the two-component electric dispensing valve of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the valve body of this utility model;

[0019] Figure 3 This is a schematic diagram of the adhesive delivery channel of this utility model;

[0020] Figure 4 This is a schematic diagram showing the relative positions of the valve stem and valve body of the two-component electric dispensing valve of this utility model under different opening degrees.

[0021] Figure 5 This is a schematic diagram of an adhesive application trajectory that can be achieved by this utility model.

[0022] In this utility model: 1-valve body, 11-adhesive channel, 12-cylindrical groove, 13-sealing ring, 14-observation channel, 15-liquid outlet seat, 151-liquid outlet channel, 16-angle sensor, 17-viewing window; 2-valve stem, 21-passage; 3-drive device, 31-servo motor, 32-reducer; 4-adhesive inlet, 41-adhesive inlet channel, 42-pressure sensor, 43-adhesive inlet seat, 44-flow hole seat, 45-back-inlet valve seat. 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 Figure 1-3 As shown, this utility model provides a two-component electric dispensing valve, including a valve body 1 and a valve stem 2. The valve body 1 is equipped with two independent dispensing channels 11. The inlet of the dispensing channel 11 is formed on the side wall of the valve body 1, and the outlet of the dispensing channel 11 is formed at the bottom of the valve body 1. The valve stem 2 is rotatably fitted inside the valve body 1. Parts of the two dispensing channels 11 pass through the valve stem 2 and form two passages 21 on the valve stem 2. During the rotation of the valve stem 2, when the passages 21 on the valve stem 2 begin to align with the other parts of the corresponding dispensing channels 11, the dispensing channels 11 are connected by the valve stem 2, and the flow rate at the connection point changes with the cross-sectional area at the alignment point. When the side wall of the valve stem 2 blocks the dispensing channels 11, the dispensing channels 11 are blocked by the valve stem 2.

[0025] The two-component electric dispensing valve of this invention can adjust the cross-sectional area when the passage 21 on the valve stem 2 connects with the glue flow channel 11 on the valve body 1 by adjusting the rotation angle of the valve stem 2 relative to the valve body 1. The larger the cross-sectional area, the greater the flow rate of the glue flow channel 11, and the larger the glue dot formed after dispensing. Thus, the two-component electric dispensing valve of this invention can adjust the dispensing volume to adapt to various dispensing conditions, such as... Figure 5 As shown, the amount of adhesive between CD and EF in this adhesive application trajectory differs from that between CE and DF. Traditional methods require switching valves with different flow channels or multiple applications, severely impacting the application speed. Furthermore, multiple applications or valve changes can lead to adhesive layering, affecting performance. This invention, however, can adjust the valve opening angle in real-time according to the required adhesive amount during the application process, completing the application in one continuous motion without layering, significantly improving the application speed. Figure 4 As shown, state a is the state when the dispensing valve is opened to its maximum, state e is the state when the dispensing valve is completely closed, and states b, c, and d are the states where the opening degree of the dispensing valve, i.e. the flow rate, decreases sequentially.

[0026] In one specific embodiment of this utility model, a cylindrical groove 12 is provided in the center of the valve body 1, and the valve stem 2 is rotatably fitted in the cylindrical groove 12.

[0027] Furthermore, the adhesive passage 11 enters the valve stem 2 along the side wall of the valve body 1, then exits the valve stem 2, and extends along the side wall of the valve body 1 all the way to the bottom of the valve body 1.

[0028] Furthermore, the passage 21 is a long strip groove opened on the side wall of the valve stem 2, with the two ends of the long strip groove forming the two ends of the passage 21 respectively, and a sealing ring 13 is fitted on the middle section of the long strip groove, and the sealing ring 13 is fixed on the inner wall of the valve body 1.

[0029] Specifically, the sealing ring 13 is made of a highly wear-resistant hard material, such as ceramic material, and a small gap seal is formed between the valve body 1 and the valve stem 2. The sealing ring 13 does not use traditional seals, can withstand higher valve pressure, and has a longer wear-resistant service life.

[0030] Specifically, two elongated grooves are respectively opened on the two sides of the valve stem 2 at the farthest points in the radial direction, and the two elongated grooves are staggered in the axial direction of the valve stem 2.

[0031] In a preferred embodiment of the present invention, an observation channel 14 is formed at the bottom of the cylindrical groove 12. One end of the observation channel 14 is connected to the cylindrical groove 12, and the other end of the observation channel 14 extends to the outside of the valve body 1 and is connected to the external space. In this way, when a situation occurs inside the valve body 1, the medium inside the valve body 1 will flow out of the valve body 1 through the observation channel 14 to alert the staff.

[0032] In a preferred embodiment of the present invention, a drive device 3 is provided on the top of the valve body 1. The drive device 3 includes a servo motor 31, and a reducer 32 is provided at the output end of the servo motor 31. The output shaft of the reducer 32 is connected to the valve stem 2 through a coupling.

[0033] To coordinate with the movement of the servo motor 31, an angle sensor 16 is installed on the valve body 1, and a detection element for sensing by the angle sensor 16 is installed on the valve stem 2. Furthermore, a viewing window 17 can be installed on the valve body 1 to observe the rotation of the valve stem 2 to confirm the opening and closing and sealing status.

[0034] In a preferred embodiment of this utility model, it further includes an inlet body 4 disposed at the front end of the valve body 1. The inlet body 4 has two independent pre-inlet channels 41 formed on it. The pre-inlet channels 41 are connected to the corresponding inlet channels. Pressure sensors 42 are disposed at the front end and the rear end of the pre-inlet channels 41 to sense the pressure of the medium in the pre-inlet channels 41. The dispensing situation can be predicted by the pressure of the medium in the pre-inlet channels 41. When the pressure is too low, the angle between the valve stem 2 and the valve body 1 can be adjusted to increase the dispensing flow rate. Conversely, when the pressure is too high, the angle between the valve stem 2 and the valve body 1 can be adjusted to decrease the dispensing flow rate. The inlet body 4 includes an inlet seat 43, a flow hole seat 44 and a back inlet valve seat 45, which are fixedly connected from top to bottom. The inlet of the pre-inlet channel 41 is formed at the top of the inlet seat 43, and the outlet of the pre-inlet channel 41 is formed on the back inlet valve seat 45 and is connected to the inlet of the dispensing channel.

[0035] This utility model's two-component electric dispensing valve integrates flow and pressure monitoring systems, enabling real-time detection of the feed pressure. In two-component adhesive coating processes, unstable dispensing pressures of adhesives A and B can affect dispensing accuracy and mixing, severely impacting product coating quality and even posing a risk of failure to cure. Since the valve body 1 is typically connected to a metering pump via a long pipeline, pressure fluctuations are significantly affected by factors such as pipeline expansion. Traditional solutions involve installing a pressure stabilizer to ensure stable dispensing pressure, but these are expensive. This utility model incorporates a pressure sensor 42 installed on the dispensing seat 43 to detect the feed pressure in real-time. Simultaneously, during the coating process, based on the detected pressure, the servo motor 31 can control the rotation of the valve stem 2 in real-time to change the valve opening angle, balancing the difference in dispensing pressure and thus preventing the impact of unstable dispensing pressure on the coating operation.

[0036] In a preferred embodiment of the present invention, the bottom of the valve body 1 is also connected to a liquid outlet seat 15, and the outlet of the glue-carrying channel 11 of the valve body 1 is connected to the inlet of the liquid outlet channel 151 in the liquid outlet seat 15.

[0037] 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 two-component electric dispensing valve, characterized in that, include: The valve body (1) is provided with two independent adhesive channels (11), the inlet of the adhesive channel (11) is formed on the side wall of the valve body (1), and the outlet of the adhesive channel (11) is formed at the bottom of the valve body (1). The valve stem (2) is rotatably fitted inside the valve body (1). Parts of the two adhesive channels (11) pass through the valve stem (2) and form two passageways (21) on the valve stem (2). During the rotation of the valve stem (2), when the passageway (21) on the valve stem (2) begins to align with the other parts of the corresponding adhesive channel (11), the adhesive channel (11) is connected by the valve stem (2), and the flow rate at the connection point changes with the cross-sectional area at the alignment point. When the side wall of the valve stem (2) blocks the adhesive channel (11), the adhesive channel (11) is blocked by the valve stem (2).

2. The two-component electric dispensing valve according to claim 1, characterized in that, A cylindrical groove (12) is provided in the center of the valve body (1), and the valve stem (2) is fitted into the cylindrical groove (12).

3. The two-component electric dispensing valve according to claim 2, characterized in that, The adhesive channel (11) enters the valve stem (2) along the side wall of the valve body (1), then exits the valve stem (2), and extends along the side wall of the valve body (1) to the bottom of the valve body (1).

4. The two-component electric dispensing valve according to claim 3, characterized in that, The passage (21) is a long strip groove opened on the side wall of the valve stem (2). The two ends of the long strip groove are respectively formed as the two ends of the passage (21). A sealing ring (13) is fitted on the middle section of the long strip groove. The sealing ring (13) is fixed on the inner wall of the valve body (1).

5. The two-component electric dispensing valve according to claim 4, characterized in that, The sealing ring (13) is made of a hard material.

6. The two-component electric dispensing valve according to claim 4, characterized in that, The two elongated grooves are respectively opened on the two sides of the valve stem (2) in the radial direction, and the two elongated grooves are staggered in the axial direction of the valve stem (2).

7. The two-component electric dispensing valve according to claim 2, characterized in that, An observation channel (14) is formed at the bottom of the cylindrical groove (12). One end of the observation channel (14) is connected to the cylindrical groove (12), and the other end of the observation channel (14) extends to the outside of the valve body (1) and is connected to the external space.

8. The two-component electric dispensing valve according to claim 1, characterized in that, The top of the valve body (1) is provided with a drive device (3), which includes a servo motor (31). The output end of the servo motor (31) is provided with a reducer (32), and the output shaft of the reducer (32) is connected to the valve stem (2) through a coupling.

9. The two-component electric dispensing valve according to claim 1, characterized in that, It also includes an inlet body (4) disposed at the front end of the valve body (1). The inlet body (4) has two independent pre-inlet channels (41) formed on it. The pre-inlet channels (41) are connected to the corresponding inlet channels. Pressure sensors (42) are disposed at the front end and the rear end of the pre-inlet channels (41) to sense the pressure of the medium in the pre-inlet channels (41). The inlet body (4) includes an inlet seat (43), a flow hole seat (44) and a back inlet valve seat (45) that are fixedly connected from top to bottom. The inlet of the pre-inlet channel (41) is formed at the top of the inlet seat (43). The outlet of the pre-inlet channel (41) is formed on the back inlet valve seat (45) and is connected to the inlet of the inlet channel.

10. The two-component electric dispensing valve according to claim 1, characterized in that, The bottom of the valve body (1) is also connected to a liquid outlet seat (15), and the outlet of the glue flow channel (11) of the valve body (1) is connected to the inlet of the liquid outlet channel (151) in the liquid outlet seat (15).

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