Double-liquid back suction valve

Abstract

The utility model provides a double-liquid back suction valve which comprises a valve body, a fine adjustment nut is arranged on the upper portion of an air cylinder, a continuous air inlet hole is formed in the lower portion of a control air inlet hole, a spring is arranged on the lower portion of a piston, a connecting rod is arranged on the lower portion of a piston rod, and the connecting rod is connected with a sealing plug through a valve rod on the lower portion of the connecting rod. According to the double-liquid back suction valve, the opening and closing positions of the valve can be finely adjusted by rotating the fine adjustment nut, so that accurate control over the medium flow is achieved, when the valve needs to be opened, the air inlet hole is controlled to allow air to flow into the air cylinder, the piston and the piston rod are pushed to move, then the valve is opened, and the valve is opened by adjusting and controlling the size or opening time of the air inlet hole. The flow and pressure of gas can be controlled, so that the opening speed and force of the valve are adjusted, and in the closing process of the valve, the gas inlet hole can be controlled to serve as an exhaust channel to allow gas in the air cylinder to be exhausted so as to ensure that the piston and the piston rod can stably return to the initial positions.

Description

Technical Field

[0001] This utility model relates to the technical field of back suction valve equipment, specifically a dual-liquid back suction valve. Background Technology

[0002] A dual-liquid backflow valve, as the name suggests, is a valve capable of handling two liquids and possessing a backflow function. It is typically used in applications requiring precise control of the liquid ratio and prevention of leakage, such as chemical processing, water treatment, food production, and colloid spraying.

[0003] Because the pressure in the glue chamber changes repeatedly, the pressure becomes unstable or the material supply is insufficient, which can easily lead to glue leakage at the dispensing valve outlet, causing dripping, stringing, and ultimately wasting glue. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a dual-liquid back suction valve, including a valve body, a cylinder at the upper end of the valve body, a fine-adjustment nut at the upper part of the cylinder, control air inlets at the left and right ends of the cylinder side, a continuous air inlet at the lower part of the control air inlets, glue inlets at the left and right ends of the valve body side, a piston inside the cylinder, a spring at the lower part of the piston, a piston rod at the lower part of the spring, a connecting rod at the lower part of the piston rod, the connecting rod being connected to a sealing plug through a lower valve rod, and a glue outlet at the lower part of the valve body.

[0005] Preferably, the cylinder is positioned above the valve body, and the cylinder moves up and down via the internal piston.

[0006] Preferably, the fine-tuning nut is threaded onto the top of the cylinder and is used to adjust the size or position of the fluid channel.

[0007] Preferably, the continuous air inlet is located below the control air inlet. The control air inlet can adjust the gas flow rate entering the dual-liquid backflow valve by controlling the opening and closing degree of the air inlet. The continuous air inlet prevents negative pressure from being generated inside the dual-liquid backflow valve.

[0008] Preferably, the glue inlet is symmetrically located at the left and right ends of the valve body. The glue inlet receives glue from the glue supply system and inputs it into the internal channel of a dual-liquid back suction valve.

[0009] Preferably, the piston and spring are disposed on the inner wall of the cylinder. The piston moves within the cylinder under the action of air pressure or hydraulic pressure, thereby controlling the opening and closing of the valve. The piston can open or close the channel connected to the glue supply system. A piston rod is provided at the lower part of the piston. The piston rod transmits external power to the piston, driving the piston to move within the valve body. When the piston moves within the valve body, it changes the flow path and mixing ratio of the two glues within the valve body, thereby ensuring that the two glues can be mixed evenly and output. When the piston moves under the action of external force, the spring provides a reverse force, allowing the piston to quickly return to its original position after the external force is removed.

[0010] Preferably, the valve stem is located below the connecting rod, which transmits the movement of the piston rod to the valve stem. The sealing plug is installed below the valve stem to prevent glue from leaking from the inside of the valve into the external environment. Beneficial effects

[0011] 1. This dual-liquid backflow valve, by setting a fine-tuning nut, a control air inlet, and a continuous air inlet, allows for fine-tuning of the valve's opening and closing positions by rotating the fine-tuning nut, thereby achieving precise control of the medium flow rate. When the valve needs to be opened, the control air inlet allows gas to flow into the cylinder, pushing the piston and piston rod to move, thus opening the valve. By adjusting the size of the control air inlet or the opening time, the gas flow rate and pressure can be controlled, thereby adjusting the valve opening speed and force. During valve closing, the control air inlet also serves as an exhaust channel, allowing gas in the cylinder to be discharged, ensuring that the piston and piston rod can smoothly return to their initial position. At the same time, the continuous air inlet allows gas to continuously flow into the cylinder during valve movement, thereby maintaining stable pressure in the cylinder and ensuring that the valve maintains a smooth movement trajectory and stable performance during opening and closing. In cases of long-term operation or frequent valve opening and closing, the continuous air inlet can also replenish gas to ensure that there is always enough gas in the cylinder to drive the piston and piston rod.

[0012] 2. This dual-liquid backflow valve comprises a cylinder, piston, spring, piston rod, connecting rod, and valve stem. The cylinder, driven by pneumatic or hydraulic pressure, moves the piston up and down, changing the volume within the cylinder to control the inflow and outflow of the medium. The piston's movement, driven by the cylinder, is connected to the valve stem via the piston rod and connecting rod. The piston rod converts the piston's linear motion into the valve stem's rotation or linear motion, thus opening and closing the valve. Simultaneously, the connecting rod converts the piston's linear motion into the required movement of the valve stem, ensuring synchronous movement between the two. When the piston rod pushes the valve stem, the valve opens or closes accordingly, thus controlling the valve. When the pressure within the cylinder decreases or disappears, the spring pushes the piston back to its initial position, closing the valve. Attached Figure Description

[0013] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0014] Figure 1 This is a three-dimensional structural diagram of a dual-liquid back-suction valve according to the present invention;

[0015] Figure 2 This is a front view schematic diagram of a dual-liquid back-suction valve according to the present invention;

[0016] Figure 3 This is a front view cross-sectional structural diagram of a dual-liquid back-suction valve according to the present invention.

[0017] In the diagram: 1. Valve body; 2. Cylinder; 201. Piston; 202. Spring; 203. Piston rod; 204. Connecting rod; 205. Valve rod; 206. Sealing plug; 3. Fine-tuning nut; 4. Control air inlet; 5. Continuous air inlet; 6. Glue inlet; 7. Glue outlet. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0019] The accompanying drawings in this utility model embodiment: different types of cross-sectional lines in the drawings are not labeled according to national standards, nor do they specify the material requirements of the components. They are used to distinguish the cross-sectional views of the components in the drawings.

[0020] Please see Figure 1-3A dual-liquid backflow valve includes a valve body 1, a cylinder 2 at the upper end of the valve body 1, a fine-tuning nut 3 at the upper part of the cylinder 2, control air inlets 4 at the left and right ends of the sides of the cylinder 2, a continuous air inlet 5 at the lower part of the control air inlets 4, glue inlets 6 at the left and right ends of the sides of the valve body 1, a piston 201 inside the cylinder 2, a spring 202 at the lower part of the piston 201, a piston rod 203 at the lower part of the spring 202, a connecting rod 204 at the lower part of the piston rod 203, and the connecting rod 204 is connected to the sealing plug 206 through the lower valve rod 205. A glue outlet 7 is provided at the lower part of the valve body 1.

[0021] The cylinder 2 is located above the valve body 1, and the cylinder 2 moves up and down through the piston 201 inside it.

[0022] The fine-tuning nut 3 is threaded onto the cylinder 2 and is used to adjust the size or position of the fluid channel.

[0023] The continuous air inlet 5 is located below the control air inlet 4. The control air inlet 4 can adjust the gas flow rate into the dual liquid back suction valve by controlling the opening and closing degree of the air inlet 4. The continuous air inlet 5 prevents negative pressure from being generated inside the dual liquid back suction valve.

[0024] The glue inlet 6 is symmetrically located on the left and right sides of the valve body 1. The glue inlet 6 receives glue from the glue supply system and inputs it into the internal channel of a dual liquid back suction valve.

[0025] The piston 201 and spring 202 are disposed on the inner wall of the cylinder 2. The piston 201 moves within the cylinder 2 under the action of air pressure or hydraulic pressure, thereby controlling the opening and closing of the valve. The piston 201 can open or close the channel connected to the glue supply system. The piston rod 203 is provided at the lower part of the piston 201. The piston rod 203 transmits external power to the piston 201, driving the piston 201 to move within the valve body 1. When the piston 201 moves within the valve body 1, it changes the flow path and mixing ratio of the two glues within the valve body 1, thereby ensuring that the two glues can be mixed evenly and output. When the piston 201 is moved by an external force, the spring 202 provides a reverse force, so that the piston 201 can quickly return to its original position after the external force is removed.

[0026] The valve stem 205 is located below the connecting rod 204. The connecting rod 204 transmits the movement of the piston rod 203 to the valve stem 205. The sealing plug 206 is installed below the valve stem 205 to prevent glue from leaking from the inside of the valve into the external environment.

[0027] In use, by setting the fine-tuning nut 3, controlling the air inlet 4, and the continuous air inlet 5, the opening and closing positions of the valve can be finely adjusted by rotating the fine-tuning nut 3, thereby achieving precise control of the medium flow rate. When the valve needs to be opened, the controlling air inlet 4 allows gas to flow into the cylinder, pushing the piston 201 and piston rod 203 to move, thus opening the valve. By adjusting the size or opening time of the controlling air inlet 4, the gas flow rate and pressure can be controlled, thereby adjusting the valve opening speed and force. During the valve closing process, the controlling air inlet 4 can also serve as an exhaust channel, allowing the gas in the cylinder 2 to be discharged, ensuring that the piston 201 and piston rod 203 can smoothly return to their initial positions. At the same time, the continuous air inlet 5 allows gas to continuously flow into the cylinder 2 during the valve movement, thereby maintaining stable pressure in the cylinder 2 and ensuring that the valve maintains a smooth movement trajectory and stable performance during opening and closing. In addition, in situations where long-term operation or frequent opening and closing of the valve are required, the continuous air inlet 5 can also serve to replenish gas, ensuring that there is always sufficient gas in the cylinder 2. The piston 201 and piston rod 203 are driven by a cylinder 2, piston 201, spring 202, piston rod 203, connecting rod 204, and valve rod 205. Through their coordinated operation, the cylinder 2 is driven by pneumatic or hydraulic pressure to move the piston 201 up and down. This up-and-down movement of the piston 201 changes the volume within the cylinder 2, thereby controlling the inflow and outflow of the medium. The movement of the piston 201 is driven by the cylinder 2, and the piston 201 is connected to the valve rod 205 via the piston rod 203 and connecting rod 204. The piston rod 203 converts the linear motion of the piston 201 into the rotational or linear motion of the valve rod 205, thereby opening and closing the valve. At the same time, the connecting rod 204 converts the linear motion of the piston 201 into the required motion of the valve rod 205 and ensures the synchronous motion between the two. When the piston rod 203 pushes the valve rod 205, the valve will open or close accordingly, thereby controlling the valve. When the pressure in the cylinder 2 decreases or disappears, the spring 202 can push the piston 201 back to its initial position, thereby closing the valve.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A dual-liquid back-suction valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a cylinder (2) at the upper end, a fine-tuning nut (3) at the upper part of the cylinder (2), a control air inlet (4) at the left and right sides of the cylinder (2), a continuous air inlet (5) at the lower part of the control air inlet (4), a glue inlet (6) at the left and right sides of the valve body (1), a piston (201) inside the cylinder (2), a spring (202) at the lower part of the piston (201), a piston rod (203) at the lower part of the spring (202), a connecting rod (204) at the lower part of the piston rod (203), and the connecting rod (204) is connected to the sealing plug (206) through the lower valve rod (205). The valve body (1) is provided with a glue outlet (7) at the lower part.

2. The dual-liquid back-suction valve according to claim 1, characterized in that: The cylinder (2) is located above the valve body (1), and the cylinder (2) moves up and down through the internal piston (201).

3. The dual-liquid back-suction valve according to claim 1, characterized in that: The fine-tuning nut (3) is threaded onto the cylinder (2) and is used to adjust the size or position of the fluid channel.

4. The dual-liquid back-suction valve according to claim 1, characterized in that: The continuous air inlet (5) is located below the control air inlet (4). The control air inlet (4) can adjust the gas flow rate entering a dual-liquid backflow valve by controlling the opening and closing degree of the air inlet (4). The continuous air inlet (5) prevents negative pressure from being generated inside the dual-liquid backflow valve.

5. A dual-liquid back-suction valve according to claim 1, characterized in that: The glue inlet (6) is symmetrically opened on the left and right ends of the side of the valve body (1). The glue inlet (6) receives glue from the glue supply system and inputs it into the internal channel of a dual liquid back suction valve.

6. A dual-liquid back-suction valve according to claim 1, characterized in that: The piston (201) and spring (202) are disposed on the inner wall of the cylinder (2). The piston (201) moves in the cylinder (2) under the action of air pressure or hydraulic pressure, thereby controlling the opening and closing of the valve. The piston (201) can open or close the channel connected to the glue supply system. The piston (201) is provided with a piston rod (203) at the lower part. The piston rod (203) transmits external power to the piston (201) and drives the piston (201) to move in the valve body (1). When the piston (201) moves in the valve body (1), it changes the flow path and mixing ratio of the two glues in the valve body (1), thereby ensuring that the two glues can be mixed evenly and output. When the piston (201) is moved by external force, the spring (202) provides a reverse force so that the piston (201) can quickly return to the original position after the external force is removed.

7. A dual-liquid back-suction valve according to claim 1, characterized in that: The valve stem (205) is located below the connecting rod (204), and the connecting rod (204) transmits the movement of the piston rod (203) to the valve stem (205). The sealing plug (206) is installed below the valve stem (205) to prevent glue from leaking from the inside of the valve into the external environment.

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