Low-residue three-way plunger valve

Abstract

The low-residue three-way plunger valve comprises a three-way plunger valve body, the three-way plunger valve body comprises an air cylinder, a valve body and a valve rod, the three-way plunger valve body is integrally divided into an upper layer structure and a lower layer structure, the upper layer structure and the lower layer structure of the three-way plunger valve body are separated by the valve rod, and the air cylinder is installed at the top of the valve rod. The bottom end of the valve rod is connected to the top end of the valve body, and the top of the air cylinder is in threaded connection with a valve rod sensing device. According to the low-residue three-way plunger valve, after product transportation is completed, the interior of the valve cavity can be cleaned, and the residual quantity of products in the valve is reduced. Therefore, the recovery rate is improved, pollution caused when the next batch of products are transported is avoided, and the device is suitable for industries with high product recovery rate, such as paint. The special structure of the valve rod can ensure that the drift diameter of the valve is the same as the inner diameter of a transportation pipeline, and a pipe cleaner can smoothly pass through the valve so as to improve the recovery rate of a whole pipe cleaning system.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe cleaning devices, in particular to a low-residue three-way plunger valve. Background Art

[0002] Pigging technology has been around in various forms since the early 20th century. Today, it's used across a wide range of sectors, industries, and applications handling liquids and powders to recover these products from pipelines, reducing waste and improving the efficiency of manufacturing and production processes. The primary purpose of pigging is to remove or recover residual product that remains in a pipeline after being transported from one point in the production line to another. The three-way plunger valve primarily serves to allow product to enter the transport pipeline through the valve. For pigging systems used in industries with high residual requirements, such as paint, using a three-way plunger valve can reduce product residue within the valve. Furthermore, the unique design of the plunger stem allows the pig to pass smoothly through the valve after product transport is complete.

[0003] Existing pigging systems can achieve recovery rates as high as 99.5%. After a pipeline is pigged and cleaned, the remaining volume is typically less than 0.1%. The remaining 0.4% of product remains in the valve and cannot be discharged. Therefore, when the valve is opened or closed again, the remaining product will flow out again, affecting the purity of the next batch of product. Traditional three-way plunger valves cannot clean the valve cavity, resulting in low recovery rates and the potential for contamination of subsequent products. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present invention aims to provide a low-residue three-way plunger valve to address the problems raised in the above-mentioned background technology. After the product is transported, the present invention can clean the valve cavity to reduce the amount of product residue in the valve, thereby improving the recovery rate and avoiding contamination when transporting the next batch of products.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a low-residue three-way plunger valve, including a three-way plunger valve body, the three-way plunger valve body including a cylinder, a valve body, a valve stem, a valve stem sensing device, a CIP cleaning liquid outlet and an inlet, the three-way plunger valve body as a whole is divided into an upper and lower structure, and the upper structure and the lower structure of the three-way plunger valve body are separated by the valve stem, the cylinder is installed on the top of the valve stem, the bottom end of the valve stem is connected to the top of the valve body, and the top of the cylinder is screwed with a valve stem sensing device.

[0006] Furthermore, a CIP cleaning liquid outlet is provided on one side of the valve body, and an inlet is provided on the other side of the valve body. The interior of the valve body includes an upper valve cavity and a lower valve cavity, and the inlet is used for flowing in materials or CIP cleaning liquid.

[0007] Furthermore, a valve stem seal is inserted into the interior of the upper valve cavity, a valve seat is integrally formed at the bottom of the upper valve cavity, and the valve stem seal is pressed against the surface of the valve seat.

[0008] Furthermore, the CIP cleaning liquid outlet and inlet are both communicated with the interior of the lower valve cavity.

[0009] Furthermore, the central axes of the CIP cleaning liquid outlet and inlet are on the same straight line, and the cylinder and the valve body are separated by a valve stem.

[0010] Furthermore, after the valve stem is extended and pressed downward, the interiors of the upper valve cavity and the lower valve cavity are not communicated with each other.

[0011] Furthermore, the CIP cleaning liquid outlet and inlet are both sealedly connected to an external transport pipeline via flanges, and the diameters of the CIP cleaning liquid outlet and inlet are the same as the diameter of the external transport pipeline.

[0012] Furthermore, the valve stem seal is fixedly installed at the bottom of the valve stem, and the end of the valve stem seal and the surface of the valve seat are both hemispherical structures.

[0013] Beneficial effects of the utility model:

[0014] This low-residue three-way plunger valve can be cleaned after product transportation, reducing the amount of product residue inside the valve. This improves the recovery rate and avoids contamination when transporting the next batch of products. It is suitable for industries with high product recovery rates, such as paint.

[0015] The low-residue three-way plunger valve adopts a special valve stem structure to ensure that the valve diameter is the same as the inner diameter of the transportation pipeline, and the pig can pass through the valve smoothly, thereby improving the recovery rate of the entire pigging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of a low-residue three-way plunger valve of the utility model;

[0017] Figure 2 This is a side view of the three-way plunger valve of the utility model;

[0018] Figure 3 This is an internal cross-sectional view of the three-way plunger valve of the utility model;

[0019] In the figure: 1. Valve stem sensing device; 2. Cylinder; 3. Valve stem; 4. Valve body; 5. CIP cleaning fluid outlet; 6. Inlet; 7. Upper valve chamber; 8. Lower valve chamber; 9. Valve stem seal; 10. Valve seat. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] See also Figures 1 to 3 The utility model provides the following technical solutions: a three-way plunger valve with low residual, which is mainly composed of three parts, namely the normally closed cylinder 2, the valve body 4 and the valve stem 3. The three-way plunger valve body is divided into an upper and lower structure, and the upper and lower structures of the three-way plunger valve body are separated by the valve stem 3.

[0022] Cylinder 2 is mounted on top of valve stem 3, the bottom of which is connected to the top of valve body 4. A valve stem sensing device 1 is threaded onto the top of cylinder 2. A CIP cleaning fluid outlet 5 is defined on one side of valve body 4, and an inlet 6 is defined on the other side. The interior of valve body 4 comprises an upper valve chamber 7 and a lower valve chamber 8. A valve stem seal 9 is inserted into the upper valve chamber 7, and a valve seat 10 is integrally formed at the bottom of the upper valve chamber 7. The valve stem seal 9 presses against the surface of valve seat 10. The inlet is used to allow the flow of materials or CIP cleaning fluid.

[0023] In this embodiment, the structure of the three-way plunger is divided into two layers, an upper layer and an lower layer, which are separated by a piston rod. When the valve stem 3 is pressed down, the upper and lower layers of the valve cavity are not interconnected. Only when the valve stem 3 is raised, the product flows into the transportation pipeline. After the transportation of the product in the pipeline is completed, the valve stem 3 returns to the valve seat 10, and the upper and lower layers of the valve cavity are not interconnected. Then, the tank cleaning nozzle in the tank body sprays out CIP cleaning liquid, which flows into the plunger valve, cleans the upper cavity, and then flows out from the waste outlet.

[0024] After product transportation is complete, the three-way plunger valve in this embodiment can be cleaned inside the valve cavity to reduce the amount of product residue inside the valve, thereby improving the recovery rate and avoiding contamination when transporting the next batch of products. It is suitable for industries with high product recovery rates, such as paint.

[0025] In this embodiment, the three-way plunger valve cavity is divided into two layers, separated by a piston rod. The two standard chucks on the upper layer of the plunger valve are connected to the product tank and the other is the waste outlet, while the two standard chucks on the lower layer are directly connected to the transportation pipeline.

[0026] When the cylinder 2 is not ventilated, the valve stem 3 is tightly attached to the valve seat 10 under the action of the spring, and the upper and lower layers of the cavity are not connected to each other; when air is supplied to the cylinder 2, the valve stem 3 rises and separates from the valve seat 10, and the product flows from the upper cavity into the lower cavity, and then into the transportation pipeline.

[0027] At the same time, the plunger valve has a unique structural design that separates the upper and lower sealing parts. When the valve stem 3 is close to the valve seat 10, the valve diameter is the same as the transportation pipeline diameter, and the pipe cleaning device can pass through the valve smoothly.

[0028] The special structure of the valve stem 3 can ensure that the valve diameter is the same as the inner diameter of the transportation pipeline, and the pig can pass through the valve smoothly, thereby improving the recovery rate of the entire pigging system.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A low-residue three-way plunger valve, comprising a three-way plunger valve body, characterized in that: The three-way plunger valve body comprises a cylinder (2), a valve body (4), a valve stem (3), a valve stem sensing device (1), a CIP cleaning liquid outlet (5) and an inlet (6); the three-way plunger valve body is divided into an upper and lower structure as a whole, and the upper structure and the lower structure of the three-way plunger valve body are separated by the valve stem (3); the cylinder (2) is installed on the top of the valve stem (3); the bottom end of the valve stem (3) is connected to the top of the valve body (4); and the valve stem sensing device (1) is screwed to the top of the cylinder (2).

2. A low-residue three-way plunger valve according to claim 1, characterized in that: A CIP cleaning liquid outlet (5) is provided on one side of the valve body (4), and an inlet (6) is provided on the other side of the valve body (4). The interior of the valve body (4) comprises an upper valve cavity (7) and a lower valve cavity (8), and the inlet (6) is used for the inflow of materials or CIP cleaning liquid.

3. A low-residue three-way plunger valve according to claim 2, characterized in that: A valve stem seal (9) is inserted into the interior of the upper valve cavity (7), a valve seat (10) is integrally formed at the bottom of the upper valve cavity (7), and the valve stem seal (9) is pressed against the surface of the valve seat (10).

4. The low-residue three-way plunger valve according to claim 1, characterized in that: The CIP cleaning liquid outlet (5) and inlet (6) are both communicated with the interior of the lower valve cavity (8).

5. The low-residue three-way plunger valve according to claim 4, characterized in that: The central axes of the CIP cleaning liquid outlet (5) and the inlet (6) are on the same straight line, and the cylinder (2) and the valve body (4) are separated by the valve stem (3).

6. The low-residue three-way plunger valve according to claim 1, characterized in that: After the valve stem (3) is extended and pressed downward, the interiors of the upper valve cavity (7) and the lower valve cavity (8) are not communicated with each other.

7. The low-residue three-way plunger valve according to claim 1, characterized in that: The CIP cleaning liquid outlet (5) and inlet (6) are both sealedly connected to an external transport pipeline via flanges, and the diameters of the CIP cleaning liquid outlet (5) and inlet (6) are the same as the diameter of the external transport pipeline.

8. The low-residue three-way plunger valve according to claim 3, characterized in that: The valve stem seal (9) is fixedly mounted on the bottom of the valve stem (3), and the end of the valve stem seal (9) and the surface of the valve seat (10) both have a hemispherical structure.

Images