Low-residue four-way valve

Abstract

The low-residue four-way valve comprises a valve body, a first inner cavity and a second inner cavity are formed in the valve body from bottom to top, a through hole is formed between the first inner cavity and the second inner cavity, a valve seat is arranged at the top of the through hole, and a valve deck is fixedly installed at the top end of the valve body through a first bolt. The four-way valve is used for reducing the use number of common valves in a complex valve array, so that the valve array is simpler, and meanwhile, the operation of the valve array is simpler; the top of the first inner cavity can be sealed through downward movement of the air cylinder, the piston rod, the valve rod and the valve ball, so that the first inner cavity and the second inner cavity are independent from each other, and the first inner cavity and the first inlet and outlet and the second inner cavity and the second inlet and outlet can convey different types of products respectively. When the valve ball is adjusted upwards, the valve ball is separated from the valve seat, so that the first inner cavity communicates with the second inner cavity, materials conveyed by the second inner cavity can flow into the first inner cavity, and material residues are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of four-way valves, in particular to a low-residue four-way valve. Background Art

[0002] Pigging technology has been around in various forms since the early 20th century. Today, it's used by a wide variety of sectors, industries, and applications handling liquids and powders to recover these materials from pipelines, reduce waste, and improve the efficiency of manufacturing and production processes. The primary purpose of pigging is to remove or recover residual product from the pipes that convey the product within a production line. In its simplest form, a pigging system consists of an elastic projectile (also called a "pig" or "pig ball") with a diameter slightly larger than the pipe being pigged. This projectile is then propelled through the pipeline using water, compressed gas (sterile air, nitrogen, steam), or even the product being processed, to remove or recover high-value products.

[0003] For product pipeline transportation, especially the cross-transportation of multiple products in the pipeline, if ordinary butterfly valves and ball valves are used in the valve array to control the transportation of materials, a large number of valves will be required, and the pipeline layout will become more complicated.

[0004] To this end, the utility model provides a low-residue four-way valve. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a low-residue four-way valve to solve the problems raised in the above-mentioned background technology. The present invention reduces the number of ordinary valves used in a complex valve array by using a four-way valve, making the valve array more streamlined and making the operation of the valve array simpler.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a low-residue four-way valve, comprising a valve body, the interior of the valve body is provided with a first inner cavity and a second inner cavity from bottom to top, a through hole is provided between the first inner cavity and the second inner cavity, a valve seat is provided at the top of the through hole, a valve ball is provided inside the second inner cavity through a driving mechanism, a channel is provided laterally inside the valve ball, a valve stem is fixedly provided inside the valve ball, the driving mechanism comprises a cylinder and a cylinder bracket, a valve stem detection mechanism is provided on the top of the cylinder, and the valve stem detection mechanism comprises a switch bracket and a metal proximity switch.

[0007] Furthermore, a valve cover is fixedly installed on the top of the valve body by a first bolt, a first sealing rubber ring is provided between the top of the valve body and the valve cover, and the first bolt is threadedly installed inside the four corners of the valve cover and the top of the valve body.

[0008] Furthermore, the cylinder is fixedly mounted on the top of the cylinder bracket by a second bolt, the bottom end of the cylinder bracket is fixedly mounted on the top of the valve cover by a second bolt, a valve stem is fixedly provided inside the valve ball, the top end of the valve stem is movably installed inside the valve cover, and a second sealing rubber ring is provided between the bottom end of the valve stem and the inner wall of the valve cover.

[0009] Furthermore, the cylinder is a double-headed cylinder, a piston rod is provided at the inner center position of the cylinder, and two ends of the piston rod are provided at the top and bottom of the cylinder.

[0010] Furthermore, the bottom end of the piston rod is fixedly connected to the top end of the valve stem, and the top end of the piston rod is fixedly provided with an induction metal sheet.

[0011] Furthermore, the switch brackets are symmetrically fixed on both sides of the top of the cylinder, and a metal proximity switch is fixedly provided on the bottom of the inner side of the left switch bracket.

[0012] Furthermore, a metal proximity switch is fixedly provided on the top of the inner side of the switch bracket on the right side, and the induction metal sheet is provided between the metal proximity switches on both sides.

[0013] Furthermore, the first inlet and outlet are symmetrically provided at the front and rear ends of the first inner cavity, and the second inlet and outlet are symmetrically provided at the left and right ends of the second inner cavity. A third sealing rubber ring is provided inside the top and bottom ends of the valve ball. The bottom end of the valve ball is in close contact with the valve seat, and the axis of the channel and the second inlet and outlet are on the same straight line.

[0014] The beneficial effects of the present invention: The present invention is a low-residue four-way valve that reduces the number of ordinary valves used in a complex valve array by using a four-way valve, making the valve array more streamlined and also making the operation of the valve array simpler; the top of the first inner cavity can be closed by moving the cylinder, piston rod, valve stem and valve ball downward, so that the first inner cavity and the second inner cavity are independent of each other, and the first inner cavity and the first inlet and outlet, and the second inner cavity and the second inlet and outlet can respectively convey different types of products; when the valve ball is adjusted upward, the valve ball is separated from the valve seat, so that the first inner cavity and the second inner cavity are connected, and the material conveyed by the second inner cavity can flow into the interior of the first inner cavity, reducing material residue; the valve stem detection mechanisms such as the metal proximity switch, switch bracket and induction metal sheet can detect the state of the valve stem, which is convenient for controlling the four-way valve through PLC. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a low-residue four-way valve of the utility model;

[0016] Figure 2 This is a rear cross-sectional view of a low-residue four-way valve of the utility model;

[0017] Figure 3 This is a valve ball structure diagram of a low-residue four-way valve of the utility model;

[0018] In the figure: 1. Valve body; 2. Valve cover; 3. Cylinder bracket; 4. Cylinder; 5. Valve stem; 6. First inlet and outlet; 7. Second inlet and outlet; 8. First bolt; 9. Second bolt; 10. Switch bracket; 11. Metal proximity switch; 12. Sensing metal sheet; 13. First inner cavity; 14. Second inner cavity; 15. Valve seat; 16. Valve ball; 17. Piston rod; 18. Third sealing rubber ring; 19. Channel. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figures 1 to 3 The utility model provides a technical solution: a low-residue four-way valve, comprising a valve body 1, wherein the interior of the valve body 1 is provided with a first inner cavity 13 and a second inner cavity 14 from bottom to top, a through hole is provided between the first inner cavity 13 and the second inner cavity 14, a valve seat 15 is provided on the top of the through hole, a valve ball 16 is provided inside the second inner cavity 14 through a driving mechanism, a channel 19 is transversely provided inside the valve ball 16, a valve stem 5 is fixedly provided inside the valve ball 16, the driving mechanism comprises a cylinder 4 and a cylinder bracket 3, a valve stem is provided on the top of the cylinder 4 Detection mechanism, the valve stem detection mechanism includes a switch bracket 10 and a metal proximity switch 11, the top of the valve body 1 is fixedly installed with a valve cover 2 by a first bolt 8, and a first sealing rubber ring is arranged between the top of the valve body 1 and the valve cover 2, and the first bolt 8 is screwed and installed inside the four corners of the valve cover 2 and the top of the valve body 1. By adjusting the valve ball 16 downward, the channel 19 is opposite to the second inner cavity 14, and the first inner cavity 13 and the second inner cavity 14 are independent of each other, which is convenient for conveying different materials. The set first sealing rubber ring can improve the sealing between the valve body 1 and the valve cover 2.

[0021] In this embodiment, the cylinder 4 is fixedly mounted on the top of the cylinder bracket 3 by a second bolt 9, and the bottom end of the cylinder bracket 3 is fixedly mounted on the top of the valve cover 2 by a second bolt 9. The valve stem 5 is fixedly arranged inside the valve ball 16, and the top end of the valve stem 5 is movably mounted inside the valve cover 2. A second sealing rubber ring is arranged between the bottom end of the valve stem 5 and the inner wall of the valve cover 2. The cylinder 4 is a double-headed cylinder, and a piston rod 17 is arranged at the inner center position of the cylinder 4. The two ends of the piston rod 17 are arranged at the top and bottom of the cylinder 4. The piston rod 17 can be driven to move up and down by the cylinder 4, which facilitates the lifting and lowering adjustment of the valve ball 16 by the piston rod 17 and the valve stem 5, thereby facilitating the adjustment of the four-way valve. The second sealing rubber ring can increase the sealing between the valve stem 5 and the valve cover 2, thereby improving the sealing of the four-way valve.

[0022] In this embodiment, the bottom end of the piston rod 17 is fixedly connected to the top end of the valve stem 5, and the top end of the piston rod 17 is fixedly provided with an inductive metal sheet 12. The switch bracket 10 is symmetrically fixedly provided on both sides of the top of the cylinder 4. The bottom of the inner side of the left switch bracket 10 is fixedly provided with a metal proximity switch 11, and the top of the inner side of the right switch bracket 10 is fixedly provided with a metal proximity switch 11. The inductive metal sheet 12 is provided between the metal proximity switches 11 on both sides. The lifting and lowering of the piston rod 17 drives the inductive metal sheet 12 to align with the metal proximity switches 11 on both sides, thereby detecting the status of the valve stem 5 and facilitating the control of the four-way valve through PLC.

[0023] In this embodiment, first inlet and outlet 6 are symmetrically provided at the front and rear ends of the first inner cavity 13, and second inlet and outlet 7 are symmetrically provided at the left and right ends of the second inner cavity 14. Third sealing rubber rings 18 are provided inside the top and bottom ends of the valve ball 16. The bottom end of the valve ball 16 is in close contact with the valve seat 15. The channel 19 and the axis of the second inlet and outlet 7 are on the same straight line. The third sealing rubber ring 18 can provide sealing between the valve ball 16 and the valve body 1 and the valve seat 15, which facilitates the complete isolation of the first inner cavity 13 and the second inner cavity 14, and facilitates the transportation of different types of materials through the first inlet and outlet 6 and the second inlet and outlet 7.

[0024] When using the low-residue four-way valve, flanges are provided at the outer ends of the first inlet and outlet 6 and the second inlet and outlet 7, and the four-way valve is fixedly connected to the pipeline of the product conveying system through the flanges. The PLC control cabinet is electrically connected to the metal proximity switch 11, and the cylinder 4 is started. The cylinder 4 drives the piston rod 17 to descend, and the piston rod 17 drives the sensing metal sheet 12 and the valve stem 5 to descend. The valve stem 5 drives the valve ball 16 to move downward inside the valve body 1, and the bottom end of the valve ball 16 fits tightly with the valve seat 15, and the valve ball 16 and the valve body 1 are sealed by the third sealing rubber ring 18 to improve the sealing between the valve ball 16 and the valve body 1, so that the first inner cavity 13 and the second inner cavity 14 are completely independent, which is convenient for passing through the first inner cavity 13 and the first inlet and outlet 6, and the second inner cavity 14 and the second inlet and outlet. 7 transports different types of materials, and at the same time, the sensing metal sheet 12 is opposite to the metal proximity switch 11 on the left, closing the four-way valve. By using the four-way valve, the number of ordinary valves used in the complex valve array can be reduced, making the valve array more streamlined and the operation of the valve array simpler; when cleaning the pipe, the control cylinder 4 drives the piston rod 17 to move upward, and the piston rod 17 drives the valve ball 16 to move upward through the valve stem 5. The bottom of the valve ball 16 is separated from the valve seat 15, so that the first inner cavity 13 and the second inner cavity 14 are connected through the through hole, and the material transported by the second inner cavity 14 can flow into the interior of the first inner cavity 13, reducing material residue; the valve stem detection mechanism such as the metal proximity switch 11, the switch bracket 10 and the sensing metal sheet 12 can detect the state of the valve stem 5, which is convenient for controlling the four-way valve through the PLC.

[0025] 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 four-way valve, comprising a valve body (1), characterized in that: The interior of the valve body (1) is provided with a first inner cavity (13) and a second inner cavity (14) from bottom to top, a through hole is provided between the first inner cavity (13) and the second inner cavity (14), a valve seat (15) is provided on the top of the through hole, a valve ball (16) is provided inside the second inner cavity (14) through a driving mechanism, a channel (19) is provided laterally inside the valve ball (16), the driving mechanism includes a cylinder (4) and a cylinder bracket (3), a valve stem detection mechanism is provided on the top of the cylinder (4), and the valve stem detection mechanism includes a switch bracket (10) and a metal proximity switch (11).

2. A low-residue four-way valve according to claim 1, characterized in that: The top end of the valve body (1) is fixedly mounted with a valve cover (2) via a first bolt (8), a first sealing rubber ring is provided between the top end of the valve body (1) and the valve cover (2), and the first bolt (8) is screwed and mounted inside the four corners of the valve cover (2) and the top end of the valve body (1).

3. The low-residue four-way valve according to claim 1, characterized in that: The cylinder (4) is fixedly mounted on the top of the cylinder bracket (3) by a second bolt (9), and the bottom end of the cylinder bracket (3) is fixedly mounted on the top of the valve cover (2) by a second bolt (9). A valve stem (5) is fixedly arranged inside the valve ball (16), and the top end of the valve stem (5) is movably mounted inside the valve cover (2). A second sealing rubber ring is arranged between the bottom end of the valve stem (5) and the inner wall of the valve cover (2).

4. A low-residue four-way valve according to claim 3, characterized in that: The cylinder (4) is a double-headed cylinder, a piston rod (17) is provided at the inner center position of the cylinder (4), and two ends of the piston rod (17) are provided at the top and bottom of the cylinder (4).

5. The low-residue four-way valve according to claim 4, characterized in that: The bottom end of the piston rod (17) is fixedly connected to the top end of the valve stem (5), and the top end of the piston rod (17) is fixedly provided with an induction metal sheet (12).

6. The low-residue four-way valve according to claim 5, characterized in that: The switch bracket (10) is symmetrically fixed on both sides of the top of the cylinder (4), and a metal proximity switch (11) is fixedly provided on the bottom of the inner side of the left switch bracket (10).

7. The low-residue four-way valve according to claim 6, characterized in that: A metal proximity switch (11) is fixedly provided on the top of the inner side of the switch bracket (10) on the right side, and the inductive metal sheet (12) is provided between the metal proximity switches (11) on both sides.

8. The low-residue four-way valve according to claim 1, characterized in that: The first inlet and outlet (6) are symmetrically provided at the front and rear ends of the first inner cavity (13), and the second inlet and outlet (7) are symmetrically provided at the left and right ends of the second inner cavity (14). A third sealing rubber ring (18) is provided inside the top and bottom ends of the valve ball (16). The bottom end of the valve ball (16) is in close contact with the valve seat (15), and the axis of the channel (19) and the second inlet and outlet (7) are on the same straight line.

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