High-sealing wear-resistant discharging three-way valve

Abstract

The utility model relates to a high-sealing wear-resistant discharging three-way valve, which belongs to the technical field of valves, and comprises a valve body, an inlet channel, a first outlet channel, a second outlet channel, a valve core and a driving device, the valve body is in a fan-shaped column shape, and the bottom of the valve body is in a fan-shaped cambered surface dead-corner-free structure. The first outlet channel and the second outlet channel are adjacently arranged at the bottom of the valve body, the fan-shaped cylindrical valve element is driven by the valve rod to selectively enable the inlet channel to be communicated with or disconnected from the first outlet channel or the second outlet channel, the arc-shaped sealing face of the valve element is matched with the sealing face of the valve seat in a sealing mode, and the sealing performance and the abrasion resistance are improved. Scrapers on the outer edge of the sealing face of the valve element can remove residual media of the valve seat, particle blocking is prevented, the sealing performance of a sealing pair is guaranteed, limiting blocks are arranged on the inner walls of the two sides of the valve body, and sealing failure or overload of a driving device caused by over-rotation of the valve element is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of valves, and in particular relates to a high-sealing, wear-resistant unloading three-way valve. Background Technology

[0002] Discharge valves are used for material unloading control in industrial production processes. They generally include a valve body, an inlet channel, an outlet channel, and a valve disc. Typically, the valve disc of a discharge valve is a flat type, as disclosed in the Chinese utility model patent document CN216896064U, entitled "A Novel High-Temperature Resistant Three-Way Discharge Valve". The valve body has a rotating shaft with a baffle on it. The rotating shaft is driven to make the baffle rotate within the valve body to open or close the first and second discharge ports. The disadvantage is that the valve disc or baffle and valve seat are prone to wear during long-term use, resulting in a decrease in sealing performance. Furthermore, during the unloading process, impurities in the medium are prone to accumulate at the valve seat sealing surface, further affecting the valve's sealing performance. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by developing a highly sealing and wear-resistant three-way unloading valve that is not prone to impurity accumulation and has strong sealing properties.

[0004] The technical solution of this utility model is as follows:

[0005] A high-sealing, wear-resistant, three-way unloading valve includes a valve body, an inlet channel, a first outlet channel, a second outlet channel, a valve core, and a drive device. The valve body is characterized by: a fan-shaped cylindrical shape; an inlet channel at the upper end of the valve body; an arc-shaped bottom surface; a first and second outlet channels adjacent to each other at the bottom of the valve body; valve seats at the junctions of the first and second outlet channels with the valve body; a valve stem within the valve body cavity; the extensions of the axial virtual center lines of the first and second outlet channels coinciding with the radial radii of the valve stem; one end of the valve stem perpendicularly penetrating the valve body cavity wall and connecting to the drive device; the valve stem rotating within the valve body around its axial center line under the drive device's influence; the valve core is also fan-shaped cylindrical; one end of the valve core is fixedly connected to the valve stem; the valve core sealing surface is an arc-shaped surface that mates with the valve seat sealing surface; the valve core sealing surface and the valve seat sealing surface form a sealing pair; and an arc-shaped baffle is fixedly installed above the outer circular surface of the valve stem near the inlet channel, with both ends of the arc-shaped baffle fixedly connected to the inner wall of the valve body cavity.

[0006] Ideally, a scraper should be provided on the outer edge of the valve core sealing surface.

[0007] Ideally, limit blocks should be provided on the inner walls of both sides of the valve body along the direction of valve core movement.

[0008] The advantages of this utility model compared with the prior art are as follows: Through the structural design of the fan-shaped columnar valve body and valve core, the valve core sealing surface and the valve seat sealing surface slide and seal together, which improves the sealing performance and wear resistance of the sealing pair. The dead-angle-free structure of the fan-shaped columnar valve body reduces material accumulation, which is especially suitable for powder and granular media. An arc-shaped baffle is provided above the valve stem to prevent the direct impact of the medium on the valve stem and thus prevent valve stem wear and extend the service life of the valve stem. A scraper is provided on the outer edge of the valve core sealing surface to scrape off hard particles, further avoiding scratches on the sealing surface and extending the valve life. The setting of the limit block restricts the rotation angle of the valve core and prevents over-rotation from causing sealing failure or overload of the drive device. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0010] Figure 2 This is a cross-sectional view of the present invention.

[0011] Figure 3 This is a schematic diagram of the scraper structure of this utility model.

[0012] Figure 4 This is a schematic diagram of the limiting block structure of this utility model.

[0013] In the diagram: 1. Valve body; 2. Inlet channel; 3. First outlet channel; 4. Second outlet channel; 5. Drive device; 6. Valve stem; 7. Valve core; 8. Valve core sealing surface; 9. Valve seat; 10. Arc-shaped baffle; 11. Scraper; 12. Limit block. Detailed Implementation

[0014] like Figure 1 , Figure 2The diagram illustrates a high-sealing, wear-resistant, three-way unloading valve, comprising a valve body 1, an inlet channel 2, a first outlet channel 3, a second outlet channel 4, a valve core 7, and a drive device 5. The valve body 1 is a fan-shaped column with the inlet channel 2 at its upper end and an arc-shaped bottom. The first outlet channel 3 and the second outlet channel 4 are adjacent to each other at the bottom of the valve body 1. The fan-shaped column structure of the valve body 1 helps reduce material accumulation, lower flow resistance, and improve unloading efficiency. A valve seat 9 is provided at the junction of the first outlet channel 3 and the second outlet channel 4 with the valve body 1. A valve stem 6 is disposed within the cavity of the valve body. The extensions of the axial virtual center lines of the first outlet channel 3 and the second outlet channel 4 intersect on the axial center line of the valve stem 6, and both extensions coincide with the radial radius of the valve stem 6. One end of the valve stem 6 vertically penetrates the cavity wall of the valve body and connects to the drive device 5. The drive device 5 is a hydraulic or pneumatic device. The valve stem 6 drives... Driven by the actuator 5, the valve core 7 rotates along the axial centerline of the valve stem 6 within the valve body 1. The valve core 7 is a fan-shaped column, with one end of the valve core 7 fixedly connected to the valve stem 6. The valve core sealing surface 8 is an arc-shaped surface that mates with the sealing surface of the valve seat 9. The valve core sealing surface 8 and the valve seat 9 sealing surface form a sealing pair. When the valve stem 6 rotates, the valve core 7 rotates accordingly, allowing the inlet channel 2 to selectively connect with either the first outlet channel 3 or the second outlet channel 4. At the same time, it ensures that the sealing pair on the non-connected side remains completely closed. Through the structural design of the fan-shaped column-shaped valve body 1 and the valve core 7, the valve core sealing surface 8 and the valve seat 9 sealing surface slide and seal, improving the sealing performance and wear resistance of the sealing pair. An arc-shaped baffle 10 is fixedly installed above the outer circular surface of the valve stem 6 near the inlet channel 2. The two ends of the arc-shaped baffle 10 are fixedly connected to the inner wall of the valve body cavity. The arc-shaped baffle 10 protects the valve stem 6 from direct erosion by the medium, extending the service life of the valve stem 6.

[0015] like Figure 3 As shown, a scraper 11 is provided on the outer edge of the valve core sealing surface 8. During the rotation of the valve core 7, it can remove the residual medium in the valve seat 9, prevent particles from getting stuck, ensure the sealing performance of the sealing pair, and extend the service life of the valve.

[0016] like Figure 4 As shown, limit blocks 12 are provided on the inner walls of both sides of the valve body 1 along the movement direction of the valve core 7 to limit the rotation angle of the valve core 7 and prevent excessive rotation from causing sealing failure or overload of the drive device 5.

Claims

1. A high sealing wear resistant drain tee valve comprising a valve body (1), an inlet passage (2), a first outlet passage (3), a second outlet passage (4), a spool (7) and a driving device (5), characterized in that: The valve body (1) is a fan-shaped column with an inlet channel (2) at the top and an arc-shaped bottom. A first outlet channel (3) and a second outlet channel (4) are arranged adjacent to each other at the bottom of the valve body (1). A valve seat (9) is provided at the junction of the first outlet channel (3) and the second outlet channel (4) with the valve body (1). A valve stem (6) is provided in the cavity of the valve body. The extension lines of the axial virtual center lines of the first outlet channel (3) and the second outlet channel (4) coincide with the radial radius of the valve stem (6). One end of the valve stem (6) penetrates the valve body vertically. The cavity wall is connected to the drive device (5). The valve stem (6) rotates around the axial center line of the valve stem (6) inside the valve body (1) under the drive of the drive device (5). The valve core (7) is a fan-shaped column. One end of the valve core (7) is fixedly connected to the valve stem (6). The valve core sealing surface (8) is an arc-shaped surface that matches the valve seat sealing surface. The valve core sealing surface (8) and the valve seat sealing surface seal and cooperate to form a sealing pair. An arc-shaped baffle (10) is fixedly installed above the outer circular surface of the valve stem (6) near the inlet channel (2). Both ends of the arc-shaped baffle (10) are fixedly connected to the inner wall of the cavity of the valve body.

2. A high sealing wear resistant trim valve as claimed in claim 1, wherein: A scraper (11) is provided on the outer edge of the valve core sealing surface (8).

3. A high sealing wear resistant trim valve as claimed in claim 2, wherein: Limiting blocks (12) are provided on the inner walls of both sides of the valve body (1) along the movement direction of the valve core (7).

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