A biasing type starting vector seal valve

Abstract

The present invention discloses a biasing start vector seal valve, which includes a valve body, a valve plate and a valve shaft. The valve plate is rotatably connected to the valve body. Half of the inner cavity of the valve body in the axial direction is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. A vector sealing ring is embedded in the cylindrical cavity. The inner surface of the vector sealing ring and the hemispherical cavity of the valve body form a spherical cross-section cavity. The radial outer surface of the valve plate is consistent with the spherical cross-section cavity. A sector gear is fixedly connected axially and symmetrically at the center on one side of the valve plate. The driving gear meshing with the sector gear is fixedly connected to the valve shaft. The valve shaft is rotatably connected to the valve body and is offset from the center of the valve plate by a certain distance. In the present invention, the spherical surface of the valve plate is completely and fully self-positioned in contact with the spherical cross-section cavity of the valve body, realizing a complete spherical hard seal, with better sealing effect and better axial bearing capacity; reducing the assembly precision, making it more convenient for the installation of the valve and reducing the installation difficulty; starting with bias, reducing the starting torque, being more labor-saving or reducing the power of the driving motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and particularly relates to a biasing start vector seal valve. Background Art

[0002] At present, there are a wide variety of valves used domestically and internationally, mostly valves with butterfly valves, ball valves, and gate valves as the main structures. Most of these types of valves are large in volume, heavy in mass, have long installation dimensions, poor sealing effects, require large opening and closing torques, require relatively large power for opening and closing using transmission methods such as electric or pneumatic actuators, have short service lives, and conflict with the current specifications and standards of various valve wells, chambers, etc. in the use environment. Often, a large-diameter valve is installed in a small valve well or chamber, or the well or chamber is built after the valve is installed first, which highlights contradictions in later installation, replacement, disassembly, maintenance, and use. Additionally, when a local valve in the pipe network system needs to be replaced or repaired, the main pipe control valve or the main valve needs to be opened and closed to perform the replacement operation. It is not possible to perform point break and point repair (or replacement) operations, resulting in a large loss of human, material, and medium resources, and thus causing the interruption or paralysis of the main pipe or other systems of the pipe network.

[0003] Chinese Patent Application (Application No. 2019112794029) discloses a vector seal valve, which includes a valve body, a valve plate, and a valve shaft. The valve plate is rotatably connected to the valve body through the valve shaft fixedly connected thereto. Half of the inner cavity in the axial direction of the valve body is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. A vector seal ring is embedded in the cylindrical cavity. The inner surface of the vector seal ring and the hemispherical cavity of the valve body form a spherical cross-section cavity. The radial outer surface of the valve plate is consistent with the spherical cross-section cavity. This structure uses direct drive of the valve shaft, with a large driving force. When opening and closing a large valve, a large torque is required. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a biasing start vector seal valve to solve the problems existing in the prior art.

[0005] The technical solution adopted by the present invention is: a biasing start vector seal valve, which includes a valve body, a valve plate, and a valve shaft. The valve plate is rotatably connected to the valve body. Half of the inner cavity in the axial direction of the valve body is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. A vector seal ring is embedded in the cylindrical cavity. The inner surface of the vector seal ring and the hemispherical cavity of the valve body form a spherical cross-section cavity. The radial outer surface of the valve plate is consistent with the spherical cross-section cavity. A sector gear is fixedly connected axially symmetrically at the center on one side of the valve plate. The driving gear meshing with the sector gear is fixedly connected to the valve shaft. The valve shaft is rotatably connected to the valve body and is offset from the center of the valve plate by a certain distance.

[0006] Preferably, the above-mentioned sector gear adopts a toothed ring structure. Two limiting plates are rotatably connected to the upper and lower sides of the driving gear. A limiting pin is arranged at the free ends of the two limiting plates, and the limiting pin is placed inside the ring of the sector gear.

[0007] Preferably, both ends of the above-mentioned sector gear are fixedly connected to the valve plate by two first screws respectively. The first screw passes through the end of the sector gear and is connected to the valve plate for locking, or passes through the valve plate and is connected to the end of the sector gear for locking.

[0008] Preferably, a fixed seat is rotatably connected to the outer end of the above-mentioned valve shaft, and the fixed seat is fixedly connected to the outside of the valve body.

[0009] Preferably, an interference or transition fit is adopted between the above-mentioned vector sealing ring and the valve body.

[0010] Preferably, the other half of the inner cavity of the above-mentioned valve body is a stepped hole structure. A flange is arranged at the outer end of the vector sealing ring. After the vector sealing ring is embedded in the stepped hole structure, the flange is fastened to the valve body by a second screw.

[0011] Preferably, a gap is maintained between the inner end of the above-mentioned vector sealing ring and the inner end of the stepped hole structure, and the gap is not greater than 1 mm.

[0012] Preferably, the inner diameter of the inner cavity of the above-mentioned valve body is greater than 0.025% - 8% of the valve body diameter.

[0013] Preferably, a valve shaft sealing ring is arranged at the connection between the above-mentioned valve shaft and the valve body.

[0014] Preferably, rollers are arranged on the cylindrical surface of the above-mentioned limiting pin.

[0015] During assembly, place the valve plate at the hemispherical cavity inside the valve body, embed the vector sealing ring into the valve body and fix it, limit the sector gear within the two limiting plates on the valve shaft, install a limiting pin and keep it meshed with the driving gear, rotate the valve plate, and fixedly connect the sector gear to the valve plate to complete the installation of the valve.

[0016] The beneficial effects of the present invention: Compared with the prior art, the effects of the present invention are as follows:

[0017] (1) The present invention adopts a gear pair offset drive to open and close the valve plate. The spherical surface of the valve plate is completely and fully self-positioned in contact with the spherical cross-section cavity of the valve body, realizing a complete spherical hard seal, with better sealing effect and better axial bearing capacity; reducing the assembly accuracy, making it more convenient to install the valve, reducing the installation difficulty; offset start, reducing the starting torque, being more labor-saving or reducing the power of the driving motor, and even if the axis of the valve shaft deviates from the axis of the valve plate, a more compact structure can also be achieved;

[0018] (2)For the inner cavity of the valve body with a spherical cross-section, the inner cavity of the valve body is axially divided into two halves (with the inner surface of half of the vector sealing ring acting as one half). The vector sealing ring acts as half of the spherical cavity, enabling the separate machining of the spherical cross-section cavity, thereby reducing the machining difficulty of the inner spherical surface, greatly reducing the machining cost, and making the vector sealing ring easier to machine. The axial pressing of the vector sealing ring also facilitates the adjustment of the radial clearance between the entire spherical cross-section cavity and the spherical cross-section of the valve plate, resulting in better sealing between the two. This valve only involves the main components of the valve body, valve shaft, valve plate, and vector sealing ring, with simple manufacturing requirements. The present invention also has the characteristic of being more convenient for loading and unloading;

[0019] (3)By adopting the setting method of the limiting plate and the limiting pin to limit the sector gear ring, on the one hand, it plays the role of limiting the main gear and the sector gear to always remain meshed, and on the other hand, it also plays the role of limiting the directional rotation of the valve plate;

[0020] (4)When using the fixing method of screw one passing through the sector gear, the use of sealing components is reduced. When using the fixing method of screw one passing through the valve plate, a screw sealing ring and an arc gear ring need to be set at the screw, with less resistance to fluid flow;

[0021] (5)By adopting the interference fit method, the sealing performance and connection reliability between the valve body and the vector sealing ring can be achieved. By adopting the transition fit, it is convenient for installation and can be used in conjunction with the sealing ring to achieve sealing;

[0022] (6)The stepped hole structure facilitates the embedding of the vector sealing ring with a flange structure into the stepped hole structure, further strengthening the connection reliability of the vector sealing ring;

[0023] (7)Setting a gap facilitates the adjustment of the position between the inner spherical cavity surface of the vector sealing ring and the outer spherical surface of the valve plate, resulting in better sealing;

[0024] (8)By adopting the interference or transition fit to fix the vector sealing ring, the connection is reliable. By adopting the crimping method, the installation is convenient, and the outer diameter of the vector sealing ring is larger than the inner hole of the pipeline, which can play an anti-disconnection role and further improve the use safety;

[0025] (9)The structure of the valve body of this valve is thinned, and the flanges of the pipelines on both sides are butt-jointed on both sides of the valve body, making the installation structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the front view structure schematic diagram of the present invention;

[0027] Figure 2 is Figure 1 the A-A cross-sectional structure schematic diagram in (valve plate open state);

[0028] Figure 3 isFigure 1 Schematic diagram of the A-A sectional structure (valve plate closed state);

[0029] Figure 4 is Figure 1 Schematic diagram of the A-A sectional structure (soft-hard combined seal);

[0030] Figure 5 Schematic diagram of the sectional structure of the soft-hard combined seal valve body;

[0031] Figure 6 Schematic diagram of the side view structure of the sector gear (screw is installed through the sector gear);

[0032] Figure 7 Schematic diagram of the front view structure of the sector gear (screw is installed through the sector gear);

[0033] Figure 8 Schematic diagram of the structure at the connection of the limit plate and the limit pin. Specific implementation manners

[0034] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0035] The meaning of vector seal in this application: It is a way to achieve the sealing performance requirements through the natural mutual variables between surfaces (contacts) by using the physical properties and forms of substances.

[0036] Embodiment 1: As Figure 1-8 shown, a biasing start vector seal valve includes a valve body 1, a valve plate 2 and a valve shaft 3. The valve plate 2 is rotatably connected to the valve body 1. Half of the inner cavity of the valve body 1 in the axial direction is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. A vector seal ring 4 is embedded in the cylindrical cavity. The inner surface of the vector seal ring 4 and the hemispherical cavity of the valve body 1 form a spherical cross-section cavity. The radial outer surface of the valve plate 2 is consistent with the spherical cross-section cavity. A sector gear 5 is axially fixedly connected symmetrically at the center of one side of the valve plate 2. A driving gear 6 that meshes with the sector gear 5 is fixedly connected to the valve shaft 3. The valve shaft 3 is rotatably connected to the valve body 1 and is offset from the center of the valve plate 2 by a certain distance (the axis of the valve shaft intersects the axis of the valve plate or the axis of the valve shaft deviates from the axis of the valve plate, which can also make the structure more compact).

[0037] Preferably, the above-mentioned sector gear 5 adopts a toothed ring structure. The sector gear and the driving gear adopt internal meshing or external meshing. Two limit plates 7 are rotatably connected to the upper and lower sides of the driving gear 6. Limit pins 8 are provided at the free ends of the two limit plates 7. The limit pins 8 are placed inside the ring of the sector gear 5. By using the limit plate and the limit pin, on the one hand, it plays a role in limiting the meshing between the driving gear and the sector gear to always remain engaged, and on the other hand, it also plays a role in limiting the directional rotation of the valve plate.

[0038] Preferably, both ends of the above-mentioned sector gear 5 are fixedly connected to the valve plate 2 through two first screws 9. The first screw 9 passes through the end of the sector gear 5 and is connected to the valve plate 2 for locking or passes through the valve plate 2 and is connected to the end of the sector gear 5 for locking. When the first screw passes through the sector gear for fixation, the use of sealing components is reduced. When the first screw passes through the valve plate for fixation, a screw sealing ring 13 needs to be provided at the screw. The arc-shaped tooth ring has low resistance to fluid flow.

[0039] Preferably, a fixed seat 12 is rotatably connected to the outer end of the above-mentioned valve shaft 3, and the fixed seat 12 is fixedly connected to the outside of the valve body 1, which is convenient for the stable connection of the valve shaft.

[0040] Preferably, an interference or transition fit is adopted between the above-mentioned vector sealing ring 4 and the valve body 1.

[0041] Preferably, the other half of the inner cavity of the above-mentioned valve body 1 is a stepped hole structure. A flange 10 is provided at the outer end of the vector sealing ring 4. After the vector sealing ring 4 is embedded in the stepped hole structure, the flange 10 is fastened to the valve body 1 by a second screw 17.

[0042] Preferably, a gap is maintained between the inner end of the above-mentioned vector sealing ring 4 and the inner end of the stepped hole structure, and the gap is not greater than 1 mm, which is convenient for adjusting the position between the inner spherical cavity surface of the vector sealing ring and the outer spherical surface of the valve plate, resulting in better sealing performance.

[0043] Preferably, the inner cavity diameter of the above-mentioned valve body 1 is greater than 0.025% - 8% of the caliber of the valve body 1. When it can bear the axial force of the valve plate, it meets the requirement of thinning the valve body and is lighter in weight.

[0044] Preferably, a valve shaft sealing ring 11 is provided at the connection between the above-mentioned valve shaft 3 and the valve body 1.

[0045] Preferably, rollers are provided on the cylindrical surface of the above-mentioned limit pin 8.

[0046] Preferably, concave conical surfaces are provided on both the back water side and the inlet water side of the above-mentioned valve plate, which can increase the cross-sectional ratio of the flow passage, reduce the medium resistance, reduce the weight of the valve plate, increase the load of the valve plate, and have a higher service life.

[0047] An installation flange 14 is provided circumferentially on the valve body 1. The installation flange 14 is on the outside of the valve body near the valve shaft 3, while the spherical cross-section cavity of the valve body is on the other side of the valve body. Multiple through holes 15 are arranged on the installation flange. When installing pipes on both sides of the valve body, the flange plates at the ends of the pipes on both sides are docked to both sides of the installation flange and fixedly connected by bolts. A water stop pad is also provided at the connection of the installation flange.

[0048] Preferably, an annular packing ring 16 is installed between the inner end of the above-mentioned vector sealing ring 4 and the inner end of the hemispherical cavity of the valve body 1. The inner height of the packing ring 16 is higher than the surface of the spherical cross-section cavity. The packing ring elastically contacts the outer surface of the valve plate. Combined with the hard seal of the spherical cross-section cavity, the flexible and hard combined seal of the valve is realized, reducing the manufacturing cost. The inner end of the vector sealing ring 4 has a conical structure one with a smaller inner diameter and a larger outer diameter. The inner end of the hemispherical cavity of the valve body 1 is provided with a conical structure two symmetrical to the conical structure one. The packing ring 16 is squeezed between the conical structure one and the conical structure two. The conical structure plays a role in preventing the packing ring from falling off, limiting and fastening, and guiding the installation of the vector sealing ring 4. As Figure 4 shown, when installing the packing ring, the valve shaft and valve plate are first installed on the valve body, then the packing ring (a circular cross-section annular elastic sealing ring) is embedded into the conical structure at the inner end of the hemispherical cavity, and then the vector sealing ring is embedded into the set position, so as to fasten the packing ring on the spherical cross-section cavity.

[0049] Opening and closing operation of the valve: The valve is driven by the valve shaft to drive the driving gear, and the driving gear drives the valve plate to rotate. The valve plate rotates 90 degrees in the spherical cavity of the valve body to achieve opening and closing. The medium is closed by the interaction of the spherical surface of the valve plate and the valve body 1. The valve plate and the spherical cross-section cavity are hard-sealed or the combined seal after adding a packing ring to stop the flowing medium.

[0050] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A biasing start vector seal valve, comprising a valve body (1), a valve plate (2) and a valve shaft (3). The valve plate (2) is rotatably connected to the valve body (1). Half of the inner cavity of the valve body (1) in the axial direction is arranged as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. A vector sealing ring (4) is embedded in the cylindrical cavity. The inner surface of the vector sealing ring (4) and the hemispherical cavity of the valve body (1) form a spherical cross-section cavity. The radial outer surface of the valve plate (2) is consistent with the spherical cross-section cavity. Characterized in that: On one side of the valve plate (2), a sector gear (5) is axially fixedly connected symmetrically at the center. A driving gear (6) meshing with the sector gear (5) is fixedly connected to the valve shaft (3). The valve shaft (3) is rotatably connected to the valve body (1) and is offset from the center of the valve plate (2) by a certain distance. The sector gear (5) adopts a toothed ring structure. Two limit plates (7) are rotatably connected to the upper and lower sides of the driving gear (6). Limit pins (8) are arranged at the free ends of the two limit plates (7). The limit pins (8) are placed inside the ring of the sector gear (5). The outer end of the valve shaft (3) is rotatably connected to a fixing seat (12), and the fixing seat (12) is fixedly connected to the outside of the valve body (1).

2. A biasing start vector seal valve according to claim 1, Characterized in that: Both ends of the sector gear (5) are respectively fixedly connected to the valve plate (2) by two screws one (9). The screws one (9) pass through the ends of the sector gear (5) and are connected to the valve plate (2) for locking or pass through the valve plate (2) and are connected to the ends of the sector gear (5) for locking.

3. A biasing start vector seal valve according to claim 1, Characterized in that: An interference or transitional fit is adopted between the vector sealing ring (4) and the valve body (1).

4. A biasing start vector seal valve according to claim 1, Characterized in that: The other half of the inner cavity of the valve body (1) is a stepped hole structure. A flange (10) is arranged at the outer end of the vector sealing ring (4). After the vector sealing ring (4) is embedded in the stepped hole structure, the flange (10) is fastened to the valve body (1) by screws two (17).

5. A biasing start vector seal valve according to claim 3, Characterized in that: A gap is maintained between the inner end of the vector sealing ring (4) and the inner end of the stepped hole structure, and the gap is not greater than 1 mm.

6. A biasing start vector seal valve according to claim 1, Characterized in that: The inner diameter of the inner cavity of the valve body (1) is greater than 0.025% - 8% of the caliber of the valve body (1).

7. A biasing start vector seal valve according to claim 1, Characterized in that: A valve shaft sealing ring (11) is arranged at the connection between the valve shaft (3) and the valve body (1).

8. A biasing start vector seal valve according to claim 1, Characterized in that: Rollers are arranged on the cylindrical surface of the limit pin (8).

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