WO2021114900A1

WO2021114900A1 - Vector sealing valve

Info

Publication number: WO2021114900A1
Application number: PCT/CN2020/123709
Authority: WO
Inventors: 张振民; 颜廷波; 韦俊; 张宗普; 黎正刚; 李险峰
Original assignee: 贵州鼐衡科技有限公司
Priority date: 2019-12-13
Filing date: 2020-10-26
Publication date: 2021-06-17
Also published as: CN110939742A

Abstract

A vector sealing 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) by means of the valve shaft (3) fixedly connected to the valve plate (2); half of an 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 form a spherical section cavity; and the outer side surface of the valve plate (2) in the radial direction is consistent with the spherical section cavity. In the valve, according to a valve body inner cavity of the spherical cavity, the valve body inner cavity is arranged in two halves by means of axial division, the vector sealing ring serves as a half of the spherical cavity, the costs are greatly reduced, and the vector sealing ring is easier to process and is also advantageous in adjusting the sealing performance between the spherical cavity and the radial surface of the valve plate. The valve only relates to the following main components: the valve body, valve shaft, valve plate and vector sealing ring, so that the valve structure is further simplified, the fabrication is simpler, and the assembly and disassembly are more convenient.

Description

A vector seal valve

Technical field

The invention belongs to the technical field of valves, and specifically relates to a vector sealing valve.

Background technique

At present, there are many types of valves used both domestically and internationally, most of which have butterfly valves, ball valves, and gate valves as their main structures and structures. Most of this type of valves are bulky and heavy; the installation size is long; the sealing effect is poor; the opening and closing torque and torque requirements are large; the power required for opening and closing using electric or pneumatic actuators is relatively large; and the service life is greater. It is short, and contradicts the current specifications and standards of various valve wells, chambers and other facilities in the use environment. Often a large-diameter valve is installed in a small valve well or chamber (inside) or the valve is installed first and then the well is built. Room, this is in contradiction with the later installation, replacement, disassembly, maintenance, maintenance and use. In addition, if a certain valve in the pipe network system needs to be replaced or repaired, it is necessary to open and close the main control valve or the main valve to realize the replacement operation. Failure to achieve point-breaking and point-to-point repair (or replacement) operations will result in the loss of a large amount of manpower, material resources, media and other resources, and thus cause the interruption or paralysis of the main pipe network or other systems.

A Chinese patent application (application number 201610012625.9) discloses a valve that includes a valve body, a valve shaft, and a valve plate. The valve plate and valve shaft are connected to the valve body. The surface of the valve plate is provided with a nesting surface. A spherical surface consistent with the inner cavity of the valve is provided. This structure needs to fasten the nest to the valve plate, and needs to use a large number of screws to fasten. The structure is complicated, the cost is high, and the production is difficult.

A Chinese patent application (application number 201710509089.8) discloses a valve that uses thin-walled nesting to be embedded in the valve body cavity to achieve a sealing fit with the valve plate. The thin-walled nesting is difficult to process, the processing accuracy is difficult to control, and the processing cost is high.

Summary of the invention

The technical problem to be solved by the present invention is to provide a vector sealing valve to solve the problems existing in the prior art.

The technical solution adopted by the present invention is: a vector sealing valve, including a valve body, a valve plate and a valve shaft. The valve plate is rotatably connected to the valve body through a valve shaft fixedly connected to the valve body. The cavity is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. The cylindrical cavity is embedded with a vector sealing ring. The inner surface of the vector sealing ring and the hemispherical cavity of the valve body form a spherical section cavity. The radial outer surface of the valve plate is consistent with the spherical section cavity. .

Preferably, a transition or interference fit is adopted between the vector sealing ring and the valve body.

Preferably, the other half of the inner cavity of the valve body has a stepped hole structure, and the outer end of the vector sealing ring is provided with a flange. After the vector sealing ring is embedded in the stepped hole structure, the flange is fastened to the valve body by screws.

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

Preferably, an annular packing ring is installed between the inner end of the stepped hole structure at the inner end of the vector sealing ring and the inner end of the hemispherical cavity of the valve body, and the inner height of the packing ring is higher than the surface of the spherical section cavity.

Preferably, the inner end of the vector seal ring has a conical surface structure with a small inside and a large outside. The inner end of the hemispherical cavity of the valve body is provided with a conical surface structure symmetrical to the conical surface structure. The packing ring is extruded on the conical surface. Between structure one and cone structure two.

Preferably, the diameter of the inner cavity of the valve body is greater than 0.025%-8% of the diameter of the valve body.

Preferably, the above-mentioned vector seal valve further includes an adjustment support pin, the adjustment support pin is arranged on the opposite side of the valve shaft, the inner end of which is a ball head supporting the valve plate, and the outer end is axially movably connected by threads To the valve body, the support valve plate at the ball head support is a spherical groove.

Preferably, a valve shaft sealing ring is provided at the connection between the valve shaft and the valve body.

When assembling, place the valve plate in the hemispherical cavity in the valve body to ensure that the valve shaft hole on the valve plate is facing the valve shaft hole on the valve body. The inner end of the valve shaft is provided with a hexagonal head. With the hexagonal hole on the head, insert the valve shaft through the valve shaft hole on the valve body into the valve shaft hole on the valve plate, thereby connecting the valve plate to the valve shaft, and screw the adjustment support pin into the valve body , Adjust the upper end of the support pin to abut against the spherical groove on the valve plate, insert the vector sealing ring into the valve body and fix it, and complete the installation of the valve.

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

(1) Aiming at the valve inner cavity of the spherical cross-section cavity, the present invention adopts the axial division method to set the valve inner cavity into a two-half structure (half the inner surface of the vector sealing ring serves as), and the vector sealing ring serves as a half spherical cavity, making the spherical cavity The processing of the section cavity reduces the difficulty of processing the inner spherical surface, and the processing cost is greatly reduced. The vector seal ring is also easier to process. The vector seal ring is pressed in axially, which is also convenient for the entire spherical section cavity and the spherical section of the valve plate. The radial clearance adjustment makes the sealing between the two better. The valve only involves the main components of the valve body, valve shaft, valve plate and vector sealing ring. The production requirements are simple. The invention also has the characteristics of more convenient assembly and disassembly. ；

(2) The use of interference fit method can achieve the sealing performance and connection reliability between the valve body and the vector seal ring. The transition fit is used for easy installation and can be used with the seal ring to achieve sealing;

(3) The stepped hole structure is convenient for embedding the vector sealing ring of the flange structure into the stepped hole structure to further strengthen the connection reliability of the vector sealing ring;

(4) The gap is set to facilitate 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, so that the sealing performance is better;

(5) The packing ring can elastically contact the outer surface of the valve plate, and cooperate with the hard seal of the spherical section cavity to realize the flexible and hard combined sealing of the valve, reduce the processing requirements of the spherical section cavity and the spherical surface of the valve plate, and reduce the manufacturing cost. The tapered surface structure plays the role of anti-dropping limit fastening of the packing ring and the installation guide of the vector seal ring;

(6) Adjust the support pin to support the rotation, the ball head and the spherical groove form a point contact, the orientation is better, and the friction is smaller;

(7) The vector sealing ring is fixed by interference or transition fit, the connection is reliable, the crimping method is adopted, and the installation is convenient, and the outer diameter of the vector sealing ring is larger than the inner hole of the pipe, which can prevent falling off and further improve the safety of use;

(8) The valve body of the valve structure is thinner, and the flanges of the pipes on both sides are connected to both sides of the valve body, and the installation structure is more compact.

Description of the drawings

Figure 1 is a schematic front view of the structure of the present invention;

Figure 2 is a schematic diagram of the rear view structure of the present invention;

Figure 3 is a schematic view of the A-A cross-sectional structure of Figure 1 (hard seal);

Figure 4 is a schematic view of the B-B cross-sectional structure of Figure 1 (hard seal);

Figure 5 is a schematic top view of the structure of the present invention (hard seal);

Figure 6 is a schematic view of the bottom structure of the present invention (hard seal);

Figure 7 is a schematic diagram of the valve body structure (hard seal);

Figure 8 is a schematic diagram of the valve plate structure;

Figure 9 is a schematic diagram of the vector seal ring structure (hard seal);

Figure 10 is a schematic view of the A-A cross-sectional structure of Figure 1 (flexible seal);

Figure 11 is a schematic diagram of the B-B cross-sectional structure of Figure 1 (flexible seal);

Figure 12 is a schematic top view of the structure of the present invention (flexible seal);

Figure 13 is a schematic view of the bottom structure of the present invention (flexible seal);

Figure 14 is a schematic diagram of the valve body structure (flexible seal);

Figure 15 is a schematic diagram of the vector seal ring structure (flexible seal).

Detailed ways

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

The meaning of vector sealing in this application: It is a way to achieve the requirements of sealing performance by realizing mutual natural variables between surfaces (contact) through the physical properties and morphology of the material.

Example 1: As shown in Figure 1-9, a rigid-sealed vector-sealed valve includes a valve body 1, a valve plate 2 and a valve shaft 3. The valve plate 2 is rotatably connected by a valve shaft 3 fixedly connected to it On the valve body 1, the axial half of the inner cavity of the valve body 1 is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. The cylindrical cavity is embedded with a vector sealing ring 4, the inner surface of the vector sealing ring 4 and the valve body 1 are hemispherical The cavity constitutes a spherical section cavity, and the radially outer surface of the valve plate 2 is consistent with the spherical section cavity.

Preferably, a transition or interference fit is adopted between the vector sealing ring 4 and the valve body 1.

Preferably, the other half of the inner cavity of the valve body 1 has a stepped hole structure, the outer end of the vector sealing ring 4 is provided with a flange plate 6, and the vector sealing ring 4 is embedded in the stepped hole structure and then the flange plate 6 is fastened to the valve body by screws 5 1 on.

Preferably, there is a gap 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, which 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, and makes the sealing performance better.

Preferably, the diameter of the inner cavity of the valve body 1 is greater than 0.025%-8% of the diameter of the valve body 1 and can bear the axial force of the valve plate, meeting the requirements of thinning the valve body and having a lighter weight.

Preferably, the above-mentioned vector seal valve further includes an adjustment support pin 8, which is arranged on the opposite side of the valve shaft 3, the inner end of which is a ball head that supports the valve plate 2, and the outer end can be pivoted through a thread. It is connected to the valve body 1 movably. The support valve plate 2 at the ball head support is a spherical groove. The adjustment support pin plays a role of supporting rotation. The ball head and the spherical groove form a point contact, which has better orientation and greater friction. small.

Preferably, an elastic valve shaft sealing ring 9 is provided at the connection between the valve shaft 3 and the valve body 1, and a gap is provided at the connection between the valve shaft 3 and the valve body 1, and the gap is 0.15-0.5mm. The outer surface of the valve plate 2 and the valve The gap of the spherical section cavity in the body 1 is 0.005-0.1mm. Through the gap between the valve shaft and the valve body and the gap between the valve plate and the spherical section cavity in the valve body, the force of the bearing medium on the valve plate is applied. On the valve body, the valve shaft is almost free from shearing force, only the torsion moment when the valve is opened, so that the shaft diameter of the valve shaft can be simplified, the valve body structure is greatly reduced, the length becomes thinner, and the weight is greatly reduced. The service life is also greatly prolonged, the valve plate can be greatly thinned, the medium passing section ratio is large, the resistance is small, the installation size is short, the spherical section cavity is rigidly sealed, and the sealing effect is better, which effectively solves the problem of the valve shaft in the prior art. Excessive force caused problems such as heavy structure, short service life, long installation size, small media passage section ratio, and large resistance.

Both the back water side and the water inlet side of the valve plate are provided with recessed conical faces, which can increase the cross-sectional ratio of the flow, reduce the medium resistance, reduce the weight of the valve plate, increase the load of the valve plate, and have a longer service life.

The valve body 1 is provided with a mounting flange 10 in the circumferential direction. The mounting flange is arranged with a plurality of through holes 11. When pipes are installed on both sides of the valve body, the flanges of the pipe ends on both sides should be connected to both sides of the mounting flange. The bolt is fixedly connected, and the water stop gasket is also arranged at the installation flange connection.

Example 2: As shown in Figures 1-2 and 10-15, a combined seal vector seal valve includes a valve body 1, a valve plate 2 and a valve shaft 3. The valve plate 2 passes through a valve shaft 3 fixedly connected to it. It is rotatably connected to the valve body 1. The axial half of the inner cavity of the valve body 1 is set as a hemispherical cavity, and the other half of the inner cavity is a cylindrical cavity. The cylindrical cavity is embedded with a vector sealing ring 4, and the inner surface of the vector sealing ring 4 is connected to the valve body. The hemispherical cavity of the body 1 constitutes a spherical section cavity, and the radially outer surface of the valve plate 2 is consistent with the spherical section cavity.

Preferably, an annular packing ring 7 is installed between the inner end of the vector sealing ring 4 and the inner end of the hemispherical cavity of the valve body 1. The inner height of the packing ring 7 is higher than the surface of the spherical section cavity, and the packing ring elastically contacts the valve plate On the outer surface, cooperate with the rigid seal of the spherical section cavity to realize the flexible and rigid combined sealing of the valve, reduce the processing requirements of the spherical section cavity and the spherical surface of the valve plate, and reduce the manufacturing cost. The inner end of the vector seal ring 4 is an inner small outer Large cone surface structure 1. The inner end of the hemispherical cavity of the valve body 1 is provided with a cone surface structure 2 symmetrical to the cone surface structure 1. The packing ring 7 is squeezed between the cone surface structure 1 and the cone surface structure 2. The structure plays the role of packing ring anti-off limit fastening and vector sealing ring 4 installation guide. As shown in Figure 10-11, when the packing ring is installed, the valve shaft and valve plate are first installed on the valve body, and then the packing ring ( The circular section of the annular elastic sealing ring) is embedded in the cone structure at the inner end of the hemispherical cavity, and halfway around the valve shaft or support pin, as shown in Figures 12 and 13, and then the vector sealing ring is embedded in the set position , So as to fasten the packing ring on the spherical section cavity.

Preferably, the above-mentioned vector seal valve with combined seal further includes an adjustment support pin 8, which is arranged on the opposite side of the valve shaft 3, the inner end of which is a ball head supporting the valve plate 2, and the outer end passes through The thread can be axially movably connected to the valve body 1. The support valve plate 2 at the ball head support is a spherical groove. The adjustment support pin plays a role of supporting rotation. The ball head and the spherical groove form a point contact, which has better orientation. The friction is smaller.

Preferably, an elastic valve shaft sealing ring 9 is provided at the connection between the valve shaft 3 and the valve body 1, and a gap is provided at the connection between the valve shaft and the valve body. The gap is 0.15-0.5mm. The outer surface of the valve plate and the valve body have a spherical cross-section. The cavity gap is 0.005-0.1mm. Through the gap between the valve shaft and the valve body and the gap between the valve plate and the spherical section cavity in the valve body, the force of the carrier medium on the valve plate is applied to the valve body. The valve shaft is almost free from shearing force, only the torsional force when the valve is opened, which can simplify the shaft diameter of the valve shaft. The valve body structure is greatly reduced, the length becomes thinner, the weight is greatly reduced, and the service life is greatly extended. The valve plate can be greatly thinned, the medium passing section ratio is large, the resistance is small, the installation size is short, the rigid sealing of the spherical section cavity, and the elastic sealing of the packing ring, the sealing effect is better, and it effectively solves the existing valve in the prior art. Excessive force on the shaft causes the problems of heavy structure, short service life, long installation size, small media passage section ratio, and large resistance.

The valve body 1 is provided with a mounting flange 10 in the circumferential direction. The mounting flange is arranged with multiple through holes 11. When pipes are installed on both sides of the valve body, the flanges of the pipe ends on both sides should be connected to both sides of the mounting flange. The bolt is fixedly connected, and the water stop gasket is also arranged at the installation flange connection.

The valve opening and closing operation of the two embodiments: the valve is torsion the valve plate through the valve shaft, the valve plate rotates 90 degrees in the spherical cavity of the valve body to open and close, and the medium is closed by the valve plate It is realized by the interaction of the spherical surface consistent with the valve body 1 that the valve plate and the spherical section cavity are rigidly sealed or the combination of the packing ring is added to seal the flow-stopping medium.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should 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 claims.

Claims

A vector sealing 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) through a valve shaft (3) fixedly connected to it. ), it is characterized in that: the axial half of the inner cavity of the valve body (1) is set as a hemispherical cavity, the other half of the inner cavity is a cylindrical cavity, and the cylindrical cavity is embedded with a vector sealing ring (4), and the vector sealing ring (4) The surface and the hemispherical cavity of the valve body (1) form a spherical section cavity, and the radial outer surface of the valve plate (2) is consistent with the spherical section cavity.
The vector sealing valve according to claim 1, characterized in that a transition or interference fit is adopted between the vector sealing ring (4) and the valve body (1).
The vector sealing valve according to claim 1, characterized in that: the other half of the inner cavity of the valve body (1) has a stepped hole structure, the outer end of the vector sealing ring (4) is provided with a flange (6), and the vector sealing After the ring (4) is embedded in the stepped hole structure, the flange plate (6) is fastened on the valve body (1) with screws (5).
The vector sealing valve according to claim 3, characterized in that: the inner end of the vector sealing ring (4) and the inner end of the step hole structure maintain a gap, and the gap is not more than 1 mm.
A vector sealing valve according to any one of claims 1-4, characterized in that: an annular packing ring is installed between the inner end of the vector sealing ring (4) and the inner end of the hemispherical cavity of the valve body (1) (7) The inner height of the packing ring (7) is higher than the surface of the spherical section cavity.
A vector sealing valve according to claim 5, characterized in that: the inner end of the vector sealing ring (4) is a conical structure with a small inside and a large outside, and the inner end of the hemispherical cavity of the valve body (1) is provided There is a second conical surface structure symmetrical to the first conical surface structure, and the packing ring (7) is extruded between the first conical surface structure and the second conical surface structure.
The vector sealing valve according to claim 1, characterized in that: the diameter of the inner cavity of the valve body (1) is greater than 0.025%-8% of the caliber of the valve body (1).
A vector sealing valve according to claim 1, characterized in that it further comprises an adjustment support pin (8), the adjustment support pin (8) is arranged on the opposite side of the valve shaft (3), and its inner end is The ball head supporting the valve plate (2), the outer end is axially movably connected to the valve body (1) through threads, and the supporting valve plate (2) at the ball head support is a spherical groove.
A vector sealing valve according to claim 1, characterized in that: a valve shaft sealing ring (9) is provided at the connection between the valve shaft (3) and the valve body (1).