CN219452948U - Eccentric straight-through double-hemisphere valve - Google Patents

Abstract

An eccentric straight-through double-hemisphere valve comprises a left valve body, a right valve body and a valve core, wherein the right valve body is provided with a flow inlet, and a right valve seat is arranged in the flow inlet; the left valve body is provided with a flow outlet, and a left valve seat is arranged in the flow outlet; the top surface and the bottom surface of left valve body are equipped with big gland mounting hole respectively, and the central point of big gland mounting hole puts the central line one side setting of removal mouth, and the front and back side of the case body of case runs through and is provided with the runner hole, and the left side of case body is provided with sealed sphere body installation position, installs on the sealed sphere body installation position and the sealed sphere body of left disk seat cooperation, and the sphere center of sealed sphere body is located the central line of mouth, and the right side of case body is provided with the eccentric seal sphere with right disk seat cooperation seal, and the center of eccentric seal sphere is located the central line of valve shaft mounting hole. The eccentric straight-through double-half ball valve has a wedge tight sealing principle structure of the eccentric half ball valve and a straight-through pipeline of the full ball valve, so that the inner cavity of the ball body is not easy to crystallize, and the sealing is stable and reliable.

Description

Eccentric straight-through double-hemisphere valve

Technical Field

The utility model relates to a valve, in particular to an eccentric straight-through double-half ball valve.

Background

In modern industrial production, there are few pipelines for conveying fluid, and a valve plays a role in connecting or cutting off fluid medium in the pipeline on the pipeline, so that the valve is an indispensable switch. In the industrial production process, because pipelines of different production enterprises convey different fluid media, some pipelines need to be conveyed under high pressure, some pipelines are severely eroded and cavitation corroded, some pipelines even contain sundries, some pipelines can generate crystallization, and in order to meet the requirement of conveying different media, different kinds of valves need to be equipped, so that the valve production enterprises produce valves with various kinds, the production and management costs are high, common valves comprise gate valves, slurry valves, butterfly valves, full ball valves, half ball valves, stop valves and the like, and the valves have respective use defects in the use of industrial pipelines, such as: the common gate valve cannot solve the accumulation of materials at the bottom of the gate plate; the slurry valve cannot solve the problems of material accumulation and sealing and wear resistance; butterfly plates of butterfly valves are easy to damage; because the global valve adopts concentric sealing, the sealing surface is always in contact with the valve ball, and medium is easy to be detained in the valve cavity to form crystallization, so that the sealing position is damaged or the valve cannot be closed; the semi-ball valve is closed in a one-way, and the sealing structure is a wedged hemispherical seal, so that the semi-ball valve is easily eroded by a medium to cause untight closing, and meanwhile, when the semi-ball valve is closed, massive sundries or crystals are easily caused to be incapable of closing, so that the semi-ball valve is hard; the valve core of the stop valve is easy to damage, etc.

It has been found through application research that in order to reduce the damage of use, the valve with optimal use performance under the condition needs to be selected according to the use environment and the conveyed medium. However, these valves are often used for various reasons, and thus, in the practical application process, the problem of easy damage during the use process cannot be effectively solved, and the service life of some valves is only several months, even one or more months of use is required to be replaced, so that the problem cannot be fundamentally solved by changing the valve body and the sealing material. If the advantages of a plurality of valves can be combined and designed into a valve, the types of valves produced by enterprises can be reduced, the production and management cost is reduced, and the service life of the valve can be prolonged.

Disclosure of Invention

The utility model aims to provide an eccentric straight-through double-half ball valve, which has a wedge tight sealing principle structure of the eccentric half ball valve and a straight-through pipeline of a full ball valve, is not easy to crystallize in the inner cavity of a ball body, and is stable and reliable in sealing in a severe flushing environment and a crystallization environment.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the eccentric straight-through double-hemisphere valve comprises a left valve body, a right valve body and a valve core, wherein the left valve body is in sealing connection with the right valve body through a flange surface bolt; the left valve body is provided with a water outlet, a left valve seat is fixedly and limitedly arranged in the water outlet through a left screw nut, the left valve body and the right valve body are both provided with flange faces for pipeline connection, the top face and the bottom face of the left valve body are respectively provided with big gland mounting holes of an upper big gland and a lower big gland, the upper big gland and the lower big gland are respectively arranged in the corresponding big gland mounting holes, an upper valve shaft and a lower valve shaft are correspondingly arranged in the upper big gland and the lower big gland in a penetrating way, the top face and the bottom face of a valve core are respectively provided with a valve shaft mounting hole, the valve core is arranged in the left valve body through an upper valve shaft and a lower valve shaft support, a sealing gasket, a packing and a copper pad are correspondingly and limitedly arranged between the upper big gland and the upper valve shaft and between the lower big gland and the lower valve shaft through an upper packing gland and a lower packing, the bottom of the lower packing gland is covered with a bottom cover, the top face of the left valve body is provided with an upper bracket, the upper bracket is provided with a switch device for controlling the upper valve shaft to rotate, the switch device can be a manual switch device, a cylinder-driven switch device or a motor-driven switch device, the center position of the large gland mounting hole is deviated from one side of the center line of the flow opening, the deviation is 6 mm, the valve core adopts an eccentric straight-through double-hemispherical valve core structure, the front side and the rear side of the valve core body penetrate through a flow passage hole, the left side of the valve core body is provided with a sealing spherical body mounting position, the sealing spherical body mounting position is provided with a sealing spherical body matched and sealed with a left valve seat, the width of the sealing spherical body is larger than that of the sealing spherical body mounting position, the spherical center of the sealing spherical body is positioned on the center line of the flow opening, the right side of the valve core body is provided with an eccentric sealing spherical surface matched and sealed with a right valve seat, the center of the eccentric sealing spherical surface is positioned on the center line of the valve shaft mounting hole, and when the valve is mounted, the center line of the valve shaft mounting hole coincides with the center line of the large gland mounting hole.

Further preferred is: and an upper valve shaft sealing ring is arranged at the joint of the upper valve shaft and the valve core. The valve core is connected with the upper valve shaft through involute splines, namely, the valve core is provided with spline inner teeth, the upper valve shaft is in spline connection, the valve core and the valve shaft are sealed through sealing rings, media cannot enter, and sealing reliability of the valve shaft is guaranteed. And a lower valve shaft sealing ring is arranged at the joint of the lower valve shaft and the valve core.

Further preferred is: the sealing surface of left disk seat and case be provided with wear-resisting alloy layer, wear-resisting alloy layer's setting can reduce the friction loss of case and left disk seat.

Further preferred is: the right valve body inner liner is provided with a sealing gasket sealed with the eccentric sealing spherical surface, and the sealing gasket, the right valve seat and the right screw nut are arranged correspondingly eccentrically, so that when the right valve body is connected with the inflow pipeline, no step is arranged at the inflow port to block the inflow of fluid. The sealing gasket is preferably a polytetrafluoroethylene gasket containing% carbon fibers, and a high temperature 747 adhesive can be used to bond the polytetrafluoroethylene gasket to the right valve body.

Further preferred is: the flow passage hole in-situ fixation be provided with the runner pipe, the internal diameter of runner pipe is the same with the internal diameter of right disk seat outflow end, the outflow end external diameter of runner pipe is less than the internal diameter of left disk seat to stretch into in the left disk seat, the outflow end outer wall of runner pipe is provided with the bevel connection, the runner pipe is interfered with the left disk seat when avoiding rotating to close. By adopting the structure, when the valve core is opened to flow, fluid directly enters the left valve seat after passing through the flow channel pipe, and the sealing surface of the left valve seat is not flushed, so that the service life of the left valve seat is prolonged. The runner pipe can be made of independent runner materials, and various coatings such as carbonized black can be spray welded according to the requirements, so that the channel can be suitable for various environments.

The utility model has the advantages that:

1. the valve body of the eccentric straight-through double-half ball valve adopts a two-section connecting valve body which is a left valve body and a right valve body respectively, and the valve body is supported by a combined valve and is modularized into a concept, so that the valve is extremely convenient to repair and maintain. The right valve body is provided with a water inlet, and a right valve seat is fixedly and limitedly arranged in the water inlet through a right nut; the valve core is fixedly and limitedly provided with a left valve seat through a left screw nut, flange faces for pipeline connection are arranged in the left valve seat, the top face and the bottom face of the left valve body are respectively provided with large gland mounting holes of an upper large gland and a lower large gland, the upper large gland and the lower large gland are respectively arranged in the corresponding large gland mounting holes, an upper valve shaft and a lower valve shaft are correspondingly penetrated in the upper large gland and the lower large gland, the top face and the bottom face of the valve core are respectively provided with a valve shaft mounting hole, the valve core is arranged in the left valve body through the upper valve shaft and the lower valve shaft support, the center position of the large gland mounting holes is deviated from the center line of the flow port, the valve core adopts an eccentric straight-through double-hemispherical valve core structure, the front side and the rear sides of the valve core body are provided with runner holes in a penetrating way, the left side of the valve core body is provided with a sealing spherical body mounting position, the sealing spherical body is mounted on the sealing spherical body mounting position, the spherical center of the sealing spherical body is positioned on the center line of the corresponding large gland mounting holes, the right side of the valve core body is provided with an eccentric sealing spherical surface matched with the right valve seat, the center line of the sealing spherical body is positioned on the center line of the valve shaft mounting hole, the center line of the eccentric spherical body is positioned on the center line of the valve shaft mounting hole, and the center line of the valve shaft is coincident with the center line of the valve shaft mounting hole; the sealing device has the wedge tight sealing principle of the eccentric half ball valve and the straight-through pipeline of the ball valve, and overcomes the defect that the medium cannot be removed from the inner cavity of the global valve, so that the sealing is more reliable, and the defects that the slurry type cut-off valve is not wear-resistant, blocked, not firm in sealing and difficult in replacing accessories are thoroughly overcome.

2. The right valve body lining is provided with a sealing gasket sealed with the eccentric sealing spherical surface, the first-stage sealing is added, the sealing of the inlet is ensured, and the medium is not easy to adhere to the right valve body, and when the valve is opened, the fluid medium in the inner cavity of the valve body can be flushed out due to a drain hole, so that the valve is not easy to be blocked due to crystallization.

3. The flow passage hole internal fixation of case body is provided with the runner pipe, the internal diameter of runner pipe is the same with the internal diameter of right disk seat outflow end, the outflow end external diameter of runner pipe is less than the internal diameter of left disk seat, and stretch into in the left disk seat, the outflow end outer wall of runner pipe is provided with the bevel connection, the runner pipe is interfered with the left disk seat when avoiding rotating to close, also let the inner wall between runner pipe and the left disk seat have a distance, the fluid medium that the in-process was new in the opening washes out former fluid medium that holds, also guarantee when the case was opened and is led to the fluid, fluid directly gets into in the left disk seat after passing through the runner pipe, can not wash out the sealed face of left disk seat, improve the life of left disk seat.

Drawings

FIG. 1 is a schematic diagram of the structure of the eccentric straight-through double-hemisphere valve in the open state;

FIG. 2 is a schematic diagram of the structure of the eccentric straight-through double-hemisphere valve in the closed state;

FIG. 3 is a schematic view of the structure of the valve body;

FIG. 4 is a schematic top view of FIG. 3;

FIG. 5 is a schematic structural view of a valve cartridge;

FIG. 6 is a schematic structural view of a sealing gasket;

FIG. 7 is a schematic view in the A-A direction of FIG. 6;

FIG. 8 is a schematic view of the structure of the right valve body;

FIG. 9 is a schematic view in the C-C direction of FIG. 8;

FIG. 10 is a schematic view in the B-B direction of FIG. 8;

FIG. 11 is a schematic view of the structure of the right nut;

FIG. 12 is an E-E schematic view of FIG. 11;

FIG. 13 is a schematic view in the D-D direction of FIG. 11;

the names corresponding to the serial numbers in the figures are:

1. a left valve body; 2. a left nut; 3. a left valve seat; 4. a wear resistant alloy layer; 5. a flow channel tube; 6. a valve core; 7. a sealing gasket; 8. packing; 9. a large gland is arranged; 10. a packing gland is arranged; 11. an upper bracket; 12. a switching device; 13. an upper valve shaft; 14. a copper pad; 15. a right valve body; 16. a sealing gasket; 17. a right valve seat; 18. a right nut; 19. a lower valve shaft; 20. a lower large gland, 21, a bottom cover, 22 and a lower packing gland; 23. sealing the spherical body; 24. eccentric sealing sphere; 25. a large gland mounting hole; 26. sealing the sphere body installation position; 27. and a valve shaft mounting hole.

Detailed Description

For a more detailed description of the utility model, the utility model is further described below with reference to the accompanying drawings.

Example 1

The eccentric straight-through double-half ball valve comprises a left valve body 1, a right valve body 15 and a valve core 6, wherein the left valve body 1 and the right valve body 15 are in sealing connection by adopting flange surface bolts, the right valve body 15 is provided with a water inlet, and a right valve seat 17 is fixedly and limitedly arranged in the water inlet through a right screw 18; the left valve body 1 is provided with a flow outlet, the flow outlet is internally provided with a left valve seat 3 through a left screw nut 2, the left valve body 1 and a right valve body 15 are both provided with flange surfaces for pipeline connection, the top surface and the bottom surface of the left valve body 1 are respectively provided with big gland mounting holes 25 of an upper big gland 9 and a lower big gland 20, the upper big gland 9 and the lower big gland 20 are respectively arranged in the corresponding big gland mounting holes 25, an upper valve shaft 13 and a lower valve shaft 19 are correspondingly penetrated in the upper big gland 9 and the lower big gland 20, the top surface and the bottom surface of the valve core 6 are respectively provided with a valve shaft mounting hole 27, the valve core 6 is supported and arranged in the left valve body 1 through the upper valve shaft 13 and the lower valve shaft 19, a sealing gasket 7, a packing 8 and a copper gasket 14 are correspondingly arranged between the upper big gland 9 and the upper valve shaft 13 and between the lower big gland 20 and the lower valve shaft 19 through an upper packing gland 10 and a lower packing 22, the bottom cover of the lower packing gland 22 is provided with a bottom cover 21, the top surface of the left valve body 1 is provided with an upper bracket 11, the upper bracket 11 is provided with a switch device 12 for controlling the upper valve shaft 13 to rotate, the center position of the large gland mounting hole 25 is deviated from one side of the center line of the flow outlet by 6 mm, the valve core 6 adopts an eccentric straight-through double hemispherical valve core structure, the front side and the rear side of the valve core body penetrate through and are provided with flow passage holes, the left side of the valve core body is provided with a sealing spherical body mounting position 26, the sealing spherical body mounting position 26 is provided with a sealing spherical body 23 matched and sealed with the left valve seat 3, the spherical center of the sealing spherical body 23 is positioned on the center line of the flow outlet, the right side of the valve core body is provided with an eccentric sealing spherical surface 24 matched and sealed with the right valve seat 17, the center of the eccentric sealing spherical surface 24 is positioned on the center line of the valve shaft mounting hole 27, the centerline of the valve shaft mounting hole 27 coincides with the centerline of the large gland mounting hole 25.

An upper valve shaft sealing ring is arranged at the joint of the upper valve shaft 13 and the valve core 6. The valve core 6 and the upper valve shaft 13 are connected through involute splines, namely, the valve core 6 is provided with spline inner teeth, the upper valve shaft 13 is in spline connection, the valve core and the valve shaft are sealed through sealing rings, media cannot enter, and sealing reliability of the valve shaft is guaranteed. The joint of the lower valve shaft 19 and the valve core 6 is provided with a lower valve shaft sealing ring.

The sealing surface of the left valve seat 3 and the valve core 6 is provided with a wear-resistant alloy layer 4. The wear-resistant alloy layer 4 can reduce the rotation friction loss of the valve core 6 and the left valve seat 3.

The right valve body 15 is internally lined with a sealing gasket 16 sealed with an eccentric sealing spherical surface 24, and the sealing gasket 16, the right valve seat 17 and the right screw 18 are correspondingly and eccentrically arranged, so that when the right valve body 15 is connected with an inflow pipeline, no step is arranged at the inflow port to block the inflow of fluid. The sealing gasket 16 is a polytetrafluoroethylene gasket containing 20% carbon fibers, and the polytetrafluoroethylene gasket is bonded with the right valve body 15 by adopting a high-temperature-resistant 747 adhesive.

The flow passage hole in-situ fixation be provided with runner pipe 5, the internal diameter of runner pipe 5 is the same with the internal diameter of right disk seat 17 outflow end, the outflow end external diameter of runner pipe 5 is less than the internal diameter of left disk seat 3 to stretch into in the left disk seat 3, the outflow end outer wall of runner pipe 5 is provided with the bevel connection, runner pipe 5 and left disk seat 3 interfere when avoiding rotating to close.

The above description is not intended to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the particular embodiments disclosed, as many variations, modifications, additions and substitutions are possible, without departing from the scope of the utility model as disclosed in the accompanying claims.

Claims (4)

1. An eccentric straight-through double-hemisphere valve comprises a left valve body (1), a right valve body (15) and a valve core (6), wherein the left valve body (1) is in sealing connection with the right valve body (15), the right valve body (15) is provided with a flow inlet, and a right valve seat (17) is fixedly and limitedly arranged in the flow inlet through a right screw nut (18); the left valve body (1) is provided with a flow outlet, the flow outlet is internally provided with a left valve seat (3) through a left screw nut (2) in a fixed limit manner, the left valve body (1) and a right valve body (15) are both provided with flange faces for pipeline connection, the top face and the bottom face of the left valve body (1) are respectively provided with large gland mounting holes (25) of an upper large gland (9) and a lower large gland (20), the upper large gland (9) and the lower large gland (20) are respectively mounted in the corresponding large gland mounting holes (25), an upper valve shaft (13) and a lower valve shaft (19) are correspondingly arranged in the upper large gland (9) and the lower large gland (20) in a penetrating manner, the top face and the bottom face of a valve core (6) are respectively provided with a valve shaft mounting hole (27), the valve core (6) is supported and mounted in the left valve body (1) through the upper valve shaft (13) and the lower valve shaft (19), a sealing gasket (7), a sealing gasket (8) and a copper gasket (21) are correspondingly mounted between the upper large gland (9) and the upper large gland (13) and the lower large gland (20) and the lower gland (19), the upper sealing gasket (7) are correspondingly mounted in the corresponding manner, the upper bracket (11) is provided with a switch device (12) for controlling the upper valve shaft (13) to rotate, and is characterized in that: the central position of big gland mounting hole (25) offset remove central line one side setting of mouth, case (6) adopt the straight-through double hemispheric case structure of eccentric, the front and back side of its case body runs through and is provided with the runner hole, the left side of case body is provided with sealed sphere body installation position (26), install on sealed sphere body installation position (26) with sealed sphere body (23) of left disk seat (3), the sphere center of sealed sphere body (23) is located the central line of mouth, the right side of case body is provided with the eccentric sealed sphere (24) of cooperation seal with right disk seat (17), the center of eccentric sealed sphere (24) is located the central line of valve shaft mounting hole (27).

2. The eccentric through double-half ball valve according to claim 1, wherein: the sealing surface of the left valve seat (3) and the valve core (6) is provided with a wear-resistant alloy layer (4).

3. The eccentric through double-half ball valve according to claim 1, wherein: the right valve body (15) is internally provided with a sealing gasket (16) which is sealed with an eccentric sealing spherical surface (24).

4. The eccentric through double-half ball valve according to claim 1, wherein: the flow passage hole in-situ fixation be provided with runner pipe (5), the internal diameter of runner pipe (5) is the same with the internal diameter of right disk seat (17) outflow end, the outflow end external diameter of runner pipe (5) is less than the internal diameter of left disk seat (3) to stretch into in left disk seat (3), the outflow end outer wall of runner pipe (5) is provided with the bevel connection.