CN215410315U

CN215410315U - Double-floating bidirectional hard-sealing rotary ball valve

Info

Publication number: CN215410315U
Application number: CN202121392307.2U
Authority: CN
Inventors: 胡杰; 邱荣水; 陈礼福
Original assignee: Hunan Pump Valve Manufactory Co ltd
Current assignee: Hunan Pump Valve Manufactory Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-01-04
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a double-floating bidirectional hard-sealing rotary ball valve, which comprises: the valve body is internally provided with a first positioning step and is penetrated with a valve shaft capable of rotating around the axis of the valve body; the valve plate is arranged in the valve body and connected with the valve shaft, and the valve shaft can drive the valve plate to rotate by rotation; the floating valve seat is movably arranged in the valve body and is connected with the valve body in a sealing way; the floating ring is movably connected to one side of the valve plate, which is back to the valve shaft; the elastic piece is arranged between the valve plate and the floating ring and used for pushing the floating ring to move towards the direction far away from the valve plate; the valve plate can drive the floating ring to rotate so as to be in sealing contact with the floating valve seat, and the first positioning step is used for abutting against the floating valve seat so that the floating valve seat can be attached and sealed with the floating ring. According to the double-floating bidirectional hard-seal rotary ball valve, the friction force between the sealing surfaces of the valve opening can be effectively reduced, the opening and closing torque is reduced, and the service life of equipment is prolonged.

Description

Double-floating bidirectional hard-sealing rotary ball valve

Technical Field

The utility model relates to a rotary ball valve, in particular to a double-floating bidirectional hard-sealing rotary ball valve.

Background

The Chinese patent discloses a high-performance bidirectional hard-sealing rotary ball valve, compared with the traditional butterfly valve, the floating valve seat technology of the ball valve is fused, so that the rotary ball valve with a butterfly structure has bidirectional hard sealing performance, in practical application, when the valve is in a closed state and bears the pressure of a medium flowing from a valve seat end to a valve shaft end, the valve shaft and the valve plate can displace in the direction away from the floating valve seat along the medium flow direction due to tolerance fit, stress and elastic deformation of the assembly and the like, the floating valve seat can synchronously displace in the direction of the valve plate under the pressure of the medium, so that the floating valve seat is always contacted with the valve plate and keeps sealing, meanwhile, the sealing force is only the thrust of the floating valve seat facing the medium flow ring surface under the action of water power, the area of the ring surface is small, the local stress of a sealing pair is small, the opening and closing moment is also low when the valve is sealed, and the valve can be opened and closed easily; when the valve bears the pressure of a medium flowing from the valve shaft end to the valve seat end, the valve shaft and the valve plate can also have the tendency of pressing the floating valve seat in the direction along the medium flow direction to displace because of tolerance fit, stress elastic deformation and the like of assembly, but no displacement space exists in the direction, the acting force of the medium on the whole valve plate can be greatly pressed on the positioned floating valve seat except the bearing of the valve shaft, so that the opening and closing moment of the valve is very large in the flow direction, meanwhile, the stress of the sealing contact part is concentrated, the abrasion of a sealing surface is easily caused, and the service life of the valve is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the double-floating bidirectional hard-seal rotary ball valve which can effectively reduce the friction force of a sealing surface and reduce the opening and closing torque of the valve so as to prolong the service life of equipment.

The double-floating bidirectional hard sealing rotary ball valve comprises: the valve body is internally provided with a first positioning step which protrudes inwards, and a valve shaft which can rotate around the axis of the valve body is arranged in a penetrating way; the valve plate is arranged in the valve body and connected with the valve shaft, and the valve shaft can drive the valve plate to rotate; the floating valve seat is movably arranged in the valve body and is connected with the valve body in a sealing way; the floating ring is movably connected to one side, back to the valve shaft, of the valve plate; the elastic piece is arranged between the valve plate and the floating ring and used for pushing the floating ring to move towards the direction far away from the valve plate; the valve plate can drive the floating ring to rotate so as to be in sealing contact with the floating valve seat, and the first positioning step is used for abutting against the floating valve seat, so that the floating valve seat can be attached and sealed with the floating ring.

The double-floating bidirectional hard-sealing rotary ball valve provided by the embodiment of the utility model at least has the following technical effects: the valve plate and the floating valve seat can move transversely, the defect that the sealing surfaces of the floating valve seat and the floating ring need to bear most of blind plate thrust when the existing structure bears the medium pressure flowing from the valve shaft to the valve seat is avoided, the friction force between the sealing surfaces of the floating valve seat and the floating ring is effectively reduced, the opening and closing torque of the valve is also reduced, and the service lives of the floating valve seat and the floating ring are prolonged.

According to some embodiments of the utility model, a stop bolt is included for connecting the valve plate and the floating ring; the elastic piece is a butterfly spring, and the butterfly spring is sleeved on the limiting bolt.

According to some embodiments of the utility model, the valve plate is provided with a mounting step at the edge, the floating ring is mounted in the mounting step, and the limit bolt penetrates through the floating ring and is connected with the valve plate.

According to some embodiments of the utility model, the limit bolt comprises a head part, a middle part and a connecting part, wherein two ends of the middle part are respectively connected with the head part and the connecting part, the connecting part extends into the valve plate and is in threaded connection with the valve plate, the floating ring is sleeved in the middle part and can move along the middle part, and the head part is used for limiting the floating ring.

According to some embodiments of the utility model, the floating ring comprises a vertical portion and a horizontal portion, the vertical portion being fixedly connected with the horizontal portion; the horizontal part is attached to the valve plate, and the vertical part is connected with the valve plate through the limiting bolt.

According to some embodiments of the utility model, a containing groove is formed in one surface of the vertical part facing the valve plate, and one end of the belleville spring is embedded into and abuts against the containing groove; the other end of the butterfly spring is pressed against the valve plate.

According to some embodiments of the utility model, the valve shaft is connected to the valve plate at a middle portion thereof, and the valve shaft extends out of the valve body at one end thereof and is connected to a driving device for driving the valve shaft to rotate.

According to some embodiments of the utility model, the valve body is provided with an upper shaft hole and a lower shaft hole for the valve shaft to pass through, the valve plate is provided with a through hole for the valve shaft to pass through, a pin is radially penetrated in the through hole, and the valve shaft and the valve plate are connected through the pin.

According to some embodiments of the utility model, an end cap is mounted to an end of the lower shaft bore for sealing the lower shaft bore.

According to some embodiments of the utility model, a positioning ring groove is formed in the inner wall of the lower shaft hole, a clamp spring is mounted in the positioning ring groove, and the clamp spring is used for axially limiting the valve shaft.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a first angled cross-sectional view of an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 1;

FIG. 4 is a schematic structural diagram of the first state of the embodiment of the present invention;

fig. 5 is a schematic structural diagram in a second state according to the embodiment of the present invention.

Reference numerals:

the valve comprises a valve body 100, a first positioning step 110, a limiting block 120, a valve shaft 130, an upper shaft hole 140, a lower shaft hole 150, a clamp spring 151 and an end cover 160;

valve plate 200, mounting step 210, pin 220;

a floating valve seat 300, a sealing cone 310;

the floating ring 400, the vertical part 410, the accommodating groove 411, the horizontal part 420 and the sealing spherical surface 430;

a stopper bolt 500, a head 501, an intermediate portion 502, a connecting portion 503, and a belleville spring 510.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, a double-floating bidirectional hard-seal rotary ball valve according to an embodiment of the present invention includes:

the valve body 100 is internally provided with a first positioning step 110 which protrudes inwards, and a valve shaft 130 which can rotate around the axis of the valve body is arranged in a penetrating way; a limiting block 120 is further disposed in the valve body 100, and the limiting block 120 and the first positioning step 110 are spaced apart from each other. First location step 110 is the convex ring of valve body 100 inside, and stopper 120 is for the convex lug inside towards valve body 100, and stopper 120 is equipped with a plurality ofly, and a plurality of stoppers 120 set up along the even interval of circumference, and stopper 120 just sets up in being closer to valve shaft 130 position with the internal connection of valve body 100, and stopper 120 locates the right side of first location step 110 promptly. The stopper 120 may be fixedly connected or detachably connected to the valve body 100. The valve shaft 130 is vertically inserted through the middle of the valve body 100.

The valve plate 200 is arranged in the valve body 100 and connected with the valve shaft 130, and the valve shaft 130 can drive the valve plate 200 to rotate;

the floating valve seat 300 is movably arranged in the valve body 100 and is connected with the valve body 100 in a sealing way; a sealing rubber ring is arranged between the contact surfaces of the floating valve seat 300 and the valve body 100 for sealing the contact surfaces of the floating valve seat 300 and the valve body 100. The upper portion of the floating valve seat 300 is sealingly coupled to the interior of the valve body 100. The floating valve seat 300 is mounted between the first retention step 110 and the stop block 120 and is capable of lateral movement therebetween. The thickness of the floating valve seat 300 in the left-right direction is smaller than the distance between the first positioning step 110 and the stopper 120, so that the floating valve seat 300 can move left and right under the action of the flowing medium, but the distance of the movement is small.

A floating ring 400 movably connected to a side of the valve plate 200 away from the valve shaft 130;

the elastic piece is arranged between the floating ring 400 and the valve plate 200 and used for pushing the floating ring 400 to move towards the direction far away from the valve plate 200;

wherein rotation of the valve plate 200 rotates the floating ring 400 into sealing contact with the floating valve seat 300, the floating ring 400 cooperates with the first positioning step 110 to clamp the floating valve seat 300.

Because the floating ring 400 and the floating valve seat 300 can move, the defect that the sealing surfaces of the floating valve seat 300 and the floating ring 400 need to bear most of the thrust of the blind plate when the existing structure bears the medium pressure flowing from the valve shaft 130 to the valve seat is avoided, the friction force between the sealing surfaces of the floating valve seat 300 and the floating ring 400 is effectively reduced, the opening and closing torque of the valve is also reduced, and the service lives of the floating valve seat 300 and the floating ring 400 are prolonged.

In some embodiments of the present invention, a stop bolt 500 is included, the stop bolt 500 being used to connect the valve plate 200 and the floating ring 400; the elastic member is a belleville spring 510, and the limit bolt 500 is sleeved with the belleville spring 510.

In some embodiments of the present invention, the valve plate 200 is provided with a mounting step 210 at the edge, the floating ring 400 is mounted in the mounting step 210, and the limit bolt 500 passes through the floating ring 400 and is connected with the valve plate 200.

In some embodiments of the present invention, the limiting bolt 500 includes a head portion 501, an intermediate portion 502 and a connecting portion 503, the two ends of the intermediate portion 502 are respectively connected to the head portion 501 and the connecting portion 503, the connecting portion 503 extends into the valve plate 200 and is in threaded connection with the valve plate 200, the floating ring 400 is sleeved on the intermediate portion 502 and can move along the intermediate portion 502, and the head portion 501 is used for limiting the floating ring 400.

In some embodiments of the present invention, the floating ring 400 includes a vertical portion 410 and a horizontal portion 420, the vertical portion 410 being fixedly connected with the horizontal portion 420; the horizontal portion 420 is attached to the valve plate 200, and the vertical portion 410 is connected to the valve plate 200 by a stopper bolt 500. Specifically, as shown in fig. 2, the floating ring 400 has a 7-shaped cross section, and includes a vertical portion 410 and a horizontal portion 420, the edge of the valve plate 200 is provided with a mounting step 210, and the vertical portion 410 is embedded in the mounting step 210. The vertical portion 410 is provided with a through hole through which the intermediate portion 502 of the stopper bolt 500 passes, and the valve plate 200 is provided with a screw hole into which the connecting portion 503 of the stopper bolt 500 is screwed, and the stopper bolt 500 passes through the vertical portion 410 and is screwed into the screw hole.

It should be understood that the valve plate 200 is provided with a plurality of screw holes along the uniform interval of its annular edge, the last screw hole that corresponds on the valve plate 200 of floating ring 400 is equipped with a plurality of through-holes, and the stop bolt 500 is equipped with many corresponding to a plurality of through-holes, all overlaps on every stop bolt 500 to be equipped with a disc spring 510, and a plurality of disc springs 510 form the disc spring group.

Further, the diameter of the head 501 of the limit bolt 500 is larger than that of the middle part 502, the diameter of the middle part 502 is larger than that of the connecting part 503, and after the connecting part 503 is completely screwed into the screw hole of the valve plate 200, a partial space is still formed between the right side surface of the vertical part 410 and the valve plate 200, that is, the length of the middle part 502 in the left-right direction is larger than the thickness of the floating ring 400 in the left-right direction, so that the floating ring 400 can move left and right between the valve plate 200 and the head 501.

Further, in the initial state, the bottom of the vertical portion 410 does not contact with the surface of the mounting step 210, and a part of the space is provided between the two, so as to reserve a space for elastic deformation of the valve plate 200 and the valve shaft 130 when the valve plate and the valve shaft 130 are subjected to the pressure of the medium flowing from the end of the valve shaft 130 to the floating valve seat 300, and to avoid the thrust of the medium directly acting on the floating ring 400.

In some embodiments of the present invention, a receiving groove 411 is formed on a surface of the vertical portion 410 facing the valve plate 200, and one end of the belleville spring 510 is embedded into the receiving groove 411 and abuts against the receiving groove 411; the other end of the belleville spring 510 abuts against the valve plate 200. Specifically, as shown in fig. 2, the receiving slot 411 is recessed to the left, and the left end of the belleville spring 510 extends into and abuts against the receiving slot 411. The accommodation groove 411 is provided such that when the right side surface of the vertical portion 410 abuts against the valve plate 200, the belleville spring 510 still has a compressed margin, instead of completely compressing the spring to realize the stroke limitation of the floating ring 400, which prolongs the service life of the belleville spring 510.

In some embodiments of the present invention, the floating valve seat 300 is provided with a sealing conical surface 310, and the side of the floating ring 400 facing away from the valve plate 200 is provided with a sealing spherical surface 430, and the sealing conical surface 310 can be in sealing contact with the sealing spherical surface 430.

When the floating valve seat 300 is in sealing contact with the floating ring 400, the floating valve seat 300 abuts against the first positioning step 110; the right side surface of the vertical portion 410 of the floating ring 400 has the maximum interval from the valve plate 200.

FIG. 4 is a position diagram of the various components of the rotary ball valve of the present invention when subjected to a left-to-right directional media pressure; in the state of fig. 4, the valve plate 200 and the valve shaft 130 are elastically deformed to the right by the medium pressure from the left to the right; the pressure of the medium acts on the left end face of the floating valve seat 300 to push the floating valve seat 300 to the right, pressing the floating valve seat 300 against the floating ring 400 and maintaining the seal. Under the action of medium pressure, finally, the right side surface of the vertical part 410 of the floating ring 400 is abutted against the valve plate 200, and thrust formed by the medium is transmitted to the valve plate 200 through the floating ring 400 and is borne by the valve plate 200 and the valve shaft 130; the left side of the floating valve seat 300 is displaced from the first seating step 110 by an amount h 1.

FIG. 5 is a diagram of the position of various components of the rotary ball valve of the present invention when subjected to media pressure in the right-to-left direction; in the state of fig. 5, the valve plate 200 and the valve shaft 130 are elastically deformed to the left under the pushing of the medium pressure from the right to the left, and the floating ring 400 is pressed to the floating valve seat 300; the medium pressure also acts on the right end face of the horizontal part 420 of the floating ring 400, pushing the floating ring 400 to move towards the floating valve seat 300, and the floating ring 400 keeps the sealing contact with the floating valve seat 300 under the combined action of the belleville spring 510 and the medium pressure. Since the valve plate 200 is deformed to the left by the medium pressure, the gap between the right side surface of the vertical portion 410 and the valve plate 200 is reduced to h 2. Due to the existence of h2, when the valve plate 200 is subjected to medium pressure from right to left, the belleville spring 510 between the floating ring 400 and the valve plate 200 still has a partial compression space in the process of rotating and opening the valve, so that when the valve plate 200 drives the floating ring 400 to rotate, the stress on the sealing contact surface of the floating ring 400 and the floating valve seat 300 is controllable, the mutual friction damage between the sealing conical surface 310 of the floating valve seat 300 and the sealing spherical surface 430 of the floating ring 400 is reduced, the rotating torque of the valve plate 200 driven by the valve shaft 130 is reduced, and the service life of the device is prolonged.

In some embodiments of the present invention, the valve shaft 130 is connected to the valve plate 200 at the middle, and one end of the valve shaft 130 extends out of the valve body 100 and is connected to a driving device for driving the valve shaft to rotate.

In some embodiments of the present invention, the valve body 100 is provided with an upper shaft hole 140 and a lower shaft hole 150 through which the valve shaft 130 passes, the valve plate 200 is provided with a through hole through which the valve shaft 130 passes, a pin 220 is radially penetrated in the through hole, and the valve shaft 130 and the valve plate 200 are connected by the pin 220. The valve shaft 130 passes from the upper shaft bore 140, through the through-hole and into the lower shaft bore 150. During installation, the floating ring 400 is installed on the valve plate 200, then the floating valve seat 300 is installed, finally the valve plate 200 is installed in the valve body 100, the valve shaft 130 is inserted from top to bottom, and then the valve shaft 130 and the valve plate 200 are connected through the pin 220.

In some embodiments of the present invention, an end cap 160 is mounted to the end of lower shaft bore 150 for sealing lower shaft bore 150.

In some embodiments of the present invention, a positioning ring groove is formed on an inner wall of the lower shaft hole 150, a snap spring 151 is installed in the positioning ring groove, and the snap spring 151 is used for axially limiting the position of the valve shaft 130. Specifically, as shown in fig. 1 and 3, the end cap 160 is disposed at the lowermost end of the lower shaft hole 150, the lower end of the valve shaft 130 is blocked by the snap spring 151 and does not penetrate through the valve body 100, and the end cap 160 is used for sealing the lower shaft hole 150 to prevent the pressure medium in the valve body 100 from flowing out of the lower shaft hole 150. Since the upper end of the valve shaft 130 extends out of the upper shaft hole 140 and is connected to the driving device, the end cap 160 is not provided in the upper shaft hole 140, but a seal ring or the like is provided in a gap between the valve shaft 130 and the upper shaft hole 140.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a two-way hard sealed ball-cock assembly of two floats which characterized in that includes:

the valve body (100) is internally provided with a first positioning step (110) which protrudes inwards, and a valve shaft (130) which can rotate around the axis of the valve body is arranged in a penetrating way;

the valve plate (200) is arranged in the valve body (100) and connected with the valve shaft (130), and the valve shaft (130) can drive the valve plate (200) to rotate;

the floating valve seat (300) is movably arranged in the valve body (100) and is connected with the valve body (100) in a sealing way;

the floating ring (400) is movably connected to one side, back to the valve shaft (130), of the valve plate (200);

the elastic piece is arranged between the floating ring (400) and the valve plate (200) and used for pushing the floating ring (400) to move towards the direction away from the valve plate (200);

wherein valve plate (200) rotation can drive floating ring (400) rotate with floating valve seat (300) sealing contact, first location step (110) be used for with floating valve seat (300) counterbalance, so that floating valve seat (300) can with floating ring (400) laminating is sealed.

2. The dual-floating bidirectional hard-seal rotary valve according to claim 1, wherein: the valve plate (200) is connected with the floating ring (400) through the limiting bolt (500); the elastic piece is a belleville spring (510), and the limiting bolt (500) is sleeved with the belleville spring (510).

3. A dual floating bi-directional hard seal rotary valve as claimed in claim 2 wherein: the edge of the valve plate (200) is provided with an installation step (210), the floating ring (400) is installed in the installation step (210), and the limiting bolt (500) penetrates through the floating ring (400) and is connected with the valve plate (200).

4. A dual floating bi-directional hard seal rotary valve according to claim 3 wherein: spacing bolt (500) include head (501), intermediate part (502) and connecting portion (503), intermediate part (502) both ends are connected respectively head (501) with connecting portion (503), connecting portion (503) stretch into in valve plate (200) and with valve plate (200) threaded connection, floating ring (400) cover is located intermediate part (502) can be followed intermediate part (502) remove, head (501) are used for right floating ring (400) are spacing.

5. The dual-floating bidirectional hard-seal rotary valve according to claim 4, wherein: the floating ring (400) comprises a vertical part (410) and a horizontal part (420), and the vertical part (410) is fixedly connected with the horizontal part (420); the horizontal part (420) is attached to the valve plate (200), and the vertical part (410) is connected with the valve plate (200) through the limiting bolt (500).

6. The dual-floating bidirectional hard-seal rotary valve according to claim 5, wherein: vertical portion (410) orientation the one side of valve plate (200) is equipped with holding tank (411), belleville spring (510) one end embedding in holding tank (411) and with holding tank (411) offset, the other end with valve plate (200) offset.

7. The dual-floating bidirectional hard-seal rotary valve according to claim 1, wherein: the middle part of the valve shaft (130) is connected with the valve plate (200), and one end of the valve shaft (130) extends out of the valve body (100) and is connected with a driving device for driving the valve body to rotate.

8. The dual-floating bidirectional hard-seal rotary valve according to claim 7, wherein: the valve body (100) is provided with an upper shaft hole (140) and a lower shaft hole (150) which are used for the valve shaft (130) to pass through, the valve plate (200) is provided with a through hole which is used for the valve shaft (130) to pass through, a pin (220) is radially arranged in the through hole in a penetrating mode, and the valve shaft (130) is connected with the valve plate (200) through the pin (220).

9. A dual floating bi-directional hard seal rotary valve according to claim 8 wherein: and an end cover (160) used for sealing the lower shaft hole (150) is installed at the end part of the lower shaft hole (150).

10. A dual floating bi-directional hard seal rotary valve according to claim 9 wherein: lower shaft hole (150) inner wall is equipped with the retaining ring groove, install jump ring (151) in the retaining ring groove, jump ring (151) are used for right valve shaft (130) carry out the axial spacing.