JP2022531824A - Expandable metal seal valve and its drive - Google Patents

Abstract

The present invention discloses an expandable metal seal valve and its driving device, which relates to the field of valves, and includes a valve stem, a straight stroke driving mechanism, a rotary driving mechanism and a double action switch mechanism, wherein the straight stroke driving mechanism is movable. one end is fitted to the valve stem and drives its up and down linear motion, the movable end of the rotary drive mechanism is fitted to the valve stem and drives its forward and reverse rotation, and the straight stroke of the valve stem; Both forward and reverse rotation angles are controlled by the double action switch mechanism. The present invention has the advantages of good operational stability and a high degree of automation. [Selection drawing] Fig. 1

Description

The present invention relates to the valve field, and specifically to an expandable metal seal valve and a driving device thereof.

The expandable metal seal valve is a combination of a gate valve and a ball valve structure and operating principle, the valve core is combined with three parts, the middle is a wedge cone, and both sides are two valve plates via a T-shaped groove. It is connected to and is called a combination valve core. The wedge cone and the valve stem are integrally connected via a screw and a horizontal pin, and can be moved up and down and rotated along with the valve stem. The wedge cone and valve plate are connected via a guide rail on the 5 degree slope of the wedge cone, which converges as the wedge cone rises, expands to both sides as the wedge cone descends, and abuts on the sealing surface of the valve base. be able to. Due to the limitations of the upper and lower limit rings, the valve plate cannot rise or fall with the wedge cone, but expands or contracts in a plane perpendicular to the valve stem, and rotates with the wedge cone. I can only do it. When the valve plate contracts, the sealing surface of the valve plate and the sealing surface of the valve base are separated, and when the valve core assembly rises and rotates, there is no friction between the seal pairs, which saves the trouble of opening and prolongs the service life of the valve. .. When the valve core assembly rotates 90 degrees, the through hole in the middle of the wedge cone and the flow path hole of the valve block match, and the valve is in the open state. The valve stem rotates 90 degrees in reverse, the valve plate is in the closed position, the wedge cone moves down with the valve stem, the valve plate extends to both sides and presses against the sealing surface of the valve base, the valve's Achieve closure. In the prior art, there is no drive device that simultaneously controls the raising and lowering of the valve stem and the rotation of 90 degrees, which is very inconvenient to operate.

In order to overcome the shortage of background techniques, the present invention provides a drive device for an expandable metal seal valve having excellent operational stability and a high degree of automation.

The technical solution adopted by the present invention is as follows, which is a drive device for an expandable metal seal valve, including a valve stem, a straight stroke drive mechanism, a rotation drive mechanism, and a double action switch mechanism. The movable end of the straight stroke drive mechanism is fitted to the valve stem and drives its vertical linear motion, and the movable end of the rotary drive mechanism is fitted to the valve stem and drives its forward rotation and reverse rotation. The straight stroke and the forward and reverse rotation angles of the valve stem are both controlled by the double action switch mechanism.

The straight stroke drive mechanism includes an upper cylinder block, an upper cylinder seat, an upper cylinder head, and a piston, and the upper cylinder head and the upper cylinder seat are both fitted to the valve stem, and each of them is the first. The upper and lower ends of the upper cylinder block are connected to the outer periphery of the upper cylinder head and the upper cylinder seat by seals to form one cavity, and the inner ring of the piston is attached to the valve stem. The outer ring is slidably engaged with the inner wall of the upper cylinder block by a seal.

A bearing seat is provided at a position corresponding to the piston of the valve stem, a bearing is provided between the bearing seat and the inner ring of the piston, and the bearing seat is further provided with a locknut that abuts on the upper surface of the bearing.

The rotation drive mechanism includes a lower cylinder seat, a lower cylinder block, a connection sleeve, and a rotation component attached to the connection sleeve, and the upper and lower ends of the lower cylinder block are on the outer periphery of the upper cylinder seat and the lower cylinder seat, respectively. They are connected by a seal to form a cavity, the connecting sleeve is fitted to the valve stem and both are connected in tandem, the rotating component comprises a plurality of pairs of fixing plates and rotating plates, said fixing plate. And the rotating plate are both vertically and radially attached with a seal between the connecting sleeve and the lower cylinder block, one end of the rotating plate is fixedly connected to the connecting sleeve and the other end is the lower cylinder. A second entry / exit hole is provided through the fixing plate and the lower cylinder block by being slidably engaged with the inner wall of the block by a seal, and a variable-sized pressure chamber is formed between the fixing plate and the rotating plate. ..

The second entry / exit hole is composed of two first screw holes in the lower cylinder block and two second screw holes in the fixing plate, and the two first screw holes are provided in the vertical direction and the two second holes are provided. There are one-to-one correspondences with the two screw holes, and through holes communicating with the second screw holes are provided on both side surfaces of the fixing plate.

A plurality of guide grooves are provided in the inner hole of the connection sleeve in the vertical direction and penetrate vertically, and the valve stem is provided with a plurality of guide keys that are slidably engaged with the guide grooves.
Adjusting screws are provided on both the left and right sides of the fixing plate.

The outer surface of the lower cylinder block is covered with a pressing ring, the inner wall of the pressing ring is provided with two horizontally provided ventilation ring grooves, and a rubber seal plate is provided between the ventilation ring groove and the outer surface of the lower cylinder block. A ring-shaped mounting groove is provided at the mouth end of the ventilation ring groove, and a mounting groove for mounting a rubber seal plate is provided. The rubber seal plate is provided with a through hole corresponding to a first screw hole, and the pressing ring is provided with ventilation. A pipe joint that communicates with the ring groove is provided.

The double action switch mechanism is
A positioning board that is fixedly attached to the tip of the valve stem and is provided with a positioning bar that extends outward in the circumferential direction.
An elevating switch sheet that is vertically fixed and attached to the upper surface of the upper cylinder head,
Includes a pair of rotary switch seats that are secured and attached to the top surface of the upper cylinder head.
A first proximity switch is provided on the elevating switch sheet that is vertically opposed and has an appropriate spacing, the positioning panel is located between two first proximity switches, and each rotary switch sheet. In each case, one second proximity switch is provided, and the rotation range of the positioning bar is between the two second proximity switches.

A bracket for attaching the lower cylinder seat is provided below the lower cylinder seat, and the bracket, the lower cylinder seat and the upper cylinder head are fixedly connected via a tie rod and a nut.

An expandable metal sealed valve that includes a valve head, a combination valve core, a valve seat, and a valve block, further attached to the valve head with the above drive, the combination valve core with a central wedge cone and both sides. The wedge cone and the valve plate are integrally connected via a screw and a lateral pin, and can be moved up and down and rotated along with the valve stem.

The beneficial effects of the present invention are as follows.
1. In this technical solution, the straight stroke drive mechanism controls the vertical movement of the valve stem, the rotary drive mechanism controls the forward and reverse rotation around the axis of the valve stem, and the double action switch mechanism controls the straight rotation. It controls the opening and closing of the stroke drive mechanism and the rotation drive mechanism, is easy to operate, and has high control accuracy.
2. The straight stroke drive mechanism in this technical solution realizes the ascending or descending motion of the piston by selecting one from the two cavities above and below the piston and pressurizing it, and the valve when the piston moves. It drives the synchronous ascent and descent of the stem, has a simple structure, and has excellent operational stability.
3. The rotary drive mechanism in the present technical solution pressurizes the fixed plate and the second entrance / exit hole in the cylinder block, so that the cavity between the rotary plate and the fixed plate changes in pressure, and the rotary plate becomes. As soon as it approaches or moves away from the fixing plate, it drives the rotation of the valve stem via the connecting sleeve, and has high rotation accuracy and excellent operational stability.

It is a structural schematic diagram of the expansion type metal seal valve of an Example of this invention. It is sectional drawing of the AA part of FIG. It is sectional drawing of the BB portion of FIG. It is the A arrow view of FIG.

Hereinafter, embodiments of the present invention will be further described with reference to the drawings.

As shown in the figure, the drive device for an expandable metal seal valve includes a valve stem 1, a straight stroke drive mechanism 2, a rotation drive mechanism 3, and a double action switch mechanism 4, and the straight stroke drive mechanism. The movable end of 2 is fitted to the valve stem 1 and drives its vertical linear motion, and the movable end of the rotation drive mechanism 3 is fitted to the valve stem 1 and drives its forward and reverse rotations. The straight stroke and the forward rotation and the reverse rotation angle of the valve stem 1 are both controlled by the double action switch mechanism 4, and the present technical solution controls the vertical movement of the valve stem by the straight stroke drive mechanism, and further. The rotation drive mechanism controls the forward and reverse rotation around the axis of the valve stem, and the double action switch mechanism controls the opening and closing of the straight stroke drive mechanism and the rotation drive mechanism. The straight stroke drive mechanism 2 and the rotary drive mechanism in this embodiment adopt a pneumatic structure, and the following contents introduce a technical solution means for adopting the pneumatic structure.

The straight stroke drive mechanism 2 includes an upper cylinder block 21, an upper cylinder seat 22, an upper cylinder head 23, and a piston 24, and the upper cylinder head 23 and the upper cylinder seat 22 are all fitted to the valve stem 1. Both are combined and each have a first entry / exit hole 25, and the upper and lower ends of the upper cylinder block 21 are connected to the outer periphery of the upper cylinder head 23 and the upper cylinder sheet 22 by seals to form one cavity. The inner ring of the piston 24 is attached to the valve stem 1, and the outer ring thereof is slidably engaged with the inner wall of the upper cylinder block 21 by a seal, and the straight stroke drive mechanism in the present technical solution is above and below the piston. By selecting one of the two cavities and pressurizing it, the ascending or descending motion of the piston is realized, and when the piston moves, the synchronous ascent and descent of the valve stem is driven, the structure is simple, and the operation stability is excellent. The piston is fitted to the valve stem and drives its vertical rotation, but both can rotate opposite each other.

A bearing seat 26 is provided at a position corresponding to the piston 24 of the valve stem 1, a bearing 27 is provided between the bearing seat 26 and the inner ring of the piston 24, and the bearing seat 26 abuts on the upper surface of the bearing 27. A lock nut 28 is further provided to prevent the piston from rotating when the valve stem rotates, increase frictional force, and a loosening prevention washer is attached between the two lock nuts, the bearing in this embodiment is flat. Use roller bearings.

The rotation drive mechanism 3 includes a lower cylinder seat 31, a lower cylinder block 32, a connection sleeve 33, and a rotation component attached to the connection sleeve 33, and the upper and lower ends of the lower cylinder block 32 are upper cylinder seats 22 respectively. And the lower cylinder seat 31 are connected by a seal to form one cavity, the connection sleeve 33 is fitted to the valve stem 1 and both are interlocked and connected, and the rotating component is fixed in a plurality of pairs. A plate 34 and a rotating plate 35 are included, and both the fixing plate 34 and the rotating plate 35 are vertically and radially sealed between the connecting sleeve 33 and the lower cylinder block 32, respectively, and the rotating plate 35. One end is fixedly connected to the connection sleeve 33 and the other end is slidably engaged with the inner wall of the lower cylinder block 32 by a seal, and a second entry / exit hole 36 penetrating the fixed plate 34 and the lower cylinder block 32 is provided. A variable size pressure chamber is formed between the fixed plate 34 and the rotating plate 35, and the rotary drive mechanism in the present technical solution pressurizes the fixed plate and the second entry / exit hole in the cylinder block. As the pressure changes, the cavity between the rotating plate and the fixing plate drives the rotation of the valve stem through the connecting sleeve as soon as the rotating plate approaches or separates from the fixing plate, resulting in high rotational accuracy and operation. Excellent stability.

Further, there are three sets of the fixed plate and the rotating plate in this embodiment, and they are provided evenly distributed in the circumferential direction of the valve stem.

The second entry / exit hole 36 is composed of two first screw holes 361 of the lower cylinder block 32 and two second screw holes 362 of the fixing plate 34, and the two first screw holes 361 are in the vertical direction. The through holes 341 provided and corresponding to one-to-one with the two second screw holes 362 and communicating with the second screw holes 362 are provided on both side surfaces of the fixing plate 34, respectively, and the second entrance / exit holes are provided. There are two sets, one set is the intake hole, one set is the exhaust hole, and as shown in FIG. 2, the rotating plate on one side of the first fixing plate is separated from the first fixing plate through the intake hole. It approaches the second fixing plate and expels the gas between the rotating plate and the second fixing plate from the second fixing plate.

A plurality of guide grooves 331 provided in the inner hole of the connection sleeve 33 in the vertical direction and penetrating vertically are provided, and a plurality of guide keys 332 that are slidably engaged with the guide grooves 331 are provided in the valve stem 1. The guide groove penetrates up and down, and the valve stem can move up and down freely in the connecting sleeve, but it is restricted by the connecting sleeve during rotation, and both rotate in conjunction with each other.
Adjusting screws 342 are provided on both the left and right sides of the fixing plate 34, and the rotation range of the rotating plate is controlled by screwing the mounting depth of the adjusting screw, thereby adjusting the rotation angle of the valve stem.

The outer surface of the lower cylinder block 32 is covered with a pressing ring 37, and two ventilation ring grooves 371 provided horizontally on the inner wall of the pressing ring 37 are provided with the ventilation ring groove 371 and the outer surface of the lower cylinder block 32. A rubber seal plate 38 is provided between the two, and a ring-shaped mounting groove 372 is provided at the mouth end of the ventilation ring groove 371 and a mounting groove 372 for mounting the rubber seal plate 38 is provided. The rubber seal plate 38 is provided with a first screw hole 361. A through port 381 corresponding to the above is provided, and the pressure ring 37 is provided with a pipe joint 373 that communicates with the ventilation ring groove 371. The fixing plate is to expand into three pressure chambers at the same time.

The double action switch mechanism 4 is
A positioning plate 41 fixed to the tip of the valve stem 1 and provided with a positioning bar 42 extending outward in the circumferential direction.
An elevating switch sheet 43 fixedly attached to the upper surface of the upper cylinder head 23 in the vertical direction,
Including a pair of rotary switch seats 44 fixedly attached to the upper surface of the upper cylinder head 23.
A first proximity switch 431 is provided on the elevating switch sheet 43 so as to face each other in the vertical direction and have an appropriate spacing, and the positioning board 41 is located between two first proximity switches 431. Each rotary switch sheet 44 is provided with one second proximity switch 441, and the rotation range of the positioning bar 42 is between the two second proximity switches 441.
When the valve stem goes up or down, the positioning panel is within the range of the two first proximity switches, and when approaching the first proximity switch, it signals the controller and the controller further controls the inflator. And expand into each pressure chamber,
When the valve stem rotates forward and backward, the rotation range of the positioning bar lies between the two second proximity switches, and the principle of operation is the same as that of the first proximity switch, transmitting a signal to the control device.

A bracket 5 for attaching the lower cylinder seat 31 is provided below the lower cylinder seat 31, and the bracket 5, the lower cylinder seat 31 and the upper cylinder head 23 are fixedly connected via a tie rod and a nut.

An expandable metal seal valve including a valve head 6, a combination valve core 9, a valve seat 7, and a valve block 8, further attached to the valve head 6 by the above drive device, the combination valve core 9 being It is composed of a central wedge cone 91 and valve plates 92 on both sides, the wedge cone 91 and the valve plate 92 are connected via a T-shaped groove, and the wedge cone 91 and the valve stem 1 are integrated via a screw and a horizontal pin. Can be moved up and down and rotated with the valve stem 1, the valve in the present technical solution has all the above technical effects.

In the description of the present invention, the terms "center", "vertical", "horizontal", "top", "bottom", "front", "rear", "left", "right", and "vertical" should be noted. , "Horizontal", "Top", "Bottom", "Inside", "Outside", etc., are based on the orientation or positional relationship shown in the drawings, and the present invention will be described and described. It is only for the sake of simplification, and does not indicate or imply that the device or element must have a specific orientation and must be constructed and operated in a specific orientation, and therefore the book. It cannot be understood as a limitation of the invention. Moreover, the terms "first" and "second" are used only to explain the purpose and should not be understood to indicate or imply relative importance.

In the description of the present invention, the terms "mounting", "connecting" and "connecting" should be understood in a broad sense, unless otherwise specified and limited, and may be, for example, a fixed connection and may be detached. It may be a possible connection or an integral connection, a mechanical connection or an electrical connection, a direct connection, an indirect connection via an intermediary, or a connection inside two elements. May be good. For those skilled in the art, the particular meaning of the above terms in the present invention can be understood in a particular context. In the description of the present invention, "plurality" means two or two or more unless otherwise specified.

As can be understood by those skilled in the art, the present invention has been described based on the above specific embodiments, but the technical idea of the present invention is not limited to the present invention, and the idea of the present invention is used. Any changes should be included within the scope of the claims.

Claims (10)

An expandable metal seal valve drive device including a valve stem (1), a straight stroke drive mechanism (2), a rotary drive mechanism (3), and a double action switch mechanism (4). The movable end of the drive mechanism (2) is fitted to the valve stem (1) and drives its vertical linear motion, and the movable end of the rotary drive mechanism (3) is fitted to the valve stem (1). The forward rotation and the reverse rotation are driven, and the straight stroke and the forward rotation and the reverse rotation angle of the valve stem (1) are both controlled by the double action switch mechanism (4).
An expandable metal seal valve drive that features. The straight stroke drive mechanism (2) includes an upper cylinder block (21), an upper cylinder seat (22), an upper cylinder head (23), and a piston (24), and the upper cylinder head (23) and the upper part. Each of the cylinder seats (22) is fitted to the valve stem (1) and each has a first entry / exit hole (25), and the upper and lower ends of the upper cylinder block (21) are upper cylinder heads (each). 23) and the outer periphery of the upper cylinder seat (22) are connected by a seal to form one cavity, the inner ring of the piston (24) is attached to the valve stem (1), and the outer ring thereof is the upper cylinder block (23). 21) Sliding and engaging with the inner wall with a seal,
The drive device for an expandable metal seal valve according to claim 1. A bearing seat (26) is provided at a position corresponding to the piston (24) of the valve stem (1), and a bearing (27) is provided between the bearing seat (26) and the inner ring of the piston (24). The bearing sheet (26) is further provided with a locknut (28) that abuts on the upper surface of the bearing (27).
2. The drive device for an expandable metal seal valve according to claim 2. The rotation drive mechanism (3) includes a lower cylinder seat (31), a lower cylinder block (32), a connection sleeve (33), and a rotation component attached to the connection sleeve (33), and the lower cylinder block. The upper and lower ends of (32) are connected to the outer periphery of the upper cylinder seat (22) and the lower cylinder seat (31) by seals to form one cavity, and the connection sleeve (33) is attached to the valve stem (1). Fitted and connected together, the rotating component comprises a plurality of pairs of fixed plates (34) and rotating plates (35), the fixed plate (34) and the rotating plate (35), respectively. A vertical and radial seal is attached between the connecting sleeve (33) and the lower cylinder block (32) so that one end of the rotating plate (35) is fixedly connected to the connecting sleeve (33) and the other end. Is slidably engaged with the inner wall of the lower cylinder block (32) by a seal, and a second entry / exit hole (36) penetrating the fixing plate (34) and the lower cylinder block (32) is provided. A variable size pressure chamber is formed between (34) and the rotating plate (35).
2. The drive device for an expandable metal seal valve according to claim 2. The second entry / exit hole (36) is composed of two first screw holes (361) in the lower cylinder block (32) and two second screw holes (362) in the fixing plate (34). The first screw hole (361) is provided in the vertical direction and corresponds one-to-one with the two second screw holes (362), and the second screw holes (362) are provided on both side surfaces of the fixing plate (34). ) Are provided with through holes (341), respectively.
The drive device for an expandable metal seal valve according to claim 4. A plurality of guide grooves (331) provided in the inner hole of the connection sleeve (33) in the vertical direction and penetrating vertically are provided, and the valve stem (1) is slidably engaged with the guide grooves (331). Guide key (332) is provided,
Adjusting screws (342) are provided on both the left and right sides of the fixing plate (34).
The drive device for an expandable metal seal valve according to claim 4. The outer surface of the lower cylinder block (32) is covered with a pressing ring (37), and two ventilation ring grooves (371) horizontally provided on the inner wall of the pressing ring (37) are provided, and the ventilation ring groove (371) is provided. A rubber seal plate (38) is provided between the outer surface of the lower cylinder block (32) and the 371), and is provided in a ring shape at the mouth end of the ventilation ring groove (371) to attach the rubber seal plate (38). A mounting groove (372) is provided, the rubber seal plate (38) is provided with a through hole (381) corresponding to the first screw hole (361), and the pressing ring (37) is provided with a ventilation ring groove (371). A connecting pipe joint (373) is provided,
The drive device for an expandable metal seal valve according to claim 5. The double action switch mechanism (4) is
A positioning plate (41) fixed to the tip of the valve stem (1) and provided with a positioning bar (42) extending outward in the circumferential direction.
An elevating switch sheet (43) fixedly attached to the upper surface of the upper cylinder head (23) in the vertical direction, and a lift switch sheet (43).
Including a pair of rotary switch seats (44) fixedly attached to the top surface of the upper cylinder head (23).
A first proximity switch (431) is provided on the elevating switch sheet (43) so as to face each other in the vertical direction and have an appropriate spacing, and the positioning panel (41) is provided with two first proximity switches (41). Located between 431), each rotary switch sheet (44) is provided with one second proximity switch (441), and the rotation range of the positioning bar (42) is two second proximity switches (441). Between 441),
2. The drive device for an expandable metal seal valve according to claim 2. A bracket (5) for attaching the lower cylinder seat (31) is provided below the lower cylinder seat (31), and the bracket (5), the lower cylinder seat (31) and the upper cylinder head (23) have tie rods and nuts. Fixed connection via
The drive device for an expandable metal seal valve according to claim 4. An expandable metal seal valve including a valve head (6), a combination valve core (9), a valve seat (7), and a valve block (8), further comprising claims 1 to 1 to the valve head (6). The drive according to any one of 9 is attached, and the combination valve core (9) is composed of a central wedge cone (91) and valve plates (92) on both sides, and the wedge cone (91) and the valve plate. (92) is slidably connected via a T-shaped groove, and the wedge cone (91) and the valve stem (1) are integrally connected via a screw and a horizontal pin, and move up and down and rotate along with the valve stem (1). be able to,
An expandable metal seal valve that features that.

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