CN210531667U - Valve rod operating device of forced sealing valve - Google Patents

Abstract

The utility model relates to a valve rod operating device of a forced sealing valve, which comprises a valve body, a valve rod and an upper valve clack driving piece, wherein the valve rod drives the upper valve clack driving piece to rotate in the rotation stroke of opening and closing the valve, and the valve rod rotates relative to the upper valve clack driving piece at the closing position of the valve to drive the upper valve clack driving piece to move along the axis of the valve rod; the valve rod drives the upper valve flap driving piece to rotate through the driving ring, and the valve rod drives the driving ring to rotate through the locking body. The utility model has the advantages that: the valve rod operating device with the locking body is adopted, so that the valve clack can be driven to rotate between the opening position and the closing position, the driving mechanism can be driven to move along the axial direction, the opening or closing operation of the forced sealing valve is completed in one rotation stroke, the structure is compact, and the opening and closing operation of the valve is convenient and reliable.

Description

Valve rod operating device of forced sealing valve

Technical Field

The utility model belongs to force the sealing valve, especially, relate to a force sealing valve rod operating means.

Background

The DBB forced sealing valve has outstanding excellent sealing performance, and has severe requirements on the sealing performance of the valve in important application occasions such as oil and natural gas transmission pipelines. The structure and the operating device of the forced sealing valve are much more complicated than the common valve. A DBB forced sealing valve adopts a forced sealing valve clack, and pushes the sealing valve clack to press a valve seat in an inclined plane driving mode through a driving mechanism moving vertically to realize forced sealing. In order to achieve a good sealing effect, an operating device matched with the valve is needed, and due to structural and functional characteristics and user habits, the valve rod is required to drive the sealing valve clack to rotate between the opening position and the closing position and drive the driving mechanism to vertically move in one rotation stroke, and the operating device for the forced sealing valve needs to deal with the challenge of complex design.

Disclosure of Invention

The utility model aims at providing a forced seal valve rod operating means's technical scheme realizes opening and close operation and the forced seal operation of DBB forced seal valve.

In order to realize the purpose, the technical scheme of the utility model is that: a valve rod operating device of a forced sealing valve comprises a valve body, a valve rod and an upper valve clack driving piece, wherein the valve rod drives the upper valve clack driving piece to rotate in the opening and closing rotation stroke of the valve; the valve rod drives the upper valve flap driving piece to rotate through the driving ring, and the valve rod drives the driving ring to rotate through the locking body.

Furthermore, in order to realize the forced sealing operation of the valve, the inner hole of the driving ring is in rotating fit with the valve rod, the outer circle of the driving ring is in rotating fit with the valve body, the ring wall of the driving ring is provided with a locking body retaining hole, the valve rod is provided with a locking body driving groove with the axial position corresponding to the locking body retaining hole, and the valve body is provided with a locking groove with the axial position corresponding to the locking body retaining hole.

Further, the upper flap driving member is held in the locking member holding hole and the locking member driving groove during the rotational stroke of opening and closing the valve; the lock body is held in the lock body holding hole and the lock groove when the valve stem drives the upper valve flap driver to move along the valve stem axis.

Further, the locking body is a cylinder having an axis parallel to the valve stem, the locking body driving groove of the valve stem is an arc-shaped groove, and the locking recess of the valve body is an arc-shaped groove.

Furthermore, in order to ensure that the valve is opened, an opening shifting block is arranged at the upper end of the driving ring, an opening shifting rod is arranged on the valve rod, and the opening shifting rod shifts the opening shifting block when the valve rod drives the upper valve flap driving piece to rotate towards the opening direction.

Furthermore, in order to enable the upper valve flap driving piece to rotate along with the driving ring and move axially, the lower end of the driving ring is provided with a shifting claw, the upper valve flap driving piece is provided with a connecting groove corresponding to the shifting claw of the driving ring, the shifting claw is inserted into the connecting groove to drive the upper valve flap driving piece to rotate, and the connecting groove slides along the shifting claw.

Furthermore, in order to control the rotation stroke of the upper valve flap driving member, the valve body is provided with a stroke control groove for controlling the rotation stroke of the driving ring, and the driving ring is provided with a stroke stop corresponding to the stroke control groove.

Furthermore, in order to realize the opening and closing operation and the forced sealing of the valve, the forced sealing valve is provided with a lower valve clack driving piece and a valve core, the valve rod drives the valve core to synchronously rotate, when the valve rod rotates relative to the upper valve clack driving piece, the valve core drives the upper valve clack driving piece and the lower valve clack driving piece to move along the axis of the valve rod, and the upper valve clack driving piece and the lower valve clack driving piece drive the sealing valve clack to press against the valve seat.

Further, in order to effectively drive the sealing valve flap to achieve forced sealing, the upper valve flap driving member is provided with an upper driving track for driving the sealing valve flap, the upper driving track is inclined to the rotation axis of the valve core, the lower valve flap driving member is provided with a lower driving track for driving the sealing valve flap, and the lower driving track is inclined to the rotation axis of the valve core; the valve core rotates to drive the upper valve clack driving piece and the lower valve clack driving piece to move along the rotation axis of the valve core in opposite directions.

The utility model has the advantages that: the valve rod operating device with the locking body is adopted, so that the valve clack can be driven to rotate between the opening position and the closing position, the driving mechanism can be driven to vertically move, the opening or closing operation of the DBB forced sealing valve is completed in one rotation stroke, the structure is compact, and the opening and closing operation of the valve is convenient and reliable.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic diagram of a forced sealing valve according to the present invention, in a side sectional view;

fig. 2 is an exploded view of the valve structure of the present invention;

FIG. 3 is an exploded view of the valve stem operating device of the present invention;

fig. 4 is an exploded view of the valve stem, upper bonnet and drive ring structure of the present invention;

FIG. 5 is a sectional view A-A of FIG. 1 illustrating the structural relationship of the locking body, valve stem, drive ring and valve cover;

FIG. 6 is a sectional view taken along line B-B of FIG. 1, illustrating the structural relationship of the opening lever of the valve stem and the opening lever block of the drive ring;

fig. 7 is an operation schematic diagram of the valve rod operating device viewed from above by the operating device of the present invention, with the valve in an open state;

fig. 8 is an operation schematic diagram of the valve rod operating device viewed from above, wherein the valve rod rotates in the closing direction to drive the upper flap driving member to rotate to the closed position;

fig. 9 is an operation schematic diagram of the valve rod operating device viewed from above, the valve rod continues to rotate in the closing direction, the locking body is separated from the locking body driving groove, and the valve rod drives the upper valve clack driving member and the lower valve clack driving member to move axially;

fig. 10 is an operation schematic diagram of the valve rod operating device observed from above by the operating device of the present invention, the valve rod rotates to the opening direction, and the opening shift lever shifts the opening shift block;

fig. 11 is the utility model discloses the operation is followed the top and is observed valve rod operating means's operation schematic diagram, and the valve rod rotates to the continuation direction of opening, and the locking recess is deviate from to the locking body, and the valve rod drives the upper flap driving piece and rotates to the direction of opening.

Detailed Description

Referring to fig. 1 to 4, a valve stem operating device for a positive seal valve comprises a valve body 10, a valve stem 20 and an upper flap driving member 30, wherein the valve stem drives the upper flap driving member to rotate in a rotating stroke of opening (such as the position of fig. 7) and closing (such as the position of fig. 8) of the valve, and the valve stem also rotates relative to the upper flap driving member in a closing position of the valve to drive the upper flap driving member to move along a valve stem axis; the valve rod drives the upper valve flap driving piece to rotate through the driving ring 50, and the valve rod drives the driving ring to rotate through the locking body.

The inner hole 51 of the driving ring is matched with the valve rod in a rotating mode, the outer circle 52 of the driving ring is matched with the valve body in a rotating mode, the annular wall of the driving ring is provided with a locking body retaining hole 53, the valve rod is provided with a locking body driving groove 21 with the axial position corresponding to the locking body retaining hole, and the valve body is provided with a locking groove 11 with the axial position corresponding to the locking body retaining hole.

The upper valve clack driving piece is used for driving the upper valve clack to move in the opening and closing rotation strokes of the valve, and the locking body is kept in the locking body keeping hole and the locking body driving groove; the lock body is held in the lock body holding hole and the lock groove when the valve stem drives the upper valve flap driver to move along the valve stem axis.

The locking body is a cylinder with an axis parallel to the valve rod, the locking body driving groove of the valve rod is an arc-shaped groove, and the locking groove of the valve body is an arc-shaped groove.

An opening shifting block 54 is arranged at the upper end of the driving ring, an opening shifting rod 22 is arranged on the valve rod, and the opening shifting rod shifts the opening shifting block when the valve rod drives the upper valve flap driving piece to rotate towards the opening direction.

The lower end of the driving ring is provided with a shifting claw 55, the upper valve clack driving piece is provided with a connecting groove 31 corresponding to the shifting claw of the driving ring, the shifting claw is inserted into the connecting groove to drive the upper valve clack driving piece to rotate, and the connecting groove slides along the shifting claw.

The valve body is provided with a stroke control groove 15 for controlling the rotation stroke of the driving ring, and the driving ring is provided with a stroke stop 56 corresponding to the stroke control groove.

The forced sealing valve is provided with a lower valve clack driving piece 40 and a valve core 70, the valve rod drives the valve core to synchronously rotate, when the valve rod rotates relative to the upper valve clack driving piece, the valve core drives the upper valve clack driving piece and the lower valve clack driving piece to move along the axis of the valve rod, and the upper valve clack driving piece and the lower valve clack driving piece drive a sealing valve clack 80 to press against a valve seat 90.

The upper flap drive is provided with an upper drive track 32 that drives the sealing flap, the upper drive track being inclined to the axis of rotation of the valve spool, the lower flap drive is provided with a lower drive track 41 that drives the sealing flap, the lower drive track being inclined to the axis of rotation of the valve spool; the valve core rotates to drive the upper valve clack driving piece and the lower valve clack driving piece to move along the rotation axis of the valve core in opposite directions.

The first embodiment is as follows:

a valve stem operating device of a forced sealing valve comprises a valve body 10, a valve stem 20, an upper valve flap driving member 30, a lower valve flap driving member 40 and a valve core 70.

The valve body of the embodiment is a valve body of a broad concept, and comprises a valve body 10, wherein the valve body is cylindrical, a valve cover 1A is arranged on the upper side of the valve body, the valve cover is provided with a through shaft hole 14, and the valve rod is arranged in the shaft hole. An upper bearing block 1B is arranged on the upper side of the valve body, a lower bearing block 1C is arranged on the lower side of the valve body, and the upper bearing block and the lower bearing block are respectively provided with a bearing hole. The valve body 10, the valve cover 1A, the upper bearing block 1B and the lower bearing block 1C are fixedly connected into a whole to form a generalized valve body.

The valve core is arranged in the valve body through the bearing holes of the upper bearing block and the lower bearing block, a flow channel 71 is arranged in the center of the valve core, the flow channel is a circular through hole, and the diameter D of the flow channel is a round hole which is the same as the drift diameter of the pipeline, so that the medium in the pipeline flows smoothly. The upper end of the valve core is provided with an upper driving shaft 72, the lower end of the valve core is provided with a lower driving shaft 73, the upper driving shaft and the lower driving shaft are provided with threads, and the screwing directions of the upper driving shaft and the lower driving shaft are opposite. An inner hexagonal hole 74 is formed in the top end of the upper driving shaft, a hexagonal prism 23 corresponding to the inner hexagonal hole of the valve core is arranged at the lower end of the valve rod, and the valve rod drives the valve core to rotate synchronously through the hexagonal prism.

The upper and lower flap driving pieces 30 and 40 are respectively disposed at both sides of the flow passage of the valve spool. The upper valve clack driving part is provided with a screw hole 33 in threaded connection with an upper driving shaft of the valve core, the lower valve clack driving part is provided with a screw hole 42 in threaded connection with a lower driving shaft of the valve core, the lower valve clack driving part is provided with four guide holes 43, and the upper valve clack driving part is provided with four guide posts 34 correspondingly inserted into the guide holes, so that the upper valve clack driving part and the lower valve clack driving part keep synchronous rotation and coaxial movement. When the valve rod rotates relative to the upper valve clack driving piece, the valve core drives the upper valve clack driving piece and the lower valve clack driving piece to move along the axis of the valve rod, and the valve core drives the upper valve clack driving piece and the lower valve clack driving piece to move in opposite directions through threads.

The upper and lower flap actuators drive the sealing flap 80 against the valve seat 90.

The upper drive rails 32 that drive the seal flaps 80 are provided on both sides of the upper flap drive, respectively, and are inclined inwardly at the upper ends to the axis of rotation of the valve spool. The lower driving rails 41 for driving the sealing valve clacks are respectively arranged on two sides of the lower valve clack driving piece, and the lower ends of the lower driving rails are inclined inwards to the rotation axis of the valve core. When the valve core rotates, the upper valve clack driving piece and the lower valve clack driving piece are driven to move along the rotation axis of the valve core in opposite directions, and when the upper valve clack driving piece and the lower valve clack driving piece move in a direction far away from the flow channel, the upper valve clack driving piece and the lower valve clack driving piece drive the sealing valve clack to press against the valve seat; when the upper valve clack driving piece and the lower valve clack driving piece move towards the direction approaching the flow passage, the upper valve clack driving piece and the lower valve clack driving piece drive the sealing valve clack to be separated from the valve seat. Go up drive track and drive track down and can adopt the guide rail of multiple structure, like rectangle track, cylinder track etc. this embodiment adopts the forked tail track, and the forked tail track has compacter structure, and more steady transmission function.

The forced sealing valve of the embodiment completes the opening or closing operation of the forced sealing valve in one rotation stroke of the valve rod. The valve stem rotates the upper flap actuator through a rotational path between an open position (as shown in fig. 7) and a closed position (as shown in fig. 8), and the valve stem also rotates relative to the upper flap actuator in the closed position of the valve to move the upper and lower flap actuators along the axis of the valve stem.

The valve rod drives the upper valve clack driving piece to rotate through the driving ring 50, an inner hole 51 of the driving ring is in rotating fit with the valve rod, an outer circle 52 of the driving ring is in rotating fit with the valve body (the valve cover 1A), a locking body retaining hole 53 is formed in the ring wall of the driving ring, and a locking body 60 is arranged in the locking body retaining hole. The locking body is a cylinder with an axis parallel to the valve stem.

The valve stem is provided with a locking body drive slot 21 axially positioned in correspondence with the locking body retaining bore, the locking body drive slot being an arcuate slot having an axis parallel to the axis of the valve stem, the locking body drive slot having a depth S1 equal to the radius r of the locking body. The valve body is provided with a locking recess 11 in axial position corresponding to the locking body retaining bore, the locking recess being an arcuate slot having an axis parallel to the axis of the valve stem, the locking recess having a depth S2 equal to the radius r of the locking body.

The upper end of the driving ring is provided with an opening shifting block 54, the valve rod is provided with an opening shifting rod 22, and the opening shifting rod can shift the opening shifting block to enable the driving ring to rotate towards the opening direction in the process that the valve rod rotates towards the opening direction (R2 direction).

The lower extreme of drive ring is equipped with pusher dog 55, and the last valve clack driving piece is equipped with the spread groove 31 that corresponds with the pusher dog of drive ring, and the pusher dog inserts and drives the rotation of last valve clack driving piece in the spread groove, and the spread groove can slide along the pusher dog, and the slip direction is on a parallel with the axis of valve rod.

The valve cover (as a part of the valve body) is provided with a stroke control groove 15 that controls the rotational stroke of the drive ring, and the drive ring is provided with a stroke stopper 56 corresponding to the stroke control groove. The stroke stop block is limited in the stroke control groove to rotate, and the rotation stroke of the driving ring is controlled to be 90 degrees.

The upper and lower flap actuators rotate through 90 ° of rotational travel for opening (position of fig. 7) and closing (position of fig. 8) of the valve. When the forced sealing valve is in an open state, the flow passage 71 of the valve core is aligned with the valve seat. As shown in fig. 7, the lock body 60 is held in the lock body holding hole 53 and the lock body driving groove 21, the position of the lock body is restricted by the inner hole of the bonnet 1A so that it cannot come out of the lock body driving groove, and the lock body locks the transmission relationship between the valve stem and the driving ring.

When the valve rod rotates from the opening position to the closing direction (R1 direction), the valve rod drives the driving ring to rotate towards the closing direction through the locking body, the driving ring drives the upper valve clack driving piece to rotate towards the closing direction, and the lower valve clack driving piece also rotates synchronously with the upper valve clack driving piece. The valve core rotates synchronously with the valve rod and the upper and lower valve clack driving pieces, the upper and lower driving shafts 72 and 73 of the valve core do not rotate relatively with the upper and lower valve clack driving pieces, and the upper and lower valve clack driving pieces do not move along the axial direction of the valve rod. The upper and lower flap drivers rotate 90 deg. to the closed position (as shown in fig. 8, also shown in fig. 5), the position of the locking body holding hole 53 (and the locking body) corresponds to the locking groove 11 of the bonnet, and at this time, the stroke stopper 56 of the driving ring touches the stroke control groove 15 of the bonnet, and the driving ring stops rotating. In the closed position, the upper and lower valve flap drive members drive the two sealing valve flaps to align with valve seats at the two ends of the valve, respectively. The valve rod continues to rotate towards the closing direction, the driving ring cannot rotate under the limit of the stroke, and as the locking body driving groove 21 of the valve rod is an arc-shaped groove, radial acting force is generated on the locking body, the locking body is pushed into the locking groove 11 of the valve cover, the locking body is separated from the locking body driving groove 21 and is kept in a space formed by the locking body keeping hole 53 and the locking groove 11 (as shown in figure 9), the transmission relation between the valve rod and the driving ring is released, and the locking relation between the driving ring and the valve cover is locked.

The valve rod continues to rotate towards the closing direction (as shown in fig. 9), at this time, the valve rod drives the valve core to rotate, the upper driving shaft 72 and the lower driving shaft 73 of the valve core and the upper valve clack driving piece and the lower valve clack driving piece rotate relatively, the upper valve clack driving piece moves upwards along the axis of the valve rod, the lower valve clack driving piece moves downwards along the axis of the valve rod, the sealing valve clack moves towards the valve seat under the guiding action of the inclined upper driving track and the inclined lower driving track, and the valve seat is pressed, so that the closing and forced sealing of the valve are realized.

When the valve is opened, the valve rod rotates towards the opening direction (R2 direction), because the driving ring is in a locked state, the upper driving shaft 72 and the lower driving shaft 73 of the valve core and the upper valve clack driving piece and the lower valve clack driving piece generate relative rotation (opposite to the rotation direction during the closing operation), the upper valve clack driving piece moves downwards along the axis of the valve rod, the lower valve clack driving piece moves upwards along the axis of the valve rod, under the guiding action of the inclined upper driving track and the inclined lower driving track, the sealing valve clack moves towards the direction of separating from the valve seat, and a gap is generated between the sealing valve clack and the valve seat.

As shown in fig. 10, when the locking body driving groove 21 of the valve stem is rotated to a position corresponding to the locking body holding hole 53 (i.e., the locking body), the opening lever 22 of the valve stem is brought into contact with the opening lever 54 of the driving ring, the valve stem dial driving ring is rotated in the opening direction, and the locking body holding hole 53 pushes the locking body to be rotated in the opening direction. Similarly, because the locking groove 11 of the valve cover is an arc-shaped groove, radial acting force is generated on the locking body to push the locking body to enter the locking body driving groove 21 of the valve rod, so that the locking body is separated from the locking groove 11 and is kept in a space formed by the locking body keeping hole 53 and the locking body driving groove 21, the locking relation between the valve cover and the driving ring is released, the transmission relation between the driving ring and the valve rod is locked, and the valve rod can drive the driving ring to rotate.

The valve rod drives the driving ring to rotate towards the opening position (as shown in fig. 11), the driving ring drives the upper valve clack driving piece and the lower valve clack driving piece to synchronously rotate along with the valve rod, and the valve core synchronously rotates along with the valve rod. The upper and lower drive shafts 72 and 73 of the valve core and the upper and lower flap drivers do not rotate relative to each other, so that the seal flap maintains a gap with the valve seat. The upper flap driving member and the lower flap driving member rotate 90 degrees in the opening direction to reach the opening position (as shown in fig. 7), at this time, the stroke stopper 56 of the driving ring touches the stroke control groove 15 of the valve cover, the driving ring stops rotating, and the valve opening operation is completed.

The utility model adopts the operating device provided with the driving ring and the locking body, the structure of the device is compact, and the valve rod completes the closing and forced sealing of the valve in one-way closing and rotating stroke; and similarly, the valve rod completes the separation forced sealing and opening of the valve in one-way opening rotation stroke. The operation of the valve is smooth and convenient, and the operation mode of the traditional valve is more met. The forced sealing valve has excellent operation performance.

Claims (9)

1. A valve rod operating device of a forced sealing valve comprises a valve body, a valve rod and an upper valve clack driving piece, wherein the valve rod drives the upper valve clack driving piece to rotate in the opening and closing rotation stroke of the valve; the valve rod drives the upper valve flap driving piece to rotate through the driving ring, and the valve rod drives the driving ring to rotate through the locking body.

2. A valve stem operating device for a positive seal valve according to claim 1, wherein the inner bore of the drive ring is rotatably fitted to the valve stem, the outer circumference of the drive ring is rotatably fitted to the valve body, a locking body holding hole is provided on the circumferential wall of the drive ring, the valve stem is provided with a locking body driving groove having an axial position corresponding to the locking body holding hole, and the valve body is provided with a locking groove having an axial position corresponding to the locking body holding hole.

3. The positive seal valve stem operating apparatus as claimed in claim 2, wherein said upper flap actuator is retained in said latch body retaining aperture and said latch body actuating slot during rotational travel of the valve opening and closing; the lock body is held in the lock body holding hole and the lock groove when the valve stem drives the upper valve flap driver to move along the valve stem axis.

4. A positive seal valve stem operating apparatus as claimed in claim 2, wherein the locking body is a cylindrical body having an axis parallel to the valve stem, the locking body driving groove of the valve stem is an arc-shaped groove, and the locking recess of the valve body is an arc-shaped groove.

5. A valve stem operating apparatus for a positive seal valve according to claim 1, wherein said drive ring has an opening dial provided at an upper end thereof, said valve stem has an opening dial, and said opening dial dials said opening dial during driving of said upper valve flap driving member in an opening direction.

6. A valve stem operating device of a forced sealing valve as claimed in claim 1, wherein the lower end of the driving ring is provided with a finger, the upper flap driving member is provided with a connecting groove corresponding to the finger of the driving ring, the finger is inserted into the connecting groove to drive the upper flap driving member to rotate, and the connecting groove slides along the finger.

7. A valve stem operating device of a positive sealing valve according to claim 1, wherein the valve body is provided with a stroke control groove for controlling the rotational stroke of the driving ring, and the driving ring is provided with a stroke stopper corresponding to the stroke control groove.

8. The valve stem operating device of claim 1, wherein the valve stem is provided with a lower flap driving member and a valve core, the valve stem drives the valve core to rotate synchronously, when the valve stem rotates relative to the upper flap driving member, the valve core drives the upper flap driving member and the lower flap driving member to move along the axis of the valve stem, and the upper flap driving member and the lower flap driving member drive the sealing flap to press against the valve seat.

9. A positive seal valve stem operating apparatus as defined in claim 8, wherein the upper flap actuator is provided with an upper drive track for driving the seal flap, the upper drive track being inclined to the axis of rotation of the valve spool, and the lower flap actuator is provided with a lower drive track for driving the seal flap, the lower drive track being inclined to the axis of rotation of the valve spool; the valve core rotates to drive the upper valve clack driving piece and the lower valve clack driving piece to move along the rotation axis of the valve core in opposite directions.

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