CN108758016B

CN108758016B - Ball valve with opening and closing device

Info

Publication number: CN108758016B
Application number: CN201810872078.0A
Authority: CN
Inventors: 邱晓来; 叶建伟; 黄明金; 潘建瓯; 王汉洲
Original assignee: Chaoda Valve Group Co ltd
Current assignee: Chaoda Valve Group Co ltd
Priority date: 2018-08-02
Filing date: 2018-08-02
Publication date: 2023-08-01
Anticipated expiration: 2038-08-02
Also published as: CN108758016A

Abstract

The invention belongs to the field of ball valve devices, and particularly relates to a ball valve with an opening and closing device, which comprises a valve body, a ball body, a valve rod and a driving device, wherein an outlet side valve seat and an inlet side valve seat are arranged in the valve body, the ball body is positioned between the outlet side valve seat and the inlet side valve seat, a baffle is arranged on the outlet side valve seat or near the outlet side valve seat in the valve body, a first through hole is arranged on the baffle, a second through hole is arranged on the valve body corresponding to the ball body, a quick switching device is connected to the valve body, the quick switching device comprises a gland in sealing fit with the second through hole, the gland is detachably connected with the valve body, and a drain valve communicated with an inner cavity of the valve body is arranged on the gland. The device is arranged in the pressure-bearing pipeline, and has compact structure and low manufacturing cost. In addition, the drain valve is opened only to drain the medium in the valve cavity between the inlet valve seat and the outlet valve seat of the ball valve, the space of the valve cavity is small, the medium discharge amount is small, and therefore waste is small.

Description

Ball valve with opening and closing device

Technical Field

The invention belongs to the field of ball valve devices, and particularly relates to a ball valve with an opening and closing device.

Background

The ball valve has the advantages of quick opening and closing, good sealing performance, small fluid resistance and the like, and is widely applied to various fields of petroleum, chemical industry, coal chemical industry, electric power, metallurgy, oil gas transmission and the like as a fluid control device of a pressure-bearing pipeline.

In some cases it is necessary to place external objects into the pressure-bearing pipe or to remove objects from the pressure-bearing pipe. In order to reduce the influence on the continuous operation efficiency of the pressure-bearing pipeline, it is desirable to be able to quickly and conveniently put objects into and take objects out of the pipeline, and considering that the medium in the pressure-bearing pipeline has high pressure and temperature and may be corrosive, toxic, flammable and explosive, the safety of putting objects into and taking objects out of the pressure-bearing pipeline needs to be considered. In order to realize the above functions, a control device as shown in fig. 1 is generally provided, wherein a tee joint 2' is arranged on a pressure-bearing pipeline 1', two through channels are respectively connected with the pressure-bearing pipeline 1' through a valve 3', a blind plate 4' is arranged on the other side channel of the tee joint, the blind plate 4' and a bolt nut 5' and a gasket are adopted to seal the channel, when an object needs to be put into or taken out of the pressure-bearing pipeline, the valves 3' on two sides of the tee joint are firstly closed, then a medium between the two valves is discharged through a relief valve 6', and then the bolts and nuts 5' on the blind plate 4' are disassembled to open the channel. In addition, all the medium between the two valves is discharged before the blind plate is disassembled, the space is large, the medium discharge amount is large, and therefore, waste is also large.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art and provides a ball valve with an opening and closing device.

The technical scheme adopted by the invention is as follows: the utility model provides a ball valve with open and closing device, includes valve body, spheroid, valve rod, drive arrangement, be equipped with export side disk seat, import side disk seat in the valve body, the spheroid is located between export side disk seat and the import side disk seat, on the export side disk seat or on the valve body the interior export side disk seat is provided with the baffle, be equipped with first through-hole on the baffle, correspond on the valve body the spheroid is equipped with the second through-hole, be connected with quick switching device on the valve body, quick switching device include with second through-hole sealing fit's switch gland, the switch gland with the valve body can dismantle the connection, be equipped with the drain valve of intercommunication valve body inner chamber on the switch gland.

The switch gland is fixedly connected with a pressing ring, at least one guide groove is formed in the pressing ring, an adaptive sliding block is installed in the guide groove, the sliding block is located in the guide groove and can only move along the radial direction of the pressing ring and is limited in the circumferential direction, a slot is formed in the valve body corresponding to the sliding block, the sliding block is slidably located in the slot and enables the switch gland to be connected to a first position on the valve body and located outside the slot and enable the switch gland to be separated from the valve body, and an operating device for moving the sliding block is connected to the sliding block.

The pressing ring is internally sleeved with a rotary disc which is rotatable in the circumferential direction and axially limited by the sliding block, the rotary disc is provided with a spiral groove, the sliding block is provided with a guide pin matched with the spiral groove, and the rotary disc is provided with an operating piece for rotating the rotary disc.

The switch is pressed and is covered and hinged with first connecting rod, first connecting rod articulates there is the second connecting rod, the second connecting rod articulates there is the back shaft, back shaft fixed mounting is on the valve body.

The drain valve comprises a drain valve rod and a drain valve spool arranged at the end part of the drain valve rod, a third through hole communicated with the inner cavity of the valve body is formed in the switch pressure cover, the drain valve is opened or closed by means of vertical displacement of the drain valve rod relative to the switch pressure cover, the drain valve rod is connected with a lock pin through a connecting piece, the drain valve rod is in linkage fit with the lock pin, a third through hole for the insertion of the lock pin is formed in the rotary disc, and when the drain valve is in a closed position, the lock pin is located on the inner side of the sliding block.

The drain valve is a needle-type drain valve.

The switch gland is connected with the pressing ring through a screw.

And a sealing ring is arranged between the switch gland and the valve body.

The switch gland and the valve body are taper fit sealing surfaces.

And a pressure gauge is arranged on the valve body.

The beneficial effects of the invention are as follows: the invention provides a ball valve provided with a switching device, which is arranged in a pressure-bearing pipeline, and has the advantages of compact structure and low manufacturing cost. When an object is to be taken out of the pressure-bearing pipeline, the ball valve is closed firstly, then a medium in the valve cavity of the ball valve is discharged through the drain valve, then the switch device can be opened by disassembling the gland, and then the object can be taken out or put into the through hole of the valve body, so that the switch is rapid and convenient. In addition, the drain valve is opened only to drain the medium in the valve cavity between the inlet valve seat and the outlet valve seat of the ball valve, the space of the valve cavity is small, the medium discharge amount is small, and therefore waste is small.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that it is within the scope of the invention to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a prior art structure for picking and placing objects in a pressure-bearing pipeline;

FIG. 2 is a schematic view of a longitudinal cross-section of an embodiment of a ball valve along the direction of fluid flow;

FIG. 3 is a schematic view of a portion of the structure of an embodiment of a ball valve in a transverse cross-section along the direction of fluid flow;

FIG. 4 is a schematic view of the longitudinal cross-section of one embodiment of a ball valve perpendicular to the direction of fluid flow;

FIG. 5 is a schematic view of the structure of the outlet side valve seat;

FIG. 6 is a schematic diagram of a fast switching device;

FIG. 7 is a schematic view of the structure of the pressing ring;

FIG. 8 is a schematic diagram of a slider structure;

FIG. 9 is a cross-sectional view A-A of FIG. 8;

fig. 10 is a schematic diagram of a telescopic movement of a sliding block along a diameter direction driven by rotation of a turntable, wherein a is a schematic diagram of a structure in which the sliding block extends out, and B is a schematic diagram of a structure in which the sliding block retracts;

fig. 11 is a schematic view of a telescopic motion of another moving mode of the sliding block, wherein a is a schematic view of a structure of extending the sliding block, and B is a schematic view of retracting the sliding block;

FIG. 12 is a cross-sectional view of the fast switch device taken in the direction A-A of FIG. 6;

FIG. 13 is a schematic view of the internal structure of a ball valve opening;

FIG. 14 is a schematic view of the internal structure of a ball valve closure;

fig. 15 is a schematic view of the opening process of the through hole on the valve body, (1) is completely closed, (2) the switch gland leaves the valve body, (3) the whole switch device rotates to the side surface of the through hole of the valve body 3;

in the figure, 1, a fast switching device; 1.1, capping; 1.2, a sealing ring; 1.4, sliding blocks; 1.5, a turntable; 1.51, helical grooves; 1.52, a third through hole; 1.6, pressing ring; 1.61, guide slots; 1.7, screws; 1.8, a spanner joint; 1.9, pulling a rod; 1.10, a drain valve; 1.101, drain valve stem; 1.102, drain valve spool; 1.11, connecting pieces; 1.12, locking pin; 1.13, hinging and supporting a screw; 1.14, connecting rod; 1.15, a pin shaft; 1.16, connecting rod; 1.17, a pin shaft; 1.18, a supporting shaft;

2, a sphere; 3, a valve body; 31, a second through hole; 32, a slot; 4, an outlet side valve seat; 41, a baffle; 42, a first through hole; 5, a valve cover; 6, an inlet side valve seat; 7, a bolt and a nut; 8, valve rod; 9, ball valve gland; 10, a driving device; 11, a pressure gauge; 12, object.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.

It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the invention and are not intended to limit the scope of the invention.

As shown in fig. 2, the ball valve with opening and closing means comprises a quick opening and closing means 1, a ball 2, a valve body 3, an outlet side valve seat 4, a valve cover 5, an inlet side valve seat 6, a bolt and nut 7, a valve rod 8, a ball valve gland 9, and a driving means 10. The ball body 2 is fixedly connected with the valve rod 8 and the driving device 10, the driving device 10 drives the valve rod 8 and the ball body 2 to rotate by 90 degrees to open or close the ball valve, and the driving device 10 can be a worm gear transmission device or a spanner, a pneumatic device or an electric device according to requirements. The ball valve of fig. 2 is in an open state, in which fluid from the inlet side line passes through the ball valve to the outlet side line. As shown in fig. 3, a second through hole 31 is formed in the valve body 3 corresponding to the ball body 2, a quick switch device 1 is arranged on the valve body 3, the switch gland 1.1 is detachably connected with the valve body 3, and a drain valve 1.10 communicated with an inner cavity of the valve body 3 is arranged on the switch gland 1.1. As shown in fig. 4, a pressure gauge 11 is mounted on the valve body 1 in order to monitor the pressure in the valve cavity of the ball valve. The outlet side valve seat 4 is provided with a baffle 41, in order to ensure that fluid can smoothly flow through the ball valve, a second through hole 31 is formed in the baffle 41, one side of the baffle, which is close to the ball body, is designed into a spherical surface, and as shown in fig. 5, the baffle 41 can be fixedly arranged on the outlet side valve seat 4 or can be separately arranged with the outlet side valve seat 4, and is fixedly arranged between the outlet side valve seat 4 and the valve body 3.

The implementation of the detachable connection structure between the switch gland 1.1 and the valve body 3 can be shown in fig. 6, a pressing ring 1.6 is fixedly connected to the switch gland 1.1, the structure of the pressing ring 1.6 is shown in fig. 7, at least one guide groove 1.61 is arranged in the pressing ring 1.6, 4 guide grooves are arranged in the figure, and different numbers of guide grooves can be adopted according to different specifications of devices. The guide groove 1.61 is internally provided with an adaptive sliding block 1.4, the structure of the sliding block 1.4 is shown in figures 8 and 9, the sliding block 1.4 can only move along the radial direction of the pressing ring 1.6 in the guide groove 1.61 and is limited in the circumferential direction, the pressing ring 1.6 is sleeved with a rotating disc 1.5 which is rotatable in the circumferential direction and limits the rotating disc 1.5 axially with the sliding block 1.4, the rotating disc 1.5 is provided with a spiral groove 1.51, the sliding block 1.4 is provided with a guide pin 1.41 matched with the spiral groove 1.51, the rotating disc 1.5 is provided with an operating member for rotating the rotating disc 1.5, and the valve body 3 is provided with a slot 32 corresponding to the sliding block 1.4. The turnplate 1.5 is fixedly connected with the spanner bar connector 1.8, the spanner bar connector 1.8 is fixedly connected with the spanner bar 1.9, the turnplate 1.5 can rotate through operating the spanner bar 1.9 and is limited by the spiral groove 1.51 and the guide groove 1.61, when the turnplate 1.5 rotates, the sliding block 1.4 moves in a radial telescopic manner in the guide groove 1.61 of the pressing ring 1.6, as shown in fig. 9, when the turnplate 1.5 moves clockwise (A), the sliding block 1.4 moves radially outwards, a slot 32 is formed in the valve body 3 corresponding to the sliding block 1.4, the sliding block 1.4 enters the slot 32 to be connected with the valve body 3, when the turnplate 1.5 moves anticlockwise (B), the sliding block 1.4 moves radially inwards, and when the sliding block 1.4 leaves the slot 32, the switch gland 1.1 can be detached. The structure realizes the effect of extremely quick opening and closing, and the detachable connection structure that can also take in addition can be through common connected modes such as threaded connection, flange joint, bolted connection, and the like, and in contrast, the detachable connection structure is more quick, can accomplish opening or closing only through rotating at least not more than one round (the carousel in the figure only needs to rotate about 45 degrees), and adopts threaded connection, flange joint, bolted connection to rotate for many weeks just can accomplish the dismantlement at least. In addition, as shown in fig. 11, when one or two sliding blocks 1.4 are adopted, a handle is arranged on the sliding block between the sliding blocks to move the sliding blocks 1.4, when one sliding block 1.4 is adopted, the other end of the sliding block can be hinged, but compared with the way of arranging a turntable, the sliding block with the structure is preferably one or two sliding blocks, the sliding block is too many, the opening is inconvenient, but the sliding block is one or two, so that the acting force for keeping the connection between the switch gland 1.1 and the valve body 3 cannot be uniform, as in fig. 11, the position of the sliding block can ensure the connection between the switch gland 1.1 and the valve body 3, and the position furthest from the sliding block cannot ensure the sealing fit between the sealing ring 1.2 and the valve body 3 in the switch gland 1.1, so that leakage is easy to occur.

The spanner bar joint 1.8 and the spanner bar 1.9 are fixedly connected to form an operating piece for rotating the turntable 1.5, and a handle or a steering wheel can be directly arranged on the turntable 1.5, so that the spanner bar joint and the spanner bar are common operating pieces for rotation.

As shown in fig. 12, the switch gland 1.1 is connected with the connecting rod 1.14 by adopting a hinge 1.13, the connecting rod 1.14 is connected with the connecting rod 1.16 by adopting a pin 1.15, the connecting rod 1.16 is connected with the supporting shaft 1.18 by the pin 1.17, and the supporting shaft 1.18 is fixedly arranged on the valve body 3, so that the switch gland 1.1 and the pressing ring 1.6 cannot perform rotary motion in the through hole of the valve body 3 under the limit of the connecting part. The whole switch device after being taken out can be easily rotated to the side surface of the through hole of the valve body 3 through the hinge support 1.13, the connecting rod 1.14, the pin shaft 1.15, the connecting rod 1.16 and the pin shaft 17, as shown in fig. 12.

Referring to fig. 6, the drain valve 1.10 is disposed in the middle of the switch gland 1.1, the drain valve 1.10 is a needle-shaped stop valve, a valve rod 1.101 of the drain valve and a valve clack are designed into a whole, the drain valve 1.10 is opened or closed by lifting movement of the valve rod 1.101, the valve rod 1.101 of the drain valve is linked with the pin shaft 1.12 through a connecting piece 1.11, and lifting movement of the valve rod 1.101 drives the pin shaft 1.12 to simultaneously lift. The turntable 1.5 is provided with a third through hole 1.52 for inserting the lock pin 1.12, and when the relief valve 1.10 is in the closed position, the lock pin 1.12 extends to the inner side of the sliding block 1.4. When the bleeder valve 1.10 is in the open position, the locking pin 1.12 does not extend to the inside of the sliding block 1.4. Fig. 6 shows the situation when the through hole arranged on the ball valve body is closed, at this time, the sliding block 1.4 is clamped in the groove of the valve body 3, the switch gland 1.1 assembled with the sliding block 1.4 is used for blocking the through hole arranged on the ball valve body, and the through hole of the valve body is ensured to be reliably sealed under the sealing of the sealing ring 1.2. At this time, the drain valve 1.10 is in the closed position, and the lock pin 1.12 is extended to the inside of the slider block 1.4, so that the slider block 1.4 cannot move radially inward. At this time, the second through hole 31 of the valve body 3 cannot be opened. The length of the lock pin 1.12 can also be reduced, the third through hole 1.52 is matched with the lock pin 1.12, or is slightly larger than the lock pin 1.12, when the bleeder valve 1.10 is in the closed position, the lock pin 1.12 stretches to the third through hole 1.52 to finish locking of the turntable, and the second through hole 31 is prevented from being opened. In the prior art, if the medium is forgotten to be discharged before the blind plate is disassembled, the blind plate is disassembled with great potential safety hazard, and the problem can be solved through the arrangement.

A sealing ring 1.2 is arranged between the switch gland 1.1 and the valve body 3. The sealing performance of the switch gland 1.1 and the valve body 3 is improved, and leakage is prevented.

In order to more easily take out the switching device from the through hole of the valve body 3 or put the switching device back into the through hole of the valve body 3, the sealing matching surface of the switching gland 1.1 and the through hole of the valve body 3 is designed into a certain taper, and the sealing ring 1.2 is not easy to damage when the switching device is taken out or put back by adopting the taper matching sealing surface.

The switch gland 1.1 is connected with the pressing ring 1.6 through a screw 1.7, so that the installation is convenient.

As shown in fig. 13, when the ball valve is in an open state, the object 12 to be taken out in the inlet-side pressure pipe is trapped in the ball valve body by the shutter 41 of the ball valve outlet-side valve seat 4 as the fluid flows through the ball valve, and at this time, the ball valve is closed by the rotary driving device 10. As shown in fig. 14, after the ball valve is closed, the object 12 to be removed is directed toward the through hole provided in the body of the ball valve. After the ball valve is closed, the inlet side valve seat 6 and the outlet side valve seat 4 cut off the fluid at the inlet side and the outlet side of the pressure-bearing pipeline respectively. To remove the object 12 trapped within the ball valve body, it is necessary to open a through hole in the ball valve body. In order to open the through hole in the ball valve body, the relief valve 1.10 must be opened first, after the relief valve 1.10 is opened, the medium in the ball valve cavity will be discharged through the relief valve 1.10, thereby ensuring that there is no medium pressure in the ball valve cavity, after the relief valve 1.10 is opened, the lock pin 1.12 is disengaged from the inner side of the slide block 1.4, so that the rotary disc 1.5 can be rotated anticlockwise by operating the spanner bar 1.9, and the slide block 1.4 will be moved radially inwards to be contracted until being disengaged from the slot 32 of the valve body 3. At this time, the entire switching device can be taken out from the second through hole 31 of the valve body 3, and the taken-out entire switching device can be easily rotated to the side of the through hole of the valve body 3 by hinging the 1.13, the connecting rod 1.14, the pin 1.15, the connecting rod 1.16 and the pin 1.17, see fig. 15. At this time, an object in the valve body 3 may be taken out through the second through hole 31 of the valve body 3 or an external object may be put into the valve body 3.

When an object is to be taken out of the pressure-bearing pipeline, the ball valve is closed firstly, then a medium in the valve cavity of the ball valve is discharged through the drain valve, then the switching device can be opened through rotating the rotary table, and then the object can be taken out or put into the through hole of the valve body, so that the switch is rapid and convenient. The device is provided with a mechanism for preventing misoperation, and the switching device on the valve body cannot be opened before the drain valve is not opened, so that the safety of operation is ensured. In addition, the drain valve is opened only to drain the medium in the valve cavity between the inlet valve seat and the outlet valve seat of the ball valve, the space of the valve cavity is small, the medium discharge amount is small, and therefore waste is small.

The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. Ball valve with opening and closing means, including valve body (3), spheroid (2), valve rod (8), drive arrangement (10), be equipped with export side disk seat (4), import side disk seat (6) in valve body (3), spheroid (2) are located between export side disk seat (4) and import side disk seat (6), its characterized in that: the valve is characterized in that a baffle (41) is arranged on the outlet side valve seat (4) or in the valve body (3) and close to the outlet side valve seat (4), a first through hole (42) is formed in the baffle (41), a second through hole (31) is formed in the valve body (3) corresponding to the ball body (2), a quick switching device (1) is connected to the valve body (3), the quick switching device (1) comprises a switching gland (1.1) in sealing fit with the second through hole (31), the switching gland (1.1) is detachably connected with the valve body (3), and a drain valve (1.10) communicated with an inner cavity of the valve body (3) is arranged on the switching gland (1.1);

the switch gland (1.1) is fixedly connected with a pressing ring (1.6), at least one guide groove (1.61) is arranged in the pressing ring (1.6), an adaptive sliding block (1.4) is arranged in the guide groove (1.61), the sliding block (1.4) can only move along the radial direction of the pressing ring (1.6) in the guide groove (1.61) and is limited by the circumference, a slot (32) is arranged on the valve body (3) corresponding to the sliding block (1.4), the sliding block (1.4) can slide relative to the guide groove (1.61) and is provided with a first position positioned in the slot (32) to enable the switch gland (1.1) to be connected to the valve body (3) and a second position positioned outside the slot (32) to enable the switch gland (1.1) to be separated from the valve body (3), and an operation device for moving the sliding block (1.4) is connected to the sliding block (1.4);

the rotary table (1.5) capable of rotating in the circumferential direction is sleeved in the pressing ring (1.6), the pressing ring (1.6) and the sliding block (1.4) form axial limit on the rotary table (1.5), a spiral groove (1.51) is formed in the rotary table (1.5), a guide pin (1.41) matched with the spiral groove (1.51) is arranged on the sliding block (1.4), and an operation piece for rotating the rotary table (1.5) is arranged on the rotary table (1.5);

the drain valve (1.10) comprises a drain valve rod (1.101) and a drain valve spool (1.102) arranged at the end part of the drain valve rod (1.101), a third through hole communicated with the inner cavity of the valve body (3) is formed in the switch gland (1.1), the drain valve (1.10) is opened or closed by means of vertical displacement of the drain valve rod (1.101) relative to the switch gland (1.1), the drain valve rod (1.101) is connected with a lock pin (1.12) through a connecting piece (1.11), the drain valve rod (1.101) is in linkage fit with the lock pin (1.12), a fourth through hole (1.52) for the lock pin (1.12) to be inserted is formed in the rotary disc (1.5), and when the drain valve (1.10) is in a closed position, the lock pin (1.12) is located inside the sliding block (1.4).

2. The ball valve with opening and closing means according to claim 1, wherein: the switch gland (1.1) is hinged with a first connecting rod (1.14), the first connecting rod (1.14) is hinged with a second connecting rod (1.16), the second connecting rod (1.16) is hinged with a supporting shaft (1.18), and the supporting shaft (1.18) is fixedly arranged on the valve body (3).

3. The ball valve with opening and closing means according to claim 1, wherein: the drain valve (1.10) is a needle drain valve.

4. The ball valve with opening and closing means according to claim 1, wherein: the switch gland (1.1) is connected with the gland ring (1.6) through a screw (1.7).

5. The ball valve with opening and closing means according to claim 1, wherein: a sealing ring (1.2) is arranged between the switch gland (1.1) and the valve body (3).

6. Ball valve with opening and closing means according to claim 1 or 5, characterized in that: the switch gland (1.1) and the valve body (3) are taper fit sealing surfaces.

7. The ball valve with opening and closing means according to claim 1, wherein: the valve body (3) is provided with a pressure gauge (11).