CN218644929U - Balanced cage formula list seat governing valve - Google Patents

Abstract

The utility model provides a balanced cage type single-seat regulating valve belongs to governing valve equipment field. Including the valve body, the valve gap, a valve seat, the valve cage, the passageway has in the valve body, valve gap connection is at the valve body top, the passageway inner wall is equipped with the step, the disk seat is placed on the step, the valve cage is placed on the disk seat, the valve cage has the slide opening, swing joint has the case in the valve cage, the case top is equipped with the screw sleeve, and there is the valve rod through screw sleeve swing joint, the valve gap is passed to the valve rod upper end, the valve cage includes the cage body down, the lower cage body includes a plurality of annular circle, the fixed cage body that forms down of a plurality of annular circle mutually, the lower cage body up end is fixed mutually with the last cage body down terminal surface, many have in the annular circle and be the step runner that the annular distributes and can intercommunication passageway and slide opening. The utility model discloses a constantly change flow direction and runner area to the medium, progressively reduce pressure avoids taking place the jam, inside the effective protection valve body, improves governing valve life, rational in infrastructure.

Description

Balanced cage type single-seat regulating valve

Technical Field

The utility model belongs to governing valve equipment field relates to a balanced cage single seat governing valve.

Background

The balance valve is a valve which plays a role in dynamic and static balance adjustment under the hydraulic working condition, and is a valve with a special function. In some industries, since media (flowable materials of various types) have large pressure or flow differences in various parts of a pipe or a container, in order to reduce or balance the difference, a balance valve is installed between the corresponding pipes or containers to adjust the relative balance of pressures on both sides, or to achieve flow balance by means of flow division. A common single-seat regulating valve is a balanced cage type single-seat regulating valve, also called a cage type regulating valve or a squirrel cage type regulating valve.

The existing balance cage type single-seat regulating valve comprises a valve body, a valve cover connected with the upper end of the valve body, a travel indicator connected with the upper end of the valve cover, and a pneumatic actuator at the upper end of the travel indicator. The valve body is internally provided with a balance cage which is communicated with a liquid pipeline, the balance cage is internally provided with a valve core connected with the lower valve rod, and the valve core can be opened by moving up and down relative to the valve seat. The lower valve rod penetrates through the valve rod and is inserted into the stroke indicator, the upper end of the valve rod is connected with the upper valve rod through a hayf ring, and the upper valve rod is inserted into the pneumatic actuator and is connected with the pneumatic piston. The working principle is that compressed gas is introduced into the upper end and the lower end of the pneumatic actuator in a staggered mode so as to push the pneumatic piston to move, and the pneumatic piston drives the valve core to move up and down sequentially through the upper valve rod and the lower valve rod so as to open or close the valve.

The design of current balanced cage list seat governing valve exists following not enough: when the valve core moves up and down relative to the valve seat to open the valve, the flow direction of a medium with an over-high flow speed cannot be changed by the adjusting valve in the prior art, once the medium flows to a large impact force, the inside of the valve is easily damaged, and the valve is easily blocked by the medium with an over-high flow speed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a balanced cage formula single seat governing valve to solve the problem of mentioning in the above-mentioned background art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a balanced cage formula single seat governing valve, includes valve body, valve gap, disk seat, valve cage, the internal passageway that is the S type that has of valve, the valve gap passes through bolted connection at the valve body top, its characterized in that, the passageway inner wall is equipped with the step, the disk seat is placed on the step, the valve cage is placed on the disk seat, the valve cage has the slide opening, swing joint has the case in the valve cage, the case top is equipped with the screw sleeve, and has the valve rod through screw sleeve swing joint, the valve gap is passed to the valve rod upper end, the valve cage includes the cage body, the lower cage body, the disk seat has the opening that is linked together with the lower cage body, passageway, the lower cage body includes a plurality of annular circle, and a plurality of annular circle is fixed mutually to form the lower cage body, and the through-hole of a plurality of annular circle is linked together, the lower cage body up end is fixed mutually with the last cage body down terminal surface, many have in the annular circle be the annular distribution and can communicate the step runner of passageway and slide opening.

Furthermore, the valve core comprises an upper valve core and a lower valve core, the upper valve core is slidably connected in the upper cage body and can be sealed and blocked by the upper cage body, the lower valve core is slidably connected in the lower cage body and can be sealed and blocked by the lower cage body, and the diameter of the section of the lower valve core is smaller than that of the section of the upper valve core.

Further, the annular ring include buffering circle one, buffering circle two, two retainer plates, buffering circle one, buffering circle two and two the outer wall of retainer plate all opens the semicircular location breach that is the same quantity and the same radius, buffering circle two is fixed at buffering circle one top, two the retainer plate is fixed mutually with the outside of buffering circle and the outside of buffering circle respectively, the location breach of buffering circle one, buffering circle two, two retainer plates is linked together, buffering circle one is gone up and has a plurality of buffering groups that are the annular and distribute, buffering circle two is gone up and has a plurality of connection groups that are the annular and distribute, buffering group cooperatees with the connection group and is connected and form the step runner.

Further, the buffering group include buffer hole one, buffer hole two, T type hole, two buffer hole three, buffer hole one, buffer hole two, T type hole, two buffer hole three distribute along a buffer ring one inner circle to outer lane in proper order, two one ends in buffer hole are relative with the left side in T type hole, two buffer hole three is relative with the right side both ends in T type hole respectively, buffer hole one is linked together with the through-hole, two buffer hole three is linked together with the external world of lower cage body.

Furthermore, the connection group comprises a first connection hole, a second connection hole and a third connection hole, the first connection hole, the second connection hole and the third connection hole are sequentially distributed from the inner ring to the outer ring of the second buffer ring, two ends of the first connection hole are respectively communicated with the first buffer hole and the second buffer hole, two ends of the second connection hole are respectively communicated with the second buffer hole and the left end of the T-shaped hole, and a connecting section of the third connection hole is respectively communicated with the third buffer hole and the right end of the T-shaped hole.

Furthermore, a first sealing washer is fixed to the top of the valve cage, the bottom of the valve cover abuts against the first sealing washer, the valve cover presses the valve cage on the valve seat through the first sealing washer, the valve cover presses the valve seat on the step through the valve cage, and a second sealing washer is fixed between the valve seat and the step.

Furthermore, an annular blocking edge which can be abutted against the bottom of the upper valve core is arranged in the upper cage body.

Further, the bottom of the valve cover is provided with a protruding annular convex block, the top of the valve body is provided with a positioning groove for clamping and embedding the convex block, a sealing groove is formed in the outer side of the convex block, and a third sealing washer is fixed in the sealing groove.

Furthermore, the lower cage body at least comprises 7 annular rings, and the lower cage body at most comprises 15 annular rings.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a set up the valve cage, the valve cage includes the cage body, the lower cage body, and the lower cage body comprises the annular ring that a plurality of has the step runner, realizes constantly changing flow direction and runner area to the medium, and progressively reducing pressure effectively avoids taking place the jam, effectively protects inside the valve body, improves governing valve life, rational in infrastructure.

2. The utility model discloses a set up seal ring one, seal ring three, effectively prevent that the medium from revealing between valve body, the valve gap, it is that seal ring two effectively prevents the medium from revealing between disk seat and the valve body through this.

Drawings

Fig. 1 is a schematic structural diagram of the balance cage type single-seat regulating valve of the present invention.

Fig. 2 is a partial sectional view of the lower cage body of the balance cage type single-seat regulating valve of the present invention.

Fig. 3 is a schematic structural diagram of a first buffer ring of the balance cage type single-seat regulating valve of the present invention.

Fig. 4 is a schematic structural diagram of a second buffer ring of the balance cage type single-seat regulating valve of the present invention.

Fig. 5 is a schematic structural diagram of the fixing ring of the balance cage type single-seat regulating valve of the present invention.

In the figure, 1, a valve body; 2. a valve cover; 3. a valve seat; 4. a cage; 5. a channel; 6. a valve core; 7. a valve stem; 8. an upper cage body; 9. a lower cage body; 10. an annular ring; 11. an upper valve core; 12. a lower valve core; 13. a first buffer ring; 14. a second buffer ring; 15. a stationary ring; 16. positioning the notch; 17. a first buffer hole; 18. a second buffer hole; 19. a T-shaped hole; 20. a third buffer hole; 21. a first connecting hole; 22. connecting holes II; 23. connecting a hole III; 24. sealing washer one; 25. a second sealing washer; 26. blocking edges; 27. a bump; 28. and a third sealing washer.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the balance cage type single-seat regulating valve comprises a valve body 1, a bonnet 2, a valve seat 3 and a valve cage 4, wherein an S-shaped channel 5 is arranged in the valve body 1, the bonnet 2 is connected to the top of the valve body 1 through a bolt, a step is arranged on the inner wall of the channel 5, the valve seat 3 is placed on the step, the valve cage 4 is placed on the valve seat 3, the valve cage 4 is provided with a sliding hole, a valve core 6 is movably connected in the valve cage 4, the valve core 6 can move up and down along the sliding hole, a threaded sleeve is arranged at the top end of the valve core 6, a valve rod 7 is movably connected through the threaded sleeve, the upper end of the valve rod 7 penetrates through the bonnet 2, the valve rod 7 penetrates through an inner hole of the bonnet 2 to be sealed with the inner hole of the bonnet 2, the top of the bonnet 2 can be externally connected with a fixed pneumatic actuator, the pneumatic actuator is an actuating device for driving the opening and closing or regulating the valve by using air pressure, and is called a pneumatic actuating mechanism or a pneumatic device, but is called a pneumatic head generally called pneumatic head. Pneumatic actuators are sometimes also equipped with certain auxiliary devices. Commonly used valve positioners and hand wheel mechanisms. The valve positioner is used for improving the performance of the actuator by utilizing a feedback principle, so that the actuator can realize accurate positioning according to a control signal of the controller. The hand wheel mechanism is used to control the control valve directly to maintain the normal production when the control system has no power supply, no gas supply, no output of the controller or failure of the executing mechanism. The top of the valve rod 7 penetrates through the valve cover 2 to be connected with a pneumatic actuator, the valve cage 4 comprises an upper cage body 8 and a lower cage body 9, the valve seat 3 is provided with a through hole communicated with the lower cage body 9 and the channel 5, the lower cage body 9 comprises a plurality of annular rings 10, the annular rings 10 are fixed to form the lower cage body 9, and the through holes of the annular rings 10 are communicated with each other, the upper end face of the lower cage body 9 is fixed to the lower end face of the upper cage body 8, a plurality of step flow passages which are distributed in an annular shape and can be communicated with the channel 5 and a sliding hole are arranged in the annular rings 10, the pneumatic actuator drives the valve rod 7 to move upwards, when the valve rod 7 drives the valve core 6 to move upwards, the valve hole exposure area is larger, namely, the valve of the regulating valve is opened, conversely, the pneumatic actuator drives the valve rod 7 to move downwards, and when the valve rod 7 drives the valve core 6 to move downwards, the valve hole exposure area is smaller, namely, the valve of the regulating valve is closed.

As shown in fig. 1, the valve core 6 includes an upper valve core 11 and a lower valve core 12, the upper valve core 11 is slidably connected in the upper cage 8 and can block the upper cage 8, the lower valve core 12 is slidably connected in the lower cage 9 and can block the lower cage 9, the diameter of the cross section of the lower valve core 12 is smaller than that of the cross section of the upper valve core 11, and an annular blocking edge 26 capable of abutting against the bottom of the upper valve core 11 is arranged in the upper cage 8.

As shown in fig. 1 to 5, the annular ring 10 includes a first buffer ring 13, a second buffer ring 14, and two fixing rings 15, where the outer walls of the first buffer ring 13, the second buffer ring 14, and the two fixing rings 15 are all provided with semicircular positioning notches 16 with the same number and the same radius, the second buffer ring 14 is fixed at the top of the first buffer ring 13, the two fixing rings 15 are respectively fixed with the outer side of the second buffer ring 14 and the outer side of the first buffer ring 13, the second buffer ring 14, and the positioning notches 16 of the two fixing rings 15 are communicated, the first buffer ring 13 is provided with a plurality of buffer groups distributed in an annular shape, the second buffer ring 14 is provided with a plurality of connecting groups distributed in an annular shape, and the buffer groups are connected with the connecting groups in a matching manner to form a stepped flow channel.

As shown in fig. 3, the buffer group includes a first buffer hole 17, a second buffer hole 18, a T-shaped hole 19, and two third buffer holes 20, the first buffer hole 17, the second buffer hole 18, the T-shaped hole 19, and the two third buffer holes 20 are sequentially distributed along the inner ring to the outer ring of the first buffer ring 13, one end of the second buffer hole 18 is opposite to the left side of the T-shaped hole 19, the two third buffer holes 20 are respectively opposite to the two ends of the right side of the T-shaped hole 19, the first buffer hole 17 is communicated with the through hole, and the two third buffer holes 20 are communicated with the outside of the lower cage 9.

As shown in fig. 1 and 4, the connection group includes a first connection hole 21, a second connection hole 22, and two third connection holes 23, the first connection hole, the second connection hole 22, and the two third connection holes 23 are sequentially distributed from the inner ring to the outer ring of the second buffer ring 14, two ends of the first connection hole 21 are respectively communicated with the first buffer hole 17 and the second buffer hole 18, two ends of the second connection hole 22 are respectively communicated with the left ends of the second buffer hole 18 and the T-shaped hole 19, and a connection section of the third connection hole 23 is respectively communicated with the third buffer hole 20 and the right end of the T-shaped hole 19, so that when a medium enters the valve cage 4 from the outside, the medium sequentially passes through the third buffer hole 20, the third connection hole 23, the T-shaped hole 19, the second connection hole 22, the second buffer hole 18, the first connection hole 21, and the first buffer hole 17 and enters the valve cage 4, and when the medium flows from the inside of the valve cage 4 to the passage 5, the medium sequentially passes through the first buffer hole 17, the first connection hole 21, the second connection hole 18, the second connection hole 22, the T-shaped hole 19, the third connection hole 23, and the buffer hole 20 and the buffer hole 5, so that the area of the valve body is gradually changed, the flow area is gradually reduced, the service life of the valve body is effectively prolonged, and the valve body is effectively protected.

As shown in fig. 1, the top of the valve cage 4 is fixed with a first sealing washer 24, the bottom of the valve bonnet 2 abuts against the first sealing washer 24, the valve bonnet 2 compresses the valve cage 4 on the valve seat 3 through the first sealing washer 24, the valve bonnet 2 compresses the valve seat 3 on the step through the valve cage 4, a second sealing washer 25 is fixed between the valve seat 3 and the step, the bottom of the valve bonnet 2 is provided with a protruding annular projection 27, the top of the valve body 1 is provided with a positioning groove for clamping and embedding the projection 27, the outer side of the projection 27 is provided with a sealing groove, a third sealing washer 28 is fixed in the sealing groove, and the lower cage body 9 is composed of 7 annular rings 10.

The utility model discloses a practical method as follows:

the regulating valve is installed at a position needing to be regulated of a pipeline, a pneumatic actuator is externally connected to the top of the valve cover 2, the top of the valve rod 7 is connected with the pneumatic actuator and the regulation is completed, the pneumatic actuator is driven to drive the valve rod 7 to move upwards, when the valve rod 7 drives the valve core 6 to move upwards, the larger the exposed area of the valve hole is, namely, the valve of the regulating valve is opened, when a medium enters the valve cage 4 from the outside, the medium sequentially passes through the three buffer holes 20, the three connecting holes 23, the T-shaped hole 19, the two connecting holes 22, the two buffer holes 18, the first connecting hole 21 and the first buffer hole 17 and enters the valve cage 4, when the medium flows to the channel 5 from the valve cage 4, the medium sequentially passes through the first buffer hole 17, the first connecting hole 21, the second buffer hole 18, the second connecting hole 22, the T-shaped hole 19, the three connecting holes 23 and the three buffer holes 20 to enter the channel 5, so that the medium changes the flow direction and the flow channel area, the pressure is gradually reduced, the blockage is effectively avoided, the inside of the valve body 1 is effectively protected, the service life of the regulating valve is prolonged, the smaller the valve hole is driven by the pneumatic actuator, when the valve rod 7 drives the valve core 6 to move downwards, and the valve is closed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (9)

1. A balance cage type single-seat regulating valve comprises a valve body (1), a valve cover (2), a valve seat (3) and a valve cage (4), the valve body (1) is internally provided with an S-shaped channel (5), the valve cover (2) is connected to the top of the valve body (1) through a bolt, it is characterized in that the inner wall of the channel (5) is provided with a step, the valve seat (3) is arranged on the step, the valve cage (4) is placed on the valve seat (3), the valve cage (4) is provided with a sliding hole, a valve core (6) is movably connected in the valve cage (4), a threaded sleeve is arranged at the top end of the valve core (6), and is movably connected with a valve rod (7) through a threaded sleeve, the upper end of the valve rod (7) passes through the valve cover (2), the valve cage (4) comprises an upper cage body (8) and a lower cage body (9), the valve seat (3) is provided with a through hole communicated with the lower cage body (9) and the channel (5), the lower cage body (9) comprises a plurality of annular rings (10), the annular rings (10) are fixed to form the lower cage body (9), the through holes of the annular rings (10) are communicated, the upper end surface of the lower cage body (9) is fixed with the lower end surface of the upper cage body (8), the annular ring (10) is internally provided with a plurality of step flow channels which are distributed annularly and can be communicated with the channel (5) and the slide hole.

2. The balance cage type single-seat regulating valve according to claim 1, wherein the valve core (6) comprises an upper valve core (11) and a lower valve core (12), the upper valve core (11) is slidably connected in the upper cage body (8) and can block the upper cage body (8), the lower valve core (12) is slidably connected in the lower cage body (9) and can block the lower cage body (9), and the cross-sectional diameter of the lower valve core (12) is smaller than that of the upper valve core (11).

3. The balance cage type single-seat adjusting valve according to claim 2, wherein the annular ring (10) comprises a first buffer ring (13), a second buffer ring (14) and two fixing rings (15), the outer walls of the first buffer ring (13), the second buffer ring (14) and the two fixing rings (15) are all provided with semicircular positioning notches (16) with the same number and the same radius, the second buffer ring (14) is fixed at the top of the first buffer ring (13), the two fixing rings (15) are respectively fixed with the outer sides of the second buffer ring (14) and the outer side of the first buffer ring (13), the positioning notches (16) of the first buffer ring (13), the second buffer ring (14) and the two fixing rings (15) are communicated, the first buffer ring (13) is provided with a plurality of buffer groups distributed in an annular shape, the second buffer ring (14) is provided with a plurality of connecting groups distributed in an annular shape, and the buffer groups are connected with the connecting groups in a matching manner to form a stepped flow channel.

4. The balance cage type single-seat adjusting valve as claimed in claim 3, wherein the buffering group comprises a first buffering hole (17), a second buffering hole (18), a T-shaped hole (19) and two third buffering holes (20), the first buffering hole (17), the second buffering hole (18), the T-shaped hole (19) and the two third buffering holes (20) are sequentially distributed from the inner ring to the outer ring of the first buffering ring (13), one end of the second buffering hole (18) is opposite to the left side of the T-shaped hole (19), the two third buffering holes (20) are respectively opposite to the two right ends of the T-shaped hole (19), the first buffering hole (17) is communicated with the through hole, and the two third buffering holes (20) are communicated with the outside of the lower cage body (9).

5. The balance cage type single-seat adjusting valve according to claim 4, wherein the connecting set comprises a first connecting hole (21), a second connecting hole (22) and a third connecting hole (23), the first connecting hole and the second connecting hole (22) are sequentially distributed from the inner ring to the outer ring of the second buffer ring (14), two ends of the first connecting hole (21) are respectively communicated with the first buffer hole (17) and the second buffer hole (18), two ends of the second connecting hole (22) are respectively communicated with the second buffer hole (18) and the left end of the T-shaped hole (19), and connecting sections of the third connecting hole (23) are respectively communicated with the third buffer hole (20) and the right end of the T-shaped hole (19).

6. A balance cage type single-seat regulating valve according to claim 1, characterized in that a first sealing washer (24) is fixed on the top of the valve cage (4), the bottom of the valve cover (2) abuts against the first sealing washer (24), the valve cover (2) presses the valve cage (4) on the valve seat (3) through the first sealing washer (24), the valve cover (2) presses the valve seat (3) on the step through the valve cage (4), and a second sealing washer (25) is fixed between the valve seat (3) and the step.

7. A balanced cage single-seat regulating valve according to claim 2, characterized in that said upper cage (8) has an annular rim (26) inside which it can abut against the bottom of the upper valve core (11).

8. A balance cage type single-seat regulating valve according to claim 5, characterized in that the bottom of the valve cover (2) is provided with a protruding annular bump (27), the top of the valve body (1) is provided with a positioning groove for the bump (27) to be clamped, the outer side of the bump (27) is provided with a sealing groove, and a sealing washer three (28) is fixed in the sealing groove.

9. A balance cage single seat regulating valve according to claim 5, characterized in that said lower cage (9) is composed of at least 7 annular rings (10), said lower cage (9) being composed of up to 15 annular rings (10).

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