CN216279451U

CN216279451U - Pneumatic regulating valve

Info

Publication number: CN216279451U
Application number: CN202123133238.6U
Authority: CN
Inventors: 王青青; 王世恩; 魏超; 林倩; 秦晓龙
Original assignee: Kaifeng High And Middle Pressure Valve Co ltd
Current assignee: Kaifeng High And Middle Pressure Valve Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-12
Anticipated expiration: 2031-12-14

Abstract

The utility model relates to a pneumatic regulating valve which comprises a valve body, wherein a valve seat is arranged in the valve body, a valve clack is arranged on the valve seat, a throttling cage sleeve is arranged on the valve seat outside the valve clack, a throttling hole is formed in the throttling cage sleeve, a first valve cover is arranged in the valve body above the throttling cage sleeve, a valve rod is arranged on the valve clack and the first valve cover, a first graphite sealing ring is sleeved on the first valve cover inside the valve body, a first packing gland is sleeved on the first valve cover above the first graphite sealing ring, a second valve cover is sleeved on the first valve cover above the first packing gland, and the second valve cover is in threaded connection with the valve body. The valve cover has the advantages that the stress area of the valve cover on the valve body is increased, so that the technical problem that a medium leaks from a position between the valve body and the valve cover due to the fact that the valve cover deflects on the valve body is solved, the valve cover is convenient to adjust and use, and the valve cover has a wide market prospect.

Description

Pneumatic regulating valve

Technical Field

The utility model relates to the field of regulating valves, in particular to a pneumatic regulating valve.

Background

The regulating valve acts as a variable resistance in the conduit. It changes the turbulence of the process fluid or provides a pressure drop in laminar flow conditions, which is caused by changing the valve resistance or "friction". This pressure reduction process is commonly referred to as "throttling".

The valve body and the valve cover of the existing regulating valve are usually fixed by a plurality of bolts, especially, the number of bolts used for presetting the valve body and the valve cover is relatively small for ensuring the integral structural strength of the small regulating valve, when the regulating valve is applied to a high-pressure medium, the high-pressure medium enters an inner cavity of the valve body from an inlet end of the valve body and then repeatedly impacts the valve cover, the impact force provided by the high-pressure medium is uneven in the repeated impact process, the valve cover deflects on the valve body, the deflection angle is not large, but the sealing filler used for sealing the position between the valve body and the valve cover is forced to deform, the deformed sealing filler is locally easy to thin and cannot meet the sealing requirement, and the medium is leaked from the position between the valve body and the valve cover to cause product damage.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a pneumatic regulating valve which can increase the force bearing area of a valve cover on a valve body so as to reduce the leakage of a medium from between the valve body and the valve cover caused by the deflection of the valve cover on the valve body, and aims to overcome the defects in the prior art.

The technical scheme adopted by the utility model is as follows: the utility model provides a pneumatic control valve, includes the valve body, is provided with the disk seat in the valve body, is provided with the valve clack on the disk seat, is provided with the throttle cage cover on the disk seat in the valve clack outside, the throttle cage cover seted up the orifice, be provided with first valve gap in the valve body of throttle cage cover top, be provided with the valve rod on valve clack and the first valve gap, the cover is equipped with first graphite sealing ring on the inboard first valve gap of valve body, the cover is equipped with first gland on the first valve gap of first graphite sealing ring top, the cover is equipped with the second valve gap on the first valve gap of first gland top, second valve gap and valve body threaded connection.

Preferably, the valve clack seted up the valve rod mounting groove, the bottom of valve rod adopts cylindric structure, the bottom of valve rod is installed in the valve rod mounting groove, has seted up first ball mounting groove on the valve clack in the valve rod outside, has seted up the second ball mounting groove on the inboard valve rod of first ball mounting groove, be provided with the ball in first ball mounting groove and the second ball mounting groove, the cross-section of valve rod bottom adopts the arc structure.

Preferably, the valve body and the second valve cover are provided with positioning pins, and the positioning pins are in threaded connection with the valve body.

Preferably, the throttling cage above the throttling holes is provided with a plurality of backflow holes, and the plurality of throttling holes are uniformly distributed on the outer side of the central axis of the throttling cage in a star shape.

Preferably, the first valve cover is provided with a packing installation groove, the packing installation groove is sequentially provided with a second packing gland and a third graphite sealing ring from top to bottom, the second packing gland and the third graphite sealing ring are sleeved on the valve rod, and the second packing gland is in threaded connection with the packing installation groove.

Preferably, the second valve cover above the valve seat is provided with a cylinder mounting rack, the cylinder mounting rack is provided with a driving cylinder, the driving cylinder is in transmission connection with a valve rod, the valve rod is provided with a position indicating disc, the cylinder mounting rack outside the position indicating disc is provided with a scale, and the scale is provided with a scale layer.

Preferably, the valve clack outside the first ball mounting groove is provided with a ball mounting hole, a sealing bolt is arranged in the ball mounting hole, and the sealing bolt is in threaded connection with the ball mounting hole.

The utility model has the beneficial effects that: firstly, the side surface of the second valve cover is provided with the external thread, the inner cavity of the valve body is provided with the internal thread, and the stress area between the second valve cover and the valve body is increased, so that the technical phenomenon that the second valve cover and the valve body deflect due to uneven stress is reduced, and the technical problem that a medium leaks from the space between the valve body and the valve cover is reduced.

And a position indicating disc is arranged on the valve rod, a scale is arranged on the cylinder mounting frame outside the position indicating disc, and a scale layer is arranged on the scale, so that the opening amplitude of the valve clack can be fed back conveniently.

Finally, the top of the inner cavity of the valve seat adopts a circular truncated cone-shaped structure, and the partial structure of the bottom of the valve clack is matched with the circular truncated cone-shaped inner cavity of the top of the valve seat, so that the sealing surfaces of the valve seat and the valve clack are increased, and the sealing effect is improved.

The utility model has the advantages of simple structure, convenient operation, ingenious design, great improvement on the working efficiency, good social and economic benefits and easy popularization and use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of detail a of fig. 1.

Fig. 3 is a partially enlarged schematic view of detail B of fig. 1.

Detailed Description

As shown in fig. 1 to 3, a pneumatic control valve comprises a valve body 1, a valve seat 2 is arranged in the valve body 1, a valve flap 3 is arranged on the valve seat 2, a throttling cage 4 is arranged on the valve seat 2 outside the valve flap 3, the top of the inner cavity of the valve seat 2 adopts a circular truncated cone-shaped structure, and the partial structure of the bottom of the valve flap 3 is matched with the circular truncated cone-shaped inner cavity of the top of the valve seat 2; throttle cage 4 seted up orifice 5, throttle cage 4 above orifice 5 on be provided with backward flow hole 16, the quantity of orifice 5 adopts a plurality of, a plurality of orifice 5 is the outside of star even distribution at 4 axis of throttle cage. A first valve cover 6 is arranged in the valve body 1 above the throttling cage sleeve 4, a valve rod 7 is arranged on the valve clack 3 and the first valve cover 6, a first graphite sealing ring 8 is sleeved on the first valve cover 6 at the inner side of the valve body 1, the first graphite sealing ring 8 adopts an integrally formed tubular structure consisting of a round pipe part and a round table part, the round table part is positioned below the round pipe part, the inner diameter of the round table part is gradually reduced along with the increase of the height of the round table part, a sealing ring mounting part matched with the first graphite sealing ring 8 is arranged on the first valve cover 6, the first graphite sealing ring 8 is mounted on the sealing ring mounting part of the first valve cover 6, the side wall of the sealing ring mounting part of the first valve cover 6 is attached to the inner cavity of the valve body 1, a first packing gland 9 is sleeved on the first valve cover 6 above the first graphite sealing ring 8, a second valve cover 10 is sleeved on the first valve cover 6 above the first packing gland 9, the second valve cover 10 is positioned above the sealing ring mounting part of the first valve cover 6, the side surface of the second valve cover 10 is provided with external threads, the inner cavity of the valve body 1 is provided with internal threads, and the second valve cover 10 is in threaded connection with the valve body 1.

Valve clack 3 seted up valve rod mounting groove 11, the bottom of valve rod 7 adopts cylindric structure, the bottom of valve rod 7 is installed in valve rod mounting groove 11, has seted up first ball mounting groove 12 on the valve clack 3 in the valve rod 7 outside, has seted up second ball mounting groove 13 on the valve rod 7 of first ball mounting groove 12 inboard, be provided with ball 14 in first ball mounting groove 12 and the second ball mounting groove 13, the cross-section of valve rod 7 bottom adopts the arc structure. The first ball bearing mounting groove 12 and the second ball bearing mounting groove 13 both adopt annular groove-shaped structures, the cross section of the first ball bearing mounting groove 12 and the cross section of the second ball bearing mounting groove 13 both adopt circular arc shapes, the radius of the cross section of the first ball bearing mounting groove 12 is not less than that of the cross section of the second ball bearing mounting groove 13, the valve clack 3 in the first ball mounting groove 12 outside on seted up ball mounting hole 26, sealed fixture block 28 and sealing bolt 27 have set gradually along being close to first ball mounting groove 12 to keeping away from the direction of first ball mounting groove 12 in the ball mounting hole 26, spacing draw-in groove 29 has been seted up in the ball mounting hole 26 outside, spacing draw-in groove 29 and sealed fixture block 28 fixed connection, spacing draw-in groove 29 movable mounting is in ball mounting hole 26, sealing bolt 27 and the threaded connection of ball mounting hole 26, the cambered surface structure is adopted to the one side of the first ball mounting groove 12 of orientation of sealed fixture block 28. When the valve is opened, after the valve rod 7 drives the valve clack 3 to separate from the valve seat 2, a high-pressure medium impacts the valve clack 3 from the inlet end of the valve body 1 through the throttling hole 5, the impact force is uneven, and the valve clack 3 can rotate to consume a part of energy under the limit of the first ball mounting groove 12, the second ball mounting groove 13 and the ball 14 so as to avoid damage caused by local excessive erosion of the valve clack 3; meanwhile, the radius of the section of the first ball mounting groove 12 is not smaller than that of the section of the second ball mounting groove 13, and the section of the bottom end of the valve rod 7 is of an arc structure; when the valve is closed, the structure characteristics of slight deflection of the limit positions of the first ball mounting groove 12, the second ball mounting groove 13 and the ball 14 are combined and utilized the self weight of the valve clack 3 and the guide of the valve clack 3, so that the valve clack 3 is conveniently closed on the valve seat 2 in an aligned position.

And the valve body 1 and the second valve cover 10 are provided with positioning pins 15, and the positioning pins 15 are in threaded connection with the valve body 1. The valve body 1 and the second valve cover 10 are provided with mounting holes for mounting the positioning pin 15, the positioning pin 15 is in threaded connection with part of the mounting holes on the valve body 1, part of the mounting holes on the second valve cover 10 are of a blind hole structure, the inner side end of the positioning pin 15 is mounted in part of the mounting holes on the second valve cover 10 to play a limiting role, after the product is used for a period of time, if the first graphite sealing ring 8 leaks, the positioning pin 15 can be dismounted, the second valve cover 10 is screwed downwards, and the second valve cover 10 drives the first packing gland 9 to move downwards to enable the first graphite sealing ring 8 to deform again; then, the corresponding position on the screwed second valve cover 10 is provided with the blind hole structure again, and finally the positioning pin 15 is mounted to play a limiting role again.

And a second graphite sealing ring 17 is arranged between the valve seat 2 and the valve body 1. The first valve cover 6 is provided with a packing mounting groove 18, the packing mounting groove 18 is sequentially provided with a second packing gland 19 and a third graphite sealing ring 20 from top to bottom, the second packing gland 19 and the third graphite sealing ring 20 are sleeved on the valve rod 7, and the second packing gland 19 is in threaded connection with the packing mounting groove 18.

Second valve gap 10 above disk seat 2 on be provided with cylinder mounting bracket 21, be provided with on the cylinder mounting bracket 21 and drive actuating cylinder 22, drive actuating cylinder 22 and preferably adopt servo cylinder, drive actuating cylinder 22 and valve rod 7 transmission and connect, be provided with position indication dish 23 on the valve rod 7, position indication dish 23 adopts annular structure, be provided with scale 24 on the cylinder mounting bracket 21 in the position indication dish 23 outside, be provided with scale layer 25 on the scale 24.

The use method of the product is as follows: as shown in fig. 1 to 3, after the product is installed at a preset installation position, a preset opening range is set according to actual field process requirements, after the preset opening range is determined, the driving cylinder 22 is opened to drive the valve rod 7 to move towards the cylinder body direction of the driving cylinder 22, the valve rod 7 drives the valve flap 3 and the position indication plate 23 to move correspondingly, and when the value of the position indication plate 23 moving on the scale layer 25 reaches the preset opening range, the extension rod of the driving cylinder 22 stops driving the valve rod 7, so that the operation is completed.

Through this embodiment, utilize to set up the external screw thread in the side of second valve gap 10, set up the internal thread on the inner chamber of valve body 1, increased the lifting surface area between second valve gap 10 and the valve body 1 to the technical phenomenon that the deflection takes place for second valve gap 10 and valve body 1 because the atress is inhomogeneous has been reduced.

The pneumatic regulating valve meets the requirements of workers in the field of regulating valves, and has wide market prospect.

Claims

1. The utility model provides a pneumatic control valve, includes valve body (1), is provided with disk seat (2) in valve body (1), is provided with valve clack (3) on disk seat (2), is provided with throttle cage cover (4), its characterized in that on disk seat (2) in the valve clack (3) outside: throttle cage cover (4) seted up orifice (5), be provided with first valve gap (6) in valve body (1) of throttle cage cover (4) top, be provided with valve rod (7) on valve clack (3) and first valve gap (6), the cover is equipped with first graphite sealing ring (8) on valve body (1) inboard first valve gap (6), the cover is equipped with first gland (9) on first valve gap (6) of first graphite sealing ring (8) top, the cover is equipped with second valve gap (10) on first valve gap (6) of first gland (9) top, second valve gap (10) and valve body (1) threaded connection.

2. The pneumatic regulator valve according to claim 1, wherein: valve clack (3) seted up valve rod mounting groove (11), the bottom of valve rod (7) adopts cylindric structure, install in valve rod mounting groove (11) the bottom of valve rod (7), seted up first ball mounting groove (12) on valve clack (3) in the valve rod (7) outside, second ball mounting groove (13) have been seted up on valve rod (7) of first ball mounting groove (12) inboard, be provided with ball (14) in first ball mounting groove (12) and second ball mounting groove (13), the cross-section of valve rod (7) bottom adopts the arc structure.

3. The pneumatic regulator valve according to claim 1, wherein: the valve body (1) and the second valve cover (10) are provided with positioning pins (15), and the positioning pins (15) are in threaded connection with the valve body (1).

4. The pneumatic regulator valve according to claim 1, wherein: the throttling cage sleeve (4) above the throttling holes (5) is provided with backflow holes (16), the number of the throttling holes (5) is a plurality, and the throttling holes (5) are distributed on the outer side of the central axis of the throttling cage sleeve (4) in a star shape.

5. The pneumatic regulator valve according to claim 1, wherein: the valve rod is characterized in that a packing mounting groove (18) is formed in the first valve cover (6), a second packing gland (19) and a third graphite sealing ring (20) are sequentially arranged in the packing mounting groove (18) from top to bottom, the second packing gland (19) and the third graphite sealing ring (20) are sleeved on the valve rod (7), and the second packing gland (19) is in threaded connection with the packing mounting groove (18).

6. The pneumatic regulator valve according to claim 1, wherein: the valve seat is characterized in that a cylinder mounting frame (21) is arranged on a second valve cover (10) above the valve seat (2), a driving cylinder (22) is arranged on the cylinder mounting frame (21), the driving cylinder (22) is in transmission connection with a valve rod (7), a position indicating disc (23) is arranged on the valve rod (7), a scale (24) is arranged on the cylinder mounting frame (21) on the outer side of the position indicating disc (23), and a scale layer (25) is arranged on the scale (24).

7. The pneumatic regulator valve according to claim 2, wherein: the valve clack (3) outside the first ball mounting groove (12) is provided with a ball mounting hole (26), a sealing bolt (27) is arranged in the ball mounting hole (26), and the sealing bolt (27) is in threaded connection with the ball mounting hole (26).