CN214838780U

CN214838780U - Pneumatic regulating valve

Info

Publication number: CN214838780U
Application number: CN202121061814.8U
Authority: CN
Inventors: 徐根辉
Original assignee: Beijing Siruiboge Fluid Technology Co ltd
Current assignee: Beijing Siruiboge Fluid Technology Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-11-23
Anticipated expiration: 2031-05-18

Abstract

The utility model relates to a pneumatic control valve belongs to valve technical field. This pneumatic control valve includes: the valve comprises a valve body, wherein a valve seat is arranged in the valve body, the valve seat divides an inner cavity of the valve body into a water inlet cavity and a water outlet cavity, a sleeve is arranged on the valve seat, and a plurality of through-flow windows are arranged on the sleeve; the valve core assembly comprises a valve core and a valve rod assembly, one end of the valve rod assembly is detachably connected with the valve core, the valve core is arranged in the sleeve in a sliding mode, the valve core is matched with the through-flow windows to adjust the medium flow and the medium on-off, and the other end of the valve rod assembly penetrates through the valve body in a sliding mode; the cylinder piston type actuator is connected to the valve body, and the output end of the cylinder piston type actuator is connected with the other end of the valve rod assembly. The pneumatic regulating valve has the advantages of long service life, adaptability to high driving air pressure, convenience in maintenance and low manufacturing cost.

Description

Pneumatic regulating valve

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to pneumatic control valve.

Background

The pneumatic regulating valve is a control valve for regulating parameters such as medium flow, pressure or liquid level, is a key valve device for ensuring the reliability of a fluid process system, and is widely applied to the fields of metallurgy, petrifaction, power plants and the like.

The prior pneumatic regulating valve is generally provided with a film pneumatic actuator to drive a valve to act, but the regulating valve controlled by the film pneumatic actuator has the following problems: (1) short service life, low allowable driving air pressure and the like. (2) High processing and control requirements, high manufacturing cost and high replacement cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technical problem and provide a pneumatic control valve, long service life can adapt to high drive atmospheric pressure, easy maintenance, low in manufacturing cost.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a pneumatic regulator valve comprising:

the valve comprises a valve body, wherein a valve seat is arranged in the valve body, the valve seat divides an inner cavity of the valve body into a water inlet cavity and a water outlet cavity, a sleeve is arranged on the valve seat, and a plurality of through-flow windows are arranged on the sleeve;

the valve core assembly comprises a valve core and a valve rod assembly, one end of the valve rod assembly is detachably connected with the valve core, the valve core is arranged in the sleeve in a sliding mode, the valve core is matched with the through-flow windows to adjust the medium flow and the medium on-off, and the other end of the valve rod assembly penetrates through the valve body in a sliding mode;

the cylinder piston type actuator is connected to the valve body, and the output end of the cylinder piston type actuator is connected with the other end of the valve rod assembly.

The utility model has the advantages that: (1) the pneumatic regulating valve is driven by adopting the cylinder piston type to replace a film type driving mechanism, so that the service life is prolonged, the application range of air pressure is widened, and the actual application range is widened;

(2) the pneumatic regulating valve adopts the matching of the valve core and the sleeve, can conveniently realize the control of the flow of the medium and the on-off of the medium, realizes two functions, and is suitable for the scene needing to regulate the flow of the medium;

(3) the valve core and the valve rod assembly in the pneumatic regulating valve can be separated, so that the valve core and the valve rod assembly are convenient to maintain and replace, and the maintenance cost is reduced.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the valve core is of a hollow cylindrical structure, one end of the valve rod assembly extends into the valve core, a retaining ring and a retaining ring gland are arranged on the valve core and used for pressing one end of the valve rod assembly, a step used for supporting one end of the valve rod assembly is arranged in the valve core, an accommodating groove is formed in the inner side wall of the valve core, the retaining ring is placed in the accommodating groove, and the retaining ring gland is connected with one end of the valve rod assembly.

The beneficial effect of adopting the further scheme is that: the valve core and the valve rod assembly can be conveniently connected and detached, and the valve core and the valve rod assembly can be conveniently maintained.

Further, the valve rod assembly comprises a valve rod and a water passing disc, one end of the valve rod is in threaded connection with the water passing disc, the retaining ring gland is in bolted connection with the water passing disc, and the other end of the valve rod penetrates out of the valve body in a sliding mode.

The beneficial effect of adopting the further scheme is that: the connection of the valve rod and the valve core is facilitated.

Further, be equipped with down the baffle in the water inlet cavity, the baffle is close to down the disk seat and keep away from the water inlet of valve body, be equipped with the overhead gage in the delivery port cavity, the overhead gage is close to the disk seat is kept away from the delivery port of valve body.

The beneficial effect of adopting the further scheme is that: through the structural strength of overhead gage and lower baffle reinforcing valve body, the guide rivers flow direction reduces the risk of forming back the whirl body in sleeve outside annular flow channel, effectively reduces back the whirl body and produces great torque to sleeve and case subassembly, improves the life of valve.

Further, the valve body top is equipped with the accent, be equipped with on the valve body and be used for sealing go up the valve gap subassembly of accent, it is equipped with to compress tightly to go up the accent the telescopic pressure cover, press the cover with telescopic top butt, the valve gap subassembly with the valve body can be dismantled and be connected, the bottom of valve gap subassembly with press the cover butt, the other end of valve rod subassembly slides and passes the valve gap subassembly.

The beneficial effect of adopting the further scheme is that: the maintenance is convenient, and the maintenance cost is reduced.

Further, the valve gap subassembly includes valve gap, seal assembly and gland, the other end of valve rod assembly slides in proper order and passes the valve gap with gland, seal assembly is located valve rod assembly with gap department between the valve gap, gland with the connection can be dismantled to the valve gap, gland's lower extreme with the seal assembly butt, through gland will the seal assembly extrusion inflation.

The beneficial effect of adopting the further scheme is that: the sealing performance is improved.

Further, the cylinder piston type actuator comprises a support, a piston type cylinder and a position indicator, the bottom end of the support is connected with the valve body, the piston type cylinder is connected to the top end of the support, the position indicator is connected with the output end of the piston type cylinder, and the other end of the valve rod assembly is connected with the position indicator.

The beneficial effect of adopting the further scheme is that: the piston type cylinder is convenient to fix.

Furthermore, the piston type air cylinder comprises a cylinder barrel, a cylinder head, a cylinder tail, a piston rod and an elastic piece, wherein two ends of the cylinder barrel are respectively connected with the cylinder head and the cylinder tail, the piston is arranged in the cylinder barrel in a sliding mode, one end of the elastic piece is connected with the cylinder head or the cylinder tail, the other end of the elastic piece is connected with the piston, the piston is pushed to move to the cylinder head or the cylinder tail through the elastic piece, the cylinder head is connected with one end of the support, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the cylinder head in a sliding mode and extends into the support to be connected with the other end of the valve rod assembly.

The beneficial effect of adopting the further scheme is that: the convenient removal that drives the case can keep the position of case simultaneously, in addition through the elastic component that sets up for only need the independent control piston to the compression of elastic component can, reduced the drive to the piston, it is more convenient to control, the cost is lower.

Further, a cylinder head air port communicated with the cylinder barrel is arranged on the cylinder head, and a cylinder tail air port communicated with the cylinder barrel is arranged on the cylinder tail.

The beneficial effect of adopting the further scheme is that: the cylinder barrel is convenient to inflate and exhaust.

Furthermore, a guide sleeve is arranged at the joint of the piston rod and the cylinder head.

Drawings

FIG. 1 is a schematic structural view of the pneumatic control valve of the present invention;

fig. 2 is a schematic structural diagram of another distribution of the cylinder piston type actuators of the present invention;

fig. 3 is a schematic structural diagram of the installation position of the manual mechanism of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a valve body; 11. a water inlet cavity; 12. a lower baffle plate; 13. a water outlet cavity; 14. an upper baffle plate; 2. a valve seat; 21. a valve seat cone valve port; 3. a sleeve; 31. a through-flow window; 4. a valve core assembly; 41. a valve core; 411. a valve core cone valve port; 42. a valve stem assembly; 421. a water passing plate; 421-1, a water through hole; 422. a valve stem; 43. a baffle ring; 44. a baffle ring gland bush; 5. pressing the sleeve; 51. a seal ring; 6. a valve cover assembly; 61. a valve cover; 611. a seal assembly; 62. a spacer ring; 63. a round nut; 64. a sealing gland; 65. a gland nut; 7. a cylinder piston type actuator; 71. a support; 72. a position indicator; 73. a travel indicator; 74. a piston cylinder; 741. a piston rod; 742. a guide sleeve; 742-1, a guide ring; 742-2, dustproof ring; 743. a cylinder head; 743-1, cylinder head port; 744. a cylinder barrel; 745. a spring; 746. a piston; 746-1, piston seal ring; 746-2, guide ring; 747. locking the nut; 748. a cylinder tail; 748-1, cylinder tail gas port; 749. supporting a sleeve; 8. and a manual mechanism.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1 to 3, the present embodiment provides a pneumatic regulator valve including: the valve comprises a valve body 1, a valve core assembly 4 and a cylinder piston type actuator 7.

Be equipped with disk seat 2 in the valve body 1, disk seat 2 separates the inner chamber of valve body 1 for water inlet cavity 11 and delivery port cavity 13, is equipped with sleeve 3 on the disk seat 2, is equipped with a plurality of through-flow windows 31 on the sleeve 3. The valve core assembly 4 comprises a valve core 41 and a valve rod assembly 42, one end of the valve rod assembly 42 is detachably connected with the valve core 41, the valve core 41 is arranged in the sleeve 3 in a sliding mode, the flow rate of a medium and the on-off of the medium are adjusted through the cooperation of the valve core 41 and the through-flow windows 31, and the other end of the valve rod assembly 42 penetrates through the valve body 1 in a sliding mode. The cylinder piston type actuator 7 is connected to the valve body 1, and the output end of the cylinder piston type actuator 7 is connected with the other end of the valve rod assembly 42.

Wherein, be equipped with the valve pocket in the valve body 1, can be used for the fluid to flow through, the both ends of valve body 1 are equipped with water inlet and delivery port. The water inlet cavity 11 is used for fluid to enter, the water inlet cavity 11 is communicated with a water inlet, the water outlet cavity 13 is used for fluid to flow out, and the water outlet cavity 13 is communicated with a water outlet. The main body of the valve body 1 is a sphere structure.

Wherein, the valve seat 2 is provided with a through port for communicating the water inlet cavity 11 and the water outlet cavity 13, the valve core 41 is used for matching with the sleeve 3, and when the valve core 41 seals the through-flow window 31 on the sleeve 3, the pneumatic regulating valve is closed at the moment. When the valve core 41 does not close the through-flow window 31 on the sleeve 3, the water inlet cavity 11 is communicated with the water outlet cavity 13, and at the moment, the pneumatic regulating valve is opened. By controlling the degree to which the valve element 41 closes the flow window 31, the medium flow rate is regulated and can be controlled.

Wherein, case 41 can dismantle with valve rod assembly 42 and be connected, can conveniently dismantle the maintenance with case 41 and valve rod assembly 42, has reduced cost of maintenance.

Wherein, sleeve 3 is the tubular structure, and a plurality of through-flow windows 31 are located sleeve 3's lateral wall, and the axis ring evenly distributed around sleeve 3 communicates the inside and outside cavity of sleeve 3, and the shape of through-flow window 31 can design into the structure of different shapes according to valve flow characteristic needs. The bottom of the sleeve 3 is provided with a step hole which is sleeved and pressed at the upper end of the valve seat 2, and the valve seat 2 is fixed in the inner cavity of the valve body 1.

The cylinder piston type actuator 7 is used for driving the valve rod assembly 42 to move up and down, so that the valve core 41 is driven to move in the sleeve 3, the through-flow window 31 on the sleeve 3 is closed or opened, the valve body 1 is switched on and off, and meanwhile the flow of a medium can be adjusted. The cylinder piston type actuator 7 is different from a film actuating mechanism, the service life of the cylinder piston type actuator 7 is long, and the bearing air pressure strength is high.

The effect of the technical scheme of this embodiment is that this pneumatic control valve adopts cylinder piston to drive, has replaced film formula actuating mechanism, has improved life, has improved atmospheric pressure application scope simultaneously, has improved practical application scope. The pneumatic control valve adopts the matching of the valve core 41 and the sleeve 3, can conveniently realize the control of the flow of the medium and the on-off of the medium, realizes two functions, and is suitable for the scene of regulating the medium flow. The valve core 41 and the valve rod assembly 42 in the pneumatic regulating valve can be separated, so that the pneumatic regulating valve is convenient to maintain and replace, and the maintenance cost is reduced.

Preferably, in this embodiment, the valve core 41 is a hollow cylindrical structure, one end of the valve rod assembly 42 extends into the valve core 41, the valve core 41 is provided with a retaining ring 43 and a retaining ring gland 44 for pressing one end of the valve rod assembly 42, a step for supporting one end of the valve rod assembly 42 is arranged in the valve core 41, the inner side wall of the valve core 41 is provided with an accommodating groove, the retaining ring 43 is placed in the accommodating groove, and the retaining ring gland 44 is connected with one end of the valve rod assembly 42.

Wherein, case 41 is the hollow tubular structure, and the hole upper end of case 41 is big-end-up's step hole structure, and wherein, the holding tank is located the big pore side wall above, and radial indent for imbed the installation and keep off ring 43, and wherein, the one end of valve rod subassembly 42 stretches into in the macropore, and the butt is on the step, and the one end butt of keeping off ring 43 and valve rod subassembly 42 through the embedding holding tank realizes that the card hinders fixedly, prevents to take place relative displacement between valve rod subassembly 42 and the case 41, so form and connect reliable and stable case subassembly 4.

Wherein, the lower end of the outer cylindrical surface of the valve core 41 is provided with a valve core conical valve port 411, the upper end of the inner hole of the valve seat 2 is provided with a valve seat conical valve port 21, and the valve core conical valve port 411 and the valve seat conical valve port 21 form a valve port sealing pair. When the valve core 41 moves downwards to the valve core conical valve port 411 and the valve seat conical valve port 21 to be tightly attached, the sealing function is achieved, and the valve is reliably closed. When the valve core 41 moves upwards, the valve core conical valve port 411 and the valve seat conical valve port 21 are separated to form a valve port flow channel, so that water in the water inlet cavity 11 can enter the water outlet cavity 13 through the valve port flow channel, and the valve is in an open state.

The baffle ring 43 is formed by cutting a metal ring into three independent sections, and the diameter of the baffle ring 43 is smaller than that of the hole in which the baffle ring is arranged, so that the baffle ring is arranged in the accommodating groove. The retainer gland 44 is a disc structure with a step on the periphery and a through hole in the center, the diameter of the lower end of the step is slightly smaller than the inner diameter of the retainer 43, the diameter of the upper end of the step is slightly smaller than the diameter of the inner hole in the upper end of the valve core 41, the retainer gland is sleeved on the valve rod assembly 42 and is nested into the inner annular wall of the retainer 43 to be abutted, and the cut retainer 43 can be prevented from being separated from the accommodating groove.

Preferably, in the present embodiment, the valve stem assembly 42 includes a valve stem 422 and a water passing disk 421, one end of the valve stem 422 is screwed with the water passing disk 421, the retainer gland 44 is bolted with the water passing disk 421, and the other end of the valve stem 422 slides out of the valve body 1.

Wherein, one end of the valve rod 422 is screwed with the axis of the water disk 421, and welded firmly to form a component structure.

Wherein, the water passing disc 421 is provided with a screw hole, the baffle ring gland 44 is provided with a screw hole corresponding to the screw hole on the water passing disc 421, and the baffle ring gland 44 and the water passing disc 421 are fastened and connected through the screw.

The water through disc 421 is provided with a water through hole 421-1, the retainer ring gland 44 is provided with a central through hole, and the water through hole 421-1 is directly communicated with the central through hole of the retainer ring gland 44, so that the upper end cavity and the lower end cavity of the valve core 41 are always in a communicated state, a large part of hydraulic acting force on the valve core 41 can be balanced, and the specification of the cylinder piston type actuator 7 is further effectively reduced.

Preferably, in this embodiment, a lower baffle 12 is arranged in the water inlet cavity 11, the lower baffle 12 is close to the valve seat 2 and is far away from the water inlet of the valve body 1, an upper baffle 14 is arranged in the water outlet cavity 13, and the upper baffle 14 is close to the valve seat 2 and is far away from the water outlet of the valve body 1.

Through the structural strength of overhead gage 14 and lower baffle 12 reinforcing valve body 1, the guide rivers flow direction, reduces and forms the risk of returning the whirl body in sleeve 3 outside annular flow channel, effectively reduces to return the whirl body and produce great torque to sleeve 3 and case subassembly 4, improves the life of valve.

Preferably, in this embodiment, the top end of the valve body 1 is provided with an upper cavity opening, the valve body 1 is provided with a valve cover assembly 6 for closing the upper cavity opening, the upper cavity opening is provided with a pressing sleeve 5 for pressing the sleeve 3, the pressing sleeve 5 abuts against the top end of the sleeve 3, the valve cover assembly 6 is detachably connected with the valve body 1, the bottom end of the valve cover assembly 6 abuts against the pressing sleeve 5, and the other end of the valve rod assembly 42 slidably penetrates through the valve cover assembly 6.

The valve core 41 and the valve rod assembly 42 in the valve body 1 are repaired and replaced through the arranged upper cavity opening. The valve cover assembly 6 is detachably connected with the valve body 1 through bolts. Wherein a cylinder piston actuator 7 is mounted on the valve cover assembly 6.

Wherein, the upper end of the sleeve 3 is provided with a boss which is nested at the lower end of the pressing sleeve 5 and is fixed inside the valve body 1 by press fitting.

Wherein, the pressure sleeve 5 is a tubular structure with a radial boss at the upper end, and graphite gaskets are arranged at the joints of the upper end surface and the lower end surface of the boss, the valve cover assembly 6 and the valve body 1 respectively, so that the medium in the inner cavity of the valve body 1 is ensured not to leak. The lower end of the pressing sleeve 5 is a stepped hole with a small upper part and a large lower part, the stepped hole is sleeved on a boss at the upper end of the sleeve 3 and forms a rectangular sealing groove, and the sealing groove belongs to an open groove structure and can be conveniently provided with an axial sealing ring 51; the sealing ring 51 is a combined sealing ring 51 with an annular structure, and the inner surface of the combined sealing ring 51 is provided with a sealing lip which is in sealing fit with the smooth outer cylindrical surface of the valve core 41 to form a sealing pair.

Preferably, in the present embodiment, the bonnet assembly 6 includes a bonnet 61, a sealing assembly 611 and a sealing gland 64, the other end of the valve stem assembly 42 sequentially slides through the bonnet 61 and the sealing gland 64, the sealing assembly 611 is located at a gap between the valve stem assembly 42 and the bonnet 61, the sealing gland 64 is detachably connected to the bonnet 61, the lower end of the sealing gland 64 abuts against the sealing assembly 611, and the sealing assembly 611 is pressed and expanded through the sealing gland 64.

The valve cover 61 is of a disc structure with a cylindrical boss at the upper end, the outer cylindrical surface of the cylindrical boss is of a three-level stepped structure with a small upper part and a large lower part, the cylindrical surface of the middle-level step is divided into two parts, the lower part is a polished surface and is matched with the cylinder piston type actuator 7, and the upper part is an external thread end and is in threaded connection with the cylinder piston type actuator 7.

The other end of the valve rod 422 passes through the axis of the valve cover 61, which is beneficial to the assembly of the valve cover 61 and the valve body 1.

Wherein, the lower extreme of valve gap 61 is equipped with the round platform, and the upper chamber mouth tolerance fit of round platform side face of cylinder and valve body 1 upper end guarantees the installation axiality requirement. The large annular area outside the circular table of the valve cover 61 is provided with a circle of uniformly distributed mounting holes, the upper end surface of the valve body 1 is provided with screw holes, and the mounting holes correspond to the screw holes on the upper end surface of the valve body 1, so that the valve body 1 and the valve cover 61 can be fastened and connected through a stud to form a closed pressure-bearing body.

Wherein, be equipped with gland nut 65 on the gland 64, gland nut 65 and the top threaded connection of valve gap 61, through rotatory gland nut 65 with gland 64 extrusion seal assembly 611 downwards. The gland nut 65 can adjust the sealing compression amount of the sealing component 611, and after the seal is worn, the seal can be further screwed and extruded to realize the sealing compensation capability.

In addition, it should be noted that, the sealing assembly 611 can be provided with a plurality of groups, which can effectively improve the sealing performance, prolong the service life of the seal, and reduce the risk of leakage.

Wherein, can set up spacer ring 62 between the multiunit seal assembly 611, can separate seal assembly 611 through spacer ring 62, realize many times sealed effect. Wherein, be equipped with sealed culvert body hole on the inside wall that valve gap 61 and valve rod 422 are connected, the spacer ring 62 is placed at sealed culvert body downtheholely, can fix spacer ring 62.

Preferably, in the present embodiment, the cylinder piston actuator 7 includes a bracket 71, a piston cylinder 74 and a position indicator 72, wherein the bottom end of the bracket 71 is connected with the valve cover 61, the piston cylinder 74 is connected with the top end of the bracket 71, the position indicator 72 is connected with the output end of the piston cylinder 74, and the other end of the valve rod assembly 42 is connected with the position indicator 72.

Wherein the bracket 71 is used to support a fixed piston cylinder 74. The bracket 71 is a steel casting in a shape like a Chinese character 'kou', the upper end of the bracket is in a flange structure, and the bracket is provided with a mounting hole connected with the bottom of the piston type cylinder 74 and fixedly connected with the bottom of the piston type cylinder through a screw. The lower end of the bracket 71 is of a circular ring structure with a hole at the center, is sleeved on the valve cover 61, and is in threaded connection with the upper end of the valve cover 61 through a circular nut 63, so that the bracket 71 and the valve cover 61 are connected together. The upright columns on the two sides of the bracket 71 are of non-uniform cross-section structures, and the inner sides of the upright columns are provided with rib plates for mounting travel indication plates 73, electromagnetic valves and other electrical control elements.

Preferably, in this embodiment, the piston cylinder 74 includes a cylinder tube 744, a cylinder head 743, a cylinder tail 748, a piston 746, a piston rod 741 and an elastic member, two ends of the cylinder tube 744 are respectively connected to the cylinder head 743 and the cylinder tail 748, the piston 746 is slidably disposed in the cylinder tube 744, one end of the elastic member is connected to the cylinder head 743 or the cylinder tail 748, the other end of the elastic member is connected to the piston 746, the piston 746 is pushed by the elastic member to move to the cylinder head 743 or the cylinder tail 748, the cylinder head 743 is connected to one end of the bracket 71, one end of the piston rod 741 is connected to the piston 746, and the other end of the piston rod 741 slidably penetrates through the cylinder head 743 and slidably extends into the bracket 71 to be connected to the other end of the valve rod assembly.

Wherein, the cylinder head 743 and the cylinder tail 748 are respectively connected with two ends of the cylinder tube 744 in a sealing way. The cylinder 744 is divided into an upper space and a lower space by the piston 746, and the piston 746 reciprocates up and down in the cylinder 744 to drive the piston rod 741 to reciprocate up and down. Wherein, one end of the piston rod 741 is provided with a support sleeve 749, the support sleeve 749 is connected with the piston 746 through a locking nut 747, and a washer is arranged below the piston 746.

The piston 746 is of a disc-shaped structure, a piston sealing ring 746-1 and a guide ring 746-2 are installed on the lateral surface of the outer circle, and the piston 746 is in sealing fit with the inner wall of the cylinder 744 through the piston sealing ring 746-1 and the guide ring 746-2, so that the piston 746 can fully seal the upper space and the lower space of the cylinder 744.

The elastic element is a spring 745, the control air quantity is adjusted through an external control air circuit to overcome the acting force of the spring 745 on the piston 746, and the piston 746 is in a certain dynamic balance state, so that the adjustment of the opening position of the valve by the piston type pneumatic actuator 7 can be realized, and finally the purpose of controlling the medium parameter of the pipeline is achieved.

There are two cases of the position of the spring 745.

When the spring 745 is arranged between the piston 746 and the cylinder head 743, the cylinder head air port 743-1 is communicated with the outside atmosphere, the cylinder tail air port 748-1 is communicated with an external control air path, compressed air is introduced, control air pressure acts on the piston 746 to push the piston 746 to compress the spring 745 to move downwards, and the piston rod 741 extends out of the cylinder.

When the spring 745 is arranged between the piston 746 and the cylinder tail 748, the cylinder tail air port 748-1 is communicated with the outside atmosphere, the cylinder head air port 743-1 is communicated with an external control air path, compressed air is introduced, the control air pressure acts on the piston 746 to push the piston 746 to compress the spring 745 to move upwards, and the piston rod 741 retracts into the cylinder.

Preferably, in this embodiment, a head port 743-1 communicating with the cylinder tube 744 is provided at the head 743, and a tail port 748-1 communicating with the cylinder tube 744 is provided at the tail 748.

Preferably, in this embodiment, a guide sleeve 742 is disposed at a connection between the piston rod 741 and the cylinder head 743.

The cylinder tail 748 and the cylinder head 743 are both disc-shaped structures, one end close to the cylinder barrel 744 is in a circular truncated cone shape, a sealing groove is arranged in the center of the outer side of the circular truncated cone shape, and an O-shaped ring is sleeved in the sealing groove and is in sealing contact with the inner wall of the cylinder barrel 744. A through hole with steps is formed in the center of the cylinder head 743 and used for installing the guide sleeve 742, and the through hole is matched with the guide sleeve in a sealing mode through an O ring; the guide sleeve 742 fits over the piston rod 741 and is in sealing engagement therewith. The cylinder tail 748 and the cylinder head 743 are provided with a circle of evenly distributed screw mounting holes close to the outer edges, and the cylinder tail 748 and the cylinder head 743 are fastened and connected together through a stud, so that a complete component assembly is formed.

The guide sleeve 742 comprises a guide ring 742-1 and a dust ring 742-2, and the guide ring 742-1 and the dust ring 742-2 are sleeved on the piston rod 741. The sliding guide support is improved by the guide ring 742-1, and dust is prevented from entering the cylinder 744 by the dust ring 742-2.

Preferably, in this embodiment, the manual mechanism 8 can also be flexibly configured according to functional requirements, and the manual mechanism 8 includes a hand wheel, a worm gear box, a transmission threaded sleeve, a bearing and the like. The manual mechanism 8 shown in fig. 3 is disposed between the ram cylinder 74 and the bracket 71, and may be disposed at the top end of the ram cylinder 74 as needed.

The principle of the embodiment is that when the pneumatic regulating valve is used, a cylinder tail gas port 748-1 or a cylinder head gas port 743-1 of the piston type cylinder 74 is communicated with an external gas circuit, elements such as a valve positioner, a signal amplifier, a pressure reducing valve, a filter and the like are arranged on the external gas circuit, a signal is fed back to the regulator according to the change of the detected pipeline medium parameter, the regulator outputs a corresponding control signal to the valve positioner through signal conversion, the gas quantity led into the piston type cylinder 74 is regulated, the balance state of the pushing force of the air pressure acting on the piston 746 and the acting force of the spring 745 is regulated, the piston 746 is driven to move upwards or downwards in the cylinder barrel 744, the valve core assembly 4 is driven to move upwards and downwards, the size of the valve core 41 for sealing the through-flow window 31 is regulated, and finally the pipeline medium parameter flowing through the valve body 1 is controlled to reach a set value and tend to a stable state, the final control effect is achieved. This pneumatic control valve adopts cylinder piston executor 7, and for the film executor, piston 746 seals and has higher life than the diaphragm, and can bear higher control atmospheric pressure, and the executor with the specification has wider drive power output scope, is suitable for more valve specifications, has higher adaptability when the valve jamming phenomenon appears.

In the description of the present invention, it is to be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic regulator valve, comprising:

the water-saving valve comprises a valve body (1), wherein a valve seat (2) is arranged in the valve body (1), the valve seat (2) divides an inner cavity of the valve body (1) into a water inlet cavity (11) and a water outlet cavity (13), a sleeve (3) is arranged on the valve seat (2), and a plurality of through-flow windows (31) are arranged on the sleeve (3);

the valve core assembly (4) comprises a valve core (41) and a valve rod assembly (42), one end of the valve rod assembly (42) is detachably connected with the valve core (41), the valve core (41) is arranged in the sleeve (3) in a sliding mode, medium flow and medium on-off are adjusted through the cooperation of the valve core (41) and the through-flow windows (31), and the other end of the valve rod assembly (42) penetrates through the valve body (1) in a sliding mode;

the valve body (1) is connected with the valve rod assembly (42), the valve rod assembly is connected with the valve body (7), and the valve rod assembly is connected with the valve rod assembly (42) through the valve rod assembly (7).

2. The pneumatic regulating valve according to claim 1, wherein the valve core (41) is a hollow cylindrical structure, one end of the valve rod assembly (42) extends into the valve core (41), a stop ring (43) and a stop ring gland (44) for pressing one end of the valve rod assembly (42) are arranged on the valve core (41), a step for supporting one end of the valve rod assembly (42) is arranged in the valve core (41), an accommodating groove is arranged on the inner side wall of the valve core (41), the stop ring (43) is placed in the accommodating groove, and the stop ring gland (44) is connected with one end of the valve rod assembly (42).

3. The pneumatic regulating valve according to claim 2, wherein the valve rod assembly (42) comprises a valve rod (422) and a water through disc (421), one end of the valve rod (422) is in threaded connection with the water through disc (421), the retainer gland (44) is in bolted connection with the water through disc (421), and the other end of the valve rod (422) slides out of the valve body (1).

4. Pneumatic regulating valve according to claim 1, characterized in that a lower baffle (12) is arranged in the water inlet chamber (11), the lower baffle (12) being close to the valve seat (2) and remote from the water inlet of the valve body (1), and an upper baffle (14) is arranged in the water outlet chamber (13), the upper baffle (14) being close to the valve seat (2) and remote from the water outlet of the valve body (1).

5. The pneumatic regulating valve according to claim 1, wherein an upper cavity opening is formed in the top end of the valve body (1), a valve cover assembly (6) used for closing the upper cavity opening is arranged on the valve body (1), a pressing sleeve (5) used for pressing the sleeve (3) is arranged on the upper cavity opening, the pressing sleeve (5) is abutted to the top end of the sleeve (3), the valve cover assembly (6) is detachably connected with the valve body (1), the bottom end of the valve cover assembly (6) is abutted to the pressing sleeve (5), and the other end of the valve rod assembly (42) penetrates through the valve cover assembly (6) in a sliding mode.

6. A pneumatic regulating valve according to claim 5, characterized in that the valve cover assembly (6) comprises a valve cover (61), a sealing assembly (611) and a sealing gland (64), the other end of the valve rod assembly (42) slides through the valve cover (61) and the sealing gland (64) in turn, the sealing assembly (611) is located at a gap between the valve rod assembly (42) and the valve cover (61), the sealing gland (64) is detachably connected with the valve cover (61), the lower end of the sealing gland (64) abuts against the sealing assembly (611), and the sealing assembly (611) is extruded and expanded through the sealing gland (64).

7. A pneumatic regulating valve according to any one of claims 1-6, characterized in that the cylinder piston actuator (7) comprises a bracket (71), a piston cylinder (74) and a position indicator (72), the bottom end of the bracket (71) being connected to the valve body (1), the piston cylinder (74) being connected to the top end of the bracket (71), the position indicator (72) being connected to the output end of the piston cylinder (74), the other end of the valve stem assembly (42) being connected to the position indicator (72).

8. The pneumatic regulator valve according to claim 7, wherein the piston cylinder (74) comprises a cylinder tube (744), a cylinder head (743), a cylinder tail (748), a piston (746), a piston rod (741) and an elastic member, both ends of the cylinder tube (744) are respectively connected with the cylinder head (743) and the cylinder tail (748), the piston (746) is slidably disposed in the cylinder tube (744), one end of the elastic member is connected with the cylinder head (743) or the cylinder tail (748), the other end is connected with the piston (746), the piston (746) is pushed to move to the cylinder head (743) or the cylinder tail (746) by the elastic member, the cylinder head (743) is connected with one end of the bracket (71), one end of the piston rod (741) is connected with the piston (746), and the other end of the piston rod (741) is slidably passed through the cylinder head (748), and is slidably inserted into the bracket (71) to be connected with the other end of the valve rod assembly (42).

9. The pneumatic regulator valve according to claim 8, wherein a head port (743-1) communicating with said cylinder tube (744) is provided in said head (743), and a tail port (748-1) communicating with said cylinder tube (744) is provided in said tail (748).

10. A pneumatic regulator valve according to claim 9, characterised in that the connection of the piston rod (741) to the cylinder head (743) is provided with a guide sleeve (742).