CN117889225B - Pneumatic valve capable of adjusting compression stroke of spring - Google Patents
Pneumatic valve capable of adjusting compression stroke of spring Download PDFInfo
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- CN117889225B CN117889225B CN202410278467.6A CN202410278467A CN117889225B CN 117889225 B CN117889225 B CN 117889225B CN 202410278467 A CN202410278467 A CN 202410278467A CN 117889225 B CN117889225 B CN 117889225B
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- 239000012530 fluid Substances 0.000 claims description 10
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/06—Adjustable connecting-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/12—Attachments or mountings
- F16F1/121—Attachments or mountings adjustable, e.g. to modify spring characteristics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
- F16H21/20—Crank gearings; Eccentric gearings with adjustment of throw
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
- F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
- F16K31/1635—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston for rotating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/56—Mechanical actuating means without stable intermediate position, e.g. with snap action
- F16K31/563—Mechanical actuating means without stable intermediate position, e.g. with snap action for rotating or pivoting valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a pneumatic valve capable of adjusting the compression stroke of a spring, and relates to the technical field of pneumatic execution valves, which comprises a pneumatic execution assembly and a valve pipe, wherein the pneumatic execution assembly is fixedly connected with the outer wall of the valve pipe; the pneumatic execution assembly is provided with a first piston cylinder and a second piston cylinder which are coaxial and opposite, a first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, and a connecting cylinder is arranged between the first piston and the second piston; according to the invention, through the design of adjustable spring and the design of adjustable swing arm rotation radius, the invention can adapt to spring force change, and has emergency opening and closing capability.
Description
Technical Field
The invention relates to the technical field of pneumatic execution valves, in particular to a pneumatic valve with an adjustable spring compression stroke.
Background
The pneumatic execution valve of the Honiweil series is a key component in the field of industrial automation and is specially designed for realizing automatic control of the valve; the valve is used for converting pneumatic energy into mechanical motion by taking compressed air as a power source so as to control the opening and closing and the adjustment of the valve; the pneumatic actuator of the Honeviral generally comprises at least one mechanical assembly of a gas chamber, a piston, a spring, etc., and corresponding sensors and control interfaces; when the control system sends out a signal, the pneumatic actuator receives the signal and adjusts the pressure in the air chamber, so that the piston drives the valve rod to rotate, and the valve is pushed to reach a preset opening or closing position.
The design of the actuator considers various working environments, so that the actuator has good corrosion resistance and protection performance, and can reliably work in severe environments; the actuator of the holmivir generally has a high-strength housing and a precise internal construction, ensuring long-term stable operation and low maintenance requirements.
Advantages of pneumatic actuation valves are their rapid response and simpler mechanical structure compared to electric actuators, as well as their safety advantages in potentially explosive environments; in terms of maintenance, the pneumatic execution valve is generally designed to facilitate on-site maintenance, and replacement and maintenance of parts can be completed quickly, so that downtime is reduced; in addition, the detailed technical documentation and specialized customer support provided by holmivir allows the user to better understand product characteristics, ensuring performance and longevity of the actuator.
Pneumatic actuation valves of the holmivir class technically meet the stringent requirements of the modern industry for automation and control systems, especially in those situations where fast operation and special safety standards are required, by providing accurate, reliable and efficient fluid control solutions.
However, the conventional pneumatic actuator valve of the holmivir class still has the following problems:
(1) The pneumatic execution valve is internally provided with springs, a gas conveying system of a control port can input preset gas pressure under specific requirements, the springs can be in a condition of being soft and reduced in elasticity under long-term use and use environments under severe working conditions, after the elasticity of the springs is reduced, fixed gas pressure is input or reduced, the springs can be in a condition of increasing compression stroke or insufficient extension stroke, and the butterfly plates of the valve can be in a condition of being not tightly closed or insufficient opening clearance;
(2) The series of pneumatic execution valves can execute movement by inputting or outputting gas through the control port, in the process, besides the pneumatic execution valves can possibly fail, a system for controlling the air pressure can also possibly fail, and when the air pressure control system fails, the pneumatic execution valves cannot execute work.
Disclosure of Invention
The invention aims to provide a pneumatic valve capable of adjusting the compression stroke of a spring so as to solve the problems.
The invention is realized by the following technical scheme:
The pneumatic valve comprises a pneumatic execution assembly and a valve pipe, wherein the pneumatic execution assembly is fixedly connected with the outer wall of the valve pipe and comprises a first piston cylinder, a second piston cylinder, an isolation table shell and a valve rod, the valve rod transversely penetrates through the valve pipe, and a butterfly plate is arranged on the shaft section in the valve pipe; the first piston cylinder and the second piston cylinder are coaxially and oppositely arranged, a first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, and the first piston and the second piston are connected through a connecting cylinder; the first piston and the second piston are connected into a whole, and the movement of the first piston is under the combined action of the first piston cylinder and the second piston cylinder;
The first piston bottom in the pneumatic execution assembly still articulates there is the connecting rod, the connecting rod other end articulates on the swing arm, the swing arm other end is connected with the valve rod, the connecting rod can drive the swing arm and rotate, and then drive the valve rod and rotate, by first piston and the coaction of second piston, consequently, the rotation of valve rod receives the coaction of first piston cylinder and second piston cylinder, be provided with the slider on the swing arm, and it is provided with towards the perpendicular straight line spout of valve rod, the slider slides along straight line spout, the connecting rod articulates on the slider, the slider still is provided with the screw, the screw axis is perpendicular with the valve rod axis, the screw still coupling is provided with the lead screw, the lead screw rear end extends into in the valve rod, the lead screw passes through the transfer line drive within the valve rod, transfer line and valve rod coaxial line, transfer line axial extension is to the valve rod outside, be fixed with the first motor with the valve rod homonymy on the valve rod, first motor passes through drive gear train connection with the transfer line, first motor passes through drive gear train drive transfer line.
In the execution process, in order to accurately read the rotation angle of the valve rod, an angle sensor is fixed on the pneumatic execution assembly, the angle sensor is connected with the valve rod through an angle measurement gear set, and the angle sensor reads the rotation angle of the valve rod through the angle measurement gear set; through being connected angle sensor with the valve rod, make angle sensor can read the rotatory angle of valve rod, and then provide data support for follow-up spring and swing arm radius control.
Further, the first piston cylinder is connected with the second piston cylinder through an isolation table shell, the isolation table shell is provided with a chute for accommodating the connecting cylinder, a spring is further arranged between the isolation table shell and the first piston, the spring is sleeved outside the connecting cylinder, and the ends of the two ends of the spring are respectively connected with the first piston and the isolation table shell; by arranging the spring, after the air pressure of the control port is reduced, the spring can drive the first piston to move, the first piston drives the connecting rod to move, the connecting rod drives the swing arm to rotate, and the swing arm drives the valve rod to rotate, so that the valve pipe is closed; in addition, through respectively with the spring both ends with first piston and isolation platform shell fixed connection, can drive spring compression or extension when making the rotatory collection dish that corresponds the setting.
In order to ensure that the air pressure of the air chamber input by the valve pipe is stable, a safety valve is further arranged on the outer side of the pipe wall of the fluid output end of the valve pipe, the safety valve is also communicated with an air duct, the air duct is communicated with the inner side of the valve pipe, and the other end of the air duct is communicated with a second piston cylinder; through communicating valve pipe fluid output end with the second piston cylinder, make the atmospheric pressure in the second piston cylinder keep unanimous with the atmospheric pressure of air current output end, and then cooperate the rotation angle of first piston cylinder adjustment valve rod.
Preferably, the top end of the first piston cylinder is also provided with a control port, the control port is an air guide port connected with the outer side, and the air input/output air control system inputs or outputs air to the first piston cylinder through the control port.
Preferably, a storage disc is further arranged between the first piston and the isolation table shell, the storage disc is hinged on the isolation table shell through a valve rod, the storage disc is provided with an inner tube and an outer tube, the inner tube and the outer tube are coaxial, the inner tube and the first piston cylinder are coaxial, a bearing is coaxially fixed on the inner side of the inner tube, the bearing is sleeved on a pipe frame arranged on the isolation table shell, a first gear is coaxially fixed on the outer side of the inner tube, a horizontal disc is further connected on the upper portion of an inner tube ring, a sliding opening is formed in the horizontal disc, a spring penetrates through the sliding opening, the circumference of the disc extends outwards to be connected with the outer tube, and a blocking piece obliquely downward is further arranged on the outer side of the top of the inner tube; through setting up the containing disc to pass the spring in its sliding port, the containing disc carries out rotatable design simultaneously, when making the containing disc rotatory, can compress the spring in the containing disc or will compress in the space between first piston and the containing disc in the middle of the spring release in the containing disc.
Further, the first gear is further provided with a driving gear in a meshed mode, the driving gear is connected with a driving shaft, the driving shaft is connected with a reduction gearbox arranged on the outer side of the pneumatic execution assembly, the reduction gearbox is connected with a second motor, and the second motor drives the reduction gearbox to move so as to drive the driving shaft to rotate; the reduction gearbox is driven by the second motor, the first gear is driven to rotate by the reduction gearbox, and the storage disc is driven to rotate by the first gear.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. Compared with the prior art, the two ends of the spring are respectively fixed on the first piston and the isolation table shell, the rotatable containing disc is arranged on the isolation table shell, a certain spring allowance is arranged in the containing disc, namely, a part of spring is compressed in the production stage, when the spring between the containing disc and the first piston has the condition that the elasticity is reduced, namely, after the preset air pressure enters the first piston through the control port, the valve rod exceeds the preset rotation angle (calculated through the angle sensor), or after the first piston cylinder is depressurized through the control port, the butterfly plate is not completely closed (the valve rod is not rotated to the completely closed angle), the containing disc can be rotated to release part of the spring compressed in advance, so that the spring elasticity between the containing disc and the first piston is increased, and meanwhile, whether the elasticity after the release reaches the standard is measured through the angle sensor, namely, the change of the preset air pressure is matched through the angle sensor, and whether the valve rod rotates to the preset angle is compared; further, if the spring force between the first piston and the storage disc still does not meet the requirement (the spring force is attenuated too much) after the spring of the storage disc is completely released, the transmission rod is driven by the first motor to rotate, the transmission rod drives the screw rod to rotate, the rotation radius of the swing arm is increased or reduced, the rotation angle of the valve rod is adjusted by matching with the change of the displacement of the connecting rod, namely, when the valve tube is closed, the spring force is insufficient, the butterfly plate cannot be completely closed (the extension stroke is insufficient), the rotation radius of the swing arm is reduced at the moment, the connecting rod can be used for expanding the rotation angle of the valve rod in a limited way, when the valve tube is opened, the butterfly plate is excessively opened (the compression stroke is too long), the rotation angle of the valve rod is too large, and the rotation radius of the swing arm is increased at the moment, and the rotation angle of the valve rod can be effectively reduced;
2. Compared with the prior art, the containing disc provided by the invention can release part of the pre-compressed spring, so that the spring between the containing disc and the first piston can be restored to elasticity, the containing disc can also reversely rotate to continuously compress the spring, when a gas control system of a control port fails, the containing disc can continuously compress the spring to pull the first piston to move downwards, correspondingly drive the valve rod to rotate, simultaneously, the spring can be rotationally released, so that the first piston returns to an initial position, the first piston can drive the butterfly plate to close the valve tube, after the air pressure of the first piston cylinder fails, the containing disc can be used for emergency closing the valve tube or opening the valve tube, the air at the fluid output end of the valve tube can be controlled in an emergency manner to meet the opening and closing requirements of the valve tube in a short time, a certain space is provided for a maintenance period, and the occurrence of emergency is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic diagram of an embodiment;
FIG. 2 is a schematic diagram of an embodiment cut;
FIG. 3 is a schematic diagram of a detail at A in FIG. 2;
FIG. 4 is a schematic view of an embodiment cut;
FIG. 5 is a schematic view of an embodiment cut;
FIG. 6 is a schematic diagram of a detail at B in FIG. 5;
FIG. 7 is a schematic view of an embodiment cut;
FIG. 8 is a schematic diagram of an embodiment cut;
FIG. 9 is a schematic diagram of detail C in FIG. 8;
FIG. 10 is a schematic diagram of an embodiment;
FIG. 11 is a schematic view of detail D in FIG. 10;
FIG. 12 is a schematic illustration of an example valve stem, swing arm, and connecting rod connection;
FIG. 13 is a schematic view of detail E in FIG. 12;
FIG. 14 is a schematic view of an example valve stem, swing arm, and connecting rod axial connection;
Fig. 15 is a schematic view of a slider structure according to an embodiment.
The reference numerals are represented as follows: the device comprises a valve tube, a 2-pneumatic execution assembly, a 3-valve rod, a 4-butterfly plate, a 5-first piston cylinder, a 6-control port, a 7-second piston cylinder, an 8-air duct, a 9-connecting cylinder, a 10-spring, an 11-first piston, a 12-second piston, a 13-transmission gear set, a 14-first motor, a 15-angle sensor, a 16-angle measurement gear set, a 17-swing arm, a 18-lead screw, a 19-slider, a 20-connecting rod, a 21-safety valve, a 22-containing disc, a 23-bearing, a 24-first gear, a 25-second motor, a 26-reduction gearbox, a 27-isolation platform shell, a 28-carriage, a 29-screw hole, a 30-pin roll, a 31-antiskid plate and a 32-linear sliding groove.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
As shown in fig. 1 to 15, the present embodiment provides a pneumatic valve capable of adjusting a compression stroke of a spring 10, which includes a pneumatic actuating assembly 2 and a valve tube 1, wherein the pneumatic actuating assembly 2 is fixedly connected with an outer wall of the valve tube 1, the pneumatic actuating assembly 2 includes a first piston cylinder 5, a second piston cylinder 7, a separation table shell 27 and a valve rod 3, the valve rod 3 transversely penetrates through the valve tube 1, a shaft section in the valve tube 1 is provided with a butterfly plate 4, the valve rod 3 rotates through the pneumatic actuating assembly 2 arranged outside the valve tube 1, and further drives the butterfly plate 4 to open or close in the valve tube 1, and the pneumatic actuating assembly 2 is driven by gas to drive the valve rod 3 to rotate; the first piston cylinder 5 and the second piston cylinder 7 are coaxially and oppositely arranged, the first piston cylinder 5 and the second piston cylinder 7 are tubular cylinder bodies, a first piston 11 is arranged in the first piston cylinder 5, a second piston 12 is arranged in the second piston cylinder 7, the first piston 11 and the second piston 12 are connected through a connecting cylinder 9, the connecting cylinder 9 is connected with the first piston 11 and the second piston 12 to form a double-head piston, and the double-head piston reciprocates in the axial direction of the first piston cylinder 5;
The bottom of the first piston 11 is also hinged with a connecting rod 20, the other end of the connecting rod 20 is hinged on a swing arm 17, the other end of the swing arm 17 is fixedly connected with a valve rod 3, the connecting rod 20 can drive the swing arm 17 to rotate so as to drive the valve rod 3 to rotate, the first piston 11 and the second piston 12 are driven to linearly reciprocate under the action of gas, in the process, the connecting rod 20 hinged on the bottom of the first piston 11 is driven to reciprocate, the swing arm 17 hinged on the other end of the connecting rod 20 is driven to swing by the connecting rod 20, the swing arm 17 which swings drives the valve rod 3 to reciprocate, the butterfly plate 4 also can open and close along with the valve rod 3, a sliding block 19 is arranged on the swing arm 17 and is provided with a linear sliding groove 32 which faces to the valve rod 3, wherein the linear sliding groove 32 is a rectangular groove with a long edge perpendicular to the valve rod 3, the sliding block 19 comprises a sliding block 28, the sliding block 28 is a U-shaped piece, the U-shaped opening of the sliding frame is vertical to the valve rod 3, the U-shaped opening is vertical to the outer side of the valve rod 3, a pin shaft 30 is transversely arranged at the position of the U-shaped opening of the sliding frame 28, anti-slip plates 31 are arranged at two sides of the U-shaped bottom of the sliding frame 28 to prevent U-shaped parts arranged in a linear sliding groove 32 from sliding out, a screw hole 29 is arranged at the U-shaped bottom of the sliding frame 28, the axis of the screw hole 29 is vertical to the axis of the valve rod 3, a sliding block 19 slides along the linear sliding groove 32, the sliding block 19 is hinged with a connecting rod 20 through the pin shaft 30, the radius of the connecting rod 20 for driving the swing arm 17 to rotate is changed in the process of sliding the sliding block 19 in the vertical direction of the valve rod 3, namely the radius of the swing arm 17 rotating is changed under the action of the sliding block 19, the screw hole 29 is also coupled with a screw rod 18, the rear end of the screw rod 18 extends into the valve rod 3, the screw rod 18 is driven by a transmission rod in the valve rod 3, the transmission rod is coaxial with the valve rod 3, the transmission rod axially extends to the outer side of the valve rod 3, a first motor 14 which faces the valve rod in the same direction is fixed on the valve rod 3, the first motor 14 is connected with the transmission rod through a transmission gear set 13, the first motor 14 drives the transmission rod through the transmission gear set 13, the first motor 14 is fixed on the valve rod 3 and rotates along with the valve rod 3, after the first motor 14 drives the transmission gear set 13 to drive the transmission rod, the transmission rod drives a screw rod 18 to rotate, the screw rod 18 rotates to drive a sliding block 19 to slide on a swing arm 17, the rotating radius of the swing arm 17 is changed, and after the rotating radius of the swing arm 17 is changed, a connecting rod 20 drives the valve rod 3 to rotate, the angle of which changes along with the following.
In the conventional pneumatic execution assembly 2 design, the swing arm 17 is usually used as a fixed connecting piece to connect the connecting rod 20, which does not have the function of adjusting the rotation radius, and the swing arm 17 of the embodiment can change the rotation radius according to the requirement by arranging the corresponding slide block 19 and the slide block 19 displacement driving component, so that the embodiment can further compensate the rotation angle of the valve rod 3 after the elastic force of the spring 10 is attenuated, and the embodiment has higher service life.
An angle sensor 15 is further fixed on the pneumatic execution assembly 2, the angle sensor 15 is connected with the valve rod 3 through an angle measurement gear set 16, the angle sensor 15 reads the rotation angle of the valve rod 3 through the angle measurement gear set 16, the valve rod 3 rotates to drive the angle measurement gear set 16 to rotate, the angle measurement gear set 16 rotates to drive the angle sensor 15 to rotate, the valve rod 3 rotates to different angles, the angle sensor 15 is driven to rotate by a specific gear ratio of the angle measurement gear set 16, the rotation angle of the valve rod 3 can be calculated through the gear ratio of the angle sensor 15 and the angle measurement gear set 16, and then the rotation position of the valve rod 3 is determined.
The first piston cylinder 5 is connected with the second piston cylinder 7 through an isolation table shell 27, the isolation table shell 27 is provided with a chute for accommodating the connecting cylinder 9, a spring 10 is further arranged between the isolation table shell 27 and the first piston 11, the spring 10 is sleeved outside the connecting cylinder 9, two end heads of the spring 10 are respectively connected with the first piston 11 and the isolation table shell 27, and it is worth mentioning that the pneumatic valve in the embodiment belongs to a Honival pneumatic principle execution valve, and in the design, after the air pressure of the spring 10 serving as the first piston 11 is reduced, the first piston 11 is pushed to return to the initial position, and meanwhile, the butterfly plate 4 is also driven to be closed.
The safety valve 21 is further arranged on the outer side of the pipe wall of the fluid output end of the valve pipe 1, the safety valve 21 is further communicated with the air duct 8, the air duct 8 is communicated with the inner side of the valve pipe 1, the other end of the air duct 8 is communicated with the second piston cylinder 7, after the air pressure in the first piston cylinder 5 rises, the first piston cylinder 5 pushes the first piston 11 to move so as to drive the butterfly plate 4 to open, the air at the input end of the valve pipe 1 is output through the output end of the valve pipe 1, after the air at the fluid output end of the valve pipe 1 enters, the air pressure rises, the rising air pressure is in the second piston 12 entering through the air duct 8, the second piston 12 is matched with the spring 10 to push the first piston 11 reversely, so that the connecting rod 20 is driven to return to the initial position to move, the valve rod 3 is driven to adjust the angle, the air pressure at the output end is also controlled, after the air pressure reaches a preset value, the second piston 12 is matched with the spring 10 so as to push the first piston 11 to return to the initial position, the butterfly plate 4 closes the valve, and the air pressure at the fluid output end of the valve 1 is prevented from being excessively high by the safety valve 21.
The top end of the first piston cylinder 5 is also provided with a control port 6, the control port 6 is an air guide port connected with the outside, the air pressure of the first piston cylinder 5 is regulated by an air pressure control unit connected with the control port 6, and the air pressure control unit does not belong to the scope of the embodiment.
The device comprises a first piston 11, a spacer table shell 27, a storage disc 22, a valve rod 3, an inner tube, an outer tube, a bearing 23, a horizontal disc, a sliding opening, a spring 10, a baffle plate, a spring 10 and a spiral spring 10, wherein the storage disc 22 is further arranged between the first piston 11 and the spacer table shell 27 and hinged to the spacer table shell 27, the storage disc 22 can rotate around the axis of the first piston cylinder 5, the storage disc 22 is provided with the inner tube and the outer tube, the inner tube and the outer tube are coaxial, the inner tube and the first piston cylinder 5 are coaxial, the bearing 23 is coaxially fixed on the inner side of the inner tube, the bearing 23 is sleeved on a pipe frame arranged on the spacer table shell 27, the first gear 24 is coaxially fixed on the outer side of the inner tube, the upper portion of the inner tube is further connected with the horizontal disc, the sliding opening is a smooth opening of the horizontal disc, the spring 10 penetrates through the sliding opening, the circumference of the disc extends outwards and is connected with the outer tube, the outer side of the top of the inner tube is further provided with the baffle plate obliquely downward and serves as a baffle plate separating the spring 10 from the first gear 24, when the storage disc 22 rotates, and the spring 10 cannot rotate when the storage disc 10 is connected to the first piston 11 and the spacer table shell respectively.
It should be noted that, in the existing pneumatic execution assembly 2, only the spring 10 is generally disposed at the bottom of the first piston 11, and the receiving disc 22 is not designed, so that the existing pneumatic execution assembly 2 lacks a means for supplementing the spring 10 after the spring 10 is attenuated, and only the corresponding components can be replaced for maintenance when maintenance is performed, while the embodiment can supplement the means for supplementing the spring 10, so that the embodiment has a longer service life compared with the existing pneumatic execution valve due to the design of the pneumatic execution assembly 2.
The first gear 24 is further engaged with a driving gear, the driving gear is connected with a driving shaft, the driving shaft is connected with a reduction gearbox 26 arranged outside the pneumatic execution assembly 2, the reduction gearbox 26 is connected with a second motor 25, the second motor 25 drives the reduction gearbox 26 to move and further drives the driving shaft to rotate, the second motor 25 is matched with the reduction gearbox 26 connected with the second motor to drive the driving gear to rotate (not shown in a driving gear diagram), the driving gear drives the first gear 24 to rotate, and a storage disc 22 fixed with the first gear 24 is synchronously driven to rotate to store or release the spring 10.
The principle of the embodiment is as follows:
The control port 6 of the embodiment is connected with a gas control system, the valve rod 3 of the embodiment drives the first piston 11 to be kept at an initial position (the initial position is that the first piston 11 is close to the top end of the first piston cylinder 5, and the butterfly plate 4 is in a closed state), the gas control system injects gas with first pressure into the first piston cylinder 5 through the control port 6, so that the first piston 11 receives the pressure of the gas and moves towards the second piston 12, in the process, the first piston 11 drives the connecting rod 20 hinged at the bottom to move, the connecting rod 20 drives the swing arm 17 to rotate, the other end of the swing arm 17 is fixedly connected to the valve rod 3, the swing arm 17 drives the valve rod 3 to rotate so as to drive the butterfly plate 4 to rotate, the valve pipe 1 is opened, the gas at the fluid output end of the valve pipe 1 is output into a corresponding target container (air chamber) through the other end (the fluid output end of the valve pipe 1), and the gas pressure of the target container is gradually increased due to the entering pressure of the gas flow, and the gas guide pipe 8 is also gradually increased through the gas pressure of the gas guide pipe 8, and the gas guide pipe 8 is gradually pushes the first piston 7 upwards to the first piston 7 to the opposite to the first piston 11, and the first piston 11 is pushed towards the first piston 11 to be correspondingly arranged in the opposite direction to the first piston 11, and the first piston 11 is pushed to be closed by the first piston 11 to move, and the first piston 11 is correspondingly designed to move, and the first piston 11 is opposite to the first piston 11; based on this, the opening/closing degree of the butterfly plate 4 is regulated by the pressure of the target container (air chamber) and the pressure of the gas injected from the control port 6.
The above principle is the common operation principle of the pneumatic execution valve, the embodiment further improves the spring 10 part and the swing arm 17 part, wherein the embodiment fixedly connects two ends of the spring 10 with the first piston 11 and the isolation table shell 27 respectively, and a storage disc 22 is arranged above the isolation table shell 27, one end of the spring 10 connected with the isolation table shell 27 is arranged below the storage disc 22, the spring 10 passes through a sliding port reserved by the storage disc 22, meanwhile, the storage disc 22 is driven by the second motor 25, when the second motor 25 drives the storage disc 22 to rotate, the spring 10 can be compressed from the bottom by utilizing the spiral characteristic of the spring 10, in the production process of the pneumatic execution assembly 2, a part of the spring 10 is reserved to be compressed in the storage disc 22, when the spring 10 elasticity between the storage disc 22 and the first piston 11 is reduced (the valve rod 3 is provided with the angle sensor 15, after the gas control system injects a certain amount of gas through the control port 6, if the rotation angle of the valve rod 3 becomes larger relative to the original data, it is indicated that the first piston 11 moves a longer distance, that is, the compressed stroke of the spring 10 becomes longer and the spring 10 force becomes weaker under a certain amount of gas, the rotating receiving disc 22 releases the reserved spring 10 to increase the spring force of the spring 10 between the receiving disc 22 and the first piston 11, so that the spring 10 force is compensated (under the condition that a certain amount of gas is injected into the control port 6 through the angle sensor 15, the rotation angle of the valve rod 3 is read, whether the spring 10 force is restored to the original spring force value is judged), if the spring 10 force is seriously attenuated, the compressed spring 10 in the receiving disc 22 is completely released and cannot restore the original spring force value, further, when the elastic force of the spring 10 is attenuated too much, under a certain amount of air, the compression stroke of the spring 10 is increased, the opening of the valve tube 1 is too large, the air flow passes through the valve tube 1 too much, the air pressure of a target container (air chamber) is not ensured, at the moment, the first motor 14 rotates to drive the transmission rod to rotate, the transmission rod drives the screw rod 18 to rotate (a gear set which can be directly and vertically driven by the transmission connection between the transmission rod and the screw rod 18 can be in worm gear transmission) so as to drive the slide block 19 to slide in a direction far away from the valve rod 3 (the initial slide block 19 is arranged in the middle position of the linear chute 32, so that the slide block 19 can slide at two sides of the linear chute 32, and the slide block 19 slides in the direction far away from the valve rod 3, namely the rotating radius of the hinged position of the connecting rod 20 and the swing arm 17 is not ensured, and fig. 14 is a diagram showing that the slide block 19 is far away from the valve rod 3), so that the rotating angle of the connecting rod 20 can drive the swing arm 17 is reduced, and the slide rod 20 is displaced under the condition that the elastic force of the compensation spring 10 is weakened, so that the defect that the rotating angle of the valve rod 3 is excessively is driven; when the gas control system reduces the pressure of the injected gas through the control port 6, the elasticity of the spring 10 is weakened, the extension stroke of the spring 10 is reduced, the displacement of the driving connecting rod 20 is reduced, the valve tube 1 is not tightly closed, the first motor 14 is controlled, the sliding block 19 slides towards the position close to the valve rod 3, the rotation radius of the swing arm 17 is reduced, the rotation radius of the valve rod 3 is enlarged, the valve tube 1 is completely closed, it is worth mentioning that in the valve tube 1, the opening and closing state of the valve tube 1 and the position of the butterfly plate 4 can be determined by the angle sensor 15, therefore, the angle sensor 15 can provide the necessary parameters for judging the displacement of the sliding block 19 and the elasticity change of the spring 10, and the electronic calibration method of the type is quite conventional means in the current electronic technical environment, and meanwhile, the embodiment is not a distinguishing feature of the embodiment, but only mentioned briefly.
On the basis of the change of the elasticity of the compensation spring 10, the functions of the compression spring 10 and the release spring 10 of the storage disc 22 of the embodiment also have a certain degree of emergency opening and closing capability, when a gas control system fails, the storage disc 22 can enable the spring 10 to finally pull the first piston 11 through the compression spring 10 so as to drive the connecting rod 20 to displace and open the valve tube 1, otherwise, the elasticity of the spring 10 between the storage disc 22 and the first piston 11 is continuously increased by releasing the spring 10 through the storage disc 22, and finally the connecting rod 20 is driven to displace so as to close the valve tube 1, and the existing pneumatic execution valve usually loses the opening and closing capability after the gas control system fails; at the same time, the design of the accommodating disc 22 and the swing arm 17 of the embodiment fails and does not affect the work of the pneumatic execution valve of the embodiment, so that the embodiment still has the performance of the existing pneumatic execution valve, and the embodiment also has good safety performance.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (3)
1. The pneumatic valve capable of adjusting the compression stroke of the spring (10) comprises a pneumatic execution assembly (2) and a valve pipe (1), and is characterized in that the pneumatic execution assembly (2) is fixedly connected with the outer wall of the valve pipe (1), the pneumatic execution assembly (2) comprises a first piston cylinder (5), a second piston cylinder (7), an isolation platform shell (27) and a valve rod (3), the valve rod (3) transversely penetrates through the valve pipe (1), and a butterfly plate (4) is arranged on the shaft section in the valve pipe (1); the first piston cylinder (5) and the second piston cylinder (7) are coaxially and oppositely arranged, a first piston (11) is arranged in the first piston cylinder (5), a second piston (12) is arranged in the second piston cylinder (7), and the first piston (11) and the second piston (12) are connected through a connecting cylinder (9);
The bottom of the first piston (11) is also hinged with a connecting rod (20), the other end of the connecting rod (20) is hinged on a swing arm (17), the other end of the swing arm (17) is connected with a valve rod (3), a sliding block (19) is arranged on the swing arm (17) and is provided with a linear sliding groove (32) which faces to the direction perpendicular to the valve rod (3), the sliding block (19) slides along the linear sliding groove (32), the connecting rod (20) is hinged on the sliding block (19), the sliding block (19) is also provided with a screw hole (29), the axis of the screw hole (29) is perpendicular to the axis of the valve rod (3), the screw hole (29) is also coupled with a screw rod (18), the rear end of the screw rod (18) extends into the valve rod (3), the screw rod (18) is driven by a transmission rod in the valve rod (3), the transmission rod axially extends to the outer side of the valve rod (3), a first motor (14) which faces to the same direction as the valve rod is fixed on the valve rod (3), the first motor (14) is connected with the transmission rod through a transmission gear set (13), and the first motor (14) drives the transmission rod through the transmission gear set (13);
An angle sensor (15) is also fixed on the pneumatic execution assembly (2), the angle sensor (15) is connected with the valve rod (3) through an angle measurement gear set (16), and the angle sensor (15) reads the rotation angle of the valve rod (3) through the angle measurement gear set (16);
The first piston cylinder (5) is connected with the second piston cylinder (7) through an isolation table shell (27), the isolation table shell (27) is provided with a chute for accommodating the connecting cylinder (9), a spring (10) is further arranged between the isolation table shell (27) and the first piston (11), the spring (10) is sleeved outside the connecting cylinder (9), and two end heads of the spring (10) are respectively connected with the first piston (11) and the isolation table shell (27);
The outer side of the pipe wall of the fluid output end of the valve pipe (1) is also provided with a safety valve (21), the safety valve (21) is also communicated with an air duct (8), the air duct (8) is communicated with the inner side of the valve pipe (1), and the other end of the air duct (8) is communicated with a second piston cylinder (7);
a containing disc (22) is further arranged between the first piston (11) and the isolation table shell (27), the containing disc (22) is hinged on the isolation table shell (27) through a valve rod (3), the containing disc (22) is provided with an inner tube and an outer tube, the inner tube and the outer tube are coaxial, the inner tube and the first piston cylinder (5) are coaxial, a bearing (23) is coaxially fixed on the inner side of the inner tube, the bearing (23) is sleeved on a pipe frame arranged on the isolation table shell (27), a first gear (24) is coaxially fixed on the outer side of the inner tube, a horizontal disc is further connected on the upper part of the inner tube ring, a sliding opening is a smooth opening of the horizontal disc, a spring (10) penetrates through the sliding opening, the circumference of the disc extends outwards to be connected with the outer tube, and a baffle sheet obliquely downwards is further arranged on the outer side of the top of the inner tube; the spring (10) itself cannot rotate;
When the elasticity of the spring (10) between the containing disc (22) and the first piston (11) is reduced, namely after the preset air pressure enters the first piston (11) through the control port (6), the valve rod (3) exceeds a preset rotation angle, or after the first piston cylinder (5) is decompressed through the control port (6), the butterfly plate (4) is not completely closed, namely the containing disc (22) can be rotated to release part of the pre-compressed spring (10), so that the elasticity of the spring (10) between the containing disc (22) and the first piston (11) is increased, and meanwhile, whether the elasticity after the release reaches the standard or not is measured through the angle sensor (15), namely, the change of the preset air pressure is matched through the angle sensor (15), and whether the valve rod (3) rotates to a preset angle is compared; if the spring (10) of the storage disc (22) is completely released, under the condition that the elasticity of the spring (10) between the first piston (11) and the storage disc (22) still does not meet the requirement, the first motor (14) drives the transmission rod to rotate, the transmission rod drives the screw rod (18) to rotate, the rotation radius of the swing arm (17) is increased or reduced, and the rotation angle of the valve rod (3) is adjusted in cooperation with the change of the displacement of the connecting rod (20).
2. A pneumatic valve with adjustable compression stroke of a spring (10) according to claim 1, characterized in that the top end of the first piston cylinder (5) is further provided with a control port (6), the control port (6) being a gas guide port connected to the outside.
3. A pneumatic valve with adjustable compression stroke of a spring (10) according to claim 1, characterized in that the first gear (24) is further provided with a driving gear in a meshed manner, the driving gear is connected with a driving shaft, the driving shaft is connected with a reduction gearbox (26) arranged outside the pneumatic execution assembly (2), the reduction gearbox (26) is connected with a second motor (25), and the second motor (25) drives the reduction gearbox (26) to move so as to drive the driving shaft to rotate.
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| CN202410278467.6A CN117889225B (en) | 2024-03-12 | 2024-03-12 | Pneumatic valve capable of adjusting compression stroke of spring |
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| CN118499550B (en) * | 2024-07-19 | 2024-09-17 | 四川顺腾机械制造有限公司 | High-pressure air flow valve for airplane |
| CN118634588B (en) * | 2024-08-13 | 2024-10-18 | 四川顺腾机械制造有限公司 | High-pressure bleed valve for aircraft |
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