Single acting actuator

 

(57) Abstract:

The invention relates to pneumatic and hydraulic actuators with manual override. The invention consists in that the actuator, comprising a housing with a nozzle for supplying the control pressure, the piston and one or more elastic elements, the latter mounted for engagement with the sleeve, which is connected to a shaft of the handwheel and stem of the Executive body, through the support, which is made with vertical Windows and a ring. In Windows posted by projections made on the sleeve, and a ring mounted with a gap with respect to the lugs of the sleeve. In addition, the piston can be made rigidly connected with the support and the stem of the Executive body. 1 C. p. F.-ly, 3 ill.

The invention relates to pneumatic, hydraulic actuators with manual override and can be used to control pipeline valves in many industries, such as oil, gas, shipbuilding, atomic energy for overlapping pipelines both automatically and manually.

Known single acting actuator with handwheel used in valves for peeny JSC "Banner of labor" to them. I. I. Lepse, see product catalogue "Industrial valves" [1]

In this actuator, the elastic element (spring) is installed between the stem of the Executive authority, is an integral whole with the piston, and a housing cover of the drive.

When working manual override piston acts on the spring, which is compressed by the amount of the stroke, and managed the valve is opened.

The disadvantage of this drive is that when the work is necessary to overcome the working force of the spring. This limits the use of such actuators with manual override as DN and PN valves, on which is mounted the drive, because of the large effort that must be applied when running a manual backup. To eliminate the need for greater effort to handle (the handle) of the handwheel on the drive you have to install the reducer that increases the weight and size characteristics and the manufacturing cost of the drive.

The closest analogue of the known actuator is single acting actuator [2] comprising a housing with a nozzle for supplying the control pressure in the cavity which is placed a piston, and one or more elastic elements and the stem of the Executive body.

The problem of reducing effort on the handle of the handwheel solved by creating a pre-tension elastic (- ) item (s) when the actuator from the control pressure and to relieve tension when the drive of the handwheel.

The disadvantages of the drive [2] include the fact that when the manual override is necessary to make the total course: first course to relieve the spring tension to its free state, and then to make a working stroke of the Executive (locking) of the body. This is due to the presence of gaps between the end face of the head of the rod and collar, on the one hand, and between the cylinder rod and the bottom of the hollow cavity, with the other hand. The gap between the cylinder rod and the collar corresponds to the installation of the SAG (preload) elastic (- ) element (s) (spring), and the gap between the cylinder rod and the bottom should not be less than the magnitude of the stroke of the spring.

The consequence is a significant increase in weight and size characteristics of the product, as well as reduced resource pairs of friction node of the handwheel and reduction of technological design.

The invention solves the problem:

1. Reducing weight and size characteristics due to the exclusion of the stroke of pinotti action of the tension spring when the work manual handwheel;

3. Simplify the design due to manufacturability and reduce the number of parts.

All this increases the reliability of the drive.

This is accomplished due to the fact that in the single acting actuator, comprising a housing with a nozzle for supplying the control pressure in the cavity which is placed a piston, and one or more elastic elements mounted on a support with the ability to interact with bushing, which is connected to a shaft of the handwheel and stem of the Executive body, the support has a window, which posted the projections made on the sleeve, and a ring with a gap with respect to the lugs.

In addition, the piston can be rigidly connected with the support and the stem of the Executive body.

In the drawings shows two execution drive: Fig. 1 drive with "floating" piston; Fig. 2 section a-a for Fig. 1 and Fig. 3. Fig. 3 the actuator piston rigidly connected with the support and the stem of the Executive body.

The actuator includes a housing 1 with the fitting 2. In the cavity 3 of the housing 1 posted by piston 4. On a support 5 that is associated with the stem 6 of the Executive authority, are one or more flexible elements 7 made in the form, for example, springs, and made the window (end-to-end and. The sleeve 9 is located between the flexible elements 7 and the rod 10 of the handwheel, has projections 11. The protrusions 11 posted by Windows 8, forming a gap 12 with the ring 13 mounted on the support 5. In the cover 14 of the actuator installed in the threaded sleeve 15 by bearings 16 and 17. Keyed (splined connection 18 "cover 14 and the rod 10" converts rotational motion of the flywheel 19 through the sleeve 15 in the forward movement of the rod 10 of the handwheel.

The piston 4, the support 5 and the rod 6 of the Executive body can be rigidly connected, for example, executed as a single unit (Fig. 3).

The actuator is as follows.

The control pressure through the fitting 2 is fed into the cavity 3 of the housing 1, the impact piston 4, which is moving, is in contact with the support 5 and compresses the spring 7, through which the protrusions 11 of the sleeve 9, placed in the Windows 8, transmits the force of the compression (tension) through the rod 10, the threaded sleeve 15 and the bearing 16 in the cover 14. Together with move support 5 moves the associated rod 6.

After a reset, the control pressure from the cavity 3 of the piston 4 and the piston rod 6 together with support 5 under the influence of spring 7 returns to its original position.

When the drive is selected from (slot) connection 18 and choosing the gap 12. After that, the protrusions 11 of the sleeve 9 through the Windows 8, in contact with the ring 13, after which the spring 7, the closed force on the support 5, becomes passive when you move the supports 5 and rods 10 and 6. When the piston 4 is at rest. When the bearing 5, the piston 4 and the rod 6 are rigidly connected (Fig. 3), the piston 4 does move together with the support 5 and the rod 6 and 10. Thus the force required for manual backup when moving, is spent only on overcoming the frictional forces of the weight of the moving parts and the weight of these moving parts, and an axial force when the drive control is perceived by the bearing 17.

To return the rod to its original position rotate the flywheel 19 together with a threaded sleeve 15 in the opposite direction, moving forward rod 10 with the sleeve 9, and the spring 7 together with the support 5, the rod 6 and the ring 13 to the stop of the output of the link rod 6. When the piston 4, the support 5 and the rod 6 are rigidly connected (Fig), the piston 4 moves together with the support 5 and the rod 6 and 10. When the piston 4, the support 5 and the rod 6 are dormant, and the rod 10 and the sleeve 9 compress the spring 7 on clearance size 12, exercising, thus, the transfer of regulated UserA to supply the control pressure, in the cavity of which is placed a piston, and one or more elastic elements mounted on a support with the ability to interact with bushing, which is connected to a shaft of the handwheel and stem of the Executive body, characterized in that the bearing has a window, which posted the projections made on the sleeve, and a ring with a gap with respect to the lugs of the sleeve.

2. Drive under item 1, characterized in that the piston is rigidly connected with the support and the stem of the Executive body.

 

Same patents:

The invention relates to a pipeline shut-off valves, in particular to manual actuators used in gate valves, shut-off valves

The invention relates to the field of engineering, and more specifically to devices for the transmission of motion

Pneumatic actuator // 2073127
The invention relates to the field of engineering, in particular, to mechanisms to translational movement of the rod of the working bodies

The hydraulic // 2073093
The invention relates to hydromelioration and can be used in rotary actuators

Cylinder // 2072455
The invention relates to mechanical engineering and can be used as hydraulic machines working in conditions of high loads

The invention relates to hydroprogesterone and can be used to drive valves, control surfaces, doors, gates and hatches, hydraulically operated hinges robots, tool accessories

Pneumohydrodevices // 2070673

Pneumatic cylinder // 2068121

FIELD: fluid-pressure actuators.

SUBSTANCE: air distributor comprises housing, two valves for opening and closing provided with four closure members, air-operated device for control of the valves, electropneumatic control valve, actuator for manual doubling of electric control signal, and system of working valves and air lines that connect the valves and the valves with the actuator. The drive of manual doubling of the electric control signals built in the line for supplying control pressure between the electropneumatic control valve (source of the control pressure) and valves for closing and opening and is made of a plunger.

EFFECT: enhanced reliability.

3 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: air distributor comprises plunger-actuator of the manual doubling of electric signal mounted inside the hosing and provided with the chamber for its control from the external source of the air signal.

EFFECT: enhanced reliability.

1 cl, 4 dwg

Mechanical muscle // 2247875

FIELD: devices for transformation of intrinsic energy of an energy carrier into mechanic motion of technical objects.

SUBSTANCE: the invention presents a mechanic muscle intended for transformation of intrinsic energy of an energy carrier into mechanic motion of technical objects with variable inertial parameters. The mechanic muscle contains some connecting elements and a filled in with energy carrier elastic shell reinforced in transversal and longitudinal directions by flexible non-expandable filaments. At that reinforcement in the longitudinal direction is made with a step ensuring a transversal deformation of the shell without a loss of leakproofness and reinforcement of the shell in the transversal direction is made with a step selected from conditions of provision of maximum shortening of an shell at simultaneous decrease of its transversal size, consumption of the energy carrier and increased response speed. At that the longitudinal reinforcement of the elastic shell is made layer-by-layer. And the discharge-antifriction layer is made out of continuous mutually crossing filaments helically laid on the shell surface. At that a step of the helical laying of the filaments of a next layer is equal to the previous one. Direction of a helical laying of the filaments of the next layer is a counter-directional to a previous one. Filaments of the layers are not linked among themselves and from interlayer rhombic cells, which diagonals are commensurable with value of deformation of the shell in an axial and in diametrical directions under a rhombic cell. At that the filaments of the next layer are shifted concerning to the filaments of the previous layer having the same direction of a step of the helical laying. The filaments of each layer are fixed concerning to adapters of the muscle separately from the shell and the length of an axial projection of the filaments exceeds the length of the shell, the energy layer is made out of the longitudinally oriented filaments fixed in respect to the adapters of the muscle and separately from the shell. At that the adapters of the mechanic muscle contain two coaxial surfaces for a separate fixation of the shell and the reinforcing filaments. At that the surfaces are partitioned by a ring-type boss, the height of which concerning to a surface for fixation of the shell corresponds to the thickness of the elastic shell. The adapters themselves or their external surface are made out of an electrical insulating material and contain gauges to control the working medium pressure and mutual motion of the adapters. Besides a decorative protective layer may be made out of the continuous filaments helically laid on the surface of the muscle. At that a step of a helical laying of the filaments of the next layer is equal to the previous step and direction of the step of the helical laying of the filaments of the next layer is counter-directional to the previous one. The filaments of the layers are not connected to each other and form the inter-layer rhombic cells. At that the filaments of a next layer are shifted to the filaments of the previous layer having the same direction of the step of the helical laying. And the filaments of each layer are fixed concerning to the adapters of the muscle and separately from the shell. The technical result is increased reliability.

EFFECT: the invention ensures an increase of reliability of operation of the mechanical muscle.

2 cl

FIELD: drives for various mechanisms.

SUBSTANCE: proposed hydraulic motor has housing with two separating stops and two-blade coil-type rotor; cavities between them form working chambers of hydraulic motor. Sectional coil-type rotor has two bushes with insert placed between them; this insert has cylindrical central part and two opposite blades; bushes and insert are tightened in housing on shaft; holes made in blades of insert and bushes in parallel with shaft axis are used for mounting pins. At the end of travel of rotor blades, damping moment is created on rotor in hydraulic motor by communicating the working chamber of hydraulic motor forcing out the working fluid with working fluid delivery passage through groove on inner plane of rotor bush and central hole in plunger received by bore separating stop which is pressed to bush plane by means of spring and pressure of working fluid.

EFFECT: reduction of mass and overall dimensions.

3 dwg

FIELD: automatic controls.

SUBSTANCE: invention relates to power control systems operating on gaseous medium and it can be used at designing flying vehicle control actuators. According to control signal of operating pressure differential in spaces of pneumatic actuator, area of technological clearance is changed simultaneously and purposely by means of areas of throttling holes of pneumatic distributor in which technological clearance is made to compensate for influence of external factors onto dynamic characteristics of pneumatic actuator. Proposed pneumatic control actuator consists of housing which accommodates slave motor with piston rigidly coupled with actuators of flying vehicle. Pneumatic distributor is spool type, its movable part is secured on cantilever part of axle of electromechanical converter armature secured on actuator housing being installed with technological clearance relative to fixed part of pneumatic distributor. Axle of armature of electromechanical converter is arranged square to plane in which spool displaces, being installed so that ratio of value of technological clearance to length l of axle of armature from movable part of spool to place of its fastening in housing of electromechanical converter corresponds to relationship

where is relative speed of actuator; is maximum speed of actuator; is relative temperature; is nominal temperature for which is found; is nominal technological clearance at is relative change of technological clearance; are temperature expansion coefficients of different material of axle of electromechanical converter and its housing. Area at technological clearance related to maximum regulated area of through section in spool distributor is within 0.08-0.12.

EFFECT: simplified design.

3 cl, 7 dwg

Mechanical muscle // 2255251

FIELD: pneumohydraulic motors of translational motion.

SUBSTANCE: in proposed mechanical muscle modes and conditions of operation of material of elastic envelope and longitudinal reinforcement threads are matched. Two boundary layers with different functions are formed in mechanical muscle. Boundary layers are formed by longitudinal reinforcement of elastic envelope with three independent groups of threads featuring different physical and mechanical properties and different geometry of laying.

EFFECT: improved reliability.

4 cl

FIELD: transportation.

SUBSTANCE: invention relates to device for reversible displacement of objects using filled elastic envelopes. Proposed device has conical torus formed by elastic envelope, tie-rod connected with object to be displaced, guide slings connected with elastic envelope, and working medium pressure source connected to inner space of torus. Conical torus for reversible action of device is introduced additionally. Toruses nested one in the other are made of truncated-cone elastic envelopes with open bases, one of which is longer than the other and is rolled inwards by larger base. Envelopes are interconnected at ends and clamped together mainly with tie-rod, for instance, by clamp on end of open bases to form two conical toruses with isolated hermetic inner spaces independently connected to working medium pressure source. Additional conical torus is also connected with its guide slings.

EFFECT: provision of reversibility of displacement of object.

5 dwg

Hydraulic cylinder // 2272940

FIELD: power engineering.

SUBSTANCE: hydraulic cylinder comprises housing with lids and fastening members, telescopic pipe provided with outer lid with fastening member and piston with guides and sealing members, and hollow rod with piston, guiding , and sealing members mounted inside the pipe. The telescopic pipe additionally has external supply and unmovable internal lid with guiding and sealing members. The hollow rod with piston has external supply and internal discharge of fluid and is mounted in the opposite direction to the extension of the telescopic pipe and passes through the back housing of the hydraulic cylinder additionally provided with the guides and sealing members. The longitudinal axes of the rod, telescopic pipe and housing of the hydraulic cylinder are in coincidence and, when the rod or telescopic pipe are completely extended, define the closed circumference.

EFFECT: expanded functional capabilities.

11 dwg

Hydraulic cylinder // 2272940

FIELD: power engineering.

SUBSTANCE: hydraulic cylinder comprises housing with lids and fastening members, telescopic pipe provided with outer lid with fastening member and piston with guides and sealing members, and hollow rod with piston, guiding , and sealing members mounted inside the pipe. The telescopic pipe additionally has external supply and unmovable internal lid with guiding and sealing members. The hollow rod with piston has external supply and internal discharge of fluid and is mounted in the opposite direction to the extension of the telescopic pipe and passes through the back housing of the hydraulic cylinder additionally provided with the guides and sealing members. The longitudinal axes of the rod, telescopic pipe and housing of the hydraulic cylinder are in coincidence and, when the rod or telescopic pipe are completely extended, define the closed circumference.

EFFECT: expanded functional capabilities.

11 dwg

FIELD: mechanical engineering.

SUBSTANCE: hydraulic positive-displacement drive comprises pump station that is composed of high pressure pump (1) and make-up pump (2) and hydraulic motors (7) and (8). The hydraulic motors are connected with the pump station through main pipelines (5) and (6) that define the hydraulic circuit. Hydraulic lines (5) and (6) are interconnected via by-pass hydraulic lines (21) and (22) that receive relief valves (23) and (24). The hydraulic line, which is in communication with hydraulic line (5), is mounted from one side of the valving member of valve (23). Line (25) connected with hydraulic line (5) through throttle (26) and with drain hydraulic line (28) through check valve 27 is mounted from the other side of the valving member. Hydraulic line connected with hydraulic line (6) is mounted from one side of the valving member of valve (24). Hydraulic line 29, which is connected with hydraulic line (6) through throttle (30) and drain hydraulic line (28) through the check valve (31), is mounted from the opposite side of the valving member. Hydraulic line (28) receives two-positioned four-line pilot valve (32) controlled by electrical means. In its one position, it communicates hydraulic line (28) with pressure gauge (34), and in its other position it communicates hydraulic line (28) and gauge (34) with drain hydraulic line (19).

EFFECT: enhanced reliability and expanded functional capabilities.

1 cl, 1 dwg

Up!