CN210461221U

CN210461221U - High-pressure digital proportional reversing valve with self-locking function

Info

Publication number: CN210461221U
Application number: CN201920405650.2U
Authority: CN
Inventors: 沈安明; 王海勇; 王从贤; 蔡增伸
Original assignee: Hangzhou Singo Technology Co ltd
Current assignee: Hangzhou Singo Technology Co ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-05-05
Anticipated expiration: 2029-03-21

Abstract

The utility model discloses a high-pressure digital proportional reversing valve with self-locking function, which comprises a motor, a transmission pinion, a transmission gear wheel, a threaded copper sleeve, a valve body, a rear cover, a lever, an electromagnet, a push rod, a copper plug, a sealing barrel, a tin bronze sleeve, a sealing gasket, a sealing ceramic ball, a ball seat, a spring, a gear box, a main valve core, a nylon plug and a ball expansion plug; the valve sleeve is matched with the valve body to form sealing; the middle of the rear cover is hollowed and connected with the main valve body and the electromagnet; the electromagnet props against the lower ball valve push rod through the lever; one end of the lever is propped against the ceramic sealing ball; the stop valve at the lowest end of the valve body is composed of a copper plug, a sealing threaded sleeve, a sealing gasket, a sealing ceramic ball, a ball seat, a spring and the like; the motor drives the main valve core through the gear box to realize the reversing and throttling functions of the main valve; the utility model discloses digital reversing valve has the structure miniaturization, can use under the super high pressure, the combined function is strong, can realize the switching-over and the throttle function to possess the characteristics from the locking.

Description

High-pressure digital proportional reversing valve with self-locking function

Technical Field

The invention belongs to the field of hydraulic digital valves, and relates to a high-pressure proportional reversing digital valve with a self-locking structure.

Background

The hydraulic digital valve is widely applied to the industries of testing instruments, various engineering machinery, aerospace, machine tools and the like. High pressure hydraulic systems may increase energy density to reduce overall hydraulic system cost. The high-pressure digital liquid proportional reversing valve with the self-locking function can be used in a high-pressure system in practical application, can replace the traditional reversing valve, a ball valve and a proportional digital valve, integrates the functions of a plurality of traditional valves, reduces the volume of the whole system, and is more convenient to control.

At present, in the prior art, a digital proportional reversing valve can well play roles of reversing and proportional throttling, but due to the fact that smooth switching and proportional throttling are needed, a gap between a valve body and a valve core cannot be small, and due to the fact that high pressure exists, leakage cannot occur at a middle position, and a stopping function is played. The common application is that a ball valve is connected in series on the basis of a digital proportional reversing valve to play a role in stopping and maintaining pressure. It is therefore of interest for compact applications if one valve can function as two valves, and the control difficulties of the hydraulic system are reduced.

Disclosure of Invention

The invention aims to provide a high-pressure digital proportional reversing valve with a self-locking function aiming at the improvement of the prior art, and the valve has the characteristics of simple structure, microminiaturization of structure, high integration level and simplicity in control.

The invention aims to realize a high-pressure digital proportional reversing valve with a self-locking function by the following technical scheme, which comprises a micro motor, a transmission pinion, a transmission gearwheel, a threaded copper bush, a valve body, a rear cover, a lever, an electromagnet, a push rod, a copper plug, a sealing screw sleeve, a tin bronze bush, a sealing gasket, a sealing ceramic ball, a ball seat, a spring, a gear box, a main valve core, a nylon plug, a ball expansion screw plug, an oil inlet channel and an oil outlet channel.

The micro motor is a power unit of a main valve and can be in the forms of motors such as a stepping motor, a micro servo motor and the like. The micro motor is driven by a driver, and various driver forms are different and are not expressed in the patent.

The transmission pinion is a gear pair formed by a gear with fewer teeth directly connected with a rotating shaft of the motor and a gear with more teeth connected with the valve core, so that the rotating motion of the motor shaft is converted into the linear motion of the valve core, and the effect of pushing the valve core to move forwards and backwards is achieved.

The transmission big gear wheel is a big gear wheel with more teeth and connected with the valve core and is matched with the transmission small gear wheel to achieve the effect of pushing the valve core to move forwards and backwards; the transmission gear wheel is provided with a stop block which is used for matching with the stop block on the gear box and positioning the position of the valve core.

The thread copper bush is used for installing the valve core and is matched with the external thread on the valve core, so that the valve core can rotate and move linearly.

The valve sleeve is embedded in the valve body by adopting a high-strength material, and the structure of the valve sleeve and the valve core are matched to change the size of a flow passage so as to achieve the function of driving the hydraulic oil to change the flowing direction; the structure is also different from the common medium-low pressure valve. The common medium-low pressure valve only has the matching function of the valve core and the valve body, and the valve body is difficult to normally work due to the structure and the material under the conditions of high pressure and ultrahigh pressure. The valve is made of high-strength materials and is consistent in structure, so that the ultrahigh-pressure hydraulic valve is easier to realize under the condition of high cost performance.

The valve body is respectively provided with a plurality of oil inlet channels, oil outlet channels and a plurality of process channels, and the valve sleeve is matched with the valve body to form sealing.

The back cover, the square end cover, the middle of the back cover is hollowed, and a pin for supporting the push rod is arranged and connected with the main valve body and the electromagnet.

One end of the lever is fixed on the end cover through a movable pin, the lower part of the lever props against the push rod of the stop valve part, the upper part of the lever props against the iron core of the electromagnet, and the push rod of the stop valve bears the spring force through the steel ball to enable the whole lever to be in a stable state.

The electromagnet pushes the iron core out when power is on, and the spring compresses the iron core of the electromagnet to the original position through the lever when power is off;

the push rod is made of high-hardness material Cr₁₂M_OV, one end of the lever is propped against the lever, and the other end of the lever is propped against the ceramic sealing ball.

The copper stopper is outer cylinder threaded structure, and the left end face blocks polyurethane oil seal, and right-hand member screw thread and big valve body cooperation, centre and push rod cooperation, right-hand member face have 2 mounting holes for screw up when the copper stopper is installed and use.

The sealing screw sleeve is of a cylindrical structure, is arranged in the valve body and is used for fixing the copper plug and further positioning the polyurethane oil seal, the tin bronze sleeve and the push rod.

The tin bronze sleeve is of a circular tube-shaped structure and is sleeved outside the push rod, the left side and the right side of the tin bronze sleeve respectively support the O-shaped rings and the polyurethane oil seals, and the O-shaped rings and the polyurethane oil seals on the two sides are positioned for use.

The sealing gasket needs to be matched with the sealing ceramic ball to play a role in sealing the hydraulic oil.

The sealing ceramic ball is made of ceramic materials.

The ball seat is embedded with the sealing ceramic ball, and the other end of the ball seat is sleeved at one end of the spring, so that the spring pushes the sealing ceramic ball to be matched with the sealing gasket to seal hydraulic oil.

The spring is arranged at the leftmost end of the lowest layer of the valve body and plays a role in pushing the sealing ceramic ball.

The gear box is made of aluminum, a large transmission gear and a small transmission gear are arranged in the gear box and are used for fixedly connecting the motor and the main valve body, the small gear is assembled on a motor shaft, the large gear is assembled on the main valve core, and the large gear and the small gear are meshed in the gear box; the inner side of the gear box is provided with a small stop block which can be used for colliding with a stop block on the transmission gear wheel and used for positioning the initial position.

The main valve element is a main body for realizing reversing and throttling functions, and is made of Cr12MoV materials, the large gear is fixed at the leftmost end, the part, close to the gear, of the left end is provided with threads, and when the large gear rotates under the driving of the small gear, the whole main valve element can rotate and translate left and right under the action of the threads.

The nylon plug is made of a nylon cylinder, one end of the nylon plug is slightly angled, and the nylon plug is used for sealing the right end of the main valve body and preventing overflowing hydraulic oil from flowing into a cavity of the rear cover.

When a steel ball is pressed to the bottom of the sleeve, the steel ball makes a section of the sleeve generate radial expansion, and axial stress is converted into radial expansion of the sleeve. At this point, the tines formed by the circumferential grooves in the sleeve are forced into the surrounding workpiece material, thereby creating an effectively high pressure.

Further, when the coil loses power, the lever loses electromagnetic force, the push rod is pushed to move from left to right along the axial direction under the action of the compression force of the return spring, and the sealing ceramic ball and the ball seat also move from left to right until an oil outlet passage between the sealing ceramic ball and the sealing threaded sleeve is sealed; at this moment, hydraulic oil can not circulate in the lower ball valve, and the flow passage from the oil inlet channel at the bottom of the valve to the oil outlet channel is blocked.

The beneficial results of the invention are:

(1) the high-pressure digital proportional reversing valve with the self-locking function has strong function and simple structure, can meet the requirements of multiple functions, and can be used under the requirements of high-pressure and other special working conditions or small-size installation under the environment with compact structure;

(2) the self-locking valve has a self-locking function, can realize reversing and proportional throttling under the working condition of ultrahigh pressure, can realize pressure locking under the condition of ultrahigh pressure, and has very small leakage amount and long pressure maintaining time;

(3) when the pressure is released during ultrahigh pressure locking, the bottom locking part can be opened through the electromagnet, the pressure is reduced through a trace gap of the main valve core, and the pressure is reduced through increasing leakage amount through the action of the main valve core after the pressure is reduced, so that the effect of avoiding hydraulic impact to the maximum extent is achieved;

drawings

FIG. 1 is an assembly diagram of a high-pressure digital proportional reversing valve with a self-locking function;

2 a-2 c are sectional views of the main valve body of the high-pressure digital proportional reversing valve with self-locking function;

FIG. 3 is a schematic diagram of a main valve core of a high-pressure digital proportional reversing valve with a self-locking function;

FIG. 4 is a schematic view of a main valve core choke and a pressure equalizing groove of a high-pressure digital proportional reversing valve with a self-locking function;

in the figure: 1-stepping motor, 2-transmission pinion, 3-transmission bull gear, 4-thread copper bush, 5-valve bush, 6-valve body, 7-rear cover, 8-lever, 9-electromagnet, 10-push rod, 11-copper plug, 12-sealing thread bush, 13-tin bronze bush, 14-sealing gasket, 15-sealing ceramic ball, 16-ball seat, 17-spring, 18-gear box, 19-main valve core, 20-nylon plug and 21-ball expansion thread plug.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

As shown in fig. 1 to 3, the high-pressure digital proportional directional valve with a self-locking function provided in this embodiment includes: the device comprises a motor 1, a transmission pinion 2, a transmission gearwheel 3, a threaded copper sleeve 4, a valve sleeve 5, a valve body 6, a rear cover 7, a lever 8, an electromagnet 9, a push rod 10, a copper plug 11, a sealing threaded sleeve 12, a tin bronze sleeve 13, a sealing gasket 14, a sealing ceramic ball 15, a ball seat 16, a spring 17, a gear box 18, a main valve element 19, a nylon plug 20 and a ball expansion plug 21.

As shown in fig. 2 a-2 c, the valve body 6 is a rectangular parallelepiped made of 40Cr material, and is provided with various channels, fabrication holes and through holes for installing the valve sleeve 5, the sealing screw 12, the sealing gasket 14, and the like. The first step is to press the valve sleeve 5 into the valve body 6 by interference and to confirm that it is in place. Further, the thread copper bush 4 is press-fitted in by interference fit. On the basis, the internal thread of the thread copper sleeve 4 and the inner wall of the valve sleeve 5 are finely processed.

Further, before the lower half of the valve is installed, the sealing ceramic ball 15 and the sealing gasket 14 are prepared, and the sealing ceramic ball 15 is fixed on the ball seat 16 after the requirement is met. The ball seat 16 has a small boss which can be mounted in a spring 17. After the assembly is installed, the assembly is inserted into the valve body 6 from right to left. The sealing ring and the sealing gasket are arranged in the sealing gasket 14, then are arranged in the valve body 6 from right to left, and are contacted and matched with the sealing ceramic ball 15. Further, after the seal ring and the seal gasket are installed in the seal threaded sleeve 12, the seal threaded sleeve 12 is installed in the valve body 6 by rotating from right to left. Further, the sealing ring, the sealing gasket and the tin bronze sleeve 13 are provided with the push rod 10, and then the assembly is pushed into the sealing threaded sleeve 12 from right to left until the sealing threaded sleeve 12 is contacted with the sealing ceramic ball 15. The push rod 10 is pressed to feel elasticity and can be completely reset. Further, the copper plug 11 is screwed into the sealing screw sleeve 12 to be installed and positioned, and the push rod 10 is sleeved by the copper plug.

Further, a lever 8 is fixed to the rear cover 7 by a pin. The nylon plug 20 is plugged into the right end of the valve body 6. Further, the rear cover 7 is fixed to the valve body 6 by bolts. Further, the electromagnet 9 is fixed to the rear cover 7 by bolts. So far, the right side of the valve is installed.

Further, a gear case 18 is fixed to the valve body 6 by bolts, a transmission gear 3 is fixed to a main valve element 19, and the main valve element 19 is rotated and fitted into the valve housing 5 by engaging the upper threads with the internal threads of the threaded copper bush 4. Further, the transmission pinion 2 is fixed on the motor 1, and then the motor 1 is engaged with the transmission gearwheel 3 and the transmission pinion 2 and is simultaneously installed on the gear box 18, so that the installation of the whole valve is completed.

The rotation of the motor 1 drives the transmission small gear 2 and the transmission big gear 3, and further drives the main valve core 19 to rotate and move forwards leftwards or rightwards. When the motor drives main valve element 19 to rotate rightwards to be blocked by two stop blocks and can not advance, the position is the starting point, namely main valve element 19 is in the rightmost state, and is in P-channel B and A-channel T at the moment. Further, the valve core position gradually moves leftwards, the through port areas of the port P and the port B are gradually reduced, the port B and the port T are gradually communicated, the through port areas are gradually increased, and the valve core position is in a proportional throttling state of the port B. When main valve element 19 moves further to the left to a certain position, the passage of port P and port B is completely cut off. Neither port P nor port A, B is open, both ports T and A, B are open, and the valve remains fully closed for the distance main spool 19 travels from this position. Further, main valve element 19 continues to move to the left, with the port area between P and A gradually increasing and the port area between A and T gradually decreasing, with a proportional throttling of A. Further, the main valve element 19 moves leftwards again until being blocked, and then is in a state of P-channel A and B-channel T, and once reversing is finished;

further, the main valve element 19 moves from the rightmost end to the leftmost end once, the state of the whole valve can gradually enter a P-way B throttling state from a P-way B, A-way T state, then enter a full-stop state, then enter a P-way A throttling state, and then enter a P-way A, B-way T state;

further, when the electromagnet 9 is powered on, the lever 8 is pushed away, the push rod 10 is pushed by the lever 8, the sealing ceramic ball 15 is further pushed away, the spring 17 is compressed and stressed, meanwhile, the sealing ceramic ball 15 is separated from the sealing gasket 14, so that oil can flow into the T-shaped port through the square part of the push rod 10, and the pressure relief effect is achieved.

When the electromagnet 9 loses power, the spring 17 pushes the ball seat 16 and the sealing ceramic ball 15, so that the sealing ceramic ball 15 and the sealing gasket 14 are tightly combined, the flow direction of oil passing through the opening B from the outside is cut off, and the effect of sealing the oil is achieved.

Furthermore, when the main valve core and the electromagnet are matched for use, the effect of single-phase cut-off of the port B is caused by on-off of the electromagnet, so that the application scenes of the valve are further enriched;

the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a take self-locking function's high pressure digit proportional reversing valve, includes motor (1), transmission pinion (2), transmission gear wheel (3), screw thread copper sheathing (4), valve barrel (5), valve body (6), back lid (7), lever (8), electro-magnet (9), push rod (10), copper stopper (11), sealed swivel nut (12), tin bronze cover (13), seal gasket (14), sealed ceramic ball (15), ball seat (16), spring (17), gear box (18), main valve core (19), nylon stopper (20), ball rise plug (21), its characterized in that: valve barrel (5) are the cylindric structure of taking the hole, screw thread copper sheathing (4) are the cylindric structure that has the internal thread, in valve body (6) is installed to screw thread copper sheathing (4) and valve barrel (5) interference fit, carry out subsequent hole precision finishing after the installation, the hole one shot forming processing of screw thread copper sheathing (4) and valve barrel (5) and then guarantee the axiality, main valve core (19) are installed in valve barrel (5), rather than direct mount in valve body (6), the cooperation of the runner of all main valve cores (19) all is with valve barrel (5) interact, valve barrel (5) again with the effect that has the runner between valve body (6).

2. The high-pressure digital proportional reversing valve with the self-locking function according to claim 1, characterized in that: the transmission gearwheel (3) and the gear box (18) are respectively provided with a stop block, and the position of the valve core is positioned by using the stopping force generated when the stop blocks collide; the covering cylindrical surface of the main valve core (19) is provided with an oblique angle of 3-5 degrees; each section of the covering surface of the main valve core (19) is provided with 2-3 equalizing grooves, and the equalizing grooves are not evenly distributed on the covering surface, but are slightly far away from the throttling bevel angle.

3. The high-pressure digital proportional reversing valve with the self-locking function according to claim 1, characterized in that: the structure of the stop valve is designed at the lower part of the whole valve body, namely the stop valve can be connected with the A port or the B port of the main valve in series, and adopts the structure of a sealing ceramic ball (15) and a sealing gasket (14), and before installation, the sealing ceramic ball (15) and the sealing gasket (14) need to be prepared.