CN218000494U - Reversing valve with self-locking function and position feedback - Google Patents

Abstract

The utility model provides a take self-locking function and position feedback's switching-over valve, involve the technical field of switching-over valve, including the disk seat subassembly, the inner chamber of disk seat subassembly is equipped with reset spring from a left side to the right side in proper order, case and armature subassembly all are connected with the inner chamber slidable of disk seat subassembly, be equipped with drive assembly on the disk seat subassembly, the external controller of drive assembly, the left side of armature subassembly is equipped with the permanent magnet of adsorbable armature subassembly, the armature subassembly can promote the case motion so that the case switches the runner, drive assembly is used for driving the armature subassembly and is close to the permanent magnet or adsorbs on the permanent magnet, the right side of disk seat subassembly is equipped with the position feedback device who is used for detecting case runner state. The state switching is completed only by short power-on, and the rest states can be kept unchanged at a low level or power-off state, so that the energy consumption is reduced, and the system stability can be improved; the position of the valve core can be detected, so that a user can more conveniently judge the state of the flow channel.

Description

Reversing valve with self-locking function and position feedback

Technical Field

The utility model relates to the technical field of switching-over valve particularly, relates to a take self-locking function and position feedback's switching-over valve.

Background

The reversing valve is a directional control valve with more than two flow forms and more than two oil ports. The valve realizes the communication, cut-off and reversal of hydraulic oil flow, pressure unloading and sequential action control. The valve is controlled by the relative movement direction of the valve core and the valve body. There are two types, a rotary valve type and a slide valve type. The valve core is divided into two positions, three positions and the like according to the number of the working positions of the valve core staying in the valve body; the oil way connected with the valve body is divided into a two-way, a three-way, a four-way, a six-way and the like; the movement modes of the operation valve core are manual, motor, electric, hydraulic, electrohydraulic and the like.

The conventional double-flow-passage reversing valve needs to be electrified to provide electromagnetic force when and after a flow passage is replaced, otherwise, the flow passage is switched back to the original flow passage, so that the flow passage is consumed greatly and the system is not stable enough, and a user cannot judge the position of a valve core when the reversing valve is used, and the state of the flow passage cannot be judged very conveniently.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem consume when changing the runner big and the system is still not stable enough, and the user can't judge the position of case during the use, can't judge the state of runner.

In order to solve the problem, the utility model provides a take self-locking function and position feedback's switching-over valve, including disk seat subassembly, disk seat subassembly's the intracavity from a left side to the right side be equipped with reset spring, case and armature subassembly in proper order, reset spring's both ends respectively with the left side inner wall of disk seat subassembly's inner chamber reaches the case right side is connected, the case reaches armature subassembly all with disk seat subassembly's inner chamber slidable ground is connected, be equipped with on the disk seat subassembly and be used for armature subassembly provides the drive assembly of electromagnetic force, the external controller of drive assembly, the left side of armature subassembly is equipped with adsorbability the permanent magnet of armature subassembly, armature subassembly can promote the case motion is so that the case switches the runner, drive assembly is used for driving armature subassembly and is close to the permanent magnet or adsorb on the permanent magnet, disk seat subassembly's right side is equipped with the position feedback device who is used for detecting case runner state.

In the scheme, when a driving assembly inputs a signal with a positive high level and a negative high level, the permanent magnet is a magnetic object, the permanent magnet can adsorb or repel the armature assembly, when the armature assembly is adsorbed by the permanent magnet, the valve core can move along with the armature assembly so as to change the flow channel mode of the valve core, and when the permanent magnet repels the armature assembly, the armature assembly and the valve core can reset under the action of a reset spring so as to switch the valve core into an initial flow channel mode, so that state switching can be completed by only briefly electrifying, the initial position of the valve core can be kept motionless by the rest states at a low level or power off, and the system stability can be improved while the energy consumption is reduced; the multi-channel synchronous switching is realized, and when a plurality of groups of valves are combined in series and parallel, a system with complex functions and high degree of freedom can be formed; and when the runner is replaced, the direct current consumption is low, the system is stable, and the position of the valve core can be detected, so that a user can judge the state of the runner more conveniently.

Preferably, the armature assembly comprises an armature and a first push rod, the left side of the armature is provided with the first push rod which is used for pushing the valve core to conduct magnetism when the armature is adsorbed by the permanent magnet, and the permanent magnet is provided with a first through hole which is larger than the diameter of the first push rod and smaller than the diameter of the armature and used for the first push rod to penetrate through.

In this scheme, through setting up armature and first push rod can be when armature adsorbs on the permanent magnet, thereby first push rod promotes the valve core and makes the runner state of valve core change.

As a further preference, the valve seat assembly includes a valve housing and a sleeve, the sleeve is disposed on the right side of the valve housing, and the sleeve is connected with the valve housing.

In this scheme, shell and valve barrel fixed connection become whole with the restraint of whole part. The shell is communicated with the inner cavity of the valve sleeve, so that parts can be better and more conveniently installed and placed.

As a further preferred, the position feedback device includes a switch, a switch is disposed on the right side of the armature, the armature assembly further includes a second push rod, the second push rod is disposed on the right side of the armature, and the second push rod is movably connected with the switch to control the switch to be opened or closed.

In this scheme, can survey case position in real time through setting up the switch, feed back the connected state of valve port promptly. When the position of the armature is not changed, the switch is in an open circuit state under the action of the second push rod, when a worker verifies that the switch is in the open circuit state, the valve core is in a first flow channel state, when the armature is adsorbed to the permanent magnet, the switch is in the open circuit state and outputs a high-level signal, and when the worker verifies, the valve core can be determined to be in a second flow channel state.

Preferably, a sealing ring is arranged between the second push rod and the switch, a second through hole is formed in the sealing ring, and the second push rod penetrates through the second through hole.

In this scheme, through setting up the sealing ring, and the sealing ring is placed in telescopic inside to form radial seal through the sealing washer, make sealing performance better.

As a further preference, the right side of the sealing ring is provided with an installation groove, the switch part is inserted in the installation groove, and the second through hole is communicated with the installation groove.

In this scheme, the switch path section is provided with the sealing washer, inserts and forms radial seal in the mounting groove of sealing ring and can make sealing performance better.

Preferably, a third through hole is formed in the right side of the sleeve, the switch part penetrates through the third through hole to be connected with the installation groove, and an elastic membrane is arranged on one side, close to the bottom wall of the installation groove, of the switch.

In this scheme, can completely cut off the effect of impurity and pollutant through setting up elastic diaphragm.

As a further preferred option, the driving assembly includes a coil, an inner iron core and an outer iron core, the outer iron core is disposed outside the inner iron core, and the coil is disposed between the inner iron core and the outer iron core.

In this scheme, can realize the linear proportional control to case displacement and increase case stroke through setting up drive assembly.

Preferably, a casing for wrapping the driving assembly and the switch is arranged on the outer side of the sleeve, the switch and the driving assembly are both arranged in the casing, and a socket connected with the controller is arranged on one side of the casing.

In this scheme, the shell is provided with the switch holding chamber for the axial restraint switch.

Further preferably, sealing rings for sealing are provided between the housing and the sleeve and between the housing and the valve housing, respectively.

In this scheme, through set up the sealing washer in the junction, can be so that the leakproofness is better.

Drawings

FIG. 1 is a schematic cross-sectional view of a reversing valve with self-locking function and position feedback according to the present invention;

fig. 2 is an explosion structure diagram of the reversing valve with self-locking function and position feedback of the present invention.

In the figure: 1. an armature; 2. a seal ring; 3. a switch; 4. an elastic diaphragm; 5. a valve housing; 6. a return spring; 7. a valve core; 8. a sleeve; 9. a second push rod; 10. a first push rod; 11. an outer core; 12. a coil; 13. an inner core; 14. a housing; 15. and a permanent magnet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

The utility model provides a take self-locking function and position feedback's switching-over valve, which comprises, the disk seat subassembly, reset spring 6 is equipped with from a left side to the right side in disk seat subassembly's the inner chamber in proper order, case 7 and armature subassembly, reset spring 6's both ends are connected with disk seat subassembly's inner chamber left side inner wall and case 7's right side respectively, case 7 and armature subassembly all are connected with disk seat subassembly's inner chamber slidable, one side of disk seat subassembly is equipped with the drive assembly who is used for providing the electromagnetic force for the armature subassembly, the external controller of drive assembly, the left side of armature subassembly is provided with permanent magnet 15 that can adsorb the armature subassembly, the armature subassembly can promote case 7 motion so that case 7 switches the runner, the drive assembly is used for driving the armature subassembly and is close to permanent magnet 15 or adsorbs on permanent magnet 15, disk seat subassembly's right side is provided with the position feedback device who is used for detecting case 7 runner state. As shown in fig. 1, the left side of fig. 1 is the left side in the description of the present embodiment, and the right side of fig. 1 is the right side in the description of the present embodiment.

Further, as a better implementation mode, in the scheme, when a driving component inputs a signal with a positive high level and a negative high level, the permanent magnet 15 is a magnetic object, the permanent magnet 15 can adsorb or repel the armature component, when the armature component is adsorbed by the permanent magnet 15, the valve core 7 can move along with the permanent magnet to change the flow channel mode of the valve core 7, and when the permanent magnet 15 repels the armature component, the armature component and the valve core 7 can reset under the action of the reset spring 6 to switch the valve core 7 into an initial flow channel mode, so that state switching can be completed only by short energization, the initial position of the valve core 7 can be kept motionless in other states with low level or power off, energy consumption is reduced, and system stability can be improved; the multi-channel synchronous switching is realized, and when a plurality of groups of valves are combined in series and parallel, a system with complex functions and higher degree of freedom can be formed; and the flow channel is not required to be always electrified when being replaced, so that the consumption is low and the system is stable.

Further, as a preferred embodiment, the valve seat assembly includes a valve sleeve 5 and a sleeve 8, the sleeve 8 is disposed on one side of the valve sleeve 5, a return spring 6 and a valve core 7 are disposed in the valve sleeve 5, an armature assembly and a sealing ring 2 are disposed in the sleeve 8, the sealing ring 2 is disposed on one side of the armature assembly away from the permanent magnet 15, the permanent magnet 15 is disposed between the valve sleeve 5 and the sleeve 8, and the valve sleeve 5 is connected to the sleeve 8. The armature component comprises an armature 1 and a first push rod 10, one side of the armature 1, which is close to the permanent magnet 15, is provided with the first push rod 10, the permanent magnet 15 is provided with a first through hole which is larger than the diameter of the first push rod 10 and smaller than the diameter of the armature 1, the first push rod 10 can penetrate through the first through hole, and the first push rod 10 is in inertial connection with the valve core 7. The first push rod 10 is made of a non-magnetic material, and the first push rod 10 cannot push the valve core 7 under the action of the magnetic field of the permanent magnet 15, so that the flow channel cannot be replaced.

Further, as a preferred embodiment, by providing the armature 1 and the first push rod 10, when the armature 1 approaches the permanent magnet 15, the first push rod 10 pushes the valve core 7 so as to change the flow passage state of the valve core 7. Axial and radial through holes are respectively arranged on the valve core 7 to communicate with cavities at two ends of the valve core 7 and balance hydraulic pressure borne on the end face of the valve core 7. In addition, if necessary, the diameter of the radial through hole can be changed, so that the valve core 7 obtains corresponding viscous damping force during the movement process, and the stability of the valve core 7 is improved. The peripheral side wall of the valve sleeve 5 is provided with a plurality of groups of special-shaped overflowing through holes and a plurality of groups of sealing ring grooves. The special-shaped overflowing through hole is used for realizing the functions of two inlets and four outlets of the valve sleeve 5, and the sealing ring groove is used for placing a sealing ring, so that the sealing performance is better. One end of the valve sleeve 5 is of a completely closed structure and is used for placing a return spring 6; the other end is a through hole structure, and the side surface is provided with an annular groove structure for placing the sleeve 8 and a flange surface structure for placing the sealing ring. The return spring 6 is in a compressed state during operation and tends to push the valve element 7 out of the valve sleeve 5. The armature 1 is made of ferromagnetic material. Four groups of axial through grooves are arranged on the side surface; the inside is provided with a through hole. The side of the first push rod 10 is provided with a flange structure which plays the role of limiting and magnetic isolation. The first push rod 10 is pressed into the armature 1 in an interference mode and forms inertial connection with the valve core 7, and a first through hole axially arranged is formed in the middle of the permanent magnet 15, so that the first push rod 10 can freely penetrate through the permanent magnet 15 and then is connected with the valve core 7 to push the valve core 7. The upper and lower sides of the permanent magnet 15 are provided with flange faces so that the permanent magnet 15 can be fixed between the valve sleeve 5 and the sleeve 8.

Further, as an embodiment of a preferred, the position feedback device includes switch 3, the right side of armature 1 is provided with switch 3, the armature subassembly still includes second push rod 9, second push rod 9 sets up in the right side of armature 1, the mounting groove has been seted up on the right side of sealing ring 2, and switch 3's part is inserted and is located the mounting groove, the second through-hole has been seted up on sealing ring 2, second push rod 9 wears to establish the second through-hole and is used for the state that switch 3 passes through or open circuit with switch 3 swing joint, the second through-hole is linked together with the mounting groove. One side of the switch 3 close to the bottom wall of the mounting groove is provided with an elastic diaphragm 4. One side of the sleeve 8 close to the switch 3 is provided with a third through hole, and the switch 3 partially penetrates through the third through hole to be connected with the mounting groove. The second tappet 9 is pressed into the armature 1 with interference.

Further, as a preferred embodiment, in this scheme, the position of the valve element 7 can be detected in real time by setting the switch 3, that is, the communication state of the valve port is fed back. When the position of the armature 1 is not changed, the switch 3 is in an open circuit state under the action of the second push rod 9, when a worker verifies that the switch 3 is in the open circuit state, the valve core 7 is in a first flow passage state, and when the armature 1 is adsorbed to the permanent magnet 15, the switch 3 is in a closed circuit state and outputs a high level. When the worker checks, it is determined that the spool 7 is in the second flow path state. The effect of impurities and contaminants can be isolated by providing the elastic membrane 4.

Further, as a preferred embodiment, an electromechanical structure that senses the push rod pressure, such as a pressure sensitive resistor or a strain gauge, may be used instead of the switch 3. A sealing ring groove is formed in the side face of the sealing ring 2 and used for placing a sealing ring; one end of the sealing ring is provided with a second through hole, so that the second push rod 9 can freely penetrate through the sealing ring 2; the other end is provided with a mounting groove for placing the switch 3. The sealing ring 2 is placed inside the sleeve 8 and forms a radial seal by means of a sealing ring. The sealing ring 2 is placed inside the sleeve 8 and forms a radial seal by means of a sealing ring. The small diameter section of the switch 3 is provided with a sealing ring, and a radial seal is formed in the mounting groove inserted into the sealing ring 2. Under the action of external force, the built-in push rod of the switch 3 is displaced, the built-in push rod drives the metal elastic sheet to move, and the internal circuit enters an open circuit state; after the external force is removed, the built-in push rod is reset under the action of the built-in spring, and the internal circuit enters a communicated state.

Further, as a preferred embodiment, the driving assembly includes a coil 12, an inner iron core 13 and an outer iron core 11, the outer iron core 11 is disposed outside the inner iron core 13, and the coil 12 is disposed between the inner iron core 13 and the outer iron core 11. The outer side of the sleeve 8 is provided with a shell 14 for wrapping the driving component and the switch 3, the switch 3 and the driving component are both arranged in the shell 14, and one side of the shell 14 is provided with a socket connected with the controller. Sealing rings are provided between the housing 14 and the sleeve 8 and valve housing 5, respectively.

Further, as a preferred implementation mode, in the scheme, linear proportional control on displacement of the valve element 7 can be realized and the stroke of the valve element 7 is increased by arranging the driving assembly. The housing 14 is provided with a switch 3 housing cavity for axially constraining the switch 3. The housing 14 and the valve housing 5 are fixedly connected to hold the whole components together. By arranging the sealing ring at the joint, the sealing performance can be better.

Further, as a preferred embodiment, the inner iron core 13 is provided with a V-shaped notch, so that linear proportional control of the displacement of the valve core 7 can be realized and the stroke of the valve core 7 can be increased. The inner core 13 and the outer core 11 enclose the coil 12 therein, forming a complete magnetic circuit. The shell 14 is made of plastic and used for fixing the inner iron core 13 and the outer iron core 11, and is provided with a plug which can be externally connected with a controller. The housing 14 is provided with a switch 3 housing cavity for axially constraining the switch 3. The housing 14 and the valve housing 5 are fixedly connected to hold the whole components together. Where two pins are required for the coil 12 and two pins are required for the switch 3. The proportional electromagnet is modified to be a large-stroke switch 3 electromagnet in consideration of hysteresis effect, and needs to be supplied with forward and reverse currents, so that a pin does not need to distinguish polarities.

Further, as a preferred embodiment, a method for using a reversing valve with self-locking function and position feedback comprises the following steps:

s1, when a signal input by the controller from the socket is in a low level, the armature 1 is not subjected to electromagnetic force or is subjected to small stress, cannot overcome the pretightening force of the return spring 6 and is kept still. The built-in push rod of the switch 3 is separated from the inner metal elastic sheet under the action of the second push rod 9, the switch 3 is in a broken circuit state, and the switch 3 outputs a low level signal to indicate that the valve core 7 is in a state in the first flowing direction.

And S2, when the signal input from the socket of the controller is in a positive high level, the armature 1 is subjected to a larger electromagnetic force, and the direction of the electromagnetic force points to the permanent magnet 15. In addition, the adjacent end faces of the permanent magnet 15 and the armature 1 are in a different magnetic pole state, and the armature 1 is also under the action of the magnetic field of the permanent magnet 15 and points to the permanent magnet 15. When the armature 1 is far from the permanent magnet 15, the electromagnetic force is much larger than the magnetic force of the permanent magnet 15, and when the armature 1 is near to the permanent magnet 15, the electromagnetic force is much smaller than the magnetic force of the permanent magnet 15. Therefore, the armature 1 will first move in the direction of the permanent magnet 15 against the resistance of the return spring 6 under the action of the electromagnetic force. When the armature 1 enters the field range of the permanent magnet 15, it will approach quickly. However, due to the presence of the first tappet 10, a gap remains between the armature 1 and the permanent magnet 15. The valve element 7 moves with the movement of the armature 1, and is switched to the second flow state. Since the magnetic force of the permanent magnet 15 on the armature 1 is independent of the current, the input signal can be switched to a low level state, i.e. a locking function is realized. Along with the movement of the armature 1, the second push rod 9 does not apply acting force to the built-in push rod of the switch 3 any more, and the metal elastic sheet is reset. The internal circuit is in a connected state, and the switch 3 outputs a high level signal indicating that the spool 7 is in the second flow direction.

And S3, when the valve core 7 is in a second circulation state and a signal input by the controller from the plug socket is in a reverse high level, the electromagnetic force borne by the armature 1 points to the permanent magnet 15. The adjacent end faces of the permanent magnet 15 and the armature 1 are in the same magnetic pole state, and the magnetic force applied to the armature 1 by the permanent magnet 15 drives the armature 1 to be far away from the permanent magnet 15. The magnetic force of the return spring 6 and the permanent magnet 15 together overcome the electromagnetic force, driving the armature 1 away from the permanent magnet 15. When the armature 1 is separated from the magnetic field of the permanent magnet 15, the input signal is switched to a low level signal or is cut off, the armature 1 is completely reset under the action of the reset spring 6, the valve core 7 is switched to a first flow direction state, the switch 3 is in a cut-off state under the action of the second push rod 9, and a low level signal is output.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (9)

1. The reversing valve with the self-locking function and the position feedback is characterized by comprising a valve seat assembly, wherein a reset spring (6), a valve core (7) and an armature assembly are sequentially arranged in an inner cavity of the valve seat assembly from left to right, two ends of the reset spring (6) are respectively connected with the inner wall of the left side of the inner cavity of the valve seat assembly and the right side of the valve core (7), the valve core (7) and the armature assembly are slidably connected with the inner cavity of the valve seat assembly, a driving assembly used for providing electromagnetic force for the armature assembly is arranged on the valve seat assembly, the driving assembly is externally connected with a controller, a permanent magnet (15) capable of adsorbing the armature assembly is arranged on the left side of the armature assembly, the armature assembly can push the valve core (7) to move so that the valve core (7) can switch a flow channel, the driving assembly is used for driving the armature assembly to be close to the permanent magnet (15) or adsorbed on the permanent magnet (15), and a position feedback device used for detecting the flow channel state of the valve core (7) is arranged on the right side of the valve seat assembly.

2. The reversing valve with the self-locking function and the position feedback as claimed in claim 1, wherein: the armature component comprises an armature (1) and a first push rod (10), the left side of the armature (1) is provided with the first push rod (10) which is used for pushing the non-magnetic conduction of the valve core (7) when the armature (1) is adsorbed by the permanent magnet (15), and the permanent magnet (15) is provided with a first through hole which is larger than the diameter of the first push rod (10) and smaller than the diameter of the armature (1) and is used for the first push rod (10) to penetrate through.

3. The reversing valve with self-locking function and position feedback as claimed in claim 2, characterized in that: the valve seat assembly comprises a valve sleeve (5) and a sleeve (8), the sleeve (8) is arranged on the right side of the valve sleeve (5), and the sleeve (8) is connected with the valve sleeve (5).

4. The reversing valve with the self-locking function and the position feedback as claimed in claim 3, wherein: the position feedback device comprises a switch (3), the switch (3) is arranged on the right side of the armature (1), the armature assembly further comprises a second push rod (9), the second push rod (9) is arranged on the right side of the armature (1), and the second push rod (9) is movably connected with the switch (3) and used for controlling the switch (3) to be opened or closed.

5. The reversing valve with the self-locking function and the position feedback as claimed in claim 4, wherein: and a sealing ring (2) is arranged between the second push rod (9) and the switch (3), a second through hole is formed in the sealing ring (2), and the second push rod (9) penetrates through the second through hole.

6. The reversing valve with self-locking function and position feedback according to claim 5, characterized in that: an installation groove is formed in the right side of the sealing ring (2), the switch (3) is partially inserted into the installation groove, and the second through hole is communicated with the installation groove.

7. The reversing valve with the self-locking function and the position feedback as claimed in claim 6, wherein: a third through hole is formed in the right side of the sleeve (8), and the switch (3) partially penetrates through the third through hole to be connected with the mounting groove.

8. The reversing valve with self-locking function and position feedback as claimed in claim 7, characterized in that: drive assembly includes coil (12), interior iron core (13) and outer iron core (11), the outside of interior iron core (13) is equipped with outer iron core (11), interior iron core (13) with be equipped with between outer iron core (11) coil (12).

9. The reversing valve with self-locking function and position feedback according to claim 8, characterized in that: the outer side of the sleeve (8) is provided with a shell (14) used for wrapping the driving component and the switch (3), the switch (3) and the driving component are arranged in the shell (14), and one side of the shell (14) is provided with a socket connected with the controller.

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