CN116085515A - Control system of multi-way reversing valve - Google Patents

Abstract

The invention relates to the technical field of flow control equipment, in particular to a multi-way reversing valve control system which comprises a control unit, a plurality of mutually independent reversing valve units and a transformer, wherein the control unit is respectively connected with the reversing valve units, the reversing valve units comprise reversing valve main bodies and relays, one ends of the relays are connected with the control unit, the other ends of the relays are connected with the reversing valve main bodies, one ends of the transformers are connected with a power supply, and the other ends of the transformers are respectively connected with the relays in the reversing valve units.

Description

Multi-way reversing valve control system

technical field

The invention relates to the technical field of flow control equipment, in particular to a multi-way reversing valve control system.

Background technique

The multi-way reversing valve is a combination valve composed of more than two reversing valves. A typical reversing valve includes an electromagnetic reversing valve and a hydraulic pilot reversing valve. The electromagnetic reversing valve includes an electromagnetic pilot valve part and a main valve part. The electromagnetic pilot valve in the electromagnetic reversing valve in the related art uses an electromagnet to convert an electrical signal into a mechanical displacement to drive the pilot valve core to open. However, the structure of the electromagnet is relatively complex, the volume is large, and due to the limitation of power consumption, the thrust generated is small, which may easily lead to insufficient thrust of the pressure rod and cause liquid leakage.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the embodiment of the present invention proposes a multi-way reversing valve control system, which can improve the flow control accuracy of the fluid multi-way reversing valve control system.

The multi-way reversing valve control system of the embodiment of the present invention includes: a control unit; a plurality of mutually independent reversing valve units, the control units are respectively connected to a plurality of the reversing valve units, and a plurality of the reversing valve units are connected to each other. The valve units each include a reversing valve body and a relay, one end of the relay is connected to the control unit, and the other end of the relay is connected to the reversing valve body; a transformer, one end of the transformer is suitable for being connected to a power supply , the other end of the transformer is respectively connected to the relays in the plurality of reversing valve units.

The multi-way directional valve control system of the embodiment of the present invention can improve the flow control accuracy of the fluid multi-way directional valve control system.

In some embodiments, the reversing valve body includes a pilot valve assembly and a reversing valve assembly, the pilot valve assembly is connected to the reversing valve assembly, and the pilot valve assembly includes a pilot valve body and a pilot spool assembly , the pilot spool assembly is set in the pilot valve body, the pilot spool assembly includes a valve seat and a pressure rod, the pressure rod is installed in the valve seat, and the pressure rod is in the valve The length direction of the seat can be moved; the piezoelectric actuator, the piezoelectric actuator includes a driving part, the driving part is connected with the end of the pressure rod away from the valve seat, and the driving part can drive the The pressure rod moves in the length direction of the valve seat.

In some embodiments, the piezoelectric actuator further includes a housing, a piezoelectric ceramic sheet and a cable, the housing has a cavity, the piezoelectric ceramic sheet is arranged in the cavity, and the wire One end of the cable passes through the casing and is connected to one end of the piezoelectric ceramic sheet, and the other end of the piezoelectric ceramic sheet is connected to the driving component.

In some embodiments, the piezoelectric actuator further includes a first elastic member, the first elastic member is arranged in the chamber, the first elastic member is sleeved on the driving part, and the One end of the first elastic member is in contact with a side of the driving component away from the piezoelectric ceramic sheet, and the other end of the first elastic member is in contact with the inner wall of the housing.

In some embodiments, the piezoelectric actuator further includes a swing rod, one end of the swing rod is pivotally connected to the housing, the other end of the swing rod can swing, and the swing rod is connected to the Drive components abut.

In some embodiments, the piezoelectric actuator further includes an adjustment assembly, and the adjustment assembly is used to adjust the depth at which the end of the swing rod away from the casing protrudes into the pilot valve body.

In some embodiments, the driving component includes a detachably connected driving block and a driving rod, the adjustment assembly is arranged in the housing, and the adjustment assembly includes a connecting sleeve, and the connecting sleeve is passed through the In the driving block, the driving rod extends into the connecting sleeve, and the depth of the driving rod extending into the connecting sleeve is adjustable.

In some embodiments, the driving component includes a driving block and a driving rod integrally formed, the adjusting assembly is arranged outside the housing, the adjusting assembly is connected to the swing rod, and the adjusting assembly is connected to the The end of the swing rod away from the housing is connected, the adjustment assembly includes an adjustment rod, the adjustment rod is passed through the swing rod, and the adjustment rod is movable in the length direction of the housing, so One end of the regulating rod is adapted to extend into the pilot valve body and be connected with the pressing rod.

In some embodiments, the main body of the reversing valve further includes a connecting sleeve and a lock nut, the piezoelectric actuator is passed through the connecting sleeve, and one end of the connecting sleeve extends into the In the pilot valve body, the nut is sleeved on the connecting sleeve.

In some embodiments, the pilot valve core assembly further includes a spring seat and a second elastic member, the spring seat is arranged in the valve seat, one end of the spring seat abuts against the pressure rod, the The other end of the spring seat abuts against the second elastic member, the reversing valve assembly includes a reversing valve body and a reversing valve core assembly, the reversing valve core assembly is arranged in the reversing valve body, and The reversing valve body communicates with the pilot valve body.

Description of drawings

Fig. 1 is a schematic structural diagram of a multi-way reversing valve control system according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the reversing valve body of the embodiment of the present invention.

Fig. 3 is a cross-sectional view of the reversing valve body of the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a piezoelectric actuator according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a piezoelectric actuator according to another embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a piezoelectric actuator according to another embodiment of the present invention.

Reference signs:

Control unit 1000, reversing valve unit 2000, reversing valve main body 2001,

Piezoelectric actuator 100, pilot valve assembly 200, pilot valve body 210, pilot spool assembly 220, reversing valve assembly 300, reversing valve body 310, reversing valve core group 320, terminal 400, connecting plate 500,

Valve seat 1, pressure rod 2, driving part 3, driving block 31, driving rod 32, housing 4, chamber 41, piezoelectric ceramic sheet 5, cable 6, first elastic member 7, swing rod 8, first Through hole 81, second through hole 9, adjustment assembly 10, connecting sleeve 101, adjusting rod 102, connecting sleeve 11, lock nut 12, protective cover 13, spring seat 14, second elastic member 15, mounting seat 16 , a rotating shaft 17, a relay 18, a transformer 19, a host computer 20, a first controller 21, and a second controller 22.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

As shown in Figure 1, the multi-way reversing valve control system of the embodiment of the present invention includes a control unit 1000, a plurality of mutually independent reversing valve units 2000 and a transformer 19, and the control unit 1000 is connected to a plurality of reversing valve units 2000 respectively. A plurality of reversing valve units 2000 each include a reversing valve body 2001 and a relay 18, one end of the relay 18 is connected to the control unit 1000, the other end of the relay 18 is connected to the reversing valve body 2001, and one end of the transformer 19 is connected to the power supply , the other end of the transformer 19 is connected to the relays 18 in the plurality of reversing valve units 2000 respectively.

Specifically, as shown in FIG. 1 , the control unit 1000 includes a host computer 20, a first controller 21 and a second controller 22, and the signal input terminals of the first controller 21 and the second controller 22 are connected with the host computer 20 respectively. , the signal output terminals of the first controller 21 and the second controller 22 are respectively connected with the relay 18 .

For example, the first controller 21 is an ordinary switch controller, and the first controller 21 is used to receive commands from the host computer 20 and output switch signals to control the relay 18 . When the upper computer 20 issues an "on" command, the first controller 21 outputs the excitation amount to turn on the relay 18; when the upper computer 20 issues an "off" command, the first controller 21 stops outputting the excitation amount to turn off the relay 18.

The second controller 22 is a PWM switch controller that receives commands from the host computer 20 and outputs pulse width modulation signals to control the relay 18 . The pulse width modulation range is 0-100%, and the pulse frequency is 0-10000Hz.

When the change of the excitation quantity of the relay 18 meets the specified requirements, the high voltage inlet and outlet are turned on; otherwise, they are turned off. The voltage of the high voltage terminal of the relay 18 is 0-1000V, and the current is 0-40A; the voltage of the excitation terminal of the relay 18 is 0-48V, and the current is 0-2A.

It should be noted that the output ends of PWM-type switch controllers and ordinary switch controllers usually have N channels, and each channel controls a group of relays 18 and piezoelectric actuators. N is an arbitrary constant. That is, the output quantities of the two controllers can be combined arbitrarily.

The transformer 19 is used to transform the low-voltage direct current input by the power supply into high-voltage electricity that meets the requirements of the piezoelectric actuator. The voltage requirement of the piezoelectric actuator is generally 0-1000V, and the voltage that can be provided by the working environment is generally 0-220V.

The multi-way valve reversing control system of the embodiment of the present invention controls the opening and closing of the reversing valve main body 2001 by setting the first controller 21 and the second controller 22 to simultaneously or separately control the opening and closing of the relay 18, thereby improving fluid flow. The flow control accuracy of the multi-way reversing valve control system.

As shown in FIGS. 2 to 6 , the reversing valve body 2001 includes a pilot valve assembly 200 , a reversing valve assembly 300 and a piezoelectric actuator 100 . The pilot valve assembly 200 is connected with the reversing valve assembly 300. The pilot valve assembly 200 includes a pilot valve body 210 and a pilot valve core assembly 220. The pilot valve core assembly 220 is arranged in the pilot valve body 210. The pilot valve core assembly 220 includes a valve seat 1 And the pressure rod 2, the pressure rod 2 is installed in the valve seat 1, and the pressure rod 2 can move in the length direction of the valve seat 1 (the left and right directions as shown in Figure 3). The piezoelectric actuator 100 includes a driving part 3 connected to an end of the pressure rod 2 away from the valve seat 1 , and the driving part 3 can drive the pressure rod 2 to move along the length direction of the valve seat 1 .

Specifically, the lower end of the pilot valve assembly 200 is connected to the upper end of the reversing valve assembly 300, the left end of the piezoelectric actuator 100 is connected to the right end of the pilot valve assembly 200, the pilot valve assembly 200 is arranged in the pilot valve body 210, and the pilot valve The right end of the body 210 is connected with the left end of the piezoelectric actuator 100, the pressure rod 2 is installed in the valve seat 1, the left end of the driving part 3 is connected with the right end of the pressure rod 2, and the left and right movement of the driving part 3 drives the pressure rod 2 in the Movement in left and right directions.

When a potential difference is applied to the piezoelectric actuator 100, the driving part 3 is displaced under the action of the potential difference to generate thrust, and the left and right movement of the pressing rod 2 is driven by the connection between the driving part 3 and the pressure rod 2 to push the pilot valve spool to move. Further promote the movement of the reversing valve assembly 300, and the expansion and contraction of the driving part 3 of the piezoelectric actuator 100 has a certain proportional relationship with the control voltage, and the displacement of the spool can be precisely controlled by controlling the magnitude of the potential difference, that is, The flow rate and pressure of the valve port of the multi-way directional valve control system are adjusted, thereby improving the flow control accuracy of the multi-way directional valve control system.

Because the thrust generated by the movement of the electromagnet-driven spool is 5-40N, and the thrust required for the pilot spool assembly 220 to open during work is usually 40-80N, a lever is arranged between the electromagnet and the pilot spool in the related art The components amplify the thrust. The piezoelectric actuator 100 of the embodiment of the present invention can generate a thrust of 50-100000N, which is far greater than the thrust required for the action of the pilot valve core assembly 220. The driving part 3 of the embodiment of the present invention is directly connected with the pressure The rods 2 are connected, which reduces the overall size of the pilot valve assembly 200 and also reduces the manufacturing cost of the pilot valve assembly 200, thereby reducing the overall size and manufacturing cost of the multi-way reversing valve control system.

The multi-way reversing valve control system of the embodiment of the present invention controls the movement of the pressure rod 2 in the pilot valve core assembly 220 through the piezoelectric actuator 100, and the pilot valve assembly 200 is connected with the reversing valve assembly 300 to drive the reversing valve assembly 300 movement, and the piezoelectric actuator 100 has faster response speed, greater output force and lower power consumption than the control methods such as electromagnets in the related art. 2 Displacement control to improve the control precision of the pilot valve assembly 200, thereby improving the flow control precision of the multi-way reversing valve control system.

It should be noted that the main liquid inlet on the valve body of the reversing valve assembly 300 communicates with the liquid inlet passage; the passage runs through the valve body, and the two ends are sealed with screw plugs. The liquid inlet chamber of the pipe is connected, and both ends are sealed; at the same time, another channel communicates with the liquid inlet chamber of the pilot valve assembly 200 through a precision filter through a cartridge type liquid inlet check valve. The channel runs through the valve body and is sealed at both ends; in addition, the main liquid return port on the valve body communicates with the liquid return channel; The liquid return port of the electromagnetic pilot valve communicates with the main liquid return port through the cartridge type return liquid check valve.

The pilot valve assembly 200 also includes a screw sleeve, a pressure sleeve, a guide sleeve, a first magnetic ball, a push rod and a second magnetic ball arranged in the valve seat 1, the pressure sleeve is arranged between the valve seat 1 and the guide sleeve, and the pressure sleeve There is a first pressure rod 2 hole combination inside, a second pressure rod 2 holes are provided in the guide sleeve, the second magnetic ball is set in the first pressure rod 2 hole combination, and the pressure rod 2 passes through the first pressure rod 2 holes in turn After the combination and the second pressure rod 2 holes, the screw fine-tuning combination is connected with the lever assembly. The structure of the cooperation of the guide sleeve, the pressure sleeve and the pressure rod 2 is simple, reducing high-pressure leakage points, fewer failure points, and improving service life.

Optionally, the first compression rod 2 hole combination includes a large hole in the compression sleeve and a small hole in the compression sleeve, the compression rod 2 is provided with a head of the compression rod 2 and a rod portion of the compression rod 2, and the head of the compression rod 2 is in the large hole of the compression sleeve The action is used to control the conduction and closing of the second magnetic ball. The rod part of the pressure rod 2 passes through the small hole of the pressure sleeve and the hole of the second pressure rod 2. This structure is stable and reliable in action. There is a sealing ring installation groove on the guide sleeve, and an O-ring is arranged in the sealing ring installation groove. The O-ring does not bear high-pressure fluid, which reduces the hidden danger of leakage and has a good sealing effect.

In some embodiments, the piezoelectric actuator 100 further includes a housing 4, a piezoelectric ceramic sheet 5, and a cable 6. The housing 4 has a chamber 41, the piezoelectric ceramic sheet 5 is arranged in the chamber 41, and the wire One end of the cable 6 passes through the housing 4 and is connected to one end of the piezoelectric ceramic sheet 5 , and the other end of the piezoelectric ceramic sheet 5 is connected to the driving component 3 .

Specifically, the driving part 3 is arranged in the housing 4 , the right end of the driving part 3 is connected with the piezoelectric ceramic sheet 5 , and the left end of the driving part 3 can protrude out of the housing 4 and be connected with the pressure rod 2 .

Optionally, when the lower end of the cable 6 passes through the housing 4 and applies a potential difference to both ends of the piezoelectric ceramic sheet 5, the piezoelectric ceramic sheet 5 extends axially, and the driving part 3 acts on the axial extension of the piezoelectric ceramic sheet 5. Moving to the left, the left end of the driving part 3 is connected with the right end of the pressure rod 2 to push the pressure rod 2 to move to the left.

In some embodiments, the piezoelectric actuator 100 further includes a first elastic member 7, the first elastic member 7 is disposed in the cavity 41, the first elastic member 7 is sleeved on the driving part 3, and the first elastic member 7 One end of the first elastic member 7 is in contact with the side of the driving component 3 away from the piezoelectric ceramic sheet 5 , and the other end of the first elastic member 7 is in contact with the inner wall of the housing 4 .

Specifically, the first elastic member 7 is arranged at the left end of the chamber 41, the first elastic member 7 is sleeved on the driving part 3, and the left end of the first elastic member 7 abuts against the inner wall of the housing 4, and the first elastic member 7 The right end of the part 7 is in contact with the right end of the driving part 3, and the setting of the first elastic part 7 makes the driving part 3 closely connected with the piezoelectric ceramic sheet 5, so as to ensure that the axially extending displacement of the piezoelectric ceramic sheet 5 can be effectively transmitted to the driving part 3 , so that the driving part 3 drives the pressure rod 2 to move, thereby reducing the energy consumption of the piezoelectric actuator 100 .

In some embodiments, the piezoelectric actuator 100 further includes a swing rod 8 , one end of the swing rod 8 is pivotally connected to the housing 4 , the other end of the swing rod 8 is swingable, and the swing rod 8 abuts against the driving component 3 .

As shown in FIG. 4 , the left end of the driving part 3 abuts against the middle part of the right side of the swing link 8 , the upper end of the swing link 8 is pivotally connected to the housing 4 , and the lower end of the swing link 8 can rotate around the pivot point.

Optionally, the piezoelectric actuator 100 also includes a mounting base 16 and a rotating shaft 17, the right end of the mounting base 16 is connected to the left end of the housing 4, the upper end of the swing rod 8 is provided with a first through hole 81, and the rotating shaft 17 The lower end passes through the mounting base 16 and the first through hole 81 in order to fix the upper end of the swing rod 8 on the mounting base 16, so as to realize the pivot connection between the swing rod 8 and the mounting base 16, that is, the swing rod 8 can rotate around the rotating shaft.

For example, a threaded connection can be used between the mounting base 16 and the housing 4, and the present invention does not limit the specific connection method between the mounting base 16 and the housing 4, as long as the rigid connection between the mounting base 16 and the housing 4 can be realized All belong to the protection scope of the present invention.

The embodiment of the present invention adjusts the distance between the abutment point of the drive part 3 and the swing rod 8 and the pivot point of the swing rod 8, that is, by adjusting the distance between the end of the swing rod 8 away from the pivot point and the pivot point and the driving part. 3 and the proportional value of the distance between the abutment point of the swing rod 8 and the pivot point of the swing rod 8 can adjust the displacement magnification of the swing rod 8 .

When a potential difference is applied to the piezoelectric actuator 100, the piezoelectric ceramic sheet 5 extends axially, and the driving part 3 moves to the left under the axial extension of the piezoelectric ceramic sheet 5, and the left end of the driving part 3 and the swing rod 8 The middle part of the right side abuts and pushes the fork 8 to move to the left, and the movement of the fork 8 to the left will drive the fork 8 to rotate leftward around the rotating shaft 17. Large displacement means that the middle part of the swing rod 8 is pushed to rotate leftward by the driving part 3 , so that the lower end of the swing rod 8 can produce a larger displacement and increase the stroke of the piezoelectric actuator 100 .

It should be noted that the displacement that can be generated by a single piezoelectric ceramic sheet 5 is very small. In order to increase the displacement generated by the piezoelectric actuator 100 in the related art, dozens to hundreds of piezoelectric ceramic sheets 5 need to be stacked. used to increase the displacement of the piezoelectric actuator 100, but the stacking of multiple piezoelectric ceramic sheets 5 will increase the size and volume of the piezoelectric actuator 100, the embodiment of the present invention adopts a smaller number of piezoelectric ceramic sheets The stacking of 5 drives the driving part 3 to move to the left, and then the driving part 3 drives the middle part of the swing rod 8 to shift to the left. It can be known from the principle of leverage that the driving part 3 moves downward under the force of the axial extension of the piezoelectric ceramic sheet 5. The displacement to the left is smaller than the displacement to the left of the lower part of the swing rod 8, that is, a larger displacement is generated by using a smaller number of piezoelectric ceramic sheets 5 stacked, which improves the performance of the piezoelectric actuator 100. stroke, and the use of a smaller number of piezoelectric ceramic sheets 5 can reduce the size and volume of the piezoelectric actuator 100, thereby reducing the cost and consumption of the multi-way reversing valve control system.

In some embodiments, the piezoelectric actuator 100 further includes an adjustment assembly 10 for adjusting the depth of the end of the swing rod 8 away from the housing 4 protruding into the pilot valve body 210 .

As shown in Figure 5, the distance between the lower end of the swing rod 8 and the housing 4 is adjusted by adjusting the assembly 10, and then the depth at which the lower end of the swing rod 8 extends into the pilot valve body 210 is adjusted to realize the adjustment of the swing rod 8. Adjust the initial installation position.

It should be noted that since the axial extension distance of the piezoelectric ceramic sheet 5 is at the micron level, the displacement adjustment of the piezoelectric actuator 100 is at the micron level, generally 0-500 μm, while the moving distance of the pilot valve core is at the millimeter level , generally 0.1-50mm, when the piezoelectric actuator 100 is in use, if the initial installation position of the piezoelectric actuator 100 deviates, it will exceed the working range of the piezoelectric actuator 100, resulting in piezoelectric actuator The adjustment of the piezoelectric actuator 100 fails, and the piezoelectric actuator 100 needs to be frequently disassembled to adjust the installation position of the piezoelectric actuator 100. High, the embodiment of the present invention adjusts the distance of the pendulum 8 extending into the pilot valve body 210 by setting the adjustment assembly 10, which reduces the accuracy requirements of the piezoelectric actuator 100 for the installation position, and realizes the adjustment of the piezoelectric actuator 100. The adjustment of the initial installation position improves the installation efficiency of the piezoelectric actuator 100.

Optionally, there is a certain gap between the various parts on the transmission path between the driving part 3 of the piezoelectric actuator 100 and the pressure rod 2, when the total length of the gap exceeds the working range of the piezoelectric actuator 100, or , the effective total length of each part on the transmission path is greater than the required length between the piezoelectric actuator 100 and the pressure rod 2, so that when the pressure rod 2 cannot be sealed with the valve seat 1 at the initial position, it is necessary to actuate the piezoelectric actuator The initial installation position of the actuator 100 is adjusted. In the related art, the piezoelectric actuator 100 needs to be removed as a whole and then the installation position is adjusted, resulting in frequent installation of the piezoelectric actuator 100 and difficulty in ensuring the accuracy of each adjustment of the installation position. The implementation of the present invention For example, by setting the adjustment assembly 10 on the piezoelectric actuator 100, the distance of the pendulum 8 extending into the valve seat 1 is adjusted through the adjustment assembly 10, so as to ensure that the pressure rod 2 and the valve seat 1 are in a sealed state at the initial position, and The gap is located within the working range of the piezoelectric actuator 100 , so that the displacement generated by the piezoelectric actuator 100 can effectively drive the compression rod 2 to move.

In some embodiments, the driving part 3 includes a detachably connected driving block 31 and a driving rod 32, the adjusting assembly 10 is arranged in the housing 4, and the adjusting assembly 10 includes a connecting sleeve 101, which is passed through the driving In the block 31, the driving rod 32 extends into the connecting sleeve 101, and the depth of the driving rod 32 extending into the connecting sleeve 101 is adjustable.

Specifically, the connecting sleeve 101 is penetrated in the driving block 31, and the right end of the driving rod 32 extends into the connecting sleeve 101 and is detachably connected with the driving block 31 to adjust the depth of the right end of the driving rod 32 extending into the driving block 31. Adjust, the right end of driving block 31 is connected with piezoelectric ceramic sheet 5, the left end of driving rod 32 abuts against the middle part of the right side of fork 8, the upper end of fork 8 is pivotally connected with mounting seat 16, and the lower end of fork 8 can be wound around The pivot point rotates, and the adjustment of the initial installation position of the piezoelectric actuator 100 is realized by adjusting the depth at which the right end of the drive rod 32 extends into the connecting sleeve 101 to adjust the length at which the left end of the swing rod 8 extends into the pilot valve body 210 , to improve the installation efficiency of the piezoelectric actuator 100 .

Optionally, the piezoelectric ceramic sheet 5 has a ring structure, the central axis of the piezoelectric ceramic sheet 5 is provided with a second through hole 9, the connecting sleeve 101 is passed through the driving block 31, and the left end of the adjustment tool can be inserted into the second through hole 9. The two through holes 9 are inserted into the connecting sleeve 101 to adjust the distance that the right end of the driving rod 32 extends into the connecting sleeve 101, and then adjust the length of the lower end of the swing rod 8 extending into the pilot valve body 210, so as to realize the adjustment of the piezoelectric actuator. The adjustment of the initial installation position of the piezoelectric actuator 100 improves the installation efficiency of the piezoelectric actuator 100 .

In the embodiment of the present invention, a second through hole 9 is provided on the piezoelectric actuator 100, and a connection sleeve 101 is provided on the drive block 31. The adjustment tool is inserted into the connection sleeve 101 through the second through hole 9 to adjust the driving rod. The right end of 32 extends into the depth of the drive block 31 to adjust, and then adjusts the distance of the pendulum 8 into the pilot valve body 210, after realizing the adjustment of the initial installation position of the piezoelectric actuator 100, the piezoelectric ceramic A potential difference is applied to both ends of the sheet 5, the piezoelectric ceramic sheet 5 extends axially, the driving block 31 moves leftward under the action of the axial extension of the piezoelectric ceramic sheet 5, and the leftward movement of the driving block 31 drives the driving rod 32 to move leftward, And then promote fork 8 to move to the left, realize the leftward movement of depression bar 2.

For example, the drive rod 32 and the drive block 31 are threadedly connected, and accordingly the connection position of the drive rod 32 and the connecting sleeve 101 is set as an adjustment structure with internal and external threads. The structure of the threaded connection is finer and the adjustment accuracy is higher. , and the adjustment is quick and easy.

For example, the second through hole 9 is an inner hexagonal hole, and the adjustment tool is an inner hexagonal screwdriver or an inner hexagonal wrench matched with the inner hexagonal hole, that is, the left end of the hexagonal screwdriver is inserted into the connecting sleeve 101 through the second through hole 9, and the hexagonal The screwdriver adjusts the position of the drive shaft to achieve precise adjustment of the depth at which the drive rod 32 extends into the connecting sleeve 101. It can be understood that the shape of the second through hole 9 and the adjustment tool can be set to other shapes, such as inner four corners Holes, straight grooves, cross grooves, outer hexagonal bosses, outer four-corner bosses, the embodiment of the present invention does not limit the shape of the second through hole 9 and the type of adjustment tool, as long as it is a matching structure of rotational torque to adjust the drive rod The distance that the right end of 32 extends into the connecting sleeve 101 all belongs to the protection scope of the present invention.

In some embodiments, the driving part 3 includes a driving block 31 and a driving rod 32 integrally formed, the adjusting assembly 10 is arranged outside the housing 4, the adjusting assembly 10 is connected with the swing rod 8, and the adjusting assembly 10 and the swing rod 8 are away from the housing One end of the body 4 is connected, the adjustment assembly 10 includes an adjustment rod 102, the adjustment rod 102 is passed through the swing rod 8, and the adjustment rod 102 is movable in the length direction of the housing 4, and one end of the adjustment rod 102 is suitable for extending into the pilot Inside the valve body 210 and connected with the pressure rod 2 .

Specifically, as shown in Figure 6, the adjustment assembly 10 is arranged outside the housing 4, the adjustment assembly 10 is connected with the lower end of the swing rod 8, the left end of the adjustment rod 102 extends into the pilot valve body 210 and is connected with the pressure rod 2, the adjustment rod The right end of 102 extends into the lower end of the swing rod 8. By adjusting the depth of the adjustment rod 102 extending into the swing rod 8, the length of the adjustment rod 102 extending into the valve seat 1 is adjusted to realize the initial installation of the piezoelectric actuator 100. The adjustment of the position improves the installation efficiency of the piezoelectric actuator 100 .

Optionally, the adjustment assembly 10 is arranged outside the housing 4 to facilitate the adjustment of the angle between the swing rod 8 and the drive rod 32, that is, to adjust the depth at which the adjustment rod 102 extends into the swing rod 8, and to adjust the adjustment rod 102 in the swing rod 8 When wearing and tearing occurs, it is convenient to replace the fork 8.

For example, when the adjustment rod 102 and the swing rod 8 are connected by threads, the depth of the adjustment rod 102 extending into the swing rod 8 can be adjusted only by clamping the spanner to the adjustment rod 102 to rotate.

It can be understood that the piezoelectric actuator 100 of the embodiment of the present invention may include the adjustment assembly 10 and the swing rod 8 at the same time, or may only include the swing rod 8, or may only include the adjustment assembly 10, and the position of the adjustment assembly 10 may be The piezoelectric actuator 100 can be installed inside the housing 4 or outside the housing 4. The specific configuration of the piezoelectric actuator 100 is subject to actual needs.

In some embodiments, the reversing valve body 2001 further includes a connecting sleeve 11 and a lock nut 12 , the piezoelectric actuator 100 is installed in the connecting sleeve 11 , and one end of the connecting sleeve 11 extends into the pilot valve body 210 Inside, the nut is sleeved on the connecting sleeve 11 .

Specifically, the connecting sleeve 11 is arranged at the right end of the pilot valve, and the left end part of the connecting sleeve 11 extends into the pilot valve body 210 to fix the position of the connecting sleeve 11. By setting the lock nut 12 on the connecting sleeve 11 to connect the piezoelectric actuator 100 and the pilot valve body 210 .

Optionally, the pilot valve further includes a connecting plate 500, the left end of the connecting plate 500 is connected with the pilot valve body 210, and the right end of the connecting plate 500 is connected with the piezoelectric actuator 100, that is, when the piezoelectric actuator 100 and the pilot valve When connecting, first fix the connecting plate 500 and the pilot valve body 210 with screws, and then screw the piezoelectric actuator 100 into the installation hole on the connecting plate 500 through the lock nut 12 until the output shaft of the piezoelectric actuator 100 There is a slight gap with the far end of the lever assembly, usually 0-3mm, and finally use the retraction nut to retract the piezoelectric actuator 100 to complete the installation of the piezoelectric actuator 100. When it is necessary to adjust the piezoelectric actuator 100 When the position is adjusted, the initial installation position of the piezoelectric actuator 100 is adjusted through the adjustment component 10 , so as to improve the installation efficiency of the piezoelectric actuator 100 .

In some embodiments, the reversing valve body 2001 further includes a protective cover 13 , the protective cover 13 is sheathed outside the piezoelectric actuator 100 , and the protective cover 13 is connected with the pilot valve body 210 .

Specifically, the protective cover 13 is sleeved on the outside of the piezoelectric actuator 100, which can protect the piezoelectric actuator 100 while changing the appearance of the piezoelectric actuator 100 to improve the aesthetics. The protective cover 13 provided outside the piezoelectric actuator 100 can improve the dustproof, waterproof and explosion-proof performance of the piezoelectric actuator 100 .

Optionally, the wires of the two piezoelectric actuators 100 are connected to one terminal 400, which is a multi-core wire joint.

In some embodiments, the pilot valve core assembly 220 also includes a spring seat 14 and a second elastic member 15, the spring seat 14 is arranged in the valve seat 1, one end of the spring seat 14 abuts against the pressure rod 2, and the other end of the spring seat 14 One end abuts against the second elastic member 15, the reversing valve assembly 300 includes a reversing valve body 310 and a reversing valve core group 320, the reversing valve core group 320 is arranged in the reversing valve body 310, and the reversing valve The body 310 communicates with the pilot valve body 210 .

Specifically, the spring seat 14 is arranged in the valve seat 1, the right end of the spring seat 14 abuts against the pressure rod 2, the left end of the spring seat 14 abuts against the second elastic member 15, and the spring seat 14 and the second elastic member 15 contact each other. Setting, can improve the sealing performance of the pilot valve. The upper end of the reversing valve body 310 is connected with the lower end of the pilot valve body 210, the reversing valve assembly 300 is set in the reversing valve body 310 and communicates with the pilot valve assembly 200, and the pilot valve assembly 200 is driven to open by the piezoelectric actuator 100 Drive the movement of the reversing valve.

For example, the number of pilot valve assemblies 200 can be set to 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

As used herein, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean specific features, structures, materials, or features described in connection with the embodiment or example. A feature is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. A multi-way reversing valve control system is characterized in that, comprising: control unit; A plurality of reversing valve units independent of each other, the control unit is respectively connected to the plurality of reversing valve units, each of the plurality of reversing valve units includes a reversing valve body and a relay, one end of the relay is connected to the The control unit is connected, and the other end of the relay is connected to the main body of the reversing valve; A transformer, one end of the transformer is adapted to be connected to a power supply, and the other end of the transformer is respectively connected to the relays in the plurality of reversing valve units. 2. The multi-way reversing valve control system according to claim 1, wherein the reversing valve body includes a pilot valve assembly and a reversing valve assembly, and the pilot valve assembly is connected to the reversing valve assembly , the pilot valve assembly includes a pilot valve body and a pilot spool assembly, the pilot spool assembly is arranged in the pilot valve body, the pilot spool assembly includes a valve seat and a pressure rod, and the pressure rod passes through the Inside the valve seat, and the pressure rod is movable in the length direction of the valve seat; A piezoelectric actuator, the piezoelectric actuator includes a driving part, the driving part is connected to the end of the pressure rod away from the valve seat, and the driving part can drive the pressure rod to move on the valve seat. Move along the length of the seat. 3. The multi-way reversing valve control system according to claim 2, wherein the piezoelectric actuator further comprises a housing, a piezoelectric ceramic sheet and a cable, the housing has a cavity, and the The piezoelectric ceramic sheet is arranged in the chamber, one end of the cable passes through the housing and is connected to one end of the piezoelectric ceramic sheet, and the other end of the piezoelectric ceramic sheet is connected to the driving component . 4. The multi-way reversing valve control system according to claim 3, wherein the piezoelectric actuator further comprises a first elastic member, the first elastic member is arranged in the chamber, the The first elastic member is sleeved on the driving part, and one end of the first elastic member is in contact with the side of the driving part away from the piezoelectric ceramic sheet, and the other end of the first elastic member is in contact with the piezoelectric ceramic sheet. abut against the inner wall of the casing. 5. The multi-way reversing valve control system according to claim 3, wherein the piezoelectric actuator further comprises a swing rod, one end of the swing rod is pivotally connected to the housing, and the swing rod The other end of the rod is swingable, and the swing rod abuts against the driving member. 6. The multi-way reversing valve control system according to claim 5, characterized in that, the piezoelectric actuator further comprises an adjustment assembly, and the adjustment assembly is used to adjust the extension of the end of the swing rod away from the housing. depth into the pilot valve body. 7. The multi-way reversing valve control system according to claim 6, characterized in that, the driving part comprises a detachably connected driving block and a driving rod, the adjusting assembly is arranged in the housing, and the The adjustment assembly includes a connecting sleeve, the connecting sleeve is passed through the driving block, the driving rod extends into the connecting sleeve, and the depth of the driving rod extending into the connecting sleeve is adjustable. 8. The multi-way reversing valve control system according to claim 6, characterized in that, the driving component comprises a driving block and a driving rod integrally formed, the adjusting assembly is arranged outside the housing, and the adjusting assembly It is connected with the swing rod, and the adjustment assembly is connected with the end of the swing rod away from the housing, the adjustment assembly includes an adjustment rod, and the adjustment rod is passed through the swing rod, and the The adjusting rod is movable in the length direction of the casing, and one end of the adjusting rod is adapted to extend into the pilot valve body and be connected with the pressing rod. 9. The multi-way reversing valve control system according to claim 8, characterized in that, the main body of the reversing valve further includes a connecting sleeve and a lock nut, and the piezoelectric actuator is passed through the connecting sleeve. In the sleeve, one end of the connecting sleeve extends into the pilot valve body, and the nut is sleeved on the connecting sleeve. 10. The multi-way reversing valve control system according to any one of claims 2-9, wherein the pilot spool assembly further includes a spring seat and a second elastic member, the spring seat is arranged on the In the valve seat, one end of the spring seat is in contact with the pressure rod, and the other end of the spring seat is in contact with the second elastic member, The reversing valve assembly includes a reversing valve body and a reversing valve core assembly, the reversing valve core assembly is arranged in the reversing valve body, and the reversing valve body communicates with the pilot valve body.

Images