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

Control system of multi-way reversing valve

Technical Field

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

Background

The multi-way reversing valve is a combined valve composed of more than two reversing valves, and the typical reversing valve comprises an electromagnetic reversing valve and a hydraulic pilot reversing valve, and the electromagnetic reversing valve comprises an electromagnetic pilot valve part and a main valve part. An electromagnetic pilot valve in an electromagnetic reversing valve in the related art uses an electromagnet to convert an electric signal into mechanical displacement so as to drive a pilot valve core to be opened. However, the electromagnet has a complex structure and a large volume, and because of the limitation of the using power consumption, the generated thrust is small, and the insufficient thrust of the compression bar is easy to cause liquid leakage.

Disclosure of Invention

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

The control system of the multi-way reversing valve of the embodiment of the invention comprises: a control unit; the control units are 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 units, and the other ends of the relays are connected with the reversing valve main bodies; and one end of the transformer is suitable for being connected with a power supply, and the other end of the transformer is respectively connected with the relays in the reversing valve units.

The control system of the multi-way reversing valve can improve the flow control precision of the control system of the fluid multi-way reversing valve.

In some embodiments, the reversing valve main body comprises a pilot valve assembly and a reversing valve assembly, the pilot valve assembly is connected with the reversing valve assembly, the pilot valve assembly comprises a pilot valve body and a pilot valve core assembly, the pilot valve core assembly is arranged in the pilot valve body, the pilot valve core assembly comprises a valve seat and a pressure rod, the pressure rod is arranged in the valve seat in a penetrating manner, and the pressure rod is movable in the length direction of the valve seat; the piezoelectric actuator comprises a driving part, the driving part is connected with one end of the pressure rod, which is far away from the valve seat, and the driving part can drive the pressure rod to move in the length direction of the valve seat.

In some embodiments, the piezoelectric actuator further includes a housing having a chamber therein, a piezoelectric ceramic plate disposed in the chamber, and a cable having one end connected to one end of the piezoelectric ceramic plate through the housing and the other end connected to the driving member.

In some embodiments, the piezoelectric actuator further includes a first elastic member disposed in the chamber, the first elastic member is sleeved on the driving member, one end of the first elastic member abuts against one side of the driving member away from the piezoelectric ceramic sheet, and the other end of the first elastic member abuts against an inner wall surface of the housing.

In some embodiments, the piezoelectric actuator further comprises a swing link, one end of the swing link is pivoted with the housing, the other end of the swing link is swingable, and the swing link abuts the driving member.

In some embodiments, the piezoelectric actuator further comprises an adjustment assembly for adjusting the depth to which the end of the swing stem distal from the housing extends into the pilot valve body.

In some embodiments, the driving component comprises a detachably connected driving block and a driving rod, the adjusting component is arranged in the shell, the adjusting component comprises a connecting sleeve, the connecting sleeve penetrates through the driving block, the driving rod stretches into the connecting sleeve, and the depth of the driving rod stretching into the connecting sleeve is adjustable.

In some embodiments, the driving component comprises a driving block and a driving rod which are integrally formed, the adjusting component is arranged outside the shell, the adjusting component is connected with the swinging rod, the adjusting component is connected with one end of the swinging rod away from the shell, the adjusting component comprises an adjusting rod, the adjusting rod is arranged in the swinging rod in a penetrating mode, the adjusting rod is movable in the length direction of the shell, and one end of the adjusting rod is suitable for extending into the pilot valve body and is connected with the pressing rod.

In some embodiments, the reversing valve body further comprises a connecting sleeve and a locking nut, the piezoelectric actuator is arranged in the connecting sleeve in a penetrating mode, one end of the connecting sleeve stretches into the pilot valve body, and the nut is sleeved on the connecting sleeve.

In some embodiments, the pilot valve element assembly further comprises a spring seat and a second elastic member, the spring seat is arranged in the valve seat, one end of the spring seat is in butt joint with the pressure rod, the other end of the spring seat is in butt joint with the second elastic member, the reversing valve assembly comprises a reversing valve body and a reversing valve element assembly, the reversing valve element assembly is arranged in the reversing valve body, and the reversing valve body is communicated with the pilot valve body.

Drawings

Fig. 1 is a schematic structural diagram of a control system of a multiple directional control valve according to an embodiment of the present invention.

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

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

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

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

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

Reference numerals:

the control unit 1000, the reversing valve unit 2000, the reversing valve main body 2001,

the piezoelectric actuator 100, the pilot valve assembly 200, the pilot valve body 210, the pilot valve core assembly 220, the reversing valve assembly 300, the reversing valve body 310, the reversing valve core group 320, the connection terminal 400, the connection plate 500,

the device comprises a valve seat 1, a compression bar 2, a driving part 3, a driving block 31, a driving rod 32, a shell 4, a cavity 41, a piezoelectric ceramic piece 5, a cable 6, a first elastic piece 7, a swing rod 8, a first through hole 81, a second through hole 9, an adjusting component 10, a connecting sleeve 101, an adjusting rod 102, a connecting sleeve 11, a locking nut 12, a protective cover 13, a spring seat 14, a second elastic piece 15, a mounting seat 16, a rotating shaft 17, a relay 18, a transformer 19, an upper computer 20, a first controller 21 and a second controller 22.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1, the control system for the multiple directional control valve according to the embodiment of the present invention includes a control unit 1000, a plurality of mutually independent directional control valve units 2000 and a transformer 19, where the control unit 1000 is connected to the plurality of directional control valve units 2000, each of the plurality of directional control valve units 2000 includes a directional control valve main 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 directional control valve main body 2001, one end of the transformer 19 is connected to a power supply, and the other end of the transformer 19 is connected to the relay 18 in the plurality of directional control valve units 2000.

Specifically, as shown in fig. 1, the control unit 1000 includes an upper computer 20, a first controller 21 and a second controller 22, signal input ends of the first controller 21 and the second controller 22 are respectively connected to the upper computer 20, and signal output ends of the first controller 21 and the second controller 22 are respectively connected to the relay 18.

For example, the first controller 21 is a normal switch controller, and the first controller 21 is configured to receive a command from the host computer 20 and output a switch signal to control the relay 18. When the upper computer 20 sends an on command, the first controller 21 outputs an excitation quantity to enable the relay 18 to be started; when the upper computer 20 issues an off command, the first controller 21 stops outputting the excitation amount, and turns off the relay 18.

The second controller 22 receives a command from the host computer 20 for the PWM type switching controller, and outputs a pulse width modulation signal 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 reaches the specified requirement, the high-voltage power inlet and the high-voltage power outlet are conducted; otherwise, closing. The voltage of the high-voltage end 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 terminals of the PWM type switch controller and the normal switch controller typically have N channels, and each channel controls a set of relays 18 and piezoelectric actuators. N is an arbitrary constant. I.e. the number of outputs of the two controllers may be combined arbitrarily.

The transformer 19 is used to convert the low-voltage dc power input from the power supply into high-voltage power meeting the requirements of the piezoelectric actuator, the voltage requirement of the piezoelectric actuator is typically 0-1000V, and the voltage available in the working environment is typically 0-220V.

According to the reversing control system for the multi-way valve, disclosed by the embodiment of the invention, the opening of the relay 18 is controlled simultaneously or respectively by arranging the first controller 21 and the second controller 22, so that the reversing valve main body 2001 is controlled to be opened and closed, and the flow control precision of the control system for the multi-way valve for the fluid is improved.

As shown in fig. 2 to 6, the reversing valve main body 2001 includes the pilot valve assembly 200 and the reversing valve assembly 300 and the piezoelectric actuator 100. The pilot valve assembly 200 is connected with the reversing valve assembly 300, the pilot valve assembly 200 comprises 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 comprises a valve seat 1 and a pressure lever 2, the pressure lever 2 is arranged in the valve seat 1 in a penetrating manner, and the pressure lever 2 can move in the length direction (left-right direction as shown in fig. 3) of the valve seat 1. The piezoelectric actuator 100 includes a driving member 3, the driving member 3 is connected to an end of the pressure lever 2 away from the valve seat 1, and the driving member 3 can drive the pressure lever 2 to move in 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 disposed in the pilot valve body 210, the right end of the pilot valve body 210 is connected to the left end of the piezoelectric actuator 100, the pressure rod 2 is disposed in the valve seat 1 in a penetrating manner, the left end of the driving part 3 is connected to the right end of the pressure rod 2, and the left-right movement of the driving part 3 drives the pressure rod 2 to move in the left-right direction.

When a potential difference is applied to the piezoelectric actuator 100, the driving component 3 is displaced under the action of the potential difference to generate thrust, the left-right movement of the pressing rod 2 is driven by the connection of the driving component 3 and the pressing rod 2 to push the valve core of the pilot valve to move, so that the movement of the reversing valve assembly 300 is pushed, the expansion and contraction amount of the driving component 3 of the piezoelectric actuator 100 and the control voltage are in a certain proportional relation, the displacement of the valve core can be accurately controlled by controlling the size of the potential difference, and the flow and the pressure of a valve port of a multi-way reversing valve control system can be adjusted, so that the flow control precision of the multi-way reversing valve control system is improved.

Because the thrust generated by the movement of the electromagnet driving valve core is 5-40N, and the thrust required by the pilot valve core assembly 220 to be opened in operation is usually 40-80N, a lever assembly is arranged between the electromagnet and the pilot valve core to amplify the thrust in the related technology, the thrust generated by the piezoelectric actuator 100 of the embodiment of the invention is 50-100000N, which is far greater than the thrust required by the action of the pilot valve core assembly 220, and the driving component 3 of the embodiment of the invention is directly connected with the pressure lever 2, thereby reducing the overall size of the pilot valve assembly 200 and the manufacturing cost of the pilot valve assembly 200, and further reducing the overall size and the manufacturing cost of a multi-way reversing valve control system.

The multi-way reversing valve control system of the embodiment of the invention controls the movement of the pressure lever 2 in the pilot valve core assembly 220 through the piezoelectric actuator 100, the pilot valve assembly 200 is connected with the reversing valve assembly 300 to drive the reversing valve assembly 300 to move, and compared with the control modes of electromagnets and the like in the related art, the piezoelectric actuator 100 has the advantages of higher response speed, larger output force and lower power consumption, and the control precision of the pilot valve assembly 200 is improved by controlling the displacement of the pressure lever 2 through the piezoelectric actuator 100, so that the flow control precision of the multi-way reversing valve control system is improved.

It should be noted that, the main liquid inlet on the valve body of the reversing valve assembly 300 is communicated with the liquid inlet channel; the channel penetrates through the valve body, two ends of the channel are sealed by bolts, the channel is communicated with a liquid inlet cavity of the plug-in type reversing valve core assembly 320, and two ends of the channel are sealed; meanwhile, another channel is communicated with the liquid inlet cavity of the pilot valve assembly 200 through the cartridge liquid inlet check valve by the precision filter. The channel penetrates through the valve body, and two ends of the channel are sealed; in addition, a main liquid return port on the valve body is communicated with the liquid return channel; the liquid return channel penetrates through the valve body, and two ends of the liquid return channel are sealed and respectively communicated with a liquid return cavity of the plug-in type reversing valve group; the liquid return port of the electromagnetic pilot valve is communicated with the main liquid return port through a plug-in type liquid return one-way valve.

The pilot valve assembly 200 further comprises a threaded sleeve, a pressing sleeve, a guide sleeve, a first magnetic ball, an ejector rod and a second magnetic ball, wherein the ejector rod and the second magnetic ball are arranged in the valve seat 1, the pressing sleeve is arranged between the valve seat 1 and the guide sleeve, a first pressure rod 2 hole combination is arranged in the pressing sleeve, a second pressure rod 2 hole is arranged in the guide sleeve, the second magnetic ball is arranged in the first pressure rod 2 hole combination, the pressure rod 2 sequentially penetrates through the first pressure rod 2 hole combination and the second pressure rod 2 hole and then is connected with the lever assembly through the screw fine adjustment combination, and the guide sleeve, the pressing sleeve and the pressure rod 2 are simple in matched structure, high-pressure leakage points are reduced, the number of fault points is small, and the service life is prolonged.

Optionally, the combination of first depression bar 2 hole includes to press the cover macropore and presses the cover aperture, and depression bar 2 is equipped with depression bar 2 head and depression bar 2 pole portion, and depression bar 2 head is in pressing the cover macropore internal motion for control second magnetic ball switch on and close, and depression bar 2 pole portion passes presses cover aperture and second depression bar 2 hole, and this structure action is reliable and stable. The guide sleeve is provided with the sealing ring mounting groove, the O-shaped ring is arranged in the sealing ring mounting groove, the O-shaped ring is not subjected to high-pressure liquid, the leakage hidden danger is reduced, and the sealing effect is good.

In some embodiments, the piezoelectric actuator 100 further includes a housing 4, a piezoelectric ceramic plate 5, and a cable 6, where the housing 4 has a chamber 41, the piezoelectric ceramic plate 5 is disposed in the chamber 41, one end of the cable 6 passes through the housing 4 and is connected to one end of the piezoelectric ceramic plate 5, and the other end of the piezoelectric ceramic plate 5 is connected to the driving part 3.

Specifically, the driving part 3 is disposed in the housing 4, the right end of the driving part 3 is connected to the piezoelectric ceramic plate 5, and the left end of the driving part 3 extends out of the housing 4 to be connected to the compression bar 2.

Alternatively, when the lower end of the cable 6 passes through the housing 4 to apply a potential difference to both ends of the piezoelectric ceramic plate 5, the piezoelectric ceramic plate 5 extends axially, the driving part 3 moves leftwards under the axial extension of the piezoelectric ceramic plate 5, and the left end of the driving part 3 is connected with the right end of the compression rod 2 to push the compression rod 2 to move leftwards.

In some embodiments, the piezoelectric actuator 100 further includes a first elastic member 7, the first elastic member 7 is disposed in the chamber 41, the driving member 3 is sleeved on the first elastic member 7, one end of the first elastic member 7 abuts against a side of the driving member 3 away from the piezoelectric ceramic piece 5, and the other end of the first elastic member 7 abuts against an inner wall surface of the housing 4.

Specifically, the left end at cavity 41 is established to first elastic component 7, and first elastic component 7 cover is established on drive part 3, and the left end of first elastic component 7 and the internal face butt of casing 4, the right-hand member butt of first elastic component 7 makes drive part 3 closely link to each other with piezoceramics piece 5 through setting up of first elastic component 7, ensures that piezoceramics piece 5 takes place the displacement that axial extension's can effectively transmit drive part 3 for drive part 3 drives depression bar 2 motion, and then reduces the energy consumption of piezoceramics 100.

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

As shown in fig. 4, the left end of the driving part 3 is abutted with the middle part of the right side of the swing rod 8, the upper end of the swing rod 8 is pivoted with the shell 4, and the lower end of the swing rod 8 can rotate around a pivot point.

Optionally, the piezoelectric actuator 100 further includes a mounting seat 16 and a rotation shaft 17, the right end of the mounting seat 16 is connected with the left end of the housing 4, the upper end of the swing rod 8 is provided with a first through hole 81, the lower end of the rotation shaft 17 sequentially passes through the mounting seat 16 and the first through hole 81 to fix the upper end of the swing rod 8 on the mounting seat 16, so that the pivoting between the swing rod 8 and the mounting seat 16 is realized, that is, the swing rod 8 can rotate around the rotation shaft.

For example, the mounting seat 16 and the housing 4 may be connected by screw, and the present invention is not limited to a specific connection manner between the mounting seat 16 and the housing 4, as long as the rigid connection between the mounting seat 16 and the housing 4 can be achieved, which falls within the scope of the present invention.

According to the embodiment of the invention, the displacement magnification factor of the swing rod 8 can be adjusted by adjusting the distance between the abutting point of the driving part 3 and the swing rod 8 and the pivoting point of the swing rod 8, namely by adjusting the proportional value of the distance between one end of the swing rod 8 far away from the pivoting point and the distance between the abutting point of the driving part 3 and the swing rod 8 and the pivoting point of the swing rod 8.

When a potential difference is applied to the piezoelectric actuator 100, the piezoelectric ceramic plate 5 extends axially, the driving component 3 moves leftwards under the action of the axial extension of the piezoelectric ceramic plate 5, the left end of the driving component 3 is abutted with the middle part of the right side of the swinging rod 8 to push the swinging rod 8 to move leftwards, the swinging rod 8 is driven to move leftwards to rotate around the rotating shaft 17, the lower end of the swinging rod 8 can generate larger displacement under the action of the driving component 3 leftwards, namely, the middle part of the swinging rod 8 is pushed to rotate leftwards by the driving component 3, so that the lower end of the swinging rod 8 can generate larger displacement, and the stroke of the piezoelectric actuator 100 is improved.

It should be noted that, in the related art, in order to increase the displacement amount generated by the piezoelectric actuator 100, several tens to several hundreds of piezoelectric ceramic plates 5 need to be stacked to increase the displacement amount of the piezoelectric actuator 100, but stacking a plurality of piezoelectric ceramic plates 5 increases the size and volume of the piezoelectric actuator 100, by using a smaller number of piezoelectric ceramic plates 5 to stack, the driving member 3 is driven to move leftwards, so that the driving member 3 drives the middle part of the swing rod 8 to displace leftwards, and according to the lever principle, the displacement amount of the driving member 3 leftwards under the action force of the axial extension of the piezoelectric ceramic plates 5 is smaller than the displacement amount of the lower part of the swing rod 8, that is, by using a smaller number of piezoelectric ceramic plates 5 to stack, the stroke of the piezoelectric actuator 100 is increased, and by using a smaller number of piezoelectric ceramic plates 5, the size and volume of the piezoelectric actuator 100 can be reduced, so that the cost and the consumption of the control system of the multi-way reversing valve can be reduced.

In some embodiments, the piezoelectric actuator 100 further includes an adjustment assembly 10, the adjustment assembly 10 being configured to adjust the depth to which the end of the rocker 8 remote from the housing 4 protrudes into the pilot valve body 210.

As shown in fig. 5, the distance between the lower end of the swing rod 8 and the housing 4 is adjusted by the adjusting assembly 10, so as to adjust the depth of the lower end of the swing rod 8 extending into the pilot valve body 210, thereby realizing the adjustment of the initial installation position of the swing rod 8.

It should be noted that, because the distance of the piezoelectric ceramic plate 5 extending axially is in the micron level, the adjustment of the piezoelectric actuator 100 on the displacement is in the micron level, generally 0-500 μm, and the moving distance of the pilot valve core is in 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, the working area of the piezoelectric actuator 100 is exceeded, and the piezoelectric actuator 100 is caused to be out of operation, so that the piezoelectric actuator 100 needs to be frequently disassembled to adjust the installation position of the piezoelectric actuator 100, that is, the installation position of the piezoelectric actuator 100 needs to be very high when the piezoelectric actuator 100 is in use, the distance of the swing rod 8 extending into the pilot valve body 210 is adjusted by setting the adjusting assembly 10, so that the precision requirement of the piezoelectric actuator 100 on the installation position is reduced, the adjustment of the initial installation position of the piezoelectric actuator 100 is realized, and the installation efficiency of the piezoelectric actuator 100 is improved.

Optionally, a certain gap exists between each part on a transmission path between the driving part 3 of the piezoelectric actuator 100 and the compression bar 2, when the total length of the gap exceeds the working area of the piezoelectric actuator 100, or the effective total length of each part on the transmission path is larger than the required length between the piezoelectric actuator 100 and the compression bar 2, the initial installation position of the piezoelectric actuator 100 needs to be adjusted when the compression bar 2 cannot be in sealed connection with the valve seat 1 at the initial position, in the related art, the installation position needs to be adjusted after the piezoelectric actuator 100 is integrally removed, so that the piezoelectric actuator 100 is frequently installed and the accuracy of adjusting the installation position every time is difficult to ensure.

In some embodiments, the drive member 3 comprises a drive block 31 and a drive rod 32 detachably connected, the adjustment assembly 10 is provided in the housing 4, and the adjustment assembly 10 comprises a connection sleeve 101, the connection sleeve 101 is provided in the drive block 31 in a penetrating manner, the drive rod 32 extends into the connection sleeve 101, and the depth of the drive rod 32 extending into the connection sleeve 101 is adjustable.

Specifically, the connecting sleeve 101 is arranged in the driving block 31 in a penetrating manner, the right end of the driving rod 32 stretches into the connecting sleeve 101 to be detachably connected with the driving block 31 so as to adjust the depth of the right end of the driving rod 32 stretching into the driving block 31, the right end of the driving block 31 is connected with the piezoelectric ceramic plate 5, the left end of the driving rod 32 is abutted with the middle part of the right side of the swinging rod 8, the upper end of the swinging rod 8 is pivoted with the mounting seat 16, the lower end of the swinging rod 8 can rotate around the pivot point, and the length of the left end of the swinging rod 8 stretching into the pilot valve body 210 is adjusted by adjusting the depth of the right end of the driving rod 32 stretching into the connecting sleeve 101, so that the initial mounting position of the piezoelectric actuator 100 is adjusted, and the mounting efficiency of the piezoelectric actuator 100 is improved.

Optionally, the piezoelectric ceramic piece 5 is of an annular structure, the second through hole 9 is arranged at the central shaft position of the piezoelectric ceramic piece 5, the connecting sleeve 101 is arranged in the driving block 31 in a penetrating manner, the left end of the adjusting tool can extend into the second through hole 9 to be inserted into the connecting sleeve 101 so as to adjust the distance that the right end of the driving rod 32 extends into the connecting sleeve 101, and then the length that the lower end of the swinging rod 8 extends into the pilot valve body 210 is adjusted, so that the initial assembly position of the piezoelectric actuator 100 is adjusted, and the installation efficiency of the piezoelectric actuator 100 is improved.

According to the embodiment of the invention, the second through hole 9 is formed in the piezoelectric actuator 100, the connecting sleeve 101 is arranged on the driving block 31, the adjusting tool is inserted into the connecting sleeve 101 through the second through hole 9 to adjust the depth of the right end of the driving rod 32 extending into the driving block 31, further adjust the distance of the swing rod 8 extending into the pilot valve body 210, after the adjustment of the initial installation position of the piezoelectric actuator 100 is realized, potential difference is applied to two ends of the piezoelectric ceramic plate 5, the piezoelectric ceramic plate 5 axially extends, the driving block 31 moves leftwards under the axial extension action of the piezoelectric ceramic plate 5, and the leftward movement of the driving block 31 drives the driving rod 32 to move leftwards, so that the swing rod 8 is pushed to move leftwards, and the leftward movement of the pressing rod 2 is realized.

For example, the driving rod 32 and the driving block 31 are connected by screw threads, the connection position of the driving rod 32 and the connecting sleeve 101 is correspondingly set to be an adjusting structure matched with the internal screw threads and the external screw threads, the structure of the screw threads is finer, the adjusting precision is higher, and the adjusting is quick and convenient.

For example, the second through hole 9 is a hexagon socket, the adjusting tool is a hexagon socket screw driver or a hexagon socket wrench matched with the hexagon socket, that is, the left end of the hexagon screw driver is inserted into the connecting sleeve 101 through the second through hole 9, and the position of the driving shaft is adjusted by rotating the hexagon screw driver, so as to realize accurate adjustment of the depth of the driving rod 32 extending into the connecting sleeve 101.

In some embodiments, the driving part 3 comprises a driving block 31 and a driving rod 32 which are integrally formed, the adjusting assembly 10 is arranged outside the shell 4, the adjusting assembly 10 is connected with the swinging rod 8, the adjusting assembly 10 is connected with one end of the swinging rod 8 far away from the shell 4, the adjusting assembly 10 comprises an adjusting rod 102, the adjusting rod 102 is arranged in the swinging rod 8 in a penetrating way, the adjusting rod 102 is movable in the length direction of the shell 4, and one end of the adjusting rod 102 is suitable for extending into the pilot valve body 210 and is connected with the pressing rod 2.

Specifically, as shown in fig. 6, the adjusting component 10 is disposed outside the housing 4, the adjusting component 10 is connected with the lower end of the swing rod 8, the left end of the adjusting rod 102 extends into the pilot valve body 210 to be connected with the pressure rod 2, the right end of the adjusting rod 102 extends into the lower end of the swing rod 8, and the adjusting rod 102 extends into the depth of the swing rod 8 to adjust the length of the adjusting rod 102 extending into the valve seat 1, so that the adjustment of the initial mounting position of the piezoelectric actuator 100 is realized, and the mounting efficiency of the piezoelectric actuator 100 is improved.

Optionally, the adjusting component 10 is arranged outside the shell 4, so that the angle between the swing rod 8 and the driving rod 32 can be conveniently adjusted, namely, the depth of the adjusting rod 102 extending into the swing rod 8 can be conveniently adjusted, and when the swing rod 8 is worn, the swing rod 8 can be conveniently replaced.

For example, when the adjusting rod 102 is connected with the swing rod 8 by adopting threads, the depth of the adjusting rod 102 extending into the swing rod 8 can be adjusted by only rotating the wrench to clamp the adjusting rod 102.

It will be appreciated that the piezoelectric actuator 100 according to the embodiment of the present invention may include both the adjusting component 10 and the swing rod 8, may include only the adjusting component 10, and the position of the adjusting component 10 may be disposed inside the housing 4 or outside the housing 4, where the specific arrangement of the piezoelectric actuator 100 is based on the actual requirement.

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

Specifically, the connecting sleeve 11 is provided at the right end of the pilot valve, and the left end portion of the connecting sleeve 11 extends into the pilot valve body 210 to fix the position of the connecting sleeve 11, and the piezoelectric actuator 100 and the pilot valve body 210 are connected by fitting the lock nut 12 over the connecting sleeve 11.

Optionally, the pilot valve further includes a connection plate 500, the left end of the connection plate 500 is connected with the pilot valve body 210, the right end of the connection plate 500 is connected with the piezoelectric actuator 100, that is, when the piezoelectric actuator 100 is connected with the pilot valve, the connection plate 500 is fixed with the pilot valve body 210 through a screw, then the piezoelectric actuator 100 is screwed into a mounting hole on the connection plate 500 through a lock nut 12 until a tiny gap, usually 0-3mm, exists between an output shaft of the piezoelectric actuator 100 and a distal end of a lever assembly, and finally the piezoelectric actuator 100 is retracted by using a retraction nut, so that the mounting of the piezoelectric actuator 100 is completed, and when the position of the piezoelectric actuator 100 needs to be adjusted, the initial mounting position of the piezoelectric actuator 100 is adjusted through an adjusting assembly 10, so that the mounting efficiency of the piezoelectric actuator 100 is improved.

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

Specifically, the protective cover 13 is fitted around the piezoelectric actuator 100, so that the piezoelectric actuator 100 can be protected, the appearance of the piezoelectric actuator 100 can be changed, the appearance can be improved, and the dustproof, waterproof and flameproof performance of the piezoelectric actuator 100 can be improved by providing the protective cover 13 outside the piezoelectric actuator 100.

Alternatively, the wiring of the two piezoelectric actuators 100 is connected to one wiring terminal 400, and the wiring terminal 400 is a multi-core wire joint.

In some embodiments, the pilot valve core assembly 220 further includes a spring seat 14 and a second elastic member 15, the spring seat 14 is disposed in the valve seat 1, one end of the spring seat 14 abuts against the compression rod 2, the other end of the spring seat 14 abuts against the second elastic member 15, the reversing valve assembly 300 includes a reversing valve body 310 and a reversing valve core assembly 320, the reversing valve core assembly 320 is disposed in the reversing valve body 310, and the reversing valve body 310 is in communication with the pilot valve body 210.

Specifically, the spring seat 14 is disposed in the valve seat 1, the right end of the spring seat 14 abuts against the compression rod 2, the left end of the spring seat 14 abuts against the second elastic member 15, and the sealing performance of the pilot valve can be improved through the arrangement of the spring seat 14 and the second elastic member 15. 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 arranged in the reversing valve body 310 and is communicated with the pilot valve assembly 200, and the piezoelectric actuator 100 drives the pilot valve assembly 200 to open so as to drive the reversing valve to move.

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

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A multiple directional control valve control system, comprising:

a control unit;

the control units are 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 units, and the other ends of the relays are connected with the reversing valve main bodies;

and one end of the transformer is suitable for being connected with a power supply, and the other end of the transformer is respectively connected with the relays in the reversing valve units.

2. The multiple directional control valve control system of claim 1 characterized in that the directional control valve body comprises a pilot valve assembly and a directional control valve assembly, the pilot valve assembly is connected with the directional control valve assembly, the pilot valve assembly comprises a pilot valve body and a pilot valve core assembly, the pilot valve core assembly is arranged in the pilot valve body, the pilot valve core assembly comprises a valve seat and a pressure lever, the pressure lever is arranged in the valve seat in a penetrating way, and the pressure lever is movable in the length direction of the valve seat;

the piezoelectric actuator comprises a driving part, the driving part is connected with one end of the pressure rod, which is far away from the valve seat, and the driving part can drive the pressure rod to move in the length direction of the valve seat.

3. The multiple directional control valve control system of claim 2 characterized in that the piezoelectric actuator further comprises a housing having a chamber therein, a piezoelectric ceramic plate disposed in the chamber, and a cable having one end connected to one end of the piezoelectric ceramic plate through the housing and the other end connected to the driving member.

4. The multiple directional control valve control system of claim 3 characterized in that the piezoelectric actuator further comprises a first elastic member, the first elastic member is disposed in the chamber, the first elastic member is sleeved on the driving member, one end of the first elastic member abuts against one side of the driving member away from the piezoelectric ceramic plate, and the other end of the first elastic member abuts against the inner wall surface of the housing.

5. The multiple directional control valve control system of claim 3 characterized in that the piezoelectric actuator further comprises a rocker, one end of the rocker is pivotally connected to the housing, the other end of the rocker is swingable, and the rocker abuts the driving member.

6. The multiple directional control valve control system of claim 5 characterized in that the piezoelectric actuator further comprises an adjustment assembly for adjusting the depth to which the end of the pendulum rod remote from the housing extends into the pilot valve body.

7. The multiple directional control valve control system of claim 6 characterized in that the drive component comprises a removably attachable drive block and drive rod, the adjustment assembly is disposed within the housing, and the adjustment assembly comprises a connection sleeve disposed through the drive block, the drive rod extends into the connection sleeve, and the depth of the drive rod extending into the connection sleeve is adjustable.

8. The multiple directional control valve control system of claim 6 characterized in that the drive component comprises an integrally formed drive block and drive rod, the adjustment assembly is disposed outside the housing, the adjustment assembly is connected with the swing rod, and the adjustment assembly is connected with one end of the swing rod away from the housing, the adjustment assembly comprises an adjustment rod, the adjustment rod is disposed in the swing rod in a penetrating manner, and the adjustment rod is movable in the length direction of the housing, and one end of the adjustment rod is adapted to extend into the pilot valve body and is connected with the pressure rod.

9. The multiple directional control valve control system of claim 8 characterized in that the directional control valve body further comprises a connecting sleeve and a lock nut, the piezoelectric actuator is threaded into the connecting sleeve, one end of the connecting sleeve extends into the pilot valve body, and the nut is sleeved on the connecting sleeve.

10. The multiple directional control valve control system according to any one of claims 2-9, characterized in that the pilot spool assembly further comprises a spring seat and a second elastic member, the spring seat is provided in the valve seat, one end of the spring seat abuts against the pressure lever, the other end of the spring seat abuts against the second elastic member,

the reversing valve assembly comprises 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 is communicated with the pilot valve.

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