CN221003359U

CN221003359U - Pneumatic hydraulic driving device and hydraulic station

Info

Publication number: CN221003359U
Application number: CN202322826983.1U
Authority: CN
Inventors: 汪时安
Original assignee: Ningbo Ruichen Metal Products Co ltd
Current assignee: Ningbo Ruichen Metal Products Co ltd
Priority date: 2023-10-21
Filing date: 2023-10-21
Publication date: 2024-05-24
Anticipated expiration: 2033-10-21

Abstract

The utility model relates to a pneumatic hydraulic driving device and a hydraulic station, wherein the pneumatic hydraulic driving device comprises: the cylinder part comprises a cylinder assembly, a piston rod and a hydraulic piston, wherein the hydraulic piston is provided with at least one first one-way valve. The oil cylinder assembly comprises a hydraulic cylinder, a hydraulic sealing cover and a second one-way valve; the hydraulic piston slides in the hydraulic cylinder in a sealing manner and separates the hydraulic cylinder to form a first cavity and a second cavity, the through hole is communicated with the first cavity, the cylinder assembly is provided with an oil outlet communicated with the first cavity, the first one-way valve is opened unidirectionally from the second cavity to the first cavity, and the second one-way valve is opened unidirectionally from the hydraulic sealing cover to the second cavity. The cylinder part is driven by taking high-pressure gas as energy, the high-pressure gas is stably provided by an air source, and the output stability is high.

Description

Pneumatic hydraulic driving device and hydraulic station

Technical Field

The utility model relates to the technical field of hydraulic pressure, in particular to a pneumatic hydraulic driving device and a hydraulic station.

Background

The existing hydraulic pump station drives the hydraulic pump to operate by taking electric energy as an energy source, and the hydraulic pump station can be used as a power liquid power output structure of a machine tool cooling system or a lubricating system and needs to continuously operate so as to keep the stability of equipment operation.

The power utilization units such as the hydraulic motor and the electromagnetic valve in the hydraulic pump station need to continuously run, correspondingly, the power consumption needed by the power utilization units is large, particularly the power consumption of continuously running processing equipment is extremely large, and the accumulated power consumption of all the hydraulic pump stations in the whole factory is extremely large.

For example, chinese publication CN106523443a discloses a novel hydraulic pump station, an oil pump, an electromagnetic valve, and other power consuming units can be operated all the time to keep normal functions. However, the power consumption of the hydraulic pump station is large, and it is difficult to achieve the energy-saving effect, and as the pumping pressure increases, the volume of the hydraulic pump station needs to be increased, the power needs to be increased, and the technical problem of higher energy consumption is caused, so improvement is needed.

Disclosure of utility model

In order to overcome the problems in the related art, the embodiment of the utility model provides a pneumatic hydraulic driving device and a hydraulic station, which are used for solving the technical problems of high power consumption and large volume.

According to a first aspect of an embodiment of the present utility model, there is provided a pneumatic-hydraulic drive apparatus comprising:

the cylinder component comprises a cylinder assembly, a piston rod which stretches and contracts to move in the cylinder assembly and a hydraulic piston which is arranged at the end part of the piston rod, and the hydraulic piston is provided with at least one first one-way valve;

The oil cylinder assembly comprises a hydraulic cylinder fixed on the air cylinder assembly, a hydraulic sealing cover fixedly connected to the end part of the hydraulic cylinder and a second one-way valve arranged on the hydraulic sealing cover;

The hydraulic piston slides in the hydraulic cylinder in a sealing way and separates the hydraulic cylinder to form a first cavity and a second cavity, the first one-way valve is communicated with the first cavity, the cylinder assembly is provided with an oil outlet communicated with the first cavity, the first one-way valve is opened unidirectionally from the second cavity to the first cavity, and the second one-way valve is opened unidirectionally from the hydraulic sealing cover to the second cavity.

In an embodiment, the hydraulic piston comprises a piston main body and a sealing element arranged on the piston main body, the sealing element is provided with a sealing lip protruding obliquely from the second cavity to the first cavity, the sealing lip is elastically abutted against and seals the pipe wall of the hydraulic cylinder, and the first one-way valve is arranged on the piston main body.

In one embodiment, the hydraulic cover is connected to the hydraulic cylinder in a plug-in manner.

In an embodiment, the cylinder assembly comprises a pneumatic cylinder body, a pneumatic piston sliding on the pneumatic cylinder body, a valve core assembly installed on the pneumatic cylinder body, an upper reversing valve and a lower reversing valve, wherein the upper reversing valve and the lower reversing valve are relatively distributed at two ends of the pneumatic cylinder body, the pneumatic cylinder body is provided with a pneumatic control channel, an air inlet and an air outlet which are communicated with the pneumatic control channel, the valve core assembly slides on the pneumatic control channel, a piston rod is fixed on the pneumatic piston and penetrates out of the pneumatic cylinder body, and gas input from the air inlet drives the pneumatic piston to slide and controls the valve core assembly to switch after the pneumatic piston triggers the upper reversing valve or the lower reversing valve, so that the pneumatic piston can be switched in a reciprocating manner.

In an embodiment, the pneumatic cylinder body comprises an upper pneumatic seat, a lower pneumatic seat, a piston cylinder, a first air duct and a second air duct, wherein two ends of the piston cylinder are respectively connected with the upper pneumatic seat and the lower pneumatic seat, the pneumatic piston slides in the piston cylinder and separates the piston cylinder to form a third cavity and a fourth cavity, the first air duct is communicated with the fourth cavity and the pneumatic control channel, the pneumatic control channel is connected with the third cavity through an air vent, two ends of the second air duct are respectively communicated with the upper reversing valve and the lower reversing valve, the valve core assembly slidingly controls one of the air vent and the first air duct to input gas under the air pressure effect of the pneumatic control channel, and the other one of the air vent and the first air duct outputs gas.

In an embodiment, the valve core assembly comprises a valve rod and a plurality of sealing rings sleeved on the valve rod, blind hole-shaped air guide holes, first through holes and second through holes which are communicated with the air guide holes are formed in the valve rod from one end to the other end, the first through holes and the second through holes are distributed at intervals along the axial direction of the valve rod and are arranged at intervals through the sealing rings, the valve core assembly moves to control the pneumatic piston to form a retraction posture and an extension posture, and when the valve core assembly is in the retraction posture, the first through holes are correspondingly communicated with the first air guide pipes, and the second through holes are blocked with the air guide holes; when the air inlet is connected to the air guide hole, the first air guide hole is correspondingly blocked with the first air guide pipe, the second air guide hole is communicated with the air vent, and the air inlet is connected to the air guide hole.

In an embodiment, the pneumatic cylinder body includes the air guide seat of installing in go up the pneumatic seat, the pneumatic control passageway includes coaxial sliding hole and step hole that sets up, the valve rod including slide in the sliding part of sliding hole, slide in the piston portion of step hole and protrusion the guiding part of piston portion, air guide hole and first via hole and second via hole all distribute in the sliding part, the air guide seat seal the step hole and set up the intercommunication the second air guide pipe with the air guide passageway of step hole, the guiding part grafting slide in the air guide seat.

In an embodiment, the upper reversing valve comprises an upper reversing rod and an upper elastic piece elastically abutting against the upper reversing rod, the upper reversing rod exceeds the pneumatic cylinder body under the action of elastic pretightening force of the upper elastic piece and protrudes towards the direction of the pneumatic piston, and the upper reversing rod movably switches on and off of the air inlet and the second air guide pipe.

In one embodiment, the muffler assembly is further included and mounted to the exhaust port.

According to a second aspect of an embodiment of the present utility model, there is provided a hydraulic station comprising a hydraulic tank, an accumulator mounted to the hydraulic tank, a pressure stabilizing valve and a pneumatic hydraulic drive device as described above, the oil outlet of the pneumatic hydraulic drive device being connected to the accumulator by a conduit, the accumulator being connected to the pressure stabilizing valve.

The technical scheme provided by the embodiment of the utility model can comprise the following beneficial effects: the cylinder part is driven by taking high-pressure gas as energy, the high-pressure gas is stably provided by an air source, and the output stability is high. The oil cylinder assembly is driven by the reciprocating movement of the piston rod, and hydraulic oil flows into the second cavity from the second one-way valve under the action of pressure difference on two sides of the hydraulic piston and flows out from the first one-way valve, the first cavity and the oil outlet. The first one-way valve and the second one-way valve are arranged to be opened in one direction, and the pumping and hydraulic output of hydraulic oil are realized along with the reciprocating movement of the hydraulic piston, so that the pressure-bearing effect is good.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic diagram of a pneumatic-hydraulic drive device according to an exemplary embodiment.

FIG. 2 is a schematic cross-sectional structural view of a pneumatic-hydraulic drive device according to an exemplary embodiment.

Fig. 3 is a schematic cross-sectional structure of a pneumatic-hydraulic drive device according to an exemplary embodiment.

Fig. 4 is a schematic diagram of an exploded construction of a pneumatic-hydraulic drive device according to an exemplary embodiment.

Fig. 5 is a schematic structural view of a spool assembly according to an example embodiment.

Fig. 6 is a schematic structural view of a hydraulic station according to an exemplary embodiment.

In the figure, a cylinder part 10; a cylinder assembly 11; a pneumatic cylinder 111; a pneumatic control channel 1111; a slide hole 11111; step hole 11112; an air inlet 1112; an exhaust port 1113; a vent hole 1114; an air guide seat 1115; an oil outlet 1116; a pneumatic piston 112; a spool assembly 113; an air vent 1131; a first via 1132; a second via 1133; a sliding portion 1134; a piston portion 1135; a guide 1136; sealing ring 1137; an upper reversing valve 114; an upper reversing lever 1141; an upper elastic member 1142; a lower reversing valve 115; an upper pneumatic seat 116; a lower pneumatic seat 117; a first airway 118; a second air duct 119; a piston rod 12; a hydraulic piston 13; a piston main body 131; a seal 132; a first one-way valve 14; a cylinder assembly 20; a hydraulic cover 21; a second check valve 22; a hydraulic cylinder 23; a first cavity 231; a second chamber 232; a hydraulic oil tank 30.

Detailed Description

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, the present utility model provides a pneumatic-hydraulic driving apparatus including a cylinder part 10 and an oil cylinder assembly 20.

The cylinder part 10 comprises a cylinder assembly 11, a piston rod 12 telescopically movable in the cylinder assembly 11 and a hydraulic piston 13 mounted at the end of the piston rod 12, the hydraulic piston 13 being provided with at least one first non-return valve 14. The cylinder assembly 11 and the piston rod 12 form a gas rod mechanism, and the cylinder assembly 20 is mounted at the output end of the cylinder assembly 11. The first check valve 14 can be opened in a unidirectional direction in which the cylinder assembly 20 guides the oil toward the oil hole.

The cylinder assembly 20 includes a hydraulic cylinder 23 fixed to the cylinder assembly 11, a hydraulic cover 21 fixed to an end of the hydraulic cylinder 23, and a second check valve 22 mounted to the hydraulic cover 21. The hydraulic cylinder 23 has a tubular cylinder structure, the hydraulic cover 21 closes one end of the hydraulic cylinder 23, and the other end of the hydraulic cylinder 23 is sealed and fixed to the cylinder assembly 11.

The hydraulic piston 13 slides in the hydraulic cylinder 23 in a sealing manner and separates the hydraulic cylinder 23 to form a first cavity 231 and a second cavity 232, the first check valve 14 is communicated with the first cavity 231, the cylinder assembly 11 is provided with an oil outlet 1116 communicated with the first cavity 231, the first check valve 14 is opened unidirectionally from the second cavity 232 to the first cavity 231, and the second check valve 22 is opened unidirectionally from the hydraulic cover 21 to the second cavity 232.

In an alternative embodiment, the piston rod 12 has an oil guide hole extending from an end toward the cylinder assembly 11 and at least one through hole communicating with the oil guide hole, and the first check valve 14 is mounted to the oil guide hole. In another embodiment, the hydraulic piston 13 is provided with at least one oil guiding hole penetrating therethrough, the through hole is disposed at an output portion of the oil guiding hole, the oil guiding holes are distributed at intervals around the piston rod 12, and the first check valve 14 is mounted in the oil guiding hole.

The cylinder part 10 drives the cylinder part 10 by taking high-pressure gas as an energy source, the high-pressure gas is stably supplied by an air source, and the output stability is high, so that the problems of high power consumption and high cost caused by the adoption of electric energy for supplying power to a hydraulic station are solved. The cylinder assembly 20 is reciprocally driven by the piston rod 12, and hydraulic oil flows from the second check valve 22 into the second chamber 232 and out of the first check valve 14, the first chamber 231 and the oil outlet 1116 under the pressure differential across the hydraulic piston 13. Specifically, when the hydraulic piston 13 is retracted and moved toward the cylinder assembly 11, the first check valve 14 is closed, and the hydraulic oil in the first chamber 231 flows out along the oil outlet 1116; the second check valve 22 is opened and the external hydraulic oil enters the second chamber 232 along the second check valve 22. The hydraulic piston 13 extends and moves toward the second check valve 22, the second check valve 22 closes, the first check valve 14 opens, and hydraulic oil in the second chamber 232 enters the first chamber 231 along the first check valve 14. The cylinder part 10 thus drives the hydraulic piston 13 to reciprocate to achieve the pumping output. The first check valve 14 and the second check valve 22 are arranged to be opened in a one-way mode, and the pumping and hydraulic output of hydraulic oil are achieved along with the reciprocating movement of the hydraulic piston 13, so that the pressure-bearing effect is good.

The hydraulic piston 13 drives hydraulic oil to be output from the oil outlet 1116 in one direction, and the pumping pressure is controllable. The hydraulic piston 13 includes a piston main body 131 and a seal 132 attached to the piston main body 131, the seal 132 is provided with a seal lip protruding obliquely from the second chamber 232 toward the first chamber 231, the seal lip elastically abuts against a pipe wall of the seal hydraulic cylinder 23, and the first check valve 14 is attached to the piston main body 131. The seal 132 is fitted over the piston body 131 and closes to the body of the hydraulic cylinder 23. Wherein, the sealing lip inclines from the second cavity 232 to the first cavity 231, so that the pressure of the hydraulic oil output from the oil outlet 1116 is stable and cannot be hydraulic.

The second check valve 22 is arranged on the hydraulic sealing cover 21, and the hydraulic sealing cover 21 is connected with the hydraulic cylinder 23 in a plugging manner so as to realize high-precision positioning. Preferably, the hydraulic cover 21 includes a cylindrical body and a flange portion protruding from the cylindrical body, the flange portion being provided with a locking hole through which a fastener passes and is fixed to the hydraulic cylinder 23 body. The cylinder is inserted into the hydraulic cylinder 23, and a sealing structure is arranged at the joint part to form the sealing structure. Optionally, the second one-way valve 22 is a spring pushing against the steel column to abut against the closed oil hole to realize one-way closure.

The cylinder assembly 11 is configured as a high pressure gas driven structure, the cylinder assembly 11 being connected to a source of gas. In one embodiment, the cylinder assembly 11 includes a pneumatic cylinder 111, a pneumatic piston 112 sliding on the pneumatic cylinder 111, a valve core assembly 113 mounted on the pneumatic cylinder 111, an upper reversing valve 114, and a lower reversing valve 115, wherein the upper reversing valve 114 and the lower reversing valve 115 are relatively distributed at two ends of the pneumatic cylinder 111. The pneumatic piston 112 reciprocates in the pneumatic cylinder 111, wherein the pneumatic piston 112 is automatically switched after a single air source input by triggering the upper reversing valve 114 or the lower reversing valve 115.

The pneumatic cylinder 111 is provided with a pneumatic channel 1111, an air inlet 1112 and an air outlet 1113 which are communicated with the pneumatic channel 1111, the valve core assembly 113 slides in the pneumatic channel 1111, and the piston rod 12 is fixed on the pneumatic piston 112 and penetrates the pneumatic cylinder 111. The gas input from the gas inlet 1112 drives the pneumatic piston 112 to slide and controls the valve core assembly 113 to switch after the pneumatic piston 112 triggers the upper reversing valve 114 or the lower reversing valve 115, so that the pneumatic piston 112 is reciprocally switched. The pneumatic cylinder 111 is provided with an inlet 1112 and an outlet 1113, the inlet 1112 being connected to a gas source, the outlet 1113 being for discharging the gas. The pneumatic cylinder 111 realizes automatic in-place switching through the combination of the pneumatic control channel 1111, the upper reversing valve 114 and the lower reversing valve 115, and has good switching effect.

As shown in fig. 3 and 4, the pneumatic cylinder 111 includes an upper pneumatic seat 116, a lower pneumatic seat 117, and a piston cylinder having both ends connected to the upper pneumatic seat 116 and the lower pneumatic seat 117, respectively, and the pneumatic piston 112 slides on the piston cylinder and partitions the piston cylinder to form a third chamber and a fourth chamber, and the pneumatic control channel 1111 is connected to the third chamber through a vent hole 1114. The upper pneumatic seat 116 is provided with an air vent passage and the lower pneumatic seat 117 is provided with a reversing passage.

The pneumatic cylinder 111 includes a first air duct 118 communicating with the fourth chamber and the pneumatic control channel 1111, two ends of a second air duct 119 are respectively communicated with an upper reversing valve 114 and a lower reversing valve 115, and the valve core assembly 113 slides under the air pressure of the pneumatic control channel 1111 to control one of the air vent 1114 and the first air duct 118 to input air, and the other air vent outputs air.

After the pneumatic piston 112 triggers the upper reversing valve 114, the valve core assembly 113 is at the first position, the air inlet 1112 is communicated with the pneumatic control channel 1111 and the air vent 1114, and high-pressure air is input into the third cavity, and meanwhile, the first air duct 118 is communicated with the fourth cavity, the pneumatic control channel 1111 and the air vent 1113, so as to guide the air in the fourth cavity to be discharged through the pneumatic control channel 1111 and the air vent 1113, thereby pushing the pneumatic piston 112 to be in a posture of pushing out the piston rod 12. Conversely, after the pneumatic piston 112 triggers the lower reversing valve 115, the second air duct 119 drives the valve core assembly 113 to slide in the second position under the action of air pressure, and the valve core assembly 113 moves to the air inlet 1112, the pneumatic control channel 1111 and the first air duct 118 to be communicated with the fourth cavity, so as to guide the high-pressure air to enter the fourth cavity. At the same time, the valve core assembly 113 is positioned such that the third chamber, vent 1114, and vent 1113 are in communication such that the gas in the third chamber exits the vent to push the pneumatic piston 112 in a retracted position to the piston rod 12.

Specifically, the valve core assembly 113 includes a valve rod and a plurality of sealing rings 1137 sleeved on the valve rod, wherein the valve rod is provided with blind hole-shaped air guide holes 1131 and first and second through holes 1132 and 1133 communicated with the air guide holes 1131 from one end to the other end, and the first and second through holes 1132 and 1133 are distributed along the axial direction of the valve rod at intervals and are arranged at intervals through the sealing rings 1137. The valve rod slides along the axial direction of the air guide hole 1131, and the sealing ring 1137 is elastically sealed with the inner wall of the air control channel 1111 to separate and form different air flow channels. The sliding pressure of the valve rod is controlled by the second air duct 119 and the change of air pressure of the reversing channel. The first through hole 1132 and the second through hole 1133 correspond to the first position and the second position respectively, and as the valve rod is switched, single air source conveying is realized, and switching between air intake and ventilation is realized.

Specifically, the valve core assembly 113 moves to control the pneumatic piston 112 to form a retracted posture and an extended posture, wherein, in the retracted posture, the first through hole 1132 is correspondingly communicated with the first air duct 118, and the second through hole 1133 is blocked from the air vent 1114. In the extended posture, the first through hole 1132 is blocked corresponding to the first air duct 118, the second through hole 1133 is communicated with the air vent 1114, and the air inlet 1112 is connected to the air duct 1131.

In an embodiment, the pneumatic cylinder 111 includes an air guide seat 1115 mounted on the upper pneumatic seat 116, and the air guide seat 1115 is detachably connected to the upper pneumatic seat 116, so as to improve the convenience of processing the channels of the air guide seat 1115 and the upper pneumatic seat 116.

The pneumatic control channel 1111 is disposed on the upper pneumatic seat 116, the pneumatic control channel 1111 includes a sliding hole 11111 and a step hole 11112 coaxially disposed, and the aperture of the step hole 11112 is larger than that of the sliding hole 11111, so as to form pressure surfaces with different stress areas, and realize pneumatic pressure sliding switching.

The valve rod comprises a sliding part 1134 sliding in the sliding hole 11111, a piston part 1135 sliding in the step hole 11112 and a guide part 1136 protruding out of the piston part 1135, wherein the air guide hole 1131, the first through hole 1132 and the second through hole 1133 are distributed in the sliding part 1134, the air guide seat 1115 seals the step hole 11112 and is provided with an air guide channel communicated with the second air guide pipe 119 and the step hole 11112, and the guide part 1136 is inserted and slides in the air guide seat 1115. The piston portion 1135 is positioned within the stepped bore 11112, and the air guide 1115 and the stepped bore 11112 define a piston space for pneumatic switching of the valve stem by sliding the piston portion 1135. The second air duct 119 pneumatically switches the air entering the piston chamber through the upper reversing valve 114 and the lower reversing valve 115 to achieve pneumatic reversing.

As shown in fig. 1 to 5, in an embodiment, the upper reversing valve 114 includes an upper reversing lever 1141 and an upper elastic member 1142 elastically abutting against the upper reversing lever 1141, the upper reversing lever 1141 exceeds the pneumatic cylinder 111 under the elastic pre-tightening force of the upper elastic member 1142 and protrudes toward the pneumatic piston 112, and the upper reversing lever 1141 movably switches on/off of the air inlet 1112 and the second air duct 119. The upper elastic member 1142 pushes the upper reversing lever 1141 to elastically stretch and retract, so that the air piston 112 can push the upper reversing lever 1141 to compress the upper elastic member 1142 in a range of moving to the upper reversing lever 1141, so as to realize the air path on-off control of the air inlet 1112 and the second air duct 119.

Based on the same principle, the lower reversing valve 115 includes a lower reversing lever and a lower elastic member elastically abutting against the lower reversing lever, and the lower reversing member protrudes beyond the pneumatic cylinder 111 and toward the pneumatic piston 112 under the elastic pre-tightening force of the lower elastic member.

Further, the pneumatic-hydraulic drive device further includes a muffler assembly mounted to the exhaust 1113 to reduce noise in the working environment.

As shown in fig. 1 and 6, the pneumatic-hydraulic driving apparatus disclosed in the above embodiment is applied to a hydraulic station including a hydraulic tank 30, an accumulator mounted to the hydraulic tank 30, a pressure stabilizing valve, and the pneumatic-hydraulic driving apparatus as described above, an oil outlet 1116 of the pneumatic-hydraulic driving apparatus is connected to the accumulator through a conduit, and the accumulator is connected to the pressure stabilizing valve. The hydraulic tank 30 may store hydraulic oil, and the cylinder assembly 20 may be at least partially immersed in the hydraulic oil to one-way withdraw the hydraulic oil through the second check valve 22 at the end. The hydraulic oil is pressurized by the cylinder assembly 20 and then is output after being stabilized by the pipelines such as an energy accumulator, a pressure stabilizing valve and the like through the oil outlet 1116, so that continuous supply is realized. The hydraulic station adopts single gas circuit control, can realize high-pressure gas driving, and reduces operation cost and electric energy consumption.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. A pneumatic hydraulic drive, comprising:

2. A pneumatic-hydraulic drive as set forth in claim 1 wherein said hydraulic piston includes a piston body and a seal mounted to said piston body, said seal being provided with a sealing lip projecting obliquely from said second chamber toward said first chamber, said sealing lip being in resilient abutment against a wall of said hydraulic cylinder, said first check valve being mounted to said piston body.

3. A pneumatic-hydraulic drive as claimed in claim 1, wherein the hydraulic cover is in plug-in connection with the hydraulic cylinder.

4. The pneumatic-hydraulic driving device according to claim 1, wherein the cylinder assembly comprises a pneumatic cylinder body, a pneumatic piston sliding on the pneumatic cylinder body, a valve core assembly installed on the pneumatic cylinder body, an upper reversing valve and a lower reversing valve, the upper reversing valve and the lower reversing valve are relatively distributed on two ends of the pneumatic cylinder body, the pneumatic cylinder body is provided with a pneumatic control channel, an air inlet and an air outlet communicated with the pneumatic control channel, the valve core assembly slides on the pneumatic control channel, the piston rod is fixed on the pneumatic piston and penetrates out of the pneumatic cylinder body, and gas input from the air inlet drives the pneumatic piston to slide and controls the valve core assembly to switch after the pneumatic piston triggers the upper reversing valve or the lower reversing valve so as to enable the pneumatic piston to switch and move reciprocally.

5. The pneumatic-hydraulic driving device according to claim 4, wherein the pneumatic cylinder body comprises an upper pneumatic seat, a lower pneumatic seat, a piston cylinder, a first air duct and a second air duct, wherein two ends of the piston cylinder are respectively connected with the upper pneumatic seat and the lower pneumatic seat, the pneumatic piston slides in the piston cylinder and separates the piston cylinder to form a third cavity and a fourth cavity, the first air duct is communicated with the fourth cavity and the pneumatic control channel, the pneumatic control channel is connected with the third cavity through an air vent, two ends of the second air duct are respectively communicated with the upper reversing valve and the lower reversing valve, one of the air vent and the first air duct is slidingly controlled by the air pressure of the pneumatic control channel to input gas, and the other one of the air vent and the first air duct outputs gas.

6. The pneumatic hydraulic driving device according to claim 5, wherein the valve core assembly comprises a valve rod and a plurality of sealing rings sleeved on the valve rod, blind hole-shaped air guide holes, first through holes and second through holes communicated with the air guide holes are formed in the valve rod from one end to the other end, the first through holes and the second through holes are distributed at intervals along the axial direction of the valve rod and are arranged at intervals through the sealing rings, the valve core assembly moves to control the pneumatic piston to form a retraction posture and an extension posture, and the first through holes are correspondingly communicated with the first air guide holes and the second through holes are blocked with the air holes in the retraction posture; when the air inlet is connected to the air guide hole, the first air guide hole is correspondingly blocked with the first air guide pipe, the second air guide hole is communicated with the air vent, and the air inlet is connected to the air guide hole.

7. The pneumatic-hydraulic driving device according to claim 6, wherein the pneumatic cylinder body comprises an air guide seat mounted on the upper pneumatic seat, the air control channel comprises a sliding hole and a step hole which are coaxially arranged, the valve rod comprises a sliding part sliding in the sliding hole, a piston part sliding in the step hole and a guide part protruding out of the piston part, the air guide hole, the first through hole and the second through hole are distributed in the sliding part, the air guide seat seals the step hole and is provided with an air guide channel communicated with the second air guide pipe and the step hole, and the guide part is inserted and slid on the air guide seat.

8. The pneumatic-hydraulic driving device according to claim 5, wherein the upper reversing valve comprises an upper reversing rod and an upper elastic member elastically abutting against the upper reversing rod, the upper reversing rod exceeds the pneumatic cylinder body under the action of the elastic pretightening force of the upper elastic member and protrudes towards the pneumatic piston, and the upper reversing rod movably switches the on-off of the air inlet and the second air duct.

9. The pneumatic-hydraulic drive of claim 4, further comprising a muffler assembly mounted to the exhaust port.

10. A hydraulic station comprising a hydraulic tank, an accumulator mounted to the hydraulic tank, a pressure regulating valve and a pneumatic hydraulic drive as claimed in any one of claims 1 to 9, the oil outlet of the pneumatic hydraulic drive being connected to the accumulator by a conduit, the accumulator being connected to the pressure regulating valve.