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CN-224214468-U - Valve block for electrohydraulic integrated push rod

CN224214468UCN 224214468 UCN224214468 UCN 224214468UCN-224214468-U

Abstract

The utility model discloses a valve block for an electrohydraulic integrated push rod, which comprises a valve block main body and a PLC (programmable logic controller), wherein the front end of the valve block main body is provided with a threaded joint which is in threaded connection with the inner wall of an oil tank inner cavity, the valve block main body and the threaded joint are provided with motor shaft through holes through which a motor shaft passes, the end surface of the threaded joint is provided with an oil inlet which is communicated with an oil suction pipe on the side wall of the oil tank main body, the end surface of the valve block main body is provided with an oil passing port which is communicated with the oil tank oil conveying pipe, and the oil inlet and the oil passing port are respectively connected through the valve block oil conveying pipe arranged on the valve block main body.

Inventors

  • LIANG LIWEI
  • WANG JUNLONG
  • TONG YUPAN

Assignees

  • 石家庄市液压有限责任公司

Dates

Publication Date
20260508
Application Date
20250623

Claims (9)

  1. 1. A valve block for an electrohydraulic integrated push rod is characterized by comprising a valve block main body (2200) and a PLC, wherein a threaded joint (2201) in threaded connection with the inner wall of an oil tank inner cavity (2301) is arranged at the front end of the valve block main body (2200), a motor shaft through hole (2202) through which a motor shaft passes is formed in the threaded joint (2201), an oil inlet (2203) communicated with an oil suction pipe on the side wall of the oil tank main body is formed in the end face of the threaded joint (2201), an oil passing port (2204) communicated with the oil tank oil conveying pipe is formed in the end face of the valve block main body (2200), and the oil inlet (2203) and the oil passing port (2204) are connected through valve block oil conveying pipes (2207) arranged on the valve block main body (2200) respectively.
  2. 2. The valve block for an electro-hydraulic integrated push rod of claim 1, wherein an overflow pipeline (2208) is further arranged in the valve block main body (2200), and the overflow pipeline (2208) is communicated with an oil tank inner cavity (2301).
  3. 3. The valve block for an electro-hydraulic integrated push rod of claim 1, wherein a pressure sensor (2205) and a hydraulic joint (2206) are mounted on the top end surface of the valve block main body (2200), and an output end of the pressure sensor (2205) is connected with an input end of a PLC.
  4. 4. The valve block for the electro-hydraulic integrated push rod, as set forth in claim 1, is characterized in that a second one-way valve (2213), a third overflow valve (2214), a second hydraulic one-way valve (2215) and a third hydraulic one-way valve (2216) are installed on the front side surface of the valve block main body (2200), controlled ends of the second one-way valve (2213), the third overflow valve (2214), the second hydraulic one-way valve (2215) and the third hydraulic one-way valve (2216) are respectively connected with an output end of the PLC, a first overflow valve (2209), a first one-way valve (2210), a second overflow valve (2211) and a first hydraulic one-way valve (2212) are installed on the rear side surface of the valve block main body (2200), and controlled ends of the first overflow valve (2209), the first one-way valve (2210), the second overflow valve (2211) and the first hydraulic one-way valve (2212) are respectively connected with the output end of the PLC.
  5. 5. The valve block for the electro-hydraulic integrated push rod, as set forth in claim 4, wherein an oil inlet of the first one-way valve (2210) is communicated with an oil tank cavity (2301), an oil outlet of the first one-way valve (2210) is communicated with a left oil inlet of the bidirectional gear pump (2102), a left oil outlet of the bidirectional gear pump (2102) is communicated with a left oil flow path, the left oil flow path is composed of a left valve block oil delivery pipe (2207) in the valve block, a left oil tank oil delivery pipe and a left long oil pipe in the hydraulic cylinder, and the second overflow valve (2211) is arranged on a left overflow pipe (2208) which is communicated with the left oil flow path and the oil tank cavity (2301).
  6. 6. The valve block for the electro-hydraulic integrated push rod, as set forth in claim 4, is characterized in that an oil inlet of the second one-way valve (2213) is communicated with an oil tank inner cavity (2301), an oil outlet of the second one-way valve (2213) is communicated with a right oil inlet of the bidirectional gear pump (2102), a right oil outlet of the bidirectional gear pump (2102) is communicated with a right oil flow path, the right oil flow path is composed of a right valve block oil conveying pipe (2207), a right oil tank oil conveying pipe and a right short oil pipe inside the hydraulic cylinder, and the second one-way valve (2215) and the third one-way valve (2216) are sequentially arranged on the right oil flow path.
  7. 7. The valve block for an electro-hydraulic integrated push rod of claim 6, wherein the first relief valve (2209) is disposed on a right high-pressure relief line (2208) that communicates a right oil flow path with an inner cavity (2301) of the oil tank, and the right high-pressure relief line (2208) is disposed on a right oil flow path located at a front end of the third pilot operated check valve (2216) along an oil delivery direction.
  8. 8. The valve block for an electro-hydraulic integrated pushrod according to claim 6, wherein the third overflow valve (2214) is disposed on a right low-pressure overflow line (2208) that communicates a right oil flow path with an oil tank cavity (2301), and the right low-pressure overflow line (2208) is disposed on a right oil flow path near a right oil outlet of the bi-directional gear pump in an oil delivery direction.
  9. 9. The valve block for an electro-hydraulic integrated push rod of claim 6, wherein the right oil flow path is communicated with an inner cavity (2301) of the oil tank through a branch pipe, the first hydraulic control one-way valve (2212) is arranged on the branch pipe, and the branch pipe is arranged on the front side of a right low-pressure overflow pipeline (2208) along the oil conveying direction.

Description

Valve block for electrohydraulic integrated push rod Technical Field The utility model relates to the technical field of electro-hydraulic push rods, in particular to a valve block for an electro-hydraulic integrated push rod. Background The electrohydraulic push rod is a hydraulic driving manipulator integrating machine, electricity and liquid into a whole, and is suitable for reciprocating push-pull linear reciprocating rotation with a certain angle. In the using process of the electro-hydraulic push rod, the servo motor is controlled to rotate positively and reversely, so that the bidirectional gear pump is driven to output pressure oil positively and negatively, the pressure oil is sent to the oil cylinder through the hydraulic control valve, the reciprocating motion of the piston rod of the oil cylinder is realized, and the basic working mode of the electro-hydraulic push rod is further realized. However, because the existing hydraulic control valve and the bidirectional gear pump are arranged inside the oil tank, the whole oil tank assembly needs to be removed when the hydraulic control valve is maintained, and then the hydraulic control valve is maintained, so that the disassembly and maintenance are inconvenient. Disclosure of utility model The utility model aims to solve the technical problem of providing a valve block for an electrohydraulic integrated push rod, which can realize split connection of the valve block and a bidirectional gear pump and oil tank assembly and is convenient for maintenance and replacement of the valve block independently. In order to solve the technical problems, the technical scheme adopted by the utility model is as follows. The valve block for the electro-hydraulic integrated push rod comprises a valve block main body and a PLC (programmable logic controller), wherein the front end of the valve block main body is provided with a threaded joint in threaded connection with the inner wall of an oil tank inner cavity, motor shaft through holes for a motor shaft to pass through are formed in the valve block main body and the threaded joint, an oil inlet communicated with an oil suction pipe on the side wall of the oil tank main body is formed in the end face of the threaded joint, an oil passing port communicated with an oil tank oil conveying pipe is formed in the end face of the valve block main body, and the oil inlet and the oil passing port are connected through the valve block oil conveying pipe arranged on the valve block main body. Above-mentioned valve piece for integrated push rod of electricity liquid, valve piece main part is inside still to be provided with overflow pipeline, overflow pipeline and oil tank inner chamber intercommunication. Above-mentioned valve piece for integrated push rod of electrohydraulic, pressure sensor and hydraulic joint are installed to the top face of valve piece main part, and pressure sensor's output is connected with the input of PLC controller. The valve block for the electro-hydraulic integrated push rod is characterized in that a second one-way valve, a third overflow valve, a second hydraulic one-way valve and a third hydraulic one-way valve are arranged on the front side surface of a valve block main body, the controlled ends of the second one-way valve, the third overflow valve, the second hydraulic one-way valve and the third hydraulic one-way valve are respectively connected with the output end of a PLC (programmable logic controller), a first overflow valve, a first one-way valve, a second overflow valve and a first hydraulic one-way valve are arranged on the rear side surface of the valve block main body, and the controlled ends of the first overflow valve, the first one-way valve, the second overflow valve and the first hydraulic one-way valve are respectively connected with the output end of the PLC. The valve block for the electro-hydraulic integrated push rod is characterized in that an oil inlet of the first one-way valve is communicated with an inner cavity of an oil tank, an oil outlet of the first one-way valve is communicated with a left oil inlet of a bidirectional gear pump, a left oil outlet of the bidirectional gear pump is communicated with a left oil flow path, the left oil flow path consists of a left valve block oil delivery pipe in the valve block, a left oil tank oil delivery pipe and a left long oil pipe in the hydraulic cylinder, and the second overflow valve is arranged on a left overflow pipe for communicating the left oil flow path with the inner cavity of the oil tank. The valve block for the electro-hydraulic integrated push rod is characterized in that an oil inlet of the second one-way valve is communicated with an inner cavity of an oil tank, a right oil inlet of an oil outlet two-way gear pump of the second one-way valve is communicated with a right oil flow path, the right oil outlet of the two-way gear pump is communicated with a right oil flow path, the right oil flow path is formed by a