Rotary valve and dual-cylinder pumping equipment
A rotary valve and pumping technology, which is applied in the hydraulic field, can solve the problems of rotary valve adjustment electrical relationship, etc., and achieve the effect of reducing operation steps, simple operation, and fewer oil circuits
Active Publication Date: 2014-12-24
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0004] The present invention aims to provide a rotary valve and double-cylinder pumping equipment to solve the problem of needing to adjust the electrical relationship when the rotary valve is used in the prior art
Method used
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[0046] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0047] As a first aspect of the present invention, a rotary valve is provided. Such as Figure 1-22 As shown, the rotary valve includes: a first part 100, the first part 100 includes an oil inlet port 111, an oil return port 112, a first outer oil port 113, a second outer oil port 114, a third outer oil port 115 and a fourth outer oil port The oil port 116; the second part 200, the second part 200 is rotatably connected with the first part 100; the rotary valve also includes a first rotational position and a second rotational position; in the first rotational position, the oil inlet 111 is connected to the first outer The oil port 113 is connected; the second external oil port 114 is connected with the fourth external oil port 116; the third external...
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The invention provides a rotary valve and dual-cylinder pumping equipment. The rotary valve comprises a first part and a second part, wherein the first part comprises an oil inlet, an oil return port, a first outer oil port, a second outer oil port, a third outer oil port and a fourth outer oil port; the second part is rotatably connected with the first part; the rotary valve further comprises a first rotating position and a second rotating position; the oil inlet is connected with the first outer oil port at the first rotating position; the second outer oil port is connected with the fourth outer oil port; the third outer oil port is connected with the oil return port; the oil inlet is connected with the fourth outer oil port at the second rotating position; the third outer oil port is connected with the first outer oil port; and the second outer oil port is connected with the oil return port. According to the invention, the second part is only rotated in the whole switching process, the other electric control and coordination are not required, the operating steps are reduced, and operation is very simple. In addition, the rotary valve and the dual-cylinder pumping equipment, provided by the invention, have the characteristics of few oil passages and smaller pressure loss.
Description
technical field [0001] The invention relates to the field of hydraulic pressure, and more specifically, relates to a rotary valve and double-cylinder pumping equipment. Background technique [0002] The pumping cylinder in a double-cylinder pumping equipment (such as a concrete pump truck) has a high-pressure pumping state and a low-pressure pumping state. In the prior art, the following three methods are usually used to switch between high and low pressure pumping states: [0003] (1) The high and low pressure conversion is realized by replacing the rubber hose, which has the disadvantages of high operating intensity, large oil leakage during operation, and easy to cause foreign pollutants to enter the system. (2) High and low pressure switching is realized through six cartridge valves and an electromagnetic reversing valve, which has the disadvantages of high cost, complex system, and high failure rate. (3) Change the connection relationship of the oil circuit through th...
Claims
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IPC IPC(8): F15B13/02F15B13/06
Inventor 裴杰
Owner ZOOMLION HEAVY IND CO LTD