1 Brief Introduction

Nowadays, hydraulic system is widely used in various industries all kinds of mechanical equipment. As a transmission technology, the hydraulic mode has the following advantages over the traditional mechanical mode: 1 It makes a lot of force, and it's easy to control; 2 It can be infinitely variable in a wide range; 3 It is easy to prevent overload and has high safety; 4 Small size, large output, installation position can be freely selected; 5 The control of output force is simple and accurate and can be controlled remotely. Although the hydraulic system has the above advantages, the automatic reciprocation problem of the system has not been effectively and reliably solved. In many of the equipment in many industries, such as geological drilling rig in the mud pump, high pressure pump in seawater desalination equipment, high-rise building fire pump and so on, these devices need continuous output high pressure and large flow rate of fluid, due to not solve the problem of hydraulic system of automatic reciprocating, still adopts the traditional mechanical method, causes the bulky equipment, energy consumption and low efficiency. The project "hydraulic automatic reciprocating cylinder" is a national utility model patent, which successfully solves the automatic reciprocating problem of the hydraulic system and makes the adoption of hydraulic technology for the above equipment a reality. This technology is the main actuator of the hydraulic system - cylinder redesign, auxiliary with external control valve, the automatic reciprocation of the cylinder, and reliable work, simple structure, low cost.

2 Range of application

1. The existing mud pump of the hydraulic slurry pump of geological drilling is driven by a motor to drive the crankshaft and connecting rod to push the piston to output mud. This structure has been used for many years, the technology is backward, so that the volume of the mud pump is huge, output mud pressure fluctuations, flow instability, and the maximum power of the mud pump is limited, the general pressure can only reach 3 ~ 4Mpa, flow is not easy to do a lot. The hydraulic mud pump manufactured by this patented technology has the volume of mud pump only 1/2 to 1/3 of the existing mud pump at the same output power, and the energy consumption is about 80% of the existing mud pump. Although the manufacturing cost is slightly increased, there is no power limit in the design of the hydraulic mud pump, the output pressure can reach dozens of Mpa, the flow rate can be unlimited expansion, and the output pressure, flow rate is stable. 2. Reverse osmosis technology is an efficient and large-scale seawater desalination technology adopted by hydraulic high-pressure pump for seawater desalination, which has a broad application prospect in today's water shortage. High pressure pump is key equipment in the application of reverse osmosis seawater desalination technology. The existing high pressure pump is basically mechanical structure. Common types of pumps are single-stage, high-speed centrifugal pump, plunger pump and multi-stage centrifugal pump. Generally, single-stage centrifugal pump efficiency is the lowest; plunger pump efficiency is the highest, in the large system, the use of multi-stage centrifugal pump. In China, there is no professional manufacturer of seawater desalination high-pressure pump. The main reason is: to make high pressure pump to achieve high efficiency, must make some important parts to achieve high machining accuracy, which requires very professional, expensive processing equipment and a lot of processing costs. Therefore, the import of high pressure pump price is very high. Hydraulic automatic reciprocating cylinder high pressure pump, compared with mechanical high pressure pump, plunger pump work efficiency is greatly improved, high power is easy to achieve. The greater the power of the pump, the lower the production cost, the greater the price decline compared with similar imported products. 3. High-pressure cleaning equipment. 4. In summary, the automatic reciprocating hydraulic system for the water supply (fire pump) of high rise buildings has broadened the application range of hydraulic system, so that the hydraulic system can be brought into full play with high efficiency, flexibility, high power and low cost, which will bring great economic benefits and social benefits to the enterprise after application.