Electro-hydraulic mix-drive sand mixing equipment

Abstract

The invention discloses electro-hydraulic mix-drive sand mixing equipment. The equipment comprises a skid seat, motors, a hydraulic pump. a discharge centrifugal pump, a suction centrifugal pump, a mixing tank, a dry adding system, a liquid adding system and a sand conveying auger system; the motors, the hydraulic pump, the discharge centrifugal pump, the suction centrifugal pump, the mixing tank,the dry adding system, the liquid adding system and the sand conveying auger system are integrated and arranged on the skid seat in a skid-mounting mode; two motors are arranged and comprise a firstmotor and a second motor; the first motor drives the discharge centrifugal pump; and the second motor drives the hydraulic pump, so as to drive the suction centrifugal pump, the mixing tank, the dry adding system, the liquid adding system and the sand conveying packing auger system, wherein the motors are variable-frequency integrated motors. The equipment has the beneficial effects that through application of the two variable-frequency integrated motors, firstly, arrangement of an independent variable frequency cabinet is effectively reduced, so that the overall size of the sand mixing equipment is effectively compressed, and transportation and well site arrangement of equipment are more flexible and convenient; and secondly, the control system is more concise, and power matching of the sand mixing equipment is optimized.

Description

technical field [0001] The invention relates to the field of oil and gas field fracturing operation equipment, in particular to an electro-hydraulic mixing driven sand mixing equipment. Background technique [0002] In China's oil and gas field fracturing operations, the configuration of the power transmission system used in the sand mixing equipment is that the diesel engine drives the hydraulic system through the transfer case, and the executive components such as suction centrifugal pump, discharge centrifugal pump, auger, liquid filling system, The dry adding system etc. are all driven by hydraulic motors. [0003] This configuration mode has the following disadvantages: [0004] (1), large volume and complex structure: [0005] The diesel engine system includes air intake system, exhaust system, heating system, fuel system, cooling system, etc., with complex structure and large space occupation; [0006] (2) Not environmentally friendly: During the operation of the d...

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Problems solved by technology

[0004] (1), large volume and complex structure:

[0005] The diesel engine system includes air intake system, exhaust system, heating system, fuel system, cooling system, etc., with complex structure and large space occupation;

[0006] (2) Not environmentally friendly: During the operation of the diesel engine-driven sand mixing equipment at the well site, engine exhaust gas pollution and noise pollution will be generated, seriously affecting the normal life of the surrounding residents. At the same time, there are risks of leakage of fuel, engine oil, antifreeze, etc. , will cause a certain degree of pollution to the environment

[0007] (3) Uneconomical: For sand mixing equipment driven by diesel engines, the initial purchase cost of the equipment is relatively high, the fuel consumption per unit power is high when the equipment is running, and the daily maintenance costs of the power system are also high

[0008] In view of the fact that China's oil and gas development equipment is developing in the direction of "low energy consumption, low noise, and low emission", the above-mentioned shortcomings of traditional sand mixing equipment powered by diesel engines have hindered the development of unconventional oil and gas energy to a certain extent. development process

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