Prestressed intelligent circulation grouting system and its control method
A control method and prestressing technology, applied in the processing of building materials, construction, bridge construction, etc., can solve problems such as the decrease of effective prestressing, accelerated corrosion of steel strands, weakening of the bonding force of reinforcement bars, etc., and achieve stable pressure. , The grouting is dense and the quality of the components is good.
A control method and prestressing technology, applied in the processing of building materials, construction, bridge construction, etc., can solve problems such as the decrease of effective prestressing, accelerated corrosion of steel strands, weakening of the bonding force of reinforcement bars, etc., and achieve stable pressure. , The grouting is dense and the quality of the components is good.
CN104074143BActive Publication Date: 2018-03-09柳州市桥厦科技发展有限公司
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[0029] Such as figure 1 As shown, the prestressed intelligent circulation grouting system of the present invention includes a high-speed mixer 2, an electric control box 7, a low-speed pulp storage tank 5, a grouting pump 6, a pressure sensor 12, an electromagnetic flowmeter 11 at a pulp inlet, and a pulp outlet Electromagnetic flowmeter 14, water inlet valve 3, load cell 1, air compressor, slurry inlet pressure maintaining device 10, slurry outlet pressure maintaining device 15, set in the grouting pipeline between the grouting pump and the grouting inlet There is a pressure compensating device 8, and the pressure compensating device 8 includes a piston 18 and an elastic force mechanism, the end of the piston 18 communicates with the grouting pipeline, and the elastic force of the elastic force mechanism drives the end of the piston to press into the grouting pipeline.
[0030] Such as figure 2 As shown, the elastic force mechanism includes a spring 17 arranged in the pisto...
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A prestressed intelligent circulating grouting system and its control method, the grouting pipeline between the grouting pump and the grouting port is provided with a pressure compensation device, the pressure compensating device includes a piston and an elastic mechanism, and the piston end The head is connected with the grouting pipeline, and the elastic force of the elastic mechanism is to drive the piston end to press into the grouting pipeline; the pressure maintaining devices are respectively installed at the slurry inlet and the slurry outlet, and respectively control the amount of slurry entering the channel of the beam member and the discharge The amount of slurry in the channel of the beam member; the electromagnetic flowmeter is respectively installed at the slurry inlet and the slurry outlet to measure the flow signals of the slurry inlet and the slurry outlet; The grouting action, the water-cement ratio control step adopts closed-loop control, and the effective cycle pressure value is set; the holding pressure value: the lower limit value of the holding pressure; the upper limit value of the holding pressure; the holding time value controls the component slurry control. Its advantages are stable slurry pressure, compact grouting and good component quality.
Description
technical field [0001] The invention relates to the technical field of prestressed engineering, in particular to a prestressed intelligent circulation grouting system and a control method thereof. Background technique [0002] During bridge construction, the quality of prestressed grouting construction is crucial to the safety and durability of prestressed bridges, so post-tensioning prestressed pipeline grouting construction has become a key process in prestressed bridge construction. [0003] Chinese patent CN103711315 discloses a patent titled "Intelligent Vacuum Circulation Grouting System". In order to solve the problem of unstable grouting quality in traditional grouting systems, this patent adopts a technical scheme of setting a program-controlled three-way valve in the grout return pipe. The quality of grouting, but because the pressure of the grout changes during the transmission process, the grouting quality at some positions of the grout is unstable. [0004] Chi...
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Patent Timeline
09 Mar 2018
Publication
CN104074143B
- IPC
- E01D21/00; E04G21/12
- Inventors
- 姚永湖; 杨国林