CN2549510Y

CN2549510Y - Liquid pressure stabilizer

Info

Publication number: CN2549510Y
Application number: CN 02264975
Authority: CN
Inventors: 朱家顺
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-21
Filing date: 2002-06-21
Publication date: 2003-05-07
Anticipated expiration: 2012-06-21

Abstract

The utility model relates to a liquid pressure stabilizer which is used for stabilizing the output pressure of the medium arranged in a pressure vessel. The utility model comprises a transducer. The output frequency of the transducer is controlled and set by a computer and a programmable controller PLC. An electric machine is used for receiving the output frequency; the utility model is characterized in that the liquid pressure stabilizer drives a water pump to input the pulsation liquid to a stabilizing device which has a grid type air chamber, and then gas produced by the liquid under the action of pressure is released through an overflow valve which is arranged in an air overflow pipe, the gas compressed in the air chamber is stretchy, thereby functioning as a stored energy machine to eliminate the pulsation. The liquid with higher pressure in the pulsation is drained from the overflow valve again, thereby having the function of eliminating part of low frequency impulse; therefore, the utility model can output the hydrostatic pressure without pulsation and achieve the aim of pressure stabilizing. The utility model has the advantages of low cost, high operating reliability, low energy consumption, short adjusting time as well as convenient and automated control, etc.

Description

Liquid pressure stabilizer

Technical field

The utility model relates to the stable-pressure device that output pressure carries out voltage stabilizing in the liquid pressure container.

Background technology

When having degree of precision to require to output pressure stable when equipment work, will carry out voltage stabilizing to the medium in the pressure vessel, liquid pressure stabilizer is exactly a kind of new mode of the output pressure of the medium in the pressure vessel being carried out voltage stabilizing.At present in the industrial circle particularly the fluid detection field all adopt the pressurized air voltage-regulating system that constitutes a closed loop by air compressor, gas-holder, variable valve to control the output pressure of pressurizing vessel, its voltage stabilizing gas-holder can only be arranged vertically, it is big to make jumbo gas-holder difficulty, this control technology has following deficiency: a. cost height, because system only just need purchase air compressor, gas-holder, variable valve for voltage stabilizing, and must possess the longer pipe road and put the place, this has just increased the cost of equipment; B. the adjusting time long, generally speaking, because the flow of the fluid of output is changing, at this moment the air handling system of closed loop is just regulated pressure automatically, experimental results show that sometimes these adjustment process need 15 minutes; C. reliability is low, owing to increased the pressurized air voltage-regulating system, by probability statistics as can be known, the operational reliability of its entire equipment will descend in varying degrees; D. energy consumption height, pump are in operation and remove the flow that guarantees output, also need overcome the resistance that the pressurized air regulating system is produced, and have increased energy consumption.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the defective of prior art and the liquid pressure stabilizer that a kind of reliability height, energy consumption are low, the adjusting time short, cost reduces greatly is provided.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: liquid pressure stabilizer, it comprises by motor-driven water pump, water pump one termination pond, one end connects pressurizing vessel through water inlet pipe, the pressurizing vessel top connects run-down pipe, surplus valve is serially connected in the run-down pipe, and the side is connected to rising pipe, it is characterized in that described motor input end is connected to the frequency converter of control output frequency; Be provided with the air chamber that constitutes by grid in the described pressurizing vessel, the pressure stability mechanism that constitutes by frequency converter and the pressurizing vessel that has a grid-like air chamber.

The input end of described frequency converter is connected with computing machine and the variable program controller PLC of setting the frequency converter output frequency.

Between the described air chamber grid apart from the L=50-300 millimeter.

The relation of described air chamber grid length H and pressurizing vessel diameter D is H=(1/4-3/4) D.

The utility model is owing to adopted frequency control and natural air chamber to carry out voltage stabilizing, guarantee the requirement of stablizing and satisfy delivery rate of output pressure, cancelled the pressurized air voltage-regulating system of closed loop, reduced the pressure regulation link, so reduced cost, improved the operational reliability of equipment, natural air chamber does not have any moving element, its failure rate is almost nil, and frequency converter generally can reach 8 years non-fault under the situation of working 8 hours every day, and this is first; Secondly,, need not to overcome the resistance that the pressurized air regulating system is produced, reduced energy consumption, and do not had the starting overload current, so energy consumption is low because the design is the principle according to the pressure=resistance of fluid; The 3rd, present technique is the delivery rate that changes pump by the incoming frequency of control motor, has reliable and stable characteristics, and generally the adjusting time is no more than 1 minute, and the spacing of grid is little, has shortened the fluctuation time, so the adjusting time is short; The 4th, the voltage stabilizing of present technique changes hour in output, the generalized case lower chamber can rely on the elasticity of air in the body just can reach the effect of voltage stabilizing, when output changes greatly, as long as the output frequency of control of conversion device is just passable, and frequency converter to computerized control be very easily, so present technique is convenient to robotization control; The 5th, pressurizing vessel can be made horizontal, has reduced jumbo manufacture difficulty; The 6th, the surplus valve of pressurizing vessel top is discharged the gas in the liquid, plays the effect of eliminating the part low-frequency pulse simultaneously.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A cut-open view of Fig. 1.

Embodiment

In conjunction with above-mentioned accompanying drawing embodiment the utility model is described in further detail.

Shown in Fig. 1-2, the computing machine 1 of liquid pressure stabilizer, variable program controller PLC 2, frequency converter 3, motor 4 is with

pilot

14,15 are connected in series successively, motor output shaft links to each other with water pump 5 input shafts through shaft coupling, water pump one end is water-accepting tank 13 by the road, one end connects pressurizing vessel 7 with water inlet pipe 6, the top of pressurizing vessel connects run-down pipe 9, surplus valve 8 is serially connected in the run-down pipe, the side picks out water pipe 12, be provided with the grid 10 that is welded on container inner wall in parallel in the pressurizing vessel and form a natural air chamber 11, when inside diameter of vessel D=3000 millimeter, the spacing of grid is selected the L=75 millimeter for use, and grid length is selected the H=2000 millimeter for use.The selection of inside diameter of vessel D, grid spacing L, grid length H is decided according to the amount of capacity of fluid output, and concerning high capacity output, corresponding D, L, H must select more greatly.

The utility model is by the requirement of output pressure and flow, can on frequency converter 3, directly set output frequency or pass through computing machine 1 is set frequency converters through variable program controller PLC 2 output frequency, the output frequency that motor 4 is just pressed frequency converter drives water pump 5 rotations, water pump pumps the liquid in the pond 13 pressurizing vessel 7 that is full of air by water inlet pipe 6 inputs, make the interior air of pressurizing vessel by discharging in rising pipe 12 and the run-down pipe 9, because the outside of the grid 10 in the natural air chamber 11 and the inwall of container seal, and the air in the air chamber can't be discharged.Air pressure when feed liquor body not in the air chamber is a normal pressure, and communicate with other positions of container, and after liquid entered, liquid level rose the air in air chamber compression gradually and has cut off the path at air chamber and other positions, and the interior pressure of air chamber equates with the pressure of the input pod of liquid all the time.Because of the liquid that pump is exported is pulsed, and compressed air is resilient in the air chamber, and this has just played accumulator and has eliminated the effect of pulsing.Simultaneously the air and the effect of the liquid air of under pressure condition, discharging of run-down pipe in amount discharge container, the characteristics that the fluid that liquid is discharged in identical gap in the time of can also utilizing pressure surge can change (otherwise the high delivery flow of pressure is big then little), the fluid of pressure when higher in the pulsation discharged from run-down pipe, thereby reach the purpose of voltage stabilizing.

Claims

1. liquid pressure stabilizer, it comprises the water pump (5) that is driven by motor (4), water pump one termination pond (13), one end connects pressurizing vessel (7) through water inlet pipe (6), the pressurizing vessel top connects run-down pipe (9), surplus valve (8) is serially connected in the run-down pipe, and the side is connected to rising pipe (12), it is characterized in that described motor (4) input end is connected to the frequency converter (3) of control output frequency; Be provided with the air chamber (11) that constitutes by grid (10) in the described pressurizing vessel (7), the pressure stability mechanism that constitutes by frequency converter and the pressurizing vessel that has grid-like air chamber.

2. liquid pressure stabilizer according to claim 1 is characterized in that the input end of described frequency converter (3) is connected with computing machine (1) and the variable program controller PLC (2) of setting the frequency converter output frequency.

3. liquid pressure stabilizer according to claim 1 is characterized in that between the described air chamber grid (10) apart from the L=50-300 millimeter.

4. according to claim 1 or 3 described liquid pressure stabilizers, the relation that it is characterized in that described air chamber grid (10) length H and pressurizing vessel diameter D is H=(1/4-3/4) D.