CN2432559Y - Pipe gas and liquid fluid multiparameter signal initiating device - Google Patents

Abstract

The utility model relates to a pipe gas and liquid fluid multi-parameter signal initiating device. The utility model is characterized in that a trigger is a rhombic column with an upper and a lower cavity holes which are communicated with a plurality of signal acquiring holes on a smooth circular surface with an acute angle; the bottoms of the upper and lower cavity holes are blocked, and the tops of the upper and lower cavity holes are a high and a low pressure outlets which are separately connected with pressure-leading holes. When the utility model is used, the utility model is inserted into a fluid passage and outputs fluid physical signals for measuring instruments.

Description

Pipeline gas, liquid fluid multi-parameter signals initiator

The utility model belongs to the fluid parameter monitoring device.

All adopt the distributing instrument measurement for the measurement of important parameters such as the parameter of gas, liquid fluid in the pipeline such as flow Q, pressure P, temperature T for many years, because condition restriction, measurement point even also disperse.The monitoring of fluid parameter (Q, P, T) is three important parameters of pipeline fluid monitoring, in engineering, all has relatively independent important practical usage separately, influential mutually again, especially absolute static pressure P, the temperature T of prolonging flow process when fluid is random variation; The constancy of the density p value of fluid is stressed again, temperature effect is significant, promptly ρ=f (P, T), thereby then need by measure absolute static pressure P, temperature T carry out density conversion when realizing the compensation correction of flow measurement precision ( $Q_v=C\sqrt{\mathrm{\ΔP}\×T/P}$ m ³/ s, Q _v-fluid volume flow, the comprehensive constant value of C-), just bring difficulty and trouble to measurement.For this reason, in many cases, just abandoned density measuring and calculating link, given up flow measurement accuracy correction process, as the gas flow monitoring of mine gas drainage pipe network system.The orifice flowmeter that always adopts the different process form for many years is the classical measuring instrument of the throttle type of representative.The disadvantage of using this quasi-instrument is the energy loss that increases the system dynamic source, is not easy to installing/dismounting on the pipeline of operation, and the long-time running expense is big, and measuring accuracy is poor, can't realize online dynamic automatic monitoring and control.Occur vortex street principle, ultrasonic principle and pressure measurement in recent years and asked the flow instrumentation of fast principle etc., the instrument of these principles has solved the problem of automatic monitoring, but the specific aim of instrument development is too strong, exist the limited many fatal shortcoming of service condition (as fluid media (medium) density correction etc.), general and poor stability.

To be that design is a kind of both can satisfy portable digital display measuring apparatus even the pressure measurement of available U type differential manometer and dispatch a person the worker and calculate the purpose of this utility model, survey at random on the spot and read, the fluid multi-parameter signals initiator that can be used for the transmission of online monitoring demonstration and distant signal again, the quantity of the measurement parameter of this device and precision had both satisfied the general measure requirement, can satisfy the requirement of intelligent and automatic measurement means again, be convenient to realize automatic monitoring.

The structure of fluid parameter signal initiator of the present utility model is to be in the column of rhombus (two pairs of diagonal angles are handled through slyness) at xsect, is processed with the lumen pore of two same specifications, and one of them lumen pore is the fluid high-pressure lumen pore, and another is the low pressure lumen pore.The diameter phi in hole ₁Mm is more suitable in=(5～8).4～6 signals collecting holes of vertical brill are communicated with the high and low pressure lumen pore respectively on two rhombus acute angle round slip surfaces.The diameter phi of sensing hole ₂=(0.4～0.6) φ ₁, sensing hole quantity is relevant with the fluid line internal diameter, and concrete quantity is calculated by Chebyshev's formula and is calculated (or homalographic circule method).The bottom shutoff of two lumen pores, top are the high and low pressure outlet, and the high and low pressure outlet side respectively is processed with the tracting pressuring hole that communicates with it, is respectively high pressure tracting pressuring hole and low pressure tracting pressuring hole.When measuring fluid parameter, fluid physics amount signal initiator is inserted in the fluid line by the duct wall opening, and fix and seal, during insertion high-side signal gathered hole aligning fluid flow direction.Can draw different parameter signals according to different measurement requirement.Read pressure difference Δ P as pressure measurement instrument U type water column meter (or digital pressure differential detection instrument of band differential pressure pickup) is directly joined to surveying by the high and low pressure outlet of sebific duct and initiator, just can pass through then $Q_v=\sqrt{2\mathrm{A\ΔP}/\mathrm{\ρ}}$ Formula calculates the volume flow value Q of fluid _v(ρ is a fluid density value in the formula, and A is the internal diameter of the pipeline sectional area); Drawing the hole when the low pressure that is communicated with at initiator low pressure cavity is tightly connected and is used to measure the absolute static pressure P value of fluid when the ozzle joint is drawn low pressure; When Pt100 temperature sensor (or other model temperature sensor) is inserted earlier in the high-pressure chamber, the left side high pressure that temperature sensor wires is communicated with by the initiator high-pressure chamber draws and can be used for measuring fluid temperature (F.T.) after draw in the hole.So far, the physical quantity signal that just can utilize corresponding instrument to carry out fluid detects, that the input instrument that this embodiment adopts not only can adopt simple type but also can adopt the electrical type instrument and meter, measurement as temperature T, can select for use common resistance measurement instrument to carry out the resistance R pH-value determination pH, utilize R=f (T) relational expression reduced temperature value then; The measurement of pressure difference and absolute static pressure value has multiple pressure detection utensil for selecting for use.Measured value both can select for use the compensation correction formula of fluid flow to calculate when being non-stable constant value (be fluid density ρ), can select for use general fluid flowmeter formula to calculate (when ρ is stable constant value) again.Signal outlet on the initiator and tracting pressuring hole, measure when not required will be temporarily in addition shutoff in order to avoid gas leakage.

The utility model has the advantages that: be fluid physics amount signal initiator 1, owing to having adopted the rhombus cylinder of slick and sly processing corner angle, in gathering naturally, two obtuse angles of initiator play the effect of a fixedly separated point of symmetry (prolonging on the caliber cross-wise direction) to the fluid flow line of flowing through, and have guaranteed that there is not the boundary layer fluid layer in initiator surface (after the fixedly separated point) and is in the border disturbed flow condition all the time; The coefficient of shock resistance of the interference in initiator convection cell flow field and generation was not only stable but also can ignore like this, neglected to the power source loss of pipe network system is also little that it is little; Coefficient of flow is stable, and irrelevant with the pipeline Reynolds number; 2, the initiator simple installation is easily gone, and is particularly suitable for the absolute static pressure of pipeline inner fluid less than the pipeline with absolute altitude place barometric absolute pressure, promptly extracts the pipe network system of exhaust fluid mode out, as the mine gas drainage system; 3, measuring accuracy height when especially causing that when hydrodynamic pressure, temperature random variation fluid density is non-stable constant value, needs to measure absolute static pressure of the fluid power P and temperature T compensates correction, reaches the more measurement purpose of high-precision requirement.

Accompanying drawings embodiment of the present utility model.

Embodiment as shown in Figure 1, Fig. 1 is the main pseudosection of initiator.Marginal data: 1-initiator housing; 2-high pressure lumen pore; 3-low pressure lumen pore; 4-fluid parameter signals collecting hole; The 5-plug silk hole of removing contamination; 6-high pressure tracting pressuring hole; The 7-high-pressure outlet; The 8-low tension outlet; 9-low pressure tracting pressuring hole.As can be seen from Figure 1, signal initiator is that to handle acute angle at one through slyness be two diameter 6mm through holes of brill in 65 ° the rhombus cylinder (1) of corner angle, be respectively high-pressure chamber (2) and low pressure cavity (3), via bottoms is mantle fiber respectively, silk hole, bottom (5) is the plug silk hole of removing contamination, and high-pressure outlet (7) and low tension outlet (8) are arranged at the top; High pressure tracting pressuring hole (6) and low pressure tracting pressuring hole (9).The signals collecting hole (4) of boring four diameter 3mm on two acute angle rib round slip surfaces respectively is communicated with high and low pressure cavity (2), (3) respectively.

Claims (1)

1, a kind of pipeline gas, liquid fluid parameter signal initiator is characterized in that: at xsect is that the rhombus corner angle are in the column that slyness is handled, be processed with high pressure lumen pore and low pressure lumen pore, lumen pore bottom shutoff, the top is the high and low pressure outlet, outlet side is processed with the high and low pressure tracting pressuring hole that communicates with it, 4～6 signals collecting holes that are communicated with the high and low pressure lumen pore respectively of vertical brill on two rhombus acute angle round slip surfaces.