CN201598996U - Throttling device - Google Patents

Abstract

The utility model relates to a throttling device of a heat supply pipeline performing heat tracing for single-well crude oil. The throttling device comprises a small-diameter metal pipe, the diameter of the small-diameter metal pipe is one-fifth to one-twentieth of that of a water delivery pipeline, and one end of the small-diameter metal pipe is fixedly connected with a double-surfaced sealing flange. The throttling device has the advantages that workers can calculate resistance coefficient according to field flow and pressure difference, the small-diameter metal pipe can be utilized to manufacture a required throttling element with regulating characteristics by adopting the simplest processing method, and field required regulating properties can be obtained accurately. In addition, the throttling device is stable in regulating properties, convenient in use and low in manufacturing cost.

Description

A kind of throttling arrangement

Technical field

The utility model relates to the throttling arrangement to the heating line of individual well crude oil companion heat.

Background technology

Solidify fixed oil field for little fault-block oilfield height, because the particularity in oil field, cause to the heating line waterpower energy imbalance of individual well crude oil companion heat seriously, exist suitable pipeline and require that pressure reduction is big, flow is little.Pressure differential range 0.2-1MPa, range of flow 0.02-0.1m3/h, therefore the requirement to the resistance coefficient of adjusting device is bigger.Adopt various control valve adjusting functions to be difficult to reach requirement and price comparison height; Though adopt restricting orifice can reach same restriction effect in theory, but because aperture too small (0.2-5 millimeter), requirement on machining accuracy height, easily abrasion in running, easily obstruction, the Flow-rate adjustment characteristic variations is bigger, is difficult to realize under the low discharge situation accurate Flow-rate adjustment.

The utility model content

The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of throttling arrangement to be provided, and has solved the fluid flow regulation problem under low discharge, the big differential pressure conditions, has reduced the adjusting device difficulty of processing, has improved the stability of adjusting function.

The purpose of this utility model is achieved in that a kind of throttling arrangement, comprise diameter be aqueduct diameter 1/5th to twentieth small diameter metal tube whose, the fixedly connected dual face seals flange of an end of described small diameter metal tube whose.

Manufacturing process of the present utility model: 1) adopt small diameter metal tube whose to make restricting element, as stainless steel tube with small diameter or copper capillary tube.2) try to achieve the resistance coefficient of the small diameter metal tube whose of different-diameter, different length by calculating, make chart and make things convenient for the scene to consult.3) basis $S=\frac{\mathrm{\ΔP}}{Q^2},$ Try to achieve the resistance coefficient of on-the-spot required restricting element.4) choose diameter, length according to resistance coefficient, can the field fabrication restricting element.5) aperture of restricting element is beneficial to the deposition of mechanical admixture less than 1/5th of pipeline aperture is installed.6) aqueduct is made inverted U-shaped, the utility model is positioned at inverted U-shaped peak, is beneficial to the deposition of import department's mechanical admixture.

The beneficial effects of the utility model are, the resistance coefficient that the workman scene can be calculated according to on-the-spot flow, differential manometer, adopt the simplest manufacturing process just can utilize small diameter metal tube whose to make the restricting element of required control characteristic, can obtain on-the-spot required adjusting function accurately, and adjusting function is stable, and is easy to use, cheap.

For the fluid to the small diameter metal tube whose both sides seals, fluid can only be flowed by small diameter metal tube whose, adopt filler and sealed letter sealing between described small diameter metal tube whose and the dual face seals flange.

As improvement of the present utility model, described small diameter metal tube whose is nested with sealed letter outward, filler and pad are set between small diameter metal tube whose and the sealed letter, one end of sealed letter is threaded with described dual face seals flange, the other end connects gland, and the other end sealing of gland is nested with the periphery in small diameter metal tube whose.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is a process Installation schematic diagram of the present utility model.

Among the figure, 1. dual face seals flange, 2. sealed letter, 3. small diameter metal tube whose, 4. filler, 5. pad, 6. gland, 7. outlet valve, 8. delivery gauge, 9. flow meter, 10. throttling arrangement, 11. bypath valves, 12. imported valves, 13 inlet pressure gauges.

The specific embodiment

As shown in Figure 1, be throttling arrangement, comprise that diameter is the small diameter metal tube whose 3 of aqueduct diameter 1/5th, the small diameter metal tube whose 3 outer sealed letters 2 that are nested with, filler 4 and pad 5 are set between small diameter metal tube whose 3 and the sealed letter 2, one end of sealed letter 2 is threaded with dual face seals flange 1, and the other end connects gland 6, and the other end sealing of gland 6 is nested with the periphery in small diameter metal tube whose 3.

According to technological parameter pressure differential and flow, calculate resistance coefficient S, and, check the internal diameter and the pipe range of the small diameter metal tube whose of answering according to the S value, select metal tube according to internal diameter, according to pipe range metal tube is cut, assemble by Fig. 1 then.Because small diameter metal tube whose is very little, differ more than 5 times with the pipeline nominal diameter of installation site, so the flow velocity sample differs from more than 25 times, water is very slow at the flow velocity of feed-line, and the ability of carrying mechanical admixture is very little.Add that novel restricting element is installed in the high position when the pipeline technological design, be convenient to the deposition of mechanical admixture, can prevent effectively that like this machinery card is stifled.As shown in Figure 2, the utility model directly is stuck in the centre of a secondary flange, can finish installation, generally needs supporting flow meter and import and export pressure meter in use, as the foundation of regulating.

Claims (3)

1. throttling arrangement is characterized in that: comprise diameter be aqueduct diameter 1/5th to twentieth small diameter metal tube whose, the fixedly connected dual face seals flange of an end of described small diameter metal tube whose.

2. throttling arrangement according to claim 1 is characterized in that: adopt filler and sealed letter sealing between described small diameter metal tube whose and the dual face seals flange.

3. throttling arrangement according to claim 2, it is characterized in that: described small diameter metal tube whose is nested with sealed letter outward, filler and pad are set between small diameter metal tube whose and the sealed letter, one end of sealed letter is threaded with described dual face seals flange, the other end connects gland, and the other end sealing of gland is nested with the periphery in small diameter metal tube whose.

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