CN1003490B - Method and device using additive for reducing flow resistance - Google Patents

Abstract

The present invention relates to a method and a device for reducing the flow resistance of liquid, and the method comprises the following steps of mixing a soluble polymer with the same kind of liquid to form mixtures resistance reduction performance, and injecting the mixtures into flowing liquid, and mixing the mixtures with the liquid. The present invention is suitable for various fields of fire protection, hydraulic mining, hydraulic construction, etc., and is particularly suitable for the fire protection. The device can be arranged on an automobile or a ship, and the concentration and the range of jet stream can be greatly improved under the condition that the original equipment is not changed. The present invention provides convenience for fire extinction for a large fire scene or a high-rise building.

Description

Use the method and apparatus of the additive of reducing flow resistance

The present invention is with a kind of relevant with the method and apparatus that a kind of liquid mixes mutually with soluble polymer, particularly in order to make the solution that reduces flow resistance that can use continuously and soluble polymer is relevant with a kind of mixing of liquid solvent easily and effectively.

The present invention comprises a kind of like this method and apparatus: make a kind of polymer solution fully form the performance that reduces flow resistance, so that injecting flowing liquid, and mix with liquid, reach the best effect that reduces flow resistance.

Additive or additive are mixed mutually with liquid, and this mixture is ejected in the external limiting layer, so that the method and apparatus that rubs between the surface that reduces boundary layer liquid and move with respect to liquid, disclosed in DRP specification 2051873 and british patent specification 1458309, above-mentioned known technology all is to be ejected in the external limiting layer with mixture, with friction between the surface that reduces boundary layer liquid and move with respect to liquid is that the mechanism of reducing flow resistance produces, the mechanism of the reducing flow resistance that draws from present experiment and theory analysis is but mixed with liquid mutually for additive or additive, inject flowing liquid, mix with liquid, reducing of the mantle friction that the generation of neutralizing liquid fluctuation and turbulent flow in flowing and making is moved at the liquid of external limiting layer and with respect to liquid, coefficient result, and the former plays significant feature for stream in the pipe.The described method and apparatus of known technology is applied to manage the interior flow resistance that flows and reduces thus, can not reach best effect.

Purpose of the present invention, be that will to propose a kind of dissolution velocity fast, anti-shearing degradation capability is strong, the good soluble polymer of chemical stability with a kind of in and the insoluble solvent of density mix mutually, to form a kind of liquid dispersion, it is liquid suspension, and with the liquid hydration, make the soluble polymer swelling, reach diastole state, again the solution that forms is injected flowing liquid, makes it to mix equably with liquid, neutralizing liquid in flowing, fluctuate and the generation of turbulent flow and reduce boundary layer liquid and the surface of moving with respect to liquid between the method and apparatus that rubs.The basic starting point of the present invention is to provide one for stream in the pipe, the particularly method and apparatus that uses during injection stream.

Design feature of the present invention is, there is one to be used for depositing and to provide the solid solubility polymer in non-solvent, to form the container of liquid suspension, liquid suspension is injected the liquid-inlet pipeline of pre-molten device by plunger displacement pump, and with mix mutually from the high pressure of liquid pump output terminal feedback liquid after, enter pre-molten device, hydration in pre-molten device, make soluble polymer obtain necessary swelling, reach diastole state, additive after pre-molten is under the promotion of high pressure feedback liquid, injection is also passed through liquid pump inlet pipeline, enter the liquid pump with working fluid, under the effect of liquid pump, mix with liquid equably, enter drain line then, so promptly improved the efficient of liquid pump, also made additive in drain line, reach the best effect that reduces flow resistance simultaneously.The liquid of indication is generally water in this design, but does not also get rid of non-watery liquid, for example: kerosene and gasoline etc.

Above-mentioned plunger displacement pump can replace with piston pump.

Owing to adopted above-mentioned design, make the effect of additive through the liquid pump, evenly mix with liquid, can make additive under the mechanical shearing effect, cause certain degraded like this, thereby the effect that reduces resistance is reduced, and the polyethylene glycol oxide that adopts known technology to carry, anti-mechanical shearing ability a little less than, and the anti-static degraded of polyethylene glycol oxide and chemical stability are also relatively poor, the suspension long preservation of mixing formation mutually with the non-solvent liquid of density in being unfavorable for together, so now selected polyacrylamide for use, because its main chain all contains the C-C key, thereby anti-mechanical shearing is better than polyethylene glycol oxide with anti-static degradation capability, simultaneously the additive of forming by polyacrylamide have stronger hydrophilic group because of, so have instant characteristic, can dwindle the volume of pre-molten device so widely, and make it simple in structure, has identical polarity between the contiguous links of final polyacrylamide strand, then this kind polymer is easy to stretch in water, the effect that reduces flow resistance is better than other polymer, and can select carbon tetrachloride etc. for use with the non-solvent liquid of polyacrylamide formation suspension.

The present invention will come sets forth in detail by following embodiment and accompanying drawing

Fig. 1 is the structure principle chart of device of the present invention.

Fig. 2 is the cutaway view of injector (10).

Fig. 3 is the cutaway view of check valve (5).

Fig. 4 is the vertical view of Fig. 3.

Fig. 5 be Fig. 3 along A-A to amplification sectional view.

Design shown in Figure 1, by one deposit and provide soluble polymer in and form the container (2) of liquid suspension in the density non-solvent, constantly suspension is sent into pre-container (6) by plunger displacement pump, plunger displacement pump is by single pole plunger case (13), check valve (5) and motor (14) are formed, motor (14) rotates and drives a connecting rod, the plunger that drags single pole plunger case (13) again moves back and forth, when multiple-way valve (3) is in and container (2) and pipeline (4) communicating state, when the plunger of single pole plunger case (13) moves right, make check valve medial compartment (5b) be in low-pressure area, check valve right ventricle (5c) closes like this, open chamber, a left side (5a), suspension is by multiple-way valve (3) and pipeline (4), from the port inflow of check valve chamber, a left side (5a), inspiration medial compartment (5b); When the plunger of single pole plunger case (13) is moved to the left, make check valve medial compartment (5b) be in the higher-pressure region, check valve right ventricle (5c) opens like this, chamber, a left side (5a) is closed, suspension is pressed into right ventricle (5c), and deliver in the injector (10) along pipeline (12), and with mix from the high pressure of liquid pump (9) output feedback liquid along pipeline (11), and enter pre-molten device (6), soluble polymer obtains necessary swelling in pre-molten device (6) after, reach diastole state, solution after pre-molten is under the promotion of high pressure feedback liquid, be admitted to along pipeline (8) in the entrance pipe (7) of liquid pump (9), further mix, and enter liquid pump (9) with working fluid with liquid, additive is executed at a high speed under the commentaries on classics at the impeller of liquid pump (9) and is evenly mixed with liquid, enter liquid output pipe road (15), so promptly improved the efficient of liquid pump, also lowered the resistance that liquid flows on the liquid output pipe road significantly.

In above-mentioned device, also be a container (1) of depositing cleaning fluid, before use, make multiple-way valve (3) be in the state that container (1) communicates with pipeline (4), the effect that makes cleaning fluid pass through gravity flows in the working chamber and check valve (5) of single pole plunger case (13), the air of getting rid of the inside improves the efficient of plunger displacement pump.After use, make multiple-way valve be in container (1) and the state that pipeline (4) communicates, cleaning fluid is sucked in the plunger displacement pump clean, so that use next time.

Above-mentioned pre-molten device (6), because make soluble polymer obtain necessary swelling, reach diastole state, promptly will be in pre-molten device (6) more than pre-molten 13 seconds, so the diaphragm more than has been installed in pre-molten device (6) to prolong the pre-molten time of polymer.

The device of this design is applicable to the various fields of fire-fighting, hydraulic mining, hydraulic operation etc., be specially adapted to fire-fighting, this device can be installed on automobile and the ship, do not changing under original equipment situation, can improve ability to work widely, the closeness of injection stream and range all improve a lot, and be more effective to the big scene of a fire or skyscraper fire extinguishing.

It is a Venturi tube for an injector shown in Figure 2 (10), is used for the injection suspension, makes with high pressure feedback liquid well to mix, and utilizes the low-pressure area of injector simultaneously, reaches the back pressure of low plunger displacement pump, thereby reduces the power of motor.

Fig. 3 and check valve (5) shown in Figure 4 are by valve body (16), inner valve body (19), guide cover (20,22), two springs (20,21) and two valves (17,18) form a medial compartment with about two relative common check valves, at inner valve body (19) and guide cover (22), be provided with guiding valve stem guide (17a, 18a) Yun Dong pilot hole (22a, 19b), because exist particle that pilot hole is blocked in the suspension, so guide post (17a, 18a) is designed to polygon, make guide post (17a, 18a) with pilot hole (22a, 19b) is the line contact between, guide post (18a) adopts tetragonal as can be seen from Figure 5, again because the pilot hole (22a) on the guide cover (22) be a blind hole, radially have a lot of through holes for the interior suspension of guide cover (22) can be discharged rapidly at the guide pipe of guide cover (22).Respectively sticked a rubber tissue (23,24) in order to make on the contact-making surface that can well be sealed in two valves (17,18) and valve port between valve (17,18) and the valve port, and correspondingly be provided with a collar (16a, 19a) at valve port, because the polymer suspension thing is granularly will cause the sealing of valve and valve port tightly and greatly not reduce the operating efficiency of plunger displacement pump, and has adopted above-mentioned design just to eliminate the granular not tight phenomenon of sealing that causes of polymer particles between valve and valve port.

Institute's soluble polymer refers generally in the present disclosure, the viscoelastic polymer of the macromolecule line style of solubility, term " hydration " is also included within a kind of to institute's dissolved substance The suitable solvent equally, and for example kerosene, gasoline is to non-watery polymer dissolution, reaches to have the performance that reduces flow resistance.

Claims (9)

1, is used to supply with the method that a kind of resistance reduces additive, this method for a kind of solid solubility polymer with a kind of in mix mutually with the non-soluble solvent of density, to form a kind of liquid suspension, then suspension and liquid hydration, formed solution is injected among the flowing liquid again, it is characterized in that the solid solubility polymer is a polyacrylamide, liquid is water, non-soluble solvent is a carbon tetrachloride, more than 13 seconds, and this solution is mixed equably with working fluid suspension and liquid hydration time.

2, be used to supply with the device that a kind of resistance reduces additive, this device have one be used to provide the solid solubility polymer in and form the container of liquid suspension in the non-soluble solvent of density, pre-molten device with liquid suspension hydration swelling, the liquid pump of main flow pipe, have one liquid suspension sent into the plunger displacement pump or the piston pump of pre-molten device, it is characterized in that having one to link the tributary pipe that communicates with pre-molten device with liquid pump two sides of main flow pipe.

3, device according to claim 2 is characterized in that being provided with more than one diaphragm in the pre-molten device.

4, device according to claim 2 is characterized in that plunger displacement pump is by the single pole plunger case, and check valve and motor are formed.

5, device according to claim 2 is characterized in that the check valve in the plunger displacement pump, by valve body, inner valve body, guide cover, spring and two valves form a medial compartment with about relative two common check valves.

6, device according to claim 2 is characterized in that contacting for line between check valve, valve stem guide and the valve body pilot hole in the plunger displacement pump.

7, device according to claim 2 is characterized in that the check valve in the plunger displacement pump, at two valve ports one collar is arranged respectively.

8, device according to claim 2 is characterized in that the check valve in the plunger displacement pump, respectively posts a sheet rubber on the contact-making surface of two valves and valve port.

9, device according to claim 2 is characterized in that the check valve in the plunger displacement pump, has a lot of through holes in the guiding caliber of its guide cover.

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