TW200302329A - System and method for delivering reactive fluids to remote application sites - Google Patents

Abstract

Reactive fluids that react upon contact and are intended to be combined only at a site of application that is remote or not easily accessible are transported to the site by separate crescent internal gear pumps whose pump rates are governed by a control loop that uses individual mass flow rates and a common automatic controller. In preferred embodiments, a multi-lumen cable is used to convey the pump outputs individually to the application site, and an application head at the distal end of the cable both combines the individual flows and dispenses them to the site. The invention is useful for a variety of reactive systems and applications, but particularly for applying two-component epoxy linings to underground pipes.

Description

200302329

发明 Description of the invention: (The description of the invention should state: the technical field to which the invention belongs, the prior art embodiments and the simple description of the drawings) Background of the invention I. Technical field Primitive month 7: In the field of fluid transfer systems, in order to control the flow And flow rate supply a variety of substances to the remote end. 2. Previous Skills At the construction sites and various types of commercial operations, two or more fluids need to be individually transmitted to the end of the tunnel and under controlled flow or flow rate. Examples of these operations are the repair of underground pipes by lining the inner surface of the pipeline or cracks in the wall of the grouting pipe. Other examples are places where the fluid or fluidized substance is supplied directly, such as buildings or construction sites such as bridges, parking lot structures, and building foundations. Other examples are the supply of materials to mines, manholes, underground tanks or reservoirs, subsea locations, and dams. An example of a substance that must be supplied individually and delivered under a bifurcation control ratio is a reactive component, where an early reaction must be avoided and the reaction stoichiometry must be maintained. Polymer systems, such as cymbals, polyurethanes, polyurethanes, and polypropylenes, are the main examples. Underground pipelines that carry water, sewage, or drainage are illustrative examples. These official lines are susceptible to deterioration due to decay, organic growth, rooting; participation, flow loading, ground movement, and general degradation. This degradation causes obstruction to the fluid passing through the pipeline and in some cases causes the pipeline to collapse. For example, the sewage pipe in the recovery can cause the sewage to leak out and pollute the surface water and soil formation, or it may cause the surface water to infiltrate and thus unnecessary increase the fluid to the treatment plant. Underground pipeline repairs are very expensive and replacement often requires significant ground disruption. 200302329 ⑺ 辕 Yuan: In order to avoid these interruptions, some underground pipeline repair methods have been developed that do not take the pipeline from the ground into a trench, and instead use remote control methods to apply the lining inside the pipeline. One method of lining in situ involves inserting a flexible tube lining (containing curable resin) into the pipeline. Once inserted, the lining is pressurized with fluid or air to press the lining against the inner wall of the pipe. , This is heated 'this step is a difficult step, because the uncured lining pipe cannot be operated in the pipe' and it is less complete to ensure that the pipe is properly placed or evenly pressed along its entire length to achieve the desired Repair degree. Another method of applying the inner layer by a remote device is to insert a long soft scum in the tube and spray the resin at the end of the pipeline through a nozzle to coat the inner wall of the tube 'so that the resin can be cured in place after being sprayed. Many of the resins applied in this way are two-component resins such as epoxy, polyurethane, and polyurea. To achieve the greatest effect, the two components of these reactive resin systems must be kept separate until they reach the point of application inside the tube, and therefore they must be cut off. The current type of pumping for this type of application is the use of a mechanical pair of proportional pumps. One of the difficulties of general two-component reactive resin systems and multi-component resin systems is that various components react at specific stoichiometric ratios, and any one of the meaning of / 7 will cause the presence of unreacted substances after the resin is matured. In addition to the unsatisfactory efficiency of the unreceived feed, 'the unreacted components remain in the resin = the moxibustion in the moxibustion is degraded'. In addition, the unreacted components will slowly pass through the two losses of the lining & pass 4 ^ speech line Of fluid. It is therefore important to maintain the correct stoichiometric ratio of the two components at the point of application in order to achieve maximum efficiency, quality of the lining, and women's quality. 200302329 (J) Invented by Binyi ~ ^ When using proportional pumps, 'acceptable control and flow ratio stability can only be achieved at pump flows below pump capacity, since most of the pulses (which are these pumps) Characteristics) can be eliminated by the accumulated pressure of the soft conduit between the pump and the nozzle and the spray nozzle itself before the next stroke is completed. This problem is particularly sensitive when there is little or no back pressure at the end of the catheter. However, typical millet capacity is less than 3 gallons per minute (0.7 cubic meters per hour). Thus, in order to reduce the pulsation of such pumps, the pump flow rate must be limited to about 1 gallon per minute (0.23 cubic meters per hour). This is acceptable for small diameter pipes, but for many sewer systems and other water The large pipe of the transfer system is not true. Proportional pumps also have limited variability in ratio adjustment, because they are mainly controlled by the pump ratio. Another difficulty of the two-component reaction system is that the component flow rate varies with viscosity, temperature, other factors affecting the component density, the degree of wear of the pump, and the condition of the flexible tubing used as the conduit. Flow is generally measured by differential pressure, and viscosity, temperature, and other factors described above affect differential pressure along the flow path and thus provide readings that are independent of changes in mass flow. It has been revealed that many components placed for contacting only at a remote location can be delivered to the component at a high degree of component flow rate control and the flow (including high volume flow) surrounding the Guangming Pavilion-Gonglihan M Temple. position. This hairpin Shida & existing in-situ application for pipe linings formed from multi-component lining materials and can be used at any designated location, including construction site, underground site, sea surface > site , And other high-speed backlash positions. This result consists of a kind of abundance; Su Yuan'7 ,,,, and Yuan Yuancheng, which includes individual crescent-shaped internal gear pumps with individual reaction components and a stream containing a volumetric flow rate that measures each mile's injury ( 4) 200302329 The flow rate controlled by measuring and comparing the measured value with the pre-selected value to correct the deviation from the pre-selected value can be transmitted to the unreachable construction site or the above by a multi-cavity cable for each individual cavity. The ends of the tubes are merged, where they can be dispersed. It is said that the control circuit of the automatic controller is called the bin truth value and generates a signal to adjust the pump speed. Taking V Camp 'as the remote location with individual components, it can be used inside the pipeline and any other applications. The components are merged and deposited and distributed at the inductive address. The crescent-shaped internal gears are provided. M > The stable flow of the medium pulse and the continuous variability of the flow rate are adjusted by allowing the flow rate of α and α to allow the correction of small deviations from the desired ratio without the need to consider device-based restrictions on this week . This mass flow is controlled by Zengwu Baili instead of differential pressure. Mass flow control allows the reaction chemistries to be maintained continuously and accurately and avoids the influence of components based on bifurcation or Adjustment of pressure drop rather than temporary Θ factor. In some applications, it may include system components in addition to the main reaction components to improve the properties of chemicals and materials, such as the physical and chemical characteristics of the liner (in the case of pipelines), or to accelerate the reaction rate, Or any number or characteristic of the improved method. The system of the present invention can selectively use these additional components by sending them individually and passing them under application-controlled flows in the same manner as the main components. These and other features, advantages, and specific embodiments of the present invention are described in more detail in subsequent sections of this patent specification. Implementation of the crescent-shaped internal #wheel pump with two circular gears, that is, an external gear with inwardly extending teeth that meshes with the outwardly extending teeth of the internal gear 200302329 ' Both gears rotate on the same casing but on different parallel vehicles (which make the gears eccentric), leaving a crescent-shaped space in between. Most of the crescent-shaped space is occupied by a crescent-shaped insert, which provides an adjacent gap between itself and the tooth tip of the gear. Either gear can be used as the drive gear, although internal gears are preferred as the drive gear. When the teeth of the gear leave from the meshing place, they create a gap, and when the gear rotates, the gap expands to generate suction ' to attract fluid into the space between the gears and thus into the pump. When the gear returns to the meshing position, the volume near the teeth decreases, thereby increasing the pressure and allowing the fluid to flow out through the discharge end. From this, the flow rate can be determined by the gear rotation speed. A typical crescent-shaped internal gear pump has thirteen internal gears. There are seventeen teeth in the external gear, operating at a speed from about 400 to about 6,000 revolutions per minute, preferably from about 700 to about 3,600 revolutions per minute, and with female rotation A displacement of about 0.3 square inches to about 15 square inches (about 0.05 liters to about 0 liters). The preferred pump is a continuous rated pressure with a range from about 2,000 psi / square inch to about 6,000 pounds per square inch and from about 3,000 pounds per square inch to about 5, A pump with a peak pressure of 1000 psi. One-way or multi-pass (typically double weight) pumps can be used. Crescent internal gear pumps are disclosed in US Patent No. 丨 8 (Tmninger is the inventor and was issued in … In the year of the year, No. 5,36,0325 (Henry, etc. as the inventor, the United States Navy as the assignee, awarded in January 1 年%), and No. 5,605,45 1 (Saitoh is the inventor and Toky〇Sintered N / 丨 etal Company Limited is the assignee, issued on February 25, 1997.) The disclosure of each of the above patents is incorporated herein by reference. Crescent interior Gear pumps can be purchased from pump suppliers, such as Chemicals Monroe, North Carolina, United States. 200302329 v; p said that every crescent-shaped internal gear spring of Meng Binhe is variable or adjustable by the conventional Driven by a frequency-driven motor, this type of frequency driver can be easily spoken from a supplier, such as Fuji Electric, Saddle Brook, New York A pump specifically designed to use a frequency-driven motor in the Western United States is available from General Electronic Industries, Plainville, Connecticut, USA and BaldorElectnccomany Fort Fort, Arkansas, USA. A typical frequency driver is model AF- 3 00 G1 1, purchased from Fuji Electric Corporation and General Electronic Industrial System q The mass flow rate measured according to the present invention is a flow meter using a known structure and operating principle for measuring mass flow rate, rather than a simple volume or 'Linear flow rate' without being deeply affected by factors such as pressure drop or other flow parameters that are not related to mass flow rate. Various forms of mass flow meters are known and commercially available, and any of them can be used in the present invention Applications. These types of flowmeters include thermal thermometers, electronic flowmeters, and Coriolis flowmeters. Coriolis flowmeters are preferred. In Coriolis flowmeters, the fluid whose mass flow rate is to be measured By a tube, which is completely vibrated by the introduction of the sine wave voltage of the electromagnetic drive of the eye. The flowing fluid exerts a Coriolis force on the tube to modify the oscillation, Often the points along the pipe are oscillated out of phase with other points along the pipe. The difference is directly related to the mass flow rate through the pipe and is used as a method of measuring the mass flow rate. Coriolis type flowmeters are disclosed in the literature, such as US patent No. 4,89 1,99 1 (Mattar and others are inventors, issued on January 9, 1990), and No. 4,9 1 1, 0 2 0 (T h 〇mps ο η is the inventor , Issued on March 27, 1990), No. 5,048,350 (Hussain and others are inventors, issued on September 17, 1991), and No. 5,054,3 26 (Mat tar and others are inventors, awarded in 1991丨 〇 8 月 年), all transferees to Foxboro 200302329 inventions are all here;

Company, Foxboro, Massachusetts, United States, and U.S. Patent No. 4,49 1,025 (Smith and others are inventors' issued on January 1, 1985) and Re 3, 450 (Smith Etc. was awarded by the inventor on February 11, 1982), and both were transferred to Micro Motion, Inc, Boulder, Colorado, USA. The disclosure of each patent in this section is incorporated herein by reference. Coriolis-type mass flowmeters are available from suppliers ’such as En dress + Hauser, Inc., Greenwood, Indiana, USA and Yokogawa Corporation, Newnan, Georgia, USA. Automatic program control can be achieved by conventional software, which can be easily programmed by anyone familiar with the use of chemical programs. Effectively used software

An example of this is LabvIEW program control software on a personal computer (such as an IBM compatible computer). The transfer of individual reaction components to the application site (which can be inside the pipeline or other back-off or otherwise reachable locations) can be achieved using conventional fluid flow conduits to maintain the components separated until they reach the application site. In the case of the inside of the pipeline, the age is estimated to be somber & ^ 1 Bi Bi's win is to control the speed by a long-range drive

So that the coatings of the desired thickness can be merged along the tube wall by the ends of the deposition officers, where they are deposited as a mixture to the outside and simultaneously react with each other. A multi-cavity cable can be used individually (commonly referred to in the industry as the "umbilical dosing line." A preferred multi-cavity cable contains additional cavities for lining for temperature control, such as hot water or any kind of circulation , Can also include other cavities for other forces to the power facility header at the end of the cable, to accommodate (8) 200302329

Temperature and pressure sensors, received from the temperature and pressure sensors, and Japanese α 琴 虎, provide signal transmission such as image signals so that the location of the facility " and ~ 彳 tsuka can be viewed from a distant (such as above ground) monitor, provided on the cable Allowance of mechanical devices at the end of the line, and the supply of f-forces to the light source to enhance the effect of the transmitter ^, the devices at the end of the multi-cavity cable can be components that incorporate and direct them to any device at the application site. In the specific embodiment of the application of the pipeline lining of the present invention, the nozzle may be a spray nozzle, may be airless or air-assisted, a ventilating device, a centrifugal casting device, or one capable of guiding the mixture to be evenly distributed around the pipeline. Any other injection device. For applications of the present invention that require a 360 degree application, a rotary sprayer is preferred, especially a sprayer with two rotors rotating in opposite directions simultaneously. In pipeline applications, it avoids or minimizes any change in coating thickness, which may form along protrusions or irregularities on the surface of the pipe wall. The sprayer can be mounted on the touch wheel ’This name list used here

Without any movable support, it can move along the length of the pipe with minimum resistance and fix the sprayer about the center of the pipeline so that when the catheter is pulled through the pipeline, the sprayer moves along the axis of the tube. The present invention can be applied to the deposition of a composition formed by the reaction of two or more ingredients, and therefore the ingredients react when contacted, so contact must be avoided until they reach the point of application 'to avoid early reactions. This statement applies to many polymers ° Examples are rain component polymer systems, including, but not limited to, cyclic, polyurethane, polyurea, and polyester. Epoxy is particularly important, especially for line lining applications. For optimum performance, maintain the temperature of individual ingredients in a preselected range to control viscosity and maintain uniform consistency. The system according to the present invention may also include additional pumps and transfer lines to supply additional -13-200302329 stern shaft recommended components to a mixing point on the ground or via individual cavities in a multi-cavity cable to the application site. For polymer systems, such additional components include modifiers such as gelling agents, accelerators, catalysts, and diluents, or any component that can be used to control the rate of reaction or the physical or chemical characteristics of the polymer coating. Although the present invention can be carried out in many different structures and installations, the system illustrated in Figure 1 represents a pipeline lining system and is used for illustrative purposes. In this system, the two components of the two-component polymer are stored in individual adjustment tanks 1 and 17; each is a jacketed container, and the jacket is supplied with hot water from the boiler 13; 13 is sent to the jacket by individual pumps 14,15. The container is also covered with an inert gas. The two components that form the polymer are self-adjusting tanks that are led out by the preliminary pumps 16 and '17. In this example, they are the conventional three-propeller pumps. The suitable products can be said from I π Pump and other pump suppliers. . The propeller mill circulates the ingredients through a regulating tank via a circulation circuit 1 8J 9. Each component fluid is drawn from the crescent-shaped internal gear pump 2 1, 2 2 from the circulation line to send the component to the multi-chamber or individual cavity of the "age band view line 2 3". Produced by the crescent-shaped internal gear pump The mass flow rate is detected by individual Coriolis flowmeters 24, 25. The three-way 阙 26, 27 of each crescent-shaped internal gear pump outlet line allows the pump output to be directed back to the circulation circuit 18, 19 or To the umbilical cord. The umbilical cable (the above-ground part of the line 23 is installed on the reel 28 and guided by the linear view line halo guide 29 (which controls the linear speed of the cable) to the reel or from the reel bow. The temperature of the slow line is controlled by hot water supplied separately from the steel furnace 13 and the pump 30. Alternatively, the temperature of the cable can also be controlled by an electric heater (not shown) extending along the length of the cable. At the end of the umbilical cable For Image Camera 3 4, Static or Dynamic Mix-14-200302329

(ΊΟ) ^ 31 and the appliance header 32 on the touch wheel 33. An image camera 3 4 is also included to view the inside of the tube before and during the coating process. The sequence avoidance controller 41 receives signals from mass flow meters 24, 25 and various data collection points in the system, such as thermometers, pressure sensors, cable speeds, and liquid level indicators (which are shown in the figure). (Not shown), and send signals to components such as a crescent-shaped internal gear pump and a linear cable traction device to control the program parameters accompanying these components. As mentioned above, additional feed lines for additional components can be added to incorporate the umbilical cord or mix with system components before entering the umbilical cord or along any point of the process fluid line shown in the figure. Figure 2 illustrates an example of an umbilical (or multi-cavity) cable 51 suitable for transporting a two-component reactive polymer such as the oxygen used in the present invention. The wearing area shown in the figure shows that the cable includes an outer sheath 52 composed of a copper braided wire implanted in a polymer. Contains two cavities 5 3, 5 4 to convey individual components of the lining composition, and additional cavities 55, 56 to circulate hot water. These are closed cavities joined at the ends, one for incoming flow and one for back flow. The remaining cavities are occupied by power lines, sensor lines, controller lines, and image viewing lines. An additional flow chamber may be added to deliver a conditioner or other additive to the polymer composition to be applied. The foregoing description is mainly for illustrative purposes. Other variations and modifications that still embody the basic elements of the present invention can be easily known to those skilled in the art and are included in the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a general system in an official line according to the present invention. Figure 2 is a cross-sectional view of a multi-cavity cable suitable for transferring individual components of a pipeline lining composition via an underground pipeline. 200302329

Explanation of Symbols in the Drawings 11, 12 Regulating Tanks 13 Boilers 14, 15, 30 Water Pumps 16, 17 Preliminary Mills 18, 19 Circulation Circuits 21, 22 Crescent Internal Gear Pumps 23, 5 1 Umbilical Cables 24, 25 Coriolis Type Flowmeter 26, 27 Three-way wide 28 1 Reel 29 Linear cable traction device 3 1 Mixer 32 Apparatus header 3 3 Touch wheel 3 4 Video camera 4 1 Program logic controller 52 Outer sheath 53, 54, 55, 56 Cavity Invention · Turn: · Cable Sheet ·

-16-

Claims (1)

200302329 Patent application scope 1 · A system that transfers a large number of reaction fluids to a remote application site under a controlled flow without early reaction, the system includes: a number of robust tanks, each of which holds one of the reaction fluid, and Each of the storage tanks has an independent outlet line to discharge the contents of the storage tank; there is a crescent-shaped internal gear pump at each of the independent outlet lines to generate independent flows at each selected flow rate of the reaction fluid Fluid; The mass flow rate measuring device continuously measures the mass flow rate of each independently flowing fluid and generates an independent signal representative of each mass flow rate measured thereby; A single automatic controller 'receives all the independent signals, compares the signals with the target value, and controls the speed of each crescent-shaped internal gear pump to correct the deviation from the target value;' individually transfers the output fluid to the long distance An application address, and merging the output fluid at the remote application address; and The gears receive the output fluid of the crescent-shaped internal gear pump individually, and the combined output fluid is dispersed by the bow address. A system 'wherein the mass flow rate measurement type mass flowmeter is in each of the systems, wherein each of the outlets discharges a branch stream of the reaction fluid from the circulation loop and a 1-shaped internal gear pump is installed in the branch stream. 200302329 Applying for a special brake fan 圜 bin buy 4. The system according to item 1 of the scope of patent application also includes a number of individual variable frequency drive motors 'Each of the crescent-shaped internal gear pump is driven by one of the motors' The controller is adjusted by The frequency drives the frequency of the motor to control the speed of the crescent-shaped internal gear pump. ). The system according to item 1 of the patent application, wherein the delivery device includes a multi-lumen cable with individual lumens for each output fluid. System ’each of the crescents Square inch spike pressure. 6 ’System according to item 1 of the scope of patent application 7. System according to item 1 of the scope of patent application The underground pipe pulls the transfer device. 8. The system according to item 5 of the scope of patent application further includes a traction device for temperature control via a cable c The mixer device between the application devices includes the storage tank and the multi-chamber. The multi-chamber cable further includes a temperature-controlled water circulation chamber. t Included in the multi-cavity cable and