WO2019004813A1

WO2019004813A1 - Liquid sampling device

Info

Publication number: WO2019004813A1
Application number: PCT/MX2018/000057
Authority: WO
Inventors: José Ángel Ramírez Villegas
Original assignee: Ramirez Villegas Jose Angel
Priority date: 2017-06-30
Filing date: 2018-06-25
Publication date: 2019-01-03
Also published as: MX2017008788A

Abstract

The present invention relates to a liquid sampling device comprising: a transparent tube in the form of a pipette, and a pair of perforated stops secured at the inner ends of the tube, said stops allowing the interior of the transparent tube to be sealed using a pair of spheres. The transparent tube is submerged in the liquid to be sampled, the liquid enters the tube through the openings in the stops, and remains trapped therein when the tube is extracted, the spheres remaining fixed in place blocking the openings in the stops. In addition to being transparent in order to allow the sampled liquid to be assessed visually, the device comprises a base with a stem that penetrates the hole in the lower stop, removing the sphere from its sealing position and allowing the liquid contained in the tube to be released. The device has been designed for, but not limited to, taking samples of liquids stored in large tanks, such as petrol.

Description

LIQUID SAMPLING DEVICE

FIELD AND OBJECT OF THE INVENTION

The present invention, as expressed in the title of this specification, pertains to the field of mechanics. Specifically to the liquid container area. Particularly, a liquid sampling device is disclosed that has the function of collecting and storing a sample of a liquid stored in a deep container, which must be analyzed visually by an operator to verify its purity.

The device is designed so that, through its use, the operator can extract the liquid stored in a deep container, for example, gasoline contained in an underground tank block, without coming into direct contact with said liquid. The characteristics of the disclosed device allow not only the safe sampling of the liquid and its visual analysis, but the emptying of the same to its original container or to another container through an accessory specifically designed for such purpose.

BACKGROUND

In the liquid transport and storage sector, one of the options for protecting large volumes of substances consists of the use of tank tanks, which are generally underground deposits whose access is restricted to operators due to construction conditions and location, in addition to many times stored liquids possess harmful properties for the being human; or as otherwise, access is restricted to safeguard the conditions of purity and innocuousness of the content.

In this way, providing maintenance to these deposits becomes somewhat complicated, since the content must be emptied to access the interior. Therefore, the service is scheduled, taking into account a reasonable period of time according to the working conditions of the deposit. However, sometimes maintenance is done regardless of the conditions of the deposit, when it may not actually need it or even require it in advance due to the poor quality of the content introduced. Among the conditions that are detected and that alert the operator of the need for a maintenance service are: the accumulation of sediment or floating particles, the formation of rust on the walls of the tank, the presence of substances foreign to the stored substance, among others. The problem is that it is seldom possible to know the real state of the interior of the tank and its contents, in order to make a decision regarding its maintenance.

To solve this problem, the state of the art presents a set of options that could be applicable to know the current situation of the contents of the deposit, such as those presented below.

CN 104359709 discloses a fluid sampling device. The fluid sampling device comprises a base, a straight tube, a valve and an elbow tube, a channel being arranged in the base, the cross section of the circular channel. The device has the characteristics that installation, detachment and maintenance are easy. CN104181011 discloses an automatic liquid separation sampler comprising a vertically disposed container body, wherein a plurality of narrow bottom parts are disposed in the container body at top-to-bottom intervals; the liquid outlet tubes are respectively provided with a sampling valve; All liquid separation cavities are respectively internally provided with a hollow floating ball.

Document US20160363226 points out a sampling device that uses two ball valves that can be actuated to take a sample while allowing the flow to continue on a bypass path in a pressurized pipe. When a ball valve is closed, it can capture a sample of liquid and gas that may be traveling in the pipeline, then the sample can be discharged through a sampling outlet. The second ball valve can be actuated simultaneously to open a bypass path while the first ball valve captures a sample.

Document RU0002589547 shows an invention that collects samples from the collector valves of the head of the oil well, and the sampling fluid from the pipeline.

JP2008286730 discloses a device for preventing a liquid from dripping out of a reagent plate, in a device for developing a reagent during binding to treat a sample with the reagent, attaching a sample plate to the reagent plate.

Document RU02133021 describes a device that is intended for obtaining a precise volume of liquid sampled from a leak-proof container equipped with a connection device to which the device can be connected proposed. The liquid sampling device has a floating ball placed in the float chamber whose dimensions provide its tight fit in the upper hole. It is made to take precise and defined volumes of liquids which makes feasible to measure content of impurities in liquid, its quality and physical properties.

US5741464 designates a sampling tube for use in the sampling of a liquid or fluid, in which a single valve is in the tube, a universal moving ball in the tube and a liquid or fluid outlet at one end of the tube that it has an opening that defines an exit orifice.

US4561315 discloses a liquid sampling apparatus for use in sampling the liquid in a well tube to determine the surface contaminants contained therein; includes a unitary tubular housing formed to provide a valve seat therein. A ball, which can move freely within the tube, is inserted to cooperate with the valve seat to form a valve that remains closed once the sampling tube is filled with water.

US9352882 describes a fluid outlet system, applicable for containers of liquid substances. The fluid outlet system has a circular opening, at a rear end of a cylindrical tube, having a removable metal ball cover that controls the flow of liquid from the container. The removable metal ball cover can be easily dislodged by a mechanical switch in order to dispense liquid, and is held firmly in place by magnets in a valve seat of the circular opening, when the fluid outlet system is in a closed position, to stop the flow of liquid. US8844743 discloses a compressible container having a cover configured to engage therewith. The cap includes a first valve, preferably in the form of first and second discs on top of each other, each disc having at least one hole therethrough. The second valve can comprise a ball inside a conical section tube. The ball is designed to float on the liquid so as to prevent any liquid attempting to exit the container lid from closing the second valve when the liquid forces the ball into engagement with the conical section tube.

Document MX / a / 2016/008545 describes a system to analyze the production of an oil well, receives samples of production fluids from the oil well according to an automatic sampling program. The fluid samples are received inside a degassing cylinder and are separated into a liquid phase and a gas phase, with the liquid phase automatically transferred to a sample cylinder for water cut analysis. Once the liquid phase has been transferred to the sampling cylinder, a piston inside the degassing cylinder automatically evacuates all fluid from the cylinder to prepare to receive a sample of subsequent fluid from the oil well.

Document MX / a / 2012/012590 presents a technique that involves the sampling of fluids in a well environment. An expandable obturator is constructed with an outer seal layer. At least one sample drain is positioned through the outer seal layer, and a heating element is deployed in the at least one sample drain. In one embodiment, the heating element is deployed proximate a radially distant surface of the expandable plug. In addition, a sensor The temperature can be positioned close to, at least, a sample drain to monitor the temperature in the environment heated by the heating element.

The document MX / a / 2009/012725 describes a method for obtaining fluid samples from an underground formation including positioning in a borehole a first tool having a heater, such that the heater is adjacent to a portion of the underground formation; heat the portion of the underground formation with the heater; move the first tool from the hole; positioning in the perforation a second tool having a sampling probe, such that the sampling probe is in contact with a portion of the underground formation heated by the heater; and obtaining, via the sampling probe, a sample of the fluid from the portion of the underground formation heated by the heater.

US2016313222 discloses a sampling device configured to extract a sample of a fluid such as an oil flow. The sampling device has an extraction channel for the fluid, a sample extraction device configured to press a sample into the sample extraction channel and a check valve in the sample extraction channel.

Despite the multiple possible solutions presented for the problem described above, these entail difficulty and lack of practicality in their use. In addition, the materials used for its construction use materials that, in one way or another general sparks by friction, feature that represents a great risk as will be illustrated in the section of Preferential Modality of the Invention. Therefore, in light of the state of the art, the disclosed invention is presented here, which solves the problems of portability and handling, as well as using safe materials for handling all types of substances. BRIEF DESCRIPTION OF THE FIGURES

FIGURE 1.- Isometric view of the sampling pipette.

FIGURE 2.- Front view of the sampling pipette with the spheres in closed position. FIGURE 3.- Front view of the sampling pipette with the spheres in open position. FIGURE 4.- Front view of the pipette, with detail on the handle of the rope.

FIGURE 5.- Front view of the sampling pipette with detail in the upper and lower spheres and stops in closed position.

FIGURE 6.- Front view of the sampling pipette with detail in the spheres and upper and lower stops in the open position.

FIGURE 7.- Isometric view of the base, in a way that illustrates the position of the shank. FIGURE 8.- Top view of the base, in a way that illustrates the position of the stem. FIGURE 9.- Front view of the base, cross section that illustrates the position of the exit of the base.

FIGURE 10.- Front view of the sampling pipette and base assembly, with cross section and detail in the assembly area.

DETAILED DESCRIPTION OF THE INVENTION

The present technical specification describes a sampling device for liquids whose function is to take the sample of a liquid contained in a deep container and to be able to verify the purity of said liquid. The sampling device for liquids comprises two parts: a pipette and a base to place the pipette.

The pipette in turn comprises of a transparent tube (1), two spheres with smaller diameter than the transparent tube (2), two stops (3a), a rope handle (4) and a rope (5).

The transparent tube (1) functions as a container for liquids; It can be of any geometric profile. The spheres (2) have the characteristic of being perfect circles that fit in the upper ends of the stops.

The stops (3a) have an outer diameter equal to the inner diameter of the transparent tube. Said stops comprise a hole (3d) in the center that crosses them completely and with a smaller diameter than the spheres and a plurality of packages (3b) that can hold the stops to the tube and prevent the passage of liquids. The stops (3a) are of the same geometric profile of the tube and have a notch (3c) in the upper edges of the inner hole, where it can hold a sphere to seal said hole completely. The gaskets (3b) of each stop are located around the inner wall of the tube. At the bottom of the tube is placed one of the stops with their gaskets to seal the tube, and a sphere.

In the upper part of the tube, the rope handle (4) is placed where the tube is tied to the rope (5). Another stop (3a) with its packing (3b) is placed under the rope handle (4) so that it can hold the other sphere (2) and this has space to move between the stop and the rope handle.

The base for the pipette comprises a hollow body (6a) designed so that the transparent tube enters without difficulty; below the geometric body there is an outlet (6b) with the shape of the mouth of the deep container containing the liquids analyze. A rod (7a) with a smaller diameter and a longer length than the internal hole of the stops is placed in the center of the geometric body, so that, when the tube is inserted in the base, the rod enters the hole and lifts the sphere, releasing the liquid contained in the pipette.

PREFERRED MODE OF THE INVENTION

In a preferred embodiment of the invention, the transparent tube (1) has a cylindrical profile and the material is friction-proof to prevent the generation of sparks or heat, for example, PVC.

In another preferred embodiment of the invention, the spheres (2) are perfect circumferences of acetal resin, that is, of a material that is friction-proof to prevent the generation of sparks or heat.

In another preferred embodiment of the invention, the spheres (2) are perfect circumferences of nitrile, that is, of a material that is friction-proof to prevent the generation of sparks or heat.

In another preferred embodiment of the invention, the stops (3a) each have two grooves in the outer wall so that the gaskets (3b) adjust to them, preventing the passage of liquid between the tube and the stop, in addition to prevent the stop from moving from its position. The stops are also made of a material that is friction-proof to prevent the generation of sparks or heat.

In another preferred embodiment of the invention, the handle comprises a plate (4a) with two holes and a beam (4b). The transparent tube has a pair of diametrical holes in such a way that the beam (4b) passes through them. The beam serves as support for the plate passing through one of the holes thereof, joining said plate (4a) with the tube. In the upper part of the plate there is a second hole that crosses it and serves as a mooring point for the rope. The handle is also made of materials that are friction-proof to prevent the generation of sparks or heat.

In another preferred embodiment of the invention, the rope (5) is made of a material that is friction-proof to prevent the generation of sparks or heat, for example, cotton.

In another preferred embodiment of the invention, the base (6a) is of cylindrical profile and the stem (7a) is supported to the body of the base through a plurality of support beams (7b), leaving space between them so that the liquid can pass through the base and be emptied into the deep container.

In another preferred embodiment of the invention, the liquid sampling pipette is used to visually verify the purity of the gas contained in the deep container without the need for the operator to have direct contact with gasoline. Firstly, the operator opens the mouth of the storage tank, takes the pipette by the rope and puts it into the tank. While the pipette is going down through the deep container the tube is filled with the contained liquid until the tube touches the bottom and with the same impact the two spheres lower to seal the tube and prevent the liquid from leaving. The operator pulls the device completely out of the storage tank and visually analyzes it for foreign particles or particles that are foreign to the natural composition of the liquid. Once the liquid has been analyzed, the base is mounted in the container where it is going to be discarded or back to the storage tank. The tube is inserted in the base in such a way that the stem of the base enters the hole of the lower stop, moves the sphere and the liquid can go out to the container.

Claims

CLAIMS Having described my invention sufficiently and clearly, I consider as a novelty and therefore claim as my exclusive property, what is contained in the following clauses.

1. Device for liquid sampling that includes:

a sampling pipette which in turn comprises a tube of transparent material, means for filling and emptying, means for retaining the sampled liquid, and means for its clamping; Y

a base which in turn comprises a hollow body and a rod attached to the hollow body whose diameter and length are attached to the sampling pipette;

characterized in that the filling and emptying means comprise a pair of perforated stoppers placed on the upper and lower ends of the transparent tube and secured by fastening means that also prevent the passage of the liquid between the junction of the stops and the tube, wherein each The stop is sealed by a sphere with a larger diameter than the stop hole so that the tube can contain a liquid.

Device for sampling liquids according to claim 1, characterized in that the components are made of materials that are friction-proof and generate sparks and / or heat.

Device for sampling liquids according to claim 1, characterized in that the tube of transparent material, the stops and the base have a circular profile.

4. Device for sampling liquids according to claim 1, characterized in that the spheres are perfect circumferences made from acetal resin.

5. Device for sampling liquids according to claim 1, characterized in that the spheres are perfect circumferences made from nitrile.

Device for sampling liquids according to claim 1, characterized in that the means for fastening the stops are plastic packages.

Device for sampling liquids according to claim 1, characterized in that the means for fastening the stops are joined to the stops by a plurality of grooves made in the external wall of both stops.

Device for sampling liquids according to claim 1, characterized in that the means for fastening the sampling pipette comprise a beam joined to the tube by means of two diametrical holes made in the end of the tube, where said beam passes through of a first hole made in a plate, which also has a second hole as a mooring point for a rope that is attached to the plate and holds the entire sample pipette.

Device for sampling liquids according to claim 1, characterized in that the rod has a smaller diameter and a length greater than the diameter and length of the hole of the stops, and is connected to the body of the base through a plurality of beams that They go from the body to the stem, leaving a space between the beams that allows the passage of the liquid through the body of the base.