CN106050157A - Drill pipe device for mixed injection of various medicaments - Google Patents

Abstract

The invention discloses a drill rod device for mixed injection of multiple medicaments, which comprises an outer rod, an inner rod and a drill bit. Wherein, the outer rod and the inner rod are both hollow structures and are sleeved together, and the gap between the outer rod and the inner rod forms a first cavity; the upper part of the outer rod is provided with a first medicine connection port, and the first medicine connection port is connected to the The first cavity is connected; the inner wall of the bottom of the outer rod is provided with a step, which closes the first cavity together with the outer wall of the inner rod; the upper part of the inner rod is provided with a second medicament connection port, and the second medicament connection port is connected to the cavity of the inner rod Connected; the drill bit is connected with the outer rod, and there is a second cavity inside the drill bit, and the second cavity communicates with the cavity of the inner rod; the side walls of the first cavity and the second cavity are respectively provided with spray holes communicating with the outside . The invention provides a drill pipe device for in-situ injection of soil and groundwater, which realizes the underground mixing of various agents, reduces the consumption of mutual reactions before contacting the agents with polluted bodies, and improves the effect of in-situ restoration.

Description

A drill pipe device for mixed injection of multiple medicaments

technical field

The invention relates to a design of a mixed injection drill rod used for soil and groundwater pollution restoration, and belongs to the technical field of environmental restoration.

Background technique

With the rapid development of the economy, the use of a large number of chemical substances has caused soil and groundwater pollution to varying degrees. And due to the leaching of rainwater and the fluctuation of groundwater level, it will also cause cross-contamination of soil and groundwater. Generally speaking, typical pollutants in soil and groundwater include: inorganic and organic pollution, including NO ₃ ^- , NH ₄ ⁺ , heavy metals Pb, Cr, As, etc., benzene series, petroleum hydrocarbons, polychlorinated biphenyls, pesticides Wait. These pollutants are often highly toxic and carcinogenic, so it is necessary to restore these polluted soil and groundwater through reasonable technical means.

At present, soil and groundwater remediation technologies mainly include ex-situ remediation and in-situ remediation. Ectopic remediation involves excavating, transporting, and remediating contaminated soil. This repair method not only has a large workload, but also causes secondary pollution of the air, and may also affect the surrounding residents due to the odorous products produced by the action of microorganisms. Compared with ex-situ remediation technology, in-situ remediation has the advantages of protecting the structure of the contaminated site, reducing the amount of remediation work, and lowering the remediation cost. In situ restoration includes in situ bioremediation, phytoremediation, chemical restoration, etc. These technologies often require in-situ injection of suitable biological agents or chemical agents into soil and groundwater, so that the organisms or agents are fully mixed with soil and groundwater to achieve the purpose of remediation.

The traditional injection technology is carried out by pressing down the injection rod, which is not only inefficient, but also difficult to penetrate hard strata such as sand and gravel layers, and the vibration is strong. Later, there was an improved method of in-situ injection using the hydraulic system, which improved the stability and work efficiency of the equipment.

However, the medicaments needed in in situ repair technology are often the joint action of two or more medicaments, such as Fenton’s reagent commonly used in in situ chemical oxidation, which consists of the main medicament H ₂ O ₂ and an activator. The existing construction technology of Fenton's reagent injection is to mix the reagents and inject them into soil and groundwater through injection wells. However, the reaction speed of the main agent and the activator is very fast. If it is mixed in advance and then injected, the oxidative property will be greatly reduced before it comes into contact with the pollutants, and effective hydroxyl radical OH cannot be produced well, and the effect of repairing pollutants is also low. will be much lower than expected.

Therefore, it is necessary to design an in-situ injection device that can mix two or more agents underground to reduce the interaction between the agents, so that the agents can maintain the best drug properties when they contact the polluted body, and achieve the best repair effect.

Contents of the invention

The object of the present invention is to address the deficiencies of the prior art, and provide a drill pipe device for in-situ injection of soil and groundwater, which realizes the mixing of various agents underground, reduces the consumption of interactions between agents and pollutants, and improves the original bit repair effect.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A drill rod device for mixed injection of various medicaments, including an outer rod, an inner rod and a drill bit. The outer rod and the inner rod are both hollow and socketed together. The gap between the outer rod and the inner rod forms a first cavity; the upper part of the outer rod is provided with a first medicament connection port, and the first medicament connection port communicates with the first cavity; the inner wall of the bottom of the outer rod is provided with a step, which closes the first cavity together with the outer wall of the inner rod cavity; the upper part of the inner rod is provided with a second medicament connection port, and the second medicament connection port communicates with the cavity of the inner rod; the drill bit is connected with the outer rod, and the inside of the drill bit is provided with a second cavity, and the second cavity It communicates with the cavity of the inner rod; the side walls of the first cavity and the second cavity are respectively provided with injection holes communicating with the outside.

Further, an extended connecting rod is also provided between the outer rod and the drill bit, and the extended connecting rod includes an extended outer rod and an extended inner rod that are socketed together. Both the extended outer rod and the extended inner rod are hollow structures. The cavity formed between them communicates with the first cavity, and the bottom inner wall of the extended outer rod is provided with a step, which together with the outer wall of the extended inner rod closes the first cavity.

Preferably, both ends of the elongated connecting rod are configured as tenon structures, which are respectively connected with the outer rod and the drill bit. Multiple elongated connecting rods can be used.

Further, a return spring is provided at the bottom of the second cavity, and a check valve sleeve is installed on the return spring; when the check valve sleeve is in the reset position, it blocks the injection hole of the second cavity.

Further, the injection holes of the first cavity and the second cavity are arranged obliquely, and the emission angles of the two injection holes intersect outside the drill pipe device.

Further, a sealing ring is provided at the sealing part of the first cavity.

Further, a high-pressure nozzle is arranged in the injection hole.

Preferably, a hydraulic hose is connected to the upper part of the inner rod, and a second medicament connection port is provided on the hydraulic hose.

Compared with the prior art, the present invention has the following advantages:

(1) It has a good repair effect on soil and groundwater. Two or more agents are mixed while in contact with pollutants to achieve the strongest drug and the best effect;

(2) By adding different repair agents, controlling different pressures, and adjusting the angle and spacing of the nozzles, in-situ repairs at different depths and with different pollutants can be achieved;

(3) The device of the present invention is convenient for construction. The integration of drilling, drilling and injection repair has been realized.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention, (a) is an overall structural diagram, and (b) is an enlarged view of the circled area in (a). Among them, 1-drill bit assembly; 2-extended inner rod; 3-extended drill rod; 4-top inner rod; 5-top outer rod; 6-hydraulic pipe; 7-straight joint; 8-right angle joint; 9-drill bit; 10-return spring; 11-O ring; 12-check valve sleeve; 13-high pressure nozzle.

Fig. 2 is a working schematic diagram of the embodiment of the present invention.

detailed description

The accompanying drawing discloses the specific structure of an embodiment of the present invention without limitation, and the present invention will be further described below in conjunction with the accompanying drawings.

The drill pipe device of the present invention is not only a carrier of chemicals, but also an actuator for drilling and perforating, and is used for drilling, perforating and injecting reagents on polluted bodies in soil and groundwater remediation technology. The injection requirements of different depths of pollution sources can be adapted by using single or multiple extended connecting rods.

As shown in Figure 1, the drill pipe of this embodiment is designed as a double-layer hollow casing structure. The top outer rod 5 and the top inner rod 4 are connected by threads, the extended outer rod 3 and the drill bit assembly 1 are connected by NPT threads, and the extended inner rod 2 and the drill bit assembly 1 are connected by common threads. The inner wall of the bottom of the extended outer rod 3 is provided with a step, and together with the outer wall of the extended inner rod 2, the bottom of the cavity between the outer rod and the inner rod is closed, and the O ring 11 ensures its tightness; at the same time, the top inner rod 4 The inner cavity of the inner rod 2 and the inner cavity of the lengthened inner rod 2 are communicated with the cavity inside the drill bit 9 . In this way, two relatively closed cavities can be formed, which are used to transport the two kinds of medicines A and B.

In this embodiment, the ends of the elongated outer rod 3 and the elongated inner rod 2 are arranged as a tenon structure, one end of which is male and the other end is female, which can be superimposed and used according to the drilling depth.

One end of the top inner rod 4 can also be set as a female head or a male head structure, which is used in conjunction with the tenon structure of the lengthened inner rod 2 ; the other end is connected with the hydraulic pipe 6 . Preferably, the hydraulic line 6 is a hose, since its length can accommodate the cumulative length difference between the inner and outer rods. One end of the hydraulic pipe 6 is connected with the top inner rod 4, and the other end is threaded with the top outer rod 5 through a right-angle joint 8, and the right-angle joint 8 is connected with the medicament B. A straight-through joint 7 is welded on the top outer rod 5 in addition, and the straight-through joint 7 is connected with the medicament A.

The drill bit 9 is provided with 2-5 injection ports which are connected to the injection cavity of the medicament A and which are inclined upwards, and 2-5 injection ports which are connected to the injection cavity of the medicament B and which are inclined downwards. These two groups of injection ports are located in different The flat surface allows the agent to mix quickly after being sprayed into the polluted body. All welding a high-pressure nozzle 13 in each ejection port. Among them, the inclination angle, the number of injection ports and the vertical distance between two groups of injection ports can be freely selected and arranged according to the actual geological conditions.

A back-moving spring 10 and a check valve sleeve 12 are arranged at the bottom of the drill bit inner chamber to prevent groundwater from flowing back. An O-ring 11 can be arranged between the check valve sleeve 12 and the inner chamber of the drill bit to ensure its tightness. When the medicine in the medicine B injection cavity reaches the set pressure, the check valve sleeve 12 will be opened, and the medicine B can be ejected from the injection port. When the pressure is lower than the set pressure, the return spring 10 will reset the check valve sleeve 12, The injection port can be blocked to prevent groundwater from flowing back.

As shown in Figure 2, when the drill pipe device of the present embodiment is in operation, when the drill bit 9 reaches the contaminated part, the medicament A and the medicament B can be injected respectively at the same time, and the two medicaments are ejected from the injection ports through their respective delivery chambers. The two agents are mixed at the agent mixing surface, which can effectively ensure the time for repairing the pollution, and solve the problem of loss of medicinal properties when the agents are mixed first and then injected into the polluted body.

The above embodiments are only preferred specific implementations of the present invention. These specific implementations are all based on different implementations under the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Anyone familiar with the technology Within the technical scope disclosed in the present invention, any changes or substitutions that can be easily conceived by those skilled in the art should fall within the protection scope of the present invention, such as the technical solution of setting a multi-layer sleeve structure to achieve more kinds of medicament mixing.

Claims (9)

1. A drill rod device for mixed injection of various medicaments, comprising an outer rod, an inner rod and a drill bit, characterized in that the outer rod and the inner rod are both hollow structures and are socketed together, and the outer rod and the inner rod are connected together. The gap between them forms a first cavity; the upper part of the outer rod is provided with a first medicament connection port, and the first medicament connection port communicates with the first cavity; the inner wall of the bottom of the outer rod is provided with a step, which is connected with the inner rod The outer wall seals the first cavity together; the upper part of the inner rod is provided with a second medicament connection port, and the second medicament connection port communicates with the cavity of the inner rod; the drill bit is connected with the outer rod, and the inside of the drill bit is provided with a second cavity. cavity, and the second cavity communicates with the cavity of the inner rod; the side walls of the first cavity and the second cavity are respectively provided with injection holes communicating with the outside. 2. A drill rod device for mixed injection of various medicaments according to claim 1, characterized in that, an extension connecting rod is provided between the outer rod and the drill bit, and the extension connecting rod includes The extended outer rod and the extended inner rod are both hollow structures, and the cavity formed between them communicates with the first cavity. The outer walls together close the first cavity. 3 . The drill rod device for mixed injection of multiple medicaments according to claim 2 , characterized in that, both ends of the elongated connecting rod are configured as mortise structures, which are respectively connected with the outer rod and the drill bit. 4 . 4 . The drill rod device for mixed injection of multiple medicaments according to claim 3 , wherein multiple elongated connecting rods are used. 4 . 5. A drill pipe device for mixed injection of various medicaments according to claim 1, characterized in that a return spring is provided at the bottom of the second cavity, and a check valve sleeve is installed on the return spring; When the check valve sleeve is in the reset position, it blocks the injection hole of the second cavity. 6. A drill pipe device for mixed injection of various medicaments according to claim 1, characterized in that the injection holes of the first cavity and the second cavity are inclined, and the injection holes of the two are inclined. The outgoing angle intersects the outside of the drill pipe assembly. 7 . The drill rod device for mixed injection of multiple medicaments according to claim 1 , wherein a sealing ring is provided at the sealing part of the first cavity. 7 . 8 . The drill pipe device for mixed injection of multiple medicaments according to any one of claims 1 to 6 , wherein a high-pressure nozzle is arranged in the injection hole. 9. A drill rod device for mixing and injecting multiple medicaments according to any one of claims 1 to 6, wherein a hydraulic hose is connected to the upper part of the inner rod, and a second hydraulic hose is provided on the hydraulic hose. Two drug connection port.