High-pressure injection drill bit for in-situ remediation of soil and groundwater pollution

Abstract

The utility model discloses a high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution, particularly relates to the technical field of environmental remediation, and comprises a drill body, a cavity is arranged in the drill body, the inner side of the cavity is connected with a high-pressure injection metal pipe, and an external thread ring is arranged on the inner wall of the bottom of the cavity and located on one side of the end portion of the high-pressure injection metal pipe. A connector connected to the exterior of the external thread ring is arranged at the end of the high-pressure injection metal pipe, an anti-loosening mechanism used for limiting the connector is arranged in the cavity, a through hole is formed in the position, located below the external thread ring, in the drill body, and a liquid medicine conveying cavity is formed in the position, located below the through hole, in the drill body. During use, the high-pressure injection metal tube can be prevented from falling off due to the fact that the connector and the external thread ring are loosened in the working process, and when the valve at the external connecting end of the high-pressure injection metal tube is closed, liquid medicine remaining in the high-pressure injection metal tube in the drill body can be discharged and cannot be excessively left.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of environmental remediation technology, more specifically, the utility model relates to a high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution. BACKGROUND

[0002] Soil and groundwater pollution technology can be divided into two ways of in-situ remediation and ex-situ remediation. Compared with ex-situ remediation, in-situ remediation can solve the problem of deep soil and groundwater pollution, and the in-situ disposal of pollutants avoids the secondary pollution problems such as deep foundation pit excavation and soil transportation, and has higher safety and economy. In-situ remediation of soil refers to a technology that injects chemicals and biological agents into the ground soil and groundwater pollution through high pressure for remediation. It is usually suitable for the remediation of heavy metals (such as hexavalent chromium), chlorinated organic matter, petroleum hydrocarbon, benzene, toluene, ethylbenzene, xylene, phenol, methyl tert-butyl ether (MTBE), chlorine-containing organic solvent, polycyclic aromatic hydrocarbon and most of the organic matter in the contaminated soil and groundwater. It is an important part of in-situ remediation of soil technology.

[0003] In-situ remediation of soil technology can be divided into two modes of injection well injection and direct push drilling injection. The key of direct push injection technology is the injection drill bit. The traditional direct push injection drill bit uses the drill bit itself as the cavity for injecting the agent. Since the drill bit itself has poor corrosion resistance, it cannot inject strong corrosive agents. At the same time, the injection drill hole on the drill bit lacks protection when drilling into the underground soil, and is easily blocked by soil, which can cause ineffective injection. When the injection of the agent is completed, the injection drill bit lacks anti-backflow design, which causes the agent to flow back into the drill bit, which can easily cause safety hazards.

[0004] Therefore, the patent with publication number CN212264161U discloses a high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution, mainly related to the field of environmental remediation technology. This technology relies on a direct push drill to ensure that the drill bit is not corroded by the agent and to protect the injection drill hole from being blocked and to prevent the backflow of the agent.

[0005] However, the anti-backflow structure design in the above-mentioned high-pressure injection drill bit has some deficiencies in actual use. The spring sealing structure used in the design will have some deficiencies in use. The liquid is pumped into the high-pressure injection pipe inside the pump body. When the injection volume is completed, the pump body is generally stopped or the valve is closed. This design of spring against valve makes it necessary to have a larger water pressure to open the spring again. When the pump body is stopped or the outer wall valve is closed, the water flow in the high-pressure injection pipe inside the drill body stops, the water pressure is small, the impact force on the spring is small, and too much liquid is left in the high-pressure injection pipe inside the drill body, causing waste. UTILITY MODEL CONTENTS

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a high pressure injection drill bit for in-situ remediation of soil and groundwater pollution.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a high pressure injection drill bit for in-situ remediation of soil and groundwater pollution, including the drill body, the inside of drill body is provided with cavity, the inside of cavity is connected with high pressure injection metal pipe, the bottom inner wall of cavity is located high pressure injection metal pipe's end side and is provided with the external thread ring of one side, the end of high pressure injection metal pipe is provided with the connector that connects in the external thread ring outside, the inside of cavity is provided with the anti -unscrewing mechanism for the limiting of connector, the inside of drill body is located below the through -hole of external thread ring, and the inside of drill body is located below the through -hole and is provided with the liquid medicine delivery chamber, the bottom of liquid medicine delivery chamber is annular and is communicated with a plurality of inclinedly arranged flow guide channels, the outer wall of drill body is provided with injection hole at the end position of each flow guide channel, the inside of liquid medicine delivery chamber is located below the through -hole and is provided with the anti -backflow mechanism.

[0008] As a further improvement of the utility model technical scheme, the inner surface of the connector is provided with an internal thread matched with the external thread structure of the external thread ring, the connector and the external thread ring are threadedly connected, and the external thread ring and the inner wall of the cavity are welded and fixed.

[0009] As a further improvement of the utility model technical scheme, the anti-unscrewing mechanism includes a fixed ring welded on the outer wall of the connector, limit rods are inserted into both ends of the fixed ring in the horizontal direction, a connecting rod is fixedly connected to the outer wall of the limit rods inside the cavity, an end of the limit rods is fixedly connected to a movable plate, a movable cavity is arranged in the horizontal direction on the outside of the movable plate in the inside of the drill body, and a spring is installed in the inside of the movable cavity.

[0010] As a further improvement of the utility model technical scheme, the two outer walls of the fixed ring are provided with clamping grooves at the end positions of the two limit rods.

[0011] As a further improvement of the utility model technical scheme, the connecting mode between the end of the connecting rod and the outer wall of the limit rod is welding.

[0012] As a further improvement of the utility model technical scheme, the anti-backflow mechanism includes a liquid blocking seat fixedly connected to the top inner wall of the liquid medicine delivery chamber, a fixed cavity is arranged in the inside of the liquid blocking seat, open portions are arranged at both ends of the liquid blocking seat and communicated with the fixed cavity, and a floating ball is installed in the inside of the fixed cavity.

[0013] As a further improvement of the utility model technical scheme, the cross-sectional diameter of the floating ball is greater than the cross-sectional diameter of the open portion.

[0014] The utility model discloses the beneficial effect of:

[0015] 1. Through setting anti -unthreading mechanism, can play the effect of locking and limiting to fixed ring in use, thereby avoiding the high pressure injection metal pipe falling off caused by the loosening between connecting head and outer thread ring in the working process, in the connecting process, the two connecting rods are pulled to the outside, the limit rod moves to the outside, the spring is compressed, when connecting head is twisted to the position that needs, the connecting rod is loosened, the spring resets and drives the limit rod to move to the inside, until the end of limit rod is clamped into the card slot on fixed ring and completes locking.

[0016] 2. Through setting backflow prevention mechanism, utilize the principle of buoyancy and utilize the float ball to block, make when the valve of high pressure injection metal pipe external connection end is closed, the liquid medicine enters the inside of fixed cavity under gravity, the float ball rises under the buoyancy of liquid medicine, and make the liquid medicine discharge from the opening portion of the bottom of liquid blocking seat, until the liquid medicine that can not support the buoyancy that the float ball rises in the high pressure injection metal pipe in the inside of drill body can discharge and will not cause too much residual. DRAWINGS

[0017] Figure 1 It is the sectional view of the utility model.

[0018] Figure 2 It is the external structure schematic view of the utility model.

[0019] Figure 3 It is the utility model Figure 1 The enlarged view of A part.

[0020] Figure 4 It is the utility model Figure 1 The enlarged view of B part.

[0021] The drawing sign is: 1, drill body;2, cavity;3, high pressure injection metal pipe;4, connecting head;5, outer thread ring;6, through -hole;7, liquid medicine delivery chamber;8, flow guide channel;9, injection hole;10, fixed ring;11, limit rod;12, card slot;13, connecting rod;14, movable plate;15, movable cavity;16, spring;17, liquid blocking seat;18, opening portion;19, fixed cavity;20, float ball. CONCRETE IMPLEMENTING METHOD

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0023] As attached Figures 1-4 The high-pressure injection drill bit shown in the figure for in-situ remediation of soil and groundwater pollution includes a drill body 1, a cavity 2 is provided inside the drill body 1, a high-pressure injection metal tube 3 is connected to the inside of the cavity 2, an external threaded ring 5 is provided on the inner wall of the bottom of the cavity 2, and the end of the high-pressure injection metal tube 3 is provided with a connector 4 connected to the outside of the external threaded ring 5. The interior of the cavity 2 is provided with an anti-loosening mechanism for limiting the connector 4, a through hole 6 is provided inside the drill body 1 below the external threaded ring 5, and a liquid medicine delivery chamber 7 is provided inside the drill body 1 below the through hole 6. The bottom of the liquid medicine delivery chamber 7 is annular and equidistantly connected with several inclined diversion channels 8, and the outer wall of the drill body 1 is provided with injection holes 9 at the end position corresponding to each diversion channel 8, and the interior of the liquid medicine delivery chamber 7 is provided with an anti-backflow mechanism below the through hole 6.

[0024] As attached Figure 1 and attached Figure 3 As shown, the inner surface of the connector 4 is provided with an internal thread that matches the external thread structure of the external thread ring 5. The connector 4 and the external thread ring 5 are threadedly connected, and the external thread ring 5 is welded and fixed to the inner wall of the cavity 2, which facilitates the connection between the high-pressure injection metal tube 3 and the external thread ring 5, and then facilitates the injection of external medical liquid into the interior of the drill body 1 through the high-pressure injection metal tube 3.

[0025] As attached Figure 1 and attached Figure 3 As shown, the anti-loosening mechanism includes a fixing ring 10 seamlessly welded to the outer wall of the connecting head 4, and both ends of the fixing ring 10 are inserted with limit rods 11 in the horizontal direction. The outer wall of the limit rod 11 is located on the inner side of the cavity 2 and is fixedly connected with a connecting rod 13, and the end of the limit rod 11 is fixedly connected with a movable plate 14. The interior of the drill body 1 is located outside the movable plate 14 and a movable cavity 15 is provided in the horizontal direction. A spring 16 is installed inside the movable cavity 15. The two outer walls of the fixing ring 10 are provided with card grooves 12 at the end positions of the two limit rods 11, and the connection between the end of the connecting rod 13 and the outer wall of the limit rod 11 is welded. The anti-loosening mechanism is convenient for locking and limiting the fixing ring 10 when in use, thereby avoiding loosening between the connecting head 4 and the external threaded ring 5 during operation, causing the high-pressure injection metal tube 3 to fall off.

[0026] As attached Figure 1 and attached Figure 4As shown, the backflow prevention mechanism includes a liquid blocking seat 17 fixedly connected to the inner wall of the top of the liquid delivery cavity 7, the inside of the liquid blocking seat 17 is provided with a fixed cavity 19, and the upper and lower ends of the liquid blocking seat 17 are provided with opening portions 18 in communication with the fixed cavity 19, a floating ball 20 is installed in the inside of the fixed cavity 19, the cross-sectional diameter of the floating ball 20 is greater than the cross-sectional diameter of the opening portion 18, and the floating ball 20 is used for blocking by using the principle of buoyancy, so that when the valve at the external connecting end of the high-pressure injection metal pipe 3 is closed, the liquid medicine remaining in the high-pressure injection metal pipe 3 inside the drill body 1 can be discharged without causing excessive residue.

[0027] Working principle: the utility model discloses a high pressure injection drill bit for in situ remediation of soil and groundwater pollution, and the specific structure is as shown in the description Figures 1-4 As shown, the backflow prevention mechanism includes a liquid blocking seat 17 fixedly connected to the inner wall of the top of the liquid delivery cavity 7, the inside of the liquid blocking seat 17 is provided with a fixed cavity 19, and the upper and lower ends of the liquid blocking seat 17 are provided with opening portions 18 in communication with the fixed cavity 19, a floating ball 20 is installed in the inside of the fixed cavity 19, the cross-sectional diameter of the floating ball 20 is greater than the cross-sectional diameter of the opening portion 18, and the floating ball 20 is used for blocking by using the principle of buoyancy, so that when the valve at the external connecting end of the high-pressure injection metal pipe 3 is closed, the liquid medicine remaining in the high-pressure injection metal pipe 3 inside the drill body 1 can be discharged without causing excessive residue.

[0028] Among them, the utility model discloses an embodiment drawing, only relate to the structure involved in the embodiment of the utility model, other structures can refer to the usual design, under the condition of not conflicting, the same embodiment and different embodiments of the utility model can be combined with each other;

[0029] Finally: the above only for preferred embodiment of the utility model has, and does not for limiting the utility model, any modification, equivalent replacement, improvement etc. that is made in the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A high pressure injection drill bit for in-situ remediation of soil and groundwater pollution, comprising a drill body (1), characterised in that: The inside of the drill body (1) is provided with a cavity (2), the inner side of the cavity (2) is connected with a high-pressure injection metal pipe (3), the bottom inner wall of the cavity (2) is provided with an external thread ring (5) on the side of the end of the high-pressure injection metal pipe (3), the end of the high-pressure injection metal pipe (3) is provided with a connector (4) connected outside the external thread ring (5), the inside of the cavity (2) is provided with an anti-loosening mechanism for limiting the connector (4), the inside of the drill body (1) is provided with a through hole (6) below the external thread ring (5), and the inside of the drill body (1) is provided with a drug liquid delivery cavity (7) below the through hole (6), the bottom of the drug liquid delivery cavity (7) is annularly and equidistantly communicated with a plurality of inclined flow guide channels (8), the outer wall of the drill body (1) is provided with an injection hole (9) at the position corresponding to the end of each flow guide channel (8), and the inside of the drug liquid delivery cavity (7) is provided with an anti-backflow mechanism below the through hole (6).

2. The high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution according to claim 1, characterized in that: The inner surface of the connector (4) is provided with an internal thread matched with the external thread structure of the external thread ring (5), the connector (4) and the external thread ring (5) are in threaded connection, and the external thread ring (5) and the inner wall of the cavity (2) are welded and fixed.

3. The high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution according to claim 1, characterized in that: The anti-loosening mechanism comprises a fixing ring (10) welded seamlessly on the outer wall of the connector (4), limit rods (11) are inserted into the two ends of the fixing ring (10) in the horizontal direction, the outer wall of the limit rod (11) is fixedly connected with a connecting rod (13) on the inner side of the cavity (2), and the end of the limit rod (11) is fixedly connected with a movable plate (14), the inside of the drill body (1) is provided with a movable cavity (15) outside the movable plate (14) in the horizontal direction, and the inside of the movable cavity (15) is provided with a spring (16).

4. The high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution according to claim 3, characterized in that: The two outer walls of the fixing ring (10) are provided with clamping grooves (12) at the positions corresponding to the ends of the two limit rods (11).

5. The high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution according to claim 3, characterized in that: The connecting mode between the end of the connecting rod (13) and the outer wall of the limit rod (11) is welding.

6. The high-pressure injection drill bit for in-situ remediation of soil and groundwater contamination according to claim 1, characterized in that: The anti-backflow mechanism comprises a liquid blocking seat (17) fixedly connected to the top inner wall of the drug liquid delivery cavity (7), the inside of the liquid blocking seat (17) is provided with a fixed cavity (19), the upper and lower ends of the liquid blocking seat (17) are provided with opening portions (18) communicated with the fixed cavity (19), and the inside of the fixed cavity (19) is provided with a floating ball (20).

7. The high-pressure injection drill bit for in-situ remediation of soil and groundwater pollution according to claim 6, characterized in that: The cross-sectional diameter of the floating ball (20) is greater than the cross-sectional diameter of the opening portion (18).

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