CN221664697U - Pressure grouting device for grouting construction in directional drilling - Google Patents

Abstract

The utility model discloses a pressure grouting device for grouting construction in directional drilling, which comprises a grouting cylinder, wherein an annular sealing capsule communicated with the grouting cylinder is arranged on the outer side of the grouting cylinder in a surrounding mode, a protection ring matched with the annular sealing capsule is arranged on the outer side of the grouting cylinder, a pressurizing and non-return mechanism is arranged at one end of the grouting cylinder, and a nozzle is arranged on the pressurizing and non-return mechanism. The utility model has the advantages that: the grouting material can not flow back between the walls of the drilled holes, and the grouting material pressure is high.

Description

A pressure grouting device for grouting construction in directional drilling

Technical Field

The utility model relates to the technical field of drilling grouting, in particular to a pressure grouting device used for grouting construction in directional drilling.

Background Art

During the guidance and expansion of directional drilling, if there are poor geological conditions such as cavities and cracks, the slurry leakage in the borehole will be serious, and the drilling trajectory will also deviate seriously in the poor geological conditions. In order to meet the requirements of directional drilling construction, a grouting pump is required and the hollow drill rod of the directional drill is used as a grouting pipe. The grouting drill rod is pushed to the poor geological conditions by the drilling rig for grouting reinforcement. This method has the following problems: (1) Most of the poor geological conditions are far away from the drilling position of the drilling rig. The grouting material has serious pressure loss after long-distance transportation through the hollow drill rod. The grouting pressure at the slurry outlet at the end of the drill rod is small and unstable; (2) Since the trajectory of the directional drilling hole is generally a horizontal curve, the grouting material is easy to flow back from the gap between the borehole wall and the grouting drill rod after being ejected at the end of the drill rod, and cannot fully reach the poor geological conditions. Poor geological conditions such as cavities and cracks cannot be continuously reinforced.

Utility Model Content

The technical problem to be solved by the utility model is to overcome the above difficulties and provide a pressure grouting device for grouting construction in directional drilling holes, which can prevent grouting material from flowing back between the borehole walls and has high grouting material pressure.

In order to solve the above technical problems, the technical solution provided by the utility model is: a pressure grouting device for grouting construction in directional drilling, comprising a grouting barrel, an annular sealing capsule connected to the grouting barrel is arranged around the outer side of the grouting barrel, a protective ring cooperating with the annular sealing capsule is arranged on the outer side of the grouting barrel, a pressure boosting and anti-return mechanism is arranged at one end of the grouting barrel, and a nozzle is arranged on the pressure boosting and anti-return mechanism.

As an improvement, a connecting pipe is fixedly provided on the grouting barrel and passes through the grouting barrel and communicates with the annular sealing capsule.

As an improvement, the connecting tube and the annular sealing capsule are bonded together by glue.

As an improvement, the protective ring includes a fixed protective ring fixed on the grouting tube and a movable protective ring sleeved on the grouting tube, and the movable protective ring is connected to the grouting tube via a positioning pin.

As an improvement, a female buckle is provided at one end of the grouting tube away from the pressure-boosting and non-return mechanism.

As an improvement, the boosting check mechanism includes a sealing check ring arranged in the grouting tube and a guide rod arranged in the sealing check ring, an elastic spring is sleeved on the guide rod, and a positioning rod is arranged on the outer side of the elastic spring.

Compared with the prior art, the advantages of the utility model are: 1. The protective ring can fix the annular sealing capsule; 2. The annular sealing capsule and the connecting pipe cooperate to seal the borehole wall; 3. The pressurized check mechanism can keep the grouting material at a relatively high pressure for spraying.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structural diagram of the utility model.

As shown in the figure: grouting cylinder 1, annular sealing capsule 2, protective ring 3, fixed protective ring 301, movable protective ring 302, positioning pin 303, connecting pipe 4, sealing check ring 5, guide rod 6, elastic spring 7, positioning rod 8, nozzle 9, female buckle 10, and pressurized check mechanism 11.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Embodiment 1:

In conjunction with Figure 1, a pressure grouting device for grouting construction in directional drilling comprises a grouting tube 1, and an annular sealing capsule 2 connected to the grouting tube 1 is arranged around the outer side of the grouting tube 1. After the annular sealing capsule 2 is pressurized and expanded, it fits tightly with the borehole wall to achieve sealing. The friction between the annular sealing capsule 2 and the hole wall is sufficient to withstand the grouting pressure, ensuring that the grouting material cannot flow back through the gap between the borehole wall and the grouting drill rod, thereby achieving closed grouting. A protective ring 3 cooperating with the annular sealing capsule 2 is arranged on the outer side of the grouting tube 1, and a pressure-boosting check mechanism 11 is arranged at one end of the grouting tube 1, and a nozzle 9 is arranged on the pressure-boosting check mechanism 11. A female buckle 10 is arranged at the end of the grouting tube 1 away from the pressure-boosting check mechanism 11, and the female buckle 10 is convenient for connecting with the drill rod.

The grouting cylinder 1 is fixedly provided with a connecting pipe 4 penetrating through the grouting cylinder 1 and communicating with the annular sealing capsule 2 , and the connecting pipe 4 and the annular sealing capsule 2 are bonded by glue.

The protective ring 3 includes a fixed protective ring 301 fixed on the grouting tube 1 and a movable protective ring 302 sleeved on the grouting tube 1. The movable protective ring 302 is connected to the grouting tube 1 via a positioning pin 303. The protective ring 3 can effectively protect the safe pushing of the pressure grouting device in the drilled hole and prevent the drilled hole wall from scratching and damaging the annular sealing capsule 2. The design of the movable protective ring 303 also facilitates the installation and disassembly of the annular sealing capsule 2.

The pressurized check mechanism 11 includes a sealing check ring 5 arranged in the grouting tube 1 and a guide rod 6 arranged in the sealing check ring 5. An elastic spring 7 is sleeved on the guide rod 6, and a positioning rod 8 is arranged on the outer side of the elastic spring 7.

During the specific implementation of the utility model, the device is connected to the slurry outlet at the end of the drill pipe through the female buckle 10. After the slurry is injected, it first fills the grouting tube 1, and then fills the annular sealing capsule 2 through the connecting pipe 4. After the annular sealing capsule 2 is pressurized and expanded, it fully fills the gap between the outer shell of the grouting tube 1 and the wall of the drill hole. As the grouting amount increases, the annular sealing capsule 2 continues to expand and squeezes the hole wall to generate friction, and the gap between the outer shell of the grouting tube 1 and the hole wall is sealed; the grouting amount further increases, the slurry pressure in the grouting tube 1 continues to increase, the grouting material pressure pushes the sealing check ring 5 to move outward to the positioning rod 8, the booster check structure 11 opens, and the booster slurry enters the cavity or crack through the nozzle 9, and the pressure grouting is completed.

Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A pressure slip casting device for slip casting construction in directional drilling, including a slip casting section of thick bamboo, its characterized in that: the outer side of the grouting cylinder is surrounded by an annular sealing capsule communicated with the grouting cylinder, the outer side of the grouting cylinder is provided with a protection ring matched with the annular sealing capsule, one end of the grouting cylinder is provided with a pressurizing non-return mechanism, and the pressurizing non-return mechanism is provided with a nozzle.

2. The pressure grouting device for directional drilling internal grouting construction according to claim 1, wherein: and a connecting pipe which penetrates through the grouting cylinder and is communicated with the annular sealing capsule is fixedly arranged on the grouting cylinder.

3. The pressure grouting device for directional drilling internal grouting construction according to claim 2, wherein: the connecting pipe and the annular sealing capsule are bonded through glue.

4. The pressure grouting device for directional drilling internal grouting construction according to claim 1, wherein: the protection ring comprises a fixed protection ring fixedly arranged on the grouting cylinder and a movable protection ring sleeved on the grouting cylinder, and the movable protection ring is connected with the grouting cylinder through a locating pin.

5. The pressure grouting device for directional drilling internal grouting construction according to claim 1, wherein: one end of the grouting barrel, which is far away from the pressurizing and non-return mechanism, is provided with a female buckle.

6. The pressure grouting device for directional drilling internal grouting construction according to claim 1, wherein: the pressurizing non-return mechanism comprises a sealing non-return ring arranged in the grouting barrel and a guide rod arranged in the sealing non-return ring, an elastic spring is sleeved on the guide rod, and a positioning rod is arranged on the outer side of the elastic spring.