Expansion type self-sealing joint sleeve assembly device for drill pipe

Abstract

The invention relates to a drill pipe expansion type self-sealing joint sleeve assembly device, which comprises a water absorption expansion material, a force transmission plate, an elastic push rod, a fixed joint, a light spring, a door plate and a door seat, the water absorption expansion material is arranged in a guide groove below a drill pipe penetrating part in the door seat, the door plate is arranged above the drill pipe penetrating part, one end of the water absorption expansion material is fixed, and the other end of the water absorption expansion material is fixed. The elastic push rod is arranged in the rope groove, the top end of the elastic push rod is connected with a light spring, and the lower portion of the top of the elastic push rod is connected with a door plate through a hook. According to the automatic sealing device, automatic sealing can be achieved after sampling of the pipeline drill pipe is finished, and a safety guarantee is added for guaranteeing engineering quality, protecting the environment and guaranteeing public safety.

Description

Technical Field

[0001] The invention relates to a tunnel or pipeline external sampling mechanism, in particular to a drill pipe expansion type self-sealing joint sleeve component device at the end of the external sampling mechanism. Background Art

[0002] External sampling is one of the important means to conduct comprehensive inspection of tunnel or pipeline construction quality. Through sampling and analysis of the external environment, quality problems in the construction process can be discovered in a timely manner, and corresponding rectification measures can be taken to ensure that the project quality meets the design requirements and relevant standards.

[0003] External sampling is particularly important for some concealed projects, as it is difficult to inspect these projects directly after they are completed. External sampling can indirectly help us understand their construction quality and provide guarantees for the safe operation of the project.

[0004] Tunnel or pipeline construction may also have certain impacts on the surrounding environment, such as disrupting the ecological balance, polluting soil and water, etc. External sampling can timely monitor the impact of construction on the environment, take corresponding environmental protection measures, and reduce the damage to the environment caused by engineering construction.

[0005] Tunnels or pipelines are usually important infrastructures, and their safe operation is related to the safety of life and property of the public. External sampling can timely discover potential safety hazards, such as geological disasters, structural damage, etc., and take corresponding preventive measures to ensure public safety.

[0006] In addition, for some pipelines involved in the transportation of hazardous chemicals, external sampling work can monitor the environment around the pipelines to ensure that emergency measures can be taken in a timely manner when accidents such as leaks occur, thereby reducing the harm of accidents to the environment and the public.

[0007] In summary, external sampling plays an important role and significance in completed or under-construction tunnel or pipeline projects. It can not only ensure the quality of the project and protect the environment, but also ensure public safety and provide strong support for the safe operation of the tunnel or pipeline.

[0008] Therefore, daily sampling is essential. Especially when sampling in an environment where the surrounding water content is considered low, after sampling, the drill rod is pulled out, and the valves may be missed for inspection. If there are valves that are not tightly closed or not closed, once the surrounding soil water content is abnormal, the water outside the pipeline will flow quickly into the tunnel pipeline along the expansion pipe. Once the water flow increases and there is no supervision, the water in the pipeline will accumulate more and more, which will have a serious impact on the facilities and personnel in the pipeline.

[0009] In view of the above situation, there is a need for a device that can achieve self-sealing function without external power source and without personnel supervision after sampling is completed and the valve is not closed or closed. Summary of the invention

[0010] In order to solve the above technical problems, the purpose of the present invention is to propose a drill pipe expansion self-sealing joint sleeve assembly device, which can realize automatic sealing after the pipeline drill pipe sampling is completed, thereby adding a safety guarantee to ensure project quality, environmental protection and public safety.

[0011] To achieve the above-mentioned purpose, the technical solution of the present invention is: a drill pipe expansion type self-sealing joint sleeve assembly device, including water-absorbing expansion material, a force transmission plate, an elastic push rod, a fixed joint, a lightweight spring, a door panel, and a door seat. A water-absorbing expansion material is arranged in a guide groove below the drill pipe in the door seat, and a door panel is arranged above. One end of the water-absorbing expansion material is fixed, and the other end is connected to the elastic push rod through the force transmission plate. The elastic push rod is placed in a rope groove, and the top of the elastic push rod is connected to the lightweight spring, and the bottom of the top is connected to the door panel through a hook.

[0012] Furthermore, the water-swellable material has a "concave" cross-section structure, and can squeeze the door panel after swelling due to water absorption, thereby improving the sealing effect.

[0013] Furthermore, the drill pipe expansion self-sealing joint sleeve assembly device is installed on the ball valve through a fixed joint.

[0014] Furthermore, when high-pressure water on the outside of the pipe segment continuously seeps through the ball valve and flows into the drill pipe expansion self-sealing joint sleeve assembly device, the water-absorbing and expanding material expands after absorbing water, and one side of the water-absorbing and expanding material is fixed, while the other side moves upward along the guide groove of the door seat, pushing the elastic push rod to move along the rope groove toward the lightweight spring, thereby compressing the lightweight spring; after being compressed for a certain distance, the door panel disengages from the hook, and the door panel falls under the action of its own weight, closing the original drilling channel, so that water cannot further flow out of the drilling channel.

[0015] The beneficial effects of the present invention are:

[0016] (1) No human intervention is required, and automatic sealing is achieved by utilizing the material’s own characteristics and gravity;

[0017] (2) Timely response, convenient processing, and the reduction of man-made accidents;

[0018] (3) It is convenient for sampling staff to find problems during inspection and facilitate subsequent evaluation;

[0019] (4) The water-swellable material can be recycled, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the drill pipe expansion self-sealing joint sleeve assembly device of the present invention when it is working;

[0021] Figure 2 It is a schematic diagram of the planar structure of the drill pipe expansion self-sealing joint sleeve assembly device of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 As shown in FIG. 2 , a drill pipe expansion self-sealing joint sleeve assembly device 100 of the present invention includes a water-absorbing and swelling material 1, a force transmission plate 2, an elastic push rod 3, a fixed joint 4, a lightweight spring 5, a door panel 6, a door seat 7, etc.

[0024] The door seat 7 is fixedly connected to the ball valve 9 through a fixed joint 4. A water-swelling material 1 is provided in the guide groove below the drill pipe in the door seat 7, and a door panel 6 is provided above. One end of the water-swelling material 1 is fixed, and the other end is connected to an elastic push rod 3 through a force transmission plate 2. The elastic push rod 3 is placed in a rope groove, and a lightweight spring 5 is connected to the top of the elastic push rod 3. The bottom of the top is connected to the door panel 6 through a hook.

[0025] This embodiment is attached Figure 1 The present invention is described by taking the structural form as an example.

[0026] Drill holes at designated positions on the shield segment, then place expansion pipe 8, then install ball valve 9 on expansion pipe 8, and install drill pipe expansion self-sealing joint assembly 100 of the present invention on ball valve 9 through fixed joint 4. After passing drill pipe 10 through the hole and completing the drilling operation, start to withdraw drill pipe 10, and when drill pipe 10 is withdrawn to the rear position of ball valve 9, stop moving, close ball valve 9, and then continue to withdraw drill pipe 10 until drill pipe 10 is pulled out.

[0027] When high-pressure water from the outside of the pipe segment continuously seeps through the ball valve 9 and flows into the device of the present invention, the water-swellable material 1 expands after absorbing water. Since one side of the water-swellable material 1 is in a fixed position, Figure 2 As shown, the water-swellable material 1 can only move along the guide groove of the door seat 7 to the other side (right direction in the figure), pushing the elastic push rod 3 to move along the rope groove toward the light spring 5, thereby compressing the light spring 5; after being compressed for a certain distance, the door panel 6 is disengaged from the hook and falls under the action of its own weight, closing the original drilling channel, so that water cannot flow out of the drilling channel further. The water-swellable material 1 has a "concave" cross-section structure, and after expansion, it can squeeze the door panel 6 to improve the sealing effect. The effect of automatically blocking the drilling pipe in an unattended situation is achieved.

[0028] The device is composed of dry water-absorbing and expanding materials, Ω-shaped plates, elastic push rods, fixed joints, lightweight springs, door panels, etc., and is installed at the rear end of the ball valve. After sampling, the drill rod is pulled out. After a period of time, when the moisture content of the surrounding soil suddenly becomes abnormal, the external water will flow into the device along the expansion tube. The water-absorbing and expanding material located below will expand rapidly when it encounters water. Due to the characteristics of the water-absorbing and expanding material itself, it will generate a certain expansion force and transmit the force to the elastic push rod through the Ω-shaped plate. The elastic push rod will move upward along the rope groove. Due to the force transmitted by the elastic push rod, it will press the fixed joint to compress the spring. When the spring is compressed to a certain distance, under the action of its own gravity, the door panel will break away from the fixed joint and fall into the groove below, which plays a role in sealing the pipeline and blocking the water flow.

[0029] When the staff inspected, they found that the door panel had fallen off, indicating that there was abnormal water content around this sampling point. At this time, the staff can push the fallen door panel up and clamp it on the fixed joint, and replace it with a new water-absorbing and expanding material that has been dried, so that they can continue to observe or use it at other sampling points.

Claims

1. A drill pipe expansion self-sealing sleeve assembly device, characterized in that: It includes water-swelling material, a force transmission plate, an elastic push rod, a fixed joint, a lightweight spring, a door panel and a door seat. Water-swelling material is arranged in a guide groove below the drill pipe in the door seat, and a door panel is arranged above. One end of the water-swelling material is fixed, and the other end is connected to the elastic push rod through the force transmission plate. The elastic push rod is placed in a rope groove, the top of the elastic push rod is connected to the lightweight spring, and the bottom of the top is connected to the door panel through a hook.

2. The drill pipe expansion self-sealing sleeve assembly device according to claim 1, characterized in that: The water-swelling material has a "concave" cross-section structure, and after expansion it can squeeze the door panel to improve the sealing effect.

3. The drill pipe expandable self-sealing sleeve assembly device according to claim 1 or 2, characterized in that: The drill pipe expansion self-sealing joint sleeve assembly device is installed on the ball valve through a fixed joint.

4. The drill pipe expandable self-sealing sleeve assembly device according to claim 3, characterized in that: When high-pressure water on the outside of the pipe segment continuously seeps through the ball valve and flows into the drill pipe expansion self-sealing joint sleeve assembly device, the water-absorbing and expanding material expands after absorbing water, and one side of the water-absorbing and expanding material is fixed, and the other side moves upward along the guide groove of the door seat, pushing the elastic push rod to move along the rope groove toward the lightweight spring, thereby compressing the lightweight spring; after being compressed for a certain distance, the door panel is disengaged from the hook, and the door panel falls under the action of its own weight, closing the original drilling channel, so that water cannot further flow out of the drilling channel.

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