Drilling double-plug water pressure test device suitable for irregular hole wall

Abstract

The utility model discloses a drill hole double-plug water pressure test device suitable for irregular hole walls, which comprises a drill rod main body, an internal thread pipe and a hand pump, the internal thread pipe is sleeved with an annular air bag, the lower end of the internal thread pipe is provided with a water outlet pipe, the upper end of the water outlet pipe is in threaded connection with the internal thread pipe, the water outlet pipe is provided with a plurality of water outlet holes, and the hand pump is connected with the water outlet pipe. A threaded sleeve is arranged at the lower end of the water outlet pipe and is in threaded connection with the bottom end of the water outlet pipe, a fixing base is installed at the bottom end of the threaded sleeve, a blocking air bag is installed at the bottom of the fixing base, a connecting hose is communicated between the blocking air bag and the annular air bag, and an air conveying pipe is communicated with the annular air bag; one end of the air delivery pipe away from the annular airbag is fixedly connected with the air outlet end of the hand pump. The device has the beneficial effects that the device is convenient to disassemble and assemble, the size of the device is reduced after the device is disassembled, the device is convenient to store and carry, the water pressure test operation is simpler and more convenient, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogeological tests, in particular to a drilling double-plug water pressure test device suitable for irregular hole walls. Background Art

[0002] A borehole water pressure test uses a waterstop plug to isolate a specific length of the borehole. This section serves as the water pressure test area. As a common method in hydrogeological testing, water pressure testing is often used to obtain formation hydrogeological parameters and assess grouting effectiveness. The accuracy of water pressure test results is affected by several factors, with waterstopping in the water pressure section having a particularly significant impact.

[0003] The existing water pressure test device is large in size, difficult to disassemble and assemble, inconvenient to carry, has complicated procedures, low work efficiency, affects the progress of the test, and has a general water-stopping effect, which has a significant impact on the accuracy of the test.

[0004] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and to design a double-plug water pressure test device for drilling holes with irregular hole walls.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A double-plug water pressure test device for drilling with irregular hole walls, comprising a drill rod body, an internally threaded tube and a hand pump, the upper end of the internally threaded tube being threadedly connected to the tail of the drill rod body, an annular airbag being sleeved on the internally threaded tube, a water outlet pipe being provided at the lower end of the internally threaded tube, the upper end of the water outlet pipe being threadedly connected to the internally threaded tube, a plurality of water outlet holes being provided on the water outlet pipe, a threaded sleeve being provided at the lower end of the water outlet pipe, the threaded sleeve being threadedly connected to the bottom end of the water outlet pipe, a fixing seat being installed at the bottom end of the threaded sleeve, a blocking airbag being installed at the bottom of the fixing seat, a connecting hose being connected between the blocking airbag and the annular airbag, an air supply pipe being connected to the annular airbag, and an end of the air supply pipe being fixedly connected to the air outlet end of the hand pump away from the annular airbag.

[0008] Further, it is characterized in that a connecting seat is installed on the side wall of the water outlet pipe, the connecting seat is located on the water outlet hole on the side wall of the water outlet pipe, a pressure sensor is installed on the connecting seat, and a cable is connected to the pressure sensor, and the cable passes through the connecting seat, the water outlet hole, the water outlet pipe and extends out of the drill rod body in sequence.

[0009] Furthermore, the inner ring of the annular airbag is fixedly connected to the internal threaded tube, and a wear-resistant layer is bonded to the surface of the annular airbag and the blocking airbag.

[0010] Furthermore, the outer diameter of the annular airbag is the same as the outer diameter of the blocking airbag, and the wear-resistant layer is made of a material that is soft, wear-resistant, ductile, and has strong water-stopping ability.

[0011] Furthermore, the diameter of the water outlet pipe is the same as the diameter of the drill rod body, the water outlet pipe is connected to the drill rod body through an internal threaded pipe, the water outlet pipe is a pressure-resistant steel pipe, and the connecting hose and the air pipe are both pressure-resistant hoses.

[0012] Compared with the existing technology, this technical solution has the following beneficial effects:

[0013] The outlet pipe is connected to the drill pipe body through an internal threaded pipe, and the threaded sleeve on the sealing airbag is threadedly connected to the bottom end of the outlet pipe, which is convenient for disassembly and assembly. After disassembly, the volume of the device is reduced, making it convenient to store and carry the device;

[0014] The annular airbag and the blocking airbag are pressurized by a hand pump, so that the annular airbag and the blocking airbag are expanded to fill the hole wall. The annular airbag and the blocking airbag are completely fitted with the hole wall to play a water-stopping role, with a good sealing and water-stopping effect, avoiding air and water leakage. It is suitable for drilling holes of different specifications. Clean water is pressed into the test section through the drill pipe body, the internal threaded pipe and the water outlet pipe to perform a water pressure test, which simplifies the replacement work during the test, makes the water pressure test operation easier, and improves work efficiency.

[0015] Monitor the pressure of the test section through the pressure sensor, detect whether there is any pressure loss, detect the drilling condition, power the pressure sensor through the cable and transmit data;

[0016] The wear-resistant layer prevents the protrusions on the hole wall from causing damage to the annular airbag and the sealing airbag, prevents the annular airbag and the sealing airbag from leakage, improves the sealing and water-stopping effect, and increases the service life. The wear-resistant layer is connected by bonding, which facilitates the replacement of the wear-resistant layer and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a double-plug water pressure test device for drilling holes with irregular hole walls, as described in the utility model.

[0018] Figure 2 This is an enlarged view of the annular airbag and the blocking airbag.

[0019] Figure 3 This is an enlarged cross-sectional view of the outlet pipe.

[0020] In the figure: 1. Drill pipe body; 2. Internally threaded pipe; 3. Hand pump; 4. Annular airbag; 5. Water outlet pipe; 6. Water outlet hole; 7. Threaded sleeve; 8. Fixing seat; 9. Sealing airbag; 10. Connecting hose; 11. Air pipe; 12. Connecting seat; 13. Pressure sensor; 14. Cable; 15. Wear-resistant layer. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0023] The utility model provides Figure 1-3 The shown device is a double-plug water pressure test device for drilling with irregular hole walls, comprising a drill pipe body 1, an internally threaded tube 2 and a hand pump 3. The upper end of the internally threaded tube 2 is threadedly connected to the tail of the drill pipe body 1, and an annular airbag 4 is sleeved on the internally threaded tube 2. A water outlet pipe 5 is provided at the lower end of the internally threaded tube 2. The upper end of the water outlet pipe 5 is threadedly connected to the internally threaded tube 2, and a plurality of water outlet holes 6 are provided on the water outlet pipe 5. A threaded sleeve 7 is provided at the lower end of the water outlet pipe 5, and the threaded sleeve 7 is threadedly connected to the bottom end of the water outlet pipe 5. A fixing seat 8 is installed at the bottom of the threaded sleeve 7, and a blocking airbag 9 is installed at the bottom of the fixing seat 8. A connecting hose 10 is connected between the blocking airbag 9 and the annular airbag 4. An air supply pipe 11 is connected to the annular airbag 4, and the air supply pipe 11 is fixedly connected to the air outlet end of the hand pump 3 at one end away from the annular airbag 4.

[0024] After the hole is drilled, the drill bit on the drill rod body 1 is removed, the internal threaded tube 2 is threadedly connected to the tail of the drill rod body 1, and the upper end of the water outlet pipe 5 is threadedly connected to the internal threaded tube 2, and the threaded sleeve 7 on the blocking air bag 9 is threadedly connected to the bottom end of the water outlet pipe 5, which is convenient for disassembly and assembly. After disassembly, the volume of the device is reduced, which is convenient for storage and carrying. The hand pressure pump 3 is placed on the bottom surface, and the annular air bag 4, the water outlet pipe 5 and the blocking air bag 9 are brought to the corresponding depth through the drill rod body 1. The operator operates the hand pressure pump 3 to pressurize the annular air bag 4 through the air supply pipe 11, and the annular air bag 4 and the blocking air bag 9 are pressurized by the air supply pipe 11. The connecting hose 10 is connected, and the annular airbag 4 and the blocking airbag 9 are pressurized at the same time, so that the annular airbag 4 and the blocking airbag 9 are expanded to fill the hole wall. The annular airbag 4 and the blocking airbag 9 are completely in contact with the hole wall to stop water, and clean water is pressed into the drill pipe body 1. The clean water enters the water outlet pipe 5 through the internal threaded tube 2, and then fills the test section through the water outlet hole 6 to perform a water pressure test. After the test is completed, the pressure is released by the hand pump 3, so that the annular airbag 4 and the blocking airbag 9 return to normal, and the drill pipe body 1 is used to move to the next test section, which simplifies the replacement work during the test, makes the water pressure test operation easier, and improves work efficiency.

[0025] Refer to the instruction manual Figure 1 and instructions attached Figure 3 A connecting seat 12 is installed on the side wall of the water outlet pipe 5, and the connecting seat 12 is located on the water outlet hole 6 on the side wall of the water outlet pipe 5. A pressure sensor 13 is installed on the connecting seat 12, and a cable 14 is connected to the pressure sensor 13. The cable 14 passes through the connecting seat 12, the water outlet hole, and the water outlet pipe 5 in sequence and extends out of the drill pipe body 1.

[0026] During the water pressure test, the pressure of the test section is monitored by the pressure sensor 13 to detect whether there is any pressure loss and the drilling condition. The pressure sensor 13 is powered and data is transmitted via the cable 14 .

[0027] Refer to the instruction manual Figure 1 and instructions attached Figure 2 The inner ring of the annular airbag 4 is fixedly connected to the internal threaded tube 2, and a wear-resistant layer 15 is bonded to the surface of the annular airbag 4 and the blocking airbag 9.

[0028] The wear-resistant layer 15 on the annular airbag 4 and the sealing airbag 9 fits tightly with the hole wall, preventing the protrusions on the hole wall from causing damage to the annular airbag 4 and the sealing airbag 9, and preventing the annular airbag 4 and the sealing airbag 9 from leaking, thereby improving the sealing and water-stopping effect and increasing the service life. The wear-resistant layer 15 is connected by bonding, which facilitates the replacement of the wear-resistant layer 15 and improves work efficiency.

[0029] Refer to the instruction manual Figure 2The outer diameter of the annular airbag 4 is the same as the outer diameter of the blocking airbag 9, and the wear-resistant layer 15 is made of a material that is soft, wear-resistant, ductile, and has strong water-stopping ability.

[0030] The wear-resistant layer 15 has high strength and long service life.

[0031] Refer to the instruction manual Figure 1 and instructions attached Figure 3 The diameter of the water outlet pipe 5 is the same as that of the drill rod body 1. The water outlet pipe 5 is connected to the drill rod body 1 through an internal threaded pipe 2. The water outlet pipe 5 is made of a pressure-resistant steel pipe, and the connecting hose 10 and the air pipe 11 are both made of pressure-resistant hoses.

[0032] The water outlet pipe 5 is connected to the drill rod body 1 through the internal threaded pipe 2. During the water pressure test, clean water enters the water outlet pipe 5 through the drill rod body 1 and the internal threaded pipe 2. The water outlet pipe 5, the connecting hose 10 and the air pipe 11 have high pressure resistance, which avoids damage and increases the service life.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A double-plug water pressure test device for drilling holes with irregular hole walls, comprising a drill rod body (1), an internally threaded tube (2) and a hand pump (3), wherein the upper end of the internally threaded tube (2) is threadedly connected to the tail end of the drill rod body (1), and is characterized in that: An annular airbag (4) is sleeved on the internal threaded tube (2), a water outlet pipe (5) is provided at the lower end of the internal threaded tube (2), the upper end of the water outlet pipe (5) is threadedly connected to the internal threaded tube (2), a plurality of water outlet holes (6) are provided on the water outlet pipe (5), a threaded sleeve (7) is provided at the lower end of the water outlet pipe (5), the threaded sleeve (7) is threadedly connected to the bottom end of the water outlet pipe (5), a fixing seat (8) is installed at the bottom end of the threaded sleeve (7), a blocking airbag (9) is installed at the bottom of the fixing seat (8), a connecting hose (10) is connected between the blocking airbag (9) and the annular airbag (4), an air supply pipe (11) is connected to the annular airbag (4), and the air supply pipe (11) is fixedly connected to the air outlet end of the hand pump (3) at one end away from the annular airbag (4).

2. The double-plug water pressure test device for drilling holes with irregular hole walls according to claim 1, characterized in that: A connecting seat (12) is installed on the side wall of the water outlet pipe (5), and the connecting seat (12) is located on the water outlet hole (6) on the side wall of the water outlet pipe (5). A pressure sensor (13) is installed on the connecting seat (12), and a cable (14) is connected to the pressure sensor (13). The cable (14) sequentially passes through the connecting seat (12), the water outlet hole, and the water outlet pipe (5) and extends out of the drill pipe body (1).

3. The double-plug water pressure test device for drilling holes with irregular hole walls according to claim 1, characterized in that: The inner ring of the annular airbag (4) is fixedly connected to the internal threaded tube (2), and a wear-resistant layer (15) is bonded to the surface of the annular airbag (4) and the blocking airbag (9).

4. The double-plug water pressure test device for drilling holes with irregular hole walls according to claim 3, characterized in that: The outer diameter of the annular airbag (4) is the same as the outer diameter of the blocking airbag (9), and the wear-resistant layer (15) is made of a material that is soft, wear-resistant, ductile, and has strong water-stopping ability.

5. The double-plug water pressure test device for drilling holes with irregular hole walls according to claim 1, characterized in that: The diameter of the water outlet pipe (5) is the same as that of the drill rod body (1). The water outlet pipe (5) is connected to the drill rod body (1) via an internal threaded pipe (2). The water outlet pipe (5) is made of a pressure-resistant steel pipe, and the connecting hose (10) and the gas pipe (11) are both made of pressure-resistant hoses.

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