Freezing method drilling and pressing test integrated device capable of automatically releasing pressure

Abstract

The utility model discloses a freezing method drilling and pressing test integrated device capable of automatically releasing pressure. The freezing method drilling and pressing test integrated device comprises an orifice pipe, an automatic pressure release valve, a gate valve, a drill rod and a pressing device, the other end of the orifice pipe is connected with the gate valve; the automatic pressure release valve is communicated with the orifice pipe; one end, far away from the orifice pipe, of the gate valve is inserted into the drill rod; the pressing device is connected with the gate valve and used for sealing the gate valve and the drill rod. According to the utility model, the valve is arranged on the gate valve, so that the pressurizing pump and the pressurizing pipe can be connected through the valve for pressurizing; and automatic pressure relief is achieved by arranging an automatic pressure relief valve, and harm caused by too large pressure intensity is prevented. And the drilling rod penetrates through the gate valve and then penetrates into the orifice pipe to achieve drilling, the device only needs one-time installation, drilling and pressing tests are taken into consideration at the same time, the number of installation and construction steps is reduced, and the construction workload is reduced. And the device can quickly complete operation, the construction cost is saved, and smooth and safe construction is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of underground engineering construction, in particular to an integrated device for freezing method drilling and pressure testing with automatic pressure relief. Background Art

[0002] Due to its ability to effectively reinforce the formation, reduce the impact on the surrounding environment, and meet the environmental protection requirements while ensuring construction safety, the freezing method has been widely used in underground engineering construction. The existing construction process of the freezing method is as follows: First, the freezing holes are constructed, then the leak test and installation of the freezing pipes are carried out, and finally the freezing system is installed and debugged. The existing freezing method requires two sets of devices for drilling and pressure testing. Therefore, there are problems such as many installation and construction steps and large construction workload. Content of the Utility Model

[0003] The utility model provides an integrated device for freezing method drilling and pressure testing with automatic pressure relief to solve the technical problems of many installation and construction steps and large construction workload existing in the existing devices for freezing method drilling and pressure testing.

[0004] To achieve the above object, the technical solution of the utility model is as follows:

[0005] An integrated device for freezing method drilling and pressure testing with automatic pressure relief includes: an orifice pipe, an automatic pressure relief valve, a gate valve, a drill pipe and a pressing device; one end of the orifice pipe is inserted into the tunnel segment, and the other end is connected to the gate valve; the automatic pressure relief valve is communicated with the orifice pipe; a valve is provided on the gate valve, and the end of the gate valve away from the orifice pipe is inserted into the drill pipe; the pressing device is connected to the gate valve for sealing between the gate valve and the drill pipe.

[0006] Further, the automatic pressure relief valve includes: a cylinder body, a valve core, a flow discharge port and a damping member; one end of the cylinder body is fixed on the outer wall of the orifice pipe and communicated with the orifice pipe; a ring-shaped retaining ring is fixedly provided on the inner wall of the cylinder body; the valve core is arranged in the cylinder body and can abut against the side of the retaining ring away from the orifice pipe to block the opening of the retaining ring; the damping member is located between the valve core and the end face of the cylinder body, and the acting force of the damping member makes the valve core abut against the retaining ring; the flow discharge port penetrates through the cylinder wall of the cylinder body, and the flow discharge port is located on the side of the retaining ring away from the orifice pipe.

[0007] Further, the automatic pressure relief valve further includes an adjusting knob and a pressing plate. The adjusting knob passes through the end face of the cylinder body and enters the cylinder body and is fixedly connected to the pressing plate. The pressing plate abuts against the end of the damping member away from the valve core; the adjusting knob is threadedly connected to the end face of the cylinder body.

[0008] Further, the center of the valve core, the axis of the damping member, and the axis of the adjusting knob are all arranged along the center line of the cylinder body.

[0009] Further, the valve core is a sphere.

[0010] Furthermore, there are multiple drain ports, and the multiple drain ports are evenly distributed on the circumference of the side wall of the cylinder.

[0011] Furthermore, the orifice pipe is a tapered pipe, the small diameter end of the orifice pipe is inserted into the tunnel segment, and the inner diameter of the orifice of the small diameter end of the orifice pipe matches the drill bit size of the drill pipe.

[0012] Further, the orifice tube is fixed by multiple sets of fixing components.

[0013] Furthermore, the fixing assembly includes: a pointed cone and a connecting rod, the pointed cone is fixedly provided with an undercut, one end of the connecting rod is detachably connected to the pointed cone, and the other end is detachably connected to the outer wall of the orifice tube.

[0014] Beneficial effects:

[0015] The present application discloses an integrated device for automatic pressure relief freezing method drilling and pressure testing. By setting a valve on the gate valve, a pressure pump and a pressure pipe can be connected to the valve for pressure testing. An automatic pressure relief valve is also set to achieve automatic pressure relief to prevent damage caused by excessive pressure. The drilling is achieved by passing the drill rod through the gate valve and then into the orifice pipe. The device only needs to be installed once to take into account both drilling and pressure testing, which reduces the number of installation and construction steps and reduces the construction workload. In addition, the device can complete the operation quickly, save construction costs, and ensure smooth and safe construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a structural schematic diagram of an automatic pressure relief freezing method drilling and pressure testing integrated device disclosed in the utility model;

[0018] Figure 2 It is a structural schematic diagram of an automatic pressure relief valve of a freezing method drilling pressure test integrated device with automatic pressure relief disclosed by the utility model;

[0019] Figure 3 It is a schematic diagram of the cooperation between the drill rod and the orifice pipe of the automatic pressure relief freezing method drilling pressure test integrated device disclosed by the utility model;

[0020] Figure 4 The utility model discloses a structural schematic diagram of a fixing assembly of an integrated device for a freezing method drilling and pressure testing with automatic pressure relief.

[0021] 1. Orifice pipe; 2. Automatic pressure relief valve; 21. Cylinder body; 22. Spool; 23. Flow discharge port; 24. Damper; 25. Retaining ring; 26. Adjusting knob; 27. Pressure plate; 3. Gate valve; 4. Drill pipe; 5. Compression device; 6. Valve; 71. Taper; 711. Reverse thread; 72. Connecting rod; 8. Tunnel segment. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0023] An integrated device for freezing method drilling and pressure testing with automatic pressure relief, in combination with Figure 1 , Figure 2 , Figure 3 and Figure 4 as shown, includes: an orifice pipe 1, an automatic pressure relief valve 2, a gate valve 3, a drill pipe 4 and a compression device 5; one end of the orifice pipe 1 is inserted into the tunnel segment 8, and the other end is connected to the gate valve 3; the automatic pressure relief valve 2 is communicated with the orifice pipe 1; a valve 6 is provided on the gate valve 3, and one end of the gate valve 3 away from the orifice pipe 1 is inserted into the drill pipe 4; the compression device 5 is connected to the gate valve 3 for sealing between the gate valve 3 and the drill pipe 4. When drilling, the drill pipe 4 first passes through the compression device 5, then passes through the gate valve 3 from the side of the gate valve 3 away from the tunnel segment 8 and enters the orifice pipe 1, and the drill pipe 4 continues to extend forward out of the orifice pipe 1 for drilling. The compression device 5 prevents water outside the tunnel from flowing into the tunnel along the gate valve 3 and the drill pipe 4. When performing a pressure test, the valve 6 is opened, the pressure pipe connected to the pressure pump is connected to the gate valve 3, and the pressure pump is started to conduct a pressure test by passing liquid into the gate valve 3. When the pressure is too high, the automatic pressure relief valve 2 is opened to achieve automatic pressure relief protection. This device only needs to be installed once and can take into account both drilling and pressure testing at the same time, reducing the installation and construction steps, reducing the construction workload. And this device can complete the operation quickly, save construction costs, and ensure the smooth and safe progress of the construction.

[0024] Specifically, the valve 6 is connected to the gate valve 3 through a flange and bolt assembly, and the pressure pipe can be connected for pressure testing after removing the valve 6

[0025] Specifically, the compression device 5 is fixedly connected to the gate valve 3 by thread connection. A sealing gasket is provided between the compression device 5 and the gate valve 3, and a sealing ring is provided in the inner hole of the compression device 5. The head of the drill pipe 4 passes through the inner hole of the compression device 5 and then enters the gate valve 3.

[0026] Preferably, the automatic pressure relief valve 2 comprises: a cylinder 21, a valve core 22, a drain port 23 and a damping member 24; one end of the cylinder 21 is fixed on the outer wall of the orifice tube 1 and is connected to the orifice tube 1; an annular retaining ring 25 is fixed on the inner wall of the cylinder 21; the valve core 22 is arranged in the cylinder 21, and can abut against the side of the retaining ring 25 away from the orifice tube 1 to block the opening of the retaining ring 25; in this embodiment, the damping member 24 adopts a composite rubber spring to achieve rust prevention; the damping member 24 is located between the valve core 22 and the end face of the cylinder 21, and the force of the damping member 24 makes the valve core 22 abut against the retaining ring 25; the drain port 23 passes through the cylinder wall of the cylinder 21, and the drain port 23 is located on the side of the retaining ring 25 away from the orifice tube 1. When the orifice tube 1 is passed with liquid, the liquid enters the cylinder 21, and the liquid cannot flow through the retaining ring 25 due to the blocking of the valve core 22. When the liquid pressure in the orifice tube 1 gradually increases, the pressure on the valve core 22 overcomes the elastic force applied by the damping member 24 to the valve core 22, and the valve core 22 is pushed to open the opening of the retaining ring 25. The liquid flows through the opening of the retaining ring 25 and flows out through the discharge port 23 to achieve pressure relief. The movement of the valve core 22 compresses the damping member 24, and the damping member 24 is deformed to increase the elastic force applied to the valve core 22. When the liquid pressure in the orifice tube 1 gradually decreases, the damping member 24 pushes the valve core 22 to return to its original position and stops the pressure relief.

[0027] Preferably, the automatic pressure relief valve 2 further comprises an adjusting knob 26 and a pressure plate 27. The adjusting knob 26 passes through the end surface of the cylinder 21 and enters the cylinder 21 to be fixedly connected to the pressure plate 27. The pressure plate 27 abuts against the end of the damping member 24 away from the valve core 22. The adjusting knob 26 is threadedly connected to the end surface of the cylinder 21. The position of the pressure plate 27 is adjusted by screwing the adjusting knob 26, and the pre-compression force of the damping member 24 is adjusted, thereby adjusting the pressure relief threshold.

[0028] Preferably, the center of the valve core 22, the axis of the damping member 24, and the axis of the adjusting knob 26 are all arranged along the center line of the cylinder 21, so that the forces of the damping member 24 and the adjusting knob 26 act on the center of the valve core 22 along a straight line, so that the valve core 22 is evenly stressed, ensuring that the valve core 22 can reliably block the opening of the retaining ring 25.

[0029] Preferably, the valve core 22 is a sphere, which is beneficial to improving the sealing effect and reducing the resistance of liquid flow.

[0030] Specifically, the retaining ring 25 is integrally formed with the cylinder body 21. The cross-section of the retaining ring 25 is triangular. The spherical surface of the valve core 22 abuts against the surface of the retaining ring 25 away from the orifice pipe 1 to seal the opening of the retaining ring 25. The end face of the cylinder body 21 and the barrel of the cylinder body 21 can be fixed by welding or threading. The valve core 22, the damping member 24 and the pressing plate 27 are sequentially installed into the barrel, and then the pressing plate 27 is connected to the end of the adjusting knob 26 passing through the end face of the cylinder body 21. Finally, the end face of the cylinder body 21 and the barrel of the cylinder body 21 are fixed and sealed to complete the assembly of the automatic pressure relief valve 2.

[0031] Preferably, there are multiple fluid discharge ports 23, and the multiple fluid discharge ports 23 are circumferentially evenly distributed on the side wall of the cylinder body 21 to achieve rapid pressure relief to ensure safety.

[0032] Preferably, the orifice pipe 1 is a conical pipe. The small-diameter end of the orifice pipe 1 is inserted into the tunnel segment 8, and the inner diameter of the small-diameter end pipe orifice of the orifice pipe 1 matches the size of the drill bit of the drill pipe 4. The drill pipe 4 is guided by the conical inner wall of the orifice pipe 1, and the small-diameter end pipe orifice of the orifice pipe 1 is in close fit with the drill pipe 4 to reduce the jamming of the drill pipe 4 due to the gap during the drilling process.

[0033] Preferably, the orifice pipe 1 is fixed by multiple sets of fixing components to prevent the orifice pipe 1 from being pulled out of the tunnel segment 8 during the pressure test.

[0034] Preferably, the fixing component includes: a taper 71 and a connecting rod 72. The taper 71 is conical, which is convenient for driving the taper 71 into the tunnel segment 8. An inverted buckle 711 is fixed on the taper 71. When the taper 71 is pulled outwards by a tensile force, the inverted buckle 711 is forced to open to prevent the taper 71 from being pulled out. One end of the connecting rod 72 is detachably connected to the taper 71, and the other end is detachably connected to the outer wall of the orifice pipe 1. Through holes are opened at the end of the connecting rod 72 and the tail of the taper 71, and the connecting rod 72 and the taper 71 are connected by a bolt assembly. An ear plate is welded on the outer wall of the orifice pipe 1. Through holes are opened on the end of the connecting rod 72 away from the taper 71 and the ear plate, and the connecting rod 72 and the ear plate are connected by a bolt assembly.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic pressure relief freezing method drilling pressure test integrated device, characterized in that: include: Orifice pipe (1), automatic pressure relief valve (2), gate valve (3), drill pipe (4) and clamping device (5); One end of the orifice pipe (1) is inserted into the tunnel segment (8), and the other end is connected to the gate valve (3); The automatic pressure relief valve (2) is connected to the orifice pipe (1); The gate valve (3) is provided with a valve (6), and the end of the gate valve (3) away from the orifice pipe (1) is inserted into the drill pipe (4); The clamping device (5) is connected to the gate valve (3) and is used for sealing between the gate valve (3) and the drill pipe (4).

2. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 1 is characterized in that: The automatic pressure relief valve (2) comprises: a cylinder (21), a valve core (22), a discharge port (23) and a damping member (24); one end of the cylinder (21) is fixed on the outer wall of the orifice tube (1) and is connected to the orifice tube (1); an annular retaining ring (25) is fixedly arranged on the inner wall of the cylinder (21); the valve core (22) is arranged in the cylinder (21) and can abut against a side of the retaining ring (25) away from the orifice tube (1) to block the opening of the retaining ring (25); the damping member (24) is located between the valve core (22) and the end surface of the cylinder (21), and the force of the damping member (24) causes the valve core (22) to abut against the retaining ring (25); the discharge port (23) passes through the cylinder wall of the cylinder (21), and the discharge port (23) is located on a side of the retaining ring (25) away from the orifice tube (1).

3. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 2 is characterized in that: The automatic pressure relief valve (2) further comprises an adjusting knob (26) and a pressure plate (27); the adjusting knob (26) passes through the end surface of the cylinder (21) and enters the cylinder (21) to be fixedly connected to the pressure plate (27); the pressure plate (27) abuts against an end of the damping member (24) away from the valve core (22); the adjusting knob (26) is connected to the end surface of the cylinder (21) by means of threads.

4. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 3 is characterized in that: The center of the valve core (22), the axis of the damping member (24), and the axis of the adjusting knob (26) are all arranged along the center line of the cylinder (21).

5. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 4 is characterized in that: The valve core (22) is a sphere.

6. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 2, characterized in that: There are a plurality of drain ports (23), and the plurality of drain ports (23) are evenly distributed around the circumference of the side wall of the cylinder (21).

7. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 1 is characterized in that: The orifice pipe (1) is a tapered pipe, the small diameter end of the orifice pipe (1) is inserted into the tunnel segment (8), and the inner diameter of the small diameter end of the orifice pipe (1) matches the drill bit size of the drill rod (4).

8. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 1 is characterized in that: The orifice tube (1) is fixed by multiple sets of fixing components.

9. The automatic pressure relief freezing method drilling pressure test integrated device according to claim 8, characterized in that: The fixing assembly comprises: a pointed cone (71) and a connecting rod (72); an undercut (711) is fixedly provided on the pointed cone (71); one end of the connecting rod (72) is detachably connected to the pointed cone (71) and the other end is detachably connected to the outer wall of the orifice tube (1).

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