Water stop sleeve

Abstract

The utility model relates to the technical field of coal mine underground drilling water drainage, and discloses a water stop sleeve which comprises a sleeve body, an insertion joint integrally arranged with one end of the sleeve body, internal threads arranged on the sleeve body and external threads arranged on the insertion joint. The internal thread is matched with the external thread; the starting or ending position of the internal thread is close to the end face of the sleeve body; the insertion joint and the internal thread are located at the two ends of the same sleeve body respectively. One part of the outer side of the insertion joint is provided with external threads, and the other part is polished; the external threads are closer to the joint of the insertion section and the sleeve body relative to the smooth surface; and the insertion joint on one sleeve is in threaded connection with the sleeve main body of the other sleeve. The external threads are arranged on the portion, close to the sleeve body, of the insertion section of each sleeve, the smooth face is arranged on the portion, away from the sleeve body, of the insertion section of each sleeve, connector design is omitted, work procedures are reduced, and installation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of underground drilling and water discharge in coal mines, in particular to a water-stopping casing. Background Art

[0002] In order to guide the drilling process of the drill rod during the underground water exploration and drainage drilling construction, and to prevent the coal rock wall from seeping and the water-bearing stratum from breaking the borehole and protecting the borehole, a water-stopping sleeve is needed. In actual use, the existing water-stopping sleeve adopts multi-section connection, and a 15-20 cm joint is used in the middle of each section for connection. The two ends of the sleeve are directly provided with internal and external threads, such as the Chinese utility model patent with document number CN219198397U; this connection method is easy to cause deformation of the threads of the two ends of the water-stopping sleeve and the joints during underground transportation and installation, and it is not easy to connect. It requires manual on-site correction, which is time-consuming and labor-intensive. Especially in the process of high-altitude installation, improper force by personnel may cause the risk of the sleeve slipping and injuring people; and the installation requires more intermediate joints, which is equivalent to increasing the work process, and the thread connection parts are also increased accordingly, further increasing the risk of unfavorable installation such as disengagement and stripping. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a water-stop casing, by arranging an external thread on a part close to a casing body on an insertion section of each casing section and arranging a smooth surface on a part away from the casing body, thereby eliminating the joint design, reducing the work process, and making installation easy and quick.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a water-stop sleeve, comprising a sleeve body, an insertion joint integrally arranged at one end of the sleeve body, and an internal thread arranged on the sleeve body and an external thread arranged on the insertion joint; the internal thread is adapted to the external thread; the starting or ending position of the internal thread is close to the end face of the sleeve body; the insertion joint and the internal thread are respectively located at the two ends of the same sleeve body; a part of the outer side of the insertion joint is provided with an external thread, and the other part is polished to a smooth surface; the external thread is closer to the connection between the insertion joint and the sleeve body than the smooth surface; the insertion joint on one sleeve is threadedly connected to the sleeve body of the other sleeve.

[0005] Furthermore, the crest of the external thread exceeds the smooth surface; the distance from the crest of the external thread to the center of the circle where it is located is smaller than the inner diameter of the sleeve body.

[0006] Furthermore, an annular retaining piece is fixedly arranged at one end of the sleeve body 1 close to the internal thread; and a retaining block capable of cooperating with the annular retaining piece is arranged circumferentially on the smooth surface.

[0007] Furthermore, the annular retaining member includes a limiting portion which is tightly arranged against the inner wall of the sleeve body and is used to accommodate the retaining block, and a blocking portion which extends along the circumference of the sleeve body and is integrally arranged with the limiting portion; the blocking portion is used to prevent the retaining block from rotating at will.

[0008] Furthermore, the outer surface of the stopper portion and the inner surface of the limiting portion are spaced apart in the normal direction of the sleeve body; and a cavity is provided between the outer surface of the stopper portion and the inner wall of the sleeve body.

[0009] Furthermore, the shape of the limiting portion is adapted to the shape of the blocking block and are both trapezoidal; the connection between the limiting portion and the shifting portion is set as a first chamfer; the end face of the annular blocking member close to the internal thread is set as a second inclined surface, and the transition between the second inclined surface and the inner surface of the annular blocking member is set as a chamfer; the transition between the top and the side of the blocking block is set as a second chamfer.

[0010] Furthermore, the annular retaining member is made of stainless steel, titanium, titanium alloy, copper, copper alloy, aluminum, aluminum alloy, nickel or nickel alloy.

[0011] Furthermore, an annular waterproof elastic ring is arranged inside one end of the sleeve body near the internal thread, and the waterproof elastic ring is arranged tightly against the end face of the annular clamping piece near the internal thread; the end face of the waterproof elastic ring away from the annular clamping piece is arranged to be a first inclined surface, and the connection between the first inclined surface and the inner surface of the waterproof elastic ring is chamfered.

[0012] The beneficial effects of the utility model are as follows: the utility model abandons the intermediate joint, and directly arranges the internal thread and the external thread at the two ends of each casing section respectively, and the external thread is arranged on the insertion section with a relatively small diameter, the external thread is arranged on a part of the insertion section close to the casing body, and the smooth surface is arranged on a part away from the casing body, thereby canceling the intermediate joint design, reducing the process, reducing the cost, and convenient and fast installation, the insertion section can be quickly inserted into the casing body, and the construction risk is also reduced; at the same time, the integrity and tightness of the casing connection are guaranteed; by arranging the annular clamping piece and the clamping block, it is convenient to insert the insertion section into the inside of another casing body and fix it after the threads are tightened, reducing the risk of stripping and thread stripping, and improving the tightness of the connection; an arc surface is arranged on the side of the annular clamping piece close to the internal thread, so that the insertion section is convenient to be screwed into the inside of the annular clamping piece; a waterproof elastic ring is arranged, which can not only realize further waterproof sealing at the connection, but also an inclined surface is arranged on the side of the waterproof elastic ring close to the internal thread, and the thickness of the waterproof elastic ring is less than the thickness of the annular clamping piece, which makes it more convenient for the insertion section to be screwed into the inside of the annular clamping piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0015] Figure 3 For the utility model Figure 1 The enlarged structural diagram at B in the middle;

[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the annular clamping member of the utility model;

[0017] Figure 5 It is a front view structural schematic diagram of the annular clamping member of the utility model.

[0018] In the figure: 1. sleeve body; 2. smooth surface; 3. external thread; 4. internal thread; 5. waterproof elastic ring; 6. first inclined surface; 7. annular clamping member; 701. limiting part; 702. blocking part; 703. cavity; 704. first chamfer; 705. second inclined surface; 8. clamping block; 801. second chamfer. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0020] Example:

[0021] like Figure 1-Figure 5 As shown, a water-stop sleeve comprises a sleeve body 1, an insertion joint integrally arranged at one end of the sleeve body 1, and an internal thread 4 arranged inside the sleeve body 1 and an external thread 3 arranged outside the insertion joint; the internal thread 4 is adapted to the external thread 3; the starting or ending position of the internal thread 4 is close to the end face of the sleeve body 1; the insertion joint and the internal thread 4 are respectively located at two ends of the same sleeve body 1; a part of the outer side of the insertion joint is provided with the external thread 3, and the other part is polished to provide a smooth surface 2; the external thread 3 is closer to the connection between the insertion joint and the sleeve body 1 than the smooth surface 2; the insertion joint on one sleeve is threadedly connected to the sleeve body 1 of the other sleeve through the internal thread 4 and the external thread 3.

[0022] During operation, the smooth surface 2 of the insertion section is first inserted into the sleeve body 1, and after a certain distance, the external thread 3 is screwed into the internal thread 4.

[0023] The crest of the external thread 3 exceeds the surface of the smooth surface 2 ; the distance from the crest of the external thread 3 to the center of the circle where it is located is smaller than the inner diameter of the sleeve body 1 .

[0024] An annular retaining piece 7 is fixedly arranged at one end of the sleeve body 1 near the internal thread 4; the annular retaining piece 7 can be welded and fixed to the inner wall of the sleeve body 1, or it can be fixed to the sleeve body 1 with screws; a clamping block 8 is circumferentially arranged on the smooth surface 2 which can cooperate with the annular retaining piece 7 when the smooth surface 2 is inserted into the sleeve body 1.

[0025] The annular retaining member 7 includes a limiting portion 701 which is tightly arranged on the inner wall of the sleeve body 1 and is used to accommodate the blocking block 8, and a blocking portion 702 which extends circumferentially along the sleeve body 1 and is integrally arranged with the limiting portion 701; the blocking portion 702 is used to prevent the blocking block 8 from rotating at will; there is at least one limiting portion 701 and one blocking portion 702, and multiple limiting portions 701 and blocking portions 702 extend circumferentially along the inner wall of the sleeve body 1.

[0026] The outer surface of the stopper 702 and the inner surface of the limiting part 701 are spaced apart in the normal direction of the sleeve body 1; a cavity 703 is provided between the outer surface of the stopper 702 and the inner wall of the sleeve body 1, so that the stopper 702 can be pressed against the inner wall of the sleeve body 1 when the clamping block 8 is rotated.

[0027] The shape of the limiting portion 701 is adapted to the shape of the clamping block 8, both of which are trapezoidal; the connection between the limiting portion 701 and the shifting portion 702 is set as a first chamfer 704; the end face of the annular clamping member 7 close to the internal thread 4 is set as a second inclined surface 705, and the transition between the second inclined surface 705 and the inner surface of the annular clamping member 7 is set as a chamfer; the transition between the top and the side of the clamping block 8 is set as a second chamfer 801; the setting of the second inclined surface 705 and the first chamfer 704 makes it easy to insert the node into the annular clamping member 7, and the second chamfer 801 can reduce friction when the clamping block 8 is rotated and adjusted in the annular clamping member 7, which is also more labor-saving.

[0028] The annular retaining member 7 is made of stainless steel, titanium, titanium alloy, copper, copper alloy, aluminum, aluminum alloy, nickel or nickel alloy. These alloys are elastic and resistant to water corrosion. When the insertion node is screwed into the annular retaining member 7 and rotated, the blocking portion 702 can be pushed outward; there is a gap between the smooth surface 2 and the inner wall of the sleeve body 1, so it does not affect the insertion of the insertion node into the annular retaining member 7. It is only necessary to adjust the thickness of each part of the annular retaining member 7.

[0029] An annular waterproof elastic ring 5 is arranged inside one end of the sleeve body 1 near the internal thread 4, and the waterproof elastic ring 5 is arranged close to the end face of the annular retaining member 7 near the internal thread 4; the end face of the waterproof elastic ring 5 away from the annular retaining member 7 is arranged to form a first inclined surface 6, and the connection between the first inclined surface 6 and the inner surface of the waterproof elastic ring 5 is chamfered; the thickness of the waterproof elastic ring 5 is less than the maximum thickness of the annular retaining member 7, that is, less than the distance between the inner surface of the blocking portion 702 and the inner wall of the sleeve body 1; the outer diameter of the smooth surface 2 is greater than the distance between the inner surface of the waterproof elastic ring 5 and the corresponding center of the circle.

[0030] This solution abandons the intermediate joint, and directly sets internal threads 4 and external threads 3 at both ends of each section of the casing, and the external threads are set on the insertion section with a relatively small diameter. The external threads are set on the part of the insertion section close to the casing body, and the smooth surface is set on the part away from the casing body. The intermediate joint design is cancelled, the process is reduced, the cost is reduced, and the installation is convenient and fast. The insertion section can be quickly inserted into the casing body, which also reduces the construction risk; at the same time, the integrity and tightness of the casing connection are guaranteed; by setting the annular clamping piece 7 and the clamping block 8, it is convenient to insert the insertion section into the inside of another casing body and fix it after tightening the threads, reducing the risk of stripping and threading, and improving the tightness of the connection; an arc surface is set on the side of the annular clamping piece close to the internal thread, so that the insertion section is convenient to be screwed into the inside of the annular clamping piece; a waterproof elastic ring is set, which can not only realize further waterproof sealing at the connection, but also an inclined surface is set on the side of the waterproof elastic ring 5 close to the internal thread. The thickness of the waterproof elastic ring is less than the thickness of the annular clamping piece, which makes it easier for the insertion section to be screwed into the inside of the annular clamping piece.

[0031] The existing installation of a set of casings requires three people and one hour to complete. After adopting the currently designed water-stop casing, the threaded joint breaks through the traditional threaded connection method. In terms of installation, it not only reduces the intermediate joint connection link, but also designs a quick-plug connection method to facilitate the quick connection of the water-stop casing. It takes three people 20 minutes to install a set of casings.

[0032] During operation, after the insertion section on one water-stop sleeve is inserted into the sleeve body 1 on the other water-stop sleeve, the insertion is very convenient because the outer diameter of the smooth surface 2 is smaller than the inner diameter of the sleeve body 1. It is rotated deep until it is against the side of the waterproof elastic ring 5, and then the rotation is continued to advance, compressing the waterproof elastic ring 5 and then against the second inclined surface 705 of the annular retaining member 7. The second inclined surface 705 is compressed and then screwed into the inner surface of the annular retaining member 7. At this time, the annular retaining member 7 is compressed from the inner surface of the blocking portion 702, and the rotation is continued until the external thread 3 is completely screwed in or the block 8 is completely dropped into the limiting portion 701. Adjusting the screw-in depth can adjust the axial overlap length of the block 8 and the limiting portion 701.

[0033] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A water stop casing, characterized in that: The invention comprises a sleeve body (1), an insertion section integrally arranged with one end of the sleeve body (1), an internal thread (4) arranged on the sleeve body (1), and an external thread (3) arranged on the insertion section; the internal thread (4) is adapted to the external thread (3); the starting or ending position of the internal thread (4) is close to the end face of the sleeve body (1); the insertion section and the internal thread (4) are respectively located at two ends of the same sleeve body (1); a portion of the outer side of the insertion section is provided with the external thread (3), and the other portion is polished to provide a smooth surface (2); the external thread (3) is closer to the connection between the insertion section and the sleeve body (1) than the smooth surface (2); the insertion section on one sleeve is threadedly connected to the sleeve body (1) of the other sleeve.

2. A water stop sleeve according to claim 1, characterized in that: The crest of the external thread (3) protrudes from the surface of the smooth surface (2); and the distance from the crest of the external thread (3) to the center of the circle on which it lies is smaller than the inner diameter of the sleeve body (1).

3. A water-stop sleeve according to claim 1, characterized in that: An annular retaining piece (7) is fixedly arranged at one end of the sleeve body (1) close to the internal thread (4); and a retaining block (8) capable of cooperating with the annular retaining piece (7) is circumferentially arranged on the smooth surface (2).

4. A water-stop sleeve according to claim 3, characterized in that: The annular retaining member (7) comprises a limiting portion (701) arranged in close contact with the inner wall of the sleeve body (1) and used to accommodate the retaining block (8), and a blocking portion (702) extending along the circumference of the sleeve body (1) and integrally arranged with the limiting portion (701); the blocking portion (702) is used to prevent the retaining block (8) from rotating at will.

5. A water-stop sleeve according to claim 4, characterized in that: The outer surface of the stopper (702) and the inner surface of the limiting portion (701) are spaced apart in the normal direction of the sleeve body (1); a cavity (703) is provided between the outer surface of the stopper (702) and the inner wall of the sleeve body (1).

6. A water-stop casing according to claim 4, characterized in that: The shape of the limiting portion (701) matches that of the clamping block (8), and both are trapezoidal; the connection between the limiting portion (701) and the blocking portion (702) is configured as a first chamfer (704); the end surface of the annular clamping member (7) close to the internal thread (4) is configured as a second inclined surface (705), and the transition between the second inclined surface (705) and the inner surface of the annular clamping member (7) is configured as a chamfer; the transition between the top and the side of the clamping block (8) is configured as a second chamfer (801).

7. A water-stop casing according to claim 4, characterized in that: The annular retaining member (7) is made of stainless steel, titanium, titanium alloy, copper, copper alloy, aluminum, aluminum alloy, nickel or nickel alloy.

8. The waterproof casing according to claim 4, characterized in that: An annular waterproof elastic ring (5) is arranged inside one end of the sleeve body (1) close to the internal thread (4); the waterproof elastic ring (5) is arranged in close contact with the end surface of the annular retaining member (7) close to the internal thread (4); the end surface of the waterproof elastic ring (5) away from the annular retaining member (7) is arranged to form a first inclined surface (6); the connection between the first inclined surface (6) and the inner surface of the waterproof elastic ring (5) is rounded.

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