Raise boring machine water sealing sleeve and raise boring machine

Abstract

The utility model provides a raise boring machine water sealing sleeve and a raise boring machine, relates to the field of raise boring machine sealing, and adopts the technical scheme that the raise boring machine water sealing sleeve comprises a sealing flange used for being connected with a water inlet pipe, and further comprises a first connecting pipe and a second connecting pipe, a plurality of meshing grooves are formed in the end face of the water inlet end of the second connecting pipe, the meshing blocks can stretch into the meshing grooves, and the meshing blocks are in clearance fit with the meshing grooves. The rotary sealing sleeve is arranged at the meshing position of the first connecting pipe and the second connecting pipe in a sleeving mode, a first sealing ring is arranged between the rotary sealing sleeve and the first connecting pipe, a second sealing ring is arranged between the rotary sealing sleeve and the second connecting pipe, and the rotary sealing sleeve rotates together with the first connecting pipe and the second connecting pipe. High machining and installation precision is not needed, the sealing performance of the water sealing sleeve is guaranteed, and leakage is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of well drilling rig sealing, and in particular to a well drilling rig water sealing sleeve and well drilling rig. Background Technology

[0002] A well drilling rig is an engineering device used to drill wells underground. It is widely used in mining, water conservancy and hydropower, transportation and national defense engineering fields. The slag removal system is an important part of the well drilling rig, which meets the requirements of rock slag flushing and tool washing and cooling. For hollow spindles, slag removal water is introduced from the inlet end of the hollow spindle.

[0003] In the prior art, Chinese utility model patent with authorization announcement number CN205578733U discloses a water sealing structure for a riser drilling rig, including an upper flange, a lower flange, a rotary joint mounting base, and a wear-resistant core tube. The lower end of the rotary joint mounting base is connected to a hollow main shaft. The rotary joint mounting base has a hollow structure. The upper flange is located above the rotary joint mounting base. A bearing assembly is provided between the outer wall of the rotary joint mounting base and the inner wall of the outer shell. The upper part of the wear-resistant core tube is located at the stepped hole at the lower end of the upper flange, and the lower part is located at the stepped hole at the upper end of the rotary joint mounting base. A sealing groove is provided at the stepped hole at the lower end of the upper flange, and a rotary seal is provided in the sealing groove. A dustproof ring is provided between the end face of the upper part of the wear-resistant core tube and the bottom of the stepped hole of the upper flange. Lip seals are provided above the upper bearing and below the lower bearing of the bearing assembly. The water sealing structure achieves sealing of the hollow main shaft inlet end through which slag and water are discharged, resulting in good sealing performance.

[0004] However, the above water-sealing structure, with its rotating joint mounting base running throughout, requires high manufacturing and installation precision for each component. Otherwise, it will accelerate the wear of the sealing ring and cause leakage, which greatly increases the manufacturing cost of the water seal. Utility Model Content

[0005] To address the technical problem in the prior art that the sealing performance of the water sealing sleeve of a well drilling rig can only be guaranteed with high manufacturing and installation precision, this utility model provides a water sealing sleeve and well drilling rig that do not require high processing and installation precision, thus ensuring the sealing performance of the water sealing sleeve and effectively preventing leakage.

[0006] In a first aspect, this utility model provides a water sealing sleeve for a well drilling rig to solve the above-mentioned technical problems. The sleeve includes a sealing flange for connecting to a water inlet pipe, and further includes: a first connecting pipe and a second connecting pipe. The inlet end of the first connecting pipe is connected to the water inlet pipe, and the outlet end of the second connecting pipe extends into a gearbox and is connected to a hollow main shaft. The first and second connecting pipes rotate together with the hollow main shaft. The inlet end of the first connecting pipe is rotatably disposed within the sealing flange. A meshing block is provided on the end face of the outlet end of the first connecting pipe, and multiple meshing grooves are provided on the end face of the inlet end of the second connecting pipe. The meshing block can extend into the meshing grooves, and the meshing block and the meshing grooves are in clearance fit. A rotating sealing sleeve is fitted onto the meshing point of the first and second connecting pipes. A sealing ring is provided between the rotating sealing sleeve and the first connecting pipe, and a sealing ring is provided between the rotating sealing sleeve and the second connecting pipe. The rotating sealing sleeve rotates together with the first and second connecting pipes.

[0007] This invention, by setting up a meshing connection between connecting pipe 1 and connecting pipe 2 with a small rotation angle, enables connecting pipe 1 and connecting pipe 2 to rotate relative to each other and no longer be coaxial, even when there are manufacturing and installation errors in the components, such as a certain deviation in coaxiality. During the rotation with the main shaft, compared with the prior art, it can reduce the eccentric force on sealing ring 1 and sealing ring 2, reduce wear on specific positions of sealing ring 1 and sealing ring 2, extend the service life of sealing ring 1 and sealing ring 2, and ensure the sealing performance of this water-sealing jacket.

[0008] Furthermore, a limiting block is provided on the upper part of the rotary sealing sleeve, and a flange is provided on the inner side of the limiting block. An annular limiting groove is provided at the corresponding position on the outer circumference of the connecting pipe. The flange can extend into the limiting groove and can move axially within the limiting groove.

[0009] This invention, by setting a limiting block and a limiting groove, can prevent the rotary sealing sleeve from moving excessively under the action of equipment vibration, thus preventing sealing failure.

[0010] Furthermore, in this example, both sealing ring one and sealing ring two are provided in duplicate.

[0011] Furthermore, the inner wall of the sealing flange is provided with a sealing groove, and a sealing ring three is provided in the sealing groove. The sealing ring three is sleeved on the water inlet end of the connecting pipe one, and the sealing ring three adopts a rotary seal.

[0012] Furthermore, the sealing flange is provided with a mounting hole, which communicates with the sealing groove. The mounting hole is connected to the oil pump through an oil pipe, and a pressure gauge and an accumulator are provided on the oil pipe.

[0013] This invention uses an oil pump and an accumulator to provide stable pressure-holding oil to the mounting hole. When the sealing ring fails, the pressure-holding oil flows back into the gap between the connecting pipe and the sealing flange, causing the pressure gauge reading to drop. This allows people to detect leaks in the sealing ring in time and replace it promptly.

[0014] Furthermore, an upper connecting plate is connected to the upper part of the sealing flange. The upper connecting plate is detachably connected to the sealing flange. Both the lower inner wall of the upper connecting plate and the upper inner wall of the sealing flange are provided with annular receiving grooves. The two receiving grooves are used to accommodate the flange on the outer circle of the water inlet pipe.

[0015] This utility model uses an upper connecting plate to fix the water inlet pipe, which allows for adjustment of the water inlet pipe's angle, facilitating connection to water sources in different locations.

[0016] Furthermore, an adjusting shim is provided between the sealing flange and the upper connecting plate.

[0017] This invention allows for adjustment of the axial clearance of the water-sealing sleeve by setting an adjusting shim, thereby achieving a better sealing effect.

[0018] Furthermore, a support base is provided at the lower part of the sealing flange, the support base is provided with an operating port, the rotary sealing sleeve is disposed inside the support base, and the lower part of the support base can be connected to the gearbox.

[0019] This utility model, by providing a support base and an operating port, facilitates the disassembly and replacement of the rotating sealing sleeve and the internal sealing ring.

[0020] Secondly, this utility model also provides a well drilling rig, including a gearbox and a hollow main shaft, the hollow main shaft being disposed inside the gearbox, and also including the aforementioned well drilling rig water sealing sleeve. The gearbox includes a housing, and a housing cover is provided on the housing. The second connecting pipe passes through the housing cover and enters the gearbox. The housing cover is provided with a fourth sealing ring and a fifth sealing ring, the fourth sealing ring and the fifth sealing ring surrounding the outside of the second connecting pipe.

[0021] This invention enhances the sealing of the box by setting sealing ring four and sealing ring five.

[0022] Furthermore, it also includes a sealing ring six, which is disposed between the box cover and the box body.

[0023] As can be seen from the above technical solutions, this utility model has the following advantages:

[0024] This utility model provides a water sealing sleeve for a well drilling rig and the well drilling rig itself. By setting up a connecting pipe 1 and a connecting pipe 2 with a small rotation angle for interlocking connection, even with manufacturing and installation errors in components, such as a certain deviation in coaxiality, the connecting pipe 1 and connecting pipe 2 can rotate relative to each other and no longer be coaxial. During the rotation with the main shaft, compared with the prior art, it can reduce the eccentric force on the sealing rings 1 and 2, reduce wear on specific positions of the sealing rings 1 and 2, extend the service life of the sealing rings 1 and 2, and ensure the sealing performance of the water sealing sleeve; by setting a limit block and a limit... The groove prevents the rotary seal sleeve from moving excessively under equipment vibration, causing seal failure. The oil pump and accumulator provide stable pressure-holding oil to the mounting hole. When the seal ring fails, the pressure-holding oil flows back into the gap between the connecting pipe and the sealing flange, causing a drop in the pressure gauge reading. This allows for timely detection and replacement of the seal ring. The upper connecting plate for fixing the inlet pipe allows for adjustment of the inlet pipe's angle, facilitating connection to water sources in different locations. The support base and operating port facilitate the disassembly and replacement of the rotary seal sleeve and the internal seal ring. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural diagram of a specific embodiment of the present invention. Figure 1 .

[0027] Figure 2 This is a structural diagram of a specific embodiment of the present invention. Figure 2 .

[0028] Figure 3 This is a partial structural diagram of a specific embodiment of the present invention.

[0029] In the diagram, 1. Support base; 2. Connecting pipe two; 3. Rotary sealing sleeve; 4. Upper connecting plate; 5. Limiting block; 6. Water inlet pipe; 7. Oil pump; 8. Connecting pipe one; 9. Sealing flange; 10. Adjusting shim; 11. Sealing ring two; 12. Sealing ring three; 13. Sealing ring one; 14. Sealing ring four; 15. Sealing ring five; 16. Box cover; 17. Sealing ring six; 18. Main shaft; 19. Box body; 20. Sealing ring seven; 22. Oil pipe; 23. Pressure gauge; 24. Accumulator. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent. Specific Implementation Method 1

[0032] like Figure 1 and Figure 2 As shown in the figure, this specific embodiment provides a water sealing sleeve for a well drilling rig, including a sealing flange 9, a connecting pipe 1 8, a connecting pipe 2 2, a rotating sealing sleeve 3, a sealing ring 1 13, and a sealing ring 2 11. The sealing flange 9 is used to connect to the water inlet pipe 6. The water inlet end of the connecting pipe 1 8 is connected to the water inlet pipe 6. The water outlet end of the connecting pipe 2 2 extends into the gearbox and is connected to the hollow spindle. The connecting pipe 1 8 and the connecting pipe 2 2 rotate together with the hollow spindle. The water inlet end of the connecting pipe 1 8 is rotatably disposed in the sealing flange 9. A meshing block is provided on the end face of the water outlet end of the connecting pipe 1 8. The connecting pipe 2 11... Multiple meshing grooves are provided on the inlet end face of 2, and the meshing block can extend into the meshing groove, with the meshing block and the meshing groove having a clearance fit; the rotating sealing sleeve 3 is sleeved at the meshing point of the first connecting pipe 8 and the second connecting pipe 2, and a sealing ring 13 is provided between the rotating sealing sleeve 3 and the first connecting pipe 8, and a sealing ring 11 is provided between the rotating sealing sleeve 3 and the second connecting pipe 2, and the rotating sealing sleeve 3 rotates together with the first connecting pipe 8 and the second connecting pipe 2; in this specific embodiment, in order to improve the sealing performance, two sealing rings are provided for both the first sealing ring 13 and the second sealing ring 11.

[0033] This specific embodiment, by setting up a meshing connection between connecting pipe 8 and connecting pipe 2 with a small rotation angle, enables the connecting pipe 8 and connecting pipe 2 to rotate relative to each other and no longer be coaxial when there are manufacturing and installation errors in the components, such as a certain deviation in coaxiality. This allows for self-adaptation to the error. During the rotation with the main shaft, compared with the conventional rotating mounting seat, it can reduce the eccentric force on sealing ring 13 and sealing ring 21, reduce wear on specific positions of sealing ring 13 and sealing ring 21, extend the service life of sealing ring 13 and sealing ring 21, and ensure the sealing performance of this water-sealing jacket.

[0034] The rotary sealing sleeve 3 can move axially under equipment vibration. This movement prevents the sealing rings 13 and 11 from only contacting specific positions on the connecting pipes 8 and 2, thus avoiding long-term seal wear. However, if the axial movement distance of the rotary sealing sleeve 3 is too large, it will affect the sealing effect. Therefore, in this specific embodiment, if... Figure 1 and Figure 3 As shown, a limiting block 5 is bolted to the upper part of the rotary sealing sleeve 3. A flange is provided on the inner side of the limiting block 5. An annular limiting groove is provided at the corresponding position on the outer circumference of the connecting pipe 8. The flange can extend into the limiting groove and can move axially within the limiting groove. Through the action of the flange and the limiting groove on the inner wall of the limiting block 5, the rotary sealing sleeve 3 can only move within the range of the size difference between the limiting groove and the flange, which satisfies the requirement of avoiding long-term wear at specific positions and also avoids the technical problem of excessive axial movement.

[0035] like Figure 1 and Figure 3 As shown, further, the inner wall of the sealing flange 9 is provided with a sealing groove, and a sealing ring 12 is provided in the sealing groove. The sealing ring 12 is sleeved on the water inlet end of the connecting pipe 8, and the sealing ring 12 adopts a rotary seal; the sealing ring 12 realizes the seal between the sealing flange 9 and the connecting pipe 8.

[0036] like Figure 2 As shown, furthermore, since the rotary seal ring 12 is more prone to failure than the static seal, in order to detect seal failure in a timely manner, in this specific embodiment, the sealing flange 9 is provided with an installation hole, which is connected to the sealing groove. The installation hole is connected to the oil pump 7 through the oil pipe 22, and the oil pipe 22 is provided with a pressure gauge 23 and an accumulator 24. When the rotary seal ring 12 fails to function, it can isolate the connection between the installation hole and the gap between the inner wall of the sealing flange 9 and the connecting pipe 2. At this time, the pressure-holding oil input by the oil pump 7 to the installation hole can maintain the set pressure. When the rotary seal ring 12 functions, the installation hole is connected to the gap, and the pressure-holding oil enters into the gap, causing the pressure inside the installation hole to decrease, and the reading of the pressure gauge 23 to decrease. By periodically observing the reading of the pressure gauge 23, the failure of the rotary seal ring 12 can be detected in a timely manner. The accumulator 24 can ensure that the pressure-holding oil entering the installation hole maintains a stable oil pressure without fluctuation.

[0037] like Figure 1 and Figure 2As shown in this specific embodiment, an upper connecting plate 4 is connected to the upper part of the sealing flange 9. The upper connecting plate 4 and the sealing flange 9 are detachably connected by bolts. Both the lower inner wall of the upper connecting plate 4 and the upper inner wall of the sealing flange 9 are provided with annular receiving grooves. The two receiving grooves are used to accommodate the flange on the outer circle of the water inlet pipe 6. This connection method allows the water inlet pipe 6 to rotate circumferentially, so that the angle can be adjusted when necessary to connect to water sources in different directions. Furthermore, an adjusting shim 10 is provided between the sealing flange 9 and the upper connecting plate 4. The adjusting shim 10 is sleeved on the corresponding bolts. The axial clearance of the sealing sleeve can be adjusted by the adjusting shim 10 to achieve a good sealing effect.

[0038] like Figure 1 and Figure 2 As shown, for ease of operation, in this specific embodiment, a support base 1 is provided at the lower part of the sealing flange 9, the support base 1 is provided with an operating port, the rotary sealing sleeve 3 is disposed inside the support base 1, and the lower part of the support base 1 can be connected to the gearbox; during maintenance, the operating port provides sufficient operating space, making it easy for personnel to enter and operate; in this specific embodiment, the support base 1 is a frame structure.

[0039] like Figure 1 As shown, in this specific embodiment, the end of the water inlet pipe 6 extends into the water inlet end of the connecting pipe 8, and a sealing ring 20 is provided between the water inlet pipe 6 and the inner wall of the sealing flange 9; in this specific embodiment, the sealing ring 13, the sealing ring 21 and the sealing ring 20 are all O-rings. Specific Implementation Method Two

[0041] This specific embodiment also provides a well drilling rig, including a gearbox and a hollow spindle. The hollow spindle is disposed inside the gearbox. It also includes the aforementioned well drilling rig water sealing sleeve. The gearbox includes a housing 19, and a housing cover 16 is disposed on the housing 19. The connecting pipe 2 passes through the housing cover 16 and enters the housing 19. The housing cover 16 is provided with a sealing ring 14 and a sealing ring 15. The sealing rings 14 and 15 surround the outside of the connecting pipe 2. By providing the sealing rings 14 and 15, the sealing of the housing 19 can be enhanced. The sealing ring 14 is a dustproof sealing ring, and the sealing ring 15 is a mechanical shaft seal.

[0042] This specific embodiment also includes a sealing ring 6 17, which is disposed between the box cover 16 and the box body 19, and the sealing ring 6 17 is an O-ring.

[0043] Even if a leak occurs, the leaked water will flow out through the gap between connecting pipe 1 (8), connecting pipe 2 (2), and rotating sealing sleeve 3, and will not enter the gearbox and main shaft, thus ensuring the internal safety of the gearbox. Furthermore, as wear parts, connecting pipe 1 (8), connecting pipe 2 (2), rotating sealing sleeve 3, and sealing ring are easy to replace even if wear and leakage occur, saving time and effort.

[0044] As can be seen from the above specific embodiments, this utility model has the following beneficial effects:

[0045] 1. By setting up a meshing connection between connecting pipe 8 and connecting pipe 2 with a small rotation angle, even with manufacturing and installation errors in the components, such as a certain deviation in coaxiality, connecting pipe 8 and connecting pipe 2 can rotate relative to each other and no longer be coaxial. During the rotation with the main shaft, compared with the prior art, it can reduce the eccentric force on sealing ring 13 and sealing ring 21, reduce wear on specific positions of sealing ring 13 and sealing ring 21, extend the service life of sealing ring 13 and sealing ring 21, and ensure the sealing performance of this water-sealing jacket;

[0046] 2. By setting the limit block 5 and the limit groove, the rotating sealing sleeve 3 can be prevented from moving excessively under the action of equipment vibration, which would cause the seal to fail.

[0047] 3. The oil pump 7 and accumulator 24 provide stable pressure holding oil to the mounting hole. When the seal ring 12 fails, the pressure holding oil will flow back into the gap between the connecting pipe 8 and the sealing flange 9, causing the pressure reading of the hydraulic gauge to drop. This allows people to detect the leak in the seal ring 12 in time and replace it in time.

[0048] 4. By fixing the water inlet pipe 6 with the upper connecting plate 4, the angle of the water inlet pipe 6 can be adjusted, which facilitates connection with water sources in different directions;

[0049] 5. By setting up the support base 1 and the operating port, it is convenient to disassemble and replace the rotary sealing sleeve 3 and the internal sealing ring 312.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water sealing sleeve for a well drilling rig, comprising a sealing flange (9), said sealing flange (9) for connection to a water inlet pipe, characterized in that, Also includes: Connecting pipe one (8) and connecting pipe two (2), the water inlet end of the connecting pipe one (8) is connected to the water inlet pipe, the water outlet end of the connecting pipe two (2) extends into the gearbox and is connected to the hollow main shaft, the connecting pipe one (8) and connecting pipe two (2) rotate together with the hollow main shaft, the water inlet end of the connecting pipe one (8) is rotatably set in the sealing flange (9), the water outlet end face of the connecting pipe one (8) is provided with a meshing block, the water inlet end face of the connecting pipe two (2) is provided with multiple meshing grooves, the meshing block can extend into the meshing groove, the meshing block and the meshing groove are in clearance fit; A rotating sealing sleeve (3) is fitted onto the meshing point of the first connecting pipe (8) and the second connecting pipe (2). A sealing ring (13) is provided between the rotating sealing sleeve (3) and the first connecting pipe (8), and a sealing ring (11) is provided between the rotating sealing sleeve (3) and the second connecting pipe (2). The rotating sealing sleeve (3) rotates together with the first connecting pipe (8) and the second connecting pipe (2).

2. The well drilling rig water sealing sleeve as described in claim 1, characterized in that, The upper part of the rotary sealing sleeve (3) is provided with a limiting block (5), the inner side of the limiting block (5) is provided with a flange, and the outer circumference of the connecting pipe (8) is provided with an annular limiting groove at the corresponding position. The flange can extend into the limiting groove and can move axially within the limiting groove.

3. The well drilling rig water sealing sleeve as described in claim 2, characterized in that, Both the first sealing ring (13) and the second sealing ring (11) are provided in twos.

4. The well drilling rig water sealing sleeve as described in any one of claims 1-3, characterized in that, The inner wall of the sealing flange (9) is provided with a sealing groove, and a sealing ring three (12) is provided in the sealing groove. The sealing ring three (12) is sleeved on the water inlet end of the connecting pipe one (8), and the sealing ring three (12) adopts a rotary seal.

5. The well drilling rig water sealing sleeve as described in claim 4, characterized in that, The sealing flange (9) is provided with an installation hole, which is connected to the sealing groove. The installation hole is connected to the oil pump (7) through an oil pipe (22). A pressure gauge (23) and an accumulator (24) are provided on the oil pipe (22).

6. The well drilling rig water sealing sleeve as described in claim 5, characterized in that, The upper part of the sealing flange (9) is connected to the upper connecting plate (4). The upper connecting plate (4) is detachably connected to the sealing flange (9). The lower inner wall of the upper connecting plate (4) and the upper inner wall of the sealing flange (9) are provided with annular receiving grooves. The two receiving grooves are used to accommodate the flange on the outer circle of the water inlet pipe (6).

7. The well drilling rig water sealing sleeve as described in claim 6, characterized in that, An adjusting shim (10) is provided between the sealing flange (9) and the upper connecting plate (4).

8. The well drilling rig water sealing sleeve as described in claim 7, characterized in that, The sealing flange (9) is provided with a support seat (1) at its lower part. The support seat (1) is provided with an operating port. The rotary sealing sleeve (3) is located inside the support seat (1). The lower part of the support seat (1) can be connected to the gearbox.

9. A well drilling rig, comprising a gearbox and a hollow spindle, wherein the hollow spindle is disposed within the gearbox, and further comprising a well drilling rig water sealing sleeve as described in claim 8, characterized in that, The gearbox includes a housing (19), a housing cover (16) is provided on the housing (19), and the connecting pipe (2) passes through the housing cover (16) and enters the housing (19). The housing cover (16) is provided with a sealing ring (14) and a sealing ring (15), which surround the outside of the connecting pipe (2).

10. The well drilling rig as described in claim 9, characterized in that, It also includes a sealing ring six (17), which is disposed between the box cover (16) and the box body (19).

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