Rotary joint assembly of drilling machine and drilling machine

Abstract

The utility model relates to the technical field of drilling machines, and discloses a drilling machine rotating joint assembly and a drilling machine, and the drilling machine rotating joint assembly comprises a sealing end cover, a rotating shaft, a rotating shaft shell, a sealing assembly and a gasket assembly. A first axial through hole is formed in the sealing end cover and is suitable for being connected with a slurry conveying pipeline of a drilling machine; one end of the rotating shaft is rotatably arranged in the first axial through hole, and the other opposite end is suitable for being connected with an output shaft of the drilling machine; the rotating shaft shell movably sleeves the rotating shaft and is connected with the sealing end cover; a sealing cavity is formed among the peripheral surface of the rotating shaft, the inner wall of the sealing end cover and one side end surface of the rotating shaft shell; the sealing assembly is arranged in a gap between the sealing end cover and the rotating shaft and is positioned in the sealing cavity; the gasket assembly is detachably arranged at the joint of the sealing end cover and the rotating shaft shell. By disassembling the gasket assembly and extruding the sealing assembly, the abrasion part of the sealing assembly can be compensated, the service life of the sealing assembly is prolonged, and therefore the working efficiency of the drilling machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling rigs, in particular to a drilling rig rotary joint assembly and a drilling rig. Background Art

[0002] During the drilling and pulling back process, the main shaft of the drilling rig will rotate with the drill pipe, and the mud pump will continue to deliver mud into the hollow drill pipe. A rotary joint is generally provided at the connection between the mud delivery pipeline of the drilling rig and the main shaft. One end of the rotary joint rotates with the main shaft, while the other end is fixed to the mud delivery pipeline.

[0003] In order to prevent mud from leaking from the rotary joint, the rotary structure is usually sealed with a sealing ring. Since the sealing ring needs to be in contact with the main shaft, the sealing ring will be constantly worn and consumed, so the service life of the sealing ring is short and needs to be replaced frequently, resulting in low working efficiency of the drilling rig. Utility Model Content

[0004] In view of this, the utility model provides a drilling rig rotary joint assembly and a drilling rig to solve the problem that the sealing ring of the rotating structure is constantly worn and consumed, has a short service life, and needs to be frequently replaced, resulting in low working efficiency of the drilling rig.

[0005] In a first aspect, the utility model provides a drilling rig rotary joint assembly, comprising:

[0006] The sealing end cover is provided with a first axial through hole and is suitable for connecting with the mud conveying pipeline of the drilling rig;

[0007] A rotating shaft, one end of which is rotatably disposed in the first axial through hole and has a gap with the inner wall of the first axial through hole, and the other end of which is suitable for connecting with the output shaft of the drilling rig;

[0008] A shaft housing, movably sleeved on the shaft and connected to the sealing end cover;

[0009] A sealed cavity is formed between the outer peripheral surface of the rotating shaft, the inner wall of the sealing end cover and one side end surface of the rotating shaft housing;

[0010] A sealing assembly, disposed at a gap between the sealing end cover and the rotating shaft and located in the sealing cavity;

[0011] The gasket assembly is detachably arranged at the connection between the sealing end cover and the rotating shaft housing.

[0012] Beneficial effects: The sealing assembly of the utility model can effectively seal the mud transported by the mud transport pipeline, prevent the mud from leaking at the connection between the sealing end cover and the rotating shaft, and improve the reliability of the drilling rig. After the sealing assembly is worn, by removing the gasket assembly at the connection between the sealing end cover and the rotating shaft housing, the space of the sealing cavity can be reduced to squeeze the sealing assembly, thereby compensating for the worn part of the sealing assembly, increasing the service life of the sealing assembly, reducing the replacement frequency of the sealing assembly, and ultimately improving the working efficiency of the drilling rig.

[0013] In an optional embodiment, a protrusion is formed on an end surface of the shaft housing close to the sealing end cover along the axial extension, and a portion of the protrusion is inserted into the first axial through hole and abuts against the sealing assembly.

[0014] Beneficial effect: A sealing cavity is formed between the end face of the protrusion, the outer peripheral surface of the rotating shaft and one side end face of the rotating shaft housing. After the gasket assembly is disassembled, the protrusion can continue to be inserted into the first axial through hole, thereby shortening the length of the sealing cavity in the axial direction of the rotating shaft to squeeze the sealing assembly and compensate for the worn part of the sealing assembly. The structure is simple and easy to use.

[0015] In an optional embodiment, the sealing end cover is detachably connected to the shaft housing via a fastener, and the gasket assembly includes a plurality of stacked adjustment gaskets, and the plurality of adjustment gaskets are all sleeved on the outer periphery of the raised portion.

[0016] Beneficial effect: After the seal assembly is worn, first loosen the fastener to disassemble the seal end cover and the shaft housing, and then disassemble at least one adjustment gasket according to the wear condition of the seal assembly, thereby reducing the length of the seal cavity in the axial direction of the shaft, squeezing the seal assembly, and compensating the worn part of the seal assembly. If multiple adjustment gaskets are provided, the seal assembly can be disassembled multiple times and the seal assembly can be squeezed step by step, further improving the service life of the seal assembly.

[0017] In an optional implementation, each of the adjustment gaskets includes at least two arc-shaped pieces.

[0018] Beneficial effect: Each adjusting gasket includes at least two arc-shaped pieces, which can be directly pulled out from the side after the fasteners are loosened, without completely disassembling the sealing end cover and the shaft housing, which facilitates the rapid disassembly and installation of the adjusting gasket, further improving the working efficiency of the drilling rig.

[0019] In an optional embodiment, the sealing assembly includes a plurality of stacked sealing members, wherein an oil passage is provided between two adjacent sealing members.

[0020] Beneficial effect: An oil passage is provided between two adjacent seals, and the oil passage can be used to achieve effective lubrication between multiple seals, reduce the wear of multiple seals, and further increase the service life of the seals.

[0021] In an optional embodiment, the sealing end cover is further provided with an oil inlet passage connected with the oil passage, and an oil nozzle is provided at the port of the oil inlet passage.

[0022] Beneficial effect: by utilizing the oil inlet passage on the sealing end cover which is connected with the oil passage, an oil nozzle is provided at the port of the oil inlet passage, so as to supply oil to the oil passage and avoid oil leakage.

[0023] In an optional embodiment, the first axial through hole includes a first through hole and a second through hole that are connected to each other, the aperture of the first through hole is larger than the aperture of the second through hole, a step surface is formed at the connection between the first through hole and the second through hole, the rotating shaft and the sealing assembly are arranged in the first through hole, and the second through hole is suitable for connecting with a mud conveying pipeline of a drilling rig.

[0024] Beneficial effect: The first through hole can be used to install the rotating shaft and the sealing assembly, and the step surface at the connection between the first through hole and the second through hole can effectively support the sealing assembly. Since the second through hole is connected to the mud conveying pipeline of the drilling rig, the mud in the mud conveying pipeline can be conveyed to the second through hole, and then input into the rotating shaft through the second through hole. At the same time, the sealing assembly is arranged in the first through hole, which can prevent the mud from leaking from the first through hole.

[0025] In an optional embodiment, the rotating shaft is provided with a second axial through hole, and the second axial through hole is communicated with the second through hole.

[0026] Beneficial effect: Since the second axial through hole of the rotating shaft is connected to the second through hole, the mud received by the second through hole from the mud conveying pipeline will enter the second axial through hole, then enter the drill rod of the drilling rig through the second axial through hole, and finally be ejected from the drill bit to play the role of lubrication, cooling, wall protection, and chip removal.

[0027] In an optional embodiment, a bearing is further included, and the rotating shaft is rotatably connected to the rotating shaft housing through the bearing.

[0028] Beneficial effects: The bearing can withstand greater radial forces, can prevent the shaft and the shaft housing from being subjected to greater impact forces, and is beneficial to improving the movement stability of the shaft.

[0029] In a second aspect, the utility model further provides a drilling rig, comprising:

[0030] Mud transport pipeline;

[0031] A driving member having an output shaft;

[0032] In the drilling rig rotary joint assembly, the sealing end cover is connected to the mud conveying pipeline, and the rotating shaft is connected to the output shaft.

[0033] Beneficial effect: Because the drilling rig includes the drilling rig rotary joint assembly, it has the same effect as the drilling rig rotary joint assembly, that is, the sealing assembly can effectively seal the mud transported by the mud transport pipeline, prevent the mud from leaking at the connection between the sealing end cover and the rotating shaft, and improve the reliability of the drilling rig. After the sealing assembly is worn, the space of the sealing cavity is reduced by removing the gasket assembly at the connection between the sealing end cover and the rotating shaft housing to squeeze the sealing assembly, thereby compensating for the worn part of the sealing assembly, improving the service life of the sealing assembly, reducing the replacement frequency of the sealing assembly, and ultimately improving the working efficiency of the drilling rig. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 The present invention is a schematic structural diagram of a drilling rig rotary joint assembly according to an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Sealing end cover; 101. First axial through hole; 1011. Second through hole; 2. Rotating shaft; 201. Second axial through hole; 3. Rotating shaft housing; 301. Protrusion; 4. Sealing assembly; 401. Sealing element; 5. Gasket assembly; 501. Adjusting gasket; 6. Oil passage; 7. Oil nozzle; 8. Bearing. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0039] The existing rotary structure uses a sealing ring for sealing, which is constantly worn and consumed, has a short service life, and needs to be replaced frequently, resulting in a low working efficiency of the drilling rig. The embodiment of the utility model provides a detachable gasket assembly between the sealing end cover and the rotating shaft housing. After the sealing assembly is worn, the gasket assembly is disassembled and the sealing assembly is squeezed to compensate for the worn part of the sealing assembly, thereby increasing the service life of the sealing assembly, reducing the replacement frequency of the sealing assembly, and improving the working efficiency of the drilling rig.

[0040] Combine the following Figure 1 , describing an embodiment of the utility model.

[0041] According to an embodiment of the present utility model, on the one hand, as Figure 1 As shown, a drilling rig rotary joint assembly is provided, which mainly includes: a sealing end cover 1, a rotating shaft 2, a rotating shaft housing 3, a sealing component 4 and a gasket component 5. The sealing end cover 1 is provided with a first axial through hole 101, which is suitable for connecting with the mud conveying pipeline of the drilling rig. One end of the rotating shaft 2 is rotatably arranged in the first axial through hole 101, and a gap is left with the inner wall of the first axial through hole 101, and the other end is suitable for connecting with the output shaft of the drilling rig. The rotating shaft housing 3 is movably sleeved on the rotating shaft 2 and connected to the sealing end cover 1. A sealing cavity is formed between the outer peripheral surface of the rotating shaft 2, the inner wall of the sealing end cover 1 and one end surface of the rotating shaft housing 3. The sealing component 4 is arranged at the gap between the sealing end cover 1 and the rotating shaft 2, and is located in the sealing cavity. The gasket component 5 is detachably arranged at the connection between the sealing end cover 1 and the rotating shaft housing 3.

[0042] The sealing assembly 4 provided in the embodiment of the utility model can effectively seal the mud transported by the mud transport pipeline, prevent the mud from leaking at the connection between the sealing end cover 1 and the rotating shaft 2, and improve the reliability of the drilling rig. Compared with the traditional method of using multiple groups of V-shaped sealing rings or packing seals. After the sealing assembly 4 is worn, the embodiment of the utility model can reduce the space of the sealing cavity by disassembling the gasket assembly 5 at the connection between the sealing end cover 1 and the rotating shaft housing 3 to squeeze the sealing assembly 4, thereby compensating for the worn part of the sealing assembly 4, increasing the service life of the sealing assembly 4, reducing the replacement frequency of the sealing assembly 4, and ultimately improving the working efficiency of the drilling rig.

[0043] Specifically, the sealing end cover 1 is fixedly connected to the mud conveying pipeline, and the first axial through hole 101 of the sealing end cover 1 is in communication with the mud conveying pipeline to receive the mud conveyed by the mud conveying pipeline. The mud is then input to the drill bit of the drilling rig through the rotating shaft 2. The rotating shaft 2 rotates with the output shaft of the drilling rig. The rotating shaft housing 3 is fixedly connected to the sealing end cover 1.

[0044] It should be noted that when mud overflows from the connection between the sealing end cover 1 and the rotating shaft 2 , it indicates that the sealing assembly 4 has been worn out and failed. At this time, it is necessary to remove the gasket assembly 5 and squeeze the sealing assembly 4 to delay the replacement time of the sealing assembly 4 .

[0045] In one embodiment, Figure 1 As shown, the end face of one side of the rotating shaft housing 3 close to the sealing end cover 1 extends axially to form a protrusion 301. The protrusion 301 is partially inserted into the first axial through hole 101 and abuts against the sealing component 4. A sealing cavity is formed between the end face of the protrusion 301 and the outer peripheral surface of the rotating shaft 2 and the end face of one side of the rotating shaft housing 3. After the gasket assembly 5 is disassembled, the protrusion 301 can continue to be inserted into the first axial through hole 101, thereby reducing the length of the sealing cavity in the axial direction of the rotating shaft 2, so as to squeeze the sealing component 4 and compensate for the worn part of the sealing component 4. The structure is simple and easy to use.

[0046] It should be noted that the connection between the sealing end cover 1 and the rotating shaft housing 3 can be a clamping type fixed structure, such as a buckle and a slot connection, which is quick to install, or a fastener type fixed structure, such as a screw or bolt connection, which is low in cost. In this regard, the embodiments of the utility model do not impose too many restrictions.

[0047] In order to facilitate the removal of the gasket assembly 5, in one embodiment, the sealing end cover 1 is detachably connected to the shaft housing 3 by a fastener. The fastener can be a conventional fastener such as a screw or a bolt. The gasket assembly 5 includes a plurality of stacked adjustment gaskets 501, and the plurality of adjustment gaskets 501 are all sleeved on the outer periphery of the protrusion 301.

[0048] In the embodiment of the utility model, after the seal assembly 4 is worn, the fasteners are first loosened to disassemble the seal end cover 1 and the shaft housing 3, and then at least one adjustment gasket 501 is disassembled according to the wear condition of the seal assembly 4, thereby reducing the length of the seal cavity in the axial direction of the shaft 2, squeezing the seal assembly 4, and compensating the worn portion of the seal assembly 4. A plurality of adjustment gaskets 501 are provided, and the seal assembly 4 can be disassembled multiple times and squeezed step by step, further increasing the service life of the seal assembly 4.

[0049] It should be noted that the embodiment of the utility model does not limit the structure of the adjustment gasket 501, and the adjustment gasket 501 can select any existing structure as needed, such as a stainless steel gasket. In addition, there is no limit on the number of adjustment gaskets 501, and two, three or more than three can be selected as needed.

[0050] Furthermore, in one embodiment, each adjusting gasket 501 includes two arc-shaped pieces. The two arc-shaped pieces can be spliced ​​into a ring shape. The two arc-shaped pieces in a pair can be installed or withdrawn at the same time. After the fasteners are loosened, the arc-shaped pieces can be directly withdrawn from the side without completely disassembling the sealing end cover 1 and the rotating shaft housing 3, which facilitates the quick disassembly and installation of the adjusting gasket 501, further improving the working efficiency of the drilling rig.

[0051] It is understandable that, in some other embodiments, each adjusting gasket 501 may be provided with three or more arc-shaped pieces as required. In the case where each adjusting gasket 501 is provided with three arc-shaped pieces, the three arc-shaped pieces are spliced ​​into a ring shape.

[0052] Exemplarily, the sealing end cover 1 is connected to the rotating shaft housing 3 by bolts. After the sealing assembly 4 is worn, the bolts between the sealing end cover 1 and the rotating shaft housing 3 are loosened first. The adjusting gasket 501 is loosened accordingly, and at this time, the number of paired arc-shaped pieces can be selected to be pulled out so that the protrusion 301 can continue to be inserted into the first axial through hole 101, thereby reducing the axial length of the sealing cavity in the rotating shaft 2, squeezing the sealing assembly 4, compensating for the worn part of the sealing assembly 4, and extending the service life of the sealing assembly 4.

[0053] In one embodiment, Figure 1 As shown, the sealing assembly 4 includes a plurality of stacked sealing members 401. An oil passage 6 is provided between two adjacent sealing members 401. The oil passage 6 can be used to achieve effective lubrication between the plurality of sealing members 401, reduce the wear of the plurality of sealing members 401, and further improve the service life of the sealing members 401.

[0054] It should be noted that the embodiment of the utility model does not limit the structure of the seal 401. The seal 401 can adopt any existing structure. For example, the seal 401 can adopt a V-shaped seal ring. In addition, each seal 401 can be coated with lubricating oil. The two seals 401 located on the outermost side can also be provided with sealing fillers to seal the oil and prevent oil leakage.

[0055] In addition, the embodiment of the utility model does not limit the number of the sealing members 401, and two, three or more sealing members 401 can be selected as needed. Figure 1 As shown, five sealing members 401 are provided, two of which are located on one side of the oil passage 6 close to the shaft housing 3 , and the other three are located on the other side opposite to the oil passage 6 .

[0056] Further, in one embodiment, if Figure 1As shown, the sealing end cover 1 is also provided with an oil inlet passage connected to the oil passage 6, and an oil nozzle 7 is provided at the port of the oil inlet passage. By utilizing the oil inlet passage connected to the oil passage 6 on the sealing end cover 1, and providing the oil nozzle 7 at the port of the oil inlet passage, oil can be supplied to the oil passage 6, and oil leakage can be avoided at the same time.

[0057] Specifically, the oil nozzle 7 may be cylindrical and have an oil injection hole, from which oil may be injected into the oil inlet passage, and the oil enters the oil passage 6 through the oil inlet passage to provide lubrication for the plurality of seals 401 .

[0058] Therefore, the oil supplied to the oil passage 6 through the oil inlet passage in the utility model embodiment is lubricating oil. The lubricating oil can be selected from any existing type. In order to reduce the use cost, in one embodiment, the lubricating oil is butter.

[0059] In one embodiment, Figure 1 As shown, the first axial through hole 101 includes a first through hole and a second through hole 1011 that are coaxial and connected. The aperture of the first through hole is larger than the aperture of the second through hole 1011. A step surface is formed at the connection between the first through hole and the second through hole 1011. The rotating shaft 2 and the sealing assembly 4 are arranged in the first through hole, and the second through hole 1011 is suitable for connecting with the mud conveying pipeline of the drilling rig.

[0060] The embodiment of the utility model utilizes the first through hole to install the rotating shaft 2 and the sealing assembly 4. The step surface at the connection between the first through hole and the second through hole 1011 can effectively support the sealing assembly 4. Since the second through hole 1011 is connected to the mud conveying pipeline of the drilling rig, the mud in the mud conveying pipeline can be conveyed to the second through hole 1011, and then input into the rotating shaft 2 through the second through hole 1011. At the same time, the sealing assembly 4 is arranged in the first through hole, which can prevent the mud from leaking from the first through hole.

[0061] Further, in one embodiment, the rotating shaft 2 is provided with a second axial through hole 201. The second axial through hole 201 is communicated with the second through hole 1011. Since the second axial through hole 201 of the rotating shaft 2 is communicated with the second through hole 1011, the mud received from the mud conveying pipeline by the second through hole 1011 will enter the second axial through hole 201, and then enter the drill rod of the drilling rig through the second axial through hole 201, and finally be ejected from the drill bit to play the role of lubrication, cooling, wall protection, chip removal, etc.

[0062] It should be noted that the embodiment of the utility model does not limit the rotatable connection method between the rotating shaft 2 and the rotating shaft housing 3, and any existing structure can be selected as needed.

[0063] In one embodiment, Figure 1As shown, the drilling rig rotary joint assembly also includes a bearing 8. The rotating shaft 2 is rotatably connected to the rotating shaft housing 3 through the bearing 8. The bearing 8 can withstand a large radial force, can prevent the rotating shaft 2 and the rotating shaft housing 3 from being subjected to a large impact force, and is conducive to improving the movement stability of the rotating shaft 2.

[0064] The working principle of the embodiment of the utility model is as follows:

[0065] Under normal circumstances, the mud conveying pipeline first conveys the mud to the second through hole 1011 of the sealing end cover 1, then enters the second axial through hole 201 of the rotating shaft 2, and finally enters the output shaft of the drilling rig, and enters the drill bit through the drill pipe, and is ejected from the drill bit. The sealing assembly 4 seals the connection between the sealing end cover 1 and the rotating shaft 2 to prevent mud leakage.

[0066] In the case where the seal assembly 4 is damaged and causes mud leakage, first loosen the bolts between the seal end cover 1 and the shaft housing 3, and then selectively withdraw a certain number of arc-shaped pieces as needed, so that the protrusion 301 can continue to be inserted into the first axial through hole 101, shortening the length of the seal cavity in the axial direction of the shaft 2, thereby squeezing the seal assembly 4 and compensating for the worn part of the seal assembly 4.

[0067] In addition, oil is injected into the oil inlet passage from the oil filling hole of the oil nozzle 7 , and the oil enters the oil passage 6 through the oil inlet passage to provide lubrication for the multiple sealing components 401 .

[0068] According to an embodiment of the utility model, on the other hand, a drilling rig is provided, which mainly includes: a mud conveying pipeline, a driving member and a drilling rig rotary joint assembly. The driving member is provided with an output shaft. The sealing end cover 1 is connected to the mud conveying pipeline, and the rotating shaft 2 is connected to the output shaft.

[0069] Because the drilling rig includes a drilling rig rotary joint assembly, it has the same effect as the drilling rig rotary joint assembly, that is, the sealing component 4 can effectively seal the mud transported by the mud transport pipeline, prevent the mud from leaking at the connection between the sealing end cover 1 and the rotating shaft 2, and improve the reliability of the drilling rig. After the sealing component 4 is worn, by removing the gasket component 5 at the connection between the sealing end cover 1 and the rotating shaft housing 3, the space of the sealing cavity can be reduced to squeeze the sealing component 4, so as to compensate for the worn part of the sealing component 4, improve the service life of the sealing component 4, reduce the replacement frequency of the sealing component 4, and finally improve the working efficiency of the drilling rig.

[0070] Specifically, the drilling rig includes but is not limited to a horizontal directional drilling rig, a vertical drilling rig, and a double-arm drilling rig. The driving member can select any existing structure, such as a driving motor. In addition, the specific ratio of the mud needs to be selected according to the construction environment of the drilling rig. Since the mud needs to be recycled, the mud usually contains sediment and gravel particles.

[0071] In order to realize the basic functions of the drilling rig, the drilling rig in this embodiment may also include other necessary modules or components, such as a drill bit, a drill rod, a mud pump, etc. It should be noted that the other necessary modules or components included in the drilling rig may be any suitable existing structure. In order to clearly and briefly describe the technical solution provided by this embodiment, the above part will not be described in detail here, and the drawings in the specification are also simplified accordingly. However, it should be understood that the scope of the utility model is not limited by this.

[0072] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A drilling rig rotary joint assembly, characterized in that: include: The sealing end cover (1) is provided with a first axial through hole (101) and is suitable for connecting to a mud conveying pipeline of a drilling rig; A rotating shaft (2), one end of which is rotatably disposed in the first axial through hole (101) and has a gap with the inner wall of the first axial through hole (101), and the other end of which is suitable for connection with the output shaft of the drilling rig; A rotating shaft housing (3) is movably sleeved on the rotating shaft (2) and connected to the sealing end cover (1); A sealed cavity is formed between the outer peripheral surface of the rotating shaft (2), the inner wall of the sealing end cover (1) and one side end surface of the rotating shaft housing (3); A sealing component (4) is arranged at a gap between the sealing end cover (1) and the rotating shaft (2) and is located in the sealing cavity; A gasket assembly (5) is detachably arranged at the connection between the sealing end cover (1) and the rotating shaft housing (3).

2. The drilling rig rotary joint assembly according to claim 1, characterized in that: A protrusion (301) is formed on one end surface of the shaft housing (3) close to the sealing end cover (1) along the axial direction, and a portion of the protrusion (301) is inserted into the first axial through hole (101) and abuts against the sealing assembly (4).

3. The drilling rig rotary joint assembly according to claim 2, characterized in that: The sealing end cover (1) is detachably connected to the rotating shaft housing (3) via a fastener, and the gasket assembly (5) comprises a plurality of stacked adjustment gaskets (501), wherein the plurality of adjustment gaskets (501) are all sleeved on the outer periphery of the raised portion (301).

4. The drilling rig rotary joint assembly according to claim 3, characterized in that: Each of the adjusting gaskets (501) comprises at least two arc-shaped pieces.

5. The drilling rig rotary joint assembly according to claim 1, characterized in that: The sealing assembly (4) comprises a plurality of stacked sealing members (401), wherein an oil passage (6) is provided between two adjacent sealing members (401).

6. The drilling rig rotary joint assembly according to claim 5, characterized in that: The sealing end cover (1) is also provided with an oil inlet passage communicating with the oil passage (6), and an oil nozzle (7) is provided at the port of the oil inlet passage.

7. The drilling rig rotary joint assembly according to any one of claims 1 to 6, characterized in that: The first axial through hole (101) comprises a first through hole and a second through hole (1011) which are connected to each other. The aperture of the first through hole is larger than the aperture of the second through hole (1011). A step surface is formed at the connection between the first through hole and the second through hole (1011). The rotating shaft (2) and the sealing assembly (4) are arranged in the first through hole. The second through hole (1011) is suitable for being connected to a mud conveying pipeline of a drilling rig.

8. The drilling rig rotary joint assembly according to claim 7, characterized in that: The rotating shaft (2) is provided with a second axial through hole (201), and the second axial through hole (201) is communicated with the second through hole (1011).

9. The drilling rig rotary joint assembly according to any one of claims 1 to 6, characterized in that: It also comprises a bearing (8), and the rotating shaft (2) is rotatably connected to the rotating shaft housing (3) via the bearing (8).

10. A drilling rig, characterized in that: include: Mud transport pipeline; A driving member having an output shaft; In the drilling rig rotary joint assembly according to any one of claims 1 to 9, the sealing end cover (1) is connected to the mud conveying pipeline, and the rotating shaft (2) is connected to the output shaft.

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