Sealing device and drilling machine

Abstract

The utility model relates to the technical field of mining machinery, and discloses a sealing device and a drilling machine, the sealing device comprises a slag guide assembly and a plugging assembly, the slag guide assembly comprises a plurality of slag guide plates with matching positions, and the matching positions of the plurality of slag guide plates are encircled to form a through hole for a drill rod to pass through; the plugging assembly comprises an elastic piece and plugging pieces arranged at the matching positions, and the plugging pieces are movably arranged at the matching positions in the radial direction of the through hole. According to the sealing device, the plugging sleeve is defined by the multiple plugging pieces capable of moving in the radial direction of the through hole, the plugging sleeve is tightly attached to the outer wall of the drill rod, meanwhile, the elastic piece is arranged between the slag guide plate and the matching position, and when the drill rod is driven by the tool bit to generate vibration, the elastic piece is tightly attached to the outer wall of the drill rod. The plugging sleeve can always cling to the outer wall of the drill rod under the action of the elastic piece and vibrate along with the outer wall, a gap is prevented from being generated between the outer wall of the drill rod and the plugging assembly, and the sealing reliability of the drill rod is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining machinery, and particularly relates to a sealing device and a drill rig. Background Art

[0002] A raise boring machine is a tunneling machine that uses tools to drill a well; in the blind raise boring construction of an underground mine, during the operation of the drill rig, the drilling is generally carried out from bottom to top to form a well. A large amount of muck will be generated on the rock cutting surface by the tools. To prevent the muck from affecting the normal operation of the drill rig, a muck hopper box is usually arranged around the drill pipe to collect the muck and guide the moving direction of the muck.

[0003] Currently, during the operation of the existing drill rig, since the tools will drive the drill pipe to vibrate continuously during operation, this vibration will damage the sealing structure of the drill pipe, causing a gap to form between the drill pipe and the sealing structure. The muck is likely to fall along this gap into the rotary drive part, thereby accelerating the wear of the drill rig, affecting the normal operation of the internal components of the drill rig, and easily causing the drill rig to be damaged or even scrapped, thus affecting the construction progress. Summary of the Invention

[0004] In view of this, the present invention provides a sealing device and a drill rig to solve the problem of poor reliability of the sealing method of the drill pipe in the existing drill rigs.

[0005] In a first aspect, the present invention provides a sealing device for sealing the drill pipe of a drill rig, including a slag guiding component and a plugging component. The slag guiding component includes a plurality of slag guiding plates with mating positions. The mating positions of the plurality of slag guiding plates surround and form a through hole for the drill pipe to pass through. The slag guiding component has an open state in which the slag guiding plates move away from the drill pipe to an open position, and a closed state in which the slag guiding plates move close to the drill pipe and form the through hole. The plugging component includes an elastic member and a plugging member arranged at each mating position. The plugging member is movably arranged along the radial direction of the through hole at the mating position. The elastic member is located between the plugging member and the mating position. The plurality of plugging members surround and form a plugging sleeve that mates with the outer wall of the drill pipe.

[0006] Beneficial Effects: In the sealing device of the present application, a through hole for accommodating the drill pipe is formed by surrounding the drill pipe with a plurality of slag guiding plates, and a plugging member is arranged on the slag guiding plates. An elastic member is arranged between the plugging member and the slag guiding plate. After the plurality of plugging members surround and form a plugging sleeve, the plugging sleeve can always closely adhere to the outer wall of the drill pipe under the action of the elastic member. When the drill pipe vibrates driven by the cutter head, the plugging sleeve can closely adhere to the outer wall of the drill pipe and vibrate along with it. Therefore, it can avoid the generation of a gap between the plugging sleeve and the drill pipe, and further avoid the situation where muck and other particulate matters fall through the gap. The stability and reliability of the drill pipe sealing are improved through a simple and reliable structure, effectively solving the problem of poor reliability of the sealing method of the drill pipe in the existing drill rigs.

[0007] In an alternative embodiment, a first groove is circumferentially formed along the inner wall of the plug sleeve close to the drill pipe, and a communication hole communicating with the first groove is arranged inside the plug sleeve. The first groove is adapted to communicate with a sealing liquid source through the communication hole.

[0008] Advantageous effects: By using the communication hole to communicate with the sealing liquid source, the sealing liquid can be connected between the inner wall of the plug sleeve and the outer wall of the drill pipe, forming a certain lubrication between the plug sleeve and the drill pipe, reducing the relative wear between the two. At the same time, a certain hydraulic pressure can be formed between the plug sleeve and the drill pipe to prevent liquid impurities such as mud from passing through the gap between the drill pipe and the plug sleeve, further improving the sealing performance of the drill pipe. In addition, the first groove is circumferentially formed along the inner wall of the plug sleeve close to the drill pipe and communicates with the communication hole, that is, the sealing liquid can flow into the first groove through the communication hole and form a hydraulic pressure between the drill pipe and the plug sleeve in the first groove, enabling the sealing liquid to be evenly distributed between the drill pipe and the plug sleeve and ensuring the stable and reliable hydraulic pressure of the sealing liquid.

[0009] In an alternative embodiment, the communication hole is obliquely arranged along the direction close to the drill pipe.

[0010] Advantageous effects: When the sealing liquid passes through the communication hole, it forms a jet flow obliquely, and when it contacts the drill pipe, it can form a water film flowing in a fixed direction on the surface of the drill pipe, forming a stable hydraulic pressure between the drill pipe and the plug sleeve, and further improving the hydraulic stability of the sealing liquid between the plug sleeve and the drill pipe.

[0011] In an alternative embodiment, the slag guide plate is provided with a liquid inlet hole communicating with the communication hole.

[0012] Advantageous effects: By arranging the liquid inlet hole on the slag guide plate, a stable hydraulic pressure is applied to the plugging assembly through the slag guide plate, avoiding the influence of the vibration of the plug sleeve with the drill pipe on the sealing liquid.

[0013] In an alternative embodiment, a plurality of second grooves are further circumferentially arranged along the inner wall of the plug sleeve close to the drill pipe, and the second grooves are located below the first grooves.

[0014] Advantageous effects: By arranging the second grooves below the first grooves, part of the sealing liquid will be retained in the second grooves when the sealing liquid flows through the second grooves. The sealing liquid retained in the second grooves can play a certain role in lubrication and cooling between the drill pipe and the sealing sleeve.

[0015] In an alternative embodiment, the elastic members are arranged radially along the through hole, and the number of the elastic members is multiple and they are arranged at intervals along the circumference of the through hole.

[0016] Beneficial effects: The elastic members are arranged at intervals along the circumferential direction of the through hole, enabling the sealing sleeve to always closely adhere to the drill pipe in any direction under the action of the elastic members when the drill pipe vibrates irregularly, improving the stability of the sealing device; in addition, when the drill pipe vibrates, it drives the plugging sleeve surrounding the outer wall of the drill pipe to move in the radial direction, and the elastic members are arranged along the radial direction of the through hole, so that the elastic members can timely compensate for the displacement of the drill pipe, enabling the plugging member to stably adhere to the side wall of the drill pipe.

[0017] In an alternative embodiment, a third groove is formed on the side of the plugging assembly facing away from the drill pipe, at least a part of the slag guiding plate is inserted into the third groove and cooperates with the side wall of the third groove, and the elastic member is located in the third groove.

[0018] Beneficial effects: By inserting the slag guiding plate into the third groove and arranging the elastic member in the third groove, a cavity is formed between the slag guiding plate and the third groove, and the elastic member is arranged in this cavity and abuts against the slag guiding plate and the third groove. In this way, the side wall of the third groove can play a certain guiding role in the relative displacement between the plugging member and the slag guiding plate, and the annular cavity can prevent the elastic member from being exposed to sundries such as ore slurry, reducing the risk of damage and prolonging the service life.

[0019] In an alternative embodiment, the slag guiding assembly further includes a sealing member, and the sealing member is located between the slag guiding plate and the inner wall of the third groove.

[0020] Beneficial effects: By arranging the sealing member, the annular cavity is further sealed, preventing sundries such as ore slurry from entering the annular cavity through the gap between the side wall of the third groove and the slag guiding plate, and improving the sealing performance of the annular cavity.

[0021] In an alternative embodiment, the slag guiding assembly further includes a positioning member, a mating hole for the positioning member to pass through is provided on the side wall of the third groove, and a limiting hole mating with the positioning member is provided on the slag guiding assembly.

[0022] Beneficial effects: By using the positioning member to cooperate with the mating hole and the limiting hole respectively, the slag guiding plate and the plugging member can be locked to each other, preventing relative rotation along the axis of the through hole and improving the structural stability.

[0023] In an alternative embodiment, the aperture of the limiting hole is larger than that of the positioning member.

[0024] Beneficial effects: By setting the aperture of the limiting hole, the positioning member can move within a certain range in the limiting hole. Since the positioning member passes through the mating hole and is fixed to the plugging member, the limiting hole restricts the relative displacement range between the plugging member and the slag guiding plate by restricting the positioning member, improving the structural stability.

[0025] In a second aspect, the present invention further provides a drilling rig, which includes a main body, a drill pipe, and the above-mentioned sealing device. The above-mentioned sealing device is movably arranged on the main body and is used to seal the drill pipe. Since this drilling rig includes the above-mentioned sealing device, it has the same effects as the above-mentioned sealing device, which will not be elaborated here. Description of the Drawings

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a cross-sectional view of an assembled sealing device according to an embodiment of the present utility model;

[0028] Figure 2 is Figure 1 an enlarged schematic view of part A of the shown sealing device;

[0029] Figure 3 is Figure 1 a cross-sectional view of another side of the shown sealing device;

[0030] Figure 4 is Figure 3 an enlarged schematic view of part B of the shown sealing device;

[0031] Figure 5 is Figure 1 a three-dimensional schematic view of the shown sealing device in a cut-open state;

[0032] Figure 6 is Figure 5 an enlarged schematic view of part C of the shown sealing device;

[0033] Figure 7 is Figure 6 a cut-open schematic view of the plugging member of the shown sealing device;

[0034] Figure 8 is Figure 1 a three-dimensional schematic view of the shown sealing device in a closed state;

[0035] Figure 9 is Figure 1 a three-dimensional schematic view of the shown sealing device in an open state.

[0036] Description of the Reference Numerals:

[0037] 1. Plugging assembly; 101. Elastic member; 102. Plugging member; 103. First groove; 104. Communication hole; 105. Second groove; 106. Third groove; 107. Matching hole;

[0038] 2. Slag guiding assembly; 201. Slag guiding plate; 2011. Slag guiding surface; 2012. Slag guiding port; 202. Sealing member; 203. Positioning member; 205. Limiting hole; 206. Liquid inlet hole;

[0039] 3. Drill pipe. Specific embodiments

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] The following combines Figures 1 to 9 , to describe the embodiments of the present invention.

[0042] According to an embodiment of the present invention, on the one hand, the present invention provides a sealing device for sealing a drill pipe 3 of a drilling rig, including a slag guiding assembly 2 and a plugging assembly 1. The slag guiding assembly 2 includes a plurality of slag guiding plates 201 with mating positions. The mating positions of the plurality of slag guiding plates 201 surround and form a through hole for the drill pipe 3 to pass through. The slag guiding assembly 2 has an open state in which the slag guiding plate 201 moves away from the drill pipe 3 to an open position, and a closed state in which the slag guiding plate 201 moves closer to the drill pipe 3 and forms a through hole; the plugging assembly 1 includes an elastic member 101 and a plugging member 102 provided at each mating position. The plugging member 102 is movably provided along the radial direction of the through hole at the mating position. The elastic member 101 is located between the plugging member 102 and the mating position. The plurality of plugging members 102 surround and form a plugging sleeve that mates with the outer wall of the drill pipe 3.

[0043] Applying the sealing device of this embodiment, a through hole for accommodating the drill pipe 3 is formed by enclosing with multiple slag guiding plates 201, and a blocking member 102 is arranged on the slag guiding plate 201. An elastic member 101 is arranged between the blocking member 102 and the slag guiding plate 201. After the multiple blocking members 102 enclose to form a blocking sleeve, the blocking sleeve can always closely adhere to the outer wall of the drill pipe 3 under the action of the elastic member 101. When the drill pipe 3 vibrates driven by the cutter head, the blocking sleeve can closely adhere to the outer wall of the drill pipe 3 and vibrate together with it. Therefore, it can avoid the generation of gaps between the blocking sleeve and the drill pipe 3, and further avoid the situation that particulate matters such as muck fall through the gaps. The stability and reliability of the sealing of the drill pipe 3 are improved through a simple and reliable structure, effectively solving the problem of poor reliability of the sealing method of the drill pipe in the existing drilling rigs.

[0044] It should be noted that both ends of the elastic member 101 respectively abut against the slag guiding plate 201 and the blocking member 102; the through hole is the hole position in the blocking sleeve for the drill pipe 3 to pass through. The cooperation positions of the multiple slag guiding plates 201 enclose to form the through hole. The slag guiding plate 201 and the blocking member 102 are both arranged along the circumferential direction of the through hole. The open state means that the slag guiding plate 201 drives the blocking member 102 to move to the open position, at this time the through hole is opened and the drill pipe 3 and the cutter head can pass through; the closed state means that the slag guiding plate 201 drives the blocking member 102 to move to form the through hole so that the blocking member 102 closely adheres to the outer wall of the drill pipe 3.

[0045] Specifically, referring to Figure 8 and Figure 9 , Figure 8 is the open state where the slag guiding plate 201 drives the blocking member 102 to move to the open position. At this time, both the slag guiding plate 201 and the blocking member 102 are in the open position; Figure 9 is the closed state where the slag guiding plate 201 drives the blocking member 102 to approach the drill pipe 3 to form the through hole.

[0046] In addition, the blocking sleeve is composed of multiple blocking members 102 that closely adhere to the outer wall of the drill pipe 3. The inner wall of the blocking sleeve is composed of the side walls of the multiple blocking members 102 that closely adhere to the drill pipe 3, and is used to cooperate with the drill pipe 3 and always closely adhere to the drill pipe 3 under the action of the elastic member 101 to maintain the sealing of the drill pipe 3.

[0047] Furthermore, the blocking sleeve includes at least two blocking members 102. Specifically, as shown in Figure 5 and Figure 7 , the blocking sleeve is composed of two blocking members 102 spliced together and cooperates with the outside of the drill pipe 3; when there are more than two blocking members 102, all the blocking members 102 enclose to form the blocking sleeve and all cooperate with the outside of the drill pipe 3.

[0048] Among them, a detachable connection can be arranged between any two blocking members 102. The detachable connection method can be but is not limited to snap connection, bolt connection, magnetic connection, pin connection, key connection, etc.

[0049] In addition, the slag guiding component 2 is a component fixedly connected to the main body of the drilling rig, which is used to fix the sealing device and can drive the plugging member 102 to switch between the open state and the closed state under the control of the drilling rig.

[0050] Wherein, there are multiple slag guiding plates 201, all of which can move along the radial direction of the through hole to realize the switching between the open state and the closed state; and one or more mating positions can be provided on the slag guiding plate 201 for setting the plugging member 102.

[0051] It should also be noted that the elastic member 101 is arranged between the slag guiding plate 201 and the plugging member 102, and the elastic member 101 is squeezed whether in the open state or the closed state, so as to abut against the slag guiding plate 201 and the plugging member 102 and apply pressure to the plugging member 102 to make the plugging member 102 closely adhere to the outer wall of the drill pipe 3.

[0052] When the drill pipe 3 vibrates, the displacement generated by the vibration of the plugging member 102 along with the drill pipe 3 is compensated by the elastic member 101, so that the plugging member 102 arranged along the circumferential direction of the drill pipe 3 can still closely adhere to the outer wall of the drill pipe 3.

[0053] In addition, the number of the elastic members 101 can be one or more. When there is only one elastic member 101, the elastic member 101 is respectively connected to the slag guiding plate 201 and the plugging member 102 and can apply elastic forces to the plugging member 102 in multiple directions respectively, so that the plugging sleeve can closely adhere to the outer wall of the drill pipe 3.

[0054] In addition, referring to Figure 1 , the "up" in the figure is the upper side described in the present application, and the "down" in the figure is the lower side described in the present application, which is also the direction in which sundries such as muck and mud fall.

[0055] In an optional implementation manner, a first groove 103 is circumferentially formed on the inner wall of the plugging sleeve close to the drill pipe 3, and a communication hole 104 communicating with the first groove 103 is arranged inside the plugging sleeve. The first groove 103 is adapted to communicate with a sealing liquid source through the communication hole 104.

[0056] In this way, by using the communication hole 104 to communicate with the sealing liquid source, the sealing liquid can communicate between the inner wall of the plugging sleeve and the outer wall of the drill pipe 3, so as to form a certain lubrication between the plugging sleeve and the drill pipe 3, reduce the relative wear of the two, and at the same time form a certain hydraulic pressure between the plugging sleeve and the drill pipe 3 to prevent liquid impurities such as mud from passing through the gap between the drill pipe 3 and the plugging sleeve, further improving the sealing performance of the drill pipe 3.

[0057] In addition, the first groove 103 is circumferentially formed on the inner wall of the sealing sleeve close to the drill pipe 3 and is communicated with the communication hole 104. That is, the sealing liquid can flow into the first groove 103 through the communication hole 104 and can form a hydraulic pressure between the drill pipe 3 and the sealing sleeve in the first groove 103, enabling the sealing liquid to be evenly distributed between the drill pipe 3 and the sealing sleeve and ensuring the stable and reliable hydraulic pressure of the sealing liquid.

[0058] It should be noted that the first groove 103 is recessed on the inner wall of the sealing sleeve. When the sealing sleeve is closely attached to the outer wall of the drill pipe 3, a cavity surrounding the drill pipe 3 is formed between the outer wall of the drill pipe 3 and the first groove 103, and the sealing liquid source is communicated with this cavity through the communication hole 104 and can input the sealing liquid into this cavity.

[0059] Furthermore, the sealing liquid enters the cavity through the communication hole 104 and flows to between the inner wall of the sealing sleeve and the outer wall of the drill pipe 3 along with the vibration of the drill pipe 3, forming a water film, which plays a role in lubrication and cooling.

[0060] It should also be noted that the number of the communication holes 104 can be one or more. When there are multiple communication holes 104, the communication holes 104 are circumferentially arranged at intervals on the inner wall of the sealing sleeve so that the sealing liquid can be evenly distributed in the cavity and between the inner wall of the sealing sleeve and the outer wall of the drill pipe 3.

[0061] Specifically, referring to Figure 6 and Figure 7 , multiple communication holes 104 are evenly spaced on the inner wall of the sealing sleeve.

[0062] Furthermore, the diameter of the upper end of the through hole formed by the sealing sleeve is larger than that of the lower end. Therefore, when there is a certain hydraulic pressure in the cavity, most of the sealing liquid will flow out from the upper end of the through hole, forming a stable upward liquid flow between the upper end of the inner wall of the sealing sleeve and the outer wall of the drill pipe 3, preventing debris such as rock cuttings and mud from invading the gap between the sealing sleeve and the drill pipe 3.

[0063] In an alternative embodiment, the communication hole 104 is obliquely arranged along the direction close to the drill pipe 3. In this way, when the sealing liquid passes through the communication hole 104, a jet of water is formed obliquely, and when it contacts the drill pipe 3, a water film flowing in a fixed direction can be formed on the surface of the drill pipe 3, forming a stable hydraulic pressure between the drill pipe 3 and the sealing sleeve and further improving the hydraulic stability of the sealing liquid between the sealing sleeve and the drill pipe 3.

[0064] It should be noted that the communication hole 104 is arranged on the sealing member 102 and extends obliquely upward from the side of the sealing member 102 facing away from the drill pipe 3 and passes through the sealing member 102 to communicate with the first groove 103.

[0065] In an alternative embodiment, the slag guide plate 201 is provided with a liquid inlet hole 206 communicating with the communication hole 104. By arranging the liquid inlet hole 206 on the slag guide plate 201, a stable hydraulic pressure is applied to the plugging assembly 1 through the slag guide plate 201, avoiding the influence of the vibration of the plugging sleeve following the drill pipe 3 on the sealing liquid.

[0066] It should be noted that the liquid inlet hole 206 is used to convey the sealing liquid to the communication hole 104 and the first groove 103, and is connected to other equipment of the drilling rig through the arrangement on the relevant plate.

[0067] In order to prevent the sealing liquid in the liquid inlet hole 206 and the communication hole 104 from being affected by the slag guide plate 201 and the plugging member 102, a liquid storage chamber can be provided between the liquid inlet hole 206 and the communication hole 104 for storing and transferring the sealing liquid.

[0068] In an alternative embodiment, a plurality of second grooves 105 are further provided along the circumferential direction on the inner wall of the plugging sleeve close to the drill pipe 3. The second grooves 105 are located below the first groove 103. By arranging the second grooves 105 below the first groove 103, part of the sealing liquid will be retained in the second grooves 105 when the sealing liquid flows through the second grooves 105. The sealing liquid retained in the second grooves 105 can play a certain role in lubricating and cooling between the drill pipe 3 and the sealing sleeve.

[0069] It should be noted that the second grooves 105 cooperate with the outer wall of the drill pipe 3 to form a cavity, and part of the sealing liquid can remain in the cavity and flow along the circumferential direction of the drill pipe 3 in the cavity, ensuring that the sealing liquid is evenly distributed between the side wall of the drill pipe 3 and the plugging sleeve.

[0070] In addition, one or more second grooves 105 can be provided, which can be set according to actual needs and will not be elaborated in this application.

[0071] In an alternative embodiment, the elastic members 101 are arranged along the radial direction of the through hole. The number of the elastic members 101 is multiple and they are arranged at intervals along the circumferential direction of the through hole. In this arrangement of the elastic members 101, when the drill pipe 3 vibrates irregularly, the sealing sleeve can always closely adhere to the drill pipe 3 under the action of the elastic members 101 in any direction, effectively improving the stability and reliability of the sealing device; in addition, when the drill pipe 3 vibrates, it drives the plugging sleeve surrounding the outer wall of the drill pipe 3 to move in the radial direction, and the elastic members 101 are arranged along the radial direction of the through hole, so that the elastic members 101 can timely compensate for the displacement of the drill pipe 3, enabling the plugging member 102 to stably adhere to the side wall of the drill pipe 3.

[0072] It should be noted that the elastic member 101 is arranged along the radial direction of the through hole, that is, when the elastic member 101 is compressed or elongated, it extends along the radial direction of the through hole, so that the elastic member 101 can also be squeezed when the drill pipe 3 vibrates slightly, and under the action of elastic force, the plugging member 102 is driven to closely adhere to the outer wall of the drill pipe 3, improving the self-compensation ability of the plugging member 102 when the vibration amplitude of the drill pipe 3 is too small.

[0073] In addition, a plurality of elastic members 101 are arranged at intervals along the circumferential direction of the through hole, so that the plurality of plugging members 102 can move under the action of different elastic members 101 respectively, thereby improving the self-compensation ability of the plugging sleeve.

[0074] It can be foreseen that the more the number of the elastic members 101, the denser the distribution in all directions of the through hole, and the stronger the sensitivity and mobility of the plugging sleeve moving with the drill pipe 3.

[0075] Specifically, the elastic member 101 is arranged as a spring, and a plurality of springs are arranged along the circumferential direction of the drill pipe 3.

[0076] It can be foreseen that the amplitude of the spring being squeezed changes with the vibration amplitude of the drill pipe 3. When the vibration of the drill pipe 3 increases, the radial displacement of the drill pipe 3 increases. At this time, the drill pipe 3 drives the plugging member 102 to displace, so that the amplitude of the spring being squeezed also increases, while the amplitude of the spring on the other side being squeezed decreases. The springs on both sides form a resultant force opposite to the displacement direction of the plugging member 102 to counteract the displacement of the plugging member 102 and reduce the vibration amplitude of the drill pipe 3.

[0077] In an optional embodiment, a third groove 106 is formed on the side of the plugging assembly 1 facing away from the drill pipe 3. At least a part of the slag guiding plate 201 is inserted into the third groove 106 and cooperates with the side wall of the third groove 106. The elastic member 101 is located in the third groove 106. In this way, by inserting the slag guiding plate 201 into the third groove 106 and inserting the elastic member 101 into the third groove 106, a cavity is formed between the slag guiding plate 201 and the third groove 106. The elastic member 101 is arranged in this cavity and abuts against the slag guiding plate 201 and the third groove 106 respectively. The side wall of the third groove 106 can play a certain guiding role in the relative displacement between the plugging member 102 and the slag guiding plate 201, and the annular cavity can prevent the elastic member 101 from being exposed to sundries such as ore slurry, reducing the risk of damage and prolonging the service life.

[0078] It should be noted that the elastic member 101 abuts against the plugging member 102 and the slag guiding plate 201 respectively in the third groove 106, and is compressed or rebounds in the third groove 106. The amplitude of its compression or rebound can be judged by the length of the slag guiding plate 201 inserted into the third groove 106.

[0079] Specifically, refer to Figure 6 and Figure 7, on the side of the plugging member 102 facing away from the drill pipe 3, a third groove 106 is formed. The third grooves 106 on multiple plugging members 102 are connected to each other. The slag guiding plate 201 is at least partially inserted into the plugging member 102 and forms an annular cavity with the plugging member 102. The elastic member 101 abuts between the slag guiding plate 201 and the plugging member 102 in the annular cavity.

[0080] Further, the annular cavity is respectively communicated with the liquid inlet hole 206 on the slag guiding plate 201 and the communication hole 104, and can store part of the sealing liquid, and can avoid the influence of the relative displacement of the slag guiding plate 201 and the plugging member 102 on the sealing liquid.

[0081] In an optional embodiment, the slag guiding assembly 2 further includes a sealing member 202. The sealing member 202 is located between the inner wall of the slag guiding plate 201 and the third groove 106. By providing the sealing member 202 in this way, the annular cavity is further sealed, and impurities such as ore slurry are prevented from entering the annular cavity through the gap between the side wall of the third groove 106 and the slag guiding plate 201, improving the sealing performance of the annular cavity.

[0082] It should be noted that sealing members 202 are provided in the gaps between the inner wall of the slag guiding plate 201 and the third groove 106, that is, the sealing members 202 are arranged along the circumferential direction of the part of the slag guiding plate 201 inserted into the third groove 106 to seal the cavity formed between the slag guiding plate 201 and the third groove 106.

[0083] In an optional embodiment, the slag guiding assembly 2 further includes a positioning member 203. A mating hole 107 for the positioning member 203 to pass through is provided on the side wall of the third groove 106, and a limiting hole 205 mating with the positioning member 203 is provided on the slag guiding assembly 2. By using the cooperation of the positioning member 203 with the mating hole 107 and the limiting hole 205 respectively, the slag guiding plate 201 and the plugging member 102 can be locked to each other, avoiding relative rotation along the axis of the through hole, and improving the structural stability.

[0084] It should be noted that the positioning member 203 passes through the mating hole 107 and is fixedly matched with the mating hole 107. There are various ways to fix the positioning member 203 and the mating hole 107, which can be, but are not limited to, interference fit, pin, snap ring, etc.

[0085] In addition, the part of the positioning member 203 passing through the mating hole 107 extends into the limiting hole 205 to fix the slag guiding plate 201 and the plugging member 102, avoiding the separation of the plugging member 102 and the slag guiding plate 201 due to the abutment of the elastic member 101 and causing the plugging member 102 to fall off.

[0086] Among them, the limiting hole 205 can be configured as a structure capable of cooperating with the end of the positioning member 203 to limit the up and down movement of the positioning member 203.

[0087] Specifically, the limiting hole 205 can be configured in various shapes, such as circular, square, etc.

[0088] It should also be noted that each slag guiding plate 201 is provided with a mating hole 107, and each blocking member 102 is provided with a limiting hole 205 that mates therewith to fix the blocking member 102 on the slag guiding plate 201.

[0089] In an alternative embodiment, the aperture of the limiting hole 205 is larger than the positioning member 203. By setting the aperture of the limiting hole 205, the positioning member 203 can move within a certain range in the limiting hole 205, and the positioning member 203 passes through the mating hole 107 and is fixed to the blocking member 102. Therefore, the limiting hole 205 restricts the relative displacement range between the blocking member 102 and the slag guiding plate 201 by restricting the positioning member 203, improving the structural stability.

[0090] It should be noted that the aperture of the limiting hole 205 is larger than the positioning member 203. Therefore, the positioning member 203 can move in the limiting hole 205, and at the same time, the positioning member 203 is fixed to the slag guiding plate 201. That is, the movement trajectory of the positioning member 203 in the limiting hole 205 is the relative displacement trajectory of the slag guiding plate 201 and the blocking member 102; similarly, the movement range of the positioning member 203 in the limiting hole 205 is the relative displacement range of the slag guiding plate 201 and the blocking member 102.

[0091] In an alternative embodiment, as Figure 5 shown, a plurality of slag guiding plates 201 are inclined and the top surfaces form a slag guiding surface 2011. A slag guiding port 2012 is also provided on one side of the slag guiding plate 201. Particulate matters such as slag fall onto the slag guiding surface 2011 and can enter the slag guiding port 2012 by moving along the slag guiding surface 2011.

[0092] According to an embodiment of the present invention, on the other hand, a drilling rig is also provided, which includes a main body, a drill pipe 3, and the above-mentioned sealing device. The above-mentioned sealing device is movably arranged on the main body and is used to seal the drill pipe 3. Since this drilling rig includes the above-mentioned sealing device, it has the same effects as the above-mentioned sealing device and will not be elaborated here.

[0093] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A sealing device for sealing a drill pipe (3) of a drilling rig, characterized in that, including a slag guiding assembly (2), comprising a plurality of slag guiding plates (201) having mating positions, the mating positions of the plurality of slag guiding plates (201) enclosing a through hole for the drill pipe (3) to pass through, the slag guiding assembly (2) having an open state in which the slag guiding plates (201) move away from the drill pipe (3) to an open position, and a closed state in which the slag guiding plates (201) move close to the drill pipe (3) to form the through hole; a plugging assembly (1), comprising an elastic member (101) and a plugging member (102) disposed at each of the mating positions, the plugging member (102) being movably disposed in the mating position along the radial direction of the through hole, the elastic member (101) being located between the plugging member (102) and the mating position, and the plurality of plugging members (102) enclosing a plugging sleeve that mates with the outer wall of the drill pipe (3).

2. The sealing device according to claim 1, wherein A first groove (103) is circumferentially formed in the inner wall of the plugging sleeve close to the drill pipe (3), a communication hole (104) communicating with the first groove (103) is disposed inside the plugging sleeve, and the first groove (103) is adapted to communicate with a sealing liquid source through the communication hole (104).

3. The sealing device according to claim 2, wherein, The communication hole (104) is obliquely disposed in a direction close to the drill pipe (3); and / or, the slag guiding plate (201) is provided with a liquid inlet hole (206) communicating with the communication hole (104).

4. The sealing device according to claim 2, characterized in that A plurality of second grooves (105) are further circumferentially formed in the inner wall of the plugging sleeve close to the drill pipe (3), and the second grooves (105) are located below the first groove (103).

5. The sealing device according to any one of claims 1 to 4, characterized in that, The elastic member (101) is disposed along the radial direction of the through hole, and the number of the elastic members (101) is multiple and they are spaced apart circumferentially along the through hole.

6. The sealing device according to any one of claims 1 to 4, characterized in that, A third groove (106) is formed on a side of the plugging assembly (1) facing away from the drill pipe (3), at least a part of the slag guiding plate (201) is inserted into the third groove (106) and mates with the side wall of the third groove (106), and the elastic member (101) is located in the third groove (106).

7. The sealing device according to claim 6, characterized in that, The slag guiding assembly (2) further includes a sealing member (202), and the sealing member (202) is located between the slag guiding plate (201) and the inner wall of the third groove (106).

8. The sealing device according to claim 6, wherein, The slag guiding assembly (2) further includes a positioning member (203), a mating hole (107) for the positioning member (203) to pass through is provided on the side wall of the third groove (106), and a limiting hole (205) mating with the positioning member (203) is provided on the slag guiding assembly (2).

9. The sealing device according to claim 8, characterized in that, The aperture of the limiting hole (205) is larger than the positioning member (203).

10. A drilling rig, characterized in that, including; a main body; a drill pipe (3), movably disposed in the main body; the sealing device according to any one of claims 1 to 9, movably disposed in the main body and for sealing the drill pipe (3).

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