Water sealing structure for raise boring machine

Abstract

The utility model discloses a water sealing structure for a raise boring machine. The water sealing structure comprises a box body, the main shaft assembly is rotationally arranged on the box body in the vertical direction, the top end of the main shaft assembly extends out of the box body, and a vertically-through water passing channel is formed in the main shaft assembly; the water injection piece is provided with a water injection channel used for communicating with the water passing channel, the water injection piece is provided with an embedded part, the embedded part is embedded into the top of the inner side of the water passing channel and is coaxially and rotationally matched with the main shaft assembly, and two first rotary sealing rings which are vertically arranged at intervals are arranged between the outer circumferential wall of the embedded part and the inner circumferential wall of the water passing channel; a pressure oil channel separated from the water injection channel is arranged in the water injection piece, the pressure oil channel forms an oil injection port and an oil outlet in the peripheral wall of the water injection piece, the oil injection port is located on the upper side of the main shaft assembly, and the oil outlet is located between the two first rotary sealing rings. According to the water sealing structure for the raise boring machine, the risk that water flows into the box body can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of mining machinery, in particular to a water sealing structure for raise boring machines. Background Art

[0002] An important component in a raise boring machine is the water sealing structure, and its sealing performance has a direct impact on the water passing and drilling effect and drilling efficiency of the boring machine. The traditional water sealing structure of a raise boring machine is prone to damage, and when the seal is damaged, the operator often cannot know in time. As a result, after the seal is damaged, water leaks into the box body, leading to damage to the internal structural parts of the reduction gearbox. Therefore, there is an urgent need for a water sealing structure that can reduce the risk of water leaking into the box body. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a water sealing structure for a raise boring machine, which can reduce the risk of water leaking into the box body.

[0004] The water sealing structure for a raise boring machine according to an embodiment of the utility model includes:

[0005] A box body;

[0006] A main shaft assembly rotatably arranged in the box body in the vertical direction and having its top end extending out of the box body. A vertically penetrating water passing channel is arranged inside the main shaft assembly.

[0007] A water injection member is provided with a water injection channel for communicating with the water passing channel. The water injection member is provided with an embedding part, and the embedding part is embedded in the inner top of the water passing channel and rotatably cooperates with the main shaft assembly coaxially. Two first rotary sealing rings are arranged between the outer peripheral wall of the embedding part and the inner peripheral wall of the water passing channel at intervals in the vertical direction. A pressure oil channel separated from the water injection channel is arranged inside the water injection member. The pressure oil channel forms an oil injection port and an oil outlet on the outer peripheral wall of the water injection member. The oil injection port is located above the main shaft assembly, and the oil outlet is located between the two first rotary sealing rings.

[0008] The water sealing structure for a raise boring machine according to an embodiment of the utility model has at least the following beneficial effects:

[0009] By providing an embedding part within the water passage embedded in the main shaft assembly, and arranging two vertically spaced-apart first rotary seals between the outer peripheral wall of the embedding part and the inner peripheral wall of the water passage, a sealing effect is achieved between the embedding part and the main shaft assembly to prevent the internal cooling water from seeping out from the connection gap between the embedding part and the main shaft assembly to the outer wall of the main shaft assembly, avoiding the cooling water from entering the box body along the outer wall of the main shaft assembly. By providing a pressure oil passage on the water injection part, the pressure oil passage forms an oil injection port above the main shaft assembly and an oil outlet between the two first rotary seals. Thus, an oil injection device with a pressure gauge can be connected to the oil injection port, and pressure oil is injected into the pressure oil passage through the oil injection device, so that the pressure oil fills the pressure oil passage and enters between the two adjacent first rotary seals above and below. If the first rotary seal is damaged, there is a risk of leakage, and after leakage occurs, the pressure monitored by the pressure gauge will become smaller, which can remind the operator to replace the first rotary seal in time, thereby reducing the risk of water leakage into the interior of the box body.

[0010] According to some embodiments of the present invention, an installation part is provided at the top outside of the box body. The installation part has a vertically penetrating central hole, and the top end of the main shaft assembly is rotatably arranged in the central hole. The water injection part is arranged at the upper end of the installation part, and an annular discharge cavity is formed among the water injection part, the installation part and the main shaft assembly. The discharge cavity is located above the main shaft assembly. A discharge passage separated from the water injection passage is provided in the water injection part. One end of the discharge passage communicates with the discharge cavity, and the other end extends to the outer peripheral wall of the water injection part and is used for installing a discharge valve.

[0011] According to some embodiments of the present invention, a first O-ring seal is provided between the lower end surface of the installation part and the upper end surface of the box body.

[0012] According to some embodiments of the present invention, a second rotary seal is provided between the inner peripheral wall at the top of the central hole and the outer peripheral wall of the main shaft assembly. The second rotary seal is used to cooperate with the first rotary seal to seal the lower side of the discharge cavity.

[0013] According to some embodiments of the present invention, the water injection part is horizontally provided with a mating surface, the mating surface is attached to the upper end surface of the installation part, and a second O-ring seal is provided between the mating surface and the upper end surface of the installation part to seal the outer side of the discharge cavity.

[0014] According to some embodiments of the present invention, a mating part protruding from its outer periphery is provided at the upper end of the embedding part. The mating part is used to connect with the installation part, and the mating surface is formed on the lower side of the mating part.

[0015] According to some embodiments of the present utility model, the pressure oil passage includes a first horizontal section, a vertical section, and a second horizontal section. One end of the first horizontal section extends to the outer peripheral wall of the fitting portion to form the oil injection port, and the other end is connected to the upper end of the vertical section. The lower end of the vertical section extends to the lower end surface of the embedding portion and is provided with a plug. One end of the second horizontal section extends to the outer peripheral wall of the embedding portion to form the oil outlet, and the other end communicates with the vertical section.

[0016] According to some embodiments of the present utility model, the main shaft assembly includes a main shaft body and a sealing sleeve coaxially sleeved on the top end of the main shaft body. The sealing sleeve is detachably connected to the main shaft body, and a third O-ring is provided between the inner peripheral wall of the sealing sleeve and the outer peripheral wall of the main shaft body.

[0017] According to some embodiments of the present utility model, the inner peripheral wall of the sealing sleeve is provided with a flange. The flange fits on the upper end surface of the main shaft body and is provided with a connecting member to connect the main shaft body.

[0018] According to some embodiments of the present utility model, the connecting member includes a plurality of screws.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0021] Figure 1 is the installation structure schematic diagram of the water sealing structure for the raise boring machine in the embodiment of the present utility model;

[0022] Figure 2 is Figure 1 the enlarged schematic diagram at A in

[0023] Figure 3 is Figure 1 the enlarged schematic diagram at B in

[0024] Figure 4 is the structure schematic diagram of the joint flange in the embodiment of the present utility model;

[0025] Figure 5 is the explosion schematic diagram of the embodiment of the present utility model.

[0026] Reference Numerals in the Drawings:

[0027] Box body 100;

[0028] Spindle assembly 200, water passage 201, spindle body 210, sealing sleeve 220, flange 221, third O-ring 230;

[0029] Water injection part 300, water injection passage 301, embedding part 302, pressure oil passage 303, first horizontal section 3031, vertical section 3032, second horizontal section 3033, plug 3034, oil injection port 304, oil outlet 305, drainage passage 306, mating part 307, water joint 310, joint flange 320;

[0030] First rotary seal ring 400;

[0031] Mounting part 500, first O-ring 501, second rotary seal ring 502, second O-ring 503, fourth O-ring 504, third rotary seal ring 505, fifth O-ring 506, deep groove ball bearing 510, upper end cover 520, upper pressure cover 530, bearing spacer 540. Detailed implementation mode

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, "a plurality of" means more than two. If there is a description of the first and the second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0036] Refer to Figures 1 to 5 As shown in the figure, a water sealing structure for a raise boring machine according to an embodiment of the present invention includes: a box body 100, a spindle assembly 200, and a water injection part 300.

[0037] The main shaft assembly 200 is distributed along the vertical direction. The main shaft assembly 200 is rotatably arranged in the box body 100 and the top end of the main shaft assembly 200 extends out of the box body 100. A vertically penetrating water passage 201 is arranged inside the main shaft assembly 200.

[0038] The water injection member 300 is provided with a water injection passage 301 for communicating with the water passage 201, and cooling water is injected into the water passage 201 of the main shaft assembly 200 through the water injection member 300; the water injection member 300 is provided with an embedding portion 302, the water injection passage 301 penetrates through the embedding portion 302, the embedding portion 302 is embedded in the inner top side of the water passage 201, and the embedding portion 302 is in coaxial rotational fit with the main shaft assembly 200. In this embodiment, the main shaft assembly 200 is a rotating member and the main shaft assembly 200 can rotate relative to the embedding portion 302; two first rotary sealing rings 400 are arranged at intervals in the vertical direction between the outer peripheral wall of the embedding portion 302 and the inner peripheral wall of the water passage 201 to play a sealing role between the embedding portion 302 and the main shaft assembly 200, preventing the internal cooling water from leaking out of the connection gap between the embedding portion 302 and the main shaft assembly 200 to the outer wall of the main shaft assembly 200 and avoiding the cooling water from entering the box body 100 along the outer wall of the main shaft assembly 200.

[0039] Further, a pressure oil passage 303 separated from the water injection passage 301 is arranged inside the water injection member 300. An oil injection port 304 and an oil outlet 305 are formed on the outer peripheral wall of the water injection member 300 for the pressure oil passage 303. The oil injection port 304 is located above the main shaft assembly 200, and the oil outlet 305 is located between the two first rotary sealing rings 400. In this embodiment, an oil injection device with a pressure gauge can be connected to the oil injection port 304, and pressure oil is injected into the pressure oil passage 303 through the oil injection device, so that the pressure oil fills the pressure oil passage 303 and enters between the two adjacent first rotary sealing rings 400 up and down. If the first rotary sealing ring 400 is damaged, there is a risk of leakage, and after the leakage occurs, the pressure monitored by the pressure gauge will become smaller, which can remind the operator to replace the first rotary sealing ring 400 in time and reduce the risk of water leakage into the box body 100.

[0040] The water sealing structure for a raise borer in an embodiment of the present utility model sets an embedding part 302 embedded in a water passing channel 201 of a main shaft assembly 200, and arranges two first rotary sealing rings 400 vertically spaced on the outer peripheral wall of the embedding part 302 and the inner peripheral wall of the water passing channel 201 to play a sealing role between the embedding part 302 and the main shaft assembly 200, preventing the internal cooling water from seeping out from the connection gap between the embedding part 302 and the main shaft assembly 200 to the outer wall of the main shaft assembly 200, and avoiding the cooling water from entering the box body 100 along the outer wall of the main shaft assembly 200. By setting a pressure oil channel 303 on the water injection part 300, the pressure oil channel 303 forms an oil injection port 304 above the main shaft assembly 200 and an oil outlet 305 between the two first rotary sealing rings 400. Thus, an oil injection device with a pressure gauge can be connected at the oil injection port 304, and pressure oil is injected into the pressure oil channel 303 through the oil injection device, so that the pressure oil fills the pressure oil channel 303 and enters between the two adjacent first rotary sealing rings 400 up and down. If the first rotary sealing ring 400 is damaged, there is a risk of leakage, and the pressure monitored by the pressure gauge will become smaller after leakage, which can remind the operator to replace the first rotary sealing ring 400 in time, thereby reducing the risk of water leakage into the interior of the box body 100.

[0041] In this embodiment, the water injection part 300 includes a water joint 310 and a joint flange 320. The water joint 310 is fixed to the upper end of the joint flange 320. The water joint 310 is used to connect a pipeline for water injection. The embedding part 302 and the pressure oil channel 303 are both arranged on the joint flange 320.

[0042] Refer to Figures 1 to 3 and Figure 5As shown, in some embodiments of the present utility model, a mounting member 500 is provided at the top outside of the box body 100. The mounting member 500 has a vertically penetrating central hole. The top end of the main shaft assembly 200 is rotatably arranged in the central hole. The water injection member 300 is arranged at the upper end of the mounting member 500. An annular discharge cavity is formed among the water injection member 300, the mounting member 500 and the main shaft assembly 200. Specifically, the discharge cavity is located above the main shaft assembly 200 and is a closed cavity formed between the outer wall of the water injection member 300, the inner wall of the mounting member 500 and the upper end surface of the main shaft assembly 200. In addition, a discharge channel 306 is provided in the water injection member 300. The discharge channel 306 is separated from the water injection channel 301 and the pressure oil channel 303. One end of the discharge channel 306 communicates with the discharge cavity, and the other end extends to the outer peripheral wall of the water injection member 300 and can be used for installing a discharge valve. Through the above structural arrangement, when the first rotary seal ring 400 is damaged and the operator fails to replace the first rotary seal ring 400 in time, even if water leaks, it will leak upward into the discharge cavity and be discharged through the discharge channel 306 and the discharge valve, rather than flowing to the outer peripheral wall of the main shaft assembly 200, further reducing the risk of water leaking into the inner wall of the box body 100 and adding an extra layer of protection.

[0043] It can be understood that in order to seal the discharge cavity, a second rotary seal ring 502 is provided between the inner peripheral wall at the top of the central hole of the mounting member 500 and the outer peripheral wall of the main shaft assembly 200. The second rotary seal ring 502 is used to cooperate with the first rotary seal ring 400 to seal the lower side of the discharge cavity. The setting of the second rotary seal ring 502 can prevent water from seeping into the box body 100 along the outer peripheral wall of the main shaft assembly 200 when water leaks. Among them, multiple second rotary seal rings 502 can be arranged at vertical intervals. In addition, the water injection member 300 is horizontally provided with a mating surface. The mating surface is attached to the upper end surface of the mounting member 500. A second O-ring 503 is provided between the mating surface and the upper end surface of the mounting member 500. The second O-ring 503 is used to seal the outer side of the discharge cavity.

[0044] Specifically, in this embodiment, the joint flange 320 is provided with a mating portion 307 protruding from the outer periphery of the embedding portion 302 at the upper end of the embedding portion 302. The mating portion 307 is used to connect with the mounting member 500. By providing the mating portion 307, it is convenient to connect the joint flange 320 with the mounting member 500. Among them, the mating surface is formed on the lower side of the mating portion 307.

[0045] Refer to Figure 2 and Figure 4As shown, in some embodiments of the present utility model, the pressure oil passage 303 includes a first horizontal section 3031, a vertical section 3032, and a second horizontal section 3033. One end of the first horizontal section 3031 extends to the outer peripheral wall of the fitting portion 307 to form an oil injection port 304, and the other end is connected to the upper end of the vertical section 3032. The lower end of the vertical section 3032 extends to the lower end surface of the embedding portion 302 and is provided with a plug 3034. One end of the second horizontal section 3033 extends to the outer peripheral wall of the embedding portion 302 to form an oil outlet 305, and the other end communicates with the vertical section 3032. Through the above arrangement, it is convenient to process the pressure oil passage 303. During processing, a hole can be drilled horizontally from the outer wall of the fitting portion 307 to form the first horizontal section 3031, and a hole can be drilled vertically from the lower end surface of the embedding portion 302 to form the vertical section 3032. Then, a hole is drilled horizontally from the outer peripheral wall of the embedding portion 302 to form the second horizontal section 3033. Finally, the lower end of the vertical section 3032 is blocked with the plug 3034, thus forming the pressure oil passage 303.

[0046] Referring to Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments of the present utility model, the spindle assembly 200 includes a spindle body 210 and a seal sleeve 220 coaxially sleeved on the top end of the spindle body 210. The seal sleeve 220 is detachably connected to the spindle body 210. A third O-ring 230 is provided between the inner peripheral wall of the seal sleeve 220 and the outer peripheral wall of the spindle body 210 to prevent cooling water from leaking out from the connection gap between the seal sleeve 220 and the spindle body 210. In this embodiment, the embedding portion 302 is embedded inside the seal sleeve 220. The first rotary seal ring 400 is provided between the seal sleeve 220 and the embedding portion 302, and the second rotary seal ring 502 is provided between the seal sleeve 220 and the mounting member 500. It can be understood that since the spindle assembly 200 needs to rotate, the fitting portion between it and the embedding portion 302 is prone to wear. When wear occurs, it may be necessary to replace components. Therefore, a detachable seal sleeve 220 is provided to cooperate with the embedding portion 302. Once wear occurs, only the seal sleeve 220 needs to be replaced, and there is no need to replace the entire spindle assembly 200.

[0047] In some specific embodiments, the mounting member 500 includes a deep groove ball bearing 510, an upper end cover 520, an upper gland 530, and a bearing spacer 540. The deep groove ball bearing 510 is sleeved on the main shaft body 210. The upper end cover 520 is sleeved outside the deep groove ball bearing 510 and fixedly connected to the box body 100 for radially positioning the deep groove ball bearing 510. The upper end cover 520 is provided with a lubricating oil passage for injecting oil to lubricate the deep groove ball bearing 510. A first O-ring 501 is provided between the lower end surface of the upper end cover 520 and the upper end surface of the box body 100 to prevent water or dust from entering the gap between the main shaft assembly 200 and the box body 100 along the lower end surface of the mounting member 500 and entering the interior of the box body 100. The upper gland 530 is fixed to the upper end of the upper end cover 520 and sleeved outside the sealing sleeve 220. A part of the upper gland 530 is embedded inside the upper end cover 520, and a fourth O-ring 504 is provided between the upper gland 530 and the inner wall of the upper end cover 520. The upper end cover 520 abuts against the upper end of the outer ring of the deep groove ball bearing 510 to axially position the deep groove ball bearing 510. The second rotary seal ring 502 is located between the upper gland 530 and the sealing sleeve 220, and the second O-ring 503 is located between the upper gland 530 and the joint flange 320. The joint flange 320 is fixed to the upper gland 530. The bearing spacer 540 is sleeved on the main shaft body 210 and located below the deep groove ball bearing 510. A third rotary seal ring 505 is provided between the inner wall of the bearing spacer 540 and the outer wall of the main shaft body 210, and a fifth O-ring 506 is provided between the outer wall of the bearing spacer 540 and the inner wall of the upper end cover 520 to prevent the leakage of lubricating grease.

[0048] Referring to Figure 2 As shown, in some embodiments of the present invention, the inner peripheral wall of the sealing sleeve 220 is provided with a flange 221. The flange 221 fits on the upper end surface of the main shaft body 210 and is provided with connecting members for connecting the main shaft body 210. By providing the flange 221, the connection between the sealing sleeve 220 and the main shaft body 210 is facilitated. Specifically, the connecting members include several screws, which are convenient for disassembly and assembly.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A water sealing structure for a raise boring machine, characterized in that: include: Box (100); A main shaft assembly (200) is rotatably disposed on the box body (100) in a vertical direction and has a top end extending out of the box body (100); a vertically penetrating water passage (201) is provided inside the main shaft assembly (200); The water injection member (300) is provided with a water injection channel (301) for communicating with the water passage (201), and the water injection member (300) is provided with an embedded portion (302), the embedded portion (302) is embedded in the top of the inner side of the water passage (201) and is coaxially rotatably matched with the main shaft assembly (200), and two first rotating seals arranged vertically at intervals are provided between the outer peripheral wall of the embedded portion (302) and the inner peripheral wall of the water passage (201). The water injection member (300) is provided with a pressure oil channel (303) separated from the water injection channel (301), and the pressure oil channel (303) is formed with an oil injection port (304) and an oil outlet (305) on the outer peripheral wall of the water injection member (300), the oil injection port (304) is located on the upper side of the main shaft assembly (200), and the oil outlet (305) is located between the two first rotating seal rings (400).

2. The water sealing structure for a raise boring machine according to claim 1, characterized in that: A mounting member (500) is provided at the top of the outer side of the box body (100), and a vertically penetrating center hole is provided in the mounting member (500). The top end of the main shaft assembly (200) is rotatably arranged in the center hole. The water injection member (300) is arranged at the upper end of the mounting member (500), and an annular drainage cavity is formed between the water injection member (300), the mounting member (500) and the main shaft assembly (200). The drainage cavity is located on the upper side of the main shaft assembly (200). A drainage channel (306) separated from the water injection channel (301) is provided in the water injection member (300), and one end of the drainage channel (306) is connected to the drainage cavity, and the other end extends to the outer peripheral wall of the water injection member (300) and is used for installing a drainage valve.

3. The water sealing structure for a raise boring machine according to claim 2, characterized in that: A first O-type sealing ring (501) is provided between the lower end surface of the mounting member (500) and the upper end surface of the box body (100).

4. The water sealing structure for a raise boring machine according to claim 2, characterized in that: A second rotating seal ring (502) is provided between the inner peripheral wall of the top of the center hole and the outer peripheral wall of the main shaft assembly (200), and the second rotating seal ring (502) is used to cooperate with the first rotating seal ring (400) to seal the lower side of the drainage cavity.

5. The water sealing structure for a raise boring machine according to claim 2, characterized in that: The water injection member (300) is horizontally provided with a mating surface, the mating surface is in contact with the upper end surface of the mounting member (500), and a second O-type sealing ring (503) is provided between the mating surface and the upper end surface of the mounting member (500) to seal the outer peripheral side of the drainage cavity.

6. The water sealing structure for a raise boring machine according to claim 5, characterized in that: The upper end of the embedded portion (302) is provided with a matching portion (307) protruding from its outer circumference, and the matching portion (307) is used to connect with the mounting member (500), and the matching surface is formed on the lower side of the matching portion (307).

7. The water sealing structure for a raise boring machine according to claim 6, characterized in that: The pressure oil channel (303) includes a first horizontal section (3031), a vertical section (3032) and a second horizontal section (3033); one end of the first horizontal section (3031) extends to the outer peripheral wall of the matching portion (307) to form the oil filling port (304), and the other end is connected to the upper end of the vertical section (3032); the lower end of the vertical section (3032) extends to the lower end surface of the embedded portion (302) and is provided with a plug (3034); one end of the second horizontal section (3033) extends to the outer peripheral wall of the embedded portion (302) to form the oil outlet (305), and the other end is connected to the vertical section (3032).

8. The water sealing structure for a raise boring machine according to claim 1, characterized in that: The spindle assembly (200) comprises a spindle body (210) and a sealing sleeve (220) coaxially sleeved on the top end of the spindle body (210); the sealing sleeve (220) is detachably connected to the spindle body (210); and a third O-ring (230) is provided between the inner circumferential wall of the sealing sleeve (220) and the outer circumferential wall of the spindle body (210).

9. The water sealing structure for a raise boring machine according to claim 8, characterized in that: The inner peripheral wall of the sealing sleeve (220) is provided with a flange (221), and the flange (221) is fitted to the upper end surface of the main shaft body (210) and is penetrated by a connecting piece to connect with the main shaft body (210).

10. The water sealing structure for a raise boring machine according to claim 9, characterized in that: The connecting member comprises a plurality of screws.

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