A pressure relief sealing system for a shaft sinking machine

Abstract

The vertical shaft tunneling machine pressure relief sealing system disclosed in the application comprises a wear-resistant ring, an O-shaped ring, a foaming filling part, and a roller mounting seat. The wear-resistant ring is arranged at the first connection position of the end part of the roller. The roller mounting seat is arranged outside the roller and the wear-resistant ring, and the end part of the roller mounting seat is covered to the foaming filling part of the first connection position. The roller mounting seat is arranged in a gap with the wear-resistant ring from the foaming filling part, and forms a second gap. On the roller mounting seat, a bending channel structure, a pressure relief part, a dustproof sealing structure, a first grease filling part, a first lip-shaped sealing structure, a second grease filling part, a second lip-shaped sealing structure, a gear oil filling part, and a third lip-shaped sealing structure are sequentially arranged along the second gap from the foaming filling part. Compared with the prior art, the technical scheme disclosed in the application can solve the problem of large consumption of lubricating grease of the sealing system of the vertical shaft tunneling machine, and can also prolong the service life of the dustproof sealing and the lip-shaped sealing of the vertical shaft tunneling machine.

Description

Technical Field

[0001] This application relates to the field of tunneling machine technology, and more particularly to a pressure relief sealing system for a vertical shaft tunneling machine. Background Technology

[0002] Currently, with the urgent need for underground space engineering construction in my country, various shaft tunneling machines are widely used. As a new type of shaft construction equipment, the sunken shaft tunneling machine has unique technical advantages compared to existing equipment, including safety, high efficiency, small footprint, wide geological adaptability, and minimal impact on the surrounding environment. It is especially suitable for use in large-diameter, deep shaft projects.

[0003] The milling head of a submerged shaft tunneling machine operates in a harsh environment, with slurry pressure reaching up to 10 Bar. Therefore, it requires special sealing protection, and the sealing effect is crucial for the normal operation of internal hydraulic and mechanical components. If the sealing system fails, slurry can enter the hydraulic and mechanical components, causing problems such as poor milling head rotation, abnormal rotational noise, jamming, and even excessive wear and failure of hydraulic and mechanical components.

[0004] In the existing technology, the milling head sealing system mainly involves dust seals, lip seals, lubricating grease, and lubricating oil. In order to prevent external pressure mud and water, the lubricating grease must be injected under pressure, and a large amount of lubricating grease must be consumed, resulting in high costs. It also greatly affects the service life of the dust seal and the lip seal. In other words, the service life of the milling head sealing system involved in the existing technology is relatively low and the cost of use is high.

[0005] Therefore, how to provide a pressure relief sealing system for shaft tunneling machines that can solve the problem of high lubricant consumption in the sealing system of shaft tunneling machines has become a technical goal that urgently needs to be achieved by those skilled in the art. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a pressure relief sealing system for a shaft tunneling machine, which can solve the problem of high lubricant consumption in the sealing system of the shaft tunneling machine. In addition, it can also solve the problem of extending the service life of the dustproof seal and lip seal of the shaft tunneling machine.

[0007] The technical solution provided in this application is as follows:

[0008] This application provides a pressure relief and sealing system for a shaft boring machine, comprising: a wear-resistant ring for covering a wear-resistant ring installed at the end of a drum, the wear-resistant ring being positioned at the end of the drum as a first connection; an O-ring disposed between the wear-resistant ring and the drum; a foam filling portion for filling and sealing the first connection; a drum mounting seat covering the outside of the drum and the wear-resistant ring, the end of the drum mounting seat being sealed to the foam filling portion of the first connection; wherein, the drum mounting seat is spaced apart from the wear-resistant ring from the foam filling portion to form a second gap; on the drum mounting seat, along the second gap from the foam filling portion, a bent channel structure, a pressure relief portion, a dustproof sealing structure, a first grease filling portion, a first lip seal structure, a second grease filling portion, a second lip seal structure, a gear oil filling portion, and a third lip seal structure are sequentially arranged.

[0009] Furthermore, in a preferred embodiment of the invention, the wear-resistant ring is mounted on the roller by screws and a flat washer.

[0010] Furthermore, in a preferred embodiment of the present invention, the pressure relief section includes: a pressure relief cavity communicating with the bent channel structure; and a pressure relief channel communicating with the pressure relief cavity.

[0011] Furthermore, in a preferred embodiment of the present invention, it further includes: a stirring rod installed and connected to the wear-resistant ring, the stirring rod being used to sweep and push the mud in the pressure relief chamber.

[0012] Furthermore, in a preferred embodiment of the present invention, a pressure sensor is further included, which is mounted on the pressure relief chamber.

[0013] Furthermore, in a preferred embodiment of the present invention, the first lip seal structure, the second lip seal structure, and the third lip seal structure are all lip seals that are pressed and installed on the roller mounting base by the first sealing plate and the second sealing plate.

[0014] Furthermore, in a preferred embodiment of the invention, the roller is provided with an O-ring mounting groove for accommodating the O-ring.

[0015] Furthermore, in a preferred embodiment of the present invention, the first grease filling part includes a first grease filling channel; and a first grease filling cavity communicating with the first grease filling channel, the two ends of the first grease filling cavity being sealed by the dustproof sealing structure and the first lip sealing structure.

[0016] Furthermore, in a preferred embodiment of the present invention, the second grease filling part includes: a second grease filling channel; a second grease filling cavity communicating with the second grease filling channel; the second grease filling cavity is sealed by the first lip sealing structure and the second lip sealing structure.

[0017] Furthermore, in a preferred embodiment of the present invention, the gear oil filling part includes: a gear oil filling channel; a gear oil cavity connected to the gear oil filling channel; the gear oil cavity is sealed by the second lip sealing structure and the third lip sealing structure.

[0018] This invention provides a pressure relief and sealing system for a vertical shaft tunneling machine, which, compared with existing technologies, includes: a wear-resistant ring for covering a wear-resistant ring installed at the end of a drum, the wear-resistant ring being positioned at a first connection point at the end of the drum; an O-ring disposed between the wear-resistant ring and the drum; a foam filling portion for filling and sealing the first connection point; a drum mounting seat covering the outside of the drum and the wear-resistant ring, the end of the drum mounting seat sealing the foam filling portion at the first connection point; wherein, the drum mounting seat is spaced apart from the wear-resistant ring from the foam filling portion. A second gap is formed; on the drum mounting base, along the second gap starting from the foam filling part, a bent channel structure, a pressure relief part, a dustproof sealing structure, a first grease filling part, a first lip seal structure, a second grease filling part, a second lip seal structure, a gear oil filling part, and a third lip seal structure are sequentially arranged. Compared with the prior art, the technical solution involved in this invention can solve the problem of large consumption of lubricating grease in the sealing system of shaft tunneling machines. In addition, it can also solve the problem of extending the service life of the dustproof seal and lip seal of shaft tunneling machines. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A cross-sectional view of the pressure relief sealing system for a shaft boring machine provided in an embodiment of the present invention. Figure 1 .

[0021] Figure 2 A cross-sectional view of the pressure relief sealing system for a shaft boring machine provided in an embodiment of the present invention. Figure 2 .

[0022] Figure 3 This is a right view of the milling head in the background environment of the use of the pressure relief sealing system of the shaft tunneling machine according to an embodiment of the present invention.

[0023] Figure 4 This is a front view of the milling head in the background environment of the use of the pressure relief sealing system of the shaft tunneling machine according to an embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "first", "second", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0028] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0029] like Figures 1 to 4As shown in the embodiment of this application, the pressure relief and sealing system for a shaft boring machine includes: a wear-resistant ring 3 for covering the end of a drum 1, wherein the position of the wear-resistant ring 3 covering the end of the drum 1 is a first connection; an O-ring 4 disposed between the wear-resistant ring 3 and the drum 1; a foam filling part for filling and sealing the first connection; a drum mounting seat 2 covering the outside of the drum 1 and the wear-resistant ring 3, wherein the end of the drum mounting seat 2 is sealed to the foam filling part of the first connection; wherein, the drum mounting seat 2 is spaced apart from the wear-resistant ring 3 from the foam filling part to form a second gap; on the drum mounting seat 2, along the second gap from the foam filling part, a bent channel structure 13, a pressure relief part, a dustproof sealing structure 5, a first grease filling part, a first lip seal structure 601, a second grease filling part, a second lip seal structure 602, a gear oil filling part, and a third lip seal structure 603 are sequentially disposed.

[0030] This invention provides a pressure relief and sealing system for a vertical shaft tunneling machine, specifically comprising: a wear-resistant ring 3 for covering an end of a drum 1, the wear-resistant ring 3 covering the end of the drum 1 at a first connection point; an O-ring 4 disposed between the wear-resistant ring 3 and the drum 1; a foam filling portion for filling and sealing the first connection point; a drum mounting seat 2 covering the outside of the drum 1 and the wear-resistant ring 3, the end of the drum mounting seat 2 sealing the foam filling portion of the first connection point; wherein, the drum mounting seat 2 is spaced apart from the wear-resistant ring 3 from the foam filling portion to form a second gap; on the drum mounting seat 2, along the second gap from the foam filling portion, a bent channel structure 13, a pressure relief portion, a dustproof sealing structure 5, a first grease filling portion, a first lip seal structure 601, a second grease filling portion, a second lip seal structure 602, a gear oil filling portion, and a third lip seal structure 603 are sequentially arranged. In this embodiment of the invention, the slurry pressure in the working environment of the milling head is P0, which can reach up to 10 Bar. The slurry, passing through the foamed sealing filler 10 and the bent channel structure 13, experiences pressure reduction to P1 before reaching the pressure relief chamber 14. Pressure is then released through the pressure relief channel 15, reducing the slurry pressure to or near its natural pressure P2. The pressure relief channel 15 is connected to a pressure relief pump or to the slurry pump of the shaft boring machine's slurry circulation system. Since the pressure P2 of the slurry reaching the dust seal is much lower than P0, the grease injection pressure P3 of the first grease injection channel 17 is lower than the grease injection pressure of other sealing systems. Many, P3 = P2 + 0.2 Bar, where 0.2 Bar is the dust seal pressure, thus the grease filling pressure P4 of the second grease filling channel 19 is much lower than the grease filling pressure of other sealing systems. P4 = P3 + 0.3 Bar, where 0.3 Bar is the lip seal pressure. Gear oil is filled into the gear oil filling channel 21 in its natural state, with internal circulation of the gear oil. Compared with existing technologies, this can solve the problem of high lubricant consumption in the sealing system of shaft boring machines. In addition, it can also solve the problem of extending the service life of dust seals and lip seals in shaft boring machines.

[0031] Specifically, in an embodiment of the present invention, the wear-resistant ring 3 is mounted on the roller 1 by screws 11 and flat washers 12.

[0032] Specifically, in an embodiment of the present invention, the pressure relief part includes: a pressure relief cavity 14 communicating with the bent channel structure 13; and a pressure relief channel 15 communicating with the pressure relief cavity 14.

[0033] Specifically, in an embodiment of the present invention, it further includes: a stirring rod 9 installed and connected to the wear-resistant ring 3, the stirring rod 9 being used to sweep and push the mud in the pressure relief chamber 14.

[0034] Specifically, in an embodiment of the present invention, a pressure sensor is further included, which is mounted on the pressure relief chamber 14.

[0035] Specifically, in the embodiments of the present invention, the first lip seal structure 601, the second lip seal structure 602, and the third lip seal structure 603 are all lip seals 6 that are pressed and installed on the roller mounting base 2 by the first sealing pressure plate 7 and the second sealing pressure plate 8.

[0036] Specifically, in an embodiment of the present invention, the roller 1 is provided with an O-ring mounting groove for accommodating the O-ring 4.

[0037] Specifically, in an embodiment of the present invention, the first grease filling part includes a first grease filling channel 17; a first grease filling cavity 16 communicating with the first grease filling channel 17, and the two ends of the first grease filling cavity 16 are sealed by the dustproof sealing structure 5 and the first lip sealing structure 601.

[0038] Specifically, in an embodiment of the present invention, the second grease filling part includes: a second grease filling channel 19; a second grease filling cavity 18 communicating with the second grease filling channel; the second grease filling cavity 18 is sealed by the first lip sealing structure 601 and the second lip sealing structure 602.

[0039] Specifically, in an embodiment of the present invention, the gear oil filling part includes: a gear oil filling channel 21; a gear oil cavity 20 connected to the gear oil filling channel; the gear oil cavity 20 is sealed by the second lip seal structure 602 and the third lip seal structure 603.

[0040] To elaborate further, with the urgent need for underground space engineering construction in my country, various shaft tunneling machines are now widely used. As a new type of shaft construction equipment, the sunken shaft tunneling machine has unique technical advantages compared to existing equipment, including safety, high efficiency, small footprint, wide geological adaptability, and minimal impact on the surrounding environment. It is particularly suitable for use in large-diameter, deep shaft projects.

[0041] The milling head of a submerged shaft tunneling machine operates in a harsh environment, with slurry pressure reaching 10 BAR. Therefore, it requires special sealing protection, and the sealing effect is crucial for the normal operation of internal hydraulic and mechanical components. If the sealing system fails, slurry can enter the hydraulic and mechanical components, causing problems such as poor milling head rotation, abnormal rotational noise, jamming, and even excessive wear and failure of hydraulic and mechanical components.

[0042] In the existing technology, the milling head sealing system mainly involves dust seals, lip seals, lubricating grease, and lubricating oil. In order to prevent external pressure mud and water, the lubricating grease must be injected under pressure, and a large amount of lubricating grease must be consumed, resulting in high costs. It also greatly affects the service life of the dust seal and the lip seal. In other words, the service life of the milling head sealing system involved in the existing technology is relatively low and the cost of use is high.

[0043] The technical solutions involved in the embodiments of the present invention can solve the problem of high consumption of lubricating grease in the sealing system of shaft tunneling machines. In addition, they can also solve the problem of extending the service life of dustproof seals and lip seals of shaft tunneling machines.

[0044] according to Figure 1 , Figure 2 As shown, the pressure relief sealing system involved in the embodiment of the present invention is mainly installed between the roller 1 and the roller mounting base 2, including: wear-resistant ring 3, O-ring 4, dustproof seal 5, lip seal, first lip seal pressure plate 17, second lip seal pressure plate 8, stirring rod 9 and foamed sealant 10.

[0045] The wear-resistant ring 3 is installed and connected to the drum 1 by screws 11 and flat washers 12, the stirring rod 9 is installed and connected to the wear-resistant ring 3, and the O-ring 4 is installed in the O-ring groove and pressed by the wear-resistant ring 3.

[0046] Dustproof seal 5 is installed on roller mounting base 2, and lip seal 6 is installed on roller mounting base 2, and is pressed by lip seal pressure plate 17 and lip seal pressure plate 28.

[0047] Among them, the foamed sealing filler 10 can effectively prevent mud and sand from entering the sealing channel to form the first seal of the pressure relief sealing system. The bent channel structure 13 is the second seal of the pressure relief sealing system. The pressure relief chamber 14 and the pressure relief channel 15 form the third seal of the pressure relief sealing system. The pressure relief chamber 14 is equipped with a pressure sensor. The stirring rod 9 can effectively prevent mud and water from forming mud cake in the pressure relief chamber 14. The dustproof seal 5 and the first grease chamber 16 are filled with grease to form the fourth seal of the pressure relief sealing system. The first lip seal 6 and the second grease chamber 18 are filled with grease to form the fifth seal of the pressure relief sealing system. The second lip seal 6 is the sixth seal of the pressure relief sealing system. The gear oil chamber 20 is filled with gear oil to lubricate the sealing device and cool it down. The third lip seal 6 is the seventh seal of the pressure relief sealing system.

[0048] It should be noted that the mud and water pressure in the working environment of the milling head is P0, which can reach up to 10 BAR. The mud and water pressure decreases to P1 after passing through the foamed sealing filler 10 and the bent channel structure 13, and reaches the pressure relief chamber 14. The pressure is then released through the pressure relief channel 15, reducing the mud and water pressure to or close to the natural pressure P2. The pressure relief channel 15 is connected to the pressure relief pump or to the slurry pump of the mud and water circulation system of the shaft boring machine. The pressure P2 of the mud and water reaching the dust seal is much less than P0. Therefore, the grease filling pressure P3 of the first grease filling channel 17 is much lower than the grease filling pressure of other sealing systems. P3 = P2 + 0.2 BAR, where 0.2 BAR is the dust seal passage pressure. Consequently, the grease filling pressure P4 of the second grease filling channel 19 is much lower than the grease filling pressure of other sealing systems. P4 = P3 + 0.3 BAR, where 0.3 BAR is the lip seal passage pressure. Gear oil is filled through the gear oil filling channel 21 in the natural state, and the gear oil circulates internally.

[0049] This invention provides a novel design structure for a pressure relief sealing system for a vertical shaft boring machine. By adding foamed sealing filler, a bent channel structure, and pressure relief chambers and channels, the pressure of the mud and water reaching the dust seal is reduced to or close to the natural pressure. This reduces the grease injection pressure and consumption, solving the problem of high lubricant consumption in the sealing system of the milling head operating in high-pressure mud and water environments. Simultaneously, the reduced operating pressure of the dust seal and lip seal effectively extends their service life, thus extending the service life of the dust seal and lip seal in high-pressure mud and water environments and reducing costs. Compared to existing technologies, this invention offers significant technical advantages.

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

Claims

1. A pressure relief sealing system for a shaft boring machine, characterized in that, include: The wear-resistant ring (3) is used to cover the end of the roller (1), and the position where the wear-resistant ring (3) covers the end of the roller (1) is the first connection point; An O-ring (4) is disposed between the wear-resistant ring (3) and the roller (1); The foam filling portion is used to fill and seal the first connection. The roller mounting base (2) covers the outside of the roller (1) and the wear-resistant ring (3), and the end of the roller mounting base (2) is sealed to the foam filling part of the first connection; The roller mounting base (2) is positioned with a gap from the foam filling part to form a second gap with the wear-resistant ring (3); On the roller mounting base (2), along the second gap starting from the foam filling part, a bent channel structure (13), a pressure relief part, a dustproof sealing structure (5), a first grease filling part, a first lip seal structure (601), a second grease filling part, a second lip seal structure (602), a gear oil filling part, and a third lip seal structure (603) are arranged in sequence.

2. The pressure relief sealing system for a shaft boring machine according to claim 1, characterized in that, The wear-resistant ring (3) is mounted on the roller (1) by screws (11) and flat washers (12).

3. The pressure relief sealing system for a shaft boring machine according to claim 1, characterized in that, The pressure relief section includes: a pressure relief cavity (14) communicating with the bent channel structure (13); A pressure relief channel (15) connected to the pressure relief chamber (14).

4. The pressure relief sealing system for a shaft boring machine according to claim 3, characterized in that, Also includes: A stirring rod (9) is installed on the wear-resistant ring (3) and is used to scrape and push the mud in the pressure relief chamber (14).

5. The pressure relief sealing system for a shaft boring machine according to claim 4, characterized in that, Also includes: The pressure sensor is installed on the pressure relief chamber (14).

6. The pressure relief sealing system for a shaft boring machine according to claim 1, characterized in that, The first lip seal structure (601), the second lip seal structure (602), and the third lip seal structure (603) are all lip seals (6) that are pressed and installed on the roller mounting base (2) by the first sealing plate (7) and the second sealing plate (8).

7. The pressure relief sealing system for a shaft boring machine according to claim 1, characterized in that, The roller (1) is provided with an O-ring mounting groove for accommodating the O-ring (4).

8. The pressure relief sealing system for a shaft boring machine according to any one of claims 1 to 7, characterized in that, The first grease filling part includes a first grease filling channel (17); and a first grease filling cavity (16) communicating with the first grease filling channel (17), the two ends of the first grease filling cavity (16) being sealed by the dustproof sealing structure (5) and the first lip sealing structure (601).

9. The pressure relief sealing system for a shaft boring machine according to any one of claims 1 to 7, characterized in that, The second grease filling part includes: a second grease filling channel (19); a second grease filling cavity (18) communicating with the second grease filling channel; the second grease filling cavity (18) is sealed by the first lip sealing structure (601) and the second lip sealing structure (602).

10. The shaft boring machine pressure relief sealing system according to any one of claims 1 to 7, characterized in that, The gear oil filling part includes: a gear oil filling channel (21); a gear oil cavity (20) connected to the gear oil filling channel; the gear oil cavity (20) is sealed by the second lip seal structure (602) and the third lip seal structure (603).

Images