Multi-point sealing grease injection structure for shield tail sealing

Abstract

The utility model discloses a multipoint sealing grease injection structure for shield tail sealing, which relates to the technical field of shield tunneling machines and comprises a machine body, a grease front cavity and a grease rear cavity are sequentially arranged at the tail end of the machine body, and shield tail brushes are fixedly mounted in the grease front cavity and the grease rear cavity. A short grease injection pipe and a long grease injection pipe are arranged on the inner side of the machine body, grease injection ring pipes are fixedly installed in the grease front cavity and the grease rear cavity, and buffer assemblies are arranged in the grease injection ring pipes. According to the technical scheme, the grease front cavity, the grease rear cavity and the grease injection annular pipe are arranged, specifically, the two annular cavities are additionally arranged at the tail, the number and distribution of grease injection openings are increased, the uniform grease injection effect and the sealing effect are improved, the sealing life is prolonged, and the working efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, in particular to a multi-point sealing grease injection structure for shield tail sealing. Background Art

[0002] The shield machine is a mechanical device used for underground tunnel excavation. It completes the tunnel excavation by advancing underground and supporting the surrounding soil layer at the same time. During the operation of the shield machine, in order to prevent groundwater and mud from entering the tunnel, the shield tail needs to be sealed. The shield tail sealing technology is a very important part of the shield machine project. It is mainly used to prevent groundwater and mud from entering the tunnel, while also reducing ground subsidence and protecting the surrounding environment. The shield tail seal of the shield machine is usually affected by factors such as groundwater pressure, soil stability, and construction environment.

[0003] The common problem of the shield tail seal of the shield machine is that the grease injection is uneven due to the limited number of injection holes, and the sealing effect is difficult to guarantee. Uneven grease injection of the tail shield of the shield machine may lead to unstable operation of the shield machine: Uneven grease injection of the tail shield will cause the tail shield to bear uneven force during the advancement process, thereby affecting the operation stability of the shield machine, and may even cause vibration and noise problems; Decreased sealing effect: Uneven grease injection of the tail shield will lead to unsatisfactory sealing effect, and groundwater and mud may enter the tunnel through the gap of the tail shield, affecting the construction environment and work efficiency; Shortened equipment life: Uneven force and vibration caused by uneven grease injection of the tail shield may accelerate the wear of shield machine components, shorten the service life of the equipment, and increase maintenance costs; Safety hazards: Uneven grease injection of the tail shield may lead to unstable equipment operation, increase safety hazards during the construction of the shield machine, and may even cause serious accidents. Therefore, ensuring uniform grease injection of the tail shield is a very important part of shield machine construction, which helps to ensure the stable operation of the equipment, improve the sealing effect, extend the life of the equipment and reduce safety risks. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a multi-point sealing grease injection structure for shield tail sealing, so as to solve the problem that uneven grease injection of the tail shield in the prior art may lead to unstable operation of the equipment, increase the safety hazards in the construction process of the shield machine, and may even cause serious accidents. Therefore, ensuring uniform grease injection of the tail shield is a very important part of the construction of the shield machine, which helps to ensure the stable operation of the equipment, improve the sealing effect, extend the life of the equipment and reduce safety risks.

[0005] In view of this, the utility model provides a multi-point sealing grease injection structure for shield tail sealing, including a body, wherein a grease front chamber and a grease rear chamber are sequentially arranged at the rear end of the body, shield tail brushes are fixedly installed inside the grease front chamber and the grease rear chamber, a short grease injection tube and a long grease injection tube are respectively arranged on the inside of the body, grease ring tubes are fixedly installed inside the grease front chamber and the grease rear chamber, and a buffer component is arranged inside the grease ring tube.

[0006] Optionally, the grease injection ring tube is provided with a plurality of grease outlets around its periphery.

[0007] Optionally, the long grease injection tube, the short grease injection tube and the grease injection ring tube are connected by welding.

[0008] Optionally, the buffer assembly includes a buffer ring tube, a support block and a plurality of grease outlet holes, the buffer ring tube is suspended inside the grease injection ring tube, the support block is fixedly connected between the outer wall of the buffer ring tube and the inner wall of the grease injection ring tube, and the plurality of grease outlet holes are opened on the side wall of the buffer ring tube.

[0009] Optionally, the buffer ring tube is fixedly installed inside the grease injection ring tube by means of a support block, and a plurality of grease outlet holes are arranged in a circular array on one side of the buffer ring tube.

[0010] Optionally, one end of the short grease injection tube is connected to the interior of the buffer ring tube located inside the grease front cavity.

[0011] Optionally, one end of the long grease injection tube is connected to the interior of the buffer ring tube located inside the grease rear cavity.

[0012] It can be seen from the above technical solutions that the embodiments of the utility model have the following advantages:

[0013] 1. The utility model discloses a multi-point sealing grease injection structure for shield tail sealing, which is provided with a grease front chamber, a grease rear chamber and a grease injection ring tube. Specifically, two annular chambers are added at the tail, and the number and distribution of grease injection ports are increased, which can significantly improve the grease injection effect, make the grease injection more uniform, improve the sealing performance of the shield tail, achieve more uniform sealing grease injection, ensure that each sealing part can get sufficient lubrication and sealing effect, improve the reliability of the shield tail seal, better cover the shield tail sealing part, increase the lubrication and filling of the sealing grease, improve the sealing effect, reduce the risk of leakage, and uniform grease injection can reduce the wear and damage of the sealing parts, extend the sealing life, reduce maintenance costs and downtime, improve the grease injection effect can reduce the frequency of shield tail sealing failures, reduce the time for maintenance and replacement of sealing parts, and improve the working efficiency of the shield machine. Better sealing effect can reduce the leakage risk in the shield tail area, reduce the leakage of lubricating grease, and improve the safety of the construction site.

[0014] 2. The utility model is a multi-point sealing grease injection structure for shield tail sealing. A buffer component is set. Specifically, when the short grease injection tube and the long grease injection tube transport grease into the grease injection ring tube, the grease is first transported to the buffer ring tube, and then discharged into the grease injection ring tube through the grease outlet hole, so that the grease is more evenly injected into the grease injection ring tube, further improving the uniformity of grease injection.

[0015] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 This is the layout diagram of the short grease injection pipe of the tail shield of the utility model shield machine;

[0018] Figure 2 This is the layout diagram of the grease injection pipe of the tail shield of the utility model shield machine;

[0019] Figure 3 This is a partial sectional view of the side of the grease-injected ring tube of the utility model;

[0020] Figure 4 For this utility model Figure 3 A partial enlarged view of point A in the middle.

[0021] Explanation of the reference numerals: 1. machine body; 2. grease front chamber; 3. grease rear chamber; 4. shield tail brush; 5. short grease injection tube; 6. long grease injection tube; 7. grease injection ring tube; 801. buffer ring tube; 802. support block; 803. grease outlet hole. DETAILED DESCRIPTION

[0022] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0023] A multi-point sealing grease injection structure for shield tail sealing according to an embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] For easier understanding, see Figures 1 to 4The utility model provides an embodiment of a multi-point sealing grease injection structure for shield tail sealing, comprising a body 1, a grease front chamber 2 and a grease rear chamber 3 are sequentially arranged at the rear end of the body 1, a shield tail brush 4 is fixedly installed inside the grease front chamber 2 and the grease rear chamber 3, a short grease injection tube 5 and a long grease injection tube 6 are respectively arranged on the inner side of the body 1, a grease injection ring tube 7 is fixedly installed inside the grease front chamber 2 and the grease rear chamber 3, a buffer component is arranged inside the grease injection ring tube 7, a plurality of grease outlets are opened around the grease injection ring tube 7, and the long grease injection tube 6 and the short grease injection tube 5 are connected to the grease injection ring tube 7 by welding.

[0026] It should be noted that, by setting up the grease front chamber 2, the grease rear chamber 3, the short grease injection tube 5, the long grease injection tube 6 and the grease injection ring tube 7, the original 20-way shield tail grease injection pipelines are connected by two annular steel pipes with a diameter of ф25 in each group of 10, and then 30 grease outlets are evenly distributed on the grease injection ring tube 7. After this transformation, the original 20-way shield tail grease pipeline can be optimized to 60, which greatly increases the number of injection ports, can significantly improve the grease injection effect, make the grease injection more uniform, improve the shield tail sealing performance, achieve more uniform sealing grease injection, ensure that each sealing part can be fully lubricated and sealed, improve the reliability of the shield tail seal, better cover the shield tail sealing part, increase the lubrication and filling of the sealing grease, improve the sealing effect, and reduce the risk of leakage. Improve the sealing life: Uniform grease injection can reduce the wear and damage of the sealing parts, extend the sealing life, and reduce maintenance costs and downtime. Improve work efficiency: Improving the grease injection effect can reduce the frequency of shield tail seal failures, reduce the time for maintenance and replacement of sealing components, and improve the work efficiency of the shield machine. Improve safety: Better sealing effect can reduce the risk of leakage in the shield tail area, reduce the leakage of lubricating grease, and improve the safety of the construction site.

[0027] Example 2

[0028] In some embodiments, Figure 3 , Figure 4 As shown, the buffer assembly includes a buffer ring tube 801, a support block 802 and a plurality of grease outlet holes 803. The buffer ring tube 801 is suspended inside the grease injection ring tube 7. The support block 802 is fixedly connected between the outer wall of the buffer ring tube 801 and the inner wall of the grease injection ring tube 7. The plurality of grease outlet holes 803 are opened on the side wall of the buffer ring tube 801. The buffer ring tube 801 is fixedly installed inside the grease injection ring tube 7 by the setting of the support block 802. The plurality of grease outlet holes 803 are arranged in a circular array on one side of the buffer ring tube 801. One end of the short grease injection tube 5 is connected to the interior of the grease injection ring tube 7 located inside the grease front cavity 2. One end of the long grease injection tube 6 is connected to the interior of the grease injection ring tube 7 located inside the grease rear cavity 3.

[0029] It should be noted that, by providing a buffer ring tube 801, the buffer ring tube 801 is connected to the short grease injection tube 5 and the long grease injection tube 6. When the short grease injection tube 5 and the long grease injection tube 6 transport grease into the grease injection ring tube 7, the grease is first transported to the buffer ring tube 801, and then discharged into the grease injection ring tube 7 through the grease outlet 803, so that the grease is more evenly injected into the grease injection ring tube 7, further improving the uniformity of grease injection.

[0030] Working principle: By setting up the grease front chamber 2, the grease rear chamber 3, the short grease injection tube 5, the long grease injection tube 6 and the grease injection ring tube 7, the original 20 shield tail grease injection pipelines are connected by two annular steel pipes with a diameter of ф25 in each group of 10, and then 30 grease outlets are evenly distributed on the grease injection ring tube 7. After this transformation, the original 20 shield tail grease pipelines can be optimized to 60, and when the short grease injection tube 5 and the long grease injection tube 6 transport grease to the grease injection ring tube 7, the grease is first transported to the buffer ring tube 801, and then discharged into the grease outlet hole 803. To the inside of the grease injection ring tube 7, the grease is more evenly injected into the grease injection ring tube 7, and then the grease is sealed by the grease outlet opened by the grease injection ring tube 7, which greatly increases the number of injection ports, can significantly improve the grease injection effect, make the grease injection more even, improve the shield tail sealing performance, achieve more even sealing grease injection, ensure that each sealing part can get sufficient lubrication and sealing effect, improve the reliability of the shield tail seal, can better cover the shield tail sealing part, increase the lubrication and filling of the sealing grease, improve the sealing effect, and reduce the risk of leakage. Improve the sealing life: Uniform grease injection can reduce the wear and damage of the sealing parts, extend the sealing life, and reduce maintenance costs and downtime. Improve work efficiency: Improving the grease injection effect can reduce the frequency of shield tail seal failures, reduce the time for maintenance and replacement of sealing parts, and improve the work efficiency of the shield machine. Improve safety: Better sealing effect can reduce the risk of leakage in the shield tail area, reduce the leakage of lubricating grease, and improve the safety of the construction site.

[0031] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-point sealing grease injection structure for shield tail sealing, characterized in that: The invention comprises a machine body (1), wherein a grease front chamber (2) and a grease rear chamber (3) are sequentially arranged at the rear end of the machine body (1), a shield tail brush (4) is fixedly installed inside the grease front chamber (2) and the grease rear chamber (3), a short grease injection tube (5) and a long grease injection tube (6) are respectively arranged on the inner side of the machine body (1), a grease injection ring tube (7) is fixedly installed inside the grease front chamber (2) and the grease rear chamber (3), and a buffer component is arranged inside the grease injection ring tube (7).

2. A multi-point sealing grease injection structure for shield tail sealing according to claim 1, characterized in that: The grease injection ring tube (7) is provided with a plurality of grease outlets around its periphery.

3. The multi-point sealing grease injection structure for shield tail sealing according to claim 1, characterized in that: The long grease injection tube (6) and the short grease injection tube (5) are connected to the grease injection ring tube (7) by welding.

4. The multi-point sealing grease injection structure for shield tail sealing according to claim 1, characterized in that: The buffer assembly comprises a buffer ring tube (801), a support block (802) and a plurality of grease outlet holes (803); the buffer ring tube (801) is suspended inside the grease injection ring tube (7); the support block (802) is fixedly connected between the outer wall of the buffer ring tube (801) and the inner wall of the grease injection ring tube (7); and the plurality of grease outlet holes (803) are provided on the side wall of the buffer ring tube (801).

5. A multi-point sealing grease injection structure for shield tail sealing according to claim 4, characterized in that: The buffer ring tube (801) is fixedly mounted inside the grease injection ring tube (7) by means of a support block (802), and a plurality of grease outlet holes (803) are arranged in a circular array on one side of the buffer ring tube (801).

6. The multi-point sealing grease injection structure for shield tail sealing according to claim 1, characterized in that: One end of the short grease injection tube (5) is connected to the interior of the buffer ring tube (801) located inside the grease front chamber (2).

7. A multi-point sealing grease injection structure for shield tail sealing according to claim 6, characterized in that: One end of the long grease injection tube (6) is in communication with the interior of the buffer ring tube (801) located inside the grease rear cavity (3).

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