Shield sealing seat sealing system

Abstract

The invention relates to the technical field of shield tunneling machines, and the shield tunneling machine sealing device comprises a sealing assembly, a sealing plate, a driving part and an isolation body, and the sealing plate is composed of an upper sealing plate and a lower sealing plate; the upper sealing plate and the lower sealing plate are respectively connected with the driving piece; the sealing system comprises a plurality of sealing assemblies, the isolation body comprises a front isolation body and a rear isolation body, the sealing assemblies are fixed to the front isolation body and the rear isolation body respectively, and each sealing assembly is composed of filler, a D seal, an X seal, a C seal and a middle L seal; a first area, a second area, a third area, a fourth area and a fifth area are formed by the multiple sealing assemblies, the fifth area comprises the third area and the fourth area, and the first area and the second area are located on the two sides of the fifth area correspondingly; by means of the sealing seat, medium gushing and slurry leakage can be blocked under the high pressure difference of the sealing seat, and the safety in the cutting tool replacing process is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield tunneling machine, and particularly relates to a shield sealing seat sealing system. BACKGROUND

[0002] With the orderly promotion of domestic and foreign infrastructure in recent years, the shield tunneling machine, as a kind of king of special engineering machinery for tunneling, has been widely used in multiple tunnel projects crossing rivers and seas. At present, in the process of tunneling in high water pressure stratum with high water content, the operating personnel often face the risk of sealing system grouting and grouting leakage when replacing the cutting tool under pressure, and even more, the pressure is unstable, the tunnel face collapses, which greatly affects the smooth progress of construction, and a large amount of manpower, material resources and financial resources are wasted, and the loss is immeasurable.

[0003] However, the traditional sealing system is a single sealing structure, which is difficult to meet the high pressure sealing requirement in the process of shield tunneling. Therefore, it is of great significance to design a shield sealing seat sealing system to realize the operation under high pressure difference. SUMMARY

[0004] In view of the above problems, the present application provides a shield sealing seat sealing system, which can block the medium gushing and grouting leakage under high pressure difference of the sealing seat, greatly improving the safety of the cutting tool replacement process.

[0005] To solve the above problems, the technical scheme adopted by the present application is:

[0006] A shield sealing seat sealing system, comprising a sealing assembly, a sealing plate, a driving member, and an isolation body, the sealing plate is composed of an upper sealing plate and a lower sealing plate; the upper sealing plate and the lower sealing plate are respectively connected with the driving member; the sealing system comprises a plurality of sealing assemblies, the isolation body comprises a front isolation body and a rear isolation body, the sealing assemblies are respectively fixed on the front isolation body and the rear isolation body, and the sealing assembly is composed of a filler, a D sealing, an X sealing, a C sealing, and a middle L sealing; wherein the D sealing and the C sealing are fixed in the rear isolation body slot, the middle L sealing is fixed in the upper sealing plate slot, the filler is placed in the slot formed by the combination of the front isolation body and the rear isolation body, and the X sealing is placed in the fixed slot on the front isolation body and the rear isolation body; the plurality of sealing assemblies form a first area, a second area, a third area, a fourth area, and a fifth area, the fifth area includes the third area and the fourth area, and the first area and the second area are respectively located on both sides of the fifth area.

[0007] Preferably, the first area and the second area are provided with front filler, rear filler, left filler, and right filler, and the combination is placed in the slot formed by the combination of the front isolation body and the rear isolation body.

[0008] Preferably, the front filler, rear filler, left filler and right filler are in the shape of an isosceles triangle combined with a trapezoid in cross section, the fillers are long strips, wrapped with the upper sealing plate or the lower sealing plate, and further comprising a pressing plate, and the upper part of the filler is pressed by the pressing plate.

[0009] Preferably, a dustproof plate is arranged on the pressing plate, and the dustproof plate is formed by vulcanization of an alloy plate and rubber.

[0010] Preferably, the third region and the fourth region are provided with front X seals, rear X seals, left D seals and right D seals, respectively, and the front X seals are arranged on the front spacer, and the rear X seals, the left D seals and the right D seals are arranged on the rear spacer.

[0011] Preferably, the length of the front X seal is less than the length of the rear X seal, and the length of the front X seal is greater than the width of the upper sealing plate; the left D seal and the right D seal are respectively pressed on the front X seal and the rear X seal, and the upper sealing plate and the third region are respectively fixed with the front spacer and the rear spacer.

[0012] Preferably, the fifth region further comprises a middle L seal, left C seals, right C seals, left upper lubrication, left lower lubrication, right upper lubrication, right lower lubrication and a front O seal, the middle L seal is arranged in the upper sealing plate slot, the left C seals and the right C seals are arranged on the rear spacer, the left upper lubrication, the left lower lubrication, the right upper lubrication and the right lower lubrication are machined on the front spacer, and the front O seal is fixed on the front spacer.

[0013] Preferably, the middle L seal is fixed on the upper sealing plate, and the middle L seal clamps a steel wire mesh in the middle; the middle L seal is extruded by the upper driving member and the lower driving member to pre-press the front O seal.

[0014] Preferably, the left C seal and the right C seal of the fifth region are respectively connected to the left D seal and the right D seal of the third region and the fourth region to pre-press; the left C seal and the right C seal are wrapped with the left D seal, the right D seal, the front X seal and the rear X seal, and the upper sealing plate and the lower sealing plate.

[0015] Preferably, the front spacer and the rear spacer are both provided with an internal slag scraping plate, a circular strip-shaped elastic body is arranged below the slag scraping plate, and O-rings are arranged outside the front spacer and the rear spacer.

[0016] The present application has the following beneficial effects:

[0017] Compared with the prior art, the first region, the second region, the third region, the fourth region and the fifth region form a superimposed combined sealing system, and the third region, the fourth region and the fifth region are multi-sealed and overlapped, which effectively solves the problem of leakage of the non-integral sealing plate cross-flow sealing seat structure, and at the same time, the sealing seat can block the medium spouting and leakage under high pressure difference, thereby greatly improving the safety during the replacement of the cutting tool. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a tree distribution diagram of the sealing system of the sealing seat of the present application.

[0019] Figure 2 is a superimposed diagram of the sealing system of the present application.

[0020] Figure 3 is a cut-off diagram of the sealing system of the present application.

[0021] Figure 4 is a diagram of the L sealing structure of the present application.

[0022] Figure 5 is a diagram of the dustproof plate structure of the present application.

[0023] Figure 6 is a diagram of the combined stereoscopic structure of the packing structure of the present application.

[0024] Figure 7 is a diagram of the sectional structure of the present application. Figure 6

[0025] In the figure: 1, upper sealing plate; 2, dustproof plate; 3, pressing plate; 4, left packing; 5, right packing; 6, left upper lubrication; 7, left D sealing; 8, rear X sealing; 9, right D sealing; 10, front X sealing; 11, right upper lubrication; 12, right C sealing; 13, front O sealing; 14, left lower lubrication; 15, right lower lubrication; 16, lower sealing plate; 17, screw; 18, middle L sealing; 20, front packing; 21, rear packing; 30, front isolation body; 40, rear isolation body; 61, guide plate; 90, left C sealing; 108, O ring; 115, mud and stone; 212, elastomer; 215, slag scraping plate; 702, self-lubricating gasket; 801, steel mesh; 823, alloy plate; 843, rubber. DETAILED DESCRIPTION

[0026] The present application is further described below in combination with the accompanying drawings and examples.

[0027] Specific reference is made to the accompanying drawings and examples. Figure 1 - the accompanying drawings and examples. Figure 6 ​A shield sealing seat sealing system comprises a sealing assembly, a sealing plate and an isolator, the sealing plate is composed of an upper sealing plate 1 and a lower sealing plate 16; the upper sealing plate 1 and the lower sealing plate 16 are respectively connected with a driving member; the sealing system is composed of multiple sealing members; the sealing assembly is respectively fixed on a front isolator 30 and a rear isolator 40; the sealing assembly is composed of a filler, a D sealing, an X sealing, a C sealing and a middle L sealing; the front filler 20, the rear filler 21, the left filler 4 and the right filler 5 are arranged around the first area where the upper sealing plate 1 is located; the front X sealing 10, the rear X sealing 8, the left D sealing 7 and the right D sealing 9 are arranged around the third area where the upper sealing plate 1 is located; the front O sealing 13 is fixed on the front isolator 30; the front filler 20, the rear filler 21, the left filler 4 and the right filler 5 are arranged around the second area where the lower sealing plate 16 is located; the front X sealing 10, the rear X sealing 8, the left D sealing 7 and the right D sealing 9 are arranged around the fourth area where the lower sealing plate 16 is located; the fifth area comprises the third area, the fourth area, the middle L sealing 18, the left C sealing 90, the right C sealing 12, the left upper lubrication 6, the left lower lubrication 14, the right upper lubrication 11 and the right lower lubrication 15.

[0028] In summary, the first area, the second area, the third area, the fourth area and the fifth area in the application form a superimposed combined sealing system, especially the third area, the fourth area and the fifth area are multiple sealing lap joints, effectively solving the problem of slurry leakage of the non-integral sealing plate cut-off sealing seat structure, and at the same time, the sealing seat can block the medium gushing and slurry leakage under high pressure difference, greatly improving the safety of the process of replacing the cutting tool.

[0029] Further, the front filler 20, the rear filler 21, the left filler 4 and the right filler 5 around the first area where the upper sealing plate 1 is located are all isosceles triangle and trapezoidal combination in transverse cross-sectional shape, the filler is a long strip body, wraps the upper sealing plate or the lower sealing plate, and the trapezoidal cross-sectional filler is pressed on the triangular cross-sectional filler, the upper part of the filler is pressed tightly by the pressing plate 3, and the dustproof plate 2 is further arranged on the pressing plate 3; the dustproof plate 2 is formed by vulcanization of an alloy plate 823 and rubber 843.

[0030] Through the above structural design, the triangular and trapezoidal cross-sectional fillers generate wedge tightness when wrapping the upper sealing plate or the lower sealing plate after layered pressure, increase the sealing specific pressure, make the sealing performance more stable, especially after multiple movements of the upper sealing plate and the lower sealing plate, the fillers will not be loose, the sealing effect is good, and the wedge effect is generated. Compared with the rectangular cross-sectional filler, the triangular and trapezoidal fillers have stronger filling performance and better gap supplement.

[0031] Further, the front filler 20, the rear filler 21, the left filler 4 and the right filler 5 around the second area where the lower sealing plate 16 is located are isosceles triangle and trapezoidal combination in shape, the upper part of the filler is pressed tightly by the pressing plate 3, and the dustproof plate 2 is further arranged on the pressing plate, and the dustproof plate 2 is formed by vulcanization of an alloy plate 823 and rubber 843.

[0032] Among the third area front X seal 10, rear X seal 8, left D seal 7, right D seal 9 where the upper sealing plate 1 is located, the length of the front X seal 10 is less than the length of the rear X seal 8, and the length of the front X seal 10 is greater than the width of the upper sealing plate 1; the left D seal 7 and the right D seal 9 are pressed on the front X seal 10 and the rear X seal 8, and the upper sealing plate 1 and the third area are fixed with the front spacer 30 and the rear spacer 40 respectively.

[0033] Through the above structural design, the front X seal in the sealing system is smaller than the rear X seal, and the rear X seal is larger than the upper sealing plate, so that the left D seal and the right D seal are pressed on the rear X seal, and the front X seal avoids the auxiliary sealing hole on the left D seal and the right D seal. Four of them fully wrap the upper sealing plate without gap lap, and combine to form a third area sealing system.

[0034] Among the fourth area front X seal 10, rear X seal 8, left D seal 7, right D seal 9 where the lower sealing plate 16 is located, the length of the front X seal 10 is less than the length of the rear X seal 8, and the length of the front X seal 10 is greater than the width of the lower sealing plate 16; the left D seal 7 and the right D seal 9 are pressed on the front X seal 10 and the rear X seal 8, and the fourth area of the lower sealing plate 16 is fixed on the front spacer 30 and the rear spacer 40 respectively.

[0035] In the sealing system, the front X seal is smaller than the rear X seal, and the rear X seal is larger than the lower sealing plate, so that the left D seal and the right D seal are pressed on the rear X seal, and the front X seal avoids the auxiliary sealing hole on the left D seal and the right D seal. Four of them fully wrap the lower sealing plate without gap lap, and combine to form a fourth area sealing system.

[0036] The middle L seal 18 is fixed on the upper sealing plate 1 and is provided with a screw 17 for fixation, and further the middle L seal 18 clamps the steel wire mesh 801 in the middle; the middle L seal 18 is pressed by the upper driving part and the lower driving part and is pressed on the front O seal 13.

[0037] Through the above structural design, since the upper sealing plate and the lower sealing plate are combined in a split type, after the closing movement of the two, effective sealing is formed to block the medium, so the L seal is increased. The L seal is pressed by the upper sealing plate and the lower sealing plate to generate three direction cross section elongation, the elongation is lapped with the C seal and the O seal to combine a new type sealing system to block the medium again. Since the upper sealing plate and the lower sealing plate are frequently pressed or encounter sand and stone, the service life is inevitably reduced, so the steel wire mesh is fixed in the L seal, which on one hand shapes, and on the other hand enhances the strength and has high tear resistance.

[0038] The fifth area left C seal 90 and right C seal 12 are respectively connected to the third and fourth area left D seal 7 and right D seal 9 for pre-pressing; the left C seal 90 and the right C seal 12 wrap the upper sealing plate 1 and the lower sealing plate 16 with the left D seal 7, the right D seal 9, the front X seal 10 and the rear X seal 8.

[0039] The fifth area sealing system adopts C sealing combined with the third area sealing system and the fourth sealing system to form a new sealing system, preferably connecting the third and fourth area sealing systems in series, preferably connecting the upper sealing plate and the lower sealing plate in series, and effectively cutting off the medium again.

[0040] The front spacer 30 and the rear spacer 40 are provided with copper alloy internal slag scraping plates 215, and the slag scraping plates 215 are provided with circular strip-shaped elastic bodies 212 below, and the front spacer 30 and the rear spacer 40 are further provided with O-rings 108 outside.

[0041] Due to the up-down movement of the upper sealing plate and the lower sealing plate, the slag scraping plates scrape the mud, slag and soil deposited on the upper and lower sealing plates in the cavity, protect the sealing system, prevent damage, and prolong the service life, and the elastic body is beneficial to the flexible slag scraping of the slag scraping plate, even if sand and stones enter, it also has the effect of slag scraping.

[0042] The upper sealing plate 1 and the lower sealing plate 16 are provided with guide plates 61 on the side edges.

[0043] The front spacer 30 and the rear spacer 40 are provided with 16 self-lubricating gaskets 702.

[0044] The application will be further described below in conjunction with specific embodiments.

[0045] Please refer to Figure 1 、 Figure 2 and Figure 3 , the present application is a kind of shield sealing seat sealing system, around upper sealing plate 1, first area combination formula is formed by front packing 20, rear packing 21, left packing 4, right packing 5, packing sealing ring is formed, further, the first area is pre-pressed by pressing plate 3 to form the sealing specific pressure of the whole circumference, dustproof plate 2 is arranged on synchronous pressing plate 3, and external particulate matter is isolated.

[0046] Around the lower sealing plate 16, the second area combination formula is formed by the front packing 20, the rear packing 21, the left packing 4 and the right packing 5, and the packing sealing ring is formed, further, the first area is pre-pressed by the pressing plate 3 to form the sealing specific pressure of the whole circumference, and the dustproof plate 2 is arranged on the synchronous pressing plate 3 to isolate the external particulate matter.

[0047] In the third area and the fourth area, the front X sealing 10 and the rear X sealing 8 are arranged around the upper sealing plate 1 and the lower sealing plate 16, the front X sealing 10 is fixed on the front spacer 30, the rear X sealing 8 is fixed on the rear spacer 40, the left D sealing 7 and the right D sealing 9 are connected on the side edges of the upper sealing plate 1 and the lower sealing plate 16, and the annular inner ring is formed again.

[0048] As the fifth area further combines the third area, the fourth area, the left C seal 90, the right C seal 12, the front O seal 13, the left upper lubricating 6, the left lower lubricating 14, the right upper lubricating 11, the right lower lubricating 15 and the middle L seal 18, each seal overlaps to form an effective sealing system to block the mud and stone 115 with high pressure P.

[0049] In addition, as Figure 3 , Figure 4 The middle L seal 18 clamps the steel wire mesh 801 and is connected to the upper sealing plate 1 by the screw 17. The upper sealing plate 1 and the lower sealing plate 16 are opened and closed under the upper driving member and the lower driving member. The middle L seal 18 protrudes and is compressed to the front O seal 13 and the left C seal 90 and the right C seal 12. The left C seal 90 and the right C seal 12 are connected by being squeezed at both ends by the left D seal 7 and the right D seal 9.

[0050] Further prolong the service life of the sealing system, such as Figure 5 The dustproof plate 2 is divided into two layers. The fixed layer is made of an alloy plate 823 and the slag scraping layer is made of rubber 843.

[0051] Further implementation steps of the application:

[0052] 1. The rear X seal 8 is mounted on the rear isolation body 40 with a self-lubricating gasket 702, and then the elastic body 212 and the slag scraping plate 215 are mounted;

[0053] 2. The left D seal 7 and the right D seal 9 are placed in the grooves at both ends of the rear X seal 8, and the left C seal 90 and the right C seal 12 are mounted;

[0054] 3. The upper sealing plate 1 with the guide plate 61 and the middle L seal 18 is placed on the open slot upper part of the rear isolation body 40;

[0055] 4. The lower sealing plate 16 with the guide plate 61 is symmetrically placed on the open slot lower part of the rear isolation body 40;

[0056] 5. The front X seal 10 is mounted on the front isolation body 30 with a self-lubricating gasket 702, and then the elastic body 212 and the slag scraping plate 215 are mounted;

[0057] 6. The front O seal 13 is mounted in the rectangular groove of the front isolation body 30;

[0058] 7. The front isolation body 30 with the sealing system is placed on the rear isolation body 40 with the upper sealing plate 1, the lower sealing plate 16 and the sealing assembly, and is fixed and locked by bolts;

[0059] 8. The left D seal 7 and the right D seal 9 are respectively Figure 6The front filler 20, the rear filler 21, the left filler 4 and the right filler 5 are shown to be filled in the cavity formed by the front spacer 30 and the rear spacer 40, the rear is pressed into the pressing plate 3, and the dustproof plate 2 is placed to lock the bolt; the assembled sealing seat is filled with the O-shaped ring 108.

[0060] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shield seal seat sealing system, comprising a sealing assembly, a sealing plate, a driving member, and an isolator, characterized in that: The sealing plate is composed of an upper sealing plate (1) and a lower sealing plate (16); the upper sealing plate (1) and the lower sealing plate (16) are respectively connected to the driving member; the sealing system includes a plurality of sealing components, the isolating body includes a front isolating body (30) and a rear isolating body (40), the sealing components are respectively fixed on the front isolating body (30) and the rear isolating body (40), and the sealing components are composed of a filler, a D seal, an X seal, a C seal, and a middle L seal; the plurality of sealing components form a first area, a second area, a third area, a fourth area, and a fifth area, the fifth area includes the third area and the fourth area, and the first area and the second area are respectively located on both sides of the fifth area.

2. A shield seal seat sealing system according to claim 1, characterized in that: The first area and the second area are both provided with a front filler (20), a rear filler (21), a left filler (4), and a right filler (5).

3. A shield seal seat sealing system according to claim 2, characterized in that: The front filler (20), the rear filler (21), the left filler (4), and the right filler (5) are in the shape of a combination of an isosceles triangle and a trapezoid. The filler is in the shape of a long strip and wraps around the upper sealing plate or the lower sealing plate. It also includes a pressing plate (3), and the upper part of the filler is pressed by the pressing plate (3).

4. A shield seal seat sealing system according to claim 3, characterized in that: A dustproof plate (2) is provided on the pressing plate (3); the dustproof plate (2) is formed by vulcanization of an alloy plate (823) and rubber (843).

5. The shield seal seat sealing system according to claim 1, characterized in that: The third area and the fourth area are both provided with a front X seal (10), a rear X seal (8), a left D seal (7), and a right D seal (9).

6. A shield seal seat sealing system according to claim 5, characterized in that: The length of the front X seal (10) is less than the length of the rear X seal (8), and the length of the front X seal (10) is greater than the width of the upper sealing plate (1); the left D seal (7) and the right D seal (9) are pressed against the front X seal (10) and the rear X seal (8), respectively; the upper sealing plate (1) and the third area are fixed to the front isolator (30) and the rear isolator (40), respectively.

7. The shield seal seat sealing system according to claim 1, characterized in that: The fifth area also includes a middle L seal (18), a left C seal (90), a right C seal (12), a left upper lubrication (6), a left lower lubrication (14), a right upper lubrication (11), a right lower lubrication (15) and a front O seal (13), and the front O seal (13) is fixed on the front isolator (30).

8. A shield seal seat sealing system according to claim 7, characterized in that: The middle L seal (18) is fixed to the upper sealing plate (1), and the steel mesh (801) is clamped in the middle of the middle L seal (18); the middle L seal (18) is squeezed by the upper driving member and the lower driving member and pre-pressed on the front O seal (13).

9. The shield seal seat sealing system according to claim 7, characterized in that: The left C seal (90) and the right C seal (12) in the fifth area are pre-pressed with the left D seal (7) and the right D seal (9) in the third and fourth areas, respectively; the left C seal (90), the right C seal (12), the left D seal (7), the right D seal (9), the front X seal (10), and the rear X seal (8) wrap the upper sealing plate (1) and the lower sealing plate (16).

10. The shield seal seat sealing system according to claim 1, characterized in that: The front isolator (30) and the rear isolator (40) are both provided with an internal scraping plate (215), a circular strip elastic body (212) is provided under the scraping plate (215), and an O-ring (108) is provided outside the front isolator (30) and the rear isolator (40).

Images