A shaft sealing cap arrangement

Abstract

The application discloses a shaft sealing cover device and relates to the technical field of shaft construction. The shaft sealing cover device comprises a supporting seat and a sealing cover. The supporting seat is arranged in a shaft and connected with a shaft wall. The sealing cover is connected above the supporting seat. The outer edge of the sealing cover is connected with a sealing assembly used for sealing cooperation with the shaft wall. The supporting seat, the sealing cover and the sealing assembly can be prefabricated in advance. Only installation operation needs to be performed on site. The traditional cast-in-situ concrete mode is abandoned. Complicated procedures such as complicated formwork erection, steel bar binding and concrete pouring on site are avoided. The construction process is greatly simplified. The construction period is shortened. The construction efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of shaft construction technology, specifically to a shaft sealing cover device. Background Technology

[0002] Shafts are an important type of well-shaped passage in underground engineering. Their walls are vertical, and they are mainly used to connect the ground and underground spaces to realize the vertical transportation of personnel, equipment and materials, as well as ventilation and drainage functions.

[0003] In shaft construction, the pneumatic caisson construction method is a common technique. This method involves installing a sealing cover at the bottom of the shaft, using the cover, shaft wall, and excavation face to create an airtight chamber. During construction, air is injected into the airtight chamber, using the air pressure to expel groundwater from the shaft into the surrounding rock strata, thus creating a dry working environment within the airtight chamber, facilitating construction operations.

[0004] However, most existing shaft sealing covers are made using cast-in-place concrete. This method requires a series of complex construction procedures on-site, including formwork erection, rebar tying, and concrete pouring. The construction period is long and easily affected by external factors such as weather, leading to delays. Furthermore, the concrete curing time is also long, during which subsequent construction operations cannot be performed, further extending the construction period and increasing construction costs and management difficulties. Utility Model Content

[0005] The purpose of this application is to provide a shaft sealing cover device to solve the problem of long construction period caused by using concrete casting to make the sealing cover.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A shaft sealing cover device includes a support base and a sealing cover. The support base is disposed inside a shaft and connected to the shaft wall. The sealing cover is connected above the support base, and a sealing component for sealing and engaging with the shaft wall is connected to the outer edge of the sealing cover.

[0008] Furthermore, the sealing cover includes multiple splicing units that are joined together, with any two adjacent splicing units being sealed and fixedly connected.

[0009] Furthermore, the splicing unit includes a support frame and a sealing plate connected above the support frame.

[0010] Furthermore, the sealing cover and the support base are connected by a plurality of vertically arranged support rods.

[0011] Furthermore, the length of the support rod is adjustable.

[0012] Furthermore, the support rod includes a first rod and a second rod. The two ends of the first rod are respectively provided with internally threaded holes with opposite directions of rotation along its axial direction. The internally threaded holes at both ends of the first rod are respectively threaded to the second rod. The two second rods are respectively connected to the sealing cover and the support base.

[0013] Furthermore, the support base includes a central support, intermediate legs, and overlapping legs. A plurality of intermediate legs are arranged around the central support. One end of each intermediate leg is connected to the central support, and the other end of each intermediate leg is connected to the overlapping legs. The overlapping legs are used to connect to the shaft wall.

[0014] Furthermore, the support base also includes a support crossbar connected between two adjacent intermediate legs.

[0015] Furthermore, the sealing assembly includes a rubber sealing ring and an annular pressure plate. The rubber sealing ring is connected to the sealing cap and fits tightly against the outer side of the sealing cap. The annular pressure plate fits tightly against the top of the rubber sealing ring and is fixedly connected to the sealing cap.

[0016] Furthermore, the bottom of the rubber sealing ring is provided with an annular air pressure groove extending along its circumference.

[0017] The beneficial effects of this application are:

[0018] The shaft sealing cover device provided in this application provides a method to securely fix the sealing cover within the shaft by setting a support base connected to the shaft wall inside the shaft and connecting the sealing cover to the support base, ensuring its stability. A sealing component is set on the outer edge of the sealing cover, which fits tightly with the shaft wall, achieving a reliable seal between the sealing cover and the shaft wall. This creates an airtight chamber between the sealing cover, the shaft wall, and the excavation face. During construction, air is injected into the airtight chamber, using air pressure to drain groundwater from the shaft to the surrounding rock strata, thus creating a dry working environment within the airtight chamber and ensuring the smooth progress of shaft construction. This application allows for the prefabrication of the support base, sealing cover, and sealing component, requiring only on-site installation. This eliminates the need for traditional cast-in-place concrete methods, avoiding complex on-site procedures such as formwork erection, rebar tying, and concrete pouring, greatly simplifying the construction process, shortening the construction period, and improving construction efficiency. Furthermore, since there is no need to wait for concrete curing, the shaft sealing cover device of this application can immediately enter the subsequent construction stage after installation, which further reduces the construction waiting time, reduces the impact of external factors such as weather on the construction progress, enhances the controllability of construction, and thus effectively reduces construction costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the shaft sealing cover device provided in the embodiments of this application;

[0021] Figure 2 This is a front view of the shaft sealing cover device provided in the embodiments of this application;

[0022] Figure 3 This is a top view of the shaft sealing cover device provided in the embodiments of this application;

[0023] Figure 4 yes Figure 2 A sectional view along line AA.

[0024] Figure 5 yes Figure 2 Sectional view along line BB;

[0025] Figure 6 yes Figure 3 A cross-sectional view along the CC line;

[0026] Figure 7 yes Figure 6 Enlarged view of section A.

[0027] Figure label:

[0028] 10-Support base;

[0029] 101-Central support; 102-Intermediate support leg; 103-Overlapping support leg; 104-Supporting crossbar;

[0030] 20 - Sealing cap;

[0031] 21-Assembly unit; 211-Support frame; 212-Sealing plate;

[0032] 22-Manhole;

[0033] 23-Slag discharge hole;

[0034] 30 - Sealing assembly;

[0035] 31-Rubber sealing ring; 311-Annular air pressure groove; 312-Fixing ear; 313-Fixing pressure plate;

[0036] 32- Annular pressure plate;

[0037] 40 - Support rod;

[0038] 401 - First shot; 402 - Second shot;

[0039] 50 - Shaft wall;

[0040] 60 - Excavation face. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0042] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] See Figure 1 , Figure 2 This application provides a shaft sealing cover device, including a support base 10 and a sealing cover 20. The support base 10 is used to be installed in the shaft and connected to the shaft wall 50. The sealing cover 20 is connected above the support base 10. The outer edge of the sealing cover 20 is connected to a sealing component 30 for sealing and cooperating with the shaft wall 50.

[0045] Specifically, the support base 10 is installed inside the shaft and fixedly connected to the shaft wall 50, used for the installation and support of the sealing cover 20. The support base 10 can be made of steel and has sufficient load-bearing capacity and stability to ensure the sealing cover 20 is firmly fixed during construction. The support base 10 can be fixedly connected to the shaft wall 50 by bolts or anchor rods and other connecting parts. The distribution density and strength of the connecting parts should be designed according to the size of the shaft and construction requirements to ensure a firm and reliable connection between the support base 10 and the shaft wall 50.

[0046] The sealing cover 20 can be a circular flat plate structure, and its size and shape should match the cross-sectional dimensions and shape of the shaft to ensure that it can cover the shaft opening. The sealing cover 20 can be made of steel or high-strength composite materials, with good compressive strength and corrosion resistance, and can withstand air pressure changes and groundwater pressure during construction. The sealing cover 20 can be fixed to the support base 10 by welding or bolting. The connection should be sealed to ensure that there is no gas leakage at the connection between the sealing cover 20 and the support base 10. The sealing cover 20 has multi-functional openings such as a manhole 22 and a slag discharge hole 23. The manhole 22 facilitates the entry and exit of personnel during construction, while the slag discharge hole 23 is used to discharge the broken soil and debris during construction.

[0047] The sealing assembly 30 is installed on the outer edge of the sealing cover 20 to form a sealing fit with the shaft wall 50, preventing gas leakage between the sealing cover 20 and the shaft wall 50. The sealing assembly 30 can be made of flexible sealing materials such as rubber or silicone, and has good elasticity and sealing performance. It can be installed on the outer edge of the sealing cover 20 by adhesive bonding or mechanical fixation.

[0048] See Figure 2 The shaft sealing cover device provided in this application embodiment can firmly fix the sealing cover 20 in the shaft by setting a support base 10 connected to the shaft wall 50 inside the shaft and connecting the sealing cover 20 to the support base 10, thus ensuring its stability. By setting a sealing component 30 on the outer edge of the sealing cover 20, the sealing component 30 is tightly fitted with the shaft wall 50 to achieve a reliable seal between the sealing cover 20 and the shaft wall 50, thereby forming an airtight chamber between the sealing cover 20, the shaft wall 50 and the excavation face 60. During the construction process, air is injected into the airtight chamber, and the air pressure is used to discharge the groundwater in the well to the rock strata outside the well, thereby forming a dry working environment in the airtight chamber and ensuring the smooth progress of shaft construction.

[0049] This application allows for the prefabrication of the support base 10, sealing cover 20, and sealing component 30, requiring only on-site installation. This eliminates the need for traditional cast-in-place concrete installation, avoiding the complex procedures of formwork erection, rebar tying, and concrete pouring, significantly simplifying the construction process, shortening the construction period, and improving construction efficiency. Furthermore, since there is no need to wait for concrete curing, the shaft sealing cover device can immediately proceed to subsequent construction stages after installation, further reducing construction waiting time, mitigating the impact of external factors such as weather on the construction progress, enhancing construction controllability, and effectively reducing construction costs.

[0050] In some embodiments, see Figure 3 The sealing cover 20 includes multiple splicing units 21 spliced ​​together, and any two adjacent splicing units 21 are sealed and fixedly connected.

[0051] Specifically, the splicing unit 21 is made of steel or high-strength composite material, possessing excellent compressive strength and corrosion resistance. The shape of the splicing unit 21 can be rectangular, square, arc-shaped, or other suitable for splicing. Its dimensions are designed according to the cross-sectional dimensions of the shaft and construction requirements to ensure that the sealed cover 20 after splicing completely covers the shaft opening. During the splicing process, adjacent splicing units 21 are fixedly connected by bolts, welding, or clips, and their splicing surfaces are tightly fitted together using sealing strips, gaskets, or sealing grooves to ensure that gas cannot leak from the splicing location. The material of the sealing structure should have good elasticity and durability to withstand pressure changes and mechanical vibrations during construction.

[0052] Correspondingly, by setting the sealing cover 20 as a series of splicing units 21, each splicing unit 21 is smaller in size, making it easier to transport and hoist, and reducing the need for large equipment during construction. If a splicing unit 21 is damaged, the unit can be replaced individually without replacing the entire sealing cover 20, thus reducing maintenance costs and construction difficulty.

[0053] In some embodiments, see Figure 4 The splicing unit 21 includes a support frame 211 and a sealing plate 212 connected above the support frame 211.

[0054] Specifically, the support frame 211 is the main structure of the splicing unit 21. It is made of steel and has good load-bearing capacity and deformation resistance. Its shape can be a rectangular frame, a cross-shaped frame, or other structures suitable for splicing, depending on the size of the shaft and construction requirements. The support frame 211 has connecting structures on its edges for fixed connection with the support frames 211 of other splicing units 21.

[0055] The sealing plate 212 can be fixed to the top of the support frame 211 by welding or bolting to form the sealing surface of the sealing cover 20. The sealing plate 212 can be made of steel plate or high-strength composite plate, with good sealing performance and durability. Its thickness and strength should be designed according to the construction requirements of the shaft to ensure that it will not deform or leak under air pressure.

[0056] Correspondingly, by setting the splicing unit 21 as a supporting frame 211 and a sealing plate 212 connected to the top of the supporting frame 211, the structural strengthening function of the supporting frame 211 can be fully utilized, providing stable support for the sealing plate 212, thereby effectively improving the overall strength and stability of the splicing unit 21. Compared with using all-steel plates to make the splicing unit 21, this not only significantly reduces the amount of steel used and lowers material costs, but also reduces the weight of the splicing unit 21, facilitating transportation and installation, and further improving construction efficiency.

[0057] In some embodiments, see Figure 1 , Figure 2 , Figure 6 The sealing cover 20 and the support base 10 are connected by multiple vertically arranged support rods 40.

[0058] Specifically, the support rod 40 is made of high-strength steel, possessing excellent load-bearing capacity and resistance to deformation. Its outer surface can be treated with anti-corrosion coating to adapt to the humid environment inside the shaft. The support rod 40 is vertically installed, with its upper end connected to the sealing cover 20 by bolts or welding, and its lower end connected to the support base 10 by bolts or welding. Multiple support rods 40 can be evenly distributed between the sealing cover 20 and the support base 10 to form a stable support structure. The number and distribution density of the support rods 40 should be designed according to the size of the sealing cover 20 and the load requirements to ensure the stability of the overall device; no specific limitations are made here.

[0059] Correspondingly, the multiple support rods 40 can effectively distribute the weight of the sealing cover 20 and various loads generated during construction, ensuring that the sealing cover 20 remains stable under air pressure and avoiding deformation or damage due to excessive local stress. Furthermore, the support rods 40 create additional installation space between the sealing cover 20 and the support base 10, allowing for the installation of auxiliary equipment. Simultaneously, the support base 10 can also serve as the frame for the tunneling equipment, achieving functional versatility.

[0060] In some embodiments, see Figure 1 , Figure 2 , Figure 6The length of the support rod 40 is adjustable. The support rod 40 can adopt a telescopic structure, with its length adjusted via a threaded connection. For example, the support rod 40 can consist of an inner rod and an outer tube, with the inner rod threaded into the outer tube to achieve length adjustment. Accordingly, by setting an adjustable-length support rod 40, its length can be flexibly adjusted during installation to adapt to the installation height requirements of the sealing cover 20.

[0061] For example, see Figure 6 The support rod 40 includes a first rod 401 and a second rod 402. The first rod 401 has internally threaded holes with opposite directions of rotation at both ends along its axial direction. These internally threaded holes are threaded to the second rods 402. The two second rods 402 are connected to the sealing cover 20 and the support base 10, respectively. The connection between the two second rods 402 and the sealing cover 20 and the support base 10 can be achieved by welding, bolting, or hinge. Correspondingly, by rotating the first rod 401, the distance between the two second rods 402 can be adjusted, thereby achieving rapid and precise adjustment of the length of the support rod 40.

[0062] In some embodiments, see Figure 5 The support base 10 includes a central support 101, intermediate support legs 102 and overlapping support legs 103. Multiple intermediate support legs 102 are arranged around the central support 101. One end of the intermediate support leg 102 is connected to the central support 101, and the other end of the intermediate support leg 102 is connected to the overlapping support leg 103. The overlapping support leg 103 is used to connect to the shaft wall 50.

[0063] Specifically, the central support 101, intermediate support legs 102, and lap support legs 103 can all be made of steel, possessing sufficient load-bearing capacity and stability. The intermediate support legs 102 are horizontally arranged elongated structures, with multiple intermediate support legs 102 evenly distributed around the central support 101. The number and distribution density of the intermediate support legs 102 should be designed according to the dimensions and load requirements of the shaft, and no specific limitations are made here. One end of each intermediate support leg 102 can be fixedly connected to the central support 101 by bolts, and the other end can be fixedly connected to the lap support legs 103 by bolts. The lap support legs 103 can be fixedly connected to the shaft wall 50 by bolts or anchor bolts.

[0064] Correspondingly, through the combined design of the central support 101, the intermediate support leg 102 and the overlapping support leg 103, the support base 10 forms a stable support structure that can effectively bear the sealing cover 20 and its upper load, ensuring the stability of the entire device during construction.

[0065] In some embodiments, see Figure 5 The support base 10 also includes a support crossbar 104 connecting two adjacent intermediate legs 102.

[0066] Correspondingly, the adjacent intermediate legs 102 are connected by the support crossbar 104, forming a mutually supporting frame structure. This not only enhances the synergy between the intermediate legs 102, allowing them to distribute stress more evenly when bearing loads and avoiding deformation or damage caused by excessive local stress, but also effectively improves the overall rigidity of the support base 10, enabling it to better adapt to various complex working conditions that may occur during shaft construction. Furthermore, the support crossbar 104 provides additional connection points for the support rod 40, making its installation more versatile. For example, the support rod 40 can be connected to the central support 101, intermediate legs 102, overlapping legs 103, and support crossbar 104 respectively to support the sealing cover 20.

[0067] In some embodiments, see Figure 6 , Figure 7 The sealing assembly 30 includes a rubber sealing ring 31 and an annular pressure plate 32. The rubber sealing ring 31 is connected to the sealing cover 20 and fits tightly against the outer side of the sealing cover 20. The annular pressure plate 32 fits tightly against the top of the rubber sealing ring 31 and is fixedly connected to the sealing cover 20.

[0068] Specifically, the rubber sealing ring 31 is made of high-quality oil-resistant and corrosion-resistant rubber material, which has good elasticity and sealing performance. The rubber sealing ring 31 is annular in shape, with its inner diameter closely fitting the outer side of the sealing cover 20 and its outer diameter matching the inner wall of the shaft, which can effectively fill the gap between the sealing cover 20 and the shaft wall 50.

[0069] The rubber sealing ring 31 can be connected to the sealing cover 20 by adhesive bonding or mechanical fixing. For example, a sealing groove can be provided on the outer side of the sealing cover 20, the rubber sealing ring 31 can be embedded in the sealing groove and fixed by sealant; alternatively, a fixing lug 312 can be provided on the inner side of the rubber sealing ring 31, the fixing lug 312 extends to the upper surface of the sealing cover 20, and a fixing pressure plate 313 is bolted to the upper end face of the sealing cover 20, the fixing pressure plate 313 presses the fixing lug 312 and fixes it on the sealing cover 20.

[0070] The annular pressure plate 32 is annular and is fixedly connected to the sealing cover 20 by bolts. The lower surface of the annular pressure plate 32 contacts the top of the rubber sealing ring 31 and can completely cover the top of the rubber sealing ring 31 to limit the top of the rubber sealing ring 31 and apply uniform clamping force.

[0071] Correspondingly, after the shaft sealing cover device is installed in the shaft, by inflating the airtight chamber, the rubber sealing ring 31 deforms under the combined action of the air pressure in the airtight chamber and the annular pressure plate 32, and fits tightly against the outer surface of the shaft wall 50 and the sealing cover 20, thus achieving a reliable seal.

[0072] In some embodiments, see Figure 7 The bottom of the rubber sealing ring 31 is provided with an annular air pressure groove 311 extending along its circumference. Correspondingly, when the shaft sealing cover device is installed in the shaft, by inflating the airtight chamber, the gas generates pressure in the annular air pressure groove 311, causing the rubber sealing ring 31 to deform under pressure and tightly fit against the outer surface of the shaft wall 50 and the sealing cover 20, further improving the reliability of the seal.

[0073] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A vertical shaft sealing cover device, characterized in that, It includes a support base (10) and a sealing cover (20). The support base (10) is used to be installed in the shaft and connected to the shaft wall (50). The sealing cover (20) is connected above the support base (10). The outer edge of the sealing cover (20) is connected to a sealing component (30) for sealing and engaging with the shaft wall (50).

2. The shaft sealing cover device according to claim 1, characterized in that, The sealing cap (20) includes multiple splicing units (21) that are spliced ​​together, and any two adjacent splicing units (21) are sealed and fixedly connected.

3. The shaft sealing cover device according to claim 2, characterized in that, The splicing unit (21) includes a support frame (211) and a sealing plate (212) connected above the support frame (211).

4. The shaft sealing cover device according to claim 1, characterized in that, The sealing cap (20) and the support base (10) are connected by a plurality of vertically arranged support rods (40).

5. The shaft sealing cover device according to claim 4, characterized in that, The length of the support rod (40) is adjustable.

6. The shaft sealing cover device according to claim 5, characterized in that, The support rod (40) includes a first rod (401) and a second rod (402). The two ends of the first rod (401) are respectively provided with internal threaded holes with opposite directions along its axial direction. The internal threaded holes at both ends of the first rod (401) are respectively threaded to the second rod (402). The two second rods (402) are respectively connected to the sealing cover (20) and the support base (10).

7. The shaft sealing cover device according to claim 1, characterized in that, The support base (10) includes a central support (101), intermediate legs (102) and overlapping legs (103). A plurality of intermediate legs (102) are arranged around the central support (101). One end of the intermediate leg (102) is connected to the central support (101), and the other end of the intermediate leg (102) is connected to the overlapping leg (103). The overlapping leg (103) is used to connect to the shaft wall (50).

8. The shaft sealing cover device according to claim 7, characterized in that, The support base (10) also includes a support crossbar (104) connecting two adjacent intermediate legs (102).

9. The shaft sealing cover device according to claim 1, characterized in that, The sealing assembly (30) includes a rubber sealing ring (31) and an annular pressure plate (32). The rubber sealing ring (31) is connected to the sealing cover (20) and closely adheres to the outer side of the sealing cover (20). The annular pressure plate (32) is closely adhered to the top of the rubber sealing ring (31) and is fixedly connected to the sealing cover (20).

10. The shaft sealing cover device according to claim 9, characterized in that, The bottom of the rubber sealing ring (31) is provided with an annular air pressure groove (311) extending along its circumference.

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