Shield receiving and sealing device

Abstract

The shield receiving and sealing device comprises a tunnel portal steel ring, a first annular steel plate and a second annular steel plate are fixedly arranged on the inner ring wall of the tunnel portal steel ring in the axial direction at intervals, the tunnel portal steel ring, the first annular steel plate and the second annular steel plate jointly define an annular cavity with a radial inner opening, and the annular cavity is fixedly filled with an elastic compression body. And kerfs are formed in the inner ring surfaces of the first annular steel plate and the second annular steel plate at intervals in the circumferential direction. According to the shield receiving and sealing device, when a shield body of a shield machine is in contact with the first annular steel plate and the second annular steel plate, the first annular steel plate and the second annular steel plate are turned over from the kerf and tightly abut against a shield shell under the pushing and pressing effect; the shield receiving sealing device is simple in overall structure, capable of being installed on a construction site, convenient to install and small in damage to materials, the materials and labor force are greatly saved, and then the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine construction, in particular to a shield receiving sealing device. Background Art

[0002] In the field of shield receiving devices, the existing sealing structure is usually composed of a rubber curtain, a portal pressure plate and a circular ring plate. The rubber curtain is installed around the portal to form an annular sealing belt to prevent groundwater and sediment from entering the shield receiving area. The portal pressure plate is connected to the portal structure by bolts or other connection methods to ensure that the rubber curtain fits tightly to the portal surface and provides effective sealing. The circular ring plate is installed between the rubber curtain and the portal pressure plate to enhance the structural strength of the sealing device and further improve the sealing effect. However, this traditional sealing structure has some obvious shortcomings. First, its installation process is relatively complicated, which requires a lot of time and manpower, resulting in low construction efficiency. Secondly, the material consumption is large, which increases the project cost. Utility Model Content

[0003] In view of this, the utility model proposes a shield receiving sealing device to facilitate on-site installation while improving sealing effect, construction efficiency and reducing costs.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A shield receiving sealing device comprises a portal steel ring, an inner ring wall of which is fixedly provided with a first annular steel plate and a second annular steel plate at axial intervals, the portal steel ring and the first annular steel plate and the second annular steel plate together form an annular cavity with a radial inward opening, the annular cavity is fixedly filled with an elastic compression body, and the inner ring surfaces of the first annular steel plate and the second annular steel plate are provided with slits at intervals along their circumferential direction.

[0006] In order to better implement the above technical solution, optionally, the first annular steel plate and the second annular steel plate are fixedly provided with reinforcing plates at the connection with the tunnel portal steel ring.

[0007] Optionally, the reinforcing plate is a triangular plate.

[0008] Optionally, the interval between adjacent slits along the circumference of the first annular steel plate or the second annular steel plate is 80mm-120mm, the depth of the slit is 110mm-130mm, and the radial length of the first annular steel plate or the second annular steel plate is greater than the depth of the slit.

[0009] Optionally, the distance between the first annular steel plate and the second annular steel plate is 180mm-220mm.

[0010] Optionally, the first annular steel plate and the second annular steel plate are both formed by welding a plurality of arc-shaped steel plates.

[0011] Optionally, the thickness of the first annular steel plate and the second annular steel plate are both 3 mm.

[0012] Optionally, the elastic compression body is an annular sponge pad.

[0013] Beneficial effects of the utility model:

[0014] The utility model discloses a shield receiving sealing device. When the shield body of the shield machine touches the first annular steel plate and the second annular steel plate, the first annular steel plate and the second annular steel plate are folded from the cut seam by the pushing action and are tightly pressed against the shield shell. At the same time, the elastic compression body is compressed to form a sealing structure together with the first annular steel plate and the second annular steel plate. The shield receiving sealing device has a simple overall structure and can be installed at the construction site. The installation is convenient and the damage to materials is small, which greatly saves materials and labor, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side cross-sectional view of a shield receiving sealing device according to an embodiment of the utility model;

[0016] Figure 2 This is a front view / back view of a shield receiving sealing device according to an embodiment of the utility model;

[0017] Figure 3 It is a front cross-sectional view of a shield receiving sealing device according to an embodiment of the utility model;

[0018] Reference numerals

[0019] The tunnel gate steel ring 10 , the first annular steel plate 20 , the slit 201 , the second annular steel plate 30 , the elastic compression body 40 , and the reinforcing plate 50 . DETAILED DESCRIPTION

[0020] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.

[0021] See also Figures 1 to 3 The embodiment of the utility model discloses a shield receiving sealing device, including a portal steel ring 10, a first annular steel plate 20, a second annular steel plate 30 and an elastic compression body 40.

[0022] Specifically, the first annular steel plate 20 and the second annular steel plate 30 are axially spaced apart along the portal steel ring 10, the outer annular surfaces of the first annular steel plate 20 and the second annular steel plate 30 are fixedly connected to the inner annular surface of the portal steel ring 10, and together form an annular cavity with a radial inward opening, the annular cavity is fixedly filled with an elastic compression body 40, the inner annular surfaces of the first annular steel plate 20 and the second annular steel plate 30 are spaced apart along their circumferential direction with slits 201, the circumferential spacing of adjacent slits 201 along the first annular steel plate 20 or the second annular steel plate 30 is 80mm-120mm, the depth of the slit 201 is 110mm-130mm, and the radial length of the first annular steel plate 20 or the second annular steel plate 30 is greater than the depth of the slit.

[0023] The embodiment of the utility model discloses a shield receiving sealing device. When the shield body of the shield machine touches the first annular steel plate 20 and the second annular steel plate 30, the first annular steel plate 20 and the second annular steel plate 30 are folded from the slit 201 by the pushing action and are tightly pressed against the shield shell. At the same time, the elastic compression body 40 is compressed to form a sealing structure together with the first annular steel plate 20 and the second annular steel plate 30. The shield receiving sealing device has a simple overall structure and can be installed at the construction site. The installation is convenient and the damage to the material is small, which greatly saves the material and labor, thereby saving the cost.

[0024] like Figure 1 As shown, the first annular steel plate 20 and the second annular steel plate 30 are fixedly provided with a reinforcing plate 50 at the connection with the portal steel ring 10. There are multiple reinforcing plates 50, which are arranged at intervals in the circumferential direction around the first annular steel plate 20 and the second annular steel plate 30. The reinforcing plate 50 at the first annular steel plate 20 is fixed on the side of the first annular steel plate 20 facing the second annular steel plate 30, and the reinforcing plate 50 at the second annular steel plate 30 is fixed on the side of the second annular steel plate 30 away from the first annular steel plate 20. The reinforcing plate 50 can be a triangular plate fixed at the corresponding position by welding to increase the connection strength between the first annular steel plate 20 and the second annular steel plate 30 and the portal steel ring 10, which can effectively resist the thrust generated when the shield body of the shield machine passes through.

[0025] like Figure 2 and Figure 3As shown, when the outer diameter of the shield of the shield machine is 6830mm and the tunnel portal steel ring is 107100mm, there is a gap of 135mm between the shield body and the tunnel portal steel ring 10. At this time, the radial length of the first annular steel plate 20 or the second annular steel plate 30 can be selected to be 200mm, and the depth of the slit 201 can be selected to be 120mm. At this time, the first annular steel plate 20 and the second annular steel plate 30 both have sufficient bending space. At the same time, the spacing between the first annular steel plate 20 and the second annular steel plate 30 is 180mm-220mm. In order to facilitate the shield body to push the first annular steel plate 20 and the second annular steel plate 30 and to make the first annular steel plate 20 and the second annular steel plate 30 have sufficient supporting strength, preferably, the thickness of the first annular steel plate 20 and the second annular steel plate 30 are both 3mm.

[0026] like Figure 2 As shown, the first annular steel plate 20 and the second annular steel plate 30 are both formed by welding a plurality of arc-shaped steel plates, which is convenient for on-site installation and transportation of materials.

[0027] In the embodiment of the present invention, the elastic compression body 40 is an annular sponge pad.

[0028] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.

Claims

1. A shield receiving sealing device, comprising a tunnel portal steel ring (10), characterized in that: The inner ring wall of the tunnel gate steel ring (10) is fixedly provided with a first annular steel plate (20) and a second annular steel plate (30) at intervals in the axial direction. The tunnel gate steel ring (10), the first annular steel plate (20) and the second annular steel plate (30) together form an annular cavity with a radial inward opening. The annular cavity is fixedly filled with an elastic compression body (40). The inner ring surfaces of the first annular steel plate (20) and the second annular steel plate (30) are provided with slits (201) at intervals along their circumferential direction. The interval between adjacent slits (201) along the circumference of the first annular steel plate (20) or the second annular steel plate (30) is 80 mm to 120 mm, the depth of the slits (201) is 110 mm to 130 mm, and the radial length of the first annular steel plate (20) or the second annular steel plate (30) is greater than the depth of the slits (201); When the shield body of the shield machine touches the first annular steel plate (20) and the second annular steel plate (30), the first annular steel plate (20) and the second annular steel plate (30) are folded from the cut by the pushing action and tightly pressed against the shield shell, and at the same time, the elastic compression body (40) is compressed to form a sealing structure together with the first annular steel plate (20) and the second annular steel plate (30).

2. A shield receiving sealing device according to claim 1, characterized in that: A reinforcing plate (50) is fixedly provided at the connection between the first annular steel plate (20) and the second annular steel plate (30) and the tunnel portal steel ring (10).

3. A shield receiving sealing device according to claim 2, characterized in that: The reinforcing plate (50) is a triangular plate.

4. A shield receiving sealing device according to claim 1, characterized in that: The distance between the first annular steel plate (20) and the second annular steel plate (30) is 180 mm-220 mm.

5. A shield receiving sealing device according to claim 1, characterized in that: The first annular steel plate (20) and the second annular steel plate (30) are both formed by welding a plurality of arc-shaped steel plates.

6. A shield receiving sealing device according to claim 1, characterized in that: The thickness of the first annular steel plate (20) and the second annular steel plate (30) are both 3 mm.

7. A shield receiving sealing device according to claim 1, characterized in that: The elastic compression body (40) is an annular sponge pad.

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