Anti-leakage device of orifice pipe

Abstract

The utility model discloses an anti-leakage device of an orifice pipe, belongs to the technical field of orifice pipes, and solves the problem that an anti-leakage structure of an existing orifice pipe is high in production cost. The device comprises a fixing ring fixed to an orifice pipe, a plurality of bolt holes matched with a plurality of bolts are formed in the ring face of the fixing ring, the bolts penetrate through the bolt holes to be in threaded connection with a tunnel segment, and an annular air bag attached to the wall face of the tunnel segment is arranged between the tunnel segment and the fixing ring. An annular first water swelling rubber strip is arranged between the annular air bag and the fixing ring. Rapid installation is achieved through matching of the fixing rings and the bolts, the machining and maintenance cost is remarkably reduced, meanwhile, a preliminary sealing barrier is formed by combining physical attachment of the annular air bag and the wall face of the tunnel segment, gaps are filled through volume changes of the first water swelling rubber strips after the first water swelling rubber strips are swelled in water, a dual dynamic sealing mechanism is formed, and the sealing effect is improved. The anti-seepage performance is effectively improved, and meanwhile, the production cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of orifice pipe, and specifically relates to a seepage prevention device of orifice pipe. BACKGROUND

[0002] As a mature construction technology, the common construction method is to set an orifice pipe around the soil body that needs to be reinforced, fill in a medium such as brine in the orifice pipe, and realize soil body cooling through a freezing unit cycle. In the freezing construction process of a shield tunnel connecting passage, the freezing pipe for soil body cooling is connected with the circulating pipe through the orifice pipe.

[0003] At present, the seepage prevention measure of the orifice pipe is usually to wind a hemp silk during installation. When brine seepage occurs in the freezing pipe, the orifice pipe may be corroded, and the hemp silk winding operation needs certain operation technology and is prone to aging. The plugging condition is often not ideal, resulting in seepage at the joint of the concrete pipe piece, and affecting the freezing effect.

[0004] In order to solve the seepage problem of the orifice pipe, the utility model with publication number CN219195920U discloses an orifice pipe structure with sealing function. The orifice pipe structure is designed as a whole, a compression ball valve is arranged at the joint of the pipe piece, an anti-seepage gasket is arranged and filled with Na-based bentonite, and the pipe piece is fixed by self-locking expansion screws. The structure can effectively reduce the leakage of frozen liquid, but the structure is complex, the processing is difficult, the installation precision and maintenance cost are high, and the economic efficiency is poor if the whole set of components are purchased separately. UTILITY MODEL CONTENT

[0005] In view of the above problems in the prior art, the utility model provides a seepage prevention device of an orifice pipe, which solves the problem of high production cost of the seepage prevention structure of the existing orifice pipe.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A seepage prevention device of an orifice pipe is provided, which comprises a fixing ring fixed on the orifice pipe, a plurality of bolt holes matched with a plurality of bolts are formed on the annular surface of the fixing ring, the plurality of bolts are respectively threaded through the plurality of bolt holes and are screwed with tunnel pipe pieces, an annular air bag is arranged between the tunnel pipe pieces and the fixing ring and is attached to the wall surface of the tunnel pipe piece, the outer ring of the annular air bag is fixedly connected with the fixing ring, and a first water-swelling rubber strip in a ring shape is arranged between the annular air bag and the fixing ring.

[0008] In the scheme, the quick installation is realized through the fixing ring and the bolt, the traditional silk winding or the complex pressing device is replaced, the processing and maintenance costs are reduced, the physical sealing is formed by the annular air bag and the tunnel segment, the gap is filled after the first water swelling rubber strip swells after meeting water, and the anti-seepage effect is enhanced, the sealing is ensured while the low production cost is ensured.

[0009] Further, the fixing ring is provided with a sleeve fixed on the orifice pipe, and a second water swelling rubber strip in a ring shape is arranged on the outer end face of the sleeve.

[0010] Further, the thickness of the annular air bag gradually increases in the radial direction from the inner ring to the outer ring. The thickness gradient design makes the outer ring bear more stress when the air bag is pressed, and the inner ring remains flexible and closely fits the tunnel segment.

[0011] Further, a bent section fixedly connected with the fixing ring is arranged at the outer ring of the annular air bag. The bent section is arranged to facilitate fixed connection.

[0012] Further, a waterproof rubber pad is arranged on the connecting end face of the first water swelling rubber strip and the annular air bag. The waterproof rubber pad can further improve the sealing performance.

[0013] Further, a plurality of bolt holes are uniformly distributed on the fixing ring in the circumferential direction. The circumferentially uniform bolt holes make the fixing ring and the tunnel segment bear balanced stress, avoiding local stress too large to cause sealing failure.

[0014] Further, the material of the annular air bag is rubber.

[0015] Further, the material of the fixing ring is metal.

[0016] The utility model discloses a kind of anti-seepage devices of orifice pipe, which has the beneficial effects that:

[0017] The utility model realizes quick installation by the cooperation of fixing ring and bolt, replaces traditional silk winding or complex pressing device, significantly reduces processing and maintenance costs;At the same time, preliminary sealing barrier is formed by the physical adhesion of annular air bag and tunnel segment wall surface, and the gap is filled by the volume change of first water swelling rubber strip after meeting water swelling, to form double dynamic sealing mechanism, while effectively improving anti-seepage performance, low cost, high adaptability and long-term stability of device are considered, and the balance optimization of economy and sealing is realized. DRAWINGS

[0018] Figure 1 It is the installation schematic view of the anti-seepage device of orifice pipe.

[0019] Figure 2A front view of a leakage-proof device for a pipe with an orifice;

[0020] 1, fixing ring; 11, bolt; 12, clamping sleeve; 13, second water-swelling rubber strip; 2, annular air bag; 3, first water-swelling rubber strip; 31, waterproof rubber pad; 4, pipe with an orifice; 5, tunnel segment. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application are described below to facilitate the understanding of the present application for those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, as long as various changes are within the spirit and scope of the present application as defined and determined by the appended claims, these changes are obvious, and all applications created by the concept of the present application are within the scope of protection.

[0022] The prior art seals the pipe with an orifice 4 by traditional hemp silk winding or complex pressing device, which has high processing cost and low adaptability. In order to solve this problem, the present application realizes rapid installation by the cooperation of the fixing ring 1 and the bolt 11, replaces the traditional hemp silk winding or complex pressing device, and does not need to preform the components inside the segment, which can save the construction cost. At the same time, the physical adhesion of the annular air bag 2 and the wall surface of the tunnel segment 5 forms a preliminary sealing barrier, and the volume change of the first water-swelling rubber strip 3 after swelling in water fills the gap, forming a double dynamic sealing mechanism, which effectively improves the anti-leakage performance, while taking into account the low cost, high adaptability and long-term stability of the device, achieving the balance optimization of economy and sealing performance.

[0023] Specifically, the structure of a leakage-proof device for a pipe with an orifice can refer to Figure 1 and Figure 2 , which comprises a fixing ring 1, the fixing ring 1 is provided with a clamping sleeve 12 fixed on the pipe with an orifice 4, and the outer end surface of the clamping sleeve 12 is provided with a second water-swelling rubber strip 13 in the form of a ring. The clamping sleeve 12 is fixed on the pipe with an orifice 4, and the second water-swelling rubber strip 13 further seals the gap between the pipe with an orifice 4 and the fixing ring 1, preventing salt water from leaking along the pipe with an orifice 4 in the axial direction.

[0024] A plurality of bolt holes are formed on the annular surface of the fixing ring 1, and the plurality of bolts 11 are respectively threaded through the plurality of bolt holes and are screwed with the tunnel segment 5. An annular air bag 2 is arranged between the tunnel segment 5 and the fixing ring 1 and is attached to the wall surface of the tunnel segment 5. The outer ring of the annular air bag 2 is fixedly connected with the fixing ring 1, and a first water-swelling rubber strip 3 in the form of a ring is arranged between the annular air bag 2 and the fixing ring 1. The connecting end surface of the first water-swelling rubber strip 3 and the annular air bag 2 is provided with a waterproof rubber pad 31. The waterproof rubber pad 31 can further improve the sealing performance.

[0025] In this embodiment, the material of the annular air bag 2 is rubber. Rubber has elasticity and corrosion resistance, and can be attached to the pipe piece and adapt to the cryogenic liquid environment, prolonging the service life.

[0026] The material of the fixed ring 1 is metal. The metal material, such as stainless steel, provides sufficient structural strength to withstand the pre-tightening force of the bolt 11 and external load. The metal surface can be treated to prevent rust to avoid sealing failure caused by rust.

[0027] In order to more closely fit the tunnel pipe piece 5, the thickness of the annular air bag 2 gradually increases along the radial direction of the inner ring to the outer ring. And in order to facilitate fixed connection, the outer ring of the annular air bag 2 is provided with a bending section fixedly connected with the fixed ring 1.

[0028] A plurality of bolt holes are uniformly distributed on the fixed ring 1 in the circumferential direction. The circumferentially uniform bolt holes make the fixed ring 1 and the tunnel pipe piece 5 balanced in force, avoiding local stress too large to cause sealing failure.

[0029] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and changes made by those skilled in the art within the scope described in the claims are still within the protection scope of the patent.

Claims

1. An anti-extravasation device for an orifice tube, characterized in that, The utility model provides a tunnel pipe fixing device, which comprises a fixing ring (1) fixed on an orifice pipe (4), a plurality of bolt holes are formed on the ring surface of the fixing ring (1) and matched with a plurality of bolts (11), the plurality of bolts (11) are respectively screwed with a tunnel pipe piece (5) through the plurality of bolt holes, an annular air bag (2) is arranged between the tunnel pipe piece (5) and the fixing ring (1) and is attached to the wall surface of the tunnel pipe piece (5), the outer ring of the annular air bag (2) is fixedly connected with the fixing ring (1), and a first water-swelling rubber strip (3) in a ring shape is arranged between the annular air bag (2) and the fixing ring (1).

2. An anti-extravasation device for an orifice tube according to claim 1, wherein, A clamping sleeve (12) is arranged on the fixing ring (1) and fixed on the orifice pipe (4), and a second water-swelling rubber strip (13) in a ring shape is arranged on the outer end surface of the clamping sleeve (12).

3. An anti-extravasation device for an orifice tube according to claim 1, wherein The thickness of the annular air bag (2) gradually increases along the radial direction from the inner ring to the outer ring.

4. An anti-extravasation device for an orifice tube according to claim 3, wherein, A bending section is arranged at the outer ring of the annular air bag (2) and fixedly connected with the fixing ring (1).

5. An anti-extravasation device for an orifice tube according to claim 1, wherein, A waterproof rubber pad (31) is arranged on the connecting end surface of the first water-swelling rubber strip (3) and the annular air bag (2).

6. An anti-extravasation device for an orifice tube according to claim 1, wherein, The plurality of bolt holes are uniformly distributed on the fixing ring (1) along the circumferential direction.

7. An anti-extravasation device for an orifice tube according to any one of claims 1 to 6, wherein The material of the annular air bag (2) is rubber.

8. An anti-extravasation device for an orifice tube according to any one of claims 1 to 6, wherein The material of the fixing ring (1) is metal.

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