Quick-opening locking sealing device for narrow space

Abstract

The utility model provides a quick-opening locking sealing device for a narrow space, which comprises a first flange and a second flange, and locking devices are arranged outside flanges of the first flange and the second flange and used for limiting relative displacement of the first flange and the second flange. The locking device comprises a locking body, a locking piece, a locking sleeve and a limiting device, the locking piece and the locking sleeve are arranged at the two ends of the locking body respectively, and the locking piece penetrates through the locking sleeve to be connected with the limiting device; and the sections of the locking piece and the locking sleeve are T-shaped. Flange bolt connection is changed into flange external locking device connection, alignment precision and difficulty of bolt holes during assembly are reduced, the expansion joint can be well applied to installation of a corrugated pipe expansion joint, pipeline accessories and equipment in a narrow space, construction and installation difficulty is reduced, the requirement for the installation space is small, and disassembly is convenient; the expansion joint of the corrugated pipe and pipeline accessories are convenient to overhaul and replace; meanwhile, the whole locking device is simple in structure, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joint installation, in particular to a quick-opening locking sealing device used in a narrow space. Background Art

[0002] There are two main ways to connect bellows expansion joints to pipe accessories and equipment: one is flange connection; the other is welding. The welds at the connection between the bellows expansion joint and the pipe need to be welded on site, and the welding quality is difficult to control. In addition, the welds are prone to rust, corrosion and cracking under long-term use. In order to facilitate disassembly, maintenance and replacement, flange connections are often used at both ends of the bellows expansion joint and pipe accessories and equipment. Flanges are usually connected with bolts and nuts. This method is the earliest and most mature, and has a good sealing effect. However, it occupies a large space, has a complex structure, and has low docking accuracy during the actual installation process. When connecting, one end of the flange joint needs to be fixed, and the other end of the flange joint can be rotated, and multiple bolts need to be tightened at the same time. The auxiliary equipment for connection is complex, large in size, and takes a long time to install.

[0003] For bellows expansion joints and pipe accessories that require quick disassembly for inspection and replacement due to limited installation space, bolt connections are used. There are a large number of parts, which is not only inconvenient to operate, but also prone to loose tightening, resulting in low construction efficiency. Summary of the invention

[0004] In view of this, the utility model aims to provide a quick-open locking sealing device for a narrow space to solve the problem of quickly connecting pipelines in a narrow space.

[0005] The technical solution of the utility model is implemented as follows: a quick-open locking sealing device for a narrow space, comprising a first flange and a second flange, wherein the first flange is arranged at one end of an expansion joint, and the second flange is arranged at one end of a pipeline adjacent to the expansion joint, and locking devices are arranged outside the flanges of the first flange and the second flange for limiting the relative displacement of the first flange and the second flange; the locking device comprises a locking body, a locking member, a locking sleeve and a limiting device, wherein the locking member and the locking sleeve are respectively arranged at two ends of the locking body, and the locking member passes through the locking sleeve to connect the limiting device; the cross-sections of the locking member and the locking sleeve are T-shaped.

[0006] Furthermore, the locking body is in the shape of a long strip or a ring, and one side of the locking body is connected to a limiting pipe fitting for limiting the relative displacement of the first flange and the second flange; a locking connecting part is provided at the end of the locking body for respectively connecting the locking piece and the locking sleeve.

[0007] Furthermore, a groove is provided at one end of the limiting pipe member away from the locking body, the groove width is L1, the flange thickness of the first flange and the second flange is L2, and L1>L2.

[0008] Furthermore, the cross-section of the limiting pipe is trapezoidal, V-shaped or semicircular.

[0009] Furthermore, a threaded portion is provided on the outer diameter of the end portion of the locking member.

[0010] Furthermore, the locking sleeve is provided with a second through hole and a third through hole inside, and the second through hole and the third through hole are perpendicular to each other.

[0011] Furthermore, the limiting device includes a gasket and at least one nut.

[0012] Furthermore, the plurality of nuts are set to have different thicknesses, and the nuts of adjacent gaskets have a smaller thickness.

[0013] Furthermore, sealing rings are provided on the sealing surfaces of the first flange and the second flange to prevent leakage of the medium.

[0014] Furthermore, a sealing device is provided between the locking device and the flange of the first flange, and between the locking device and the flange of the second flange.

[0015] Compared with the prior art, the quick-open locking sealing device for a narrow space of the utility model has the following advantages:

[0016] 1. The utility model changes the flange bolt connection into a flange external locking device connection, which reduces the alignment accuracy and difficulty of the bolt holes during assembly, and can be well applied to the installation of bellows expansion joints and pipeline accessories and equipment in narrow spaces, reduces the difficulty of construction and installation, and realizes the requirement of rapid installation of pipelines in narrow spaces.

[0017] 2. The utility model adopts the installation method of locking ring so that the number of bolts is reduced from multiple to one, which reduces the space occupied by the connection. The locking device requires little installation space and is easy to disassemble, which is not only convenient for the inspection and replacement of bellows expansion joints and pipeline accessories; at the same time, the overall locking device has a simple structure and is safe and reliable.

[0018] 3. The T-shaped cross-section of the locking piece and the locking sleeve of the utility model not only facilitates the connection with the locking body, but also prevents the parts from being scattered and falling, which helps to improve the efficiency of on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the connection structure between the expansion joint and the pipeline in the prior art;

[0021] Figure 2 This is a schematic diagram of the structure of the tight sealing device of the utility model;

[0022] Figure 3 Front view of the medium-tight sealing device of the utility model;

[0023] Figure 4 A cross-sectional view of the utility model's mid-tight sealing device;

[0024] Figure 5 Front view of the locking member in the utility model;

[0025] Figure 6 A left view of the locking member in the utility model;

[0026] Figure 7 Front view of the locking sleeve in the utility model;

[0027] Figure 8 The left side view of the locking sleeve in the utility model;

[0028] Fig. 9 A cross-sectional view of the locking pipe fitting in the utility model;

[0029] Description of reference numerals:

[0030] 1. First flange; 2. Second flange; 3. Expansion joint; 4. Pipeline; 5. Locking device; 501. Locking body; 502. Locking piece; 5021. Threaded portion; 503. Locking sleeve; 5031. Second through hole; 5032. Third through hole; 504. Limiting device; 5041. Gasket; 5042. Nut; 505. Limiting pipe fitting; 5051. Groove; 506. Locking connection portion; 5061. Boss; 5062. First through hole; 6. Sealing ring; 7. Sealing device. DETAILED DESCRIPTION

[0031] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0032] It should be noted that all terms used in the present invention to indicate direction and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative position relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The utility model discloses a quick-open locking sealing device for a narrow space, comprising a first flange 1 and a second flange 2, wherein the first flange 1 is arranged at one end of an expansion joint 3, and the second flange 2 is arranged at one end of a pipeline 4 adjacent to the expansion joint 3, and a locking device 5 is arranged outside the flanges of the first flange 1 and the second flange 2, for limiting the relative displacement of the first flange 1 and the second flange 2; the locking device 5 comprises a locking body 501, a locking piece 502, a locking sleeve 503 and a limiting device 504, the locking piece 502 and the locking sleeve 503 are respectively arranged at two ends of the locking body 501, and the locking piece 502 passes through the locking sleeve 503 to connect the limiting device 504; the cross-sections of the locking piece 502 and the locking sleeve 503 are T-shaped.

[0036] This setting changes the flange bolt connection into a flange external locking device 5 connection, which reduces the alignment accuracy and difficulty of the bolt holes during assembly, and can be well applied to the installation of bellows expansion joints 3 and pipeline 4 accessories and equipment in a narrow space, which not only reduces the difficulty of construction and installation, but also has a small installation space requirement, convenient disassembly, and is convenient for the inspection and replacement of bellows expansion joints and pipeline 4 accessories; at the same time, the overall locking device 5 has a simple structure and is safe and reliable; the installation method of the locking device 5 reduces the number of bolt connections from multiple to one, reduces the space occupied by the connection, reduces the difficulty of construction and installation, has a small installation space requirement, is convenient for disassembly, and improves the installation efficiency; the T-shaped cross-section of the locking member 502 and the locking sleeve 503 is convenient for connection with the locking body 501, and avoids the scattering and falling of parts, which helps to improve the on-site construction efficiency.

[0037] Specifically, the locking body 501 is in the shape of a long strip or a ring, and one side of the locking body 501 is connected to a limiting pipe 505 for limiting the relative displacement of the first flange 1 and the second flange 2; the end of the locking body 501 is provided with a locking connection portion 506 for respectively connecting the locking member 502 and the locking sleeve 503. This arrangement enables the locking body 501 to adjust the locking degree according to the diameter of the pipe 4, expand the adaptability of the retracting device 5, and reduce the requirements for the accuracy of flange installation.

[0038] Specifically, the locking body 501 and the limiting pipe 505 are welded, riveted or integrally formed.

[0039] Specifically, a groove 5051 is provided at one end of the limiting pipe 505 away from the locking body 501, the width of the groove 5051 is L1, the flange thickness of the first flange 1 and the second flange 2 is L2, and L1>L2. The limiting pipe 505 is provided with a groove 5051 on one side, which can accommodate the flanges of the first flange 1 and the second flange 2, and limit the axial displacement of the first flange 1 and the second flange 2.

[0040] Preferably, the cross section of the position-limiting pipe 505 is a trapezoid. The cross-sectional shape of the groove 5051 is set to help the two sides of the groove 5051 to apply opposite axial forces under the pressure of the locking body 501, and the two forces act on the first flange 1 and the second flange 2 respectively, thereby improving the sealing of the flange connection and reducing the risk of leakage; at the same time, the trapezoidal shape expands the connection area between the position-limiting pipe 505 and the locking body 501, which helps to improve the reliability and stability of the connection.

[0041] Preferably, the cross section of the position limiting pipe 505 is V-shaped or semicircular. This arrangement has a simple structure, is easy to process, has a narrow bottom width direction, saves materials, and reduces weight.

[0042] Specifically, a limit block is provided on the inner wall upper edge of the groove 5051 to prevent the locking device 5 from loosening due to vibration. This arrangement enables the locking device 5 to adapt to vibration conditions and prevents the first flange 1 and the second flange 2 from being offset and escaping from the groove 5051 due to the vibration of the pipeline 4.

[0043] Specifically, the width L1 of the groove 5051 is adjustable.

[0044] Specifically, an adjustment rod is provided in the radial direction in the middle of the groove 5051, and an adjustment block is provided at the end of the adjustment rod, and the cross section of the adjustment block is conical or triangular. The groove 5051 structure can adjust the width L1 of the groove 5051, so that the groove 5051 is more tightly combined with the flanges of the first flange 1 and the second flange 2, thereby ensuring the reliability and stability of the connection.

[0045] Specifically, a plurality of position limiting pipes 505 are provided, and the position limiting pipes 505 are evenly distributed on the locking body 501. The provision of the position limiting pipes 505 makes the locking body 501 less rigid, capable of greater deformation, and adapting to the connection of pipes 4 with more specifications and diameters; at the same time, the weight of the locking device 5 is reduced, which helps to increase the installation speed and reduce the production cost.

[0046] Preferably, three limiting pipe members 505 are provided.

[0047] Specifically, the locking connection portion 506 forms a clamping structure with the locking member 502. This arrangement makes the connection structure more concise and easy to install, which helps to increase the construction speed and facilitates the maintenance and replacement of the bellows expansion joint 3 and the accessories of the pipeline 4.

[0048] Specifically, two collars are provided on the locking connection portion 506. This arrangement has a simple connection structure, is easy to process, and is quick to install, which helps to increase the construction speed, reduce the production cost, and facilitate the maintenance and replacement of the bellows expansion joint 3 and the pipe 4 accessories.

[0049] Specifically, the locking connection part 506 is provided with two parallel bosses 5061, and the side of the boss 5061 is provided with a first through hole 5062 for clamping the locking member 502. This setting has a simple connection structure, convenient processing, and quick installation, which helps to improve the construction speed, reduce the production cost, and facilitate the maintenance and replacement of the bellows expansion joint 3 and the accessories of the pipeline 4.

[0050] Specifically, the cross section of the locking member 502 is T-shaped, and the outer diameter of the end of the locking member 502 is provided with a threaded portion 5021. This arrangement is simple in structure and convenient in processing, which helps to increase the construction speed, install quickly, reduce production costs, and facilitate the maintenance and replacement of the bellows expansion joint 3 and the pipe 4 accessories.

[0051] Preferably, the locking member 502 is a hollow structure, which can save materials, reduce weight and reduce costs.

[0052] Preferably, the locking member 502 is a T-bolt. This arrangement uses standard parts to help reduce production costs.

[0053] Specifically, the locking sleeve 503 is provided with a second through hole 5031 and a third through hole 5032, and the second through hole 5031 is perpendicular to the third through hole 5032. The locking sleeve 503 is provided with this configuration to save materials, reduce the weight of the parts, and help reduce production costs.

[0054] Specifically, the limiting device 504 includes a washer 5041 and at least one nut 5042. This arrangement uses two nuts 5042 and a washer 5041 for limiting connection, which helps to reduce the risk of tripping and improve the reliability and stability of the connection.

[0055] Specifically, multiple nuts 5042 are set to have different thicknesses, and the thickness of the nuts 5042 adjacent to the gaskets 5041 is smaller. This setting uses nuts 5042 of different thicknesses, and the nut 5041 used at one end close to the gasket 5041 is smaller in thickness, bears a smaller load, and reduces the risk of stripping, and the nut 5041 used at the outer end is thicker to prevent the nut 5042 from loosening; it helps to reduce the overall weight and reduce production costs.

[0056] Specifically, the nut 5042 is connected to the threaded portion 5021. The threaded connection can adjust the pre-tightening force of the locking device 5, realize the connection of pipe diameters 4 of various specifications, and improve the adaptability of the locking device 5.

[0057] Specifically, the sealing surfaces of the first flange 1 and the second flange 2 are provided with sealing rings 6 to prevent leakage of the medium. This arrangement helps to improve the overall sealing performance of the locking device 5 and reduce the risk of leakage.

[0058] Preferably, the sealing ring 6 is an O-ring. This arrangement helps to reduce production costs.

[0059] Specifically, a sealing device 7 is provided between the locking device 5 and the flange of the first flange 1, and between the locking device 5 and the flange of the second flange 2. This arrangement helps to further improve the overall sealing performance of the locking device 5 and reduce the risk of leakage.

[0060] Preferably, the sealing device 7 is a locking sealing gasket.

[0061] Example 1

[0062] like Figure 2As shown, the expansion joint 3 and the pipeline 4 are connected by the first flange 1 and the second flange 2. The sealing ring 6 is an O-ring and is installed on the groove of the flange sealing surface. The locking device 5 is mounted on the outer side of the flange. The sealing device 7 is installed between the locking device 5 and the flange surface. The sealing ring 6 and the sealing device 7 both play a sealing role. The locking member 502 is a T-bolt, which is fixed to one end of the locking body 501. The end with a thread passes through the locking sleeve 503 and is connected to the other end of the locking body 501. A gasket 5041 is installed between the nut 5042 and the locking sleeve 503. Double nut sealing is adopted. The two nuts have different thicknesses. A thin nut is used at the end close to the gasket to bear a smaller load and reduce the risk of stripping. A thick nut is used at the outer end to prevent the nut from loosening.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick-open locking sealing device for use in a narrow space, comprising a first flange (1) and a second flange (2), wherein the first flange (1) is arranged at one end of an expansion joint (3), and the second flange (2) is arranged at one end of a pipeline (4) adjacent to the expansion joint (3), characterized in that: A locking device (5) is provided outside the flanges of the first flange (1) and the second flange (2) for limiting the relative displacement of the first flange (1) and the second flange (2); The locking device (5) comprises a locking body (501), a locking piece (502), a locking sleeve (503) and a limiting device (504); the locking piece (502) and the locking sleeve (503) are respectively arranged at two ends of the locking body (501); the locking piece (502) passes through the locking sleeve (503) and is connected to the limiting device (504); The locking piece (502) and the locking sleeve (503) have T-shaped cross-sections.

2. The quick-opening locking sealing device for narrow spaces according to claim 1, characterized in that: The locking body (501) is in the shape of a long strip or a ring. One side of the locking body (501) is connected to a limiting pipe member (505) for limiting the relative displacement of the first flange (1) and the second flange (2). The end of the locking body (501) is provided with a locking connection portion (506) for respectively connecting the locking member (502) and the locking sleeve (503).

3. The quick-opening locking sealing device for narrow spaces according to claim 2, characterized in that: A groove (5051) is provided at one end of the limiting pipe member (505) away from the locking body (501), the groove (5051) has a width of L1, and the flange thickness of the first flange (1) and the second flange (2) is L2, where L1>L2.

4. The quick-opening locking sealing device for narrow spaces according to claim 2, characterized in that: The cross section of the limiting pipe member (505) is trapezoidal, V-shaped or semicircular.

5. The quick-opening locking sealing device for narrow spaces according to claim 4, characterized in that: The outer diameter of the end portion of the locking piece (502) is provided with a threaded portion (5021).

6. The quick-opening locking sealing device for narrow spaces according to claim 5, characterized in that: The locking sleeve (503) is provided with a second through hole (5031) and a third through hole (5032) inside, and the second through hole (5031) and the third through hole (5032) are perpendicular to each other.

7. The quick-opening locking sealing device for narrow spaces according to claim 6, characterized in that: The limiting device (504) comprises a gasket (5041) and at least one nut (5042).

8. The quick-opening locking sealing device for narrow spaces according to claim 7, characterized in that: The plurality of nuts (5042) are configured to have different thicknesses, and the nuts (5042) adjacent to the gaskets (5041) have a smaller thickness.

9. The quick-opening locking sealing device for narrow spaces according to claim 8, characterized in that: The sealing surfaces of the first flange (1) and the second flange (2) are provided with sealing rings (6) for preventing leakage of the medium.

10. The quick-opening locking sealing device for narrow space according to claim 1, characterized in that: A sealing device (7) is provided between the locking device (5) and the flange of the first flange (1), and between the locking device (5) and the flange of the second flange (2).

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