Waveform expansion joint of pressure vessel

Abstract

The utility model relates to the technical field of expansion joints, in particular to a pressure vessel corrugated expansion joint which comprises an expansion joint body, a sealing assembly and a detector, the expansion joint body comprises a corrugated pipe and connecting flanges on the two sides of the corrugated pipe, and the two sets of connecting flanges are connected with corresponding joints of a pressure vessel through a plurality of sets of connecting bolts. The sealing assembly comprises two sets of sealing covers and a soft sealing cylinder, the sealing covers and the soft sealing cylinder are arranged on the outer sides of the connecting flange and the connector, the close sides of the two sets of sealing covers are connected with the two ends of the soft sealing cylinder through fixing pieces in a pressing mode, and the detector is installed in the sealing covers. According to the utility model, the two groups of sealing covers and the soft sealing cylinder are designed to seal the expansion joint body, and leakage detection is carried out in the two groups of sealing covers and the soft sealing cylinder, so that the leakage detection efficiency of personnel is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to a corrugated expansion joint for a pressure vessel. Background Art

[0002] A corrugated expansion joint, also known as a corrugated compensator, is composed of one or more bellows and structural components, and is used to absorb the dimensional changes of pipelines and equipment caused by reasons such as thermal expansion and cold contraction. Due to the relatively high internal pressure of existing pressure vessels, after the corrugated expansion joint is installed, it is necessary to regularly inspect the two ends and the bellows components for leaks.

[0003] Currently, since the corrugated expansion joint is often directly exposed to the environment, personnel need to spend a lot of time and energy during maintenance, and the leak detection efficiency is relatively low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a corrugated expansion joint for a pressure vessel, which is used to solve the problem that currently, since the corrugated expansion joint is often directly exposed to the environment, personnel need to spend a lot of time and energy during maintenance, and the leak detection efficiency is relatively low.

[0005] To achieve the above purpose, the utility model provides a corrugated expansion joint for a pressure vessel, including:

[0006] An expansion joint body, which includes a bellows and connecting flanges on both sides of the bellows. The two groups of connecting flanges are connected to the corresponding joints of the pressure vessel through multiple groups of connecting bolts;

[0007] A sealing assembly, including two groups of sealing covers and a soft sealing cylinder. The sealing cover includes two groups of sealing half-rings. The sealing cover is used to arrange the soft sealing cylinder outside the connecting flange and the joint. A clamping and fixing part for clamping outside the connecting flange and the joint is arranged inside the sealing cover. An external communication port adapted to the outer wall of the joint is arranged on one side of the sealing cover. A sealing ring is installed at the external communication port. An internal connection port larger than the radial dimension of the bellows is arranged on the other side of the sealing cover. A fixing ring is coaxially installed at the internal connection port. The soft sealing cylinder is sleeved outside the bellows, and both ends of the soft sealing cylinder are tightly connected to the outside of the fixing ring through fixing parts;

[0008] A detector, installed inside the sealing cover.

[0009] As a further scheme of the utility model, one end of the two groups of sealing half-rings is rotatably connected, and the other end is fixedly connected through a fixing bolt. An installation plate for installing the fixing bolt is arranged at the end of the sealing half-ring.

[0010] As a further scheme of the utility model, the fixing ring includes two groups of fixing half-rings, and the two groups of fixing half-rings are fixedly installed at the external communication ports of the corresponding sealing half-rings.

[0011] As a further solution of the present utility model, the fixing member is a fastening hoop.

[0012] As a further solution of the present utility model, the clamping and fixing member includes two groups of clamping plates and a double-headed screw rod. The two groups of clamping plates are slidably installed in the inner cavity of the sealing cover. The double-headed screw rod is rotatably installed in the inner cavity of the sealing cover, and one end thereof extends out of the sealing cover. The threaded portions symmetrically arranged on both sides of the double-headed screw rod form a screw pair drive with the ends of the corresponding clamping plates, and the connecting flange and the joint are clamped on both sides by the two groups of clamping plates.

[0013] Compared with the prior art, in the present utility model, two sealing covers and a soft sealing cylinder are hermetically fixed outside the expansion valve body. The two sealing covers seal the connection positions of the connecting flange and the joint, and the soft sealing cylinder seals the corrugated pipe. When a leakage occurs in the expansion joint body during long-term use, the leakage medium can be detected in time by the detector in the sealing cover, greatly improving the leak detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a corrugated expansion joint of a pressure vessel according to the present utility model.

[0015] Figure 2 For the present utility model Figure 1 An enlarged schematic view of part A.

[0016] Figure 3 It is a schematic structural diagram of the sealing cover of the present utility model.

[0017] In the drawings: 1, corrugated pipe; 2, connecting flange; 3, joint; 4, clamping and fixing member; 401, clamping plate; 402, double-headed screw rod; 5, sealing cover; 501, sealing semi-ring; 502, fixing ring; 503, mounting plate; 504, fixing bolt; 6, detector; 7, soft sealing cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present utility model will be further described in detail below in conjunction with the specific embodiments.

[0019] As shown in Figure 1 and Figure 3As shown, in the embodiment of the present utility model, a corrugated expansion joint for a pressure vessel includes an expansion joint body, which includes a corrugated pipe 1 and connecting flanges 2 on both sides of the corrugated pipe 1. The two groups of connecting flanges 2 are connected to the corresponding joints 3 of the pressure vessel through multiple groups of connecting bolts; a sealing assembly, including two groups of sealing covers 5 and a soft sealing cylinder 7. The sealing cover 5 includes two groups of sealing half-rings 501. The sealing cover 5 is used to arrange the soft sealing cylinder 7 on the outer sides of the connecting flange 2 and the joint 3. A clamping and fixing member 4 for clamping on the outer sides of the connecting flange 2 and the joint 3 is arranged inside the sealing cover 5. An outer communication port adapted to the outer wall of the joint 3 is arranged on one side of the sealing cover 5, and a sealing ring is installed at the outer communication port. An inner connection port larger than the radial dimension of the corrugated pipe 1 is arranged on the other side of the sealing cover 5, and a fixing ring 502 is coaxially installed at the inner connection port. The soft sealing cylinder 7 is sleeved on the outer side of the corrugated pipe 1, and both ends of it are tightly connected to the outer side of the fixing ring 502 through fixing members; a detector 6 is installed inside the sealing cover 5;

[0020] In the present utility model, by designing two groups of sealing covers 5 and a soft sealing cylinder 7, the connection positions of the connecting flange 2 and the joint 3 are sealed by the two groups of sealing covers 5. The two ends of the soft sealing cylinder 7 are fixedly connected to the adjacent sides of the sealing covers 5 to seal the corrugated pipe 1. When a leakage port occurs during the long-term use of the expansion joint body, the leakage medium can be detected in time by the detector 6 inside the sealing cover 5, greatly improving the leakage detection efficiency.

[0021] As Figure 1 and Figure 3 shown, in the embodiment of the present utility model, one end of the two groups of sealing half-rings 501 is rotatably connected, and the other end is fixedly connected through a fixing bolt 504. An installation plate 503 for installing the fixing bolt 504 is arranged at the end of the sealing half-ring 501. Of course, in actual use, other fixing structures can also be preferably used to fix the movable end of the sealing half-ring 501, such as a locking structure can be selected.

[0022] As Figure 1 and Figure 3 shown, in the embodiment of the present utility model, the fixing ring 502 includes two groups of fixing half-rings, and the two groups of fixing half-rings are fixedly installed at the outer communication ports of the corresponding sealing half-rings 501;

[0023] At the same time, the fixing member is a fastening hoop, and a groove for clamping the fastening hoop is arranged on the outer side of the fixing ring 502.

[0024] As Figure 2As shown, in the embodiment of the present utility model, the clamping and fixing member 4 includes two groups of clamping plates 401 and a double-headed screw rod 402. The two groups of clamping plates 401 are slidably installed in the inner cavity of the sealing cover 5. The double-headed screw rod 402 is rotatably installed in the inner cavity of the sealing cover 5, and one end thereof extends out of the sealing cover 5. The threaded portions symmetrically arranged on both sides of the double-headed screw rod 402 form a helical pair drive with the ends of the corresponding clamping plates 401. The two groups of clamping plates 401 clamp on both sides of the connecting flange 2 and the joint 3. During the process of fixing the sealing cover 5 in the present utility model, by rotating the double-headed screw rod 402, the two groups of clamping plates 401 are driven to approach symmetrically and clamp on both sides of the connecting flange 2 and the joint 3, thereby avoiding the displacement and sliding of the sealing cover 5 after installation and assisting in positioning the sealing cover 5.

[0025] In summary, in the present utility model, two groups of sealing covers 5 and soft sealing cylinders 7 are hermetically fixed outside the expansion valve body. The two groups of sealing covers 5 seal the connection positions of the connecting flange 2 and the joint 3, and the soft sealing cylinder 7 seals the corrugated pipe 1. When a leakage occurs in the expansion joint body during long-term use, the leakage medium can be detected in time by the detector 6 in the sealing cover 5, greatly improving the efficiency of leak detection.

[0026] The above has described the preferred embodiments of the present utility model in detail. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. A corrugated expansion joint for a pressure vessel, characterized in that, Comprising: An expansion joint body, which includes a corrugated pipe and connecting flanges on both sides of the corrugated pipe, and the two groups of connecting flanges are connected to the corresponding joints of the pressure vessel through multiple groups of connecting bolts; A sealing assembly, including two groups of sealing covers and a soft sealing cylinder, the sealing cover includes two groups of sealing half-rings, the sealing cover is used to arrange the soft sealing cylinder on the outer sides of the connecting flange and the joint, a clamping and fixing member for clamping on the outer sides of the connecting flange and the joint is arranged in the sealing cover, an outer communication port adapted to the outer wall of the joint is arranged on one side of the sealing cover, a sealing ring is installed at the outer communication port, an inner connection port larger than the radial dimension of the corrugated pipe is arranged on the other side of the sealing cover, a fixing ring is coaxially installed at the inner connection port, the soft sealing cylinder is sleeved on the outer side of the corrugated pipe, and both ends thereof are tightly connected to the outside of the fixing ring through fixing members; A detector, installed in the sealing cover.

2. The bellows expansion joint of a pressure vessel according to claim 1, wherein, One end of the two groups of sealing half-rings is rotatably connected, and the other end is fixedly connected through a fixing bolt, and an installation plate for installing the fixing bolt is arranged at the end of the sealing half-ring.

3. A corrugated expansion joint for a pressure vessel according to claim 1, characterized in that, The fixing ring includes two groups of fixing half-rings, and the two groups of fixing half-rings are fixedly installed at the outer communication ports of the corresponding sealing half-rings.

4. A corrugated expansion joint for a pressure vessel according to claim 1, characterized in that, The fixing member is a fastening hoop.

5. A corrugated expansion joint for a pressure vessel according to claim 1, wherein, The clamping and fixing member includes two groups of clamping plates and a double-headed screw rod, the two groups of clamping plates are slidably installed in the inner cavity of the sealing cover, the double-headed screw rod is rotatably installed in the inner cavity of the sealing cover, one end of which extends out of the sealing cover, and the threaded portions mirror-symmetrically arranged on both sides of the double-headed screw rod form a screw pair transmission with the ends of the corresponding clamping plates, and the two groups of clamping plates clamp on both sides of the connecting flange and the joint.

Images