Low-temperature elbow pipe fitting

Abstract

The utility model relates to the technical field of elbow pipe fittings, in particular to a low-temperature elbow pipe fitting which comprises a main pipe body, a heat preservation sleeve is arranged on the outer wall of the main pipe body in a sleeved mode, limiting rings are arranged at the positions, close to the two ends, of the outer wall of the main pipe body, nut rings are arranged on the outer circles of the limiting rings in a sleeved mode, clamping rings are arranged at the positions, close to the two ends, of the outer wall of the main pipe body, and rubber rings are arranged in the clamping rings. An anticorrosive layer is arranged on the inner wall of the main pipe body; according to the low-temperature elbow pipe fitting, the heat preservation sleeve with the movable groove is arranged, low-temperature-resistant protection of the main pipe body is achieved, the nut ring moves in the movable groove, cleaning cooperation of the two ends of the outer wall of the main pipe body is facilitated, the shielding influence of the nut ring is reduced, and under cooperation of the limiting ring and the sealing gasket, the tightness of connection between the main pipe body and an external pipeline is improved; the nut ring is in threaded fit with an external thread on the outer wall of an external pipeline, the combined installation stability is improved, the nut ring is convenient to disassemble and fit, and the main pipe body is disassembled, replaced and matched.

Description

Technical Field

[0001] This utility model relates to the field of elbow pipe fittings technology, specifically a low-temperature elbow pipe fitting. Background Technology

[0002] Cryogenic pipe fittings refer to pipe fittings that can withstand low-temperature environments. Cryogenic pipe fittings include elbows, flanges, reducers, reducers, end caps, pipe caps, bends, etc. In piping systems, elbows are pipe fittings that change the direction of the pipeline. Cryogenic elbow fittings are pipe fittings that change the direction of the pipeline in low-temperature environments.

[0003] The utility model with announcement number CN216896328U discloses a bend joint for a low-temperature resistant flexible manifold, including a main pipe, a connecting pipe fixedly installed on the outside of the main pipe, an annular through groove opened on the outside of the connecting pipe, a limiting pipe fixedly installed on the outside of the main pipe and on the inside of the connecting pipe, an annular connector fixedly installed on the side of the limiting pipe away from the connecting pipe, an annular groove opened on the outside of the limiting pipe, and a sliding rod slidably connected to the inside of the annular through groove;

[0004] The above technical solution, by incorporating a sliding rod, a buffer spring, and a limiting rod, ensures that when the sliding rod pulls the pressure rod away from the connecting pipe, the limiting rod first compresses the buffer spring, subsequently driving the pressure rod to move. When the sliding rod pushes the pressure rod towards the limiting pipe, the limiting rod stretches the buffer spring and compresses the compression bladder. This allows the pressure rod to receive a good buffering force during movement, improving the stability and service life of the device. However, when the elbow fittings are combined with external pipelines at both ends, they are generally welded or fused together using a welding machine. When the pipeline needs to be replaced, the elbow fittings cannot be reused, and disassembly of the elbow fittings is not convenient. Furthermore, the elbow fittings cannot reduce the impact of the low external temperature environment on the internally conveyed materials. Utility Model Content

[0005] The purpose of this utility model is to provide a low-temperature elbow fitting to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A low-temperature elbow pipe fitting includes a main pipe body, an insulation sleeve on the outer wall of the main pipe body, a limiting ring near both ends on the outer wall of the main pipe body, a nut ring on the outer ring of each limiting ring, a retaining ring near both ends on the outer wall of the main pipe body, a rubber ring in the retaining ring, and an anti-corrosion layer on the inner wall of the main pipe body.

[0008] Furthermore, the outer diameter of the anti-corrosion layer is adapted to the inner diameter of the main pipe, and the outer wall of the anti-corrosion layer is bonded and fixed to the inner wall of the main pipe.

[0009] The corrosion layer is matched, the influence of the material conveyed in the main pipe body on the inner wall of the main pipe body is reduced, and the service life of the main pipe body is prolonged.

[0010] Specifically, the main pipe body is made of polyvinyl chloride material.

[0011] In the utility model, the cooperation of the arc-shaped edge helps the two ends of the main pipe body to be quickly inserted and matched with the external connecting pipeline, increases the stability of installation, and the polyvinyl chloride material enhances the heat resistance, toughness and ductility of the main pipe body, increases the corrosion resistance, and prolongs the overall service life.

[0012] It should be noted that the inner diameter of the heat preservation sleeve is matched with the outer diameter of the main pipe body, the main pipe body is adhesively fixed with the heat preservation sleeve, and the movable grooves are formed in the outer wall of the heat preservation sleeve close to the two ends.

[0013] In the utility model, the cooperation of the heat preservation sleeve helps to protect the main pipe body, reduces the influence of the low-temperature environment on the main pipe body, and protects the material passing through the main pipe body.

[0014] Further, the inner thread is formed in the inner wall of the nut ring, and the perforation is formed in the bottom of the nut ring and the corresponding position of the movable groove.

[0015] In the utility model, the cooperation of the nut ring and the inner thread helps to connect the outer thread on the outer wall of the external pipeline, realizes the fixed connection of the nut ring, the main pipe body and the external pipeline, and the nut ring is in the shape of hexagonal prism, which helps to be clamped and matched with the external tool wrench, facilitates stable rotation, realizes connection, installation or dismounting cooperation.

[0016] Specifically, the limiting ring is adhesively fixed with the main pipe body, the outer diameter of the limiting ring is matched with the inner diameter of the nut ring, and the limiting ring is slidably inserted and matched with the nut ring.

[0017] In the utility model, the cooperation of the limiting ring helps to limit the position of the nut ring, prevents the nut ring from being separated from the main pipe body, and helps the nut ring to be threadedly connected with the external pipeline under the cooperation of the limiting ring, and provides a force position.

[0018] It should be noted that the sealing gasket is arranged on one side of the limiting ring close to the end portion of the main pipe body, the width of the outer wall of the sealing gasket is matched with the width of the outer wall of the limiting ring, and the sealing gasket is inserted and matched with the main pipe body.

[0019] In the utility model, the sealing gasket is arranged on one side of the limiting ring close to the end portion of the main pipe body, the width of the outer wall of the sealing gasket is matched with the width of the outer wall of the limiting ring, and the sealing gasket is inserted and matched with the main pipe body.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] 1. The utility model discloses a heat preservation sleeve with a movable groove, which realizes low-temperature protection for the main pipe body, and the nut ring moves in the movable groove, which helps to clean the two ends of the outer wall of the main pipe body, reduces the blocking effect of the nut ring, and increases the tightness of the connection between the main pipe body and the external pipeline under the cooperation of the limiting ring and the sealing pad, the nut ring is screwed with the external threads on the outer wall of the external pipeline, which increases the stability of the combined installation, and the nut ring is convenient to disassemble and cooperate, which realizes the disassembly and replacement of the main pipe body.

[0022] 2. The utility model discloses a corrosion-resistant layer, which reduces the erosion of the conveying material on the inner wall of the main pipe body and prolongs the service life of the main pipe body, and further increases the tightness of the connection between the main pipe body and the external pipeline under the cooperation of the snap ring and the rubber ring, the two ends of the main pipe body are both matched with the arc-shaped edges, which helps to stably and quickly plug and install the external pipeline, the nut ring is a prism as a whole, which helps to be clamped and cooperated by the external tool wrench, and the nut ring is convenient to rotate, fix or disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic diagram of the utility model;

[0024] Figure 2 It is the elbow pipe fitting and pipeline connection combination schematic diagram of the utility model;

[0025] Figure 3 It is the main pipe body and rubber ring combination schematic diagram of the utility model;

[0026] Figure 4 It is the nut ring structure schematic diagram of the utility model;

[0027] Figure 5 It is the main pipe body and heat preservation sleeve combination schematic diagram of the utility model.

[0028] The meanings of various signs in the drawing are as follows:

[0029] 1, main pipe body;10, snap ring;100, rubber ring;11, limiting ring;110, sealing pad;12, corrosion-resistant layer;13, arc-shaped edge;

[0030] 2, heat preservation sleeve;20, movable groove;

[0031] 3, nut ring;30, internal thread;31, perforation. DETAILED DESCRIPTION

[0032] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, apparently, the described embodiment is only a part of the embodiment of the utility model, and is not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0033] Please refer to Figures 1-5 The embodiment provides a technical scheme:

[0034] A low-temperature elbow pipe fitting, comprising a main pipe body 1, a corrosion-resistant layer 12 is arranged on the inner wall of the main pipe body 1, the outer diameter of the corrosion-resistant layer 12 is matched with the inner diameter of the main pipe body 1, and the outer wall of the corrosion-resistant layer 12 is adhesively fixed with the inner wall of the main pipe body 1.

[0035] In the utility model, under the cooperation of the corrosion-resistant layer 12, the influence of the material conveyed inside on the inner wall of the main pipe body 1 is reduced, and the service life of the main pipe body 1 is prolonged.

[0036] Further, arc-shaped edges 13 are arranged at both ends of the main pipe body 1, and the main pipe body 1 is made of polyvinyl chloride.

[0037] In the utility model, under the cooperation of the arc-shaped edges 13, the two ends of the main pipe body 1 and the external connecting pipeline can be quickly and correspondingly inserted and matched, the stability of installation is increased, the polyvinyl chloride is made to enhance the heat resistance, toughness and ductility of the main pipe body 1, the corrosion resistance is increased, and the overall service life is prolonged.

[0038] Specifically, a heat preservation sleeve 2 is arranged on the outer wall of the main pipe body 1, the inner diameter of the heat preservation sleeve 2 is matched with the outer diameter of the main pipe body 1, the main pipe body 1 is adhesively fixed with the heat preservation sleeve 2, and movable grooves 20 are formed in the outer wall of the heat preservation sleeve 2 and close to both ends.

[0039] In the utility model, under the cooperation of the heat preservation sleeve 2, the main pipe body 1 can be protected, the influence of the low-temperature environment on the main pipe body 1 is reduced, and the material passing through the main pipe body 1 is protected.

[0040] It should be noted that limit rings 11 are arranged on the outer wall of the main pipe body 1 and close to both ends, nut rings 3 are arranged on the outer circle of the limit rings 11, internal threads 30 are formed in the inner wall of the nut rings 3, and through holes 31 are formed in the bottom of the nut rings 3 and correspond to the movable grooves 20.

[0041] In the utility model, under the cooperation of the nut rings 3 and the internal threads 30, the nut rings 3 are connected with external threads on the outer wall of the external pipeline, the nut rings 3 are fixedly connected with the main pipe body 1 and the external pipeline, the nut rings 3 as a whole are hexagonal prisms, the nut rings 3 can be clamped and matched with the external tool wrench, stable rotation is facilitated, and connection, installation or dismounting cooperation is realized.

[0042] Further, the limiting ring 11 is welded and fixed with the main pipe body 1, the outer diameter of the limiting ring 11 is matched with the inner diameter of the nut ring 3, and the limiting ring 11 is slidably inserted and matched with the nut ring 3.

[0043] In the utility model, the cooperation of the limiting ring 11 helps to limit the position of the movement of the nut ring 3, prevents the nut ring 3 from separating from the main pipe body 1, and meanwhile, the cooperation of the limiting ring 11 helps the nut ring 3 to be threadedly connected with the external pipeline, and provides a force application position.

[0044] Secondly, the snap ring 10 is arranged on the outer wall of the main pipe body 1 near the two ends, and the rubber ring 100 is arranged in the snap ring 10.

[0045] It is worth supplementing that the sealing gasket 110 is arranged on one side of the limiting ring 11 near the end of the main pipe body 1, the width of the outer wall of the sealing gasket 110 is matched with the width of the outer wall of the limiting ring 11, and the sealing gasket 110 is inserted and matched with the main pipe body 1.

[0046] In the utility model, the sealing gasket 110 is arranged to increase the tightness of the adhesion with the end of the external pipeline, reduce the influence of the water or air leakage at the joint, the rubber ring 100 is inserted and matched with the snap ring 10, the rubber ring 100 increases the contact area of the adhesion with the inner wall of the external pipeline, and further increases the sealing property of the joint.

[0047] In use of the low-temperature elbow pipe fitting, the user first adhesively matches the heat preservation sleeve 2 with the movable groove 20 with the main pipe body 1 with the anticorrosive layer 12, then inserts and matches the rubber ring 100 with the snap ring 10, manually sets the nut ring 3 with the internal thread 30 in the movable groove 20, and inserts and matches the nut ring 3 with the limiting ring 11, inserts and matches the two sealing gaskets 110 with the outer wall of the main pipe body 1, and adhesively matches the sealing gasket 110 with the limiting ring 11.

[0048] When the two ends of the main pipe body 1 need to be combined and connected with the external pipeline, one end with the arc-shaped edge 13 is inserted and matched with the end of the external pipeline, the nut ring 3 is manually moved to the outer end of the main pipe body 1, and the nut ring 3 is inserted on the external pipeline and is threadedly connected through the external thread and the internal thread 30, the rubber ring 100 increases the tight adhesion of the outer wall of the end of the main pipe body 1 with the external pipeline, and reduces the influence of the water or air leakage at the joint under the cooperation of the sealing gasket 110, when the main pipe body 1 needs to be disassembled and replaced, the nut ring 3 is disassembled through the wrench, and under the cooperation of the heat preservation sleeve 2, the freezing and cracking damage of the main pipe body 1 caused by the low temperature of the external environment is reduced, and the influence of the low temperature of the external environment on the conveyed material is reduced.

Claims

1. A cryogenic elbow pipe fitting comprising a main pipe body (1), characterized in that: The outer wall of the main pipe body (1) is sleeved with a heat preservation sleeve (2), the outer wall of the main pipe body (1) is provided with a limiting ring (11) near both ends, the outer ring of the limiting ring (11) is sleeved with a nut ring (3), the outer wall of the main pipe body (1) is provided with a snap ring (10) near both ends, the snap ring (10) is provided with a rubber ring (100), and the inner wall of the main pipe body (1) is provided with a corrosion-proof layer (12).

2. Cryogenic elbow fitting according to claim 1, characterized in that: The outer diameter of the corrosion-proof layer (12) is matched with the inner diameter of the main pipe body (1), and the outer wall of the corrosion-proof layer (12) is adhesively fixed with the inner wall of the main pipe body (1).

3. Cryogenic elbow fitting according to claim 1, characterized in that: The two ends of the main pipe body (1) are provided with arc edges (13), and the main pipe body (1) is made of polyvinyl chloride material.

4. The cryogenic elbow fitting of claim 1, wherein: The inner diameter of the heat preservation sleeve (2) is matched with the outer diameter of the main pipe body (1), the main pipe body (1) and the heat preservation sleeve (2) are adhesively fixed, and the outer wall of the heat preservation sleeve (2) is provided with a movable groove (20) near both ends.

5. Cryogenic elbow fitting according to claim 4, characterized in that: The inner wall of the nut ring (3) is provided with an internal thread (30), and the bottom of the nut ring (3) is provided with a through hole (31) corresponding to the movable groove (20).

6. The cryogenic elbow fitting of claim 1, wherein: The limiting ring (11) is adhesively fixed with the main pipe body (1), the outer diameter of the limiting ring (11) is matched with the inner diameter of the nut ring (3), and the limiting ring (11) is slidably inserted into the nut ring (3).

7. The cryogenic elbow fitting of claim 1, wherein: One side of the limiting ring (11) near the end of the main pipe body (1) is provided with a sealing gasket (110), the width of the outer wall of the sealing gasket (110) is matched with the width of the outer wall of the limiting ring (11), and the sealing gasket (110) is inserted into the main pipe body (1).

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