Flange pipe fitting

Abstract

The flange pipe fitting comprises a pipe body, the outer portion of the pipe body communicates with a pressure relief pipe, an opening and closing pipe is arranged in the pipe body in the medium flowing direction in a sliding mode, and the outer side wall of the opening and closing pipe is attached to the inner side wall of the pipe body; a pressure relief spring is further arranged in the pipe body and stretches out and draws back in the sliding direction of the opening and closing pipe. The pressure relief spring is used for pushing the opening and closing pipe to move in the direction away from the pressure relief pipe, a flow baffle is arranged on the side wall, facing the medium flowing direction, of the opening and closing pipe, a plurality of through holes sequentially distributed at intervals are formed in the flow baffle in a penetrating mode, and pressure relief holes are formed in the outer circumferential face of the opening and closing pipe in a penetrating mode. The pressure relief pipe is located on a sliding path of the pressure relief hole. The flange pipe fitting has the advantages that adverse effects on the pipe body due to change of medium flow can be reduced, and structural stability of the flange pipe fitting is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of pipe fittings, and in particular to a flange pipe fitting. Background Art

[0002] Flanges are currently used as connecting components in piping systems, primarily for removable connections between pipes and between pipes and other equipment (such as valves and pumps). Flanges are widely used in petrochemicals, water treatment, heating systems, natural gas transportation, and other fields.

[0003] In the related art, when the medium flow rate flowing into the flange pipe fitting suddenly increases, the corresponding pressure on the flange pipe fitting will also increase accordingly. Excessive medium pressure will have a greater impact on the flange pipe fitting, such as causing leakage at the connection of the flange pipe fitting, rupture of the side wall of the flange pipe fitting, failure of the seal, and other adverse effects. Utility Model Content

[0004] The present application provides a flange pipe fitting, which can effectively alleviate the adverse effects on the flange pipe fitting caused by a sudden increase in medium flow, and ensure the stability of the flange pipe fitting structure.

[0005] The flange pipe fitting provided in this application adopts the following technical solution:

[0006] A flange pipe fitting comprises a pipe body, the outside of the pipe body is connected to a pressure relief pipe, an opening and closing pipe is slidingly arranged in the pipe body along the flow direction of the medium, the outer wall of the opening and closing pipe is in contact with the inner wall of the pipe body, and the opening and closing pipe is used to seal the opening of the pressure relief pipe; a pressure relief spring is also provided in the pipe body, and the pressure relief spring is extended and retracted along the sliding direction of the opening and closing pipe; the pressure relief spring is used to push the opening and closing pipe to move away from the pressure relief pipe, and a baffle is provided on the side wall of the opening and closing pipe facing the flow direction of the medium, and a plurality of through holes arranged in sequence at intervals are penetrated on the baffle, a pressure relief hole is penetrated on the outer circumferential surface of the opening and closing pipe, and the pressure relief pipe is located on the sliding path of the pressure relief hole.

[0007] Preferably, a mounting groove is coaxially provided on the tube body, and a plurality of mounting rods are circumferentially evenly spaced on the inner wall of the mounting groove, and the pressure relief springs are respectively sleeved on the outside of each mounting rod; the opening and closing tubes are movably passed through the outside of each mounting rod, one side of the pressure relief spring is in conflict with the inner wall of the mounting groove, and the other side of the pressure relief spring is in conflict with the opening and closing tube.

[0008] Preferably, an adjusting nut is threadedly connected to the mounting rod, and the adjusting nut is located on the side of the opening and closing tube away from the pressure relief spring.

[0009] Preferably, a sealing groove located outside the opening and closing tube is coaxially provided on the outer side wall of the tube body, and a sealing ring is placed in the sealing groove.

[0010] Preferably, a plug hole is passed through the central axis of the baffle, a plug rod is detachably installed in the plug hole, a dust cover located in the opening and closing tube is coaxially arranged on the plug rod, and the dust cover is used to cover the through hole.

[0011] Preferably, the dust cover is provided with plug-in posts corresponding one-to-one to the through holes, and the plug-in posts are used to be inserted into the through holes.

[0012] Preferably, a limiting disk is coaxially provided at one end of the insertion rod away from the dust cover, and the outer diameter of the limiting disk is larger than the outer diameter of the insertion rod.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] 1. When the flow rate of the medium flowing into the pipe body suddenly increases, the opening and closing pipe will further compress the pressure relief spring under the push of the medium. As the opening and closing pipe moves in the pipe body, the pressure relief hole will gradually approach the pressure relief pipe; when the pressure relief hole moves with the opening and closing pipe to face the opening of the pressure relief pipe, the excess medium will be discharged into the pressure relief pipe through the pressure relief hole. The excess medium is discharged from the pipe body through the pressure relief pipe, which can effectively alleviate the adverse effects on the flange pipe fittings caused by the sudden increase in medium flow and ensure the stability of the pipe body structure; when the medium flow returns to normal, the pressure relief spring will push the opening and closing pipe to reset until the pressure relief hole moves to fit the inner wall of the pipe body, and the medium can then flow smoothly in the pipe body;

[0015] 2. The adjusting nut can adjust the expansion and contraction displacement of the pressure relief spring, thereby adjusting the pressure relief value of the opening and closing pipe, making it more flexible to use;

[0016] 3. When the tube body is transported, the through hole is covered by a dust cover, which can effectively prevent external dust or foreign matter from entering the tube body during transportation, and has a better dust-proof effect on the inside of the tube body, ensuring the cleanliness of the inside of the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0018] Figure 2 yes Figure 1 Schematic diagram of the local structure explosion;

[0019] Figure 3 yes Figure 2 Schematic diagram of the explosion of the local structure highlighting the bottom of the opening and closing pipe.

[0020] Explanation of the accompanying reference numerals: 1. Tube body; 10. Mounting groove; 11. Sealing groove; 12. Sealing ring; 2. Pressure relief pipe; 3. Opening and closing pipe; 30. Baffle; 31. Pressure relief hole; 32. Connecting hole; 33. Dust cover; 34. Connecting column; 35. Limiting plate; 36. Through hole; 37. Insert rod; 4. Pressure relief spring; 5. Mounting rod; 50. Adjusting nut. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the accompanying drawings.

[0022] An embodiment of the present application discloses a flange pipe fitting.

[0023] Reference Figure 1 、 Figure 2 The flange pipe fitting comprises a hollow pipe body 1. A pressure relief pipe 2 is fixedly mounted on the outer wall of the pipe body 1 near the interface of the pipe body 1, and the pressure relief pipe 2 is connected to the interior of the pipe body 1. A mounting groove 10 is coaxially provided on the interface surface of the pipe body 1. A plurality of parallel mounting rods 5 are evenly spaced circumferentially on the inner wall of the mounting groove 10. The length of the mounting rods 5 extends along the length of the pipe body 1.

[0024] like Figure 2 、 Figure 3 As shown, each mounting rod 5 is sheathed with a pressure relief spring 4, which expands and contracts along the length of the mounting rod 5. An opening and closing tube 3 is also movably arranged in the mounting groove 10. The end of the opening and closing tube 3 away from the interface surface of the tube body 1 is slidably arranged in the tube body 1 along the direction of medium flow, and the outer wall of the opening and closing tube 3 is in contact with the inner wall of the tube body 1.

[0025] like Figure 2 、 Figure 3 As shown, the opening and closing tubes 3 are movably mounted on the outside of each mounting rod 5 and slide along the length of the mounting rod 5. One side of the pressure relief spring 4 contacts the inner wall of the mounting groove 10, while the other side of the pressure relief spring 4 contacts the outer wall of the opening and closing tube 3. The pressure relief spring 4 is used to push the opening and closing tube 3 away from the pressure relief tube 2. When the medium flow rate within the pipe body 1 is within the normal range, the opening and closing tube 3 remains blocked from the opening of the pressure relief tube 2, allowing the medium to flow normally within the pipe body 1.

[0026] like Figure 2 、 Figure 3 As shown, a baffle 30 located inside the pipe body 1 is fixedly installed on the side wall of the opening and closing pipe 3 facing the medium flow direction. The baffle 30 is penetrated by a plurality of through holes 36 arranged in sequence, and the medium can flow smoothly in the pipe body 1 through the through holes 36.

[0027] like Figure 2 、 Figure 3As shown, a pressure relief hole 31 is passed through the outer circumferential surface of the opening and closing pipe 3 near the mounting groove 10. The pressure relief hole 31 is interconnected with the inside of the opening and closing pipe 3, and the pressure relief pipe 2 is located on the sliding path of the pressure relief hole 31. When the flow rate of the medium flowing into the pipe body 1 suddenly increases and exceeds the normal range value, the medium will push the opening and closing pipe 3 through the baffle 30 to compress the pressure relief spring 4. At this time, the pressure relief hole 31 will follow the opening and closing pipe 3 and gradually approach the pressure relief pipe 2. When the position of the pressure relief hole 31 moves to communicate with the opening of the pressure relief pipe 2, the excess medium can be discharged from the pipe body 1 through the pressure relief pipe 2. By reducing the medium flow, the impact of the medium on the pipe body 1 can be reduced in time, and the purpose of pressure relief is achieved on the pipe body 1, thereby protecting the pipe body 1.

[0028] like Figure 2 、 Figure 3 As shown, the end of the mounting rod 5 is threadedly connected with an adjusting nut 50, which is located on the side of the opening and closing tube 3 away from the pressure relief spring 4. The adjusting nut 50 can adjust the telescopic displacement of the pressure relief spring 4, thereby realizing the adjustment of the pressure relief value of the opening and closing tube 3, which is more flexible in use.

[0029] like Figure 2 、 Figure 3 As shown, a sealing groove 11 located outside the opening and closing pipe 3 is coaxially arranged on the outer wall of the opening surface of the pipe body 1, and a sealing ring 12 is placed in the sealing groove 11. The sealing ring 12 can ensure the sealing of the pipe body 1 when connected to the external pipeline.

[0030] like Figure 2 、 Figure 3 As shown, a plug hole 32 extends through the central axis of the baffle 30. A plug rod 37 is removably mounted within the plug hole 32. A dust cover 33, located within the opening and closing tube 3, is coaxially mounted on the plug rod 37. The dust cover 33 covers each through-hole 36. The dust cover 33 also has integrally formed plug posts 34 corresponding to each through-hole 36. The plug posts 34 are configured to be inserted into their respective corresponding through-holes 36. A limit plate 35 is coaxially fixedly mounted on the end of the plug rod 37 away from the dust cover 33. The outer diameter of the limit plate 35 is larger than that of the plug rod 37.

[0031] When the tube body 1 is transported, the through holes 36 are covered with the dust cover 33. The plug-in posts 34 are engaged with the through holes 36 to further secure the dust cover 33 within the opening and closing tube 3. This effectively prevents external dust or foreign matter from entering the tube body 1 through the through holes 36 during transportation, effectively preventing dust from entering the tube body 1 and ensuring the cleanliness of the interior of the tube body 1. When the tube body 1 needs to be connected to an external pipeline, the dust cover 33 can be removed by holding the limit plate 35 and then pulling the plug 37 away from the baffle 30.

[0032] The implementation principle is as follows: when the flow rate of the medium flowing into the pipe body 1 suddenly increases, the opening and closing pipe 3 will further compress the pressure relief spring 4 under the push of the medium. As the opening and closing pipe 3 moves in the pipe body 1, the pressure relief hole 31 will gradually approach the pressure relief pipe 2. When the pressure relief hole 31 moves with the opening and closing pipe 3 to face the opening of the pressure relief pipe 2, the excess medium will be discharged into the pressure relief pipe 2 through the pressure relief hole 31. The excess medium is discharged from the pipe body 1 through the pressure relief pipe 2, thereby effectively alleviating the adverse effects on the pipe body 1 caused by the sudden increase in the medium flow rate, and ensuring the stability and sealing of the pipe body 1 structure. When the medium flow returns to normal, the pressure relief spring 4 will push the opening and closing pipe 3 to reset until the pressure relief hole 31 moves to fit the inner wall of the pipe body 1. At this time, the medium can flow smoothly in the pipe body 1.

[0033] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flange pipe fitting, comprising a pipe body (1), characterized in that: The outside of the tube body (1) is connected to a pressure relief tube (2), and an opening and closing tube (3) is provided in the tube body (1) so as to slide along the flow direction of the medium. The outer wall of the opening and closing tube (3) fits in contact with the inner wall of the tube body (1), and the opening and closing tube (3) is used to seal the opening of the pressure relief tube (2); a pressure relief spring (4) is also provided in the tube body (1), and the pressure relief spring (4) is extended and retracted along the sliding direction of the opening and closing tube (3); the pressure relief spring (4) is used to push the opening and closing tube (3) to move away from the pressure relief tube (2), and a baffle (30) is provided on the side wall of the opening and closing tube (3) facing the flow direction of the medium, and a plurality of through holes (36) are passed through the baffle (30) and are arranged in sequence at intervals. A pressure relief hole (31) is passed through the outer circumferential surface of the opening and closing tube (3), and the pressure relief tube (2) is located on the sliding path of the pressure relief hole (31).

2. The flange pipe fitting according to claim 1, characterized in that: The tube body (1) is coaxially provided with a mounting groove (10), and a plurality of mounting rods (5) are circumferentially evenly spaced on the inner side wall of the mounting groove (10), and the pressure relief spring (4) is respectively sleeved on the outside of each mounting rod (5); the opening and closing tube (3) is movably passed through the outside of each mounting rod (5), and one side of the pressure relief spring (4) contacts the inner side wall of the mounting groove (10), and the other side of the pressure relief spring (4) contacts the opening and closing tube (3).

3. The flange pipe fitting according to claim 2, characterized in that: An adjusting nut (50) is threadedly connected to the mounting rod (5), and the adjusting nut (50) is located on a side of the opening and closing tube (3) facing away from the pressure relief spring (4).

4. The flange pipe fitting according to claim 3, characterized in that: A sealing groove (11) located outside the opening and closing tube (3) is coaxially arranged on the outer side wall of the tube body (1), and a sealing ring (12) is placed in the sealing groove (11).

5. The flange pipe fitting according to claim 1, characterized in that: A plug hole (32) is passed through the central axis of the baffle (30), a plug rod (37) is detachably installed in the plug hole (32), and a dust cover (33) located in the opening and closing tube (3) is coaxially arranged on the plug rod (37), and the dust cover (33) is used to cover the through hole (36).

6. The flange pipe fitting according to claim 5, characterized in that: The dust cover (33) is provided with plug-in posts (34) corresponding one to one with the through holes (36), and the plug-in posts (34) are used to be inserted into the through holes (36).

7. The flange pipe fitting according to claim 6, characterized in that: A limiting disk (35) is coaxially arranged on one end of the insertion rod (37) away from the dust cover (33), and the outer diameter of the limiting disk (35) is larger than the outer diameter of the insertion rod (37).

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