High-pressure self-tightening flange

Abstract

According to the technical scheme, the high-pressure self-tightening flange is characterized in that the high-pressure self-tightening flange comprises a flange body, the flange body is fixedly connected with a pipeline, the pipeline is connected with a self-tightening mechanism, the flange body is further provided with a containing groove, and the self-tightening mechanism comprises a first sliding piece and a second sliding piece; the first sliding piece is connected with a moving piece connected with the second sliding piece, the moving piece is connected with an elastic gasket arranged in the direction away from the first sliding piece, the elastic gasket is arranged around the pipeline, and the containing groove, the first sliding piece, the second sliding piece and the moving piece form a containing cavity formed in the flange body. A structure similar to hydraulic pressure is formed through the containing groove, the first sliding piece, the second sliding piece and the moving piece, the elastic gasket is driven to move and extrudes the elastic gasket to reduce a gap making contact with the attaching face, and therefore the connecting position of the pipeline is blocked, and the pipeline is not prone to being damaged. And the effect that the joint can be tightly attached when high-strength pressure is borne is achieved.

Description

Technical Field

[0001] The utility model relates to a flange, more specifically, it relates to a high-pressure self-tightening flange. Background Art

[0002] Flange, also known as flange flange or flange, is a part that connects multiple pipes or equipment to each other. It is used to connect the pipe ends. The flange body, gasket and bolts are connected to each other as a detachable connection of a combined sealing structure. There are holes on the flange body, and the bolts make the two flange bodies tightly connected, and the two flange bodies are sealed with gaskets. The flange body is usually directly welded to pipes, valves and other components. It can be used as a separate component or directly welded to the equipment when the equipment is manufactured. When transporting high-pressure liquids, direct welding with the equipment is usually adopted. Therefore, the risk of leakage will be concentrated at the connection between the two flange bodies. In the prior art, the method of compacting the gasket is used to reduce the possibility of leakage, but this method not only requires manual control by the staff, but also the gasket gradually loses its elasticity under long-term compaction, reducing its service life. Therefore, a high-pressure self-tightening flange is needed, which will fit tightly at the connection when subjected to high-intensity pressure.

[0003] In view of the above reasons, how to ensure that the joints are tightly fitted when subjected to high-intensity pressure is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the prior art, a high-pressure self-tightening flange is provided, which can tightly fit the connection when subjected to high-intensity pressure.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: a high-pressure self-tightening flange, comprising a flange body, the flange body is fixedly connected to a pipeline, the pipeline is connected to a self-tightening mechanism, the flange body is also provided with a receiving groove, the self-tightening mechanism comprises a first sliding member slidably connected to the outer wall of the pipeline and a second sliding member slidably connected to the inner wall of the receiving groove, the first sliding member is connected to a moving member connected to the second sliding member and arranged at a notch of the receiving groove, the moving member is connected to an elastic gasket arranged in a direction away from the first sliding member, the elastic gasket is arranged around the pipeline, the receiving groove, the first sliding member, the second sliding member and the moving member form a receiving cavity provided in the flange body, and the pipeline is provided with a through hole for connecting the pipeline with the receiving cavity.

[0006] In summary, the above technical solution has the following beneficial effects: being subjected to high-intensity pressure means that the inner wall of the pipeline is subjected to liquid pressure exceeding the predetermined size, which is essentially because the mass of the liquid per unit volume in the pipeline is too large, causing the actual volume of the liquid to increase and exceed the unit volume in the pipeline, thereby forming a hydraulic effect and leaking from the connection of the pipeline;

[0007] In order to cope with this situation, an accommodating cavity is formed in the flange body by the accommodating groove, the first sliding member, the second sliding member and the moving member, and the volume of the accommodating cavity changes with the movement of the first sliding member, the second sliding member and the moving member, and the notch of the accommodating groove is arranged toward the liquid outlet direction of the pipeline, so that the moving member can drive the elastic gasket to move toward the connection, and reduce the gap of the contact fitting surface by squeezing the elastic gasket. At this time, the elastic gasket can play a similar effect to the pipeline. Since the elastic gasket is arranged around the pipeline, it can block the connection of the pipeline and achieve a self-tightening effect to prevent leakage.

[0008] In order to increase the service life of the elastic gasket, it is necessary that the connection can fit tightly only when it is subjected to high-intensity pressure. Therefore, the accommodating chamber formed by the accommodating groove, the first sliding member, the second sliding member and the moving member is relatively closed, and liquid can only flow in from the through hole. After the accommodating chamber is filled with liquid, when the mass of liquid per unit volume in the pipeline is too large, the hydraulic pressure continues to increase. At this time, the moving member can be driven to move by the liquid pressure like a common hydraulic structure, and the increase in hydraulic pressure is slowed down by increasing the volume until the elastic gasket is squeezed to the limit. The first sliding member and the second sliding member are used to stabilize the movement of the moving member. When it is no longer subjected to high-intensity pressure, the hydraulic pressure decreases. Since the pipeline is relatively closed, the moving member will move in the direction under the action of atmospheric pressure until the liquid pressure on the inner wall of the pipeline returns to normal.

[0009] The utility model forms a hydraulic structure through the accommodating groove, the first sliding member, the second sliding member and the moving member, which drives the elastic gasket to move and squeeze the elastic gasket to reduce the gap of the contact fitting surface, thereby sealing the connection of the pipeline and achieving the effect that the connection will be tightly fitted when subjected to high-intensity pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of a high-pressure self-tightening flange;

[0011] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0012] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.

[0013] Reference numerals: 1. flange body; 2. pipeline; 3. self-tightening mechanism;

[0014] 11. Accommodation slot; 12. Accommodation cavity; 13. Track slot;

[0015] 21. Through hole; 22. Air bag;

[0016] 31. first sliding member; 32. second sliding member; 33. moving member; 34. elastic gasket;

[0017] 311, first threaded hole; 312, first screw; 313, first sealing member;

[0018] 321, a resisting member; 322, a second threaded hole; 323, a second screw; 324, a second sealing member;

[0019] 331, channel; 332, single-way liquid inlet mechanism; 333, positioning pile; 334, elastic member; 335, first thread groove; 336, second thread groove; 337, positioning member;

[0020] 341. Positioning groove. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0022] Reference Figure 1-3 As shown, a high-pressure self-tightening flange includes a flange body 1, the flange body 1 is fixedly connected to a pipeline 2, the pipeline 2 is connected to a self-tightening mechanism 3, the flange body 1 is also provided with a receiving groove 11, the self-tightening mechanism 3 includes a first sliding member 31 slidably connected to the outer wall of the pipeline 2 and a second sliding member 32 slidably connected to the inner wall of the receiving groove 11, the first sliding member 31 is connected to a moving member 33 connected to the second sliding member 32 and arranged at the notch of the receiving groove 11, the moving member 33 is connected to an elastic gasket 34 arranged in a direction away from the first sliding member 31, the elastic gasket 34 is arranged around the pipeline 2, the receiving groove 11, the first sliding member 31, the second sliding member 32 and the moving member 33 form an accommodating cavity 12 arranged in the flange body 1, and the pipeline 2 is provided with a through hole 21 for connecting the pipeline 2 with the accommodating cavity 12;

[0023] Being subjected to high-intensity pressure means that the inner wall of the pipe 2 is subjected to liquid pressure exceeding the predetermined size. Its essence is that the mass of the liquid per unit volume in the pipe 2 is too large, causing the actual volume of the liquid to increase and exceed the unit volume in the pipe 2, thereby forming a hydraulic effect and leaking from the connection of the pipe 2;

[0024] In order to cope with this situation, an accommodating chamber 12 is formed in the flange body 1 by the accommodating groove 11, the first sliding member 31, the second sliding member 32 and the moving member 33, and as the first sliding member 31, the second sliding member 32 and the moving member 33 move, the volume of the accommodating chamber 12 will change, and the notch of the accommodating groove 11 is arranged toward the liquid outlet direction of the pipe 2, so that the moving member 33 can drive the elastic gasket 34 to move toward the connection, and reduce the gap of the contact fitting surface by squeezing the elastic gasket 34. At this time, the elastic gasket 34 can play an effect similar to the pipe 2. Since the elastic gasket 34 is arranged around the pipe 2, it can block the connection of the pipe 2 and achieve a self-tightening effect to prevent leakage.

[0025] In order to increase the service life of the elastic gasket 34, it is necessary that the connection can fit tightly only when subjected to high-intensity pressure. Therefore, the accommodating chamber 12 formed by the accommodating groove 11, the first sliding member 31, the second sliding member 32 and the moving member 33 is relatively closed and can only flow into the liquid from the through hole 21. After the accommodating chamber 12 is filled with liquid, when the mass of the liquid per unit volume in the pipeline 2 is too large, the hydraulic pressure continues to increase. At this time, the moving member 33 can be driven to move by the liquid pressure like a common hydraulic structure, and the increase in hydraulic pressure is slowed down by increasing the volume until the elastic gasket 34 is squeezed to the limit. The first sliding member 31 and the second sliding member 32 are used to stabilize the movement of the moving member 33. When it is no longer subjected to high-intensity pressure, the hydraulic pressure decreases. Since the pipeline 2 is relatively closed, the moving member 33 will move in the direction under the action of atmospheric pressure until the liquid pressure on the inner wall of the pipeline 2 returns to normal.

[0026] The utility model forms a hydraulic structure through the accommodating groove 11, the first sliding member 31, the second sliding member 32 and the moving member 33, which drives the elastic gasket 34 to move and squeeze the elastic gasket 34 to reduce the gap of the contact fitting surface, thereby blocking the connection of the pipeline 2 and achieving the effect that the connection will be tightly fitted when subjected to high-intensity pressure.

[0027] Furthermore, the flange body 1 is further provided with a track groove 13 provided at one end of the second sliding member 32 away from the moving member 33, the second sliding member 32 is fixedly connected with an abutment member 321 slidably connected to the inner wall of the track groove 13, and the length of the track groove 13 is shorter than the length of the first sliding member 31;

[0028] The cooperation between the track groove 13 and the abutment 321 can stabilize the moving direction of the second sliding member 32. When the abutment 321 abuts against the inner wall of the track groove 13, the second sliding member 32 can be prevented from moving further, thereby preventing the first sliding member 31, the second sliding member 32 and the moving member 33 from being separated from the flange body 1.

[0029] The length of the track groove 13 is shorter than that of the first sliding member 31 , which can prevent the first sliding member 31 from not contacting the pipe 2 when the first sliding member 31 , the second sliding member 32 and the moving member 33 move to the limit, thereby preventing the accommodating chamber 12 from leaking.

[0030] Furthermore, a section of the through hole 21 facing the interior of the accommodating chamber 12 is arranged in a direction close to the moving member 33, and a section of the through hole 21 facing the interior of the pipe 2 is arranged in a direction away from the moving member 33;

[0031] Since the direction of liquid flow is the direction of movement of the moving part 33, the through hole 21 is set to be inclined, and a section of the through hole 21 facing the inside of the accommodating chamber 12 is set in the direction close to the moving part 33, which can make it easier for the liquid to flow into the accommodating chamber 12, and when the liquid flows in the opposite direction, it is not easy to flow into the accommodating chamber 12.

[0032] Furthermore, the pipe 2 is also fixedly connected to an air bag 22 disposed in the accommodating cavity 12, and the through hole 21 communicates the interior of the air bag 22 with the interior of the pipe 2;

[0033] During actual use, the properties of the liquid flowing in the pipe 2 are uncertain and may not be suitable for being retained in the accommodating chamber 12 for a long time. Therefore, the airbag 22 can be used to prevent the liquid flowing in the pipe 2 from entering the accommodating chamber 12, and a liquid with stable properties is injected into the accommodating chamber 12 to isolate and form a hydraulic structure. In this way, when subjected to high-intensity pressure, the volume of the airbag 22 can expand under the action of the liquid flowing in the pipe 2, thereby reducing the volume of the accommodating chamber 12, but the volume of the liquid in the accommodating chamber 12 remains unchanged. In order to provide sufficient volume, it can still drive the moving part 33 to move. When it is no longer subjected to high-intensity pressure, the airbag 22 uses elastic force to bring the internal liquid back to the pipe 2.

[0034] Furthermore, the moving member 33 is also provided with a channel 331 connecting the accommodating chamber 12 and the outside of the moving member 33. The moving member 33 is also connected to a one-way liquid inlet mechanism 332 provided in the accommodating chamber 12 and used to close the channel 331. The one-way liquid inlet mechanism 332 includes a plurality of positioning piles 333 fixedly connected to the moving member 33 and distributed around the channel 331. The positioning piles 333 are fixedly connected to an elastic member 334 having a diameter greater than that of the channel 331.

[0035] A one-way liquid inlet mechanism 332 is provided for injecting a liquid of stable nature into the accommodating chamber 12 from the outside. When the liquid is injected, the liquid impacts the elastic member 334 and causes the elastic member 334 to deform, so that an opening is formed on the elastic member 334 between the two positioning piles 333, and the liquid can enter the accommodating chamber 12 from this opening. However, when the liquid wants to leave the accommodating chamber 12, the liquid will also impact the elastic member 334. However, at this time, the edge of the elastic member 334 will conflict with the moving member 33, and no opening can be formed, so the liquid cannot leave the accommodating chamber 12.

[0036] Furthermore, the first sliding member 31 is provided with a first threaded hole 311, and the moving member 33 is provided with a first threaded groove 335 at one end facing the first sliding member 31, and the first threaded hole 311 is threadedly connected with a first screw 312 threadedly connected with the first threaded groove 335;

[0037] The first sliding member 31 is also fixedly connected to a first sealing member 313 which is fixedly connected to the moving member 33;

[0038] The first sliding member 31 is detachably connected to the movable member 33 by a first screw 312, which can facilitate subsequent maintenance. In addition, a first seal 313 is required to prevent liquid from leaking from the connection between the first sliding member 31 and the movable member 33, and the first seal 313 is a disposable item and will be directly destroyed when the first sliding member 31 is disassembled. A new first seal 313 needs to be reconnected when it is installed again.

[0039] Furthermore, the second sliding member 32 is provided with a second threaded hole 322, and the moving member 33 is provided with a second threaded groove 336 at one end facing the second sliding member 32, and the second threaded hole 322 is threadedly connected with a second screw 323 threadedly connected with the second threaded groove 336;

[0040] The second sliding member 32 is also fixedly connected to a second sealing member 324 which is fixedly connected to the moving member 33;

[0041] The second sliding member 32 is detachably connected to the movable member 33 by a second screw 323, which can facilitate subsequent maintenance. In addition, a second seal 324 is required to prevent liquid from leaking from the connection between the second sliding member 32 and the movable member 33, and the second seal 324 is a disposable item and will be directly destroyed when the second sliding member 32 is disassembled. A new second seal 324 needs to be reconnected when it is installed again.

[0042] Furthermore, a positioning member 337 with a “T”-shaped cross section is fixedly connected to one end of the moving member 33 facing the elastic gasket 34 , and the elastic gasket 34 is provided with a positioning groove 341 for accommodating the positioning member 337 .

[0043] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A high-pressure self-tightening flange, characterized in that: The invention comprises a flange body (1), wherein the flange body (1) is fixedly connected to a pipeline (2), wherein the pipeline (2) is connected to a self-tightening mechanism (3), wherein the flange body (1) is further provided with a receiving groove (11), wherein the self-tightening mechanism (3) comprises a first sliding member (31) slidably connected to the outer wall of the pipeline (2) and a second sliding member (32) slidably connected to the inner wall of the receiving groove (11), wherein the first sliding member (31) is connected to a second sliding member (32) and is provided in the receiving groove (11). ) groove, the movable member (33) being connected to an elastic gasket (34) arranged in a direction away from the first sliding member (31), the elastic gasket (34) being arranged around the pipe (2), the accommodating groove (11), the first sliding member (31), the second sliding member (32) and the movable member (33) forming an accommodating cavity (12) arranged in the flange body (1), and the pipe (2) being provided with a through hole (21) for connecting the pipe (2) with the accommodating cavity (12).

2. A high pressure self-tightening flange according to claim 1, characterized in that: The flange body (1) is further provided with a track groove (13) arranged at one end of the second sliding member (32) away from the moving member (33); the second sliding member (32) is fixedly connected with an abutment member (321) slidably connected to the inner wall of the track groove (13); the length of the track groove (13) is shorter than the length of the first sliding member (31).

3. A high pressure self-tightening flange according to claim 1, characterized in that: A section of the through hole (21) facing the interior of the accommodating chamber (12) is arranged in a direction close to the moving member (33), and a section of the through hole (21) facing the interior of the pipeline (2) is arranged in a direction away from the moving member (33).

4. A high-pressure self-tightening flange according to claim 3, characterized in that: The pipeline (2) is also fixedly connected to an air bag (22) arranged in the accommodating cavity (12), and the through hole (21) communicates the interior of the air bag (22) and the interior of the pipeline (2).

5. A high pressure self-tightening flange according to claim 4, characterized in that: The movable member (33) is further provided with a channel (331) communicating with the accommodating cavity (12) and the outside of the movable member (33); the movable member (33) is further connected with a one-way liquid inlet mechanism (332) provided in the accommodating cavity (12) and used for closing the channel (331); the one-way liquid inlet mechanism (332) comprises a plurality of positioning piles (333) fixedly connected to the movable member (33) and distributed around the channel (331); the positioning piles (333) are fixedly connected with an elastic member (334) having a diameter greater than that of the channel (331).

6. A high pressure self-tightening flange according to claim 1, characterized in that: The first sliding member (31) is provided with a first threaded hole (311), and the moving member (33) is provided with a first threaded groove (335) at one end facing the first sliding member (31), and the first threaded hole (311) is threadedly connected to a first screw (312) threadedly connected to the first threaded groove (335).

7. A high-pressure self-tightening flange according to claim 6, characterized in that: The first sliding member (31) is also fixedly connected to a first sealing member (313) which is fixedly connected to the moving member (33).

8. The high-pressure self-tightening flange according to claim 1, characterized in that: The second sliding member (32) is provided with a second threaded hole (322), and the moving member (33) is provided with a second threaded groove (336) at one end facing the second sliding member (32), and the second threaded hole (322) is threadedly connected to a second screw (323) threadedly connected to the second threaded groove (336).

9. A high pressure self-tightening flange according to claim 8, characterized in that: The second sliding member (32) is also fixedly connected to a second sealing member (324) which is fixedly connected to the moving member (33).

10. A high pressure self-tightening flange according to claim 1, characterized in that: A positioning member (337) with a T-shaped cross section is fixedly connected to one end of the moving member (33) facing the elastic gasket (34), and the elastic gasket (34) is provided with a positioning groove (341) for accommodating the positioning member (337).

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