Double-clamping-sleeve pipe joint structure internally provided with gasket

Abstract

The utility model relates to the technical field of double-ferrule pipe joints, discloses a double-ferrule pipe joint structure internally provided with a gasket, and solves the problems that the sealing performance of an existing double-ferrule pipe joint is poor, medium leakage can be caused in the using process, and conveying is affected, the double-ferrule pipe joint structure comprises a joint body, and a front ferrule is connected to the upper side of the interior of the joint body in an inserted mode. The top of the connector body is in threaded connection with a threaded sleeve, a gasket is movably installed on the top of the interior of the threaded sleeve, the bottom of the gasket is tightly attached to the rear clamping sleeve, a sealing ring is fixedly installed on the upper portion of the interior of the threaded sleeve, and the inner wall of the sealing ring is tightly attached to the circumferential face of the front clamping sleeve and the circumferential face of the rear clamping sleeve. Mounting grooves are formed in the middles of the two sides of the inner wall of the threaded sleeve, sealing air rings are fixedly mounted in the mounting grooves, and two mounting boxes are symmetrically and fixedly mounted on the surface of the threaded sleeve; the double-clamping-sleeve joint has very good sealing performance, and avoids medium leakage in use, so that the conveying effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of double-cuff pipe joints, in particular to a double-cuff pipe joint structure with a gasket arranged inside. Background Art

[0002] The working principle of the double ferrule joint is to insert the steel pipe into the ferrule, lock it with the ferrule nut, contact the ferrule, cut into the pipe and seal it; it does not need welding when connected to the steel pipe, which is conducive to fire prevention, explosion prevention and high-altitude operation, and can eliminate the disadvantages caused by careless welding; therefore, it is a more advanced connector in the pipeline of automatic control devices in oil refining, chemical industry, petroleum, natural gas, food, pharmaceutical, instrumentation and other systems. It is suitable for connecting oil, gas, water and other pipelines; the existing double ferrule joint has poor sealing performance, which will cause leakage of the medium during use, thus affecting the transportation. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a double-ferrule pipe joint structure with a built-in gasket, which effectively solves the problem that the existing double-ferrule joint has poor sealing performance and may cause leakage of the medium during use, thereby affecting the transportation.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-ferrule pipe joint structure with a built-in gasket, comprising a joint body, a front ferrule is inserted into the upper side of the interior of the joint body, a rear ferrule is inserted into the upper side of the interior of the front ferrule, a threaded sleeve is threadedly connected to the top of the joint body, a gasket is movably installed at the top of the interior of the threaded sleeve, the bottom of the gasket is tightly attached to the rear ferrule, a sealing ring is fixedly installed at the upper part of the interior of the threaded sleeve, the inner wall of the sealing ring is tightly attached to the circumferential surface of the front ferrule and the rear ferrule, installation grooves are opened in the middle of both sides of the inner wall of the threaded sleeve, sealing air rings are fixedly installed inside the installation grooves, two installation boxes are symmetrically fixedly installed on the surface of the threaded sleeve, and an expansion sealing assembly is provided between the interiors of the two installation boxes.

[0005] Preferably, the expansion sealing assembly includes two air storage bags, which are respectively fixedly mounted on the inner walls of the two mounting boxes on the sides close to each other, and the two air storage bags are tightly attached to the sides away from each other with extrusion hoops, and positioning slide bars are fixedly mounted on the upper and lower sides of the two extrusion hoops on the sides away from each other, and the surfaces of the positioning slide bars are sleeved with positioning sleeves, and four positioning sleeves are respectively fixedly mounted on the sides of the two mounting boxes away from each other, and air nozzles are fixedly mounted on the sides close to each other of the two air storage bags, and the ends of the two air nozzles close to each other extend to the inside of the two mounting grooves respectively and are fixedly mounted with sealing air rings, and the two sealing air rings are respectively fixedly mounted inside the two mounting grooves.

[0006] Preferably, a rectangular column is fixedly installed in the middle part of the two extrusion hoops away from each other, a rack is fixedly installed at the bottom of the rectangular column, a gear is meshed and connected on the lower side of the rack, a worm gear is fixedly installed on one side of the gear, and a rotating rod is rotatably installed between the middle parts of adjacent gears and worm wheels, and the two ends of the two rotating rods are respectively fixedly connected to the inside of the two installation boxes.

[0007] Preferably, the lower side of the worm wheel is meshingly connected with a worm, the ends of the two worms close to each other are rotatably installed with a shaft seat, the ends of the two shaft seats close to each other are fixedly installed with a connecting frame, the ends of the two connecting frames away from each other are fixedly connected to the inner wall of the installation box, the ends of the two worms away from each other are fixedly installed with a shaft rod, the surfaces of the shaft rods are rotatably installed with shaft sleeves, the two shaft sleeves are respectively fixedly connected to the two installation boxes, and the ends of the two shaft rods away from each other extend to the outside of the installation box and are fixedly installed with hand wheels.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the operator inserts the steel pipe into the interior of the joint body, and then the operator inserts the front ferrule into the top of the joint body, and then the rear ferrule into the top of the front ferrule, and then the operator fastens the threaded sleeve to the surface of the joint body through threads; then the operator turns the two hand wheels in sequence, and when the hand wheels rotate, the shaft rod is driven to rotate along the interior of the shaft sleeve, and when the shaft rod rotates, the worm is driven to rotate along the shaft seat, and when the worm rotates, the worm wheel is driven to rotate, and when the worm wheel rotates, the gear is driven to rotate along the rotating rod;

[0009] When the gear rotates, the rectangular column is driven to move inward through the rack. When the rectangular column moves inward, it drives the extrusion hoop to squeeze the air storage bag. When the extrusion hoop moves, it drives the positioning slide bar to slide along the surface of the positioning slide sleeve, thereby increasing the stability of the extrusion hoop when moving. When the air storage bag is squeezed, the gas inside it will be squeezed into the interior of the sealing air ring through the air nozzle, thereby expanding the sealing air ring. The expanded sealing air ring can fill the gap between the joint body and the threaded sleeve, thereby achieving a very good sealing effect; this makes the double ferrule joint have a very good sealing performance, avoids leakage of the medium during use, and thus ensures the conveying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0011] In the attached picture:

[0012] Figure 1 This is a schematic diagram of the structure of a double-ferrule pipe joint with a gasket inside the utility model;

[0013] Figure 2This is a schematic cross-sectional view of a double-ferrule pipe joint with a gasket inside the utility model;

[0014] Figure 3 For this utility model Figure 2 A schematic diagram of a local enlarged structure;

[0015] In the figure: 1. connector body; 2. threaded sleeve; 3. front ferrule; 4. rear ferrule; 5. gasket; 6. sealing ring; 7. mounting groove; 8. mounting box; 9. sealing air ring; 10. air nozzle; 11. air storage bag; 12. rectangular column; 13. rack; 14. extrusion hoop; 15. positioning slide rod; 16. positioning slide sleeve; 17. gear; 18. worm gear; 19. rotating rod; 20. worm; 21. shaft seat; 22. connecting frame; 23. shaft rod; 24. shaft sleeve; 25. hand wheel. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] Depend on Figures 1 to 3 The utility model includes a joint body 1, a front ferrule 3 is inserted into the upper side of the joint body 1, a rear ferrule 4 is inserted into the upper side of the front ferrule 3, a threaded sleeve 2 is threadedly connected to the top of the joint body 1, a gasket 5 is movably installed at the top of the threaded sleeve 2, the bottom of the gasket 5 is tightly attached to the rear ferrule 4, a sealing ring 6 is fixedly installed on the upper part of the threaded sleeve 2, the inner wall of the sealing ring 6 is tightly attached to the circumferential surface of the front ferrule 3 and the rear ferrule 4, installation grooves 7 are opened in the middle of both sides of the inner wall of the threaded sleeve 2, and sealing air rings 9 are fixedly installed in the installation grooves 7, two installation boxes 8 are symmetrically fixedly installed on the surface of the threaded sleeve 2, and an expansion sealing assembly is provided between the two installation boxes 8.

[0018] The operator inserts the steel pipe into the interior of the joint body 1, and then the operator inserts the front ferrule 3 into the top of the joint body 1, and then the rear ferrule 4 into the top of the front ferrule 3, and then the operator fastens the threaded sleeve 2 to the surface of the joint body 1 through threads; then the operator adjusts the expansion sealing assembly to fill the gap between the joint body 1 and the threaded sleeve 2, thereby achieving a very good sealing effect; this makes the double ferrule joint have very good sealing performance, avoiding leakage of the medium during use, thereby ensuring the transportation effect.

[0019] The expansion sealing assembly includes two air storage bags 11, which are respectively fixedly mounted on the inner walls of the two mounting boxes 8 on the sides close to each other. The two air storage bags 11 are closely attached to the extrusion hoop 14 on the sides away from each other. Positioning slide bars 15 are fixedly mounted on the upper and lower sides of the two extrusion hoops 14 on the sides away from each other. The surfaces of the positioning slide bars 15 are sleeved with positioning sleeves 16. Four positioning sleeves 16 are respectively fixedly mounted on the sides of the two mounting boxes 8 away from each other. Air nozzles 10 are fixedly mounted on the sides close to each other of the two air storage bags 11. The ends of the two air nozzles 10 that are close to each other extend to the inside of the two mounting grooves 7 respectively and are fixedly mounted with sealing air rings 9. The two sealing air rings 9 are respectively fixedly mounted in the inside of the two mounting grooves 7; a rectangular column 12 is fixedly mounted on the middle part of the sides away from each other of the two extrusion hoops 14, and a rack 13 is fixedly mounted on the bottom of the rectangular column 12 , the lower side of the rack 13 is meshed with a gear 17, and a worm wheel 18 is fixedly installed on one side of the gear 17. A rotating rod 19 is rotatably installed between the middle parts of adjacent gears 17 and worm wheels 18, and the two ends of the two rotating rods 19 are respectively fixedly connected to the inside of the two mounting boxes 8; the lower side of the worm wheel 18 is meshed with a worm 20, and the ends of the two worms 20 close to each other are rotatably installed with a shaft seat 21, and the ends of the two shaft seats 21 close to each other are fixedly installed with a connecting frame 22, and the ends of the two connecting frames 22 away from each other are fixedly connected to the inner wall of the mounting box 8, and the ends of the two worms 20 away from each other are fixedly installed with a shaft rod 23, and the surface of the shaft rod 23 is rotatably installed with a shaft sleeve 24, and the two shaft sleeves 24 are respectively fixedly connected to the two mounting boxes 8. The ends of the two shaft rods 23 away from each other extend to the outside of the mounting box 8 and are fixedly installed with a hand wheel 25.

[0020] The operator turns the two hand wheels 25 in sequence. When the hand wheels 25 rotate, they drive the shaft 23 to rotate along the inside of the shaft sleeve 24. When the shaft 23 rotates, it drives the worm 20 to rotate along the shaft seat 21. When the worm 20 rotates, it drives the worm wheel 18 to rotate. When the worm wheel 18 rotates, it drives the gear 17 to rotate along the rotating rod 19. When the gear 17 rotates, it drives the rectangular column 12 to move inward through the rack 13. When the rectangular column 12 moves inward, it drives the extrusion hoop 14 to squeeze the air bag 11. When the extrusion hoop 14 moves, it drives the positioning slide bar 15 to slide along the surface of the positioning slide sleeve 16, thereby increasing the stability of the extrusion hoop 14 when it moves. When the air bag 11 is squeezed, the gas inside it will be squeezed into the inside of the sealing air ring 9 through the air nozzle 10, thereby expanding the sealing air ring 9, thereby filling the gap, thereby achieving a very good sealing effect.

Claims

1. A double-ferrule pipe joint structure with a built-in gasket, comprising a joint body (1), characterized in that: A front ferrule (3) is inserted into the upper side of the interior of the joint body (1), and a rear ferrule (4) is inserted into the upper side of the interior of the front ferrule (3). The top of the joint body (1) is threadedly connected to a threaded sleeve (2). A gasket (5) is movably installed at the top of the interior of the threaded sleeve (2). The bottom of the gasket (5) is in close contact with the rear ferrule (4). A sealing ring (6) is fixedly installed at the upper part of the interior of the threaded sleeve (2). The inner wall of the sealing ring (6) is in close contact with the circumferential surface of the front ferrule (3) and the rear ferrule (4). Installation grooves (7) are provided in the middle of both sides of the inner wall of the threaded sleeve (2), and sealing air rings (9) are fixedly installed inside the installation grooves (7). Two installation boxes (8) are symmetrically fixedly installed on the surface of the threaded sleeve (2), and an expansion sealing assembly is provided between the two installation boxes (8).

2. A double-ferrule pipe joint structure with a built-in gasket according to claim 1, characterized in that: The expansion sealing assembly comprises two air storage bags (11), the two air storage bags (11) are respectively fixedly mounted on the inner walls of the two installation boxes (8) on the sides close to each other, the two air storage bags (11) are both tightly attached to the sides away from each other with an extrusion hoop (14), the upper and lower sides of the two extrusion hoops (14) on the sides away from each other are both fixedly mounted with positioning slide bars (15), the surfaces of the positioning slide bars (15) are both sleeved with positioning slide sleeves (16), four positioning slide sleeves (16) are respectively fixedly mounted on the sides away from each other of the two installation boxes (8), the two air storage bags (11) are both fixedly mounted on the sides close to each other with an air nozzle (10), the ends of the two air nozzles (10) close to each other respectively extend to the inside of the two installation grooves (7) and are both fixedly mounted with a sealing air ring (9), and the two sealing air rings (9) are respectively fixedly mounted inside the two installation grooves (7).

3. A double-ferrule pipe joint structure with a built-in gasket according to claim 2, characterized in that: A rectangular column (12) is fixedly installed in the middle of the two extrusion hoops (14) on the side away from each other, a rack (13) is fixedly installed at the bottom of the rectangular column (12), a gear (17) is meshed and connected at the lower side of the rack (13), a worm wheel (18) is fixedly installed on one side of the gear (17), and a rotating rod (19) is rotatably installed between the middle parts of adjacent gears (17) and worm wheels (18), and the two ends of the two rotating rods (19) are respectively fixedly connected to the inside of the two installation boxes (8).

4. A double-ferrule pipe joint structure with a built-in gasket according to claim 3, characterized in that: The lower side of the worm wheel (18) is meshedly connected with a worm (20), and the ends of the two worms (20) close to each other are rotatably mounted with a shaft seat (21), and the ends of the two shaft seats (21) close to each other are fixedly mounted with a connecting frame (22), and the ends of the two connecting frames (22) away from each other are fixedly connected to the inner wall of the installation box (8), and the ends of the two worms (20) away from each other are fixedly mounted with a shaft rod (23), and the surface of the shaft rod (23) is rotatably mounted with a shaft sleeve (24), and the two shaft sleeves (24) are respectively fixedly connected to the two installation boxes (8), and the ends of the two shaft rods (23) away from each other extend to the outside of the installation box (8) and are fixedly mounted with a hand wheel (25).

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