Taper face positioning and sealing ring extrusion double cooperative pipe fitting sealing connection structure

Abstract

The application belongs to the technical field of pipe fittings, and discloses a conical surface positioning and sealing ring extrusion double-coordinated pipe fitting sealing connection structure, which comprises an interface pipe assembly, one end of the interface pipe assembly is provided with an internal sealing pipe assembly, the end of the internal sealing pipe assembly away from the interface pipe assembly is provided with a pipe fitting assembly, and the pipe fitting assembly is externally provided with a connecting sleeve assembly. The connecting sleeve assembly is screwed to make the pipe fitting sleeve threadedly fastened on the connecting end pipe at one end close to the fixed locking tooth ring, the pipe fitting assembly is rapidly connected on the interface pipe assembly, and in the process of thread extrusion connection, the flat head pipe is inserted into the sealing sleeve in the sealing slot through the sealing pad to form primary sealing during pipe fitting connection, the sealing main pipe and the elastic sleeve pipe are inserted into the connecting end pipe to form secondary sealing during pipe fitting connection, and the internal conical ring table is extruded on the conical pipe through the elastic sleeve pipe to form tertiary sealing during pipe fitting connection.

Description

Technical Field

[0001] This invention belongs to the field of pipe fittings technology, specifically relating to a pipe fitting sealing connection structure that combines conical surface positioning and sealing ring extrusion. Background Technology

[0002] In the field of pipe connection technology, ensuring reliable sealing, structural stability, and ease of installation at the connection has always been a key research focus in the industry. Traditional pipe connection methods often rely on a single sealing structure, such as a rubber sealing ring or threads with sealant. The sealing effect is limited by installation process deviations, which can easily lead to leakage risks. Single-layer seals often cannot meet the requirements for long-term stable use.

[0003] In existing technologies, multi-layer or combined sealing designs have emerged to improve sealing performance, such as using double sealing rings or conical mating structures. However, these structures lack protection mechanisms against overload torque. During construction or maintenance, if the operator applies excessive tightening torque, it can easily lead to compression deformation of the sealing structure or even the formation of micro-cracks, causing "hidden damage" and thus affecting the long-term safe operation of the pipeline.

[0004] Furthermore, existing pipe connection structures lack effective anti-reverse locking functions when dealing with sudden changes in system pressure (such as negative pressure impacts), posing a risk of pipe loosening, especially in vertical installations or vibrating environments. Although some designs employ mechanical locking devices, these are often complex in structure, inconvenient to operate, or unable to achieve the dual functions of automatic anti-reverse and overload protection during installation.

[0005] Therefore, there is an urgent need for a pipe connection structure that combines multiple sealing, overload torsion protection, and automatic anti-reverse pipe functions, which can improve installation efficiency and safety of use while ensuring sealing reliability, and meet the urgent needs of modern pipeline systems for high-performance connections. Summary of the Invention

[0006] To address the problems mentioned in the background section, this invention provides a dual-cooperative pipe fitting sealing connection structure combining conical surface positioning and sealing ring extrusion, which features safe operation.

[0007] To achieve the above objectives, the present invention provides a dual-cooperative pipe fitting sealing connection structure of conical positioning and sealing ring compression, including an interface pipe assembly. One end of the interface pipe assembly is fitted with a built-in sealing pipe assembly, and the end of the built-in sealing pipe assembly away from the interface pipe assembly is fitted with a pipe fitting assembly. A connecting sleeve assembly is fitted outside the pipe fitting assembly. By screwing the connecting sleeve assembly onto the threaded interface pipe assembly, the built-in sealing pipe assembly is compressed and sealed within the pipe between the interface pipe assembly and the pipe fitting assembly. The connecting sleeve assembly is provided with an anti-torsion load module to prevent hidden damage to the pipe fitting due to torsional load, and one end of the connecting sleeve assembly is provided with a check valve to prevent the pipe fitting assembly from retracting. At the same end of the connecting sleeve assembly, a check valve drive assembly is provided to drive the check valve assembly.

[0008] In the preferred embodiment of the dual-cooperative sealing connection structure of conical positioning and sealing ring extrusion, the interface pipe assembly includes an interface main pipe, one end of which is fixedly provided with a connecting inner pipe and a connecting end pipe, a sealed slot is formed between the connecting end pipe and the connecting inner pipe, and the connecting end pipe is disposed around the connecting inner pipe.

[0009] The built-in sealed tube assembly includes a sealed main tube, and tapered tubes and flat-head tubes are respectively fixed at both ends of the sealed main tube.

[0010] The pipe assembly includes a main pipe, one end of which is fixedly provided with an oblique toothed tube, and the end of the oblique toothed tube away from the main pipe is fixedly provided with an elastic sleeve.

[0011] In the preferred embodiment of the conical positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure, the connecting sleeve assembly includes a pipe fitting sleeve. The outer walls of both ends of the pipe fitting sleeve are respectively fixedly provided with a fixing locking toothed ring and a sleeve end sleeve. The inner wall of the pipe fitting sleeve is fixedly provided with an inner conical ring platform. Multiple inner end plates are fixedly provided on the inner wall of the sleeve end sleeve. An arc-shaped sliding rod is fixedly provided on the inner end plate. A tightening spring is sleeved on the arc-shaped sliding rod. A T-shaped sliding groove is opened on the end face of the pipe fitting sleeve near the sleeve end sleeve. A side sliding groove is opened on the outer wall of the middle section of the pipe body of the pipe fitting sleeve.

[0012] In the preferred embodiment of the conical positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure, the anti-torsion load module includes a movable locking toothed ring, one end of which is fixedly provided with a handle sleeve, and a sliding block is fixedly provided on the inner wall of the movable locking toothed ring. A push spring is fixedly provided on the ring body of the movable locking toothed ring near the handle sleeve end.

[0013] In the preferred embodiment of the dual-cooperative pipe fitting sealing connection structure of conical positioning and sealing ring extrusion, the check valve assembly includes a check valve inclined plate, a check valve arm is fixedly provided on the check valve inclined plate, and a T-shaped slider and a check valve lever are fixedly provided on both sides of the check valve arm respectively.

[0014] The anti-return drive assembly includes a drive ring disk with multiple arc-shaped grooves. An L-shaped connecting pipe is fixedly installed at one end of the drive ring disk, and a drive end sleeve is fixedly installed at the end of the L-shaped connecting pipe away from the drive ring disk. Multiple perforated discs are provided on the side of the drive ring disk away from the L-shaped connecting pipe.

[0015] In the preferred embodiment of the conical positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure, the handle sleeve is fitted outside the middle section of the pipe body of the pipe fitting sleeve. At this time, the sliding block slides in the side sliding groove, and the two ends of the push spring abut against the movable locking tooth ring and the sleeve end sleeve respectively. Through the push of the push spring on the handle sleeve, a locking engagement structure is formed between the movable locking tooth ring and the fixed locking tooth ring.

[0016] In the preferred embodiment of the dual-cooperative sealing connection structure of conical positioning and sealing ring extrusion, the flat-headed tube is inserted into a sealed slot, and a sealing ring is placed in the sealed slot. The primary sealing between the tubes is achieved by the insertion of the flat-headed tube into the sealed slot. The elastic sleeve is inserted into the sealed main tube and the conical tube. The sealed main tube and the elastic sleeve are inserted into the connecting end tube. The elastic sleeve forms a secondary sealing between the connecting end tube and the sealed main tube. The end of the tube sleeve near the fixed locking tooth ring is threaded and tightened to the outside of the connecting end tube. At this time, the inner conical ring presses against the elastic sleeve on the outside of the conical tube and forms a tertiary sealing between the tubes.

[0017] In the preferred embodiment of the dual-cooperative sealing connection structure of conical positioning and sealing ring extrusion, the driving ring disk is rotatably mounted on the inner wall of the sleeve end sleeve via a bearing. At this time, the driving end sleeve is fitted outside the sleeve end sleeve, the T-shaped slider slides in the T-shaped groove, and the anti-return lever is inserted in the arc-shaped groove.

[0018] In the preferred embodiment of the dual-cooperative sealing connection structure of conical positioning and sealing ring extrusion, the perforated disc slides on the arc-shaped slide bar, and the two ends of the tightening spring abut against the inner end plate and the perforated disc respectively. Through the pushing of the perforated disc by the tightening spring, the driving ring disc rotates counterclockwise inside the sleeve end sleeve.

[0019] In the preferred embodiment of the conical positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure, the oblique toothed tube is inserted into the pipe fitting near the end sleeve of the sleeve. The oblique teeth of the check plate match the oblique tooth structure of the oblique toothed tube. At this time, the check plate abuts against the oblique toothed tube. Through the abutment and limitation of the check plate on the oblique toothed tube, the pipe fitting assembly forms a check pipe fitting connection structure on the connecting sleeve assembly.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The present invention involves screwing the connecting sleeve assembly so that the end of the pipe sleeve near the fixed locking toothed ring is threaded onto the connecting end pipe, thereby achieving a quick connection of the pipe assembly to the interface pipe assembly. Simultaneously, during the threaded compression connection process, the flat-head pipe forms a primary seal during pipe connection through the insert of the sealing gasket in the sealed slot, the insert of the sealed main pipe and the elastic sleeve in the connecting end pipe forms a secondary seal during pipe connection, and the inner conical ring platform forms a tertiary seal during pipe connection through the compression of the elastic sleeve on the conical pipe.

[0022] 2. The connecting sleeve assembly of the present invention is provided with an anti-torsion load module to prevent hidden damage to the pipe fitting due to torsional load. When the connecting sleeve assembly is tightened into place on the interface pipe assembly, if excessive torque is applied to the handle sleeve, the handle sleeve will overcome the pushing force of the push spring, causing the movable locking tooth ring and the fixed locking tooth ring to disengage. At this time, a torsional structure with power disconnection is formed between the handle sleeve and the pipe fitting sleeve, avoiding torque overload damage inside the pipe fitting due to continuous force after the connecting sleeve assembly is tightened into place.

[0023] 3. The connecting sleeve assembly of the present invention is provided with a check valve to prevent the pipe assembly from retracting during connection. By the check valve plate abutting and limiting the connection on the inclined toothed tube, the pipe assembly forms a check valve connection structure on the connecting sleeve assembly during connection. That is, the pipe assembly will not move backward under extreme negative pressure conditions, thereby ensuring the stability of the pipe connection. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the present invention;

[0025] Figure 2 This is a perspective view of the present invention;

[0026] Figure 3 This is a cross-sectional view of the interface tube assembly of the present invention;

[0027] Figure 4 This is a cross-sectional view of the built-in sealed tube assembly of the present invention;

[0028] Figure 5 This is a cross-sectional view of the pipe fitting assembly of the present invention;

[0029] Figure 6 This is a perspective view of the connecting sleeve assembly of the present invention;

[0030] Figure 7 This is an exploded view of the connecting sleeve assembly of the present invention;

[0031] Figure 8 This is a cross-sectional view of the connecting sleeve assembly of the present invention;

[0032] Figure 9 This is a perspective view of the check valve assembly and check valve drive assembly of the present invention.

[0033] Explanation of reference numerals in the attached drawings: 100, Interface tube assembly; 101, Interface main tube; 102, Connecting end tube; 103, Sealed slot; 104, Connecting inner tube; 200, Built-in sealed tube assembly; 201, Sealed main tube; 202, Tapered tube; 203, Flat-end tube; 300, Fitting assembly; 301, Main tube; 302, Oblique toothed tube; 303, Elastic sleeve; 400, Connecting sleeve assembly; 401, Fitting sleeve; 402, Fixed locking toothed ring; 403, Side sliding groove; 404, Movable locking toothed ring; 4 05. Handle sleeve; 406. Push spring; 407. Sliding block; 408. T-shaped slide groove; 409. Inner end plate; 410. Tightening spring; 411. Arc-shaped slide rod; 412. Sleeve end sleeve; 413. Inner cone ring platform; 500. Check valve assembly; 501. Check valve inclined plate; 502. Check valve arm; 503. T-shaped slider; 504. Check valve lever; 600. Check valve drive assembly; 601. Drive ring disc; 602. Arc-shaped slide groove; 603. L-shaped connecting pipe; 604. Drive end sleeve; 605. Perforated disc. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-9 As shown, the present invention provides a dual-cooperative pipe fitting sealing connection structure of conical positioning and sealing ring compression, including an interface pipe assembly 100, a built-in sealing pipe assembly 200 sleeved at one end of the interface pipe assembly 100, a pipe fitting assembly 300 sleeved at the end of the built-in sealing pipe assembly 200 away from the interface pipe assembly 100, and a connecting sleeve assembly 400 sleeved on the outside of the pipe fitting assembly 300. By screwing the connecting sleeve assembly 400 on the thread of the interface pipe assembly 100, the built-in sealing pipe assembly 200 is compressed and sealed in the pipeline between the interface pipe assembly 100 and the pipe fitting assembly 300. The connecting sleeve assembly 400 is provided with an anti-torsion load module to prevent hidden damage to the pipe fitting due to torsional load, and a check valve assembly 500 is provided at one end of the connecting sleeve assembly 400 to prevent the pipe fitting assembly 300 from retracting. A check valve drive assembly 600 is provided at the same end of the connecting sleeve assembly 400 to drive the check valve assembly 500.

[0036] In a preferred embodiment, please refer to Figure 3The interface tube assembly 100 includes an interface main tube 101. One end of the interface main tube 101 is fixedly provided with a connecting inner tube 104 and a connecting end tube 102. A sealed slot 103 is formed between the connecting end tube 102 and the connecting inner tube 104. The connecting end tube 102 is located around the connecting inner tube 104.

[0037] In a preferred embodiment, please refer to Figure 4 The built-in sealed tube assembly 200 includes a sealed main tube 201, and tapered tubes 202 and flat-head tubes 203 are fixedly installed at both ends of the sealed main tube 201.

[0038] In this embodiment, the flat-head tube 203 is inserted into the sealed slot 103.

[0039] In this embodiment, a sealing ring is placed inside the sealed slot 103.

[0040] In this embodiment, a primary seal between the pipes is achieved by inserting the flat-headed pipe 203 into the sealed slot 103.

[0041] In a preferred embodiment, please refer to Figure 5 The pipe fitting assembly 300 includes a main pipe 301, one end of which is fixedly provided with an oblique toothed tube 302, and the end of the oblique toothed tube 302 away from the main pipe 301 is fixedly provided with an elastic sleeve 303.

[0042] In this embodiment, the elastic sleeve 303 is inserted into the sealed main tube 201 and the tapered tube 202.

[0043] In this embodiment, the sealed main tube 201 and the elastic sleeve 303 are inserted inside the connecting end tube 102.

[0044] In this embodiment, a secondary seal is formed between the connecting end pipe 102 and the sealed main pipe 201 by means of the elastic sleeve 303.

[0045] In this embodiment, the oblique toothed tube 302 is inserted into the fitting sleeve 401 near the sleeve end sleeve 412.

[0046] In a preferred embodiment, please refer to Figures 6-8 The connecting sleeve assembly 400 includes a pipe sleeve 401. The outer walls of both ends of the pipe sleeve 401 are respectively fixedly provided with a fixing locking tooth ring 402 and a sleeve end sleeve 412. The inner wall of the pipe sleeve 401 is fixedly provided with an inner conical ring platform 413. Multiple inner end plates 409 are fixedly provided on the inner wall of the sleeve end sleeve 412. An arc-shaped sliding rod 411 is fixedly provided on the inner end plate 409. A tightening spring 410 is sleeved on the arc-shaped sliding rod 411. A T-shaped sliding groove 408 is opened on the end face of the pipe sleeve 401 near the sleeve end sleeve 412. A side sliding groove 403 is opened on the outer wall of the middle section of the pipe body of the pipe sleeve 401.

[0047] In this embodiment, the end of the pipe sleeve 401 near the fixed locking toothed ring 402 is threaded onto the outside of the connecting end pipe 102.

[0048] In this embodiment, the inner conical annular platform 413 presses against the elastic sleeve 303 on the outside of the conical tube 202 and forms a triple seal on the pipe fitting.

[0049] In a preferred embodiment, please refer to Figures 6-8 The anti-torsion load module includes a movable locking toothed ring 404, a handle sleeve 405 is fixedly installed at one end of the movable locking toothed ring 404, and a sliding block 407 is fixedly installed on the inner wall of the movable locking toothed ring 404. A push spring 406 is fixedly installed on the ring body of the movable locking toothed ring 404 near the handle sleeve 405.

[0050] In this embodiment, the sleeve 405 is fitted onto the outside of the middle section of the pipe body of the pipe fitting sleeve 401.

[0051] In this embodiment, the sliding block 407 slides within the side sliding groove 403.

[0052] In this embodiment, the two ends of the push spring 406 abut against the movable locking toothed ring 404 and the sleeve end sleeve 412, respectively.

[0053] In this embodiment, the push spring 406 pushes the handle 405, and a locking engagement structure is formed between the movable locking tooth ring 404 and the fixed locking tooth ring 402.

[0054] In a preferred embodiment, please refer to Figure 9 The check assembly 500 includes a check ramp 501, a check arm 502 is fixedly mounted on the check ramp 501, and a T-shaped slider 503 and a check lever 504 are fixedly mounted on both sides of the check arm 502 respectively.

[0055] In this embodiment, the T-shaped slider 503 slides within the T-shaped groove 408.

[0056] In this embodiment, the anti-return lever 504 is inserted into the arc-shaped groove 602.

[0057] In this embodiment, the helical teeth of the check plate 501 match the helical tooth structure of the helical toothed tube 302.

[0058] In this embodiment, the check valve 501 abuts against the oblique toothed tube 302.

[0059] In this embodiment, the pipe fitting assembly 300 forms a check valve pipe fitting connection structure on the connecting sleeve assembly 400 by the contact limiting of the check valve 501 on the oblique toothed tube 302.

[0060] In a preferred embodiment, please refer to Figure 9 The check drive assembly 600 includes a drive ring disk 601, on which multiple arc-shaped grooves 602 are provided, and an L-shaped connecting pipe 603 is fixedly provided at one end of the drive ring disk 601. A drive end sleeve 604 is fixedly provided at the end of the L-shaped connecting pipe 603 away from the drive ring disk 601, and multiple perforated disks 605 are provided on the side of the drive ring disk 601 away from the L-shaped connecting pipe 603.

[0061] In this embodiment, the drive ring disk 601 is rotatably mounted on the inner wall of the sleeve end sleeve 412 via a bearing.

[0062] In this embodiment, the drive end sleeve 604 is sleeved outside the sleeve end sleeve 412.

[0063] In this embodiment, the perforated disk 605 slides on the arc-shaped slide bar 411.

[0064] In this embodiment, the two ends of the clamping spring 410 abut against the inner end plate 409 and the perforated disc 605, respectively.

[0065] In this embodiment, the ring disc 601 is driven to rotate counterclockwise within the sleeve end sleeve 412 by the push of the perforated disc 605 by the tightening spring 410.

[0066] The working principle of this invention is as follows: Existing pipe fittings often use a sealing gasket for initial sealing during connection. However, with prolonged use or damage to the sealing gasket at a certain point, sealing failure can easily occur. To solve this problem, this invention provides an interface pipe assembly 100 with a built-in sealing pipe assembly 200 at one end. A pipe fitting assembly 300 is fitted onto the end of the built-in sealing pipe assembly 200 away from the interface pipe assembly 100. A connecting sleeve assembly 400 is fitted onto the outside of the pipe fitting assembly 300. The connection is achieved by screws on the interface pipe assembly 100 via the connecting sleeve assembly 400. Tightening causes the built-in sealing tube assembly 200 to be compressed and sealed within the pipeline between the interface tube assembly 100 and the fitting assembly 300. In actual use, the elastic sleeve 303 is fitted onto the sealing main tube 201 and the tapered tube 202. At this time, the elastic sleeve 303 wraps around the sealing main tube 201 and the tapered tube 202. The built-in sealing tube assembly 200 is then inserted into the interface tube assembly 100. At this time, the flat-head tube 203 is inserted into the sealing slot 103. During insertion, a sealing gasket is placed in the sealing slot 103. It should be noted that... When the tapered tube 202 is located at the front end of the connecting end tube 102, the sealed main tube 201 and the elastic sleeve 303 are inserted into the connecting end tube 102. After the insertion is completed, the connecting sleeve assembly 400 is turned so that the end of the sleeve 401 near the fixing locking ring 402 is threaded onto the connecting end tube 102. During the tightening process, the inner conical ring 413 inside the connecting sleeve assembly 400 abuts against and squeezes the tapered tube 202. In this way, the fitting assembly 300 is connected to the interface tube assembly 100. The quick connection is achieved, and during the threaded extrusion connection process, the flat-end tube 203 forms a primary seal during pipe connection through the sealing gasket in the sealed slot 103. The sealed main tube 201 and the elastic sleeve 303 form a secondary seal during pipe connection through the sleeve in the connecting end tube 102. The inner conical ring 413 forms a tertiary seal during pipe connection through the extrusion of the elastic sleeve 303 on the conical tube 202. Through this structure, a quick connection is achieved, while the conical surface positioning and sealing ring extrusion work together to achieve a tertiary sealing connection of the pipe.

[0067] Based on the above, when the connecting sleeve assembly 400 of the present invention is threaded onto the interface pipe assembly 100, if the operator applies excessive torque, it will cause micro-cracks and latent damage inside the connector. This latent damage gradually expands during subsequent use, eventually leading to sudden fracture. To solve this problem, the connecting sleeve assembly 400 of the present invention is equipped with an anti-torsion load module to prevent latent damage to the pipe fitting caused by torsional load. Specifically, the anti-torsion load module includes a movable locking toothed ring 404, with a handle 405 fixedly mounted at one end of the movable locking toothed ring 404, and a sliding block 407 fixedly mounted on the inner wall of the movable locking toothed ring 404. A push spring 406 is fixedly mounted on the ring body of the movable locking toothed ring 404 near the handle 405. In actual use, the movable locking toothed ring 404 and the handle 405 are fitted onto the outer pipe body of the middle section of the pipe fitting sleeve 401. At this time, the push spring 406 pushes the movable locking toothed ring 404, preventing latent damage. The movable locking toothed ring 404 engages with the fixed locking toothed ring 402, locking the handle sleeve 405 and the pipe sleeve 401 into a single unit through this engagement. In actual use, when the torque applied to the handle sleeve 405 is within a reasonable range, the engagement of the movable locking toothed ring 404 and the fixed locking toothed ring 402 causes the handle sleeve 405 to rotate, thus rotating the pipe sleeve 401. When the connecting sleeve assembly 400... After the interface pipe assembly 100 is tightened into place, if excessive torque is applied to the handle sleeve 405, the handle sleeve 405 will overcome the pushing force of the push spring 406, causing the movable locking tooth ring 404 and the fixed locking tooth ring 402 to disengage. At this time, a torsional structure with power disconnection is formed between the handle sleeve 405 and the pipe sleeve 401. Through this structure, the internal torque of the pipe is prevented from being damaged due to continuous force after the connecting sleeve assembly 400 is tightened into place.

[0068] Based on the above, under extreme negative pressure conditions, such as a sudden vacuuming or negative pressure operation of the system, the lack of connection limiting for the pipe fitting assembly 300 can also lead to instability in the connection between the pipe fitting assembly 300 and the interface pipe assembly 100, i.e., causing the pipe fitting assembly 300 to retract from the pipe connection. To solve the above problem, the present invention provides a check valve assembly 500 at one end of the connecting sleeve assembly 400 to prevent the pipe fitting assembly 300 from retracting, and a check valve drive assembly 600 on the same end of the connecting sleeve assembly 400 to drive the check valve assembly 500. Specifically, when the pipe fitting assembly 300 is inserted into the connecting sleeve assembly 400, the oblique toothed tube 302 is located inside the sleeve end sleeve 412, at which time... The push of the perforated disc 605 by the top tension spring 410 causes the drive ring disc 601 to rotate counterclockwise within the sleeve end sleeve 412. When the drive ring disc 601 rotates counterclockwise, the arc-shaped slide groove 602 drives the check plate 501 to abut against the inclined toothed tube 302 through the check rod 504. At this time, the inclined teeth of the check plate 501 match the inclined tooth structure of the inclined toothed tube 302. Through the contact and limiting of the check plate 501 on the inclined toothed tube 302, the pipe assembly 300 forms a check pipe connection structure on the connecting sleeve assembly 400 when the pipe assembly 300 is connected. That is, the pipe assembly 300 will not move backward under extreme negative pressure conditions, thereby ensuring the stability of the pipe connection.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure, including an interface pipe assembly (100), characterized in that: One end of the interface pipe assembly (100) is fitted with a built-in sealed pipe assembly (200). The end of the built-in sealed pipe assembly (200) away from the interface pipe assembly (100) is fitted with a pipe fitting assembly (300). A connecting sleeve assembly (400) is fitted outside the pipe fitting assembly (300). By screwing the connecting sleeve assembly (400) on the threaded interface pipe assembly (100), the built-in sealed pipe assembly (200) is squeezed and sealed in the pipeline between the interface pipe assembly (100) and the pipe fitting assembly (300). The connecting sleeve assembly (400) is provided with an anti-torsion load module to prevent hidden damage to the pipe fitting due to torsional load. One end of the connecting sleeve assembly (400) is provided with a check valve assembly (500) to prevent the pipe fitting assembly (300) from being disconnected. At the same end of the connecting sleeve assembly (400), a check valve drive assembly (600) is provided to drive the check valve assembly (500). The connecting sleeve assembly (400) includes a pipe sleeve (401). The outer walls of both ends of the pipe sleeve (401) are respectively fixedly provided with a locking toothed ring (402) and a sleeve end sleeve (412). The inner wall of the pipe sleeve (401) is fixedly provided with an inner conical ring platform (413). The inner wall of the sleeve end sleeve (412) is fixedly provided with a plurality of inner end plates (409). The inner end plates (409) are fixedly provided with an arc-shaped slide rod (411). The arc-shaped slide rod (411) is fitted with a tightening spring (410). A T-shaped slide groove (408) is opened on the end face of the pipe sleeve (401) near the sleeve end sleeve (412). The outer wall of the middle section of the pipe body of the pipe sleeve (401) is provided with a side sliding groove (403). The anti-torsion load module includes a movable locking toothed ring (404), one end of which is fixedly provided with a handle sleeve (405), and a sliding block (407) is fixedly provided on the inner wall of the movable locking toothed ring (404). A push spring (406) is fixedly provided on the ring body of the movable locking toothed ring (404) near the handle sleeve (405). The check valve assembly (500) includes a check valve ramp (501), a check valve arm (502) is fixedly mounted on the check valve ramp (501), and a T-shaped slider (503) and a check valve lever (504) are fixedly mounted on both sides of the check valve arm (502). The check valve drive assembly (600) includes a drive ring disc (601), on which a plurality of arc-shaped grooves (602) are provided, and an L-shaped connecting pipe (603) is fixedly provided at one end of the drive ring disc (601). A drive end sleeve (604) is fixedly provided at the end of the L-shaped connecting pipe (603) away from the drive ring disc (601), and a plurality of perforated discs (605) are provided on the side of the drive ring disc (601) away from the L-shaped connecting pipe (603).

2. The conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure according to claim 1, characterized in that: The interface tube assembly (100) includes an interface main tube (101), one end of which is fixedly provided with a connecting inner tube (104) and a connecting end tube (102). A sealed slot (103) is formed between the connecting end tube (102) and the connecting inner tube (104), and the connecting end tube (102) is disposed around the connecting inner tube (104). The built-in sealed tube assembly (200) includes a sealed main tube (201), and a tapered tube (202) and a flat-head tube (203) are respectively fixed at both ends of the sealed main tube (201). The pipe assembly (300) includes a main pipe (301), one end of which is fixedly provided with a slanted toothed tube (302), and the end of the slanted toothed tube (302) away from the main pipe (301) is fixedly provided with an elastic sleeve (303).

3. The conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure according to claim 2, characterized in that: The handle sleeve (405) is fitted onto the outside of the middle section of the pipe body of the pipe sleeve (401). At this time, the sliding block (407) slides in the side sliding groove (403). The two ends of the push spring (406) abut against the movable locking tooth ring (404) and the sleeve end sleeve (412) respectively. Through the push of the push spring (406) against the handle sleeve (405), a locking engagement structure is formed between the movable locking tooth ring (404) and the fixed locking tooth ring (402).

4. The conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure according to claim 2, characterized in that: The flat-head tube (203) is inserted into the sealed slot (103), and a sealing ring is placed in the sealed slot (103). The flat-head tube (203) is inserted into the sealed slot (103) to achieve a primary seal between the pipes. The elastic sleeve (303) is inserted into the sealed main tube (201) and the tapered tube (202). The sealed main tube (201) and the elastic sleeve (303) are inserted into the connecting end tube (102). The elastic sleeve (303) forms a secondary seal between the connecting end tube (102) and the sealed main tube (201). The end of the pipe sleeve (401) near the fixed locking tooth ring (402) is threaded and tightened on the outside of the connecting end tube (102). At this time, the inner cone ring platform (413) is pressed against the elastic sleeve (303) on the outside of the tapered tube (202) to form a tertiary seal between the pipes.

5. The conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure according to claim 2, characterized in that: The drive ring disc (601) is rotatably mounted on the inner wall of the sleeve end sleeve (412) via a bearing. At this time, the drive end sleeve (604) is sleeved on the outside of the sleeve end sleeve (412), the T-shaped slider (503) slides in the T-shaped groove (408), and the anti-return lever (504) is inserted in the arc-shaped groove (602).

6. The conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure according to claim 2, characterized in that: The perforated disc (605) slides on the arc-shaped slide bar (411), and the two ends of the clamping spring (410) abut against the inner end plate (409) and the perforated disc (605) respectively. Through the clamping spring (410) pushing the perforated disc (605), the driving ring disc (601) rotates counterclockwise inside the sleeve end sleeve (412).

7. The conical surface positioning and sealing ring extrusion dual-cooperative pipe fitting sealing connection structure according to claim 2, characterized in that: The oblique toothed tube (302) is inserted into the pipe fitting sleeve (401) near the end sleeve (412) of the sleeve. The oblique teeth of the check plate (501) match the oblique tooth structure of the oblique toothed tube (302). At this time, the check plate (501) abuts against the oblique toothed tube (302). Through the abutment and limitation of the check plate (501) on the oblique toothed tube (302), the pipe fitting assembly (300) forms a check pipe fitting connection structure on the connecting sleeve assembly (400).

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