阅读说明：本技术 一种隐藏式管件连接结构及其装拆方法 (Hidden pipe fitting connecting structure and assembling and disassembling method thereof ) 是由 张云生 于 2019-09-29 设计创作，主要内容包括：本发明提供了一种隐藏式管件连接结构及其装拆方法,属于管件连接领域。它解决了现有管件连接后密封性和稳定性差的问题。本隐藏式管件连接结构包括两根管件和连接装置,连接装置包括内连接套和两个外连接套,管件内壁设有销槽,管件端面设有外挡面,内连接套外壁设有转槽,连接装置还包括调节座和活动座,调节座包括调节套和调节板,调节板内沿套在转槽内,调节套外端面具有内挡面,活动座包括活动套,活动套和调节套螺接,活动套外端外壁设有第一密封槽和第二密封槽,外连接套上设有销孔,活动套外壁设有杆槽,杆槽内设有滑槽,滑槽内设有滑块,还包括穿设在销孔内的销杆,销杆内端与滑块固定。本连接装置能稳定连接两根管件,并能提高密封效果。(The invention provides a hidden pipe fitting connecting structure and an assembling and disassembling method thereof, and belongs to the field of pipe fitting connection. It has solved the poor problem of leakproofness and stability behind the current pipe connection. This hidden pipe connection structure includes two pipe fittings and connecting device, connecting device includes inner connecting sleeve and two outer joint covers, the pipe fitting inner wall is equipped with the keyway, the pipe fitting terminal surface is equipped with outer fender face, inner connecting sleeve outer wall is equipped with the turn trough, connecting device is still including adjusting seat and sliding seat, it includes adjusting sleeve and regulating plate to adjust the seat, along the cover in the turn trough, the outer terminal surface of adjusting sleeve has interior fender face, the sliding seat includes the movable sleeve, movable sleeve and adjusting sleeve spiro union, movable sleeve outer end outer wall is equipped with first seal groove and second seal groove, be equipped with the pinhole on the outer joint cover, the movable sleeve outer wall is equipped with the pole groove, the pole inslot is equipped with the spout, be equipped with the slider in the spout, still including wearing to establish the pin pole in the pin hole, the pin pole. The connecting device can stably connect two pipe fittings and improve the sealing effect.)

1. The utility model provides a hidden pipe connection structure, includes two pipe form pipe fittings (1) and is used for connecting the connecting device of two pipe fittings (1), connecting device includes the round cover form internal connection cover (3) and the round cover form external connection cover (2) that two shapes are the same of coaxial setting, the outer end that two external connection covers (2) were kept away from is connected with internal connection cover (3) both ends respectively, external connection cover (2) external diameter is the same with pipe fitting (1) internal diameter, external connection cover (2) internal diameter is greater than internal connection cover (3) external diameter, just two pipe fittings (1) tip cooperate the cover respectively on two external connection covers (2), its characterized in that: the inner wall of the pipe fitting (1) is coaxially provided with a circle of circular ring-shaped pin slot (12), the intersection of the end face and the outer wall of the pipe fitting (1) is provided with a circular ring-shaped inclined plane-shaped outer blocking face (11), the middle part of the outer wall of the inner connecting sleeve (3) is coaxially provided with a circular ring-shaped rotating slot (31), the connecting device further comprises two groups of connecting mechanisms, each group of connecting mechanisms comprises an adjusting seat and a movable seat, the adjusting seat comprises a circular ring-shaped adjusting sleeve (4) and a circular ring-shaped adjusting plate (41) fixed with the inner end of the adjusting sleeve (4) along the outer edge, the two adjusting plates (41) of the two groups of connecting mechanisms are sleeved in the rotating slot (31) along the rotating direction, the two adjusting plates (41) are movably attached, the outer diameter of the adjusting sleeve (4) is not more than the outer diameter of the pipe fitting (1), and the intersection of the outer, the movable seat comprises a circular sleeve-shaped movable sleeve (5), the inner end outer wall of the movable sleeve (5) and the inner wall of the adjusting sleeve (4) are respectively provided with an external thread and an internal thread which are movably connected with each other in a threaded manner, the outer end outer wall of the movable sleeve (5) is coaxially provided with a first sealing groove (51) and a second sealing groove (53) which are of a circular sleeve-shaped structure, the groove wall of the first sealing groove (51) is of a circular sleeve-shaped structure movably attached to the inner wall of the outer connecting sleeve (2), the groove wall of the second sealing groove (53) is of a circular sleeve-shaped structure movably attached to the inner wall of the pipe fitting (1), the first sealing ring (52) and the second sealing ring (54) are respectively sleeved on the first sealing groove (51) and the second sealing groove (53), the outer connecting sleeve (2) is provided with a plurality of pin holes (21) which are distributed along the circumferential direction of the outer connecting sleeve, the groove wall of the first sealing groove (51) is provided with a plurality of rod grooves (55) distributed along the circumferential direction of the movable sleeve (5), the length direction of each rod groove (55) is arranged along the axial direction of the movable sleeve (5), a sliding groove (56) with the length direction forming an angle with the axis of the movable sleeve (5) is arranged in each rod groove (55), a sliding block (23) is arranged in each sliding groove (56) in a sliding mode, the first sealing groove further comprises a pin rod (22) movably arranged in the pin hole (21) in a penetrating mode, and the inner end of each pin rod (22) is fixed with the corresponding sliding block (23);

the outer end of the pin rod (22) is embedded in the pin groove (12), the outer blocking surface (11) is abutted against the inner blocking surface (42), the upper side, the lower side, the inner side and the outer side of the first sealing ring (52) are respectively abutted against the inner end surface of the outer connecting sleeve (2), the groove bottom of the first sealing groove (51), the groove wall of the first sealing groove (51) and the inner wall of the pipe fitting (1) in a sealing manner, and the upper side, the lower side, the inner side and the outer side of the second sealing ring (54) are respectively abutted against the end surface of the pipe fitting (1), the groove bottom of the second sealing groove (53), the groove wall of the second sealing groove (53) and; and the two adjusting sleeves (4) can be respectively rotated towards opposite directions, so that the adjusting sleeves (4) drive the movable sleeve (5) to move towards the adjusting plate (41) through thread matching, the sliding block (23) moves towards the outer end of the sliding groove (56), and the outer end of the pin rod (22) moves out of the pin groove (12).

2. The hidden pipe connection structure as claimed in claim 1, wherein: the included angle between the groove bottom of the first sealing groove (51) and the groove wall of the first sealing groove (51) is an obtuse angle, and the included angle between the groove bottom of the second sealing groove (53) and the groove wall of the second sealing groove (53) is an obtuse angle.

3. The hidden pipe connection structure as claimed in claim 1, wherein: the groove bottom of the rotating groove (31) is coaxially provided with a circular third sealing groove (32), a third sealing ring (33) is sleeved in the third sealing groove (32), and the outer side of the third sealing ring (33) is respectively in sealing and abutting contact with the inner edges of the two adjusting plates (41).

4. The hidden pipe connection structure as claimed in claim 1, wherein: the two ends of the inner connecting sleeve (3) are connected with the outer ends of the two outer connecting sleeves (2) through guide plates (6) respectively, one side of each of the two opposite guide plates (6) is a guide surface (61) of a circular inclined plane structure, and the included angle between each guide surface (61) and the inner wall of the pipe fitting (1) is an obtuse angle.

5. The hidden pipe connection structure as claimed in claim 4, wherein: the inner side surface of the outer end of the movable sleeve (5) is the same as the inner side surface of the guide plate (6) facing the movable sleeve (5), the outer end surface of the movable sleeve (5) is fixed with a sealing gasket (43), and the sealing gasket (43) is sealed and abutted against the inner side surface of the guide plate (6).

6. The hidden pipe connection structure as claimed in claim 1, wherein: two adjusting collar (4) inner outer wall be equipped with circle cover form main locked groove (44) and vice locked groove (45) respectively, main locked groove (44) cell wall and vice locked groove (45) cell wall all are equipped with along the tooth's socket that circumference distributes, still include circle cover form locked collar (46), locked collar (46) inner wall is equipped with the tooth's socket meshing, locked collar (46) cooperate the cover respectively in main locked groove (44) and vice locked groove (45), make two adjusting collar (4) interlocking, and can remove locked collar (46), make locked collar (46) and vice locked groove (45) separate to whole cooperation cover is in main locked groove (44).

7. The hidden pipe connection structure as claimed in claim 1, wherein: the pin slot (12) is close to the notch of pipe fitting (1) tip and has chamfer or fillet, the internal thread of adjusting collar (4) be close to adjusting collar (4) inner setting, and adjusting collar (4) outer end inner wall be plain structure.

8. The hidden pipe connection structure as claimed in claim 4, wherein: the rotary groove (31) is formed by bending the inner connecting sleeve (3) integrally, and the inner connecting sleeve (3), the outer connecting sleeve (2) and the guide plate (6) are of an integral structure and made of hard metal materials.

9. The hidden pipe connection structure as claimed in claim 1, wherein: the outer wall of the adjusting sleeve (4) is provided with anti-skid lines and an operation mark with an arrow.

10. A method for assembling and disassembling a hidden pipe fitting connecting structure is characterized in that: the method comprises an installation method and a disassembly method:

the installation method comprises the following steps: the two pipe fittings (1) are respectively sleeved on the two outer connecting sleeves (2), the pipe fittings (1) are pushed to be in place towards a connecting device, the outer blocking surfaces (11) are abutted against the inner blocking surfaces (42), the two adjusting sleeves (4) are respectively rotated towards opposite directions, the adjusting sleeves (4) drive the reverse adjusting plates (41) of the movable sleeves (5) to move through threaded matching, the sliding blocks (23) move towards the inner ends of the sliding grooves (56), the outer ends of the pin rods (22) are moved out of the pin holes (21) and are embedded in the pin grooves (12), the two adjusting sleeves (4) are continuously rotated and tightly press the first sealing rings (52) and the second sealing rings (54), and after the pipe fittings are in place, the locking sleeves (46) are respectively matched and sleeved in the main locking grooves (44) and the auxiliary locking grooves (45), and the two adjusting sleeves (4) are mutually locked;

the disassembling method comprises the following steps: and moving the lock sleeve (46) to separate the lock sleeve (46) from the auxiliary lock groove (45), integrally matching and sleeving the lock sleeve in the main lock groove (44), respectively rotating the two adjusting sleeves (4) towards the other opposite direction, enabling the adjusting sleeves (4) to drive the movable sleeve (5) to move towards the adjusting plate (41) through thread matching, enabling the sliding block (23) to move towards the outer end of the sliding groove (56), enabling the outer end of the pin rod (22) to move out of the pin groove (12) and enter the pin hole (21), and respectively holding and mutually separating the pipe fitting (1) and the adjusting sleeve (4).

Technical Field

The invention belongs to the technical field of pipe connection, and relates to a hidden pipe connection structure and an assembling and disassembling method thereof.

Background

Two pipe fittings are in sealed butt joint, the most common mode is that the two pipe fittings are connected by adopting thread matching glue, the structure has high sealing performance, but the problem of low strength exists; in the prior application of the invention with the application number of 201910347275.5, namely the Chinese invention patent application named as 'pipe fitting sealing connection structure and connection and disassembly method thereof', a sealing connection device is arranged between the pipe fittings, the pin column of the sealing connection device is matched with the pin groove in the pipe fitting for connection, and meanwhile, the sealing gasket is pressed to realize sealing by rotating the sealing sleeve, so that the sealing structure not only has high connection strength, but also has strong sealing performance. However, it has the following problems:

1. the sealing gasket can only move axially to achieve the best sealing effect, but the sealing gasket can be driven to rotate by the rotation of the sealing gasket, so that the sealing gasket cannot achieve the best sealing effect, and even can be damaged.

2. Because the pipe fitting has elasticity, especially the end of the pipe fitting connected with the sealing connection device is easily deformed by fluid impact, so that the pin and the pin groove are separated, and the connection strength is low.

3. This sealing connection device structure is complicated, and the installation back that finishes, and the unable fixed connection hole that stabilizes of outer adapter sleeve leads to the outer adapter sleeve to receive the fluid influence then and can remove in the pipe fitting, and consequently stability is relatively poor, and the pipe fitting shake that the fluid flow caused simultaneously can make the seal cover not hard up, then can influence sealed effect again.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a hidden pipe connecting structure with higher stability and better sealing effect and an assembling and disassembling method thereof.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a hidden pipe fitting connection structure, includes two pipe form pipe fittings and is used for connecting the connecting device of two pipe fittings, and connecting device includes the same round cover form adapter sleeve of round cover form and two shapes of coaxial setting and describes the adapter sleeve outward, and the outer end that two adapter sleeves kept away from is connected with interior adapter sleeve both ends respectively, and the adapter sleeve external diameter is the same with the pipe fitting internal diameter, and the adapter sleeve internal diameter is greater than interior adapter sleeve external diameter, just two pipe fitting tip cooperate the cover respectively on two adapter sleeves, its characterized in that: the inner wall of the pipe fitting is coaxially provided with a circle of circular ring-shaped pin slot, the intersection of the end face and the outer wall of the pipe fitting is provided with a circular ring-shaped inclined plane-shaped outer blocking surface, the middle part of the outer wall of the inner connecting sleeve is coaxially provided with a circular ring-shaped rotating slot, the connecting device also comprises two groups of connecting mechanisms, each group of connecting mechanism comprises an adjusting seat and a movable seat, the adjusting seat comprises a circular ring-shaped adjusting sleeve and a circular ring-shaped adjusting plate, the outer edge of the two adjusting plates of the two groups of connecting mechanisms is rotatably sleeved in the rotating slot, the two adjusting plates are movably attached, the outer diameter of the adjusting sleeve is not larger than the outer diameter of the pipe fitting, the intersection of the outer end surface of the adjusting sleeve and the inner wall of the adjusting sleeve is provided with a circular ring-shaped inner blocking surface, the movable seat comprises a circular ring-shaped movable sleeve, the outer wall of the inner end of the movable sleeve and the inner, the groove wall of the first sealing groove is of a round sleeve structure movably attached to the inner wall of the outer connecting sleeve, the groove wall of the second sealing groove is of a round sleeve structure movably attached to the inner wall of the pipe fitting, a first sealing ring and a second sealing ring are respectively sleeved on the first sealing groove and the second sealing groove, a plurality of pin holes distributed along the circumferential direction of the outer connecting sleeve are formed in the outer connecting sleeve, the hole opening direction of each pin hole is arranged along the radial direction of the outer connecting sleeve, a plurality of rod grooves distributed along the circumferential direction of the movable sleeve are formed in the groove wall of the first sealing groove, the length direction of each rod groove is arranged along the axial direction of the movable sleeve, sliding grooves arranged in the length direction and at an angle with the axis of the movable sleeve are formed in the rod grooves, sliding blocks are arranged in the sliding grooves in a;

the outer end of the pin rod is embedded in the pin groove, the outer blocking surface is abutted against the inner blocking surface, the upper side, the lower side, the inner side and the outer side of the first sealing ring are respectively abutted against the inner end surface of the outer connecting sleeve, the bottom of the first sealing groove, the wall of the first sealing groove and the inner wall of the pipe fitting in a sealing manner, and the upper side, the lower side, the inner side and the outer side of the second sealing ring are respectively abutted against the end surface of the pipe fitting, the bottom of the second sealing groove, the wall of; and the two adjusting sleeves can be respectively rotated towards opposite directions, so that the adjusting sleeves drive the movable sleeve to move towards the adjusting plate through thread fit, the slide block moves towards the outer end of the sliding groove, and the outer end of the pin rod moves out of the pin groove.

The connecting device drives the movable sleeve to move axially along the outer connecting sleeve by rotating the adjusting sleeve, so as to respectively compress the first sealing ring and the second sealing ring, so that the first sealing ring and the second sealing ring can exert the best sealing effect, the movable sleeve cannot rotate, and the first sealing ring and the second sealing ring can be prevented from being damaged; in the scheme, the inner blocking surface of the adjusting sleeve is abutted against the outer blocking surface of the end part of the pipe fitting, so that the end part of the pipe fitting is stabilized, the end part of the pipe fitting is prevented from being impacted and deformed by fluid, and the pin rod and the pin groove can be prevented from being separated, so that the connection strength is higher, and the stability is stronger; in the scheme, the movable sleeve is driven to move by rotating the adjusting sleeve, so that the first sealing ring and the second sealing ring can be compressed, and the pin rod can stretch out and draw back, so that the operation is more convenient and stable; and this connecting device is relative background art, and the structure is simpler, can not only realize hidden installation, avoids causing the influence to the pipe fitting outside, utilizes two sets of coupling mechanism to be connected with two pipe fittings respectively simultaneously for the stable in structure after the installation, avoids outer adapter sleeve and inner adapter sleeve to remove then to produce the shake in the pipe fitting.

In the above-mentioned hidden pipe connection structure, the first seal groove tank bottom and the first seal groove cell wall contained angle be the obtuse angle, second seal groove tank bottom and second seal groove cell wall contained angle be the obtuse angle.

Therefore, after the first sealing ring and the second sealing ring are extruded, the first sealing ring and the second sealing ring are expanded, and the sealing effect of the sealing part is improved.

In the above-mentioned hidden pipe connection structure, the bottom of the rotary groove is coaxially provided with a ring-shaped third sealing groove, and a third sealing ring is sleeved in the third sealing groove, and the outer side of the third sealing ring is respectively sealed and abutted against the inner edges of the two adjusting plates.

Therefore, the sealing effect can be further improved, and the fluid is prevented from seeping out from the space between the two adjusting plates.

In the above-mentioned hidden pipe fitting connection structure, the inner connecting sleeve both ends be connected with two outer connecting sleeve outer ends through the deflector respectively, two opposite sides of deflector are the spigot surface of ring shape inclined plane structure, and spigot surface and pipe fitting inner wall contained angle are the obtuse angle.

Avoiding excessive fluid impact on the connection device.

In the above-mentioned hidden pipe connection structure, the outer end face of the movable sleeve is the same as the inner side face of the guide plate facing the movable sleeve in shape, a sealing gasket is fixed on the outer end face of the movable sleeve, and the sealing gasket abuts against the inner side face of the guide plate in a sealing manner.

Therefore, the internal sealing effect can be further improved, and the fluid is prevented from entering the connecting device.

In foretell hidden pipe fitting connection structure, two adjusting sleeve inner end outer walls be equipped with circle cover form main locked groove and vice locked groove respectively, main locked groove cell wall and vice locked groove cell wall all are equipped with along the tooth's socket of circumference distribution, still include circle cover form lock tube, the lock tube inner wall is equipped with the tooth with tooth's socket meshing, the lock tube cooperate the cover respectively and overlap in main locked groove and vice locked groove, make two adjusting sleeve mutual locking, and can remove the lock tube, make lock tube and vice locked groove separation to whole cooperation cover is at main locked groove.

Set up the lock sleeve for can lock two adjusting sleeves each other after the installation finishes, avoid the pipe fitting shake to lead to adjusting sleeve not hard up.

In the above-mentioned hidden pipe connection structure, the notch that the keyway is close to pipe ends portion has chamfer or fillet, the internal thread of adjusting collar be close to adjusting collar inner setting, and adjusting collar outer end inner wall be plain structure.

Thus facilitating installation.

In the above hidden pipe connection structure, the rotary groove is formed by bending the inner connection sleeve integrally, and the inner connection sleeve, the outer connection sleeve and the guide plate are of an integral structure and made of hard metal material.

Therefore, the structure is simple and the strength is higher.

In the above hidden pipe connection structure, the outer wall of the adjusting sleeve is provided with anti-slip lines and an operation mark with an arrow.

Thus facilitating adjustment and operation.

A method for assembling and disassembling a hidden pipe fitting connecting structure is characterized in that: the method comprises an installation method and a disassembly method:

the installation method comprises the following steps: sleeving two pipe fittings on two outer connecting sleeves respectively, pushing the pipe fittings to be in place towards a connecting device to enable the outer blocking surfaces to be abutted against the inner blocking surfaces, rotating two adjusting sleeves respectively towards opposite directions to enable the adjusting sleeves to drive a movable sleeve reverse adjusting plate to move through thread fit, enabling a sliding block to move towards the inner end of a sliding groove, enabling the outer end of a pin rod to move out of a pin hole and be embedded in a pin groove, continuously rotating the two adjusting sleeves and pressing a first sealing ring and a second sealing ring tightly, moving a lock sleeve after the pipe fittings are in place, enabling the lock sleeve to be sleeved in a main lock groove and an auxiliary lock groove respectively in a matched mode, and enabling the two adjusting sleeves to be locked mutually;

the disassembling method comprises the following steps: and moving the lock sleeve to separate the lock sleeve from the auxiliary lock groove, integrally matching and sleeving the lock sleeve in the main lock groove, respectively rotating the two adjusting sleeves in the other opposite directions, driving the movable sleeve to move towards the adjusting plate through thread matching of the adjusting sleeves, moving the sliding block towards the outer end of the sliding groove, moving the outer end of the pin rod out of the pin groove and into the pin hole, and respectively holding and mutually separating the pipe fitting and the adjusting sleeve.

By the method, the connecting device can be used for connecting two pipe fittings.

Compared with the prior art, the invention has the following advantages:

1. the connecting device drives the movable sleeve to move axially along the outer connecting sleeve by rotating the adjusting sleeve, so as to respectively compress the first sealing ring and the second sealing ring, so that the first sealing ring and the second sealing ring can exert the best sealing effect, the movable sleeve cannot rotate, and the first sealing ring and the second sealing ring can be prevented from being damaged;

2. in the scheme, the inner blocking surface of the adjusting sleeve is abutted against the outer blocking surface of the end part of the pipe fitting, so that the end part of the pipe fitting is stabilized, the end part of the pipe fitting is prevented from being impacted and deformed by fluid, and the pin rod and the pin groove can be prevented from being separated, so that the connection strength is higher, and the stability is stronger;

3. in the scheme, the movable sleeve is driven to move by rotating the adjusting sleeve, so that the first sealing ring and the second sealing ring can be compressed, and the pin rod can stretch out and draw back, so that the operation is more convenient and stable;

4. and this connecting device is relative background art, and the structure is simpler, can not only realize hidden installation, avoids causing the influence to the pipe fitting outside, utilizes two sets of coupling mechanism to be connected with two pipe fittings respectively simultaneously for the stable in structure after the installation, avoids outer adapter sleeve and inner adapter sleeve to remove then to produce the shake in the pipe fitting.

Drawings

Fig. 1 is a front view and a partial sectional view of the present connection structure.

Fig. 2 is a partially enlarged view of fig. 1.

FIG. 3 is a front view and a partial sectional view of the present joint structure in another state.

Fig. 4 is a partially enlarged view of fig. 3.

FIG. 5 is a front view and a partial sectional view of the present joint structure in another state.

Fig. 6 is a partially enlarged view of fig. 5.

In the figure, the position of the upper end of the main shaft,

1. a pipe fitting; 11. an outer baffle surface; 12. a pin slot;

2. an outer connecting sleeve; 21. a pin hole; 22. a pin rod; 23. a slider;

3. an inner connecting sleeve; 31. rotating the groove; 32. a third seal groove; 33. a third seal ring;

4. an adjusting sleeve; 41. an adjusting plate; 42. an inner baffle surface; 43. a gasket; 44. a primary lock slot; 45. a secondary lock groove; 46. a lock sleeve;

5. a movable sleeve; 51. a first seal groove; 52. a first seal ring; 53. a second seal groove; 54. a second seal ring; 55. a rod groove; 56. a chute;

6. a guide plate; 61. a guide surface.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-6, the invention relates to a hidden pipe connection structure, which comprises two circular pipe fittings 1 and a connection device for connecting the two pipe fittings 1, wherein the connection device comprises a circular sleeve-shaped inner connection sleeve 3 and two circular sleeve-shaped outer connection sleeves 2 with the same shape, which are coaxially arranged, the outer ends of the two outer connection sleeves 2, which are far away from each other, are respectively connected with the two ends of the inner connection sleeve 3, the outer diameter of each outer connection sleeve 2 is the same as the inner diameter of the pipe fitting 1, the inner diameter of each outer connection sleeve 2 is larger than the outer diameter of the inner connection sleeve 3, and the end parts of the two pipe fittings 1 are respectively sleeved on the: the inner wall of the pipe fitting 1 is coaxially provided with a circle of circular ring-shaped pin slot 12, the intersection of the end surface and the outer wall of the pipe fitting 1 is provided with a circular ring-shaped inclined plane-shaped outer blocking surface 11, the middle part of the outer wall of the inner connecting sleeve 3 is coaxially provided with a circular ring-shaped rotating slot 31, the connecting device also comprises two groups of connecting mechanisms, each group of connecting mechanism comprises a regulating seat and a movable seat, the regulating seat comprises a circular ring-shaped regulating sleeve 4 and a circular ring-shaped regulating plate 41, the outer edge of the two regulating plates 41 of the two groups of connecting mechanisms is rotatably sleeved in the rotating slot 31, the two regulating plates 41 are movably attached, the outer diameter of the regulating sleeve 4 is not larger than the outer diameter of the pipe fitting 1, the intersection of the outer end surface of the regulating sleeve 4 and the inner wall of the regulating sleeve 4 is provided with a circular ring-shaped inclined plane-shaped inner blocking surface, a first sealing groove 51 and a second sealing groove 53 of a circular sleeve structure are coaxially arranged on the outer wall of the outer end of the movable sleeve 5, the groove wall of the first sealing groove 51 is of a circular sleeve structure movably attached to the inner wall of the outer connecting sleeve 2, the groove wall of the second sealing groove 53 is of a circular sleeve structure movably attached to the inner wall of the pipe fitting 1, a first sealing ring 52 and a second sealing ring 54 are respectively sleeved on the first sealing groove 51 and the second sealing groove 53, the outer connecting sleeve 2 is provided with a plurality of pin holes 21 distributed along the circumferential direction of the outer connecting sleeve 2, the hole opening direction of the pin holes 21 is arranged along the radial direction of the outer connecting sleeve 2, the groove wall of the first sealing groove 51 is provided with a plurality of rod grooves 55 distributed along the circumferential direction of the movable sleeve 5, the rod grooves 55 are axially arranged along the movable sleeve 5, a sliding groove 56 with the length direction forming an angle with the axial line of the movable sleeve 5 is, the inner end of the pin rod 22 is fixed with the slide block 23;

the outer end of the pin rod 22 is embedded in the pin groove 12, the outer blocking surface 11 is abutted against the inner blocking surface 42, the upper, lower, inner and outer sides of the first sealing ring 52 are respectively abutted against the inner end surface of the outer connecting sleeve 2, the bottom of the first sealing groove 51, the groove wall of the first sealing groove 51 and the inner wall of the pipe fitting 1 in a sealing manner, and the upper, lower, inner and outer sides of the second sealing ring 54 are respectively abutted against the end surface of the pipe fitting 1, the bottom of the second sealing groove 53, the groove wall of the second sealing groove 53 and the; and the two adjusting sleeves 4 can be respectively rotated towards opposite directions, so that the adjusting sleeves 4 drive the movable sleeve 5 to move towards the adjusting plate 41 through threaded fit, and the slide block 23 moves towards the outer end of the sliding groove 56, so that the outer end of the pin rod 22 is moved out of the pin groove 12.

Furthermore, the included angle between the groove bottom of the first sealing groove 51 and the groove wall of the first sealing groove 51 is an obtuse angle, and the included angle between the groove bottom of the second sealing groove 53 and the groove wall of the second sealing groove 53 is an obtuse angle. The bottom of the rotary groove 31 is coaxially provided with a circular third sealing groove 32, a third sealing ring 33 is sleeved in the third sealing groove 32, and the outer side of the third sealing ring 33 is respectively and hermetically abutted against the inner edges of the two adjusting plates 41. The two ends of the inner connecting sleeve 3 are respectively connected with the outer ends of the two outer connecting sleeves 2 through the guide plates 6, one opposite side of each of the two guide plates 6 is a guide surface 61 of a circular inclined plane structure, and an included angle between each guide surface 61 and the inner wall of the pipe fitting 1 is an obtuse angle. The end surface of the outer end of the movable sleeve 5 and the inner side surface of the guide plate 6 facing the movable sleeve 5 are the same in shape, a sealing gasket 43 is fixed on the end surface of the outer end of the movable sleeve 5, and the sealing gasket 43 is in sealing and abutting contact with the inner side surface of the guide plate 6. The outer walls of the inner ends of the two adjusting sleeves 4 are respectively provided with a round sleeve-shaped main locking groove 44 and an auxiliary locking groove 45, the groove walls of the main locking groove 44 and the auxiliary locking groove 45 are respectively provided with tooth grooves distributed along the circumferential direction, the adjusting sleeve further comprises a round sleeve-shaped locking sleeve 46, the inner wall of the locking sleeve 46 is provided with teeth meshed with the tooth grooves, the locking sleeve 46 is respectively matched and sleeved in the main locking groove 44 and the auxiliary locking groove 45, the two adjusting sleeves 4 are mutually locked, the locking sleeve 46 can be moved, the locking sleeve 46 is separated from the auxiliary locking groove 45, and the whole adjusting sleeve is matched and sleeved in the main locking groove 44. The notch that cotter 12 is close to pipe fitting 1 tip has chamfer or fillet, and the internal thread of adjusting collar 4 is close to the inner setting of adjusting collar 4, and the inner wall of adjusting collar 4 outer end is plain structure. The rotary groove 31 is formed by bending the inner connecting sleeve 3 integrally, and the inner connecting sleeve 3, the outer connecting sleeve 2 and the guide plate 6 are of an integral structure and made of hard metal materials. The outer wall of the adjusting sleeve 4 is provided with anti-skid lines and an operation mark with an arrow.

Because the connecting device drives the movable sleeve 5 to move axially along the outer connecting sleeve 2 by rotating the adjusting sleeve 4, so as to respectively press the first sealing ring 52 and the second sealing ring 54, the first sealing ring 52 and the second sealing ring 54 can exert the best sealing effect, the movable sleeve 5 cannot rotate, and the first sealing ring 52 and the second sealing ring 54 can be prevented from being damaged; in the scheme, the inner blocking surface 42 of the adjusting sleeve 4 is abutted against the outer blocking surface 11 of the end part of the pipe fitting 1, so that the end part of the pipe fitting 1 is stabilized, the end part of the pipe fitting 1 is prevented from being impacted and deformed by fluid, the pin rod 22 is prevented from being separated from the pin groove 12, the connection strength is higher, and the stability is stronger; in the scheme, the rotary adjusting sleeve 4 drives the movable sleeve 5 to move, so that the first sealing ring 52 and the second sealing ring 54 can be compressed, and the pin rod 22 can stretch and retract, so that the operation is more convenient and stable; and this connecting device is relative background art, and the structure is simpler, can not only realize hidden installation, avoids causing the influence to the pipe fitting 1 outside, utilizes two sets of coupling mechanism to be connected with two pipe fittings 1 respectively simultaneously for the stable in structure after the installation avoids outer adapter sleeve 2 and inner adapter sleeve 3 to remove then to produce the shake in pipe fitting 1.

A method for assembling and disassembling a hidden pipe connecting structure comprises an assembling method and a disassembling method:

the installation method comprises the following steps: sleeving two pipe fittings 1 on two outer connecting sleeves 2 respectively, pushing the pipe fittings 1 to be in place towards a connecting device, enabling an outer blocking surface 11 to be abutted against an inner blocking surface 42, rotating two adjusting sleeves 4 towards opposite directions respectively, enabling the adjusting sleeves 4 to drive a reverse adjusting plate 41 of a movable sleeve 5 to move through thread matching, enabling a sliding block 23 to move towards the inner end of a sliding groove 56, enabling the outer ends of pin rods 22 to move out of pin holes 21 and be embedded in pin grooves 12, continuing to rotate the two adjusting sleeves 4, pressing a first sealing ring 52 and a second sealing ring 54 tightly, and moving a locking sleeve 46 after being in place, enabling the locking sleeve 46 to be sleeved in a main locking groove 44 and an auxiliary locking groove 45 in a matching mode respectively, and enabling the two adjusting sleeves 4 to be locked mutually;

the disassembling method comprises the following steps: the lock sleeve 46 is moved to separate the lock sleeve 46 from the secondary lock groove 45 and is integrally matched and sleeved in the primary lock groove 44, the two adjusting sleeves 4 are respectively rotated towards the other opposite direction, the adjusting sleeves 4 drive the movable sleeve 5 to move towards the adjusting plate 41 through thread matching, the sliding block 23 moves towards the outer end of the sliding groove 56, the outer end of the pin rod 22 moves out of the pin groove 12 and enters the pin hole 21, and the pipe fitting 1 and the adjusting sleeve 4 are respectively held and separated from each other.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms of the pipe 1, the outer stop surface 11, the pin groove 12, the outer connecting sleeve 2, the pin hole 21, the pin rod 22, the slider 23, the inner connecting sleeve 3, the rotary groove 31, the third sealing groove 32, the third sealing ring 33, the adjusting sleeve 4, the adjusting plate 41, the inner stop surface 42, the sealing pad 43, the main locking groove 44, the auxiliary locking groove 45, the locking sleeve 46, the movable sleeve 5, the first sealing groove 51, the first sealing ring 52, the second sealing groove 53, the second sealing ring 54, the rod groove 55, the sliding groove 56, the guide plate 6, the guide surface 61, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.