Adapter joint with high sealing performance

Abstract

The utility model relates to the technical field of spaceflight equipment parts, in particular to a high-sealing-performance adapter substitute, which comprises a main pipe joint and an auxiliary pipe joint, the main pipe joint and the auxiliary pipe joint are sleeved together through a locking structure, and the other end of the main pipe joint and the other end of the auxiliary pipe joint are respectively communicated with a medium channel. The auxiliary pipe joint is sleeved with the main pipe joint, and an inner sealing layer is arranged in the auxiliary pipe joint and located between the inner wall of the auxiliary pipe joint and the inner wall of the main pipe joint. An outer sealing layer is arranged outside the auxiliary pipe connector and located between the outer wall of the auxiliary pipe connector and the inner wall of the main pipe connector. A clamping structure is arranged outside the main pipe joint, the clamping end of the clamping structure is clamped and fixed with the auxiliary pipe joint, and a non-return structure is arranged between the main pipe joint and the auxiliary pipe joint. According to the utility model, the technical problem of keeping high sealing performance of the adapter in the working process of aerospace equipment is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to spaceflight equipment parts technical field, specifically, relate to a high sealing property conversion joint. BACKGROUND

[0002] The conversion joint, as a kind of connecting two different interfaces component, is a device that can convert one interface into another interface. It enables different specifications or types of cables, pipelines, equipment, etc. to be connected to each other, achieving signal transmission, power delivery or fluid control functions.

[0003] The existing general conversion joint, especially pipe joint, can achieve sealing performance in general scenarios, but when used in harsh installation environment, it is difficult to ensure normal use, and has certain safety hazards.

[0004] When the conversion joint is applied to spaceflight equipment, the spacecraft will experience extreme temperature changes and pressure changes during launch, operation and return. Therefore, the conversion joint needs to withstand a wide temperature range from low temperature to high temperature and high-strength pressure, and maintain its performance stability. SUMMARY

[0005] The purpose of the present application is to provide a high sealing property conversion joint, which solves the technical problem of maintaining high sealing property of the conversion joint during the operation of spaceflight equipment.

[0006] To solve the above technical problems, the application adopts the following solutions:

[0007] A high sealing property conversion joint, comprising a main pipe joint and a secondary pipe joint, the main pipe joint and the secondary pipe joint are sleeved together through a locking structure, and the other end of the main pipe joint and the secondary pipe joint respectively communicates with a medium passage.

[0008] Preferably, the main pipe joint is sleeved outside the secondary pipe joint, and an internal sealing layer is arranged inside the secondary pipe joint, between the inner wall of the secondary pipe joint and the inner wall of the main pipe joint.

[0009] Preferably, the internal sealing layer comprises a first sealing gasket and a first pressing plate, one end of the first pressing plate penetrates one end of the first sealing gasket, and the end of the first pressing plate is wrapped in the first sealing gasket.

[0010] Preferably, an external sealing layer is arranged outside the secondary pipe joint, between the outer wall of the secondary pipe joint and the inner wall of the main pipe joint.

[0011] Preferably, the external sealing layer comprises a second sealing gasket and a second pressing plate, one end of the second pressing plate penetrates one end of the second sealing gasket, and the end of the second pressing plate is wrapped in the second sealing gasket.

[0012] Preferably, the main pipe joint is externally provided with a clamping structure, the clamping end of the clamping structure is clamped and fixed with the auxiliary pipe joint, and a check structure is arranged between the main pipe joint and the auxiliary pipe joint.

[0013] Preferably, the inner sealing layer further comprises a ring groove fixed on the inner wall of the auxiliary pipe joint, and a first sealing gasket is arranged in the groove of the ring groove, the first sealing gasket is matched with the shape of the groove of the ring groove, and the other end of a first pressing plate wrapped in the first sealing gasket is fixed on the inner wall of the main pipe joint.

[0014] Preferably, the first sealing gasket is in contact with the inner bottom surface of the groove of the ring groove.

[0015] Preferably, the outer sealing layer further comprises a ring-shaped step fixed on the outer wall of the auxiliary pipe joint, a second sealing gasket is arranged on the top surface of the ring-shaped step, and the other end of a second pressing plate wrapped in the second sealing gasket is fixed on the inner wall of the main pipe joint.

[0016] Preferably, the second sealing gasket is in contact with the top surface of the ring-shaped step.

[0017] Preferably, there is a spacing between the second pressing plate and the first pressing plate, and the pipe wall of the auxiliary pipe joint is located between the second pressing plate and the first pressing plate.

[0018] Preferably, the check structure comprises a spiral protrusion and a spiral stop sheet, the spiral stop sheet is fixedly arranged on the inner wall of the auxiliary pipe joint, and the spiral protrusion is fixedly arranged on the outer wall of the first pressing plate.

[0019] Preferably, when the main pipe joint and the auxiliary pipe joint are rotationally connected, the spiral protrusion rotates through the main pipe joint and is displaced relative to the auxiliary pipe joint until the spiral protrusion abuts against the spiral stop sheet.

[0020] Preferably, the locking structure is a threaded locking structure, and the inner wall at the connection end of the main pipe joint and the outer wall of the inner wall at the connection end of the auxiliary pipe joint are matched and locked through threads.

[0021] Preferably, the clamping structure comprises a support groove plate, a swing plate is rotationally arranged in the support groove plate, a slide column is arranged on the swing plate, a connection position and a separation position are arranged on the support groove plate, the slide column is clamped in the connection position (or the separation position), one end of the slide column is connected with an elastic assembly, the other end of the elastic assembly is connected with the support groove plate, and the swing plate is fixedly connected with one end of a grabbing rod.

[0022] Preferably, the other end of the grabbing rod is provided with a barb.

[0023] Preferably, when the main pipe joint and the auxiliary pipe joint are connected, the length direction of the grabbing rod is consistent with the length direction of the joint pipe, one end of the auxiliary pipe joint communicated with the medium pipe is provided with a clamping groove, and the barb is clamped with the clamping groove on the auxiliary pipe joint.

[0024] Preferably, the internal pipe diameter of the main pipe joint and the internal pipe diameter of the auxiliary pipe joint are both greater than the internal pipe diameter of the medium pipeline.

[0025] The technical scheme of the present application has at least the following advantages and beneficial effects:

[0026] In the utility model, the internal sealing layer is arranged to cope with the problem of pressure imbalance from the inside of the pipeline affecting the sealing during space work, and the external sealing layer is arranged to cope with the problem of high and low temperature changes from the outside of the pipeline affecting the sealing during space work, so that the sealing performance of the conversion joint in an extreme environment is ensured.

[0027] In the utility model, the locking structure and the clamping structure are arranged to achieve double fixation, so that the locking structure in the prior art is prevented from slipping off and causing unstable connection of the conversion joint.

[0028] In the utility model, the locking structure and the clamping structure are arranged to achieve double fixation, so that the locking structure in the prior art is prevented from slipping off and causing unstable connection of the conversion joint. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a sectional view structural schematic diagram of the utility model.

[0030] Figure 2 It is a sectional view structural schematic diagram of the two sealing layers in the utility model.

[0031] Figure 3 It is a sectional view structural schematic diagram of the two sealing layers in the utility model.

[0032] Figure 4 It is a sectional view structural schematic diagram of the two sealing layers in the utility model. Figure 1 It is an enlarged structural schematic diagram of A in the utility model.

[0033] Figure 5 It is a front view structural schematic diagram of the utility model.

[0034] Figure 6 It is a structural schematic diagram of the utility model.

[0035] Figure 7 It is a structural schematic diagram of the utility model from another angle.

[0036] In the figure: 1-main pipe joint, 2-secondary pipe joint, 3-internal sealing layer, 301-ring groove, 302-first sealing pad, 303-first pressing plate, 4-external sealing layer, 401-annular step, 402-second sealing pad, 403-second pressing plate, 5-check structure, 501-spiral protrusion, 502-spiral baffle, 6-clamping structure, 601-mounting plate, 602-supporting groove plate, 603-oscillating plate, 604-rotation shaft, 605-first limiting groove, 606-second limiting groove, 607-sliding column, 608-sliding groove, 609-spring, 610-rotation block, 611-plate, 612-pull rod, 613-grabbing rod, 614-clamping groove, 7-locking structure, 8-medium pipeline. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0038] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. If the orientation or position relationship indicated by the terms "center", "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship when the product of the application is usually placed, and is only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. It should also be noted that, unless otherwise explicitly specified and limited, if the terms "arrange", "mount", "connect" appear, they should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0039] EMBODIMENT

[0040] Please refer to Figures 1-6 The utility model provides a kind of conversion joint of high sealing, including main pipe joint 1, secondary pipe joint 2, internal sealing layer 3, external sealing layer 4, check structure 5, clamping structure 6, locking structure 7, medium pipeline 8.

[0041] Further, the medium channel is used for transporting various flowing media, and medium channels of different specifications are connected through the conversion joint, which includes a main pipe joint 1 and a secondary pipe joint 2. One end of the main pipe joint 1 and the secondary pipe joint 2 is respectively communicated with two different medium channels, so as to ensure the flowing and conveying of the medium.

[0042] The main pipe joint 1 and the secondary pipe joint 2 are sleeved together through the locking structure 7, so as to preliminarily fix the two pipe joints.

[0043] The locking structure 7 is a threaded locking structure 7, and the inner wall of the butt joint end of the main pipe joint 1 and the outer wall of the inner wall of the butt joint end of the secondary pipe joint 2 are locked through thread matching.

[0044] Further, please refer to Figure 2 The main pipe joint 1 is sleeved outside the secondary pipe joint 2, and the secondary pipe joint 2 is provided with an internal sealing layer 3 inside. The internal sealing layer 3 is responsible for sealing the connection gap between the two pipe joints.

[0045] The internal sealing layer 3 is located between the inner wall of the secondary pipe joint 2 and the inner wall of the main pipe joint 1. The internal sealing layer 3 includes a ring groove 301, a first sealing gasket 302 and a first pressing plate 303.

[0046] Specifically, the ring groove 301 is fixed on the inner wall of the secondary pipe joint 2. The ring groove 301 is provided with the first sealing gasket 302 in the groove. The first sealing gasket 302 is clamped into the ring groove 301 for sealing after the butt joint of the two pipe joints. The first sealing gasket 302 is matched with the groove shape of the ring groove 301.

[0047] The first pressing plate 303 is provided with one end penetrating through one end of the first sealing gasket 302 and extending into the inside of the first sealing gasket 302, so that the one end of the first pressing plate 303 is wrapped and fixed in the first sealing gasket 302. The other end of the first pressing plate 303 is fixed on the inner wall of the main pipe joint 1. The first sealing gasket 302 wrapping the end of the first pressing plate 303 is in contact with the three groove surfaces of the ring groove 301.

[0048] Preferably, when the two pipe joints are not butt jointed, the ring groove 301 is separated from the first sealing gasket 302; when the two pipe joints are butt jointed, the main pipe joint 1 is displaced close to the secondary pipe joint 2, the first pressing plate 303 in the main pipe joint 1 drives the first sealing gasket 302 to close to the ring groove 301 and clamps into the groove. The three groove surfaces of the groove can increase the sealing degree and improve the sealing performance to perform the first resealing.

[0049] The conversion joint is applied to pipe connection inside aerospace equipment. When the aerospace equipment is working, such as entering space from the ground, the aerospace equipment will experience external environmental factors such as high and low temperature, high pressure, violent jolt and sudden pressure imbalance. Therefore, the conversion joint needs to maintain sealing work in harsh environmental conditions. When the pressure imbalance occurs suddenly, there is a pressure difference between the inside and outside of the medium channel, and the sealing gasket has elasticity, so the pressure of the sealing gasket fitting place is increased, which causes the sealing performance to decrease; when high and low temperature occurs, the sealing gasket will expand or shrink, which also causes the sealing performance to decrease.

[0050] Preferably, the first sealing gasket 302 is fitted with three groove surfaces of the ring groove 301, which can increase the fitting area of the sealing gasket and improve the sealing performance; and the end of the first pressing plate 303, which is a hard structure, is wrapped in the first sealing gasket 302, so that the first sealing gasket 302 with elasticity has a hard structure inside. Therefore, when the first sealing performance is deformed due to temperature, the hard structure inside can limit the deformation amount of the first sealing gasket 302, so that it always maintains a normal deformation amount, thereby ensuring the sealing performance.

[0051] Further, the outer sealing layer 4 is arranged outside the secondary pipe joint 2, and is located between the outer wall of the secondary pipe joint 2 and the inner wall of the primary pipe joint 1. The outer sealing layer 4 is responsible for the second sealing of the connection gap between the two pipe joints, so as to ensure the sealing performance.

[0052] The outer sealing layer 4 includes an annular step 401, a second sealing gasket 402 and a second pressing plate 403.

[0053] Specifically, the annular step 401 is fixed on the outer wall of the secondary pipe joint 2, the second sealing gasket 402 is arranged on the top surface of the annular step 401, one end of the second pressing plate 403 penetrates one end of the second sealing gasket 402, and the other end of the second pressing plate 403 is wrapped and fixed in the second sealing gasket 402, and the other end of the second pressing plate 403 is fixed on the inner wall of the primary pipe joint 1.

[0054] When the primary pipe joint 1 is connected with the secondary pipe joint 2, the inner wall of the primary pipe joint 1 will slide and fit with the outer edge surface of the annular step 401 on the outer wall of the secondary pipe joint 2, so as to form a groove shape through the annular step 401 and the inner wall of the primary pipe joint 1, so that the second sealing gasket 402 seals the fitting gap between the top surface of the annular step 401 and the inner wall of the primary pipe joint 1, and forms double-layer sealing with the inner sealing layer 3.

[0055] The second pressing plate 403 is attached to the inner wall of the main pipe joint 1, and the plate surface of the first pressing plate 303 is not attached to the inner wall of the main pipe joint 1, so that there is a gap between the second pressing plate 403 and the first pressing plate 303, and the pipe wall of the secondary pipe joint 2 is located between the second pressing plate 403 and the first pressing plate 303, so that the inner and outer walls of the secondary pipe joint 2 are provided with sealing layers.

[0056] Preferably, when the adapter is working in the aerospace equipment, it will not only be affected by a single external environmental factor, for example, when the outside of the adapter is subjected to high and low temperature, the inside of the adapter will also be subjected to pressure imbalance, so a double sealing layer is arranged to cope with the external environmental factors affecting the sealing performance inside and outside the adapter, and the sealing performance of the adapter is ensured.

[0057] Further, the main pipe joint 1 is further provided with a clamping structure 6, the clamping end of the clamping structure 6 is clamped and fixed with the secondary pipe joint 2, and the main pipe joint 1 and the secondary pipe joint 2 are provided with a check structure 5.

[0058] The clamping structure 6 clamps and fixes the two pipe joints when the main pipe joint 1 and the secondary pipe joint 2 are fixed by the locking structure 7, thereby improving the stability, and the check structure 5 can prevent the main pipe joint 1 and the secondary pipe joint 2 from being separated by themselves when the clamping structure 6 and the locking structure 7 lose their functions, thereby serving as a safety guarantee for the connection of the pipe joints.

[0059] Please refer to Figure 3 The check structure 5 includes a spiral protrusion 501 and a spiral blocking piece 502, the spiral blocking piece 502 is fixedly arranged on the inner wall of the secondary pipe joint 2, and the spiral protrusion 501 is fixedly arranged on the outer wall of the first pressing plate 303; when the main pipe joint 1 and the secondary pipe joint 2 are rotationally connected, the spiral protrusion 501 rotates through the main pipe joint 1 and is displaced relative to the secondary pipe joint 2, until the spiral protrusion 501 abuts against the spiral blocking piece 502.

[0060] The spiral length of the spiral blocking piece 502 is longer than the spiral length of the spiral protrusion 501, so as to increase the check amount of the spiral blocking piece 502 to the spiral protrusion 501, and the spiral projections of the two spiral members are both arc-shaped, and the included angle of the arc is less than 180 degrees, so that the spiral protrusion 501 can be smoothly rotated to the spiral blocking piece 502.

[0061] When the adapter is connected, the spiral protrusion 501 is spirally clamped into the spiral blocking piece 502; when the locking structure 7 and the clamping structure 6 lose their functions, when the two pipe joints are separated by external force, the pipe joints will not rotate relatively, but only displace, at this time, due to the spiral clamping of the spiral protrusion 501 and the spiral blocking piece 502, the two pipe joints will not be separated in the displacement state, and the check is performed, thereby protecting the connection of the adapter.

[0062] Further, please refer toFigures 4-6 The clamping structure 6 comprises a mounting plate 601, a support groove plate 602, an oscillating plate 603, a rotating shaft 604, a first limiting groove 605, a second limiting groove 606, a sliding column 607, a sliding groove 608, a spring 609, a rotating block 610, a plate 611, a pull rod 612, a clamping rod 613, and a clamping groove 614.

[0063] Specifically, the main pipe joint 1 is fixedly provided with the mounting plate 601 at the medium channel connection end, the mounting plate 601 is fixedly provided with the support groove plate 602, the support groove plate 602 is rotatably provided with the oscillating plate 603, the oscillating plate 603 is rotatably connected with the support groove plate 602 through the rotating shaft 604, and the oscillating plate 603 oscillates around the rotating shaft 604 as the axis.

[0064] The oscillating plate 603 is provided with the sliding groove 608, the sliding groove 608 is slidably provided with the sliding column 607, the support groove plate 602 is provided with a butt joint position and a separation position, the butt joint position is the first limiting groove 605, the separation position is the second limiting groove 606, the two limiting grooves are located on the top edge of the support groove plate 602 and are grooved on the edge, and when the sliding column 607 oscillates with the oscillating plate 603, the sliding column 607 slides on the edge of the support groove plate 602 between the first limiting groove 605 and the second limiting groove 606, thereby realizing the clamping and separation functions.

[0065] The sliding column 607 is further fixedly connected with one end of an elastic assembly, the other end of the elastic assembly is fixedly connected with the rotating block 610, and the rotating block 610 is rotatably connected with the support groove plate 602. The elastic assembly is a spring 609, and the spring 609 always acts on the sliding column 607 with an elastic force, so that when the sliding column 607 slides to the butt joint position (or the separation position), the sliding column 607 is fixed in the butt joint position (or the separation position) by the elastic force.

[0066] The oscillating plate 603 is further fixedly connected with one end of the clamping rod 613, the other end of the clamping rod 613 is provided with a barb, one end of the auxiliary pipe joint 2 communicating with the medium pipeline 8 is provided with the clamping groove 614, when the clamping structure 6 is clamped, the barb of the clamping rod 613 oscillates to the clamping groove 614 and is clamped and fixed with the clamping groove 614 on the auxiliary pipe joint 2, thereby fixing the two pipe joints.

[0067] The plate 611 is further provided on both ends of the sliding column 607, and the pull rod 612 is further fixed on the other side of the plate 611. When clamping, the pull rod 612 is manually pulled, the sliding column 607 is driven to move from the separation position to the butt joint position through the pull rod 612 and the plate 611, and the barb of the clamping rod 613 is clamped with the clamping groove 614. When separation is needed, the pull rod 612 is manually pulled, the sliding column 607 is moved from the butt joint position to the separation position, and the barb of the clamping rod 613 is separated from the clamping groove 614.

[0068] When the main pipe joint 1 is connected with the auxiliary pipe joint 2, the length direction of the clamping rod 613 is consistent with the length direction of the pipe joint, so that the clamping rod 613 is as close as possible to the outside of the main pipe joint 1, thereby reducing the volume.

[0069] Please refer to Figure 1 In the embodiment, the internal diameters of the main pipe joint 1 and the auxiliary pipe joint 2 are both larger than the internal diameter of the medium pipeline 8, so that when the medium in the medium pipeline 8 flows into the two pipe joints, the flow rate of the medium is reduced and the pressure of the medium is reduced due to the sudden increase of the internal diameter, thereby reducing the pressure of the medium at the joint of the two pipe joints.

[0070] So far, the embodiments of the utility model have been described in detail. In order to avoid shielding the concept of the utility model, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions of the utility model herein according to the above description, and the scope of the utility model is defined by the appended claims.

Claims

1. A high sealing performance transition joint, comprising a main pipe joint (1) and a branch pipe joint (2), the main pipe joint (1) and the branch pipe joint (2) are sleeved together through a locking structure (7), the other ends of the main pipe joint (1) and the branch pipe joint (2) are respectively communicated with a medium channel, characterized in that ； The main pipe joint (1) is sleeved outside the auxiliary pipe joint (2), the inside of the auxiliary pipe joint (2) is provided with an internal sealing layer (3), and the internal sealing layer (3) is located between the inner wall of the auxiliary pipe joint (2) and the inner wall of the main pipe joint (1); The internal sealing layer (3) comprises a first sealing gasket (302) and a first pressing plate (303), one end of the first pressing plate (303) penetrates through one end of the first sealing gasket (302), and the end of the first pressing plate (303) is wrapped in the first sealing gasket (302); The outside of the auxiliary pipe joint (2) is provided with an external sealing layer (4), and the external sealing layer (4) is located between the outer wall of the auxiliary pipe joint (2) and the inner wall of the main pipe joint (1); The external sealing layer (4) comprises a second sealing gasket (402) and a second pressing plate (403), one end of the second pressing plate (403) penetrates through one end of the second sealing gasket (402), and the end of the second pressing plate (403) is wrapped in the second sealing gasket (402); The outside of the main pipe joint (1) is provided with a clamping structure (6), the clamping end of the clamping structure (6) is clamped and fixed with the auxiliary pipe joint (2), and a check structure (5) is arranged between the main pipe joint (1) and the auxiliary pipe joint (2).

2. A high sealing transition joint as claimed in claim 1, wherein, The internal sealing layer (3) further comprises a ring groove (301), the ring groove (301) is fixed on the inner wall of the auxiliary pipe joint (2), the first sealing gasket (302) is arranged in the groove of the ring groove (301), the first sealing gasket (302) matches the shape of the groove of the ring groove (301), and the other end of the first pressing plate (303) wrapped in the first sealing gasket (302) is fixed on the inner wall of the main pipe joint (1); The first sealing gasket (302) is in contact with the inner bottom surface of the groove of the ring groove (301).

3. The high sealing transition joint as claimed in claim 1, wherein, The external sealing layer (4) further comprises an annular step (401), the annular step (401) is fixed on the outer wall of the auxiliary pipe joint (2), the second sealing gasket (402) is arranged on the table surface of the annular step (401), and the other end of the second pressing plate (403) wrapped in the second sealing gasket (402) is fixed on the inner wall of the main pipe joint (1); The second sealing gasket (402) is in contact with the table surface of the annular step (401); There is a spacing between the second pressing plate (403) and the first pressing plate (303), and the wall of the auxiliary pipe joint (2) is located between the second pressing plate (403) and the first pressing plate (303).

4. The high sealing performance transition joint as claimed in claim 1, wherein The check structure (5) comprises a spiral protrusion (501) and a spiral baffle (502), the spiral baffle (502) is fixedly arranged on the inner wall of the auxiliary pipe joint (2), and the spiral protrusion (501) is fixedly arranged on the outer wall of the first pressing plate (303); When the main pipe joint (1) and the auxiliary pipe joint (2) are rotationally connected, the spiral protrusion (501) rotates through the main pipe joint (1) and is displaced relative to the auxiliary pipe joint (2), until the spiral protrusion (501) abuts against the spiral baffle (502).

5. The high sealing performance transition joint as claimed in claim 1, wherein The locking structure (7) is a threaded locking structure (7), and the inner wall of the connection end of the main pipe joint (1) and the inner wall of the connection end of the auxiliary pipe joint (2) are locked by thread matching.

6. The high sealing performance transition joint as claimed in claim 1, wherein The clamping structure comprises a support groove plate (602), a swing plate (603) is rotatably arranged in the support groove plate (602), a sliding column (607) is arranged on the swing plate (603), a butt joint position and a separation position are arranged on the support groove plate (602), the sliding column (607) is clamped in the butt joint position or the separation position, one end of the sliding column (607) is connected with an elastic assembly, the other end of the elastic assembly is connected with the support groove plate (602), and one end of the swing plate (603) is fixedly connected with a grabbing rod (613).

7. A high sealing transition joint as claimed in claim 6, wherein, The other end of the grabbing rod (613) is provided with a barb; When the main pipe joint (1) is butted with the auxiliary pipe joint (2), the length direction of the grabbing rod (613) is consistent with the length direction of the joint pipe, one end of the auxiliary pipe joint (2) communicated with the medium pipe (8) is provided with a clamping groove (614), and the barb is clamped with the clamping groove (614) on the auxiliary pipe joint (2).

8. The high sealing performance adapter as claimed in claim 1, wherein The internal diameters of the main pipe joint (1) and the auxiliary pipe joint (2) are all greater than the internal diameter of the medium pipe (8).

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