An intake pipe for turbocharging

Abstract

The present invention relates to the technical field of turbine inlet pipes, and particularly relates to an inlet pipe for turbocharging, which is provided with a plurality of connecting pipes. The connecting pipe includes an inner pipe and an outer pipe. The outer pipe is provided with an annular insertion groove, and the inner pipe has an annular insertion end, which is inserted into the annular insertion groove. A locking ring groove is provided inside the annular insertion end. The locking ring groove has an inner side wall and an outer side wall. A tensioning member is provided in the locking ring groove. The tensioning member includes an outer spiral spring strip and an inner spiral spring strip sleeved inside and outside. A pressing component is provided between the inner spiral spring strip and the outer spiral spring strip. The pressing component can cause the outer spiral spring strip to expand radially outward and press against the outer side wall of the locking ring groove, and at the same time cause the inner spiral strip to contract radially inward and press against the inner side wall of the locking ring groove, so that the annular insertion end expands radially and is tightly fitted with the annular insertion groove, making the inner pipe and the outer pipe uniformly stressed in the circumferential direction and improving the connection sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine inlet pipes, and particularly to an inlet pipe for turbocharging. Background Art

[0002] Automobile engines usually adopt turbocharging technology. The exhaust gas emitted by the engine drives the turbine to rotate, and then drives the intake turbine to rotate to pressurize the air. The compressed and cooled air is transmitted to the engine cylinder through an intercooler, thereby improving the fuel combustion efficiency.

[0003] The existing inlet pipes for turbocharging usually adopt plastic pipes and are fixed by means of socket connection with a clamp. However, the clamp fixation will cause uneven circumferential force on the inlet pipe, and then the local connection of the inlet pipe is not tight, which easily leads to air leakage of the inlet pipe. Summary of the Invention

[0004] Based on this, it is necessary to provide an inlet pipe for turbocharging in view of the problem that the existing inlet pipes for turbocharging are prone to air leakage.

[0005] The above object is achieved by the following technical solutions:

[0006] An inlet pipe for turbocharging is provided with a plurality of connecting pipes. The connecting pipe includes an inner pipe and an outer pipe. The outer pipe is provided with an annular insertion groove, and the inner pipe has an annular insertion end. The axes of the annular insertion end and the annular insertion groove both extend in the front-rear direction. The annular insertion end is inserted into the annular insertion groove. A locking ring groove is provided inside the annular insertion end. The locking ring groove has an inner side wall and an outer side wall. The diameter of the inner side wall is smaller than that of the outer side wall. A tensioning member is provided in the locking ring groove. The tensioning member includes an outer spiral spring strip and an inner spiral spring strip sleeved inside and outside. The diameter of the outer spiral spring strip is larger than that of the inner spiral spring strip. A pressing component is provided between the inner spiral spring strip and the outer spiral spring strip. The pressing component can make the outer spiral spring strip expand radially outward to press against the outer side wall of the locking ring groove, and at the same time make the inner spiral spring strip contract radially inward to press against the inner side wall of the locking ring groove, so that the annular insertion end expands radially and is tightly fitted with the annular insertion groove.

[0007] Further, the end of the locking ring groove close to the annular insertion groove is the rear end, the rear end of the locking ring groove is the bottom surface, the rear ends of the outer spiral spring strip and the inner spiral spring strip are both fixedly connected to the bottom surface of the locking ring groove, and the diameter of the outer spiral spring strip gradually decreases from the rear to the front, and the diameter of the inner spiral spring strip gradually increases from the rear to the front.

[0008] Furthermore, the outer spiral elastic bar and the inner spiral elastic bar have the same rotation direction, and the cross-sections of the outer spiral elastic bar and the inner spiral elastic bar are both parallelograms, the parallelogram has an inclined surface, the inclined surface of the outer spiral elastic bar extends from front to back, and the inclined surface of the inner spiral elastic bar extends from back to front.

[0009] Furthermore, the top pressure assembly includes a rotating inner ring and a driving outer ring, a support ring is provided between the rotating inner ring and the driving outer ring, the support ring is arc-shaped, two support rods are slidably provided on the support ring, and a rotating rod is rotatably provided on the support ring, in the circumferential direction of the support ring, the rotating rod is centrally located between the two support rods; the front end of the support rod is fixedly provided on the driving outer ring, and the front and rear ends of the rotating rod are respectively rotatably provided on the driving outer ring and the rotating inner ring.

[0010] Furthermore, the rear end of the support rod extends out from the rear side of the rotating inner ring and is provided with a limiting cone, the rear end of the rotating rod extends out from the rear side of the rotating inner ring and is provided with a rotating gear, the bottom surface of the locking ring groove is provided with a first rotating groove, the limiting cone and the rotating gear can rotate along the first rotating groove, the first rotating groove is provided with teeth, and the rotating gear can drive the rotating rod to rotate while rotating along the first rotating groove.

[0011] Furthermore, the rotating rod is provided with an external thread, and the supporting ring is provided with a threaded hole, and the threaded hole cooperates with the rotating rod, and the rotating rod can drive the supporting ring to slide forward and backward along the supporting rod when rotating.

[0012] Furthermore, an upper slide rail is provided on the upper side of the support ring, an upper slider is provided on the upper slide rail, and the upper slider slides unidirectionally along the upper slide rail; a lower slide rail is provided on the lower side of the support ring, a lower slider is provided on the lower slide rail, and the lower slider slides unidirectionally along the lower slide rail, an upper latch is provided in the upper slider for sliding up and down, and a lower latch is provided in the lower slider for sliding up and down, the upper latch is used to press the outer spiral spring bar; the lower latch is used to press the inner spiral spring bar.

[0013] Furthermore, an upper locking groove is provided on the front side of the upper slider, and a lower locking groove is provided on the front side of the lower slider; an upper arc-shaped long hole and a lower arc-shaped long hole are provided on the driving outer ring; the upper arc-shaped long hole corresponds to the upper locking groove front and back, and the lower arc-shaped long hole corresponds to the lower locking groove front and back.

[0014] Furthermore, a second rotating groove is provided on the inner side surface of the locking ring groove, and the inner circumferential surface of the driving outer ring is rotatably arranged in the second rotating groove. A third rotating groove is provided on the end face of the annular plug-in end, and a protrusion is provided on the rear side surface of the driving outer ring, and the protrusion is rotatably arranged in the third rotating groove. A plurality of paddles are provided on the front side surface of the driving outer ring, and the driving outer ring can be driven to rotate by the paddles.

[0015] Furthermore, an inner bone ring is provided on the inner side of the annular plug-in groove, and an outer bone ring is provided on the outer side of the annular plug-in groove, and the inner bone ring and the outer bone ring are used to support the annular plug-in groove.

[0016] The beneficial effects of the present invention are:

[0017] The turbocharger intake pipe provided by the present invention inserts the annular plug-in end of the inner pipe into the annular plug-in groove of the outer pipe, and then presses the locking ring groove of the annular plug-in end through a pressing component. Since the locking ring groove is provided with an outer spiral spring bar and an inner spiral spring bar, the pressing component can make the outer spiral spring bar expand radially outward to press the outer side wall of the locking ring groove, and at the same time make the inner spiral spring bar contract radially inward to press the inner side wall of the locking ring groove, so that the annular plug-in end expands radially and is pressed and matched with the annular plug-in groove, so that the inner pipe and the outer pipe are subjected to uniform force in the circumferential direction, avoid excessive local stress, and improve the connection and sealing effect of the inner pipe and the outer pipe.

[0018] Secondly, the outer spiral spring bar and the inner spiral spring bar can achieve double tightening, making the connection between the inner tube and the outer tube tighter and improving the connection strength between the inner tube and the outer tube.

[0019] Third, the outer spiral spring bar and the inner spiral spring bar gradually press the locking ring groove from back to front, so that the gas behind the locking ring groove can be gradually discharged forward, reducing the gas between the outer spiral spring bar and the inner spiral spring bar and the locking ring groove, thereby further improving the connection effect between the inner tube and the outer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a turbocharger intake pipe provided by an embodiment of the present invention;

[0021] Figure 2 A side view of a turbocharger intake pipe provided by an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A magnified view of the structure at center;

[0023] Figure 4 A cross-sectional view of an inner pipe in a turbocharger intake pipe provided by one embodiment of the present invention;

[0024] Figure 5 A cross-sectional view of an inner and outer pipe of a turbocharger intake pipe provided by an embodiment of the present invention;

[0025] Figure 6 A partial enlarged view of a top pressure assembly in a turbocharger intake pipe provided by an embodiment of the present invention;

[0026] Figure 7 A partial enlarged view of a tensioner in a turbocharger intake pipe provided in one embodiment of the present invention;

[0027] Figure 8 Partial structural schematic diagram of the top pressure component in the intake pipe for turbocharging provided by an embodiment of the present invention;

[0028] Figure 9 is Figure 8 exploded view of;

[0029] Figure 10 Cross-sectional view of the top pressure component in the intake pipe for turbocharging provided by an embodiment of the present invention;

[0030] Figure 11 Partial enlarged view of the driving outer ring in the intake pipe for turbocharging provided by an embodiment of the present invention;

[0031] Figure 12 Partial enlarged view of the rotating inner ring in the intake pipe for turbocharging provided by an embodiment of the present invention;

[0032] Figure 13 Exploded view of the structure of the intake pipe for turbocharging provided by an embodiment of the present invention.

[0033] Wherein:

[0034] 100, Intake pipe for turbocharging; 200, Connecting pipe; 210, Outer pipe; 211, Outer bone ring; 212, Inner bone ring; 220, Inner pipe; 221, First rotating groove; 222, Second rotating groove; 223, Third rotating groove; 230, Tensioning member; 231, Outer spiral spring strip; 232, Inner spiral spring strip; 240, Driving outer ring; 241, Rotating groove; 242, Lower arc-shaped long hole; 243, Paddle; 250, Rotating inner ring; 251, First through hole; 260, Top pressure component; 261, Support ring; 2611, Threaded hole; 2612, Second through hole; 2613, Trapezoidal limiting strip; 262, Upper slider; 2621, Third through hole; 2622, Trapezoidal groove; 2623, Upper locking groove; 263, Lower slider; 264, Rotating rod; 2641, Rotating gear; 265, Support rod; 266, Upper pin. Specific embodiments

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The serial numbers assigned to the components in this text itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] As Figures 1 to 13 shown, an intake pipe 100 for a turbocharger provided by an embodiment of the present invention is provided with a plurality of connecting pipes 200. The connecting pipe 200 includes an inner pipe 220 and an outer pipe 210. The outer pipe 210 is provided with an annular insertion groove. The inner pipe 220 has an annular insertion end. The axes of the annular insertion end and the annular insertion groove both extend in the front-rear direction. The annular insertion end is inserted into the annular insertion groove. A locking ring groove is provided inside the annular insertion end. The locking ring groove has an inner side wall and an outer side wall. The diameter of the inner side wall is smaller than that of the outer side wall. A tensioning member 230 is provided in the locking ring groove. The tensioning member 230 includes an outer spiral spring strip 231 and an inner spiral spring strip 232 which are sleeved inside and outside. The diameter of the outer spiral spring strip 231 is larger than that of the inner spiral spring strip 232. A pressing component 260 is provided between the inner spiral spring strip 232 and the outer spiral spring strip 231. The pressing component 260 can cause the outer spiral spring strip 231 to expand radially outward and press against the outer side wall of the locking ring groove, and at the same time cause the inner spiral spring strip to contract radially inward and press against the inner side wall of the locking ring groove, so that the annular insertion end expands radially and is tightly fitted with the annular insertion groove. In this embodiment, the annular insertion end is formed by bending the inner pipe 220 outward. After the annular insertion end is inserted into the annular insertion groove, the inner circumferential surfaces of the inner pipe 220 and the outer pipe 210 are flush.

[0039] In one embodiment, at the rear end of the locking ring groove near the annular insertion groove, the rear end of the locking ring groove is the bottom surface. The rear ends of the outer spiral spring strip 231 and the inner spiral spring strip 232 are both fixedly connected to the bottom surface of the locking ring groove. The diameter of the outer spiral spring strip 231 gradually decreases from the rear to the front, and the diameter of the inner spiral spring strip 232 gradually increases from the rear to the front.

[0040] In one embodiment, the outer spiral spring strip 231 and the inner spiral spring strip 232 have the same helix direction. The cross-sections of the outer spiral spring strip 231 and the inner spiral spring strip 232 are both parallelograms. The parallelogram has an inclined surface. The inclined surface of the outer spiral spring strip 231 extends from the front to the rear, and the inclined surface of the inner spiral spring strip 232 extends from the rear to the front. When the outer spiral spring strip 231 or the inner spiral spring strip 232 is pressed forward from the rear, the inclined surface will generate an axial extrusion force, so that the rear spring strip of the inner spiral spring strip 232 or the outer spiral spring strip 231 presses the front spring strip, and then the gap between the spring strips is squeezed, promoting the discharge of gas in the locking ring groove and improving the sealing performance. At the same time, the axial extrusion force can cause the annular insertion end of the inner tube 220 to deform axially, and then contact the annular insertion groove of the outer tube 210 more closely.

[0041] In this embodiment, both the outer spiral spring strip 231 and the inner spiral spring strip 232 are wound counterclockwise. In other embodiments, both the outer spiral spring strip 231 and the inner spiral spring strip 232 are wound clockwise.

[0042] In one embodiment, the pressing assembly 260 includes a rotating inner ring 250 and a driving outer ring 240. A support ring 261 is provided between the rotating inner ring 250 and the driving outer ring 240. The support ring 261 is arc-shaped. Two support rods 265 are slidably provided on the support ring 261, and a rotating rod 264 is rotatably provided on the support ring 261. In the circumferential direction of the support ring 261, the rotating rod 264 is centered between the two support rods 265. The front ends of the support rods 265 are fixedly provided on the driving outer ring 240, and the rear ends of the support rods 265 pass through the second through hole 2612 of the rotating inner ring 250. The front and rear ends of the rotating rod 264 are respectively rotatably provided on the driving outer ring 240 and the rotating inner ring 250.

[0043] In one embodiment, a limiting frustum is provided at the rear end of the support rod 265 extending out of the rotating inner ring 250. A rotating gear 2641 is provided at the rear end of the rotating rod 264 extending out of the rear side of the rotating inner ring 250. A first rotating groove 221 is provided on the bottom surface of the locking ring groove. The limiting frustum and the rotating gear 2641 can rotate along the first rotating groove 221. Teeth are provided in the first rotating groove 221. While the rotating gear 2641 rotates along the first rotating groove 221, it can drive the rotating rod 264 to rotate itself.

[0044] In one embodiment, the rotating rod 264 is provided with external threads, the support ring 261 is provided with a threaded hole 2611, the threaded hole 2611 cooperates with the rotating rod 264, and the rotation of the rotating rod 264 can drive the support ring 261 to slide back and forth along the support rod 265. The front end of the rotating rod 264 is rotatably arranged on the rotating groove 241 of the driving outer ring 240, the middle is located in the threaded hole 2611, and the rear end extends out from the first through hole 251 of the rotating inner ring 250.

[0045] In one embodiment, an upper sliding rail is provided on the upper side of the support ring 261, an upper sliding block 262 is arranged on the upper sliding rail, and the upper sliding block 262 slides unidirectionally along the upper sliding rail; a trapezoidal limiting strip 2613 is arranged on the upper sliding rail, one-way teeth are arranged on the front and rear sides of the trapezoidal limiting strip 2613, a trapezoidal groove 2622 is arranged at the bottom of the upper sliding block 262, one-way teeth are arranged in the trapezoidal groove 2622, and when viewed from front to back, the upper sliding block 262 can only slide clockwise along the upper sliding rail. A lower sliding rail is provided on the lower side of the support ring 261, a lower sliding block 263 is arranged on the lower sliding rail, the lower sliding block 263 slides unidirectionally along the lower sliding rail, the structure of the lower sliding rail is the same as that of the upper sliding rail, the structure of the lower sliding block 263 is the same as that of the upper sliding block 262, and when viewed from front to back, the lower sliding block 263 can only slide counterclockwise along the lower sliding rail.

[0046] An upper insertion pin 266 slides up and down inside the upper sliding block 262, a lower insertion pin slides up and down inside the lower sliding block 263, a spring piece is arranged between the upper insertion pin 266 and the upper sliding rail, and the spring piece makes the upper insertion pin 266 extend out from the third through hole 2621 and press against the outer spiral spring strip; a spring piece is arranged between the lower insertion pin and the lower sliding rail, and the lower insertion pin extends out from the lower sliding block 263 and presses against the inner spiral spring strip. There are two upper insertion pins 266 and two lower insertion pins, and the pressing ends of the upper insertion pins 266 and the lower insertion pins are both spherical, so as to reduce friction and facilitate the pressing cooperation with the outer spiral spring strip 231 and the inner spiral spring strip 232. In other embodiments, the spring piece can be replaced by a spring.

[0047] Limiting holes are arranged at the ends of the outer spiral spring strip 231 and the inner spiral spring strip 232. When the upper insertion pin 266 slides to the end position of the outer spiral spring strip 231 and the lower insertion pin slides to the end position of the inner spiral spring strip 232, the pressing ends of the upper insertion pin 266 and the lower insertion pin will respectively enter their respective limiting holes, and then will no longer slide relative to the outer spiral spring strip 231 or the inner spiral spring strip 232.

[0048] In one embodiment, an upper locking groove 2623 is provided on the front side of the upper slider 262, and a lower locking groove is provided on the front side of the lower slider 263; an upper arc-shaped long hole and a lower arc-shaped long hole 242 are provided on the driving outer ring 240; the upper arc-shaped long hole corresponds to the upper locking groove 2623 in the front and back, and the lower arc-shaped long hole 242 corresponds to the lower locking groove in the front and back. By inserting a screwdriver into the upper arc-shaped long hole and the upper locking groove 2623, the upper slider 262 can slide along the upper slide rail, and the upper slider 262 stops moving after sliding in place. By inserting a screwdriver into the lower arc-shaped long hole 242 and the lower locking groove, the lower slider 263 can slide along the lower slide rail, and the lower slider 263 stops moving after sliding in place.

[0049] In one embodiment, a second rotating groove 222 is provided on the inner side surface of the locking ring groove, the inner peripheral surface of the driving outer ring 240 is rotatably arranged in the second rotating groove 222, a third rotating groove 223 is provided on the end surface of the annular insertion end, a protrusion is provided on the rear side surface of the driving outer ring 240, and the protrusion is rotatably arranged in the third rotating groove 223. A plurality of paddles 243 are provided on the front side surface of the driving outer ring 240, and the driving outer ring 240 can be driven to rotate by the paddles 243.

[0050] In one embodiment, an inner bone ring 212 is provided inside the annular insertion groove, and an outer bone ring 211 is provided outside the annular insertion groove. The inner bone ring 212 and the outer bone ring 211 are used to support the annular insertion groove, so that the annular insertion groove is not easily deformed, facilitating the insertion of the annular insertion end.

[0051] Combined with the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows:

[0052] When in use, the annular plug end of the inner tube 220 is inserted into the annular plug groove of the outer tube 210, and then the outer ring 240 is driven to rotate counterclockwise through the paddle 243, thereby driving the support ring 261 and the rotating inner ring 250 to rotate counterclockwise synchronously, so that the rotating gear 2641 on the rotating rod 264 and the limiting round table on the supporting rod 265 rotate counterclockwise along the first rotating groove 221. While the rotating gear 2641 rotates along the first rotating groove 221, it can drive the rotating rod 264 to rotate, so that the rotating rod 264 drives the supporting ring 261 to slide along the supporting rod 265 from back to front, so that the upper slider 262 on the supporting ring 261 enters the inner circumference of the outer spiral spring bar 231, and the lower slider 263 enters the outer circumference of the inner spiral spring bar 232, so that the upper latch 266 shrinks. When the upper slider 262 is back to the inside of the upper slider 262, the lower latch pin is retracted into the inside of the lower slider 263; as the support ring 261 continues to rotate and move forward, the upper slider 262 of the support ring 261 continuously presses the outer spiral spring bar 231 outward, and the lower slider 263 continuously presses the inner spiral spring bar 232 inward, so that the outer spiral spring bar 231 expands radially outward to press the outer side wall of the locking ring groove, and the inner spiral spring bar contracts radially inward to press the inner side wall of the locking ring groove, so that the annular plug-in end expands radially and is then tightly connected with the annular plug-in groove; when the upper slider 262 slides to the front end of the outer spiral spring bar 231, the pressing end of the upper latch pin 266 pops out and enters the limiting hole of the outer spiral spring bar 231, and the pressing end of the lower latch pin pops out and enters the limiting hole of the inner spiral spring bar 232. Finally, use a screwdriver or other tool to extend into the upper arc-shaped long hole and the upper locking groove 2623, so that the upper slider 262 rotates clockwise on the upper slide rail, so that the upper slider 262 drives the end of the outer spiral spring bar 231 to be further tensioned outward, and use a screwdriver or other tool to extend into the lower arc-shaped long hole 242 and the lower locking groove, so that the lower slider 263 rotates counterclockwise on the lower slide rail, so that the lower slider 263 drives the end of the inner spiral spring bar 232 to be further tightened. Since the upper slider 262 slides unidirectionally on the upper slide rail, the lower slider 263 slides unidirectionally on the lower slide rail. Therefore, the upper slider 262 and the lower slider 263 cannot move in the opposite direction and thus achieve position locking, so that the outer spiral spring bar 231 and the inner spiral spring bar 232 remain in a tight state, thereby completing the sealed connection between the inner tube 220 and the outer tube 210. In this way, the inner tube 220 and the outer tube 210 are subjected to uniform force in the circumferential direction to avoid excessive local stress. At the same time, the outer spiral spring bar and the inner spiral spring bar can achieve double tightening, so that the inner tube 220 and the outer tube 210 are more tightly connected, the connection strength between the inner tube 220 and the outer tube 210 is improved, and the sealing effect of the connection between the inner tube 220 and the outer tube 210 is improved.

[0053] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A turbocharger intake pipe, characterized in that: The cam is provided with a plurality of connecting tubes, the connecting tube comprising an inner tube and an outer tube, the outer tube being provided with an annular plug-in groove, the inner tube having an annular plug-in end, the axes of the annular plug-in end and the annular plug-in groove extending in the front-rear direction, the annular plug-in end being inserted into the annular plug-in groove, the interior of the annular plug-in end being provided with a locking ring groove, the locking ring groove having an inner side wall and an outer side wall, the diameter of the inner side wall being smaller than the diameter of the outer side wall; a tensioning piece is provided in the locking ring groove, the tensioning piece comprises an outer spiral spring bar and an inner spiral spring bar arranged inside and outside, the diameter of the outer spiral spring bar being larger than the diameter of the inner spiral spring bar, a pressing component is provided between the inner spiral spring bar and the outer spiral spring bar, the pressing component can make the outer spiral spring bar expand radially outward to press the outer side wall of the locking ring groove, and at the same time make the inner spiral spring bar contract radially inward to press the inner side wall of the locking ring groove, so that the annular plug-in end is radially expanded and then pressed and matched with the annular plug-in groove.

2. The turbocharger intake pipe according to claim 1, characterized in that: The end of the locking ring groove close to the annular plug-in groove is the rear end, and the rear end of the locking ring groove is the bottom surface. The rear ends of the outer spiral spring bar and the inner spiral spring bar are fixedly connected to the bottom surface of the locking ring groove, and the diameter of the outer spiral spring bar gradually decreases from back to front, and the diameter of the inner spiral spring bar gradually increases from back to front.

3. The turbocharger intake pipe according to claim 2, characterized in that: The outer spiral elastic bar and the inner spiral elastic bar have the same rotation direction, and the cross-sections of the outer spiral elastic bar and the inner spiral elastic bar are both parallelograms, the parallelogram has an inclined surface, the inclined surface of the outer spiral elastic bar extends from front to back, and the inclined surface of the inner spiral elastic bar extends from back to front.

4. The turbocharger intake pipe according to claim 3, characterized in that: The top pressure assembly includes a rotating inner ring and a driving outer ring, a support ring is provided between the rotating inner ring and the driving outer ring, the support ring is arc-shaped, two support rods are slidably provided on the support ring, and a rotating rod is rotatably provided on the support ring, in the circumferential direction of the support ring, the rotating rod is centrally located between the two support rods; the front end of the support rod is fixedly provided on the driving outer ring, and the front and rear ends of the rotating rod are rotatably provided on the driving outer ring and the rotating inner ring respectively.

5. The turbocharger intake pipe according to claim 4, characterized in that: The rear end of the support rod extends out from the rear side of the rotating inner ring and is provided with a limiting round table. The rear end of the rotating rod extends out from the rear side of the rotating inner ring and is provided with a rotating gear. The bottom surface of the locking ring groove is provided with a first rotating groove. The limiting round table and the rotating gear can rotate along the first rotating groove. The first rotating groove is provided with teeth. The rotating gear can drive the rotating rod to rotate while rotating along the first rotating groove.

6. The turbocharger intake pipe according to claim 5, characterized in that: The rotating rod is provided with an external thread, and the supporting ring is provided with a threaded hole. The threaded hole cooperates with the rotating rod, and the rotating rod can drive the supporting ring to slide forward and backward along the supporting rod by self-rotation.

7. The turbocharger intake pipe according to claim 6, characterized in that: An upper slide rail is provided on the upper side of the support ring, an upper slider is provided on the upper slide rail, and the upper slider slides unidirectionally along the upper slide rail; a lower slide rail is provided on the lower side of the support ring, a lower slider is provided on the lower slide rail, and the lower slider slides unidirectionally along the lower slide rail; an upper latch is provided in the upper slider for sliding up and down, and a lower latch is provided in the lower slider for sliding up and down, the upper latch is used to press the outer spiral spring bar; the lower latch is used to press the inner spiral spring bar.

8. The turbocharger intake pipe according to claim 7, characterized in that: An upper locking groove is provided on the front side of the upper slider, and a lower locking groove is provided on the front side of the lower slider; an upper arc-shaped long hole and a lower arc-shaped long hole are provided on the driving outer ring; the upper arc-shaped long hole corresponds to the upper locking groove front and back, and the lower arc-shaped long hole corresponds to the lower locking groove front and back.

9. The turbocharger intake pipe according to claim 4, characterized in that: A second rotating groove is provided on the inner side surface of the locking ring groove, and the inner circumference of the driving outer ring is rotatably arranged in the second rotating groove. A third rotating groove is provided on the end surface of the annular plug-in end, and a protrusion is provided on the rear side surface of the driving outer ring, and the protrusion is rotatably arranged in the third rotating groove. A plurality of paddles are provided on the front side surface of the driving outer ring, and the driving outer ring can be driven to rotate by the paddles.

10. The turbocharger intake pipe according to claim 1, characterized in that: An inner bone ring is arranged on the inner side of the annular plug-in groove, and an outer bone ring is arranged on the outer side of the annular plug-in groove. The inner bone ring and the outer bone ring are used to support the annular plug-in groove.

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