CN213543924U

CN213543924U - Automatic pressure tester for hydrocarbon injection pipe

Info

Publication number: CN213543924U
Application number: CN202022997559.XU
Authority: CN
Inventors: 张沙岐; 雷本贵
Original assignee: Hubei Jinma Automotive Pipeline System Co ltd
Current assignee: Hubei Jinma Automotive Pipeline System Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-06-25
Anticipated expiration: 2030-12-14

Abstract

The utility model provides an automatic pressure test machine for a hydrocarbon injection pipe, which relates to the technical field of pipeline leakage detection devices and comprises a workbench, wherein a through hole for filling pressure liquid is arranged on the workbench, a compressing component for fastening one end of the hydrocarbon injection pipe on the workbench is arranged at the through hole of the workbench, a first plugging component for plugging an opening of a special-shaped flange and a second plugging component which is detachably arranged on the workbench and is used for plugging the other end of the hydrocarbon injection pipe are also arranged on the workbench; the compressing assembly comprises a plurality of rotary cylinders which are circumferentially fixed around a convex ring of the hydrocarbon injection pipe, the rotary cylinders are fixed on the workbench, and a compressing block used for compressing the convex ring is installed on an output shaft of each rotary cylinder. The scheme has the advantages of simple operation and small risk coefficient.

Description

Automatic pressure tester for hydrocarbon injection pipe

Technical Field

The utility model relates to a technical field of pipeline leak hunting device especially relates to a hydrocarbon injection pipe automatic pressure testing machine.

Background

The automobile pipeline system comprises a brake pipeline, a steering pipeline, a clutch pump pipeline, a hydrocarbon injection pipe and the like. The hydrocarbon injection pipe is an important pipeline for treating tail gas of a diesel engine, and a certain amount of fuel oil can be injected into the hydrocarbon injection pipe in the working process of the hydrocarbon injection pipe, so that the sealing performance of the hydrocarbon injection pipe needs to be good.

Referring to fig. 6, according to the prior art, the hydrocarbon injection pipe 8 is a pipe provided with a plurality of curved sections, the hydrocarbon injection pipe 8 connects the plurality of sections of pipes together by welding, a protruding ring 81 is formed at both ends of the hydrocarbon injection pipe, an opening is formed on an outer circumferential surface of the hydrocarbon injection pipe 8 near one end, and a special-shaped flange 82 for communicating with other pipes is welded and fixed at the opening.

According to the prior art, when the hydrocarbon injection pipe is detected, firstly plugging each opening of the produced hydrocarbon injection pipe, injecting pressure gas into the pipeline, immersing the pipeline injected with the pressure gas into water, observing whether bubbles are generated in the water, and if the bubbles are generated, indicating that a leakage point exists in the pipeline; if no bubble exists, the pipeline has no leakage point.

The prior related art has the following technical defects: when the scheme is used for detecting the hydrocarbon injection pipe, the operation steps are complicated, gas filled in the pipeline needs to be released after detection, and great danger exists in the operation process.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the scheme provides the automatic pressure test machine for the hydrocarbon injection pipe, which has the advantages of simple operation and smaller danger coefficient.

According to the embodiment of the utility model, a hydrocarbon injection pipe automatic pressure testing machine, including the workstation, set up the through-hole that is used for filling pressure liquid on the workstation, install the compressing assembly that is used for fastening one of them one end of hydrocarbon injection pipe on the workstation in the through-hole department of workstation, still install the first shutoff subassembly that is used for the opening of shutoff abnormal shape flange on the workstation, can dismantle the second shutoff subassembly that is used for the shutoff hydrocarbon injection pipe other end installed on the workstation; the compressing assembly comprises a plurality of rotary cylinders which are circumferentially fixed around a convex ring of the hydrocarbon injection pipe, the rotary cylinders are fixed on the workbench, and a compressing block used for compressing the convex ring is installed on an output shaft of each rotary cylinder.

According to the technical scheme, when the manufactured hydrocarbon injection pipe needs to be detected, the hydrocarbon injection pipe to be detected is placed on the workbench, the rotary cylinder is started to be pressed on the convex ring of the hydrocarbon injection pipe, and the first plugging assembly and the second plugging assembly are started to plug the top end opening of the hydrocarbon injection pipe and the opening of the special-shaped flange respectively; through-hole through the workstation annotates pressure liquid in to hydrocarbon injection pipe, observes hydrocarbon injection pipe's surface whether there is the phenomenon of weeping, if there is the phenomenon of weeping, then explains that the pipeline has the leak source, otherwise explains that the pipeline leakproofness is good, uses the device to carry out the in-process that detects, easy operation, the process of release pressure liquid is compared in the gaseous process of release pressure safer, has improved the security of device.

Preferably, the first plugging assembly comprises a first linear telescopic cylinder and a flange plugging plug for plugging an opening of the special-shaped flange, an output shaft of the first linear telescopic cylinder is arranged opposite to the opening for plugging the special-shaped flange, and the flange plugging plug is mounted on the output shaft of the first linear telescopic cylinder.

Through above technical scheme, compare in traditional mode that uses sealing member and bolt to seal, utilize first linear expansion piece and flange to seal up the mode that blocks up the opening of heterotypic flange department and carry out the shutoff simple swift more, the process of sealing up the opening of heterotypic flange department of simplification.

Preferably, an abutting assembly used for abutting against the hydrocarbon injection pipe is further mounted on the workbench, and the abutting assembly and the first plugging assembly are oppositely arranged and flush.

Through above technical scheme, the butt subassembly is used for balancing the stress state of hydrocarbon injection pipe in heterotypic flange department, reduces the hydrocarbon injection pipe and leads to the appearance that its atress is unbalanced makes heterotypic flange department the not good condition of leakproofness appear because of the unilateral atress.

Preferably, the second shutoff subassembly is including the joint dish that is used for the joint to keep away from the one end of workstation at hydrocarbon injection pipe, fix and be used for shutoff hydrocarbon injection pipe to be close to the open-ended second linear expansion part and the port of joint dish on the joint dish and seal up the jam, and the output shaft of second linear expansion part sets up with hydrocarbon injection pipe's opening relatively, and port shutoff stopper is fixed on the output shaft of second linear expansion part.

Through above technical scheme, compare in traditional mode that uses sealing member and bolt to seal, utilize second linear expansion part and port to seal up the mode that blocks up and carry out the shutoff to the port at hydrocarbon injection pipe top simple swift more, the hydrocarbon injection pipe open-top of simplifying carries out the process of sealing, also makes things convenient for the dismouting to the device simultaneously.

Preferably, the clamping disc comprises a fixed disc parallel to the port of the hydrocarbon injection pipe, one side of the fixed disc facing the hydrocarbon injection pipe is provided with a fixed clamping piece and a movable clamping piece, the fixed clamping piece and the movable clamping piece are both arc-shaped plate-shaped members, and the sum of the angles of the fixed clamping piece and the movable clamping piece is less than or equal to one hundred eighty degrees; the fixed clamping piece is fixed on the fixed disc, the movable clamping piece is installed on the fixed disc in a sliding mode, clamping grooves used for clamping the convex rings are formed in the movable clamping piece and the fixed clamping piece, and the sliding path of the movable clamping piece passes through the position, opposite to the fixed clamping piece, of the fixed clamping piece.

Through the technical scheme, when the clamping disc is clamped at the port at the top of the hydrocarbon injection pipe, the movable clamping piece is slid to the fixed clamping piece, so that the sector angle formed by the movable clamping piece and the fixed clamping piece is less than or equal to one hundred eighty degrees, and a convex ring at the top of the hydrocarbon injection pipe is conveniently clamped in the clamping groove; after the convex ring is clamped in the clamping groove, the movable clamping piece is slid to the position corresponding to the fixed clamping piece; when the port at the top of the hydrocarbon injection pipe is plugged by starting the second linear expansion piece, the clamping disc is uniformly stressed, and the possibility of poor sealing performance at the top of the hydrocarbon injection pipe caused by nonuniform stress of the clamping disc is reduced.

Preferably, the through hole of the workbench is provided with a butting disc, the butting disc is a disc-shaped member, the middle of one plane is provided with a ring groove for positioning the convex ring, the middle of the main plane of the butting disc provided with the ring groove is also provided with a filling plug for conveniently filling pressure liquid, the filling plug is a cylindrical elastic member, and the middle of the main plane is provided with a filling hole.

Through the technical scheme, the convex ring at the bottom of the hydrocarbon injection pipe can be conveniently positioned through the annular groove; the filling plug is used for further sealing the bottom port of the hydrocarbon injection pipe and is also used for conveniently connecting a pipeline for filling pressure liquid, so that the device is more convenient to assemble.

Preferably, the workbench is fixed with a hanging rod for hanging the second plugging component.

Through above technical scheme, the hitching rod is used for conveniently hitching the second plugging component, so that the process of taking the second plugging component is more convenient.

Preferably, the hanging rod comprises a vertical rod and a bent hanging rod, and the hanging rod is bent towards the top of the device; and a hanging piece which is used for being arranged on the hanging rod in a penetrating way is fixed on the second plugging component.

Through above technical scheme, the peg that the buckle set up can reduce the possibility that drops after hanging second shutoff subassembly above that for the device is more reliable.

Preferably, the flange seal plug and the port seal plug are made of elastic materials.

Through the technical scheme, the flange sealing plug and the port sealing plug made of the elastic materials have better sealing performance, the possibility of leakage at the sealing position due to overlarge pressure of pressure liquid in the device is reduced, and the reliability of the device is further enhanced.

Preferably, the port block is a truncated cone-shaped member, and a small end of the truncated cone-shaped member faces to a side away from the second linear expansion element.

Through the technical scheme, the circular truncated cone-shaped port sealing plug can be suitable for hydrocarbon injection pipes with different diameters, and when pipelines with different diameters or different diameters are detected, the device can have good sealing performance, and the applicability of the device is improved.

Compared with the prior art, the utility model discloses one of following beneficial effect has at least:

1. the compression assembly, the first plugging assembly and the second plugging assembly are used for compressing and sealing the hydrocarbon injection pipe to be detected, so that the process of installing the hydrocarbon injection pipe is more convenient and faster;

2. the detection is carried out by utilizing the direction of filling the pressure liquid into the pipeline, so that the detection process of the pipeline is safer;

3. utilize butt subassembly, be provided with the joint dish that moves the joint spare to make the pipeline atress when carrying out the shutoff more balanced, reduce the pipeline because of unilateral atress, lead to the not good possibility of sealing performance.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic view of a configuration with a hydrocarbon injection string and a second plugging assembly removed;

FIG. 3 is a schematic structural view of the abutting disk;

FIG. 4 is an enlarged view of portion A of FIG. 2;

FIG. 5 is a partial exploded view between a hydrocarbon injection string and a second plugging assembly;

fig. 6 is a structural schematic of a prior art hydrocarbon injection pipe.

In the above drawings: 1. a work table; 11. a desktop; 12. a support pillar; 2. a compression assembly; 21. a rotating cylinder; 22. a compression block; 3. a first plugging component; 31. a first linear expansion member; 32. sealing and blocking the flange; 33. a first mounting seat; 4. an abutment assembly; 41. a second mounting seat; 42. an abutting member; 5. a second plugging component; 51. a clamping disc; 511. fixing the disc; 512. Fixing a clamping piece; 513. a movable clamping piece; 514. a clamping groove; 515. a chute; 52. a second linear expansion member; 53. sealing and blocking the port; 54. hanging and connecting pieces; 6. hanging a connecting rod; 61. erecting a rod; 62. a hanging rod; 7. a butting tray; 71. a ring groove; 72. filling a plug; 721. filling holes; 8. a hydrocarbon injection pipe; 81. a convex ring; 82. a special-shaped flange.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

An automatic pressure test machine for a hydrocarbon injection pipe, which is shown in figure 1, comprises a workbench 1, a pressing assembly 2 arranged on the workbench 1 and used for pressing a convex ring 81 at the bottom of the hydrocarbon injection pipe 8, a first plugging assembly 3 and a second plugging assembly 5 used for plugging an abnormal flange of the hydrocarbon injection pipe 8 and an opening at the top of the abnormal flange; the device is used for compressing and sealing the hydrocarbon injection pipe 8, then pressure liquid is filled into the pipeline, and whether the surface of the pipeline has a liquid leakage phenomenon or not is observed so as to check whether a leakage point exists on the pipeline or not. The device is used for detecting the leakage of the hydrocarbon injection pipe 8, so that the installation process of a pipeline can be simplified, and meanwhile, when pressure liquid is released after detection, the device is safer and more reliable compared with the process of releasing after pressure gas is used, and the reliability of the device is improved.

Referring to fig. 2 and 3, the workbench 1 includes a table top 11 and a plurality of support columns 12 fixed on one side of the table top 11 for supporting, the table top 11 is a flat member, the support columns 12 are strip members, the table top 11 is made of rectangular steel plates, the support columns 12 are made of four square steels and are respectively fixed at four corners of one main plane of the table top 11, and the support columns 12 can be fixed on the table top 11 by welding or bolts.

The middle part of the table top 11 is provided with a through hole for filling pressure liquid, the through hole is provided with a butting disc 7 for positioning and sealing the bottom opening of the hydrocarbon injection pipe 8, the butting disc 7 is a disc-shaped member, the middle part of the butting disc 7 is provided with a ring groove 71 for positioning a convex ring 81 of the hydrocarbon injection pipe 8, and the ring groove 71 is matched and attached with the flange 81. The middle part of the main plane of the abutting disc 7 provided with the ring groove 71 is fixed with a filling plug 72, the filling plug 72 can be fixed on the abutting disc 7 by bolts or bonding, the filling plug 72 is a cylindrical component with the diameter equal to the diameter of the inner hole of the pipeline, and a filling hole 721 for filling pressure liquid is arranged in the middle part along the length direction of the axis of the filling plug. The abutting disc 7 can be made of hard plastics, the filling plug 72 can be made of elastic rubber, and the filling plug 72 made of the elastic rubber can enable the sealing performance between the outer circular surface of the filling plug 72 and the inner wall of the port of the hydrocarbon injection pipe 8 to be better.

Install on workstation 1 and be used for compressing tightly subassembly 2 that compresses tightly the bulge loop 81 of hydrocarbon injection pipe 8 bottom, compress tightly subassembly 2 and include a plurality of rotatory jar 21 that set up around butt-joint dish 7 and set up the compact heap 22 on the output shaft of rotatory jar 21, adopt three rotatory jar 21 here, rotatory jar 21 can adopt with the rotatory cylinder or the rotatory hydro-cylinder of market purchase, rotatory jar 21 passes through the bolt fastening on workstation 1, the length direction of the output shaft of rotatory jar 21 is perpendicular to the plane that bulge loop 81 belongs to.

The pressing block 22 is a cuboid-shaped component, the length direction of the pressing block 22 is perpendicular to the length direction of the output shaft of the rotating cylinder 21, the pressing block 22 is fixed on the output shaft of the rotating cylinder 21 through bolts, a plurality of pressing blocks 22 with different thicknesses can be staggered, overlapped and fixed together according to the height of the convex ring 81 at the bottom of the field hydrocarbon injection pipe 8, and when the pressing block 22 is manufactured, one side, abutted to the bottom of the convex ring 81, of the pressing block 22 is formed into an inclined surface, so that the pressing block 22 presses the pipeline through the driving movement of the rotating cylinder 21 to the position right above the convex ring 82.

The first plugging assembly 3 comprises a first linear expansion piece 31 and a flange plugging plug 32, wherein the first linear expansion piece 31 is horizontally arranged, the flange plugging plug 32 is used for plugging an opening of a special-shaped flange 82, the first linear expansion piece 31 is arranged at the opening of the special-shaped flange 82 of the hydrocarbon injection pipe 8, an output shaft of the first linear expansion piece 31 is opposite to a port of the special-shaped flange 82, and the first linear expansion piece 31 can adopt a commercially available air cylinder or oil cylinder. In order to facilitate the horizontal installation of the first linear expansion piece 31, a first installation seat 33 is further installed on the tabletop 11, the first installation seat 33 can be made of a steel plate or a member with an L-shaped cross section, the first installation seat 33 is fixed on the tabletop 11 through a bolt, and the first linear expansion piece 31 is horizontally fixed on the first installation seat 33 through a bolt.

The flange seal 32 is a disc-shaped member, the flange seal 32 is made of elastic rubber, and the flange seal 32 can be coaxially fixed on the end face of the output shaft of the first linear expansion element 31 by bolts.

When an opening at the special-shaped flange 82 of the hydrocarbon injection pipe 8 needs to be sealed, the first linear expansion piece 31 is started, the flange sealing plug 32 is pushed to be abutted against the special-shaped flange 82, and the sealing effect can be achieved, and the flange sealing plug 32 made of elastic rubber has a better sealing effect.

Referring to fig. 2 and 4, an abutting assembly 4 used for abutting against the hydrocarbon injection pipe 8 is further arranged on the tabletop 11, the abutting assembly 4 comprises a second installation seat 41 and an abutting piece 42 used for abutting against the hydrocarbon injection pipe 8, the second installation seat 41 and the abutting piece 42 are both members with L-shaped cross sections, the second installation seat 41 and the abutting piece 42 are both made of steel plates through welding, the second installation seat 41 is fixed on the tabletop 11 through bolts, the abutting piece 42 is fixed on the second installation seat 41 through bolts, the abutting piece 42 is arranged opposite to the flange sealing plug 32, and the height of the abutting piece 42 is flush with the special-shaped flange 82.

When the hydrocarbon injection pipe 8 is under the action force of the first plugging assembly 3, the abutting assembly 4 is used for balancing the stress state of the hydrocarbon injection pipe 8, so that the stress of the hydrocarbon injection pipe 8 at the position of the special-shaped flange 82 is more uniform, and the possibility that the sealing performance of the hydrocarbon injection pipe 8 at the special-shaped flange 82 is poor due to the fact that the hydrocarbon injection pipe 8 is stressed on one side at the special-shaped flange 82 is reduced.

Referring to fig. 1 and 5, the second plugging assembly 5 is used for plugging a top port of a hydrocarbon injection pipe 8, and the second plugging assembly 5 comprises a clamping disc 51 for clamping and fixing a convex ring 81 at the top of the hydrocarbon injection pipe 8, a second linear expansion piece 52 installed on the clamping disc 51 and a port plugging block 53 for plugging an opening at the top end of the hydrocarbon injection pipe 8.

The clamping disc 51 comprises a disc-shaped fixed disc 511, a fixed clamping piece 512 and a movable clamping piece 513, wherein the fixed disc 511 is a disc-shaped component parallel to the top end face of the hydrocarbon injection pipe 8, the fixed disc 511 can be made of a steel plate, a semi-annular sliding groove 515 arranged in one hundred eighty degrees is formed in one main plane of the fixed disc 511, the movable clamping piece 512 and the fixed clamping piece 513 are both arc-shaped plate-shaped components with the radius equal to that of the sliding groove 515, and when the fixed clamping piece 512 and the movable clamping piece 513 are made, the sum of fan-shaped angles of the fixed clamping piece 512 and the movable clamping piece 513 is required to be less than or equal to one hundred.

The fixing and clamping piece 512 can be fixed on the main plane of the fixing disc 511 facing the hydrocarbon injection pipe 8 by adopting a welding fixing mode or a bolt fixing mode, the orthographic projection pattern of the fixing and clamping piece 512 on the fixing disc 511 is on the same circle with the sliding groove 515, and the fixing and clamping piece 512 can be partially overlapped with the sliding groove 515; the movable clamping piece 513 is slidably mounted in the sliding groove 515 by a bolt.

The inner side walls of the fixed clamping piece 512 and the movable clamping piece 513 are provided with clamping grooves 514 for clamping the convex ring 81 at the top of the hydrocarbon injection pipe 8, and the clamping grooves 514 are annular sinking grooves with right trapezoid cross sections.

The convex ring 81 at the top of the hydrocarbon injection pipe 8 can be conveniently clamped in the clamping groove 514 by the clamping disc 51 with the structure.

The second linear expansion piece 52 can be a commercially available air cylinder or oil cylinder, a through hole is formed in the middle of the fixed disk 511, the second linear expansion piece 52 is fixed on one surface of the fixed disk 511, which is far away from the hydrocarbon injection pipe 8, through a bolt, and an output shaft of the second linear expansion piece slides and penetrates through the through hole of the fixed disk 511 and extends out of the through hole to form an extending end.

The port plug 53 is a circular truncated cone-shaped elastic member, the port plug 53 may be made of elastic rubber, a small end of the port plug is disposed toward the hydrocarbon injection pipe 8, and the port plug 53 is fixed to the extending end of the second linear expansion element 52 by a bolt. The elastic truncated cone-shaped port sealing plug 53 can be used for enabling the sealing performance between the elastic truncated cone-shaped port sealing plug 53 and the top port of the hydrocarbon injection pipe 8 to be better, and meanwhile, the truncated cone-shaped port sealing plug 53 can be suitable for pipelines with different diameters.

When the second plugging assembly 5 is used for clamping the hydrocarbon injection pipe 8, the movable clamping piece 513 is slid to one side, so that the sector angle formed by the fixed clamping piece 512 and the movable clamping piece 513 is less than or equal to one hundred eighty degrees, and after the convex ring 81 at the top of the hydrocarbon injection pipe 8 is clamped and fixed, the movable clamping piece 513 is moved to the position corresponding to the fixed clamping piece 512; activation of second linear expansion 52 drives port seal 53 to seal off the top port of hydrocarbon injection line 8. The process of plugging the top of the hydrocarbon injection pipe 8 is more convenient.

Referring to fig. 1 and 5, a hanging member 54 is installed at the tail of the second linear expansion member 52, the hanging member 54 may be made of plastic material and bent into a U shape, and is made of iron sheet, and the hanging member 54 is fixed to the second linear expansion member 52 by bolts; still install the articulate pole 6 that is used for articulating second shutoff subassembly 5 on workstation 1, articulate pole 6 and include the pole setting 61 of vertical setting and the peg 62 towards the crooked setting in top of device, pole setting 61 and peg 62 all can adopt the round steel preparation, and peg 62 adopts welded fastening's mode to fix in the top position department of pole setting 61, and it can adopt bolt fastening or welded fastening to hang and connect pole 6 on workstation 1.

The hanging member 54 can facilitate hanging the second plugging assembly 5 on the device when not in use, and the hanging rod 62 arranged in a bent manner can reduce the possibility of falling.

The application discloses automatic pressure testing machine of hydrocarbon injection pipe's implementation principle does: the bottom end of a hydrocarbon injection pipe 8 to be detected is placed on the abutting disc 7 for positioning, the rotary cylinder 21 is started to drive the pressing block 22 to press the convex ring 81 at the bottom of the hydrocarbon injection pipe 8, the first linear expansion piece 31 is started to drive the flange plug 32 to move, and the opening at the special-shaped flange 82 is plugged under the mutual matching of the abutting components 4; take off second shutoff subassembly 5 from articulate pole 6, with the joint of second shutoff subassembly 5 at hydrocarbon injection pipe 8's top, start second linear expansion part 52 and drive port shutoff and block up 53 and carry out the shutoff to hydrocarbon injection pipe 8's top port.

The pressure liquid is filled into the hydrocarbon injection pipe 8 through the filling hole 721 of the filling plug 72, the pressure liquid at the position adopts water, whether the surface of the hydrocarbon injection pipe 8 has a water leakage phenomenon or not is observed, if the water leakage phenomenon exists, a leakage point exists in a pipeline, otherwise, the pipeline has good sealing performance, and in the detection process by using the device, the operation is simple, the process of releasing the pressure liquid is safer than the process of releasing pressure gas, and the safety and the reliability of the device are improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a hydrocarbon injection pipe automatic pressure testing machine, includes workstation (1), its characterized in that: a through hole for filling pressure liquid is formed in the workbench (1), a pressing assembly (2) for fastening one end of the hydrocarbon injection pipe (8) on the workbench (1) is installed at the through hole of the workbench (1), a first plugging assembly (3) for plugging an opening of a special-shaped flange (82) and a second plugging assembly (5) which is detachably installed on the workbench (1) and is used for plugging the other end of the hydrocarbon injection pipe (8) are also installed on the workbench (1); the pressing assembly (2) comprises a plurality of rotating cylinders (21) which are circumferentially fixed around a convex ring (81) of the hydrocarbon injection pipe (8), the rotating cylinders (21) are fixed on the workbench (1), and a pressing block (22) used for pressing the convex ring (81) is installed on an output shaft of each rotating cylinder (21).

2. The hydrocarbon injection pipe automatic pressure test machine according to claim 1, characterized in that: the first plugging assembly (3) comprises a first linear telescopic cylinder (31) and a flange plugging plug (32) used for plugging an opening of the special-shaped flange (82), an output shaft of the first linear telescopic cylinder (31) is arranged opposite to the opening for plugging the special-shaped flange (82), and the flange plugging plug (32) is installed on the output shaft of the first linear telescopic cylinder (31).

3. The hydrocarbon injection pipe automatic pressure test machine according to claim 2, characterized in that: still install butt subassembly (4) that are used for butt hydrocarbon injection pipe (8) on workstation (1), butt subassembly (4) and first shutoff subassembly (3) set up relatively and flush.

4. The hydrocarbon injection pipe automatic pressure test machine according to claim 2, characterized in that: second shutoff subassembly (5) including be used for joint chuck (51) of the one end of workstation (1) is kept away from in hydrocarbon injection pipe (8), fix on chuck (51) and be used for shutoff hydrocarbon injection pipe (8) to be close to the open-ended second linear expansion part (52) and the port of chuck (51) and seal up and block up (53), the output shaft of second linear expansion part (52) sets up with the opening of hydrocarbon injection pipe (8) relatively, the port seals up and blocks up (53) and fix on the output shaft of second linear expansion part (52).

5. The hydrocarbon injection pipe automatic pressure test machine according to claim 4, characterized in that: the clamping disc (51) comprises a fixed disc (511) parallel to a port of the hydrocarbon injection pipe (8), one side of the fixed disc (511) facing the hydrocarbon injection pipe (8) is provided with a fixed clamping piece (512) and a movable clamping piece (513), the fixed clamping piece (512) and the movable clamping piece (513) are both arc-shaped plate-shaped members, and the sum of the angles of the fixed clamping piece (511) and the movable clamping piece (513) is less than or equal to one hundred eighty degrees; the fixed clamping piece (512) is fixed on the fixed disc (511), the movable clamping piece (513) is installed on the fixed disc (511) in a sliding mode, clamping grooves (514) used for clamping the convex rings (81) are formed in the fixed clamping piece (512) and the movable clamping piece (513), and the sliding path of the movable clamping piece (513) passes through the position, opposite to the fixed clamping piece (512), of the fixed clamping piece.

6. The hydrocarbon injection pipe automatic pressure test machine according to claim 1, characterized in that: the through hole of workstation (1) department installs butt flange (7), butt flange (7) are a discoid component, offer annular (71) that are used for fixing a position bulge loop (81) in the middle part of one of them plane, still inherently be used for conveniently filling pressure liquid's filling stopper (72) in the middle part of the principal plane that butt flange (7) were provided with annular (71), filling stopper (72) are cylindric elastic component, have seted up filling hole (721) in its middle part.

7. The hydrocarbon injection pipe automatic pressure test machine according to claim 3, characterized in that: and a hanging rod (6) for hanging the second plugging component (5) is fixed on the workbench (1).

8. The hydrocarbon injection pipe automatic pressure test machine according to claim 7, characterized in that: the hanging rod (6) comprises a vertical rod (61) and a bent hanging rod (62), and the hanging rod (62) is bent towards the top direction of the device; a hanging piece (54) which is arranged on the hanging rod (62) in a penetrating way is fixed on the second plugging component (5).

9. The hydrocarbon injection pipe automatic pressure test machine according to claim 4, characterized in that: the flange seal plug (32) and the port seal plug (53) are both made of elastic materials.

10. The hydrocarbon injection pipe automatic pressure test machine according to claim 9, characterized in that: the port block (53) is a truncated cone-shaped member, and the small end of the port block faces to the side far away from the second linear expansion piece (52).