CN113588441A

CN113588441A - Stepless adaptation and rotation device for pipe length of hydrostatic testing machine

Info

Publication number: CN113588441A
Application number: CN202111138922.5A
Authority: CN
Inventors: 蔡小洪; 郑健; 周松涛
Original assignee: Nantong Sanrui Chemical Equipment Co ltd
Current assignee: Nantong Sanrui Chemical Equipment Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2021-11-02
Anticipated expiration: 2041-09-28
Also published as: CN113588441B

Abstract

The invention provides a stepless pipe length adaptive rotary moving device of a hydrostatic testing machine, and relates to the technical field of hydrostatic testing equipment. The stepless adaptation of hydrostatic testing machine pipe length is changeed and is moved device, including actuating mechanism, pipe fitting, removal sealing mechanism, direction support mechanism and fixed sealing mechanism, direction support mechanism is used for supporting the location to the pipe fitting, fixed sealing mechanism includes brace table, the sealed cell body of second, second seal assembly and T type connecting pipe, the top fixed connection of brace table is in the bottom of the sealed cell body of second, the inboard middle part fixed connection of the sealed cell body of second is in the one end of second seal assembly. The long shaft can be driven to rotate through the motor, the movable sealing mechanism can push the pipe fitting to move in the pipe length direction in an electrodeless mode, water leakage caused by yielding of the pipe fitting is avoided, and the problem that a hydraulic sealing ring is damaged due to yielding of a main hydraulic cylinder and pushing force is too large in the pressure test process is solved.

Description

Stepless adaptation and rotation device for pipe length of hydrostatic testing machine

Technical Field

The invention relates to the technical field of hydrostatic test equipment, in particular to a stepless pipe length adaptive rotary moving device of a hydrostatic test machine.

Background

The hydraulic test equipment is mainly used for factory detection of the following parts: automobile hoses: the device comprises a steering pipe, a brake pipe, an air conditioner pipe, a fuel pipe, a cooling water pipe, a heat dissipation hose, a warm air hose, an air filter element hose, a turbocharging system hose and an engineering hydraulic hose; aerial hoses and manifolds; other hard pipes or joints, automobile brake pumps, radiators, oil coolers and cylinder bodies; the engineering hydraulic hose is mainly used for hydraulic pipe blasting tests of hydraulic equipment, engineering machinery, mining machinery and the like; and pressure resistance and explosion tests of equipment needing pressure detection, such as the valve body, the cylinder barrel and the like.

Traditional sealing device large stroke removes and mainly leans on the large stroke hydraulic cylinder to satisfy, and is with high costs, and speed is slow, if main hydraulic cylinder thrust is too big can the curved pipe spare of top at the pressure testing in-process simultaneously, and the small main hydraulic cylinder of thrust lets back and can damage the sealing washer, receives the restriction of hydraulic cylinder stroke moreover, can not be too big by the long change of test tube.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a hydraulic testing machine pipe length stepless adaptive rotary moving device, which solves the problems that a main hydraulic cylinder has overlarge thrust to bend a pipe fitting and the main hydraulic cylinder retreats to damage a hydraulic sealing ring in the pressure testing process.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the stepless adaptation rotary moving device for the pipe length of the hydrostatic testing machine comprises a driving mechanism, a pipe fitting, a movable sealing mechanism, a guide supporting mechanism and a fixed sealing mechanism, wherein the bottom of the movable sealing mechanism is fixedly connected with the top of the driving mechanism, the movable sealing mechanism and the fixed sealing mechanism are used for sealing the pipe fitting and carrying out hydrostatic testing, the guide supporting mechanism is used for supporting and positioning the pipe fitting, the fixed sealing mechanism comprises a supporting table, a second sealing groove body, a second sealing assembly and a T-shaped connecting pipe, the top of the supporting table is fixedly connected with the bottom of the second sealing groove body, the middle part of the inner side of the second sealing groove body is fixedly connected with one end of the second sealing assembly, the second sealing assembly comprises a water inlet and outlet pipe, one end of the T-shaped connecting pipe penetrates through the second sealing groove body and is fixedly connected with one end of the water inlet and outlet pipe, and a sealing cushion ring is arranged on the outer side of the water inlet and outlet pipe, the terminal surface fixed connection of the adjacent sealing gasket ring in inlet and drain pipe's the outside is limited position piece, the outside of sealing gasket ring is provided with the spacing card strip of L type, the terminal portion fixed connection of the spacing card strip of L type is at the inboard middle part of the sealed cell body of second, the spacing card strip of L type and limit position piece all are circular evenly distributed around the sealing gasket ring, the tip of T type connecting pipe is and two tip of keeping away from inlet and drain pipe are provided with the valve.

Preferably, the driving mechanism comprises a motor and a first linear slide rail, the output end of the motor is fixedly connected with a long shaft, a third bevel gear is fixedly connected with the motor adjacent to the outer side of the long shaft, a second bevel gear is fixedly connected with one end of the long shaft far away from the motor, one side of each of the second bevel gear and the third bevel gear is engaged with a first bevel gear, the middle parts of the two first bevel gears are fixedly connected with ball screws, the outer sides of the two ball screws are provided with moving blocks, the two sides of the moving blocks are respectively provided with a first linear slide rail, the upper surfaces of the two moving blocks are connected through a connecting plate, the top of the connecting plate is fixedly connected to the bottom of the movable sealing mechanism, a bearing plate is rotatably connected between the third bevel gear and the second bevel gear on the outer side of the long shaft, and the two ends of the ball screw are rotatably connected with the bearing plate.

Preferably, fixed sealing mechanism still includes the gripper, the gripper includes the mounting bracket, the one end rear side fixed connection of mounting bracket is in the one end of the sealed cell body of second, the one end front side fixedly connected with pneumatic cylinder of mounting bracket, the two-sided rack of output fixedly connected with of pneumatic cylinder to the equal meshing in both sides of two-sided rack is connected with the gear, the middle part of gear is rotated and is connected at the other end of mounting bracket, two one side of keeping away from mutually of gear is rotated and is connected with the arm lock, two the opposite side fixedly connected with of arm lock presss from both sides the pad, two the opposite side of arm lock is rotated and is connected with the spliced pole, two the opposite side fixed connection of spliced pole is at the other end of mounting bracket.

Preferably, the movable sealing mechanism comprises a first sealing groove body and a first sealing assembly, the bottom of the first sealing groove body is fixedly connected to the top of the connecting plate, the first sealing assembly and the second sealing assembly are structurally identical, the first sealing assembly and the second sealing assembly are distributed in a mirror image mode, and the axis of the first sealing assembly and the axis of the second sealing assembly are on the same straight line.

Preferably, the guide supporting mechanism comprises a second linear slide rail, a bearing plate is arranged at the top of the second linear slide rail, the top of the bearing plate is connected with a support box through a third linear guide rail, a support pipe clamp is fixedly connected to the inner bottom of the support box, a transverse plate is fixedly connected to the top of the support box, adjusting knobs are respectively in threaded connection with two ends of the middle of the transverse plate, and the bottom ends of the two adjusting knobs are respectively rotatably connected with the pressure pipe clamp.

Preferably, both ends of the support box are provided with through holes, and the axis of each through hole, the axis of the first sealing assembly and the axis of the second sealing assembly are on the same straight line.

The working principle is as follows: the long shaft can be driven to rotate by the motor, a third bevel gear is fixedly connected to the adjacent motor on the outer side of the long shaft, a second bevel gear is fixedly connected to one end of the long shaft, which is far away from the motor, one side of each of the second bevel gear and the third bevel gear is engaged and connected with the first bevel gear, so that the two first bevel gears can rotate, ball screws are fixedly connected to the middle parts of the two first bevel gears, further the two ball screws can rotate, moving blocks are arranged on the outer sides of the two ball screws, first linear slide rails are arranged on the two sides of each moving block, further the two moving blocks can respectively do horizontal linear motion on the first linear slide rails, the upper surfaces of the two moving blocks are connected through a connecting plate, the top of the connecting plate is fixedly connected to the bottom of the movable sealing mechanism, the movable sealing mechanism can do horizontal linear motion, and the pipe fitting can be pushed by the movable sealing mechanism to move in the pipe length direction, the movable sealing mechanism and the fixed sealing mechanism can clamp the pipe fitting, closed-loop control of position, speed and torque is realized, overload resistance is strong, operation is stable, water leakage caused by yielding of the pipe fitting is avoided, the sealing gasket ring is prevented from falling off through the L-shaped limiting clamping strip and the limiting point block, when the movable sealing mechanism and the fixed sealing mechanism are used, the end face of the pipe fitting is positioned between the L-shaped limiting clamping strip and the limiting point block, the pipe fitting can be sealed through the sealing gasket ring, water leakage is prevented, a buffer effect can be achieved when the pipe fitting moves, valves are arranged at the end parts of the T-shaped connecting pipe and the two end parts far away from the water inlet and outlet pipes, after the movable sealing mechanism and the fixed sealing mechanism clamp the pipe fitting, the valves are opened, water is injected into the pipe fitting through the T-shaped connecting pipe and the water inlet and outlet pipes, internal pressure of the pipe fitting is increased, a hydraulic test can be carried out, the double-sided rack can be driven to linearly move through the hydraulic cylinder, and then the two gears can rotate in opposite directions, and then can make two arm lock can clip or loosen the pipe fitting, avoid pipe fitting longitudinal movement, improve the stability of pipe fitting, when the axis through first seal assembly and the tight pipe fitting of second seal assembly clamp, the atress is balanced, avoid leaking, satisfy the hydrostatic test requirement, make through second linear slide rail and hold in the palm the box and can the horizontal straight line transport pipe fitting, the third linear guide is convenient for adjust the position of holding in the palm the box, can make the pressure clamp remove in vertical direction through twisting two adjust knob, the pressure clamp of being convenient for is pressed from both sides with trusteeship and is cliied the pipe fitting, improve the stability of pipe fitting.

(III) advantageous effects

The invention provides a stepless pipe length adapting rotary moving device of a hydrostatic testing machine. The method has the following beneficial effects:

1. the long shaft can be driven to rotate by the motor, the two first bevel gears can rotate, the two ball screws can rotate, the two moving blocks can be further enabled to do horizontal linear motion on the first linear sliding rails respectively, the movable sealing mechanism can do horizontal linear motion, the pipe fittings can be pushed by the movable sealing mechanism to move in a pipe length direction in an electrodeless mode, the movable sealing mechanism and the fixed sealing mechanism can clamp the pipe fittings, closed-loop control of position, speed and moment is achieved, the overload resistance is high, the operation is stable, water leakage caused by yielding of the pipe fittings is avoided, and the problem that a hydraulic sealing ring is damaged due to the fact that the pushing force is too large, the bent pipe fittings are pushed by the main hydraulic cylinder, and the yielding of the main hydraulic cylinder is avoided in the pressure testing process is solved.

2. The sealing gasket ring is prevented from falling off through the L-shaped limiting clamping strip and the limiting point block, when the sealing gasket ring is used, the end face of the pipe fitting is located between the L-shaped limiting clamping strip and the limiting point block, the pipe fitting can be sealed through the sealing gasket ring, water leakage is prevented, a buffering effect can be achieved when the pipe fitting moves, and the pipe fitting is prevented from being stressed and bent.

3. According to the invention, the hydraulic cylinder can drive the double-sided rack to linearly move, so that the two gears can rotate in opposite directions, and further the two clamping arms can clamp or loosen the pipe fitting, thereby avoiding the pipe fitting from longitudinally moving and improving the stability of the pipe fitting.

4. According to the pipe fitting transportation device, the support box can horizontally and linearly transport pipe fittings through the second linear sliding rail, the third linear guide rail is convenient for adjusting the position of the support box, the pressure pipe clamp can move in the vertical direction by screwing the two adjusting knobs, the pressure pipe clamp and the support pipe clamp can clamp the pipe fittings conveniently, and the stability of the pipe fittings is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the drive mechanism of the present invention;

FIG. 3 is a schematic view of the stationary seal mechanism of the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic view of a gripper according to the present invention;

FIG. 6 is a schematic view of a second seal assembly of the present invention;

FIG. 7 is a schematic view of a guide support mechanism of the present invention;

FIG. 8 is an exploded view of the guide support mechanism of the present invention;

fig. 9 is a schematic view of the moving seal mechanism of the present invention.

Wherein, 1, a driving mechanism; 2. moving the sealing mechanism; 3. a guide support mechanism; 4. a pipe fitting; 5. fixing the sealing mechanism; 101. a first bevel gear; 102. a second bevel gear; 103. a first linear slide rail; 104. a long axis; 105. a third bevel gear; 106. a motor; 107. a ball screw; 108. a bearing plate; 109. a moving block; 110. a connecting plate; 201. a first sealing groove body; 202. a first seal assembly; 301. a second linear slide rail; 302. a carrier plate; 303. a third linear guide rail; 304. supporting the box; 305. adjusting a knob; 306. a transverse plate; 307. a pipe clamp; 308. a pipe bracket clamp; 501. a support table; 502. a second sealed tank body; 503. a second seal assembly; 504. a gripper; 505. a T-shaped connecting pipe; 506. a valve; 5031. a sealing gasket ring; 5032. a restriction site block; 5033. a water inlet pipe and a water outlet pipe; 5034. an L-shaped limiting clamping strip; 5041. a clamping pad; 5042. connecting columns; 5043. a hydraulic cylinder; 5044. a mounting frame; 5045. a gear; 5046. and (4) clamping arms.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-4, the stepless tube length adapting rotary moving device of the hydrostatic testing machine comprises a driving mechanism 1, a tube 4, a movable sealing mechanism 2, a guiding supporting mechanism 3 and a fixed sealing mechanism 5, wherein the bottom of the movable sealing mechanism 2 is fixedly connected with the top of the driving mechanism 1, the bottoms of the driving mechanism 1, the guiding supporting mechanism 3 and the fixed sealing mechanism 5 are all on the same platform surface or the ground, the driving mechanism 1 is used for enabling the movable sealing mechanism 2 to move horizontally, so that the movable sealing mechanism 2 can push the tube 4 to move linearly along the length direction, the movable sealing mechanism 2 can be prevented from being pressed and yielding, the steel tube can be prevented from being bent due to overlarge thrust, the movable sealing mechanism 2 and the fixed sealing mechanism 5 are used for sealing the tube 4 and carrying out hydrostatic testing, and under the action of the movable sealing mechanism 2 and the fixed sealing mechanism 5, the two ends of the tube 4 can be sealed, the direction is supported mechanism 3 and is used for supporting the location to pipe fitting 4, direction is supported mechanism 3 and can be made pipe fitting 4 removal process more steady, make pipe fitting 4 can keep the fixed sealing mechanism 5 of sharp alignment, fixed sealing mechanism 5 includes supporting bench 501, the sealed cell body 502 of second, second seal assembly 503 and T type connecting pipe 505, supporting bench 501's top fixed connection is in the bottom of the sealed cell body 502 of second, the inboard middle part fixed connection of the sealed cell body 502 of second is in the one end of second seal assembly 503, second seal assembly 503 can effectively seal and play the cushioning effect, the one end of T type connecting pipe 505 runs through the sealed cell body 502 of second and fixed connection is in the one end of second seal assembly 503, be convenient for connecting water pipe through T type connecting pipe 505 and carry out the water injection pressure testing.

As shown in fig. 2, the driving mechanism 1 includes a motor 106 and a first linear guideway 103, an output end of the motor 106 is fixedly connected with a long shaft 104, the long shaft 104 can be driven to rotate by the motor 106, an outer side of the long shaft 104 is fixedly connected with a third bevel gear 105 adjacent to the motor 106, one end of the long shaft 104 far away from the motor 106 is fixedly connected with a second bevel gear 102, one side of the second bevel gear 102 and one side of the third bevel gear 105 are respectively engaged with a first bevel gear 101, so that the two first bevel gears 101 can rotate, a ball screw 107 is fixedly connected to a middle portion of each of the two first bevel gears 101, so that the two ball screws 107 can rotate, moving blocks 109 are respectively arranged on outer sides of the two ball screws 107, the first linear guideway 103 are respectively arranged on two sides of the moving blocks 109, further the two moving blocks 109 can respectively make horizontal linear motions on the first linear guideway 103, upper surfaces of the two moving blocks 109 are connected by a connecting plate 110, the top of the connecting plate 110 is fixedly connected to the bottom of the movable sealing mechanism 2, so that the movable sealing mechanism 2 can perform horizontal linear motion, the pipe fitting 4 is pushed by the movable sealing mechanism 2 to perform stepless movement in the pipe length direction, the pipe fitting 4 can be clamped by the movable sealing mechanism 2 and the fixed sealing mechanism 5, closed-loop control of position, speed and torque is achieved, the overload resistance is high, the operation is stable, water leakage caused by concession of the pipe fitting 4 is avoided, a bearing plate 108 is rotatably connected between the third bevel gear 105 and the second bevel gear 102 on the outer side of the long shaft 104, two ends of the ball screw 107 are rotatably connected with the bearing plate 108, and the long shaft 104 and the two ball screws 107 can be supported through the bearing plate 108.

As shown in fig. 6, the second sealing assembly 503 includes a water inlet and outlet pipe 5033, one end of the water inlet and outlet pipe 5033 is fixedly connected to one end of the T-shaped connecting pipe 505, a sealing gasket 5031 is disposed on the outer side of the water inlet and outlet pipe 5033, a limit block 5032 is fixedly connected to the end surface of the adjacent sealing gasket 5031 on the outer side of the water inlet and outlet pipe 5033, an L-shaped limit strip 5034 is disposed on the outer side of the sealing gasket 5031, the end of the L-shaped limit strip 5034 is fixedly connected to the middle of the inner side of the second sealing groove 502, the L-shaped limit strip 5034 and the limit block 5032 are both circularly and uniformly distributed around the sealing gasket 5031, the L-shaped limit strip 5034 and the limit block 5032 prevent the sealing gasket 5031 from dropping off, when in use, the end surface of the pipe 4 is located between the L-shaped limit strip 5034 and the limit block 5032, the pipe 4 can be sealed by the sealing gasket 5031 to prevent water leakage, and can play a role of buffering role when the pipe 4 moves, valves 506 are provided at both ends of the T-shaped connection pipe 505 which are away from the water inlet/outlet pipe 5033, and after the pipe 4 is held by the movable sealing mechanism 2 and the fixed sealing mechanism 5, the valve 506 is opened to inject water into the pipe 4 through the T-shaped connection pipe 505 and the water inlet/outlet pipe 5033, thereby increasing the internal pressure of the pipe 4 and performing a hydraulic test.

As shown in fig. 5, the fixed sealing mechanism 5 further includes a gripper 504, the gripper 504 includes a mounting block 5044, a rear side of one end of the mounting block 5044 is fixedly connected to one end of the second sealing groove 502, a front side of one end of the mounting block 5044 is fixedly connected to a hydraulic cylinder 5043, an output end of the hydraulic cylinder 5043 is fixedly connected to a double-sided rack, and both sides of the double-sided rack are engaged with a gear 5045, a middle portion of the gear 5045 is rotatably connected to the other end of the mounting block 5044, a side of the two gears 5045 away from each other is rotatably connected to a clamping arm 5046, opposite sides of the two clamping arms 5046 are fixedly connected to clamping pads 5041, opposite sides of the two clamping arms 5046 are rotatably connected to a connecting column 5042, opposite sides of the two connecting columns 5042 are fixedly connected to the other end of the mounting block 5044, the hydraulic cylinder 5043 can drive the double-sided rack to move linearly, so that the two gears 5045 can rotate in opposite directions, so that the two clamping arms 5046 can clamp or release the pipe 4, avoid pipe fitting 4 longitudinal movement, improve pipe fitting 4's stability.

As shown in fig. 9, the movable sealing mechanism 2 includes a first sealing groove 201 and a first sealing assembly 202, the bottom of the first sealing groove 201 is fixedly connected to the top of the connecting plate 110, the first sealing assembly 202 and the second sealing assembly 503 have the same structure, and the first sealing assembly 202 and the second sealing assembly 503 are distributed in a mirror image manner, the axis of the first sealing assembly 202 and the axis of the second sealing assembly 503 are on the same straight line, and when the pipe 4 is clamped by the axis of the first sealing assembly 202 and the second sealing assembly 503, the stress is balanced, water leakage is avoided, and the requirement of a hydraulic test is met.

As shown in fig. 7 and 8, the guiding and supporting mechanism 3 includes a second linear slide rail 301, a loading plate 302 is disposed on the top of the second linear slide rail 301, the top of the loading plate 302 is connected with a tray box 304 through a third linear guide rail 303, a tray clamp 308 is fixedly connected to the inner bottom of the tray box 304, a horizontal plate 306 is fixedly connected to the top of the tray box 304, two ends of the middle of the horizontal plate 306 are respectively connected with an adjusting knob 305 through threads, the bottom ends of the two adjusting knobs 305 are respectively rotatably connected with a pressure clamp 307, the tray box 304 can horizontally and linearly transport the pipe 4 through the second linear slide rail 301, the third linear guide rail 303 facilitates adjusting the position of the tray box 304, the pressure clamp 307 can move in the vertical direction by screwing the two adjusting knobs 305, the pressure clamp 307 and the tray clamp 308 can clamp the pipe 4, and the stability of the pipe 4 is improved.

Both ends of the tray 304 are provided with through holes, the axes of the through holes and the axes of the first sealing assembly 202 and the second sealing assembly 503 are on the same line, and the pipe fitting 4 is inserted into the through hole of the tray 304, so that the pipe fitting 4 can be aligned with the first sealing assembly 202 and the second sealing assembly 503.

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

Claims

1. The stepless adaptation of hydrostatic testing machine pipe length moves device soon, including actuating mechanism (1), pipe fitting (4), removal sealing mechanism (2), direction support mechanism (3) and fixed sealing mechanism (5), its characterized in that: the bottom of the movable sealing mechanism (2) is fixedly connected with the top of the driving mechanism (1), the movable sealing mechanism (2) and the fixed sealing mechanism (5) are used for sealing the pipe fitting (4) and performing a hydraulic test, the guide supporting mechanism (3) is used for supporting and positioning the pipe fitting (4), the fixed sealing mechanism (5) comprises a supporting table (501), a second sealing groove body (502), a second sealing assembly (503) and a T-shaped connecting pipe (505), the top of the supporting table (501) is fixedly connected to the bottom of the second sealing groove body (502), the middle of the inner side of the second sealing groove body (502) is fixedly connected to one end of the second sealing assembly (503), the second sealing assembly (503) comprises a water inlet and outlet pipe (5033), one end of the T-shaped connecting pipe (505) penetrates through the second sealing groove body (502) and is fixedly connected to one end of the water inlet and outlet pipe (5033), a sealing gasket ring (5031) is arranged on the outer side of the water inlet and outlet pipe (5033), a limited point block (5032) is fixedly connected to the end face of the sealing gasket ring (5031) adjacent to the outer side of the water inlet and outlet pipe (5033), an L-shaped limiting clamping strip (5034) is arranged on the outer side of the sealing gasket ring (5031), the end part of the L-shaped limiting clamping strip (5034) is fixedly connected to the middle part of the inner side of the second sealing groove body (502), the L-shaped limiting clamping strip (5034) and the limiting point block (5032) are circularly and uniformly distributed around the sealing gasket ring (5031), and valves (506) are arranged at the end part of the T-shaped connecting pipe (505) and at the two end parts far away from the water inlet and outlet pipe (5033).

2. The stepless tube length adapting rotary moving device of the hydrostatic testing machine as claimed in claim 1, which is characterized in that: the driving mechanism (1) comprises a motor (106) and a first linear sliding rail (103), the output end of the motor (106) is fixedly connected with a long shaft (104), the outer side of the long shaft (104) is fixedly connected with a third bevel gear (105) adjacent to the motor (106), one end of the long shaft (104) far away from the motor (106) is fixedly connected with a second bevel gear (102), one sides of the second bevel gear (102) and the third bevel gear (105) are respectively connected with a first bevel gear (101) in a meshed manner, the middle parts of the two first bevel gears (101) are respectively and fixedly connected with a ball screw (107), the outer sides of the two ball screws (107) are respectively provided with a moving block (109), the two sides of the moving block (109) are respectively provided with the first linear sliding rail (103), the upper surfaces of the two moving blocks (109) are connected through a connecting plate (110), the top of the connecting plate (110) is fixedly connected to the bottom of the movable sealing mechanism (2), and a bearing plate (108) is rotatably connected between the third bevel gear (105) and the second bevel gear (102) on the outer side of the long shaft (104), and the bearing plate (108) is rotatably connected to both ends of the ball screw (107).

3. The stepless tube length adapting rotary moving device of the hydrostatic testing machine as claimed in claim 1, which is characterized in that: the stationary sealing mechanism (5) further comprises a gripper (504), the gripper (504) comprising a mounting bracket (5044), the rear side of one end of the mounting rack (5044) is fixedly connected with one end of the second sealing groove body (502), a hydraulic cylinder (5043) is fixedly connected to the front side of one end of the mounting rack (5044), a double-sided rack is fixedly connected to the output end of the hydraulic cylinder (5043), and the both sides of two-sided rack all the meshing be connected with gear (5045), the middle part of gear (5045) is rotated and is connected at the other end of mounting bracket (5044), two one side of keeping away from mutually of gear (5045) is rotated and is connected with arm lock (5046), two opposite side fixedly connected with of arm lock (5046) presss from both sides pad (5041), two the opposite side of arm lock (5046) is rotated and is connected with spliced pole (5042), two opposite side fixed connection of spliced pole (5042) is at the other end of mounting bracket (5044).

4. The stepless adaptive rotary-moving device for the tube length of the hydrostatic testing machine according to claim 2, is characterized in that: the movable sealing mechanism (2) comprises a first sealing groove body (201) and a first sealing assembly (202), the bottom of the first sealing groove body (201) is fixedly connected to the top of the connecting plate (110), the first sealing assembly (202) and the second sealing assembly (503) are identical in structure composition, the first sealing assembly (202) and the second sealing assembly (503) are distributed in a mirror image mode, and the axis of the first sealing assembly (202) and the axis of the second sealing assembly (503) are on the same straight line.

5. The stepless tube length adapting rotary moving device of the hydrostatic testing machine as claimed in claim 1, which is characterized in that: the guide supporting mechanism (3) comprises a second linear slide rail (301), a bearing plate (302) is arranged at the top of the second linear slide rail (301), the top of the bearing plate (302) is connected with a support box (304) through a third linear guide rail (303), the inner bottom of the support box (304) is fixedly connected with a support pipe clamp (308), the top of the support box (304) is fixedly connected with a transverse plate (306), two ends of the middle of the transverse plate (306) are connected with adjusting knobs (305) in a threaded manner, and the bottom ends of the adjusting knobs (305) are connected with a pressure pipe clamp (307) in a rotating manner.

6. The stepless adaptive rotary moving device for the tube length of the hydrostatic testing machine, according to claim 5, is characterized in that: through holes are formed in two ends of the tray (304), and the axis of each through hole, the axis of the first sealing assembly (202) and the axis of the second sealing assembly (503) are on the same straight line.