CN212008092U - Locking device - Google Patents

Abstract

The utility model relates to a locking device, include: the device comprises an upper fixing block, an upper extrusion block, a locking cylinder, an upper ejector block, a lower extrusion block and a lower fixing block. Through using the locking cylinder will go up the extrusion piece and extrude the piece to the bearing post direction pulling down, go up extrusion piece and extrusion piece down through the sloping to with one side extrusion top piece and ejector pad down, go up the upper and lower both sides that the ejector pad extrudeed movable cross beam respectively with ejector pad down simultaneously, make movable cross beam and round pin axle compress tightly the laminating and keep fixed, the round pin axle compresses tightly with the pinhole laminating of bearing post and keeps fixed to in the zero passage test later, can not produce the vibration because of having the clearance between movable cross beam, round pin axle and the bearing post, damage the testing machine, the utility model discloses a locking device simple structure has solved and has pulled-to draw fatigue test and pressure-to press the problem that the fatigue testing machine can not carry out the zero passage test.

Description

Locking device

Technical Field

The utility model relates to a locking device.

Background

With the development of ocean oil and gas resources in China increasing, oil and gas pipelines play an important role in the process of oil and gas exploitation and operation. The fatigue damage is one of the main reasons for the failure of the oil and gas pipeline, and the alternating stress applied to the oil and gas pipeline can expand the defects inside and outside the pipeline, so that the pipeline is finally subjected to fatigue fracture.

At present, in important marine engineering of some developed countries, fatigue life evaluation and safety check are carried out on the oil and gas pipelines by adopting full-size oil and gas pipeline fatigue test data. Therefore, on the basis of fully considering the service condition of the oil and gas pipeline and domestic and foreign development, a pipeline full-size axial fatigue testing machine is developed domestically, but some testing machines (only capable of performing tension-tension fatigue test and compression-compression fatigue) cannot perform zero-crossing test because a gap exists between the movable cross beam and the pin shaft, and in order to solve the problem, a locking device is needed to lock the movable cross beam and the pin shaft.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, providing a locking device, solved and drawn-draw fatigue test and press-press fatigue test machine and can not carry out zero passage test's problem.

A locking device, comprising: the device comprises an upper fixed block, an upper extrusion block, a locking cylinder, an upper ejector block, a lower extrusion block and a lower fixed block, wherein the upper fixed block, the upper extrusion block and the upper ejector block are sequentially arranged above a bearing column of the testing machine from left to right, the lower fixed block, the lower extrusion block and the lower ejector block are sequentially arranged below the bearing column of the testing machine from left to right, the upper fixed block and the lower fixed block are fixedly connected with the bearing column, the upper ejector block and the lower ejector block are fixedly connected and can move left and right along the bearing column,

inclined planes are formed on the left side and the right side of the upper extrusion block, the inclined plane on the left side of the upper extrusion block is in contact with and matched with the inclined plane of the upper fixing block, the inclined plane on the right side of the upper extrusion block is in contact with and matched with the inclined plane of the upper ejection block, and a gap exists between the lower bottom surface of the upper extrusion block and the bearing column; inclined planes are formed on the left side and the right side of the lower extrusion block, the inclined plane on the left side of the lower extrusion block is in contact with and matched with the inclined plane of the lower fixing block, the inclined plane on the right side of the lower extrusion block is in contact with and matched with the inclined plane of the lower ejection block, and a gap exists between the upper top surface of the lower extrusion block and the bearing column;

the cylinder body of the locking cylinder is fixedly connected with the upper extrusion block, a piston rod of the locking cylinder sequentially penetrates through the upper extrusion block, the bearing column and the lower extrusion block and then is in threaded connection with a third nut, the locking cylinder drives the upper extrusion block and the lower extrusion block to move towards the direction close to the bearing column, the upper extrusion block extrudes the upper ejection block and drives the upper ejection block to move rightwards, and the lower extrusion block extrudes the lower ejection block and drives the lower ejection block to move rightwards.

Preferably, the inclined planes on the left side and the right side of the upper extrusion block and the included angle between the lower bottom surface of the upper extrusion block are obtuse angles, and the inclined planes on the left side and the right side of the lower extrusion block and the included angle between the upper top surface of the lower extrusion block are obtuse angles.

Preferably, the first disassembling cylinder piston, the first disassembling cylinder cover plate and the first screw are further included, first stepped blind holes are formed in the left side and the right side of the upper extrusion block respectively, the first disassembling cylinder cover plate is arranged at the step of the first stepped blind hole, the first screw penetrates through the steps of the first disassembling cylinder cover plate and the first stepped blind holes and then is in threaded connection with the upper extrusion block, the first disassembling cylinder piston comprises a first piston part and a first piston rod part, the diameter of the first piston part is larger than that of the first piston rod part, the first piston part is in sliding connection with the first stepped blind holes, the first piston rod part penetrates through the first disassembling cylinder cover plate and is in sliding connection with the first disassembling cylinder cover plate, and the end part of the first piston is in contact with the bearing column;

still dismantle jar piston, second including the second and dismantle jar apron and second screw, the extrusion piece left and right sides is formed with second step blind hole respectively down, the second is dismantled the step department that jar apron set up at second step blind hole, the second screw passes behind the step of second dismantlement jar apron and second step blind hole with down extrusion piece threaded connection, the second is dismantled jar piston and is included second piston portion and second piston rod portion, the diameter of second piston portion is greater than the diameter of second piston rod portion, second piston portion and second step blind hole sliding connection, second piston rod portion passes the second and dismantles jar apron and dismantle jar apron sliding connection with the second, second piston rod portion tip and bearing post contact.

Preferably, the right sides of the upper ejector block and the lower ejector block are provided with movable cross beams, the upper ejector block and the lower ejector block are both in contact with the movable cross beams, and the pin shaft penetrates through the movable cross beams and the bearing columns.

Preferably, the upper fixing block is formed with a first protruding part which is inserted into the through hole at the left upper side of the bearing column and is matched with the through hole at the left upper side of the bearing column,

the lower fixing block is provided with a second protruding part, the first protruding part is inserted into the through hole at the left lower side of the bearing column and is matched with the through hole at the left lower side of the bearing column,

the first screw rod penetrates through the upper fixing block, the bearing column and the lower fixing block, and the upper side and the lower side of the first screw rod are in threaded connection with the first nut to limit axial movement of the upper fixing block and the lower fixing block.

Preferably, the second screw rod penetrates through the upper fixing block, the bearing column and the lower fixing block, the upper side and the lower side of the second screw rod are in threaded connection with the second nut, the upper fixing block and the lower fixing block are respectively in contact with the bearing column, and the second nut penetrates through the two through holes in the right side of the bearing column and has a gap with the two through holes in the right side.

Preferably, the piston rod of the locking cylinder passes through two through holes in the middle of the bearing column and has a gap with the two through holes in the middle.

The utility model has the advantages of as follows: through using the locking cylinder will go up the extrusion piece and extrude the piece to the bearing post direction pulling down, go up extrusion piece and extrusion piece down through the sloping to with one side extrusion top piece and ejector pad down, go up the upper and lower both sides that the ejector pad extrudeed movable cross beam respectively with ejector pad down simultaneously, make movable cross beam and round pin axle compress tightly the laminating and keep fixed, the round pin axle compresses tightly with the pinhole laminating of bearing post and keeps fixed to in the zero passage test later, can not produce the vibration because of having the clearance between movable cross beam, round pin axle and the bearing post, damage the testing machine, the utility model discloses a locking device simple structure has solved and has pulled-to draw fatigue test and pressure-to press the problem that the fatigue testing machine can not carry out the zero passage test.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawing in the following description is only an embodiment of the invention, and that for a person skilled in the art, other embodiments can be derived from the drawing provided without inventive effort.

FIG. 1: the structure schematic diagram of the testing machine;

FIG. 2: the utility model discloses a schematic overlooking structure;

FIG. 3: the utility model is a schematic sectional structure along A;

FIG. 4: the schematic view of the sectional structure of the utility model;

FIG. 5: the utility model discloses local enlarged schematic diagram in I department.

Detailed Description

The invention will be further described with reference to the following figures and examples:

reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The words in the same direction in the upper, lower, left, right, front, back and forth directions of the utility model are based on the direction in fig. 3.

The first embodiment is as follows:

as shown in fig. 1 to 5, the present embodiment provides a locking device including: the device comprises an upper fixed block 2, an upper extrusion block 3, a locking cylinder 4, an upper ejection block 6, a lower ejection block 9, a lower extrusion block 10 and a lower fixed block 12, wherein the upper fixed block 2, the upper extrusion block 3 and the upper ejection block 6 are sequentially arranged above a bearing column 1 of a testing machine from left to right, the lower fixed block 12, the lower extrusion block 10 and the lower ejection block 9 are sequentially arranged below the bearing column 1 of the testing machine from left to right, the upper fixed block 2 and the lower fixed block 12 are fixedly connected with the bearing column 1, the upper ejection block 6 and the lower ejection block 9 are fixedly connected and can move left and right along the bearing column 1,

inclined planes are formed on the left side and the right side of the upper extrusion block 3, the inclined plane on the left side of the upper extrusion block 3 is in contact with and matched with the inclined plane of the upper fixed block 2, the inclined plane on the right side of the upper extrusion block 3 is in contact with and matched with the inclined plane of the upper ejection block 6, and a gap is formed between the lower bottom surface of the upper extrusion block 3 and the bearing column 1; inclined planes are formed on the left side and the right side of the lower extrusion block 10, the inclined plane on the left side of the lower extrusion block 10 is in contact with and matched with the inclined plane of the lower fixing block 12, the inclined plane on the right side of the lower extrusion block 10 is in contact with and matched with the inclined plane of the lower ejection block 9, and a gap exists between the upper top surface of the lower extrusion block 10 and the bearing column 1;

the cylinder body of the locking cylinder 4 is fixedly connected with the upper extrusion block 3, a piston rod 41 of the locking cylinder 4 sequentially penetrates through the upper extrusion block 3, the bearing column 1 and the lower extrusion block 10 and then is in threaded connection with a third nut 42, the locking cylinder 4 drives the upper extrusion block 3 and the lower extrusion block 10 to move towards the direction close to the bearing column 1, the upper extrusion block 3 extrudes the upper ejection block 6 to drive the upper ejection block 6 to move rightwards, and the lower extrusion block 10 extrudes the lower ejection block 9 to drive the lower ejection block 9 to move rightwards.

Preferably, the included angles between the inclined planes on the left side and the right side of the upper extrusion block 3 and the lower bottom surface of the upper extrusion block 3 are obtuse angles, and the included angles between the inclined planes on the left side and the right side of the lower extrusion block 10 and the upper top surface of the lower extrusion block 10 are obtuse angles.

Preferably, the bearing column further comprises a first disassembling cylinder piston 5, a first disassembling cylinder cover plate 51 and first screws 52, first stepped blind holes 31 are formed in the left side and the right side of the upper extrusion block 3 respectively, the first disassembling cylinder cover plate 51 is arranged at the step of the first stepped blind hole 31, the first screws 52 penetrate through the steps of the first disassembling cylinder cover plate 51 and the first stepped blind hole 31 and then are in threaded connection with the upper extrusion block 3, the first disassembling cylinder piston 5 comprises a first piston part and a first piston rod part, the diameter of the first piston part is larger than that of the first piston rod part, the first piston part is in sliding connection with the first stepped blind holes 31, the first piston rod part penetrates through the first disassembling cylinder cover plate 51 and is in sliding connection with the first disassembling cylinder cover plate 51, and the end part of the first piston rod part is in contact with the bearing column 1;

still dismantle jar piston 101, second including the second and dismantle jar apron and second screw, the extrusion piece 10 left and right sides is formed with second step blind hole 102 respectively down, the second is dismantled the jar apron and is set up in the step department of second step blind hole 102, the second screw pass after the step of second dismantlement jar apron and second step blind hole with down extrusion piece threaded connection, jar piston 101 is dismantled including second piston portion and second piston rod portion to the second, the diameter of second piston portion is greater than the diameter of second piston rod portion, second piston portion and second step blind hole 102 sliding connection, second piston rod portion passes the second and dismantles jar apron and with the second and dismantle jar apron sliding connection, second piston rod portion tip and bearing post 1 contact. The second cylinder piston 101, the second cylinder cover plate and the second screw are the same as the first cylinder piston 5, the first cylinder cover plate 51 and the first screw 52 in structure and principle, and the installation positions of the two groups of parts are mirror symmetry in fig. 3.

Preferably, the right sides of the upper top block 6 and the lower top block 9 are provided with a movable cross beam 7, the upper top block 6 and the lower top block 9 are both in contact with the movable cross beam 7, and a pin shaft 8 penetrates through the movable cross beam 7 and the bearing column 1.

Preferably, the upper fixing block 2 is formed with a first protrusion, which is inserted into the through hole at the upper left side of the bearing column 1 and is matched with the through hole at the upper left side of the bearing column 1,

the lower fixing block 12 is formed with a second protrusion, the first protrusion is inserted into the through hole at the left lower side of the bearing column 1 and is matched with the through hole at the left lower side of the bearing column 1,

the first screw 21 penetrates through the upper fixing block 2, the bearing column 1 and the lower fixing block 12, and the upper side and the lower side of the first screw 21 are in threaded connection with the first nut 22 to limit axial movement of the upper fixing block 2 and the lower fixing block 12.

Preferably, the second screw 61 penetrates through the upper fixed block 2, the bearing column 1 and the lower fixed block 12, the upper side and the lower side of the second screw 61 are both in threaded connection with the second nut 62 to respectively contact the upper fixed block 2 and the lower fixed block 12 with the bearing column 1, and the second nut 62 penetrates through two through holes on the right side of the bearing column 1 and has a gap with the two through holes on the right side.

Preferably, the piston rod of the locking cylinder 4 passes through two through holes in the middle of the bearing column 1 and has a gap with the two through holes in the middle.

The working principle is as follows: the testing machine comprises two support columns 1, and a test sample 16 is arranged between the support columns 1 on two sides. A servo actuator 13 and a hydraulic pipeline 14 for providing power for the servo actuator 13 are arranged between one ends of the two bearing columns 1, and a movable cross beam 7 is arranged between the other ends of the two bearing columns through a pin shaft 8. Namely, two sides of the movable beam 7 are respectively connected with the two bearing columns 1 through pin shafts 8, and two sides of the movable beam are connected with the locking device. The movable beam 7 and the servo actuator 13 are respectively provided with a clamp 12 for clamping a sample 16, and the servo actuator 13 is provided with a force sensor 15.

When the locking device is installed, firstly, the movable beam 7 is moved to a test position; an upper ejector block 6 and a lower ejector block 9 are installed by using a hoisting device, a second screw 61 passes through the middle of the upper ejector block 6 and the lower ejector block 9, and second nuts 62 (back nuts) at two ends are in threaded connection with the second screw 61, so that the upper ejector block 6 and the lower ejector block 9 clamp the bearing column 1; installing an upper fixed block 2 and a lower fixed block 12, inserting the protruding parts (pin shafts) of the fixed block 2 and the lower fixed block 12 into pin holes on the left side of the bearing column 1, and then passing through a first screw 21 from the middle, and connecting a first nut 22 (back-tightening nut) with the first screw 21 in a threaded manner to enable the fixed block 2 and the lower fixed block 12 to clamp the bearing column 1; installing an upper extrusion block 2; installing a lower extrusion block 10 and supporting the lower extrusion block with a hoisting device in an auxiliary manner; installing a locking cylinder 4, wherein a piston rod 41 of the locking cylinder penetrates through the upper extrusion block 2 and the lower extrusion block 10, and the lower end of the locking cylinder is connected with a third nut 42 (a back nut) in a threaded manner; and connecting a hydraulic hose.

Before the fatigue test is carried out, the piston of the locking cylinder 4 is controlled to move upwards, and at the moment, the upper extrusion block 2 and the lower extrusion block 10 move towards the bearing column 1 to extrude the upper top block 6 and the lower top block 9 on the right side and the fixed block 2 and the lower fixed block 12 on the left side. Because the fixed block 2 and the lower fixed block 12 are fixed relative to the bearing column 1, the upper ejector block 6 and the lower ejector block 9 can push the movable cross beam 7 to move rightwards, so that the movable cross beam 7 is attached to the pin shaft 8, after the pin shaft 8 is attached to and extrudes the pin hole of the bearing beam 1, the locking cylinder 4 keeps the current pressure, and the purpose of eliminating gaps between the movable cross beam 7 and the pin shaft 8 and between the pin shaft 8 and the bearing beam 1 can be achieved.

After the test is finished, when the locking tool needs to be disassembled, the piston and the piston rod of the locking cylinder 4 are controlled to move downwards to be separated from the retracted state; the electromagnetic valve controls hydraulic oil to enter the upper end of the first disassembling piston 5 and the lower end of the second disassembling piston 101, and the two disassembling pistons respectively prop against the bearing column 1, so that the upper extrusion block 3 and the lower extrusion block 10 are extruded out of a test space; and disassembling each back nut, and recovering each fixed block, each jacking block and each extrusion block.

The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.

Claims (7)

1. A locking device, comprising: the device comprises an upper fixing block (2), an upper extrusion block (3), a locking cylinder (4), an upper ejection block (6), a lower ejection block (9), a lower extrusion block (10) and a lower fixing block (12), wherein the upper fixing block (2), the upper extrusion block (3) and the upper ejection block (6) are sequentially arranged above a bearing column (1) of the testing machine from left to right, the lower fixing block (12), the lower extrusion block (10) and the lower ejection block (9) are sequentially arranged below the bearing column (1) of the testing machine from left to right, the upper fixing block (2) and the lower fixing block (12) are fixedly connected with the bearing column (1), the upper ejection block (6) and the lower ejection block (9) are fixedly connected and can move left and right along the bearing column (1),

inclined planes are formed on the left side and the right side of the upper extrusion block (3), the inclined plane on the left side of the upper extrusion block (3) is in contact with and matched with the inclined plane of the upper fixing block (2), the inclined plane on the right side of the upper extrusion block (3) is in contact with and matched with the inclined plane of the upper ejector block (6), and a gap exists between the lower bottom surface of the upper extrusion block (3) and the bearing column (1); inclined planes are formed on the left side and the right side of the lower extrusion block (10), the inclined plane on the left side of the lower extrusion block (10) is in contact with and matched with the inclined plane of the lower fixing block (12), the inclined plane on the right side of the lower extrusion block (10) is in contact with and matched with the inclined plane of the lower ejector block (9), and a gap exists between the upper top surface of the lower extrusion block (10) and the bearing column (1);

the cylinder body and last extrusion piece (3) fixed connection of locking cylinder (4), piston rod (41) of locking cylinder (4) pass in proper order on extrusion piece (3), bear post (1) and down behind extrusion piece (10) with third nut (42) threaded connection, extrusion piece (3) and lower extrusion piece (10) move to being close to and bearing post (1) direction in the drive of locking cylinder (4), it moves to go up kicking block (6) on kicking block (6) drive in the extrusion of kicking block (3) to move, kicking block (9) are moved down in kicking block (9) drive down in extrusion piece (10) extrusion down.

2. A locking device according to claim 1, wherein: the included angle between the inclined plane of the left side and the inclined plane of the right side of the upper extrusion block (3) and the lower bottom surface of the upper extrusion block (3) is an obtuse angle, and the included angle between the inclined plane of the left side and the inclined plane of the right side of the lower extrusion block (10) and the upper top surface of the lower extrusion block (10) is an obtuse angle.

3. A locking device according to claim 1, wherein: also comprises a first disassembly cylinder piston (5), a first disassembly cylinder cover plate (51) and a first screw (52), the left side and the right side of the upper extrusion block (3) are respectively provided with a first step blind hole (31), the first dismounting cylinder cover plate (51) is arranged at the step of the first step blind hole (31), the first screw (52) passes through the first disassembling cylinder cover plate (51) and the step of the first step blind hole (31) and then is in threaded connection with the upper extrusion block (3), the first disassembly cylinder piston (5) comprises a first piston part and a first piston rod part, the diameter of the first piston part is larger than that of the first piston rod part, the first piston part is connected with the first step blind hole (31) in a sliding mode, the first piston rod part penetrates through the first disassembling cylinder cover plate (51) and is connected with the first disassembling cylinder cover plate (51) in a sliding mode, and the end part of the first piston rod part is in contact with the bearing column (1);

still dismantle jar piston (101), jar apron and second screw are dismantled to the second including the second, extrude piece (10) left and right sides respectively and be formed with second step blind hole down, the second is dismantled the step department that jar apron set up at second step blind hole (102), the second screw passes behind the step of second dismantlement jar apron and second step blind hole (102) and extrudees a threaded connection down, jar piston (101) are dismantled including second piston portion and second piston rod portion to the second, the diameter of second piston portion is greater than the diameter of second piston rod portion, second piston portion and second step blind hole (102) sliding connection, cylinder apron and with second dismantlement jar apron sliding connection are dismantled to the second piston rod portion passing the second, second piston rod portion tip and bearing post (1) contact.

4. A locking device according to claim 1, wherein: go up kicking block (6) and the right side of kicking block (9) down and be provided with movable cross beam (7), go up kicking block (6) and kicking block (9) down and all contact with movable cross beam (7), round pin axle (8) pass movable cross beam (7) and bearing post (1).

5. A locking device according to claim 1, wherein: the upper fixing block (2) is provided with a first protruding part which is inserted into the through hole at the left upper side of the bearing column (1) and is matched with the through hole at the left upper side of the bearing column (1),

the lower fixing block (12) is provided with a second protruding part, the first protruding part is inserted into the through hole at the left lower side of the bearing column (1) and is matched with the through hole at the left lower side of the bearing column (1),

the first screw (21) penetrates through the upper fixing block (2), the bearing column (1) and the lower fixing block (12), and the upper side and the lower side of the first screw (21) are in threaded connection with the first nut (22) to limit axial movement of the upper fixing block (2) and the lower fixing block (12).

6. A locking device according to claim 1, wherein: the second screw rod (61) penetrates through the upper fixing block (2), the bearing column (1) and the lower fixing block (12), the upper side and the lower side of the second screw rod (61) are in threaded connection with the second nut (62) to enable the upper fixing block (2) and the lower fixing block (12) to be respectively in contact with the bearing column (1), and the second nut (62) penetrates through the two through holes in the right side of the bearing column (1) and has a gap with the two through holes in the right side.

7. A locking device according to claim 1, wherein: and a piston rod of the locking cylinder (4) penetrates through the two through holes in the middle of the bearing column (1) and a gap exists between the piston rod and the two through holes in the middle.

Images