Fatigue test device for loading arm

Abstract

The invention relates to the field of test facilities, in particular to a loading arm fatigue test device which comprises a test bed, a threaded part is mounted on one side of the upper end of the test bed, two main clamping rings are symmetrically mounted at the end of the threaded part and are horizontally arranged, a test piece is mounted on the other side of the upper end of the test bed, and a clamping ring is mounted on the test piece. The end part of the test piece is connected with a frame body, two auxiliary clamping rings are symmetrically and elastically arranged on the inner side of the frame body, the two auxiliary clamping rings are vertically arranged, a push rod is arranged above the frame body in a sliding manner, two ends of the push rod are connected with clamping frames, and one ends of the two clamping frames are respectively connected with the two auxiliary clamping rings. According to the invention, the convenience of a fatigue test is improved, the normal proceeding of the fatigue test is ensured, and meanwhile, the loading arm is ensured not to loosen in the test process.

Description

Technical Field

[0001] The invention relates to the field of test facilities, in particular to a crane pipe fatigue test device. Background Art

[0002] The crane pipe, also known as the fluid loading and unloading arm, is a telescopic and movable pipe. It is connected to the rigid pipe and elbow with a rotating joint to realize the movable connection of the liquid medium between the train, the tank car and the trestle storage and transportation pipeline. In order to ensure the quality of the crane pipe, it is usually necessary to perform fatigue tests on the tightening joints of the crane pipe.

[0003] However, during use of the existing test device, it is necessary to first lock and fix the horizontal section of the crane pipe, and then lock and fix the vertical section of the crane pipe before the fatigue test can be carried out. The operation process requires secondary locking to fix the crane pipe. The fixing process is quite cumbersome, which seriously affects the convenience of the fatigue test. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a fatigue test device for crane pipes.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a fatigue test device for a crane pipe, comprising a test bench, a threaded part is installed on one side of the upper end of the test bench, two main clamping rings are symmetrically installed on the ends of the threaded part, and the two main clamping rings are horizontally arranged; a test piece is installed on the other side of the upper end of the test bench, and the end of the test piece is connected to a frame, and two auxiliary clamping rings are symmetrically and elastically installed on the inner side of the frame, and the two auxiliary clamping rings are vertically arranged; a push rod is slidably installed on the top of the frame, and both ends of the push rod are connected to clamping frames, and one end of the two clamping frames is respectively connected to the two auxiliary clamping rings, a push wheel is connected to the middle part of the push rod, and a ring rail is fitted on the side of the push wheel, and the ring rail is connected to the threaded part.

[0006] Preferably, guide pillars are fixedly installed on the lower parts of the opposite ends of the two auxiliary clamping rings, and the two guide pillars respectively extend through the front and rear ends of the frame. The guide pillars are slidably matched with the frame, and the ends of the guide pillars are coaxially inlaid with column caps. A return spring is wound around the outside of the guide pillars, one end of the return spring is fixed to the column cap, and the other end of the return spring is fixed to the frame.

[0007] Preferably, a guide shell is embedded through the side corner of the frame, a rod guide seat is slidably installed inside the guide shell, the rod guide seat passes through the end of the guide shell, the end of the rod guide seat is fixed to the push rod, and a wheel seat is installed on the outer side of the push wheel, and the end of the wheel seat is fixed to the push rod.

[0008] Preferably, a No. 1 lug extends from the middle of the opposite ends of the two auxiliary clamping rings, one end of the clamping frame is rotatably connected to the end of the No. 1 lug, and the other end of the clamping frame is rotatably mounted with a No. 2 lug, and the end of the No. 2 lug is fixed to the push rod.

[0009] Preferably, the threaded member includes a main frame fixedly installed on one side of the upper end of the test bench, a connecting frame fixedly installed on the rear end of the main frame, a threaded rod rotatably installed on the end of the connecting frame, the threads at both ends of the threaded rod are symmetrically arranged, and two threaded sleeves are symmetrically tightened on the outer surface of the threaded rod, and a fixing ring frame is fixedly installed on the upper ends of the two threaded sleeves, and the ends of the two fixing ring frames are respectively fixed to the two main clamping rings, and a positioning support ring is fixedly installed on the end of the main frame.

[0010] Preferably, a guide frame is fixedly installed on the lower end of the connecting frame, and a concave groove extends from the lower end of the threaded sleeve, and the concave groove is slidably installed on the outer surface of the guide frame, and a push ring frame is fixedly installed on the front end of one of the threaded sleeves, and the push ring frame slides through the side of the main frame, and the end of the push ring frame is fixed to the ring rail, and the center line of the positioning support ring is colinear with the center line of the ring rail.

[0011] Preferably, the test piece includes a sub-frame fixedly mounted on the other side of the upper end of the test bench, a load-bearing shaft is rotatably mounted on the end of the sub-frame, a center line of the load-bearing shaft is colinear with a center line of the positioning support ring, a swing frame is fixedly mounted on one end of the load-bearing shaft, an end of the swing frame is fixed to the frame, a gear is coaxially inlaid on the other end of the load-bearing shaft, a tooth plate is meshed at the lower part of the gear, a T-shaped slide plate extends from the side of the tooth plate, and the T-shaped slide plate is slidably mounted on the sub-frame.

[0012] Preferably, a motor frame is provided on the other side of the upper end of the test bench near the side of the sub-frame, a servo motor is fixedly mounted on the end of the motor frame, a frame ear is inlaid on the output end of the servo motor, a push plate frame is rotatably mounted on the end of the frame ear, and the end of the push plate frame is rotatably connected to the gear plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By rotating the threaded rod, the two threaded sleeves can be driven to move toward each other under the action of the symmetrical arrangement of the threads at both ends of the threaded rod, thereby driving the two main clamping rings to move toward each other to clamp the horizontal section of the crane pipe. In this process, the moving threaded sleeve will also drive the ring rail to move through the push ring frame, so as to push the push wheel through the ring rail to allow the push rod to move. At this time, the rod guide seat slides in the guide shell to guide the push rod, so that the moving push rod can drive the two clamping frames to move, so as to push the auxiliary clamping ring, so that the two auxiliary clamping rings can move toward each other to clamp the vertical section of the crane pipe. In this way, the crane pipe can be fixed by a single locking, and there is no need for a secondary locking operation in the process, which effectively improves the convenience of fatigue testing.

[0014] 2. When the swing frame is swinging to drive the vertical section of the crane pipe to swing, the push wheel will synchronously roll back and forth in a circular arc on the ring rail to adapt to the swinging movement of the vertical section of the crane pipe to ensure the normal progress of the fatigue test. At the same time, during the test, it can also ensure that the ring rail always tightens the push wheel, and then tightens the auxiliary clamp ring moving in opposite directions, so that the auxiliary clamp ring can always keep holding the crane pipe tightly, thereby ensuring that the crane pipe will not loosen during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a crane pipe fatigue test device of the present invention; Figure 2 The present invention is a kind of crane pipe fatigue test device Figure 1 A magnified view of middle; Figure 3 It is a schematic diagram of a secondary clamp ring of a crane pipe fatigue test device of the present invention; Figure 4 It is a schematic diagram of a reset spring for a crane pipe fatigue test device of the present invention; Figure 5 This is a schematic diagram of a main clamping ring of a crane pipe fatigue test device according to the present invention; Figure 6 The present invention is a view of a crane pipe fatigue test device in use.

[0016] In the figure: 1, test bench; 2, main frame; 3, push ring frame; 4, connecting frame; 5, main clamping ring; 6, positioning support ring; 7, ring rail; 8, auxiliary clamping ring; 9, auxiliary frame; 10, servo motor; 11, motor frame; 12, threaded rod; 13, fixed ring frame; 14, threaded sleeve; 15, concave groove; 16, guide frame; 17, load-bearing shaft; 18, swing frame; 19, gear; 20, tooth plate; 21, T-shaped slide plate; 22, push plate frame; 23, frame ear; 24, push rod; 25, push wheel; 26, clamping frame; 27, frame; 28, guide column; 29, reset spring; 30, No. 1 lug; 31, wheel seat; 32, column cap; 33, guide shell; 34, rod guide seat; 35, No. 2 lug; 36, crane pipe. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] like Figure 1-Figure 6 The fatigue test device for a crane pipe shown in the figure comprises a test bench 1, a threaded member is installed on one side of the upper end of the test bench 1, two main clamping rings 5 ​​are symmetrically installed on the ends of the threaded member, and the two main clamping rings 5 ​​are arranged horizontally, which can adapt to the horizontal section of the crane pipe 36 for clamping, and a test piece is installed on the other side of the upper end of the test bench 1, and the end of the test piece is connected to a frame 27, and two auxiliary clamping rings 8 are symmetrically elastically installed on the inner side of the frame 27, and the frame 27 plays a role in bearing the auxiliary clamping rings 8. The two auxiliary clamping rings 8 are arranged vertically, which can adapt to The vertical section of the crane pipe 36 is clamped, and a push rod 24 is slidably installed on the top of the frame 27. Both ends of the push rod 24 are connected to clamp frames 26. The push rod 24 drives the clamp frames 26 to move. One end of the two clamp frames 26 is respectively connected to two auxiliary clamp rings 8, and the clamp frames 26 push the auxiliary clamp rings 8. A push wheel 25 is connected to the middle of the push rod 24, and a ring rail 7 is fitted on the side of the push wheel 25. The ring rail 7 is connected to a threaded part, and the ring rail 7 can push the push wheel 25, thereby moving the push rod 24.

[0019] Guide pillars 28 are fixedly installed on the lower parts of the opposite ends of the two auxiliary clamping rings 8. The two guide pillars 28 extend through the front and rear ends of the frame 27 respectively. The guide pillars 28 guide the auxiliary clamping rings 8. The guide pillars 28 are slidably matched with the frame 27. The ends of the guide pillars 28 are coaxially inlaid with column caps 32. The outer sides of the guide pillars 28 are wrapped with return springs 29. The column caps 32 are pushed by the return springs 29. One end of the return spring 29 is fixed to the column caps 32, and the other end of the return spring 29 is fixed to the frame 27. The return spring 29 can return the auxiliary clamping ring 8 to its original position after being moved.

[0020] A guide shell 33 is embedded in the side corner of the frame 27, and a rod guide seat 34 is slidably installed inside the guide shell 33. The guide shell 33 and the rod guide seat 34 play a role in guiding the push rod 24. The rod guide seat 34 extends from the end of the guide shell 33, and the end of the rod guide seat 34 is fixed to the push rod 24. A wheel seat 31 is installed on the outer side of the push wheel 25. The wheel seat 31 plays a role in supporting the push wheel 25, and the end of the wheel seat 31 is fixed to the push rod 24.

[0021] A No. 1 lug 30 extends from the middle of the opposite ends of the two auxiliary clamping rings 8. One end of the clamping frame 26 is rotatably connected to the end of the No. 1 lug 30. The No. 1 lug 30 serves to facilitate the connection of the clamping frame 26. A No. 2 lug 35 is rotatably installed on the other end of the clamping frame 26. The end of the No. 2 lug 35 is fixed to the push rod 24. The No. 2 lug 35 serves to facilitate the connection of the clamping frame 26.

[0022] The threaded part includes a main frame 2 fixedly installed on one side of the upper end of the test bench 1, and a connecting frame 4 is fixedly installed on the rear end of the main frame 2. The main frame 2 plays a role in supporting the positioning support ring 6. A threaded rod 12 is rotatably installed on the end of the connecting frame 4. The connecting frame 4 plays a role in supporting the threaded rod 12. The threads at both ends of the threaded rod 12 are symmetrically arranged, which can drive the two threaded sleeves 14 to move toward each other, and then drive the two main clamping rings 5 ​​to move toward each other. Two threaded sleeves 14 are symmetrically tightened on the outer surface of the threaded rod 12. The upper ends of the two threaded sleeves 14 are fixedly installed with a fixing ring frame 13. The fixing ring frame 13 plays a role in fixing the threaded sleeve 14 and the main clamping ring 5 together. The ends of the two fixing ring frames 13 are respectively fixed to the two main clamping rings 5. The end of the main frame 2 is fixedly installed with a positioning support ring 6. The positioning support ring 6 can position the crane pipe 36 so that the rotation center of the rotating joint of the crane pipe 36 can be coaxial with the load-bearing shaft 17 to ensure that the vertical section of the crane pipe 36 will not be hindered when it is driven to swing.

[0023] A guide frame 16 is fixedly installed at the lower end of the connecting frame 4, and a concave groove 15 extends from the lower end of the threaded sleeve 14. The guide frame 16 and the concave groove 15 play a role in guiding the threaded sleeve 14. The concave groove 15 is slidably installed on the outer surface of the guide frame 16. A push ring frame 3 is fixedly installed at the front end of one of the threaded sleeves 14. The push ring frame 3 slides through the side of the main frame 2. On the one hand, the push ring frame 3 plays a role in fixing the ring rail 7 and one of the threaded sleeves 14 together. On the other hand, the push ring frame 3 can slide on the main frame 2 to guide the ring rail 7. The end of the push ring frame 3 is fixed to the ring rail 7, and the center line of the positioning support ring 6 is colinear with the center line of the ring rail 7, which can ensure that the push wheel 25 always rolls on the ring rail 7 when the vertical section pipeline of the crane pipe 36 swings.

[0024] The test piece includes a sub-frame 9 fixedly installed on the other side of the upper end of the test bench 1, and a load-bearing shaft 17 is rotatably installed at the end of the sub-frame 9. The sub-frame 9 supports the load-bearing shaft 17. The center line of the load-bearing shaft 17 is colinear with the center line of the positioning support ring 6. A swing frame 18 is fixedly installed at one end of the load-bearing shaft 17. The end of the swing frame 18 is fixed to the frame 27, and the swing frame 18 drives the frame 27 to swing. A gear 19 is coaxially inlaid at the other end of the load-bearing shaft 17. A toothed plate 20 is meshed at the lower part of the gear 19. A T-shaped slide plate 21 extends from the side of the toothed plate 20. The toothed plate 20 can drive the gear 19 to rotate. The T-shaped slide plate 21 is slidably installed on the sub-frame 9, and the T-shaped slide plate 21 guides the toothed plate 20.

[0025] A motor frame 11 is provided on the other side of the upper end of the test bench 1 near the side of the sub-frame 9, and a servo motor 10 is fixedly installed at the end of the motor frame 11. The motor frame 11 plays a role of supporting and fixing the servo motor 10. A frame ear 23 is inlaid at the output end of the servo motor 10, and a push plate frame 22 is rotatably installed at the end of the frame ear 23. The frame ear 23 plays a role in driving the push plate frame 22 to move. The end of the push plate frame 22 is rotatably connected to the tooth plate 20, and the push plate frame 22 plays a role in driving the tooth plate 20 to reciprocate.

[0026] During the test, the crane pipe 36 is placed on the positioning support ring 6 for positioning, and then the threaded rod 12 is rotated, so that the two threaded sleeves 14 are driven to move toward each other under the action of the symmetrical arrangement of the threads at both ends of the threaded rod 12, and then the two main clamping rings 5 ​​are driven to move toward each other, so as to hold the horizontal section of the crane pipe 36 tightly. In this process, the moving threaded sleeve 14 will also drive the ring rail 7 to move through the push ring frame 3, so as to push the push wheel 25 through the ring rail 7, so that the push rod 24 can move. At this time, the rod guide seat 34 slides in the guide shell 33 to guide the push rod 24, so as to use the moving push rod 24 to drive the two clamping frames 26 to move, so as to push the auxiliary clamping ring 8. The two auxiliary clamping rings 8 move toward each other to hold the vertical section of the crane pipe 36 tightly. Then the servo motor 10 works to drive the frame ear 23 to rotate, so that the rotating frame ear 23 drives the push plate frame 22 to move, so as to push the tooth plate 20, so that the tooth plate 20 can move back and forth. At this time, the T-shaped slide plate 21 slides on the auxiliary frame 9 to guide the tooth plate 20, so that the reciprocating tooth plate 20 drives the gear 19 to rotate, and then drives the swing frame 18 on the load-bearing shaft 17 to swing. At this time, the vertical section of the crane pipe 36 swings synchronously under the drive of the swing frame 18, so as to perform a fatigue test on the rotating joint of the crane pipe 36.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A crane pipe fatigue test device, comprising a test bench (1), characterized in that: A threaded component is installed on one side of the upper end of the test bench (1), and two main clamping rings (5) are symmetrically installed at the ends of the threaded component. The two main clamping rings (5) are arranged horizontally. A test piece is installed on the other side of the upper end of the test bench (1), and the end of the test piece is connected to a frame (27). Two auxiliary clamping rings (8) are symmetrically and elastically installed on the inner side of the frame (27). The two auxiliary clamping rings (8) are arranged vertically. A push rod (24) is slidably installed above the frame (27), and both ends of the push rod (24) are connected to clamping frames (26). One end of the two clamping frames (26) is respectively connected to the two auxiliary clamping rings (8). A push wheel (25) is connected to the middle part of the push rod (24), and a ring rail (7) is fitted on the side of the push wheel (25). The ring rail (7) is connected to the threaded component.

2. A crane pipe fatigue test device according to claim 1, characterized in that: Guide pillars (28) are fixedly mounted on the lower parts of the opposite ends of the two auxiliary clamping rings (8), and the two guide pillars (28) extend through the front and rear ends of the frame (27) respectively. The guide pillars (28) are slidably matched with the frame (27), and a pillar cap (32) is coaxially inlaid on the end of the guide pillar (28). A return spring (29) is wound around the outer side of the guide pillar (28), one end of the return spring (29) is fixed to the pillar cap (32), and the other end of the return spring (29) is fixed to the frame (27).

3. The fatigue test device for crane pipe according to claim 1, characterized in that: A guide housing (33) is embedded in the side corner of the frame (27), a rod guide seat (34) is slidably mounted inside the guide housing (33), the rod guide seat (34) extends through the end of the guide housing (33), the end of the rod guide seat (34) is fixed to the push rod (24), and a wheel seat (31) is mounted on the outer side of the push wheel (25), the end of the wheel seat (31) is fixed to the push rod (24).

4. The fatigue test device for crane pipe according to claim 1, characterized in that: A No. 1 lug (30) is extended from the middle of the opposite ends of the two auxiliary clamping rings (8), one end of the clamping frame (26) is rotatably connected to the end of the No. 1 lug (30), and a No. 2 lug (35) is rotatably mounted on the other end of the clamping frame (26), and the end of the No. 2 lug (35) is fixed to the push rod (24).

5. The crane pipe fatigue test device according to claim 1, characterized in that: The threaded member comprises a main frame (2) fixedly mounted on one side of the upper end of the test bench (1), a connecting frame (4) fixedly mounted on the rear end of the main frame (2), a threaded rod (12) rotatably mounted on the end of the connecting frame (4), the threads at both ends of the threaded rod (12) being symmetrically arranged, two threaded sleeves (14) being symmetrically screwed on the outer surface of the threaded rod (12), a fixing ring frame (13) fixedly mounted on the upper ends of the two threaded sleeves (14), the ends of the two fixing ring frames (13) being respectively fixed to the two main clamping rings (5), and a positioning support ring (6) fixedly mounted on the end of the main frame (2).

6. A crane pipe fatigue test device according to claim 5, characterized in that: A guide frame (16) is fixedly mounted on the lower end of the connecting frame (4), a concave groove (15) is extended from the lower end of the threaded sleeve (14), and the concave groove (15) is slidably mounted on the outer surface of the guide frame (16), a push ring frame (3) is fixedly mounted on the front end of one of the threaded sleeves (14), and the push ring frame (3) slides through the side of the main frame (2), the end of the push ring frame (3) is fixed to the ring rail (7), and the center line of the positioning support ring (6) is colinear with the center line of the ring rail (7).

7. The fatigue test device for crane pipe according to claim 5, characterized in that: The test piece comprises a sub-frame (9) fixedly mounted on the other side of the upper end of the test bench (1); a load-bearing shaft (17) is rotatably mounted on the end of the sub-frame (9); the center line of the load-bearing shaft (17) is colinear with the center line of the positioning support ring (6); a swing frame (18) is fixedly mounted on one end of the load-bearing shaft (17); the end of the swing frame (18) is fixed to a frame (27); a gear (19) is coaxially embedded on the other end of the load-bearing shaft (17); a toothed plate (20) is meshed at the lower part of the gear (19); a T-shaped slide plate (21) extends from the side of the toothed plate (20); and the T-shaped slide plate (21) is slidably mounted on the sub-frame (9).

8. The crane pipe fatigue test device according to claim 7, characterized in that: A motor frame (11) is provided on the other side of the upper end of the test bench (1) near the side of the auxiliary frame (9), a servo motor (10) is fixedly mounted on the end of the motor frame (11), a frame ear (23) is embedded in the output end of the servo motor (10), a push plate frame (22) is rotatably mounted on the end of the frame ear (23), and the end of the push plate frame (22) is rotatably connected to the gear plate (20).

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