Metal corrugated pipe friction wear experiment device and experiment method thereof

Abstract

The invention discloses a metal corrugated pipe friction wear experiment device and an experiment method thereof.The device comprises a vibration table, a test bed and a corrugated pipe fixing mechanism, the vibration table is located at one end of the test bed, and a steel wire fixing mechanism is installed on the test bed; the corrugated pipe fixing mechanism comprises two V-shaped frames, and pressing blocks used for fixing metal corrugated pipes are fixed to the tops of the V-shaped frames. The two V-shaped frames are respectively fixed on the vibration table and the test table and are used for fixing the two ends of the metal corrugated pipe; the steel wire fixing mechanism comprises two fixing bases which are oppositely arranged, a steel wire fixing assembly and a steel wire tensioning assembly which can adjust the height up and down are installed on the two fixing bases correspondingly, the steel wire fixing assembly is used for fixing one end of a steel wire, and the steel wire tensioning assembly is used for fixing the other end of the steel wire and achieving steel wire tensioning; the two fixing bases are obliquely arranged so that the angle of the steel wire relative to the metal corrugated pipe can be the weaving angle of the metal net sleeve. According to the invention, the frictional wear performance of the metal bellows can be simply and effectively measured.

Description

Technical Field

[0001] The invention relates to metal bellows performance detection, in particular to a metal bellows friction and wear experimental device and an experimental method thereof. Background Art

[0002] Metal bellows are mainly composed of bellows, metal mesh sleeves and joints. During actual use, the bellows and the metal mesh sleeves will undergo relative displacement and wear. In severe cases, the bellows may be worn through, causing pipeline leakage. Summary of the invention

[0003] Purpose of the invention: The purpose of the invention is to provide a metal bellows friction and wear experimental device and an experimental method thereof to study the friction performance of the metal bellows.

[0004] Technical solution: The metal bellows friction and wear experimental device of the present invention comprises a vibration table, a test bench and a bellows fixing mechanism, wherein the vibration table is located at one end of the test bench and a steel wire fixing mechanism is installed on the test bench;

[0005] The bellows fixing mechanism comprises two V-shaped frames, a pressing block is fixed on the top of the V-shaped frame, and the pressing block cooperates with the V-shaped groove on the V-shaped frame to fix the metal bellows; the two V-shaped frames are respectively fixed on the vibration table and the test table, and are used to fix the two ends of the metal bellows;

[0006] The steel wire fixing mechanism includes two relatively arranged fixed bases, on which are respectively installed a steel wire fixing assembly and a steel wire tensioning assembly whose heights can be adjusted up and down. The steel wire fixing assembly is used to fix one end of the steel wire, and the steel wire tensioning assembly is used to fix the other end of the steel wire and realize steel wire tensioning; the two fixed bases are arranged at an angle so that the angle of the steel wire relative to the metal corrugated pipe is the braiding angle of the metal mesh sleeve.

[0007] Furthermore, the steel wire fixing assembly includes a fixing block, the upper part of the fixing base has an open groove, the fixing block is arranged in the open groove and fixed on the fixing base by a first bolt; the fixing block is provided with a steel wire fixing piece for fixing one end of the steel wire.

[0008] Furthermore, the wire tensioning assembly includes a second bolt, a U-shaped member and a connecting member, the U-shaped member is arranged in an open groove of the fixed base and is fixed to the fixed base by a first bolt; a horizontal slide rail is arranged on the inner wall of the U-shaped member and a slider is slidably arranged; one end of the connecting member has a first pancake-shaped protrusion, one end of the slider has a corresponding first embedding groove, and one end of the connecting member is rotatably embedded in the first embedding groove; the second bolt is screwed onto the U-shaped member, and the end of the second bolt is fixedly connected to the other end of the connecting member; the other end of the slider is provided with a wire fixing member for fixing the other end of the steel wire.

[0009] Furthermore, the end of the second bolt has an internal thread, and the other end of the connecting piece has a matching external thread, and the two are threadedly connected.

[0010] Furthermore, one end of the wire fixing piece has an end face blind hole and a side face blind hole connected to the end face blind hole. The wire passes through the end face blind hole and out of the side face blind hole, and is wrapped around the wire fixing piece for several turns to fix the wire.

[0011] Furthermore, the other end of the steel wire fixing piece has a second pancake-shaped protrusion, and the other end of the sliding block and the fixing block have a matching second embedding groove, and the other end of the steel wire fixing piece is embedded in the second embedding groove.

[0012] Furthermore, the through hole on the fixed base through which the first bolt is passed is a vertical waist-shaped hole, and the first bolt moves up and down in the vertical waist-shaped hole to achieve height adjustment of the U-shaped part and the fixed block.

[0013] Furthermore, two slide grooves with "convex" cross-sections are provided on the end surface of the test bench along the length direction, and two fixed bases are respectively arranged along the two slide grooves and fixed to the test bench by a third bolt. The two ends of the V-shaped frame are arranged along the two slide grooves and fixed to the test bench by a third bolt, and the head end of the third bolt is slidably embedded in the slide groove.

[0014] Furthermore, the V-shaped frame on the vibration table is fixed by screws and gaskets; the pressing block and the V-shaped frame are fastened by a fourth bolt.

[0015] The experimental method of the metal bellows friction and wear experimental device described in the present invention includes: fixing the two ends of the metal bellows on two V-shaped frames respectively, fixing the two ends of the steel wire with a steel wire fixing assembly and a steel wire tensioning assembly and tensioning the steel wire, while keeping the steel wire horizontal and in contact with the metal bellows, and the angle of the steel wire relative to the metal bellows is the braiding angle of the metal mesh sleeve; turning on the vibration table to perform the friction and wear test.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention can simply and effectively measure the friction and wear performance of the metal bellows, thereby understanding the service life of the metal bellows, and providing a basis for reasonably selecting the material of the metal mesh sleeve and reasonably designing the metal bellows structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a metal bellows friction and wear experimental device provided by an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure after the wire fixing mechanism is hidden;

[0019] Figure 3 is a schematic structural diagram of a V-shaped frame in an embodiment of the present invention;

[0020] Figure 4 is a structural schematic diagram of a steel wire fixing mechanism in an embodiment of the present invention;

[0021] Figure 5 is a top view of a wire tensioning assembly in an embodiment of the present invention;

[0022] Figure 6 is a side view of a wire tensioning assembly in an embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the structure of the steel wire fixing member in the embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Attached Figures 1 to 7 The reference numerals in the figures are as follows:

[0026] 1. Vibration table; 2. V-shaped frame; 3. Pressure block; 4. Screw; 5. Gasket; 6. Metal bellows; 7. Third bolt; 8. Test bench; 9. Second bolt; 10. U-shaped piece; 11. Steel wire; 12. Steel wire fixing piece; 13. Fixing block; 14. Fixing base; 15. Connecting piece; 16. Slider.

[0027] like Figures 1 to 7 As shown, an embodiment of the present invention provides a metal bellows friction and wear experimental device, including a vibration table 1, a test bench 8 and a bellows fixing mechanism. The vibration table 1 is located at one end of the test bench 8, and a steel wire fixing mechanism is installed on the test bench 8.

[0028] The bellows fixing mechanism includes two V-shaped frames 2, one of which is fixed on the vibration table 1 by screws 4 and gaskets 5, and the other V-shaped frame 2 is fixed on the test bench 8. The V-shaped frame 2 has a V-shaped groove for supporting the metal bellows 6. The top of the V-shaped frame 2 is fixed with a pressing block 3 by a fourth bolt. The bottom of the pressing block 3 has an arc surface adapted to the metal bellows 6. The pressing block 3 is fixed to the metal bellows 6 by the V-shaped groove. The two V-shaped frames 2 fix the two ends of the metal bellows 6 respectively.

[0029] The steel wire fixing mechanism comprises two fixing bases 14 arranged opposite to each other, and a steel wire fixing assembly and a steel wire tensioning assembly are respectively mounted on the two fixing bases 14 .

[0030] The wire fixing assembly includes a fixing block 13, a fixing base 14 having an open slot on the top, a vertical waist-shaped hole communicating with the open slot on the side, the fixing block 13 is arranged in the open slot, and a first bolt for fixing the fixing block 13 is passed through the vertical waist-shaped hole. The height of the fixing block 13 can be adjusted based on the vertical waist-shaped hole.

[0031] The wire tensioning assembly includes a second bolt 9, a U-shaped member 10 and a connecting member 15. The U-shaped member 10 is also arranged in the open groove of the fixed base 14, and is fixed to the fixed base 14 by the first bolt passing through the vertical waist-shaped hole, and the height of the U-shaped member 10 can be adjusted. A horizontal slide rail is arranged on the inner wall of the U-shaped member 10, and a slider 16 is slidably arranged on the horizontal slide rail. One end of the connecting member 15 has a first pancake-shaped protrusion, and one end of the slider 16 has a matching first embedding groove, which extends to the upper end surface of the slider 16 to form an opening. One end of the connecting member 15 is embedded in the first embedding groove from top to bottom, and can rotate after being embedded. The second bolt 9 is screwed on the U-shaped member 10, and the end of the second bolt 9 has an internal thread, and the other end of the connecting member 15 has a matching external thread, and the two are threadedly connected.

[0032] The fixing block 13 is provided with a wire fixing part 12 for fixing one end of the wire 11. The other end of the slider 16 is provided with a wire fixing part 12 for fixing the other end of the wire 11. Specifically, one end of the wire fixing part 12 has an end face blind hole and a side face blind hole connected to the end face blind hole. The wire 11 passes through the end face blind hole and passes through the side face blind hole, and is wound around the wire fixing part 12 for several turns to fix the wire 11. The other end of the wire fixing part 12 has a second pancake-shaped protrusion, and the other end of the slider 16 and the fixing block 13 have a second matching embedded groove, and the second embedded groove extends horizontally to the boundary on the slider 16 and the fixing block 13 to open so that the other end of the wire fixing part 12 can be embedded in the second embedded groove.

[0033] Two slide grooves are provided on the upper end surface of the test bench 8 along the length direction, and the cross section of the slide groove is "convex". Two fixed bases 14 are respectively arranged along the two slide grooves and fixed to the test bench 8 by the third bolts 7, and the two ends of another V-shaped frame 2 are arranged along the two slide grooves and fixed to the test bench 8 by the third bolts 7. The head end of the third bolt 7 is slidably embedded in the slide groove, so that the position of the fixed base 14 along the slide groove can be adjusted, and the distance between the two V-shaped frames 2 can be adjusted.

[0034] By adjusting the height of the U-shaped member 10 and the fixing block 13 on the corresponding fixing base 14, the height of the steel wire 11 can be adjusted. When the second bolt 9 is rotated, the connecting member 15 rotates accordingly, driving the slider 16 to move along the horizontal slide rail, thereby achieving the tensioning of the steel wire 11. By adjusting the relative position of the two fixing bases 14, the steel wire 11 and the metal corrugated tube 6 can be at 45°, realizing the braiding angle of the simulated wire mesh sleeve.

[0035] The embodiment of the present invention also provides an experimental method for the metal bellows friction and wear experimental device according to the embodiment of the present invention, including:

[0036] First, adjust the distance between the two V-shaped frames 2 according to the length of the metal bellows 6, fix the two V-shaped frames 2 respectively, and fix the pressing block 3 on the V-shaped frame 2 to fix the two ends of the metal bellows 6. Next, fix the two ends of the steel wire 11 on the two steel wire fixing members 12 respectively, adjust the relative position of the two tensioning bases 14 so that the steel wire 11 is 45° with the metal bellows 6, and then fix the two tensioning bases 14 respectively. Rotate the second bolt 9 to tension the steel wire 11, then adjust the height of the U-shaped member 10 and the fixing block 13 so that the steel wire 11 remains horizontal and in contact with the metal bellows 6, and finally turn on the vibration table 1 to conduct the friction and wear test.

Claims

1. A metal bellows friction and wear test device, characterized in that: It comprises a vibration table (1), a test table (8) and a bellows fixing mechanism, wherein the vibration table (1) is located at one end of the test table (8), and a steel wire fixing mechanism is installed on the test table (8); The bellows fixing mechanism comprises two V-shaped frames (2), a pressing block (3) is fixed on the top of the V-shaped frame (2), and the pressing block (3) cooperates with the V-shaped groove on the V-shaped frame (2) to fix the metal bellows (6); the two V-shaped frames (2) are respectively fixed on the vibration table (1) and the test table (8) to fix the two ends of the metal bellows (6); The steel wire fixing mechanism comprises two fixed bases (14) arranged opposite to each other, and a steel wire fixing assembly and a steel wire tensioning assembly which can be adjusted up and down are respectively installed on the two fixed bases (14), the steel wire fixing assembly is used to fix one end of the steel wire (11), and the steel wire tensioning assembly is used to fix the other end of the steel wire (11) and realize the tensioning of the steel wire (11); the two fixed bases (14) are arranged obliquely so that the angle of the steel wire (11) relative to the metal corrugated pipe (6) is the braiding angle of the metal mesh sleeve.

2. The metal bellows friction and wear test device according to claim 1, characterized in that: The steel wire fixing assembly comprises a fixing block (13), the upper part of the fixing base (14) is provided with an open groove, the fixing block (13) is arranged in the open groove and is fixed on the fixing base (14) by a first bolt; and a steel wire fixing piece (12) is arranged on the fixing block (13) for fixing one end of the steel wire (11).

3. The metal bellows friction and wear test device according to claim 2, characterized in that: The steel wire tensioning assembly comprises a second bolt (9), a U-shaped member (10) and a connecting member (15); the U-shaped member (10) is arranged in an open groove of a fixed base (14) and is fixed to the fixed base (14) by a first bolt; a horizontal slide rail is arranged on the inner wall of the U-shaped member (10) and a slider (16) is slidably arranged; one end of the connecting member (15) has a first pancake-shaped protrusion, one end of the slider (16) has a matching first embedding groove, and one end of the connecting member (15) is rotatably embedded in the first embedding groove; the second bolt (9) is screwed onto the U-shaped member (10), and the end of the second bolt (9) is fixedly connected to the other end of the connecting member (15); the other end of the slider (16) is provided with a steel wire fixing member (12) for fixing the other end of the steel wire (11).

4. The metal bellows friction and wear test device according to claim 3, characterized in that: The end of the second bolt (9) has an internal thread, and the other end of the connecting piece (15) has a matching external thread, and the two are threadedly connected.

5. The metal bellows friction and wear test device according to claim 3, characterized in that: One end of the steel wire fixing piece (12) has an end face blind hole and a side face blind hole communicating with the end face blind hole; the steel wire (11) passes through the end face blind hole and passes through the side face blind hole, and is wound around the steel wire fixing piece (12) for several turns to achieve the fixing of the steel wire (11).

6. The metal bellows friction and wear test device according to claim 5, characterized in that: The other end of the wire fixing piece (12) has a second pancake-shaped protrusion, and the other end of the sliding block (16) and the fixing block (13) have a matching second embedding groove, and the other end of the wire fixing piece (12) is embedded in the second embedding groove.

7. The metal bellows friction and wear test device according to claim 3, characterized in that: The through hole on the fixed base (14) through which the first bolt is penetrated is a vertical waist-shaped hole, and the first bolt moves up and down in the vertical waist-shaped hole to achieve height adjustment of the U-shaped member (10) and the fixed block (13).

8. The metal bellows friction and wear test device according to claim 1, characterized in that: The upper end surface of the test bench (8) is provided with two convex-shaped slide grooves along the length direction. Two fixed bases (14) are respectively arranged along the two slide grooves and fixed to the test bench (8) by third bolts (7). The two ends of the V-shaped frame (2) are arranged along the two slide grooves and fixed to the test bench (8) by third bolts (7). The head end of the third bolt (7) is slidably embedded in the slide groove.

9. The metal bellows friction and wear test device according to claim 1, characterized in that: The V-shaped frame (2) on the vibration table (1) is fixed by means of screws (4) and gaskets (5); the pressing block (3) and the V-shaped frame (2) are fastened by means of a fourth bolt.

10. An experimental method for the metal bellows friction and wear experimental device according to any one of claims 1 to 9, characterized in that: include: The two ends of the metal bellows (6) are respectively fixed on two V-shaped frames (2), and the two ends of the steel wire (11) are fixed by a steel wire fixing assembly and a steel wire tensioning assembly, and the steel wire (11) is tensioned, while the steel wire (11) is kept horizontal and in contact with the metal bellows (6), and the angle of the steel wire (11) relative to the metal bellows (6) is the braiding angle of the metal mesh sleeve; the vibration table (1) is turned on to carry out a friction and wear test.

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