Floating type pipe die rotary supporting device of cast iron pipe centrifugal machine

Abstract

The invention relates to the technical field of cast iron pipe production equipment, and provides a cast iron pipe centrifugal machine floating type pipe die rotary supporting device which comprises a connecting flange, a clamping ring, a centering ring and a V-shaped belt wheel, the V-shaped belt wheel is fixed with the centering ring; the centering ring is fixed with the clamping ring, and the clamping ring and the centering ring are used for clamping a socket flange of a pipe die; the rear surface of the connecting flange is fixedly connected with a water jacket of the cast iron pipe centrifugal machine; a first blocking roller and a second blocking roller are arranged on the left side of the front surface of the connecting flange; the first blocking roller and the third blocking roller extend into the V-shaped belt wheel and are close to the inclined face of the rear end of the V-shaped belt wheel. The pipe die can be accurately positioned, the floating type structure is adopted, the influences of vibration, thermal expansion and the like of the pipe die can be greatly reduced, the overall stability of a centrifugal machine during production and operation is improved, equipment faults are reduced, meanwhile, the production rate and the qualification rate of products are greatly improved, the service life of other parts of equipment is prolonged, and the installation and adjustment difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cast iron pipe production equipment, and in particular to a floating pipe mold rotary support device for a cast iron pipe centrifuge. Background Art

[0002] The pipe mold rotating support device (i.e., the machine head) is one of the most important components of the water-cooled cast iron pipe centrifuge. The pipe mold of the cast iron pipe is fixed to the large pulley of the pipe mold rotating support device through a centering ring and a clamping ring. The water-cooled cast iron pipe centrifuge has a water jacket. The high-power variable frequency motor on the water jacket drives the small pulley, and then transmits the driving force to the large pulley of the pipe mold rotating support device through multiple sets of V-belts, thereby driving the rotation of the pipe mold. The pipe mold rotating support device is set at the socket position of the pipe mold, and multiple sets of pipe mold support roller devices are matched at the pipe body and the socket position of the pipe mold to assist rotation and support. The structure, manufacturing accuracy and working stability of the pipe mold rotating support device play a vital role in the production of cast iron pipes.

[0003] The traditional cast iron pipe centrifuge pipe mold rotating support device uses a larger-sized rolling bearing (it is necessary to consider the bearing's speed, lubrication, precision and other parameters, and the cost is relatively high) as the main structural form of support rotation and centering, and cooperates with the pipe mold support roller device in the water jacket to complete the support and positioning of the pipe mold. In the actual production process over the years, it was found that, especially for medium and large-sized water-cooled cast iron pipe centrifuges, it is difficult to ensure high and consistent positioning accuracy through processing for the installation position of the pipe mold support roller device and the pipe mold rotating support device in the water jacket. Each time the pipe mold is replaced, a lot of time is required to adjust the coaxiality of the pipe mold in the water jacket to minimize the vibration and beating of the pipe mold to ensure the qualified rate of the cast iron pipe produced; at the same time, the working environment of the pipe mold rotating support device is complex, and it is necessary to comprehensively consider factors such as bearing lubrication, waterproofing, and heat release, resulting in a high failure rate of the pipe mold rotating support device and a high maintenance cost. In addition, the current pipe mold rotating support device adopts rigid positioning for the pipe mold. In production, the vibration caused by the high centrifugal speed of the pipe mold and the thermal expansion of the pipe mold caused by the high temperature of the molten iron cannot be buffered and eliminated, which will eventually act on the pipe mold supporting rollers and the bearings of the pipe mold rotating support device, greatly affecting the equipment. Summary of the invention

[0004] The present invention mainly solves the technical problems of the pipe mold rotating support device in the prior art, such as it is difficult to ensure consistent positioning accuracy between the pipe mold rotating support device and the pipe mold supporting roller device, and each time the pipe mold is replaced, a lot of time is needed to adjust the coaxiality of the pipe mold in the water jacket, etc. A floating pipe mold rotating support device for a cast iron pipe centrifuge is proposed, which can accurately position the pipe mold and adopt a floating structure, which can greatly reduce the vibration and thermal expansion of the pipe mold, improve the overall stability of the centrifuge during production and operation, reduce equipment failures, and at the same time greatly improve the productivity and qualified rate of the product, extend the service life of other parts of the equipment, and reduce the difficulty of installation and adjustment.

[0005] The present invention provides a floating pipe mold rotary support device for a cast iron pipe centrifuge, comprising: a connecting flange and a floating clamping ring, a centering ring and a V-belt pulley;

[0006] The rear surface of the connecting flange is fixedly connected to the water jacket of the cast iron pipe centrifuge, and the connecting flange is fixedly connected to the first flange; a fire hose is flexibly connected between the first flange and the second flange; the second flange is fixedly connected to the heat-resistant rubber sealing ring seat; a heat-resistant rubber sealing ring is arranged on the inner side of the heat-resistant rubber sealing ring seat;

[0007] The V-belt pulley is fixed to the centering ring; the centering ring is fixed to the clamping ring, and the clamping ring and the centering ring clamp the socket flange of the pipe mold;

[0008] The rear end of the V-belt pulley is fixed with a sealing ring; the sealing ring is in contact with the heat-resistant rubber sealing ring but is not fixed;

[0009] The left side of the front surface of the connecting flange is provided with a first stop roller and a second stop roller, and the right side is provided with a third stop roller;

[0010] The first stop roller and the third stop roller respectively extend into the V-belt pulley and are close to the rear end inclined surface of the V-belt pulley, and a gap is reserved between the first stop roller and the third stop roller and the V-belt pulley; the second stop roller extends into the V-belt pulley and is close to the front end inclined surface of the V-belt pulley, and a gap is reserved between the second stop roller and the V-belt pulley.

[0011] Preferably, a first O-ring is provided on the contact end surface between the connecting flange and the water jacket.

[0012] Preferably, a second O-ring is provided on the contact end surface between the connecting flange and the first flange.

[0013] Preferably, a third O-ring is provided on the contact end surface between the centering ring and the socket flange of the pipe mold.

[0014] Preferably, a fourth O-ring is provided on the contact end surface between the V-belt pulley and the sealing ring.

[0015] Preferably, a baffle is installed on one side of the heat-resistant rubber sealing ring seat.

[0016] Preferably, the fire hose is fixed between the first flange and the second flange by a steel wire telescopic locking hose clamp.

[0017] Preferably, an upper sealing support elastic floating bracket is arranged at the upper end of the front surface of the connecting flange, and a lower sealing support bracket is arranged at the lower end of the front surface of the connecting flange.

[0018] Preferably, the upper sealing support elastic floating bracket includes: a gasket, a nut, a suspension stud, a spring, and a spring support;

[0019] The spring support is fixed on the connecting flange, and the suspension stud is inserted into the spring support mounting hole;

[0020] The suspension stud is provided with a spring, a pad and a nut in sequence from bottom to top; the bottom end of the suspension stud is fixed on a heat-resistant rubber sealing ring seat by welding a flange plate.

[0021] Preferably, a first sealing support bracket is provided on the left side of the front surface of the connecting flange, and a second sealing support bracket is provided on the right side.

[0022] The present invention provides a cast iron pipe centrifuge floating pipe mold rotating support device, which abandons the original design concept and adopts a new bearing-free design. The pipe mold is accurately positioned through the pipe mold supporting roller device in the water jacket (the water jacket installation position reference is consistent), and the large pulley is fixed to the socket of the pipe mold through the centering ring and the clamping ring to drive the pipe mold to rotate; the original bearing positioning structure is cancelled, and a floating type is adopted to reduce the vibration and thermal expansion of the pipe mold. Not only does it greatly improve the qualified rate of cast iron pipe production (due to the instability of the pipe mold caused by vibration, thermal expansion and other factors, the cast iron pipe wall thickness is uneven or cracks and other scrap rates appear), but also reduces the failure rate of the equipment, and the efficiency of replacing the pipe mold is higher and the maintenance cost is greatly reduced. The water-cooled cast iron pipe centrifuge equipped with the floating pipe mold rotating support device of the present invention has a floating design structure, and the overall stability of the centrifuge is greatly improved during production and operation, the service life of other parts on the machine body is also greatly improved, the wall thickness of the produced pipes is more uniform, and the scrap rate is significantly reduced; due to its bearing-free design, the difficulty of installation and adjustment is reduced, the installation and debugging time is greatly shortened, the requirements for installation and debugging maintenance personnel are lower, and the cost of purchasing spare parts and production is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a floating pipe mold rotary support device for a cast iron pipe centrifuge provided by the present invention;

[0024] Figure 2 yes Figure 1 Sectional view along line AA;

[0025] Figure 3 yes Figure 1 Sectional view along the midline BB;

[0026] Figure 4 yes Figure 1 Sectional view of the mid-CC line;

[0027] Figure 5 yes Figure 1 Sectional view along line DD.

[0028] 1. The first stop roller; 2. The first sealing support bracket; 3. The second stop roller; 4. The lower sealing support bracket; 5. The upper sealing support elastic floating hanger; 6. The steel wire telescopic locking throat clamp; 7. The first O-ring; 8. The second O-ring; 9. The water jacket; 10. The first flange; 11. The fire hose; 12. The second flange; 13. The heat-resistant rubber sealing ring seat; 14. The pipe mold; 15. The heat-resistant rubber sealing ring; 16. The sealing ring; 17. The clamping ring; 18. The third O-ring; 19. The centering ring; 20. The fourth O-ring; 21. The fifth O-ring; 22. The V-belt pulley; 23. The protective cover; 24. The gasket; 25. The nut; 26. The suspension stud; 27. The spring; 28. The spring support; 29. ​​The connecting flange; 30. The baffle; 31. The third stop roller; 32. The second sealing support bracket. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all the contents.

[0030] like Figure 1-5 As shown, the floating pipe mold rotating support device of the cast iron pipe centrifuge provided in the embodiment of the present invention includes: a connecting flange 29 and a floating clamping ring 17, a centering ring 19 and a V-belt pulley 22.

[0031] The rear surface of the connecting flange 29 is fixedly connected to the water jacket 9 of the cast iron pipe centrifuge, and the connecting flange 29 is fixedly connected to the first flange 10; a fire hose 11 is flexibly connected between the first flange 10 and the second flange 12; the second flange 12 is fixedly connected to the heat-resistant rubber sealing ring seat 13 and fixed by bolts. A fifth O-ring 21 is provided on the contact end surface between the second flange 12 and the heat-resistant rubber sealing ring seat 13 to prevent water leakage. A heat-resistant rubber sealing ring 15 is provided on the inner side of the heat-resistant rubber sealing ring seat 13. A baffle 30 is installed on one side of the heat-resistant rubber sealing ring seat 13 to prevent the heat-resistant rubber sealing ring 15 from falling off.

[0032] The connecting flange 29 serves as a carrier of the clamping ring 17, the centering ring 19, and the V-belt pulley 22. The V-belt pulley 22 is floatingly arranged at the front end of the front surface of the connecting flange 29, and the V-belt pulley 22 is not fixed to the connecting flange 29; the V-belt pulley 22 is used to be connected to the small pulley on the driving motor through a belt. The small pulley is installed on the output shaft end of the driving motor to drive the V-belt pulley 22 to rotate. The V-belt pulley 22 is fixed to the centering ring 19 by bolts; the centering ring 19 is fixed to the clamping ring 17 by bolts, and the clamping ring 17 and the centering ring 19 clamp the socket flange of the pipe mold 14. The contact end surface of the centering ring 19 and the socket flange of the pipe mold 14 is provided with a third O-ring 18 to prevent water leakage.

[0033] The rear end of the V-belt pulley 22 is fixed with a sealing ring 16 by bolts. The sealing ring 16 is in contact with the heat-resistant rubber sealing ring 15 but not fixed. The heat-resistant rubber sealing ring 15 is located between the sealing ring 16 and the heat-resistant rubber sealing ring seat 13 to prevent water leakage. The contact end surface of the V-belt pulley 22 and the sealing ring 16 is provided with a fourth O-ring 20 to prevent water leakage.

[0034] The pipe mold 14, the clamping ring 17, the centering ring 19, the V-belt pulley 22 and the sealing ring 16 are fixed together to form a whole. When the V-belt pulley 22 is driven to rotate, the centrifugal rotation of the pipe mold 14 can be driven. The whole is not fixed to the heat-resistant rubber sealing ring seat 13 and the connecting flange 29, and can float slightly during rotation.

[0035] The rear surface of the connecting flange 29 is fixedly connected to the water jacket 9 of the cast iron pipe centrifuge by bolts, and the contact end surface of the connecting flange 29 and the water jacket 9 is provided with a first O-ring 7 to prevent water leakage. The connecting flange 29 is fixedly connected to the first flange 10 by bolts; the contact end surface of the connecting flange 29 and the first flange 10 is provided with a second O-ring 8 to prevent water leakage. A fire hose 11 is fixed between the first flange 10 and the second flange 12; specifically, the fire hose 11 is fixed between the first flange 10 and the second flange 12 by a steel wire telescopic locking throat clamp 6. By providing a flexible fire hose 11, a soft connection between the first flange 10 and the second flange 12 is achieved.

[0036] The first stop roller 1 and the second stop roller 3 are arranged on the left side of the front surface of the connecting flange 29, and the third stop roller 31 is arranged on the right side. The first stop roller 1 and the third stop roller 31 extend into the V-belt pulley 22 and are close to the rear end inclined surface of the V-belt pulley 22, and a gap is reserved between the first stop roller 1 and the third stop roller 31 and the V-belt pulley 22 to ensure the axial movement of the tube mold 14; the second stop roller 3 extends into the V-belt pulley 22 and is close to the front end inclined surface of the V-belt pulley 22, and a gap is reserved between the second stop roller 3 and the V-belt pulley 22 to ensure the axial movement of the tube mold 14. The first stop roller 1, the third stop roller 31 and the second stop roller 3 are respectively installed on the connecting flange 29 through their respective stop roller seats. The purpose of such a layout is that the first stop roller 1 and the third stop roller 31 only limit the inner inclined surface of the V-belt pulley 22, and the second stop roller 3 only limits the outer inclined surface of the V-belt pulley 22. After the stop rollers are in contact, they will only rotate in a single direction to avoid a single stop roller contacting the inclined surfaces of the V-belt pulleys 22 on both sides to cause collision. The first stop roller 1 and the third stop roller 31 arranged on the inner left and right sides are used to prevent the drag force from deviating the tube mold 14 and the V-belt pulley 22 when the tube is pulled out of the tube mold 9. The protective cover 23 is installed on the connecting flange 29 to play the role of outer dust protection.

[0037] An upper sealing support elastic floating hanger 5 is provided at the upper end of the front surface of the connecting flange 29, and a lower sealing support bracket 4 is provided at the lower end of the front surface of the connecting flange 29. A first sealing support bracket 2 is provided on the left side of the front surface of the connecting flange 29, and a second sealing support bracket 32 ​​is provided on the right side. The first sealing support bracket 2, the second sealing support bracket 32, and the lower sealing support bracket 4 are used to limit the left and right movement of the heat-resistant rubber sealing ring seat 13, and a clearance margin is left in the upper and lower directions to facilitate floating adjustment.

[0038] The upper sealing support elastic floating bracket 5 includes: a pad 24, a nut 25, a suspension stud 26, a spring 27, and a spring support 28; the spring support 28 is fixed on the connecting flange 29, and the suspension stud 26 is inserted into the installation hole of the spring support 28; the suspension stud 26 is provided with a spring 27, a pad 24 and a nut 25 in sequence from bottom to top; the bottom end of the suspension stud 26 is fixed on the heat-resistant rubber sealing ring seat 13 by welding a flange plate. The upper sealing support elastic floating bracket 5 is used to balance its own weight and the weight of water here, and the balancing force is adjusted by the compression amount of the nut 25 compressing the spring 27.

[0039] The present invention is assembled in two parts during installation: first, according to the assembly sequence, the first sealing support bracket 2, the second sealing support bracket 32, the lower sealing support bracket 4, the wire telescopic locking throat clamp 6, the second O-ring 8, the first flange 10, the fire hose 11, the second flange 12, the heat-resistant rubber sealing ring seat 13, the heat-resistant rubber sealing ring 15, the fifth O-ring 21, the protective cover 23, the gasket 24, the nut 25, the suspension stud 26, the spring 27, the spring support 28, the baffle 30 and other components are installed to the connecting flange 29. Then install the first O-ring 7 and the assembled connecting flange 29 onto the water jacket 9; secondly, according to the assembly sequence, install the sealing ring 16, the clamping ring 17, the third O-ring 18, the centering ring 19, the fourth O-ring 20 and the V-belt pulley 22 onto the socket end of the pipe mold 14, and then install the assembled pipe mold 14 into the water jacket 9, and adjust the axis through the pipe mold support roller device matched with the present invention, and then adjust the compression amount of the spring 27 through the nut 25 to balance its own weight and the weight of water, and the overall installation and preliminary debugging are completed.

[0040] During the trial operation and debugging, first drive the V-belt pulley 22 without adding water to the water jacket 9, and slowly drive the pipe mold 14 from low to high speed step by step. Fine-tune the pipe mold support roller device and the spring 27 by listening to the sound, feeling the vibration, and observing the axis state to reach a stable operating state. Then fill the water jacket 9 and the pipe mold 14 with cooling water, check each seal to confirm that there is no water leakage, and then adjust to a stable operating state according to the above method. In this way, the debugging before production is completed.

[0041] The working principle of the floating pipe mold rotating support device of the cast iron pipe centrifuge of the present invention is as follows: the V-belt pulley 22 is used to be connected with the small belt pulley on the driving motor. The V-belt pulley 22 is fixed together with the centering ring 19, the clamping ring 17, and the sealing ring 16. The centering ring 19 and the clamping ring 17 clamp the pipe mold 14 to form a whole; when the small belt pulley drives the V-belt pulley 22 to rotate, the centrifugal rotation of the pipe mold 14 is driven.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that modifying the technical solutions described in the aforementioned embodiments, or replacing some or all of the technical features therein by equivalents, does not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A floating pipe mold rotating support device for a cast iron pipe centrifuge, characterized in that: include: A connecting flange (29) and a floating clamping ring (17), a centering ring (19) and a V-belt pulley (22); The rear surface of the connecting flange (29) is fixedly connected to the water jacket (9) of the cast iron pipe centrifuge, and the connecting flange (29) is fixedly connected to the first flange (10); a fire hose (11) is flexibly connected between the first flange (10) and the second flange (12); the second flange (12) is fixedly connected to the heat-resistant rubber sealing ring seat (13); a heat-resistant rubber sealing ring (15) is arranged on the inner side of the heat-resistant rubber sealing ring seat (13); The V-belt pulley (22) is fixed to the centering ring (19); the centering ring (19) is fixed to the clamping ring (17), and the clamping ring (17) and the centering ring (19) clamp the socket flange of the pipe mold (14); A sealing ring (16) is fixed at the rear end of the V-belt pulley (22); the sealing ring (16) is in contact with the heat-resistant rubber sealing ring (15) but is not fixed; A first stop roller (1) and a second stop roller (3) are arranged on the left side of the front surface of the connecting flange (29), and a third stop roller (31) is arranged on the right side; The first stop roller (1) and the third stop roller (31) extend into the V-belt pulley (22) respectively and are close to the rear end inclined surface of the V-belt pulley (22), and a gap is reserved between the first stop roller (1) and the third stop roller (31) and the V-belt pulley (22); the second stop roller (3) extends into the V-belt pulley (22) and is close to the front end inclined surface of the V-belt pulley (22), and a gap is reserved between the second stop roller (3) and the V-belt pulley (22).

2. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1 is characterized in that: The contact end surface between the connecting flange (29) and the water jacket (9) is provided with a first O-type sealing ring (7).

3. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 2 is characterized in that: A second O-ring (8) is provided on the contact end surface between the connecting flange (29) and the first flange (10).

4. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1, characterized in that: A third O-type sealing ring (18) is provided on the contact end surface between the centering ring (19) and the socket flange of the pipe mold (14).

5. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1, characterized in that: A fourth O-type sealing ring (20) is provided on the contact end surface between the V-belt pulley (22) and the sealing ring (16).

6. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1, characterized in that: A baffle (30) is installed on one side of the heat-resistant rubber sealing ring seat (13).

7. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1, characterized in that: A fire hose (11) is fixed between the first flange (10) and the second flange (12) via a steel wire telescopic locking throat clamp (6).

8. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1, characterized in that: An upper sealing support elastic floating bracket (5) is arranged at the upper end of the front surface of the connecting flange (29), and a lower sealing support bracket (4) is arranged at the lower end of the front surface of the connecting flange (29).

9. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 8, characterized in that: The upper sealing support elastic floating bracket (5) comprises: a backing plate (24), a nut (25), a suspension stud (26), a spring (27), and a spring support (28); The spring support (28) is fixed on the connecting flange (29), and the suspension stud (26) is inserted into the mounting hole of the spring support (28); The suspension stud (26) is provided with a spring (27), a gasket (24) and a nut (25) in sequence from bottom to top; the bottom end of the suspension stud (26) is fixed on the heat-resistant rubber sealing ring seat (13) by welding a flange plate.

10. The floating pipe mold rotary support device for a cast iron pipe centrifuge according to claim 1, characterized in that: A first sealing support bracket (2) is provided on the left side of the front surface of the connecting flange (29), and a second sealing support bracket (32) is provided on the right side.

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