Swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment

Abstract

The swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment of the present invention comprises: a driving device, the driving device comprises: a driving wheel, a base, a driven wheel, a driving belt, a swing arm and an adjusting device, the driving wheel is mounted on the base, and swing arms are respectively mounted on the bases on both sides of the driving wheel symmetrically, one end of the swing arm is hinged on the base, and a driven wheel is mounted on the other end of the swing arm, and an adjusting device is respectively mounted on the bases on both sides of the driving wheel, one end of the adjusting device is mounted on the base, and the other end is mounted on the pushing swing arm, so that the swing arm rotates around one end thereof, a driving belt is mounted between the driving wheel and two symmetrical driven wheels, the driving wheel drives the driving belt to move, and a workpiece is placed on the driving belt between the two symmetrical driven wheels. The swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment of the present invention has a simple structural layout, a variety of ways for workpieces to enter, reliable transmission efficiency, and outstanding mixed flow operation capability.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal molding of cement mortar lining of belt-driven metal pipes, in particular to swing arm type centrifugal molding equipment of cement mortar lining of belt-driven metal pipes. Background Art

[0002] At present, ductile iron pipes are widely used in medium and low pressure pipe networks, mainly in gas transmission, water supply, drainage and other aspects. Ductile iron pipes have many advantages such as safe and reliable operation, low breakage rate, convenient and fast construction and maintenance, excellent anti-corrosion performance, and are suitable for trenchless construction. After the casting of ductile iron pipes is completed, centrifugal lining must be carried out inside the cast iron pipe, that is, the lining layer is formed by centrifugal lining of cement mortar on the inner wall of the cast pipe to complete the entire casting process. Therefore, the quality of the centrifugal lining cement mortar lining of the inner wall of the cast pipe directly affects the quality of the cast pipe, and the cement lining coating machine used in the lining of the cast pipe becomes a key equipment.

[0003] The traditional centrifugal lining process usually adopts a tug-type structure. Through two linked driving wheels, the workpiece is driven to rotate at a certain speed under the condition that the driving wheel and the workpiece are set at an angle to complete the centrifugal lining work (Centrifugal Ductile Iron Pipe Process and Equipment, edited by Fan Yingjun, China Science and Technology Press, ISBN 7-5046-2998-7, Figure 9-22). However, the traditional tug-type lining process is unreliable in working condition. After the centrifugal casting workpiece is formed, a certain degree of ovality will inevitably be produced. The workpiece will vibrate violently on the tug as the speed increases, affecting the final cement lining quality. At the same time, with the vibration, the transmission efficiency of the tug to the workpiece will be reduced, and the workpiece cannot obtain a higher centrifugal lining speed. In order to avoid the vibration of the workpiece, a clamping mechanism needs to be arranged on the upper part of the entire equipment. The entire equipment occupies a large space and has a complex structure. When workpieces of different nominal diameters enter, the spacing between the two driving wheels in the tug must be readjusted to adapt to the angle between the workpiece and the tug, which is time-consuming and labor-intensive.

[0004] Prior art JP2002240027A, published on August 28, 2002, describes a centrifugal lining method that uses a belt-shaped support belt to solidify the solidified liquid inside a steel pipe pile. Based on this technology, after 2010, companies in related fields in my country began to develop support belt-type centrifugal lining devices for use in the field of lining inside metal pipes. A representative example is the application No. 201610148326.8, which has been authorized by Shenyang Yat Heavy Equipment Manufacturing Co., Ltd. A medium and large diameter ductile iron pipe belt cement lining machine, which discloses: "A high-strength wear-resistant driving belt is sleeved on the four passive wheels of one group of lining machine units to form a vertical plane. The four passive wheels of another group of lining machine units have raised rims on both sides, and the passive wheels with raised rims on both sides are respectively sleeved with a high-strength wear-resistant driving belt on the protrusions. The inner diameter of the inflatable intermediate retaining ring is equal to the outer diameter of the ductile iron pipe. After the ductile iron pipe is sleeved and fixed with the inflatable intermediate retaining ring, it is placed on the high-strength wear-resistant conveyor belt between the passive wheels A of the two sets of lining machine units. The inflatable intermediate retaining ring is just sandwiched between the two high-strength wear-resistant driving belts sleeved by the passive wheels with raised wheel rims on both sides. In the scheme, the belt-carrying type is used to complete the centrifugal forming of the cement mortar lining. However, the method of workpiece entering and exiting the workstation is complicated. Before centrifugation, a flexible ring body needs to be mounted on the workpiece to prevent the workpiece from axial movement. For workpieces with a large nominal diameter of the lining, a too long driving belt will cause the workpiece to swing laterally.

[0005] With further research, two technical solutions have been disclosed in the prior art: Application No. 201822185237.8 and Application No. 201910856714.5. Both of the technical solutions use swing arms to adjust the mixed flow operation of workpieces with different nominal diameters. However, the above solutions have complex design layouts, especially in the 201822185237.8 document, which requires adjusting the "limit pin" to meet the requirements of the mixed flow operation of workpieces with different nominal diameters.

[0006] None of the technical solutions disclosed above state that the purpose of mixed loading of workpieces with different nominal diameters in centrifugal operation can be achieved simply by setting a swing arm. That is, it is common knowledge among those skilled in the art that the cooperation of a swing arm and a limit pin or other device is required to achieve centrifugal lining operation of workpieces with different nominal diameters. At the same time, the prior art does not disclose the optimization problem of the position relationship of the driving wheel for the overall equipment and the wrap angle problem of the workpiece and the driving belt during the centrifugal process, nor does it solve the problem of shortening the length of the production line and centrally arranging different workstations. Summary of the invention

[0007] The invention purpose of this application is to overcome the shortcomings of the prior art and to provide a centrifugal forming equipment for cement mortar lining of metal pipes which has a reasonable structural design, a simple overall equipment layout, can meet the mixed flow operation of workpieces with different nominal diameters, and the driving belt does not need to be frequently replaced with model changes.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention discloses a swing arm type belt-driven centrifugal forming equipment for cement mortar lining of metal pipe, comprising: a driving device, wherein the driving device comprises: a driving wheel, a base, a driven wheel, a driving belt, a swing arm and an adjusting device, wherein: the driving wheel is mounted on the base, and swing arms are respectively mounted on the bases on both sides of the driving wheel symmetrically, one end of the swing arm is hinged on the base, and a driven wheel is mounted on the other end of the swing arm, and an adjusting device is respectively mounted on the bases on both sides of the driving wheel, one end of the adjusting device is mounted on the base, and the other end is mounted on the pushing swing arm, so that the swing arm rotates around one end thereof, a driving belt is mounted between the driving wheel and two symmetrical driven wheels, the driving wheel drives the driving belt to move, and a workpiece is placed on the driving belt between the two symmetrical driven wheels.

[0010] The present invention provides a swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment, wherein: the hinge point of the swing arm on the base is arranged between the axis center of the driven wheel and the axis center of the driving wheel on the same side as the swing arm, projected on the base.

[0011] The present invention discloses a swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment, wherein: it also includes: a vibrating device, which is installed on one side or both sides of the swing arm and moves in coordination with the swing arm. During the centrifugal process of the workpiece, the vibrating device vibrates the workpiece.

[0012] The present invention discloses a swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment, wherein: the vibrating device comprises: a fixed seat, a vibrating wheel, a vibrating adjustment device and a vibrating arm, the fixed seat extends from one side of the swing arm, one end of the vibrating arm is hinged on the swing arm, and the other end is provided with a vibrating wheel, the vibrating adjustment device is installed on the fixed seat, and the other end of the vibrating adjustment device is connected to the vibrating arm, and there are several protrusions on the vibrating wheel. During the rotation of the workpiece, the above-mentioned protrusions enable the workpiece to complete the vibration work.

[0013] The present invention discloses a swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment, wherein: the vibrating device comprises: a fixed seat, a vibrating wheel and a vibrating adjustment device, one end of the vibrating adjustment device is installed on the fixed seat, and the other end is provided with a vibrating wheel, the vibrating adjustment device pushes the vibrating wheel, and the vibrating wheel is provided with a plurality of protrusions, and during the rotation of the workpiece, the above-mentioned protrusions cause the workpiece to vibrate.

[0014] The present invention discloses a swing arm type belt driven metal tube cement mortar lining centrifugal forming equipment, wherein: the vibration adjustment device is an air bag, an oil cylinder, and a gas cylinder.

[0015] The invention discloses a swing arm type belt driven centrifugal forming device for cement mortar lining of metal pipe, wherein: the driving wheel is mounted on a base through supports on both sides thereof, and the driving wheel is driven by a driver.

[0016] The present invention discloses a swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment, wherein: the adjusting device is a hydraulic cylinder or rod bodies of different lengths, and the position of the swing arm is adjusted by replacing the rod body; or a plurality of through pins are opened on a rod body, and the swing arm is fixed at different positions by the above-mentioned through pins.

[0017] The invention discloses a swing arm type belt driven centrifugal forming device for cement mortar lining of metal pipe, wherein at least two driving devices are arranged in the axial direction of the workpiece and are placed parallel to each other.

[0018] The present invention discloses a swing arm type belt driven metal tube cement mortar lining centrifugal forming equipment, wherein: the driving wheels of the driving device are connected via a coupling.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The structure layout is simple. Compared with the existing technology, there is no pressure wheel. The centrifugal equipment allows the workpiece to enter the workstation in a variety of ways. The driving wheel is placed at the bottom of the frame to improve the transmission efficiency of the driving wheel, increase the drive belt wrap angle, and reduce the slippage of the conveyor belt.

[0021] 2. During the experiment of the equipment of the present invention, it was found that workpieces with different nominal diameters from DN200 to DN1000 and DN1000-DN3500 do not need to change the specifications of the drive belt in the above two intervals, which provides an excellent solution for the centrifugal operation of workpieces with different nominal diameters and meets the automation standards required for modern production.

[0022] 3. By adjusting the position of the swing arm, the lowest points of workpieces with different nominal diameters can be set on the same horizontal plane, or the horizontal positions of the lowest points of workpieces with different nominal diameters can be changed within a smaller range, so that the material distribution station, centrifugal station or plugging station can be set synchronously, thereby improving production efficiency and shortening the length of the entire production line.

[0023] 4. The vibrating device is set on the swing arm. When workpieces with different nominal diameters enter the work station, the position of the vibrating device changes accordingly while adjusting the swing arm, shortening the stroke length between the vibrating device and workpieces with different nominal diameters, making it easier for the vibrating device to vibrate the cement lining of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a forward schematic diagram of the centrifugal forming equipment for cement mortar lining of metal pipes of the present invention;

[0025] Figure 2 for Figure 1 Schematic side view of

[0026] Figure 3(a) shows Figure 1 A schematic diagram of a centrifugal forming device for cement mortar lining of a metal pipe of the present invention with a workpiece of large nominal diameter installed therein;

[0027] Figure 3(b) shows Figure 1 A schematic diagram of a centrifugal forming device for cement mortar lining of a metal pipe of the present invention with a workpiece of small nominal diameter installed therein is shown in a forward direction.

[0028] exist Figure 1-2 In the figure: number 1 is the driving wheel; number 2 is the base; number 3 is the driven wheel; number 4 is the driving belt; number 5 is the swing arm; number 6 is the adjusting device; number 7 is the support; number 8 is the workpiece; number 9 is the fixed seat; number 10 is the vibrating wheel; number 11 is the vibrating adjusting device; number 12 is the vibrating arm. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0030] like Figure 1 and Figure 2As shown, the swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment of the present invention comprises: a driving device, which comprises: a driving wheel 1, a base 2, a driven wheel 3, a driving belt 4, a swing arm 5 and an adjusting device 6. The driving wheel 1 is mounted on the base 2, and swing arms 5 are respectively mounted on the base 2 on both sides of the driving wheel 1. One end of the swing arm 5 is hinged on the base 2, and the hinge point of the swing arm 5 on the base 2 is set between the axis of the driven wheel 3 on the same side as the above-mentioned swing arm 5 and the projection of the axis of the driving wheel 1 on the base 2. The other end of the swing arm 5 is equipped with a driven wheel 3, and an adjusting device 6 is respectively mounted on the base 2 on both sides of the driving wheel 1. One end of the adjusting device 6 is mounted on the base 2, and the other end is mounted on the pushing swing arm 5, so that the swing arm 5 rotates around one end thereof. The adjusting device 6 is a hydraulic cylinder or a rod body of different lengths, and the position of the swing arm 5 is adjusted by replacing the rod body; or a plurality of through pins are opened on a rod body, and the swing arm 5 is fixed at different positions by the above-mentioned through pins. A driving belt 4 is installed between the driving wheel 1 and two symmetrical driven wheels 3. The driving wheel 1 drives the driving belt 4 to move. A workpiece 8 is placed on the driving belt 4 between the two symmetrical driven wheels 3. At least two driving devices are installed in the axial direction of the workpiece 8, and they are placed parallel to each other. The driving wheel 1 is installed on the base 2 through the supports 7 on both sides thereof. The driving wheel 1 is driven by a driver, and the driving wheels 1 of the driving devices are connected through a coupling.

[0031] The swing arm type belt-driven metal tube cement mortar lining centrifugal forming equipment of the present invention also includes: a rapping device, which is installed on one side or both sides of the swing arm 5, and moves in coordination with the swing arm. During the centrifugal process of the workpiece 8, the rapping device vibrates the workpiece 8. A rapping device includes: a fixed seat 9, a rapping wheel 10, a rapping adjustment device 11 and a vibrating arm 12. The fixed seat 9 extends from one side of the swing arm 5. One end of the vibrating arm 12 is hinged on the swing arm 5, and the other end is provided with a rapping wheel 10. The rapping adjustment device 11 is installed on the fixed seat 9, and the other end of the rapping adjustment device 11 is connected to the vibrating arm 12. There are several protrusions on the rapping wheel 10. During the rotation of the workpiece 8, the above-mentioned protrusions enable the workpiece 8 to complete the vibrating work. Another rapping device includes: a fixed seat 9, a rapping wheel 10 and a rapping adjustment device 11, one end of the rapping adjustment device 11 is mounted on the fixed seat 9, and the other end is provided with the rapping wheel 10, the rapping adjustment device 11 pushes the rapping wheel 10 so that the rapping wheel 10 is attached to the workpiece 8, and the rapping wheel 10 has a plurality of protrusions, and during the rotation of the workpiece 8, the protrusions cause the workpiece 8 to vibrate. The rapping adjustment device 11 is an air bag, an oil cylinder, or an air cylinder.

[0032] The driven wheel 3 and the driving wheel 1 of the present invention are arranged in an inverted triangle. By adjusting the swing arm 5, the lowest point tangent of workpieces with different nominal diameters can be kept on the same horizontal plane, or the lowest point position of workpieces with different nominal diameters can float up and down within a very small range. There is no need to install a lifting device on the material distribution station to meet the needs of workpieces with different nominal diameters, thereby improving the efficiency of mixed flow operations. Especially in the production process of large pipe diameters, merging two stations can effectively reduce the space occupied by equipment and optimize the equipment layout structure. At the same time, compared with the prior art, there is no upper equipment occupying space, and the workpiece can enter the corresponding centrifugal station through various means such as an overhead crane, magnetic hoisting or a stepping mechanism to complete the centrifugal work.

[0033] The centrifugal station described in the present invention may also include a plugging station, and the upper and lower plugging stations, the material distribution station, and the centrifugal station are set synchronously, or the above three stations can be combined in pairs to optimize the layout of the traditional station assembly line operation in the prior art, reduce the assembly line steps, and shorten the impact time of workpiece transportation between stations, especially in the centrifugal operation of large workpieces.

[0034] A rapping device is provided on the swing arm 5. When the position of the swing arm 5 is adjusted by the adjusting device 6, the rapping device will also change with the position of the swing arm 5, thereby shortening the stroke required for the rapping device to contact the workpiece.

[0035] The rapping device is provided with an adjusting device, which can be adjusted according to the rapping intensity and stroke setting. The rapping adjusting device can be a structure with an adjusting function such as an air bag or a cylinder.

[0036] Test statistics of swing arm 5 and workpiece 8 positions

[0037]

[0038] Taking the nominal diameter DN1100-DN3000 as an example, under the working conditions of workpieces of different specifications, among the values ​​of swing arm, workpiece outer diameter, driving wheel diameter, driven wheel diameter, workpiece wrap angle, driven wheel wrap angle, total length of driving belt, distance between the lowest point of workpiece and the axis of driving wheel, and horizontal gap between driven wheel and workpiece, the total length of driving belt and the distance between the lowest point of workpiece and the axis of driving wheel can be adjusted to constant values. It is proved that within the range of DN1100-DN3000, the driving belt does not need to be replaced. As shown in Figure 3, the distance between the lowest point of the workpiece and the axis of driving wheel is fixed or can float up and down in a small range, which meets the requirement that the material distribution station can be set at the same height without the need to install a lifting adjustment device.

[0039] At the same time, the drive belt wrap angle of the driven wheel 3 increases with the increase of the nominal diameter, and the transmission efficiency is gradually improved. The workpiece wrap angle will gradually decrease with the adjustment of the position of the swing arm 5, but its variation range is between 142.9 degrees and 162.3 degrees. The minimum workpiece wrap angle requirement of the swing arm type belt drive metal tube cement mortar lining centrifugal forming equipment is greater than 90 degrees to achieve a good transmission effect. In order to adapt to the position of the workpiece in the swing arm type belt drive metal tube cement mortar lining centrifugal forming equipment, the swing arm can be set to a V-shaped structure to meet the gap between the workpiece lining and the swing arm during the centrifugal forming process, so as to avoid the influence of the inevitable swing of the workpiece on the swing arm during the centrifugal forming process.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment, comprising: A driving device, the driving device comprising: a driving wheel (1), a base (2), a driven wheel (3), a driving belt (4), a swing arm (5) and an adjusting device (6), characterized in that: the driving wheel (1) is mounted on the base (2), the base (2) on both sides of the driving wheel (1) is respectively equipped with a swing arm (5), one end of the swing arm (5) is hinged on the base (2), the other end of the swing arm (5) is equipped with a driven wheel (3), the base (2) on both sides of the driving wheel (1) is respectively equipped with an adjusting device (6), and the adjusting device (6) One end of the swing arm (5) is mounted on the base (2), and the other end is mounted on the pushing swing arm (5), so that the swing arm (5) rotates around one end thereof, a driving belt (4) is installed between the driving wheel (1) and two symmetrical driven wheels (3), the driving wheel (1) drives the driving belt (4) to move, a workpiece (8) is placed on the driving belt (4) between the two symmetrical driven wheels (3), and a hinge point of the swing arm (5) on the base (2) is arranged between the axis of the driven wheel (3) on the same side as the swing arm (5) and the projection of the axis of the driving wheel (1) on the base (2).

2. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 1, characterized in that: It also includes a rapping device, which is mounted on one side or both sides of the swing arm (5) and moves in coordination with the swing arm (5). During the centrifugal process of the workpiece (8), the rapping device vibrates the workpiece (8).

3. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 2, characterized in that: The rapping device comprises: a fixed seat (9), a rapping wheel (10), a rapping adjustment device (11) and a vibrating arm (12); the fixed seat (9) extends from one side of a swing arm (5); one end of the vibrating arm (12) is hinged on the swing arm (5); the other end is provided with a rapping wheel (10); the rapping adjustment device (11) is mounted on the fixed seat (9); the other end of the rapping adjustment device (11) is connected to the vibrating arm (12); a plurality of protrusions are provided on the rapping wheel (10); during the rotation of the workpiece (8), the protrusions enable the workpiece (8) to complete the vibrating operation.

4. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 2, characterized in that: The rapping device comprises: a fixed seat (9), a rapping wheel (10) and a rapping adjustment device (11); one end of the rapping adjustment device (11) is mounted on the fixed seat (9), and the other end is provided with the rapping wheel (10); the rapping adjustment device (11) drives the rapping wheel (10); a plurality of protrusions are provided on the rapping wheel (10); during the rotation of the workpiece (8), the protrusions cause the workpiece (8) to vibrate.

5. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 3 or 4, characterized in that: The rapping adjustment device (11) is an air bag, an oil cylinder, or an air cylinder.

6. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 5, characterized in that: The driving wheel (1) is mounted on the base (2) via supports (7) on both sides thereof, and the driving wheel (1) is driven by a driver.

7. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in any one of claims 1, 2, 3, 4 and 6, characterized in that: The adjusting device (6) is a hydraulic cylinder or a rod body of different lengths, and the position of the swing arm (5) is adjusted by replacing the rod body; or a plurality of through pins are provided on a rod body, and the swing arm (5) is fixed at different positions by the through pins.

8. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 7, characterized in that: At least two driving devices are arranged in the axial direction of the workpiece (8) and are placed parallel to each other.

9. The swing arm type belt driven metal pipe cement mortar lining centrifugal forming equipment as claimed in claim 8, characterized in that: The driving wheel (1) of the driving device is connected via a coupling.

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