Double-station pressing wheel system for coating lining of nodular cast iron pipe

Abstract

The invention relates to a double-station pinch roller system for nodular cast iron pipe lining coating. The pinch roller system comprises a nodular cast iron pipe. A tug group; the two tug sets are arranged side by side. The pressing wheel assembly and the connecting plate are located on the upper portion of the tug set; the two groups of pressing wheels are fixed on the connecting plate and are opposite to the upper part of the nodular cast iron pipe positioned on the tug group; the end part of the telescopic end of the linear driving mechanism is connected with the connecting plate, the linear driving mechanism drives the connecting plate to be close to or far away from the towing wheel group, and the connecting plate is utilized to combine the corresponding pressing wheels which are independently arranged originally into one group of linear driving mechanism to complete driving, so that the cooperation of the double-station lining coating pressing wheels is realized.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment for coating lining of ductile iron pipes, and in particular to a double-station pressure wheel system for coating lining of ductile iron pipes. Background Art

[0002] During the production process of ductile iron pipes with ordinary anti-corrosion requirements, it is necessary to refer to the requirements of 4.4 external coating and lining in GB / T13295-2019 and apply a layer of cement mortar on the inner wall. There are usually many methods for applying cement mortar, such as spraying and centrifugal coating. The relatively common and effective method is centrifugal coating, which is to inject a certain amount of cement mortar into the inner wall of the ductile iron pipe, drive the workpiece injected with mortar to rotate, and under the action of centrifugal force, the cement mortar is lined on the inner wall of the ductile iron pipe.

[0003] There are two types of lining mortar equipment: belt-type lining machine and roller-type lining machine. One uses a flexible belt to drive the workpiece to rotate, and the other uses a roller to drive the workpiece to rotate. The above two lining methods have their own characteristics and application scenarios. However, with the improvement of production line production efficiency and the requirements for workpiece lining quality, the lining station has become an important part of curbing the overall efficiency of the production line. In order to improve the lining efficiency, multi-station lining is usually used, that is, multiple lining equipment is lining in parallel and synchronously, so as to achieve the requirement of one lining and multiple workpieces off the line, improve the lining efficiency and even the requirements of the entire production line.

[0004] The inventor found in the study of the prior art that the current multi-station coating is mainly based on double-station and four-station coating. Each device is independently equipped with corresponding devices. The overall equipment is large and the coordination is insufficient. Especially during the operation of the pressure wheel, considering the maintenance cost, it is hoped to simplify its structure and further improve the coating quality.

[0005] Therefore, a double-station ductile iron pipe lining pressure wheel system is urgently needed. Summary of the invention

[0006] The present invention integrates the pressing wheel mechanism of the supporting wheel coating machine in the prior art, integrates the pressing wheel mechanism corresponding to the previous tugboat group separately on the basis of the double station, takes two groups (double stations) as one unit, integrates the pressing wheel system, so as to simplify the overall equipment structure, and further creatively utilizes the lever principle to share the problems such as the inadequate matching of the pressing wheels caused by various differences, so as to improve the coating quality and the overall equipment efficiency.

[0007] The technical solution adopted by the present invention is: a double-station ductile iron pipe lining pressure wheel system, comprising:

[0008] Ductile iron pipe;

[0009] Tugboat group; a device for supporting the ductile iron pipe and driving the ductile iron pipe to rotate around the axis;

[0010] The tugboat groups are arranged in two groups side by side;

[0011] The pressure wheel assembly is located on the upper part of the tugboat group, and is a device for pressing down the ductile iron pipe to prevent the ductile iron pipe from violently jumping, and includes:

[0012] A connecting plate, located on the upper part of the tugboat group;

[0013] The pressure wheels are in two groups, fixed on the connecting plate and opposite to the upper part of the ductile iron pipe located on the tugboat group;

[0014] A linear drive mechanism, wherein the telescopic end of the linear drive mechanism is connected to the connecting plate, and drives the connecting plate to move toward or away from the tugboat group.

[0015] Furthermore, it also includes:

[0016] A fixing plate, fixedly mounted on the upper side of the connecting plate;

[0017] The guide column is a columnar body that passes through the fixed plate and extends in the telescopic direction of the linear drive mechanism. One end of the guide column is fixedly connected to the connecting plate, and the side surface slides relative to the fixed plate.

[0018] Furthermore, the pressure wheel assembly also includes:

[0019] Single rods, in two groups, are located on the lower side of the connecting plate, and one end is hinged to the connecting plate;

[0020] The elastic components are divided into two groups, each group is located between the single rod and the connecting plate, and is connected to the single rod and the connecting plate respectively;

[0021] Each group of the pressing wheels is arranged on a group of the single rods, and is located between the connection position between the single rods and the elastic component, and the hinge position between the single rods and the connecting plate.

[0022] Furthermore, the pressure wheel assembly also includes:

[0023] The raised portion is fixedly connected to the lower portion of the connecting plate and is oriented toward the tugboat group;

[0024] A connecting rod, the middle portion of which is hinged to the raised portion;

[0025] The elastic components are divided into two groups, each group is located between the two ends of the connecting rod and the connecting plate, and is connected to the connecting rod and the connecting plate respectively;

[0026] The pressure wheels are arranged on both sides of the hinged position between the connecting rod and the protruding portion, and each group of the pressure wheels is located between the hinged position between the connecting rod and the protruding portion and the connection position between the connecting rod and the elastic component.

[0027] Furthermore, the elastic component is a spring.

[0028] Furthermore, the connecting rod is in a convex shape, and the convex protrusion is hinged to the raised portion.

[0029] The beneficial effects of the present invention compared with the prior art are as follows: 1. The connecting plate is used to combine the corresponding pressing wheels that were originally set separately into a group of linear drive mechanisms to complete the drive, thereby realizing the coordination of the double-station coating pressing wheels; 2. The fixed plate and the guide column are used to achieve the position stability of the pressing wheel assembly, thereby avoiding the influence of the workpiece jumping and vibration on the equipment during the coating process; 3. The single rod and the elastic component are used to improve the adaptability of the pressing wheel to the workpiece, thereby avoiding the problems of insufficient downward pressure stroke or over-pressure locking caused by factors such as casting tolerance or tug wheel wear, and the elastic component and the single rod are hinged to reduce the workpiece jumping process. It reduces the impact on the equipment and also reduces the amplitude of the workpiece's jump, so as to avoid the loosening or falling off of the cement mortar caused by vibration and excessive jump during the lining process; 4. The connecting rod is used to solve the problem of uneven lining quality when the two workpieces in the double station are of different sizes or the wear of the same-sized supporting wheels is different, the top surface positions are not on the same height plane, and the linear drive mechanism has the same stroke. The elastic component and the connecting rod are used to form a seesaw-like lever structure between the two sets of pressure wheels. When one side is over-pressed and the other side has a larger gap, the connecting rod structure can be used to share the gap and improve the lining quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a double-station ductile iron pipe lining pressure wheel system according to a specific embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the guide column structure of a double-station ductile iron pipe lining pressure wheel system according to a specific embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of a single-rod structure of a double-station ductile iron pipe lining pressure wheel system according to a specific embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the connecting rod structure of a double-station ductile iron pipe lining pressure wheel system according to a specific embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of a convex-shaped structure of a connecting rod of a double-station ductile iron pipe lining pressure wheel system according to a specific embodiment of the present invention;

[0035] Figure 6 It is a schematic diagram of the connecting rod deflection structure when the workpiece height difference occurs in the double-station ductile iron pipe lining pressure wheel system according to a specific embodiment of the present invention;

[0036] Figure 7It is a front view of the engineering equipment of the double-station ductile iron pipe lining pressure wheel system according to the specific embodiment of the present invention (the relationship between the guide column and the fixed plate is a cross section);

[0037] The markings are: 100-ductile iron pipe;

[0038] 200-tugboat group;

[0039] 300-pressing wheel assembly; 310-connecting plate; 320-fixing plate; 330-guide column; 340-pressing wheel; 350-single rod; 360-elastic component; 370-protrusion; 380-connecting rod;

[0040] 400-Linear drive mechanism. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] In order to overcome the problem that each device in the prior art is independently equipped with a corresponding device, the overall equipment is large and the coordination is insufficient. Especially during the operation of the pressure wheel, considering the maintenance cost, it is hoped to simplify its structure and further improve the coating quality. The inventor integrates the pressure wheel mechanism of the supporting wheel coating machine in the prior art, integrates the pressure wheel mechanism corresponding to the previous tugboat group on the basis of the double station, and integrates the pressure wheel system with two groups (double stations) as a unit to achieve the purpose of simplifying the overall equipment structure, and further creatively utilizes the lever principle to share the problems of poor pressure wheel coordination caused by various differences, thereby improving the coating quality and overall equipment efficiency.

[0043] See also Figures 1 to 7 , the technical solution adopted by the present invention is:

[0044] See also Figure 1 , a double-station ductile iron pipe lining pressure wheel system, comprising;

[0045] Ductile iron pipe 100;

[0046] The tugboat group 200 is a device for supporting the ductile iron pipe 100 and driving the ductile iron pipe 100 to rotate around the axis;

[0047] The tugboat groups 200 are arranged in two groups side by side;

[0048] The pressing wheel assembly 300 is located on the upper part of the tugboat assembly 200 and is used to press down the ductile iron pipe 100 to prevent the ductile iron pipe 100 from violently jumping, and includes:

[0049] The connecting plate 310 is located on the upper part of the tugboat group 200. In the present invention, the function of the connecting plate 310 is to integrate the tugboat group together, drive the tugboat group as a whole by the linear drive mechanism 400, and reduce the overall structure of the equipment.

[0050] The pressure wheels 340 are divided into two groups and fixed on the connecting plate 310, opposite to the upper part of the ductile iron pipe 100 located on the tugboat group 200. It should be noted that in daily use, the pressure wheels 340 have two effects. One is to prevent the ductile iron pipe 100 from vibrating violently during the coating and lining process. The other is that the small vibration between the pressure wheels 340 and the workpiece during the small vibration process can improve the coating and lining quality.

[0051] The linear drive mechanism 400 has a telescopic end connected to the connecting plate 310 to drive the connecting plate 310 to move toward or away from the tugboat group 200 .

[0052] In this embodiment, the inventor creatively combines the pressure wheels 340 that were originally separated by the connecting plate 310 to achieve the purpose of two tugboat groups 200 working in coordination with one movement.

[0053] In some embodiments, see Figure 2 , also includes:

[0054] A fixing plate 320 is fixedly mounted on the upper side of the connecting plate 310;

[0055] The guide column 330 is a columnar body that passes through the fixed plate 320 to extend and retract the linear drive mechanism 400 . One end of the guide column 330 is fixedly connected to the connecting plate 310 , and the side surface slides relative to the fixed plate 320 .

[0056] In this embodiment, the guide column 330 can also be fixed at the non-telescopic end by the fixing plate 320. The guide column 330 and the fixing plate 320 are used to ensure the stability of the driving track. Please refer to 2 at the same time. At this time, the linear drive mechanism 400 can be relatively fixedly connected with the connecting plate 310 by means of the guide column 330, but the actual connection method is hinged, which more effectively protects the linear drive mechanism 400.

[0057] In some embodiments, see Figure 3 , the pressure wheel assembly 300 further includes:

[0058] Single rods 350, in two groups, are located at the lower side of the connecting plate 310, and one end is hinged to the connecting plate 310;

[0059] The elastic components 360 are divided into two groups, each group is located between the single rod 350 and the connecting plate 310, and is connected to the single rod 350 and the connecting plate 310 respectively;

[0060] Each group of the pressing wheels 340 is disposed on a group of the single rods 350 , and is located between the connection position between the single rods 350 and the elastic component 360 , and the hinge position between the single rods 350 and the connecting plate 310 .

[0061] In this embodiment, a single rod and an elastic component are used to improve the adaptability of the pressure wheel to the workpiece, so as to avoid problems such as insufficient downward pressure stroke or overpressure locking caused by factors such as casting tolerance or tug wear, and the elastic component and the single rod are hinged to reduce the impact of the workpiece on the equipment during the jumping process, and also reduce the jumping amplitude of the workpiece, so as to avoid the loosening or falling of cement mortar due to vibration and excessive jumping amplitude during the coating process. However, there is still a defect in this embodiment, that is, since the stroke of the linear drive mechanism 400 has the same effect on the two sets of pressure wheels 340, if there is a large workpiece error or the support wheel is worn, the stroke of the elastic component 360 cannot meet the requirements, and locking or other situations that affect the coating quality may occur.

[0062] In some other embodiments, see Figure 4 In order to overcome the above problems, the inventors propose that the pressure wheel assembly 300 further comprises:

[0063] The protrusion 370 is fixedly connected to the lower part of the connecting plate 310 and is protruded toward the tugboat group 200;

[0064] A connecting rod 380, wherein the middle portion of the connecting rod 380 is hinged to the protruding portion 370;

[0065] The elastic components 360 are divided into two groups, each group is located between the two ends of the connecting rod 380 and the connecting plate 310, and is connected to the connecting rod 380 and the connecting plate 310 respectively;

[0066] The pressure wheels 340 are arranged on both sides of the hinged position between the connecting rod 380 and the protrusion 370 , and each group of the pressure wheels 340 is located between the hinged position between the connecting rod 380 and the protrusion 370 and the connection position between the connecting rod 380 and the elastic component 360 .

[0067] In this embodiment, the seesaw structure of the connecting rod 380 is used to automatically adjust the contact strength between the two groups of pressure wheels 340 and the workpiece caused by the error. When there is a large gap on one side, the other side will be in contact first, which will lift this side and press the other side down to reduce the gap. By using the principle of this lever, the error is automatically shared. Of course, in this application, the position where the middle part of the connecting rod 380 is hinged on the protrusion 370 is centered, because the spacing of the tug group 200 is relatively centered. However, if the distance of the tug group 200 relative to the position of the upper mechanism is not evenly divided, the position of the hinge point can be adjusted to achieve the purpose of sharing the gap, achieve uniform contact, and improve the coating quality.

[0068] In some of the above embodiments, the elastic component 360 is a spring. Figure 7 , the elastic component 360 is a disc spring. Of course, in order to ensure the accuracy of the elastic force feedback of the elastic component 360, in some embodiments, a bolt or other columnar structure is also provided in the middle of the elastic component 360, one end of which is fixed to the connecting plate 310 or the connecting rod 380, the single rod 350, and the other end passes through the relative structure, and the elastic component 360 is sleeved on the outside of the columnar structure, and the columnar structure is used to achieve the functions of guidance and limiting.

[0069] Preferably, in some embodiments, see Figure 5 The connecting rod 380 is a convex shape, and the convex protrusion is hinged with the protrusion 370. In this embodiment, the convex shape is used to increase the stroke of the elastic component 360 and reduce the influence of the overpressure of the linear drive mechanism 400 on the workpiece.

[0070] During specific use: the ductile iron pipe 100 enters the tugboat group 200 by any transportation method, usually in a stepping manner, the linear drive mechanism 400 drives the connecting plate 310 to move toward the tugboat group 200, the pressure wheel assembly 300 contacts the ductile iron pipe 100, the tugboat group 200 rotates, driving the ductile iron pipe 100 to rotate, and the lining work is completed.

[0071] Compared with the prior art, the present invention has the following beneficial effects: the connecting plate is used to combine the corresponding pressing wheels that were originally set separately into a group of linear drive mechanisms to complete the drive, so as to realize the coordination of the double-station coating pressing wheels; the fixing plate and the guide column are used to realize the position stability of the pressing wheel assembly, so as to avoid the influence of the workpiece jumping and vibration on the equipment during the coating process; the single rod and the elastic component are used to improve the adaptability of the pressing wheel to the workpiece, so as to avoid the problems such as insufficient downward pressure stroke or over-pressure locking of the workpiece caused by factors such as casting tolerance or tug wear, and the elastic component and the single rod are hinged to reduce the influence of the workpiece jumping on the equipment, and also reduce the jumping amplitude of the workpiece, so as to avoid the loosening or falling of the cement mortar caused by vibration and excessive jumping amplitude during the coating process; the connecting rod is used to realize the problem of uneven coating quality when the top surface positions of the two workpieces in the double station are not on the same height plane when the sizes of the two workpieces are different or the wear of the same size of the supporting wheels is different, and the elastic component and the connecting rod are used to form a seesaw-like lever structure between the two groups of pressing wheels, please refer to Figure 6 When one side is over-pressured and the other side has a large gap, the connecting rod structure can be used to distribute the gap and improve the coating quality.

[0072] 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 double-station ductile iron pipe lining pressure wheel system, characterized in that: include; Ductile iron pipe (100); A tugboat group (200); a device for supporting the ductile iron pipe (100) and driving the ductile iron pipe (100) to rotate around the axis; The tugboat groups (200) are arranged in two groups side by side; The pressure wheel assembly (300) is located on the upper part of the tugboat group (200), and is a device for pressing down the ductile iron pipe (100) to prevent the ductile iron pipe (100) from violently jumping, and comprises: A connecting plate (310) located on the upper part of the tugboat group (200); The pressure wheels (340) are in two groups, fixed on the connecting plate (310) and opposite to the upper part of the ductile iron pipe (100) located on the tugboat group (200); A linear drive mechanism (400), wherein the telescopic end of the linear drive mechanism (400) is connected to the connecting plate (310) to drive the connecting plate (310) to move closer to or farther from the tugboat group (200).

2. The double-station ductile iron pipe lining pressure wheel system according to claim 1 is characterized in that: Also includes: A fixing plate (320) fixedly mounted on the upper side of the connecting plate (310); The guide column (330) is a columnar body extending along the telescopic direction of the linear drive mechanism (400) and passing through the fixed plate (320). One end of the guide column (330) is fixedly connected to the connecting plate (310), and the side surface is relatively slidably connected to the fixed plate (320).

3. The double-station ductile iron pipe lining pressure wheel system according to claim 1 is characterized in that: The pressure wheel assembly (300) further comprises: A single rod (350), which is divided into two groups and is located at the lower side of the connecting plate (310), and one end of the single rod (350) is hinged to the connecting plate (310); The elastic components (360) are divided into two groups, each group is located between the single rod (350) and the connecting plate (310), and is respectively connected to the single rod (350) and the connecting plate (310); Each group of the pressing wheels (340) is arranged on a group of the single rods (350), and is located between the connection position between the single rods (350) and the elastic component (360), and the hinge position between the single rods (350) and the connecting plate (310).

4. The double-station ductile iron pipe lining pressure wheel system according to claim 1 is characterized in that: The pressure wheel assembly (300) further comprises: The protrusion (370) is fixedly connected to the lower part of the connecting plate (310) and is protruded toward the tugboat group (200); A connecting rod (380), wherein the middle portion of the connecting rod (380) is connected to the raised portion (370); The elastic components (360) are divided into two groups, each group is located between the two ends of the connecting rod (380) and the connecting plate (310), and is respectively connected to the connecting rod (380) and the connecting plate (310); The pressure wheels (340) are arranged on both sides of the hinged position between the connecting rod (380) and the protruding portion (370), and each group of the pressure wheels (340) is located between the hinged position between the connecting rod (380) and the protruding portion (370) and the connection position between the connecting rod (380) and the elastic component (360).

5. The double-station ductile iron pipe lining pressure wheel system according to one of claims 3 or 4, characterized in that: The elastic component (360) is a spring.

6. The double-station ductile iron pipe lining pressure wheel system according to claim 4 is characterized in that: The connecting rod (380) is in a convex shape, and the convex protrusion is hinged to the protruding portion (370).

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