Municipal manhole cover grinding removal device and removal method

Abstract

The present invention relates to the technical field of municipal manhole cover removal, and specifically discloses a municipal manhole cover grinding removal device and removal method. The device includes a support frame, the support frame includes a support column and a top plate; a plurality of support columns are provided on the lower outer side of the top plate; a movable groove is provided on the inner side of the support column; a lead support rod is longitudinally provided in the movable groove; a lifting platform is also provided, the outer side of the lifting platform is provided with a movable protrusion corresponding to the movable groove; the movable protrusion is provided with a lead rod socket corresponding to the lead support rod; the lead support rod is provided through the lead rod socket; a telescopic rod is provided on the lifting platform; a circular guide rail is provided on the lower side of the lifting platform; a slider is provided on the circular guide rail; a grinding motor is provided on the lower side of the slider; the output shaft of the grinding motor is detachably connected to a grinding head. The present invention has the advantages of simple operation, high removal efficiency, almost no damage to the road surface, and significantly reduced operation cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal manhole cover removal, and in particular to a municipal manhole cover grinding removal device and a removal method. Background Art

[0002] Municipal manhole covers are prefabricated parts, and can be divided into ductile iron manhole covers, composite manhole covers, cement manhole covers, etc. according to the composition of the manhole covers. Structurally, they can be divided into round and square shapes. In urban road administration, round shapes are generally used because round manhole covers are not easy to tilt and can better protect the safety of pedestrians and vehicles. Municipal manhole covers are placed on the road all year round. After being exposed to the sun and rain, they become rusty and the gaps are filled with cement and sand. It is often found that when the manhole cover is damaged and needs to be replaced or opened for maintenance, the manhole cover cannot be pried up normally. There are currently two main methods for this situation: 1. Insert a T-shaped rod into the reserved hole of the manhole cover and then use a jack to pull the manhole cover on the strong net; 2. Use a high-pressure pneumatic air shovel to remove the road cement or asphalt around the manhole cover, and then remove the manhole ring and the manhole cover together. If method 1 is adopted, the reserved hole of the manhole cover will be damaged and the manhole cover cannot be lifted, and it will eventually have to be demolished; if method 2 is adopted for demolition, the entire manhole ring will be removed at the same time, which is costly and labor-intensive. After installing a new manhole ring and manhole cover, the road surface needs to be repaired, and the processing cycle is long. Summary of the Invention

[0003] In view of the above shortcomings, the present invention provides a method for quickly removing a manhole cover that cannot be pried up normally.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A municipal manhole cover grinding removal device includes a support frame, which includes support columns and a top plate; a plurality of support columns are provided on the lower outer side of the top plate; a movable groove is provided on the inner side of the support column; a lead support rod is longitudinally provided in the movable groove; it also includes a lifting platform, a movable protrusion is provided on the outer side of the lifting platform corresponding to the movable groove; the movable protrusion is provided with a lead rod socket corresponding to the lead support rod; the lead support rod is provided through the lead rod socket; a telescopic rod is provided on the lifting platform; a circular guide rail is provided on the lower side of the lifting platform; a slider is provided on the circular guide rail; a grinding motor is provided on the lower side of the slider; the output shaft of the grinding motor is detachably connected to a grinding head.

[0006] Preferably, a support spring is sleeved inside the lead support rod, and the support spring is arranged below the movable protrusion and presses the movable protrusion upward.

[0007] Preferably, the slider is an electrically driven slider.

[0008] Preferably, the lower end of the telescopic rod is connected to the upper side of the lifting platform; and the upper end of the telescopic rod is connected to the telescopic device.

[0009] Preferably, the telescopic device is a telescopic cylinder.

[0010] Preferably, the telescopic device is a lever mechanism.

[0011] Preferably, the lower portion of the support column is provided with a telescopic slot, in which a support foot is provided in a liftable manner; a tightening bolt is provided on one side of the telescopic slot; and the support foot is provided with a plurality of screw holes in the longitudinal direction. Preferably, a positioning laser is provided in the center of the lower side of the lifting platform.

[0012] The method for removing a municipal manhole cover by grinding using the removal device described above includes the following steps:

[0013] S1: Place the device on the manhole cover, align the center of the manhole cover using the positioning laser, and then use steel nails to pass through the screw holes of the support legs and drive them into the road surface to achieve fixation;

[0014] S2: Align the grinding head with the outer edge of the manhole cover;

[0015] S3: Starting the grinding motor and the electric drive slider; controlling the lifting platform to gradually descend, causing the grinding head to grind the outer edge of the manhole cover; the electric drive slider moves along the circular guide rail to drive the grinding head to grind the outer edge of the manhole cover;

[0016] S4: Grinding is completed when the grinding depth reaches more than two-thirds of the thickness of the manhole cover frame and the grinding track reaches more than one-half of the circumference of the manhole cover;

[0017] S5: Use a hammer to hit the manhole cover to fully release the stress of the manhole cover, and then the manhole cover can be removed. Preferably, if the road surface is uneven, the support legs are adjusted to maintain the stability and fixation of the entire device. Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The demolition device of the present invention can realize high-speed grinding of the outer edge of the manhole cover, and the grinding head makes a circular motion along the outer edge of the manhole cover. At the same time, it can control the lifting and lowering of the grinding head to promote the control of the grinding depth of the manhole cover. For example, the grinding head can be controlled to gradually descend to fully release the stress related to the manhole cover, ensuring that the manhole cover can be removed smoothly and easily.

[0019] 2. The demolition method of the present invention is simple to operate, has high demolition efficiency, causes almost no damage to the road surface, and significantly reduces the operation cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0021] Figure 1 This is a schematic structural diagram of the present invention when a telescopic cylinder is used;

[0022] Figure 2 This is a schematic structural diagram of the present invention when a compression rod structure is adopted;

[0023] Figure 3 It is a structural schematic diagram of the grinding motor fixing bracket of the present invention when an adjustable connection is adopted;

[0024] Figure 4 It is a side view of the adjustable structure of the fixing bracket of the grinding motor of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "inside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0027] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, or electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] like Figures 1 to 4As shown, a municipal manhole cover grinding removal device includes a support frame, which includes a support column 9 and a top plate 1; a plurality of support columns 9 are provided on the lower outer side of the top plate 1; in this embodiment, four support columns 9 are provided, and the support columns 9 are used to support the device on the road surface and achieve horizontal adjustment and locking fixation to prevent the device from moving due to vibration during operation; a movable groove 6 is provided on the inner side of the support column 9; a lead support rod 5 is longitudinally provided in the movable groove 6; a lifting platform 20 is also included, and a movable protrusion 20-1 is provided on the outer side of the lifting platform 20 corresponding to the movable groove 6; the movable protrusion 20-1 is provided with a lead rod socket 19 corresponding to the lead support rod 5; the lead support rod 5 is arranged through the lead rod socket 19, so that the design The function is to enable the lifting platform 20 to be lifted and lowered smoothly along the lead support rod 5; the lifting platform 20 is provided with a telescopic rod 4, and the function of this telescopic rod 4 is to enable the lifting platform 20 to be subjected to force, such as forcing the lifting platform 20 to move downward; the lower side of the lifting platform 20 is provided with a circular guide rail 15; the circular guide rail 15 is provided with a slider 7; in this embodiment, the slider 7 adopts an electric drive slider, which is slowly driven by the reduction motor 8 to enable the slider 7 to move along the circular guide rail 15; the lower side of the slider 7 is connected to the grinding motor bracket 14 by a connecting bracket 14-1; the grinding motor bracket 14 is fixed with a grinding motor 13; the output shaft of the grinding motor 13 is detachably connected to the grinding head 12. The grinding head 12 can be selected according to the different materials of the manhole cover, such as a diamond grinding head, a tungsten steel grinding head, a grinding wheel grinding head, etc. The structure of the grinding head can also be selected from a conical grinding head or a cylindrical grinding head with better impact resistance. Through the high-speed rotation of the grinding head 12 and the downward squeezing of the telescopic rod 4, the grinding head 12 can quickly grind the outer edge area of ​​the manhole cover, so as to quickly break the stress between the manhole cover and the manhole ring, so that the manhole cover can be smoothly removed from the manhole ring.

[0029] Preferably, the lower end of the telescopic rod 4 is connected to the upper side of the lifting platform 20; and the upper end of the telescopic rod 4 is connected to the telescopic device.

[0030] In some embodiments, the telescopic device is a telescopic cylinder 2, and the telescopic cylinder 2 can be optionally a double-acting hydraulic cylinder. When a double-acting hydraulic cylinder is used, the telescopic rod 4 is fastened to the upper side of the lifting platform 20 by connecting a tightening piece, and then the telescopic rod 4 is fastened to the telescopic head of the double-acting hydraulic cylinder, and the lifting and lowering control of the lifting platform 20 is achieved by relying on the double-acting hydraulic cylinder.

[0031] In some embodiments, the telescopic device is a lever mechanism, such as Figure 2As shown, the lever mechanism includes a lever support arm 24, a rotating support shaft 23 and a pressure rod 22. The pressure rod 22 is a force arm, and a pressure head 25 is provided at the end thereof. The pressure head 25 is provided at the top end of the telescopic rod 4. When in use, the telescopic rod 4 can be pressed down as needed to control the grinding depth of the grinding head 12.

[0032] Preferably, a support spring 18 is sleeved inside the lead support rod 5, and the support spring 18 is arranged below the movable protrusion 20-1 and presses the movable protrusion 20-1 upward. The function of providing the support spring 18 is to cooperate with the lifting platform 20 to support when the telescopic device is a lever mechanism. Preferably, a telescopic slot 16 is provided at the lower part of the support column 9, and a support foot 11 is provided in the telescopic slot 16 which can be raised and lowered; a tightening bolt 17 is provided on one side of the telescopic slot 16; and a plurality of screw holes 10 are provided longitudinally on the support foot 11. When in use, stable support can be achieved by adjusting the height of the support foot 11, and the device can be fixed by passing a steel nail through the screw hole 10 and hammering it into the road surface to prevent displacement during use.

[0033] Preferably, a positioning laser is provided at the center position of the lower side of the lifting platform 20. The advantage of this design is that when in use, the positioning laser can be turned on to align with the center position of the manhole cover, which facilitates the positioning operation and enables the grinding head to better grind along the outer edge of the manhole cover.

[0034] In order to achieve the adjustment of the grinding diameter to meet the needs of operations on manhole covers of different sizes, in some embodiments, the grinding motor bracket 14 can also be connected to the connecting bracket 14-1 using an adjustable device, such as Figures 3-4 As shown, the grinding motor bracket 14 is connected by a T-shaped block 28, and then a T-shaped slot connecting block 27 is provided at the lower part of the connecting bracket 14-1. A plurality of clamping screws 26 are provided on the side of the T-shaped slot connecting block 27 to lock the adjusted T-shaped block 28. That is, by horizontally adjusting the T-shaped block 28, the grinding head 12 can be horizontally adjusted along the radial direction of the lifting platform 20, and then the diameter of the circular motion of the grinding head 12 can be adjusted to meet the grinding operation of cylinder heads of different sizes.

[0035] The method for removing a municipal manhole cover by grinding using the removal device described above includes the following steps:

[0036] S1: Place the device above the manhole cover, align the center of the manhole cover using the positioning laser, and then use steel nails to pass through the screw holes of the support legs and drive them into the road surface to achieve fixation; before this, if the road surface is uneven, adjust the support legs to maintain the stable fixation of the entire device; the ultimate purpose of the support legs is not only to maintain stability but also to ensure that the lifting platform 20 is parallel to the manhole cover surface;

[0037] S2: Align the grinding head with the outer edge of the manhole cover;

[0038] S3: Starting the grinding motor and the electric drive slider; controlling the lifting platform to gradually descend, causing the grinding head to grind the outer edge of the manhole cover; the electric drive slider moves along the circular guide rail to drive the grinding head to grind the outer edge of the manhole cover;

[0039] S4: Grinding is completed when the grinding depth reaches more than two-thirds of the thickness of the manhole cover frame and the grinding track reaches more than half of the circumference of the manhole cover. Because the manhole cover is generally thicker in the middle and lower parts, and the frame of the upper part of the manhole cover is relatively thin, and the manhole cover is stuck mainly because the outer periphery of the manhole cover frame and the manhole ring are stuck, such as caused by rust expansion. Therefore, grinding the manhole cover frame can release the stress between the manhole cover and the manhole ring, ensuring that the manhole cover can be removed smoothly without causing damage to the road surface.

[0040] S5: Use a hammer to hit the manhole cover to fully release the stress of the manhole cover, and then the manhole cover can be removed.

Claims

1. A municipal manhole cover grinding removal device, characterized by: The invention comprises a support frame, wherein the support frame comprises a support column and a top plate; a plurality of support columns are provided on the lower outer side of the top plate; a movable groove is provided on the inner side of the support column; a lead support rod is longitudinally provided in the movable groove; the lifting platform is also included, a movable protrusion is provided on the outer side of the lifting platform corresponding to the movable groove; the movable protrusion is provided with a lead rod insertion hole corresponding to the lead support rod; the lead support rod is provided through the lead rod insertion hole; a telescopic rod is provided on the lifting platform; a circular guide rail is provided on the lower side of the lifting platform; a slider is provided on the circular guide rail; a grinding motor is provided on the lower side of the slider; the output shaft of the grinding motor is detachably connected to the grinding head; The slider is an electrically driven slider; The lower part of the support column is provided with a telescopic slot, and a supporting foot is provided in the telescopic slot so as to be liftable; a tightening bolt is provided on one side of the telescopic slot; and a plurality of screw holes are provided in the longitudinal direction of the supporting foot; A positioning laser is provided at the center of the lower side of the lifting platform; The steps for dismantling using this device are as follows: S1: Place the device on the manhole cover, align the center of the manhole cover using the positioning laser, and then use steel nails to pass through the screw holes of the support legs and drive them into the road surface to achieve fixation; S2: Align the grinding head with the outer edge of the manhole cover; S3: Starting the grinding motor and the electric drive slider; controlling the lifting platform to gradually descend, causing the grinding head to grind the outer edge of the manhole cover; the electric drive slider moves along the circular guide rail to drive the grinding head to grind the outer edge of the manhole cover; S4: Grinding is completed when the grinding depth reaches more than two-thirds of the thickness of the manhole cover frame and the grinding track reaches more than one-half of the circumference of the manhole cover; S5: Use a hammer to hit the manhole cover to fully release the stress of the manhole cover, and then the manhole cover can be removed.

2. A municipal manhole cover grinding removal device according to claim 1, characterized in that: A support spring is sleeved in the lead support rod. The support spring is arranged below the movable protrusion and presses the movable protrusion upward.

3. The municipal manhole cover grinding removal device according to claim 1, characterized in that: The lower end of the telescopic rod is connected to the upper side of the lifting platform; the upper end of the telescopic rod is connected to the telescopic device.

4. The municipal manhole cover grinding removal device according to claim 3, characterized in that: The telescopic device is a telescopic cylinder.

5. The municipal manhole cover grinding removal device according to claim 3, characterized in that: The telescopic device is a lever mechanism.

6. The municipal manhole cover grinding removal device according to claim 1, characterized in that: In step S1 , if the road surface is uneven, the supporting feet are adjusted to maintain the stability and fixation of the entire device.

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