Slide rail type large-diameter cast iron pipe girdling cutter

Abstract

The utility model provides a slide rail type large-caliber cast iron pipe girdling cutter which comprises a cutting device, a slide rail device and a moving operation device, a cutting machine in the cutting device is connected to a cutting machine arc-shaped base through a cutting machine fixing piece, and a rail pulley is fixedly arranged on the bottom face of the cutting machine arc-shaped base. A cutting saw disc on the cutting machine extends out of the outer side of the end face of the arc-shaped sliding rail. A split type arc-shaped sliding rail in the sliding rail device comprises at least two cylindrical arc-shaped sliding rail sections which are connected to form a barrel matched with a cast iron pipe to be cut, a sliding rail inner protection pad is fixedly arranged on the inner side face of the arc-shaped sliding rail, a cutting machine arc-shaped base can be arranged on the arc-shaped sliding rail in a circumferential moving mode, and a guide structure is formed by rail pulleys. The arc-shaped base of the cutting machine can do circumferential movement along the end face of the cylinder body of the arc-shaped sliding rail; in the moving operation device, a support is fixed to an arc-shaped base of the cutting machine, and an operation handle is connected to the support. The cutter can be used for cutting large-pipe-diameter cast iron pipes on site with high precision and high efficiency.

Description

Technical Field

[0001] The utility model relates to a slide rail type large-diameter cast iron pipe circumferential cutting device, which is mainly a device for realizing the random length cutting of large-diameter cast iron pipes and belongs to a large-diameter pipe cutting device. Background Art

[0002] With the acceleration of the urban infrastructure construction process and the increasing renovation of old pipe networks, large-diameter cast iron pipes are increasingly widely used in construction fields such as water supply, drainage, and gas transmission. The demand for on-site cutting to adapt to construction dimensions is also increasing. However, the current commonly used cutting methods on construction sites, such as mechanical cutting with hand-held cutting machines and oxyacetylene thermal cutting, generally have disadvantages such as high risks of operation safety hazards, uneven and smooth cutting surfaces, and difficult precise control of cutting lengths, seriously affecting construction quality and efficiency. Even if the cut products do not meet the construction requirements, it will directly cause material waste and cost losses. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a slide rail type large-diameter cast iron pipe circumferential cutting device with simple device structure, convenient operation, and precise positioning of the cutting surface, which can effectively solve the defects in the current on-site construction cutting of large-diameter cast iron pipes.

[0004] A further purpose of the utility model is that the provided cutting device is small in volume, light in weight, and convenient to carry and move, and can well meet the engineering construction needs of outdoor long pipeline mobile construction.

[0005] To achieve the above purpose, the utility model adopts the following design scheme:

[0006] A slide rail type large-diameter cast iron pipe circumferential cutting device, which includes a cutting device A, a slide rail device B, and a mobile operation device C.

[0007] The cutting device A includes a cutting machine, a cutting machine fixing part, an arc-shaped base, and a track pulley. The cutting machine is connected to the arc-shaped base through the cutting machine fixing part. The cutting machine is fixedly or movably arranged on the cutting machine fixing part. The track pulley is fixedly arranged on the bottom surface of the arc-shaped base. The cutting saw disc on the cutting machine extends outside the end face of an arc-shaped slide rail.

[0008] The slide rail device B includes a split type of the arc-shaped slide rail, a slide rail inner cushion, and a connecting piece. The arc-shaped slide rail includes at least two cylindrical arc-shaped slide rail segments, which are detachably connected into a cylinder body matching the cast iron pipe to be cut through the connecting piece. The slide rail inner cushion is fixedly arranged or padded on the inner side surface of the arc-shaped slide rail. The arc-shaped base is circumferentially movably placed on the arc-shaped slide rail. The track pulley is placed on the end face of the arc-shaped slide rail, forming a guiding structure with the arc-shaped slide rail, so that the arc-shaped base can perform circumferential movement along the cylinder body end face of the arc-shaped slide rail.

[0009] The mobile operating device C includes an operating handle and a bracket. The bracket is fixed on the arc-shaped base, and the operating handle is connected to the bracket.

[0010] The cylinder body is a strip-shaped annular cylinder body.

[0011] In use, the split arc-shaped slide rail is assembled and fixed on the cast iron pipe to be cut. The cutting device is installed on the arc-shaped slide rail. By pushing the operating handle, the arc-shaped base can move circumferentially on the arc-shaped slide rail, so that the cutting device can move on a circumference of the circumferential surface of the cast iron pipe under the guiding action of the end face of the arc-shaped slide rail. When cutting the cast iron pipe, the saw blade can be pressed down to cut the cast iron pipe by pulling the operating lever carried by the cutting machine itself. After cutting, by releasing the operating lever, the saw blade can be lifted.

[0012] In the cutting device A:

[0013] Preferably, the cutting machine can be a finished cutting machine in the prior art.

[0014] Preferably, the track pulleys are arranged in pairs and symmetrically fixed on the two end edges in the width direction of the arc-shaped base. A pair of track pulleys are located on the two end faces of the arc-shaped slide rail, so that the arc-shaped base is stuck on the two end faces of the arc-shaped slide rail.

[0015] Preferably, the track pulley is a pulley assembly, including a fixed plate type pulley support and two pulleys. The pulley support is fixed to the arc-shaped base. Two pulleys with parallel axes are arranged on the pulley support. There is a gap between the upper and lower pulleys, and the arc-shaped slide rail is embedded in this gap. The end face of the arc-shaped slide rail abuts against the pulley support.

[0016] Preferably, the lower bottom surface of the track pulley exceeds the inner surface of the arc-shaped slide rail but does not exceed the inner surface of the inner cushion of the slide rail, that is, the track pulley does not contact the surface of the cast iron pipe to be cut.

[0017] The above-mentioned setting method of the track pulley on the arc-shaped base can be to set one track pulley at each of the four corners at both ends of the arc-shaped base, and braking devices are arranged on the two track pulleys at the same end as the bracket is set. It can also be to set a pair of track pulleys only at the two corners at the opposite end of the bracket setting, and the end of the arc-shaped base where the bracket is set is directly placed on the arc-shaped slide rail.

[0018] In the slide rail device B:

[0019] The arc-shaped slide rail and the inner cushion of the slide rail can be fixed as a whole or can be separately arranged.

[0020] The separately arranged inner cushion of the slide rail is clamped between the arc-shaped slide rail and the cast iron pipe during use.

[0021] The outer surface of the inner cushion of the sliding rail matches the inner surface of the arc-shaped sliding rail, and the inner surface matches the outer surface of the object to be cut, such as a cast iron pipe.

[0022] The function of the inner cushion of the sliding rail is to make the arc-shaped sliding rail fit better with the surface of the cast iron pipe, which is the object to be cut.

[0023] Preferably, the connecting members connecting the arc-shaped sliding rail segments are connecting bolts and nuts.

[0024] Furthermore, the connection structure between two adjacent arc-shaped sliding rail segments can be: at both ends of each arc-shaped sliding rail segment, a vertical plate, i.e., a lug, is connected. Bolt holes are provided on the lugs. The bolt holes on the lugs on the end faces of two adjacent arc-shaped sliding rail segments correspond to each other. A connecting bolt is inserted and fixed by a nut.

[0025] Another function of the inner cushion of the sliding rail is to maintain a set distance between the arc-shaped sliding rail and the surface of the cast iron pipe, so that the track pulley provided on the arc-shaped sliding rail does not contact the surface of the cast iron pipe. In this way, the track pulley will not affect the cutting of the cast iron pipe. Therefore, preferably, the pulley diameter of the track pulley is not greater than the thickness of the inner cushion of the sliding rail. For the pulley assembly, the diameter of the pulley located below the arc-shaped sliding rail is not greater than the thickness of the inner cushion of the sliding rail.

[0026] In order to enable the cutter installed on the cast iron pipe to be cut to complete a 360° circumferential movement on the arc-shaped sliding rail after one installation, that is, the arc-shaped base can smoothly pass through the connection structure between two adjacent arc-shaped sliding rail segments to complete the cutting of the entire cast iron pipe, rather than having to remove the cutting device from the arc-shaped sliding rail when passing through the connection structure. Preferably, the diameter of the pulley located on the upper surface of the arc-shaped track in the pulley assembly is greater than the height of the lug. Correspondingly, a circumferential gap is left between the lug and the end edge of the arc-shaped base, so that the pulley on the upper part of the track pulley group can slide over through the lug, thereby enabling the cutting device to slide on the arc-shaped track without being hindered when passing through the connection of two arc-shaped track segments. When cutting the cast iron pipe, the cutting device A can be circumferentially moved on the sliding rail device B, or the cast iron pipe can be circumferentially rotated relative to the sliding rail device B.

[0027] Preferably, the split arc-shaped sliding rail is composed of two cylindrical arc-shaped sliding rail segments, namely arc-shaped sliding rail I and arc-shaped sliding rail II. The connecting members are connecting bolts and nut I, connecting bolts and nut II. The connecting bolts are inserted into the bolt holes on two adjacent lugs and locked and fixed by nuts;

[0028] In one embodiment, the inner surfaces of each arc-shaped slide rail section, namely arc-shaped slide rail section I and arc-shaped slide rail section II, are respectively welded with the inner slide rail pads, namely inner slide rail pad I and inner slide rail pad II. Alternatively, a split inner slide rail pad may be provided on the inner surface of the arc-shaped slide rail section, and inner slide rail pad I and / or inner slide rail pad II may also be composed of several inner slide rail pad blocks.

[0029] Furthermore, the inner slide rail pads may cover the entire inner wall of the arc-shaped slide rail or be provided on a part of the inner wall.

[0030] Preferably, the two cylindrical arc-shaped slide rail sections are semi-cylindrical barrels.

[0031] In the mobile operation device C:

[0032] One preferred solution is that the bracket includes a fixed vertical rod and a fixed inclined rod. The lower end of the fixed vertical rod is fixed on the arc-shaped base, the upper end of the fixed inclined rod is fixedly connected to the upper end of the fixed vertical rod, and the lower end is fixedly connected to the cutting machine body or the cutting machine fixing member. The operating handle is fixed on the fixed vertical rod or simultaneously fixed on the fixed vertical rod and the fixed inclined rod. During use, the operator pushes the operating handle by hand, so that the cutting machine placed on the arc-shaped base moves circumferentially on the arc-shaped slide rail.

[0033] Another preferred solution is that the bracket includes a fixed rod and a movable rod. The lower end of the fixed rod is fixed on the arc-shaped base, one end of the movable rod is connected to the upper end of the fixed rod through a hinge shaft, and the other end of the movable rod is fixed on the cutting machine body or the cutting machine fixing member. The operating handle is movably connected to the fixed rod and hinged to the movable rod.

[0034] The movable connection structure may be: the operating handle is hinged to the fixed rod through a hinge shaft.

[0035] The movable connection structure may also be: a vertical long groove is provided on the fixed rod, the operating handle is inserted into the vertical long groove, a hinge shaft penetrates through the opposite side walls of the vertical long groove and is hinged to the rod section of the operating handle therein. One end of the operating handle is hinged to the middle of the movable rod, and the other end is provided with a handle.

[0036] Another preferred solution is that the bracket includes a fixed rod, a movable rod and an operating handle. The lower end of the fixed rod is fixedly connected to the arc-shaped base. The lower end of the movable rod is connected to the cutting machine body. A guide wheel is provided on the cutting machine body, and the guide wheel is slidably arranged in a slideway on the cutting machine fixing member. The upper ends of the fixed rod and the movable rod are hingedly connected by a hinge shaft. The operating handle is a rod body, which is respectively hinged to the fixed rod and the movable rod. The slideway is an arc-shaped slideway, and the center of rotation thereof is the axis of the hinge shaft. So that by pulling the operating handle, the movable rod rotates around the axis of the hinge shaft, and the guide wheel on the cutting machine body connected to its lower end moves in the circular slideway on the cutting machine fixing member, the cutting machine can be driven to move from far to near towards the cast iron pipe to realize the sliding cutting of the large-diameter cast iron pipe by the cutting machine, or move in the reverse direction to stop cutting. A return spring is arranged between the cutting machine body and the cutting machine fixing member.

[0037] Another preferred solution is that the bracket includes a fixed rod, a movable rod and an operating handle. The lower end of the fixed rod is fixedly connected to the arc-shaped base. The lower end of the movable rod is connected to the cutting machine body. The upper ends of the fixed rod and the movable rod are hingedly connected by a hinge shaft. The cutting machine body is connected to the cutting machine fixing member by a hinge shaft, so that the cutting machine body can rotate through an angle relative to the cutting machine fixing member. A return spring is arranged between the cutting machine body and the cutting machine fixing member.

[0038] Through the above two structures, the two processes of the circumferential movement of the cutting machine on the arc-shaped track and the cutting of the cast iron pipe can be completed simultaneously by operating the handle, and the operation is simpler.

[0039] Preferably, the fixed connection structure between the lower end of the fixed rod and the arc-shaped base is a detachable connection structure, and the connection between the movable rod and the cutting machine body can also be a detachable connection structure. Such a detachable connection structure can be, for example, a bolt connection structure. Such a structure can make it more convenient and light to carry by disassembling the bracket from the arc-shaped track.

[0040] The rail - type large - diameter cast iron pipe circumferential cutting device provided by the utility model combines a cutting device, a rail device and a moving operation device and fixes them on a large - diameter cast iron pipe. The cutting machine in the cutting device is arranged on an arc - shaped base, and the arc - shaped base is arranged on an arc - shaped rail fastened to the cast iron pipe. The track pulley on the arc - shaped base abuts against the end face of the arc - shaped rail. By pushing the operation handle, the whole cutting device is driven to move circumferentially along the arc - shaped rail. By operating the handle or the joystick on the cutting machine, the saw blade on the cutting machine can be made to approach the cast iron pipe from far to near to perform the cutting operation. Because the cutting machine can accurately move circumferentially along the end face of the arc - shaped rail, that is, along the cross - section perpendicular to the axis of the cast iron pipe during the axial movement along the arc - shaped rail, it can ensure that the cutting surface of the cutting tool on the cast iron pipe is parallel to the end face of the arc - shaped rail and perpendicular to the axis of the cast iron pipe, so as to achieve accurate positioning for cutting the large - diameter cast iron pipe, with a smooth and flat cutting surface and accurate control of the cutting length.

[0041] In use, this cutting device can perform the cutting operation on the upper semi - circumference of the cast iron pipe while moving circumferentially on the cast iron pipe. When cutting the lower semi - circumference, the cast iron pipe can be rotated to turn the uncut part to the upward position for continuous cutting. During the whole cutting process, the cutting device does not need to be removed from the cast iron pipe.

[0042] By matching with a rail device B that matches the cast iron pipe and a matching arc - shaped base, the utility model can be applicable to cutting cast iron pipes of various different diameters. Especially for large - diameter cast iron pipes that are not convenient to cut the size in advance in the processing factory, on - site construction can be carried out. Install the arc - shaped track that matches the outer diameter of the cast iron pipe to be cut at the position to be cut on the cast iron pipe, and then clamp the arc - shaped base connected with the cutting device on the arc - shaped rail to perform the cutting operation. Compared with the handheld cutting machinery in the prior art, the utility model can cut arbitrarily according to the construction size requirements at the construction site, and can ensure the cutting quality, without the trouble of having to cut in the factory due to low on - site cutting accuracy and then transporting the large - volume processed cast iron pipes to the site, providing great convenience for the transportation of finished components and the cutting of non - standard sizes at the construction site.

[0043] For the cutting device provided by the utility model, the cutting device, the rail device and the moving operation device can all be made into detachable connection structures. Since the large - size rail device is made into a split - type arc - shaped rail and the moving operation device can also be detached from the arc - shaped base, after splitting, it has the advantages of small volume, light weight, and convenient handling and moving, being easy to carry and transport. Therefore, it can well meet the engineering construction needs of outdoor long - pipeline mobile construction, greatly improving the quality and efficiency of pipeline cutting construction at long - distance and large - area construction sites, and saving construction costs and resources.

[0044] The following further illustrates the present utility model through the drawings and embodiments. Description of the Drawings

[0045] Figure 1 The front view structural schematic diagram of Embodiment 1 of the sliding rail type large-diameter cast iron pipe circumferential cutting device provided by the present utility model;

[0046] Figure 2 is Figure 1 The top view structural schematic diagram of the shown Embodiment 1;

[0047] Figure 3 The connection structural schematic diagram of the cutting machine and the cutting machine fixing seat in Embodiment 1;

[0048] Figure 4 The structural schematic diagram of a group of track pulleys symmetrically installed on the arc-shaped sliding rail base and composed of two pulley assemblies in Embodiment 1;

[0049] Figure 5 The structural schematic diagram showing the circumferential gap between the lug and the edge of the arc-shaped sliding rail end in Embodiment 1;

[0050] Figure 6 The perspective view of Embodiment 3 of the sliding rail type large-diameter cast iron pipe circumferential cutting device provided by the present utility model, and showing the situation of the cutting device installed on the cast iron pipe for cutting;

[0051] Figure 7 is Figure 6 The enlarged structural schematic diagram of the hinged part of the operating handle and the fixing rod;

[0052] Figure 8 The perspective structural schematic diagram of a deformed structure of Embodiment 1;

[0053] Figure 9 The perspective structural schematic diagram of a structure of Embodiment 2.

[0054] Wherein:

[0055] Cutting device A, finished cutting machine 1, cutting machine fixing part 2, arc-shaped base 3, track pulley 4,

[0056] Sliding rail device B, arc-shaped sliding rail I 5, sliding rail inner cushion protection I 6, connecting screw and nut I 7, arc-shaped sliding rail II 8, sliding rail inner cushion protection II 9, connecting screw and nut II 10,

[0057] Moving operation device C, operating handle 11, fixing rod 12, hinge connection buckle 13, moving rod 14,

[0058] Cast iron pipe D. Specific implementation manners

[0059] Such as Figures 1 to 5As shown, the present utility model provides a sliding rail type large-diameter cast iron pipe circumferential cutting device, which is used in matching with the corresponding cast iron pipe D in terms of diameter. The following only illustrates the possible implementation modes of the present utility model by way of examples, but is not intended to limit the scope of protection of the present utility model, which is hereby stated first.

[0060] Embodiment 1

[0061] As Figure 1 and Figure 2 As shown, a sliding rail type large-diameter cast iron pipe circumferential cutting device includes a cutting device A, which includes a finished product cutting machine 1, a cutting machine fixing part 2, an arc-shaped base 3 and a track pulley 4, and also includes a sliding rail device B, including a split arc-shaped sliding rail, a sliding rail inner cushion and a connecting part. Specifically, the split arc-shaped sliding rail is composed of an arc-shaped sliding rail I 5, a sliding rail inner cushion I 6, a connecting screw and a nut I 7, an arc-shaped sliding rail II 8, a sliding rail inner cushion II 9, a connecting screw and a nut II 10, and also includes a moving operation device C, which includes an operation handle 11 and a bracket. The bracket includes a fixed rod 12, a hinge connecting buckle 13 and a moving rod 14.

[0062] In the cutting device A, the finished product cutting machine 1 is installed on a customized arc-shaped base 3 through a cutting machine fixing seat 2. A cutting machine fixing part 2 is arranged on the arc-shaped base 3, and a cutting machine 1 is arranged on the cutting machine fixing part 2. The cutting machine 1 is movably connected with the cutting machine fixing part 2. A guide wheel 101 is arranged on the body of the cutting machine 1, and the guide wheel 101 is slidably arranged in a slideway 21 on the cutting machine fixing part 2 (see Figure 4 ), and a return spring (not shown in the figure) is arranged between the body of the cutting machine 1 and the cutting machine fixing part 2.

[0063] The whole finished product cutting machine 1 is installed on the arc-shaped base 3 by using the cutting machine fixing part 2. A group of track pulleys 4 are connected to the lower part of one end of the arc-shaped base 3 along the circumferential direction. In this embodiment, the group of track pulleys are two track pulleys, which are symmetrically fixed on the two side edges of the arc-shaped base 3 (see Figure 3 ), and are exactly stuck with the two side end faces of the arc-shaped sliding rail I 5 in the sliding rail device B. The cutting machine 1 can move circumferentially around the cast iron pipe D under the guidance of the arc-shaped sliding rail. The lower part of the other end of the arc-shaped base 3 is placed on the arc-shaped sliding rail I 5 of the sliding rail device B. Among them, the radian of the arc-shaped base 3 depends on the radian of the large-diameter cast iron pipe. Different radian bases need to be customized for cutting cast iron pipes of different diameters.

[0064] In this cutting device, the whole finished product cutting machine 1 is installed on a customized arc-shaped base 3 by using the cutting machine fixing part 2. The pulley diameter of the track pulley 4 is not greater than the thickness of the sliding rail inner cushion I 6. As Figure 1 and Figure 3As shown, the track pulley 4 is a pulley assembly, including a fixed plate - type pulley support 41 and two pulleys, an upper pulley 42 and a lower pulley 43. The pulley support 41 is fixed to the arc - shaped base 3. Two pulley shafts with parallel axes are provided on the pulley support 41, and upper and lower pulleys are arranged on the pulley shafts. There is a gap between the upper and lower pulleys, and the arc - shaped slide rail 5 is embedded in this gap. The end faces on both sides of the arc - shaped slide rail abut against the pulley support 41. The lower bottom surface of the track pulley 4, which is the diameter of the lower pulley 43 here, is not greater than the thickness of the inner cushion of the slide rail. In this way, the lower bottom surface of the lower pulley can exceed the inner surface of the arc - shaped slide rail I 5 but not exceed the inner surface of the inner cushion I 6 of the slide rail, that is, it does not contact the cast - iron pipe D.

[0065] As Figure 1 shown, in the slide - rail device B, two arc - shaped slide - rail segments, namely the arc - shaped slide rail I 5 and the arc - shaped slide rail II 8, form an entire cylindrical arc - shaped slide rail. The inner cushion guards I 6 and the inner cushion guards II 9 are respectively fixed on the inner surfaces of the two arc - shaped slide - rail segments. The arc - shaped slide - rail segments and the inner cushion guards of the slide rail can be fixed into a whole by welding.

[0066] As Figure 1 shown, lugs with bolt holes are respectively arranged at both ends of the arc - shaped slide rail I 5 and the arc - shaped slide rail II 8, and are respectively fixedly connected together by connecting pieces, namely connecting bolts 7 and 10 and nuts, to form an entire circular track. Among them, the radian of the arc - shaped slide rail I 5, the inner cushion guard I 6 of the slide rail, the arc - shaped slide rail II 8, and the inner cushion guard II 9 of the slide rail depends on the radian of the large - diameter cast - iron pipe. Different - caliber cast - iron pipes need to be customized with different - radian arc - shaped slide rails and inner cushion guards of the slide rail; at the same time, the size and length specifications of the arc - shaped slide rail I 5 and the inner cushion guard I 6 of the slide rail are consistent. If the inner cushion guard does not completely cover the inner surface of the arc - shaped slide rail, they also need to be matched with each other, and the same is true for the size and length specifications of the arc - shaped slide rail II 8 and the inner cushion guard II 9 of the slide rail.

[0067] The other end of the arc - shaped base 3 is not provided with a track pulley and is directly placed on the outer surface of the arc - shaped slide rail.

[0068] The moving operation device C includes a bracket and an operation handle 11. The bracket includes a fixed rod 12, a hinge connection buckle 13, and a moving rod 14. The adjacent ends of the fixed rod 12 and the moving rod 14 are hinged together by the hinge connection buckle 13 to form a movable bracket. The fixed rod 12 is fixedly connected to the upper surface of the arc - shaped slide rail at the end without a track pulley, and the moving rod 14 is fixed to the body of the cutting machine 1. The operation handle 11 is hingedly connected to the fixed rod 11 and the moving rod 14. Thus, the entire moving operation device C is fixedly connected to the arc - shaped base 3 through the fixed rod 12 and is connected to the cutting machine 1 through the moving rod 14. The fixed - connection structure between the fixed rod 12 and the arc - shaped base 3 can be a detachable connection structure, such as a bolt - connection structure. The moving rod 14 and the body of the cutting machine 1 can also be a bolt - connection structure.

[0069] In the present Embodiment 1, one end of the arc-shaped base 3 fixedly connected to the fixed rod 12 is placed on the arc-shaped slide rail I 5, and the other end is clamped on the arc-shaped slide rail by two symmetrically installed pulley assemblies. One end of the moving rod 14 is hinged to the fixed rod 11, and the other end is fixedly connected to the body of the cutting machine 1. Thus, the moving operation device C and the cutting device A are constituted as an operating whole, making the operation of the cutting machine stable.

[0070] During use,

[0071] First, the arc-shaped slide rail sections of the two inner surface fixed slide rail inner pads of the slide rail device B are fixed on the cast iron pipe D by bolts and nuts; then the cutting device A is placed on the split arc-shaped slide rail and installed on the arc-shaped base 3 by the engagement of the guide wheels on the cutting machine body with the slideway 21 on the cutting machine fixing member 2. The arc-shaped base 3 is clamped on the inner and outer end faces of the arc-shaped slide rail I 5 through a pair of track pulleys 4 thereon; then the moving operation device C is installed, with the fixed rod 12 fixedly connected to the arc-shaped base 3 and the moving rod 14 fixedly connected to the body of the cutting machine 1, thus completing the installation of this cutter. As Figures 1 to 4 shown.

[0072] When cutting the cast iron pipe, pull the operation handle 11, and through the lever action, the moving rod 14 rotates around the hinge connecting buckle 13, pulling the cutting machine 1 to move relative to the arc-shaped base 3 along the slideway 21, so as to achieve the movement of the moving rod 14 from a distance to a closer position to move the cutting machine 1 towards the cast iron pipe to cut the large-diameter cast iron pipe. Release the operation handle 11, and under the action of the return spring, the cutting machine 1 raises the cutting blade away from the cast iron pipe. During the cutting operation, push the operation handle 11 to move the arc-shaped base 3 circumferentially along the arc-shaped slide rail, and the large-diameter cast iron pipe can be cut. When the arc-shaped base 3 moves to the connection part of the two split arc-shaped slide rails, the fixed rod 12 can be lifted upwards to exceed the lug. In order to enable the arc-shaped base 3 to pass through the lug smoothly, the lug can be made shorter. The diameter of the pulley located on the upper surface of the arc-shaped track is greater than the height of the lug to allow the track pulley to pass through. It is also possible to leave a circumferential gap a between the end of the lug and the end edges of the arc-shaped slide rail 5 and the arc-shaped slide rail 8, see

[0073] As shown in Figure 5 to make it more convenient for the track pulley to pass through. During the process of cutting the cast iron pipe, the cast iron pipe can be rolled to keep the cutting port of the cast iron pipe always facing upwards.

[0074] After a cast iron pipe section is cut, the connection bolts I 7 and connection bolts II 10 can be loosened to remove this cutting device, and then it can be installed at another cutting position of the cast iron pipe to cut another section of the cast iron pipe. After all the cutting operations are completed, the two arc-shaped slide rail sections can be disassembled, and the cutting device A can also be removed from the slide rail device B, or the mobile operation device C can be removed from the cutting device A and placed on a vehicle for transportation. Through disassembly, the volume of this cutting device can be made smaller and it is more convenient to carry.

[0075] This cutting device is composed of a cutting device A, a slide rail device B, and a mobile operation device C, which are combined and fixed on a large-diameter cast iron pipe. By pushing the operation handle 11, the moving rod 14 drives the entire cutting device to cut along the arc-shaped slide rail I 5 from far to near, so as to achieve accurate positioning and cutting of the large-diameter cast iron pipe.

[0076] There is also a structure where a track pulley is provided at each of the four corners of the arc-shaped base, and a braking device is provided on two of the track pulleys at the same end as the bracket is set. In this way, when passing through the arc-shaped slide rail connection part, it is not necessary to lift the fixed rod 12 to pass through. However, with such a structure, when cutting the cast iron pipe, it is necessary to control the cutting device A by grasping the operation handle, and the braking device can also be activated, and then the braking device is released when moving forward.

[0077] Similar to the guide wheel and slideway structure between the cutting machine 1 and the cutting machine fixing part 2 described above, there is also such a structure: The bracket includes a fixed rod, a moving rod, and an operation handle. The lower end of the fixed rod is fixedly connected to the arc-shaped base, the lower end of the moving rod is connected to the cutting machine body, the upper ends of the fixed rod and the moving rod are hinged and connected through a hinge shaft, and the cutting machine body and the cutting machine fixing part 2 are connected through a hinge shaft 21' (see Figure 8 ), so that the cutting machine 1 body can rotate by an angle relative to the cutting machine fixing part 2, and a return spring is provided between the cutting machine body and the cutting machine fixing part.

[0078] Embodiment 2:

[0079] On the basis of Embodiment 1, in the cutting device A, no guide wheel is provided on the cutting machine 1, and no slideway is provided on the cutting machine fixing part 2 either. Instead, the cutting machine 1 is directly fixed on the cutting machine fixing part 2 (see Figure 9), for example, the cutting machine 1 and the cutting machine fixing member 2 are fixedly connected by a bolt connecting device 21'', and other structures remain unchanged. In this second embodiment, when the operating handle 11 is pushed, only the cutting machine 1 can be driven to drive the arc-shaped base 3 below it to move circumferentially on the arc-shaped slide rail. When cutting the cast iron pipe D, it is necessary to operate the operating rod 102 on the cutting machine 1 to lower the cutting blade to cut the pipe wall. At the same time, push the operating handle 11 to make the cutting device A move circumferentially around the cast iron pipe to achieve continuous cutting operation. When it is necessary to stop after cutting a section, stop pushing the operating handle 11 and at the same time release the operating rod 102 on the cutting machine, and the cutting blade can be lifted, which is the inherent design of the finished cutting machine.

[0080] Embodiment 3:

[0081] On the basis of Embodiment 2, the cutting machine 1 is directly fixed on the cutting machine fixing member 2. At the same time, in the moving operation device C, the hinge connection buckle 13 between the fixed rod 12 and the moving rod 14 is cancelled and they are directly fixed as a whole, which are respectively called the fixed vertical rod and the fixed inclined rod. The lower end of the fixed vertical rod is fixed on the arc-shaped base, the upper end of the fixed inclined rod is fixedly connected to the upper end of the fixed vertical rod, and the lower end is fixedly connected to the cutting machine body or the cutting machine fixing member. The operating handle is fixed on the fixed vertical rod or simultaneously fixed on the fixed vertical rod and the fixed inclined rod, and other structures remain unchanged.

[0082] Embodiment 4:

[0083] On the basis of Embodiments 1 to 3, in the slide rail device B, the inner cushion of the slide rail is no longer welded and fixed on the inner surface of the arc-shaped slide rail, but is separately arranged from the arc-shaped slide rail and then fixed as a whole through a fixing structure, for example, fixed on the inner surface of the arc-shaped slide rail through a screwing structure.

[0084] In addition, the inner cushion of the slide rail can also be just placed between the arc-shaped slide rail and the cast iron pipe, that is, the inner cushion of the slide rail is not fixedly connected to the arc-shaped slide rail, but is only placed between the arc-shaped slide rail and the cast iron pipe.

[0085] Furthermore, whether the inner cushion of the slide rail is fixed as a whole with the arc-shaped slide rail or a split structure, it can be just discontinuously arranged on a part of the inner surface of the arc-shaped slide rail to play the role of supporting the arc-shaped slide rail on the cast iron pipe D. One said split inner cushion of the slide rail can be several inner cushion blocks.

[0086] Embodiment 5:

[0087] On the basis of Embodiment 1, in the moving operation device C, the hinge structure between the operating handle 11 and the fixed rod 12 has changed, such as Figure 6 and Figure 7As shown in the figure, a vertical through groove 121 extending along the axis of the rod is provided on the fixed rod 12. The hinge shaft 122 is inserted into the vertical through groove 121. The operating handle is inserted into the vertical long groove. A hinge shaft 122 penetrates through the opposite side walls of the vertical long groove and is hinged to the rod section of the operating handle therein. The operating handle 11 is rotatably fixed on the hinge shaft 122. One end of the operating handle is hinged to the middle of the moving rod 14, and a handle is provided at the other end. Other structures remain unchanged. Such a connection structure between the operating handle 11 and the fixed rod 12 can make the opening and closing angle of the operating handle 11 relative to the fixed rod larger, which is more convenient for pushing the cutting device A to move up and down and circumferentially move on the arc-shaped slide rail.

[0088] For the cutting device provided by the present utility model, since the cutting machine 1 is clamped on the end face of the arc-shaped slide rail through the arc-shaped base 3, during the cutting process, the cutting machine can accurately move circumferentially on a cross-section perpendicular to the axis of the cast iron pipe, making the cut end of the cast iron pipe flat and smooth, and the cutting length accurate and easy to control, improving the construction quality and efficiency. The cutting finished product can easily meet the construction requirements, reducing material waste and cost loss. Moreover, due to the detachable connection structure between the fixed rod 12 and the moving rod 14 in the bracket and the arc-shaped base 3 and the cutting machine body, the cutting machine is an installation structure that can be separated from the cutting machine fixing part, and the arc-shaped slide rail is split. Therefore, in the normal split state, each component has the characteristics of small volume and light weight, which is convenient for handling and moving, and can well meet the engineering construction needs of outdoor long pipeline mobile construction, greatly improving the construction quality and efficiency, and saving construction costs and resources.

[0089] The present utility model is defined by the claims described above. However, based on this, those of ordinary skill in the art can make various obvious changes or modifications, such as the arc of the slide rail, the height of the fixed rod and the moving rod of the bracket in the moving operation device C, etc., which should all be within the main spirit and protection scope of the present utility model.

Claims

1. A slide rail type large diameter cast iron pipe ring cutting cutter, characterized in that: It includes a cutting device (A), a slide device (B) and a mobile operating device (C). The cutting device (A) comprises a cutting machine (1), a cutting machine fixing part (2), an arc-shaped base (3) and a track pulley (4); the cutting machine (1) is connected to the cutting machine arc-shaped base (3) via the cutting machine fixing part (2) so as to be fixedly or movably arranged on the cutting machine fixing part (2); the track pulley (4) is fixedly arranged on the bottom surface of the cutting machine arc-shaped base (3); and the cutting saw disc on the cutting machine extends outward from the end surface of an arc-shaped slide rail; The slide rail device (B) comprises the arc-shaped slide rail, which is a split arc-shaped slide rail, an inner slide rail pad and a connecting piece. The split arc-shaped slide rail comprises at least two cylindrical arc-shaped slide rail sections, which are connected to form a cylinder matching the cast iron pipe to be cut through the connecting piece. The inner slide rail pad is fixed or padded on the inner side surface of the arc-shaped slide rail. The arc-shaped base (3) is circumferentially movable on the arc-shaped slide rail. The track pulley (4) is placed on the end surface of the arc-shaped slide rail and forms a guiding structure with the arc-shaped slide rail, so that the arc-shaped base of the cutting machine can move circumferentially along the end surface of the cylindrical body of the arc-shaped slide rail. The mobile operating device (C) comprises an operating handle (11) and a bracket, wherein the bracket is fixed on an arc-shaped base, and the operating handle is connected to the bracket.

2. The slide rail type large diameter cast iron pipe ring cutting cutter according to claim 1, characterized in that: In the cutting device (A), The cutting machine is a finished product cutting machine (1); and / or, The track pulleys (4) are arranged in pairs and are symmetrically fixed on the two end edges of the arc-shaped base (3) of the cutting machine in the width direction, and a pair of track pulleys are located on the two side end surfaces of the arc-shaped slide rail, so that the arc-shaped base is clamped on the two end surfaces of the arc-shaped slide rail; and / or, The track pulley (4) is a pulley assembly, comprising a fixed plate pulley support (41) and two pulleys, the pulley support being fixed to the arc-shaped base, two pulleys with parallel axes being arranged on the pulley support, a gap being provided between the upper and lower pulleys, the arc-shaped slide rail being embedded in the gap, and the end surface of the arc-shaped slide rail being against the pulley support; and / or, The bottom surface of the track pulley exceeds the inner surface of the arc-shaped slide rail but does not exceed the inner surface of the inner protective pad of the slide rail; and / or, The rail pulley (4) is arranged on the arc base in such a manner that a rail pulley is arranged at each of the four corners at both ends of the arc base, wherein a braking device is arranged on the two rail pulleys at the same end as the bracket; or, a pair of rail pulleys is arranged only at the two corners at the end opposite to the bracket, and the end of the arc base where the bracket is arranged is directly placed on the arc slide rail.

3. The slide rail type large diameter cast iron pipe ring cutting cutter according to claim 1, characterized in that: In the slide rail device (B), The cylinder body formed by the arc-shaped slide rail is a belt-shaped annular cylinder body; and / or, The two cylindrical arc-shaped slide rail sections are semi-cylindrical belt-shaped annular cylinders; and / or, The arc-shaped slide rail and the inner pad of the slide rail are fixed as a whole, or are arranged separately; and / or, The inner protective pads of the slide rail are evenly distributed on the inner wall of the arc-shaped slide rail, or are arranged on part of the inner wall; and / or, The outer surface of the inner guard of the slide rail matches the inner surface of the arc-shaped slide rail, and the inner surface matches the outer surface of the object to be cut, such as a cast iron pipe; and / or, The connecting member connecting each of the arc-shaped slide rail segments is a connecting bolt and a nut; and / or, The two ends of the arc-shaped rail sections are each connected to a vertical plate, i.e., a lug, on which a bolt hole is arranged. The lug bolt holes on the end surfaces of two adjacent arc-shaped rail sections correspond to each other, and connecting bolts are inserted therein and fixedly connected by nuts; and / or, The pulley diameter of the track pulley (4) is no greater than the thickness of the inner padding of the slide rail.

4. The slide rail type large diameter cast iron pipe ring cutting cutter according to claim 1, characterized in that: The mobile operating device (C) comprises: The bracket includes a fixed vertical rod and a fixed oblique rod, the lower end of the fixed vertical rod is fixed to the arc-shaped base, the upper end of the fixed oblique rod is fixedly connected to the upper end of the fixed vertical rod, and the lower end is fixedly connected to the cutting machine body or the cutting machine fixing part, and the operating handle is fixed to the fixed vertical rod or fixed to the fixed vertical rod and the fixed oblique rod at the same time, or, The bracket comprises a fixed rod (12), a movable rod (14) and an operating handle (11), the lower end of the fixed rod is fixedly connected to the arc-shaped base (3), the lower end of the movable rod is connected to the body of the cutting machine (1), a guide wheel (101) is provided on the body of the cutting machine, the guide wheel is slidably arranged in a slideway (21) on the fixing part (2) of the cutting machine, the upper ends of the fixed rod and the movable rod are hingedly connected by a hinge shaft (13), the operating handle is a rod body, which is hinged to the fixed rod and the movable rod respectively, the slideway is an arc-shaped slideway, and its rotation center is the axis of the hinge shaft, so that by pulling the operating handle, the movable rod rotates around the axis of the hinge shaft, and the guide wheel on the body of the cutting machine connected to the lower end moves in the annular slideway on the fixing part of the cutting machine, and a reset spring is arranged between the body of the cutting machine and the fixing part of the cutting machine; or The bracket includes a fixed rod, a movable rod and an operating handle, the lower end of the fixed rod is fixed on the arc-shaped base, one end of the movable rod is connected to the upper end of the fixed rod through a hinge shaft, the other end of the movable rod is fixed to the body of the cutting machine or the fixing part of the cutting machine, and the operating handle is movably connected to the fixed rod and hinged to the movable rod; or, The bracket includes a fixed rod, a movable rod and an operating handle, the lower end of the fixed rod is fixedly connected to the arc base, the lower end of the movable rod is connected to the cutting machine body, the upper ends of the fixed rod and the movable rod are hingedly connected by a hinge shaft, the cutting machine body is connected to the cutting machine fixing part by a hinge shaft, so that the cutting machine body can rotate at an angle relative to the cutting machine fixing part, and a reset spring is arranged between the cutting machine body and the cutting machine fixing part.

5. The slide rail type large diameter cast iron pipe ring cutting cutter according to claim 1 or 3, characterized in that: In the slide rail device (B), the split arc slide rail is composed of two cylindrical arc slide rail sections, namely, arc slide rail I (5) and arc slide rail II (8), both ends of the two arc slide rail sections are provided with lugs with bolt holes, and the connecting parts are connecting screw and nut I (7) and connecting screw and nut II (10), the connecting screw and nut are inserted into the bolt holes on two adjacent lugs and are locked and fixed by nuts; and / or, One of the split slide rail inner protective pads is composed of several inner protective pad blocks; and / or, The inner protective pad of the slide rail is completely distributed on the inner wall of the arc-shaped slide rail, or is arranged on part of the inner wall; and / or, The track pulley (4) is a pulley assembly, which is arranged on the arc-shaped base in such a way that a track pulley is arranged at each of the four corners of the arc-shaped base, wherein a braking device is arranged on the two track pulleys at the same end as the bracket; Alternatively, a pair of track pulleys is only provided at the end opposite to the bracket, and the end of the arc-shaped base where the bracket is provided is placed on the arc-shaped slide rail; and / or, The inner surface of the arc-shaped slide rail of each arc-shaped slide rail section is welded or padded with the slide rail inner pad.

6. The slide rail type large diameter cast iron pipe ring cutting cutter as claimed in claim 5, characterized in that: The diameter of the pulley in the pulley assembly located below the arc-shaped slide rail is not greater than the thickness of the inner pad of the slide rail; and / or, The diameter of the pulley located on the upper surface of the arc track in the pulley assembly is greater than the height of the lug.

7. The slide rail type large diameter cast iron pipe ring cutting cutter according to claim 4, characterized in that: The fixed connection structure between one end of the fixing rod and the arc-shaped base (3) of the cutting machine is a detachable connection structure; and / or, The movable rod and the cutting machine body are connected in a detachable manner.

8. The slide rail type large diameter cast iron pipe ring cutting cutter according to claim 4, characterized in that: The movable connection structure may be: the operating handle is hinged to the fixed rod through a hinge shaft; or, A vertical long slot is set on the fixed rod, and an operating handle is inserted in the vertical long slot. A hinge shaft passes through the two opposite side walls of the vertical long slot and is hinged to the rod section of the operating handle. One end of the operating handle is hinged to the middle part of the moving rod, and a handle is set at the other end.

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