Polyurethane spraying polyethylene winding thermal insulation pipe end cutting device

Abstract

The utility model relates to a polyurethane spraying polyethylene winding thermal insulation pipe end cutting device in the technical field of thermal insulation pipe production, which comprises a pipeline transmission line and an end cutting machine, the end cutting machine comprises a base, a sliding platform, a lifting platform and a cutting box, a telescopic push rod is mounted in the middle of the base, and the telescopic end of the telescopic push rod is connected with the sliding platform; the lifting platform slidably penetrates through the sliding platform through a vertical sliding rod, a lifting ejector rod is installed in the middle of the sliding platform, and the lifting end of the lifting ejector rod is connected with the lifting platform; the cutting box is arranged above the lifting platform, a rotating shaft is rotationally arranged in the middle of the cutting box in a penetrating mode, a cutting motor is arranged in the cutting box, and a cutting saw blade is arranged on the rotating shaft and used for cutting the ends of the heat preservation pipes. The end cutting device can replace manual work to complete girdling stripping of an outer protective layer and a heat preservation layer of the end of the heat preservation pipe, work efficiency and safety are improved, and meanwhile the dust content in the environment can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heat preservation pipe production, and specifically relates to a polyurethane spraying polyethylene winding heat preservation pipe end cutting device. BACKGROUND

[0002] The heat preservation pipe is a common heat pipe, mainly composed of a working steel pipe, a heat preservation layer coated on the outer side of the working steel pipe and an outer protective layer wrapped on the outer side of the heat preservation layer. The polyurethane spraying polyethylene winding heat preservation pipe is a kind of heat pipe composed of a working steel pipe, a polyurethane heat preservation layer sprayed on the outer side of the working steel pipe and a polyethylene outer protective layer wound on the outer side of the polyurethane heat preservation layer. In the production process of the polyurethane spraying polyethylene winding heat preservation pipe, the full-pipe spraying polyurethane and winding polyethylene process mode is generally adopted. However, the butt joint at the two ends of the heat preservation pipe needs to be cut to expose a 15-20 cm wide bare end for end welding during the heat pipe laying construction. The end cutting of the prefabricated heat preservation pipe is generally processed before the pipe is delivered. The traditional end processing mode is to use an angle grinder to cut the outer protective layer and the heat preservation layer of the pipe in a ring shape. This mode has high labor intensity, low work efficiency, high labor cost, and the polyethylene and polyurethane dust generated during cutting is harmful to the health of workers. In addition, the use of the angle grinder also has certain safety risks. Therefore, it is urgent to design a heat preservation pipe end cutting device to reduce the labor intensity of individuals and improve the production efficiency and operation safety factor of the polyurethane spraying polyethylene winding heat preservation pipe. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the polyurethane spraying polyethylene winding heat preservation pipe end cutting device can completely replace manual cutting of the outer protective layer and the heat preservation layer of the heat preservation pipe end, which is beneficial to improving the work efficiency and safety factor of the heat preservation pipe production line.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] The polyurethane spraying polyethylene winding heat preservation pipe end cutting device comprises a pipe transmission line capable of realizing the circumferential rolling and axial transmission of the heat preservation pipe, and an end cutting machine for cutting and stripping the polyethylene outer protective layer and the polyurethane heat preservation layer of the heat preservation pipe end.

[0006] The end cutting machine comprises a base, a sliding platform, a lifting platform and a cutting box. According to the advancing direction of the heat preservation pipe, a straight guide rail is fixedly arranged on the upper left and right sides of the base along the front-rear direction. The sliding platform is slidably arranged on the upper sides of the two straight guide rails through the sliding blocks on the lower left and right sides. A telescopic push rod is fixedly installed on the upper middle part of the base along the front-rear direction. The telescopic end of the telescopic push rod is connected with the bottom of the sliding platform.

[0007] The left and right sides of the lifting platform are respectively slidably penetrated by vertical sliding rods, a lifting jack is vertically installed on the middle part of the upper side of the sliding platform, and the lifting end of the lifting jack is connected with the bottom of the lifting platform; the cutting box is fixedly arranged on the upper side of the lifting platform, a rotating shaft is rotatably arranged in the middle of the cutting box in the front-rear direction, a cutting motor is arranged in the cutting box, the rotating shaft is in transmission connection with the cutting motor, a circular cutting saw blade is coaxially fixed on the rotating shaft, the top serrated surface of the cutting saw blade is penetrated to the upper side of the upper cover plate of the cutting box, and the polyethylene outer protective layer and the polyurethane insulation layer at the bottom of the end of the heat preservation pipe are cut.

[0008] Further, the upper cover plate of the cutting box is an arc surface with a concave middle part, an installation through hole for the cutting saw blade to pass through is arranged in the arc surface in the left-right direction, and a movement gap is arranged between the installation through hole and the cutting saw blade, so that cutting debris can fall into the cutting box, a gas collecting cover is connected to the left side wall of the cutting box, a suction fan and a dust collector are arranged outside the end cutting machine, the air inlet end and the air outlet end of the suction fan are respectively connected to the gas collecting cover and the dust collector through flexible air pipes, and the cutting debris falling into the cutting box is sucked and sent to the dust collector for dust removal.

[0009] Further, the telescopic push rod and the lifting jack are both hydraulic cylinders, a hydraulic station is arranged outside the end cutting machine, the hydraulic station comprises an oil tank, an oil pump and a control valve group, and the hydraulic station is connected to the telescopic push rod and the lifting jack through the control valve group and a hydraulic oil pipeline.

[0010] Further, the front and rear ends of the rotating shaft are movably penetrated from the front and rear side walls of the cutting box, and the front and rear ends of the rotating shaft are rotatably connected to the upper side of the lifting platform through bearing seats.

[0011] Further, a driven wheel is coaxially arranged on the rotating shaft, a driving wheel is coaxially arranged on the output shaft of the cutting motor, and a transmission belt is wound between the driving wheel and the driven wheel.

[0012] Further, one support roller is arranged above each end of the upper cover plate of the cutting box, and the two support rollers are arranged at adjustable positions above the cutting box, the roller seat bottoms of the two support rollers are also arc surfaces matched with the upper cover plate, and adjustment long holes for bolt connection of the roller seats are arranged on the upper cover plate, so that the left-right positions of the support rollers can be adjusted to better adapt to heat preservation pipes with different diameters.

[0013] Further, a foundation screw is further arranged below the base for supporting the entire end cutting machine, and the base of the end cutting machine can be leveled and adjusted in height.

[0014] The utility model also includes other components that can make it normal use, all are the conventional means of the field, in addition, the device or component not added in the utility model, such as: pipeline transmission line, air extractor, dust catcher, hydraulic station etc., all adopt the prior art of the field.

[0015] The utility model has the advantages of the following:

[0016] The polyurethane spraying polyethylene winding heat preservation pipe end cutting device provided by the utility model can completely replace the traditional manual operation mode, well complete the ring cutting and stripping of the outer protective layer and the heat preservation layer of the heat preservation pipe, reduce the manual labor amount, save the labor cost, improve the heat preservation pipe production line work efficiency and operation safety, effectively reduce the polyurethane and polyethylene dust content in the air of the working environment, and help protect the health of workers. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a top view structural schematic diagram of the heat preservation pipe end cutting device in the embodiment.

[0018] Figure 2 It is Figure 1 a top view structural schematic diagram along line A-A. DETAILED DESCRIPTION

[0019] As Figures 1-2 shown, the polyurethane spraying polyethylene winding heat preservation pipe end cutting device comprises a pipeline transmission line 2 capable of realizing the circumferential rolling and axial conveying of the heat preservation pipe 1, the pipeline transmission line adopts a tire type pipeline conveying device very common in the heat preservation pipe production field, such as the spraying transmission line and winding transmission line disclosed in the patent document CN116872480B One variable-diameter polyurethane continuous spraying polyethylene winding heat preservation pipe production line and process, which belongs to the prior art of the field, and the specific setting is not described here, and an end cutting machine for cutting and stripping the polyethylene outer protective layer and the polyurethane heat preservation layer of the heat preservation pipe end.

[0020] The end cutting machine comprises a base 3, a sliding platform 4, a lifting platform 5 and a cutting box 6, according to the advancing direction of the heat preservation pipe, one linear guide rail 7 arranged in the front-rear direction is fixedly laid on the left and right sides above the base, the sliding platform is slidably arranged above the two linear guide rails through the sliding block 8 on the left and right sides below, the telescopic push rod 9 is fixedly installed on the base in the middle part above in the front-rear direction, and the telescopic end of the telescopic push rod is connected with the bottom of the sliding platform.

[0021] The left and right sides of the lifting platform are respectively slidably penetrated by vertical sliding rods 10, a sliding platform is arranged below the lifting platform, a lifting jack 11 is vertically arranged on the middle part of the sliding platform, and the lifting end of the lifting jack is connected with the bottom of the lifting platform; the cutting box is fixedly arranged above the lifting platform, a rotating shaft 12 is rotatably arranged in the middle of the cutting box in the front-rear direction, a cutting motor 13 is arranged in the cutting box, the rotating shaft is in transmission connection with the cutting motor, a circular cutting saw blade 14 is coaxially fixed on the rotating shaft, the top serrated surface of the cutting saw blade penetrates through the upper cover plate 15 of the cutting box, and the polyethylene outer protective layer and the polyurethane insulation layer at the bottom of the end of the heat preservation pipe are cut.

[0022] Specifically, the upper cover plate of the cutting box is an arc surface with a concave middle part, an installation through hole 16 for the cutting saw blade to pass through is arranged in the arc surface in the left-right direction, and a movable gap is arranged between the installation through hole and the cutting saw blade, so that cutting debris can fall into the cutting box, and dust generated in the cutting process can be sucked away. A gas collecting hood 17 is connected to the left side wall of the cutting box, a suction fan 18 and a dust collector 19 are arranged outside the end cutting machine, the suction fan is an axial flow fan, the dust collector is a pulse type bag dust collector, the air inlet end and the air outlet end of the suction fan are respectively connected with the gas collecting hood and the dust collector through flexible air pipes 20, respectively, for sucking and sending the cutting debris and dust falling during cutting to the dust collector for dust removal treatment. The flexible air pipe, the suction fan and the dust collector are all existing technologies, and will not be described in detail here.

[0023] Specifically, the telescopic push rod and the lifting jack are both hydraulic oil cylinders, a hydraulic station is arranged outside the end cutting machine, the hydraulic station includes an oil tank 21 for storing hydraulic oil, an oil pump 22 and a control valve group 23 arranged on the top of the oil tank, the hydraulic station is connected to the telescopic push rod and the lifting jack through the control valve group and a hydraulic oil pipeline 24, and the push-pull movement of the telescopic push rod and the lifting movement of the lifting jack can be realized through the control valve group. The hydraulic station and the hydraulic oil cylinder are both existing technologies, and will not be described in detail here.

[0024] Specifically, the front and rear ends of the rotating shaft are movably arranged out of the front and rear side walls of the cutting box, respectively, and the front and rear ends of the rotating shaft are rotatably connected with bearing seats 25, respectively, the bearing seat adopts a vertical outer spherical surface bearing with a seat, and the bearing seat is connected with the lifting platform through a connecting frame 26 below.

[0025] Specifically, a driven wheel 27 is coaxially arranged on the rotating shaft, a driving wheel 28 is coaxially arranged on the output shaft of the cutting motor, and a transmission belt 29 is wound between the driving wheel and the driven wheel.

[0026] Specifically, the upper cover plate of the cutting box is provided with a supporting roller 30 above each of the left and right ends, which is used to form a rolling support with the heat preservation tube; and the positions of the two supporting rollers above the cutting box can be adjusted, and the bottom of the roller seat of the two supporting rollers is also an arc surface matched with the upper cover plate, and the upper cover plate is provided with an adjusting long hole 31 for bolt connecting the roller seat, so that the positions of the supporting rollers can be adjusted to better adapt to heat preservation tubes with different diameters.

[0027] Specifically, the base is further provided with a foot screw 32 below for supporting the entire end cutting machine, so that the leveling and appropriate height adjustment of the base of the end cutting machine can be realized.

[0028] The working principle of the utility model is as follows:

[0029] The heat preservation tube is conveyed in a spiral manner on the pipeline transmission line, that is, it rolls circumferentially and moves axially, until the end part of the heat preservation tube is conveyed above the end cutting machine, the pipeline transmission line can control the axial movement speed of the heat preservation tube, and even can stop the axial movement, but at the same time, the circumferential rolling of the heat preservation tube can be continuously ensured; at this time, the lifting top rod 11 pushes the entire lifting platform 5 to slowly lift until the cutting saw blade 14 gradually contacts and cuts into the pipeline heat preservation layer, (before the end part of the heat preservation tube reaches above the end cutting machine, the lifting platform 5 is originally in a descending state, at this time, the cutting saw blade 14 installed on the lifting platform 5 cannot reach the lower surface of the heat preservation tube 1, so the cutting saw blade 14 will not interfere with the heat preservation tube 1); then, with the start of the rotation of the cutting saw blade, the cutting saw blade can gradually cut into the polyethylene outer protective layer and the polyurethane heat preservation layer of the end of the heat preservation tube, until it just reaches the outer surface of the working steel pipe, the cutting depth can be pre-adjusted by the lifting platform, and the cutting saw blade rotates and cuts on one side, and the sliding platform moves forward and backward and gradually extends and retracts on the other side, so that the cutting and peeling of the exposed end of the heat preservation tube with the required width can be completed.

[0030] The technical scheme of the utility model is not limited to the above specific embodiments, and many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modification made within the spirit and principles of the utility model falls within the protection scope of the utility model.

Claims

1. A polyurethane spray polyethylene winding heat preservation pipe end cutting device, comprising a pipe transmission line capable of realizing circumferential rolling and axial transmission of the heat preservation pipe, and an end cutting machine for cutting and stripping the polyethylene outer protective layer and the polyurethane heat preservation layer of the heat preservation pipe end, characterized in that: The end cutting machine comprises a base, a sliding platform, a lifting platform and a cutting box. Linear guides are fixed on the left and right sides of the base in the front-rear direction. The sliding platform is slidably arranged on the linear guides through the sliding blocks. A telescopic push rod is fixed on the base in the front-rear direction. The telescopic end of the telescopic push rod is connected to the bottom of the sliding platform. The lifting platform is slidably arranged on the sliding platform through the vertical sliding rods. A lifting jack is vertically arranged on the sliding platform. The lifting end of the lifting jack is connected to the bottom of the lifting platform. The cutting box is fixed on the lifting platform. A rotating shaft is rotatably arranged in the cutting box in the front-rear direction. A cutting motor is arranged in the cutting box. The rotating shaft is drivingly connected to the cutting motor. A circular cutting saw blade is coaxially arranged on the rotating shaft. The top serrated surface of the cutting saw blade is arranged above the upper cover plate of the cutting box for cutting the polyethylene outer protective layer and the polyurethane insulation layer of the end of the insulation pipe. ​ 2. The polyurethane spray polyethylene foam insulated pipe end cutout apparatus of claim 1, wherein: The upper cover plate of the cutting box is concave in the middle. An installation through hole is arranged in the arc surface in the left-right direction for the cutting saw blade to pass through. An active gap is arranged between the installation through hole and the cutting saw blade for the cutting debris to fall into the cutting box. A gas collecting cover is connected to the left side wall of the cutting box. An air extractor and a dust collector are arranged outside the end cutting machine. The air extractor and the dust collector are respectively connected to the gas collecting cover and the dust collector through the flexible air pipes for sucking the cutting debris falling into the cutting box and sending the cutting debris to the dust collector for dust removal.

3. The polyurethane spray polyethylene foam insulated pipe end cutout apparatus of claim 1, wherein: The telescopic push rod and the lifting jack are hydraulic cylinders. A hydraulic station is arranged outside the end cutting machine. The hydraulic station is connected to the telescopic push rod and the lifting jack through the control valve group and the hydraulic oil pipeline.

4. The polyurethane spray polyethylene foam insulated pipe end cut-out apparatus of claim 1, wherein: The front and rear ends of the rotating shaft are movably arranged on the front and rear side walls of the cutting box. The front and rear ends of the rotating shaft are rotatably connected to the lifting platform through the bearing seats.

5. The polyurethane spray polyethylene foam insulated pipe end cutout apparatus of claim 1, wherein: A driven wheel is coaxially arranged on the rotating shaft. A driving wheel is coaxially arranged on the output shaft of the cutting motor. The driving wheel and the driven wheel are cooperatively arranged around the transmission belt.

6. The polyurethane spray polyethylene foam insulated pipe end capping and cutting apparatus of claim 1, wherein: Support rollers are arranged above the left and right ends of the upper cover plate of the cutting box for rolling support of the insulation pipe.

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