CN110640797B

CN110640797B - Annular cutter for PE pipe

Info

Publication number: CN110640797B
Application number: CN201910914046.7A
Authority: CN
Inventors: 曾新凤
Original assignee: Chengdu Chuanlu Plastic Group Co ltd
Current assignee: CHENGDU CHUANLU PLASTIC GROUP Co.,Ltd.
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2021-09-07
Anticipated expiration: 2039-09-25
Also published as: CN110640797A

Abstract

The invention relates to the technical field of pipe cutting devices, and discloses an annular cutter for a PE pipe, which comprises the PE sample pipe, wherein a lower clamp plate is arranged at the bottom end of the PE sample pipe, an upper clamp plate is arranged inside the top end of the PE sample pipe, the middle part between the lower clamp plate and the upper clamp plate is movably and crossly connected through a rotating shaft, a sliding groove is arranged on the outer surface of one end of the lower clamp plate, a sliding block is movably sleeved outside the sliding groove, a movable joint is movably sleeved outside the sliding block, and a connecting rod is arranged at the bottom end of the movable joint. This an annular cutter for PE pipe, through the setting of sealing sleeve and piston, utilize the air of extrusion discharge sealing sleeve inner chamber bottom to utilize the circulation of the timely break-make sealing sleeve of activity valve and external air, make it form a negative pressure space in sealing sleeve, and then the relative position relation between air lower plate and the punch holder, so that the positional relation of control cutting blade in PE appearance pipe, its simple structure, convenient to use, stability are better.

Description

Annular cutter for PE pipe

Technical Field

The invention relates to the technical field of pipe cutting devices, in particular to an annular cutter for a PE pipe.

Background

The PE pipe is used as a novel water pipe material, and can be used as a cold pipe and a hot water pipe due to the characteristics of no toxicity, light weight, corrosion resistance and the like, so that the PE pipe is widely popularized, but the pressure resistance of the PE pipe is poor, and the PE pipe is manufactured by installing a certain size standard during production, so that the PE pipe is required to be cut according to the size of decoration when the water pipe is installed, and is welded with various accessories together by using a hot melting technology, so that the design of a water path pipeline is completed.

But present PE water pipe cutting all adopts dedicated water pipe cutting knife to cut, utilize pressure to extrude its bottom with the top of blade from the water pipe, thereby accomplish the cutting operation to the water pipe, however PE tubular product is relatively poor because of the resistance to pressure of material itself, the condition that the fracture appears in the incision department that very easily leads to the water pipe at the in-process of extrusion cutting, and then lead to the quality of incision relatively poor, the phenomenon of leaking appears after installing the water pipe, and it is great at the in-process pressure of extrusion cutting, lead to the incision of water pipe to appear extrusion deformation easily, at next step's hot melt welded in-process, lead to the quality of its interface relatively poor because of the inhomogeneity of hot melt, it is shorter to cause its life-span of use.

Disclosure of Invention

Technical problem to be solved

The invention provides an annular cutter for a PE pipe, which has the advantages of small pressure during cutting, high quality of a cut, no crack at the cut or extrusion deformation of the cut, high quality of a hot-melt joint and long service life, solves the problems that the existing PE pipe is cut by a special water pipe cutter, and the cutter blade is extruded from the top end of the water pipe to the bottom end of the water pipe by using pressure to finish the cutting operation of the water pipe, however, the PE pipe is easy to cause the crack at the cut of the water pipe during the extrusion cutting process due to poor pressure resistance of the material, further causes the poor quality of the cut, causes the water leakage phenomenon after the water pipe is installed, and easily causes the extrusion deformation of the cut of the water pipe due to high pressure during the extrusion cutting process, the quality of the interface is poor due to the non-uniformity of the hot melt, so that the service life of the interface is short.

(II) technical scheme

The invention provides the following technical scheme: the utility model provides an annular cutterbar for PE pipe, includes PE appearance pipe, the bottom of PE appearance pipe is equipped with the lower plate, the inside on PE appearance pipe top is equipped with the punch holder, and the middle part between lower plate and the punch holder is through pivot activity cross connection, and the surface of lower plate one end is equipped with the spout, the slider has been cup jointed in the outside activity of spout, the outside activity of slider has cup jointed the movable joint, and the bottom that the activity connects is equipped with the connecting rod, the bottom of connecting rod run through and extend to sealed telescopic inside and with the inside piston fixed connection of sealed sleeve, the outside one side of sealed sleeve and the one end fixed connection of punch holder, the outer wall of piston cup joints with sealed telescopic inner wall activity, and the bottom of piston is equipped with movable valve.

Preferably, the left end of lower plate is established to "U" type structure, and the one end of punch holder just in time is in the middle part of lower plate "U" type structure, and the bottom of punch holder is equipped with cutting blade simultaneously.

Preferably, the left ends of the upper clamping plate and the lower clamping plate are both designed to be arc-shaped structures, and the radian of the lower clamping plate is larger than that of the upper clamping plate.

Preferably, an elastic pressing sheet is arranged at the right end of the rotating shaft and between the lower clamping plate and the upper clamping plate, and the ratio of the vertical distance of the left end of the rotating shaft to the vertical distance of the right end of the rotating shaft is 1: 5.

(III) advantageous effects

The invention has the following beneficial effects:

1. this an annular cutter for PE pipe, setting through punch holder and cutting blade, when extrusion cutting blade deepens below the inner wall of PE appearance pipe, form annular cutting operation to PE appearance pipe through rotating this cutterbar, compare with current PE appearance pipe cutting means, utilize the mode of annular cutting, can effectually alleviate the pressure of exerting to it when cutting PE appearance pipe, thereby prevent to lead to its phenomenon of fracture to appear in the in-process of extrusion cutting because of the resistance to pressure of PE appearance pipe is relatively poor, avoided the in-process at the extrusion cutting simultaneously, the incision to PE appearance pipe causes extrusion deformation, and in the welded in-process of next step hot melt, interface quality because of its hot melt inhomogeneous and that lead to is relatively poor, the short problem of life.

2. This an annular cutter for PE pipe, through the setting of sealing sleeve and piston, utilize the air of extrusion discharge sealing sleeve inner chamber bottom to utilize the circulation of the timely break-make sealing sleeve of activity valve and external air, make it form a negative pressure space in sealing sleeve, and then the relative position relation between air lower plate and the punch holder, so that the positional relation of control cutting blade in PE appearance pipe, its simple structure, convenient to use, stability are better.

3. This an annular cutterbar for PE pipe, through the setting of spout, slider and activity joint, when the lower plate used the pivot to make circular motion as the center, can be timely effectual have curved motion orbit to convert linear motion and the vertical motion orbit of slider into with the right-hand member of lower plate to can drive the space of connecting the connecting rod compression sealing sleeve inner chamber bottom, and then utilize this cutterbar to accomplish the annular cutting operation to PE appearance pipe.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial top view of a lower jaw of the present invention construction;

FIG. 3 is an enlarged view of the point A in FIG. 1.

In the figure: 1. PE sample pipe; 2. a lower splint; 3. an upper splint; 4. a rotating shaft; 5. a chute; 6. a slider; 7. a movable joint; 8. connecting the connecting rod; 9. a sealing sleeve; 10. a piston; 11. a movable valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an annular cutter for a PE tube comprises a PE sample tube 1, a lower clamp plate 2 is disposed at a bottom end of the PE sample tube 1, an upper clamp plate 3 is disposed inside a top end of the PE sample tube 1, a middle portion between the lower clamp plate 2 and the upper clamp plate 3 is movably cross-connected through a rotating shaft 4, a sliding chute 5 is disposed on an outer surface of one end of the lower clamp plate 2, a sliding block 6 is movably sleeved on an outer portion of the sliding chute 5, a movable joint 7 is movably sleeved on an outer portion of the sliding block 6, a connecting rod 8 is disposed at a bottom end of the movable joint 7, a bottom end of the connecting rod 8 penetrates through and extends into an inner portion of a sealing sleeve 9 and is fixedly connected with a piston 10 inside the sealing sleeve 9, one side of the outer portion of the sealing sleeve 9 is fixedly connected with one end of the upper clamp plate 3, an outer wall of the piston 10 is movably sleeved with an inner wall of the sealing sleeve 9, and a movable air valve 11 is disposed at a bottom end of the piston 10.

Wherein, to the setting of piston 10, when lower plate 2 and punch holder 3 push down the shrink and prepare to cut the PE pipe, utilize piston 10 and movable valve 11 can stabilize the air of effectual discharge seal sleeve 9 inner chamber bottom, thereby when closing movable valve 11, make the atmospheric pressure of seal sleeve 9 inner chamber bottom less, and then drive the taut lower plate 2 of connecting rod 8 and punch holder 3, cause it to keep certain state always, guarantee that can not take place not hard up condition between lower plate 2 and the punch holder 3, and then keep this cutterbar to possess effectual cutting depth when annular cutting PE appearance pipe 1, the completion is to the cutting operation of PE appearance pipe 1.

Among this technical scheme, the left end of lower plate 2 is established to "U" type structure, and the one end of punch holder 3 just in time is in the middle part of lower plate 2 "U" type structure, and the bottom of punch holder 3 is equipped with cutting blade simultaneously.

Wherein, to the setting of lower plate 2 and PE appearance pipe 1 structure position, utilize the setting of "U" type structure in the lower plate 2, can provide stable support to the surface of PE appearance pipe 1, utilize simultaneously that the cooperation of lower plate 2 can be firm with PE appearance pipe 1 centre gripping in its middle part to guaranteed PE appearance pipe 1 at the in-process that the centre gripping supported, be in mutually perpendicular's state between PE appearance pipe 1 and this cutterbar, and then guaranteed the notched planarization of this cutterbar when cutting PE appearance pipe 1.

In this technical scheme, the arc structure is all established to the left end of punch holder 3 and lower plate 2, and the radian of lower plate 2 is greater than the radian of punch holder 3.

Wherein, to the setting of 2 left end radians of lower plate, make it when supporting the circular PE pipe of centre gripping, can all provide effectual blockking for the left and right sides of PE appearance pipe 1, make PE appearance pipe 1 relative slip's phenomenon can not appear when the atress, and to the setting of 3 left end radians of upper plate, be convenient for better cut into the inner wall of PE appearance pipe 1, when rotating this cutterbar simultaneously, make it have good cutting angle to PE appearance pipe 1, cause the efficiency of its cutting higher, and to the more level and smooth of the incision of PE appearance pipe 1, so that subsequent processing.

In the technical scheme, an elastic pressing sheet is arranged at the right end of the rotating shaft 4 and between the lower clamping plate 2 and the upper clamping plate 3, and the ratio of the vertical distance of the left end of the rotating shaft 4 to the vertical distance of the right end of the rotating shaft is 1: 5.

Wherein, to the setting of elasticity preforming between lower plate 2 and the punch holder 3 for this cutterbar has stable outside power of strutting between lower plate 2 and the punch holder 3 and opens lower plate 2 and punch holder 3 when opening movable valve 11, accomplishes that just quick opening lower plate 2 and punch holder 3 in a cutting rear, so that continue the cutting operation next time.

Wherein, to the setting of the ratio of the both ends vertical distance about pivot 4, use pivot 4 as the fulcrum and utilize lever principle for this cutterbar is comparatively laborsaving when pushing down the outer wall of cutting PE appearance pipe 1, has alleviateed staff's intensity of labour.

The use method and the working principle of the embodiment are as follows:

firstly, opening a movable air valve 11 to communicate external air with air at the bottom of an inner cavity of a sealing sleeve 9, so that the air pressure of the inner cavity at the upper side and the lower side of a piston 10 in the sealing sleeve 9 is the same, thereby driving a lower clamping plate 2 and an upper clamping plate 3 to be automatically opened under the elastic action of an elastic pressing sheet, then extending a PE sample tube 1 into the left ends of the lower clamping plate 2 and the upper clamping plate 3 and adjusting the PE sample tube to the size to be cut, then downwards extruding the lower clamping plate 2 and the upper clamping plate 3 at the right end, and under the action of the lever principle of a rotating shaft 4, continuously extruding and cutting the PE sample tube 1 until a cutting blade at the left end of the upper clamping plate 3 is deep into the inner wall of the PE sample tube 1, and simultaneously driving a connecting rod 8 to downwards move and utilizing the piston 10 to compress the air at the bottom of the inner cavity of the sealing sleeve 9 to be discharged out of the sealing sleeve 9 under the action of the driving the sliding block 6 to slide leftwards on a sliding groove 5 under the action of the connecting rod transmission of a movable joint 7, then, the movable air valve 11 is closed to cut off the communication between the air at the bottom of the inner cavity of the sealing sleeve 9 and the atmosphere, the lower clamping plate 2 and the upper clamping plate 3 are adsorbed under the action of air pressure, the lower clamping plate and the upper clamping plate are fixed at a certain position and cannot reset to move, meanwhile, the elastic pressing sheet is compressed to store certain elastic potential energy, then the device can be rotated to annularly cut the PE sample pipe 1, the cutting operation on the PE sample pipe 1 is completed after the PE sample pipe is rotated for a circle, then, the movable air valve 11 is opened again to repeat the steps, and the next cutting operation is continued.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A ring cutter for PE pipe, comprising a PE sample pipe (1), characterized in that: the bottom of the PE sample tube (1) is provided with a lower clamping plate (2), the inside of the top end of the PE sample tube (1) is provided with an upper clamping plate (3), the middle part between the lower clamping plate (2) and the upper clamping plate (3) is movably connected through a rotating shaft (4), the outer surface of one end of the lower clamping plate (2) is provided with a sliding chute (5), a sliding block (6) is sleeved on the outer part of the sliding chute (5), a movable joint (7) is sleeved on the outer part of the sliding block (6), a connecting rod (8) is arranged at the bottom end of the movable joint (7), the bottom end of the connecting rod (8) penetrates through and extends into the sealing sleeve (9) and is fixedly connected with a piston (10) inside the sealing sleeve (9), one side outside the sealing sleeve (9) is fixedly connected with one end of the upper clamping plate (3), the outer wall of the piston (10) is movably sleeved with the inner wall of the sealing sleeve (9), and the bottom end of the piston (10) is provided with a movable air valve (11);

the left end of the lower clamping plate (2) is of a U-shaped structure, one end of the upper clamping plate (3) is just positioned in the middle of the U-shaped structure of the lower clamping plate (2), and meanwhile, the bottom end of the upper clamping plate (3) is provided with a cutting blade;

the left ends of the upper clamping plate (3) and the lower clamping plate (2) are both provided with arc structures, and the radian of the lower clamping plate (2) is greater than that of the upper clamping plate (3);

an elastic pressing sheet is arranged at the right end of the rotating shaft (4) and between the lower clamping plate (2) and the upper clamping plate (3), and the ratio of the vertical distance of the left end of the rotating shaft (4) to the vertical distance of the right end of the rotating shaft is 1: 5.