CN103056438A

CN103056438A - Pipe cutter

Info

Publication number: CN103056438A
Application number: CN201210547987XA
Authority: CN
Inventors: 胡乃文; 于广滨; 丁永生
Original assignee: HARBIN TIANTAI TECHNOLOGY Co Ltd
Current assignee: HARBIN TIANTAI TECHNOLOGY Co Ltd
Priority date: 2013-02-06
Filing date: 2013-02-06
Publication date: 2013-04-24

Abstract

The invention relates to a pipe cutter. The pipe cutter comprises a cutter bar and a cutter rest, wherein the cutter bar is installed in a hollow cavity of a keeping sleeve and provided with a groove on the upper portion, a plate spring is connected with the keeping sleeve through a screw, a long and round through hole is arranged on the wall of the keeping sleeve between a left rolling bearing and a right rolling bearing, a spring is sleeved outside the keeping sleeve, a blind hole with threads is arranged on the right side of the cutter bar, a cutter rest leaning slope is arranged on the left side, the cutter rest leans against the cutter rest leaning slope, a round cutter is mounted on the cutter rest, and a cutter rest hook is arranged at the right end and connected with a plate spring hook arranged at the left end of the plate spring in a hooking mode. The pipe cutter is simple in structure and compact in structure, reasonable in design, capable of bearing large load, safe and reliable; cleaning operation is not needed due to scrap-free cutting, operating processes are reduced, no scrap scratches inner walls of pipes, the cutting quality is high, the service life is long, and high economic benefits are provided.

Description

Pipe cutter

Technical field

The present invention relates to a kind of cutter, particularly relate to a kind of pipe cutter for cutting off heat exchanger tube redundance on the heat exchanger.

Background technology

At present, domestic heating exchange device factory substantially all is the instrument that is pipe cutter with a kind of to the cut-out of the heat exchanger tube redundance behind the expanded joint in process of production, and its principle is to adopt special knife rest that lathe tool is fixed, finish the tube head task of cutting off by electric device again, the method belongs to bits processing, namely adopts the lathe tool cutter head to cut off, and forges a knife easily, cutter head easily generates heat, life-span is short, and smear metal scratches inside pipe wall easily, and cutting quality is poor.

Summary of the invention

The object of the invention is to overcome the weak point that exists in the above-mentioned technology, provide a kind of simple and compact for structure, reasonable in design, heat exchanger tube cuts off fast, the pipe cutter of chipless.

In order to achieve the above object, the technical solution used in the present invention is: comprise knife bar, knife rest, described knife bar is installed in the maintainance set middle cavity, top is provided with groove, flat spring is housed in the groove, flat spring is connected with maintainance set by screw, described maintainance set outer cover is equipped with the dynamic bearing that rolls left, right rolling bearing, dynamic bearing rolls left, have the Long Circle through hole on the maintainance set jacket wall between the right rolling bearing, outer cover is equipped with spring, the spring left end withstands on the shaft shoulder of maintainance set, right-hand member withstands on the alignment pin that is plugged in the knife bar, alignment pin crosses the Long Circle through hole, described maintainance set is also successively by the dynamic bearing that rolls left, right rolling bearing, the hole is packaged in the housing cavity with back-up ring, the housing left end outside is set with adjusting sleeve, and be fixed on the housing by holding screw, described knife bar right side also is provided with tapped blind hole, the left side is provided with knife rest and is abutted against the inclined-plane, knife rest is abutted against to be abutted against on the inclined-plane knife rest, described knife rest top is equipped with disc cutter, and right-hand member is provided with the knife rest hook, and the knife rest hook is linked up with the phase clasp joint with the flat spring that the flat spring left end is provided with, the described maintainance set left end outside also is set with positioning sleeve, and positioning sleeve is fixed on the maintainance set by the termination.

Advantage of the present invention is:

1. simple and compact for structure, reasonable in design, can bear larger load, safe and reliable;

2. the invention belongs to chipless and cut off, so do not need cleaning operation, reduced flow chart, chipless scratches inside pipe wall, and cutting quality is high;

3. long service life has higher economic benefit;

4. unique structural design makes installation, dismounting and the operation of blade extremely convenient and swift, high efficiency.

Description of drawings

Fig. 1 is sectional structure schematic diagram of the present invention;

Fig. 2 is maintainance set structural representation of the present invention;

Fig. 3 is cutter frame structure schematic diagram of the present invention;

Fig. 4 is the A-A cutaway view of Fig. 3;

Fig. 5 is circular knife structural representation of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.

By Fig. 1-Fig. 5 as can be known, the present invention includes knife bar 13, knife rest 2, described knife bar 13 is installed in maintainance set 5 middle cavities, top is provided with groove 15, flat spring 3 is housed in the groove 15, flat spring 3 is connected with maintainance set 5 by screw 9, described maintainance set 5 outer cover are equipped with the dynamic bearing 8 that rolls left, right rolling bearing 11, dynamic bearing 8 rolls left, have Long Circle through hole 25 on maintainance set 5 jacket walls between the right rolling bearing 11, outer cover is equipped with spring 10, spring 10 left ends withstand on the shaft shoulder 31 of maintainance set 5, right-hand member withstands on the alignment pin 16 that is plugged in the knife bar 13, alignment pin 16 crosses Long Circle through hole 25, described maintainance set 5 is also successively by the dynamic bearing 8 that rolls left, right rolling bearing 11, the hole is packaged in housing 17 cavitys with back-up ring 12, the housing 17 left ends outside is set with adjusting sleeve 6, and be fixed on the housing 17 by holding screw 7, described knife bar 13 right sides also are provided with tapped blind hole 14, the left side is provided with knife rest and is abutted against inclined-plane 18, knife rest is abutted against to be abutted against on the inclined-plane 18 knife rest 2, described knife rest 2 tops are equipped with disc cutter 1, right-hand member is provided with knife rest hook 19, knife rest hook 19 is linked up with 20 phase clasp joints with the flat spring that flat spring 3 left ends are provided with, the described maintainance set 5 left ends outside also is set with positioning sleeve 21, and positioning sleeve 21 is fixed on the maintainance set 5 by termination 23.

Described knife rest 2 tops are provided with open-topped axis hole 26, and axis hole 26 bottoms are provided with vertical groove 27, and two sides are respectively equipped with horizontal channel 28, and described axis hole 26 connects with the axle 30 of the shaft shoulder 29 both sides that disc cutter 1 is provided with.

The present invention is knife bar 13 maintainance set 5 inner chambers of packing into as shown in the figure, knife bar 13 tops have groove 15, flat spring 3 is housed in the groove 15, by screw 9 flat spring 3 and maintainance set 5 are connected as a single entity, the dynamic bearing 8 that rolls left, right rolling bearing 11 and spring 10 are equipped with in maintainance set 5 outsides, and are fixed on back-up ring 12 in the inner chamber of housing 17 by the hole, and alignment pin 16 penetrates knife bar 13, the two is connected as a single entity, and can slide in maintainance set 5 Long Circle through holes 25 localized areas.Knife bar 13 left end knife rests are abutted against mounting tool post 2 on the inclined-plane 18, circular knife 1 is installed in the open-topped axis hole 26 of knife rest 2, axis hole 26 bottoms of knife rest 2 are provided with vertical groove 27, two sides are respectively equipped with horizontal channel 28, effect is to make axis hole 26 have the elastic clamping function, knife rest 2 right-hand members and flat spring 3 left end clasp joints, the Long Circle through hole 25 that arranges on the maintainance set 5 can be controlled knife bar 13 axial displacements and maximum radial feeding size, thereby makes knife rest 2 finish vertical feed and cut off unnecessary tube head.Knife bar 13 right-hand members are provided with tapped blind hole 14, are connected with dynamical system by connector, make knife bar 13 produce rotation.

Enforcement of the present invention needs by electric hand drill as power, namely by jockey knife bar 13 is connected with electric hand drill, the present invention begins rotation after the energising, the operator inserts the present invention in the heat exchanger tube 22 of the need cutting that is fixed on the tube sheet 24, by adjusting sleeve 6 left side axial location, positioning sleeve 21 radial locations, knife bar 13 is abutted against band movable knife rack 2 motions under the effect of inclined-plane 18 and flat spring 3 at knife rest, thereby drive circular knife 1 and finish radial feed, simultaneously circular knife 1 reverse rotation, thus heat exchanger tube 22 cut off.After heat exchanger tube 22 cuts off, pull out knife bar 13, under the effect of spring 10, alignment pin 16 drives knife bar 13 and moves to right simultaneously, and knife rest 2 falls thereupon, sets back.

Claims

1. pipe cutter, comprise knife bar (13), knife rest (2), it is characterized in that: described knife bar (13) is installed in maintainance set (5) middle cavity, top is provided with groove (15), flat spring (3) is housed in the groove (15), flat spring (3) is connected with maintainance set (5) by screw (9), described maintainance set (5) outer cover is equipped with the dynamic bearing that rolls left (8), right rolling bearing (11), dynamic bearing (8) rolls left, have Long Circle through hole (25) on maintainance set (5) jacket wall between the right rolling bearing (11), outer cover is equipped with spring (10), spring (10) left end withstands on the shaft shoulder (31) of maintainance set (5), right-hand member withstands on the alignment pin (16) that is plugged in the knife bar (13), alignment pin (16) crosses Long Circle through hole (25), described maintainance set (5) is also successively by the dynamic bearing that rolls left (8), right rolling bearing (11), the hole is packaged in housing (17) cavity with back-up ring (12), housing (17) the left end outside is set with adjusting sleeve (6), and be fixed on the housing (17) by holding screw (7), described knife bar (13) right side also is provided with tapped blind hole (14), the left side is provided with knife rest and is abutted against inclined-plane (18), knife rest is abutted against to be abutted against on the inclined-plane (18) has knife rest (2), described knife rest (2) top is equipped with disc cutter (1), right-hand member is provided with knife rest hook (19), knife rest hook (19) is linked up with (20) phase clasp joint with the flat spring that flat spring (3) left end is provided with, described maintainance set (5) the left end outside also is set with positioning sleeve (21), and positioning sleeve (21) is fixed on the maintainance set (5) by termination (23).

2. pipe cutter according to claim 1, it is characterized in that: described knife rest (2) top is provided with open-topped axis hole (26), axis hole (26) bottom is provided with vertical groove (27), two sides are respectively equipped with horizontal channel (28), and described axis hole (26) connects with the axle (30) of the shaft shoulder (29) both sides that disc cutter (1) is provided with.