CN201096239Y

CN201096239Y - Composite pipes enlarging rounding device

Info

Publication number: CN201096239Y
Application number: CNU2007201845068U
Authority: CN
Inventors: 王占奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-20
Filing date: 2007-10-20
Publication date: 2008-08-06
Anticipated expiration: 2017-10-20

Abstract

Disclosed is a clad tube flaring and smoothing device, pertaining to working tools. Current technology fails to flare a clad tube made of metal and plastic. The clad tube flaring and smoothing device comprises an expansion part which is a column structure formed by a plurality of expansion petals which bound through a binding piece; each expansion petal is composed of an external expansion side and an internal bearing side; the section of each external expansion side takes the shape of a circular arc, and the internal bearing sides develop into an expansion space; a shelve part extends out of the end of each expansion petal. The clad tube flaring and smoothing device also includes a bearing part to bear the shelve parts, and a power unit mainly comprising an expansion piece which is inserted into the expansion space. The end of the clad tube is hitched on the expansion part, then the expansion piece of the power unit is inserted into the expansion space; the expansion piece exerts force on the internal bearing sides of the expansion petals, making the expansion petals to be expanded; after that the external expansion sides of the expansion petals exert force on the inner wall of the clad tube to expand the end of the tube; since each external expansion side is provided with a circular arc section, the end of the clad tube is of good roundness after flaring.

Description

Composite pipe enlarging full circle device

The utility model belongs to working tool, specifically circular composite pipe is carried out the utensil of enlarging full circle.

In plumbing, air feed, chemical industry, in the piping erection of systems such as heating power, normally with the composite metal-plastic pipe of latus rectum (as aluminium-plastic composite pipe, it comprises the plastic layer and middle aluminium lamination of inner and outer surface layers) directly be connected with pipe fitting (joint), as notification number is that the utility model patent disclosed " thermofusible spigot pipe fitting " of CN2644848Y just belongs to such scheme, there is following defective in it: 1. because of the existence of internal ring wall, caused the position of composite pipe and pipe fitting welding to have tangible undergauge phenomenon, be the internal diameter of internal ring wall internal diameter less than composite pipe, cause the circulation bore of pipeline not consistent thus with the internal diameter of composite pipe, under the prerequisite that does not increase the composite pipe internal diameter, just reduced the flow of fluid; 2. certainly will cause the waste of material and the increase of cost by increasing the flow loss that the composite pipe internal diameter remedies fluid; Generation because of molten knurl during 3. isometrical welding causes between the fusion face and can not contact fully, so its welding quality is affected.

For this reason, the present technique field has proposed the port of composite metal-plastic pipe is enlarged the requirement that is connected with corresponding pipe fitting (joint) again after (becoming bell mouth shape as enlarging), yet, still find no enlarging device effect, convenient to use (perhaps flaring tool) at present.

The technical assignment of the technical problems to be solved in the utility model and proposition is for overcoming the defective that prior art is difficult to composite metal-plastic pipe is carried out enlarging, a kind of composite pipe enlarging full circle device being provided.For this reason, the utility model is taked following technological scheme:

Composite pipe enlarging full circle device is characterized in that comprising:

One enlarged portion, it is constrained to column by attaching means with several expansion lobes, and each expansion lobe has outer expansion face and interior bearing surface, and the sectional shape of each outer expansion face is circular-arc, bearing surface surrounds an expansive space in each, extends outward rest portion in the end of each expansion lobe;

One is used to carry the bearing part of described rest portion;

One power part, it mainly comprises an expanding body of inserting described expansive space.

This composite pipe enlarging full circle device, when enlarging is carried out in the composite pipe end, the composite pipe end is enclosed within on the enlarged portion, afterwards the expanding body of power part is inserted the expansive space between each expansion lobe, by expanding body act on the expansion lobe interior bearing surface on each the expansion lobe open, outer expansion face by the expansion lobe acts on the composite pipe inwall with the expansion of composite pipe end again, because the sectional shape of each outer expansion face is circular-arc, therefore the composite pipe end through enlarging has good circularity; After expansion finishes, expanding body is extracted in expansive space, each expansion lobe resets under the effect of attaching means, breaks away from the composite pipe inwall, can will take off easily on enlarged portion through the composite pipe of enlarging.

As the further of technique scheme improved and replenish, make the product structure that makes rationally reliable, can adopt following concrete technical measures:

Described outer expansion face is cylndrical surface or conical surface.The outer expansion face of two kinds of forms all can expand the good enlarging of circularity continuity.

Described outer expansion face is step-like and is distributed on the described expansion lobe, so each expansion lobe makes enlarged portion be rendered as segmented column structure when fitting together.This structure promptly can be carried out enlarging to the composite metal-plastic pipe of different-diameter by each step section, also can carry out gradual enlarging to the end of same composite pipe and (promptly earlier preliminary enlarging be carried out in the end of composite pipe by reduced diameter section by each step section, by big footpath section enlarging is once more carried out in the end of composite pipe afterwards, until the bore that is extended to requirement).

Described expanding body is round table-like, and the interior bearing surface of described expansion lobe is a conical surface.This structure is convenient to make expanding body to cooperate with the interior bearing surface of expansion lobe, and each expansion lobe is opened.

Described expanding body is the terrace with edge shape, and it has the terrace with edge side corresponding with the number of described expansion lobe, and the interior bearing surface of described expansion lobe is a clinoplain that the terrace with edge side is corresponding with expanding body.This structure is convenient to make expanding body to cooperate with the interior bearing surface of expansion lobe, each expansion lobe is opened, and in the open process of each expansion lobe, the terrace with edge side of expanding body is a plane contact with the interior bearing surface of expansion lobe, therefore be convenient to each expansion lobe is evenly opened along the terrace with edge side of expanding body, guarantee the circularity of enlarging.

Gap between the front end of described expanding body and the expansion lobe is greater than the rear end of expanding body and the gap between the expansion lobe.Concrete, the tapering on expanding body surface is realized greater than the tapering of interior bearing surface.This structure makes when each expansion lobe is opened, and makes the position of the open degree in position of the corresponding expanding body front end of expansion lobe less than corresponding expanding body rear end, therefore makes the composite pipe end expand into bell mouth shape.

Described bearing part has a matrix, offers the annular groove that is used to hold described each rest portion on this matrix.Thus, can easily enlarged portion and bearing part be assembled together, and the expansion lobe of being convenient to enlarged portion is expanded flexibly.

Described power part comprises a pair of effort handle that matches with described expanding body, this comprises first effort handle and second effort handle that is used to be connected described bearing part to effort handle, be connected with connecting rod between the two, and second effort handle has a pilot hole, described expanding body is extended a guide rod, this guide rod is located in the pilot hole of second effort handle, and the end of this guide rod is hinged on first effort handle.This structure is convenient to operation, and is easy to carry.

Described bearing part and second effort handle are by being threaded.It is simple in structure, is convenient to assembling.

Be provided with the adjusting bolt between described first effort handle and second effort handle.

Described attaching means is that a circular open is tightened spring, tightens groove on the described expansion lobe, and each expansion lobe is stuck in described inboard of tightening spring and is constrained on together by the groove of tightening on it.

The beneficial effects of the utility model are:

Can enlarge full circle in end easily and effectively with composite pipe, and easy to operate, be easy to carry; The coupled condition of composite pipe and pipe fitting for a change, reducing the undergauge phenomenon as far as possible provides reliable and effective operation to guarantee; Then can be able to excellent contact through the composite pipe end of enlarging full circle, thereby improve quality of connection with corresponding connection part on the pipe fitting.

Fig. 1 is a basic structure schematic representation of the present utility model.

Fig. 2 is that the K-K of Fig. 1 is to the cross section enlarged view.

View when Fig. 3 is opened for the expansion lobe of state shown in Figure 2.

Fig. 4 is the structural representation of a preferred embodiment of the present utility model.

Fig. 5 is the original state schematic representation of the composite pipe enlarging full circle device of structure shown in Figure 4 to the composite pipe enlarging.

Fig. 6 is the intermediateness schematic representation of the composite pipe enlarging full circle device of structure shown in Figure 4 to the composite pipe enlarging.

Among the figure:

1-enlarged portion, 11-expansion lobe, 11a-outer expansion face, 11b-interior bearing surface, 11c-rest portion, 11d-tighten groove, 12-attaching means (tightening spring), 13-expansive space, the interior bearing surface of β-expansion lobe and the angle of enlarged portion center line;

2-bearing part, 21-matrix, 21a-annular groove, 21b-nut;

3-power part, 31-expanding body, 31a-guide rod, 32-the first effort handle, 33-the second effort handle, 33a-pilot hole, 33b-outside thread, 34-connecting rod, 35-adjusting bolt, the front end of HEAD-expanding body, the rear end of END-expanding body, the angle of the surface of α-expanding body and expanding body center line;

4-composite pipe, the composite pipe end of 41-expansion.

Below in conjunction with Figure of description by several embodiments to the utility model to detailed explanation.

Embodiment one

As shown in Figure 1, this composite pipe enlarging full circle device comprises an enlarged portion 1, a bearing part 2, a power part 3:

Enlarged portion 1 is constrained to column by attaching means 12 with several expansion lobes 11, each expansion lobe 11 has outer expansion face youngster a and interior bearing surface 11b, the sectional shape of each outer expansion face 11a (camber line that forms is intersected with outer expansion face 11a in the plane that this sectional shape is promptly vertical with the center line of column enlarged portion 1) is circular-arc (seeing Fig. 2,3), bearing surface 11b surrounds an expansive space 13 in each, extends outward rest portion 11c in the end of each expansion lobe:

Bearing part 2 is used to carry described rest portion 11c, whole enlarged portion 1 can be fitted together with bearing part 2 thus, and bearing part 2 provides movable space for each expansion lobe 11 of enlarged portion 1: under nature, attaching means 12 constrains in each expansion lobe 11 together, and the rest portion 11c of each expansion lobe all is shelved on the bearing part 2, and when the expanding body 31 hereinafter addressed of expansion lobe 11 is opened, for each expansion lobe 11 provides towards periphery the direction of column enlarged portion center line (promptly away from) mobile position;

Power part 3, it mainly comprises an expanding body 31 of inserting expansive space 13.When this expanding body 31 is inserted expansive space 13, expansionary force is acted on the interior bearing surface 11b of expansion lobe 11 by its surface.

This composite pipe enlarging full circle device, when enlarging is carried out in composite pipe 4 ends (referring to Fig. 5,6), composite pipe 4 ends are enclosed within on the enlarged portion 1, afterwards the expanding body 31 of power part 3 is inserted the expansive space 13 between each expansion lobe 11, the interior bearing surface 11b that is acted on expansion lobe 11 by expanding body 31 upward opens each expansion lobe 11, acting on composite pipe 4 inwalls by the outer expansion face 11a that expands lobe 11 again enlarges the composite pipe end, because the sectional shape of each outer expansion face is circular-arc, therefore the composite pipe end through enlarging has good circularity; After expansion finishes, expanding body 31 is extracted in expansive space 13, each expansion lobe 11 resets under the effect of attaching means 12, breaks away from composite pipe 4 inwalls, can will take off easily on enlarged portion through the composite pipe 4 of enlarging.

Embodiment two

As shown in Figure 4, this composite pipe enlarging full circle device comprises an enlarged portion 1, a bearing part 2, a power part 3:

Enlarged portion 1 is constrained to column by attaching means 12 with six expansion lobes 11, each expansion lobe 11 has outer expansion face 11a and interior bearing surface 11b, the sectional shape of each outer expansion face 11a (camber line that forms is intersected with outer expansion face in the plane that this sectional shape is promptly vertical with the center line of column enlarged portion) is circular-arc (referring to Fig. 2,3), bearing surface 11b surrounds an expansive space 13 in each, extends outward rest portion 11c in the end of each expansion lobe 11; More specifically, described outer expansion face 11a is a conical surface, and is step-like and is distributed on the described expansion lobe 11, so their restrained enlarged portion that constrains in the segmented column structure that a time-out pie graph shows; The interior bearing surface 11b of described expansion lobe 11 is a conical surface; Described attaching means 12 is that a circular open is tightened spring, tightens groove 11d on the described expansion lobe 11, and each expansion lobe 11 is stuck in described inboard of tightening spring and is constrained on together by the groove 11c that tightens on it;

Bearing part 2 is used to carry described rest portion 11c, it has a matrix 21, this matrix 21 is provided with nut 21b and offers and is used to hold the annular groove 21a that each expands the rest portion 11c of lobe 11, this structure can be fitted together whole enlarged portion 1 with bearing part 2, and bearing part 2 provides movable space for each expansion lobe 11 of enlarged portion 1: under nature, the spring of tightening as attaching means 12 constrains in each expansion lobe 11 together, and the rest portion 11c of each expansion lobe 11 all is shelved on the bearing part 2, and when the expanding body 31 hereinafter addressed of expansion lobe 11 is opened, for each expansion lobe 11 provides towards periphery the direction of column enlarged portion center line (promptly away from) mobile position;

Power part 3, it comprises the expanding body 31 and a pair of effort handle that insert expansive space 13: expanding body 31 is for round table-like, its surperficial tapering (being the tangent value of the angle α of the surface of expanding body and expanding body 31 center lines) is greater than the tapering (the interior bearing surface 11b of expansion lobe and the tangent value of the angle β of enlarged portion 1 center line) of bearing surface 11b in described, thus the front end HEAD of expanding body 31 with expand gap between the lobe 11 greater than the rear end END of expanding body and expand gap between the lobe 11; This comprises first effort handle 32 and second effort handle 33 that is used to be connected bearing part 2 to effort handle, be connected with connecting rod 34 between the two, and second effort handle 33 has a pilot hole 33a, described expanding body 31 is extended a guide rod 31a, this guide rod 31a is located in the pilot hole 33a of second effort handle 33, the end of this guide rod 31a is hinged on first effort handle 32, and the position on every side of corresponding pilot hole 33a is provided with the outside thread 33b that is used to connect bearing part 2 on second effort handle 33; The power part 3 of this structure, can make expanding body 31 relative second effort handle 33 under the guiding of pilot hole 33a flexible by adjusting two angles between the effort handle, after on connecting, having the bearing part 2 of enlarged portion 1, can make in the expansive space 13 of expanding body 31 between each expansion lobe 11 flexible: when being inserted in the expansive space 13 each expansion lobe 11 is opened, when expansive space 13 contracts, each expansion lobe 11 is drawn in together by the spring of tightening as attaching means 12.In addition, at second effort handle, 33 adjusted bolts 35, this adjusting bolt is supported between first effort handle 32 and second effort handle 33,, prevents to expand undue expansion of lobe 11 and the mouth of pipe is too magnified or open broken in order to regulate the minimum angle between first effort handle 32 and second effort handle 33.

With above-mentioned composite pipe enlarging full circle device during to the composite pipe enlarging, composite pipe 4 ends are enclosed within (as Fig. 5) on the enlarged portion 1, afterwards with hand with two effort handles 32/33 to drawing in together, even expanding body 31 is inserted the expansive space 13 between each expansion lobe 11, the interior bearing surface 11b that is acted on expansion lobe 11 by expanding body 31 upward opens each expansion lobe 11, and then act on composite pipe 4 inwalls the composite pipe end is enlarged by the outer expansion face 11a of expansion lobe 11, because the sectional shape of each outer expansion face 11a is circular-arc, therefore the composite pipe end 41 through enlarging has good circularity, and enlarging is bell mouth shape, if enlarging is less, can use big footpath section to expand; After expansion finishes, with hand two effort handles 32/33 are opened, expanding body 31 is extracted in expansive space 13, each expansion lobe 11 resets under the effect of attaching means 12, breaks away from composite pipe 4 inwalls, can will take off easily on enlarged portion through the composite pipe 4 of enlarging; As required, the composite pipe end 41 that enlarges can also be enclosed within on the outer expansion face of bigger specification of enlarged portion and carry out enlarging once more, until the bore that is extended to requirement.

Other embodiments

Under above-mentioned two embodiments' prompting, can also be in the following ways when implementing:

The quantity of expansion lobe can be done suitable variation;

Expanding body can be the terrace with edge shape, and it is had and the corresponding terrace with edge side of number of expanding lobe, and the interior bearing surface of expansion lobe is made a clinoplain that the terrace with edge side is corresponding with expanding body;

Outer expansion face can also be the cylndrical surface;

Bearing part can also be connected with second effort handle as clamping in other way.

Claims

1, composite pipe enlarging full circle device is characterized in that comprising:

One enlarged portion (1), it is constrained to column by attaching means (12) with several expansion lobes (11), each expansion lobe (11) has outer expansion face (11a) and interior bearing surface (11b), the sectional shape of each outer expansion face (11a) is circular-arc, bearing surface (11b) surrounds an expansive space (13) in each, extends outward rest portion (11c) in the end of each expansion lobe (11);

One is used to carry the bearing part (2) of described rest portion (11c);

One power part (3), it mainly comprises an expanding body (31) of inserting described expansive space (13).

2, composite pipe enlarging full circle device according to claim 1 is characterized in that described outer expansion face (11a) is cylndrical surface or conical surface.

3, composite pipe enlarging full circle device according to claim 1 and 2 is characterized in that described outer expansion face (11a) is step-like and is distributed on the described expansion lobe (11).

4, composite pipe enlarging full circle device according to claim 1 is characterized in that described expanding body (31) for round table-like, and the interior bearing surface (11b) of described expansion lobe (11) is a conical surface.

5, composite pipe enlarging full circle device according to claim 1, it is characterized in that described expanding body (31) is the terrace with edge shape, it has the terrace with edge side corresponding with the number of described expansion lobe (11), and the interior bearing surface (11b) of described expansion lobe (11) is a clinoplain that the terrace with edge side is corresponding with expanding body (31).

6,, it is characterized in that the front end (HEAD) of described expanding body and the gap between expansion lobe (11) rear end (END) and the gap of expanding between the lobe (11) greater than expanding body according to claim 4 or 5 described composite pipe enlarging full circle devices; The tapering on described expanding body (31) surface is greater than the tapering of bearing surface (11B) in described.

7, composite pipe enlarging full circle device according to claim 1 is characterized in that described bearing part (2) has a matrix (21), offers the annular groove (21a) that is used to hold described each rest portion (11c) on this matrix (21).

8, according to claim 1 or 7 described composite pipe enlarging full circle devices, it is characterized in that described power part (3) comprises a pair of effort handle that matches with described expanding body (31), this comprises first effort handle (32) and second effort handle (33) that is used to be connected described bearing part (2) to effort handle, be connected with connecting rod (34) between the two, and second effort handle (33) has a pilot hole (33a); Described expanding body (31) is extended a guide rod (31a), and this guide rod (31a) is located in the pilot hole (33a) of second effort handle (33), and the end of this guide rod (31a) is hinged on first effort handle (32); Described bearing part (2) and second effort handle (33) are by being threaded.

9, composite pipe enlarging full circle device according to claim 8 is characterized in that being provided with between described first effort handle (32) and second effort handle (33) adjusting bolt (35).

10, according to claim 1,2,4,5 or 7 described composite pipe enlarging full circle devices, it is characterized in that described attaching means (12) is that a circular open is tightened spring, tighten groove (11d) on the described expansion lobe (11), each expansion lobe (11) is stuck in described inboard of tightening spring and is constrained on together by the groove (11d) of tightening on it.