CN213530503U

CN213530503U - Short pipe expanding device

Info

Publication number: CN213530503U
Application number: CN202021163202.5U
Authority: CN
Inventors: 欧阳育光; 周建程; 陈伟朝; 覃枢宇; 张吉东; 孔健彬
Original assignee: Guangzhou Weihua Energy Saving Equipment Co ltd
Current assignee: Guangzhou Weihua Energy Saving Equipment Co ltd
Priority date: 2020-06-20
Filing date: 2020-06-20
Publication date: 2021-06-25
Anticipated expiration: 2030-06-20

Abstract

The utility model provides a nozzle stub expand tube device, it includes base, push mechanism, pull rod, fixed plate and a plurality of activity bloated piece, the base is hollow cylindric, the fixed plate is fixed in the base, push mechanism sets up in the base and with fixed plate fixed connection, a plurality of activities are bloated the piece and are set up the upper end of base, each the activity is bloated the piece including protruding piece, a plurality of activities are bloated the piece butt of each other and are made its protruding piece cooperation form cylindric movable part, the pull rod passes in proper order the movable part with the base with push mechanism can dismantle the connection, push mechanism drives the back and forth movement is done to the pull rod. The utility model provides a nozzle stub pipe expand tube device is through setting up a plurality of activities bloated piece, pull rod and push mechanism to establish the nozzle stub pipe of establishing on a plurality of activities bloated piece and outwards strut, reach the purpose of expand tube. The short pipe expanding device of the utility model has simple structure and convenient operation.

Description

Short pipe expanding device

Technical Field

The utility model belongs to the technical field of water pipe equipment technique and specifically relates to a nozzle stub tube expander device is related to.

Background

With the increasing living standard of people, the water heater enters more and more families, and the most used water heater is the electric water heater, which has the advantages of quick heating, simple installation and convenient use, and is popular with consumers. In the production and manufacturing process of a water heater, a metal water pipe with a short length is often used, but the diameter of the metal water pipe is fixed because the metal water pipe belongs to an industrial standard part, and when a short pipe is used in the water heater for connection, the short pipe is possibly not matched with the diameter of other devices, and at the moment, the short pipe needs to be expanded. The existing pipe expanding equipment is complex in structure and complex in operation.

Therefore, it is desirable to provide a short tube expansion device with simple structure and operation.

SUMMERY OF THE UTILITY MODEL

Therefore, a short tube expanding device with simple structure and operation is needed.

The utility model provides a nozzle stub expand tube device, it includes base, push mechanism, pull rod, fixed plate and a plurality of activity bloated piece, the base is hollow cylindric, the upper cover plate of base is provided with the through-hole, the fixed plate is fixed in the base, can be through welded fastening connection, also can be through fixed connection such as nail, screw. The pushing mechanism is arranged in the base and fixedly connected with the fixing plate, and the pushing mechanism can be fixedly connected with the fixing plate through welding or screws. The movable expansion blocks are arranged at the upper end of the base, namely the movable expansion blocks are placed on the upper cover plate of the base. Each movable expansion block comprises a convex block, the plurality of movable expansion blocks are mutually abutted to enable the convex blocks to be matched to form a cylindrical movable part, and the short pipe is sleeved in the movable part in actual use. The pull rod passes in proper order the movable part with the base with push mechanism can dismantle the connection, the pull rod with push mechanism can pass through threaded connection, push mechanism drives the back and forth movement is to the pull rod. When the pushing mechanism drives the pull rod to move downwards, the pull rod presses the movable part to enable the movable part to move outwards, so that expansion force is generated on the short pipe from the inside of the short pipe to the outside of the short pipe, and the purpose of pipe expansion is achieved; when the diameter of the short pipe meets the requirement, the pushing mechanism drives the pull rod to move upwards, the short pipe stops generating expansion force, and the expanded short pipe can be taken out after the pull rod is detached. The short pipe expanding device is simple to operate.

Preferably, the short pipe expanding device further comprises an expanding block retainer ring, wherein the expanding block retainer ring is arranged above the plurality of movable expanding blocks and is fixedly connected with the base, so that the movable expanding blocks move between the movable expanding blocks and the base. The expansion block retainer ring can limit the movement range of the movable expansion blocks, and simultaneously ensures that the movable expansion blocks cannot pop up or be misplaced from the expansion block retainer ring in the movement process.

Further preferably, the diameters of the plurality of movable expansion blocks after being abutted are smaller than the diameters of the expansion block retaining rings, namely when the plurality of movable expansion blocks are abutted and closed, a certain distance exists between the other ends of the movable expansion blocks and the expansion block retaining rings, the distance is the distance which can be outwards moved by the movable expansion blocks, and the plurality of movable expansion blocks take the pull rod as a circle center to do reciprocating motion to the periphery. Therefore, the limit movement distance of the plurality of movable expansion blocks can be controlled, and the limit size of the expansion pipe is controlled.

Preferably, the pushing mechanism further comprises a connecting rod, the connecting rod penetrates through the fixing plate and is detachably connected with the pull rod, the connecting rod and the pull rod can be in threaded connection, and the connecting rod drives the pull rod to move back and forth.

Preferably, the pull rod presses the plurality of the convex blocks when moving downwards so as to drive the plurality of movable expansion blocks to move around, so that an expansion force is generated on the short pipe sleeved on the convex blocks, and the purpose of expanding the pipe is achieved.

Preferably, the diameter of the pull rod is reduced from top to bottom, that is, the pull rod may be a circular truncated cone shape or a polygonal column shape with the diameter reduced from top to bottom, so that when the pull rod moves downwards, the diameter of the contact part of the pull rod and the movable part is gradually increased, and the movable part generates outward expansion force due to the increased diameter. The surface of the pull rod is uneven, and convex edges or concave lines can be arranged, so that the friction force on the surface of the pull rod is increased, and the pull rod is easier to disassemble.

Preferably, the top end of the pull rod is provided with one or more counter bores, the counter bores can be inner hexagonal threaded holes and inner star-shaped threaded holes, and the pull rod can be rapidly disassembled by matching with tools such as a wrench and a screwdriver.

The utility model provides a nozzle stub tube expand tube device is through setting up a plurality of activities bloated piece, pull rod and push mechanism, thereby push mechanism drives pull rod downstream oppresses a plurality of activities bloated piece, makes a plurality of activities bloated piece to the motion all around to establish the nozzle stub tube that overlaps on a plurality of activities bloated piece and outwards strut, reach the purpose of expand tube. The short pipe expanding device of the utility model has simple structure and convenient operation.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a perspective view of a short tube expansion device provided in the embodiment of the present invention.

Fig. 2 is a cross-sectional view of a short tube expansion device provided by the embodiment of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic structural diagram of a single movable expansion block according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the present invention, the present invention will now be described more fully with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, an embodiment of the present invention provides a short tube 6 expansion device, which includes a base 1, a pushing mechanism 3, a pull rod 2, a fixing plate 4 and a plurality of movable expansion blocks 5, wherein the base 1 is a hollow cylinder, an upper cover plate of the base 1 is provided with a through hole (not specifically identified in the drawings), and the base 1 may be made of a metal material, such as cast iron, stainless steel, and other alloys. The fixing plate 4 is fixed in the base 1 and can be fixedly connected by welding or by fixing with nails, screws and the like. The pushing mechanism 3 is arranged in the base 1 and fixedly connected with the fixing plate 4, and the pushing mechanism 3 can be fixedly connected with the fixing plate 4 through welding or screws. The pushing mechanism 3 is a mechanism for providing pulling force, such as a hydraulic cylinder, an air cylinder or an electric motor. A plurality of movable blooms 5 are arranged at the upper end of the base 1, namely, the plurality of movable blooms 5 are placed on the upper cover plate of the base 1. Each movable expansion block 5 comprises a convex block 501, the convex blocks 501 are mutually abutted to form a cylindrical movable part (not specifically identified in the figure) by matching the plurality of movable expansion blocks 5, and the short pipe 6 is sleeved in the movable part in actual use. The pull rod 2 sequentially penetrates through the movable part and the base 1 to be detachably connected with the pushing mechanism 3, the pull rod 2 and the pushing mechanism 3 can be connected through threads, and the pushing mechanism 3 drives the pull rod 2 to move back and forth. When the pushing mechanism 3 drives the pull rod 2 to move downwards, the pull rod 2 presses the movable part to enable the movable part to move outwards, so that expansion force is generated on the short pipe 6 from the inside of the pipe to the outside of the pipe, and the purpose of pipe expansion is achieved; when the diameter of the short pipe 6 meets the requirement, the pushing mechanism 3 drives the pull rod 2 to move upwards, the short pipe 6 stops generating expansion force, and the expanded short pipe 6 can be taken out after the pull rod 2 is detached. The short pipe 6 pipe expanding device is simple to operate.

In other preferred embodiments, the base 1 may have other shapes, such as a polygonal prism. The base 1 plays a role of supporting other parts, and the shape of the base 1 can be set according to actual working conditions.

Referring to fig. 1 and 2, in a preferred embodiment, the pipe expanding device of the short pipe 6 further comprises an expanding block retainer 7, wherein the expanding block retainer 7 is arranged above the plurality of movable expanding blocks 5 and is fixedly connected with the base 1, so that the movable expanding blocks 5 move between the expanding block retainer 7 and the base 1. The bulge block 501 of the movable bulge block 5 extends out of the bulge block retainer ring 7, the bulge blocks 501 are abutted and matched to form a movable part, and when the expansion pipe is in actual use, the short pipe 6 of the expansion pipe is sleeved on the movable part. The expansion block retainer ring 7 can limit the movement range of the plurality of movable expansion blocks 5, and simultaneously, the plurality of movable expansion blocks 5 can not pop up or be misplaced from the expansion block retainer ring 7 in the movement process.

Referring to fig. 2, in a further preferred embodiment, the abutted diameter of the plurality of movable expansion blocks 5 is smaller than the diameter of the expansion block retaining ring 7, that is, when the plurality of movable expansion blocks 5 abut and approach, a certain distance is formed between the other end of the movable expansion block 5 and the expansion block retaining ring 7, the distance is a distance that the movable expansion block 5 can move outward, and the plurality of movable expansion blocks 5 reciprocate around the pull rod 2 as a center of circle. In this way, the limit movement distance of the movable expansion blocks 5 can be controlled, so that the limit size of the expansion pipe is controlled.

Referring to fig. 2 and 3, in a preferred embodiment, the pushing mechanism 3 further includes a connecting rod 8, the connecting rod 8 passes through the fixing plate 4 and is detachably connected to the pull rod 2, the connecting rod 8 and the pull rod 2 can be connected by a screw thread, and the connecting rod 8 drives the pull rod 2 to reciprocate.

Referring to fig. 1-4, in a further preferred embodiment, when the pull rod 2 moves downward, the plurality of protrusions 501 are pressed to drive the plurality of movable expansion blocks 5 to move around, so as to generate an expansion force on the short pipe 6 sleeved on the protrusions 501, thereby achieving the purpose of expanding the pipe.

Referring to fig. 1-3, in a preferred embodiment, the diameter of the pull rod 2 decreases from top to bottom, i.e. the pull rod 2 may be a circular truncated cone or a polygonal prism with a diameter decreasing from top to bottom, such that when the pull rod 2 moves downward, the diameter of the contact portion of the pull rod 2 and the movable portion gradually increases, and an outward expansion force is generated to the movable portion due to the increased diameter. The surface of the pull rod 2 is uneven, and convex edges or concave lines can be arranged, so that the friction force on the surface of the pull rod 2 is increased, and the pull rod 2 is easier to disassemble.

Referring to fig. 1, in a preferred embodiment, one or more counter bores 201 are disposed at the top end of the pull rod 2, and the counter bores 201 may be an inner hexagonal threaded hole, an inner star-shaped threaded hole, or the like, and may be matched with a wrench, a screwdriver, or other tools to achieve quick detachment of the pull rod 2.

The embodiment of the utility model provides a still provide the application method of 6 expand tubes devices of nozzle stub: place this 6 expand tube devices of nozzle stub on level land or operation panel, rotating pull rod 2 makes it dismantle from connecting rod 8, then will treat 6 covers of nozzle stub of expand tube and establish into among the movable part that a plurality of protruding pieces 501 cooperation formed, then connect connecting rod 8 with pull rod 2, and start push mechanism 3, thereby push mechanism 3 drives 2 downstream of pull rod and produces the expansion force to nozzle stub 6, when the diameter of nozzle stub 6 reaches the requirement, can stop push mechanism 3, and drive 2 upward movements of pull rod, can take out nozzle stub 6 after dismantling pull rod 2, so repetitive operation can the expand tube process.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express the specific embodiments of the utility model, and the description thereof is specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a nozzle stub expand tube device, its characterized in that, includes base, pushing mechanism, pull rod, fixed plate and a plurality of activity bloated piece, the base is hollow cylindric, the fixed plate is fixed in the base, pushing mechanism sets up in the base and with fixed plate fixed connection, a plurality of activities bloated piece set up the upper end of base, each the activity bloated piece is including protruding piece, a plurality of activities bloated piece butt each other makes its protruding piece cooperation form cylindric movable part, the pull rod passes in proper order the movable part with the base with pushing mechanism can dismantle the connection, pushing mechanism drives the pull rod is to come and go.

2. A short tube expansion device according to claim 1, further comprising an expansion block retainer ring, wherein the expansion block retainer ring is providedIn thatThe movable expansion blocks are fixedly connected with the base above the movable expansion blocks, so that the movable expansion blocks move between the movable expansion blocks and the base.

3. A short tube expansion device according to claim 2, wherein the diameters of the movable expansion blocks after abutting are smaller than the diameter of the expansion block retainer ring, and the movable expansion blocks reciprocate around the pull rod as a center of circle.

4. A short tube expansion device according to claim 1, wherein the pushing mechanism further comprises a connecting rod, the connecting rod passes through the fixing plate and is detachably connected with the pull rod, and the connecting rod drives the pull rod to reciprocate.

5. A short pipe expander as claimed in claim 4, wherein said pull rod is adapted to urge said plurality of bumps upon downward movement of said pull rod to thereby move said plurality of movable bumps circumferentially.

6. A short pipe expansion device as claimed in claim 1, wherein said tie rod is reduced in diameter from top to bottom, and the surface of said tie rod is rugged.

7. A short pipe expander as claimed in claim 1, in which the top end of said tension rod is provided with one or more counter bores.