CN219253902U

CN219253902U - Hydraulic expansion structure

Info

Publication number: CN219253902U
Application number: CN202320620608.9U
Authority: CN
Inventors: 乔云琴; 江毅; 何丰
Original assignee: Wenling Gelante Cooling Equipment Co ltd
Current assignee: Wenling Gelante Cooling Equipment Co ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-06-27
Anticipated expiration: 2033-03-21

Abstract

The application relates to a hydraulic expansion structure, it includes the barrel, the pneumatic cylinder, the lid, core and expansion rod, the one end of barrel is connected in the cylinder body of pneumatic cylinder, the other end of barrel is connected in the lid, the barrel is equipped with and holds the chamber, hold the chamber and follow the axial extension of barrel, the piston rod of pneumatic cylinder is connected in the core, the core is located and is held the intracavity, the lid is equipped with the mounting groove towards the one end of barrel, the tank bottom of mounting groove is equipped with the mounting hole, the mounting groove communicates in the mounting hole, the axis of mounting hole and the axis collineation of core, the one end of expansion rod is inlayed in the mounting groove, the other end of expansion rod stretches out the mounting hole, the expansion rod is equipped with a plurality of, a plurality of expansion rods surround into the expansion mouth around the axis even interval of mounting hole, the core is used for stretching into the expansion mouth. When in expansion joint, the expansion rod stretches into the pipeline, the piston rod of the hydraulic cylinder pushes the core body to stretch into the expansion port, the expansion rod expands to enable the pipeline to be subjected to plastic deformation, the operation is simple and convenient, and the expansion joint efficiency is improved.

Description

Hydraulic expansion structure

Technical Field

The present application relates to the field of tube expanders, and in particular to a hydraulic expansion structure.

Background

The expansion joint is to extrude the end of the pipe extending into the hole of the pipe plate by using the pipe expander, so that the pipe end is plastically deformed, the pipe plate hole is elastically deformed at the same time, and after the pipe expander is taken out, the pipe plate hole is elastically contracted, and a certain extrusion pressure is generated between the pipe plate and the pipe, so that the pipe plate and the pipe are tightly stuck together, thereby achieving the aim of sealing, fastening and connecting.

The heat exchange tube is connected with the tube plate by expansion joint, welding and expansion welding, and the expansion joint method can be divided into mechanical expansion joint, hydraulic expansion joint, rubber expansion joint, explosion expansion joint and other methods. The mechanical expansion joint method is widely adopted by domestic enterprises, and has high labor intensity and low working efficiency. When the tube plate exceeds 100mm, the heat exchanger cannot realize full-thickness expansion joint, indexes such as actual tube expansion rate, pull-out force and sealing pressure are not directly related, an operator mainly determines the expansion joint degree according to experience, and the expansion joint efficiency is greatly influenced by human factors.

Disclosure of Invention

In order to improve expansion efficiency, the present application provides a hydraulic expansion structure.

The hydraulic expansion structure adopts the following technical scheme:

the utility model provides a hydraulic expansion structure, includes barrel, pneumatic cylinder, lid, core and expansion rod, the one end of barrel is connected in the cylinder body of pneumatic cylinder, the other end of barrel is connected in the lid, the barrel is equipped with and holds the chamber, hold the axial extension of chamber along the barrel, the piston rod of pneumatic cylinder is connected in the core, the core is located and is held the intracavity, the one end that the lid was faced the barrel is equipped with the mounting groove, the tank bottom of mounting groove is equipped with the mounting hole, the mounting groove communicates in the mounting hole, the axis of mounting hole and the axis collineation of core, the one end of expansion rod is inlayed in the mounting groove, the other end of expansion rod stretches out the mounting hole, the expansion rod is equipped with a plurality ofly the expansion rod is around the axis even interval setting of mounting hole, a plurality of expansion rod is enclosed into and is expanded the mouth, the coaxial setting of expansion mouth and core, the core is used for stretching into to expand the intraductal control expansion rod of expansion.

Through adopting above-mentioned technical scheme, during the expansion joint, stretch into the pipeline with the extension rod, the piston rod of pneumatic cylinder promotes the core and stretches into in the expansion mouth, and the extension rod expansion makes the pipeline take place plastic deformation, and tube sheet mouth takes place elastic deformation, easy and simple to handle has improved expansion joint efficiency.

Preferably, the telescopic rod of the hydraulic cylinder is provided with a positioning groove at one end in the accommodating cavity, a bump is arranged at one end of the core body, and the bump is embedded in the positioning groove.

Through adopting above-mentioned technical scheme, in the lug embedding constant head tank, be convenient for assemble the core on the telescopic link, the telescopic link slides and promotes the core slip, realizes expanding the joint to the pipeline.

Preferably, the positioning device further comprises a bolt, the protruding block is provided with a through hole, the groove wall of the positioning groove is provided with a bolt hole, and the bolt penetrates through the bolt hole and then stretches into the through hole.

Through adopting above-mentioned technical scheme, the bolt makes lug and telescopic link connect firmly for the core is difficult for coming off from the telescopic link, and convenient to detach changes.

Preferably, the outer diameter of the core decreases with distance from the telescopic rod of the hydraulic cylinder.

Through adopting above-mentioned technical scheme, the core is kept away from the one end external diameter of telescopic link less, and the core of being convenient for stretches into in the expansion mouth, has improved expansion joint efficiency.

Preferably, the telescopic rod of the hydraulic cylinder is connected to the inner wall of the through hole in a sliding mode, and the inner wall of the cylinder body is connected to the outer wall of the fixed block in a threaded mode.

Through adopting above-mentioned technical scheme, wear the mouth and protect the telescopic link, and the inner wall threaded connection of barrel is in the outer wall of fixed block for barrel convenient to detach, the distance of core and installing port can be adjusted, is applicable to the body expansion joint of different length.

Preferably, the hydraulic cylinder further comprises a ring body, wherein the ring body is arranged between the cylinder body and the cylinder body of the hydraulic cylinder, and the inner wall of the ring body is in threaded connection with the outer wall of the fixed block.

Through adopting above-mentioned scheme, the ring body is located between barrel and the cylinder body of pneumatic cylinder, reduces barrel and pneumatic cylinder body direct contact wearing and tearing, extension barrel and the life of pneumatic cylinder body.

Preferably, the periphery of the ring body is connected with an abutting block.

Through adopting above-mentioned technical scheme, the contact area of operating personnel and ring body has been increased to the butt piece, and the butt piece makes the ring body be convenient for atress, and the butt piece makes operating personnel be convenient for control ring body rotate, and then control barrel removes.

Preferably, the hydraulic cylinder further comprises a clamping ring, wherein the clamping ring is connected to one end of the cylinder body far away from the hydraulic cylinder body, and the inner wall of the mounting groove is connected to the outer wall of the clamping ring through threads.

Through adopting above-mentioned technical scheme, convenient to detach lid, be convenient for change the expansion rod, extension hydraulic expansion structure's life.

Preferably, the expansion rod comprises a clamping block and a rod body, wherein the clamping block is connected to one end of the rod body, the clamping block is connected to the bottom of the mounting groove, and the rod body extends into the mounting opening.

Through adopting above-mentioned technical scheme, the fixture block makes the extension rod be difficult for following the installing port and drops.

Preferably, one end of the rod body, which faces the axis of the mounting opening, is provided with an arc surface, and the arc surface is used for the abutting connection of the periphery of the core body.

Through adopting above-mentioned technical scheme, core butt cambered surface makes the body of rod expansion, and the core is difficult for wearing and tearing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when in expansion joint, the expansion rod extends into the pipeline, the piston rod of the hydraulic cylinder pushes the core body to extend into the expansion port, the expansion rod expands to enable the pipeline to be plastically deformed, the tube plate port is elastically deformed, the operation is simple and convenient, and the expansion joint efficiency is improved;

2. the bolt ensures that the lug is firmly connected with the telescopic rod, so that the core body is not easy to fall off from the telescopic rod, and the disassembly and the replacement are convenient;

3. the contact area of operating personnel and ring body has been increased to the butt piece, and the butt piece makes the ring body be convenient for atress, and the butt piece makes operating personnel be convenient for control ring body rotate, and then control barrel removes.

Drawings

Fig. 1 is a schematic view of the overall structure of a hydraulic expansion structure.

Fig. 2 is a cross-sectional view of a hydraulic expansion structure.

Fig. 3 is a schematic view of the overall structure of the hydraulic cylinder, the fixed block, the ring body, the core body and the latch.

Reference numerals illustrate: 1. a hydraulic cylinder; 11. a positioning groove; 111. a pin opening; 2. a fixed block; 21. a through hole; 3. a cylinder; 31. a receiving chamber; 4. a ring body; 41. an abutment block; 5. a core; 51. a bump; 511. a through port; 6. a plug pin; 7. a clasp; 8. a cover body; 81. a mounting groove; 82. a mounting port; 9. an expansion rod; 91. a clamping block; 92. a rod body; 93. expanding the mouth.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a hydraulic expansion structure. Referring to fig. 1 and 2, the hydraulic expansion structure includes a hydraulic cylinder 1, a fixed block 2, a cylinder body 3, a ring body 4, a core body 5, a plug 6, a snap ring 7, a cover 8, and an expansion rod 9.

Referring to fig. 2, a fixed block 2 is fixedly connected to one end of a cylinder body of a hydraulic cylinder 1, the fixed block 2 is provided with a through hole 21, the through hole 21 is coaxially arranged with a telescopic rod of the hydraulic cylinder 1, the telescopic rod of the hydraulic cylinder 1 is slidably connected to the inner wall of the through hole 21, and the outer diameter of the telescopic rod of the hydraulic cylinder 1 is equal to the inner diameter of the through hole 21.

The periphery of fixed block 2 is equipped with the external screw thread, and barrel 3 is equipped with holds chamber 31, holds chamber 31 and runs through barrel 3 along the axial of barrel 3 extension, and the inner periphery of barrel 3 is equipped with the internal screw thread, and the inner wall threaded connection of barrel 3 is in the outer wall of fixed block 2.

The ring body 4 is arranged between the cylinder body 3 and the cylinder body of the hydraulic cylinder 1, the ring body 4 is sleeved on the periphery of the fixed block 2 and is in threaded connection with the outer wall of the fixed block 2, the periphery of the ring body 4 is provided with abutting blocks 41, the abutting blocks 41 are provided with three, and the three abutting blocks 41 are uniformly arranged at intervals around the axis of the ring body 4.

Referring to fig. 2 and 3, the core 5 is disposed in the accommodating cavity 31, one end of the telescopic rod of the hydraulic cylinder 1 disposed in the accommodating cavity 31 is coaxially provided with a positioning groove 11, one end of the core 5 is coaxially and fixedly connected with a protruding block 51, the protruding block 51 is embedded in the positioning groove 11, the outer diameter of the protruding block 51 is equal to the inner diameter of the positioning groove 11, the protruding block 51 is provided with a through hole 511, the through hole 511 penetrates through the protruding block 51, the axis of the through hole 511 is perpendicular to the axis of the core 5, the groove wall of the positioning groove 11 is provided with two pin holes 111, the two pin holes 111 are oppositely disposed, the inner diameter of the pin holes 111 is equal to the inner diameter of the through hole 511, the bolt 6 sequentially penetrates through one pin hole 111, the through hole 511 and the other pin hole 111, the outer diameter of the bolt 6 is equal to the inner diameter of the pin hole 111, the core 5 is provided as a cone, and the outer diameter of the core 5 is reduced along with being far away from the fixed block 2.

Referring to fig. 2, the snap ring 7 is coaxially and fixedly connected to one end of the cylinder 3 far away from the fixed block 2, the inner diameter of the snap ring 7 is larger than the outer diameter of the core 5, the outer diameter of the snap ring 7 is smaller than the outer diameter of the cylinder 3, the outer periphery of the snap ring 7 is provided with external threads, the cover 8 is provided with a mounting groove 81, the groove wall of the mounting groove 81 is provided with internal threads, the inner wall of the cover 8 is in threaded connection with the outer wall of the snap ring 7, and the outer diameter of the cover 8 is equal to the outer diameter of the cylinder 3.

The tank bottom of mounting groove 81 is coaxial to be equipped with mounting hole 82, expansion rod 9 includes fixture block 91 and body of rod 92, fixture block 91 fixed connection is in the one end of body of rod 92, the one end butt mounting groove 81 tank bottom of fixed block 2 is kept away from to fixture block 91, body of rod 92 stretches out mounting hole 82, the distance of mounting groove 81 tank bottom to barrel 3 is greater than the thickness of fixture block 91, expansion rod 9 is equipped with four, four expansion rods 9 evenly spaced around the axis of mounting hole 82 sets up, when the one end butt mounting groove 81's of the axis of mounting hole 82 is kept away from to four fixture blocks 91 cell walls, be equipped with the clearance between four adjacent fixture blocks 91, the one end of body of rod 92 orientation mounting hole 82 axis is established to the cambered surface, four bodies of rod 92 surround into expansion hole 93, expansion hole 93's inner wall is used for the periphery of butt core 5.

The implementation principle of the hydraulic expansion structure in the embodiment of the application is as follows: during assembly, the protruding block 51 is embedded in the positioning groove 11, the bolt 6 penetrates through the pin opening 111 and the through opening 511 to fix the core body 5 and the hydraulic cylinder 1, the expansion rod 9 is placed in the mounting groove 81, the rod body 92 extends out of the mounting opening 82, during expansion joint, the rod body 92 extends into the pipe body, the expansion rod of the hydraulic cylinder 1 is driven to slide, the core body 5 extends into the expansion rod 9 from the expansion opening 93 to expand the inner diameter of the pipe body, after machining is finished, the expansion rod of the hydraulic cylinder 1 is reset, and the rod body 92 is taken out of the pipe body after approaching, so that expansion joint is completed.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A hydraulic expansion structure, characterized in that: including barrel (3), pneumatic cylinder (1), lid (8), core (5) and expansion rod (9), the one end of barrel (3) is connected in the cylinder body of pneumatic cylinder (1), the other end of barrel (3) is connected in lid (8), barrel (3) are equipped with and hold chamber (31), hold the axial extension of chamber (31) along barrel (3), the piston rod of pneumatic cylinder (1) is connected in core (5), in holding chamber (31) are located to core (5), the one end of lid (8) orientation barrel (3) is equipped with mounting groove (81), the tank bottom of mounting groove (81) is equipped with mounting hole (82), mounting groove (81) are linked together in mounting hole (82), the axis of mounting hole (82) is collineatly with the axis of core (5), the one end of expansion rod (9) is inlayed in mounting groove (81), the other end of expansion rod (9) stretches out mounting hole (82), expansion rod (9) are equipped with a plurality of expansion rod (9) a plurality of expansion rod (82) are equipped with, a plurality of expansion rod (9) are equipped with expansion hole (82) around the coaxial setting up (93) of expansion rod (9) around the coaxial setting up of expansion rod (93), the core body (5) is used for extending into the expansion opening (93) to control the expansion of the expansion rod (9).

2. The hydraulic expansion structure according to claim 1, wherein: one end of the telescopic rod of the hydraulic cylinder (1) arranged in the accommodating cavity (31) is provided with a positioning groove (11), one end of the core body (5) is provided with a protruding block (51), and the protruding block (51) is embedded in the positioning groove (11).

3. The hydraulic expansion structure according to claim 2, wherein: the novel lock is characterized by further comprising a plug pin (6), wherein the protruding block (51) is provided with a through hole (511), the groove wall of the positioning groove (11) is provided with a pin hole (111), and the plug pin (6) penetrates through the pin hole (111) and then stretches into the through hole (511).

4. The hydraulic expansion structure according to claim 1, wherein: the outer diameter of the core body (5) is reduced with the distance from the telescopic rod of the hydraulic cylinder (1).

5. The hydraulic expansion structure according to claim 1, wherein: still include fixed block (2), fixed block (2) are connected in the cylinder body of pneumatic cylinder (1), fixed block (2) are equipped with and wear mouth (21), telescopic link sliding connection of pneumatic cylinder (1) is in the inner wall of wearing mouth (21), the inner wall threaded connection of barrel (3) is in the outer wall of fixed block (2).

6. The hydraulic expansion structure of claim 5, wherein: the hydraulic cylinder further comprises a ring body (4), wherein the ring body (4) is arranged between the cylinder body (3) and the cylinder body of the hydraulic cylinder (1), and the inner wall of the ring body (4) is connected with the outer wall of the fixed block (2) in a threaded manner.

7. The hydraulic expansion structure of claim 6, wherein: the periphery of the ring body (4) is connected with an abutting block (41).

8. The hydraulic expansion structure according to claim 1, wherein: still include snap ring (7), snap ring (7) are connected in barrel (3) one end of keeping away from pneumatic cylinder (1) cylinder body, the inner wall threaded connection of mounting groove (81) is in the outer wall of snap ring (7).

9. The hydraulic expansion structure according to claim 1, wherein: the expansion rod (9) comprises a clamping block (91) and a rod body (92), wherein the clamping block (91) is connected to one end of the rod body (92), the clamping block (91) is connected to the bottom of the mounting groove (81), and the rod body (92) stretches into the mounting opening (82).

10. The hydraulic expansion structure of claim 9, wherein: one end of the rod body (92) facing the axis of the mounting opening (82) is provided with an arc surface, and the arc surface is used for abutting the periphery of the core body (5).