CN213236506U

CN213236506U - Isostatic pressing pipe fitting forming structure

Info

Publication number: CN213236506U
Application number: CN202021395958.2U
Authority: CN
Inventors: 何正纲; 蒋福祥; 洪显树
Original assignee: Zhejiang Dongfu Plastic Science & Technology Co ltd
Current assignee: Zhejiang Dongfu Plastic Science & Technology Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-05-18
Anticipated expiration: 2030-07-15

Abstract

The utility model discloses an isostatic pressing pipe fitting shaping structure belongs to pipe fitting shaping technical field, including pipy steel lining and the coaxial mold core of pegging graft in the steel lining, have pipy first die cavity between steel lining and the mold core, the both ends of steel lining are equipped with the flange respectively, evenly be equipped with a plurality of mounting holes along its hoop on the flange, the both ends of mold core are equipped with annular end plate respectively, the second die cavity has between end plate and the flange, be equipped with annular sealing member in the second die cavity, the mounting hole is plugged up to the sealing member. To the sealed face of steel lining tetrafluoro pipe little among the prior art, sealed poor technical problem of effect, the utility model provides an isostatic pressing pipe fitting shaping structure, it is big with sealed face as far as when can the remolding to improve sealed effect.

Description

Isostatic pressing pipe fitting forming structure

Technical Field

The utility model relates to a pipe fitting shaping technical field, concretely relates to isostatic pressing pipe fitting shaping structure.

Background

The steel-lined polytetrafluoroethylene PTFE pipe and the steel-lined polytetrafluoroethylene PTFE pipe fittings are well known as the plastic king, have excellent temperature resistance and corrosion resistance, and are ideal conveying equipment for organic solvents such as nitric acid, sulfuric acid, hydrofluoric acid, phosgene, chlorine, aqua regia, mixed acid, bromide and the like and other strongly corrosive media. The steel lining tetrafluoro pipe and fittings can stably run under the working condition of high temperature (within 150 ℃) limit negative pressure for a long time, the defect that the traditional steel lining tetrafluoro pipe and fittings can not resist negative pressure is overcome, and the steel lining tetrafluoro pipe and fittings are widely applied to a plurality of high-temperature high-negative-pressure systems such as distillation and the like.

The sealing surface of the existing steel lining tetrafluoride pipe is small, and the sealing surface can be changed little after temperature change in the actual use process, so that the sealing effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

To the sealed face of steel lining tetrafluoro pipe little among the prior art, sealed poor technical problem of effect, the utility model provides an isostatic pressing pipe fitting shaping structure, it is big with sealed face as far as when can the remolding to improve sealed effect.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

an isostatic pressing pipe fitting forming structure comprises a tubular steel liner and a mold core coaxially inserted into the steel liner, wherein a first tubular mold cavity is formed between the steel liner and the mold core, flanges are arranged at two ends of the steel liner respectively, a plurality of mounting holes are uniformly formed in the flanges along the circumferential direction of the flanges, annular end plates are arranged at two ends of the mold core respectively, a second mold cavity is formed between the end plates and the flanges, an annular sealing piece is arranged in the second mold cavity, and the mounting holes are blocked by the sealing piece.

Optionally, a limiting part is arranged at the outer edge of the sealing element, and a limiting groove matched with the outer edge of the flange is arranged between the sealing element and the limiting part.

Optionally, the sealing element is arranged on one side of the end plate, and the other side of the end plate is provided with an annular pressurizing piece corresponding to the outer side of the sealing element.

Optionally, a plug for plugging the mounting hole is detachably mounted on the flange.

Optionally, an annular pressing plate is sleeved outside the steel lining, and one side of the pressing plate is abutted to the blocking piece.

Optionally, the inner edge of the sealing member is flush with an end sidewall of the mounting hole adjacent to the first mold cavity.

Optionally, the inner walls of the first mold cavity and the second mold cavity are smooth joint surfaces.

Optionally, the mold core is a circular tube.

Optionally, the end plate and the mold core are detachably connected.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) when the pipe fitting is molded, the PTFE lining is formed in the first die cavity, the sealing part which is integrally molded with the PTFE lining is formed in the second die cavity, the sealing part and the flange are tightly attached together to realize a sealing effect, and under the condition that the mounting hole is blocked by the sealing element, the contact surface between the sealing part and the flange can be made as large as possible during molding, so that the sealing performance of the molded pipe fitting is guaranteed;

(2) the sealing piece can prevent static pressure medium from entering the first die cavity and the second die cavity through the mounting hole to influence the forming effect when the static pressure medium is isostatic;

drawings

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

FIG. 2 is a partial schematic view of FIG. 1 at A;

1. a steel lining; 2. a mold core; 3. a first mold cavity; 4. a flange; 41. mounting holes; 5. an end plate; 6. a second mold cavity; 7. a seal member; 8. a limiting part; 9. a limiting groove; 10. a pressing member; 11. plugging pieces; 12. and (7) pressing a plate.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings 1-2.

With reference to fig. 1-2, the isostatic pressing pipe forming structure of this embodiment includes a tubular steel liner 1 and a mold core 2 coaxially inserted into the steel liner 1, the mold core 2 is a circular tube, a tubular first mold cavity 3 is provided between the steel liner 1 and the mold core 2, flanges 4 are respectively integrally formed at two ends of the steel liner 1, a plurality of mounting holes 41 are uniformly provided on the flanges 4 along the circumferential direction thereof, two formed isostatic pressing pipes can be connected together through the flanges 4 and the mounting holes 41 to form a larger passage, annular end plates 5 are respectively provided at two ends of the mold core 2, the end plates 5 are provided at the outer sides of the flanges 4, a second mold cavity 6 is provided between the end plates 5 and the flanges 4, an annular sealing member 7 is provided in the second mold cavity 6, two ends of the sealing member 7 are respectively sealed and abutted against the wall bodies of the end plates 5 and the flanges 4, the sealing member 7 is provided above the mounting holes 41 to block the mounting holes 41, when can prevent the isostatic pressing, the static pressure medium gets into in first die cavity and the second die cavity through the mounting hole and influences the shaping effect.

As the utility model discloses a preferred scheme, sealing member 7 outward flange department integrated into one piece has spacing portion 8, and spacing portion 8 encircles the circumferencial direction setting of sealing member 7, have between sealing member 7 and the spacing portion 8 with flange 4 outward flange matched with spacing groove 9, when sealing member 7 and flange 4 butt, flange 4 imbeds to spacing groove 9 in, horizontal position between flange 4 and the sealing member 7 this moment keeps relatively fixed to make the PTFE lining size after the shaping more accurate.

As a preferable scheme of the utility model, the sealing element 7 is arranged on one side of the end plate 5, and the other side of the end plate 5 is provided with an annular pressurizing piece 10 corresponding to the outer side of the sealing element 7; due to the arrangement of the pressurizing piece 10 of the annular pressurizing piece 10, when isostatic pressing is carried out, the end plate 5, the sealing piece 7 and the flange 4 are extruded when the pressurizing piece 10 is under pressure, so that the end plate 5, the sealing piece 7 and the flange 4 are tightly attached together, the outer edge of the inner side of the end plate 5 is prevented from tilting outwards after being under force, and the sealing effect during isostatic pressing is improved.

As the utility model discloses an optimal scheme, demountable installation has the stifled piece 11 that is used for plugging up mounting hole 41 on the flange 4, and 11 one end of stifled piece are embedded into in mounting hole 41 in order to plug up mounting hole 41, and the opposite side that mounting hole 41 corresponds to sealing member 7 is located to stifled piece 11, all plugs up the both ends of mounting hole 41 through sealing member 7 and stifled piece 11, and sealed effect sealing member 7 when can effectively improving the isostatic pressure can prevent simultaneously that the shaping powder in the second die cavity 6 from getting into and causing the jam in the mounting hole 41.

As a preferred scheme of the utility model, an annular pressing plate 12 is sleeved outside the steel lining 1, and one side of the pressing plate 12 is abutted against the blocking piece 11; during isostatic pressing, the clamp plate 12 extrudes the closure 11 under the effect of pressure so as to drive the better mounting hole 41 of blocking of the closure 11, improves the sealing effect of the closure 11 to the mounting hole 41, compares the pressure and directly applies on the closure 11, and the clamp plate 12 can indirectly apply the pressure on the closure 11, and the application of force is more even, and the stress direction of the closure 11 is ensured to be consistent with the axial direction of the mounting hole 41.

As a preferred embodiment of the present invention, the inner edge of the sealing member 7 is flush with the end side wall of the mounting hole 41 near the first mold cavity 3; the molding is carried out under the state, the molded sealing surface is the largest sealing surface on the premise of not influencing the connection effect of the flange 4, and even if the molded sealing surface shrinks due to the influence of temperature, the sealing surface still has a better sealing effect.

As the utility model discloses an optimal scheme, the inner wall of first die cavity 3 and second die cavity 6 is smooth connection face, and difficult adhesion during follow-up drawing of patterns guarantees that the PTFE lining wall body after the shaping is smooth, and the circulation of medium in the PTFE lining is good.

As a preferred embodiment of the present invention, the end plate 5 and the mold core 2 are detachably connected to facilitate the subsequent removal of the mold core 2 from the formed isostatic tube.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. Isostatic pressing pipe fitting forming structure, its characterized in that: including pipy steel lining (1) and coaxial mold core (2) of pegging graft in steel lining (1), have pipy first die cavity (3) between steel lining (1) and mold core (2), the both ends of steel lining (1) are equipped with flange (4) respectively, evenly be equipped with a plurality of mounting holes (41) along its hoop on flange (4), the both ends of mold core (2) are equipped with annular end plate (5) respectively, second die cavity (6) have between end plate (5) and flange (4), be equipped with annular sealing member (7) in second die cavity (6), mounting hole (41) are plugged up in sealing member (7).

2. The isostatic tube forming structure according to claim 1, wherein: the outer edge of the sealing element (7) is provided with a limiting part (8), and a limiting groove (9) matched with the outer edge of the flange (4) is formed between the sealing element (7) and the limiting part (8).

3. The isostatic tube forming structure according to claim 1, wherein: the sealing element (7) is arranged on one side of the end plate (5), and the other side of the end plate (5) is provided with an annular pressurizing element (10) corresponding to the outer side of the sealing element (7).

4. The isostatic tube forming structure according to claim 1, wherein: and the flange (4) is detachably provided with a blocking piece (11) for blocking the mounting hole (41).

5. The isostatic tube forming structure according to claim 4, wherein: the outer side of the steel lining (1) is sleeved with an annular pressing plate (12), and one side of the pressing plate (12) is abutted to the blocking piece (11).

6. The isostatic tube forming structure according to claim 1, wherein: the inner edge of the sealing member (7) is flush with the end side wall of the mounting hole (41) close to the first cavity (3).

7. The isostatic tube forming structure according to claim 1, wherein: the inner walls of the first die cavity (3) and the second die cavity (6) are smooth connecting surfaces.

8. The isostatic tube forming structure according to claim 1, wherein: the mold core (2) is of a circular tube type.

9. The isostatic tube forming structure according to claim 1, wherein: the end plate (5) is detachably connected with the mold core (2).