CN206242560U - A kind of LP types rupture disk shaping jig - Google Patents

Abstract

An LP-type bursting disc forming fixture, including a forming upper fixture and a forming lower fixture. Multiple compression modules are arranged in the forming upper fixture, each compression module includes a vertical through hole and a piston pressure rod, and the porous pressure plate is fixedly connected. The upper port of the vertical through hole of the compression module is blocked on the upper forming jig, and a plurality of communication holes are arranged on the porous platen. A molding space is formed on the upper surface of the lower fixture. The bursting disc raw material plates to be formed are placed in the forming space and their positions are limited by the positioning plate. The positioned bursting disc raw material plates are facing the compression module. The bottom of the center is connected to the forming pressure source through the pressure pipeline; there is also a discharge hole inside the piston rod. The utility model can realize the forming of bursting discs of different outer diameter models, and the positioning is accurate and fast, and can avoid forming failure caused by pressure leakage and indentation defects caused by alignment errors.

Description

A LP type bursting disc forming fixture

technical field

The utility model relates to a fixture, in particular to a forming fixture for producing LP type (ordinary positive arch type) bursting discs.

Background technique

The bursting disc is a component that bursts and releases pressure at the calibrated bursting pressure and temperature. It forms a bursting disc device with the holder (or support ring) and other parts. The bursting disc device is a pressure relief device that cannot be closed repeatedly. Static pressure actuation, the pressure is relieved by rupture of the pressurized diaphragm. Simply put, it is a one-time pressure relief device. At the set burst temperature, when the pressure difference on both sides of the bursting disc reaches a predetermined value, the bursting disc can act (rupture or fall off) and release the fluid.

LP type bursting disc is a normal arched bursting disc. When working, the system pressure acts on the concave surface of the arched shell. When the protected system is overpressured, the element is stretched in both directions, plastic deformation occurs, the wall thickness is thinned, and finally ruptures. , to release the pressure, so as to protect the system.

As shown in Figure 1, the structure of the traditional fixture used for LP-type bursting disc molding includes an upper fixture 04 and a lower fixture 01, a bursting disc 02 to be processed is placed between the upper fixture 04 and the lower fixture 01, and the upper fixture 04 and the lower fixture 01 is equipped with a pressurized channel, and the forming of the LP bursting disc is completely dependent on applying pressure to the upper and lower fixtures to compress the bursting disc device to achieve compaction and sealing. The shortcomings are:

1) The molding of multiple bursting discs to be processed requires very high processing precision of the fixture, and the processing precision of the bursting disc device must also be very high. In the existing forming process, even if the sealing ring 03 is installed, it is usually difficult to ensure the sealing. Resulting in pressure leakage and resulting in molding failure; 2) The traditional full-face compression of the bursting disc does not set the positioning of the bursting disc device and the positioning between the upper and lower clamps. It is purely placed and aligned by the staff manually, which is a waste of time and is prone to errors. The indentation defects caused by the defective products.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a LP-type bursting disc forming fixture, which can realize the forming of bursting discs with different outer diameters, accurate and fast positioning, and can avoid forming failure and failure caused by pressure leakage. Indentation defect scrap problem due to misalignment.

The technical scheme adopted by the utility model to solve the technical problem is: comprising upper and lower forming clamps and forming lower clamps, the forming upper clamps are provided with a plurality of compression modules, and each compression module includes a vertical through hole and the piston pressure rod sealed and installed in the vertical through hole, a porous pressure plate is arranged above all the compression modules, the porous pressure plate is fixedly connected to the upper surface of the upper forming fixture and blocks the upper port of the vertical through hole of the compression module, A plurality of communication holes are arranged on the porous platen, the upper port of the communication hole is connected to the compression pressure source, and the lower port of the communication hole is connected to the vertical through hole; the upper surface of the forming lower fixture forms a forming space, and the bursting disc to be formed The raw material plates are placed in the forming space and their positions are limited by the positioning plates. The positioned bursting disc raw material plates are facing the compression module. Below the center of each bursting disc raw material plate, the forming space is connected downwards to the Forming pressure source; there is also a relief hole inside the piston rod, one port of the relief hole is located above the center of the bursting disc raw material plate, and the other port leads to the forming space on the side.

Compared with the prior art, a LP-type bursting disc forming fixture of the utility model includes an upper and lower forming fixture and a forming lower fixture, and the bursting disc raw material plate to be formed is placed between the forming upper fixture and the forming lower fixture. In the forming space, the positions are limited by the positioning plates. The positioning plates of different sizes can be replaced to realize the forming of bursting discs with different outer diameters. The positioning function is also less time-consuming and less error-prone than the traditional placement, improving work efficiency. Greatly improved; the utility model adopts a plurality of compression modules in the forming upper fixture to respectively compress a plurality of bursting disc raw material plates to be formed in the forming lower fixture from above, and at the same time cooperate with the forming of the bursting disc raw material plates below The pressure source is separately molded and applied, so each bursting disc raw material plate can be individually pressed and formed. Compared with the traditional full-surface pressed bursting disc, it better solves the problems caused by the processing error of the bursting disc pressure ring and the fixture The problem of pressure leakage caused by processing errors and molding failure; in addition, the two positioning in the fixture of the utility model, that is, the positioning of the bursting disc raw material plate and the clamping and positioning of the upper forming fixture and the lower forming fixture, are both in the horizontal and vertical directions. Each dimension constitutes an effective limit, successfully avoiding the problem of indentation defects and defective products caused by alignment errors.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic structural view of a traditional forming fixture.

Fig. 2 is a schematic structural view of an embodiment of the utility model.

In the figure, 01, lower fixture, 02, rupture disc to be processed, 03, sealing ring, 04, upper fixture, 1, forming lower fixture, 2, positioning plate, 3, bursting disc raw material plate, 4, piston pressure rod, 5 , O-ring, 6, molding fixture, 7, porous platen, 8, screw, 9, positioning pin, 10, discharge hole.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

Figure 2 shows a schematic structural view of a preferred embodiment of the utility model, a LP-type bursting disc forming fixture in the figure, including an upper and lower forming fixture 6 and a forming lower fixture 1, the forming upper fixture 6 There are a plurality of compression modules inside, each compression module includes a vertical through hole and a piston pressure rod 4 sealed and installed in the vertical through hole, and a porous pressure plate 7 is arranged above all the compression modules, and the porous pressure plate 7 is fixedly connected to the upper surface of the upper forming jig 6 and blocks the upper port of the vertical through hole of the compression module. A plurality of communication holes are arranged on the porous pressure plate 7. The upper port of the communication hole is connected to the compression pressure source, and the lower port of the communication hole It communicates with the vertical through hole; the upper surface of the molding lower fixture 1 forms a molding space, and the bursting disc raw material plate 3 to be formed is placed in the forming space and the position is defined by the positioning plate 2. The positioned bursting disc raw material plate 3 Facing the compression module, under the center of each bursting disc raw material plate 3, the forming space is connected downwards to the forming pressure source through the pressure pipe; there is also a discharge hole 10 inside the piston rod 4 to discharge One port of the hole 10 is located above the center of the bursting disc raw material plate 3, and the other port of the hole 10 leads to the forming space at the side. Relief 10 holes are used to extrude the air caused by the amount of deformation produced by the relief.

Referring to Fig. 2, a concave platform can also be provided on the upper surface of the forming upper fixture 6, and the concave platform is located above all the pressing modules, and the porous pressing plate 7 is fixedly connected with the forming upper fixture 6 in the concave platform, and the porous pressing plate 7 The upper surface is flush with the upper surface of the molding upper jig 6 .

As a further improvement of this embodiment, the vertical through hole of the compression module can also be provided with a limit step near the bottom end, and the limit step limits the stroke of the piston pressing rod 4 . It is also convenient to operate when assembling the piston pressure rod 4 separately.

In order to enhance the sealing effect, an O-ring 5 can be installed between the piston rod 4 of the compression module and the vertical through hole.

In this embodiment, the porous press plate 7 is fixedly connected to the upper forming fixture 6 by screws 8 around it, and the upper forming fixture 6 and the lower forming fixture 1 are aligned and reinforced by positioning pins 9 . The above is only a specific structure that can be realized, and is not limited to this, and other conventional connection methods are also acceptable.

Put the entire fixture of the utility model on the platform of the hydraulic press, and provide pressure sources up and down, compression pressure sources above, and forming pressure sources below, whether it is a compression pressure source or a molding pressure source, it can be gas Or the pressure formed by liquid input, the pressing side (that is, the side of the upper forming fixture 6) gives a predetermined pressure, and after the piston pressure rod 4 presses the bursting disc raw material plate 3, start the forming side (that is, the side of the lower forming fixture 1) According to the pressure source of the forming pressure, the forming pressure is given according to the design pressure of the bursting disc. When the specified pressure is reached, the pressure is released on the forming side, and then the pressure is released on the pressing side, and the bursting disc is taken out to complete the forming of the bursting disc.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in any form. Any simple modifications and equivalent changes made to the above embodiments according to the technical essence of the utility model shall fall within the scope of the present invention. Into the scope of protection of the present utility model.

Claims (5)

1. a kind of LP types rupture disk shaping jig, including the shaping upper fixture (6) docked up and down and shaping lower clamp (1), it is special Levying is：

Multiple compression modules are provided with shaping upper fixture (6), each compression module includes that vertical through holes and sealing are installed Piston depression bar (4) in vertical through holes, is provided with porous pressing plate (7) above all compression modules, and porous pressing plate (7) is connected In shaping upper fixture (6) upper surface and the upper port of the vertical through holes for blocking compression module, multiple company is set on porous pressing plate (7) Through hole, the upper port connection compaction pressure source of intercommunicating pore, the lower port of intercommunicating pore is communicated with vertical through holes；The shaping lower clamp (1) upper surface is formed with molding space, and rupture disk raw material plate (3) to be formed is placed in molding space and by location-plate (2) defined position each other, the rupture disk raw material plate (3) after positioning just to compression module, in each rupture disk raw material plate (3) Heart lower section, molding space is all communicated to downwards briquetting pressure source by the pipeline that presses；Also have in the inside of piston depression bar (4) and let out Discharge hole (10), a port of escape orifice (10) is located at the overcentre of rupture disk raw material plate (3), and its another port is in side Lead to molding space.

2. a kind of LP types rupture disk shaping jig according to claim 1, it is characterized in that：In shaping upper fixture (6) Upper surface be additionally provided with concave station, concave station is located at the top of all compression modules, porous pressing plate (7) in concave station with shaping upper fixture (6) it is fixedly connected, the upper surface flush of the upper surface of porous pressing plate (7) and shaping upper fixture (6).

3. a kind of LP types rupture disk shaping jig according to claim 1, it is characterized in that：The vertical of the compression module leads to Hole is being provided with limited step near bottom end, and limited step limits the stroke of piston depression bar (4).

4. a kind of LP types rupture disk shaping jig according to claim 1 or 2 or 3, it is characterized in that：In the compression module Piston depression bar (4) and vertical through holes between mounting O-shaped sealing ring (5).

5. a kind of LP types rupture disk shaping jig according to claim 1 or 2 or 3, it is characterized in that：The porous pressing plate (7) it is fixedly connected on by screw (8) in shaping upper fixture (6) in its surrounding, is molded upper fixture (6) and shaping lower clamp (1) Reinforced by alignment pin (9) after aligning.