CN110508999B

CN110508999B - Fluoroplastic clamping device for rupture disk safety device

Info

Publication number: CN110508999B
Application number: CN201810490639.0A
Authority: CN
Inventors: 卞锦保; 后文杰; 钭丽敏; 张菊萍; 顾雪铭; 叶礼元; 金佳伟
Original assignee: Shanghai Huali Safety Devices Co ltd
Current assignee: Shanghai Huali Safety Devices Co ltd
Priority date: 2018-05-21
Filing date: 2018-05-21
Publication date: 2021-07-06
Anticipated expiration: 2038-05-21
Also published as: CN110508999A

Abstract

The invention relates to a fluoroplastic clamping device for a rupture disk safety device, which comprises an upper clamp and a lower clamp, wherein the upper clamp and the lower clamp are clamped at two sides of a rupture disk, and the lower clamp comprises an internal metal framework and a fluoroplastic shell coated on the outer side of the metal framework; the upper holder is connected with the lower holder by a connecting piece through a screw, a rupture disk is arranged in the middle, and a nameplate is riveted on the side face of the lower holder or the upper holder. Compared with the prior art, the invention has the advantages of high negative pressure resistance, simple manufacture, excellent corrosion resistance, material saving and the like.

Description

Fluoroplastic clamping device for rupture disk safety device

Technical Field

The invention relates to the technical field of rupture disk safety devices, in particular to a fluoroplastic clamping device for a rupture disk safety device.

Background

At present, the lower holders used for the explosive sheet safety devices for strong corrosive media are all fluoroplastics or fluoroplastic sprayed on the metal surface. If all fluoroplastics are adopted and a full vacuum negative pressure state exists, the deformation phenomenon is obvious, and if the high-temperature working condition exists, the deformation is more obvious. If the fluoroplastic is sprayed on the metal surface, the sprayed layer can be damaged if being impacted by external force, and the corrosion starts from the damaged part. Under above two kinds of circumstances, clamping device life can not very long, and clamping device damages the back, and the damage of abnormal phenomenon also can appear in the rupture disk. The replacement is needed before the original expected replacement period, which brings many problems on economy, management and production planning for the use enterprises. The clamping device is low in cost, good in reliability, strong in corrosion resistance, excellent in back pressure bearing capacity and suitable for being not deformed under high-temperature working conditions, and is an urgent requirement of a rupture disk safety device user.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a fluoroplastic clamping device for a rupture disk safety device, which has high mechanical strength and low cost.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a fluoroplastic clamping device for rupture disk safety device, clamping device includes the last holder of centre gripping in rupture disk both sides and lower holder, lower holder includes inside metal framework and the fluoroplastics casing of cladding in the metal framework outside. According to the invention, the mechanical strength of the lower clamp holder is increased, the consumption of the fluoroplastic is reduced and the cost required by production is saved by a mode of internally arranging the metal framework.

The metal framework is made of carbon steel or stainless steel.

The manufacturing method of the lower clamp holder comprises the following steps:

(1) the metal framework is prefabricated, a welding structure is adopted, and carbon steel or stainless steel can be selected as materials.

(2) And filling a proper amount of fluoroplastic powder raw materials in the mould.

(3) And placing a metal framework.

(4) And continuously filling a proper amount of fluoroplastic powder raw materials.

(5) And (5) die assembling and extrusion molding.

(6) And (6) demolding.

(7) Heating to a predetermined temperature and sintering.

The middle part of the upper surface of the lower holder is a spherical bulge, the middle part of the lower surface of the upper holder is a spherical recess matched with the spherical bulge, and the rupture disc is clamped between the spherical bulge and the spherical recess.

The corresponding area of the spherical bulge in the lower holder is provided with through holes which are uniformly distributed and penetrate through the upper surface and the lower surface of the lower holder.

The outer sides of the upper clamp holder and the lower clamp holder are provided with connecting pieces, and the upper clamp holder and the lower clamp holder are fixedly connected with the connecting pieces through screws.

And a nameplate for indicating the type, the batch number and the pressure grade of the clamp holder is arranged on the outer side of the clamping device. The nameplate is riveted on the side face of the lower holder or the upper holder.

Compared with the prior art, the beneficial effects of the invention are embodied in the following aspects:

(1) the cost of raw materials is saved by 40 percent. The machining cost is saved by 60%.

(2) On the premise of unchanged volume, the mechanical strength is doubled.

(3) Can be produced in batch, and the processing period is shortened by 50 percent.

Drawings

FIG. 1 is a schematic sectional view of a clamping device according to the present invention;

FIG. 2 is a schematic top view of the clamping device of the present invention.

Wherein, 1 is the upper holder, 2 is the lower holder, 3 is metal framework, 4 is the data plate, 5 is the connection piece, 6 is the connecting screw, 7 is the through-hole, 8 is the rupture disk.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

Example 1

A fluoroplastic gripping device for a rupture disk safety device, configured as shown in fig. 1 and 2, comprising:

the upper clamp 1 is matched with the lower clamp 2 to clamp the rupture disc 8, and is installed between two flanges (the flanges are not shown in the drawing, and two flange plates can be respectively installed at the upper part and the bottom part of the clamping device shown in the drawing 1 in practical application) after being assembled;

the lower clamp holder 2 is matched with the upper clamp holder 1 to clamp the rupture disk 8;

the connecting piece 5 and the fixing screw 6 are used for fixing the upper clamp holder 1 and the lower clamp holder 2, and the relative positions are not changed;

the nameplate 4 is used for indicating information such as the type, batch number, pressure grade and the like of the clamp holder;

the metal framework 3 is embedded in the lower holder 2 and plays a role in increasing the rigidity of the lower holder.

The middle part of the upper surface of the lower holder 2 is a spherical bulge, the middle part of the lower surface of the upper holder 1 is a spherical recess matched with the spherical bulge, and the rupture disk 8 is held between the spherical bulge and the spherical recess.

The corresponding area of the spherical bulge in the lower holder 2 is provided with through holes 7 which are uniformly distributed and penetrate through the upper surface and the lower surface of the lower holder 2.

Claims

1. A fluoroplastic clamping device for a rupture disk safety device comprises an upper clamp and a lower clamp which are clamped at two sides of a rupture disk, and is characterized in that the lower clamp comprises an internal metal framework and a fluoroplastic shell coated on the outer side of the metal framework;

the manufacturing method of the lower clamp holder comprises the following steps: (1) prefabricating a metal framework by adopting a welding structure; (2) filling a proper amount of fluoroplastic powder raw materials in the mould; (3) placing a metal framework; (4) continuously filling a proper amount of fluoroplastic powder raw materials; (5) die assembly and extrusion molding; (6) demolding; (7) heating to a predetermined temperature and sintering.

2. A fluoroplastic gripping device for a rupture disk safety apparatus as claimed in claim 1 wherein the metal frame is of carbon steel or stainless steel.

3. A fluoroplastic clamping device as claimed in claim 1 wherein the upper surface of said lower clamp is formed with a spherical projection and the lower surface of said upper clamp is formed with a spherical recess matching the spherical projection, said rupture disk being clamped between the spherical projection and the spherical recess.

4. A fluoroplastic gripping device for a rupture disk safety apparatus as claimed in claim 3 wherein the lower gripper is provided with uniformly distributed through-holes in corresponding areas of the spherical projections extending through the upper and lower surfaces of the lower gripper.

5. A fluoroplastic clamping device for a rupture disk safety device according to claim 1 wherein the upper and lower clamps are provided with a connecting plate on the outside thereof, and the upper and lower clamps are fixedly connected with the connecting plate by screws.

6. A fluoroplastic clamping device for a rupture disk safety apparatus as claimed in claim 1 wherein the outer side of the clamping device is provided with a nameplate for indicating the type, lot number and pressure rating of the clamp.