Sealing gasket for high-purity transmission fluid and production process of sealing gasket

Abstract

The invention discloses a sealing gasket for high-purity transmission fluid and a production process thereof, the sealing gasket comprises a sealing gasket main body, the two sides of the sealing gasket main body are symmetrically provided with mounting lugs, and the mounting lugs are provided with mounting holes. The lug plates symmetrically distributed on the two sides of the flanges correspond to the mounting lugs on the two sides of the sealing gasket, and the bolts penetrate through the assembly holes of the flange lug plates and the mounting holes of the mounting lugs and then are screwed, so that the sealing gasket and the ends of the flanges are in butt joint and coincide without an exposed area, and the regularity of mounting the sealing gasket between the flanges is improved; the problem that the regularity of the sealing gasket installed between the flanges is affected due to the fact that part of the sealing gasket area with the installation holes is exposed is solved.

Description

Technical Field

[0001] The invention relates to a sealing gasket for high-purity transmission fluid and a production process thereof, belonging to the technical field of sealing rings. Background Art

[0002] In the system for conveying high-purity transmission fluid, in order to ensure that there is no leakage and no influence from external substances, a sealing gasket 1 needs to be installed between the flanges 2 of the conveying system. Figure 6 shown.

[0003] The existing sealing gasket, see Chinese patent publication number CN217762048U, has an annular distribution of mounting holes. For flanges with mounting ear plates symmetrically distributed on both sides, after the bolts penetrate, part of the sealing gasket area with the mounting holes is exposed, affecting the regularity of the sealing gasket installed between the flanges. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a sealing gasket for high-purity transmission fluid and a production process thereof.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a sealing gasket for high-purity transmission fluid, comprising:

[0007] The sealing pad body has mounting ears symmetrically arranged on both sides, and the mounting ears are provided with mounting holes.

[0008] A transmission fluid through hole for the flow of high-purity transmission fluid is provided in the middle of the sealing gasket body.

[0009] The sealing gasket body located at the inner wall of the fluid transmission hole is provided with two butt joint grooves which are symmetrically distributed.

[0010] The docking groove is a stuffy groove.

[0011] Both side edges of the butt joint groove are in arc shape.

[0012] A production process for a sealing gasket for high-purity transmission fluid, comprising:

[0013] The unloading plate is installed on the lower mold, and the sealing gasket made of expanded polytetrafluoroethylene cuts out the outline of the semi-finished product. At this time, the mounting ears, mounting holes, and fluid transmission holes are roughly formed; then the semi-finished product is placed on the unloading plate at the top of the lower mold, and then the upper mold is pressed down, and the pins are inserted from the through holes, mounting ears, mounting holes, fluid transmission holes and through holes of the upper mold and the lower mold, and then heated and vulcanized to vulcanize the main body of the sealing gasket, and the docking groove is formed under the extrusion of the docking groove molding protrusion.

[0014] The beneficial effects of the present invention are as follows: the ear plates symmetrically distributed on both sides of the flange correspond to the mounting ears on both sides of the sealing gasket, and the bolts are tightened after passing through the assembly holes of the flange ear plates and the mounting holes of the mounting ears, so that the sealing gasket and the flange end are butted and overlapped without any exposed area, thereby improving the regularity of the sealing gasket installed between the flanges and solving the problem of exposing some sealing gasket areas with mounting holes, affecting the regularity of the sealing gasket installed between the flanges. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a top view schematic diagram of the sealing gasket of the present invention;

[0016] Figure 2 yes Figure 1 A schematic cross-sectional view along line AA;

[0017] Figure 3 yes Figure 2 A local enlarged schematic diagram of point I in the middle;

[0018] Figure 4 It is a distribution diagram of the molding process structure of the present invention;

[0019] Figure 5 It is a top view schematic diagram of the stripper plate of the present invention;

[0020] Figure 6 It is a schematic diagram of the connection distribution of flange and sealing gasket in the prior art;

[0021] In the figure: 1-sealing gasket; 11-sealing gasket body; 12-mounting ear; 13-mounting hole; 14-through hole for transmitting fluid; 15-docking groove; 2-flange; 3-lower die; 31-docking groove forming protrusion; 32-through hole; 33-forming space; 4-upper die; 5-unloading plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0023] like Figures 1 to 5 shown.

[0024] A sealing gasket 1 for high-purity transmission fluid of the present invention comprises:

[0025] The sealing gasket body 11 has mounting ears 12 symmetrically extending on both sides thereof, and mounting holes 13 are provided at the mounting ears 12; a transmission fluid through hole 14 is provided in the middle of the sealing gasket body 11, and high-purity transmission fluid can flow in the transmission fluid through hole 14 of the sealing gasket body 11.

[0026] The sealing gasket body 11 located at the inner wall of the transmission fluid through hole 14 is provided with a docking groove 15, which is two symmetrically distributed about the axis, and the docking groove 15 is a stuffy groove, and the two docking grooves 15 are used to dock with the protrusions at the end of the flange, further ensuring that the high-purity transmission fluid will not leak and improving the isolation. The two sides of the docking groove 15 are arc-shaped.

[0027] The ear plates symmetrically distributed on both sides of the flange correspond to the mounting ears 12 on both sides of the sealing gasket 1. The bolts are tightened after passing through the assembly holes of the flange ear plates and the mounting holes 13 of the mounting ears 12. At this time, the docking grooves 15 are docked with the protrusions at the ends of the flanges, so that the sealing gasket 1 and the ends of the flanges are docked and overlapped without any exposed area, thereby improving the regularity of the sealing gasket installed between the flanges and solving the problem of exposing some areas of the sealing gasket with mounting holes, affecting the regularity of the sealing gasket installed between the flanges.

[0028] A production process of a sealing gasket for high-purity transmission fluid of the present invention comprises:

[0029] The unloading plate 5 is installed on the lower mold 3, and the sealing gasket 1 made of expanded polytetrafluoroethylene is cut out of the semi-finished product outline. At this time, the mounting ear 12, the mounting hole 13, and the transmission fluid through hole 14 are roughly formed; then the semi-finished product is placed on the unloading plate 5 at the top of the lower mold 3, and then the upper mold 4 is pressed down, and the pin is inserted from the through hole 32 of the upper mold 4, the mounting ear 12, the mounting hole 13, the transmission fluid through hole 14 and the through hole 32 of the lower mold 3, and then heated and vulcanized to make the sealing gasket body 11 vulcanized and formed, and the docking groove 15 is formed under the extrusion of the docking groove forming protrusion 31.

[0030] Both the lower mold 3 and the upper mold 4 are provided with a docking groove forming protrusion 31, and a stripper plate 5 is provided between the lower mold 3 and the upper mold 4. The top surface of the lower mold 3, the inner surface of the stripper plate 5 and the bottom surface of the upper mold 4 constitute a forming space 33 for the sealing gasket 1 to be formed. The middle and both sides of the lower mold 3 and the upper mold 4 are provided with through holes 32 for pins to pass through.

Claims

1. A sealing gasket for high-purity transmission fluid, characterized in that: include: A sealing gasket body (11) is provided with mounting ears (12) symmetrically on both sides, and the mounting ears (12) are provided with mounting holes (13).

2. The sealing gasket for high-purity transmission fluid according to claim 1, characterized in that: A transmission fluid through hole (14) for allowing high-purity transmission fluid to flow is provided in the middle of the sealing gasket body (11).

3. The sealing gasket for high-purity transmission fluid according to claim 2, characterized in that: The sealing gasket body (11) located at the inner wall of the fluid transmission hole (14) is provided with a docking groove (15), and the number of the docking grooves (15) is symmetrically distributed.

4. The sealing gasket for high-purity transmission fluid according to claim 3, characterized in that: The docking groove (15) is a stuffy groove.

5. The sealing gasket for high-purity transmission fluid according to claim 3, characterized in that: Both side edges of the docking groove (15) are in arc shape.

6. A production process of a sealing gasket for high-purity fluid transmission as claimed in claim 1, characterized in that: include: The stripper plate (5) is installed on the lower mold (3), and the sealing gasket (1) made of expanded polytetrafluoroethylene is cut out of the semi-finished product outline. At this time, the mounting ears (12), mounting holes (13), and transmission fluid through holes (14) are roughly formed; then the semi-finished product is placed on the stripper plate (5) at the top of the lower mold (3), and then the upper mold (4) is pressed down, and the pins are inserted from the through holes (32) of the upper mold (4), the mounting ears (12), the mounting holes (13), the transmission fluid through holes (14) and the through holes (32) of the lower mold (3), and then heated and vulcanized to make the sealing gasket body (11) vulcanized and formed, and the docking groove (15) is formed under the extrusion of the docking groove forming protrusion (31).

Images