Novel plane sealing structure capable of improving sealing performance

Abstract

The utility model discloses a novel plane sealing structure capable of improving sealing performance, which comprises an upper plane body, a lower plane body is arranged below the upper plane body, the upper plane body and the lower plane body are connected through a plurality of bolts, the bottom of the upper plane body is provided with a sealing installation groove, and the sealing installation groove is connected with the lower plane body through bolts. The outer side edge of the sealing installation groove extends downwards to be provided with a step protrusion integrated with the upper plane body, and only the bottom face of the step protrusion is attached to the lower plane body. Only the step bulge is in contact with the lower plane body, so that the contact area of the planes is reduced, and a gap formed by the two planes due to uneven spraying thickness is reduced; the edge of the inner side of the sealing installation groove of the upper plane body is lifted upwards, the O-shaped ring with the hollow cavity is designed in the sealing installation groove, when the working pressure of the inner cavity of the whole structure rises, the pressure can enter the hollow cavity through the air duct, the whole O-shaped ring expands and deforms towards the outer side, the problem that the sealing specific pressure is reduced due to a plane gap is solved, and the sealing effect is improved. And meanwhile, the sealing performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve sealing technical field, concretely relates to a novel plane sealing structure of improving sealing performance. BACKGROUND

[0002] Plane sealing structure is a common sealing mode in valve, mainly relies on the pre-tightening force of its connecting bolt, prevents the leakage of fluid medium through the working sealing specific pressure of O type ring in the groove and the close contact of two planes. This structure is simple, but needs to control the surface flatness, can help to improve the sealing performance. The surface of parts needs electrostatic spraying, since the electrostatic spraying thickness is uneven, will form a about 0.3~0.5mm uneven surface, so there will be 0.3~0.5mm gap between the matching surface, under high pressure, it is easy to produce leakage.

[0003] Therefore, the utility model designs a novel plane sealing structure of improving sealing performance. UTILITY MODEL CONTENTS

[0004] The utility model discloses a novel plane sealing structure of improving sealing performance, to solve the problem of above -mentioned background art.

[0005] To realize above -mentioned purpose, the utility model provides the following technical scheme: a novel plane sealing structure of improving sealing performance, including upper plane body, the lower plane body is arranged in the lower of upper plane body, the upper plane body is connected with lower plane body through a plurality of bolts, the bottom of upper plane body is provided with sealing installation groove, the outer side edge of sealing installation groove is provided with the step projection of the integral with upper plane body and only the bottom surface of step projection is pasted with lower plane body downward extension, and the inner side edge of sealing installation groove is formed with the opening of lifting up, the O type ring for sealing the gap between upper plane body and lower plane body is arranged in sealing installation groove, and the expansion structure is arranged in the O type ring.

[0006] Preferably, the O type ring is provided with a splicing protrusion, a splicing groove corresponding to the splicing protrusion is formed on the sealing installation groove, and the splicing protrusion extends into the splicing groove and is connected by clamping.

[0007] Preferably, the expansion structure includes a hollow cavity arranged inside the O type ring and a plurality of air passages arranged to communicate the hollow cavity with the opening.

[0008] Preferably, the shape and size of the O type ring are matched with the shape and size of the sealing installation groove.

[0009] Preferably, the splicing protrusion and the O type ring are an integral structure formed integrally.

[0010] Preferably, the outer side of the stepped protrusion forms a ring-shaped outer groove between the upper planar body and the lower planar body, a matching outer sealing ring is arranged in the ring-shaped outer groove, and the outer sealing ring is attached to the upper planar body and the lower planar body by the threaded bolt.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The downwardly extending stepped protrusion is arranged on the outer side edge of the sealing installation groove of the upper planar body, so that only the stepped protrusion contacts the lower planar body, the contact area of the planar body is reduced, and the gap formed by the uneven spraying thickness between the planar bodies is reduced; the inner side edge of the sealing installation groove of the upper planar body is raised upward, and an O-shaped ring with a hollow cavity is arranged in the sealing installation groove, when the working pressure of the inner cavity of the overall structure rises, the pressure enters the hollow cavity through the air passage, so that the entire O-shaped ring expands and deforms outward, the problem of reduced sealing specific pressure caused by the gap between the planar bodies is compensated, and the sealing performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall sectional structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the enlarged structure of A of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the outer sealing ring of the utility model;

[0016] In the drawing: 1, threaded bolt; 2, upper planar body; 3, O-shaped ring; 4, lower planar body; 5, ring-shaped outer groove; 6, outer sealing ring; 7, stepped protrusion; 8, sealing installation groove; 9, splicing protrusion; 10, splicing groove; 11, hollow cavity; 12, air passage. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Embodiment 1

[0019] Please refer to Figure 1 and Figure 3The utility model provides a technical scheme: a novel plane seal structure that improves sealing performance, including upper plane body 2, the lower part of upper plane body 2 is provided with lower plane body 4, and upper plane body 2 is connected with lower plane body 4 through a plurality of bolts 1, and the bottom of upper plane body 2 is provided with sealing installation groove 8, and the outer side edge of sealing installation groove 8 is provided with step protrusion 7 integrated with upper plane body 2 downwardly, and only the bottom surface of step protrusion 7 is attached with lower plane body 4, the contact area of plane is reduced, and the gap formed by the uneven spraying thickness of two planes is reduced, the inner side edge of sealing installation groove 8 is lifted upward to form an opening, O type ring 3 for sealing the gap between upper plane body 2 and lower plane body 4 is arranged in sealing installation groove 8, and expansion structure is arranged in O type ring 3, in the embodiment, preferably, the expansion structure includes hollow cavity 11 arranged in O type ring 3 and a plurality of air passages 12 for communicating hollow cavity 11 with the opening, when the working pressure of the inner cavity of the overall structure rises, the pressure will enter hollow cavity 11 through air passage 12, so that the whole O type ring 3 expands and deforms to the outside, the sealing specific pressure reduction problem caused by the gap between planes is compensated, and the sealing performance is improved, in the embodiment, preferably, splicing protrusion 9 is arranged on O type ring 3, splicing groove 10 corresponding to splicing protrusion 9 is formed on sealing installation groove 8, and splicing protrusion 9 extends into splicing groove 10 and is connected in the snap-fit mode, in the embodiment, preferably, the shape and size of O type ring 3 are matched with the shape and size of sealing installation groove 8, in the embodiment, preferably, splicing protrusion 9 and O type ring 3 are integrally formed in an integrated structure, in the embodiment, preferably, the outer side of step protrusion 7 forms annular outer groove 5 between upper plane body 2 and lower plane body 4, matching outer sealing ring 6 is arranged in annular outer groove 5, and outer sealing ring 6 is attached with upper plane body 2 and lower plane body 4 through screw bolt 1.

[0020] Although the embodiments of the utility model have been shown and described, and the detailed description is described above, those skilled in the art can understand that the embodiments can be changed, modified, replaced and changed in various ways without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A novel planar sealing structure for improving sealing performance, comprising an upper planar body (2), characterized in that: A lower plane (4) is provided below the upper plane (2). The upper plane (2) and the lower plane (4) are connected by multiple bolts (1). A sealing mounting groove (8) is provided at the bottom of the upper plane (2). A stepped protrusion (7) integral with the upper plane (2) is provided on the outer edge of the sealing mounting groove (8) extending downward. Only the bottom surface of the stepped protrusion (7) is in contact with the lower plane (4). The inner edge of the sealing mounting groove (8) is raised upward to form an opening. An O-ring (3) for sealing the gap between the upper plane (2) and the lower plane (4) is provided in the sealing mounting groove (8). An expansion structure is provided in the O-ring (3).

2. The novel planar sealing structure for improving sealing performance according to claim 1, characterized in that: The O-ring (3) is provided with a splicing protrusion (9), and the sealing mounting groove (8) is provided with a splicing groove (10) corresponding to the splicing protrusion (9). The splicing protrusion (9) extends into the splicing groove (10) and engages.

3. The novel planar sealing structure for improving sealing performance according to claim 1, characterized in that: The expansion structure includes a hollow cavity (11) disposed inside the O-ring (3) and a plurality of ventilation channels (12) that connect the hollow cavity (11) to the opening.

4. The novel planar sealing structure for improving sealing performance according to claim 1, characterized in that: The shape and size of the O-ring (3) match the shape and size of the sealing mounting groove (8).

5. A novel planar sealing structure for improving sealing performance according to claim 2, characterized in that: The splicing protrusion (9) and the O-ring (3) are integrally formed into a single structure.

6. A novel planar sealing structure for improving sealing performance according to claim 1, characterized in that: An annular outer groove (5) is formed on the outer side of the stepped protrusion (7) between the upper plane body (2) and the lower plane body (4). A matching outer sealing ring (6) is provided in the annular outer groove (5), and the outer sealing ring (6) is made to fit with the upper plane body (2) and the lower plane body (4) by means of a screw bolt (1).

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