Flange sealing rubber ring

Abstract

The utility model discloses a flange sealing rubber ring, an annular groove matched with a plug piece is processed on the outer circumferential surface of the rubber ring, if a flange plate deflects, the plug piece is inserted into the groove, and the thickness of the plug piece corresponds to a butt joint gap of the flange plate. If the rubber ring is solid, the width of the outer circumferential surface of the rubber ring is larger than that of the inner circumferential surface of the rubber ring, such as trapezoid or triangle, and the grooves are V-shaped. If the rubber ring is hollow, the middle size of the section of the rubber ring is larger than the sizes of the two ends, such as circle, ellipse or rhombus. Sealing is achieved through deformation of the rubber ring, and deflection sealing installation of the flange plate is achieved by plugging the plugging piece into the groove.

Description

Technical Field

[0001] The utility model is applied to the field of pipelines and relates to a sealing connection of pipelines, in particular to a sealing rubber ring applied to flange connections. Background Art

[0002] There are many ways to connect pipelines, among which flange rigid connection accounts for the largest proportion, especially for valves, expansion joints, etc., which all use flange connection. When connecting flanges, the parallelism between the two butt flanges should be maintained. If there is deflection, it should not be eliminated by tightening the bolts. Therefore, the processing of the flange sealing surface should be perpendicular to the center line of the pipe mouth. For welded flanges, it is not uncommon for flange connection to be deflected due to construction errors. The usual practice is to cut off the flange and re-weld it, which greatly reduces the efficiency of pipeline installation.

[0003] There are many patent applications for flange sealing rings. For example, CN104455847B provides a sealing ring for railway freight car flanges. A V-shaped groove is arranged around the inner side of the rubber ring, and a V-shaped bimetallic spring sheet is arranged close to the inner wall of the groove. An annular positioning block is arranged on the inner side of the bimetallic spring sheet. The sealing ring allows the railway freight car to maintain a sealing effect at low temperatures. CN210462055U discloses a flange sealing ring that is easy to install. The sealing ring body includes a top ring, a connecting ring and a bottom ring. The top of the top ring and the bottom of the bottom ring are both spaced apart with fixing plates. A connecting end is provided on one side of the surface. A convex block is provided at the top of the first connecting edge. A plug rod is spaced apart at the top of the convex block. A groove is provided on the second connecting edge. Several slots are provided in the groove and at symmetrical positions of the plug rod. A through hole is provided on the surface of the convex block. Connecting convex rods are provided on the inner walls of both sides of the groove. The arrangement of the convex block and the groove, the plug rod and the slot, and the connecting convex rod and the through hole ensures that the sealing ring body is firmly connected. CN212107359U discloses a sealing rubber ring for water pipe flange connection, wherein the opposite side faces of the flange are provided with clamping blocks, the clamping blocks are sealed with a first rubber ring, and the inner annular surface of the flange is sealed with a second rubber ring. CN218208282U discloses a pipeline sealing connection structure, which uses a sealing ring structure similar to that of CN212107359U, except that there is no sealing groove and support ring.

[0004] The above-mentioned flange sealing rings cannot solve the sealing problem when the flange is installed obliquely. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a flange sealing rubber ring which can adapt to the skewed installation of the flange and ensure the sealing performance.

[0006] The technical solution adopted by the utility model is that an annular groove is processed on the outer circumference of the flange sealing rubber ring, and the groove cooperates with the plug. If the flange is installed obliquely, the plug is inserted into the groove of the rubber ring, and the thickness of the plug corresponds to the butt gap of the flange, which can be a plurality of plugs of different thicknesses or a plug with a gradually transitioning thickness.

[0007] Preferably, the rubber ring is solid, the width of the outer circumference of the rubber ring is greater than the width of the inner circumference, and the groove cross section is V-shaped. The cross section of the rubber ring is preferably trapezoidal or triangular.

[0008] Preferably, the rubber ring is hollow, which is equivalent to expanding the bottom of the groove. The middle size of the cross section of the rubber ring is larger than the sizes at both ends, and is preferably circular, elliptical, or diamond-shaped.

[0009] The beneficial effects of the utility model are as follows: the utility model utilizes the deformation of the rubber ring to realize sealing, inserts a plug into the groove to adapt to the deflection of the flange, and realizes the deflected sealing installation of the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a front view schematic diagram of embodiment 1;

[0011] Figure 2 This is a schematic diagram of the installation of Example 1;

[0012] Figure 3 is a front view schematic diagram of Embodiment 2;

[0013] Figure 4 This is a schematic diagram of the installation of Example 2;

[0014] Among them: 1- rubber ring, 2- groove, 3- plug, 4- flange, 5- fastener, 6- cavity. DETAILED DESCRIPTION

[0015] The flange is usually circular. The utility model uses a circular rubber ring as an example in the attached figure, but is not limited to a circular shape.

[0016] Example 1.

[0017] The structure of the sealing rubber ring in this embodiment is as shown in the attached figure. Figure 1 As shown, the cross section of the rubber ring 1 is a trapezoid, which is wide outside and narrow inside, and an annular groove 2 is processed on the outer circumference, and the groove 2 is V-shaped.

[0018] Attached Figure 2This is the installation diagram of this embodiment. The lower part of the figure is a schematic diagram of the installation of the flange without deflection, and also a schematic diagram of the installation of the deflected flange with a small butt gap. After the fastener 5 fastens the two flanges 4, the groove 2 is tightly closed, and the flange is sealed by the deformation of the rubber ring 1. The upper part of the figure is a schematic diagram of the installation of the deflected flange with a large butt gap. The plug 3 is inserted into the groove to increase the width of the rubber ring, and then the fastener 5 fastens the two flanges 4, and the deformation of the rubber ring 1 is used to seal the flange to form a sealed connection of the pipeline.

[0019] Since the butt joint gap of the skewed flange gradually transitions from small to large, the thickness of the plug 3 should be gradually transitioned, corresponding to the butt joint gap. A plurality of plugs of different thicknesses can be used, or a plug with a gradually transitioned thickness can be processed.

[0020] The rubber ring of this embodiment is not limited to a trapezoidal shape, and may also be made into a triangle, or other shapes that are wide outside and narrow inside, that is, the width of the outer circumference is greater than the width of the inner circumference.

[0021] Example 2.

[0022] The structure of the sealing rubber ring in this embodiment is as shown in the attached figure. Figure 3 As shown, the cross section of the rubber ring 1 is a hollow circle, and an annular groove 2 is processed on the outer circumference. The hollowness is equivalent to expanding the bottom of the groove 2 by air to form a cavity 6.

[0023] Attached Figure 4 This is a schematic diagram of the installation of this embodiment. The lower part of the figure is a schematic diagram of the installation of the flange without deflection, and is also a schematic diagram of the installation of the deflected flange with a small butt gap. After the fastener 5 fastens the two flanges 4, the groove 2 is tightly closed, and the flange is sealed by the deformation of the rubber ring 1. The upper part of the figure is a schematic diagram of the installation of the deflected flange with a large butt gap. The plug 3 is inserted into the groove. When the fastener 5 fastens the two flanges 4, the cavity 6 is tightly closed, the rubber ring 1 contacts the plug 3, and the deformation of the rubber ring 1 is used to seal the flange, forming a sealed connection of the pipeline.

[0024] The rubber ring of this embodiment is not limited to a circle, and can also be made into an ellipse, a diamond, or other shapes with a cross-section that is wide in the middle (the part that contacts the flange sealing surface) and narrow at both ends (inner and outer circumferential surfaces), that is, the size of the middle is larger than the size of the two ends.

[0025] The utility model utilizes the deformation of the rubber ring to realize sealing, and a plug is inserted into the groove to increase the width of the rubber ring to adapt to the deflection of the flange, thereby realizing the deflection sealing installation of the flange.

Claims

1. A flange sealing rubber ring, characterized in that: An annular groove is processed on the outer circumferential surface, and the groove cooperates with the plug.

2. The flange sealing rubber ring according to claim 1, characterized in that: The width of the outer circumferential surface of the rubber ring is greater than the width of the inner circumferential surface, and the cross section of the groove is V-shaped.

3. The flange sealing rubber ring according to claim 2, characterized in that: The cross section of the rubber ring is trapezoidal or triangular.

4. The flange sealing rubber ring according to claim 1, characterized in that: The rubber ring is hollow, and the size of the middle part of the cross section is larger than the sizes of the two ends.

5. The flange sealing rubber ring according to claim 4, characterized in that: The cross section of the rubber ring is circular, elliptical or rhombus-shaped.

6. The flange sealing rubber ring according to claim 1, characterized in that: When the rubber ring is installed, a plug is inserted into the groove, and the thickness of the plug corresponds to the butt clearance of the flange.

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