A new type of winding pad with filter

Abstract

The utility model relates to a new type of winding pad with a filter screen, comprising an inner ring, an outer ring and a winding pad, the winding pad is arranged between the inner ring and the outer ring, the winding pad is composed of a metal belt and a filling belt alternately spirally wound, the outer ring of the inner ring is provided with a notch groove, the notch groove is arc-shaped, the end face of the inner ring is provided with a positioning groove, the notch groove and the positioning groove are connected, the inner end of the winding pad extends along the notch groove and is inserted into the positioning groove, and is positioned and locked by a locking bolt, both sides of the inner ring of the inner ring are provided with a step platform, two filter screens are installed side by side on the step platform, a tension spring is arranged between the two filter screens, the tension spring is annular, and abuts against the inner side of the filter screen. The positioning groove cooperates with the locking bolt to fix the end of the winding pad, without welding, to ensure the tightness of the winding of the winding pad, the double-layer filter screen is installed and set by the step platform to ensure the filtering effect, and the tension spring serves as an elastic support between the double-layer filter screens to avoid damage to the filter screen caused by uneven fluid pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of wound gaskets, in particular to a novel wound gasket with a filter screen. Background Art

[0002] Metal wound gaskets are a widely used sealing gasket with the best resilience among semi-metallic sealing gaskets. They are made of V-shaped or W-shaped thin steel strips alternately wound with various fillers. They are resistant to high temperature and high pressure and can be used under ultra-low temperature or vacuum conditions. By changing the material combination of the gasket, the problem of chemical corrosion of the gasket by various media can be solved. The existing winding tape is usually welded to the end of the inner ring and the outer ring. Affected by the welding quality, the welding point ages and corrodes over time, and the reliability decreases, causing the winding tape to loosen. In addition, the existing wound gasket has a filter screen integrated in the middle. The filter screen is mostly a single-layer setting. Affected by the scouring of the fluid in the pipeline, the filter screen is prone to large deformation, and severe cases may even cause partial mesh breakage, so it needs to be improved. Utility Model Content

[0003] Based on this, it is necessary to provide a new type of winding pad with a filter to address the above problems.

[0004] A new type of winding pad with a filter screen comprises an inner ring, an outer ring and a winding pad, the winding pad is arranged between the inner ring and the outer ring, the winding pad is composed of a metal belt and a filling belt alternately wound in a spiral manner, the outer ring of the inner ring is provided with a notch groove, the notch groove is arc-shaped, the end face of the inner ring is provided with a positioning groove, the notch groove and the positioning groove are connected, the inner end of the winding pad extends along the notch groove and is inserted into the positioning groove, and is positioned and locked by a locking bolt, both sides of the inner ring of the inner ring are provided with stepped platforms, two filter screens are installed side by side on the stepped platforms at intervals, a tension spring is provided between the two filter screens, the tension spring is annular and abuts against the inner side of the filter screen.

[0005] Preferably, a plurality of pressing plates are provided on the side wall of the stepped platform, and the outer ring of the filter screen is provided with a pressing ring, and the pressing plates cooperate with the stepped platform to press the pressing ring.

[0006] Preferably, a layer of silicone pad is adhered to the end surfaces of the inner ring and the outer ring.

[0007] Preferably, the filling belt is made of polytetrafluoroethylene rubber pad.

[0008] The benefits of the utility model lie in that the end of the wound pad is fixed by using the positioning groove in combination with the locking bolt, without the need for welding, thereby ensuring the tightness of the wound pad, and the structure is simple. A double-layer filter screen is installed on a stepped platform to ensure the filtering effect, and a tension spring is used as an elastic support between the double-layer filter screens, which helps to reduce local damage to the filter screen caused by uneven fluid pressure without affecting the filtering efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a three-dimensional schematic diagram of a new type of winding pad with a filter screen according to one embodiment;

[0010] Figure 2 It is a front view schematic diagram of a new type of winding pad with a filter. DETAILED DESCRIPTION

[0011] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0012] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0014] like Figures 1-2As shown, a new type of winding pad with a filter screen comprises an inner ring 1, an outer ring 2 and a winding pad 3, wherein the winding pad 3 is arranged between the inner ring 1 and the outer ring 2, and the winding pad 3 is composed of a metal belt and a filling belt alternately wound in a spiral manner, the outer ring of the inner ring 1 is provided with a notch groove 11, and the notch groove 11 is arc-shaped, and the end face of the inner ring 1 is provided with a positioning groove 12, and the notch groove 11 is connected to the positioning groove 12, and the inner end of the winding pad 3 extends along the notch groove 11 and is inserted into the positioning groove 12, and is positioned and locked by a locking bolt 5, and stepped platforms 13 are provided on both sides of the inner ring of the inner ring 1, and two filter screens 4 are installed side by side on the stepped platforms 13 at intervals, and a tension spring 41 is provided between the two filter screens 4, and the tension spring 41 is annular and abuts against the inner side of the filter screen 4. Specifically, in this embodiment, we have a notch groove 11 on the outer ring of the inner ring 1. The notch groove 1 is arc-shaped, so that the inner end of the winding pad 3 can be directly extended and inserted into the notch groove 11 and enter the positioning groove 12. At this time, we screw the locking bolt 5. It can be understood that in order to keep the end face of the inner ring 1 in a flat shape, we use a countersunk locking bolt 5 and a nut to clamp the end of the winding pad 3 to prevent it from loosening during winding. At the same time, in order to achieve the filtering effect of the fluid in the pipeline, we set a filter screen 4 on the inner ring 1. In order to install the filter screen 4, the inner ring 1 has a stepped platform 13. Two filter screens 4 are installed on the stepped platform 13. The double-layer filter screen 4 ensures a good filtering effect. Even if one filter screen is damaged, it will not affect the filtering effect. There is a gap between the two filter screens 4. We curl the tension spring 41 into a ring shape and fill it between the two filter screens 4 to provide an elastic support for the filter screen 4 to prevent the filter screen 4 from being compressed, deformed or even damaged by the unstable eddy current in the fluid when the fluid is flushed back and forth. The tension spring 41 will not affect the normal passage of the fluid, thereby ensuring the filtering efficiency of the fluid.

[0015] like Figures 1-2 As shown, a plurality of pressing sheets 131 are provided on the side wall of the step platform 13, and a pressing ring 42 is provided on the outer ring of the filter screen 4, and the pressing sheet 131 cooperates with the step platform 13 to press the pressing ring 42. Specifically, in this embodiment, the pressing sheet 131 has a certain elasticity, and during assembly, the pressing ring 42 of the filter screen 4 is pressed and squeezed into the gap between the pressing sheet 131 and the step platform 13, and the pressing sheet 131 can press the filter screen 4, without the need for welding or bolting, and the assembly is extremely convenient and quick.

[0016] Specifically, a layer of silicone pad is adhered to the end faces of the inner ring 1 and the outer ring 2, so that the end faces of the inner ring 1 and the outer ring 2 are in flexible contact with the flange surface, reducing wear between the contact surfaces, extending the service life, and reducing the risk of leakage.

[0017] Specifically, the filling belt is made of polytetrafluoroethylene rubber pad.

[0018] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A new type of winding pad with filter screen, characterized by: It includes an inner ring, an outer ring and a winding pad, the winding pad is arranged between the inner ring and the outer ring, the winding pad is composed of a metal belt and a filling belt alternately wound in a spiral manner, the outer ring of the inner ring is provided with a notch groove, the notch groove is arc-shaped, the end face of the inner ring is provided with a positioning groove, the notch groove and the positioning groove are connected, the inner end of the winding pad extends along the notch groove and is inserted into the positioning groove, and is positioned and locked by a locking bolt, both sides of the inner ring of the inner ring are provided with stepped platforms, two filter screens are installed side by side on the stepped platforms, a tension spring is provided between the two filter screens, the tension spring is annular, and abuts against the inner side of the filter screen.

2. A novel spiral wound pad with a filter as claimed in claim 1, characterized in that: A plurality of pressing sheets are arranged on the side wall of the stepped platform, and the outer ring of the filter screen is provided with a pressing ring, and the pressing sheet cooperates with the stepped platform to press the pressing ring tightly.

3. A novel spiral wound pad with a filter as claimed in claim 1, characterized in that: A layer of silicone pad is adhered to the end surfaces of the inner ring and the outer ring.

4. A novel spiral wound pad with a filter as claimed in claim 1, characterized in that: The filling belt is made of polytetrafluoroethylene rubber pad.

Images