Automatic compensation wear-resistant sealing butterfly valve

Abstract

The utility model provides an automatic compensation wear-resistant sealing butterfly valve, and relates to the technical field of valves, the number of U-shaped elastic sealing seats is two, two semicircles are oppositely arranged, and the plane ends of the two U-shaped elastic sealing seats are arranged between a pressing plate and a radial convex shoulder. The semi-arc ends of the two U-shaped elastic sealing seats abut against the inner wall of the pressing plate and the inner wall of the radial protruding shoulder respectively, the rod portion of the adjusting screw penetrates through the pressing plate and the U-shaped elastic sealing seats, and the penetrating ends of the adjusting screw are in threaded connection with the radial protruding shoulder. The spring is stretched to generate extra elastic force to push the U-shaped elastic sealing seat, so that the U-shaped elastic sealing seat is continuously and tightly attached to the butterfly plate, the abrasion of a sealing pair is compensated, and good sealing performance is maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially automatic compensation wear -resisting sealing butterfly valve. BACKGROUND

[0002] The conventional sealing butterfly valve is in the open valve and close valve state for a long time in the use project, and the sealing part is prone to wear, and once the wear reaches a certain amount, the valve will leak, and the product maintenance cost is high and the service life is short.

[0003] Therefore, the prior art automatic compensation wear-resistant bidirectional sealing butterfly valve with publication number CN213685320U adopts the automatic compensation type movable valve seat structure, and after the sealing pair is worn, the adjusting screw on the valve seat is adjusted to compress the U-shaped elastic sealing seat, the elastic force generated by the U-shaped elastic sealing seat is used to automatically compensate the wear of the sealing pair, a good seal is reformed, and the sealing is reliable, the product maintenance cost is low, and the service life is long.

[0004] In the practical application of the butterfly valve, the problem of not timely compensation after the sealing pair is worn is more prominent, which greatly increases the risk of valve leakage, and the elastic attenuation of the U-shaped elastic sealing seat also continuously affects the sealing performance, greatly shortens the service life of the butterfly valve and increases the use cost. UTILITY MODEL CONTENTS

[0005] The utility model discloses a valve that solves the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an automatic compensation wear-resistant sealing butterfly valve, comprising a valve body, a butterfly plate, a valve seat and a valve stem, the valve body, the butterfly plate and the valve stem form a three-eccentric structure, the valve seat adopts an automatic compensation type movable valve seat, the automatic compensation type movable valve seat is composed of a U-shaped elastic sealing seat, a pressing plate and an adjusting screw, the U-shaped elastic sealing seat is composed of a flat end bottom connected with a semicircle, and further comprises a radial shoulder.

[0007] The U-shaped elastic sealing seat is provided with two semicircles arranged oppositely, the flat ends of the two U-shaped elastic sealing seats are arranged between the pressing plate and the radial shoulder, the semicircle ends of the two U-shaped elastic sealing seats are respectively pressed on the inner walls of the pressing plate and the radial shoulder, the rod part of the adjusting screw penetrates through the pressing plate and the U-shaped elastic sealing seat and is threadedly connected with the radial shoulder at the penetrating end, the side of the pressing plate and the radial shoulder facing the U-shaped elastic sealing seat is provided with a mounting groove, a spring is arranged in the mounting groove and sleeved with the adjusting screw, and one end of the spring is fixed with the U-shaped elastic sealing seat.

[0008] Preferably, the inlet of the valve body is provided with a filter plate, and the filter plate is made of a corrosion-resistant metal material.

[0009] Preferably, the valve body is internally provided with a stepped protruding ring, and the stepped protruding ring is provided with a stepped surface.

[0010] Preferably, the stepped protruding ring is internally provided with an annular groove, and the stepped protruding ring is externally provided with an annular groove.

[0011] Preferably, the filter plate is externally provided with an outwardly extending edge, and the outwardly extending edge is in abutment with the side of the stepped protruding ring away from the stepped surface.

[0012] Preferably, the side of the stepped protruding ring away from the stepped surface is threadedly connected with a fixing screw, and the stepped protruding ring is fixedly installed with the outwardly extending edge through the fixing screw.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that,

[0014] 1、The utility model discloses a long -term use leads to U type elastic sealing seat elasticity attenuation, and spring will be further stretched, and the extra elastic force that spring is stretched pushes U type elastic sealing seat, makes it continue tightly and closely combined butterfly board, compensates the wear of sealing pair, maintains good sealing performance.

[0015] 2、The utility model discloses a butterfly valve closes, and butterfly board is tightly and closely combined with both sides' U type elastic sealing seat, and two U type elastic sealing seat semicircular arc reverse setting is pressed on the inner wall of radial shoulder and pressure plate respectively, and under the action of self -elastic force, forms sealing pair with butterfly board, prevents medium leakage. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides an automatic compensation wear -resisting sealing butterfly valve three -dimensional structure schematic diagram for the utility model;

[0017] Figure 2 The utility model discloses a side sectional three -dimensional structure schematic diagram for the utility model Figure 1 ;

[0018] Figure 3 The utility model discloses an enlarged view of A in Figure 2 ;

[0019] Figure 4 The utility model discloses an enlarged view of B in Figure 2 ;

[0020] Legend: 1, valve body;2, filter plate;3, butterfly board;4, stepped protruding ring;5, U type elastic sealing seat;6, radial shoulder;7, pressure plate;8, annular groove;9, O type ring;10, installation groove;11, adjusting screw;12, spring;13, outwardly extending edge;14, stepped surface;15, fixing screw. DETAILED DESCRIPTION

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] like Figures 1-4 As shown, the automatic compensation wear-resistant sealing butterfly valve includes a valve body 1, a butterfly plate 3, a valve seat, and a valve stem. The valve body 1, butterfly plate 3, and valve stem form a triple eccentric structure. The valve seat adopts an automatic compensation movable valve seat. The automatic compensation movable valve seat is composed of a U-shaped elastic sealing seat 5, a pressure plate 7, and an adjusting screw 11. The U-shaped elastic sealing seat 5 is composed of a semi-circular arc connected to the bottom of the flat end, and also includes a radial shoulder 6.

[0024] Two U-shaped elastic sealing seats 5 are provided, and the two semicircular arcs are arranged oppositely. The flat ends of the two U-shaped elastic sealing seats 5 are located between the pressure plate 7 and the radial shoulder 6. The semicircular ends of the two U-shaped elastic sealing seats 5 press against the inner walls of the pressure plate 7 and the radial shoulder 6 respectively. The rod of the adjusting screw 11 passes through the pressure plate 7 and the U-shaped elastic sealing seat 5, and the through end is threadedly connected to the radial shoulder 6. The pressure plate 7 and the radial shoulder 6 have a mounting groove 10 on the side facing the U-shaped elastic sealing seat 5. A spring 12 is provided in the mounting groove 10 and is sleeved and installed with the adjusting screw 11. One end of the spring 12 is fixed to the U-shaped elastic sealing seat 5, and the other end is fixed to the inner side of the mounting groove 10.

[0025] In this technical solution, by setting a spring 12, when the elasticity of the U-shaped elastic sealing seat 5 decreases due to long-term use, the spring 12 is further stretched to provide additional elastic force to enhance the sealing compensation effect. By using two U-shaped elastic sealing seats 5, the sealing performance can be improved. When one U-shaped elastic sealing seat 5 is worn, the other can still maintain a certain sealing effect, and can also share the pressure, reduce the burden on a single U-shaped elastic sealing seat 5, delay the elasticity decay, and at the same time enhance the bidirectional sealing capability to ensure the sealing reliability in both directions.

[0026] In addition, to ensure sealing performance, sealing gaskets are provided between the pressure plate 7 and the U-shaped elastic sealing seat 5, between the U-shaped elastic sealing seats 5 and 5, and between the radial shoulder 6 and the U-shaped elastic sealing seat 5.

[0027] like Figure 2 As shown, a filter plate 2 is installed at the inlet of the valve body 1, and the filter plate 2 is made of corrosion-resistant metal.

[0028] In the technical solution, when the medium enters the valve body 1 from the inlet, the medium first passes through the filter plate 2, and the impurities in the medium are blocked outside the filter plate 2, so that the impurities are prevented from entering the sealing area and the wear of the sealing pair is reduced, and the filter plate 2 is made of a corrosion-resistant metal material, so that the service life of the filter plate 2 is prolonged.

[0029] As shown in Figure 2 and Figure 4 , the inside of the valve body 1 is provided with a stepped protruding ring 4, the stepped protruding ring 4 is provided with a stepped surface 14, the stepped protruding ring 4 abuts one side of the filter plate 2 through the stepped surface 14, the one side of the filter plate 2 extends outward to form an outward extending edge 13, the outward extending edge 13 abuts the side of the stepped protruding ring 4 away from the stepped surface 14, the side of the stepped protruding ring 4 away from the stepped surface 14 is threadedly connected with a fixing screw 15, and the stepped protruding ring 4 is fixedly installed with the outward extending edge 13 through the fixing screw 15.

[0030] In the technical solution, the stepped protruding ring 4 inside the valve body 1 provides an installation and positioning structure for the filter plate 2, the one side of the filter plate 2 abuts the stepped surface 14 of the stepped protruding ring 4, and the position of the filter plate 2 in the axial direction is determined; at the same time, the outward extending edge 13 of the filter plate 2 abuts the side of the stepped protruding ring 4 away from the stepped surface 14, and the filter plate 2 is further positioned in the radial direction, so that the filter plate 2 can be accurately installed in the valve body 1, the stability and accuracy of the installation are ensured, and displacement under the flow impact of the medium is avoided.

[0031] In addition, the side of the stepped protruding ring 4 away from the stepped surface 14 is threadedly connected with the fixing screw 15, when the fixing screw 15 is tightened, pressure is generated on the outward extending edge 13 of the filter plate 2, the outward extending edge 13 is tightly pressed on the stepped protruding ring 4, so that the filter plate 2 is firmly connected with the valve body 1, the threaded connection is convenient for installation and disassembly, when the filter plate 2 needs to be replaced or the inside of the valve body 1 needs to be maintained, the fixing screw 15 is only needed to be unscrewed, and the filter plate 2 can be conveniently taken out.

[0032] As shown in Figure 3 and Figure 4 , the inside of the stepped protruding ring 4 and the outside of the pressing plate 7 are both provided with ring grooves 8, O-rings 9 are arranged between the outside of the filter plate 2 and the stepped protruding ring 4 and between the inside of the valve body 1 and the pressing plate 7, and the O-rings 9 are embedded in the ring grooves 8 at the corresponding positions.

[0033] In the technical solution, the O-rings 9 are installed in the ring grooves 8 between the stepped protruding ring 4 and the filter plate 2 and between the pressing plate 7 and the valve body 1, and are in a pre-compressed state, when the medium pressure acts, the O-rings 9 will be elastically deformed under the pressure, further fill the small gaps between the components, form an effective sealing barrier, prevent the medium from leaking, and ensure the sealing performance of the butterfly valve.

[0034] Working principle: long-term use causes the U-shaped elastic sealing seat 5 to be attenuated, the spring 12 is further stretched, the extra elastic force generated by the spring 12 pushes the U-shaped elastic sealing seat 5, so that the U-shaped elastic sealing seat 5 continues to closely fit the butterfly plate 3, compensates the wear of the sealing pair, and maintains good sealing performance.

[0035] The above is only the preferred embodiment of the present application, and does not limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technology content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still belongs to the protection scope of the technical scheme of the present application.

Claims

1. An automatic compensation wear-resistant sealing butterfly valve, comprising a valve body (1), a butterfly plate (3), a valve seat, and a valve rod, the valve body (1), the butterfly plate (3) and the valve rod form a three-eccentric structure, the valve seat adopts an automatic compensation movable valve seat, the automatic compensation movable valve seat is composed of a U-shaped elastic sealing seat (5), a pressing plate (7), and an adjusting screw (11), the U-shaped elastic sealing seat (5) is composed of a flat end bottom connected with a semicircular arc, and further comprises a radial shoulder (6), characterized in that: the U-shaped elastic sealing seat (5) is provided with two semicircular arcs arranged oppositely, the flat end of the two U-shaped elastic sealing seats (5) is arranged between the pressing plate (7) and the radial shoulder (6), the semicircular end of the two U-shaped elastic sealing seats (5) is respectively pressed on the inner wall of the pressing plate (7) and the radial shoulder (6), the rod of the adjusting screw (11) penetrates through the pressing plate (7) and the U-shaped elastic sealing seat (5) and is threadedly connected with the penetrating end of the radial shoulder (6), a mounting groove (10) is formed on the side of the pressing plate (7) and the radial shoulder (6) facing the U-shaped elastic sealing seat (5), a spring (12) is arranged in the mounting groove (10) and is sleeved and mounted with the adjusting screw (11), and one end of the spring (12) is fixed with the U-shaped elastic sealing seat (5). The inlet of the valve body (1) is provided with a filter plate (2), and the filter plate (2) is made of a corrosion-resistant metal material.

2. The self-compensating wear-resistant seal butterfly valve of claim 1, wherein: The inner side of the valve body (1) is provided with a stepped convex ring (4), the stepped convex ring (4) is provided with a stepped surface (14), and the stepped convex ring (4) abuts against one side of the filter plate (2) through the stepped surface (14).

3. The self-compensating wear-resistant seal butterfly valve of claim 1, wherein: The inner side of the stepped convex ring (4) and the outer side of the pressing plate (7) are both provided with a ring groove (8), O-rings (9) are arranged between the outer side of the stepped convex ring (4) and the filter plate (2) and between the outer side of the pressing plate (7) and the inner side of the valve body (1), and the O-rings (9) are embedded in the ring grooves (8) at the close positions.

4. The self-compensating wear-resistant seal butterfly valve of claim 1, wherein: One side of the filter plate (2) extends outward to form an extended edge (13), and the extended edge (13) abuts against one side of the stepped convex ring (4) away from the stepped surface (14).

5. The self-compensating wear-resistant seal butterfly valve of claim 3, wherein: The side of the stepped convex ring (4) away from the stepped surface (14) is threadedly connected with a fixing screw (15), and the stepped convex ring (4) is fixedly installed with the extended edge (13) through the fixing screw (15).

6. The self-compensating wear-resistant seal butterfly valve of claim 5, wherein: ​

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