Low-load three-eccentric hard sealing butterfly valve

Abstract

The utility model discloses a low-load three-eccentric hard sealing butterfly valve which comprises a valve body, a butterfly plate is movably arranged on the inner wall of the valve body, a butterfly sheet is movably arranged on one side of the butterfly plate, a valve seat is fixedly arranged on the inner wall of the valve body, the valve seat is clamped with the butterfly sheet, a reinforcing sheet is movably arranged on one side of the butterfly sheet, the reinforcing sheet is in threaded connection with the butterfly sheet, and the valve seat is fixedly arranged on the inner wall of the valve body. A limiting groove is formed in the butterfly piece, a sealing ring is fixedly arranged in the limiting groove, and alloy sealing grooves are fixedly formed in the two sides of the valve body. In the process that the butterfly plate is driven to seal the integral butterfly valve, the reinforcing piece is installed on the disc on the surface of the butterfly plate in a threaded mode, the pressure relief groove formed in the center of the surface of the reinforcing piece is parallel to the inner side of the valve body, direct opposite-flushing water flow is kept parallel, and the water flow enters the pressure relief groove and then rushes out of a plurality of opposite-flushing holes in the outer side. The direct-current pressure of the flushing water flow is reduced, and the sealing pressure of the flushing water flow on the sealing ring and the valve seat is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealed butterfly valve especially relates to low load three eccentric hard sealing butterfly valve. BACKGROUND

[0002] The butterfly valve is also called a flap valve, and it is a simple structure regulating valve, and the butterfly valve is used for the on-off control of low-pressure pipeline medium, and the butterfly valve is a valve with a disc-shaped closing element (valve disc or butterfly plate) rotating around a valve shaft to achieve opening and closing, and the valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. The butterfly valve mainly plays a role of cutting off and throttling on the pipeline. The opening and closing element of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening, closing or adjusting. The valve rod axis is offset from the center of the disc and the center of the body, and the valve seat rotation axis and the valve body passage axis have a certain angle, which is called three eccentric butterfly valve.

[0003] The existing three eccentric hard sealing butterfly valve is prone to being damaged under the pressure of straight-flow water, and the disc is prone to being damaged under the load of straight-flow water.

[0004] Therefore, the low load three eccentric hard sealing butterfly valve is provided. UTILITY MODEL CONTENTS

[0005] The utility model discloses a low load three eccentric hard sealing butterfly valve, which is provided to solve the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The low load three eccentric hard sealing butterfly valve comprises a valve body, a butterfly plate movably arranged on the inner wall of the valve body, a disc movably arranged on one side of the butterfly plate, a valve seat fixedly arranged on the inner wall of the valve body, the disc and the valve seat being engaged, a reinforcing plate movably arranged on one side of the disc, the reinforcing plate and the disc being threadedly connected, a limiting groove formed in the disc, a sealing ring fixedly arranged in the limiting groove, and alloy sealing grooves fixedly arranged on both sides of the valve body.

[0008] As a further scheme of the utility model, a support groove is fixedly arranged at the top end of the valve body, a rotatable valve rod is arranged in the vertical direction of the central axis of the valve body, the valve rod penetrates through the support groove and the butterfly plate and is fixed, the support groove is sealed at the top end of the valve body, and a hand wheel is fixedly arranged at the top end of the valve rod.

[0009] As a further scheme of the utility model, a sealing slope is formed in the inner wall of the valve seat, the sealing slope and the sealing ring are engaged, the sealing ring is made of rubber material with certain elasticity and corrosion resistance, and the limiting groove and the sealing ring are engaged.

[0010] As a further scheme of the utility model: the butterfly piece one side is equipped with threaded hole, the reinforcing sheet and butterfly piece are connected by means of threaded hole thread, the reinforcing sheet center is equipped with pressure relief groove, the reinforcing sheet surface is equipped with several pairs of punch hole, several pairs of punch hole are communicated with pressure relief groove.

[0011] As a further scheme of the utility model: the sealing slope is semicircular in plan view, and is recessed inwardly in the inner wall of the valve seat, and the sealing ring is protruded outwardly.

[0012] As a further scheme of the utility model: the alloy sealing groove material should have certain corrosion resistance, the alloy sealing groove is inserted into the valve body opening and is connected by threads, several fixing grooves are formed in the opening of the alloy sealing groove, and the fixing grooves are used for flange connection with other pipelines.

[0013] As a further scheme of the utility model: the opening of the alloy sealing groove is provided with a plug-in port, the plug-in port is recessed inwardly in the alloy sealing groove, and is surrounded outwardly by the fixing grooves.

[0014] Compared with the prior art, the utility model provides low load three eccentric hard sealing butterfly valve, has the following beneficial effects:

[0015] In the process that the butterfly plate drives the whole sealing butterfly valve, the reinforcing sheet is installed on the surface of the butterfly plate by threads, the pressure relief groove in the center of the surface of the reinforcing sheet is parallel to the inner side of the valve body, the directly colliding water flow is kept parallel, the water flow enters the pressure relief groove and collides with the several pairs of punch holes on the outer side, the direct current pressure of the colliding water flow is reduced, and the sealing pressure of the sealing ring and the valve seat by the colliding water flow is reduced.

[0016] The parts not involved in the device are the same as or can be realized by the prior art, the utility model has the advantages of simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of low load three eccentric hard sealing butterfly valve provided by the utility model;

[0018] Figure 2 It is the structure schematic diagram of butterfly plate of low load three eccentric hard sealing butterfly valve provided by the utility model;

[0019] Figure 3 This is a top view schematic diagram of the sealing structure of the valve seat and butterfly disc of the low-load triple eccentric hard seal butterfly valve proposed in this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the alloy sealing groove of the low-load triple eccentric hard-seal butterfly valve proposed in this utility model.

[0021] In the diagram: 1. Valve body; 2. Butterfly plate; 3. Butterfly disc; 4. Valve seat; 5. Reinforcing plate; 6. Limiting groove; 7. Sealing ring; 8. Alloy sealing groove; 9. Bracket groove; 10. Valve stem; 11. Handwheel; 12. Sealing slope; 13. Threaded hole; 14. Pressure relief groove; 15. Punching hole; 16. Fixing groove; 17. Insertion port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example: Low-load triple eccentric hard-seal butterfly valve, such as Figures 1-4 As shown, the valve includes a valve body 1, a butterfly plate 2 movably disposed on the inner wall of the valve body 1, a butterfly blade 3 movably disposed on one side of the butterfly plate 2, a valve seat 4 fixedly disposed on the inner wall of the valve body 1, the valve seat 4 engaging with the butterfly blade 3, a reinforcing plate 5 movably disposed on one side of the butterfly blade 3, the reinforcing plate 5 being threadedly connected to the butterfly blade 3, a limit groove 6 being formed on the butterfly blade 3, a sealing ring 7 being fixedly disposed in the limit groove 6, alloy sealing grooves 8 being fixedly disposed on both sides of the valve body 1, a bracket groove 9 being fixedly disposed at the top of the valve body 1, a rotatable valve stem 10 being disposed vertically on the central axis of the valve body 1, the valve stem 10 passing through the bracket groove 9 and the butterfly plate 2 and fixedly disposed therethrough, the bracket groove 9 sealing the top of the valve body 1, and a handwheel 11 being fixedly disposed at the top of the valve stem 10.

[0025] like Figures 1-4As shown, the inner wall of the valve seat 4 is provided with a sealing slope 12, the sealing slope 12 is engaged with the sealing ring 7, the sealing ring 7 is made of rubber material with certain elasticity and corrosion resistance, the limiting groove 6 is engaged with the sealing ring 7, one side of the butterfly plate 3 is provided with a threaded hole 13, the reinforcing plate 5 is threadedly connected with the butterfly plate 3 through the threaded hole 13, the reinforcing plate 5 is provided with a pressure relief groove 14 in the center, and a plurality of pairs of impact holes 15 are formed on the surface of the reinforcing plate 5 and communicated with the pressure relief groove 14, since the reinforcing plate 5 is threadedly installed on the surface of the butterfly plate 2, the pressure relief groove 14 formed in the center of the surface of the reinforcing plate 5 is parallel to the inner side of the valve body 1, and the parallel water flow is kept, and the water flow entering the pressure relief groove 14 is impacted out of the plurality of pairs of impact holes 15 on the outer side, thereby reducing the direct flow pressure of the impact water flow.

[0026] As shown in the figure, Figures 1-3 The sealing slope 12 is in a semicircular shape in plan view and is recessed inwardly in the inner wall of the valve seat 4, and the sealing ring 7 is protruded outwardly, the alloy sealing groove 8 should have certain corrosion resistance, the alloy sealing groove 8 is inserted into the opening of the valve body 1 and is threadedly connected, a plurality of fixing grooves 16 are formed at the opening of the alloy sealing groove 8, the fixing grooves 16 are used for flange connecting other pipelines, and a plug-in port 17 is formed at the opening of the alloy sealing groove 8, the plug-in port 17 is recessed inwardly of the alloy sealing groove 8 and is surrounded outwardly by the plurality of fixing grooves 16, since the plug-in port 17 is surrounded outwardly by the fixing grooves 16, the stability of the sealing connection is increased during the flange connection, and the long-term sealing reliability of the overall device is prolonged.

[0027] Working principle: the alloy sealing groove 8 is threadedly connected with the openings on both sides of the valve body 1, the fixing grooves 16 are flange connected with the installation pipelines, the sealing step is increased, the sealing effect of the hard sealing is enhanced, the plug-in port 17 is inserted into the inside, the water flow is blocked on the outside, the stability of the sealing connection is increased, and when the directly impacting water flow contacts the reinforcing plate 5 threadedly installed on the butterfly plate 2, the pressure relief groove 14 formed in the center of the surface of the reinforcing plate 5 is parallel to the inner side of the valve body 1, the water flow entering the pressure relief groove 14 is impacted out of the plurality of pairs of impact holes 15 on the outer side, the direct flow pressure of the water flow is reduced, and the service life of the equipment is increased.

[0028] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. Low load triple offset hard sealing butterfly valve comprising a valve body (1), characterized in that, The butterfly plate (2) is movably arranged on the inner wall of the valve body (1), one side of the butterfly plate (2) is movably arranged with a butterfly piece (3), the valve seat (4) is fixedly arranged on the inner wall of the valve body (1), the valve seat (4) is clamped with the butterfly piece (3), one side of the butterfly piece (3) is movably arranged with a reinforcing piece (5), the reinforcing piece (5) is threadedly connected with the butterfly piece (3), the butterfly piece (3) is provided with a limiting groove (6), the limiting groove (6) is fixedly arranged with a sealing ring (7), and the alloy sealing groove (8) is fixedly arranged on both sides of the valve body (1).

2. The low load triple offset hard seated butterfly valve of claim 1, wherein, The top end of the valve body (1) is fixedly provided with a support groove (9), the valve body (1) is vertically provided with a rotatable valve rod (10) at the center axis, the valve rod (10) penetrates the support groove (9) and the butterfly plate (2) and is fixed, the support groove (9) seals the top end of the valve body (1), and the valve rod (10) is fixedly provided with a hand wheel (11) at the top end.

3. The low load triple offset hard seated butterfly valve of claim 1 wherein, The inner wall of the valve seat (4) is provided with a sealing slope (12), the sealing slope (12) is clamped with the sealing ring (7), the sealing ring (7) is made of rubber material with certain elasticity and corrosion resistance, and the limiting groove (6) is clamped with the sealing ring (7).

4. The low load triple offset hard seated butterfly valve according to claim 3, wherein, The butterfly piece (3) is provided with a threaded hole (13) on one side, the reinforcing piece (5) is threadedly connected with the butterfly piece (3) through the threaded hole (13), the reinforcing piece (5) is provided with a pressure relief groove (14) at the center, and the surface of the reinforcing piece (5) is provided with a plurality of counter holes (15) which are communicated with the pressure relief groove (14).

5. The low load triple offset hard seated butterfly valve according to claim 4, wherein, The sealing slope (12) is in a semicircular shape in plan view and is recessed inwardly in the inner wall of the valve seat (4), and the sealing ring (7) is protruded outwardly.

6. The low load triple offset hard seated butterfly valve according to claim 5, wherein, The alloy sealing groove (8) is made of material with certain corrosion resistance, the alloy sealing groove (8) is inserted into the opening of the valve body (1) and is threadedly connected, a plurality of fixing grooves (16) are formed at the opening of the alloy sealing groove (8), and the fixing grooves (16) are used for flange connecting other pipelines.

7. The low load triple eccentric hard-sealed butterfly valve of claim 6, wherein, The opening of the alloy sealing groove (8) is provided with an insertion port (17), the insertion port (17) is recessed inwardly of the alloy sealing groove (8) and is surrounded outwardly by the fixing grooves (16).

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