Butterfly valve of novel sealing structure

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a novel butterfly valve with a sealing structure, which comprises a butterfly valve main body, a first butt flange is fixedly arranged behind the butterfly valve main body, a second butt flange is fixedly arranged in front of the butterfly valve main body, and circulating ports are fixedly arranged on the front side and the rear side of the butterfly valve main body. A valve rod is movably arranged on the lower portion of the inner side of the butterfly valve body, a butterfly plate is fixedly arranged on the outer side of the valve rod, a control rod is movably arranged on the upper portion of the butterfly valve body, a heat insulation layer is fixedly arranged in the butterfly valve body, and a sealing silica gel pad is fixedly arranged on the inner side of the butterfly valve body. According to the butterfly valve of the novel sealing structure, external and internal temperature propagation is isolated through the heat insulation layer, so that the problem that the sealing silica gel pad shrinks due to cold, and consequently the sealing effect of a device is poor is solved, and the heat insulation layer is made of heat insulation ceramic fibers and has the advantages of being good in high temperature resistance and corrosion resistance, not prone to aging and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field, concretely is butterfly valve of new type sealing structure. BACKGROUND

[0002] The butterfly valve is also called flap valve, and is a simple structure regulating valve, and can be used for on-off control of low-pressure pipeline medium. The butterfly valve is a valve with a disc-shaped closure member (valve disc or butterfly plate) that rotates around a valve shaft to achieve opening and closing. The butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. In the pipeline, it mainly plays the role of cutting off and throttling. The butterfly valve has a disc-shaped butterfly plate as the opening and closing member, which rotates around its own axis in the valve body to achieve opening, closing or adjustment. The butterfly valve is not only widely used in general industries such as petroleum, gas, chemical industry, and water treatment, but also applied to the cooling water system of thermal power plants.

[0003] The prior art patent document CN221443321U discloses a butterfly valve, which comprises a valve seat, a sealing ring fixedly connected inside the valve seat, a valve door provided on one side of the sealing ring, a limiting rod fixedly connected to the bottom end of the valve door, a sliding groove formed at the bottom end of the valve seat, the limiting rod movably clamped inside the sliding groove, a telescopic rod movably penetrating the top end of the valve seat, a connecting rod rotatably connected to the bottom end of the telescopic rod, and the connecting rod rotatably connected to one side of the valve door away from the telescopic rod. Through the cooperation between the second adjusting knob, the worm, the worm gear, the keyway and the key, the telescopic rod is driven to rotate, thereby driving the valve door to make eccentric rotation around the center axis of the limiting rod, controlling the opening or closing of the valve door. At the same time, when the valve door is opened, the first adjusting knob is rotated to drive the bolt to be screwed out upward, and the telescopic rod is moved upward at the same time. The connecting rod is connected, and the valve door is moved away from the sealing ring at the same time, so that the contact surface of the valve door and the sealing ring is separated, avoiding contact friction when the valve door is opened, thereby reducing the wear between the valve door and the sealing ring, and further improving the service life of the valve door.

[0004] In use, the existing technology usually uses a sealing rubber ring to seal the valve body. However, when used in a cold place, the sealing rubber ring will shrink due to the thermal expansion and contraction characteristics, which will reduce the sealing effect of the valve body. UTILITY MODEL CONTENTS

[0005] (I) Technical problems solved

[0006] The utility model discloses a novel butterfly valve of sealing structure aims at providing a novel butterfly valve of sealing structure to solve the problem of the sealing effect of the valve body being reduced due to the shrinkage of the sealing rubber ring caused by the thermal expansion and cold shrinkage when being used in a cold place in the background art.

[0007] (Two) technical scheme

[0008] To achieve the above object, the utility model provides the following technical scheme: a novel butterfly valve of sealing structure, including butterfly valve main part, the rear of butterfly valve main part is fixedly arranged with first docking flange, the front of butterfly valve main part is fixedly arranged with second docking flange, the front and rear sides of butterfly valve main part are fixedly arranged with flow pass, the inboard of butterfly valve main part is movably arranged with valve stem, the outside of valve stem is fixedly arranged with butterfly plate, the top of butterfly valve main part is movably arranged with control rod, the inside of butterfly valve main part is fixedly arranged with heat insulation layer, the inboard of butterfly valve main part is fixedly arranged with sealing silica gel pad, the top of butterfly valve main part inside is fixedly arranged with first movable bearing, the bottom of butterfly valve main part inside is fixedly arranged with second movable bearing.

[0009] Preferably, the first docking flange and the second docking flange are the same size and shape, and the flow-through holes of the first docking flange and the second docking flange are the same size as the flow-through openings.

[0010] Preferably, the upper surface of the valve stem is fixedly connected to the lower surface of the control rod.

[0011] Preferably, the material of the heat insulation layer is heat insulation ceramic fiber, which has good high-temperature resistance, corrosion resistance, and aging resistance.

[0012] Preferably, the sealing silica gel pad is slightly larger than the size of the butterfly plate.

[0013] Preferably, the outer movable shaft end of the first movable bearing is fixedly connected to the butterfly valve main body, and the inner movable shaft end of the first movable bearing is fixedly connected to the valve stem.

[0014] Preferably, the outer movable shaft end of the second movable bearing is fixedly connected to the butterfly valve main body, and the inner movable shaft end of the second movable bearing is fixedly connected to the valve stem.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. The novel butterfly valve of sealing structure uses a heat insulation layer to isolate the temperature transmission between the outside and the inside during use, thereby avoiding the shrinkage of the sealing silica gel pad caused by coldness, which leads to poor sealing effect of the device. The material of the heat insulation layer is heat insulation ceramic fiber, which has good high-temperature resistance, corrosion resistance, and aging resistance.

[0017] 2、The new sealing structure butterfly valve, through the first flange and the second flange to be connected with the installation of pipeline, more convenient in installation, and through the control rod to control the valve stem, thereby driving the butterfly plate to rotate, to control the communication of the butterfly valve body, the sealing silica gel pad is set, so that it can better guarantee the sealing effect of the butterfly plate and the butterfly valve body in use, so that the sealing effect is better in use, and the first movable bearing and the second movable bearing are used to limit the valve stem and assist the rotation, and the use effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 It is the sectional structure schematic diagram of the utility model;

[0020] Figure 3 It is the movable bearing local detail enlarged structure schematic diagram of the utility model;

[0021] Figure 4 It is the butterfly valve body three-dimensional structure schematic diagram of the utility model.

[0022] In the drawing: 1, butterfly valve body; 2, first flange; 3, second flange; 4, flow-through port; 5, valve stem; 6, butterfly plate; 7, control rod; 8, heat insulation layer; 9, sealing silica gel pad; 10, first movable bearing; 11, second movable bearing. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely 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, not 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 scope of protection of the utility model.

[0024] Please refer to Figure 1 - Figure 4The utility model provides a technical scheme: a novel butterfly valve of sealing structure, including butterfly valve main body 1, the rear of butterfly valve main body 1 is fixedly arranged with first butt flange 2, the front of butterfly valve main body 1 is fixedly arranged with second butt flange 3, the front and rear sides of butterfly valve main body 1 are fixedly arranged with flow pass 4, the inboard lower of butterfly valve main body 1 is movably arranged with valve stem 5, the outside of valve stem 5 is fixedly arranged with butterfly plate 6, the upper of butterfly valve main body 1 is movably arranged with control rod 7, the inside of butterfly valve main body 1 is fixedly arranged with heat insulating layer 8, the inboard of butterfly valve main body 1 is fixedly arranged with sealed silica gel pad 9, the upper inside of butterfly valve main body 1 is fixedly arranged with first movable bearing 10, the lower inside of butterfly valve main body 1 is fixedly arranged with second movable bearing 11, through the use of heat insulating layer 8, make it in use through heat insulating layer 8 to isolate the temperature propagation of outside and inside, to avoid sealed silica gel pad 9 because of cold and cause shrinkage, thereby leading to the poor sealing effect of device's problem, and the material of heat insulating layer 8 is heat insulating ceramic fibre, and it has good high temperature resistance, corrosion resistance and not easy ageing etc.

[0025] The size and shape of the first butt flange 2 and the second butt flange 3 are the same, the flow-through holes of the first butt flange 2 and the second butt flange 3 are the same size as the flow pass 4, the upper surface of the valve stem 5 is fixedly connected to the lower surface of the control rod 7, the material of the heat insulating layer 8 is heat insulating ceramic fibre, which has good high temperature resistance, corrosion resistance and not easy ageing etc., the size of the sealed silica gel pad 9 is slightly larger than the size of the butterfly plate 6, the outer movable shaft end of the first movable bearing 10 is fixedly connected to the butterfly valve main body 1, the inner movable shaft end of the first movable bearing 10 is fixedly connected to the valve stem 5, the outer movable shaft end of the second movable bearing 11 is fixedly connected to the butterfly valve main body 1, the inner movable shaft end of the second movable bearing 11 is fixedly connected to the valve stem 5, the first butt flange 2 and the second butt flange 3 are connected to the installation place of the pipeline, which is more convenient during installation, and the valve stem 5 is controlled by the control rod 7, thereby driving the butterfly plate 6 to rotate, so as to control the communication of the butterfly valve main body 1, the sealed silica gel pad 9 is provided, which can better ensure the sealing effect of the butterfly plate 6 and the butterfly valve main body 1 during use, and the valve stem 5 is limited and assisted to rotate by the first movable bearing 10 and the second movable bearing 11, which has better use effect.

[0026] Working principle: the new sealing structure butterfly valve, through the use of heat insulation layer 8, makes it in use through heat insulation layer 8 to isolate the temperature propagation of the outside and the inside, to avoid the sealing silica gel pad 9 because of cold shrinkage, thereby causing the sealing effect of the device is poor, and the material of heat insulation layer 8 is heat insulation ceramic fiber, it has good high temperature resistance, corrosion resistance and not easy to age and other characteristics, through the first pair of flange 2 and the second pair of flange 3 to connect with the installation of pipeline, more convenient in installation, and through the control rod 7 to control the valve stem 5, thereby driving the butterfly plate 6 rotation, to control the communication of butterfly valve body 1, through the sealing silica gel pad 9, so that it can better guarantee the sealing effect of butterfly plate 6 and butterfly valve body 1 inside in use, so that it has better sealing effect in use, and through the first movable bearing 10 and the second movable bearing 11 to limit the valve stem 5, and assist it to rotate, the use effect is better.

[0027] Finally, it should be explained that the above content is only used to illustrate the technical scheme of the present application, and is not limited to the scope of the present application. Simple modification or equivalent replacement of the technical scheme of the present application by those skilled in the art does not deviate from the essence and scope of the present application.

Claims

1. A butterfly valve of a new sealing structure comprising a butterfly valve body (1), characterized in that: The rear of the butterfly valve body (1) is fixedly provided with a first flange (2), the front of the butterfly valve body (1) is fixedly provided with a second flange (3), the front and rear sides of the butterfly valve body (1) are fixedly provided with flow ports (4), the inner side of the butterfly valve body (1) is movably provided with a valve rod (5), the outer side of the valve rod (5) is fixedly provided with a butterfly plate (6), the upper side of the butterfly valve body (1) is movably provided with a control rod (7), the inside of the butterfly valve body (1) is fixedly provided with a heat insulation layer (8), the inner side of the butterfly valve body (1) is fixedly provided with a sealing silica gel pad (9), the inside of the butterfly valve body (1) is fixedly provided with a first movable bearing (10), and the inside of the butterfly valve body (1) is fixedly provided with a second movable bearing (11).

2. The butterfly valve of claim 1, wherein: The first flange (2) and the second flange (3) are the same in size and shape, and the flow holes of the first flange (2) and the second flange (3) are the same in size as the flow ports (4).

3. The butterfly valve of claim 2, wherein: The upper surface of the valve rod (5) is fixedly connected with the lower surface of the control rod (7).

4. The butterfly valve of claim 3, wherein: The material of the heat insulation layer (8) is heat insulation ceramic fiber.

5. The butterfly valve of claim 4, wherein: The sealing silica gel pad (9) is slightly larger than the butterfly plate (6) in size.

6. The butterfly valve of claim 5, wherein: The outer movable shaft end of the first movable bearing (10) is fixedly connected with the butterfly valve body (1), and the inner movable shaft end of the first movable bearing (10) is fixedly connected with the valve rod (5).

7. The butterfly valve of claim 6, wherein: The outer movable shaft end of the second movable bearing (11) is fixedly connected with the butterfly valve body (1), and the inner movable shaft end of the second movable bearing (11) is fixedly connected with the valve rod (5).

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