High-temperature-resistant connecting rod ventilation butterfly valve

Abstract

The utility model discloses a high-temperature-resistant connecting rod ventilation butterfly valve, which relates to the technical field of ventilation butterfly valves and comprises a valve body, a valve shaft is rotatably connected onto the valve body, a valve plate is arranged in the valve body, a fixing plate is fixedly connected into the valve body, a connecting rod is hinged onto the fixing plate, a connecting plate is hinged to one end, far away from the fixing plate, of the connecting rod, and the connecting plate is fixedly connected onto the valve body. The end, away from the connecting rod, of the connecting plate is fixedly connected with the valve plate, a force arm is fixedly connected to the outer side of the valve shaft, the movable end of the force arm is hinged to the connecting plate, and the force arm is driven by the valve shaft to rotate and used for controlling the valve plate to be opened and closed. The high-temperature-resistant connecting rod ventilation butterfly valve can prevent a sealing surface from being damaged and is good in sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to ventilation butterfly valve technical field, concretely is a kind of high-temperature connecting rod ventilation butterfly valve. BACKGROUND

[0002] Now high-temperature ventilation butterfly valve is widely used in building materials, chemical industry, power station etc. high-temperature gas pipeline, high-temperature medium is easy to make bearing jam;It can also cause valve shaft, valve plate thermal expansion and lead to valve shaft axial displacement, valve plate radial displacement bias, cause butterfly plate cannot be closed or make sealing surface abrasion damage and other serious problems;In addition, the conventional ventilation butterfly valve structure is for midline type, valve shaft passes through the center of valve plate, destroys the integrity of valve plate and valve body sealing surface, causes the inevitable gap between valve plate and valve body, and the sealing performance of valve cannot be guaranteed at all.

[0003] In Chinese utility model patent application No. CN202123429679.0, a self-cleaning four-bar linkage butterfly valve is disclosed. The butterfly valve is driven by the valve shaft through the linkage group to open and close the valve plate. Although this driving method can solve the above problems to some extent, the valve plate is still directly opened and closed by rotation, which can cause friction damage to the sealing surface during the opening and closing process, affecting the sealing effect.

[0004] Therefore, it is necessary to provide a high-temperature connecting rod ventilation butterfly valve to solve the above problems. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] The utility model aims to provide a high-temperature connecting rod ventilation butterfly valve to solve the problems raised in the background art.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical solution: a high-temperature connecting rod ventilation butterfly valve, comprising a valve body, a valve shaft rotatably connected to the valve body, a valve plate provided in the valve body, a fixed plate fixedly connected in the valve body, a connecting rod hingedly connected to the fixed plate, a connecting plate hingedly connected to the end of the connecting rod away from the fixed plate, the end of the connecting plate away from the connecting rod fixedly connected with the valve plate, a force arm fixedly connected to the outside of the valve shaft, the movable end of the force arm hingedly connected with the connecting plate, the force arm driven to rotate by the valve shaft for controlling the opening and closing of the valve plate.

[0009] Preferably, the fixed plate, connecting rod, connecting plate and force arm are all provided with multiple force arms, and the multiple force arms are uniformly distributed along the axial direction of the valve shaft.

[0010] Preferably, the valve plate has two valve plates, and the two valve plates are symmetrically distributed along the axial center of the valve body.

[0011] Preferably, the outer side of the valve body is fixedly connected with a bearing seat, and both ends of the valve shaft are rotatably connected with the bearing seat through bearings.

[0012] Preferably, the inner side of the valve body is provided with a high-strength low-conductivity pouring layer.

[0013] Preferably, the inner side of the valve body is fixedly connected with a sealing ring matched with the valve plate.

[0014] Preferably, the valve plate and the sealing ring are both provided with expansion gaps between the inner wall of the valve body.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a high temperature resistance connecting rod ventilation butterfly valve has the following beneficial effects:

[0017] 1、 this high temperature resistance connecting rod ventilation butterfly valve, through the force arm and connecting rod cooperation, make the valve plate rise and then overturn, to avoid the valve plate overturning process and the valve body sealing surface mutual friction, cause the sealing surface damage, ensure the sealing effect.

[0018] 2、 this high temperature resistance connecting rod ventilation butterfly valve, through setting up the sealing ring, and reduce the size of valve plate, reserve expansion gap between valve plate, sealing ring and the inner wall of valve body, to avoid the valve plate, sealing ring and the high temperature thermal expansion caused by the jamming phenomenon. DETAILED DESCRIPTION

[0019] Fig. 1 It is the three-dimensional schematic view of the utility model structure;

[0020] Fig. 2 It is the local section schematic view of the utility model structure;

[0021] Fig. 3 It is the section schematic view of the bearing seat of the utility model.

[0022] In the drawing: 1, valve plate;2, fixed plate;3, valve body;4, valve shaft;5, high-strength low-conductivity pouring layer;6, connecting rod;7, connecting plate;8, force arm;9, sealing ring;10, felt ring oil seal;11, bearing;12, bearing seat. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0024] Please refer to Figs. 1-3As shown, a high-temperature-resistant connecting rod ventilated butterfly valve comprises a valve body 3, a valve shaft 4 rotatably connected to the valve body 3, a valve plate 1 arranged in the valve body 3, a fixed plate 2 fixedly connected to the valve body 3, a connecting rod 6 hingedly connected to the fixed plate 2, a connecting plate 7 hingedly connected to one end of the connecting rod 6 away from the fixed plate 2, the valve plate 1 fixedly connected to one end of the connecting plate 7 away from the connecting rod 6, a force arm 8 fixedly connected to the outer side of the valve shaft 4, and the movable end of the force arm 8 hingedly connected to the connecting plate 7, the force arm 8 driven to rotate by the valve shaft 4 for controlling the opening and closing of the valve plate 1.

[0025] When the valve plate 1 is opened, the force arm 8 is driven to rotate counterclockwise by the valve shaft 4, and under the cooperation of the connecting rod 6, the connecting plate 7 first moves upward to make the valve plate 1 away from the sealing surface, and with the continuous rotation of the force arm 8, the connecting plate 7 drives the valve plate 1 to gradually overturn, so that the valve plate 1 is opened. Through the cooperation of the force arm 8 and the connecting rod 6, the valve plate 1 is lifted and then overturned to avoid damage to the sealing part of the valve plate 1 and the valve body 3.

[0026] In order to make the opening and closing of the valve plate 1 more stable, the fixed plate 2, the connecting rod 6, the connecting plate 7 and the force arm 8 are all provided with multiple force arms 8 which are uniformly distributed along the axial direction of the valve shaft 4. Through the above arrangement, the force balance of the valve plate 1 during lifting is achieved, and the problem of inclination during opening and closing is avoided.

[0027] In some embodiments, the valve plate 1 has two valve plates 1 which are symmetrically distributed along the axis of the valve body 3. By providing two valve plates 1, the size of the valve plate 1 is reduced, and the opening is more convenient.

[0028] In order to make the bearing 11 not affected by the high-temperature medium inside, the outer side of the valve body 3 is fixedly connected with a bearing seat 12, and the two ends of the valve shaft 4 are rotatably connected with the bearing seat 12 through the bearing 11. Preferably, the bearing 11 is a self-aligning bearing, and the two sides of the bearing 11 are provided with felt ring oil seals 10 for sealing protection of the bearing 11 to prevent dust from entering.

[0029] In order to improve the heat insulation effect of the valve body 3, the inner side of the valve body 3 is provided with a high-strength and low-conductivity pouring layer 5. The structural parts in the valve body 3 are made of high-temperature-resistant materials to ensure the high-temperature-resistant performance of the valve.

[0030] In some embodiments, in order to ensure the sealing effect, the inner side of the valve body 3 is fixedly connected with a sealing ring 9 matched with the valve plate 1. When the valve plate 1 is closed, the valve plate 1 and the sealing ring 9 are in close contact and sealed.

[0031] The valve plate 1 and the sealing ring 9 are both provided with expansion gaps between the inner wall of the valve body 3, so that the valve plate 1 and the sealing ring 9 can freely expand at high temperature without being stuck. Specifically, the sealing ring 9 is fixedly connected to the valve body 3 by bolts, and the sealing ring 9 is provided with a U-shaped groove for penetrating the bolts.

[0032] In addition, in order to avoid the high temperature from affecting the sealing effect, the valve plate 1 and the sealing ring 9 adopt the hard sealing.

[0033] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature-resistant connecting rod ventilated butterfly valve, comprising a valve body (3), a valve shaft (4) is rotatably connected to the valve body (3), and a valve plate (1) is arranged in the valve body (3), characterized in that: The valve body (3) is fixedly connected with a fixed plate (2), the fixed plate (2) is hingedly connected with a connecting rod (6), one end of the connecting rod (6) away from the fixed plate (2) is hingedly connected with a connecting plate (7), one end of the connecting plate (7) away from the connecting rod (6) is fixedly connected with a valve plate (1), the outer side of the valve shaft (4) is fixedly connected with a force arm (8), the movable end of the force arm (8) is hingedly connected with the connecting plate (7), the force arm (8) is driven to rotate by the valve shaft (4) for controlling the opening and closing of the valve plate (1).

2. A high temperature resistant link vented butterfly valve according to claim 1, characterized in that: The fixed plate (2), the connecting rod (6), the connecting plate (7) and the force arm (8) are all provided in plurality, and the plurality of force arms (8) are uniformly distributed along the axial direction of the valve shaft (4).

3. A high temperature resistant link vented butterfly valve as claimed in claim 1, wherein: The valve plate (1) is provided in two, and the two valve plates (1) are symmetrically distributed along the axial center of the valve body (3).

4. A high temperature resistant link vented butterfly valve as claimed in claim 1, wherein: The outer side of the valve body (3) is fixedly connected with a bearing seat (12), and both ends of the valve shaft (4) are rotatably connected with the bearing seat (12) through bearings (11).

5. A high temperature resistant link vented butterfly valve as claimed in claim 1, wherein: The inner side of the valve body (3) is provided with a high-strength low-conductivity pouring layer (5).

6. A high temperature resistant link vented butterfly valve as claimed in claim 1, wherein: The inner side of the valve body (3) is fixedly connected with a sealing ring (9) matched with the valve plate (1).

7. A high temperature resistant link vented butterfly valve according to claim 6, wherein: Expansion gaps are provided between the valve plate (1), the sealing ring (9) and the inner wall of the valve body (3).

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