Double-plate safety float valve

Abstract

The utility model relates to the technical field of safety valves, and discloses a double-plate safety float valve which comprises a first air inlet sleeve, a valve body is fixedly arranged at the top of the first air inlet sleeve, and a second exhaust sleeve is fixedly arranged at the top of the valve body. According to the double-plate safety float valve, when a gas ascending channel needs to be closed, a first rotating handle and a second rotating handle can be rotated, so that a first rotating shaft and a second rotating shaft rotate, and the first rotating shaft and the second rotating shaft rotate to drive a first meshing valve plate to rotate rightwards along the inner side of a valve body and to rotate leftwards along the inner side of the valve body; a plurality of tooth grooves capable of being meshed with each other are formed in the outer side of the first meshing valve plate and the outer side of the second meshing valve plate, when the first meshing valve plate and the second meshing valve plate are completely meshed, the first meshing valve plate and the second meshing valve plate are meshed with each other, and then a gas ascending channel is cut off. And gas is difficult to pass through the meshing connection part of the middle parts of the first meshing valve plate and the second meshing valve plate, so that the gas tightness of the device is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety valve, concretely to a double-plate safety float valve. BACKGROUND

[0002] Safety valve is the closing part under the action of external force and is in the normally closed state, when the medium pressure in the equipment or pipeline rises above the specified value, the safety valve is a special valve that prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium to the system outside, the safety valve belongs to the automatic valve class, and is mainly used on boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, and plays an important protective role for personal safety and equipment operation. Note that the safety valve must be subjected to pressure test before use.

[0003] The existing patent CN207296965U discloses an oil and gas well casing safety valve, and the utility model discloses a upper joint, outer connecting barrel and lower joint successively, and is provided with valve seat and valve cavity successively between the outer connecting barrel and the lower joint, and the outer connecting barrel is provided with a sliding sleeve, an inner connecting barrel and an opening sleeve which can slide axially successively, the oil and gas well casing safety valve provided by the utility model is opened and closed by the opening and closing tool connected at the end of the oil pipe, and liquid control devices are not needed, so that production cost and maintenance cost are saved, and the piston and the liquid control pipeline which must be provided for the liquid control safety valve are not needed, potential leakage points are avoided, and the reliability of the tool is improved, when the working string is pulled out of the well, the opening and closing tool at the bottom end of the string passes through the safety valve upwards while closing the safety valve, instant response is realized, and operation safety is ensured.

[0004] However, the existing patent CN207296965U improves the reliability of the tool, when the working string is pulled out of the well, the opening and closing tool at the bottom end of the string passes through the safety valve upwards while closing the safety valve, instant response is realized, and operation safety is ensured, but when the safety valve in the oil and gas well is in the closed state, the gas at the bottom of the inner side of the oil and gas well is mixed with particles, which may flow upwards through the gap between the valve plate and the valve body, and then may affect the air tightness of the valve body. UTILITY MODEL CONTENTS

[0005] (I) technical problem solved

[0006] The utility model aims at providing a double-plate safety float valve, to solve the problem that when the safety valve in the oil and gas well is in the closed state, the gas at the bottom of the inner side of the oil and gas well is mixed with particles, which may flow upwards through the gap between the valve plate and the valve body, and then may affect the air tightness of the valve body.

[0007] (II) technical scheme

[0008] To achieve the above objectives, the present invention provides the following technical solution: a double-plate safety float valve, comprising a first air inlet sleeve, a valve body fixedly disposed on the top of the first air inlet sleeve, and a second exhaust sleeve fixedly disposed on the top of the valve body.

[0009] Preferably, a first engaging valve plate is provided on the inner side of the valve body. The bottom of the first engaging valve plate is hinged to the valve body. When it is necessary to close the gas upward passage, the first and second handles can be rotated respectively to rotate the first and second rotating shafts.

[0010] Preferably, a rotating shaft is fixedly provided on the top of the first engagement valve plate, and the rotating shaft passes through the second exhaust sleeve and is fixedly connected to the handle.

[0011] Preferably, a second engagement valve plate is provided on the inner side of the valve body. The bottom of the second engagement valve plate is hinged to the valve body. Rotation of the first and second rotating shafts causes the first engagement valve plate to rotate to the right along the inner side of the valve body, and then to rotate to the left along the inner side of the valve body, until the first engagement valve plate and the second engagement valve plate are fully engaged, thereby cutting off the upward passage of gas.

[0012] Preferably, the second engagement valve plate engages with the first engagement valve plate, a rotating shaft is fixedly provided on the top of the second engagement valve plate, and a plurality of meshing tooth grooves are provided on the outer sides of the first engagement valve plate and the second engagement valve plate.

[0013] Preferably, the second rotating shaft passes through the second exhaust sleeve and is fixedly connected to the second rotating handle. The second rotating shaft is located above the second exhaust sleeve. When the first engagement valve plate and the second engagement valve plate are fully engaged, the gas is less likely to pass through the engagement connection in the middle of the first engagement valve plate and the second engagement valve plate, which effectively improves the airtightness of the device.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. When it is necessary to close the gas upward passage of this double-plate safety float valve, the first and second handles can be turned respectively to rotate the first and second rotating shafts. The rotation of the first and second rotating shafts drives the first engagement valve plate to rotate to the right along the inside of the valve body, and then drives it to rotate to the left along the inside of the valve body until the first engagement valve plate and the second engagement valve plate are fully engaged, thereby cutting off the gas upward passage.

[0016] 2. The double-plate safety float valve has several interlocking grooves on the outer sides of the first and second meshing valve plates. When the first and second meshing valve plates are fully engaged, gas is less likely to pass through the meshing connection in the middle of the first and second meshing valve plates, thus effectively improving the airtightness of the device. Attached Figure Description

[0017] Figure 1 It is the sectional structure schematic view of the utility model;

[0018] Figure 2 It is the sectional structure schematic view of the utility model;

[0019] Figure 3 It is the sectional structure schematic view of the utility model;

[0020] Figure 4 It is the sectional structure schematic view of the utility model.

[0021] In the figure: 1, air inlet sleeve; 2, valve body; 3, second exhaust sleeve; 4, first meshing valve plate; 5, rotating shaft one; 6, rotating hand one; 7, second meshing valve plate; 8, rotating shaft two; 9, rotating hand two. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described 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, rather than 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 protection scope of the utility model.

[0023] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a double-plate safety float valve, including first air inlet sleeve 1, the top of first air inlet sleeve 1 is fixedly provided with valve body 2, the top of valve body 2 is fixedly provided with second exhaust sleeve 3.

[0024] The inner side of the valve body 2 is provided with a first engaging valve plate 4, the bottom of the first engaging valve plate 4 is hinged to the valve body 2, the top of the first engaging valve plate 4 is fixedly provided with a rotating shaft 5, the rotating shaft 5 penetrates the second exhaust sleeve 3 and is fixedly connected with a rotating handle 6, the inner side of the valve body 2 is provided with a second engaging valve plate 7, the bottom of the second engaging valve plate 7 is hinged to the valve body 2, the second engaging valve plate 7 engages with the first engaging valve plate 4, the top of the second engaging valve plate 7 is fixedly provided with a rotating shaft 8, the rotating shaft 8 penetrates the second exhaust sleeve 3 and is fixedly connected with a rotating handle 9, the rotating shaft 8 is arranged above the second exhaust sleeve 3, when it is needed to close the channel for the upward movement of the gas when the double-plate safety float valve is used, the rotating handle 6 and the rotating handle 9 can be rotated respectively, so that the rotating shaft 5 and the rotating shaft 8 are rotated, the rotating shaft 5 and the rotating shaft 8 are rotated, the first engaging valve plate 4 is driven to rotate rightwards along the inner side of the valve body 2, and the second engaging valve plate 7 is driven to rotate leftwards along the inner side of the valve body 2, until the first engaging valve plate 4 completely engages with the second engaging valve plate 7, then the channel for the upward movement of the gas is cut off, because the outer sides of the first engaging valve plate 4 and the second engaging valve plate 7 are provided with a plurality of tooth grooves which can engage with each other, when the first engaging valve plate 4 completely engages with the second engaging valve plate 7, it is more difficult for the gas to pass through the engagement connection portion in the middle of the first engaging valve plate 4 and the second engaging valve plate 7.

[0025] Working principle: when it is needed to close the channel for the upward movement of the gas when the double-plate safety float valve is used, the rotating handle 6 and the rotating handle 9 can be rotated respectively, so that the rotating shaft 5 and the rotating shaft 8 are rotated, the rotating shaft 5 and the rotating shaft 8 are rotated, the first engaging valve plate 4 is driven to rotate rightwards along the inner side of the valve body 2, and the second engaging valve plate 7 is driven to rotate leftwards along the inner side of the valve body 2, until the first engaging valve plate 4 completely engages with the second engaging valve plate 7, then the channel for the upward movement of the gas is cut off, because the outer sides of the first engaging valve plate 4 and the second engaging valve plate 7 are provided with a plurality of tooth grooves which can engage with each other, when the first engaging valve plate 4 completely engages with the second engaging valve plate 7, it is more difficult for the gas to pass through the engagement connection portion in the middle of the first engaging valve plate 4 and the second engaging valve plate 7.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical scheme of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical scheme of the present application made by those skilled in the art do not deviate from the essence and scope of the technical scheme of the present application.

Claims

1. A double-plate safety float valve, comprising a first air inlet sleeve (1), characterized in that: A valve body (2) is fixedly installed on the top of the first intake sleeve (1), and a second exhaust sleeve (3) is fixedly installed on the top of the valve body (2).

2. The double-plate safety float valve according to claim 1, characterized in that: The valve body (2) is provided with a first engagement valve plate (4) on its inner side, and the bottom of the first engagement valve plate (4) is hinged to the valve body (2).

3. A double-plate safety float valve according to claim 2, characterized in that: A rotating shaft (5) is fixedly installed on the top of the first engagement valve plate (4), and the rotating shaft (5) passes through the second exhaust sleeve (3) and is fixedly connected to the handle (6).

4. A double-plate safety float valve according to claim 3, characterized in that: The valve body (2) is provided with a second engagement valve plate (7) on its inner side, and the bottom of the second engagement valve plate (7) is hinged to the valve body (2).

5. A double-plate safety float valve according to claim 4, characterized in that: The second engagement valve plate (7) engages with the first engagement valve plate (4), and a rotating shaft (8) is fixedly provided on the top of the second engagement valve plate (7).

6. A double-plate safety float valve according to claim 5, characterized in that: The second rotating shaft (8) passes through the second exhaust sleeve (3) and is fixedly connected to the second rotating handle (9). The second rotating shaft (8) is located above the second exhaust sleeve (3).

Images