Flat valve with high sealing performance

Abstract

The utility model discloses a flat valve with high sealing performance, which relates to the technical field of valve manufacture and comprises a valve body, a clamping groove is arranged in the valve body, a valve seat matched with the clamping groove in size and position is slidably connected in the clamping groove, a first air bag is arranged at the bottom of the clamping groove, and second air bags are arranged on two sides of the clamping groove. The first air bag communicates with the second air bag, the first air bag is filled with liquid, the top of the valve seat is fixedly connected with a fixing block, and a driving structure is arranged on the fixing block. Through the arrangement of the first air bag and the second air bag, when the motor drives the valve seat to move downwards, the bottom of the valve seat can extrude the first air bag, so that liquid in the first air bag moves into the second air bag, the second air bag is expanded, and a gap at the joint of the valve body and the valve seat is favorably blocked through expansion of the second air bag; and the sealing performance between the valve body and the valve seat is conveniently improved, so that the flat valve can be better used.

Description

Technical Field

[0001] The utility model relates to the technical field of valve manufacturing, in particular to a high-sealing flat valve. Background Art

[0002] The flat plate valve, also known as the retaining spring valve or special-shaped valve, is a valve that uses a flat plate to control the flow of fluid. It is composed of a valve body, a valve plate, a retaining spring and other components. The valve plate is fixed by a retaining spring and a valve stem. The up and down adjustment of the valve stem can control the opening and closing of the valve plate, thereby controlling the flow of the fluid. The flat plate valve has the advantages of simple structure, easy manufacturing and installation, and is widely used in industries such as petroleum, natural gas, chemical industry and environmental protection. In these industries, the flat plate valve is used to control the on-off and flow of various media to meet different working conditions.

[0003] The working principle of the flat plate valve can be simply described as: when the valve stem rises, the flat plate is lifted off the valve seat, forming an open channel, and the fluid can flow freely through the channel of the valve body; when the valve stem descends, the flat plate is pressed against the valve seat, completely closing the channel, and the fluid cannot pass through the channel of the valve body; when the valve stem partially rises or descends, the flat plate only blocks part of the channel, allowing the flow of part of the fluid. This is the regulating function of the flat plate valve.

[0004] Currently, when using a flat plate valve, it is necessary to first connect pipes at both ends of the flat plate valve, and then allow the liquid to flow through the pipes, and the position of the valve seat needs to be adjusted according to the actual situation of the liquid flow in the pipe, so as to better transport the liquid.

[0005] When the flat valve is used, a rubber ring is provided at the connection between the existing valve seat and the valve body to increase the sealing performance. However, the rubber ring will be worn during long-term use. Therefore, when the valve seat is closed, the sealing performance between the valve seat and the valve body will be affected, thereby affecting the use of the flat valve. Utility Model Content

[0006] Based on this, the purpose of the utility model is to provide a high-sealing flat valve to solve the technical problem that a rubber ring is provided at the connection between the existing valve seat and the valve body to increase the sealing, but the rubber ring will be worn during long-term use, so when the valve seat is closed, it will affect the sealing between the valve seat and the valve body, thereby affecting the use of the flat valve.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-sealing flat valve, comprising a valve body, a slot is provided in the valve body, and a valve seat matching the size and position of the slot is slidably connected in the slot, a first airbag is provided at the bottom of the slot, and second airbags are provided on both sides of the slot, the first airbag and the second airbag are connected, and the first airbag is filled with liquid, the top of the valve seat is fixedly connected to a fixed block, and a driving structure is provided on the fixed block.

[0008] By adopting the above technical solution, when the flat valve is used to prevent the flow of liquid, the valve seat can be driven downward by the driving structure, so that the bottom of the valve seat can squeeze the first airbag, so that the liquid in the first airbag moves into the second airbag, causing the second airbag to expand. This is beneficial for plugging the gap at the connection between the valve body and the valve seat through the expansion of the second airbag, and is convenient for increasing the sealing between the valve body and the valve seat, so that the flat valve can be better used.

[0009] The utility model is further configured such that the outer surface of the valve body is fixedly connected to a first connection shell, and the top of the first connection shell is connected to a second connection shell by bolts, and the driving structure is arranged inside the first connection shell and the second connection shell.

[0010] By adopting the above technical solution, it is advantageous to connect the first connecting shell and the second connecting shell by bolts, which makes it easy to install and disassemble the first connecting shell and the second connecting shell. At the same time, the driving structure is arranged inside the first connecting shell and the second connecting shell, so that the driving structure can be protected, and when the first connecting shell and the second connecting shell are disassembled, it is convenient to inspect and repair the driving structure.

[0011] The utility model is further configured such that the driving structure includes one end of a screw rod rotatably connected to the outer surface of the valve body, and the other end of the screw rod movably passes through both sides of the fixed block and the top of the second connecting shell and extends to the outside to be connected to the output end of the motor, the motor is placed inside the silencer box, and the silencer box is fixedly connected to the top of the second connecting shell.

[0012] By adopting the above technical solution, the forward and reverse rotation of the motor synchronously drives the screw rod to rotate, so that the fixed valve seat is driven to move up and down by the rotation of the screw rod. This is beneficial for better squeezing the first airbag and the second airbag through the driving force of the motor when the valve seat moves downward, thereby facilitating increasing the sealing between the valve body and the valve seat.

[0013] The utility model is further configured such that matching limit grooves are provided on both sides of the first connecting shell and the second connecting shell, and limit blocks matching the limit grooves are slidably connected in the limit grooves, the limit blocks are fixedly connected on both sides of the fixed block, and the limit blocks are configured as a "T"-shaped structure.

[0014] By adopting the above technical solution and setting the limiting block and the limiting groove, the stability of the movement of the fixed block in the first connecting shell and the second connecting shell can be increased, so that the valve seat can be better driven to move in the valve body through the fixed block.

[0015] The utility model is further configured that both sides of the valve body are connected with pipelines through flanges, and the pipelines are configured as a stepped structure.

[0016] By adopting the above technical solution, both ends of the valve body are connected to pipelines through flanges, so that the valve body can be connected to external pipelines through pipelines, so that the flat plate valve can be better used. At the same time, the flat plate valve is set to a stepped structure, which is conducive to connecting pipelines of different sizes.

[0017] The utility model is further configured that the valve body and the screw rod are rotatably connected via a bearing.

[0018] By adopting the above technical solution, the valve body and the screw rod are rotationally connected through the bearing, which is conducive to the rotation of the screw rod on the outer surface of the valve body, thereby synchronously driving the valve seat to move, facilitating better use of the flat valve.

[0019] In summary, the utility model mainly has the following beneficial effects:

[0020] The utility model is provided with a first airbag and a second airbag. When a motor drives the valve seat to move downward, the bottom of the valve seat can squeeze the first airbag, so that the liquid in the first airbag moves into the second airbag, causing the second airbag to expand. This is beneficial for plugging the gap at the connection between the valve body and the valve seat through the expansion of the second airbag, which is convenient for increasing the sealing between the valve body and the valve seat, so that the flat valve can be better used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a three-dimensional structural cross-sectional view of the utility model;

[0023] Figure 3 This is a detailed diagram of the interior of the three-dimensional structure of the utility model.

[0024] In the figure: 1. valve body; 2. slot; 3. valve seat; 4. first air bag; 5. second air bag; 6. fixing block; 7. screw rod; 8. motor; 9. silencer; 10. limit slot; 11. limit block; 12. first connecting shell; 13. second connecting shell; 14. bolt; 15. flange; 16. pipeline. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0026] The following describes an embodiment of the utility model based on its overall structure.

[0027] A high sealing flat plate valve, such as Figure 1-3 As shown, it includes a valve body 1, a slot 2 is provided in the valve body 1, and a valve seat 3 that matches the size and position of the slot 2 is slidably connected in the slot 2, which is conducive to the movement of the valve seat 3 in the slot 2, a first air bag 4 is provided at the bottom of the slot 2, and second air bags 5 are provided on both sides of the slot 2, the first air bag 4 and the second air bag 5 are connected, and the first air bag 4 is filled with liquid, so the liquid in the first air bag 4 can enter the interior of the second air bag 5, and a fixed block 6 is fixedly connected to the top of the valve seat 3, and a driving structure is provided on the fixed block 6, which can synchronously drive the fixed block 6 and the valve seat 3 to move through the driving structure.

[0028] When the flat valve is in use, the first airbag 4 and the second airbag 5 can be arranged so that when the driving structure drives the valve seat 3 to move downward, the bottom of the valve seat 3 can squeeze the first airbag 4, so that the liquid in the first airbag 4 moves into the second airbag 5, causing the second airbag 5 to expand. This is beneficial for plugging the gap at the connection between the valve body 1 and the valve seat 3 through the expansion of the second airbag 5, and is convenient for increasing the sealing between the valve body 1 and the valve seat 3, so that the flat valve can be better used.

[0029] At the same time, a first connecting shell 12 is fixedly connected to the outer surface of the valve body 1, and the top of the first connecting shell 12 is connected to the second connecting shell 13 by bolts 14, which is conducive to quickly installing and disassembling the first connecting shell 12 and the second connecting shell 13 by bolts 14. The driving structure is arranged inside the first connecting shell 12 and the second connecting shell 13, which is conducive to protecting the driving structure by the first connecting shell 12 and the second connecting shell 13. A polygonal column is arranged at the output end of the motor 8, and the polygonal column is inserted into the screw rod 7, so that the screw rod 7 and the motor 8 are detachable. Therefore, when the first connecting shell 12 and the second connecting shell 13 are disassembled, the driving structure can be inspected and repaired.

[0030] The driving structure includes one end of a screw rod 7 rotatably connected to the outer surface of the valve body 1, and the other end of the screw rod 7 movably passes through both sides of the fixed block 6 and the top of the second connecting shell 13 and extends to the output end of the outside connected to the motor 8. The valve body 1 and the screw rod 7 are rotatably connected through a bearing, which is conducive to driving the screw rod 7 to rotate on the outer surface of the valve body 1 through the motor 8, so that the fixed block 6 can move up and down on the outer surface of the screw rod 7, and the valve seat 3 is synchronously driven to move, so the flat valve can be better used, the motor 8 is placed inside the muffler box 9, and the muffler box 9 is fixedly connected to the top of the second connecting shell 13, the muffler box 9 can reduce the noise generated during the operation of the motor 8, and the position of the motor 8 can be fixed by the muffler box 9.

[0031] Then, matching limit grooves 10 are provided on both sides of the first connecting shell 12 and the second connecting shell 13, and a limit block 11 matching the limit groove 10 is slidably connected in the limit groove 10, and the limit block 11 is fixedly connected to both sides of the fixed block 6. The stability of the fixed block 6 in the first connecting shell 12 and the second connecting shell 13 is increased by the limit groove 10 and the limit block 11, and the limit block 11 is set to a "T" shape structure, which can increase the stability of the limit block 11 sliding in the limit groove 10.

[0032] Furthermore, pipelines 16 are connected to both sides of the valve body 1 through flanges 15, so that the valve body 1 is connected to external pipelines through the pipelines 16, and the pipelines 16 are set as a stepped structure, which is conducive to connecting external pipelines of different sizes through the stepped structure of the pipelines 16.

[0033] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A high-sealing flat valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a slot (2), and a valve seat (3) having a size and position matching that of the slot (2) is slidably connected to the slot (2); a first airbag (4) is provided at the bottom of the slot (2), and second airbags (5) are provided on both sides of the slot (2); the first airbag (4) and the second airbag (5) are connected, and the first airbag (4) is filled with liquid; a fixed block (6) is fixedly connected to the top of the valve seat (3), and a driving structure is provided on the fixed block (6).

2. A high sealing flat valve according to claim 1, characterized in that: The outer surface of the valve body (1) is fixedly connected to a first connecting shell (12), and the top of the first connecting shell (12) is connected to a second connecting shell (13) via bolts (14), and the driving structure is arranged inside the first connecting shell (12) and the second connecting shell (13).

3. A high sealing flat valve according to claim 2, characterized in that: The driving structure comprises one end of a screw rod (7) rotatably connected to the outer surface of the valve body (1), and the other end of the screw rod (7) movably passes through both sides of the fixed block (6) and the top of the second connecting shell (13) and extends to the outside to be connected to the output end of the motor (8), wherein the motor (8) is placed inside the muffler box (9), and the muffler box (9) is fixedly connected to the top of the second connecting shell (13).

4. A high sealing flat valve according to claim 2, characterized in that: Both sides of the first connecting shell (12) and the second connecting shell (13) are provided with matching limiting grooves (10), and limiting blocks (11) matching the limiting grooves (10) are slidably connected in the limiting grooves (10), and the limiting blocks (11) are fixedly connected to both sides of the fixed block (6), and the limiting blocks (11) are arranged in a "T"-shaped structure.

5. The high-sealing flat valve according to claim 1, characterized in that: Both sides of the valve body (1) are connected to pipelines (16) via flanges (15), and the pipelines (16) are arranged in a stepped structure.

6. A high sealing flat valve according to claim 1, characterized in that: The valve body (1) and the screw rod (7) are rotatably connected via a bearing.

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