Single-action poppet valve

Abstract

The single-action lifting valve comprises a valve body and a valve plate assembly, the valve body is of a cavity structure and is provided with an air inlet port and an air outlet port, and an air cylinder assembly is fixedly arranged on the upper portion of the valve body. The valve plate assembly comprises a valve plate and a valve rod, the valve plate is located in the cavity of the valve body and located over the air inlet port, the valve rod is fixedly arranged on the valve plate, and the upper end of the valve rod penetrates through the valve body upwards. The air cylinder assembly comprises an air cylinder barrel, an air cylinder piston, a spring and an air cylinder piston rod, the air cylinder piston is movably arranged in the air cylinder barrel, the air cylinder piston rod is further arranged at the bottom of the air cylinder piston, and the end of the air cylinder piston rod penetrates through a bottom end cover of the air cylinder barrel and is fixedly connected with the valve rod. The spring is located in the air cylinder barrel and connected between the bottom end cover of the air cylinder barrel and the air cylinder piston. The utility model aims to provide a single-action lift valve, which is expected to solve the technical problem that the lift valve cannot be reset and opened under the conditions of power failure and gas failure.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a single acting poppet valve. BACKGROUND

[0002] RTO is also called heat accumulating type thermal incinerator, and is a kind of high-efficiency organic waste gas treatment equipment, and is widely used in VOCs waste gas treatment field at present.RTO or waste gas incineration device needs to be provided with emergency bypass valve because there is certain safety risk in waste gas collection, conveying, treatment and other links of RTO or waste gas incineration device.RTO or waste gas incineration device inlet cut-off valve is closed, and emergency bypass valve is opened when waste gas concentration is higher or RTO or waste gas incineration device has larger operation fault, and VOCs waste gas is discharged from emergency bypass valve.Emergency bypass valve usually adopts butterfly valve or poppet valve, and when VOCs waste gas air volume is larger, and the diameter of valve selection is larger, when butterfly valve is used as emergency bypass valve, there are the defects of slow opening, easy gas leakage, high price and large maintenance difficulty.Poppet valve is a kind of valve driven by straight stroke cylinder, and its working principle is to push valve core upward to realize medium on-off control by using pneumatic energy.The valve driven by cylinder has the advantages of rapid action, convenient control, high reliability and good sealing property.But poppet valve has the following defects:since the cylinder with larger diameter on the market is mostly double-acting cylinder, poppet valve mostly adopts double-acting cylinder, and in the case of power failure or gas failure, poppet valve will keep closed state by the gravity of valve plate and valve rod, cannot be reset safely before restoring gas supply, and there is the risk of fire and explosion due to VOCs concentration gathering in pipeline.

[0003] In order to overcome the above-mentioned defects, the utility model provides a single acting poppet valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a single acting poppet valve to solve the technical problem that poppet valve cannot be reset and opened in the case of power failure or gas failure.

[0005] In order to solve the above-mentioned technical problem, the utility model adopts the following technical scheme:

[0006] A single acting poppet valve, including valve body and valve plate assembly, the valve body is cavity structure and is provided with air inlet port and air outlet port, and cylinder assembly is fixedly arranged on the upper portion of valve body;

[0007] The valve plate assembly includes valve plate and valve rod, the valve plate is located in the cavity of valve body and directly above air inlet port, and the valve rod is fixedly arranged on the valve plate and the upper end of valve rod passes through the valve body upwards;

[0008] The cylinder assembly comprises a cylinder barrel, a cylinder piston, a spring and a cylinder piston rod, the cylinder piston is movably arranged in the cylinder barrel and is further provided with the cylinder piston rod at the bottom of the cylinder piston, the end of the cylinder piston rod penetrates through the bottom end cover of the cylinder barrel and is fixedly connected with the valve rod, and the spring is arranged in the cylinder barrel and is connected between the bottom end cover of the cylinder barrel and the cylinder piston.

[0009] Further, the cylinder seat is fixedly arranged on the valve body, and the cylinder barrel is arranged on the cylinder seat.

[0010] Further, the cylinder piston rod and the valve rod are connected through a shaft coupling, and the shaft seal is arranged at the top of the valve body, and the valve rod penetrates through the shaft seal.

[0011] Further, the diameter of the valve plate is larger than the inner diameter of the air inlet port, the sealing ring clamping groove is arranged at the edge of the bottom surface of the valve plate, and the sealing ring is fixedly arranged in the sealing ring clamping groove.

[0012] Further, the material of the sealing ring is graphite packing, and the sealing ring is installed in the sealing ring clamping groove through the fixing pin.

[0013] Further, the air inlet port is arranged in the vertical direction of the valve body, and the exhaust port is arranged in the horizontal direction of the valve body.

[0014] Further, when the valve plate blocks the air inlet port, the spring is in a compressed state.

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

[0016] Compared with the conventional butterfly valve as the emergency bypass valve of the RTO waste gas incineration system, the utility model has the advantages of rapid action, convenient control, high reliability and good sealing performance. Compared with the conventional poppet valve as the emergency bypass valve of the RTO waste gas incineration system, the utility model can overcome the self-weight of the valve plate and the valve rod through the spring to achieve safe reset under the condition of power failure and gas failure, avoid the explosion caused by the accumulation of VOCs concentration in the pipeline due to the failure of the emergency bypass valve to open, and ensure the safe operation of the RTO waste gas incinerator equipment. The sealing ring arranged on the bottom surface of the valve plate can increase the airtightness of the valve plate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] In the drawing, 1 is a cylinder barrel, 2 is a cylinder seat, 3 is a valve plate, 4 is a valve rod, 5 is a valve body, 51 is an air inlet port, 52 is an exhaust port, 6 is a shaft seal, 7 is a cylinder piston, 8 is a spring, 9 is a cylinder piston rod, 10 is a sealing ring, 11 is a sealing ring clamping groove, and 12 is a shaft coupling. DETAILED DESCRIPTION

[0019] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Please refer to Figure 1 The utility model provides a single -acting poppet valve, including valve body 5 and valve plate subassembly, valve body 5 is cavity structure and is provided with air inlet port 51 and exhaust port 52, is fixedly arranged with cylinder subassembly on the upper portion of valve body 5,

[0021] For air inlet port 51 and exhaust port 52 more specifically, air inlet port 51 and exhaust port 52 are integrated with valve body 5, air inlet port 51 is located in the vertical direction of valve body 5, exhaust port 52 is located in the horizontal direction of valve body 5, preferably the number of exhaust port 52 is 2 and is located on both sides of air inlet port 51, in actual use, one of exhaust port 52 can be plugged or opened according to the need.

[0022] Valve plate subassembly includes valve plate 3, valve rod 4, valve plate 3 is located in the cavity of valve body 5 and is located directly above air inlet port 51, valve rod 4 is fixedly arranged on valve plate 3 and the upper end of valve rod 4 passes through valve body 5 upwards,

[0023] Cylinder subassembly includes cylinder barrel 1, cylinder piston 7, spring 8 and cylinder piston rod 9, cylinder piston 7 is movably arranged in cylinder barrel 1 and is further provided with cylinder piston rod 9 at the bottom of cylinder piston 7, the end of cylinder piston rod 9 passes through the bottom end cover of cylinder barrel 1 and is fixedly connected with valve rod 4, further, the cylinder piston rod 9 and valve rod 4 are connected through shaft coupling 12, shaft seal 6 is arranged on the top of valve body 5, valve rod 4 passes through shaft seal 6, shaft seal 6 is located outside valve body 5, can avoid that corrosive liquid in exhaust gas enters into shaft seal 6 and causes corrosion to shaft seal 6, spring 8 is located in cylinder barrel 1 and is connected between the bottom end cover of cylinder barrel 1 and cylinder piston 7, further, when valve plate 3 plugs air inlet port 51, spring 8 is in compression state, and the compression amount can be set according to the size of valve body 5.

[0024] In the case that the valve is in the closed state, when power loss and gas loss, the spring can lift the valve plate 3 by using its own elastic force.

[0025] In order to fix cylinder barrel 1, the device further includes cylinder seat 2, cylinder seat 2 is hollow structure to facilitate the passing of cylinder piston rod 9 and valve rod 4, cylinder seat 2 is fixedly arranged on valve body 5, and cylinder barrel 1 is arranged on cylinder seat 2.

[0026] The diameter of the valve plate 3 is greater than the inner diameter of the air inlet port 51, so that the valve plate 3 can completely block the air inlet port 51 when the valve is closed. A sealing ring clamping groove 11 is arranged at the bottom edge of the valve plate 3, and a sealing ring 10 is fixedly arranged in the sealing ring clamping groove 11. The sealing ring 10 is located outside the air inlet port 51 and improves the sealing performance of the valve plate 3 when the valve is closed. Further, the sealing ring 10 is made of graphite packing and is installed in the sealing ring clamping groove 11 through a fixing pin. The graphite packing is used for sealing hot water, superheated steam, heat transfer fluid, ammonia solution, hydrocarbon, low-temperature liquid and other media, and is mainly used for sealing valves, pumps and reaction kettles under high temperature, high pressure and corrosion-resistant media.

[0027] In use, the cylinder barrel 1 is connected to a gas source, and the cylinder piston 7 is pushed downward by gas pressure, so that the valve plate 3 blocks the air inlet port 51. In the case of power failure or gas failure, the spring 8 lifts the valve plate 3 to reset by its own elastic force, thereby avoiding the explosion caused by the concentration of VOCs.

[0028] Although the present application has been described with reference to the explanatory embodiments thereof, it is to be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the principles and spirit of the present application. More specifically, various modifications and improvements can be made to the components or layout of the subject combination layout within the scope of the present application, drawings and claims. In addition to the modifications and improvements to the components or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A single acting poppet valve comprising a valve body (5) and a valve plate assembly, characterised in that: The valve body (5) is a cavity structure and is provided with an air inlet port (51) and an air outlet port (52), and a cylinder assembly is fixedly arranged on the upper portion of the valve body (5); The valve plate assembly comprises a valve plate (3) and a valve rod (4), the valve plate (3) is located in the cavity of the valve body (5) and directly above the air inlet port (51), and the valve rod (4) is fixedly arranged on the valve plate (3) and the upper end of the valve rod (4) penetrates the valve body (5) upward. The cylinder assembly comprises a cylinder barrel (1), a cylinder piston (7), a spring (8) and a cylinder piston rod (9), the cylinder piston (7) is movably arranged in the cylinder barrel (1) and is further provided with the cylinder piston rod (9) at the bottom of the cylinder piston (7), the end of the cylinder piston rod (9) penetrates the bottom end cover of the cylinder barrel (1) and is fixedly connected with the valve rod (4), and the spring (8) is located in the cylinder barrel (1) and is connected between the bottom end cover of the cylinder barrel (1) and the cylinder piston (7).

2. A single acting poppet valve according to claim 1, characterized in that: Further comprising a cylinder seat (2), the cylinder seat (2) is fixedly arranged on the valve body (5), and the cylinder barrel (1) is arranged on the cylinder seat (2).

3. A single acting poppet valve according to claim 1, characterized in that: The cylinder piston rod (9) and the valve rod (4) are connected through a shaft coupling (12), and a shaft seal (6) is arranged on the top of the valve body (5), and the valve rod (4) penetrates the shaft seal (6).

4. A single acting poppet valve according to claim 1, characterized in that: The diameter of the valve plate (3) is greater than the inner diameter of the air inlet port (51), and a sealing ring clamping groove (11) is arranged at the edge of the bottom surface of the valve plate (3), and a sealing ring (10) is fixedly arranged in the sealing ring clamping groove (11).

5. A single acting poppet valve according to claim 4, characterised in that: The material of the sealing ring (10) is graphite packing, and the sealing ring (10) is installed in the sealing ring clamping groove (11) through a fixing pin.

6. A single acting poppet valve according to claim 1, characterized in that: The air inlet port (51) is located in the vertical direction of the valve body (5), and the air outlet port (52) is located in the horizontal direction of the valve body (5).

7. A single acting poppet valve according to claim 1 wherein: When the valve plate (3) blocks the air inlet port (51), the spring (8) is in a compressed state.

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