A vacuum-break valve pneumatic damping buffer device

Abstract

The utility model belongs to vacuum break valve technical field discloses a kind of vacuum break valve pneumatic damping buffer device, including valve body, main shaft, the one end of main shaft is located at the outside of valve body and is slidably connected with valve body, the both sides of main shaft are symmetrically equipped with the pneumatic damping mechanism parallel with its central axis, pneumatic damping mechanism includes cylinder and valve assembly for controlling cylinder air intake and exhaust volume, fixed piece is connected between the output shaft of two cylinders, and fixed piece is connected with main shaft.The utility model is equipped with pneumatic damping mechanism at valve wheel, while closing valve by main shaft, pneumatic damping mechanism provides buffer force for valve clack, eliminates the harm brought by violent impact of valve clack and valve seat, prolongs equipment service life, eliminates the danger of life injury to surrounding operator.In addition, the size of pneumatic damping can be freely adjusted by operator through handle switch, and it is simple to operate and practical.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum breaker valve technology, specifically relating to a pneumatic damping buffer device for a vacuum breaker valve. Background Technology

[0002] The electromagnetic vacuum breaker valve is installed above the hump (highest point) of a siphon-type water conveyance pipeline, acting as a rapid gate in the siphon outlet pipe. For example, the Siyang sluice gate station uses a dike-type block foundation structure with an elbow-shaped inlet channel and a siphon outlet channel, employing an HX-DP electromagnetic siphon breaker valve for flow interruption. The structure of this electromagnetic vacuum breaker valve is as follows: Figure 1 As shown, the valve includes a valve body 1, a main shaft 2, valve discs 3, valve seats 4, a main electromagnetic operating mechanism 5, an auxiliary electromagnetic operating mechanism 6 (not shown in detail in the figure), an air chamber 7, a water chamber 8, and a crank handle 9. Its working principle is as follows: When the valve electrical control module is powered on, the main electromagnetic operating mechanism 5 and the auxiliary electromagnetic operating mechanism 6 are attracted by the electromagnets, and the main shaft 2 moves. The two valve discs 3 installed on the main shaft 2 are sealed with rubber sealing rings and two valve seats 4. At this time, the air in the water chamber 8 and the air chamber 7 is blocked, forming a siphon. When the valve electrical control module is de-energized, the electromagnets immediately separate. Under the driving action of the energy storage spring (existing technology, not shown in the figure), the two valve discs 3 on the main shaft 2 move, and the valve discs 3 and valve seats 4 are rapidly separated. Due to the negative pressure vacuum in the main pipeline, the air rushes into the water chamber through the air chamber and connects with the main pipeline, destroying the siphon phenomenon and realizing water diversion and flow interruption. Because the valve closing process is completed instantaneously (t<0.5s), the short time and strong electromagnetic force cause the valve disc 3 to directly impact the valve seat 4, resulting in a violent impact on the rubber sealing ring. This affects the service life of the equipment and can easily cause personal injury to nearby operators. Therefore, it is urgent to improve the existing vacuum breaker valve structure by adding a pneumatic damping mechanism. This mechanism will provide a buffer force to the valve spindle when the valve completes its closing action, eliminating the damage caused by the violent impact, extending the service life of the equipment, and eliminating the risk of personal injury to nearby operators. Utility Model Content

[0003] This utility model addresses the shortcomings of the prior art by providing a pneumatic damping buffer device for a vacuum breaker valve. By adding a pneumatic damping mechanism, the device provides a buffer force to the valve spindle when the valve completes its closing action, eliminating the harm caused by violent impacts, extending the service life of the equipment, and eliminating the danger of personal injury to surrounding operators.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A pneumatic damping buffer device for a vacuum breaker valve includes a valve body and a main shaft. One end of the main shaft is located outside the valve body and is slidably connected to the valve body. The device is characterized in that: pneumatic damping mechanisms are symmetrically arranged on both sides of the main shaft and are parallel to its central axis. The pneumatic damping mechanism includes a cylinder and a valve assembly for controlling the amount of air entering and leaving the cylinder. A fixing member is connected between the output shafts of the two cylinders and the fixing member is connected to the main shaft.

[0006] Preferably, the valve assembly includes a four-way valve, a pressure gauge for measuring the internal pressure of the cylinder, a check valve for charging the cylinder, and a handle switch for controlling the exhaust of the cylinder. The four ports of the four-way valve are respectively connected to the cylinder, the pressure gauge, the check valve, and the handle switch.

[0007] Preferably, the distance between the fixing member and the valve body is greater than the stroke distance of the main shaft during the vacuum breaker valve closing process.

[0008] Preferably, the fixing member is a plate-shaped structure with mounting holes at both ends that are adapted to the end of the cylinder's output shaft. Two fastening nuts are threaded onto the output shaft of each cylinder, and the two fastening nuts are located on both sides of the corresponding mounting holes.

[0009] Preferably, a positioning element is connected to the cylinder, and the positioning element is bolted to the valve body.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention incorporates a pneumatic damping mechanism at the valve handwheel. While the main shaft closes the valve, the pneumatic damping mechanism provides a buffer force to the valve disc, eliminating the hazards caused by the violent impact between the valve disc and the valve seat, extending the equipment's service life, and eliminating the risk of personal injury to nearby operators. Furthermore, the buffer force can be freely adjusted by the operator using a handle switch, making it simple to operate and highly practical. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of an existing electromagnetic vacuum breaker valve (valve closed).

[0014] Figure 2 This is a schematic diagram of the vacuum breaker valve of this utility model (valve closed).

[0015] Figure 3 This is a schematic diagram of the vacuum breaker valve of this utility model (open valve state);

[0016] Figure 4This utility model Figure 2 , 3 Schematic diagram of the right-side structure

[0017] In the diagram: 1. Valve body, 2. Main shaft, 3. Valve disc, 4. Valve seat, 5. Main electromagnetic operating mechanism, 6. Auxiliary electromagnetic operating mechanism, 7. Air chamber, 8. Water chamber, 9. Handle, 10. Cylinder, 11. Four-way valve, 12. Pressure gauge, 13. Check valve, 14. Hand switch, 15. Fixing component, 16. Fastening nut. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] In the description of this utility model, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figure 2 and Figure 3 As shown, a pneumatic damping buffer device for a vacuum breaker valve includes a valve body 1 and a main shaft 2. One end of the main shaft is located outside the valve body and slidably connected to it. Symmetrically arranged on both sides of the main shaft are pneumatic damping mechanisms parallel to its central axis. Each pneumatic damping mechanism includes a cylinder 10 and a valve assembly for controlling the air intake and exhaust of the cylinders. A fixing member 15 connects the output shafts of the two cylinders and is connected to the main shaft. This invention utilizes two pneumatic damping mechanisms to provide buffering force for the valve disc during valve closing, eliminating the damage caused by the violent impact between the valve disc and the valve seat, extending the service life of the equipment, and eliminating safety hazards. Figure 4As shown, the valve assembly includes a four-way valve 11, a pressure gauge 12, a check valve 13, and a handle switch 14. The four ports of the four-way valve are respectively connected to the cylinder, pressure gauge, check valve, and handle switch. The handle switch is used for venting and releasing air from the cylinder during buffering. The check valve is a one-way valve; when the cylinder's output shaft returns to its original position (when the output shaft length is at its minimum), air enters the cylinder through the check valve. The pressure gauge is used to measure the internal pressure of the cylinder. In this embodiment, the cylinder is a Delixi CYLINDERSC80X150; the pressure gauge is a 1.6 MPa pressure gauge. When the four-way valve handle switch is in its 1 / 4 position (the position can be adjusted according to actual use), the pressure gauge reading is 0.1 MPa when the main shaft moves, achieving the effect of pneumatic damping. The auxiliary electromagnetic operating mechanism closes the valve while the cylinder provides buffering force. This invention uses a four-way valve to control the exhaust volume, achieving the effect of pneumatic damping; the magnitude of the pneumatic damping can be adjusted according to the handle switch.

[0022] like Figure 2 and Figure 3 As shown, the distance between the fixing component and the valve body is greater than the stroke distance of the main shaft during the vacuum breaker valve closing process. This prevents the fixing component from colliding with the valve body and causing damage when it moves with the main shaft in the valve body direction. The fixing component is a plate-shaped structure made of special steel plate, with mounting holes at both ends that are adapted to the output shaft end of the cylinder. Two fastening nuts 16 are threaded onto the output shaft of each cylinder, located on both sides of the corresponding mounting hole. The two fastening nuts can effectively lock and fix the fixing component and the output shaft of the cylinder. To facilitate the installation of the cylinder and the valve body, a positioning component 17 is connected to the cylinder. The positioning component and the valve body are assembled and connected by bolts 18, which facilitates disassembly and maintenance.

[0023] The working principle of this utility model is as follows:

[0024] In the open state, the valve disc 3 and valve seat 4 of this invention's vacuum breaker valve are separated, and the output shaft of cylinder 10 is at its minimum length. When the valve's electrical control module is energized, the main shaft 2 moves to the right under the action of the electromagnet, simultaneously driving the two valve discs 3 to move closer to the valve seat 4. The output shaft of cylinder 10 drives the piston inside the cylinder body to move to the right, using the pressure inside the cylinder body to provide resistance to the movement of the main shaft, thereby slowing down the closing speed of valve discs 3 and valve seat 4. The magnitude of the resistance depends on the pressure inside cylinder 10, which can be freely adjusted via the handle switch 14.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

Claims

1. A pneumatic damping buffer device for a vacuum breaker valve, comprising a valve body and a main shaft, one end of the main shaft being disposed outside the valve body and slidably connected to the valve body, characterized in that: The main shaft is symmetrically provided with pneumatic damping mechanisms parallel to its central axis on both sides. The pneumatic damping mechanism includes a cylinder and a valve assembly for controlling the amount of air entering and leaving the cylinder. A fixing member is connected between the output shafts of the two cylinders and the fixing member is connected to the main shaft.

2. The pneumatic damping buffer device for a vacuum breaker valve as described in claim 1, characterized in that: The valve assembly includes a four-way valve, a pressure gauge for measuring the internal pressure of the cylinder, a check valve for charging the cylinder, and a handle switch for controlling the exhaust of the cylinder. The four ports of the four-way valve are respectively connected to the cylinder, the pressure gauge, the check valve, and the handle switch.

3. The pneumatic damping buffer device for a vacuum breaker valve as described in claim 1, characterized in that: The distance between the fixing component and the valve body is greater than the travel distance of the main shaft during the vacuum rupture valve closing process.

4. The pneumatic damping buffer device for a vacuum breaker valve as described in claim 1, characterized in that: The fastener is a plate-shaped structure with mounting holes at both ends that are adapted to the output shaft end of the cylinder. Two fastening nuts are threaded onto the output shaft of each cylinder, and the two fastening nuts are located on both sides of the corresponding mounting hole.

5. The pneumatic damping buffer device for a vacuum breaker valve as described in claim 1, characterized in that: A positioning component is connected to the cylinder, and the positioning component is bolted to the valve body.

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