Anti-cavitation pressure reducing valve

Abstract

The utility model relates to the technical field of pipeline fittings, and discloses an anti-cavitation pressure reducing valve, which comprises a valve body, a valve rod, an O-shaped ring, a sealing ring, a valve disc, a spring, a diaphragm, a valve cover and an exhaust valve, and is characterized in that a valve seat is arranged on the valve body, the valve rod is arranged in the valve seat, the sealing ring is arranged on the valve seat, and the valve disc is arranged on the sealing ring. According to the anti-cavitation pressure reducing valve, the anti-cavitation pressure reducing valve comprises a valve body, a valve rod, an O-shaped ring, a sealing ring, a valve disc, a spring, a diaphragm, a valve cover and an exhaust valve, a valve seat is arranged on the valve body, meanwhile, a valve clack of the valve seat is designed in a cage winding mode, the cage winding type valve clack can reduce the corresponding flow speed of fluid in the using process, and therefore the valve body is protected against cavitation. The air flow caused by the reduction of the flow speed is reduced at the same time, cavitation can be well avoided, the service life of the valve body, the valve seat and the valve rod is greatly prolonged, manual exhaust operation can be carried out on the upper side of the valve cover, and the noise and vibration phenomena in the using process are reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline fittings technology, specifically to an anti-cavitation pressure reducing valve. Background Technology

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure by adjusting the pressure, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. From a fluid mechanics perspective, a pressure reducing valve is a throttling element with variable local resistance. That is, by changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, resulting in different pressure losses, thereby achieving the purpose of pressure reduction. However, in the process of using existing pressure reducing valves, when the outlet pressure ratio to inlet pressure ratio exceeds 1:3, cavitation is easily generated, which will cause wear on the valve seat, valve body, valve stem, valve disc, etc. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an anti-cavitation pressure reducing valve to solve the problem mentioned in the background art: when the outlet pressure ratio and inlet pressure ratio of existing pressure reducing valves exceed 1:3 during use, cavitation is easily generated, causing wear on the valve seat, valve body, valve stem, valve disc, etc.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-cavitation pressure reducing valve, comprising a valve body, a valve stem, an O-ring, a sealing ring, a valve disc, a spring, a diaphragm, a valve cover, and an exhaust valve. The valve body is provided with a valve seat, the valve seat contains a valve stem, the valve seat is provided with a sealing ring, the sealing ring is provided with a valve disc, the valve disc is provided with a diaphragm pressure plate, a diaphragm is provided between the valve disc and the diaphragm pressure plate, the valve stem is provided with a spring, an exhaust valve is provided at the top of the valve stem, the valve body is provided with a valve cover, and nuts and bolts are provided on both the left and right sides of the valve cover.

[0005] The valve body outlet side is connected to a ball valve, the ball valve is connected to a locking structure, the locking structure is connected to a pilot valve, and the valve body inlet side is connected to a needle valve.

[0006] Preferably, the valve disc of the valve seat adopts a cage-like design.

[0007] Preferably, a pressure gauge is provided between the valve body and the ball valve.

[0008] Preferably, the spring is in movable contact with the upper outer surface of the diaphragm pressure plate and the spring is in movable contact with the lower outer surface of the valve cover.

[0009] Preferably, the bolt passes through the valve cover and the valve body.

[0010] Preferably, an O-ring is provided at the connection between the valve stem and the valve seat / valve disc.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This anti-cavitation pressure reducing valve includes a valve body, valve stem, O-ring, sealing ring, valve disc, spring, diaphragm, valve cover, and vent valve. The valve body has a valve seat, the valve stem is located within the valve seat, the sealing ring is on the valve seat, the valve disc is on the sealing ring, the diaphragm pressure plate is on the valve disc, and a diaphragm is positioned between the valve disc and the diaphragm pressure plate. The valve stem has a spring, and a vent valve is located at the top of the valve stem. The valve body has a valve cover. The valve disc of the valve seat adopts a cage-like design. During use, the cage-like valve disc can reduce the flow velocity of the fluid, thus reducing the airflow and effectively preventing cavitation. This significantly increases the service life of the valve body, valve seat, and valve stem. Manual venting can also be performed on the upper side of the valve cover to reduce noise and vibration during use. Attached Figure Description

[0013] Figure 1 This is a side sectional view of the present invention.

[0014] In the diagram: 1. Valve body; 2. Valve stem; 3. O-ring; 4. Sealing ring; 5. Valve disc; 6. Spring; 7. Diaphragm; 8. Valve cover; 9. Nut; 10. Bolt; 11. Exhaust valve; 12. Valve seat; 13. Ball valve; 14. Locking structure; 15. Pilot valve; 16. Needle valve; 17. Pressure gauge; 18. Diaphragm pressure plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Referring to Figure 1, in order to address the problem that existing pressure reducing valves are prone to cavitation when the outlet pressure ratio exceeds 1:3, causing wear on the valve seat, valve body, valve stem, and valve disc, this utility model provides an anti-cavitation pressure reducing valve. The valve includes a valve body, valve stem, O-ring, sealing ring, valve disc, spring, diaphragm, valve cover, and exhaust valve. Its features include: a valve seat on the valve body; a valve stem within the valve seat; a sealing ring on the valve seat; a valve disc on the sealing ring; a diaphragm pressure plate on the valve disc; a diaphragm between the valve disc and the diaphragm pressure plate; a spring on the valve stem; an exhaust valve at the top of the valve stem; and a valve cover on the valve body, with nuts and bolts on both sides of the valve cover.

[0017] The valve body outlet side is connected to a ball valve, the ball valve is connected to a locking structure, the locking structure is connected to a pilot valve, and the valve body inlet side is connected to a needle valve.

[0018] Working principle: When using this anti-cavitation pressure reducing valve, the valve disc of the valve seat adopts a cage-like design. During use, the cage-like valve disc can reduce the flow rate of the fluid. The reduced flow rate also reduces the airflow, which can effectively prevent cavitation and greatly increase the service life of the valve body, valve seat and valve stem. Manual venting can also be performed on the upper side of the valve cover to reduce noise and vibration during use.

[0019] Compared with related technologies, the anti-cavitation pressure reducing valve provided by this utility model has the following beneficial effects: it can effectively prevent cavitation, greatly increase the service life of the valve body, valve seat and valve stem, and at the same time, it has the condition of manual venting, which can reduce noise and vibration during use.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cavitation-resistant pressure reducing valve, comprising a valve body, valve stem, O-ring, sealing ring, valve disc, spring, diaphragm, valve cover, and exhaust valve, characterized in that: The valve body is provided with a valve seat, the valve disc of the valve seat adopts a cage-like design, the valve seat is provided with a valve stem, the valve seat is provided with a sealing ring, the sealing ring is provided with a valve disc, an O-ring is provided at the connection between the valve stem and the valve seat and the valve disc, the valve disc is provided with a diaphragm pressure plate, a diaphragm is provided between the valve disc and the diaphragm pressure plate, the valve stem is provided with a spring, the spring is movably fitted with the upper outer surface of the diaphragm pressure plate, the spring is movably fitted with the lower outer surface of the valve cover, an exhaust valve is provided at the top of the valve stem, the valve body is provided with a valve cover, nuts and bolts are provided on both sides of the valve cover, and the bolts pass through the valve cover and the valve body; The valve body outlet side is connected to a ball valve, the ball valve is connected to a locking structure, the locking structure is connected to a pilot valve, the valve body inlet side is connected to a needle valve, and a pressure gauge is provided between the valve body and the ball valve.

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