CN201288860Y - Water hydraulic inverted valve - Google Patents

Abstract

The utility model provides a one-way valve of a hydraulic system. It includes a valve body, the valve body is provided with a valve core, the upper and lower ends of the valve body are respectively connected to the upper valve cover and the lower valve cover, the valve body and the upper valve cover, and the valve body and the lower valve cover are sealed. The upper bonnet and the lower bonnet are provided with water inlet and outlet passages, and a spring is arranged between the valve core and the upper bonnet. The spool is also provided with a flow hole through the upper and lower sides of the valve inner cavity, and the water inlet at the lower end of the flow hole is located above the joint between the spool and the seat of the spool. The utility model has the advantages of low cost, simple and compact structure, reliable operation, no leakage and long service life, and can be widely used in the design and manufacture of hydraulic systems.

Description

One-way valve for hydraulic system

technical field

The utility model relates to a water valve.

Background technique

After the 1980s, due to the requirements of environmental protection and the emergence of the oil crisis, hydraulic drive technology has attracted people's attention. The check valve is an important valve part of the hydraulic system. Compared with the hydraulic valve that uses oil as the working medium, the water hydraulic transmission technology that directly uses natural seawater or fresh water as the hydraulic working medium is safe, compatible with the environment, energy-saving and economical. , sanitation and other characteristics can satisfy people's desire for safety, economy and environmental protection to the greatest extent, and meet the needs of sustainable development of human beings. Therefore, hydraulic drive technology has become a frontier subject in today's international hydraulic technology field, and has extremely broad application prospects. However, as a hydraulic transmission medium, water has the characteristics of poor lubricity, high corrosion, and low viscosity compared with mineral hydraulic oil, which has new requirements for product structure, material selection, process, and sealing.

Contents of the invention

The technical problem to be solved by the utility model is to provide a hydraulic system check valve which can directly use natural seawater or fresh water as the working medium. Therefore, the utility model adopts the following technical solutions: it includes a valve body, a valve core is arranged in the valve body, the upper and lower ends of the valve body are respectively connected with the upper valve cover and the lower valve cover, and the valve body is connected with the upper valve cover, the valve Both the body and the lower bonnet are sealed. The upper bonnet and the lower bonnet are provided with water inlet and outlet channels. A spring is provided between the spool and the upper bonnet. The tapered structure is matched with the valve core seat, and the valve core is also provided with a flow hole through the upper and lower sides of the valve inner cavity, and the water inlet at the lower end of the flow hole is located above the joint between the valve core and the valve core seat.

Through the above technical solutions, the utility model has the advantages of low cost, simple and compact structure, reliable operation, no leakage and long service life, and can be widely used in the design and manufacture of hydraulic systems.

Description of drawings

Fig. 1 is a longitudinal sectional view of Embodiment 1 of the present utility model.

Detailed ways

With reference to accompanying drawing, the utility model comprises valve body 3, is provided with spool 4 in valve body 3, and the upper and lower ends of valve body 3 are respectively connected upper valve cover 1 and lower valve cover 7, and the connection between valve body 3 and upper valve cover 1 There is a sealing ring 2 between them, and a sealing ring 8 is arranged between the valve body 3 and the lower valve cover 7 .

The upper bonnet 1 and the lower bonnet 7 are provided with a water inlet and outlet channel 9, and a spring 5 is provided between the valve core 4 and the upper bonnet 1, one end of the spring 5 is against the bottom wall of the upper bonnet 1, and the other end is against the spool 4 .

In the utility model, the head of the valve core 4 adopts a tapered structure 13 with a soft seal, and the cone angle of the valve core 4 is designed to be 60°. The lower valve cover 7 is provided with a valve core seat 10 matching the tapered structure. In the seawater environment, the conical spool of the suction valve can well prevent jamming and clogging caused by marine organisms and microorganisms. Because the sealing surface is tapered, it has a certain guiding effect, which can ensure the accuracy of the up and down movement of the valve core 4, and also has a certain self-positioning compensation function.

A soft seal is adopted between the spool 4 and the lower bonnet 7, that is, a soft sealing ring 6 is also provided between the spool 4 and the spool seat 10, which can ensure a good airtight performance. In addition, the concentricity between the conical surface (sealing surface) and the cylindrical surface (guiding surface) of the valve core 4 is relatively easy to ensure. The spool 4 is provided with a flow hole or a groove 11 that runs through the valve body cavity up and down, and the water inlet 12 at the lower end of the flow hole or the groove 11 is located above the matching place of the spool and the spool seat.

In the utility model, the valve core 4 is made of hard and light non-metallic material, such as engineering plastics, which can have better water corrosion resistance, light weight, low inertia, low noise, flexible opening and closing, and can be used as a suction valve or as a suction valve. Can be used as a pressure valve.

In summary, the utility model has the advantages of low cost, simple and compact structure, reliable operation, large flow capacity, corrosion resistance, good sealing performance, less leakage, sensitive action, strong anti-pollution ability, energy saving and environmental protection, long service life, and convenient maintenance and repair. It is suitable for high-pressure and large-flow hydraulic systems, and can be widely used in the design and manufacture of hydraulic systems.

Finally, it should also be noted that the above are only implementation examples of the present utility model. Apparently, the implementation of the present utility model is not limited to the above embodiments, and many variations are possible. All deformations that a person of ordinary skill in the art can derive or associate directly from the content disclosed in the utility model shall be considered as the protection scope of the utility model.

Claims (3)

1. A hydraulic system check valve, comprising a valve body, characterized in that the valve body is provided with a valve core, the upper and lower ends of the valve body are respectively connected to the upper valve cover and the lower valve cover, and the valve body and the upper valve The cover, the valve body and the lower bonnet are all sealed. The upper bonnet and the lower bonnet are provided with water inlet and outlet channels. There is a spring between the valve core and the upper bonnet. A valve core seat matching the tapered structure is provided, and the valve core is also provided with a flow hole through the upper and lower sides of the valve body cavity, and the water inlet at the lower end of the flow hole is located above the joint between the valve core and the valve core seat. 2. A hydraulic system check valve as claimed in claim 1, characterized in that the valve core is made of engineering plastics. 3. A hydraulic system check valve according to claim 1, characterized in that it is also provided with a sealing ring for sealing the valve core and the valve core seat.

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