CN207454432U - A kind of Direct Action Type cone valve type seawater overflow valve - Google Patents

Abstract

The utility model relates to a direct-acting cone valve type seawater overflow valve. Including the valve body, the rear screw cap set at the left end of the valve body, the bonnet at the right end of the valve body, the lock nut, the adjusting nut, and the valve core, the left spring seat, the guide sleeve and the spring inside the bonnet arranged in sequence in the valve body , Right spring seat, adjusting screw. There are axial through holes, radial blind holes and tapered grooves on the valve seat, countersunk grooves, radial through holes and axial blind holes on the left and right ends of the valve core. The bonnet forms a guide surface, the taper surface at the right end of the spool and the valve seat form a poppet valve port, and the left spring seat contacts and cooperates with the spool. The left spring seat is guided by the inner hole of the guide sleeve. There are oil holes on the guide sleeve. The right end of the spring matches with the right spring seat. The adjusting screw is matched with the bonnet, the adjusting nut is threadedly connected with the bonnet, and the locking nut is threadedly connected with the bonnet. The utility model is suitable for a pressure control valve with seawater as the working medium. Compared with similar valves, it has simple structure, high stability, good anti-cavitation performance and low noise.

Description

A direct-acting cone valve type seawater overflow valve

technical field

The utility model relates to a direct-acting cone valve type seawater overflow valve, which is suitable for a pressure control element in a hydraulic system with seawater as a medium.

Background technique

Relief valves are commonly used pressure control components in hydraulic systems. Traditional relief valves mainly use oil as the transmission medium, and using oil as the medium is prone to pollution and potential safety hazards. Water pressure relief valves are non-combustible and pollution-free , health, energy saving and other advantages, more and more attention, and in recent years with the development of materials science, tribology, precision machining technology and other disciplines, pure water hydraulic transmission has been developed rapidly, and because of the low density of water, poor viscosity , Corrosion and other characteristics, so that the water pressure relief valve has serious problems such as wear, corrosion, cavitation and leakage.

As a key component of water pressure control technology, overflow valve has received extensive attention. There is an inconsistency between the traditional hydraulic control valve design theory and the water medium, so we need to improve and innovate on materials, design parameters, wear mechanism, structure, and manufacturing.

Contents of the invention

The utility model provides a direct-acting cone valve type seawater overflow valve, which is used to solve common problems of overflow valves using water as a medium, improve stability, reduce leakage, reduce cavitation, reduce noise, and improve stability.

Its technical scheme of the utility model is as follows:

The utility model provides a direct-acting cone valve type seawater overflow valve, which comprises a valve body, a rear screw cover arranged at the left end of the valve body, a valve cover at the right end of the valve body, a locking nut, an adjusting nut, and sequentially Set spool, left spring seat, spring in the guide sleeve and valve cover, right spring seat, adjusting screw. There are axial through holes, radial blind holes and tapered grooves on the valve seat, countersunk grooves, radial through holes and axial blind holes on the left and right ends of the valve core. 1. The bonnet forms the guide surface, the cone surface at the right end of the valve core and the valve seat form the valve port of the cone valve, and the left spring seat is in contact with the valve core. The left spring seat is guided by the inner hole of the guide sleeve. There are oil holes on the guide sleeve. The right end of the spring is matched with the right spring seat. The adjusting screw is matched with the bonnet, the adjusting nut is threaded with the bonnet, and the lock nut is threaded with the bonnet. The utility model is suitable for a pressure control valve with seawater as the working medium.

There are countersunk grooves, radial through holes and axial blind holes at the left and right ends of the spool. The cylindrical surface at the left end of the spool forms a guiding surface with the valve body and bonnet, which improves the stability of movement and reduces polarization. The rear screw cover forms a damping chamber, and through the change of the volume of the damping chamber, movement resistance is generated and the working stability is improved.

The conical surface of the valve core and the annular step hole of the valve seat form a two-stage throttling cone valve port, which enhances the anti-cavitation ability and reduces leakage.

The adjusting nut is threadedly connected with the screw cap, and the adjusting screw rod is in contact with the adjusting nut. When the adjusting nut is rotated, the right spring seat is moved by the adjusting screw rod to adjust the spring force.

Compared with similar valves, the direct-acting cone valve type seawater overflow valve provided by the utility model has the advantages of simple structure, high stability and longer service life.

Description of drawings

Fig. 1 is a structural diagram of a direct-acting cone valve type seawater overflow valve of the present invention.

Fig. 2 is the implementation scheme of the utility model valve core and valve seat secondary throttling valve port.

Detailed ways

Below in conjunction with accompanying drawing 1 and accompanying drawing 2, the utility model is further described by embodiment.

As shown in Figure 1, the overflow valve includes a valve body (2), a rear screw cover (1) arranged at the left end of the valve body, a valve cover (7) at the right end of the valve body, a lock nut (10), and an adjustment nut (12) , and the valve seat (3), valve core (4), guide sleeve (5), left spring seat (6) and spring (8) in the bonnet, right spring seat ( 9), adjust the screw (11). The valve seat (3) has axial through holes, radial blind holes and tapered grooves, and the valve core (4) has countersunk grooves, radial through holes and axial blind holes. The rear screw cover (1) forms a damping chamber, the cylindrical surface of the left end of the valve core (4) forms a guiding surface with the valve body (2) and the valve seat (3), and the right cone surface of the valve core (4) forms a cone with the valve seat (3). At the valve port, the left spring seat (6) is in contact with the spool (4) to transmit the pressure regulating spring force. The left spring seat (6) is guided with the inner hole of the guide sleeve (5). The guide sleeve (5) is provided with an oil hole, and the right end is provided with an annular groove; the right end of the spring (8) is matched with the right spring seat (9). The adjusting screw rod (11) is matched with the valve cover (7), the adjusting nut (12) is threaded with the valve cover (7), and the lock nut (10) is threaded with the valve cover (7).

The working principle and working process of a direct-acting cone valve type seawater overflow valve provided by the utility model:

When working, high-pressure water enters the radial blind hole of the valve seat (3) from the water inlet P, then enters the radial through hole of the valve core (4), and then enters through the axially elongated hole of the valve core (4) The damping chamber formed between the spool (4) and the valve seat (3), hydraulic pressure acts on the spool through the damping chamber, when the liquid pressure is greater than the previously set working pressure, the spool moves to the right, the valve port opens, and the liquid Flow through the valve port, pass through the flow hole of the guide sleeve (5), enter the spring cavity, and then flow out from the water outlet. The working pressure of the overflow valve drives the adjusting screw (11) and the right spring seat (9) through the adjusting nut (12), and changes the expansion and contraction of the spring (8) to change the working pressure. The guide surface of the guide sleeve (5) and the inner chamber of the valve cover (7) can prevent the spring from being eccentric and improve stability. And through the damping cavity between the valve core (4) and the valve seat (3), motion damping is formed, pressure variation is reduced, the precision of the overflow valve is improved and the service life is increased.

Fig. 2 is the implementation scheme of the utility model valve core and valve seat secondary throttling valve port. When the relief valve is working, the liquid flows into the damping chamber formed by the countersink groove of the valve core (4) and the valve seat (3) through the slender hole of the valve core (4), and the working pressure of the liquid is transmitted to the The spool (4), when the working pressure is high, the spool (4) slides, flows through the secondary throttle port formed between the spool (4) and the valve seat (3), and passes through the secondary throttle valve Mouth, can reduce the hazard of cavitation.

Claims (4)

1. a kind of Direct Action Type cone valve type seawater overflow valve, including valve body（2）, it is arranged on the rear blind nut of valve body left end（1）, valve body it is right The valve deck at end（7）, locking nut（10）, adjusting nut（12）And in valve body（2）The valve seat inside set gradually（3）, spool （4）, guide sleeve（5）, left spring seat（6）With the spring in valve deck（8）, right spring base（9）, adjusting screw rod（11）, valve seat（3）It opens There are axial through hole, the blind hole of radial direction and cone tank, spool（4）It is provided with countersunk head slot, radial through-hole and axial blind hole, countersunk head Slot and rear blind nut（1）Form damping cavity, spool（4）Left end cylindrical surface and valve body（2）, valve seat（3）Form guide surface, spool（4） The right end conical surface and valve seat（3）Form cone valve valve port, left spring seat（6）With spool（4）It is engaged, transfers pressure spring power, it is left Spring base（6）With guide sleeve（5）Endoporus is oriented to, guide sleeve（5）On be provided with through flow hole, right end is provided with annular groove, spring（8）It is right End and right spring base（9）It is engaged, adjusting screw rod（11）With valve deck（7）It is engaged, adjusting nut（12）With valve deck（7）Screw thread connects It connects, locking nut（10）With valve deck（7）It is threadedly coupled.

2. a kind of Direct Action Type cone valve type seawater overflow valve according to claim 1, it is characterized in that spool（4）It is provided with countersunk head Slot, radial through-hole and axial blind hole, countersunk head slot and rear blind nut（1）Form damping cavity.

3. a kind of Direct Action Type cone valve type seawater overflow valve according to claim 1, it is characterized in that spool（4）Tapered face and valve Seat（3）Ring-shaped step hole forms two-step throttle cone valve mouth.

4. a kind of Direct Action Type cone valve type seawater overflow valve according to claim 1, it is characterized in that adjusting nut（12）With valve Lid（7）It is threadedly coupled, adjusting screw rod（11）With adjusting nut（12）It is engaged, rotates adjusting nut（12）, make adjusting screw rod （11）It is mobile to drive right spring base（9）It is mobile, adjust spring force.