CN201802694U

CN201802694U - Plug-in type throttling valve with annular cross section

Info

Publication number: CN201802694U
Application number: CN2010205322691U
Authority: CN
Inventors: 张小凡
Original assignee: Actuant China Industries Co Ltd
Current assignee: Actuant China Industries Co Ltd
Priority date: 2010-09-17
Filing date: 2010-09-17
Publication date: 2011-04-20
Anticipated expiration: 2020-09-17

Abstract

The utility model discloses a plug-in type throttling valve with an annular cross section. A valve core is plugged in a hollow inner cavity of a valve body, an annular gap Delta is formed between the long stem part of the valve core and the inner cavity of the valve body, the valve body is provided with small holes and a plurality of check rings, and a plurality of O-shaped rings are arranged between the valve core and the inner cavity of the valve body. The throttling valve has the advantages that the flow rate passing through the throttling valve can be adjusted only by regulating the length L of the annular gap, and an oil line is not easy to block.

Description

Plug-in type circular crosssection throttle valve

Technical field

The utility model relates to a kind of plug-in type circular crosssection throttle valve, is applicable in the decline process of synchronization of jacking up system, also can be used in single oil cylinder or other oil hydraulic circuits flow being carried out the throttling buffering.

Background technique

The circular crosssection throttle valve is mainly used in the decline process of synchronization of jacking up system, and when the oil cylinder in the system descended, owing to born load on the oil cylinder, if do not use throttle valve, it was too fast to cause load to descend, and might cause damage to load.Too fast speed also may cause control system overshoot and can't guarantee the synchronous of system's oil cylinder.General throttle valve adjustment scope is wide, but degree of regulation is lower, and the flow-rate ratio that accesses actual demand is difficult.The flow that the throttle valve that has can pass through is very little very accurate, but results in blockage easily.

The model utility content

Technical problem to be solved in the utility model is that a kind of energy accurate flow adjustment will be provided, and is difficult for causing the plug-in type circular crosssection throttle valve of oil circuit obstruction.

In order to solve above technical problem, the utility model provides a kind of plug-in type circular crosssection throttle valve, in the hollow cavity of valve body, be fitted with spool, form annulus δ between the stock portion of spool and the body cavity, valve body is provided with aperture and a plurality of back-up ring, is provided with a plurality of O type circles between spool and body cavity.

Less more accurate in order to make by the flow of this valve body, so annulus δ is 0.01mm～0.05mm.Annulus δ throttling formula is

Wherein qv is a flow, and D is a valve core diameter, and δ is the annulus, and △ p is a pressure difference between the gateway, and μ is a flow coefficient, and L is the length of annulus.Under the constant substantially situation of other conditions, the annulus length L is long more, and then flow is more little, and vice versa.

Superior effect of the present utility model is:

1) length L that needs to regulate the annulus, promptly can regulate is through the flow of throttle valve;

2) if there is impurity to enter throttle valve, even certain that stopped up the annulus a bit, other parts of annular still can make the hydraulic oil process, are not easy to cause oil circuit to stop up.

Description of drawings

Fig. 1 is a structure sectional view of the present utility model;

Fig. 2 is the enlarged view of the local A of Fig. 1;

Fig. 3 is the enlarged view of the local B of Fig. 1;

The sectional view that Fig. 4 screws out for the utility model spool;

Fig. 5 is the enlarged view of the local A of Fig. 4;

Fig. 6 is the enlarged view of the local B of Fig. 4;

The number in the figure explanation

1-valve body; 2-spool;

3-O type circle; 4-back-up ring;

5-aperture; 6-annulus.

Embodiment

See also shown in the accompanying drawing, the utility model will be further described.

As Fig. 1-shown in Figure 6, model utility provides a kind of plug-in type circular crosssection throttle valve, in the hollow cavity of valve body 1, be fitted with spool 2, form annulus δ 6 between the stock portion of spool 2 and valve body 1 inner chamber, valve body 1 is provided with aperture 5 and a plurality of back-up ring 4, is provided with a plurality of O type circles 3 between spool 2 and valve body 1 inner chamber.

Hydraulic oil flows into from the aperture 5 of valve body 1 right-hand member, annulus δ 6 between spool 2 and the valve body 1 flows through, aperture 5 from the valve body 1 flows out up or down again, O type circle 3 and back-up ring 4 on spool 2 and the valve body 1 seal, make hydraulic oil only the aperture 5 on annulus δ 6 and the valve body 1 flow through.

Regulate flow as needs, then spool 2 screw-ins or back-out are got final product.The degree flow as required that screws out comes fixed.As shown in Figure 2, the degree of back-out is high more, and the annulus length L is short more, and then flow is big more.

Claims

1. plug-in type circular crosssection throttle valve, it is characterized in that: be fitted with spool in the hollow cavity of valve body, form the annulus between the stock portion of spool and the body cavity, valve body is provided with aperture and a plurality of back-up ring, is provided with a plurality of O type circles between spool and body cavity.

2. plug-in type according to claim 1 circular crosssection throttle valve is characterized in that: described annulus δ is 0.01mm～0.05mm.