CN2295086Y

CN2295086Y - Single-way pressure control valve

Info

Publication number: CN2295086Y
Application number: CN 97207169
Authority: CN
Inventors: 梅金月
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-04
Filing date: 1997-02-04
Publication date: 1998-10-21
Anticipated expiration: 2007-02-04

Abstract

The utility model relates to a valve, particularly a one-way pressure limiting valve with an inner valve core and an outer valve core. The utility model comprises a valve cover, a valve body, an inlet, an outlet, a passage, valve cores and springs, wherein the valve cover is connected with the valve body, the outlet and the inlet are positioned at both ends of the valve, the passage which is communicated with the inlet and the outlet is arranged in the valve, and the valve cores and the springs control the passage. The valve cores are respectively an inner valve core and an outer valve core, the left end surface of the outer valve core is contacted with the inner end surface of the inlet, and the right end of the outer valve core is provided with an outer spring. The left end of the inner valve core is positioned in the outer valve core, and the right end of the inner valve core is positioned in an inner cavity of the valve body. An inner spring is arranged between the inner valve core and the valve body.

Description

One-way pressure-limit valve

The utility model relates to valve, specifically a kind of one-way pressure-limit valve that has inside and outside spool.

In industries such as weaving, pharmacy, chemical industry, oil, some facility such as automation instrument etc. need limit its minimum pressure to working fluid mouth conveyance conduit.Therefore, adopt one-way valve and pressure-limit valve to be controlled mostly.The one-way valve that this utilization is independent and the form of pressure-limit valve exist to use installs trouble, and processing cost height, and problem such as be out of order easily can not satisfy demand of practical production.

The purpose of this utility model is a design one-way pressure-limit valve a kind of easy for installation, safe and reliable, to satisfy requirements of actual production.

Its main technical schemes comprises valve gap and the valve body that is coupled to each other, and be positioned at the inlet/outlet at two ends, the passage that is communicated with inlet/outlet is arranged in valve, and the spool that closes, closes and the spring of this passage of control, this spool has inner spool and outer spool, and the left side of outer spool can contact with the interior edge face of import, its right-hand member is installed outer spring, the left end of inner spool is positioned at outer spool, and right-hand member is positioned at the inner chamber of valve body, between spool and valve body inner spring is arranged; In the passage in valve, between the interior edge face of annular chamber in valve gap and valve body, between the annular chamber and outlet of through hole in valve body; The left side of inner spool is a sphere, between the sliding contact surface of inner spool and valve body seal ring is set, and the exhaust port of communication with cavity and outside is arranged on valve body, utilizes the screw attachment pad on the surface of contact of spool and import outside.

The utility model has the advantages that owing to the one-way valve and the pressure-limit valve that had simple function originally unite two into one, saved used raw material, reduced cost, installation is also more convenient with use, simultaneously, has reduced by a valve on pipeline, also just reduced by a fault point, thereby improved reliability.In addition, adopt the structure of inside and outside valve core type after, improved the sensitivity of action, satisfied requirements of actual production.

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the left view of Fig. 1.

As shown in the figure: whole valve utilizes screw thread to be coupled to each other by valve body 12 and valve gap 2 and forms, form the import 1 of valve in the inside of valve gap 2, the inner formation outlet 15 of the right-hand member of valve body 12, at the valve body middle part inner chamber 16 and annular chamber 10 are arranged, the through hole 13 of connection annular chamber 10 and outlet 15 is arranged at the skin of body cavity 16.Also have radially a vent 10 in valve body 12, be used for the atmosphere of communication with cavity 16 and outside, so that when inner spool 7 actions, eliminating may hinder the air in the inner chamber of its action.

The right-hand member of barrel-shaped inner spool 7 is positioned at inner chamber 16, and is slidingly matched with internal chamber wall, on the sliding contact surface of inner spool 7 and inner chamber seal ring 11 is set, and places axial inner spring 8 in the inside of inner spool 7, and the right-hand member of this spring 8 contacts with the end face of inner chamber 16.The left end of inner spool 7 is positioned at the inside of barrel-shaped outer spool 6, and move in the bucket of spool outside, the right-hand member of outer spool 6 has a step, and in this step end face and valve body 12, form between the interior edge face of annular chamber 10 and place the outer spring 9 that is enclosed within outside the inner spool, the left end of outer spool 6 utilizes screw 3, packing ring 4 connected spacers 5, and this pad 5 is when spool moves to left outside, can with valve gap 2 in form imports 1 interior edge faces contact so that the passage of cut-off valve where necessary.The left side that inner spool 7 contacts with outer spool 6 is a spherical shape.

During work, this valve is a normally open, and the left end of outer spool and the interior edge face of import are thrown off, and behind fluid footpath import, annular chamber, the through hole, flows out from outlet.When hydrodynamic pressure diminished, the pressure that acts on the spool reduced, and at this moment, inside and outside spool is moved to the left under the effect of inside and outside spring, made the pad of outer spool left end closely contact the passage of cut-off valve with the import inner cavity surface.When hydrodynamic pressure increases to again when being enough to offset the active force of inside and outside spring, inside and outside spool moves to right, and the passage of valve is opened.When inside and outside spool moved to right, unnecessary gas drained in the atmosphere through exhaust port in the inner chamber.

Claims

1, one-way pressure-limit valve, comprise the valve gap (2) and valve body (12) that are coupled to each other, and be positioned at advancing of valve two ends, outlet (1), (5), in valve, have and be communicated with to advance, outlet (1), (5) passage, and the spool and the spring of this passage of control, it is characterized in that spool has inner spool (7) and outer spool (6), the left side of outer spool (6) can contact with the interior edge face of import (1), its right-hand member is installed outer spring (9), the left end of inner spool (7) is positioned at outer spool (6), right-hand member is positioned at the inner chamber (16) of valve body (12), between inner spool (7) and valve body (12) inner spring (8) is arranged.

2, valve according to claim 1 is characterized in that annular chamber (10) is positioned between the interior edge face of valve gap (2) and valve body (12) in the passage in the valve, and through hole (13) is positioned between the annular chamber (10) and outlet (15) of valve body (12).

3, valve according to claim 1, the left side that it is characterized in that inner spool (7) is a sphere, between the sliding contact surface of inner spool (7) and valve body (12), seal ring (11) is set, the exhaust port (14) of communication with cavity (16) and outside is arranged on valve body (12).

4,, it is characterized in that utilizing screw (3) connected spacer (5) on the surface of contact of spool (6) and import (1) outside according to the described valve of claim.