CN202228747U

CN202228747U - Balanced type depressurizing valve

Info

Publication number: CN202228747U
Application number: CN2011203723292U
Authority: CN
Inventors: 康婵娟; 成其新; 于邦仲
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-28
Filing date: 2011-09-28
Publication date: 2012-05-23
Anticipated expiration: 2021-09-28

Abstract

The utility model relates to a balanced type depressurizing valve capable of accurately regulating pressure. The balanced type depressurizing valve comprises a valve body, wherein an upper cover is sleeved on the upper part of an air cavity of the valve body in an airtight mode; a pressure regulating mechanism which has functions of modulating the pressure and limiting the travel of a valve core is arranged at an upper opening of an upper valve; an air pressure regulating cavity is formed between the pressure regulating mechanism and the upper cover; a diaphragm of the pressure regulating mechanism is connected with a fixed screw; a valve sleeve is sleeved in a cavity body of the upper cover in the airtight mode; the air cavity, at the bottom of the valve body, which is positioned below the upper cover is communicated with an air intake joint which is arranged on the valve body; a valve sleeve central through hole is vertically formed in the center of the valve sleeve; an annular sealing ring is pressed between the bottom of the valve sleeve and the upper cover; the annular sealing ring is pressed against a connecting port of the valve sleeve central through hole and the air cavity at the bottom of the valve body; a ventilation guide groove which is communicated with the valve sleeve central through hole in a crossed mode is also formed on the valve sleeve; the ventilation guide groove is communicated with an air discharge joint; and a ventilation hole which is communicated with the ventilation guide groove and the air pressure regulating cavity is also formed in the upper cover. The balanced type depressurizing valve has the characteristics that: the pressure can be accurately regulated, and air is delivered steadily.

Description

A kind of balanced type reduction valve

Technical field

This novel air valve device technical field that relates to is refered in particular to a kind of balanced type reduction valve that can accurately regulate pressure.

Background technique

At present, existing air valve structure is fairly simple, and it realizes the break-make of air-flow through moving up and down of spool.Because air inlet is generally pressurized gas; The gas of constant voltage need be exported in for example medical field in some specific occasions; Existing pressure valve often is difficult to accomplish and adjusts atmospheric pressure accurately; Therefore, how existing decompression air valve is improved, make it have autobalance and stably export the gas of constant pressure and become problem to be solved is arranged.

Summary of the invention

This novel purpose is exactly a kind of balanced type reduction valve that can accurately regulate pressure that provides to the deficiency of existing technology.

For achieving the above object; A kind of balanced type reduction valve that this is novel; Include the valve body with air cavity, the airtight lower cover that is arranged with on the air cavity top of valve body is at the airtight pressure-regulating device with modulated pressure and the effect of restriction spool stroke that is provided with of the upper shed of following valve; Have in the pressure-regulating device between diaphragm and the lower cover of elastic recovery and form the air pressure adjustment chamber, the set screw in the pressure-regulating device is fixedly connected with diaphragm and set screw be positioned at spool directly over; The airtight valve pocket that is arranged with in the cavity of lower cover, spool is inserted in the valve pocket central through bore through the activity of last seal ring tightness; Being positioned at the valve body bottom air cavity of lower cover below is communicated with air input joint on being located at valve body; The valve pocket central vertical offers the valve pocket central through bore, presses between the bottom of valve pocket and the lower cover to be provided with O-ring seal, and O-ring seal is pressed on the connecting port of valve pocket center hole and valve body bottom air cavity; Also offer on the valve pocket with the valve pocket central through bore and intersect the ventilation guide groove that communicates, this ventilation guide groove is communicated with air outlet adapter, also offers the ventilate vent in guide groove and air pressure adjustment chamber of connection covering down; Be positioned at valve body bottom air cavity in the bottom of spool; Be provided with the Returnning spring that makes spool have the trend of moving upward in the spool bottom; On spool, also be provided with envelope gas and block up the position, when on spool is under action of reset spring, moving, the lucky shutoff in the stifled position of envelope gas is on the vent openings at O-ring seal center.

In the U-groove bevel of said spool bottom through the airtight lower cover bottom that is slidingly located in of lower seal; Said Returnning spring is positioned at this U-groove bevel bottom; In spool, have the pressure regulation passage, the upper shed of pressure regulation passage is positioned at the valve pocket central through bore, and the under shed of pressure regulation passage is positioned at U-groove bevel.

Said pressure-regulating device includes screw press, antifriction sheet, loam cake, relief spring, diaphragm, diaphragm pad, set screw, nut; Loam cake is fixed on diaphragm through retaining screw upper shed place of lower cover; The upper surface of diaphragm is provided with the diaphragm pad, and the lug boss of set screw passes behind the center hole of diaphragm and diaphragm pad fastening with nut thread respectively; Spiral has screw press on the tapped hole at the top of loam cake, and the upper end of relief spring is supported on the antifriction sheet that is located at through the screw press below, and the lower end of relief spring is supported and is located on the diaphragm pad.

Said screw press below forms circular abrading-ball, and said antifriction sheet end face is provided with the antifriction groove that holds this circle abrading-ball.

Said diaphragm is processed by plastic material, forms on the said diaphragm to be beneficial to the arc-shaped protrusions of replying deformation.

Said lower cover is tightly connected through seal ring and valve seat.

After adopting said structure, this novel adjusting screw rod precision spin that utilizes is regulated to pressing down relief spring, and the elastic force of relief spring is acted on the diaphragm with elastic recovery; Make the set screw that is fixed together with diaphragm press down spool; Open vent openings and ventilate, because the air pressure in the air pressure adjustment chamber of connection valve pocket ventilation guide groove reacts on the bottom surface of diaphragm, therefore; Diaphragm is in the autobalance state under top relief spring pressure and bottom high pressure air effect; Like this, just can control the decrement of relief spring and come accurately to control the force value of output gas, and can guarantee dynamically output reposefully.Hence one can see that, and this is novel to have and can accurately regulate pressure, gas transmission characteristics stably, is adapted at using in the products such as medical apparatus respiratory machine of related occasion.

Description of drawings

Fig. 1 is this novel solid decomposing schematic representation.

Fig. 2 is the three-dimensional cross-sectional view under this novel aeration status.

Fig. 3 is the plane cross-sectional view under this novel aeration status.

Fig. 4 is the three-dimensional cross-sectional view under this novel stuffiness state.

Fig. 5 is the plane cross-sectional view under this novel stuffiness state.

Fig. 6 is this novel solid structural representation.

Embodiment

Show like Fig. 1-6; A kind of balanced type reduction valve that this is novel; Include the valve body 1 with air cavity, the airtight lower cover 2 that is arranged with on the air cavity top of valve body 1 is at the airtight pressure-regulating device with modulated pressure and the 3 stroke effects of restriction spool that is provided with of the upper shed of following valve 2; Have in the pressure-regulating device between diaphragm 4 and the lower cover 2 of elastic recovery and form air pressure adjustment chamber 5, the set screw 6 in the pressure-regulating device is fixedly connected with diaphragm 4 and set screw 6 be positioned at spool 3 directly over; The airtight valve pocket 7 that is arranged with in the cavity of lower cover 2, spool 3 is inserted in the valve pocket central through bore 7a through last seal ring 8 tightness activities; Being positioned at the valve body bottom air cavity 9 of lower cover 2 belows is communicated with air input joint 10 on being located at valve body 1; Valve pocket 7 central vertical offer valve pocket central through bore 7a, press between the bottom of valve pocket 7 and the lower cover 2 to be provided with O-ring seal 11, and O-ring seal 11 is pressed on the connecting port of valve pocket center hole 7a and valve body bottom air cavity 9; Also offer on the valve pocket 7 with valve pocket central through bore 7a and intersect the ventilation guide groove 7b that communicates, this ventilation guide groove 7b is communicated with air outlet adapter 12, on lower cover 2, also offers the ventilate vent 2a in guide groove 7b and air pressure adjustment chamber 5 of connection; Be positioned at valve body bottom air cavity 9 in the bottom of spool 3; Be provided with the Returnning spring 13 that makes spool 3 have the trend of moving upward in spool 3 bottoms; On spool 3, also be provided with envelope gas stifled position 3a; When on spool 3 is under Returnning spring 13 effects, moving, the lucky shutoff of envelope gas stifled position 3a is on the vent openings 11a at O-ring seal 11 centers.

In the U-groove bevel 2b of said spool 3 bottoms through lower seal 14 airtight lower cover 2 bottoms that are slidingly located in; Said Returnning spring 13 is positioned at this U-groove bevel 2b bottom; In spool 3, have pressure regulation passage 3b; The upper shed of pressure regulation passage 3b is positioned at valve pocket central through bore 7a, and the under shed of pressure regulation passage 3b is positioned at U-groove bevel 2b.

Said pressure-regulating device includes screw press 15, antifriction sheet 16, loam cake 17, relief spring 18, diaphragm 4, diaphragm pad 19, set screw 6, nut 20; Loam cake 17 is fixed on diaphragm 4 through retaining screw upper shed place of lower cover 2; The upper surface of diaphragm 4 is provided with diaphragm pad 19, and the lug boss of set screw 6 passes respectively behind the center hole of diaphragm 4 and diaphragm pad 19 and nut 20 screw threads for fastening; Spiral has screw press 15 on the tapped hole at the top of loam cake 17, and the upper end of relief spring 18 is supported and is located on the antifriction sheet 16 through screw press 15 belows, and the lower end of relief spring 18 is supported and is located on the diaphragm pad 19.

Said screw press 15 belows form circular abrading-ball, and said antifriction sheet 16 end faces are provided with the antifriction groove that holds this circle abrading-ball.

Said diaphragm 4 is processed by plastic material, forms on the said diaphragm 4 and is beneficial to the arc-shaped protrusions of replying deformation.

Said lower cover 2 is tightly connected through seal ring and valve seat 1.

During use; When stuffiness; The top of spool 3 and set screw 6 bottoms have the space; Spool 3 13 effects of the Returnning spring of bottom move upward down make spool 3 the lucky shutoff of envelope gas stifled position 3a on the vent openings 11a at O-ring seal 11 centers, like this, air input joint 10 get into valve bodies bottom air cavity 9 inner high voltage gases can't center hole 7a through vent openings 11a entering valve pocket 7 in;

When ventilation decompression, calculate the downward stroke distances of screw press 15, promptly act on the elasticity coefficient that force value on the diaphragm 4 deducts behind the elastic force of Returnning spring 13 divided by relief spring 18 again and draw with needed output gas pressure intensity; Then; Screw is regulated screw press 15 down to the stroke distances that calculates, and the bottom of screw press 15 presses down relief spring 18 through anti-attrition sheet 16, and relief spring is pressed in for 18 times on the diaphragm pad 19; Make the diaphragm 4 downward deformation of diaphragm pad 19 belows; The set screw that is fixed on diaphragm 4 centers is pressed in the top of spool 3 for 6 times, and the elastic force that makes spool 3 overcome Returnning spring 13 moves down, and envelope gas stifled position 3a leaves the vent openings 11a at O-ring seal 11 centers; Like this; Air input joint 10 gets into valve bodies bottom air cavity 9 inner high voltage gases and gets into through vent openings 11a in the center hole 7a of valve pocket 7, and leading up to of pressurized gas derived by air outlet adapter 12 behind the ventilation guide groove 7b of center hole 7a, valve pocket 7 of valve pocket 7, and another road of pressurized gas arrives air pressure adjustment chamber 5 through center hole 7a, the ventilation guide groove 7b of valve pocket 7, the vent 2a of valve pocket 7; High pressure air in the air pressure adjustment chamber 5 reacts on the bottom surface of diaphragm 4; Therefore, diaphragm 4 is in the autobalance state under top relief spring 18 pressure and bottom high pressure air effect, guarantees that the force value of output gas is constant.

In the process of gas output; Because the bottom of spool 3 is to be positioned at airtight U-groove bevel 2b's; And U-groove bevel 2b communicating through the pressure regulation passage 3b in the spool 3 and air pressure adjustment chamber 5; Make spool 3 be in the air pressure balance state, such structure helps the accurate Calculation atmospheric pressure value, makes spool 3 can not receive the different influence that brings of gas pressure up and down.

By on can know that this is novel to have and can accurately regulate pressure, gas transmission characteristics stably, be adapted at using in the products such as medical apparatus respiratory machine of related occasion.

Claims

1. balanced type reduction valve; It is characterized in that: include valve body with air cavity; The airtight lower cover that is arranged with on the air cavity top of valve body; At the following airtight pressure-regulating device that is provided with of upper shed of valve with modulated pressure and the effect of restriction spool stroke, have in the pressure-regulating device between diaphragm and the lower cover of elastic recovery and form the air pressure adjustment chamber, the set screw in the pressure-regulating device is fixedly connected with diaphragm and set screw be positioned at spool directly over; The airtight valve pocket that is arranged with in the cavity of lower cover, spool is inserted in the valve pocket central through bore through the activity of last seal ring tightness; Being positioned at the valve body bottom air cavity of lower cover below is communicated with air input joint on being located at valve body; The valve pocket central vertical offers the valve pocket central through bore, presses between the bottom of valve pocket and the lower cover to be provided with O-ring seal, and O-ring seal is pressed on the connecting port of valve pocket center hole and valve body bottom air cavity; Also offer on the valve pocket with the valve pocket central through bore and intersect the ventilation guide groove that communicates, this ventilation guide groove is communicated with air outlet adapter, also offers the ventilate vent in guide groove and air pressure adjustment chamber of connection covering down; Be positioned at valve body bottom air cavity in the bottom of spool; Be provided with the Returnning spring that makes spool have the trend of moving upward in the spool bottom; On spool, also be provided with envelope gas and block up the position, when on spool is under action of reset spring, moving, the lucky shutoff in the stifled position of envelope gas is on the vent openings at O-ring seal center.

2. a kind of balanced type reduction valve according to claim 1; It is characterized in that: in the U-groove bevel of said spool bottom through the airtight lower cover bottom that is slidingly located in of lower seal; Said Returnning spring is positioned at this U-groove bevel bottom; In spool, have the pressure regulation passage, the upper shed of pressure regulation passage is positioned at the valve pocket central through bore, and the under shed of pressure regulation passage is positioned at U-groove bevel.

3. a kind of balanced type reduction valve according to claim 1 and 2; It is characterized in that: said pressure-regulating device includes screw press, antifriction sheet, loam cake, relief spring, diaphragm, diaphragm pad, set screw, nut; Loam cake is fixed on diaphragm through retaining screw upper shed place of lower cover; The upper surface of diaphragm is provided with the diaphragm pad, and the lug boss of set screw passes behind the center hole of diaphragm and diaphragm pad fastening with nut thread respectively; Spiral has screw press on the tapped hole at the top of loam cake, and the upper end of relief spring is supported on the antifriction sheet that is located at through the screw press below, and the lower end of relief spring is supported and is located on the diaphragm pad.

4. a kind of balanced type reduction valve according to claim 3 is characterized in that: said screw press below forms circular abrading-ball, and said antifriction sheet end face is provided with the antifriction groove that holds this circle abrading-ball.

5. a kind of balanced type reduction valve according to claim 3, it is characterized in that: said diaphragm is processed by plastic material, forms on the said diaphragm to be beneficial to the arc-shaped protrusions of replying deformation.

6. a kind of balanced type reduction valve according to claim 1 and 2, it is characterized in that: said lower cover is tightly connected through seal ring and valve seat.