CN2784699Y

CN2784699Y - Pressure stable throttle valve

Info

Publication number: CN2784699Y
Application number: CN 200520089831
Authority: CN
Inventors: 黄克敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-24
Filing date: 2005-03-24
Publication date: 2006-05-31
Anticipated expiration: 2015-03-24

Abstract

The utility model discloses a pressure stable throttle valve which has the advantages of simple structure, small size, easy adjustment, simple manufacturing technique, stable air flow, no high requirement for an air source pressure state, etc. The utility model comprises a slide valve and a throttle valve, and an air inlet and an air outlet are arranged on a valve casing. The slide valve which is provided with an air inlet throttle port is installed in the valve casing, and a nut which is provided with a pressure regulation screw bolt is fixed at one end of the valve casing. A pressure adjusting spring is installed between the slide valve and the pressure regulation screw bolt, and an overflow port is arranged on the valve casing. An air outlet throttle port is arranged in the valve casing, and a nut provided with a throttle valve lever is fixed at the other end of the valve casing. The utility model can be extensively used for devices which has high requirement for the stability of the air source pressure, and is especially suitable for the devices having the independent air source.

Description

The voltage stabilizing throttle valve

Technical field:

The utility model relates to valve technology field, and specifically, it is a kind of voltage stabilizing throttle valve.

Background technique:

In pneumatic element, throttle valve is the most frequently used a kind of pneumatic element, structural type is also numerous and complicated numerous, but wherein most throttle valve all are the sizes by restriction in the modulating valve realizes flow control, as going out ability of swimming throttle valve, 200320130843.0 disclosed manual magnetic throttle valve etc. in the Chinese patent 03249878.0 disclosed rotating shaft hollow.This class throttle valve exists the most not enoughly is exactly: under the stream pressure unsure state, flow with stream pressure and big minor swing, thereby, can't satisfy the requirement of system to stability of flow, equilibrium.At present, in much with the mini-plant of independent source of the gas, all there is this problem.For addressing this problem, people have taked a lot of measures on the structural design of throttle valve, as Chinese patent 85202913 disclosed a kind of leading type overflow throttle valves, it is to utilize a relief valve to do the guide to control relief valve and pilot valve is arranged apart, pilot valve control relief valve spool, pressure reduction before and after the throttle valve detects by the spring force on the pilot valve and makes it to keep constant, thereby the control flow rate of keeping throttle valve is constant substantially.Though this design has solved the problem that throttle flow rate fluctuates with the size of stream pressure, overall structure is relatively large, and the composition of its component and mutual bridging mode be also simple and direct inadequately.

Summary of the invention:

The utility model is the technological improvement to existing throttle valve, its purpose just provide a kind of simple in structure, volume is little, be convenient to install and regulate, can be under the stream pressure unstable state voltage stabilizing throttle valve of output flow steady air flow.

The purpose of this utility model is to realize like this, the voltage stabilizing throttle valve comprises guiding valve and throttle valve, valve casing (2) is provided with suction port (5) and air outlet (7), it is characterized in that: the guiding valve (14) that is provided with air inlet restriction mouth (4) is installed in the valve casing (2), the nut (17) that regulator bolts (19) are housed is fixed on an end of valve casing (2), pressure adjusting spring (15) is installed between guiding valve (14) and the regulator bolts (19), seal ring (3) and (13) are housed on the guiding valve (14), valve casing (2) is provided with flow-off (1), locknut (18) is housed on the regulator bolts (19), be provided with the restriction of giving vent to anger (6) in the valve casing (2), the nut (8) that throttle valve lever (9) are housed is fixed on the other end of valve casing (2), and seal ring (11) and locknut (10) are housed on the throttle valve lever (9).

Compared with prior art, the utility model combines guiding valve and throttle valve, have simple in structure, volume is little, easy to adjust, manufacturing process simple, steady air current, to advantages such as the bleed pressure state are less demanding; During use, do not need before the voltage stabilizing throttle valve to add pressure regulator valve in addition, relative cost is low, and it is little to take up room.

Description of drawings:

Fig. 1 is an overall structure schematic representation of the present utility model.

Embodiment:

Embodiment 1:

Below in conjunction with accompanying drawing, the utility model is further described.As shown in Figure 1, the valve casing in the utility model 2, guiding valve 14, regulator bolts 19, nut 17, throttle valve lever 9 and nut 8 all can adopt metallic material to obtain through machining;

Seal ring

3,11 and 13, pressure adjusting spring 15, locknut 10 and 18 and packing ring 16 can use standard piece.When flow-off 1 position on valve casing 2 should guarantee that guiding valve 14 slides left not with its sealing; Nut 17 and 8 is packed into behind the valve casing 2, uses screw or key both are fixed together; Throttle valve lever 9 should be concentric with the restriction 6 of giving vent to anger, with the stability that guarantees that air-flow is adjusted; Seal ring 3 can adopt y-type seal ring, and 11 and 13 can adopt the O RunddichtringO; Packing ring 16 is to be provided with for the stability that increases pressure adjusting spring 15.12 is air chamber.

When installing and using, suction port 5 links to each other with supply air line, air outlet 7 outlet pipes link to each other.As shown in drawings, pressurized air enters from suction port 5, and in air inlet restriction mouth 4 entered air chamber 12, through the adjustment passage of the formation between restriction 6 and the throttle valve lever 9 of giving vent to anger, 7 got rid of from the air outlet again; Utilize throttle valve lever 9 can adjust the size of entraining air stream, adjust the back and throttle valve lever 9 is locked with locknut 10.When the air pressure in supply pressure fluctation, the air chamber 12 reaches certain value, act on the elastic force that pressure on the guiding valve 14 overcomes pressure adjusting spring 15, promote guiding valve 14 and be moved to the left, the air in guiding valve 14 left chambeies is discharged from flow-off 1; At this moment air inlet restriction mouth 4 staggers mutually with the position of suction port 5, the sectional area of air inlet restriction mouth 4 diminishes gradually, air inflow also reduces thereupon, during when the pressure balance of air chamber 12 internal pressures and setting, promptly with the Spring balanced of pressure adjusting spring 15, guiding valve 14 stops to move, and makes air chamber 12 internal pressures keep stable.Force value in the air chamber 12 relies on regulator bolts 19 to set, and spring 15 is compressed tight more, and the pressure set points in the air chamber 12 is just high more; With locknut 18 regulator bolts 19 is locked after the pressure adjustment.In the working procedure, guiding valve 14 will horizontally slip along with the fluctuation of source of the gas air pressure, thereby guarantee the stable of air pressure of giving vent to anger.

Claims

1, voltage stabilizing throttle valve, it comprises guiding valve and throttle valve, valve casing (2) is provided with suction port (5) and air outlet (7), it is characterized in that: the guiding valve (14) that is provided with air inlet restriction mouth (4) is installed in the valve casing (2), the nut (17) that regulator bolts (19) are housed is fixed on an end of valve casing (2), pressure adjusting spring (15) is installed between guiding valve (14) and the regulator bolts (19), be provided with the restriction of giving vent to anger (6) in the valve casing (2), the nut (8) that throttle valve lever (9) are housed is fixed on the other end of valve casing (2).

2, according to asking profit to require 1 described a kind of voltage stabilizing throttle valve, it is characterized in that: valve casing (2) is provided with flow-off (1).

3, according to asking profit to require 1 described a kind of voltage stabilizing throttle valve, it is characterized in that: seal ring (3) and (13) are housed on the guiding valve (14).

4, according to asking profit to require 1 described a kind of voltage stabilizing throttle valve, it is characterized in that: locknut (18) is housed on the regulator bolts (19).

5, according to asking profit to require 1 described a kind of voltage stabilizing throttle valve, it is characterized in that: seal ring (11) and locknut (10) are housed on the throttle valve lever (9).