JPS5830963Y2 - Regulator remote control device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a remote control device for a regulator that arbitrarily varies the pressure for a multi-type welding machine or the like.

In conventional devices of this kind, when the flow rate increases due to the generation of secondary pressure by an electrical signal, a large pressure drop occurs, and it takes time to compensate for this, which means that the response time is slow and the speed is slow. The drawback was that it made remote control difficult.

The purpose of this invention is to provide a regulator remote control device that improves the pressure drop when secondary pressure is generated using an electric signal by applying feedback, thereby shortening the response time and enabling quick operation.

To explain the embodiment below with reference to the drawings, a primary port 1a and a secondary port 1b are provided at opposing positions, and a valve body and a stem assembly 19 are accommodated in a valve seat position that communicates with each other with elastic support so as to be vertically movable. A lower body 2 that supports the spring of the valve body and a strainer and is provided with a passage 2a that communicates with the primary port 1a via the strainer is attached concentrically to the lower part of the arranged main body 1.

At the bottom of the lower body 2, a bottom body 3 is provided with a passage 3a that communicates with the aforementioned passage 2a and opens to the outside at the end, and is integrally assembled by tightening bolts. A stem assembly with a branch valve is housed in a horizontal position, and a miniature regulator 20 is attached to the outside of the stem assembly via a diaphragm for adjusting the opening degree of the port 3a with a knob of the branch valve.

Next, in the upper part of the main body 1, an opening is provided on the other side, and an intermediate body 6 is placed in which diaphragms 7.8 of the same shape are mounted facing each other in the upper and lower positions, and above the intermediate body 6, an opening is provided in one of the openings. A fixed orifice 14 and a variable orifice 1 in the other opening.
5, and a series of chambers A are provided by screwing a housing having a nozzle 13 at the tip into the interior communicating with both openings, and an upper part with a communication port 4a between this chamber A and the bottom. The body 4 is placed and fixed.

As a result, there is a passage 4a between the upper body 4 and the diaphragm 1.
A chamber B is formed which communicates with the nozzle 13 via the nozzle 13 .

Further, on the upper body 4, there is a lid body 5 which houses a moving coil type force motor M, which has a magnet N having both magnetic poles installed therein, and a coil 11 arranged between the magnetic poles so as to be freely movable. A diaphragm 9 integrated with a feedback rod 10 is placed on top of the diaphragm 9 so that the rod 10 can be operated by penetrating the core of the force motor M, and springs 21 and 22 are attached to the upper and lower surfaces. death,
Separate upper and lower chambers C and D are formed by attaching the lid plate 5a to both sides from above to balance the elasticity.

In this case, a flapper 12 equipped with a leaf spring is attached to the lower end of the rod 10 so that when the coil 11 is lowered, the center surface of the main central part can be elastically lowered.

As shown in FIG.
The other opening of the main body 1 and the opening of the lid plate 5a are connected by a communication pipe 17, and the other opening of the main body 1 and the opening of the lid body 5 are connected by a communication pipe 18, thereby forming a regulator remote control device as a whole. Configure.

To explain the operation of this device with the above configuration, in parallel with feeding pressurized air for a welding machine etc. from the primary port 1a to the secondary port 1b side, a part of the lower body 2 is fed as shown by the solid line. Flows into the port 3a of the bottom body 3 from the port 2a of the miniature regulator 20, the communication pipe 16, and the fixed orifice 1.
4. It is discharged to the outside from the nozzle 13 through the chamber A.

Next, when a predetermined current value is applied to the force motor M by remote control, the coil 11 located between the magnetic poles moves downward, and then the central main surface of the flapper 12 also elastically moves downward and approaches the nozzle 13. Therefore, the back pressure in chamber A increases.

As a result, when the primary pressure P1 changes, the internal pressure Ps just before the fixed orifice 14 and the nozzle back pressure Pc will receive the fluctuation width of the primary pressure P1. Therefore, it does not have a large effect and can be received as pressure on the set value.

When the nozzle back pressure Pc is generated due to the above, the pressure becomes
As shown by the dashed line in the figure, it is fed into the chamber B above the diaphragm I through the port 4a.

Therefore, the diaphragm 7.8 moves down integrally and pushes the stem assembly 19 downward, so the secondary pressure P2
occurs, and the flow rate fed to the welding machine can be increased.

In this case, a large pressure drop occurs due to the increase in flow rate, but a portion of the nozzle back pressure Pc due to the above is transferred from chamber B to upper chamber C via communication pipe 17, as shown by the dashed line in FIG. As the diaphragm 9 is introduced, the diaphragm 9 moves downward, and the feedback rod 10 integrated with it is also pushed down in the same direction.As a result, the nozzle back pressure Pc is further accumulated, and the stem assembly 19 is rapidly moved through the diaphragm 7°8. By increasing the opening degree, it is possible to compensate for the pressure drop within a short period of time.

The compensating action for this pressure drop is achieved by lowering the diaphragm 9 by the amount of difference between the nozzle back pressure Pc for the upper chamber C and the secondary pressure P2 for the lower chamber, and the flapper 12 is lowered in conjunction. Since the above-described cooperative operation leading to the rapid opening of the stem assembly 19 continues at 1 where the pressures in both chambers C and D are equalized, the pressure drop on the secondary side due to the increase in flow rate is quickly corrected and the initial setting is made. Pressure can be easily restored.

Note that by arranging the variable orifice 15 at a position facing the fixed orifice 14, the set value of the nozzle back pressure Pc for a predetermined current value of the force motor M can be easily varied by the spiral of the orifice 15, and the pressure characteristics can also be changed. A proportional ratio can be made to the current value.

Further, when the secondary pressure P2 becomes lower than the nozzle back pressure Pc, the diaphragm 8 is pushed up from the relief pipe 1c side of the main body 1 and discharged to the outside from the opening of the intermediate body 6.

As shown above, this invention is designed to supply pressurized air for special pressure regulating operations to the nozzle 13 and each chamber A, B, C, and D in parallel with the supply of pressurized air to a welding machine or other equipment. According to
The pressure drop caused by the increase in flow rate when secondary pressure is generated is transferred to the pressure difference between the upper and lower chambers C and D, and this is rapidly compensated for by interlocking feedback, resulting in a faster response time. Not only can remote control be performed quickly and reliably, but also the installation of the miniature regulator 20 has the effect of maintaining the flow rate characteristics of the secondary side pressure close to the set value.

[Brief explanation of drawings]

Fig. 1 is a plan view of a regulator equipped with a remote control device according to this invention, Fig. 2 is a longitudinal sectional view showing the configuration and operation of the main parts of the device taken along line E-E in Fig. −
FIG. 4 is a vertical sectional view showing the configuration and operation taken along line F, and FIG. 4 is a vertical sectional view showing the configuration and operation taken along line GG. Explanation of symbols, 1...Main body, 1a...1
Secondary port, 1b...Secondary port, 1c...Relief pipe, 2...Lower body, 2a, 3a, 4a
......Port, 3...Bottom body, 4...
... Upper body, 5... Lid body, 5a...
Lid plate, 6... Intermediate, I, 8, 9...
・Diaphragm, 10... Feedback rod, 11... Coil, 12... Flapper, 13... Nozzle, 14... Fixed orifice, 15...Variable orifice, 16.1
7゜18...Communication pipe, 19...Stem assembly, 20...Miniature regulator, 21, 22...Spring, A, B, C,
D... Chamber, M... Force motor, N
...Magnet, Pl...Primary pressure, P2...
...Secondary pressure, Pc...Nozzle back pressure, Ps.
...Internal pressure.

Claims (2)

[Scope of utility model registration request] (1) Primary port 1a where primary pressure P1 is supplied and secondary pressure P2
The internal pressure PsO flow path branched from the primary port 1a is connected to the chamber via the fixed orifice 14. A, the chamber A is opened to the atmosphere through a nozzle 13, and a flapper 12, which is suppressed by a force motor M and is displaced according to the current applied to the force motor, is connected to the nozzle 13.
is arranged close to the opening side of the chamber A to vary the nozzle back pressure Pc of the chamber A, and one chamber B divided by the opposing diaphragm 7.8 is communicated with the chamber A to adjust the nozzle back pressure Pc.
is applied to the diaphragm 7, and the other chamber is communicated with the secondary port 1b to apply the secondary pressure P2 to the diaphragm 8, and the stem assembly 19 is connected to a discharge valve provided at the center of the diaphragm 8. In the regulator remote control device, the stem assembly is raised and lowered in contact with the stem assembly to obtain a secondary pressure P2 proportional to the current flowing to the force motor M. The other ends of the feedback rods are connected on both sides to diaphragms 9 supported by springs 21 and 22, respectively, and form a chamber C and a chamber chamber separated by the diaphragms, and the chamber C is connected to the chamber C. A nozzle back pressure Po is applied to one side of the diaphragm 9 so as to communicate with B and act in a direction to pull down the feedback rod 10, and the chamber is communicated with the secondary port 1b side to pull up the feedback rod 10. The secondary pressure P2 is applied to the diaphragm 9 to act in the direction
In addition to the other pressure, the opening amount of the nozzle 13 is controlled by a differential pressure between a nozzle back pressure Pc applied to the chamber CK and a secondary pressure P2 applied to the chamber. (2) A pressure reducing valve type miniature regulator 20 for setting the internal pressure Ps is installed in the flow path branching from the primary port 1a side and reaching the fixed orifice 14. regulator remote control device.