CN212377306U

CN212377306U - Direct action type voltage regulator for compensating spring effect

Info

Publication number: CN212377306U
Application number: CN202020943731.0U
Authority: CN
Inventors: 吴伟功; 蒋东杰; 齐旭
Original assignee: Inner Mongolia Xinguangjin Gas Equipment Co ltd
Current assignee: Inner Mongolia Xinguangjin Gas Equipment Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-19
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to a direct action formula voltage regulator of compensation spring effect, including the main valve body and drive assembly, the main valve body is installed at the drive assembly lower extreme, and the internal disk seat, valve clack, valve rod cover and the balanced diaphragm of being equipped with of main valve, drive assembly include the upper membrane shell and lower membrane shell, diaphragm and tray. Wherein, the tray periphery wall constitutes the annular installation cavity of cross-section for "eight" font with last membrane shell lower half internal perisporium, and the diaphragm upwards forms the annular arch that the cross-section is omega shape in annular installation cavity, is connected with the signal pipe on the membrane shell down, and the signal pipe is used for the pipeline intercommunication of being connected with main valve body exit end. The utility model transforms the traditional direct-acting pressure regulator, when the diaphragm and the tray move from bottom to top after being stressed, the effective area of the diaphragm is gradually increased; when the diaphragm and the tray move from top to bottom after being stressed, the effective area of the diaphragm is gradually reduced, the spring effect of the voltage regulator can be effectively compensated, and the voltage regulator can achieve high voltage stabilization precision.

Description

Direct action type voltage regulator for compensating spring effect

Technical Field

The utility model relates to a gaseous pressure regulating device field, concretely relates to direct action formula voltage regulator of compensating spring effect.

Background

The pressure regulator is a special valve on the pipeline, and automatically regulates the outlet pressure to make it stable in a certain pressure range. The pressure regulator is divided into a direct-acting pressure regulator and an indirect-acting pressure regulator, wherein the direct-acting pressure regulator adopts the working principle that the driving assembly is directly controlled to drive the adjusting element to move by utilizing the pressure change at the outlet of the pressure regulator. The main element of the driving assembly is a diaphragm, a pressure regulating spring is arranged in the pressure regulator, and when the pressure regulating assembly works, the pressure regulating spring changes the compression amount along with the opening degree of the valve clack, so that the spring force changes along with the opening degree of the valve clack, the change influences the pressure stabilizing precision, and the change of the spring force changes the outlet pressure P of the pressure regulator₂The effect of (c) is called "spring effect".

A high quality regulator needs to reduce the spring effect as much as possible, and the methods for reducing the spring effect in the prior art are roughly as follows: 1. the spring stiffness of the pressure regulating spring is reduced, the method can properly reduce the spring effect, but the regulating range of the spring is reduced; 2. the main diaphragm adopts a rolling diaphragm technology, but the effect is not great; 3. the method of built-in signal tube, also called the method of getting the negative pressure, the port of the signal tube must be placed in the pressure field in the outlet cavity of the pressure regulator, the pressure is lower position, this pressure must be smaller than the actual pressure of the outlet, the feedback pressure under the main diaphragm becomes small, make the diaphragm move downward, the opening degree of the valve flap becomes large, make the outlet pressure of the pressure regulator become large, in order to achieve the goal of compensating the spring effect, but the outlet cavity pressure field inside the valve block is more complicated and disorderly, therefore it is difficult to find the appropriate position in the port of the signal tube, if the installation position of the signal tube is improper, can't play the role of compensating the spring effect, therefore need to do a large amount of experiments, even change the structure of the valve block and can get the.

SUMMERY OF THE UTILITY MODEL

The utility model discloses from the angle that changes the effective lifting surface area of diaphragm, effectively compensate to the regulator spring effect, improve the steady voltage precision of voltage regulator.

In order to solve the above problems in the prior art, the present invention provides a direct acting pressure regulator with compensation spring effect, which comprises a main valve body and a driving assembly, wherein the main valve body is installed at the lower end of the driving assembly, a valve seat, a valve clack, a valve rod sleeve and a balance diaphragm are assembled in the main valve body, the valve rod sleeve is fixed at the upper end of the main valve body, the valve rod is arranged in the valve rod sleeve, the valve clack is fixed at the lower end of the valve rod, the valve clack is positioned at the lower side of the valve seat, the balance diaphragm is installed at the upper side of the valve rod sleeve, the driving assembly comprises an upper diaphragm casing, a lower diaphragm casing, a diaphragm and a tray, the diaphragm is fixed between the upper diaphragm casing and the lower diaphragm casing, the tray is arranged on the main valve body, the upper end of the valve rod passes through the valve seat, the valve rod sleeve, the balance diaphragm, the, the pressure regulating spring is located the cavity of epitheca shell, the pressure regulating spring upper end is fixed with the spring holder, the adjusting bolt is equipped with to the epitheca shell epiboly, the adjusting bolt lower extreme passes the epitheca top on the spring holder, the annular installation cavity of cross-section for falling "eight" font is constituteed with the interior perisporium of epitheca shell lower half to the tray periphery wall, the diaphragm upwards forms the annular arch that the cross-section is omega shape in annular installation cavity, be connected with the signal pipe down on the epitheca shell, the signal pipe is used for the pipeline intercommunication of being connected with main valve body exit end.

Further, the utility model relates to a direct action formula voltage regulator of compensation spring effect, wherein, the tray is big end down's outer cone, and the bottom surface of tray passes through circular arc smooth transition rather than the lateral wall.

Further, the utility model relates to a direct action formula voltage regulator of compensation spring effect, wherein, go up membrane shell lower half inner chamber and be big-end-up's interior cone cavity, go up the bottom surface of membrane shell and pass through circular arc smooth transition rather than the lower half inside wall.

Further, the utility model relates to a direct action formula voltage regulator of compensation spring effect, wherein, the generating line of tray lateral wall is 15 ~ 45 with the contained angle of axis.

Further, the utility model relates to a direct action formula voltage regulator of compensation spring effect, wherein, go up the generating line in membrane shell 21 inner cone chamber and the contained angle of axis and the generating line of tray 24 lateral wall is the same with the contained angle of axis.

The utility model relates to a direct action formula voltage regulator of compensation spring effect compares with prior art, has following advantage: the setting of signal pipe pressure port is external at the main valve body, signal pipe one end and lower diaphragm casing intercommunication, the pipeline intercommunication of the other end and the main valve body exit end connection, provide feedback pressure for the diaphragm, the annular installation cavity of "eight" font is down constituteed to tray periphery wall and last diaphragm casing lower half internal perisporium, the diaphragm upwards forms the annular arch that the cross-section is omega shape in annular installation cavity, diaphragm annular bulge and tray lateral wall rolling contact, when the diaphragm upwards displacement, the spring force increase, the diaphragm effective area also can increase, on the same way, when the diaphragm downward displacement, the pressure regulating spring becomes lax, the spring force descends, the diaphragm effective area also can descend. In conclusion, the effective area of the diaphragm and the spring force are changed in the same direction and are changed along with the change of the spring force, so that the opening degree of the valve seat is slightly influenced, and the pressure regulator achieves high pressure stabilizing precision.

A direct acting regulator for compensating spring effects according to the present invention will be described in further detail with reference to the embodiments shown in the drawings.

Drawings

Fig. 1 is a schematic diagram of a voltage regulator in the prior art;

FIG. 2 is a schematic diagram of a direct acting regulator that compensates for the spring effect;

FIG. 3 is a schematic view of the equivalent structure of the valve seat and the valve flap of the present invention in a state of small opening;

fig. 4 is the equivalent structure schematic diagram of the valve seat and the valve clack in the larger state of the valve seat and the valve clack.

Detailed Description

As shown in fig. 1, a voltage regulator structure in the prior art includes: the main valve body 1 is arranged at the lower end of the driving component 2, a valve seat 11, a valve clack 12, a valve rod 13, a valve rod sleeve 14 and a balance diaphragm 15 are assembled in the main valve body 1, the valve rod sleeve 14 is fixed at the upper end of the main valve body 1, the valve rod 13 is arranged in the valve rod sleeve 14, the valve clack 12 is fixed at the lower end of the valve rod 13, the valve clack 12 is positioned at the lower side of the valve seat 11, the balance diaphragm 15 is arranged at the upper side of the valve rod sleeve 14, the balance diaphragm 15 is arranged for improving unbalanced force of the valve core, and the pressure of an outlet can be improved by improving the pressure stabilizing precision without being influenced by the change of the. The driving assembly 2 comprises an upper membrane shell 21, a lower membrane shell 22, a membrane 23 and a tray 24, the membrane 23 is fixed between the upper membrane shell 21 and the lower membrane shell 22, the tray 24 is arranged on the membrane 23, the lower membrane shell 22 is fixed at the upper end of the main valve body 1, the upper end of the valve rod 13 penetrates through the valve seat 11 from bottom to top, the valve rod sleeve 14, the balance membrane 15, the lower membrane shell 22 and the membrane 23 are fixedly connected onto the tray 24, a pressure regulating spring 25 is installed at the upper end of the tray 24, the pressure regulating spring 25 is located in a cavity of the upper membrane shell 21, a spring seat 26 is fixed at the upper end of the pressure regulating spring 25, an adjusting bolt 27 is screwed onto the upper membrane shell 21, the lower end of the adjusting bolt 27 penetrates through the upper membrane shell 21 to abut against the spring seat 26, the force of the pressure regulating spring 25 is.

According to the voltage regulation equation of the direct-acting voltage regulator, see formula 1.

Wherein: p₂-a pressure regulator outlet pressure,

f-the spring force of the pressure regulating spring,

a-the effective area of the membrane.

In the prior art, when the diaphragm 23 moves upwards, the tray 24 will press the pressure regulating spring 25 to increase the spring force F, and after the spring force F is increased, if the effective area a of the diaphragm 23 is not changed, the outlet pressure P of the pressure regulator will be increased according to the formula 1₂Will rise accordingly, so that the regulator outlet pressure P will rise₂The stability is lost. Similarly, when the diaphragm 23 moves downwards, the pressure regulating spring 25 becomes loose, the spring force F decreases, and if the effective area A of the diaphragm is not changed, the outlet pressure P of the pressure regulator₂Will be reduced and will also cause the pressure regulator outlet pressure P to decrease₂Losing stability. The above phenomenon is called: a spring effect.

As shown in fig. 2, the utility model relates to a direct action formula voltage regulator's of compensation spring effect concrete implementation mode, the annular installation cavity of cross-section for falling "eight" font is constituteed with the interior perisporium of upper diaphragm shell 21 lower half to the tray 24 periphery wall, and diaphragm 23 upwards forms the annular arch that the cross-section is omega shape in annular installation cavity, is connected with signal pipe 3 on the lower diaphragm shell 22, and signal pipe 3 is used for the pipeline intercommunication of being connected with main valve body 1 exit end.

Specifically, the tray 24 is an outer cone with a small top and a large bottom, an arc is arranged between the bottom surface of the tray 24 and the outer side wall of the tray for smooth transition, the inner cavity of the lower half portion of the upper membrane shell 21 is an inner cone cavity with a large top and a small bottom, and an arc is arranged between the bottom surface of the upper membrane shell 21 and the inner side wall of the lower half portion of the upper membrane shell for smooth transition. According to the change of the rigidity of the pressure regulating spring 25, the included angle alpha between the generatrix of the outer side wall of the tray 24 and the axis is selected from 15 degrees to 45 degrees. The included angle beta between the generatrix of the inner conical cavity of the upper membrane shell 21 and the axis is set to be the same as the included angle alpha, so that the annular convex part of the membrane 23 is ensured to form effective rolling contact between the outer side wall inclined surface of the tray 24 and the inner conical cavity inclined surface of the lower membrane shell 22.

In actual use, as shown in fig. 3 and 4, fig. 3 is a position where the diaphragm 23 moves upward, and fig. 4 is a position where the diaphragm 23 moves downward. By comparison, d can be obtained₂＞d₁，D₂＞D₁The formula for calculating the effective area of the diaphragm 23 is

Suppose that the effective area of the diaphragm 23 when displaced upward is A₁Effective area of the diaphragm 23 when displaced downward is A₂. Then

A is obtained by comparison₁>A₂That is, it is proved that the effective area of the upward movement of the diaphragm 23 is increased and the effective area of the downward movement of the diaphragm 23 is decreased.

In summary, when the diaphragm 23 is displaced upward, the spring force F increases and the effective diaphragm area a also increases; similarly, when the diaphragm moves downward, the pressure regulating spring 25 relaxes, the spring force F decreases, and the effective area a of the diaphragm also decreases. That is, the effective area of the diaphragm 23 and the spring force are the same amount of change, and change along with the change of the spring force, so the opening degree of the valve seat 11 is slightly influenced, and the pressure regulator achieves high pressure stabilizing precision.

It should be noted that the membrane of the present invention is formed by compounding rubber and silk fabric, and the membrane made of other rubber is not excluded.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the present invention as defined by the claims.

Claims

1. The utility model provides a direct action formula voltage regulator of compensation spring effect, includes the main valve body (1) and drive assembly (2), the main valve body (1) is installed at drive assembly (2) lower extreme, be equipped with disk seat (11), valve clack (12), valve rod (13), valve rod cover (14) and balanced diaphragm (15) in the main valve body (1), valve rod cover (14) are fixed in main valve body (1) upper end, and establish in valve rod cover (14) valve rod (13), and valve clack (12) are fixed at valve rod (13) lower extreme, and valve clack (12) are located disk seat (11) downside, and balanced diaphragm (15) are installed in valve rod cover (14) upside, drive assembly (2) are including last membrane shell (21) and lower membrane shell (22), diaphragm (23) and tray (24), diaphragm (23) are fixed between last membrane shell (21) and lower membrane shell (22), tray (24) set up on diaphragm (23), lower membrane shell (22) is fixed in main valve body (1) upper end, valve rod (13) upper end is by lower supreme disk seat (11), valve rod cover (14), balanced diaphragm (15), lower membrane shell (22) and diaphragm (23) fixed connection on tray (24), pressure regulating spring (25) are installed to tray (24) upper end, pressure regulating spring (25) are located the cavity of epitheca shell (21), pressure regulating spring (25) upper end is fixed with spring holder (26), epitheca shell (21) top is equipped with adjusting bolt (27) to the epirelief, adjusting bolt (27) lower extreme passes epitheca shell (21) top on spring holder (26), its characterized in that: tray (24) periphery wall and last membrane shell (21) lower half internal perisporium constitute the annular installation cavity of cross-section for falling "eight" font, diaphragm (23) upwards forms the annular arch that the cross-section is omega shape in the annular installation cavity, be connected with signal pipe (3) down on membrane shell (22), signal pipe (3) are used for the pipeline intercommunication of being connected with main valve body (1) exit end.

2. A direct-acting pressure regulator for compensating spring effects as claimed in claim 1 wherein said tray (24) is an outer cone having a small top and a large bottom, and the bottom surface of the tray (24) is smoothly rounded off from its outer side wall.

3. A direct-acting pressure regulator for compensating spring effect as defined in claim 2 wherein the inner chamber of the lower half of the upper diaphragm casing (21) is an inner conical chamber with a larger upper part and a smaller lower part, and the bottom surface of the upper diaphragm casing (21) and the inner side wall of the lower half thereof are smoothly transited through an arc.

4. A direct-acting pressure regulator for compensating for the spring effect according to claim 2, wherein the generatrix of the outer side wall of the tray (24) is at an angle of 15 ° to 45 ° to the axis.

5. A direct acting pressure regulator compensating for the spring effect of claim 3 wherein the included angle of the generatrix of the conical cavity in the upper diaphragm casing (21) with the axis is the same as the included angle of the generatrix of the outer side wall of the tray (24) with the axis.