CN111998109A - Double-diaphragm voltage stabilizer - Google Patents

Abstract

The invention relates to a double-diaphragm voltage stabilizer which comprises an upper cover, a valve body and a lower cover, wherein the upper cover is provided with a first groove, a first accommodating groove and a first air inlet; the valve body is provided with a second groove, a third groove, a channel, a valve port, a second air inlet hole and an air outlet hole; the lower cover is provided with a fourth groove; still include the diaphragm, diaphragm and steady voltage spring down, the peripheral extrusion of going up the diaphragm is between upper cover and valve body, the upper and lower side correspondence of going up the diaphragm is equipped with first tray and first tray down, the peripheral extrusion of diaphragm is down between valve body and lower cover, the upper and lower side correspondence of diaphragm is equipped with tray and second tray down on the second, the side of going up of tray is equipped with the rubber valve pad just right with the valve port on the second, the tray passes through connecting piece and first tray fixed connection down on the second, steady voltage spring is in first holding tank, steady voltage spring's lower extreme roof pressure is on first tray. The device has the advantages of simple structure, sensitive action, safety, reliability, good stability and high voltage stabilization precision.

Description

Double-diaphragm voltage stabilizer

Technical Field

The invention relates to a gas pressure regulator, in particular to a double-diaphragm pressure regulator for a gas pressure regulator director.

Background

In the gas transmission and distribution field, the pressure regulator plays the effect of pressure regulating, steady voltage as an important valve member in the gas pipe net. The gas pressure regulator is divided into a direct-acting pressure regulator and an indirect-acting pressure regulator, wherein the indirect-acting pressure regulator utilizes the pressure change of an outlet and controls a driver to drive an adjusting element to move after being amplified by a director. The voltage stabilizer is used as an important component of a gas pressure regulator director and mainly plays the following roles: the unbalanced force of the valve core of the commander is reduced; improving the resolution of the director; the pressure difference borne by the main valve diaphragm of the pressure regulator is reduced. The functions can effectively improve the voltage stabilizing precision and the service life of the voltage regulator. As shown in fig. 1 and 2, the conventional pressure stabilizer is a single-diaphragm structure, and mainly comprises an upper cover a, a valve body b, a lower cover c, a diaphragm d, a lower tray e, an upper tray f, a pressure stabilizing spring g, a valve port h, a valve rod i, a valve clack j and a filter screen k, wherein the upper end and the lower end of the valve rod i are correspondingly fixedly connected with the lower tray e and the valve clack j and penetrate through the valve port h, and for the purposes of guiding and ventilating, the valve rod i needs to be in a form of square cross section and provided with arc knife edges at four corners. This structure has the following problems in practical use: 1. the inner hole of the valve port h is filled as a guide hole, and because the fit clearance between the valve port h and the valve rod i is small, impurities in the fuel gas easily cause blockage, and the valve rod i is blocked; 2. the fuel gas can generate a large amount of cold energy in the pressure regulating process, the valve rod i and the valve port h are easily locked due to expansion caused by heat and contraction caused by cold, and the valve rod i and the valve port h are often frozen together due to the cold energy because the fuel gas contains moisture, so that the ice blockage phenomenon is generated; 3. because the valve rod i occupies the inner hole sectional area of the valve port h, the actual sectional area of the inner hole of the valve port h is more than the flow area, and the unbalanced force of the valve core (valve disc) is increased. These problems affect the stability and reliability of the voltage regulator and may even cause the voltage regulator to fail.

Disclosure of Invention

The invention aims to provide a double-diaphragm voltage stabilizer which has the advantages of simple structure, sensitive action, safety, reliability, good stability and high voltage stabilization precision.

In order to solve the problems in the prior art, the invention provides a dual-diaphragm pressure stabilizer which comprises an upper cover, a valve body and a lower cover which are sequentially arranged from top to bottom, wherein the upper cover is provided with a first groove and a first accommodating groove from bottom to top, and the left side of the upper cover is provided with a first air inlet communicated with the first accommodating groove; the upper side and the lower side of the valve body are correspondingly provided with a second groove and a third groove, a channel communicated with the second groove and the third groove is arranged in the valve body, a valve port is arranged in the third groove, a second air inlet communicated with the valve port is arranged on the left side of the valve body, and an air outlet communicated with the channel is arranged on the right side of the valve body; a fourth groove is formed in the upper side face of the lower cover; the valve comprises a valve body, a valve seat, a valve rod and a spring.

Furthermore, the two-diaphragm voltage stabilizer is characterized in that the first lower tray and the second upper tray are arranged up and down correspondingly, and the three connecting pieces are uniformly distributed along the circumferential direction of the first lower tray and the second upper tray.

Further, the double-diaphragm voltage stabilizer comprises a connecting piece, wherein the connecting piece comprises an internal thread column, an upper screw and a lower screw, the upper end and the lower end of the internal thread column are correspondingly pressed on the first lower tray and the second upper tray, the upper screw penetrates through the first lower tray from top to bottom and is screwed on the internal thread column, and the lower screw penetrates through the second upper tray from bottom to top and is screwed on the internal thread column.

Further, the double-diaphragm voltage stabilizer is characterized in that a plurality of air holes are formed in the second upper tray, the second lower diaphragm and the second lower tray along the circumferential direction.

Further, the double-diaphragm voltage stabilizer is characterized in that a first threaded column is arranged on the first lower tray, penetrates through the upper diaphragm and the first upper tray from bottom to top, and is screwed with a first fastening nut at the upper side of the first upper tray; and a second threaded column is arranged on the second upper tray, penetrates through the lower diaphragm and the second lower tray from top to bottom, and is screwed with a second fastening nut at the lower side position of the second lower tray.

Furthermore, the double-diaphragm voltage stabilizer is characterized in that a positioning groove is formed in the middle of the upper side of the first upper tray, the first fastening nut is located in the positioning groove, and the lower end of the pressure stabilizing spring is located in the positioning groove around the first fastening nut.

Further, the double-diaphragm pressure stabilizer is characterized in that a threaded hole is formed in the bottom of the third groove, and the valve port is screwed in the threaded hole through an external thread.

Further, the double-diaphragm voltage stabilizer is characterized in that a second accommodating groove is formed in the position, corresponding to the second fastening nut, of the bottom of the fourth groove, and the lower end of the second threaded column is located in the second accommodating groove.

Further, the double-diaphragm voltage stabilizer is characterized in that the upper cover, the valve body and the lower cover are fixedly connected through a plurality of bolts distributed along the circumferential direction.

Compared with the prior art, the double-diaphragm voltage stabilizer has the following advantages: the upper cover, the valve body and the lower cover are sequentially arranged from top to bottom, so that the upper cover is provided with the first groove and the first accommodating groove from bottom to top, and the left side of the upper cover is provided with the first air inlet communicated with the first accommodating groove; the valve body is correspondingly provided with a second groove and a third groove on the upper side and the lower side, a channel communicated with the second groove and the third groove is arranged in the valve body, a valve port is arranged in the third groove, a second air inlet communicated with the valve port is arranged on the left side of the valve body, and an air outlet communicated with the channel is arranged on the right side of the valve body; a fourth groove is formed in the upper side face of the lower cover; and an upper diaphragm, a lower diaphragm and a pressure stabilizing spring are arranged, the upper diaphragm is positioned in a space defined by the first groove and the second groove, the periphery of the upper diaphragm is extruded between the upper cover and the valve body, a first upper tray and a first lower tray are correspondingly arranged on the upper side and the lower side of the middle part of the upper diaphragm, the lower diaphragm is positioned in a space defined by the third groove and the fourth groove, the periphery of the lower diaphragm is extruded between the valve body and the lower cover, a second upper tray and a second lower tray are correspondingly arranged on the upper side and the lower side of the middle part of the lower diaphragm, a rubber valve pad which is right opposite to a valve port is arranged in the middle of the upper side surface of the second upper tray, the second upper tray is fixedly connected with the first lower tray through a connecting piece positioned in the channel, the pressure stabilizing spring is arranged in the first accommodating groove, and the lower end of the pressure stabilizing spring is pressed on the first upper tray. Therefore, the double-diaphragm voltage stabilizer with simple structure, sensitive action, safety, reliability, good stability and high voltage stabilization precision is formed. In practical application, the first air inlet hole is connected with an outlet of the pressure regulator through a pipeline, the second air inlet hole is connected with an inlet of the pressure regulator through a pipeline, and the air outlet hole is connected with an inlet of the director through a pipeline. The upper diaphragm is used as a part for sensing pressure change and generating displacement, when the pressure of the air outlet hole is kept unchanged, the pressure on the upper side and the lower side of the upper diaphragm is balanced and kept still, and the opening among the valve port, the second upper tray and the rubber valve pad is also kept unchanged; when the pressure of the air outlet is reduced, the upper diaphragm can move downwards, and because the second upper tray is fixedly connected with the first lower tray through the connecting piece, the lower diaphragm can synchronously move downwards along with the upper diaphragm, the opening among the valve port, the second upper tray and the rubber valve pad is increased, the pressure drop of the pressure of the second air inlet can be reduced when the opening is increased, and the pressure of the air outlet is increased and the original pressure is recovered; in a similar way, when the pressure of the air outlet hole rises, the upper diaphragm can move upwards, the lower diaphragm can move upwards along with the upper diaphragm synchronously, the opening degree between the valve port and the second upper tray and between the valve port and the rubber valve pad is reduced, the pressure drop of the pressure of the second air inlet hole can be increased due to the reduction of the opening degree, and therefore the pressure of the air outlet hole is reduced and the original pressure is recovered. The invention realizes the synchronous movement of the lower diaphragm and the upper diaphragm by arranging the lower diaphragm, the second upper tray and the second lower tray, arranging the rubber valve pad which is right opposite to the valve port on the second upper tray and fixedly connecting the second upper tray with the first lower tray through the connecting piece, wherein the second upper tray and the rubber valve pad play a role of a valve clack, and compared with the existing voltage stabilizer, the invention can produce the following beneficial effects: 1. the small-gap fit structure that the valve rod penetrates through the valve port is changed, the anti-pollution capability is improved, the phenomena of valve port blockage and valve rod jamming caused by impurities or small particles in fuel gas are avoided, and an additional filtering device is not needed; 2. because of no small clearance fit structure of the valve rod and the valve port, the phenomena of ice blockage and valve rod locking caused by expansion with heat and contraction with cold are avoided; 3. the sectional area of the valve port can be effectively reduced, and further the unbalanced force of the valve core (valve) of the voltage stabilizer is reduced.

The present invention will be described in more detail with reference to the following embodiments and accompanying drawings.

Drawings

FIG. 1 is a cross-sectional view of a prior art single diaphragm regulator;

FIG. 2 is a view taken along line L-L of FIG. 1;

FIG. 3 is a front view of a dual diaphragm regulator in accordance with the present invention;

FIG. 4 is a right side view of a dual diaphragm regulator in accordance with the present invention;

FIG. 5 is a perspective view of a dual diaphragm regulator in accordance with the present invention;

FIG. 6 is a view taken along line A-A of FIG. 3;

fig. 7 is a view from the direction B-B in fig. 4.

Detailed Description

First, it should be noted that, the directional terms such as up, down, left, right, front, rear, etc. described in the present invention are only described with reference to the accompanying drawings for easy understanding, and do not limit the technical solution and the claimed scope of the present invention.

As shown in fig. 3 to 7, the embodiment of the dual-diaphragm regulator of the present invention includes an upper cover 1, a valve body 2, and a lower cover 3 sequentially disposed from top to bottom. Make upper cover 1 from lower supreme first recess 11 and the first holding tank 12 of setting up, set up the first inlet port 13 with first holding tank 12 intercommunication in the left side of upper cover 1. The valve body 2 is correspondingly provided with a second groove 21 and a third groove 22 on the upper and lower sides, a channel 23 communicating the second groove 21 and the third groove 22 is arranged in the valve body 2, a valve port 24 is arranged in the third groove 22, a second air inlet 25 communicating with the valve port 24 is arranged on the left side of the valve body 2, and an air outlet 26 communicating with the channel 23 is arranged on the right side of the valve body 2. The lower cover 3 is provided with a fourth recess 31 on the upper side. And an upper diaphragm 4, a lower diaphragm 5 and a pressure stabilizing spring 6 are arranged. The upper diaphragm 4 is positioned in a space enclosed by the first groove 11 and the second groove 21, the periphery of the upper diaphragm 4 is squeezed between the upper cover 1 and the valve body 2, and a first upper tray 41 and a first lower tray 42 are correspondingly arranged on the upper side and the lower side of the middle part of the upper diaphragm 4. The lower diaphragm 5 is arranged in a space enclosed by the third groove 22 and the fourth groove 31, the periphery of the lower diaphragm 5 is extruded between the valve body 2 and the lower cover 3, a second upper tray 51 and a second lower tray 52 are correspondingly arranged on the upper side and the lower side of the middle part of the lower diaphragm 5, a rubber valve pad 53 which is opposite to the valve port 24 is arranged on the middle part of the upper side surface of the second upper tray 51, and the second upper tray 51 is fixedly connected with the first lower tray 42 through a connecting piece 7 arranged in the channel 23. The stabilizer spring 6 is disposed in the first receiving groove 12 and the lower end of the stabilizer spring 6 is pressed against the first upper tray 41.

The double-diaphragm voltage stabilizer with simple structure, sensitive action, safety, reliability, good stability and high voltage stabilization precision is formed by the structural arrangement. In practical application, the first air inlet hole 13 is connected with the outlet of the pressure regulator through a pipeline, the second air inlet hole 25 is connected with the inlet of the pressure regulator through a pipeline, and the air outlet hole 26 is connected with the inlet of the director through a pipeline. The upper diaphragm 4 is used as a part for sensing pressure change and generating displacement, when the pressure of the air outlet 26 is kept unchanged, the pressures on the upper side and the lower side of the upper diaphragm 4 are balanced and kept unchanged, and the opening degrees between the valve port 24 and the second upper tray 51 and the rubber valve pad 53 are also kept unchanged; when the pressure of the air outlet 26 is reduced, the upper diaphragm 4 moves downwards, and because the second upper tray 51 is fixedly connected with the first lower tray 42 through the connecting piece 7, the lower diaphragm 5 moves downwards synchronously along with the upper diaphragm 4, the opening between the valve port 24 and the second upper tray 51 and the rubber valve pad 53 is increased, and the increase of the opening reduces the pressure drop of the pressure of the second air inlet 25, so that the pressure of the air outlet 26 is increased and the original pressure is recovered; similarly, when the pressure of the air outlet 26 rises, the upper diaphragm 4 will move upwards, the lower diaphragm 5 will move upwards synchronously with the upper diaphragm 4, and the opening between the valve port 24 and the second upper tray 51 and the rubber valve pad 53 is reduced, and the reduction of the opening will increase the pressure drop to the pressure of the second air inlet 25, so that the pressure of the air outlet 26 drops and the original pressure is recovered. According to the invention, the lower diaphragm 5, the second upper tray 51 and the second lower tray 52 are arranged, the rubber valve pad 53 opposite to the valve port 24 is arranged on the second upper tray 51, and the second upper tray 51 is fixedly connected with the first lower tray 42 through the connecting piece 7, so that the lower diaphragm 5 and the upper diaphragm 4 can move synchronously, wherein the second upper tray 51 and the rubber valve pad 53 play a role of a valve flap, and compared with the existing pressure stabilizer, the pressure stabilizer can produce the following beneficial effects: 1. the small-gap fit structure that the valve rod penetrates through the valve port is changed, the anti-pollution capability is improved, the phenomena of valve port blockage and valve rod jamming caused by impurities or small particles in fuel gas are avoided, and an additional filtering device is not needed; 2. because of no small clearance fit structure of the valve rod and the valve port, the phenomena of ice blockage and valve rod locking caused by expansion with heat and contraction with cold are avoided; 3. the sectional area of the valve port can be effectively reduced, and further the unbalanced force of the valve core (valve) of the voltage stabilizer is reduced. In practical applications, a certain distance is left between the first upper tray 41 and the upper cover 1, between the first lower tray 42 and the valve body 2, between the second upper tray 51 and the valve body 2, and between the second lower tray 52 and the lower cover 3, so that the upper diaphragm 4 and the lower diaphragm 5 can move up and down.

As an optimized scheme, in the present embodiment, the first lower tray 42 and the second upper tray 51 are disposed in a vertically corresponding manner, and three connecting members 7 are disposed, and the three connecting members 7 are uniformly distributed along the circumferential direction of the first lower tray 42 and the second upper tray 51. The structural arrangement enhances the stability of the structure and the balance of stress, and ensures the synchronism of the movement of the upper diaphragm 4 and the lower diaphragm 5. It should be noted that, in order to facilitate the arrangement of the connecting member 7 and to ensure smooth air flow, the present invention provides the channel 23 with an approximately arc-shaped configuration along the outer periphery of the valve port 24. In order to prevent the diaphragm 5 from moving under the influence of the breath holding, the second upper tray 51, the lower diaphragm 5 and the second lower tray 52 are provided with a plurality of air holes 54 along the circumferential direction in the present embodiment.

As a specific embodiment, the present invention adopts the following structure for the connecting member 7: the upper and lower ends of the internal thread column 71 are correspondingly pressed on the first lower tray 42 and the second upper tray 51, the upper screw 72 penetrates through the first lower tray 42 from top to bottom and is screwed on the internal thread column 71, and the lower screw 73 penetrates through the second upper tray 51 from bottom to top and is screwed on the internal thread column 71. The device has the advantages of simple structure and convenient assembly and disassembly. Meanwhile, the first upper tray 41 and the first lower tray 42 are fixedly connected to the upper film 4 as follows: the first threaded column 421 is disposed on the first lower tray 42, so that the first threaded column 421 passes through the upper membrane 4 and the first upper tray 41 from bottom to top, and the first fastening nut 422 is screwed on the first threaded column 421 at the upper side of the first upper tray 41. The device has the characteristics of simple structure, stable connection and convenient disassembly and assembly. Similarly, the second upper tray 51, the second lower tray 52 and the lower film 5 are connected and fixed as follows: the second upper tray 51 is provided with a second screw column 511, the second screw column 511 passes through the lower membrane 5 and the second lower tray 52 from top to bottom, and a second fastening nut 512 is screwed on the second screw column 511 at the lower side of the second lower tray 52.

As a specific embodiment, the present invention provides a positioning groove at the middle of the upper side of the first upper tray 41, and the first fastening nut 422 is positioned in the positioning groove, and the lower end of the pressure stabilizing spring 6 is positioned in the positioning groove around the first fastening nut 422. Due to the arrangement of the structure, the first fastening nut 422 and the positioning grooves around the first fastening nut 422 play a role of a spring seat, and the stability of the structure and the stability of the action are enhanced. For the convenience of assembly and disassembly, the present embodiment provides a threaded hole at the bottom of the third groove 22, and the valve port 24 is screwed into the threaded hole through an external thread. In order to reduce the volume and improve the compactness of the structure, the second receiving groove 32 is provided at a position where the bottom of the fourth groove 31 corresponds to the second fastening nut 512, and the lower end of the second threaded column 511 is located in the second receiving groove 32. For improving the convenience of dismouting, this embodiment has made upper cover 1, valve body 2 and lower cover 3 adopt following connection fixed mode: a plurality of bolt holes are arranged on the upper cover 1, the valve body 2 and the lower cover 3 along the circumferential direction, and a plurality of bolts 8 correspondingly penetrate through the bolt holes to fix the three together. It should be noted that, in practical applications, in order to facilitate connection with a pipeline and improve convenience of operation, the present invention generally provides the first air inlet hole 13, the second air inlet hole 25 and the air outlet hole 26 with internal threads.

The above examples are only for describing the preferred embodiments of the present invention, and do not 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 invention defined by the claims without departing from the design concept of the present invention.

Claims (9)

1. A double-diaphragm voltage stabilizer is characterized by comprising an upper cover (1), a valve body (2) and a lower cover (3) which are sequentially arranged from top to bottom, wherein the upper cover (1) is provided with a first groove (11) and a first accommodating groove (12) from bottom to top, and the left side of the upper cover (1) is provided with a first air inlet (13) communicated with the first accommodating groove (12); a second groove (21) and a third groove (22) are correspondingly arranged on the upper side surface and the lower side surface of the valve body (2), a channel (23) for communicating the second groove (21) with the third groove (22) is arranged in the valve body (2), a valve port (24) is arranged in the third groove (22), a second air inlet hole (25) communicated with the valve port (24) is arranged on the left side of the valve body (2), and an air outlet hole (26) communicated with the channel (23) is arranged on the right side of the valve body (2); a fourth groove (31) is formed in the upper side face of the lower cover (3); the valve further comprises an upper diaphragm (4), a lower diaphragm (5) and a pressure stabilizing spring (6), wherein the upper diaphragm (4) is positioned in a space enclosed by the first groove (11) and the second groove (21), the periphery of the upper diaphragm (4) is extruded between the upper cover (1) and the valve body (2), the upper side and the lower side of the middle part of the upper diaphragm (4) are correspondingly provided with a first upper tray (41) and a first lower tray (42), the lower diaphragm (5) is positioned in a space enclosed by the third groove (22) and the fourth groove (31), the periphery of the lower diaphragm (5) is extruded between the valve body (2) and the lower cover (3), the upper side and the lower side of the middle part of the lower diaphragm (5) are correspondingly provided with a second upper tray (51) and a second lower tray (52), the middle part of the upper side surface of the second upper tray (51) is provided with a rubber valve pad (53) right opposite to the valve port (24), and the second upper tray (51) is fixedly connected with the first lower tray (42) through a connecting piece (7) positioned in the channel (23), the pressure stabilizing spring (6) is positioned in the first accommodating groove (12), and the lower end of the pressure stabilizing spring (6) is pressed on the first upper tray (41).

2. The dual-diaphragm regulator of claim 1, wherein the first lower tray (42) and the second upper tray (51) are disposed vertically, and the number of the connecting members (7) is three and is uniformly distributed along the circumferential direction of the first lower tray (42) and the second upper tray (51).

3. The dual-diaphragm voltage stabilizer according to claim 2, wherein the connecting member (7) comprises an internal threaded column (71), an upper screw (72) and a lower screw (73), the upper end and the lower end of the internal threaded column (71) are correspondingly pressed against the first lower tray (42) and the second upper tray (51), the upper screw (72) penetrates through the first lower tray (42) from top to bottom and is screwed on the internal threaded column (71), and the lower screw (73) penetrates through the second upper tray (51) from bottom to top and is screwed on the internal threaded column (71).

4. The dual-diaphragm regulator of claim 3, wherein the second upper tray (51), the lower diaphragm (5) and the second lower tray (52) are provided with a plurality of ventilation holes (54) along the circumferential direction.

5. The dual-diaphragm voltage stabilizer according to claim 4, wherein the first lower tray (42) is provided with a first threaded column (421), the first threaded column (421) penetrates through the upper diaphragm (4) and the first upper tray (41) from bottom to top, and the first threaded column (421) is screwed with a first fastening nut (422) at the upper side position of the first upper tray (41); and a second threaded column (511) is arranged on the second upper tray (51), the second threaded column (511) penetrates through the lower membrane (5) and the second lower tray (52) from top to bottom, and a second fastening nut (512) is screwed on the second threaded column (511) at the lower side of the second lower tray (52).

6. The dual diaphragm regulator of claim 5 wherein the first upper tray (41) has a detent in the middle of its upper side, the first locking nut (422) is located in the detent, and the regulator spring (6) has its lower end located in the detent around the first locking nut (422).

7. The dual-diaphragm regulator of any one of claims 1-6, wherein the bottom of the third groove (22) is provided with a threaded hole, and the valve port (24) is screwed into the threaded hole through an external thread.

8. The dual-diaphragm regulator according to any one of claims 1-6, wherein the bottom of the fourth groove (31) is provided with a second receiving groove (32) at a position corresponding to the second fastening nut (512), and the lower end of the second threaded post (511) is positioned in the second receiving groove (32).

9. A dual diaphragm stabiliser as claimed in any of claims 1 to 6 in which the upper cap (1), valve body (2) and lower cap (3) are fixedly connected by a plurality of bolts (8) distributed circumferentially.

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