CN217381866U - Diaphragm breaking self-repairing pressure regulator - Google Patents

Abstract

The invention discloses a diaphragm breakage self-repairing type pressure regulator, and relates to the technical field of gas pipe network pressure regulators. The diaphragm assembly of the pressure regulator comprises a diaphragm and a recovery tray, and the diaphragm is fixedly assembled with the valve rod through the recovery tray; the recovery tray is assembled in the upper membrane cover in a sliding and sealing mode, the upper membrane cavity is divided into a recovery cavity I and a recovery cavity II, and a communication channel for communicating the recovery cavity I with the recovery cavity II is arranged on the recovery tray; the communicating channel is provided with a blocking valve assembly for blocking the communication between the recovery cavity I and the recovery cavity II. The utility model discloses a two recombination combination forms of diaphragm and piston to realize the ruptured selfreparing of diaphragm, when the diaphragm is normal, the diaphragm subassembly plays the effect by the diaphragm and carries out pressure control and regulation, and when the diaphragm broke, the function of diaphragm was replaced by the piston, ensured that the diaphragm subassembly still can normal operating, in order to avoid producing the loss that the parking maintenance brought.

Description

Diaphragm breaking self-repairing pressure regulator

Technical Field

The utility model relates to a gas pipe network regulator technical field, more specifically say and relate to a diaphragm breaks self-repairing type voltage regulator.

Background

The pressure control system of the natural gas transmission station mainly comprises a safety shut-off valve, a monitoring pressure regulator and a working pressure regulator, wherein a valve body of the working pressure regulator is connected with a pipeline behind the monitoring pressure regulator through a flange, a preposed and controlled commander on the valve body is connected with the pipeline behind the working pressure regulation through a pressure guiding signal conduit, receives downstream feedback control pressure, controls the opening degree of a valve port of the pressure regulator, controls the downstream pressure within a set range, and achieves the purpose of supplying gas pressure to a downstream pipeline in normal time and providing stable natural gas transmission pressure of a 'working set value'.

Currently, the existing self-operated pressure regulators are still lacking in terms of safety, especially at the diaphragm of the actuator. In many severe working conditions, the operating pressure is unstable, the vertical fluctuation is large, the pressure is easy to jump up, the process requirement adjustment precision is high, and the air cylinder is not suitable for being used as a control element of an actuating mechanism; the medium acts on the diaphragm through the pressure guide pipe, and when the pressure is greater than the withstand pressure of the diaphragm, the diaphragm can suddenly break, so that the production is stopped for maintenance, and if the medium is toxic or inflammable and explosive, the medium can cause larger loss.

The publication date is 2015, 10 and 28 months, the publication number is CN204729701U, and the name is 'self-operated pressure regulating valve with double-diaphragm middle band diaphragm rupture indicator', and concretely discloses a self-operated pressure regulating valve with a double-diaphragm middle band diaphragm rupture indicator, which consists of a valve body, a valve seat, a valve core part, a valve cover, a pressure regulating disc, a spring seat, a push rod and double diaphragms; the valve body is internally provided with a valve seat, a valve element part, a valve cover, a pressure regulating disc, a spring seat and a valve element part, the upper end of the valve element part is connected with a push rod, the valve cover is arranged outside the valve element part, the pressure regulating disc is also arranged on the valve cover and is connected with a spring arranged on the spring seat, the push rod is provided with a double diaphragm, and the double diaphragm is composed of a lower diaphragm cover, a heightening ring, an upper diaphragm cover, an upper diaphragm, a tray, a retainer ring, a diaphragm fracture indicator and a lower diaphragm.

Above-mentioned prior art is through setting up two diaphragms in order to avoid the diaphragm to break the back, and the diaphragm assembly inefficacy is so that production parking maintenance's problem, but above-mentioned two diaphragm structure still has certain defect, promptly under abominable operating mode, when the pressure fluctuation is great, now can break lower floor's diaphragm, also has the risk of breaking upper diaphragm so, consequently, above-mentioned two diaphragm structural design still has two diaphragms to break and leads to the diaphragm assembly to lose efficacy so that production parking maintenance's problem.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect and not enough that exist among the above-mentioned prior art, the utility model provides a diaphragm breaks self-repairing type voltage regulator, the utility model discloses an invention aim at solve the diaphragm and break, even two diaphragms break and cause the diaphragm subassembly to become invalid to the problem of production parking maintenance. The utility model discloses a two recombination combination forms of diaphragm and piston to realize the ruptured selfreparing of diaphragm, when the diaphragm is normal, the diaphragm subassembly plays the effect by the diaphragm and carries out pressure control and regulation, and when the diaphragm broke, the function of diaphragm was replaced by the piston, ensured that the diaphragm subassembly still can normal operating, in order to avoid producing the loss that the parking maintenance brought.

In order to solve the problems existing in the prior art, the utility model is realized by the following technical scheme.

The utility model provides a diaphragm rupture self-repairing type pressure regulator, which comprises an upper diaphragm cover, a lower diaphragm cover, a valve rod and a diaphragm assembly, wherein the diaphragm assembly comprises a diaphragm and a recovery tray, the diaphragm is fixed between the upper diaphragm cover and the lower diaphragm cover, and a cavity formed by the upper diaphragm cover and the lower diaphragm cover is divided into a diaphragm upper cavity and a diaphragm upper cavity; the diaphragm is fixedly assembled with the valve rod through the recovery tray; the recovery tray is assembled in the upper film cover in a sliding and sealing mode, the upper film cavity is divided into a recovery cavity I and a recovery cavity II, the recovery cavity I is formed between the lower portion of the recovery tray and the film, the recovery cavity II is formed between the upper portion of the recovery tray and the upper film cover, and a communication channel for communicating the recovery cavity I and the recovery cavity II is arranged on the recovery tray; the communicating channel is provided with a blocking valve assembly for blocking the communication between the recovery cavity I and the recovery cavity II, and the blocking valve assembly blocks pressure difference between the recovery cavity I and the recovery cavity II.

The working principle of the utility model is as follows:

when the diaphragm works normally (the diaphragm is not broken), controlling the pressure of an air source to enter a lower cavity of the diaphragm, and communicating the upper cavity of the diaphragm with the pressure of an outlet of a pressure regulator; the pressure at the outlet of the pressure regulator firstly enters the recovery cavity II and then enters the recovery cavity I through the communication channel, so that the pressure at the outlet of the pressure regulator acts on the diaphragm; at the moment, the self-operated pressure regulating function is realized by the membrane, and the recovery tray does not work.

When the diaphragm is broken, controlling the pressure of an air source to enter the recovery cavity I from the lower cavity of the diaphragm, wherein the pressure in the recovery cavity I is greater than the pressure in the recovery cavity II, so that the blocking valve component plays a blocking role, and a communication channel between the recovery cavity I and the recovery cavity II is blocked; at the moment, the function of the diaphragm is replaced by the recovery tray, the diaphragm rupture fault is repaired, and the pressure regulator automatically recovers to operate.

In order to better achieve the object of the present invention, it also has the following technical features:

an assembly groove is formed in one end, close to the recovery cavity II, of the communication channel, and a communication hole for communicating the assembly groove with the recovery cavity I is formed in the bottom of the assembly groove; the communication hole and the fitting groove together form the communication passage.

The block valve assembly is fitted in the fitting groove.

The blocking valve assembly comprises a blocking valve port, a steel ball and a blocking spring, the blocking valve port is assembled at the opening of the assembling groove of the communicating channel, the steel ball is arranged in the assembling groove, and the blocking spring is arranged between the steel ball and the bottom of the assembling groove; the blocking valve port is matched with the steel ball to block the communication channel. Through this block valve module structure, after the diaphragm breaks, diaphragm lower chamber pressure enters into and resumes cavity I, and diaphragm lower chamber pressure passes through the intercommunicating pore and enters into the assembly groove to on using the steel ball, under the effect of spring and diaphragm lower chamber pressure, overcome the steel ball dead weight, with the steel ball shutoff to blocking the valve port on, block the intercommunication passageway, prevent that diaphragm lower chamber pressure from entering into and resuming in cavity II, at this moment, the diaphragm function is recovered the tray and is got the bag, the automatic operation that resumes of voltage regulator.

One end of the communicating hole of the communicating channel, which is close to the assembling groove, is provided with a convex part which protrudes out of the bottom of the assembling groove, the top end of the convex part forms a communicating valve port which is matched with the steel ball, and the blocking spring is sleeved on the convex part.

The height of the projection is greater than the height of the spring in the maximum compressed state. The steel ball can be matched with the convex hole position to block the hole position, so that the diaphragm is prevented from being damaged by the fact that the pressure in the cavity of the diaphragm is suddenly increased and enters the cavity I.

And a pressure difference transmitter for detecting the pressure difference between the diaphragm upper cavity and the diaphragm lower cavity is arranged between the diaphragm upper cavity and the diaphragm lower cavity. When the differential pressure transmitter detects that the differential pressure value between the upper cavity of the diaphragm and the lower cavity of the diaphragm suddenly decreases beyond a normal range, the diaphragm is proved to be broken.

Furthermore, the recovery cavity I is connected with a pressure transmitter. When the pressure in the recovery chamber i suddenly changes and goes outside the normal range, it is evident that the diaphragm is ruptured.

The blocking valve component is a one-way valve which blocks the pressure of the recovery cavity I and enters the recovery cavity II.

The diaphragm assembly further comprises a bearing tray, the bearing tray is located below the diaphragm, the bearing tray and the recovery tray clamp the diaphragm, and the diaphragm is fixed on the valve rod.

Compared with the prior art, the utility model discloses profitable technological effect who brings shows:

1. the utility model discloses a two recombination combination forms of diaphragm and piston to realize the ruptured selfreparing of diaphragm, when the diaphragm is normal, the diaphragm subassembly plays the effect by the diaphragm and carries out pressure control and regulation, and when the diaphragm broke, the function of diaphragm was replaced by the piston, ensured that the diaphragm subassembly still can normal operating, in order to avoid producing the loss that the parking maintenance brought.

2. The utility model discloses block valve module structure, after the diaphragm breaks, diaphragm cavity of resorption pressure enters into and resumes cavity I, and diaphragm cavity of resorption pressure passes through the intercommunicating pore and enters into the assembly groove to on using the steel ball, under the effect of spring and diaphragm cavity of resorption pressure, overcome the steel ball dead weight, with the steel ball shutoff to blocking the valve port on, block the intercommunication passageway, prevent diaphragm cavity of resorption pressure to enter into and resume in cavity II, at this moment, the diaphragm function is resumed the tray and is got the bag, the operation of voltage regulator automatic recovery.

3. The utility model discloses intercommunicating pore protrusion assembly tank bottom can spacing spring shrink direction on the one hand, avoids the spring clip to hinder, and on the other hand makes the steel ball can cooperate with this convex hole site, and this hole site of shutoff avoids diaphragm epicoele pressure to increase suddenly, gets into cavity I and causes the damage to the diaphragm.

4. The utility model discloses set up pressure differential transmitter, detect the pressure differential value between diaphragm epicoele and the diaphragm lower chamber and reduce suddenly when pressure differential transmitter, when surpassing normal range, just prove that the diaphragm breaks. The occurrence of a rupture failure of the diaphragm can be monitored to alert an operator to replace the diaphragm during subsequent maintenance.

5. The utility model discloses in resume cavity I and be connected with pressure transmitter. When the pressure in the recovery chamber i suddenly changes and goes outside the normal range, it is evident that the diaphragm is ruptured. The occurrence of a rupture failure of the diaphragm can also be monitored to alert an operator to replace the diaphragm during subsequent maintenance.

Drawings

Fig. 1 is a schematic structural view of a pressure regulator diaphragm assembly of the present invention;

fig. 2 is a schematic diagram of the overall structure of the voltage regulator of the present invention;

FIG. 3 is a schematic structural view of a block valve assembly in the pressure regulator of the present invention;

reference numerals: 1. go up membrane lid, 2, lower membrane lid, 3, valve rod, 4, diaphragm, 5, resume the tray, 6, diaphragm upper chamber, 7, diaphragm lower chamber, 8, resume cavity I, 9, resume cavity II, 10, intercommunication passageway, 11, block valve module, 12, assembly groove, 13, intercommunicating pore, 14, block valve port, 15, steel ball, 16, block spring, 17, bulge, 18, differential pressure transmitter, 19, pressure transmitter, 20, bear the tray.

Detailed Description

The technical solution of the present invention will be further elaborated with reference to the drawings attached to the description. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, unless the context clearly dictates otherwise.

Referring to the accompanying drawings 1 and 2 of the specification, the present embodiment provides a diaphragm rupture self-repairing type pressure regulator, which includes an upper diaphragm cover 1, a lower diaphragm cover 2, a valve rod 3 and a diaphragm assembly, where the diaphragm assembly includes a diaphragm 4 and a recovery tray 5, the diaphragm 4 is fixed between the upper diaphragm cover 1 and the lower diaphragm cover 2, and divides a cavity formed by the upper diaphragm cover 1 and the lower diaphragm cover 2 into a diaphragm upper cavity 6 and a diaphragm upper cavity 6; the membrane 4 is fixedly assembled with the valve rod 3 through the recovery tray 5; the recovery tray 5 is assembled in the upper film cover 1 in a sliding and sealing mode, the diaphragm upper cavity 6 is divided into a recovery cavity I8 and a recovery cavity II 9, the recovery cavity I8 is formed between the lower portion of the recovery tray 5 and the diaphragm 4, the recovery cavity II 9 is formed between the upper portion of the recovery tray 5 and the upper film cover 1, and a communication channel 10 for communicating the recovery cavity I8 with the recovery cavity II 9 is arranged on the recovery tray 5; the communicating channel 10 is provided with a blocking valve assembly 11 for blocking the communication between the recovery cavity I8 and the recovery cavity II 9, and the blocking valve assembly 11 blocks the pressure difference between the recovery cavity I8 and the recovery cavity II 9.

The working principle is as follows: when the diaphragm 4 works normally (the diaphragm 4 is not broken), the pressure of an air source is controlled to enter the diaphragm lower cavity 7, and the diaphragm upper cavity 6 is communicated with the pressure of the outlet of the pressure regulator; the pressure at the outlet of the pressure regulator firstly enters the recovery cavity II 9 and then enters the recovery cavity I8 through the communication channel 10, so that the pressure at the outlet of the pressure regulator acts on the diaphragm 4; at this time, the self-operated pressure regulating function is realized by the membrane 4, and the recovery tray 5 does not work.

When the diaphragm is broken, controlling the pressure of an air source to enter a recovery cavity I8 from a diaphragm lower cavity 7, wherein the pressure in the recovery cavity I8 is greater than the pressure in a recovery cavity II 9, so that a blocking valve assembly 11 plays a blocking role, and a communication channel 10 between the recovery cavity I8 and the recovery cavity II 9 is blocked; at the moment, the function of the diaphragm 4 is replaced by the recovery tray 5, the diaphragm rupture fault is repaired, and the pressure regulator automatically recovers to operate.

As an implementation manner of the embodiment, one end of the communication channel 10 close to the recovery cavity ii 9 is provided with a fitting groove 12, and the bottom of the fitting groove 12 is provided with a communication hole 13 communicating the fitting groove 12 and the recovery cavity i 8; the communication hole 13 and the fitting groove 12 together form the communication passage 10.

Further, the blocking valve assembly 11 is fitted in the fitting groove 12. Convenient to detach and assemble and is beneficial to maintenance.

As another embodiment of this embodiment, referring to fig. 3 of the specification, the blocking valve assembly 11 includes a blocking valve port 14, a steel ball 15 and a blocking spring 16, the blocking valve port 14 is mounted at the opening of the mounting groove 12 of the communicating channel 10, the steel ball 15 is disposed in the mounting groove 12, and the blocking spring 16 is disposed between the steel ball 15 and the bottom of the mounting groove 12; the blocking valve port 14 is matched with the steel ball 15 to block the communication channel 10. Through this block 11 structures of valve assembly, after the diaphragm breaks, diaphragm lower chamber 7 pressure enters into and resumes I8 of cavity, diaphragm lower chamber 7 pressure enters into assembly groove 12 through intercommunicating pore 13, and on using steel ball 15, under the effect of 7 pressures in spring and the diaphragm lower chamber, overcome steel ball 15 dead weight, block steel ball 15 on blocking valve port 14, block intercommunication passageway 10, prevent diaphragm lower chamber 7 pressure to enter into and resume II 9 of cavity, at this moment, 4 functions of diaphragm are resumed tray 5 and are got the bag, the automatic operation that resumes of voltage regulator.

Furthermore, one end of the communication hole 13 of the communication channel 10 close to the assembly groove 12 is provided with a convex part 17 protruding from the bottom of the assembly groove 12, a communication valve port adapted to the steel ball 15 is formed at the top end of the convex part 17, and the blocking spring 16 is sleeved on the convex part 17.

The height of the projection 17 is greater than the height of the spring in its most compressed state. So that the steel ball 15 can be matched with the convex hole position to block the hole position, and the damage to the diaphragm 4 caused by the sudden increase of the pressure of the diaphragm upper cavity 6 and the entering of the cavity I is avoided.

As another embodiment of this embodiment, a differential pressure transmitter 18 for detecting a differential pressure between the diaphragm upper chamber 6 and the diaphragm lower chamber 7 is disposed between the diaphragm upper chamber 6 and the diaphragm lower chamber 7. A diaphragm rupture is evidenced when differential pressure transducer 18 detects a sudden decrease in the differential pressure value between diaphragm upper chamber 6 and diaphragm lower chamber 7, beyond the normal range.

As another embodiment of this embodiment, as shown in fig. 1, the recovery chamber i 8 is connected to a pressure transmitter 19. (FIG. 1 shows pressure transducer 19 coupled to recovery chamber II 9, but can be adjusted as appropriate.) diaphragm rupture is evidenced when the pressure in recovery chamber I8 changes abruptly and falls outside of the normal range.

As another embodiment of this embodiment, the blocking valve assembly 11 is a one-way valve for blocking the pressure in the recovery chamber i 8 from entering the recovery chamber ii 9.

As another embodiment of this embodiment, as shown in fig. 1, the diaphragm assembly further includes a carrier tray 20, the carrier tray 20 is located below the diaphragm 4, and the carrier tray 20 and the recovery tray 5 clamp the diaphragm 4 to fix the diaphragm 4 to the valve stem 3.

Claims (10)

1. Diaphragm fracture self-repairing type voltage regulator, including upper film cover (1), lower membrane cover (2), valve rod (3) and diaphragm subassembly, its characterized in that: the diaphragm assembly comprises a diaphragm (4) and a recovery tray (5), wherein the diaphragm (4) is fixed between the upper diaphragm cover (1) and the lower diaphragm cover (2) to divide a cavity formed by the upper diaphragm cover (1) and the lower diaphragm cover (2) into a diaphragm upper cavity (6) and a diaphragm upper cavity (6); the membrane (4) is fixedly assembled with the valve rod (3) through the recovery tray (5); the recovery tray (5) is assembled in the upper film cover (1) in a sliding and sealing mode, the diaphragm upper cavity (6) is divided into a recovery cavity I (8) and a recovery cavity II (9), the recovery cavity I (8) is formed between the lower portion of the recovery tray (5) and the diaphragm (4), the recovery cavity II (9) is formed between the upper portion of the recovery tray (5) and the upper film cover (1), and a communication channel (10) for communicating the recovery cavity I (8) with the recovery cavity II (9) is arranged on the recovery tray (5); the communicating channel (10) is provided with a blocking valve component (11) communicated with the recovering cavity I (8) and the recovering cavity II (9), and the blocking valve component (11) is blocked by pressure difference between the recovering cavity I (8) and the recovering cavity II (9).

2. A diaphragm rupture self-repairing pressure regulator according to claim 1, wherein: an assembly groove (12) is formed in one end, close to the recovery cavity II (9), of the communication channel (10), and a communication hole (13) for communicating the assembly groove (12) with the recovery cavity I (8) is formed in the bottom of the assembly groove (12); the communication hole (13) and the fitting groove (12) together form the communication passage (10).

3. A diaphragm rupture self-repairing pressure regulator according to claim 2, wherein: the shut-off valve assembly (11) is fitted in the fitting groove (12).

4. A diaphragm rupture self-healing pressure regulator according to any one of claims 1 to 3, wherein: the blocking valve component (11) comprises a blocking valve port (14), a steel ball (15) and a blocking spring (16), the blocking valve port (14) is assembled at an opening of the assembling groove (12) of the communicating channel (10), the steel ball (15) is arranged in the assembling groove (12), and the blocking spring (16) is arranged between the steel ball (15) and the bottom of the assembling groove (12); the blocking valve port (14) is matched with the steel ball (15) to block the communicating channel (10).

5. A diaphragm rupture self-repairing pressure regulator according to claim 4, wherein: one end of the communicating hole (13) of the communicating channel (10) close to the assembling groove (12) is provided with a convex part (17) protruding out of the bottom of the assembling groove (12), a communicating valve port matched with the steel ball (15) is formed at the top end of the convex part (17), and the convex part (17) is sleeved with a blocking spring (16).

6. A diaphragm rupture self-repairing pressure regulator according to claim 5, wherein: the height of the projection (17) is greater than the height of the spring in the maximum compressed state.

7. The diaphragm rupture self-repairing pressure regulator of claim 1, 2, 3, 5 or 6, wherein: and a pressure difference transmitter (18) for detecting the pressure difference between the diaphragm upper cavity (6) and the diaphragm lower cavity (7) is arranged between the diaphragm upper cavity (6) and the diaphragm lower cavity (7).

8. The diaphragm rupture self-healing pressure regulator of claim 1, 2, 3, 5 or 6, wherein: and the recovery cavity I (8) is connected with a pressure transmitter (19).

9. A diaphragm rupture self-healing pressure regulator according to any one of claims 1 to 3, wherein: the blocking valve component (11) is a one-way valve which blocks the pressure of the recovery cavity I (8) from entering the recovery cavity II (9).

10. The diaphragm rupture self-repairing pressure regulator of claim 1, 2, 3, 5 or 6, wherein: the diaphragm assembly further comprises a bearing tray (20), the bearing tray (20) is located below the diaphragm (4), the bearing tray (20) and the recovery tray (5) clamp the diaphragm (4), and the diaphragm (4) is fixed on the valve rod (3).

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