A natural gas pipeline internal fluid monitoring pressure regulating device

Abstract

The application relates to a natural gas pipeline fluid monitoring pressure regulating device. The device comprises a gas inlet pipe, a monitoring component, an adapter pipe, a pressure regulating component and a gas outlet pipe which are sequentially connected, the monitoring component comprises a monitoring commander and a monitoring valve, the pressure regulating component comprises a pressure regulating commander and a pressure regulating valve, the gas inlet pipe, a first adjusting plate, the adapter pipe, a second adjusting plate and the gas outlet pipe are sequentially communicated to form a through flow cavity, the monitoring commander and the pressure regulating commander are consistent in structure and are separated into upper and lower end portions through a dynamic diaphragm. The monitoring valve is additionally arranged in front of the pressure regulating valve, the set pressure of the monitoring valve is slightly higher than that of the pressure regulating valve, the set pressure of the monitoring valve is higher than the pressure of the gas outlet pipe, so the monitoring valve is in a fully open state, and the pressure regulating valve can keep working through the monitoring valve after the downstream pressure is increased due to the pressure regulating valve failure.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of natural gas pipeline monitoring, and particularly relates to a natural gas pipeline internal fluid monitoring and pressure regulating device. BACKGROUND

[0002] Natural gas, as an important clean energy, plays an increasingly important role in modern society. Natural gas pipelines, as the main transportation method, have the advantages of low leakage, low pollution and high efficiency. However, during pipeline transportation, the control of fluid pressure, flow and other parameters is crucial to ensure transportation safety and efficiency.

[0003] Natural gas is flammable and explosive, and if the fluid pressure in the pipeline is too high or too low, it may cause safety accidents. Therefore, real-time monitoring of the fluid in the pipeline is needed, and pressure regulation is needed according to the needs to ensure transportation safety. In natural gas pipeline transportation, the pressure of the fluid directly affects its transportation efficiency. Through monitoring and pressure regulation, the fluid can be ensured to run at the optimal pressure in the pipeline, thereby improving the transportation efficiency.

[0004] The pressure regulating valve is a common pressure regulating device in natural gas pipelines, and its basic principle is to use the regulating function of the valve to control the flow and pressure of the gas by adjusting the opening of the valve. However, in actual application, when the simple pressure regulating valve fails, the downstream will stop supplying gas due to the interruption of the failure, and during the repair period, it will cause energy supply interruption and cause economic and property losses. SUMMARY

[0005] To solve the above technical problems, the application provides a natural gas pipeline internal fluid monitoring and pressure regulating device, which adds a monitoring valve before the pressure regulating valve, and the set pressure of the monitoring valve is slightly higher than that of the pressure regulating valve. Since the set pressure of the monitoring valve is higher than the pressure of the outlet pipe, the monitoring valve is in full open state, ensuring that the pressure regulating valve can work through the monitoring valve when the downstream pressure increases due to failure.

[0006] To achieve the above purpose, the technical solution adopted by the application is:

[0007] The natural gas pipeline fluid monitoring pressure regulating device comprises a gas inlet pipe, a monitoring component, an adapter pipe, a pressure regulating component and a gas outlet pipe connected in sequence, the monitoring component comprises a monitoring commander and a monitoring valve, the monitoring valve is provided with a first adjusting plate, and the left and right ends of the first adjusting plate are respectively provided with a first left cavity and a first right cavity; the pressure regulating component comprises a pressure regulating commander and a pressure regulating valve, the pressure regulating valve is provided with a second adjusting plate, and the left and right ends of the second adjusting plate are respectively provided with a second left cavity and a second right cavity; the gas inlet pipe, the first adjusting plate, the adapter pipe, the second adjusting plate and the gas outlet pipe are sequentially communicated to form a through flow guide cavity; the monitoring commander and the pressure regulating commander are consistent in structure and are divided into upper end parts and lower end parts by a dynamic diaphragm; a first pipe provided on the gas outlet pipe is respectively communicated with the lower end parts in the monitoring commander and the pressure regulating commander, a second pipe on the gas outlet pipe is respectively connected to the upper end part of the pressure regulating commander and the second left cavity, and a third pipe on the gas outlet pipe is respectively connected to the upper end part of the monitoring commander and the first left cavity; a fourth pipe on the gas inlet pipe sequentially penetrates the upper end part of the monitoring commander and is connected to the first right cavity, and a fifth pipe on the adapter pipe sequentially penetrates the upper end part of the pressure regulating commander and is connected to the second right cavity.

[0008] The monitoring commander and the pressure regulating commander both comprise a pressure stabilizing part, a detection part and a pressure regulating part, the pressure stabilizing part and the pressure regulating part are arranged in the upper end part and respectively abut against the detection part of the lower end part through a dynamic diaphragm; the pressure stabilizing part is provided with a push plate connected with the dynamic diaphragm, the push plate of the monitoring commander is communicated with the fourth pipe, and the push plate of the pressure regulating commander is communicated with the fifth pipe; the detection part is provided with a first spring, the lower end of the first spring abuts against the push plate and the dynamic diaphragm, the detection parts of the monitoring commander and the pressure regulating commander are communicated with each other and connected to the first pipe; the pressure regulating part comprises an adjusting stud, an adjusting diaphragm, an adjusting pressure rod and an adjusting cavity, the adjusting stud penetrates the pressure regulating part from top to bottom and abuts against the adjusting diaphragm, the lower end of the adjusting pressure rod abutting against the lower end of the adjusting diaphragm penetrates into the adjusting cavity, one end of the adjusting cavity is communicated with the push plate in the pressure stabilizing part, the other end of the adjusting cavity of the monitoring commander is connected to the first right cavity, and the other end of the adjusting cavity of the pressure regulating commander is connected to the second right cavity; the pressure regulating part further comprises a top pressing plate and a second spring, the upper end of the second spring is connected with the top pressing plate, the lower end of the second spring is connected with the adjusting diaphragm, and the lower end of the adjusting stud abuts against the top pressing plate; the pressure regulating part further comprises a balance cavity and a balance stud, the balance cavity is communicated with the adjusting cavity, the balance stud penetrates from outside the adjusting part and is arranged between the connection of the balance cavity and the adjusting cavity and separates the balance cavity and the adjusting cavity, and the balance cavities of the monitoring commander are respectively connected to the first left cavity and the third pipe, and the balance cavities of the pressure regulating commander are respectively connected to the second left cavity and the second pipe.

[0009] The natural gas pipeline fluid monitoring pressure regulating device adopts the structure, the natural gas entering the inlet pipe, the fourth pipeline on the natural gas enters the push plate of the monitoring commander, the natural gas pressure in the inlet pipe pushes the push plate, the hydraulic pressure in the push plate is kept in communication with the first right cavity, the first left cavity is connected to the outlet pipe through the third pipeline, the first pipeline of the inlet pipe is connected to the detection part of the monitoring commander, the dynamic diaphragm is pressed against the push plate under the auxiliary force of the first spring, the dynamic balance is formed on the detection part and the pressure stabilizing part and the push plate, therefore, when the pressure in the outlet pipe changes, the pressure acts on the first left cavity, thereby adjusting the first adjusting plate to regulate the outlet of the monitoring valve; the natural gas enters the pressure regulating valve through the monitoring valve and the adapter pipe, the fifth pipeline on the adapter pipe is connected to the push plate of the pressure regulating commander, the natural gas pressure in the adapter pipe pushes the push plate, the hydraulic pressure in the push plate is kept in communication with the second right cavity, the second left cavity is connected to the outlet pipe through the second pipeline, the first pipeline of the inlet pipe is connected to the detection part of the pressure regulating commander, the dynamic diaphragm is pressed against the push plate under the auxiliary force of the first spring, the dynamic balance is formed on the detection part and the pressure stabilizing part and the push plate, therefore, when the pressure in the outlet pipe changes, the pressure acts on the second left cavity, thereby adjusting the second adjusting plate to regulate the outlet of the pressure regulating valve. In order to ensure that the pressure regulating valve plays a role in pressure regulation during daily work, the monitoring valve plays a role in secondary monitoring, when the pressure regulating valve fails to lose the regulating ability, the monitoring valve is intervened to ensure continuous supply of natural gas, therefore, the adjusting screw in the monitoring commander is screwed to change the pressure of the adjusting diaphragm by the second spring, the pressure is slightly higher than that of the pressure regulating commander, therefore, the dynamic change of the pressure in the outlet pipe will act on the pressure regulating valve for regulation, and the monitoring commander with higher pressure keeps the gas pressure of the inlet pipe and the adapter pipe smooth, when the pressure regulating valve fails to lose the regulating ability, the monitoring valve is intervened to ensure normal pressure regulation of the natural gas pipe, and to ensure continuous supply of natural gas.

[0010] Further, the third spring is arranged in the first left cavity, and the first adjusting plate is opened and closed by the force of the third spring; the fourth spring is arranged in the second left cavity, and the second adjusting plate is opened and closed by the force of the fourth spring.

[0011] Compared with the prior art, the adjusting screw in the monitoring commander is screwed to change the pressure of the adjusting diaphragm by the second spring, the pressure is slightly higher than that of the pressure regulating commander, therefore, the dynamic change of the pressure in the outlet pipe will act on the pressure regulating valve for regulation, and the monitoring commander with higher pressure keeps the gas pressure of the inlet pipe and the adapter pipe smooth, when the pressure regulating valve fails to lose the regulating ability, the monitoring valve is intervened to ensure normal pressure regulation of the natural gas pipe, and to ensure continuous supply of natural gas. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings for describing the embodiments or the technical solutions of the prior art in the embodiments or the prior art will be briefly described. Obviously, the drawings described below only show some of the embodiments of the present application, and all other drawings obtained by a person of ordinary skill in the art without creative effort based on these drawings belong to the protection scope of the present application.

[0013] Figure 1 is a schematic view of the present application;

[0014] Figure 2 is a schematic view of the present application Figure 1 is a local enlarged view of A of the present application;

[0015] Figure 3 is a local enlarged view of B of the present application; Figure 1 is a local enlarged view of C of the present application.

[0016] Figure 4 is a local enlarged view of C of the present application. Figure 1

[0017] Wherein: 1, air inlet pipe; 11, fourth pipeline; 2, monitoring assembly; 21, monitoring commander; 22, monitoring valve; 221, first adjusting plate; 222, first left cavity; 2221, third spring; 223, first right cavity; 23, dynamic diaphragm; 231, upper end; 232, lower end; 233, pressure stabilizing part; 2331, pushing plate; 234, detecting part; 2341, first spring; 235, pressure regulating part; 2351, adjusting stud; 2352, adjusting diaphragm; 2353, adjusting pressure rod; 2354, adjusting cavity; 2355, top pressing plate; 2356, second spring; 2357, balance cavity; 2358, balance stud; 4, pressure regulating assembly; 41, pressure regulating commander; 42, pressure regulating valve; 421, second adjusting plate; 422, second left cavity; 4221, fourth spring; 423, second right cavity; 5, air outlet pipe; 51, first pipeline; 52, second pipeline; 53, third pipeline. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0019] The specific embodiments of the present application will be described below in combination with the drawings:

[0020] As​Figures 1-4 The natural gas pipeline fluid monitoring pressure regulating device shown, including the gas inlet pipe 1, monitoring components 2, adapter pipe, pressure regulating components 4 and gas outlet pipe 5 are connected in turn, the monitoring components 2 includes monitoring commander 21 and monitoring valve 22, the monitoring valve 22 is equipped with the first adjusting plate 221, the left and right ends of the first adjusting plate 221 are separately provided with first left cavity 222 and first right cavity 223;The pressure regulating components 4 includes pressure regulating commander 41 and pressure regulating valve 42, the pressure regulating valve 42 is equipped with the second adjusting plate 421, the left and right ends of the second adjusting plate 421 are separately provided with second left cavity 422 and second right cavity 423;The gas inlet pipe 1, the first adjusting plate 221, the adapter pipe, the second adjusting plate 421 and the gas outlet pipe 5 are sequentially communicated to form a through flow cavity;The monitoring commander 21 and the pressure regulating commander 41 are consistent in structure and are separated into upper end part 231 and lower end part 232 by dynamic diaphragm 23;The first pipeline 51 provided on the gas outlet pipe 5 is respectively communicated with the lower end part 232 in the monitoring commander 21 and the pressure regulating commander 41, the second pipeline 52 on the gas outlet pipe 5 is respectively connected into the upper end part 231 of the pressure regulating commander 41 and the second left cavity 422, the third pipeline 53 on the gas outlet pipe 5 is respectively connected into the upper end part 231 of the monitoring commander 21 and the first left cavity 222;The fourth pipeline 11 on the gas inlet pipe 1 sequentially penetrates the upper end part 231 of the monitoring commander 21 and is connected into the first right cavity 223, the fifth pipeline on the adapter pipe sequentially penetrates the upper end part 231 of the pressure regulating commander 41 and is connected into the second right cavity 423.

[0021] The monitoring commander 21 and the pressure regulating commander 41 both comprise a pressure stabilizing part 233, a detecting part 234 and a pressure regulating part 235, which are arranged in the upper end part 231 and abut against the detecting part 234 of the lower end part 232 through the dynamic diaphragm 23 respectively; the pressure stabilizing part 233 is provided with a push plate 2331 connected with the dynamic diaphragm 23, the push plate 2331 of the monitoring commander 21 communicates with the fourth pipeline 11, and the push plate 2331 of the pressure regulating commander 41 communicates with the fifth pipeline; the detecting part 234 is provided with a first spring 2341, which abuts against the lower end of the connecting part of the push plate 2331 and the dynamic diaphragm 23, and the detecting parts 234 of the monitoring commander 21 and the pressure regulating commander 41 communicate with each other and are connected with the first pipeline 51; the pressure regulating part 235 comprises an adjusting stud 2351, an adjusting diaphragm 2352, an adjusting pressure rod 2353 and an adjusting cavity 2354, the adjusting stud 2351 penetrates the pressure regulating part 235 from top to bottom and abuts against the adjusting diaphragm 2352, the lower end of the adjusting pressure rod 2353 abutting against the lower end of the adjusting diaphragm 2352 penetrates into the adjusting cavity 2354, one end of the adjusting cavity 2354 communicates with the push plate 2331 in the pressure stabilizing part 233, the other end of the adjusting cavity 2354 of the monitoring commander 21 is connected with the first right cavity 223, and the other end of the adjusting cavity 2354 of the pressure regulating commander 41 is connected with the second right cavity 423; the pressure regulating part 235 further comprises a top pressing plate 2355 and a second spring 2356, the upper end of the second spring 2356 is connected with the top pressing plate 2355, the lower end of the second spring 2356 is connected with the adjusting diaphragm 2352, and the lower end of the adjusting stud 2351 abuts against the top pressing plate 2355; the pressure regulating part 235 further comprises a balance cavity 2357 and a balance stud 2358, the balance cavity 2357 communicates with the adjusting cavity 2354, the balance stud 2358 penetrates from outside the adjusting part and is arranged between the connecting part of the balance cavity 2357 and the adjusting cavity 2354 and separates the balance cavity 2357 and the adjusting cavity 2354, and the balance cavity 2357 of the monitoring commander 21 is connected with the first left cavity 222 and the third pipeline 53 respectively, and the balance cavity 2357 of the pressure regulating commander 41 is connected with the second left cavity 422 and the second pipeline 52 respectively.

[0022] Further, the first left cavity 222 is provided with a third spring 2221, and the first adjusting plate 221 is opened and closed by the action force of the third spring 2221; the second left cavity 422 is provided with a fourth spring 4221, and the second adjusting plate 421 is opened and closed by the action force of the fourth spring 4221.

[0023] The working mode of the present application is described as follows:

[0024] The natural gas pipeline fluid monitoring pressure regulating device adopts the structure, the natural gas entering the inlet pipe 1, the fourth pipeline 11 on the natural gas is connected to the push plate 2331 of the monitoring commander 21, the natural gas pressure in the inlet pipe 1 will push the push plate 2331, so that the hydraulic pressure in the first right cavity 223 is kept, and the first left cavity 222 is connected to the outlet pipe 5 through the third pipeline 53, and the first pipeline 51 of the inlet pipe 1 is connected to the detection part 234 of the monitoring commander 21, the dynamic diaphragm 23 is pressed against the push plate 2331 under the auxiliary force of the first spring 2341, so that the dynamic balance is formed between the detection part 234 and the pressure stabilizing part 233 and the push plate 2331, therefore, when the pressure in the outlet pipe 5 changes, it will act on the first left cavity 222, so as to adjust the first adjusting plate 221 to adjust the outlet of the monitoring valve 22, and the first adjusting plate 221 is kept in abutment under the abutment force of the third spring 2221, once the monitoring commander 21 loses the adjustment ability, the first adjusting plate 221 can be sealed by the third spring 2221 to directly close the monitoring valve 22; the natural gas enters the pressure regulating valve 42 through the monitoring valve 22, the fifth pipeline on the adapter pipe is connected to the push plate 2331 of the pressure regulating commander 41, the natural gas pressure in the adapter pipe will push the push plate 2331, so that the hydraulic pressure in the second right cavity 423 is kept, and the second left cavity 422 is connected to the outlet pipe 5 through the second pipeline 52, and the first pipeline 51 of the inlet pipe 1 is connected to the detection part 234 of the pressure regulating commander 41, the dynamic diaphragm 23 is pressed against the push plate 2331 under the auxiliary force of the first spring 2341, so that the dynamic balance is formed between the detection part 234 and the pressure stabilizing part 233 and the push plate 2331, therefore, when the pressure in the outlet pipe 5 changes, it will act on the second left cavity 422, so as to adjust the second adjusting plate 421 to adjust the outlet of the pressure regulating valve 42, and the second adjusting plate 421 is kept in abutment under the abutment force of the fourth spring 4221, once the pressure regulating commander 41 loses the adjustment ability, the second adjusting plate 421 can be sealed by the fourth spring 4221 to directly close the pressure regulating valve 42.In order to ensure that the pressure regulating valve 42 plays a role in pressure regulating in the process of daily work, the monitoring valve 22 plays a role in secondary monitoring, and when the pressure regulating valve 42 loses the regulating ability, the natural gas is continuously supplied through the intervention of the monitoring valve 22, so that the adjusting screw 2351 in the monitoring commander 21 is screwed to change the pressure of the adjusting diaphragm 2352 by the second spring 2356 of the pressure plate 2355, so that the pressure of the adjusting diaphragm 2352 is slightly higher than the pressure of the pressure regulating commander 41, and thus the dynamic change of the pressure in the outlet pipe 5 will act on the pressure regulating valve 42 for regulation, and the monitoring commander 21 with higher pressure keeps the gas pressure of the inlet pipe 1 and the adapter pipe unobstructed, and when the pressure regulating valve 42 loses the regulating ability, the monitoring valve 22 intervenes to ensure the normal pressure regulating effect of the natural gas pipe and ensure that the natural gas will not be cut off.

[0025] The beneficial effects of the present application are that the adjusting screw 2351 in the monitoring commander 21 is screwed to change the pressure of the adjusting diaphragm 2352 by the second spring 2356 of the pressure plate 2355, so that the pressure of the adjusting diaphragm 2352 is slightly higher than the pressure of the pressure regulating commander 41, and thus the dynamic change of the pressure in the outlet pipe 5 will act on the pressure regulating valve 42 for regulation, and the monitoring commander 21 with higher pressure keeps the gas pressure of the inlet pipe 1 and the adapter pipe unobstructed, and when the pressure regulating valve 42 loses the regulating ability, the monitoring valve 22 intervenes to ensure the normal pressure regulating effect of the natural gas pipe and ensure that the natural gas will not be cut off.

[0026] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid monitoring pressure regulating device for use in a natural gas pipeline, comprising: The application relates to a gas monitoring and regulating device, which comprises a gas inlet pipe, a monitoring component, an adapter pipe, a pressure regulating component and a gas outlet pipe connected in sequence, wherein the monitoring component comprises a monitoring commander and a monitoring valve, the monitoring valve is internally provided with a first adjusting plate, and the left and right ends of the first adjusting plate are respectively provided with a first left cavity and a first right cavity; the pressure regulating component comprises a pressure regulating commander and a pressure regulating valve, the pressure regulating valve is internally provided with a second adjusting plate, and the left and right ends of the second adjusting plate are respectively provided with a second left cavity and a second right cavity; the gas inlet pipe, the first adjusting plate, the adapter pipe, the second adjusting plate and the gas outlet pipe are sequentially communicated to form a through flow cavity; the monitoring commander and the pressure regulating commander are consistent in structure and are separated into upper end parts and lower end parts through dynamic diaphragms; a first pipe on the gas outlet pipe is respectively communicated with the lower end parts in the monitoring commander and the pressure regulating commander, a second pipe on the gas outlet pipe is respectively connected into the upper end part of the pressure regulating commander and the second left cavity, and a third pipe on the gas outlet pipe is respectively connected into the upper end part of the monitoring commander and the first left cavity; a fourth pipe on the gas inlet pipe sequentially penetrates the upper end part of the monitoring commander and is connected into the first right cavity, a fifth pipe on the adapter pipe sequentially penetrates the upper end part of the pressure regulating commander and is connected into the second right cavity, and the monitoring commander and the pressure regulating commander both comprise a pressure stabilizing part, a detecting part and a pressure regulating part; the pressure stabilizing part and the pressure regulating part are arranged in the upper end part and respectively abut against the detecting part of the lower end part through dynamic diaphragms, the pressure stabilizing part is internally provided with a push plate connected with the dynamic diaphragm, the push plate of the monitoring commander is communicated with the fourth pipe, and the push plate of the pressure regulating commander is communicated with the fifth pipe; the detecting part is internally provided with a first spring, the first spring abuts against the lower end of the push plate connected with the dynamic diaphragm, and the detecting parts of the monitoring commander and the pressure regulating commander are communicated with each other and connected into the first pipe; the pressure regulating part comprises an adjusting screw column, an adjusting diaphragm, an adjusting pressure rod and an adjusting cavity, the adjusting screw column penetrates the pressure regulating part from top to bottom and abuts against the adjusting diaphragm, the lower end of the adjusting pressure rod abutting against the lower end of the adjusting diaphragm penetrates into the adjusting cavity, one end of the adjusting cavity is communicated with the push plate in the pressure stabilizing part, the other end of the adjusting cavity of the monitoring commander is connected into the first right cavity, and the other end of the adjusting cavity of the pressure regulating commander is connected into the second right cavity; the pressure regulating part further comprises a top pressing plate and a second spring, the upper end of the second spring is connected with the top pressing plate, the lower end of the second spring is connected with the adjusting diaphragm, and the lower end of the adjusting screw column abuts against the top pressing plate; the pressure regulating part further comprises a balance cavity and a balance screw column, the balance cavity is communicated with the adjusting cavity, the balance screw column penetrates from outside the adjusting part and is arranged between the connection positions of the balance cavity and the adjusting cavity and separates the balance cavity from the adjusting cavity, and the balance cavities of the monitoring commander are respectively connected into the first left cavity and the third pipe, and the balance cavities of the pressure regulating commander are respectively connected into the second left cavity and the second pipe.

2. The natural gas pipeline in-line fluid monitoring regulator of claim 1, wherein: The first left cavity is internally provided with a third spring, and the first adjusting plate opens and closes the monitoring valve through the action force of the third spring.

3. The natural gas pipeline in-line fluid monitoring regulator of claim 1, wherein: The second left cavity is internally provided with a fourth spring, and the second adjusting plate opens and closes the pressure regulating valve through the action force of the fourth spring.

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