CN213146708U

CN213146708U - Automatic discharging device for tail end of steam heating pipe network

Info

Publication number: CN213146708U
Application number: CN202021095195.XU
Authority: CN
Inventors: 陈忠汉; 张勇; 石志俊; 段兴太; 黄丽; 雷沛
Original assignee: AVIC Shaanxi Aircraft Industry Group Corp Ltd
Current assignee: Shaanxi Aircraft Industry Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-05-07
Anticipated expiration: 2030-06-12

Abstract

The invention belongs to the technical field of power heat energy transmission, and relates to an automatic discharging device at the tail end of a steam heating pipe network. The problems that air and condensed water in a pipeline at the tail end of a pipe network are quickly discharged, time and labor are wasted, maintenance is difficult, production energy is influenced and the like during operation of a steam pipe network are solved. The automatic discharging device at the tail end of the steam heating pipe network operates automatically, manual participation is not needed, a large amount of manpower and material resources are saved, the device has high-efficiency reliability and safety, the operation requirement of the steam pipe network is met, and production and heating steam supply are guaranteed.

Description

Automatic discharging device for tail end of steam heating pipe network

Technical Field

The invention belongs to the technical field of power heat energy transmission, and relates to an automatic discharging device for condensed water at the tail end of a steam heating pipe network.

Background

The steam boiler house is mainly used for producing and supplying heating steam, and the steam boiler is discontinuously operated due to the particularity of steam use in local areas and factories and supplies steam according to energy consumption requirements. When the steam is conveyed and supplied, the air and the condensed water in the steam pipe network are gathered and concentrated to the tail end of the steam pipe along the steam pipe under the thrust of the steam. The longer the steam pipe network, the bigger the temperature difference, the more sound the drainage is started, the more the pipeline is not started, the more the condensate water can be accumulated in the tail end of the steam pipeline, the less the condensate water is discharged in time, the less smooth the steam delivery is caused, and simultaneously, the water hammer, the vibration and the accompanying huge noise occur in the pipeline at the tail end of the steam pipeline by the steam-water mixture under the thrust of the steam. When original steam is conveyed, an operator needs to advance 20 minutes to manually open a valve to drain water and exhaust steam from a discharge well at the tail end of a steam pipeline until condensed water is drained and part of steam is discharged. Every time the steam delivery and supply are started, the discharge valve at the tail end of the steam pipeline needs to be manually opened and closed, and the discharge effect is judged by an operator. As the factory building of a company is expanded in recent years, the number of tail end discharge points of a steam pipeline is increased, time and labor are wasted when the steam pipeline is manually opened and closed, the reliability is poor, a large amount of steam is often leaked, the tail end pipeline of the steam pipeline is damaged by a water hammer, and the steam needs to be stopped for maintenance in time, so that the normal production and the heating energy are affected.

Disclosure of Invention

The invention solves the problems that the quick discharge of air and condensed water in the pipeline at the tail end of the steam pipe network wastes time and labor when the steam pipe network is started and operated, the discharge effect is judged by operators, the maintenance is complex, the production energy is influenced, and the like. The automatic discharging device at the tail end of the steam heating pipe network operates automatically, and the discharging effect is scientifically judged by the numerical value set by the temperature sensor. Need not artifical the participation, saved a large amount of manpower, material resources, the device efficient reliability, security have satisfied steam pipe network operation demand, guarantee production and heating steam supply.

Technical scheme

The utility model provides a steam heating pipe network end automatic discharging equipment, includes electric switch valve 1, manual valve 2, delivery pipe 3, water collector 5, temperature sensor 8, automatic control case 9, signal line 10, power cord 12. The device is arranged at the tail end of a main steam pipeline.

As shown in fig. 1: a temperature sensor 8 is arranged at the tail end of a heating main pipeline pipe network along the medium flow direction and is led to an automatic control box 9 by a signal wire 10, a water collecting pipe 6 is arranged behind the temperature sensor 8, a water collector 5 is arranged at the lower end of the water collecting pipe 6, and condensed water collected by the water collector 5 enters a return water main pipeline through a discharge pipe 3; an electric switch valve 1 is arranged on the discharge pipe 3, and a power cord 12 is led to the automatic control box 9 by the electric switch valve 1.

The temperature sensors 8 are arranged in parallel and are led to an automatic control box 9 by a signal wire 10.

The manual bypass valve 2 is connected with the electric switch valve 1 in parallel, and condensed water is discharged to a return water main pipeline through another discharge pipe 3.

The material of the discharge pipe 3 is seamless steel pipe.

The pipe diameter of the discharge pipe 3 is smaller than that of the return water main pipe and the heating main pipe.

The water collector 5 is made of seamless steel pipes which are 2 specifications smaller than the heating main pipeline. And a drain valve is arranged at the bottom of the water collector 5, so that rust and impurities in the pipeline can be conveniently removed.

The electric switch valve 1 and the bypass manual valve 2 are arranged as 1-by-1, and the manual valve 2 is used for controlling when the electric switch valve 1 fails.

Technical effects

The invention provides an automatic discharge device for the tail end of a pipe network. The device is improved in 2014 and operated for more than six years, and the steam pipe network saves a large amount of manpower and material resources by adopting the automatic discharging device at the tail end of the steam heat supply pipe network, so that the operation faults of the pipe network are reduced. The device has high-efficiency reliability and safety, meets the operation requirement of a steam pipe network, and ensures production and heating steam supply.

Need 2 full-time operating personnel before the transformation, steam heating pipe network end discharges the effect and is judged by operating personnel, and the emission time is 10-20 minutes, because of damage failures such as steam conduit water hammer production pipeline support, expansion bend more than 4 times every year, seriously influences company's production, for the steam of heating. 1 part of operators after transformation, and the discharge effect is scientifically judged by the set value of the temperature sensor. The steam pipeline does not generate water hammer, pipeline bracket, expansion piece and other damage phenomena. The automatic discharging device at the tail end of the steam heating pipe network is patrolled and checked by operators at regular time every day, so that the safe and reliable operation of the steam pipe network is effectively guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention wherein: the automatic water-saving device comprises an electric switch valve 1, a manual valve 2, a discharge pipe 3, a water collector 5, a temperature sensor 8, an automatic control box 9, a signal wire 10 and a power wire 12.

Detailed Description

The device is described in detail with reference to the attached drawings:

the center of the lower part of the position 1 meter away from the tail end of the heating main pipeline is vertically provided with a water collecting pipe, the lower end of the water collecting pipe is provided with a water collector, and the water collector is made of seamless steel pipes which are 2 specifications smaller than the heating main pipeline. A drain valve is arranged at the bottom of the water collector, and condensed water collected by the water collector enters a return water main pipeline through a discharge pipe; 2 discharge pipes are respectively arranged at the position of 0.5 meter at the tail end of the heating main pipeline and connected with a return water main pipeline. An automatic electric switch valve is arranged on one discharge pipe, and a power line is led to the automatic control box; and a bypass manual valve is arranged on the other discharge pipe. The electric switch valve and the manual valve are 1-by-1, and the manual valve is used for controlling only when the electric switch valve fails. 2 groups of plug-in temperature sensors a and b are installed at the upper position of 2 meters at the tail end of the pipeline, and the plug-in depth is 1/3 of the inner diameter of the heating main pipeline. The mixed gas of steam and air enters a return water main pipeline through the discharge pipes a and b. The automatic control system controls the opening and closing of the electric valve according to the temperature sensor. The system is controlled by a PLC, and the setting, the display and the control of related parameters are finished by a touch screen. The design provides two working modes of automatic mode and manual mode.

The operation working procedure is as follows: when the temperature is less than 80 ℃, the system considers that condensed water exists in the pipeline, the system starts the electric switch valve to perform drainage work, when the temperature in the pipeline rises to be more than 105 ℃, steam is determined in the pipeline, the system closes the electric switch valve, and the steam is blocked from escaping in time. The temperature sensor adopts redundant configuration to ensure the reliable operation of the system. Manual valves are used only in maintenance or emergency situations.

Working process

When the steam main heating pipeline supplies steam to start, the mixed gas of steam and air and condensed water along the way move in the main heating pipeline according to the arrow flow direction. Condensed water along the pipeline enters a return water main pipeline through a water collecting pipe, a water collector and a discharge pipe. The mixed gas of steam and air enters a return water main pipeline through an electric switch valve and a discharge pipe. The automatic control box sets the switch fixed value of the electric switch valve, and the 2 groups of temperature sensors respectively set the normal switch value and the abnormal overtemperature switch value. When the temperature detected by the group 1 temperature sensor is lower than 80 ℃, the electric switch valve is in an opening state; when the temperature sensor detects that the temperature reaches 105 ℃, the electric switch valve is in a closed state; when the temperature detected by the group 2 temperature is lower than 70 ℃, the electric valve is in an opening state; when the temperature sensor detects that the temperature reaches 110 ℃, the electric valve is in a closed state and gives an alarm. The device adopts PLC management and control, and the setting, the demonstration of relevant parameter, control are accomplished by the touch-sensitive screen. The device design provides both automatic/manual modes. When the electric switch valve is in failure and needs to be maintained, the manual valve is used for controlling the discharge.

Claims

1. The utility model provides a terminal automatic discharging equipment of steam heating pipe network which characterized in that: comprises an electric switch valve (1), a manual valve (2), a discharge pipe (3), a water collector (5), a temperature sensor (8), an automatic control box (9), a signal wire (10) and a power wire (12); the device is arranged at the tail end of a main steam pipeline; a temperature sensor (8) is arranged at the tail end of a pipe network of a heating main pipe along the medium flow direction, and is guided to an automatic control box (9) by a signal line (10), a water collecting pipe (6) is arranged behind the temperature sensor (8), a water collector (5) is arranged at the lower end of the water collecting pipe (6), and condensed water collected by the water collector (5) enters a return water main pipe through a discharge pipe (3); an electric switch valve (1) is installed on the discharge pipe (3), and a power wire (12) is led to the automatic control box (9) by the electric switch valve (1).

2. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: the temperature sensors (8) are arranged in parallel and are led to the automatic control box (9) by signal wires (10).

3. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: the manual bypass valve (2) is connected with the electric switch valve (1) in parallel, and condensed water is discharged to a return water main pipeline through another discharge pipe (3).

4. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: the material of the discharge pipe (3) is a seamless steel pipe.

5. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: the pipe diameter of the discharge pipe (3) is smaller than the pipe diameters of the return water main pipeline and the heating main pipeline.

6. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: the water collector (5) is made of seamless steel pipes which are 2 specifications smaller than the heating main pipeline.

7. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: a drain valve is arranged at the bottom of the water collector (5).

8. The automatic discharging device for the tail end of the steam heating pipe network according to claim 1, wherein: the electric switch valve (1) and the bypass manual valve (2) are arranged as 1-by-1.