CN217024454U

CN217024454U - Pilot-operated type air-supplementing ash conveying system

Info

Publication number: CN217024454U
Application number: CN202220714084.5U
Authority: CN
Inventors: 王章生; 凌海
Original assignee: Haining Shichuang Fluid Control Equipment Co ltd; Yiqing Environmental Technology Co ltd
Current assignee: Haining Shichuang Fluid Control Equipment Co ltd; Yiqing Environmental Technology Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-22
Anticipated expiration: 2032-03-29

Abstract

The utility model discloses a pilot-operated air-supplementing ash conveying system which comprises a pilot-operated ash conveying valve, an ash conveying pipeline and a compressed air pipeline, wherein a plurality of ash conveying valves are arranged between the ash conveying pipeline and the compressed air pipeline in parallel, the ash conveying pipeline is communicated with valve outlets of the ash conveying valves through a plurality of branch channels, check valves are arranged on the branch channels, and the compressed air pipeline is communicated with valve inlets of the ash conveying valves through a plurality of air inlet branch pipes; the signal port A of the front ash conveying valve is communicated with the signal port B of the adjacent rear ash conveying valve through a pipeline, the signal port B of the first ash conveying valve is blocked, and the signal port A of the last ash conveying valve is blocked. The utility model has compact layout and convenient and quick use, can accurately position the blocking position, completely sweeps the blocking point through compressed air, triggers the valve in front of a new blocking point to work when transferring, and circularly sweeps so as to ensure the smoothness of an ash conveying pipeline, avoid the entrance of large air volume, reduce the abrasion of the pipeline and prolong the service life of the pipeline.

Description

Pilot-operated type air-supplementing ash conveying system

Technical Field

The utility model relates to the technical field of ash conveying systems for thermal power plants, in particular to a pilot type air supplementing and ash conveying system.

Background

The pneumatic ash conveying system of the thermal power plant generally conveys high-concentration materials by static pressure and dynamic pressure of compressed air according to the pneumatic conveying principle of gas-solid two-phase flow. The ash conveying mode has the problems of pipe blockage, abrasion and high air consumption, particularly the problem of pipe blockage, ash in an ash hopper can be accumulated if the pipe blockage is not processed in time, the temperature can be further reduced along with the flowing difference of the ash, and the accumulation of ash materials is aggravated. The existing method is to pressurize and compress air on an ash conveying pipeline to supplement air and convey ash. The position of the pipeline blockage is uncertain, the air pressure is insufficient, the air consumption is large, the air quantity in the ash conveying pipeline is increased, and the excessive air quantity can cause the abrasion of the ash conveying pipeline. Generally speaking, the traditional pilot-operated air-supplementing and ash-conveying system continuously inputs compressed air into a pipeline, and if the pipeline is blocked, the air in the pipeline is pressurized to dredge dust at the blocked position; if the pipeline is not blocked, compressed air is continuously input, so that the air consumption is wasted and the abrasion of the conveying pipeline can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pilot-operated type air-supplementing ash conveying system, which solves the problems of pipe blockage, abrasion and high air consumption of the traditional pneumatic ash conveying.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a pilot-operated air-supplementing ash conveying system, which comprises a pilot-operated ash conveying valve, an ash conveying pipeline and a compressed air pipeline, wherein a plurality of ash conveying valves are arranged between the ash conveying pipeline and the compressed air pipeline in parallel, the ash conveying pipeline is communicated with a valve outlet of the ash conveying valve through a plurality of branch channels, check valves are arranged on the branch channels, and the compressed air pipeline is communicated with a valve inlet of the ash conveying valve through a plurality of air inlet branch pipes; the signal port A of the front ash conveying valve is communicated with the signal port B of the adjacent rear ash conveying valve through a pipeline, the signal port B of the first ash conveying valve is blocked, and the signal port A of the last ash conveying valve is blocked.

Further, the distance between every two adjacent ash conveying valves is not more than 2 meters, the ash conveying valves are sequentially numbered from a first valve, a second valve, a third valve, a fourth valve, a fifth valve to an n valve, and the serial number of the n valve is set according to the total length of the ash conveying pipeline.

Furthermore, when the ash conveying pipeline between the first valve and the second valve is not blocked, the forces in the two membrane covers of the first valve are equal, the valve core is pressed on the valve outlet under the action of the spring pressing force and is in a closed state, and the first valve and the second valve are in a stop working state; when the ash conveying pipeline between the first valve and the second valve is blocked, pressure difference can occur in the upper membrane cover and the lower membrane cover of the first valve, the valve core is lifted to be far away from the valve outlet by the pressure difference and is in an open state, the first valve starts to enter a working state, and air supplies compressed air to the front end of the blocking point through the compressed air pipeline through the air inlet branch pipe, the valve inlet, the valve outlet and the check valve and dredges the pipeline.

Further, the pilot-operated ash conveying valve comprises a valve core and a valve body, the valve core is arranged in an inner cavity of the valve body in a telescopic mode, a lower membrane cover is connected to the top surface of the valve body, an upper membrane cover is arranged above the lower membrane cover, the lower membrane cover and the upper membrane cover are connected to form a hollow cavity, a rubber membrane is connected to the center of the hollow cavity, the upper side of the rubber membrane is connected with a limiting plate through a spring, a limiting screw is arranged above the limiting plate, and a screw rod of the limiting screw penetrates through a threaded hole of the upper membrane cover and abuts against the top surface of the limiting plate; the upper end face of the valve core is bonded with the rubber diaphragm, the valve inlet is arranged on one side face of the valve body and communicated with the inner cavity of the valve body, the valve outlet is arranged on the bottom face of the valve body and communicated with the inner cavity of the valve body, the lower diaphragm cover is communicated with the valve outlet through an inner communicating pipeline, and the valve inlet is communicated with the valve outlet through a throttling channel.

Furthermore, the signal port A is arranged on one side of the top surface of the upper membrane cover, the signal port B is arranged on one side of the bottom surface of the lower membrane cover, and the signal port A corresponds to the signal port B up and down.

Furthermore, the periphery of the rubber diaphragm is tightly pressed and connected on the matching edges of the lower diaphragm cover and the upper diaphragm cover, and the rubber diaphragm divides the hollow cavity into an upper part and a lower part.

Furthermore, two ends of the spring are positioned and connected on the opposite surfaces of the rubber diaphragm and the limiting plate.

Furthermore, the valve core is formed by connecting a straight rod and a blocking head, the side wall of the bottom of the blocking head is a conical surface, and the conical surface is tightly pressed on the valve outlet.

Compared with the prior art, the utility model has the beneficial technical effects that:

the utility model relates to a pilot-operated air-supplementing ash conveying system which comprises a pilot-operated ash conveying valve, an ash conveying pipeline and a compressed air pipeline, wherein a plurality of ash conveying valves are arranged between the ash conveying pipeline and the compressed air pipeline in parallel, a signal port A of one ash conveying valve in the front is communicated with a signal port B of one adjacent ash conveying valve in the back through a pipeline, the signal port B of the ash conveying valve in the head is blocked, and the signal port A of the ash conveying valve in the tail is blocked; the number of the ash conveying valves is sequentially from a first valve, a second valve, a third valve, a fourth valve, a fifth valve to a n valve, and the number of the n valve is set according to the total length of the ash conveying pipeline; when the valve works, taking the first valve and the second valve as examples, when an ash conveying pipeline between the first valve and the second valve is not blocked, the forces in two membrane covers of the first valve are equal, the valve core is pressed on the valve outlet under the action of the spring pressing force and is in a closed state, and the first valve and the second valve are in a stop working state; when the ash conveying pipeline between the first valve and the second valve is blocked, pressure difference can occur in the upper membrane cover and the lower membrane cover of the first valve, the valve core is lifted away from the valve outlet by the pressure difference and is in an open state, the first valve starts to enter a working state, and air supplies compressed air to the front end of a blocking point through the compressed air pipeline through the air inlet branch pipe, the valve inlet, the valve outlet and the check valve and dredges the pipeline.

1) The positioning accuracy of the ash conveying blockage part is as follows: compare with the defeated grey system of traditional pipeline, can accurate location block up the position, take place to block up in the defeated grey pipeline that is not more than 2 meters between the adjacent defeated grey valve, the first valve of jam point begins work, blows in defeated grey pipeline with compressed air, carries out the mediation action. If the blockage point does not disappear from the side bottom after the last compressed air purging, but is transferred, a valve in front of the new blockage point is triggered to work, and the circulating purging is carried out in such a way, so that the smoothness of the ash conveying pipeline is ensured.

2) The timeliness of removing the ash conveying blockage is greatly improved, the system automatically works according to the air pressure difference, the automatic monitoring and removing of the pipeline blockage can be realized, and manual inspection operation is not needed.

3) The service life of the pipeline is prolonged by energy conservation and emission reduction, only the ash conveying valve at the front position of the pipeline blockage position is in a working state, and the ash conveying valves at other positions are in a silent state, so that unnecessary compressed air waste is reduced, meanwhile, the abrasion of the pipeline caused by excessive air is reduced, and the service life of the pipeline is prolonged.

The utility model has compact layout and convenient and fast use, can accurately position the blocking position by introducing a plurality of guide type ash conveying valves, completely sweeps the blocking point through compressed air, triggers a valve in front of a new blocking point to work when transferring occurs, circularly sweeps to ensure the smoothness of an ash conveying pipeline, avoids the entry of large air quantity, reduces the abrasion of the pipeline and prolongs the service life of the pipeline.

Drawings

The utility model is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic diagram of the operation of the pilot-operated air-supplying and ash-transporting system of the present invention;

FIG. 2 is a structural view of an ash conveying valve of the present invention;

description of the reference numerals: 1-a valve core; 2-a valve body; 3-a rubber diaphragm; 4-lower membrane cover; 5-covering the membrane; 6-a spring; 7-a limit screw; 8-signal port A; 9-signal port B; 10-valve inlet; 11-a throttling channel; 12-valve outlet; 13-a check valve; 14-ash conveying pipeline; 15-internal communication ducts; 16-compressed air pipes;

100-ash conveying valve; 101-valve number one; 102-valve number two; 103-valve number three; valve number 104-four; 105-valve five.

Detailed Description

As shown in fig. 1-2, a pilot-operated air-supplying ash-conveying system comprises a pilot-operated ash-conveying valve 100, an ash-conveying pipeline 14 and a compressed air pipeline 16, wherein a plurality of ash-conveying valves 100 are installed in parallel between the ash-conveying pipeline 14 and the compressed air pipeline 16, the ash-conveying pipeline 14 is communicated with a valve outlet 12 of the ash-conveying valve 100 through a plurality of sub-channels, check valves 13 are installed on the sub-channels, and the compressed air pipeline 16 is communicated with a valve inlet 10 of the ash-conveying valve 100 through a plurality of air inlet branch pipes; the signal port A8 of the front ash conveying valve 100 is communicated with the signal port B9 of the adjacent rear ash conveying valve 100 through a pipeline, the signal port B9 of the first ash conveying valve 100 is blocked, and the signal port A8 of the last ash conveying valve 100 is blocked.

The distance between two adjacent ash conveying valves 100 is not more than 2 meters, the number of the ash conveying valves 100 is sequentially from a first valve 101, a second valve 102, a third valve 103, a fourth valve 104, a fifth valve 105 to a n valve, and the number of the n valve is set according to the total length of the ash conveying pipeline 14.

During operation, when the ash conveying pipeline 14 between the first valve 101 and the second valve 102 is not blocked, the forces in the two film covers of the first valve 101 are equal, the valve core 1 is pressed on the valve outlet 12 under the action of the pressing force of the spring 6 and is in a closed state, and the first valve 101 and the second valve 102 are in a stop working state; when the ash conveying pipeline 14 between the first valve 101 and the second valve 102 is blocked, a pressure difference occurs in the upper membrane cover and the lower membrane cover of the first valve 101, the valve core is lifted away from the valve outlet 12 by the pressure difference and is in an open state, the first valve 101 starts to enter a working state, and air supplies compressed air to the front end of the blocking point through the compressed air pipeline 16 via the air inlet branch pipe, the valve inlet 10, the valve outlet 12 and the check valve 13 and dredges the pipeline. Other locations are blocked in the same manner as the blockage point clearing described above. Specifically, if the blockage point does not disappear from the side bottom after the last compressed air purging, but is transferred, a valve in front of a new blockage point is triggered to work, and the circulating purging is carried out in such a way, so that the smoothness of the ash conveying pipeline is ensured. The system only has the ash conveying valve in the working state before the pipeline blockage position and has the ash conveying valves in other positions in the silent state, so that unnecessary waste of compressed air is reduced, meanwhile, the abrasion of the pipeline caused by excessive air volume is reduced, and the service life of the pipeline is prolonged.

Specifically, as shown in fig. 2, the pilot-operated ash valve 100 includes a valve core 1 and a valve body 2, the valve core 1 is telescopically arranged in an inner cavity of the valve body 2, a lower membrane cover 4 is connected to a top surface of the valve body 2, an upper membrane cover 5 is arranged above the lower membrane cover 4, the lower membrane cover 4 and the upper membrane cover 5 are connected to form a hollow cavity, a rubber membrane 3 is connected to a central position of the hollow cavity, the upper side of the rubber membrane 3 is connected to a limiting plate through a spring 6, a limit screw 7 is arranged above the limiting plate, and a screw of the limit screw 7 penetrates through a threaded hole of the upper membrane cover 5 and abuts against the top surface of the limiting plate; the upper end face of the valve core 1 is bonded and connected with the rubber diaphragm 3, the valve inlet 10 is arranged on one side face of the valve body 2 and communicated with an inner cavity of the valve body 2, the valve outlet 12 is arranged on the bottom face of the valve body 2 and communicated with the inner cavity of the valve body 2, the lower membrane cover 4 is communicated with the valve outlet 12 through an internal communication pipeline 15, and the valve inlet 10 is communicated with the valve outlet 12 through a throttling channel 11; specifically, the pressure in the

passages

11 and 15 is equal to the pressure in the signal port B9, and when the ash conveying pipe 14 is blocked, the pressure difference causes the valve core 1 to open, and a large amount of compressed gas is injected into the ash conveying pipe 14 through the passage 12.

The signal port A8 is arranged on one side of the top surface of the upper membrane cover 5, the signal port B9 is arranged on one side of the bottom surface of the lower membrane cover 4, and the signal port A8 and the signal port B9 vertically correspond. Specifically, the signal port A8 on the previous ash conveying valve 100 is communicated with the signal port B9 on the next ash conveying valve 100 through a pipeline, that is, the signal port A8 on the first valve 101 is communicated with the signal port B9 on the second valve 102 through a pipeline, the signal port A8 on the second valve 102 is communicated with the signal port B9 on the third valve 103 through a pipeline, and so on until the number n is reached.

The periphery of the rubber diaphragm 3 is tightly pressed and connected on the matching edges of the lower diaphragm cover 4 and the upper diaphragm cover 5, and the rubber diaphragm 3 divides the hollow cavity into an upper part and a lower part.

And two ends of the spring 6 are positioned and connected on the opposite surfaces of the rubber diaphragm 3 and the limiting plate.

The valve core 1 is formed by connecting a straight rod and a blocking head, the side wall of the bottom of the blocking head is a conical surface, and the conical surface is tightly pressed on the valve outlet 12.

In addition, can install a plurality of pressure monitoring devices on defeated grey pipeline 14, for example the manometer, specific can with the equidistant distribution of manometer on defeated grey pipeline 14 and with defeated grey valve 100 intervals arrange, with monitoring signal transmission to control center, through the unobstructed and jam condition of operating personnel visual monitoring whole defeated grey pipeline to the unobstructed of whole defeated grey pipeline of effectual assurance.

The operation principle of the pilot-operated ash valve 100 is as follows:

first, the pressure at the valve inlet 10 is set to P1 and referred to as the valve inlet pressure, the pressure at the valve outlet 12 is set to P2 and referred to as the valve outlet pressure, and the pressure in the ash transport pipe 14 is set to P3 and referred to as the ash transport pipe pressure;

1) when the ash conveying valve is closed, the valve inlet pressure P1 enters the valve through the throttling channel 11, the valve outlet pressure P2 is slowly increased, and the valve outlet pressure P2 is finally increased to a value equivalent to the ash conveying pipeline pressure P3 due to the existence of the check valve on the branch channel connected below the valve inlet;

2) when the signal port A and the signal port B generate a pressure difference, the rubber diaphragm 3 is driven by air pressure to move upwards, the spring 6 is compressed to drive the valve core 1 to ascend, so that the valve outlet 12 is opened, compressed air enters the valve inlet 10 through the air inlet branch pipe, and then a large amount of compressed air is injected into the ash conveying pipeline 14 through the valve outlet 12 and the check valve 13, so that the dredging operation of a blockage point is completed;

3) when the pressure difference between the signal port A and the signal port B is gradually equal, the rubber diaphragm 3 moves downwards, the spring 6 resets and extends out, the valve core 1 is driven to firstly close the valve outlet 12, and the compressed air is stopped from being injected into the ash conveying pipeline 14.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The utility model provides a pilot-operated tonifying qi ash conveying system which characterized in that: the device comprises a pilot-operated ash conveying valve (100), an ash conveying pipeline (14) and a compressed air pipeline (16), wherein a plurality of ash conveying valves (100) are arranged between the ash conveying pipeline (14) and the compressed air pipeline (16) in parallel, the ash conveying pipeline (14) is communicated with a valve outlet (12) of the ash conveying valve (100) through a plurality of branch channels, check valves (13) are arranged on the branch channels, and the compressed air pipeline (16) is communicated with a valve inlet (10) of the ash conveying valve (100) through a plurality of air inlet branch pipes; the signal port A (8) of the front ash conveying valve (100) is communicated with the signal port B (9) of the adjacent rear ash conveying valve (100) through a pipeline, the signal port B (9) of the first ash conveying valve (100) is blocked, and the signal port A (8) of the last ash conveying valve (100) is blocked.

2. The pilot-operated air-supplementing and ash-transporting system according to claim 1, wherein: the distance between two adjacent ash conveying valves (100) is not more than 2 m, the number of the ash conveying valves (100) is sequentially from a first valve (101), a second valve (102), a third valve (103), a fourth valve (104) to a fifth valve (105) to a n valve, and the number of the n valve is set according to the total length of the ash conveying pipeline (14).

3. The pilot-operated air-supplementing and ash-transporting system according to claim 1, wherein: the pilot-operated ash conveying valve (100) comprises a valve core (1) and a valve body (2), wherein the valve core (1) is arranged in an inner cavity of the valve body (2) in a telescopic mode, a lower membrane cover (4) is connected to the top surface of the valve body (2), an upper membrane cover (5) is arranged above the lower membrane cover (4), the lower membrane cover (4) and the upper membrane cover (5) are connected to form a hollow cavity, a rubber membrane (3) is connected to the center of the hollow cavity, the upper side of the rubber membrane (3) is connected with a limiting plate through a spring (6), a limiting screw (7) is arranged above the limiting plate, and a screw rod of the limiting screw (7) penetrates through a threaded hole of the upper membrane cover (5) and then abuts against the top surface of the limiting plate; the upper end face of the valve core (1) is bonded with the rubber diaphragm (3), the valve inlet (10) is formed in one side face of the valve body (2) and communicated with an inner cavity of the valve body (2), the valve outlet (12) is formed in the bottom face of the valve body (2) and communicated with the inner cavity of the valve body (2), the lower membrane cover (4) is communicated with the valve outlet (12) through an inner communicating pipeline (15), and the valve inlet (10) is communicated with the valve outlet (12) through a throttling channel (11).

4. The pilot-operated air-supplementing and ash-transporting system according to claim 3, wherein: the signal port A (8) is arranged on one side of the top surface of the upper membrane cover (5), the signal port B (9) is arranged on one side of the bottom surface of the lower membrane cover (4), and the signal port A (8) corresponds to the signal port B (9) up and down.

5. The pilot-operated air-supplementing and ash-transporting system according to claim 3, wherein: the periphery of the rubber diaphragm (3) is tightly pressed and connected on the matching edges of the lower diaphragm cover (4) and the upper diaphragm cover (5), and the rubber diaphragm (3) divides the hollow cavity into an upper part and a lower part.

6. The pilot-operated air-supplementing and ash-transporting system according to claim 3, wherein: and the two ends of the spring (6) are positioned and connected on the opposite surfaces of the rubber diaphragm (3) and the limiting plate.

7. The pilot-operated air-supplementing and ash-transporting system according to claim 3, wherein: the valve core (1) is formed by connecting a straight rod and a blocking head, the side wall of the bottom of the blocking head is a conical surface, and the conical surface is tightly pressed on the valve outlet (12).