Pressure measuring and purging switching device for dust environment and using method of pressure measuring and purging switching device

Abstract

The invention discloses a pressure measurement purging switching device for a dust environment, and the device comprises an installation housing which is internally provided with a two-position three-way solenoid valve, a time relay, a selection switch, and a far-end wiring terminal. The two-position three-way electromagnetic valve is provided with a first connector used for being connected with a purging pipeline, a second connector used for being connected with a pressure measuring instrument, a third connector used for being connected with a pressure taking pipeline and a valve rod, and the valve rod moves in the two-position three-way electromagnetic valve so that the third connector can be communicated with the first connector or the second connector. And the two-position three-way electromagnetic valve is connected with a time relay or a far-end wiring terminal through a selective switch. A control system connected with a time relay or a far-end wiring terminal is used for switching interfaces communicated with the interior of the two-position three-way electromagnetic valve at regular time, so that the pressure tapping pipeline is purged at regular time, and stable operation of dust environment pressure detection is ensured.

Description

Technical Field

[0001] The invention relates to the field of dust treatment, and in particular to a pressure measurement and purge switching device for a dust environment and a use method thereof. Background Art

[0002] Pressure detection systems in dusty environments such as dust removal systems and flue systems are prone to blockage of pressure pipes due to high dust content in the process medium. Traditional cyclone dust collectors cannot prevent the pressure pipes from being blocked by dust, and the instrument maintenance workload is large. At present, pressure pipes in dusty environments are generally cleaned manually on a regular basis, which requires a large workload for workers and has a limited frequency of cleaning, making it impossible to prevent the pressure pipes from being blocked by dust. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a pressure measurement and purge switching device for a dusty environment and a use method thereof, which can automatically purge the pressure sampling pipeline regularly to ensure the stable operation of pressure detection in the dusty environment.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pressure measurement and purge switching device for a dusty environment, comprising an installation shell, wherein a two-position three-way solenoid valve, a time relay, a selection switch and a remote wiring terminal are arranged inside the installation shell, the two-position three-way solenoid valve is provided with a first interface for connecting a purge pipeline, a second interface for connecting a pressure measuring instrument, a third interface for connecting a pressure taking pipeline and a valve stem, the valve stem moves inside the two-position three-way solenoid valve to connect the third interface with the first interface or the second interface, and the two-position three-way solenoid valve is connected to the time relay or the remote wiring terminal through the selection switch.

[0005] The first interface, the second interface and the third interface are respectively connected to the purge pipeline, the pressure measuring pipeline and the pressure taking pipeline through pipe joints.

[0006] The purge pipeline, pressure measuring pipeline and pressure taking pipeline are made of red copper.

[0007] The purge pipeline is in communication with compressed air.

[0008] The installation shell is made of stainless steel.

[0009] The method for using the pressure measurement and purge switching device for a dusty environment specifically comprises the following steps: S1, control the selection switch to connect the two-position three-way solenoid valve with the time relay; S2, the time relay is equipped with a timing cycle module, and the purge time and pressure measurement time are set; S3, start the device, the time relay controls the two-position three-way solenoid valve to connect the third interface with the first interface, and purge and clean the pressure-taking pipeline until the purge time is over; S4, switching to the pressure measurement time, the time relay controls the two-position three-way solenoid valve to connect the third interface with the second interface, and measures the pressure of the pressure-taking pipeline until the pressure measurement time ends; S5. Switch to the purge time and repeat steps S3-S4 until the device is turned off.

[0010] The method for using the pressure measurement and purge switching device for a dusty environment may also be the following steps: S1, control the selection switch to connect the two-position three-way solenoid valve to the remote control wiring terminal; S2, the remote control terminal is connected to the control system, and the control system sets the timing cycle purge time and pressure measurement time; S3, the start device, the control system connected to the remote control terminal controls the two-position three-way solenoid valve to connect the third interface with the first interface, and the pressure-taking pipeline is purged and cleaned until the purging time is over; S4, switching to the pressure measurement time, the control system connected to the remote control terminal controls the two-position three-way solenoid valve to connect the third interface with the second interface, and measures the pressure of the pressure-taking pipeline until the pressure measurement time ends; S5. Switch to the purge time and repeat steps S3-S4 until the device is turned off.

[0011] Beneficial effects of the present invention: Compared with the prior art, the present invention controls a two-position three-way solenoid valve through a control system connected by a time relay or a remote wiring terminal, and controls the two-position three-way solenoid valve to switch the third interface to connect with the first interface or the second interface through the timing cycle mode of the time relay or the control system, thereby realizing timed purge of the pressure taking pipeline, preventing the pressure taking pipeline from being blocked by dust, preventing the pressure measuring instrument from being damaged by compressed air, and ensuring the stable operation of pressure detection in a dust environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; 1. Install the housing; 2. Two-position three-way solenoid valve; 21. First interface; 22. Second interface; 23. Third interface; 24. Valve stem; 3. Time relay; 4. Pipe joint; 5. Purge pipeline; 6. Pressure measuring pipeline; 7. Pressure taking pipeline; 8. Selector switch; 9. Remote control terminal. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments. Example

[0015] like Figure 1 As shown, the present invention provides a pressure measurement and purge switching device for dusty environment, including a mounting shell 1, wherein a two-position three-way solenoid valve 2, a time relay 3, a selection switch 8 and a remote terminal 9 are arranged inside the mounting shell, wherein the two-position three-way solenoid valve 2 is provided with a first interface 21 for connecting a purge pipeline, a second interface 22 for connecting a pressure measuring instrument, a third interface 23 for connecting a pressure taking pipeline and a valve stem 24, wherein the valve stem 24 moves inside the two-position three-way solenoid valve 2 to make the third interface 23 communicate with the first interface 21 or the second interface 22, and the two-position three-way solenoid valve 2 is connected with the time relay or the remote terminal through the selection switch 8. The first interface 21, the second interface 22 and the third interface 23 are respectively connected with the purge pipeline 5, the pressure measurement pipeline 6 and the pressure taking pipeline 7 through the pipe joint 4.

[0016] The purge pipeline 5, the pressure measuring pipeline 6 and the pressure taking pipeline 7 are made of copper or stainless steel.

[0017] The purge pipeline is in communication with compressed air.

[0018] The installation shell 1 is made of stainless steel or aluminum alloy.

[0019] The method for using the pressure measurement and purge switching device for a dusty environment specifically comprises the following steps: S1, control the selection switch 8 to connect the two-position three-way solenoid valve 2 with the time relay; S2, time relay 3 is equipped with a timing cycle module, and the purge time and pressure measurement time are set; S3, start the device, the time relay 3 controls the two-position three-way solenoid valve 2 to connect the third interface 23 with the first interface 21, and purge and clean the pressure-taking pipeline until the purge time is over; S4, switching to the pressure measurement time, the time relay 3 controls the two-position three-way solenoid valve 2 to connect the third interface 23 with the second interface 22, and measures the pressure of the pressure-taking pipeline until the pressure measurement time ends; S5. Switch to the purge time and repeat steps S3-S4 until the device is turned off. Example

[0020] The method for using the pressure measurement and purge switching device for a dust environment may also adopt the following steps: S1, control the selection switch 8 to connect the two-position three-way solenoid valve 2 to the remote control terminal 9; S2, remote control terminal 9 is connected to the control system, and the control system sets the timing cycle purge time and pressure measurement time; S3, the device is started, and the control system connected to the remote control terminal 9 controls the two-position three-way solenoid valve 2 to connect the third interface 23 with the first interface 21, and the pressure-taking pipeline is purged and cleaned until the purging time is over; S4, switching to the pressure measurement time, the control system connected to the remote control terminal 9 controls the two-position three-way solenoid valve 2 to connect the third interface 23 with the second interface 22, and measures the pressure of the pressure-taking pipeline until the pressure measurement time ends; S5. Switch to the purge time and repeat steps S3-S4 until the device is turned off.

[0021] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A pressure measurement and purge switching device for a dusty environment, characterized in that: The invention comprises a mounting housing (1), wherein a two-position three-way solenoid valve (2), a time relay (3), a selection switch (8) and a remote wiring terminal (9) are arranged inside the mounting housing, wherein the two-position three-way solenoid valve (2) is provided with a first interface (21) for connecting to a purge pipeline, a second interface (22) for connecting to a pressure measuring instrument, a third interface (23) for connecting to a pressure sampling pipeline and a valve stem (24), wherein the valve stem (24) moves inside the two-position three-way solenoid valve (2) so that the third interface (23) is connected to the first interface (21) or the second interface (22), and the two-position three-way solenoid valve (2) is connected to the time relay or the remote wiring terminal via the selection switch (8).

2. A pressure measurement and purge switching device for a dusty environment according to claim 1, characterized in that: The first interface (21), the second interface (22) and the third interface (23) are respectively connected to the purge pipeline (5), the pressure measuring pipeline (6) and the pressure taking pipeline (7) via pipe joints (4).

3. A pressure measurement and purge switching device for a dusty environment according to claim 1, characterized in that: The purge pipe (5), the pressure measuring pipe (6) and the pressure taking pipe (7) are made of red copper.

4. The pressure measurement and purge switching device for a dusty environment according to claim 1, characterized in that: The purge pipeline is in communication with compressed air.

5. The pressure measurement and purge switching device for a dusty environment according to claim 1, characterized in that: The installation shell (1) is made of stainless steel.

6. A method for using the pressure measurement and purge switching device for a dusty environment as claimed in any one of claims 1 to 5, characterized in that: The specific steps include: S1, controls the selector switch (8) to connect the two-position three-way solenoid valve (2) to the time relay; S2, time relay (3) is provided with a timing cycle module, and the purge time and pressure measurement time are set; S3, starting the device, the time relay (3) controls the two-position three-way solenoid valve (2) to connect the third interface (23) with the first interface (21), and purges and cleans the pressure-taking pipeline until the purge time ends; S4, switching to the pressure measurement time, the time relay (3) controls the two-position three-way solenoid valve (2) to connect the third interface (23) with the second interface (22), and measures the pressure of the pressure-taking pipeline until the pressure measurement time ends; S5. Switch to the purge time and repeat steps S3-S4 until the device is turned off.

7. A method for using the pressure measurement and purge switching device for a dusty environment as claimed in claim 6, characterized in that: The specific steps include: S1, controlling the selector switch (8) to connect the two-position three-way solenoid valve (2) to the remote control terminal (9); S2, remote control terminal (9) is connected to the control system, and the control system sets the purge time and pressure measurement time of the timing cycle; S3, starting the device, the control system connected to the remote control terminal (9) controls the two-position three-way solenoid valve (2) to connect the third interface (23) with the first interface (21), and purges and cleans the pressure-taking pipeline until the purge time is over; S4, switching to the pressure measurement time, the control system connected to the remote control terminal (9) controls the two-position three-way solenoid valve (2) to connect the third interface (23) with the second interface (22), and measures the pressure of the pressure-taking pipeline until the pressure measurement time ends; S5. Switch to the purge time and repeat steps S3-S4 until the device is turned off.

Images