Automatic dredging control device for pressure measuring pipeline

Abstract

The utility model provides an automatic dredging management and control device for a pressure measuring pipeline. The automatic dredging management and control device comprises an electrical control assembly and a mechanical structure assembly which are electrically connected. The electrical control assembly comprises a PLC (Programmable Logic Controller), a relay and an electromagnetic valve which are electrically connected in sequence; the mechanical structure assembly comprises a pressure measuring instrument, and a double-acting cylinder, a protective pipe and a dredging branch pipe which are connected in sequence; the extending end of a piston rod of the double-acting cylinder is fixedly connected with a cleaning rod, the other end of the cleaning rod faces the direction away from the double-acting cylinder, and the extending end of the piston rod and the cleaning rod are both located in the protective pipe. A magnetic switch and an electromagnetic valve are installed on a cylinder body of the double-acting air cylinder, and the electrical control assembly is electrically connected with the magnetic switch and the pressure measuring instrument. According to the utility model, the electrical control assembly and the mechanical structure assembly are matched for use, so that the pressure measuring pipeline is automatically dredged, the intelligence and automation of pressure measuring point maintenance are improved, the working difficulty and the working intensity of maintenance personnel are reduced, and potential safety hazards during operation of the maintenance personnel are also avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel smelting, and in particular relates to an automatic dredging control device for a pressure measuring pipeline. Background Art

[0002] Metallurgical furnace workshops involve numerous process steps, resulting in numerous negative pressure detection points, all of which are subject to varying degrees of blockage. Blockage is most severe at pressure detection points located in the boiler's riser section and along the flue.

[0003] Existing techniques typically involve manual unblocking, one by one, typically at the time of troubleshooting. Due to the large number of test points, manual unblocking is time-consuming and labor-intensive, significantly inconvenient for maintenance personnel. Furthermore, negative pressure test points are often located in specialized locations such as furnaces and flues, creating risks such as high-temperature burns and smoke choking, increasing safety risks for maintenance personnel during cleaning and maintenance. Utility Model Content

[0004] The utility model aims to provide an automatic dredging control device for pressure measuring pipelines, which replaces manual dredging and eliminates safety risks.

[0005] To achieve the above-mentioned purpose, the utility model provides an automatic dredging and control device for pressure measuring pipelines, comprising: an electrically connected electrical control component and a mechanical structure component; the electrical control component comprises a PLC controller, a relay and a solenoid valve electrically connected in sequence; the mechanical structure component comprises a pressure measuring instrument and a double-acting cylinder, a protective tube and a dredging branch pipe connected in sequence; the protruding end of the double-acting cylinder piston rod is fixedly connected to a cleaning rod, the other end of the cleaning rod faces away from the double-acting cylinder, and the protruding end of the piston rod and the cleaning rod are both located in the protective tube; a magnetic switch and a solenoid valve are installed on the double-acting cylinder body, and the electrical control component is electrically connected to the magnetic switch and the pressure measuring instrument respectively.

[0006] The automatic dredging and control device of the utility model realizes automatic dredging of negative pressure in the pressure measuring pipeline by cooperating with the electrical control components and the mechanical structure components, thereby improving the intelligence and automation of the maintenance of the pressure measuring point, reducing the difficulty and intensity of the work of the maintenance personnel, and avoiding the safety hazards during the operation of the maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the automatic dredging control device of the present invention.

[0008] Figure 2 Schematic diagram of the mechanical structure components of the automatic dredging control device of the present invention;

[0009] Figure 3This is a cross-sectional view of the mechanical structure components of the automatic dredging control device of the present invention;

[0010] Figure 4 for Figure 2 Bottom view of

[0011] Figure 5 This is a schematic diagram of the pressure-taking pipe in the automatic dredging and control device of the utility model.

[0012] In the figure: 1-double-acting cylinder; 11-piston rod; 12-cleaning rod; 13-gas source pipe; 14-throttle valve; 21-first magnetic switch; 22-second magnetic switch; 3-protective pipe; 41-dredging branch pipe; 42-detection branch pipe; 5-flue; 6-solenoid valve. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0014] In view of the shortcomings and safety risks of manual unclogging of pressure measuring pipelines in the existing technology, the utility model proposes an automatic unclogging device for pressure measuring pipelines under special environments. The constraint conditions for automatic unclogging of negative pressure in the pipeline are set by electrical control components and executed on the mechanical structure. The purpose is to solve the problems of untimely maintenance of pressure measuring points by maintenance personnel, great difficulty and high risk of maintenance.

[0015] like Figure 1 As shown, the automatic dredging and control device of the present invention includes an electrically connected electrical control component and a mechanical structure component.

[0016] The electrical control assembly includes a PLC controller, a relay and a solenoid valve 6 which are electrically connected in sequence.

[0017] like Figures 2-4 As shown, the mechanical structure components of the automatic dredging control device of the present invention include a double-acting cylinder 1, a protective tube 3 and a dredging branch pipe 41 connected in sequence; a magnetic ring is sleeved on the piston rod 11 of the double-acting cylinder 1, and a cleaning rod 12 is fixedly connected to the protruding end of the piston rod 11. The cleaning rod 12 is a steel chisel, and the tip of the cleaning rod 12 is a free end, which faces away from the double-acting cylinder 1; the protruding end of the piston rod 11 and the cleaning rod 12 are both located in the protective tube 3, one end of the protective tube 3 is fixedly connected to the cylinder body of the double-acting cylinder 1, and the other end of the protective tube 3 is fixedly connected to one end of the dredging branch pipe 41 through a flange; a detection branch pipe 42 is fixedly connected to the side wall of the dredging branch pipe 41, one end of the detection branch pipe 42 is fixedly connected to the dredging branch pipe 41, and the other end of the detection branch pipe 42 is the installation end, the inner hole of the detection branch pipe 42 is connected to the inner hole of the dredging branch pipe 41, and the dredging branch pipe 41 and the detection branch pipe 42 form a Y shape, as shown in FIG. Figure 5 A pressure measuring instrument is installed at the installation end of the detection branch pipe 42.

[0018] A first magnetic switch 21 and a second magnetic switch 22 are mounted on either end of the double-acting cylinder 1. These switches are inserted into U-shaped grooves on the outer wall of the cylinder body and secured with screws. Both switches 21 and 22 have LED lights.

[0019] A mounting base is provided on the outer wall of the double-acting cylinder 1, and the solenoid valve 6 is installed on the mounting base. A throttle valve 14 is installed on the two air ports of the double-acting cylinder 1. The throttle valve 14 is connected to the solenoid valve 6 through the air source pipe 13, and the solenoid valve 6 is connected to the air source passage.

[0020] The pressure measuring instrument, the first magnetic switch 21 and the second magnetic switch 22 are all connected to the PLC controller signal.

[0021] Use the utility model automatic dredging control device:

[0022] The other end of the dredging branch pipe 41 is fixedly connected to the flue 5 so that the inner hole of the dredging branch pipe 41 is connected to the inside of the flue 5.

[0023] The constraints for automatically clearing the negative pressure (such as the upper limit of the negative pressure value detected by the pressure gauge and the preset time period) are preset through the PLC controller. When the pressure gauge detects that the negative pressure value in the detection branch pipe 42 reaches the preset upper limit of the negative pressure value, the PLC controller sends a clearing command to the mechanical structure component and acts on the solenoid valve 6. The open and closed states of the solenoid valve 6 will change the direction of the internal air source passage: when the solenoid valve 6 is de-energized, the air source enters the top of the double-acting cylinder 1 (i.e., the side close to the extended end of the piston rod 11) through the normally open passage of the solenoid valve 6, causing the piston rod 11 to be in an extended state; when the solenoid valve 6 is energized, the normally closed passage of the solenoid valve 6 opens, the normally open passage closes, and the air source enters the bottom of the double-acting cylinder 1 (i.e., the side away from the extended end of the piston rod 11) through the normally closed passage of the solenoid valve 6, causing the piston rod 11 to be in a retracted state.

[0024] If the negative pressure value detected by the pressure measuring instrument is lower than the preset negative pressure upper limit for a long time, the PLC controller can start the automatic dredging process within the set time period to avoid the impact caused by failure of the pressure measuring instrument and other reasons.

[0025] By interlocking the magnetic switch with the movement stroke of the piston rod 11, it is avoided that the negative pressure pipeline is not properly cleared due to the stroke being too short when cleaning and unblocking the negative pressure pipeline; and the sum of the movement stroke of the piston rod 11 and the length of the cleaning rod 12 is set to be greater than the sum of the length of the protective tube 3 and the length of the unblocking branch pipe 41, and less than the sum of the length of the protective tube 3, the length of the unblocking branch pipe 41 and the diameter of the flue 5. When the double-acting cylinder 1 stops working, the cleaning rod 12 is in the retracted state, and the tip of the cleaning rod 12 is exactly at the intersection of the detection branch pipe 42 and the unblocking branch pipe 41, which ensures that the negative pressure detection is not affected and the cleaning rod 12 cannot touch the flue 5, thereby not affecting production.

[0026] The utility model adopts a Y-shaped pressure taking tube (i.e., the dredging branch tube 41 and the detection branch tube 42 form a Y shape), which overcomes the defect of the prior art that the negative pressure detection and negative pressure dredging in the pressure measuring pipeline are not synchronized, and realizes the simultaneous negative pressure detection and negative pressure dredging and cleaning, which is convenient and fast.

[0027] The throttle valve 14 controls the gas source passage between the solenoid valve 6 and the double-acting cylinder 1: controls the gas flow entering the double-acting cylinder 1, thereby adjusting the speed of extension and retraction of the piston rod 11, and indirectly controls the force of the cleaning rod 12 when clearing.

[0028] In order to ensure the sealing of the automatic dredging control device, the two ends of the protective pipe 3 and the dredging branch pipe 41 are first connected with flanges, and asbestos pads are placed between the flanges and then tightened with bolts for sealing.

[0029] The automatic dredging device of the present invention can adopt a timed automatic dredging operation mode, and can also perform negative pressure dredging according to the pressure value in the flue 5. The two dredging modes are coordinated to avoid frequent abnormalities caused by negative pressure blockage in the flue 5, eliminate negative pressure abnormal faults in the bud, and achieve the purpose of preventing problems before they occur.

[0030] The PLC controller sends instructions to the relay to control the power on and off of the relay; then it controls the on and off of the solenoid valve 6, changes the air source path between the solenoid valve 6 and the double-acting cylinder 1, and controls the moving direction of the piston rod 11 in the cylinder body (i.e., the forward and reverse stroke), and finally drives the cleaning rod 12 to clear the negative pressure in the pipeline.

Claims

1. An automatic dredging and control device for a pressure measuring pipeline, characterized in that: include: An electrically connected electrical control component and a mechanical structure component; the electrical control component comprises a PLC controller, a relay and a solenoid valve (6) which are electrically connected in sequence; the mechanical structure component comprises a pressure gauge and a double-acting cylinder (1), a protective tube (3) and a dredging branch pipe (41) which are connected in sequence; a cleaning rod (12) is fixedly connected to the extended end of the piston rod (11) of the double-acting cylinder (1), the other end of the cleaning rod (12) faces in a direction away from the double-acting cylinder (1), and the extended end of the piston rod (11) and the cleaning rod (12) are both located in the protective tube (3); a magnetic switch and a solenoid valve (6) are installed on the cylinder body of the double-acting cylinder (1), and the electrical control component is electrically connected to the magnetic switch and the pressure gauge respectively.

2. The automatic dredging and control device for pressure measuring pipelines according to claim 1, characterized in that: A mounting base is provided on the outer wall of the double-acting cylinder (1), and the solenoid valve (6) is mounted on the mounting base; a throttle valve (14) is installed on both gas ports of the double-acting cylinder (1), and the throttle valve (14) is connected to the solenoid valve (6) through the gas source pipe (13), and the solenoid valve (6) is connected to the gas source passage.

3. The automatic dredging and control device for pressure measuring pipelines according to claim 1, characterized in that: A detection branch pipe (42) is fixedly connected to the side wall of the dredging branch pipe (41), and the other end of the detection branch pipe (42) is a mounting end. A pressure measuring instrument is mounted on the mounting end of the detection branch pipe (42); the inner hole of the detection branch pipe (42) is connected to the inner hole of the dredging branch pipe (41), and the dredging branch pipe (41) and the detection branch pipe (42) form a Y shape.

4. The automatic dredging and control device for pressure measuring pipelines according to claim 1, characterized in that: The cleaning rod (12) is a steel chisel, and the tip of the cleaning rod (12) is a free end, facing away from the double-acting cylinder (1).

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