Pressure transmitter capable of preventing blockage of detection substances

Abstract

The utility model relates to the technical field of pressure transmitters, and provides a pressure transmitter capable of preventing blockage of detection substances, which comprises a pressure transmitter main body, a pressure sensor outer tube is arranged at the bottom of the pressure transmitter main body, and a pressure leading hole is formed in the center of the bottom of the pressure sensor outer tube. A guide block is welded to the bottom of the inner wall of the pressure sensor outer pipe. According to the pressure transmitter capable of preventing blockage of the detection substances, the pneumatic push rod pushes the motor to move downwards, the brush head can scrape the second filter screen under the driving of the motor, the spring can be contracted along with continuous pushing of the pneumatic push rod, bristles of the brush head penetrate through the second filter screen to be in contact with the first filter screen, and falling impurities can be cleaned under the guide of the guide block; and the impurities in the detection medium are discharged from the pressure guide hole again, and the impurities on the first filter screen and the second filter screen can be sucked by using the suction component, so that the impurities in the detection medium can be cleaned after entering the pressure transmitter, blockage is prevented, and normal use of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pressure transmitter technology, specifically to a pressure transmitter that prevents blockage by the detected substance. Background Art

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electrical signals for control and remote transmission. It can convert the physical pressure parameters of gases, liquids, etc., sensed by pressure sensors into standard electrical signals to supply secondary instruments such as indicators, alarms, recorders, and controllers for measurement, indication, and process regulation. Pressure transmitters are one of the most commonly used sensors in industrial practice, and they are widely used in various industrial automation environments, involving many industries such as water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemicals, oil wells, power, shipbuilding, machine tools, and pipelines.

[0003] A search revealed existing technology (publication number: CN211085555U) pressure transmitters, which described a system that "includes a main body, with a bottom shell connected to the top of the main body. Multiple sets of fixing bolts are connected to both ends of the bottom shell. A high-pressure interface is located on one side of the bottom shell, and a low-pressure interface is located at the end of the high-pressure interface on the same side of the bottom shell. Multiple sets of pipes are installed inside each set of bottom shells. A water hammer eliminator is located on the outside of the bottom shell, penetrating the bottom shell and extending into the pipes inside the bottom shell. A cavity is provided inside the water hammer eliminator, and a piston is connected inside the cavity." However, in use, impurities in the detected medium can cause blockages when entering the pressure transmitter, easily affecting the equipment's operation. Therefore, designing a pressure transmitter that prevents blockage by detected substances is essential. Utility Model Content

[0004] The purpose of this invention is to provide a pressure transmitter that prevents blockage by the detected substance, thus solving the problem in related technologies where impurities in the detected medium can cause blockage when they enter the pressure transmitter during use, which can easily affect the operation of the equipment.

[0005] The technical solution of this utility model is as follows:

[0006] A pressure transmitter for preventing detection clogging includes a pressure transmitter body. A pressure sensor outer tube is located at the bottom of the pressure transmitter body, and a pressure-feeding hole is located at the center of the bottom of the pressure sensor outer tube. A guide block is welded to the bottom of the inner wall of the pressure sensor outer tube, and a first filter screen is welded to the top of the guide block. A second filter screen is located above the top of the first filter screen, and springs are welded to the bottom perimeter of the second filter screen. One bottom end of each spring is screwed to the top of the first filter screen. A fixing plate is welded to the inner wall of the pressure sensor outer tube, and a pneumatic push rod is screwed to the bottom end face of the fixing plate. A motor is screwed to the telescopic end of the pneumatic push rod, and a brush head is fixed to the output end of the motor. A suction assembly is located on one side of the pressure sensor outer tube.

[0007] Preferably, the brush head is suspended above the top of the second filter screen, the first and second filter screens are of equal size, and the outer contours of the first and second filter screens are in contact with the inner wall of the outer tube of the pressure sensor.

[0008] Preferably, the suction assembly includes a suction port, a suction frame, a delivery pipe, and a vacuum pump. The suction port is provided on one side of the outer wall of the pressure sensor outer tube, and a suction frame is welded to the outside of the suction port. The delivery pipe is threaded onto the other end of the suction frame, and a vacuum pump is inserted into the other end of the delivery pipe. The suction port is located outside the first filter screen and the second filter screen.

[0009] Preferably, a screen is welded inside the conveying pipe, and the screen is located at the connection between the conveying pipe and the air pump.

[0010] Preferably, the fixed plate has four openings, and the four openings are located on the outer periphery of the pneumatic push rod.

[0011] Preferably, the outer tube of the pressure sensor is screwed with a shell, and the inner wall of the shell is screwed with a heat insulation pad. The top and bottom surfaces of the shell are provided with a plurality of vent holes at equal intervals.

[0012] Preferably, a heat-conducting pipe is screwed into the inside of the outer shell, and the heat-conducting pipe is a threaded pipe, which is sleeved on the outside of the pressure sensor outer tube.

[0013] Preferably, a connecting pipe is welded to the center of the heat pipe, and the other end of the connecting pipe passes through the outer shell and is welded to an air inlet pipe, with a fan screwed into the inside of the air inlet pipe.

[0014] Preferably, an electric heating element is installed inside the air intake pipe with equidistant threads, and a dustproof mesh is screwed to the end of the air intake pipe away from the connecting pipe.

[0015] Preferably, the inner contour of the guide block is bucket-shaped.

[0016] The beneficial effects of this utility model are:

[0017] 1. By fixing the outer tube of the pressure sensor to the pipeline, the medium can flow into the outer tube of the pressure sensor through the pressure tapping hole. Impurities in the detected medium can be filtered through the first and second filters. The spring can act as a buffer when the detected medium enters. The pneumatic push rod pushes the motor downward. Driven by the motor, the brush head can scrape the second filter. As the pneumatic push rod continues to push, the spring can be contracted, and the bristles of the brush head can pass through the second filter and contact the first filter. The debris that is cleaned off will be discharged again from the pressure tapping hole under the guidance of the guide block. The suction component can remove the debris from the first and second filters. This method can clean the debris in the detected medium after it enters the pressure transmitter, prevent blockage, and ensure the normal operation of the equipment.

[0018] 2. The outer shell and insulation pad protect and insulate the outer tube of the pressure sensor. The vent holes allow air to circulate inside the shell. A fan and connecting pipe draw outside air into the intake pipe, where an electric heating element heats the gas. The heated gas then flows through the intake pipe into the heat-conducting pipe, and from the top and bottom of the heat-conducting pipe into the outer shell for further heating, preventing the medium from freezing. The dust filter also helps to filter the air. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is an isometric view of the entire utility model;

[0021] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0022] Figure 3 This is an overall sectional view of the present invention;

[0023] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 5 This is a front view of the entire utility model.

[0025] In the diagram: 1. Pressure transmitter body; 2. Pressure sensor outer tube; 3. Pressure tapping hole; 4. Guide block; 5. First filter screen; 6. Second filter screen; 7. Spring; 8. Fixing plate; 9. Pneumatic push rod; 10. Motor; 11. Brush head; 12. Suction assembly; 121. Suction port; 122. Suction frame; 123. Delivery pipe; 124. Air pump; 125. Screen; 13. Through port; 14. Outer shell; 15. Insulation pad; 16. Vent hole; 17. Heat conduction pipe; 18. Connecting pipe; 19. Air inlet pipe; 20. Fan; 21. Heating element; 22. Dustproof net. DETAILED DESCRIPTION

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0027] like Figure 1-5As shown, this embodiment proposes a pressure transmitter to prevent detection material blockage, including a pressure transmitter body 1. A pressure sensor outer tube 2 is located at the bottom of the pressure transmitter body 1, and a pressure inlet 3 is opened at the center of the bottom of the pressure sensor outer tube 2. A guide block 4 is welded to the bottom of the inner wall of the pressure sensor outer tube 2, and a first filter screen 5 is welded to the top of the guide block 4. A second filter screen 6 is located above the top of the first filter screen 5, and springs 7 are welded to all four sides of the bottom of the second filter screen 6. One bottom end of the springs 7 is screwed to the top of the first filter screen 5. A fixing plate 8 is welded to the inner wall of the pressure sensor outer tube 2, and a pneumatic push rod 9 is screwed to the bottom end face of the fixing plate 8. A motor 10 is screwed to the telescopic end of the pneumatic push rod 9, and the output end of the motor 10 is fixed... A brush head 11 is provided, and a suction assembly 12 is provided on one side of the pressure sensor outer tube 2. The brush head 11 is suspended above the top of the second filter screen 6. The first filter screen 5 and the second filter screen 6 are of equal size, and their outer contours fit against the inner wall of the pressure sensor outer tube 2. The suction assembly 12 includes a suction port 121, a suction frame 122, a delivery pipe 123, and a vacuum pump 124. A suction port 121 is provided on one side of the outer wall of the pressure sensor outer tube 2, and a suction frame 122 is welded to the outside of the suction port 121. The other end of the suction frame 122 is threaded with a delivery pipe 123, and the other end of the delivery pipe 123 is connected to a vacuum pump 124. The suction port 121 is located outside the first filter screen 5 and the second filter screen 6, and the vacuum pump 124 is used to pump the vacuum pump 124. 4. The conveying pipe 123 can generate negative pressure at the suction frame 122, thereby sucking the debris on the first filter screen 5 and the second filter screen 6 into the suction port 121. A screen 125 is welded inside the conveying pipe 123, and the screen 125 is located at the connection between the conveying pipe 123 and the suction pump 124. The screen 125 can isolate the sucked debris inside the conveying pipe 123. The fixing plate 8 has four openings 13, and the four openings 13 are located around the pneumatic push rod 9. The openings 13 can be used to allow the medium to flow. The outer tube 2 of the pressure sensor is screwed with a shell 14, and the inner wall of the shell 14 is screwed with an insulation pad 15. The top and bottom ends of the shell 14 are equally spaced with several vent holes 16. The shell 14 and the insulation pad 15 can be screwed into the shell 14. The heat-insulating pad 15 protects and insulates the outer tube 2 of the pressure sensor. The vent 16 allows air circulation within the outer casing 14. A threaded heat-conducting pipe 17 is screwed into the inside of the outer casing 14 and fits over the outer tube 2 of the pressure sensor. A connecting pipe 18 is welded to the center of the heat-conducting pipe 17, and the other end of the connecting pipe 18 passes through the outer casing 14 and is welded to an air inlet pipe 19. A fan 20 is screwed into the inside of the air inlet pipe 19. Through the fan 20 and the connecting pipe 18, outside air is drawn into the air inlet pipe 19. The air flows through the air inlet pipe 19 into the heat-conducting pipe 17, and then flows along the top and bottom of the heat-conducting pipe 17 into the outer casing 14. Heating elements 21 are installed inside the air inlet pipe 19 with equidistant threads.A dust filter 22 is screwed to the end of the intake pipe 19 furthest from the connecting pipe 18. The gas inside the intake pipe 19 can be heated using an electric heating element 21, and the dust filter 22 filters the air. The inner contour of the guide block 4 is funnel-shaped.

[0028] In this embodiment, the pressure transmitter body 1, pneumatic push rod 9, and air pump 124 are all existing mature technologies, so they will not be described in detail. In use, the pressure sensor outer tube 2 is fixed to a pipeline, and the medium can flow into the pressure sensor outer tube 2 through the pressure inlet 3. Impurities in the detection medium can be filtered through the first filter screen 5 and the second filter screen 6. The spring 7 acts as a buffer when the detection medium enters. The medium can contact the pressure transmitter body 1 through the port 13. The pneumatic push rod 9 pushes the motor 10 downwards. Driven by the motor 10, the brush head 11 scrapes the second filter screen 6. As the pneumatic push rod 9 continues to push, the spring 7 contracts, and the bristles of the brush head 11 pass through the second filter screen 6 and contact the first filter screen 5. The cleaned-off impurities are discharged again from the pressure inlet 3 under the guidance of the guide block 4. The air pump 124 and the delivery pipe 123 can... A negative pressure is generated at the suction frame 122, which draws the debris on the first filter screen 5 and the second filter screen 6 into the suction port 121. A screen 125 is welded inside the conveying pipe 123, and the screen 125 is located at the connection between the conveying pipe 123 and the air pump 124. The screen 125 can isolate the sucked debris inside the conveying pipe 123. The outer shell 14 and the heat insulation pad 15 can protect and insulate the outer tube 2 of the pressure sensor. The vent 16 allows air to circulate inside the outer shell 14. The fan 20 and the connecting pipe 18 can draw outside air into the air inlet pipe 19, and the electric heating tube 21 can heat the gas in the air inlet pipe 19. The heated gas flows into the heat conduction pipe 17 through the air inlet pipe 19. The gas flows into the outer shell 14 along the top and bottom of the heat conduction pipe 17 to achieve heating, which can prevent the medium from freezing. The dustproof net 22 can filter the air.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pressure transmitter for preventing blockage by detected substances, comprising a pressure transmitter body (1), characterized in that, The pressure transmitter body (1) is provided with a pressure sensor outer tube (2) at the bottom, and a pressure hole (3) is provided in the center of the bottom of the pressure sensor outer tube (2). A guide block (4) is welded to the bottom of the inner wall of the pressure sensor outer tube (2), and a first filter screen (5) is welded to the top of the guide block (4). A second filter screen (6) is provided above the top of the first filter screen (5), and springs (7) are welded to the bottom of the second filter screen (6). One end of the bottom of the spring (7) is screwed to the top of the first filter screen (5). A fixing plate (8) is welded to the inner wall of the pressure sensor outer tube (2), and a pneumatic push rod (9) is screwed to the bottom end face of the fixing plate (8). A motor (10) is screwed to the telescopic end of the pneumatic push rod (9), and a brush head (11) is fixed to the output end of the motor (10). A suction assembly (12) is provided on one side of the pressure sensor outer tube (2).

2. A pressure transmitter for preventing blockage of detected substances according to claim 1, characterized in that, The brush head (11) is suspended above the top of the second filter (6). The first filter (5) and the second filter (6) are of equal size. The outer contours of the first filter (5) and the second filter (6) are in contact with the inner wall of the pressure sensor outer tube (2).

3. A pressure transmitter for preventing blockage of detectable substances according to claim 1, characterized in that, The suction assembly (12) includes a suction port (121), a suction frame (122), a delivery pipe (123), and a vacuum pump (124). The suction port (121) is provided on one side of the outer wall of the pressure sensor outer tube (2), and the suction frame (122) is welded to the outside of the suction port (121). The delivery pipe (123) is installed at the other end of the suction frame (122) by thread, and the vacuum pump (124) is inserted at the other end of the delivery pipe (123). The suction port (121) is located outside the first filter screen (5) and the second filter screen (6).

4. A pressure transmitter for preventing blockage of detected substances according to claim 1, characterized in that, The inside of the conveying pipe (123) is welded with a screen (125), and the screen (125) is located at the connection between the conveying pipe (123) and the air pump (124).

5. A pressure transmitter for preventing blockage of detected substances according to claim 1, characterized in that, The fixed plate (8) has four openings (13), and the four openings (13) are located on the outside of the pneumatic push rod (9).

6. A pressure transmitter for preventing blockage of detected substances according to claim 1, characterized in that, The outer tube (2) of the pressure sensor is screwed with a shell (14), and the inner wall of the shell (14) is screwed with a heat insulation pad (15). The top and bottom surfaces of the shell (14) are provided with several vent holes (16) at equal intervals.

7. A pressure transmitter for preventing blockage of detectable substances according to claim 6, characterized in that, A heat-conducting pipe (17) is screwed into the inside of the outer shell (14), and the heat-conducting pipe (17) is a threaded pipe. The heat-conducting pipe (17) is sleeved on the outside of the pressure sensor outer tube (2).

8. A pressure transmitter for preventing blockage of detectable substances according to claim 7, characterized in that, A connecting pipe (18) is welded to the center of the heat pipe (17), and the other end of the connecting pipe (18) passes through the outer shell (14) and is welded with an air inlet pipe (19). A fan (20) is screwed into the inside of the air inlet pipe (19).

9. A pressure transmitter for preventing blockage of detectable substances according to claim 8, characterized in that, The air intake pipe (19) is threaded with an electric heating element (21) at equal intervals inside, and a dustproof net (22) is screwed to the end of the air intake pipe (19) away from the connecting pipe (18).

10. A pressure transmitter for preventing blockage of detectable substances according to claim 1, characterized in that, The inner contour of the guide block (4) is bucket-shaped.

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