Differential pressure transmitter with protection mechanism

Abstract

The utility model discloses a differential pressure transmitter with a protection mechanism, which relates to the technical field of differential pressure transmitters and comprises a fixed pipe, a water inlet pipe and a water outlet pipe are fixedly mounted on the outer surface of the fixed pipe, a main body is fixedly mounted at one end, far away from the fixed pipe, of the water outlet pipe, and a filter pipe is detachably mounted in the fixed pipe. A mounting plate is fixedly mounted on the lower surface of the fixed pipe, two moving plates are slidably mounted on the lower surface of the mounting plate, the upper surfaces of the moving plates are movably contacted with the lower surface of the filter pipe, a mounting disc is movably contacted with the upper surface of the fixed pipe, a connecting disc is rotatably mounted on the lower surface of the mounting disc, and a cleaning rod is detachably mounted in the connecting disc; according to the liquid filter, impurities contained in liquid are filtered through the filter pipe, the impurities in the liquid are filtered in the filter pipe, damage to the main body is avoided, and daily use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of differential pressure transmitters, in particular to a differential pressure transmitter with a protection mechanism. Background Art

[0002] The differential pressure transmitter is a typical self-balancing detection instrument, which is used to prevent the medium in the pipeline from directly entering the transmitter. The pressure-sensitive diaphragm and the transmitter are connected by a capillary tube filled with fluid. It is used to measure the liquid level, flow rate and pressure of liquid, gas or steam, and then convert it into a 4-20mA DC signal output.

[0003] At present, when most differential pressure transmitters detect liquids, since the liquids contain some impurities, during the detection process, the impurities contained in the liquids directly contact the pressure-sensitive diaphragm, which can easily cause damage to the pressure-sensitive diaphragm and affect the detection effect of the differential pressure transmitter. In view of the above problems, the inventors propose a differential pressure transmitter with a protection mechanism to solve the above problems. Utility Model Content

[0004] In order to solve the problem that the impurities in the liquid may damage the differential pressure transmitter, the utility model aims to provide a differential pressure transmitter with a protection mechanism.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a differential pressure transmitter with a protection mechanism, comprising a fixed tube, an inlet pipe and an outlet pipe are fixedly installed on the outer surface of the fixed tube, a main body is fixedly installed on one end of the outlet pipe away from the fixed tube, a filter tube is detachably installed in the fixed tube, a mounting plate is fixedly installed on the lower surface of the fixed tube, two movable plates are slidably installed on the lower surface of the mounting plate, two sliders are fixedly installed on the upper surface of the movable plate, and the sliders are slidably arranged inside the mounting plate, two double-headed screws are rotatably installed in the mounting plate, and two sliders are threadedly connected on the double-headed screws, a rotating rod is rotatably installed in the mounting plate, two fourth bevel gears are fixedly installed on the outer surface of the rotating rod, third bevel gears are fixedly installed at the center of one end of the two double-headed screws close to the rotating rod, and the third bevel gear is meshed with the fourth bevel gear, and the movable The upper surface of the movable plate is in movably contact with the lower surface of the filter tube, and the upper surface of the fixed tube is movably contacted with a mounting plate, and two fixed bars are fixedly installed on the outer surface of the fixed tube, and a moving bar is slidably installed in the fixed bar, and the upper surface of the moving bar is fixedly connected to the lower surface of the mounting plate, and two first screws are rotatably installed in the mounting plate, and the moving bar is threadedly connected to the first screw, and two bevel gear rods are rotatably installed in the mounting plate, and a first bevel gear is fixedly installed at the center of the bottom end of the first screw, and the first bevel gear and one end of the bevel gear rod are meshed, and a rotating rod is rotatably installed in the mounting plate, and two second bevel gears are fixedly installed on the outer surface of the rotating rod, and one end of the bevel gear rod away from the first bevel gear is meshed with the second bevel gear, and a connecting plate is rotatably installed on the lower surface of the mounting plate, and a cleaning rod is detachably installed in the connecting plate, and the outer surface of the cleaning rod is in movably contact with the inner wall of the filter tube.

[0006] Preferably, a motor is fixedly mounted on the upper surface of the mounting plate, and the bottom center of the output shaft of the motor is fixedly connected to the connecting plate.

[0007] Preferably, a second screw is rotatably mounted on the outer surface of the connecting disk, and the second screw rotatably penetrates the connecting disk and the cleaning rod, a nut is threadedly connected to the second screw, and the nut is in active contact with the outer surface of the connecting disk.

[0008] Preferably, a sewage pipe is fixedly mounted on the lower surface of the filter tube, and a valve is provided on the outer surface of the sewage pipe.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. In the utility model, impurities contained in the liquid are filtered by setting a filter tube, and the impurities in the liquid are filtered inside the filter tube to avoid damage to the main body, which is convenient for daily use. Secondly, the filter tube is limited by setting a movable plate, and the movable plate is driven to move by a rotating rod, which is convenient for disassembly and replacement of the filter tube.

[0011] 2. In the utility model, a cleaning rod is provided to clean the filter tube to avoid clogging of the filter tube and affect the filtering efficiency. Secondly, the cleaning rod is driven to move by the rotating rod so that the cleaning rod can be moved out of the fixed tube, which is convenient for maintenance and replacement of the cleaning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the fixed pipe of the utility model.

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the mounting plate of the utility model.

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter tube of the utility model.

[0017] Figure 5 This is a schematic diagram of the cross-sectional structure of the connection disk of the utility model.

[0018] In the figure: 1. fixed pipe; 11. water inlet pipe; 12. water outlet pipe; 13. filter pipe; 14. sewage pipe; 15. fixed bar; 16. movable bar; 2. mounting plate; 21. first screw; 22. first bevel gear; 23. bevel gear rod; 24. rotating rod; 25. second bevel gear; 26. movable plate; 27. slider; 28. double-headed screw; 281. third bevel gear; 29. ​​rotating rod; 291. fourth bevel gear; 3. mounting plate; 31. motor; 32. connecting plate; 33. cleaning rod; 34. second screw; 35. nut; 4. main body. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example: Figure 1-5As shown, the utility model provides a differential pressure transmitter with a protection mechanism, including a fixed tube 1, an outer surface of the fixed tube 1 is fixedly mounted with an inlet pipe 11 and an outlet pipe 12, an end of the outlet pipe 12 away from the fixed tube 1 is fixedly mounted with a main body 4 for detecting liquid, a filter tube 13 is detachably mounted in the fixed tube 1, a mounting plate 2 is fixedly mounted on the lower surface of the fixed tube 1, and is used to mount a movable plate 26, two movable plates 26 are slidably mounted on the lower surface of the mounting plate 2, and the upper surface of the movable plate 26 is in active contact with the lower surface of the filter tube 13, and is used to The filter tube 13 is limited. When in use, when the upper surface of the movable plate 26 contacts the lower surface of the filter tube 13, the filter tube 13 cannot move, so that the filter tube 13 can be limited. The upper surface of the fixed tube 1 is movably in contact with the mounting plate 3 for mounting the cleaning rod 33. The lower surface of the mounting plate 3 is rotatably mounted with a connecting plate 32, and the connecting plate 32 is detachably mounted with a cleaning rod 33. The outer surface of the cleaning rod 33 is movably in contact with the inner wall of the filter tube 13 to clean the filter tube 13 and avoid clogging of the filter tube 13.

[0021] Two sliders 27 are fixedly installed on the upper surface of the movable plate 26, and the sliders 27 are slidably arranged inside the mounting plate 2. Two double-headed screws 28 are rotatably installed inside the mounting plate 2, and the two sliders 27 are threadedly connected on the double-headed screws 28 to drive the movable plate 26 to move. When in use, the sliders 27 are moved by the rotation of the double-headed screws 28, and the movable plate 26 is moved by the movement of the sliders 27.

[0022] By adopting the above technical solution, the double-headed screw 28 can drive the moving plate 26 to move.

[0023] A rotating rod 29 is rotatably installed in the mounting plate 2, and two fourth bevel gears 291 are fixedly installed on the outer surface of the rotating rod 29. A third bevel gear 281 is fixedly installed at the center of one end of the two double-headed screws 28 close to the rotating rod 29, and the third bevel gear 281 and the fourth bevel gear 291 are meshed with each other to drive the double-headed screw 28 to rotate. When in use, the fourth bevel gear 291 is rotated by the rotation of the rotating rod 29, the third bevel gear 281 is rotated by the rotation of the fourth bevel gear 291, and the double-headed screw 28 is rotated by the rotation of the third bevel gear 281.

[0024] By adopting the above technical solution, the rotating rod 29 can drive the double-headed screw 28 to rotate.

[0025] A motor 31 is fixedly mounted on the upper surface of the mounting disk 3, and the bottom center of the output shaft of the motor 31 is fixedly connected to the connecting disk 32 to drive the cleaning rod 33 to rotate. When in use, the motor 31 is turned on to drive the connecting disk 32 to rotate, and the cleaning rod 33 is driven to rotate by the rotation of the connecting disk 32.

[0026] By adopting the above technical solution, the motor 31 can drive the cleaning rod 33 to rotate.

[0027] A second screw rod 34 is rotatably mounted on the outer surface of the connecting disk 32, and the second screw rod 34 rotates through the connecting disk 32 and the cleaning rod 33. A nut 35 is threadedly connected to the second screw rod 34, and the nut 35 is in active contact with the outer surface of the connecting disk 32 to install the cleaning rod 33. When in use, the second screw rod 34 is inserted and the nut 35 is screwed in so that the nut 35 is in contact with the outer surface of the connecting disk 32 to complete the installation of the cleaning rod 33 and the connecting disk 32.

[0028] By adopting the above technical solution, the second screw rod 34 and the nut 35 can be installed on the cleaning rod 33.

[0029] Two fixed bars 15 are fixedly installed on the outer surface of the fixed tube 1, and a moving bar 16 is slidably installed in the fixed bar 15, and the upper surface of the moving bar 16 is fixedly connected to the lower surface of the mounting plate 3. Two first screws 21 are rotatably installed in the mounting plate 2, and the moving bar 16 is threadedly connected on the first screw 21 to drive the mounting plate 3 to move. When in use, the moving bar 16 is moved by the rotation of the first screw 21, and the mounting plate 3 is moved by the movement of the moving bar 16.

[0030] By adopting the above technical solution, the first screw rod 21 can drive the mounting plate 3 to move.

[0031] Two bevel gear rods 23 are rotatably installed in the mounting plate 2, and a first bevel gear 22 is fixedly installed at the center of the bottom end of the first screw rod 21, and the first bevel gear 22 is meshed with one end of the bevel gear rod 23. A rotating rod 24 is rotatably installed in the mounting plate 2, and two second bevel gears 25 are fixedly installed on the outer surface of the rotating rod 24, and one end of the bevel gear rod 23 away from the first bevel gear 22 is meshed with the second bevel gear 25, which is used to drive the first screw rod 21 to rotate. When in use, the second bevel gear 25 is rotated by the rotation of the rotating rod 24, the bevel gear rod 23 is rotated by the rotation of the second bevel gear 25, the first bevel gear 22 is rotated by the rotation of the bevel gear rod 23, and the first screw rod 21 is rotated by the rotation of the first bevel gear 22.

[0032] By adopting the above technical solution, the rotating rod 24 can drive the first screw rod 21 to rotate.

[0033] A sewage pipe 14 is fixedly mounted on the lower surface of the filter tube 13 , and a valve is provided on the outer surface of the sewage pipe 14 to control the opening or closing of the sewage pipe 14 .

[0034] By adopting the above technical solution, the valve can control the opening or closing of the sewage pipe 14.

[0035] Working principle: First, when the liquid enters the fixed tube 1 through the water inlet pipe 11, the impurities in the liquid are filtered through the filter tube 13 inside the fixed tube 1, so that the impurities in the liquid remain inside the filter tube 13, and the filtered liquid enters the main body 4 through the water outlet pipe 12 for detection, so as to prevent the impurities in the liquid from causing damage to the main body 4, thereby protecting the main body 4;

[0036] Secondly, when the filter tube 13 needs to be cleaned, the motor 31 is turned on to drive the connecting plate 32 to rotate, and the cleaning rod 33 is driven to rotate by the rotation of the connecting plate 32. At this time, the outer surface of the cleaning rod 33 contacts the inner wall of the filter tube 13, thereby cleaning the filter tube 13. After the cleaning is completed, the valve is opened to discharge the sewage and impurities through the sewage pipe 14;

[0037] Then, when the cleaning rod 33 needs to be repaired, the rotation of the rotating rod 24 drives the second bevel gear 25 to rotate, and the rotation of the second bevel gear 25 drives the bevel gear rod 23 to rotate, and the rotation of the bevel gear rod 23 drives the first bevel gear 22 to rotate, and the rotation of the first bevel gear 22 drives the first screw rod 21 to rotate, and the rotation of the first screw rod 21 drives the moving bar 16 to move, and the movement of the moving bar 16 drives the mounting plate 3 to move, and the movement of the mounting plate 3 drives the connecting plate 32 to move, and the movement of the connecting plate 32 drives the cleaning rod 33 to move, so that the cleaning rod 33 is moved out of the fixed tube 1, which is convenient for repair and replacement of the cleaning rod 33;

[0038] Finally, when the filter tube 13 needs to be replaced, the rotation of the rotating rod 29 drives the fourth bevel gear 291 to rotate, and the rotation of the fourth bevel gear 291 drives the third bevel gear 281 to rotate, and the rotation of the third bevel gear 281 drives the double-headed screw 28 to rotate, and the rotation of the double-headed screw 28 drives the slider 27 to move, and the movement of the slider 27 drives the movable plate 26 to move, so that the upper surface of the movable plate 26 and the lower surface of the filter tube 13 are not in contact. At this time, the filter tube 13 can be moved, and the filter tube 13 can be pulled out, so that the filter tube 13 can be replaced conveniently.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A differential pressure transmitter with a protection mechanism, comprising a fixed tube (1), characterized in that: The outer surface of the fixed pipe (1) is fixedly mounted with an inlet pipe (11) and an outlet pipe (12); the end of the outlet pipe (12) away from the fixed pipe (1) is fixedly mounted with a main body (4); a filter pipe (13) is detachably mounted inside the fixed pipe (1); a mounting plate (2) is fixedly mounted on the lower surface of the fixed pipe (1); two movable plates (26) are slidably mounted on the lower surface of the mounting plate (2); and the upper surface of the movable plate (26) is in active contact with the lower surface of the filter pipe (13); the upper surface of the fixed pipe (1) is in active contact with a mounting plate (3); a connecting plate (32) is rotatably mounted on the lower surface of the mounting plate (3); a cleaning rod (33) is detachably mounted inside the connecting plate (32); and the outer surface of the cleaning rod (33) is in active contact with the inner wall of the filter pipe (13).

2. A differential pressure transmitter with a protection mechanism as claimed in claim 1, characterized in that: Two sliders (27) are fixedly mounted on the upper surface of the movable plate (26), and the sliders (27) are slidably arranged inside the mounting plate (2). Two double-headed screws (28) are rotatably mounted inside the mounting plate (2), and the two sliders (27) are threadedly connected to the double-headed screws (28).

3. A differential pressure transmitter with a protection mechanism as claimed in claim 2, characterized in that: A rotating rod (29) is rotatably mounted inside the mounting plate (2), two fourth bevel gears (291) are fixedly mounted on the outer surface of the rotating rod (29), and a third bevel gear (281) is fixedly mounted at the center of one end of the two double-headed screws (28) close to the rotating rod (29), and the third bevel gear (281) and the fourth bevel gear (291) are meshed.

4. A differential pressure transmitter with a protection mechanism as claimed in claim 1, characterized in that: A motor (31) is fixedly mounted on the upper surface of the mounting plate (3), and the center of the bottom end of the output shaft of the motor (31) is fixedly connected to the connecting plate (32).

5. A differential pressure transmitter with a protection mechanism as claimed in claim 1, characterized in that: A second screw rod (34) is rotatably mounted on the outer surface of the connecting disk (32), and the second screw rod (34) rotatably penetrates the connecting disk (32) and the cleaning rod (33). A nut (35) is threadedly connected to the second screw rod (34), and the nut (35) is in movable contact with the outer surface of the connecting disk (32).

6. A differential pressure transmitter with a protection mechanism as claimed in claim 1, characterized in that: Two fixed bars (15) are fixedly installed on the outer surface of the fixed tube (1), a moving bar (16) is slidably installed inside the fixed bar (15), and the upper surface of the moving bar (16) is fixedly connected to the lower surface of the mounting plate (3), and two first screw rods (21) are rotatably installed inside the mounting plate (2), and the moving bar (16) is threadedly connected to the first screw rods (21).

7. A differential pressure transmitter with a protection mechanism as claimed in claim 6, characterized in that: Two bevel gear rods (23) are rotatably mounted in the mounting plate (2); a first bevel gear (22) is fixedly mounted at the center of the bottom end of the first screw rod (21); the first bevel gear (22) is meshed with one end of the bevel gear rod (23); a rotating rod (24) is rotatably mounted in the mounting plate (2); two second bevel gears (25) are fixedly mounted on the outer surface of the rotating rod (24); and one end of the bevel gear rod (23) away from the first bevel gear (22) is meshed with the second bevel gear (25).

8. A differential pressure transmitter with a protection mechanism as claimed in claim 1, characterized in that: A sewage discharge pipe (14) is fixedly mounted on the lower surface of the filter tube (13), and a valve is provided on the outer surface of the sewage discharge pipe (14).

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