Differential pressure type liquid level transmitter

Abstract

The utility model belongs to the technical field of liquid level transmitters, and discloses a differential pressure type liquid level transmitter which comprises a connecting pipe, a mounting plate is fixedly arranged on the upper surface of the connecting pipe, a transmitter body is mounted on the upper surface of the mounting plate, and a mounting pipe is connected to the end, away from the transmitter body, of the connecting pipe. The mounting pipe is communicated with the connecting pipe, a sensor is arranged in the mounting pipe, a filter screen is mounted on the inner wall of the mounting pipe, and a connecting assembly used for being connected with the filter screen is arranged on the mounting pipe and the filter screen together. The method has the effect of the influence probability of the sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid level transmitter technical field, especially relate to a differential pressure type liquid level transmitter. BACKGROUND

[0002] Liquid level transmitter, also called liquid level meter, is a kind of pressure sensor for measuring liquid level. It is based on the principle that the static pressure of the measured liquid is proportional to the height of the liquid, that is, using diffusion silicon sensitive element or ceramic capacitor pressure sensitive sensor to convert static pressure into electrical signal, and then through temperature compensation and linear correction to convert into standard electrical signal. Liquid level transmitter is widely used in liquid level measurement of various media in petrochemical, metallurgy, electric power, pharmaceutical, water supply and drainage, environmental protection and other systems and industries.

[0003] For the related technology in the above, the inventor believes that the following defects exist: the existing liquid level transmitter is used by water flow into the liquid level transmitter inside. Then, through the internal sensor, the static pressure is converted into an electrical signal, and then through temperature compensation and linear correction to convert into a standard electrical signal. In this process, the water flow into the internal will bring impurities, and the impurities will affect the working state of the sensor. UTILITY MODEL CONTENT

[0004] In order to solve the above problems, the utility model provides a differential pressure type liquid level transmitter.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a differential pressure type liquid level transmitter, comprising a connecting pipe, a mounting plate is fixedly arranged on the upper surface of the connecting pipe, a transmitter body is installed on the upper surface of the mounting plate, an installation pipe is connected to the end of the connecting pipe away from the transmitter body, the installation pipe and the connecting pipe are in communication with each other, a sensor is arranged in the installation pipe, a filter screen is installed on the inner wall of the installation pipe, and a connecting assembly for connecting the filter screen is arranged on the installation pipe and the filter screen.

[0006] By adopting the above technical scheme, when the staff uses the liquid level transmitter, the water flow flows into the installation pipe. At this time, the sensor in the installation pipe converts the static pressure into an electrical signal, and then through temperature compensation and linear correction to convert into a standard electrical signal. In this process, the filter screen filters the impurities in the water, thereby reducing the probability of affecting the sensor by the impurities in the water.

[0007] Further, a fixing groove is formed on the outer wall of the filter screen, a sliding groove is formed on the inner wall of the installation pipe, the sliding groove is opposite to the fixing groove, the connecting assembly comprises a sliding rod slidingly arranged in the sliding groove and a first spring fixedly arranged on the sliding rod away from the side wall of the fixing groove, the other end of the first spring is fixedly arranged on the inner wall of the sliding groove, and the sliding rod is slidingly connected with the fixing groove.

[0008] Further, the inner top wall of the sliding groove is provided with a movable slot, the upper surface of the sliding rod is provided with a clamping slot, and the movable slot is slidably provided with a movable rod.

[0009] By adopting the above technical scheme, when the staff needs to clean the filter screen, the staff needs to slide the movable rod away from the sliding rod, so that the movable rod and the sliding rod are separated from each other. At this time, the sliding rod slides away from the fixed slot under the action of the first spring, so that the sliding rod and the fixed slot are separated from each other. At this time, the staff can take out the filter screen to clean it. Then, when the staff needs to install the filter screen, the staff slides the filter screen into the installation pipe so that the fixed slot and the sliding groove are opposite. At this time, the staff slides the movable rod towards the sliding rod, so that the movable rod gradually approaches and finally abuts against the first inclined surface, so that the sliding rod slides towards the fixed slot under the action of the movable rod, and then one end of the sliding rod slides into the fixed slot, so that the sliding rod fixes the filter screen, and then the filter screen is installed in the installation pipe.

[0010] Further, the side wall of the installation pipe is symmetrically provided with a rotating seat, the rotating seat is rotatably provided with a rotating rod, and the side wall of the movable rod is provided with a connecting slot, and the rotating rod and the connecting slot are matched with each other.

[0011] Further, the inner wall of the rotating seat is provided with a rotating slot, the inner wall of the rotating slot is provided with a reset slot, the rotating slot is rotatably provided with a rotating shaft, the rotating shaft and the rotating rod are fixedly connected with each other, the side wall of the rotating shaft is fixedly provided with a torsion spring, and the other end of the torsion spring is fixedly arranged on the inner wall of the reset slot.

[0012] By adopting the above technical scheme, when one end of the sliding rod slides into the fixed slot, the rotating rod and the connecting slot are opposite, so that the rotating shaft rotates under the action of the torsion spring, so that the rotating rod rotates under the action of the rotating shaft, and then the rotating rod rotates into the connecting slot, so that the side wall of the rotating rod abuts against the inner wall of the connecting slot, and then the movable rod is fixed, so that the probability of the movable rod sliding and separating from the sliding rod when subjected to external force is reduced, and the probability of the sliding rod and the fixed slot separating from each other is reduced, thereby improving the stability of the device.

[0013] Further, the outer wall of the filter screen is provided with a limiting slot, the inner wall of the installation pipe is fixedly provided with a limiting piece, and the limiting piece and the limiting slot are matched with each other.

[0014] By adopting the technical scheme, when the staff installs the filter screen into the installation rod, the staff needs to align the limiting piece with the limiting groove. Then, the staff slides the filter screen into the installation pipe, and in the process, the limiting piece and the filter screen slide relative to each other, thereby reducing the probability of rotation of the filter screen in the sliding process, thereby improving the stability of the device. In addition, the difficulty of aligning the sliding groove with the fixed groove is also reduced, thereby reducing the work difficulty of the staff.

[0015] Further, the inner wall of the installation pipe is fixedly provided with a limiting plate, and the side wall of the limiting plate abuts against the side wall of the filter screen.

[0016] By adopting the technical scheme, when the side wall of the filter screen abuts against the side wall of the limiting plate, the sliding groove is aligned with the fixed groove, thereby further reducing the difficulty of aligning the sliding groove with the fixed groove by the staff, thereby reducing the work difficulty of the staff.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. In the application, when the staff uses the liquid level transmitter, the water flows into the installation pipe. At this time, the sensor in the installation pipe converts the static pressure into an electric signal, and then through temperature compensation and linear correction, it is converted into a standard electric signal. In the process, the filter screen filters the impurities in the water, thereby reducing the probability of the sensor being affected by the impurities in the water.

[0019] 2. In the application, when the staff needs to clean the filter screen, the staff needs to slide the movable rod away from the sliding rod, thereby separating the movable rod and the sliding rod. At this time, the sliding rod slides away from the fixed groove under the action of the first spring, thereby separating the sliding rod and the fixed groove. At this time, the staff can take out the filter screen to clean it. Then, when the staff needs to install the filter screen, the staff slides the filter screen into the installation pipe to align the fixed groove with the sliding groove. At this time, the staff slides the movable rod towards the sliding rod, thereby gradually approaching the first inclined surface and finally abutting against it, so that the sliding rod slides towards the fixed groove under the action of the movable rod, thereby sliding one end of the sliding rod into the fixed groove, so that the sliding rod fixes the filter screen, thereby installing the filter screen in the installation pipe.

[0020] 3、The utility model discloses when one end of the slide bar slides into the fixed groove, the rotating rod is opposite with the connecting groove, and then the rotating shaft rotates under the action of the torsional spring, so that the rotating rod rotates under the action of the rotating shaft, and then the rotating rod rotates into the connecting groove, so that the side wall of the rotating rod abuts against the inner wall of the connecting groove, and then the movable rod is fixed, thereby reducing the probability that the movable rod slides and separates from the slide bar when the movable rod is subjected to external force, thereby reducing the probability that the slide bar separates from the fixed groove, and thereby improving the stability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the whole structure schematic diagram of the embodiment of the utility model;

[0022] Figure 2 It is Figure 1 It is the amplification structure schematic diagram of A in the utility model;

[0023] Figure 3 It is the cross section structure schematic diagram of connecting assembly in the embodiment of the utility model;

[0024] Figure 4 It is the cross section structure schematic diagram of rotating seat and rotating shaft in the embodiment of the utility model.

[0025] In the drawing: 1, connecting pipe;11, mounting plate;12, transmitter body;13, mounting pipe;14, filter screen;2, fixed groove;21, sliding groove;22, movable groove;23, clamping groove;24, connecting groove;25, rotating groove;26, reset groove;27, limiting groove;3, connecting assembly;31, slide bar;32, first spring;4, movable rod;41, first inclined surface;5, rotating seat;51, rotating rod;6, rotating shaft;61, torsional spring;7, limiting piece;8, limiting plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application;Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments;Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0027] As Figures 1-4As shown, the embodiment of the present application discloses a differential pressure type liquid level transmitter, which comprises a connecting pipe 1, a mounting plate 11, a transmitter body 12, a mounting pipe 13, a filter screen 14, a connecting assembly 3, a movable rod 4, a rotating seat 5, a rotating rod 51, a rotating shaft 6, a torsional spring 61 and a limiting piece 7. The connecting pipe 1 is in a circular tube structure, and its axis is vertical. The mounting plate 11 is in a circular plate structure, and its axis coincides with the axis of the connecting pipe 1. The mounting plate 11 is fixedly arranged on the upper surface of the connecting pipe 1. The transmitter body 12 is arranged on the upper surface of the mounting plate 11. The mounting pipe 13 is in a circular tube structure, and its axis is horizontal. The mounting pipe 13 is connected to one end of the connecting pipe 1 away from the transmitter body 12. The mounting pipe 13 is in communication with the connecting pipe 1. A sensor (not shown in the figure) is arranged in the mounting pipe 13. The filter screen 14 is arranged on the inner wall of the mounting pipe 13, and is used for filtering impurities in water.

[0028] When the staff uses the liquid level transmitter, water flows into the mounting pipe 13. At this time, the sensor in the mounting pipe 13 converts the static pressure into an electric signal, and then converts it into a standard electric signal through temperature compensation and linear correction. In this process, the filter screen 14 filters the impurities in the water, thereby reducing the probability of affecting the sensor by the impurities in the water.

[0029] A fixing groove 2 is formed in the outer wall of the filter screen 14. A sliding groove 21 is formed in the inner wall of the mounting pipe 13, and is opposite to the fixing groove. The connecting assembly 3 is arranged on the mounting pipe 13 and the filter screen 14, and is used for connecting the filter screen 14. The connecting assembly 3 comprises a sliding rod 31 and a first spring 32. The sliding rod 31 is in a rectangular rod structure, and is slidably arranged in the sliding groove 21. The sliding rod 31 is slidably connected with the fixing groove 2. One end of the first spring 32 is fixedly arranged on the side wall of the sliding rod 31 away from the fixing groove 2. The other end of the first spring 32 is fixedly arranged on the inner wall of the sliding groove 21.

[0030] An active groove 22 is formed in the inner top wall of the sliding groove 21. A clamping groove 23 is formed in the upper surface of the sliding rod 31. A first inclined surface 41 is formed on the edge where the upper surface of the sliding rod 31 intersects with the inner wall of the clamping groove 23.

[0031] When the worker needs to clean the filter screen 14, the worker needs to slide the movable rod 4 away from the sliding rod 31, so that the movable rod 4 and the sliding rod 31 are separated from each other. At this time, the sliding rod 31 slides away from the fixed groove 2 under the action of the first spring 32, so that the sliding rod 31 and the fixed groove 2 are separated from each other. At this time, the worker can take out the filter screen 14 to clean the filter screen 14. Subsequently, when the worker needs to install the filter screen 14, the worker slides the filter screen 14 into the installation pipe 13 so that the fixed groove 2 and the sliding groove 21 are opposite. At this time, the worker slides the movable rod 4 towards the sliding rod 31, so that the movable rod 4 gradually approaches and finally abuts against the first inclined surface 41, so that the sliding rod 31 slides towards the fixed groove 2 under the action of the movable rod 4, and then one end of the sliding rod 31 slides into the fixed groove 2, so that the sliding rod 31 fixes the filter screen 14, and then the filter screen 14 is installed in the installation pipe 13.

[0032] The rotating seat 5 is symmetrically arranged on the side wall of the installation pipe 13, the rotating rod 51 is rotatably arranged on the rotating seat 5, the connecting groove 24 is arranged on the side wall of the movable rod 4, and the rotating rod 51 and the connecting groove 24 are matched with each other.

[0033] The rotating groove 25 is arranged on the inner wall of the rotating seat 5, and the reset groove 26 is arranged on the inner wall of the rotating groove 25. The rotating shaft 6 is a circular rod structure, and the axis thereof is horizontal. The rotating shaft 6 is rotatably arranged in the rotating shaft 6, and the rotating shaft 6 and the rotating rod 51 are fixed with each other. One end of the torsional spring 61 is fixedly arranged on the side wall of the rotating shaft 6, and the other end of the torsional spring 61 is fixedly arranged on the inner wall of the reset groove 26.

[0034] When one end of the sliding rod 31 slides into the fixed groove 2, the rotating rod 51 is opposite to the connecting groove 24, so that the rotating shaft 6 rotates under the action of the torsional spring 61, so that the rotating rod 51 rotates under the action of the rotating shaft 6, and then the rotating rod 51 rotates into the connecting groove 24, so that the side wall of the rotating rod 51 abuts against the inner wall of the connecting groove 24, and then the movable rod 4 is fixed, so that the probability that the movable rod 4 slides and separates from the sliding rod 31 when subjected to an external force is reduced, and then the probability that the sliding rod 31 separates from the fixed groove 2 is reduced, so that the stability of the device is improved.

[0035] The limiting groove 27 is arranged on the outer wall of the filter screen 14, and the limiting piece 7 is fixedly arranged on the inner wall of the installation pipe 13, and the limiting piece 7 and the limiting groove 27 are matched with each other.

[0036] When the worker needs to install the filter screen 14 into the installation rod, the worker needs to align the limiting piece 7 with the limiting groove 27. Then, the worker slides the filter screen 14 into the installation pipe 13, in the process, the limiting piece 7 and the filter screen 14 slide relative to each other, thereby reducing the probability of the filter screen 14 rotating in the sliding process, thereby improving the stability of the device. In addition, it also reduces the difficulty of the worker aligning the sliding groove 21 with the fixed groove 2, thereby reducing the work difficulty of the worker.

[0037] In order to reduce the work difficulty of the worker, the inner wall of the installation pipe 13 is fixedly provided with a limiting plate 8, and the side wall of the limiting plate 8 and the side wall of the filter screen 14 abut each other. When the side wall of the filter screen 14 abuts against the side wall of the limiting plate 8, the sliding groove 21 is aligned with the fixed groove 2, thereby further reducing the difficulty of the worker aligning the sliding groove 21 with the fixed groove 2, thereby reducing the work difficulty of the worker.

[0038] The use principle of the differential pressure type liquid level transmitter in the embodiment is as follows: when the worker uses the liquid level transmitter, the water flow flows into the installation pipe 13. At this time, the sensor in the installation pipe 13 converts the static pressure into an electric signal, and then converts it into a standard electric signal through temperature compensation and linear correction, in the process, the filter screen 14 filters the impurities in the water, thereby reducing the probability of the sensor being affected by the impurities in the water.

[0039] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A differential pressure level transmitter, comprising a connecting pipe (1), characterized in that: A mounting plate (11) is fixedly provided on the upper surface of the connecting pipe (1), and a transmitter body (12) is installed on the upper surface of the mounting plate (11). The end of the connecting pipe (1) away from the transmitter body (12) is connected to a mounting pipe (13). The mounting pipe (13) is connected to the connecting pipe (1). A sensor is provided inside the mounting pipe (13). A filter screen (14) is installed on the inner wall of the mounting pipe (13). A connecting component (3) for connecting the filter screen (14) is provided on the mounting pipe (13) and the filter screen (14).

2. A differential pressure level transmitter according to claim 1, characterized in that: The filter screen (14) has a fixing groove (2) on its outer wall and a sliding groove (21) on its inner wall. The sliding groove (21) is directly opposite the mounting groove. The connecting assembly (3) includes a sliding rod (31) slidably disposed in the sliding groove (21) and a first spring (32) fixedly disposed on the side wall of the sliding rod (31) away from the fixing groove (2). The other end of the first spring (32) is fixedly disposed on the inner wall of the sliding groove (21). The sliding rod (31) is slidably connected to the fixing groove (2).

3. A differential pressure level transmitter according to claim 2, characterized in that: The inner top wall of the slide groove (21) is provided with a movable groove (22), the upper surface of the slide rod (31) is provided with a slot (23), the movable rod (4) is slidably arranged in the movable groove (22), and the edge where the upper surface of the slide rod (31) intersects with the inner wall of the slot (23) is provided with a first inclined surface (41).

4. A differential pressure level transmitter according to claim 3, characterized in that: A rotating seat (5) is symmetrically arranged on the side wall of the mounting tube (13). A rotating rod (51) is rotatably arranged on the rotating seat (5). A connecting groove (24) is opened on the side wall of the movable rod (4). The rotating rod (51) and the connecting groove (24) are matched with each other.

5. A differential pressure level transmitter according to claim 4, characterized in that: The inner wall of the rotating seat (5) is provided with a rotating groove (25), and the inner wall of the rotating groove (25) is provided with a reset groove (26). A rotating shaft (6) is rotatably arranged in the rotating groove (25). The rotating shaft (6) is fixed to the rotating rod (51). A torsion spring (61) is fixedly arranged on the side wall of the rotating shaft (6). The other end of the torsion spring (61) is fixedly arranged on the inner wall of the reset groove (26).

6. A differential pressure level transmitter according to claim 1, characterized in that: A limiting groove (27) is provided on the outer wall of the filter screen (14), and a limiting component (7) is fixedly provided on the inner wall of the mounting tube (13). The limiting component (7) matches the limiting groove (27).

7. A differential pressure level transmitter according to claim 1, characterized in that: A limiting plate (8) is fixedly installed on the inner wall of the installation tube (13), and the side wall of the limiting plate (8) abuts against the side wall of the filter screen (14).

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