Device for preventing false liquid level of instrument

Abstract

The utility model relates to the field of instruments, and discloses a device for preventing false liquid level of an instrument, which comprises a shell, a limit rod and a float bowl, the limit rod is fixedly mounted in the middle of the shell, the float bowl is sleeved on the outer surface of the limit rod, an electromagnet is fixedly mounted on the inner top wall of the shell, and a support frame is fixedly mounted on the upper surface of the float bowl. A scraper is rotationally connected to the middle of the supporting frame, a supporting ring is arranged below the end, away from the limiting rod, of the scraper, a top head is arranged on the inner ring, located below the scraper, of the supporting ring, and a permanent magnet attracted to the electromagnet is fixedly installed on the upper surface of the supporting ring; according to the device for preventing the false liquid level of the instrument, by electrifying an electromagnet, a supporting ring can be attracted to move upwards, then a scraping plate can be extruded to swing, the scraping plate makes contact with a limiting rod, water is injected into a shell through a sewage draining outlet, a floating barrel ascends, and crystals on the surface of the limiting rod can be scraped off by the scraping plate in the ascending process; therefore, friction with the buoy can be reduced, and false liquid level can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of instruments, in particular to a device for preventing false liquid levels in instruments. Background Art

[0002] In daily production, materials in containers often contain particulate impurities or are prone to crystallization. These solid particles can easily block the instrument detection parts as the materials flow, leading to false liquid levels and large deviations in the instrument display, affecting the operator's ability to make correct judgments, resulting in misoperation, causing the system to deviate from the optimized state, and causing safety accidents due to incorrect operations.

[0003] An existing patent for a device for preventing false liquid level in an instrument (201320597399.7) discloses "including a connecting rod and a cleaning head fixed to the front end of the connecting rod, a hole is opened at the bottom of the side of the short-circuit, and the front part of the connecting rod is inserted into the short-circuit from the hole. The contact part between the hole and the connecting rod adopts a mechanical seal or a packing seal. The short-circuit is set to an upward slope to give the fluid a certain flow space, which can effectively control the accumulation of most impurities. The mechanical cleaning device can move horizontally." However, this solution can only discharge impurities at the bottom. Since a limiting component is set on the float in the float-type liquid level gauge, the component is prone to adhere to crystals, increasing the friction between the float and the float, resulting in a false liquid level, and this solution cannot clean the limiting component. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a device for preventing false liquid levels in instruments, which has the advantages of cleaning crystals of limit components and solves the problem of false liquid levels caused by increased friction.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device to prevent false liquid level of the instrument, including a shell, a limit rod and a float, the limit rod is fixedly installed in the middle of the shell, the float is sleeved on the outer surface of the limit rod, the inner top wall of the shell is fixedly installed with an electromagnet, the upper surface of the float is fixedly installed with a support frame, the middle part of the support frame is rotatably connected with a scraper, a support ring is arranged below the end of the scraper away from the limit rod, the inner ring of the support ring is located below the scraper and a head is arranged, the upper surface of the support ring is fixedly installed with a permanent magnet attracted by the electromagnet, and the support ring is slidably connected with the float.

[0008] In some embodiments, the number of the scrapers is multiple, and the multiple scrapers are distributed in a circular array.

[0009] In some embodiments, a torsion spring is fixedly sleeved on one end of the hinge shaft of the scraper, and the torsion spring is fixedly connected to the support frame. A protrusion is provided on the other end of the hinge shaft, and the support frame is provided with a semi-annular groove adapted to the protrusion.

[0010] In some embodiments, a sleeve is fixedly mounted on the upper surface of the float, a limiting column is slidably connected inside the sleeve, and the limiting column is fixedly connected to the support ring.

[0011] In some embodiments, the bottom end of the buoy is in an arc shape, and a blade is fixedly mounted on the bottom end of the buoy.

[0012] In some embodiments, the diameter of the through hole in the middle of the float is larger than the diameter of the limiting rod, and the notch of the scraper is the same as the diameter of the limiting rod.

[0013] In some embodiments, the sleeve and the limiting column are fixedly connected via a tension spring, and the tension spring is sleeved inside the sleeve.

[0014] In some embodiments, the upper cut surface of the top head is located above the permanent magnet, and the end of the scraper away from the limiting rod is chamfered.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a device for preventing false liquid level of the instrument, which has the following beneficial effects:

[0017] 1. The device for preventing false liquid level of the instrument can attract the support ring to move upward by energizing the electromagnet, and then squeeze the scraper to swing, so that the scraper contacts the limit rod, and water is injected into the shell through the sewage outlet to make the float rise. During the rising process, the scraper can scrape off the crystals on the surface of the limit rod, thereby reducing the friction between the scraper and the float to avoid false liquid level.

[0018] 2. The device for preventing false liquid level of the instrument has a torsion spring fixedly sleeved on one end of the hinge shaft of the scraper, and the torsion spring is fixedly connected to the support frame. The hinge shaft at the other end is provided with a protrusion, and the support frame is provided with a semi-annular groove adapted to the protrusion. Through such an arrangement, the initial position of the scraper can be maintained at a position where it does not contact the limit rod, thereby reducing the friction with the limit rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the buoy of the utility model;

[0021] Figure 3 This is a schematic diagram of the support ring connection of the utility model;

[0022] Figure 4 This is a half-section schematic diagram of the buoy of the utility model;

[0023] Figure 5 This is a schematic diagram of the scraper connection of the utility model.

[0024] In the figure:

[0025] 1. Shell; 2. Limit rod; 3. Float; 4. Electromagnet; 5. Support frame; 6. Scraper; 7. Support ring; 8. Head; 9. Permanent magnet; 10. Torsion spring; 11. Protrusion; 12. Semi-ring groove; 13. Sleeve; 14. Limit column; 15. Blade; 16. Tension spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the related art, only the impurities at the bottom can be discharged. Since a limit component is provided on the float in the float-type liquid level gauge, the component is prone to crystallization, which increases the friction between the float and the float and causes a false liquid level. However, this solution cannot clean the limit component.

[0030] In order to solve the problems in the related technology to a certain extent, the embodiment of the present application provides a device to prevent false liquid level of the instrument. When it is needed, it only needs to energize the electromagnet so that the scraper 6 can swing so that the scraper 6 can fit with the limit rod 2 and move up and down through the float 3 to scrape off the crystals on the surface of the limit rod 2.

[0031] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0032] Combination Figure 1-Figure 5 The embodiment of the present application provides a device for preventing false liquid level of an instrument, including a shell 1, a limit rod 2 and a float 3. The limit rod 2 is fixedly installed in the middle of the shell 1, and the float 3 is sleeved on the outer surface of the limit rod 2. An electromagnet 4 is fixedly installed on the inner top wall of the shell 1, and a support frame 5 is fixedly installed on the upper surface of the float 3. A scraper 6 is rotatably connected to the middle of the support frame 5. A support ring 7 is arranged below the end of the scraper 6 away from the limit rod 2. A head 8 is arranged on the inner ring of the support ring 7 below the scraper 6. A permanent magnet 9 attracted by the electromagnet 4 is fixedly installed on the upper surface of the support ring 7. The support ring 7 is slidably connected to the float 3.

[0033] In some embodiments, there are multiple scrapers 6 , which are distributed in a circular array. Such an arrangement enables the scrapers 6 to clean the circumferential surface of the limiting rod 2 .

[0034] In some embodiments, a torsion spring 10 is fixedly sleeved on one end of the hinge shaft of the scraper 6, and the torsion spring 10 is fixedly connected to the support frame 5. The hinge shaft at the other end is provided with a protrusion 11, and the support frame 5 is provided with a semi-annular groove 12 adapted to the protrusion 11. Through such a setting, the initial position of the scraper 6 can be maintained at a position where it does not contact the limit rod 2, thereby reducing the friction with the limit rod 2.

[0035] Specifically, a sleeve 13 is fixedly installed on the upper surface of the buoy 3, a limiting column 14 is slidably connected inside the sleeve 13, and the limiting column 14 is fixedly connected to the supporting ring 7. This arrangement can limit the supporting ring 7 from sliding up and down.

[0036] In some embodiments, the bottom end of the buoy 3 is in an arc shape, and a blade 15 is fixedly mounted on the bottom end of the buoy 3. This arrangement enables the buoy 3 to rotate to avoid contact with the limit rod 2 at the same position.

[0037] Specifically, the diameter of the through hole in the middle of the buoy 3 is larger than the diameter of the limiting rod 2 , and the notch of the scraper 6 has the same diameter as the limiting rod 2 . This arrangement can reduce the contact with the limiting rod 2 .

[0038] Specifically, the sleeve 13 and the limiting column 14 are fixedly connected via a tension spring 16 , and the tension spring 16 is sleeved inside the sleeve 13 . Such an arrangement can achieve automatic resetting.

[0039] Specifically, by energizing the electromagnet 4, the support ring 7 can be attracted to move upward, and then the scraper 6 can be squeezed to swing, so that the scraper 6 contacts the limit rod 2, and water is injected into the outer shell 1 through the sewage outlet to make the float 3 rise. During the rising process, the scraper 6 can scrape off the crystals on the surface of the limit rod 2, thereby reducing the friction between the scraper 6 and the float 3 to avoid the occurrence of false liquid level.

[0040] The upper cut surface of the plug 8 is located above the permanent magnet 9, and the end of the scraper 6 away from the limiting rod 2 is chamfered. This arrangement ensures that the plug 8 first contacts the scraper 6 during the upward movement of the support ring 7.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0042] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing false liquid level of an instrument, comprising a housing (1), a limit rod (2) and a float (3), characterized in that: The limit rod (2) is fixedly mounted in the middle of the housing (1), the float (3) is sleeved on the outer surface of the limit rod (2), and an electromagnet (4) is fixedly mounted on the inner top wall of the housing (1); A support frame (5) is fixedly mounted on the upper surface of the float (3), a scraper (6) is rotatably connected to the middle of the support frame (5), a support ring (7) is arranged below the end of the scraper (6) away from the limiting rod (2), a top head (8) is arranged on the inner ring of the support ring (7) below the scraper (6), a permanent magnet (9) attracted by the electromagnet (4) is fixedly mounted on the upper surface of the support ring (7), and the support ring (7) is slidably connected to the float (3).

2. A device for preventing false liquid level of an instrument according to claim 1, characterized in that: The scrapers (6) are multiple in number, and the multiple scrapers (6) are distributed in a ring array.

3. A device for preventing false liquid level of an instrument according to claim 1, characterized in that: A torsion spring (10) is fixedly sleeved on one end of the hinge shaft of the scraper (6), and the torsion spring (10) is fixedly connected to the support frame (5). The hinge shaft at the other end is provided with a protrusion (11), and the support frame (5) is provided with a semi-annular groove (12) adapted to the protrusion (11).

4. A device for preventing false liquid level of an instrument according to claim 1, characterized in that: A sleeve (13) is fixedly mounted on the upper surface of the buoy (3), a limiting column (14) is slidably connected inside the sleeve (13), and the limiting column (14) is fixedly connected to the supporting ring (7).

5. The device for preventing false liquid level of an instrument according to claim 1, characterized in that: The bottom end of the buoy (3) is in the shape of an arc, and a blade (15) is fixedly mounted on the bottom end of the buoy (3).

6. The device for preventing false liquid level of an instrument according to claim 1, characterized in that: The diameter of the through hole in the middle of the float (3) is larger than the diameter of the limiting rod (2), and the notch of the scraper (6) has the same diameter as the limiting rod (2).

7. A device for preventing false liquid level of an instrument according to claim 4, characterized in that: The sleeve (13) and the limiting column (14) are fixedly connected via a tension spring (16), and the tension spring (16) is sleeved inside the sleeve (13).

8. The device for preventing false liquid level of an instrument according to claim 1, characterized in that: The upper cut surface of the top head (8) is located above the permanent magnet (9), and the end of the scraper (6) away from the limiting rod (2) is chamfered.

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