Contact type liquid level sensor

Abstract

The utility model discloses a contact type liquid level sensor which comprises a detection probe, an upper protective cylinder and a lower protective cylinder, the lower protective cylinder is sleeved with a sleeve, the bottom of the lower protective cylinder is fixedly connected with an installation ring, a containing groove is formed in the installation ring, a water absorption piece is installed in the containing groove, and the water absorption piece is fixedly connected with the sleeve. A connecting ring is installed at the bottom end of the lower protection cylinder, and a liquid scraping ring is fixedly connected into the connecting ring. The detection probe is taken out by pulling the connecting line upwards, when the detection probe moves upwards, the detection probe firstly makes contact with the liquid scraping ring, liquid on the outer surface of the detection probe is preliminarily scraped off through the liquid scraping ring, then the detection probe gradually ascends and enters and penetrates through the water absorption piece, and residual liquid outside the detection probe is absorbed through the water absorption piece; therefore, liquid removal of the whole detection probe is completed, damage to equipment and personnel in the surrounding environment when the probe attached with harmful liquid is moved out is avoided, and the use safety of the contact type liquid level sensor is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level sensors, in particular to a contact type liquid level sensor. Background Art

[0002] The liquid level sensor is a pressure sensor that measures the liquid level. The static pressure immersion level transmitter is based on the principle that the static pressure of the measured liquid is proportional to the height of the liquid. It uses an isolated diffused silicon sensitive element or a ceramic capacitor pressure sensitive sensor to convert the static pressure into an electrical signal, which is then converted into a standard electrical signal after temperature compensation and linear correction. It is suitable for the liquid level measurement of various media in systems and industries such as petrochemicals, metallurgy, electricity, pharmaceuticals, water supply and drainage, and environmental protection.

[0003] Most of the existing liquid level sensors do not have a self-cleaning function. When a fault occurs and the detection probe is taken out for inspection or maintenance, a portion of the detected liquid will adhere to the surface of the probe. When the detection probe is used for liquids with high risk, corrosive or other chemical components, the liquid carried out poses a safety hazard, which is not only easy to bring danger to the operator, but also causes corrosion to the outside of the equipment or other objects.

[0004] Therefore, it is necessary to provide a contact type liquid level sensor to solve the above technical problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a contact type liquid level sensor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a contact liquid level sensor, including a detection probe, an upper casing and a lower casing, the outer part of the lower casing is provided with a sleeve through a mounting groove, the bottom of the lower casing is fixedly connected with a mounting ring, the interior of the mounting ring is provided with a placement groove, the interior of the placement groove is provided with a water absorbent, the bottom end of the lower casing is provided with a connecting ring, the interior of the connecting ring is fixedly connected with a scraper ring, the interior of the upper casing and the lower casing are provided with a wire groove, the diameter of the upper casing and the lower casing are the same, and the mounting ring is located at the lower casing. The inner wall of the cylinder is installed near the top end, and the scraper ring is a guide cone ring with a hollow interior, which is used to preliminarily scrape the liquid on the outside of the detection probe. The water absorbent can be any water absorbent component with water absorption performance and made of flexible material. The detection probe is taken out by pulling the connecting line upward. When the detection probe moves upward, it first contacts the scraper ring, and the liquid on the surface of the detection probe is preliminarily scraped off by the scraper ring. Then, as the detection probe gradually rises, it enters and passes through the interior of the water absorbent, and the remaining liquid on the outside of the detection probe is absorbed by the water absorbent, thereby completing the liquid removal of the entire detection probe.

[0007] As a further description of the above technical solution:

[0008] The outside of the sleeve is provided with three movable grooves, the inner walls of the three movable grooves are fixedly connected with springs, one end of the spring is fixedly connected with a clamping button, the clamping button is pushed to expand outward by the spring, and then abuts against the top of the inner wall of the detection equipment to position the liquid level sensor. Through the coordinated use of the spring, the clamping button and the fixing ring and the positioning ring, personnel can easily install the cleaning mechanism of the liquid level sensor without opening the equipment to be detected and without contacting the liquid in the equipment, which effectively improves the safety of the liquid level sensor during installation.

[0009] As a further description of the above technical solution:

[0010] The top of the lower casing is fixedly connected with a connecting tube, and the outside of the connecting tube is provided with a threaded structure.

[0011] As a further description of the above technical solution:

[0012] The outer portion and the inner wall of the upper protective tube are both provided with thread grooves, and the upper protective tube is threadedly connected with the connecting tube through the thread grooves on the inner wall.

[0013] As a further description of the above technical solution:

[0014] The outer sleeve of the upper protective tube is provided with a fixing ring, and the interior of the fixing ring is provided with a thread. The fixing ring is used to position the positioning ring against the outer surface of the device to be detected after the thread moves downward. When installing the sensor as a whole, the sleeve is inserted into the interior of the detection part, and then the fixing ring is screwed downward until the button abuts against the top of the inner wall of the detection part and stops.

[0015] As a further description of the above technical solution:

[0016] The outside of the fixing ring is fixedly connected with a positioning ring, and the cross section of the positioning ring is conical, and is a suction cup structure for adsorbing or supporting the fixing ring structure.

[0017] As a further description of the above technical solution:

[0018] A connecting wire is installed inside the detection probe, and the connecting wire passes through the lower protective tube and the upper protective tube.

[0019] The utility model has the following beneficial effects:

[0020] 1. Compared with the prior art, the contact liquid level sensor removes the detection probe by pulling the connecting line upwards. When the detection probe moves upwards, it first contacts the scraper ring, and the liquid on the surface of the detection probe is initially scraped off by the scraper ring. Then, as the detection probe gradually rises, it enters and passes through the inside of the water absorbent component, and the remaining liquid on the outside of the detection probe is absorbed by the water absorbent component, thereby completing the liquid removal of the entire detection probe, avoiding damage to the surrounding environment, equipment and personnel when the probe contaminated with harmful liquid is removed, and effectively improving the safety of the contact liquid level sensor.

[0021] 2. Compared with the prior art, the contact liquid level sensor, through the coordinated use of a spring, a button, a fixing ring and a positioning ring, enables personnel to easily install the cleaning mechanism of the liquid level sensor without opening the equipment to be tested and without contacting the liquid in the equipment, which effectively improves the safety of the liquid level sensor during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a contact type liquid level sensor proposed by the utility model;

[0023] Figure 2 This is a schematic diagram of the sleeve structure of a contact type liquid level sensor proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the overall disassembly structure of a contact type liquid level sensor proposed by the utility model;

[0025] Figure 4 The utility model is a schematic diagram of the water absorbing component structure of a contact type liquid level sensor.

[0026] Legend:

[0027] 1. Connecting wire; 2. Detection probe; 3. Thread; 4. Fixing ring; 5. Positioning ring; 6. Wire groove; 7. Thread groove; 8. Upper protective tube; 9. Connecting tube; 10. Lower protective tube; 11. Scraper ring; 12. Connecting ring; 13. Spring; 14. Button; 15. Mounting groove; 16. Sleeve; 17. Movable groove; 18. Placement groove; 19. Mounting ring; 20. Water absorbent. DETAILED DESCRIPTION

[0028] 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.

[0029] Reference Figure 1-4 The utility model provides a contact liquid level sensor: it includes a detection probe 2, an upper casing 8 and a lower casing 10, the outer part of the lower casing 10 is sleeved with a sleeve 16 through a mounting groove 15, the bottom of the lower casing 10 is fixedly connected with a mounting ring 19, the interior of the mounting ring 19 is provided with a placement groove 18, the interior of the placement groove 18 is provided with a water absorbent 20, the bottom end of the lower casing 10 is provided with a connecting ring 12, the interior of the connecting ring 12 is fixedly connected with a scraper ring 11, the interior of the upper casing 8 and the lower casing 10 are provided with a wire groove 6, the upper casing 8 and the lower casing 10 have the same diameter, the mounting ring 19 is located on the inner wall of the lower casing 10 and is installed near the top position, the scraper ring 11 is a guide cone ring with a hollow interior, which is used to preliminarily scrape the liquid outside the detection probe 2, and the water absorbent 20 can be any water absorbent component with water absorption performance and made of flexible materials.

[0030] The sleeve 16 is provided with three movable grooves 17 on its outside, and the inner walls of the three movable grooves 17 are fixedly connected with springs 13, one end of the spring 13 is fixedly connected with a button 14, and the button 14 is pushed outward by the spring 13 to abut against the top of the inner wall of the detection device to position the liquid level sensor.

[0031] The top of the lower casing 10 is fixedly connected with a connecting tube 9 , and the outside of the connecting tube 9 is provided with a threaded structure.

[0032] The outer portion and the inner wall of the upper casing 8 are both provided with thread grooves 7 , and the upper casing 8 is threadedly connected to the connecting tube 9 via the thread grooves 7 on the inner wall.

[0033] The upper casing 8 is externally sleeved with a fixing ring 4, the fixing ring 4 is internally provided with a thread 3, and the fixing ring 4 is used to position the positioning ring 5 against the outer surface of the device to be inspected after the thread moves downward.

[0034] The outside of the fixing ring 4 is fixedly connected with a positioning ring 5, and the cross-section of the positioning ring 5 is conical, and it is a suction cup structure for adsorbing or supporting the fixing ring 4 structure. When installing the sensor as a whole, the sleeve 16 is inserted into the interior of the detection part, and then the fixing ring 4 is screwed downward until the button 14 abuts against the top of the inner wall of the detection part and stops.

[0035] A connecting line 1 is installed inside the detection probe 2 , and the connecting line 1 passes through a lower protective tube 10 and an upper protective tube 8 . The inner diameter of the scraper ring 11 corresponds to the diameter of the detection probe 2 .

[0036] Working principle: When dismantling the liquid level sensor after use or troubleshooting, first remove the mechanism that seals and fixes the sensor, then pull the connecting line 1 upward to take out the detection probe 2. When the detection probe 2 moves upward, it first contacts the scraper ring 11, and the liquid on the surface of the detection probe 2 is initially scraped off by the scraper ring 11. Then, as the detection probe 2 gradually rises, it enters and passes through the interior of the water absorbent 20, and the remaining liquid on the outside of the detection probe 2 is absorbed by the water absorbent 20, thereby completing the liquid removal of the entire detection probe 2.

[0037] When installing the entire sensor, the sleeve 16 is inserted into the interior of the detection member, and then the fixing ring 4 is screwed downward until the button 14 abuts against the top of the inner wall of the detection member and stops.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A contact type liquid level sensor, comprising a detection probe (2), an upper casing (8) and a lower casing (10), characterized in that: The outer part of the lower casing (10) is sleeved with a sleeve (16) through a mounting groove (15); the bottom of the lower casing (10) is fixedly connected with a mounting ring (19); a placement groove (18) is provided inside the mounting ring (19); a water absorbing member (20) is installed inside the placement groove (18); a connecting ring (12) is installed at the bottom end of the lower casing (10); a liquid scraping ring (11) is fixedly connected inside the connecting ring (12); and a wire passing groove (6) is provided inside both the upper casing (8) and the lower casing (10).

2. A contact type liquid level sensor according to claim 1, characterized in that: The sleeve (16) is provided with three movable grooves (17) on its exterior, the inner walls of the three movable grooves (17) are all fixedly connected with springs (13), and one end of the spring (13) is fixedly connected with a locking button (14).

3. A contact type liquid level sensor according to claim 1, characterized in that: The top of the lower protective tube (10) is fixedly connected to a connecting tube (9), and the outside of the connecting tube (9) is provided with a threaded structure.

4. A contact type liquid level sensor according to claim 1, characterized in that: The outer portion and inner wall of the upper protective tube (8) are both provided with thread grooves (7).

5. The contact type liquid level sensor according to claim 1, characterized in that: The outer portion of the upper protective tube (8) is sleeved with a fixing ring (4), and the inner portion of the fixing ring (4) is provided with a thread (3).

6. A contact type liquid level sensor according to claim 5, characterized in that: The exterior of the fixing ring (4) is fixedly connected with a positioning ring (5).

7. A contact type liquid level sensor according to claim 1, characterized in that: A connecting wire (1) is installed inside the detection probe (2).

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