Liquid level sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a liquid level sensor. A measuring rod is fixed between the bottom covers, a floating ball is movably arranged on the measuring rod, an upper check ring is fixed on the upper portion of the measuring rod, a lower check ring is fixed on the lower portion of the measuring rod, the floating ball is located between the upper check ring and the lower check ring, a sleeve is fixed between the mounting seat and the bottom covers, the measuring rod and the floating ball are located in the sleeve, and liquid inlet holes are formed in the bottom covers. According to the utility model, the floating ball is not influenced by liquid fluctuation through the sleeve, and the stability of measurement is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field, especially a liquid level sensor. BACKGROUND

[0002] The existing liquid level sensor is installed in the box, and the change of liquid level drives the change of high and low positions of the floating ball, but for some fields, the liquid in the box will fluctuate, thereby affecting the floating ball and the accuracy of measurement.

[0003] Therefore, based on the defects of the existing liquid level sensor, the existing liquid level sensor needs to be improved. CONTENT

[0004] The utility model discloses a liquid level sensor which solves the defects of the existing liquid level sensor, such as the influence of liquid fluctuation on measurement.

[0005] To achieve the above object, the utility model is realized through the following technical scheme.

[0006] A liquid level sensor, comprising a mounting seat, a bottom cover, a measuring rod fixed between the bottom covers, a floating ball movably arranged on the measuring rod, an upper stop ring fixed to the upper part of the measuring rod and a lower stop ring fixed to the lower part of the measuring rod, the floating ball being located between the upper stop ring and the lower stop ring, a sleeve fixed between the mounting seat and the bottom cover, the measuring rod and the floating ball being located in the sleeve, and a liquid inlet hole formed in the bottom cover.

[0007] Further, the outer diameter of the floating ball is smaller than the inner diameter of the sleeve, so that the floating ball can move smoothly up and down.

[0008] Further, the side surface of the lower stop ring protrudes radially to form a protruding block, and the outer end of the protruding block is in contact with the inner wall of the sleeve, so that the measuring rod can be centrally positioned.

[0009] Further, an exhaust hole is formed in the upper part of the sleeve, so that the sleeve can be exhausted.

[0010] Further, a liquid discharge hole is formed in the lower part of the sleeve, so that the sleeve can be discharged.

[0011] Further, the bottom of the mounting seat is concavely formed with a lower convex ring, a wiring hole is formed in the middle part of the lower convex ring, the wiring hole has an internal thread, the upper part of the measuring rod has an external thread, the upper part of the measuring rod is fixed in the wiring hole, and the lower end of the connector seat is embedded in the wiring hole, so that the measuring rod can be quickly installed through threaded connection.

[0012] Further, the bottom of the lower convex ring is concavely formed with a bottom convex ring, and the top of the sleeve is sleeved outside the bottom convex ring, so that the sleeve can be quickly positioned.

[0013] Further, the lower end of the measuring rod is fixed with a screw rod, the lower end of the screw rod is fixed with a lock nut after penetrating through the bottom cover, the sleeve can be disassembled, and cleaning can be performed.

[0014] Further, the top of the mounting seat is protruded to form a fence, the inner side of the fence extends an inner extension, one end of the inner extension extends to the side to form a side extension, the mounting seat can be rotated by the abutting action of the rotating tool and the inner extension and the side extension, the sensor can be fixed on the external box or disassembled.

[0015] The beneficial effect of the utility model lies in that the sleeve can make the float ball not affected by liquid fluctuation, and ensure the stability of measurement. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0017] Figure 2 It is a local structure schematic view of the utility model.

[0018] Figure 3 It is a sectional view schematic view of the utility model.

[0019] Label and explanation:

[0020] Mounting seat 1, bottom cover 2, measuring rod 3, float ball 4, upper check ring 5, lower check ring 6, sleeve 7, liquid inlet hole 8, protruding block 9, exhaust hole 10, liquid outlet hole 11, screw rod 12, lock nut 13, lower protruding ring 14, wiring hole 15, connector seat 16, fence 17, inner extension 18, side extension 19, bottom protruding ring 20, sealing ring 21. PREFERRED EMBODIMENT

[0021] The utility model will be further described below in combination with the drawings.

[0022] See Figure 1 --- Figure 3 The utility model discloses a liquid level sensor, which comprises a mounting seat 1 and a bottom cover 2, the bottom cover 2 is fixed with a measuring rod 3, the measuring rod 3 is movably provided with a float ball 4, the upper part of the measuring rod 3 is fixed with an upper check ring 5, and the lower part is fixed with a lower check ring 6, the float ball 4 is located between the upper check ring 5 and the lower check ring 6, the upper check ring 5 is used for positioning a high liquid level value, and the lower check ring 6 is used for positioning a low liquid level value.

[0023] The bottom cover 2 of the utility model is provided with a liquid inlet hole 8, and liquid enters the sleeve 7 from the liquid inlet hole 8 and contacts the float ball 4.

[0024] The side surface of the lower blocking ring 6 is radially protruded to form protruding blocks 9, the protruding blocks 9 are three, are centrally symmetrically arranged, the outer end of the protruding block 9 is in contact with the inner wall of the sleeve 7, so that the measuring rod 3 is installed at the central position of the sleeve 7.

[0025] The upper portion of the sleeve 7 is provided with an exhaust hole 10, the exhaust hole 10 is used for exhaust in the sleeve 7, and the exhaust hole 10 is located at the upper portion of the upper blocking ring 5.

[0026] The lower portion of the sleeve 7 is provided with a liquid discharge hole 11, liquid in the sleeve 7 can flow out from the liquid discharge hole 11, and the liquid discharge hole 11 is located at the lower portion of the lower blocking ring 6.

[0027] The lower end of the measuring rod 3 is fixedly connected with a screw rod 12, and the lower end of the screw rod 12 is fixedly connected with a lock nut 13 after penetrating through the bottom cover 2. The bottom cover 2, the measuring rod 3 and the sleeve 7 can be fixed by the lock nut 13, and the sleeve 7 can be disassembled and cleaned by removing the lock nut 13.

[0028] The mounting seat 1 is made of aluminum material, the bottom of the mounting seat 1 is formed by downward protrusion to form a lower protruding ring 14, the middle portion of the lower protruding ring 14 is provided with a wiring hole 15, the wiring hole 15 is provided with an internal thread, the upper portion of the measuring rod 3 is provided with an external thread, the upper portion of the measuring rod 3 is fixedly connected in the wiring hole 15, and the lower end of the connector seat 16 is embedded in the wiring hole 15.

[0029] The bottom of the lower protruding ring 14 is formed by downward protrusion to form a bottom protruding ring 20, the top of the sleeve 7 is sleeved outside the bottom protruding ring 20, and the positioning of the sleeve 7 is realized.

[0030] The lower protruding ring 14 is provided with a sealing ring 21, and the lower protruding ring 14 is provided with an external thread, and the liquid level sensor is fixed in the external box through the external thread.

[0031] The top of the mounting seat 1 is formed by protrusion to form a surrounding block 17, the inner side of the surrounding block 17 is provided with an arc-shaped edge, the inner side of the surrounding block 17 extends an inner extending part 18, and one end of the inner extending part 18 extends to the side surface to form a side extending part 19. The inner extending part 18 and the side extending part 19 can position the rotating tool, so that the mounting seat 1 is rotatably fixed on the external box by the rotating tool, or is disassembled from the external box.

[0032] Of course, the above-mentioned embodiments are only preferred examples of the utility model, and are not limited to the scope of the utility model, so that equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope should be included in the utility model patent application scope.

Claims

1. A liquid level sensor, characterized by: The utility model relates to a liquid level measuring device, including mounting seat, bottom cover, fixed with measuring rod between bottom cover, the movable setting of float ball is arranged on measuring rod, the upper portion of measuring rod is fixed with upper check ring, and the lower portion is fixed with lower check ring, and float ball is located between upper check ring and lower check ring, fixed with sleeve between mounting seat and bottom cover, and measuring rod and float ball are located in sleeve, and bottom cover is set with liquid inlet hole.

2. A liquid level sensor according to claim 1, characterised in that: The outer diameter of the float ball is less than the inner diameter of the sleeve.

3. A liquid level sensor according to claim 1, wherein: The side of the lower check ring is radially convex and forms a convex block, and the outer end of the convex block is in contact with the inner wall of the sleeve.

4. A liquid level sensor according to claim 1, wherein: The upper portion of the sleeve is provided with an exhaust hole, and the exhaust hole is located above the upper check ring.

5. The liquid level sensor of claim 1, wherein: The lower portion of the sleeve is provided with a liquid outlet hole.

6. A liquid level sensor according to claim 1, wherein: The bottom of the mounting seat is convexly formed with a lower convex ring, the middle portion of the lower convex ring is provided with a wiring hole, the wiring hole has an internal thread, the upper portion of the measuring rod has an external thread, the upper portion of the measuring rod is fixed in the wiring hole, and the lower end of the connector seat is embedded in the wiring hole.

7. A liquid level sensor according to claim 6, characterised in that: The bottom of the lower convex ring is convexly formed with a bottom convex ring, and the top of the sleeve is sleeved outside the bottom convex ring.

8. The liquid level sensor of claim 1, wherein: The lower end of the measuring rod is fixed with a screw rod, and the lower end of the screw rod is fixed with a lock nut after penetrating through the bottom cover.

9. A liquid level sensor according to claim 6, wherein: The top of the mounting seat is convexly formed with a surrounding barrier, the inner side of the surrounding barrier extends an inner extension, and one end of the inner extension extends to the side to form a side extension.

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