Laser ranging liquid level device

Abstract

The utility model belongs to the technical field of liquid level devices, and particularly relates to a laser ranging liquid level device which comprises a hollow pipe and a laser ranging module, and the laser ranging module is located in the hollow pipe and fixedly connected with the upper end of the hollow pipe. A floating ball is arranged in the hollow pipe; a vent hole is formed in the upper end of the hollow pipe; a limiting sliding sleeve is slidably connected into the hollow pipe and located below the laser ranging module. A conical through hole is formed in the limiting sliding sleeve, and a conical protrusion matched with the conical through hole is arranged at the upper end of the floating ball. An adjusting mechanism is arranged between the hollow pipe and the limiting sliding sleeve, and the position of the limiting sliding sleeve in the hollow pipe can be adjusted through the adjusting mechanism. And when the liquid level is ultrahigh, the conical bulge of the floating ball extends into the conical through hole, so that the possibility that the surface of the liquid level is in contact with the laser ranging module is reduced. Meanwhile, the height of the limiting sliding block can be adjusted according to actual conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid level devices, and in particular relates to a laser distance measuring liquid level device. Background Art

[0002] The laser level sensor is a non-contact, high-precision liquid level sensor based on the principle of optical detection. It uses a laser beam to measure the height of the liquid and has very good performance. The laser beam is very thin and can work normally even if the liquid level surface is extremely rough, and the receiving range is very wide.

[0003] The working principle of the laser level meter is to measure the height of the liquid by emitting a laser beam generated by a laser, and then receiving the reflected or scattered light after the laser beam passes through the liquid. The laser level meter controls the emission of the laser through electronic devices to generate a high-intensity laser beam. This laser beam enters the liquid container through a transparent window. After the laser beam enters the liquid, part of the laser beam is absorbed by the liquid, part of the laser beam is reflected by the liquid, and part of the laser beam is scattered by the liquid. The receiver of the laser level meter will receive the reflected or scattered light after passing through the liquid and convert it into an electrical signal. The height of the liquid is known by analyzing the received electrical signal.

[0004] The utility model with patent application number 202021474754.8 discloses a laser liquid level sensor, which is provided with a float ball, which floats on the liquid surface, so that it is not affected by solid impurities in the liquid or the viscosity of the liquid, greatly improving the measurement accuracy. During installation, it is necessary to ensure that the distance between the mounting plate and the liquid surface to be measured is not less than 200mm to prevent the liquid from contaminating the laser ranging module and causing damage to it. However, if the liquid level to be measured fluctuates or rises, it is easy for the liquid to contaminate the laser ranging module. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a laser ranging level meter, which can effectively reduce the possibility of liquid contamination of the laser ranging module through the cooperation of a float and a limit sleeve.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A laser ranging level device comprises a hollow tube and a laser ranging module, wherein the laser ranging module is located in the hollow tube; a float is arranged in the hollow tube; a vent is arranged at the upper end of the hollow tube; a limit sleeve is slidably connected in the hollow tube, and the limit sleeve is located below the laser ranging module; a conical through hole is arranged on the limit sleeve, and a conical protrusion matching with the conical through hole is arranged at the upper end of the float; an adjustment mechanism is arranged between the hollow tube and the limit sleeve, and the position of the limit sleeve in the hollow tube can be adjusted by the adjustment mechanism.

[0008] The outer sleeve of the laser ranging module is provided with a connecting tube, and the upper end of the limiting sliding sleeve is slidably connected to the connecting tube; the upper end of the connecting tube is provided with an air inlet hole, and the adjustment mechanism includes an adjusting sleeve and a top screw, and the adjusting sleeve is arranged outside the hollow tube and can move along the hollow tube; the hollow tube is provided with a connecting groove, and a connecting block is fixed on the adjusting sleeve, and the connecting block passes through the connecting groove and is fixedly connected to the limiting sliding sleeve; the top screw is threadedly connected to the adjusting sleeve, and the adjusting sleeve is provided with a corresponding threaded through hole.

[0009] The hollow tube is provided with a tooth groove, a compression spring is fixed on the adjusting sleeve, one end of the compression spring is fixedly connected to the adjusting sleeve, and the other end of the compression spring can extend out of the tooth groove; the end of the top wire can contact the lower part of the compression spring.

[0010] The lower end of the floating ball is hemispherical.

[0011] It also includes an extension tube, which is connected to the hollow tube through a thread, and a threaded sleeve is provided on the outer fixing sleeve at the upper end of the extension tube.

[0012] It also includes a mounting flange, and the upper end of the hollow tube is threadedly connected to the mounting flange; the laser ranging module is fixedly connected to the mounting flange.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] A conical through hole is provided on the limit sleeve, and a conical protrusion is provided on the upper end of the float ball to match the conical through hole. When the liquid level is too high, the conical protrusion of the float ball will extend into the conical through hole, thereby reducing the possibility of contact between the liquid level surface and the laser ranging module. At the same time, the height of the limit slider can be adjusted according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model in one direction;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model in another direction;

[0017] Figure 3 It is a half-section structural schematic diagram of the utility model;

[0018] Figure 4 yes Figure 3 A cross-sectional view;

[0019] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0020] Figure 6 It is a cross-sectional view of the tooth groove of the utility model;

[0021] Among them: 1 is a hollow tube, 2 is a laser ranging module, 200 is a connecting tube, 201 is an air inlet, 3 is a float, 4 is an air vent, 5 is a baffle, 6 is a limiting sliding sleeve, 7 is a conical through hole, 8 is a conical protrusion, 9 is an adjustment mechanism, 10 is an adjustment sleeve, 11 is a top screw, 12 is a connecting through groove, 13 is a connecting block, 14 is a tooth groove, 15 is a compression spring sheet, 16 is an extension tube, 17 is a threaded sleeve, and 18 is a mounting flange. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] A laser ranging level meter includes a hollow tube 1 and a laser ranging module 2, wherein the laser ranging module 2 is located in the hollow tube 1; a float 3 is provided in the hollow tube 1; and a vent 4 is provided at the upper end of the hollow tube 1. The above structural arrangement is the same as the structural arrangement in a laser liquid level sensor disclosed in the utility model with patent application number 202021474754.8; the main improvements of the liquid level meter are as follows:

[0024] like Figure 1-6 As shown, a limit sleeve 6 is slidably connected in the hollow tube 1, and the limit sleeve 6 is located below the laser ranging module 2; a conical through hole 7 is provided on the limit sleeve 6, and a conical protrusion 8 matching the conical through hole 7 is provided on the upper end of the float 3, and the conical protrusion 8 can extend into the conical through hole 7, and the outer surface of the conical protrusion 8 and the inner surface of the conical through hole 7 can fit together to play a sealing role.

[0025] Specifically: when the liquid level to be measured gradually rises, the float 3 rises until the conical protrusion 8 extends into the conical through hole 7, that is, the float 3 is restricted by the limiting sleeve 6 and cannot move upward, that is, the float 3 does not continue to rise with the increase of the liquid level; and the outer surface of the conical protrusion 8 fits the inner surface of the conical through hole 7, so the liquid in the hollow tube 1 cannot continue to move upward, thereby ensuring that when the liquid level is too high, the liquid level to be measured can still be prevented from contacting the laser ranging module 2, thereby protecting the laser ranging module 2.

[0026] When the liquid level moves down, the float 3 will move down with it, causing the conical protrusion 8 to move out of the conical through hole 7; usually, the liquid level is too high, and the outer surface of the conical protrusion 8 and the inner surface of the conical through hole 7 fit together and will not get stuck (i.e., they cannot move down); if this happens, the liquid level sensor needs to be dismantled for internal cleaning and maintenance, and the float 3 must be separated from the limit sleeve 6.

[0027] Meanwhile, an adjusting mechanism 9 is provided between the hollow tube 1 and the limiting sliding sleeve 6 , and the position of the limiting sliding sleeve 6 in the hollow tube 1 can be adjusted by the adjusting mechanism 9 .

[0028] Furthermore, the adjustment mechanism 9 specifically includes an adjustment sleeve 10 and a top screw 11. The adjustment sleeve 10 is sleeved outside the hollow tube 1 and can move along the hollow tube 1. The hollow tube 1 is provided with a connecting groove 12. A connecting block 13 is fixed on the adjustment sleeve 10. The connecting block 13 passes through the connecting groove 12 and is fixedly connected to the limit sleeve 6. A connecting pipe 200 is provided on the outer shell of the laser ranging module 2. The upper end of the limit sleeve 6 is slidably connected to the connecting pipe 200 (sliding seal).

[0029] This adjustment needs to be done before installing the liquid level meter. The specific adjustment method is as follows: by pushing the adjustment sleeve 10 to move up and down along the hollow tube 1, the adjustment sleeve 10 drives the limit sleeve 6 to move up and down through the connecting block 13; after adjustment, tighten the top screw 11, and the end of the top screw 11 passes through the threaded through hole and contacts the hollow tube 1. At the same time, the above-mentioned structural setting of the connecting pipe 200 is intended to achieve a sliding seal between the laser ranging module 2 and the limit sleeve 6; to prevent the liquid from entering the hollow tube 1 through the connecting groove 12 and causing contamination of the laser ranging device.

[0030] Specifically, when the liquid level is too high and the float 3 rises until the conical protrusion 8 extends into the conical through hole 7, a relatively independent space is formed between the conical protrusion 8, the limit sleeve 6, the connecting pipe 200 and the laser distance measuring device. Unless the liquid in the container is full and flows in through the air inlet 201, the laser distance measuring device will not be contaminated; and the liquid level usually does not reach such a height, so this situation can be basically ignored.

[0031] Furthermore, in order to better fix the position of the adjustment sleeve 10, a tooth groove 14 is provided on the hollow tube 1, and a compression spring 15 is fixed on the adjustment sleeve 10, one end of the compression spring 15 is fixedly connected to the adjustment sleeve 10, and the other end of the compression spring 15 can extend out of the tooth groove 14. After the height is adjusted, by tightening the top screw 11, the end of the top screw 11 contacts the lower part of the compression spring 15, pushing the other end of the compression spring 15 to move downward and extend into the tooth groove 14, thereby fixing the position of the adjustment sleeve 10.

[0032] Furthermore, the lower end of the float 3 is hemispherical.

[0033] Furthermore, in order to adjust the length of the hollow tube 1 according to actual conditions, an extension tube 16 is provided, and the extension tube 16 is connected to the hollow tube 1 through a thread, and a threaded sleeve 17 is provided on the upper end of the extension tube 16. The threaded sleeve 17 and the extension tube 16 can be fixed by welding, and are first sleeved outside the extension tube 16 and then welded.

[0034] Specifically, it also includes a baffle 5 (with an opening to block the float 3 to prevent it from falling). When an extension tube 16 is provided, the baffle 5 is threadedly connected to the lower end of the extension tube 16; otherwise, it is threadedly connected to the lower part of the hollow tube 1.

[0035] Furthermore, it also includes a mounting flange 18, the upper end of the hollow tube 1 is threadedly connected to the mounting flange 18; the laser distance measuring module 2 device is located in the hollow tube 1 and is fixedly connected to the mounting flange 18; the connecting pipe 200 is fixedly connected to the bottom of the mounting flange 18. The mounting flange 18 is provided to achieve the installation of the liquid level meter and the equipment (needing to measure the liquid level height). Specifically: the laser distance measuring module 2 device can be located in the hollow tube 1 in whole or in part.

[0036] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments.

Claims

1. A laser ranging level meter, comprising a hollow tube (1) and a laser ranging module (2), wherein the laser ranging module (2) is located in the hollow tube (1); a floating ball (3) is arranged in the hollow tube (1); a vent hole (4) is arranged at the upper end of the hollow tube (1); the characteristics are: A limit sleeve (6) is slidably connected inside the hollow tube (1), and the limit sleeve (6) is located below the laser distance measurement module (2); a conical through hole (7) is provided on the limit sleeve (6), and a conical protrusion (8) matching the conical through hole (7) is provided on the upper end of the float (3); an adjustment mechanism (9) is provided between the hollow tube (1) and the limit sleeve (6), and the position of the limit sleeve (6) in the hollow tube (1) can be adjusted by the adjustment mechanism (9).

2. A laser ranging liquid level device according to claim 1, characterized in that: The outer sleeve of the laser distance measuring module (2) is provided with a connecting tube (200), and the upper end of the limiting sliding sleeve (6) is slidably connected to the connecting tube (200); the upper end of the connecting tube (200) is provided with an air inlet hole (201); the adjusting mechanism (9) comprises an adjusting sleeve (10) and a top screw (11); the adjusting sleeve (10) is sleeved outside the hollow tube (1) and can move along the hollow tube (1); the hollow tube (1) is provided with a connecting through groove (12); a connecting block (13) is fixed on the adjusting sleeve (10), and the connecting block (13) passes through the connecting through groove (12) and is fixedly connected to the limiting sliding sleeve (6); the top screw (11) is threadedly connected to the adjusting sleeve (10), and a corresponding threaded through hole is provided on the adjusting sleeve (10).

3. A laser ranging liquid level device according to claim 2, characterized in that: The hollow tube (1) is provided with a tooth groove (14), and a compression spring (15) is fixed on the adjustment sleeve (10). One end of the compression spring (15) is fixedly connected to the adjustment sleeve (10), and the other end of the compression spring (15) can extend out of the tooth groove (14); the end of the top screw (11) can contact the lower part of the compression spring (15).

4. The laser ranging liquid level device according to claim 1, characterized in that: The lower end of the floating ball (3) is hemispherical.

5. The laser ranging liquid level device according to claim 1, characterized in that: It also comprises an extension tube (16), wherein the extension tube (16) is connected to the hollow tube (1) via a thread, and a threaded sleeve (17) is provided on the outer fixing sleeve at the upper end of the extension tube (16).

6. The laser ranging liquid level device according to claim 1, characterized in that: It also comprises a mounting flange (18), the upper end of the hollow tube (1) being threadedly connected to the mounting flange (18); and the laser distance measuring module (2) being fixedly connected to the mounting flange (18).

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