Probe protection device of dissolved oxygen instrument

Abstract

A probe protection device of a dissolved oxygen instrument comprises a probe body and a data line, the probe body is sleeved with a cylindrical shell, and the lower end of the probe body extends out of the cylindrical shell; the lower end of the cylindrical shell is detachably connected with a protective cover cylinder containing the lower end of the probe body, and a plurality of strip-shaped holes are uniformly formed in the outer circular surface of the protective cover cylinder; an impeller shell is concentrically arranged at the lower end of the protective cover cylinder, and a plurality of circulation openings are uniformly formed in the outer circular surface of the impeller shell; an impeller is rotationally arranged in the impeller shell, a rotating shaft extending into the protective cover cylinder is connected to the impeller, a cleaning strip is connected to the top end of the rotating shaft, and flexible bristles acting on the lower end of the probe body are arranged on the cleaning strip. The utility model solves the problems that the probe of the existing dissolved oxygen instrument is easy to wash by impurities in water and is damaged, and the measurement precision is reduced due to long-time measurement.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality monitoring equipment technical field, specifically disclose a kind of dissolved oxygen instrument's probe protection device. BACKGROUND

[0002] The determination of oxygen content in water has important significance in environmental water quality monitoring, wastewater treatment, freshwater aquaculture and other fields. Currently, the oxygen content in water is usually determined by dissolved oxygen instrument. However, the probe of traditional dissolved oxygen instrument has no protective structure design. When it is placed in water, it is easy to be damaged by the scouring action of impurities in water. In addition, small impurities and microorganisms in water are easy to adhere to the surface of the oxygen permeable membrane of the probe, resulting in poor accuracy of the actual determination of oxygen content in water.

[0003] The utility model patent with application number 2021226798723 discloses a dissolved oxygen instrument probe protection device, which includes a probe body inserted into the probe protection sleeve. The probe protection sleeve is composed of a plug sleeve, a limiting sleeve and a butt joint sleeve connected in order from top to bottom. The limiting sleeve has a gear sleeve inside the side wall of the probe body. A gear is arranged between the gear sleeve and the inner side wall of the limiting sleeve. The inner side wall of the limiting sleeve is provided with a gear pattern. The teeth of the gear are arranged in meshing relationship with the teeth of the gear sleeve and the gear pattern. The probe body is threaded through the gear sleeve. Although the gear sleeve and the gear pattern on the inner side wall of the limiting sleeve are linked by the setting of the gear sleeve, they can play a buffering protection role. However, since the lower end of the probe body is designed to be exposed, it is still easy to be scoured by impurities in water. In addition, if it is placed in water for a long time, microorganisms and small impurities in water will still adhere to the surface of the oxygen permeable membrane, causing large deviation in the actual determination of oxygen content in water. Therefore, in view of the above shortcomings of traditional dissolved oxygen instrument and existing dissolved oxygen instrument probe protection device, the present application proposes a dissolved oxygen instrument probe protection device that can effectively solve the technical problem. SUMMARY

[0004] The utility model aims to provide a dissolved oxygen instrument probe protection device to solve the problem that the probe of existing dissolved oxygen instrument is easy to be damaged by water impurities and long-term determination leads to decreased determination accuracy.

[0005] The utility model is achieved by the following technical solutions:

[0006] A kind of probe protection device of dissolved oxygen instrument, including probe body and data line, the probe body is sleeved with cylindrical shell, and the lower end of probe body extends out of cylindrical shell;The lower end of the cylindrical shell is detachably connected with the protective cover cylinder containing the lower end of probe body, a plurality of strip-shaped holes are uniformly provided on the outer circular surface of protective cover cylinder;Impeller housing is concentrically arranged at the lower end of protective cover cylinder, and a plurality of flow-through openings are uniformly provided on the outer circular surface of impeller housing;Impeller is rotatably arranged in impeller housing, and rotating shaft is connected to impeller and extends into protective cover cylinder, and cleaning strip is connected to the top end of rotating shaft, and flexible bristles that act on the lower end of probe body are arranged on cleaning strip.

[0007] Preferably, the outer surface of the protective cover cylinder is sleeved with an annular filter screen assembly.

[0008] Preferably, the annular filter screen assembly of the utility model comprises an upper ring body and a lower ring body, a plurality of vertical bars are uniformly arranged between the upper ring body and the lower ring body, a plurality of annular rings are arranged at intervals between the vertical bars, and the outer portion of the annular ring is covered with a filter screen.

[0009] Preferably, the outer circular surface of the protective cover cylinder is provided with a ring sleeve, a plurality of fastening bolts for clamping and fixing the upper ring body are uniformly arranged on the ring sleeve, and an annular groove for acting with the lower ring body is arranged on the upper surface of the impeller housing.

[0010] Preferably, the outer thread is arranged on the outer circular surface of the lower end of the cylindrical shell, and the inner thread is arranged on the inner wall of the upper end of the protective cover cylinder.

[0011] Preferably, the flow-through openings are arranged along the tangential direction of the impeller housing, and the blades on the impeller are arranged along the radial direction.

[0012] Preferably, the utility model is provided with a counterweight in the form of a cone at the center of the bottom wall of the impeller housing.

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

[0014] 1、The probe protection device of dissolved oxygen instrument of the utility model can effectively avoid the influence of impurities in water on the probe by detachably connecting a protective cover cylinder with strip-shaped holes at the lower end of the cylindrical shell;Meanwhile, according to the impurity condition in the water to be measured, an annular filter screen assembly can be sleeved to further filter the fine impurities in the water, so as to avoid the influence of fine impurities on the probe, thereby effectively improving the service life of the entire probe.

[0015] 2、The utility model further further sets up impeller casing and impeller in the protection cover barrel lower extreme, and connects a flexible cleaning mechanism acting on the probe body lower extreme through the rotating shaft on the impeller, when it is in water body for a long time, can drive the impeller and rotating shaft rotation by water flow effect, the lower end of probe body is cleaned through the flexible cleaning mechanism in the rotating shaft rotation process, avoids the impurity, microorganism adhesion on the oxygen -permeable membrane of probe body bottom, effectively improves the detection precision of probe long -term to water body oxygen content. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be needed to use the drawing of the embodiment to introduce briefly, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0017] Fig. 1 It is the external three-dimensional structure schematic diagram of embodiment 1 of the utility model;

[0018] Fig. 2 It is the three-dimensional explosion structure schematic diagram of embodiment 1 of the utility model;

[0019] Fig. 3 It is the internal structure schematic diagram of partial section in embodiment 1 of the utility model;

[0020] Fig. 4 It is the external three-dimensional structure schematic diagram of embodiment 2 of the utility model;

[0021] Fig. 5 It is the internal structure schematic diagram of partial section in embodiment 2 of the utility model. DETAILED DESCRIPTION

[0022] In order to make the personnel in the technical field better understand the scheme of the application, the following will be combined with the drawing in the embodiment of the application, and the technical scheme in the embodiment of the application is clearly and completely described, obviously, the described embodiment only is a part of the embodiment of the application, instead of all the embodiments.Based on the embodiment in the application, all other embodiments obtained by the ordinary skilled person in the art without making creative labor should belong to the scope of protection of the application.

[0023] It should be noted that, in the case of no conflict, the embodiment in the application and the features in the embodiment can be combined with each other. The following will be described in detail with reference to the drawings Figs. 1-5 of the application, and in combination with the embodiment.

[0024] Embodiment 1

[0025] Embodiment 1 discloses a probe protection device of a dissolved oxygen instrument, referring to the drawings Figs. 1-3 The main body of the device comprises a probe body 1, a data line 2 and a cylindrical shell 3 made of stainless steel, the probe body 1 is arranged in the cylindrical shell 3 and its bottom extends out of the lower end of the cylindrical shell 3, then the data line 2 is connected with the top end of the probe body 1.

[0026] An external thread 301 is turned on the outer circumferential surface of the lower end of the cylindrical shell 3, and a protective cover cylinder 4 is connected through the external thread 301, the protective cover cylinder 4 is detachably connected with the lower end of the cylindrical shell 3 through the internal thread 401 of the upper end inner wall. 4-10 strip-shaped holes 402 are uniformly arranged in a ring array on the outer circumferential surface of the protective cover cylinder 4, so that in the process of dissolved oxygen detection in the water body, the water body can enter the protective cover cylinder 4 through the strip-shaped holes 402 and contact the lower end of the probe body 1 to realize the detection of the dissolved oxygen content. At the same time, due to the existence of the protective cover cylinder 4, the scouring and damage of the lower end of the probe body 1 by large impurities in the water body can be avoided.

[0027] A impeller shell 5 is concentrically arranged at the lower end of the cylindrical shell 3, a plurality of flow ports 501 are arranged in a ring array on the outer circumferential surface of the impeller shell 5, and each flow port 501 is arranged along the tangent direction of the outer circumferential surface of the impeller shell 5. The impeller 6 is concentrically arranged in the impeller shell 5, and the blades 601 on the impeller 6 are arranged along the radial direction, so that the water flow entering the inside of the impeller shell 5 from the flow port 501 can act vertically on the blades 601, thereby enabling the impeller 6 to rotate under the action of the water flow.

[0028] A rotating shaft 7 vertically extending into the protective cover cylinder 4 is concentrically arranged on the impeller 6, and a sealing bearing acting on the rotating shaft 7 is arranged on the bottom wall of the cylindrical shell 3 and the impeller shell 5 to reduce the resistance in the rotating process of the rotating shaft 7, and then a cleaning strip 8 is connected to the top of the rotating shaft 7. A large number of flexible bristles 801 are arranged on the upper end of the cleaning strip 8, and the flexible bristles 801 are in contact with the oxygen-permeable film at the bottom of the probe body 1. Finally, a conical counterweight 9 is arranged at the center of the bottom wall of the impeller shell 5, so that the diving force of the entire probe can be increased under the action of the counterweight 9, and the deviation caused by the water flow can be reduced.

[0029] Embodiment 2

[0030] Embodiment 2 discloses a probe protection device of a dissolved oxygen instrument, which is optimized based on the technical scheme in Embodiment 1, and the same parts as Embodiment 1 will not be described again.

[0031] Reference is made to the drawings Fig. 4 and drawings Fig. 5The embodiment 2 is welded with a ring sleeve 10 on the outer circumferential surface of the cylindrical shell 3 above the external thread 301, and 3-6 fastening bolts 11 are uniformly arranged on the outer circumferential surface of the ring sleeve 10, each of which can be screwed into the ring sleeve 10 through the threaded hole on the ring sleeve 10. Meanwhile, a ring groove 502 aligned with the ring sleeve 10 is concentrically arranged on the upper surface of the impeller shell 5.

[0032] A ring filter assembly 12 is arranged between the ring sleeve 10 and the ring groove 502, which comprises an upper ring body 121 extending into the ring sleeve 10 and a lower ring body 122 extending into the ring groove 502, and the upper ring body 121 can be fixed by the circumferentially uniform fastening bolts 11 after extending into the ring sleeve 10. A plurality of vertical strips 123 arranged in the axial direction are uniformly arranged between the upper ring body 121 and the lower ring body 122, and a plurality of annular rings 124 are arranged between the vertical strips 123. The upper ring body 121, the lower ring body 122, the vertical strips 123 and the annular rings 124 form a filter outer frame, and a layer of filter screen (not shown in the figure) is coated on the outer circumferential surface of the filter outer frame. The filter screen can filter the fine impurities entering the cylindrical shell 3, avoid the fine impurities in the water body from polluting the lower end of the probe body 1, ensure the cleanliness in the detection process, and improve the detection accuracy.

[0033] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A probe protection device for a dissolved oxygen instrument, characterized by The probe body and the data line are included, the probe body is sleeved with the cylindrical shell, and the lower end of the probe body extends out of the cylindrical shell; the lower end of the cylindrical shell is detachably connected with a protective cover cylinder containing the lower end of the probe body, a plurality of strip-shaped holes are uniformly arranged on the outer circular surface of the protective cover cylinder; the lower end of the protective cover cylinder is concentrically provided with an impeller shell, a plurality of flow-through openings are uniformly arranged on the outer circular surface of the impeller shell; the impeller is rotatably arranged in the impeller shell, the rotating shaft extending into the protective cover cylinder is connected to the impeller, the top end of the rotating shaft is connected with a cleaning strip, and the flexible brush is arranged on the cleaning strip and acts on the lower end of the probe body.

2. The probe protection device for a dissolved oxygen instrument according to claim 1, characterized in that The outer surface of the protective cover cylinder is sleeved with an annular filter screen assembly.

3. The probe protection device for a dissolved oxygen instrument of claim 2, wherein The annular filter screen assembly includes an upper ring body and a lower ring body, a plurality of vertical strips are uniformly arranged between the upper ring body and the lower ring body, a plurality of annular rings are arranged at intervals between the plurality of vertical strips, and the outer portion of the annular ring is covered with a filter screen.

4. The probe protection device for a dissolved oxygen instrument of claim 1, wherein The outer circular surface of the protective cover cylinder is provided with a ring sleeve, a plurality of fastening bolts for clamping and fixing the upper ring body are uniformly arranged on the ring sleeve, and an annular groove for acting with the lower ring body is arranged on the upper surface of the impeller shell.

5. The probe protection apparatus for a dissolved oxygen instrument of claim 1, wherein The outer thread is arranged on the outer circular surface of the lower end of the cylindrical shell, and the inner thread is arranged on the inner wall of the upper end of the protective cover cylinder.

6. The probe protection apparatus for a dissolved oxygen instrument of claim 1, wherein The plurality of flow-through openings are arranged along the tangential direction of the impeller shell, and the blades on the impeller are arranged along the radial direction.

7. The probe protection apparatus for a dissolved oxygen instrument of claim 1, wherein The bottom wall of the impeller shell is provided with a weight block in the form of a cone at the center.

Images