A vibration-proof dissolved oxygen detection device

Abstract

A vibration-proof dissolved oxygen detection device includes a photocell, a detection circuit board and an outer cylinder. The photocell is installed on one end of the detection circuit board. The device is characterized in that: it also includes a mounting sleeve and a fixing seat. The mounting sleeve is sleeved on the outside of the photocell; the fixing seat is provided with a mounting hole and a card slot; one end of the detection circuit board is inserted into the mounting hole and provided with a card strip, and the card strip is screwed into the card slot; the outer cylinder is sleeved on the outside of the detection circuit board, and one end thereof is detachably fixedly connected to the fixing seat. The device of the present invention is easy to install, and the connection structure is stable and reliable.

Description

Technical Field

[0001] The invention relates to the field of dissolved oxygen detection devices, in particular to a vibration-proof dissolved oxygen detection device. Background Art

[0002] Dissolved oxygen, as an important water quality indicator, plays an important role in both water quality evaluation and scientific research. How to accurately, continuously and quickly measure dissolved oxygen concentration has always been an important topic in analytical chemistry.

[0003] At present, the iodine titration method and its correction method and membrane electrode method are usually used to measure dissolved oxygen in water in China. The disadvantage of the iodine titration method is that it is easily interfered by oxidized organic matter and sulfide in water, and the experimental steps are cumbersome and difficult to achieve online monitoring; the disadvantage of the membrane electrode method is that it requires a certain flow rate of water, and the electrolyte and membrane need to be frequently replaced and calibrated, resulting in high maintenance costs and unstable online monitoring performance.

[0004] The fluorescence dissolved oxygen meter is based on the principle of quenching active fluorescence by specific substances in physics. Fluorescence measurement has high measurement accuracy and anti-interference ability, and the dissolved oxygen meter using this method has good repeatability and stability. However, the existing dissolved oxygen detection device includes a photocell and a circuit board, and the photocell is installed on the circuit board, and the circuit board is fixed in the cylinder by screws or adhesive. With this structure, the photocell and the circuit board have the problem of shaking during the installation process, and in a vibrating environment, the reliability and stability of the fixed structure are not enough to meet the stringent requirements of the photoelectric system, affecting the accuracy of the detection structure. Summary of the invention

[0005] The main purpose of the present invention is to overcome the above-mentioned defects in the prior art and to provide a vibration-proof dissolved oxygen detection device which is easy to install and has a stable and reliable connection structure.

[0006] The present invention adopts the following technical solution:

[0007] A vibration-proof dissolved oxygen detection device comprises a photocell, a detection circuit board and an outer cylinder, wherein the photocell is mounted on one end of the detection circuit board, and is characterized in that: it also comprises a mounting sleeve and a fixing seat, wherein the mounting sleeve is sleeved on the outside of the photocell; the fixing seat is provided with a mounting hole and a card slot; one end of the detection circuit board is inserted into the mounting hole and is provided with a card strip, and the card strip is screwed into the card slot; the outer cylinder is sleeved on the outside of the detection circuit board, and one end of the outer cylinder is detachably fixedly connected to the fixing seat.

[0008] Preferably, the mounting sleeve is provided with a recess and a protrusion, the protrusion is provided with an axially through hole, and the recess is provided with a groove; the photocell is installed in the hole; the detection circuit board is provided with a positioning portion, which is located in the recess and partially embedded in the groove.

[0009] Preferably, the recessed portion is provided with a first inclined surface extending in the radial direction, the positioning portion is correspondingly provided with a second inclined surface, the first inclined surface is opposite to the second inclined surface, and the groove is located at the outer end of the first inclined surface.

[0010] Preferably, the slot is provided at the top of the fixing seat.

[0011] Preferably, the clamping groove comprises a first groove and a second groove, the first groove extends in the axial direction, and the second groove is located at the bottom of the first groove and extends in the circumferential direction; the clamping strip passes through the first groove and is clamped in the second groove.

[0012] Preferably, there is a gap between the bottom surface of the second groove and the clamping strip.

[0013] Preferably, a cushion sleeve is further included, and the cushion sleeve is sleeved on the other end of the detection circuit board.

[0014] Preferably, the gasket is axially through-through, and a groove is provided on the inner side thereof, and the end of the detection circuit board is clamped in the groove.

[0015] Preferably, a pressing sleeve is further included, which is detachably fixed in the other end of the outer tube and presses the other end of the detection circuit board.

[0016] Preferably, the outer cylinder is threadedly connected to the fixing seat.

[0017] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The device of the present invention is provided with a mounting sleeve and a fixing seat. The mounting sleeve is arranged outside the photocell, and the fixing seat is used to fix the detection circuit board and the outer cylinder. This structure can avoid the shaking problem of the photocell and the circuit board during installation, and can ensure the reliability of use in a vibration environment.

[0019] 2. In the device of the present invention, the mounting sleeve is provided with a hole and a groove, the photocell is mounted in the hole, and the positioning portion of the detection circuit board is partially embedded in the groove, thereby achieving reliable positioning between the installed photocell and the detection circuit board to avoid relative vibration.

[0020] 3. The device of the present invention has a first groove and a second groove on the top of the fixing seat. The detection circuit board passes through the first groove and is clamped in the second groove through a clamping bar. With this fool-proof design, the clamping bar can only rotate in one direction, ensuring that the direction of the subsequent compression sleeve tightening operation is consistent with the rotation direction of the clamping bar.

[0021] 4. In the device of the present invention, there is a gap between the bottom surface of the second groove and the clamping strip, and a margin is provided to facilitate the subsequent clamping operation of the circuit board.

[0022] 5. The device of the present invention is provided with a cushion sleeve at the other end of the detection circuit board to reduce the shaking caused by the large friction when the pressing sleeve is finally tightened.

[0023] 6. The device of the present invention is provided with a pressing sleeve for pressing the gasket sleeve, and further pressing the detection circuit board, so that the connection between the detection circuit board and the fixing seat is more stable and reliable.

[0024] 7. The device of the present invention adopts a screw-free installation structure, which is simple and reliable to install and easy to disassemble and maintain. It meets the installation requirements in narrow spaces and can ensure reliability and stability when tightened, further meeting the stringent fixing stability requirements of the optoelectronic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An exploded view of the present invention;

[0026] Figure 2 A three-dimensional diagram of the mounting sleeve of the present invention;

[0027] Figure 3 A three-dimensional diagram of a fixing base of the present invention;

[0028] Figure 4 is a three-dimensional diagram of the cushion cover of the present invention;

[0029] Figure 5 A three-dimensional diagram of the pressing sleeve of the present invention;

[0030] Figure 6 It is a schematic diagram of the installation sleeve and the photocell assembly;

[0031] Figure 7 It is a schematic diagram of the assembly of the present invention;

[0032] Figure 8 for Figure 7 A magnified image of point A;

[0033] Fig. 9 Schematic diagram of loading the test circuit board into the outer cylinder;

[0034] Fig.10 It is a cross-sectional view of the present invention;

[0035] Among them: 10, photocell, 20, detection circuit board, 21, insertion part, 22, clamping strip, 23, positioning part, 24, second inclined surface, 30, mounting sleeve, 31, recess, 32, protrusion, 33, groove, 34, first inclined surface, 40, fixing seat, 41, first groove, 42, second groove, 43, mounting hole, 50, outer cylinder, 60, cushion sleeve, 61, groove, 70, pressing sleeve. DETAILED DESCRIPTION

[0036] The present invention is further described below through specific implementation modes.

[0037] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0038] In the description of this application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0040] See also Figures 1 to 10 A vibration-proof dissolved oxygen detection device includes a photocell 10, a detection circuit board 20, a mounting sleeve 30, a fixing seat 40 and an outer cylinder 50, etc. The photocell 10 is mounted on one end of the detection circuit board 20; the mounting sleeve 30 is sleeved outside the photocell 10; the fixing seat 40 is provided with a mounting hole 43 and a card slot; one end of the detection circuit board 20 is inserted into the mounting hole 43 and is provided with a card strip 22, and the card strip 22 is screwed into the card slot; the outer cylinder 50 is sleeved outside the detection circuit board 20, and one end of the outer cylinder 50 is detachably fixedly connected to the fixing seat 40.

[0041] Among them, a concave portion 31 and a convex portion 32 are provided on one side of the mounting sleeve 30, an axially through hole is provided on the convex portion 32, and a groove 33 is provided on the concave portion 31. The photocell 10 is installed in the hole of the convex portion 32, and the height of the photocell 10 can be equal to, less than, or greater than the depth of the hole. A notch and a positioning portion 23 are provided at one end of the detection circuit board 20, and the notch is used to connect and accommodate the photocell 10. The positioning portion 23 is located in the concave portion 31, and its end is partially embedded in the groove 33.

[0042] Specifically, the positioning portion 23 is provided with a second inclined surface 24, and the light source of the detection circuit board can be located at the second inclined surface 24. The recessed portion 31 is correspondingly provided with a first inclined surface 34 extending in the radial direction, and the first inclined surface 34 is opposite to the second inclined surface 24. The first inclined surface 34 can also be parallel to the light source and provided with a hole to meet the requirements of the optical path. The groove 33 of the recessed portion 31 is located at the outer end of the first inclined surface 34, and the outer end of the positioning portion 23 is embedded in the groove 33 to avoid circumferential movement between the two.

[0043] The mounting hole 43 of the fixing seat 40 is axially through, and a card slot is provided at the top thereof, and the card slot is used to position the detection circuit board 20. This end of the detection circuit board 20 is configured as an insertion portion 21, and the width of the insertion portion 21 is substantially the same as the diameter of the mounting hole 43. The card strips 22 are located on both sides of the insertion portion 21 and can be perpendicular to the insertion portion 21.

[0044] Specifically, the card slot includes a first slot 41 and a second slot 42, wherein the first slot 41 extends in the axial direction, and the second slot 42 is located at the bottom of the first slot 41 and extends in the circumferential direction. When the detection circuit board 20 is inserted into the mounting hole 43, the card strip 22 passes through the first slot 41 and is stuck in the second slot 42, thereby achieving relative fixation between the two. The number of the first slots 41 corresponds to the number of the card strips 22, which can be one, two or even three, and is set as needed.

[0045] Furthermore, there is a gap or a clearance between the bottom surface of the second groove 42 and the clamping strip 22, and there is a margin to facilitate the subsequent pressing operation. The shape of the second groove 42 is not limited, and can be set to an arc, a rectangle or other suitable shapes. The second groove 42 is a foolproof design, so that the clamping strip 22 can only rotate in one direction relative to the second groove 42, that is, the extension direction of the second groove 42 is consistent with the rotation and fixing direction between the outer cylinder 50 and the fixing seat 40.

[0046] The present invention also includes a gasket 60, which is sleeved on the other end of the detection circuit board 20. The gasket 60 is axially through, and a groove 61 is provided on its inner side. The edge of the end of the detection circuit board 20 can be stuck in the groove 61, that is, the inner diameter of the gasket 60 is smaller than the width of the corresponding end of the detection circuit board 20. The gasket 60 is made of Teflon (PTFE) material, which has an extremely low friction coefficient and can reduce the shaking of the compression sleeve 70 due to the large friction force when it is subsequently tightened. The gasket 60 of the present invention can also be made of other similar materials with a small friction coefficient, but is not limited to this.

[0047] The outer cylinder 50 is axially through and is threadedly connected to the fixing seat 40. That is, the fixing seat 40 is provided with an external thread, and the inner wall of one end of the outer cylinder 50 is correspondingly provided with an internal thread, and the fixing seat 40 is partially inserted into the end of the outer cylinder 50 and screwed and fixed.

[0048] Furthermore, a pressing sleeve 70 is also included, which is detachably fixed in the other end of the outer cylinder 50 and can press the other end of the detection circuit board 20. Specifically, the pressing sleeve 70 is also an axially through structure, which is threadedly connected to the inner wall of the outer cylinder 50, and by rotating and pressing the cushion sleeve 60, the detection circuit board 20 is further pressed, so that the connection between it and the fixing seat 40 is more stable and reliable.

[0049] In the present invention, the photocell 10 is used as a photoelectric detection device, and the detection circuit board 20 is a conventional dissolved oxygen detection circuit and is connected to the photocell to form a sensor circuit, and the detection is completed by photoelectric means. Both can use existing common electronic components and circuits.

[0050] The installation process of the device of the present invention is as follows:

[0051] First, the photovoltaic cell 10 is welded to the notch of the detection circuit board 20, and then the installation sleeve 30 is put on the outside of the photovoltaic cell 10, and the positioning portion 23 is partially inserted into the groove 33 of the recess 31. The insertion portion 21 of the detection circuit board 20 is inserted into the installation hole 43 of the fixing seat 40, and the clamping strip 22 is inserted into the first groove 41. The detection circuit board 20 is rotated so that the clamping strip 22 is clamped into the second groove 42. The cushion sleeve 60 is put on the other end of the detection circuit board 20, and then the detection circuit board 20 equipped with the above components is installed in the outer cylinder 50 and tightened so that the outer cylinder 50 is fixed to the fixing seat 40; finally, the pressing sleeve 70 is installed in the outer cylinder 50 and tightened, and the pressing sleeve 70 presses the cushion sleeve 60 and the detection circuit board 20, so that the detection circuit board 20 and the photovoltaic cell 10 are reliably and stably fixed.

[0052] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A vibration-proof dissolved oxygen detection device, comprising a photocell, a detection circuit board and an outer cylinder, wherein the photocell is mounted on one end of the detection circuit board, and characterized in that: It also includes a mounting sleeve and a fixing seat, wherein the mounting sleeve is mounted on the outside of the photocell; the fixing seat is provided with a mounting hole and a slot; one end of the detection circuit board is inserted into the mounting hole and is provided with a clip, and the clip is screwed into the slot; the outer cylinder is mounted on the outside of the detection circuit board, and one end of the outer cylinder is detachably fixedly connected to the fixing seat; the mounting sleeve is provided with a recess and a protrusion, the protrusion is provided with an axially through hole, and the recess is provided with a groove; the photocell is installed in the hole; the detection circuit board is provided with a positioning portion, which is located in the recess and partially embedded in the groove; it also includes a gasket and a pressing sleeve, the gasket sleeve is mounted on the other end of the detection circuit board, the gasket sleeve is axially through, and a groove is provided on its inner side, the end of the detection circuit board is stuck in the groove, the pressing sleeve is detachably fixed in the other end of the outer cylinder and presses the other end of the detection circuit board, and the outer cylinder is threadedly connected to the fixing seat.

2. A vibration-proof dissolved oxygen detection device as claimed in claim 1, characterized in that: The recessed portion is provided with a first inclined surface extending in the radial direction, and the positioning portion is correspondingly provided with a second inclined surface, the first inclined surface is opposite to the second inclined surface, and the groove is located at the outer end of the first inclined surface.

3. A vibration-proof dissolved oxygen detection device as claimed in claim 1, characterized in that: The top of the fixing seat is provided with the card slot.

4. A vibration-proof dissolved oxygen detection device as claimed in claim 1, characterized in that: The clamping slot comprises a first slot and a second slot, wherein the first slot extends in the axial direction, and the second slot is located at the bottom of the first slot and extends in the circumferential direction; the clamping strip passes through the first slot and is clamped in the second slot.

5. A vibration-proof dissolved oxygen detection device as claimed in claim 4, characterized in that: There is a gap between the bottom surface of the second groove and the clamping strip.

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