Maintenance-free trace dissolved oxygen meter with measuring head convenient to replace

Abstract

The utility model relates to the field of trace dissolved oxygen meters, and discloses a maintenance-free trace dissolved oxygen meter with a measuring head convenient to replace, the maintenance-free trace dissolved oxygen meter comprises a machine body and a connecting block, one end of the machine body is electrically connected with a detector through a wire, and the top of the detector is provided with a detection probe in a threaded manner; the center of the detection probe and the center of the detector are located on the same straight line, a mounting groove is formed in the inner wall of the connecting block, a plurality of standby probes are clamped to the inner wall of the mounting groove, a limiting frame is rotationally installed on the surface of the connecting block, and one end of the connecting block is fixedly connected with the surface of the machine body. The surface of the detection probe is clamped with the inner wall of the mounting groove; the connecting block is mounted on the surface of the machine body, the mounting groove is formed in the inner wall of the connecting block, the standby probes are clamped to the inner wall of the mounting groove, and the limiting frame is rotationally connected to the surface of the connecting block, so that the standby probes can be conveniently placed by means of the connecting block, and the detection probes can be conveniently replaced during outdoor detection.

Description

TECHNICAL FIELD

[0001] The application relates to the field of micro dissolved oxygen meters, in particular to a maintenance-free micro dissolved oxygen meter facilitating replacement of a measuring head. BACKGROUND

[0002] A micro dissolved oxygen meter is an instrument for measuring the concentration of micro dissolved oxygen in water. Its basic principle is to measure the concentration of dissolved oxygen in water according to the chemical reaction of oxygen molecules with the surface of an electrode. A micro dissolved oxygen meter usually consists of an electrode, a temperature sensor and a display screen. The electrode is the core component of the micro dissolved oxygen meter, and its surface is coated with a layer of catalyst that can reduce oxygen molecules to hydroxyl ions through an electrochemical reaction, thereby generating an electric current. The concentration of dissolved oxygen in water can be calculated according to the size of the electric current. A conventional micro dissolved oxygen meter has a detector at one end of the body connected by a connecting line. The detector has a detection probe at one end. The detection probe is placed in the water source to measure the concentration of micro dissolved oxygen in the water.

[0003] According to the related technology in the above, the inventors believe that the measuring head of a conventional micro dissolved oxygen meter may gradually degrade in performance due to dirt accumulation, chemical corrosion or physical wear and tear after long-term use. Since the spare measuring head needs to be carried by the staff, some staff may forget to carry the spare measuring head when they go out to work, making it difficult to replace the measuring head when used outside.

[0004] The above information disclosed in the background art is only used to increase the understanding of the background art of the application, and therefore, it can include prior art known to those skilled in the art. CONTENT OF THE INVENTION

[0005] In order to solve the problem that the conventional micro dissolved oxygen meter is difficult to replace when measurement deviation occurs, the application provides a maintenance-free micro dissolved oxygen meter facilitating replacement of a measuring head.

[0006] The maintenance-free micro dissolved oxygen meter facilitating replacement of a measuring head provided by the application adopts the following technical solution:

[0007] A maintenance-free micro dissolved oxygen meter facilitating replacement of a measuring head comprises a body and a connecting block. One end of the body is electrically connected with a detector by a lead. A detection probe is screw-mounted on the top of the detector. The center of the detection probe and the center of the detector are on the same straight line. An installation groove is formed in the inner wall of the connecting block. A plurality of spare probes are clamped in the installation groove. A limiting frame is rotatably mounted on the surface of the connecting block. One end of the connecting block is fixedly connected with the surface of the body. The surface of the detection probe is clamped with the inner wall of the installation groove. One end of the limiting frame is clamped with the surface of the detection probe and the spare probes.

[0008] Preferably, one end of the limiting frame is fixedly provided with a spring, and the other end of the spring is fixedly connected with the inner wall of the connecting block.

[0009] Preferably, the surface of the limiting frame is fixedly provided with a pull block, and the cross section of the pull block is in the shape of an L.

[0010] Preferably, one end of the limiting frame is fixedly connected with an auxiliary sheet, the auxiliary sheet is a rubber sheet, and the size of the surface of the auxiliary sheet is matched with the size of the surface of the limiting frame.

[0011] Preferably, the bottom end of the connecting block is fixedly provided with a mounting frame, the surface of the mounting frame is rotatably connected with a fixing frame, the inner wall of the fixing frame is clamped with the surface of the detector, and the size of the inner wall of the fixing frame is matched with the size of the surface of the detector.

[0012] Preferably, two ends of the fixing frame close to each other are both fixedly provided with two suction plates, the two suction plates are symmetrically distributed about the fixing frame, the suction plates are magnetic plates, and the surface of the fixing frame is fixedly connected with a control block.

[0013] Preferably, the surface of the machine body is provided with two clamping grooves matched with the mounting frame, the inner wall of the clamping groove is clamped with the surface of the mounting frame, and the two clamping grooves are symmetrically distributed about the machine body.

[0014] In summary, the present application has the following beneficial technical effects:

[0015] 1. By installing the connecting block on the surface of the machine body, the inner wall of the connecting block is provided with a mounting groove, the inner wall of the mounting groove is clamped with a plurality of spare probes, and the surface of the connecting block is rotatably connected with a limiting frame, so as to place the spare probes by means of the connecting block, replace the detection probe when detecting outdoors, install a spring at one end of the limiting frame, connect one end of the spring with the inner wall of the connecting block, push the limiting frame by means of the spring, keep the limiting frame clamped with the surface of the spare probe and the detection probe, install a pull block on the surface of the limiting clamp, control the rotation of the limiting frame by means of the pull block, take out the spare probe from the mounting groove, install an auxiliary sheet made of rubber at one end of the limiting frame, and increase the friction between the limiting frame and the spare probe and the detection probe by means of the auxiliary sheet; compared with the prior art, the convenience of using the micro-dissolved oxygen meter is effectively improved.

[0016] 2. The mounting frame can be installed at the bottom end of the connecting block, the surface of the mounting frame is rotationally connected with a fixing frame, the inner wall of the fixing frame is clamped with the surface of the detector, so as to install the detector on the surface of the machine body by means of the fixing frame, facilitate the fixing of the detector when carrying out, one end of the two fixing frames is provided with a suction plate of magnetic material, and the surface of the fixing frame is provided with a control block, so as to connect the two fixing frames by means of the suction plate, and the fixing frame is convenient to disassemble by pulling the control block, the surface of the machine body is provided with a clamping groove, the inner wall of the clamping groove is clamped with the surface of the mounting frame, so as to install the fixing frame and the connecting block at one end of the machine body by means of the clamping groove and the clamping groove, and separate the mounting frame and the clamping groove, which is convenient for disassembling the device, so as to replace or clean the device; effectively improve the use effect of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram of the application embodiment of the maintenance-free micro-dissolved oxygen meter with convenient replacement of the measuring head;

[0018] Figure 2 is the connecting block structure schematic diagram of the application embodiment;

[0019] Figure 3 is the side view structure schematic diagram of the application embodiment;

[0020] Figure 4 is the structure schematic diagram of A of the application embodiment.

[0021] Explanation of reference signs: 1, machine body; 2, detector; 3, detection probe; 4, connecting block; 5, mounting groove; 6, spare probe; 7, limiting frame; 8, spring; 9, pull block; 10, auxiliary sheet; 11, mounting frame; 12, fixing frame; 13, control block; 14, suction plate; 15, clamping groove. DETAILED DESCRIPTION

[0022] The following will be combined with the Figure 1 -4 to make further detailed description of the present application.

[0023] The application embodiment discloses a maintenance-free micro-dissolved oxygen meter with convenient replacement of the measuring head, referring to Figure 1 - Figure 2The device includes a micro-dissolved oxygen meter body 1. During use, a detector 2 is installed at one end of the body 1 via a connecting wire, and a detection probe 3 is installed at one end of the detector 2. The detection probe 3 is placed in the water source. The detection probe 3 works based on the Clark electrode principle, using the current generated by the reaction of oxygen with silver and chloride ions in an acidic solution under a certain voltage to measure the dissolved oxygen content. The detection probe 3 measures the micro-dissolved oxygen concentration in the water. A connecting block 4 is installed on the surface of the body 1. The inner wall of the connecting block 4 has an installation groove 5. Several spare probes 6 are snapped into the inner wall of the installation groove 5. A limit frame 7 is rotatably connected to the surface of the connecting block 4 to facilitate the placement of the spare probes 6. This makes it convenient to replace the detection probe 3 during outdoor testing, and the limit frame 7 fixes the spare probes 6 in the installation groove 5.

[0024] Reference Figure 2 A spring 8 is installed at one end of the limiting frame 7, and one end of the spring 8 is connected to the inner wall of the connecting block 4 so that the limiting frame 7 can be pushed by the spring 8 to keep the limiting frame 7 locked to the surface of the spare probe 6 and the detection probe 3, effectively improving the fixing effect of the spare probe 6 and the monitoring probe. A pull block 9 is installed on the surface of the limiting clamp so that the limiting frame 7 can be rotated by the pull block 9, making it easy to remove the spare probe 6 from the mounting slot 5. A rubber auxiliary piece 10 is installed at one end of the limiting frame 7 so that the friction between the limiting frame 7 and the spare probe 6 and the detection probe 3 can be increased by the auxiliary piece 10, and the friction between the limiting frame 7 and the spare probe 6 and the detection probe 3 can be avoided, and the surface of the spare probe 6 and the detection probe 3 can be prevented from being worn.

[0025] Reference Figure 3 - Figure 4 The mounting bracket 11 is installed at the bottom of the connecting block 4. The surface of the mounting bracket 11 is rotatably connected to the fixing bracket 12. The inner wall of the fixing bracket 12 is engaged with the surface of the detector 2, so that the detector 2 can be installed on the surface of the body 1 with the help of the fixing bracket 12. This makes it convenient to fix the detector 2 when carrying it out. One end of each fixing bracket 12 is equipped with a magnetic suction plate 14, and the surface of the fixing bracket 12 is equipped with a control block 13, so that the two fixing brackets can be connected with the suction plate 14. The fixing bracket 12 can be easily disassembled by pulling the control block 13. The surface of the body 1 is provided with a slot 15. The inner wall of the slot 15 is engaged with the surface of the mounting bracket 11, so that the fixing bracket 12 and the connecting block 4 can be installed at one end of the body 1 with the mounting bracket 11 engaged with the slot 15. The mounting bracket 11 and the slot 15 can be separated, so that the device can be disassembled for replacement or cleaning.

[0026] The implementation principle of a maintenance-free micro-dissolved oxygen meter with easy-to-replace measuring head according to an embodiment of this application is as follows: A connecting block 4 is installed on the surface of the body 1. An installation groove 5 is provided on the inner wall of the connecting block 4. Several spare probes 6 are snapped into the inner wall of the installation groove 5. A limiting frame 7 is rotatably connected to the surface of the connecting block 4 to facilitate the placement of the spare probes 6. This allows for easy replacement of the measuring probes 3 during outdoor testing. The limiting frame 7 also fixes the spare probes 6 in the installation groove 5. A spring 8 is installed at one end of the limiting frame 7, and one end of the spring 8 is connected to the inner wall of the connecting block 4. The limit frame 7 is designed to be pushed by the spring 8 to keep it locked to the surfaces of the spare probe 6 and the detection probe 3, thus improving the fixation of the spare probe 6 and the detection probe. A pull block 9 is installed on the surface of the limit clamp to control the rotation of the limit frame 7, making it easy to remove the spare probe 6 from the mounting slot 5. A rubber auxiliary piece 10 is installed at one end of the limit frame 7 to increase the friction between the limit frame 7 and the spare probe 6 and the detection probe 3, and to prevent wear on the surfaces of the spare probe 6 and the detection probe 3.

[0027] The mounting bracket 11 can also be installed at the bottom of the connecting block 4. The surface of the mounting bracket 11 is rotatably connected to the fixing bracket 12. The inner wall of the fixing bracket 12 is engaged with the surface of the detector 2, so that the detector 2 can be installed on the surface of the body 1 with the help of the fixing bracket 12. This makes it convenient to fix the detector 2 when carrying it out. One end of each fixing bracket 12 is equipped with a magnetic suction plate 14, and the surface of the fixing bracket 12 is equipped with a control block 13, so that the two fixing brackets can be connected with the suction plate 14. The fixing bracket 12 can be easily disassembled by pulling the control block 13. The surface of the body 1 is provided with a slot 15. The inner wall of the slot 15 is engaged with the surface of the mounting bracket 11, so that the fixing bracket 12 and the connecting block 4 can be installed at one end of the body 1 with the mounting bracket 11 engaged with the slot 15. The mounting bracket 11 and the slot 15 can be separated, making it convenient to disassemble the device for replacement or cleaning.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A maintenance-free micro-dissolved oxygen meter with easy-to-replace measuring head, comprising a body (1) and a connecting block (4), characterized in that: One end of the body (1) is electrically connected to a detector (2) via a wire. A detection probe (3) is threaded onto the top of the detector (2). The center of the detection probe (3) is on the same straight line as the center of the detector (2). An installation groove (5) is provided on the inner wall of the connecting block (4). Several spare probes (6) are snapped into the inner wall of the installation groove (5). A limit frame (7) is rotatably installed on the surface of the connecting block (4).

2. The maintenance-free micro-dissolved oxygen meter with easily replaceable measuring head according to claim 1, characterized in that: One end of the connecting block (4) is fixedly connected to the surface of the body (1), the surface of the detection probe (3) is engaged with the inner wall of the mounting groove (5), and one end of the limiting frame (7) is engaged with the surface of the monitoring probe and the spare probe (6).

3. A maintenance-free micro-dissolved oxygen meter with an easily replaceable measuring head as described in claim 1, characterized in that: A spring (8) is fixedly installed at one end of the limiting frame (7), and the end of the spring (8) away from the limiting frame (7) is fixedly connected to the inner wall of the connecting block (4).

4. A maintenance-free micro-dissolved oxygen meter with an easily replaceable measuring head as described in claim 1, characterized in that: The surface of the limiting frame (7) is fixedly installed with a pull block (9), and the cross section of the pull block (9) is "L" shaped.

5. A maintenance-free micro-dissolved oxygen meter with an easily replaceable measuring head as described in claim 1, characterized in that: An auxiliary piece (10) is fixedly connected to one end of the limiting frame (7). The auxiliary piece (10) is a rubber sheet, and the size and specifications of the surface of the auxiliary piece (10) are compatible with the size and specifications of the surface of the limiting frame (7).

6. A maintenance-free micro-dissolved oxygen meter with an easily replaceable measuring head as described in claim 1, characterized in that: The bottom end of the connecting block (4) is fixedly installed with a mounting bracket (11), and a fixing bracket (12) is rotatably connected to the surface of the mounting bracket (11). The inner wall of the fixing bracket (12) is snapped into the surface of the detector (2), and the size of the inner wall of the fixing bracket (12) is compatible with the size of the surface of the detector (2).

7. A maintenance-free micro-dissolved oxygen meter with an easily replaceable measuring head as described in claim 6, characterized in that: Two suction plates (14) are fixedly installed at one end of each of the two fixed frames (12) that are close to each other. The two suction plates (14) are symmetrically distributed about the fixed frame (12) and the suction plates (14) are magnetic plates. A control block (13) is fixedly connected to the surface of the fixed frame (12).

8. A maintenance-free micro-dissolved oxygen meter with an easily replaceable measuring head according to claim 1, characterized in that: The surface of the body (1) has two slots (15) that are adapted to the mounting bracket (11). The inner wall of the slot (15) is engaged with the surface of the mounting bracket (11). The two slots (15) are symmetrically distributed about the body (1).

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