Leakage induction circuit and digestion heater

Abstract

The utility model relates to the technical field of digestion heaters, in particular to a liquid leakage induction circuit and a digestion heater, which comprises a power supply unit, an induction electrode, a processing unit, a signal amplifier and a light emitting diode, the induction electrode is electrically connected with the power supply unit and used for sending a signal to the processing unit when making contact with leaked liquid. The processing unit is provided with an input end and an output end, and the input end is electrically connected with the sensing electrode; the signal amplifier is electrically connected with the output end of the processing unit; the positive electrode is electrically connected with the signal amplifier, and the negative electrode is electrically connected with the power supply unit. The utility model effectively solves the problem that in the prior art, when liquid leakage occurs during sealed digestion of the prefabricated reagent tube, the liquid leakage is not easy to find in time.

Description

Technical Field

[0001] The utility model relates to the technical field of digestion heaters, in particular to a liquid leakage sensing circuit and a digestion heater. Background Art

[0002] At present, COD (chemical oxygen demand) of sewage is mostly measured by sealed catalytic digestion method. That is, a certain amount of potassium dichromate is added as an oxidant in a strong acid solution, and at the same time, it is heated and digested at a constant temperature of 165°C for 30 minutes under the action of a special composite catalyst. Potassium dichromate is reduced to trivalent chromium by organic matter in the water. The residual hexavalent chromium is measured at a wavelength of 420nm in the low range, and the trivalent chromium ion generation is measured at a wavelength of 620nm in the high range. The CODcr value (dichromate index) of the sample is converted according to its absorbance.

[0003] At present, the laboratory promotes the use of prefabricated reagent tube sealed digestion method for experiments. The CODcr prefabricated reagent tube is digested in the digester, and a spectrophotometer is also provided to colorimetrically determine the CODcr content of the water sample. In actual applications, the CODcr prefabricated reagent bottle has the following defects during the digestion process:

[0004] Because the sealed digestion method is adopted, the prefabricated reagent tube will be sealed by a sealing plug; however, the potassium dichromate and concentrated sulfuric acid in the prefabricated reagent tube will undergo a violent redox reaction under the catalytic action of silver sulfate, and leakage often occurs at the tube plug or the bottom of the tube. This situation is not easy to be detected in time by the operator. If not handled in time, it will not only affect the accuracy of the analysis results, but also corrode the heating module of the digestion heater. Utility Model Content

[0005] In response to the above problems, the present application provides a leakage sensing circuit and a digestion heater, which solves the problem in the prior art that leakage of prefabricated reagent tubes during sealed digestion is difficult to be discovered in time.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] In a first aspect, the utility model provides a liquid leakage sensing circuit, comprising:

[0008] A power supply unit, used for providing electric energy;

[0009] a sensing electrode, electrically connected to the power supply unit, and configured to send a signal to the processing unit when in contact with the leaking liquid;

[0010] a processing unit having an input terminal and an output terminal, wherein the input terminal is electrically connected to the sensing electrode;

[0011] a signal amplifier, electrically connected to the output end of the processing unit;

[0012] The light emitting diode has an anode and a cathode, wherein the anode is electrically connected to the signal amplifier, and the cathode is electrically connected to the power supply unit.

[0013] According to the liquid leakage sensing circuit provided by the utility model, the sensing electrode is a platinum wire sensing electrode.

[0014] According to the liquid leakage sensing circuit provided by the utility model, the processing unit is a processing chip.

[0015] The liquid leakage sensing circuit provided by the utility model further includes: a buzzer, wherein the positive pole of the buzzer is electrically connected to the signal amplifier, and the negative pole of the buzzer is electrically connected to the power supply unit.

[0016] According to the liquid leakage sensing circuit provided by the utility model, there are multiple sensing electrodes, and they are electrically connected to the processing unit respectively;

[0017] Correspondingly, there are also a plurality of light emitting diodes, and the number of the sensing electrodes is the same as the number of the light emitting diodes, and the light emitting diodes are electrically connected to the processing units respectively.

[0018] In a second aspect, the utility model further provides a digestion heater, comprising the liquid leakage sensing circuit described in the first aspect, and also comprising a digestion heater body, wherein the digestion heater body has a plurality of heating cavities, and the sensing electrodes are arranged in the heating cavities.

[0019] According to the digestion heater provided by the utility model, the bottom of the heating chamber is provided with a high temperature resistant material, and the induction electrode is arranged on the high temperature resistant material.

[0020] According to the digestion heater provided by the utility model, the high temperature resistant material is glass fiber.

[0021] The utility model provides a liquid leakage sensing circuit and a digestion heater. Through the setting of sensing electrodes, the liquid leakage can be monitored in real time. When liquid flows out and contacts the leaked liquid, a signal is sent to a processing unit. The processing unit sends a control instruction to a signal amplifier. The signal amplifier amplifies the received control instruction and sends it to a light emitting diode. At this time, the light emitting diode emits light to remind the operator that there is a liquid leakage. In this way, the operator can deal with the liquid leakage in time to avoid the occurrence of safety accidents.

[0022] By applying the leakage sensing circuit to the digestion heater, the leakage in each heating chamber can be monitored in real time and sound and light alarms can be issued, which can promptly remind the operator to deal with the leakage in time and avoid corrosion of the heating module by the leakage.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0025] Figure 1 A schematic diagram of the structure of a liquid leakage sensing circuit provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the structure of a digestion heater with a liquid leakage sensing circuit provided in an embodiment of the present application.

[0027] Reference numerals:

[0028] 1. Buzzer; 2. DC5V power supply; 3. Intermediate relay; 4. DC24V power supply; 5. Digestion heater body; 501. Heating chamber; 6. Light panel; 601. Light emitting diode; 7. Induction electrode matrix panel; 701. Platinum wire induction electrode; 8. Processing unit. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means two or more.

[0031] In order to solve the above technical problems, the utility model proposes the following technical solutions and corresponding embodiments.

[0032] Combine the following Figure 1 to Figure 2 The embodiment shown describes the technical solution of the utility model: wherein, Figure 1 As shown:

[0033] The embodiment of the utility model provides a liquid leakage sensing circuit, comprising: a power supply unit, a sensing electrode, a processing unit 8, a signal amplifier and a light emitting diode 601, wherein the power supply unit is used to provide electrical energy; the sensing electrode is electrically connected to the power supply unit, and is used to send a signal to the processing unit 8 when in contact with the leakage; the processing unit 8 has an input end and an output end, wherein the input end is electrically connected to the sensing electrode; the signal amplifier is electrically connected to the output end of the processing unit 8; the light emitting diode 601 has a positive electrode and a negative electrode, the positive electrode is electrically connected to the signal amplifier, and the negative electrode is electrically connected to the power supply unit.

[0034] In some embodiments, the power supply unit may preferably be a DC24V power supply 4 (direct current voltage) to supply power to the entire circuit;

[0035] The sensing electrode can be a capacitive sensing electrode or a resistive sensing electrode, as long as it can send an electrical signal to the processing unit 8 after detecting the liquid; the processing unit 8 can be a single-chip microcomputer or a separate processing chip, as long as it can receive and process the transmitted liquid monitoring signal and transmit control instructions to the signal amplifier; the signal amplifier can be a signal amplification circuit (not shown in the figure), or a chip with a signal amplification function can be directly selected, such as the model ULN2003A chip used in this embodiment.

[0036] The embodiment of the utility model provides a liquid leakage sensing circuit and a digestion heater. Through the setting of the sensing electrode, the liquid leakage can be monitored in real time. When liquid flows out and contacts the leaked liquid, a signal is sent to the processing unit 8. The processing unit 8 sends a control instruction to the signal amplifier. The signal amplifier amplifies the received control instruction and sends it to the light-emitting diode 601. At this time, the light-emitting diode 601 lights up to remind the operator that there is a liquid leakage. In this way, the operator can deal with the liquid leakage in time to avoid the occurrence of safety accidents.

[0037] By applying the leakage sensing circuit to the digestion heater, the leakage in each heating chamber 501 can be monitored in real time and sound and light alarms can be issued, thus reminding the operator to deal with the leakage in time and avoiding corrosion of the heating module by the leakage.

[0038] According to the leakage sensing circuit provided by the embodiment of the utility model, Figure 1 As shown, the sensing electrode is a platinum wire sensing electrode 701 .

[0039] In this embodiment, the sensing electrode is preferably a platinum wire sensing electrode 701. The platinum wire has good conductivity and stability. Therefore, in liquid monitoring, when in contact with the liquid, the platinum wire electrodes at both ends are conducted by the liquid and the resistance value increases. The resistance change is sensed and processed by the processing unit 8, and finally a corresponding control instruction is made.

[0040] The platinum wire sensing electrode 701 is usually combined with a measuring circuit, such as a bridge circuit or a constant current source circuit, to accurately measure the change in resistance value. These circuits can convert the resistance change into a readable electrical signal, such as voltage or current.

[0041] According to the leakage sensing circuit provided by the embodiment of the utility model, Figure 1 As shown, the processing unit 8 is a processing chip.

[0042] In this embodiment, the processing chip is preferably a ULN2003A chip, which has data processing and signal amplification functions, thus saving an external signal amplification circuit and reducing manufacturing costs.

[0043] According to the leakage sensing circuit provided by the embodiment of the utility model, Figure 1 As shown, it also includes: a buzzer 1, the positive pole of the buzzer 1 is electrically connected to the signal amplifier, and the negative pole of the buzzer 1 is electrically connected to the power supply unit.

[0044] In this embodiment, the power supply unit also includes a DC5V power supply 2, and the buzzer 1 is separately connected to the DC5V power supply 2; in addition, the purpose of adding the buzzer 1 is to issue a sound alarm when the light-emitting diode 601 is emitting light, that is, to achieve the effect of simultaneous sound and light alarm, so that when the operator does not notice the light alarm, the sound alarm can be used to promptly remind the operator to handle the leakage.

[0045] According to the leakage sensing circuit provided by the embodiment of the utility model, Figure 1 As shown, there are multiple sensing electrodes, and each of them is electrically connected to the processing unit 8;

[0046] Correspondingly, there are also a plurality of light emitting diodes 601 , and the number of the sensing electrodes is the same as the number of the light emitting diodes 601 , and the light emitting diodes 601 are electrically connected to the processing units 8 respectively.

[0047] In this embodiment, the positive pole of the DC24V power supply 4 is connected to the intermediate relay 3, and the other end of the intermediate relay 3 is respectively connected to three vertical columns of platinum wire sensing electrodes 701. The sensing electrode matrix disk 7 has 3*5 platinum wire sensing electrodes 701; similarly, the light emitting diodes 601 on the light emitting lamp disk 6 also have 3*5, and they correspond one to one in the circuit control; Figure 1In the embodiment, the platinum wire sensing electrode 701 at A is in a closed state, and the corresponding light-emitting diode 601 at F lights up; in this way, the operator can quickly find which prefabricated reagent tube has a leak; of course, there are also three processing units 8, each of which is connected to a column (5) of sensing electrodes and a column (5) of light-emitting diodes 601; when the processing unit 8 uses the ULN2003A chip, their specific connection method is: the sensing electrodes at A, B, C, D and E are respectively connected to the input terminals 3, 4, 5, 6 and 7 of the ULN2003A chip input end; and the corresponding light-emitting diodes 601 at F, G, H, I and J are respectively connected to the output terminals 3, 4, 5, 6 and 7 of the ULN2003A chip output end, and the remaining unused terminals are used as spares; the remaining two groups are connected in this way.

[0048] The utility model embodiment also provides a digestion heater, such as Figure 2 As shown, it includes the leakage sensing circuit as described above, and also includes a digestion heater body 5 , the digestion heater body 5 has a plurality of heating chambers 501 , and the sensing electrodes are arranged in the heating chambers 501 .

[0049] In some embodiments, the digestion heater can use an existing digestion instrument, mainly by setting up sensing electrodes in its multiple heating chambers 501; in this way, when liquid flows into the heating chamber 501, it can be sensed in time and an audible and visual alarm will occur; of course, the sensing electrode can be set on the bottom end or side wall of the heating chamber 501.

[0050] According to the digestion heater provided by the embodiment of the utility model, the bottom of the heating chamber 501 is provided with a high temperature resistant material, and the sensing electrode is provided on the high temperature resistant material.

[0051] In some embodiments, a high temperature resistant material is disposed at the bottom of the heating chamber 501 to prevent leakage from slowly corroding the bottom and then entering the heating circuit module of the digestion heater; the high temperature resistant material can be of various types, such as ceramic material partitions, nickel-based alloy partitions, etc., all of which have high temperature resistance and corrosion resistance.

[0052] According to the digestion heater provided by the embodiment of the utility model, the high temperature resistant material is glass fiber.

[0053] Glass fiber has the following advantages:

[0054] High Strength: Glass fiber has a high tensile strength, higher than many metal materials, which makes it very useful in applications that require high strength. Corrosion Resistance: Glass fiber has good corrosion resistance to most chemicals and is not easily affected by corrosion and rust. Lightweight: Glass fiber is generally lighter than metal materials, which is very beneficial for applications that need to reduce weight. Good insulation properties: Glass fiber is a good insulator and can be used in electrical and electronic equipment to provide insulation protection. High temperature resistance: Some glass fibers are able to maintain their properties in high temperature environments, making them suitable for high temperature applications such as industrial furnaces and fireproof materials. Design Flexibility: Glass fiber can be made into products of various shapes and sizes, with high design flexibility. Cost-effectiveness: Compared with some high-performance materials, the relatively low cost of glass fiber makes it economically advantageous in some applications.

[0055] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.

Claims

1. A liquid leakage sensing circuit, characterized in that: include: A power supply unit, used for providing electrical energy; a sensing electrode, electrically connected to the power supply unit, and configured to send a signal to the processing unit when in contact with the leaking liquid; a processing unit having an input terminal and an output terminal, wherein the input terminal is electrically connected to the sensing electrode; a signal amplifier, electrically connected to the output end of the processing unit; The light emitting diode has an anode and a cathode, wherein the anode is electrically connected to the signal amplifier, and the cathode is electrically connected to the power supply unit.

2. The liquid leakage sensing circuit according to claim 1, characterized in that: The sensing electrode is a platinum wire sensing electrode.

3. The liquid leakage sensing circuit according to claim 1, characterized in that: The processing unit is a processing chip.

4. The liquid leakage sensing circuit according to claim 1, characterized in that: Also includes: A buzzer, wherein the positive electrode of the buzzer is electrically connected to the signal amplifier, and the negative electrode of the buzzer is electrically connected to the power supply unit.

5. The liquid leakage sensing circuit according to claim 1, characterized in that: There are a plurality of sensing electrodes, and each of the sensing electrodes is electrically connected to the processing unit; Correspondingly, there are also a plurality of light emitting diodes, and the number of the sensing electrodes is the same as the number of the light emitting diodes, and the light emitting diodes are electrically connected to the processing units respectively.

6. A digestion heater, characterized in that: It comprises the liquid leakage sensing circuit as described in any one of claims 1 to 5, and also comprises a digestion heater body, wherein the digestion heater body has a plurality of heating chambers, and the sensing electrodes are arranged in the heating chambers.

7. The digestion heater according to claim 6, characterized in that: The bottom of the heating chamber is provided with a high temperature resistant material, and the sensing electrode is provided on the high temperature resistant material.

8. The digestion heater according to claim 7, characterized in that: The high temperature resistant material is glass fiber.

Images