CN218321404U - A metering device for automatic replacement gas of fermentation cylinder - Google Patents
A metering device for automatic replacement gas of fermentation cylinder Download PDFInfo
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- CN218321404U CN218321404U CN202221536924.XU CN202221536924U CN218321404U CN 218321404 U CN218321404 U CN 218321404U CN 202221536924 U CN202221536924 U CN 202221536924U CN 218321404 U CN218321404 U CN 218321404U
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- measuring cylinder
- connecting pipeline
- metering device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The utility model belongs to the technical field of metering device, especially, relate to a metering device that is used for automatic replacement gas of fermentation cylinder. The utility model is suitable for an experiment that anaerobic fermentation's laboratory was carried out, the operation is automatic, labour saving and time saving. Comprises two standard measuring cylinders which are sleeved: the measuring device comprises an outer measuring cylinder and an inner measuring cylinder arranged in the outer measuring cylinder; the outer measuring cylinder and the inner measuring cylinder are fixedly connected into an integrated structure; and the top of the inner measuring cylinder is sealed; the top of the integrated structure is provided with a first connecting pipeline and a second connecting pipeline, one end of the first connecting pipeline is communicated with the inner measuring cylinder, the other end of the first connecting pipeline is connected with the fermentation tank, and the first connecting pipeline is provided with a first pinch valve; one end of the connecting pipeline II is communicated with the inner measuring cylinder, the other end of the connecting pipeline II is opened or is communicated with a gas recovery vessel, and a pinch valve II is arranged on the connecting pipeline II; the lower part of the inner measuring cylinder is provided with a through communication hole, so that the outer measuring cylinder and the inner measuring cylinder form a communicating vessel; and a liquid level sensor is arranged above the outer wall of the outer measuring cylinder and the communication hole.
Description
Technical Field
The utility model belongs to the technical field of metering device, especially, relate to a metering device that is used for automatic replacement gas of fermentation cylinder.
Background
Anaerobic fermentation experiments often require the measurement of biogas produced. In experiments, the production of biogas is generally low, typically below 5ml/min. Commercially available flow meters are too bulky to be used in this particular laboratory and, because conventional flow meters are sensitive to moisture and corrosive components of the biogas, it is common practice to provide a simple liquid displacement system or volumetric bag collection system.
However, these measures and means require manual refilling and, if many fermenters are operated, regular supervision, which is not only labor intensive but also time consuming.
Disclosure of Invention
The utility model provides a metering device for automatic gas replacement of a fermentation tank, aiming at the defects existing in the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme, two standard graduated cylinders are established including the cover: the measuring device comprises an outer measuring cylinder and an inner measuring cylinder arranged in the outer measuring cylinder; wherein, the outer measuring cylinder and the inner measuring cylinder are fixedly connected into an integrated structure; and the top of the inner measuring cylinder is sealed.
The top of the integrated structure is provided with a first connecting pipeline and a second connecting pipeline, one end of the first connecting pipeline is communicated with the inner measuring cylinder, the other end of the first connecting pipeline is connected with the fermentation tank, and the first connecting pipeline is provided with a first pinch valve; one end of the second connecting pipeline is communicated with the inner measuring cylinder, the other end of the second connecting pipeline is opened or communicated with a gas recovery vessel, and a pinch valve II is arranged on the second connecting pipeline.
The lower part of the inner measuring cylinder is provided with a through communication hole, so that the outer measuring cylinder and the inner measuring cylinder form a communicating vessel.
And a liquid level sensor is arranged above the outer wall of the outer measuring cylinder and the communication hole.
Further, the liquid level sensor adopts a liquid level optical sensor.
Further, a liquid is disposed within the integrated structure.
Still further, the liquid is a saline solution.
Furthermore, the outer measuring cylinder and the inner measuring cylinder share the same cylinder bottom, the top of the outer measuring cylinder is flush with the top of the inner measuring cylinder, the top of the outer measuring cylinder and the top of the inner measuring cylinder are fixedly connected into a whole through a support, and a sealing cover is arranged at the top of the inner measuring cylinder; the first connecting pipeline and the second connecting pipeline are both arranged on the sealing cover.
Furthermore, an annular compartment is formed between the outer measuring cylinder and the inner measuring cylinder.
Furthermore, the sealing cover is provided with two threaded holes, and the first connecting pipeline and the second connecting pipeline are in threaded connection with the sealing cover through the respective threaded holes.
Compared with the prior art the utility model discloses beneficial effect.
The utility model discloses easily operation can be applied to in most laboratories, can long-time automatic operation. The method is particularly suitable for experiments carried out in anaerobic fermentation laboratories, and in the experiments, the operation is automatic, and time and labor are saved.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.
FIG. 1 is a schematic diagram of an embodiment of a metering device for automatic displaced gas for a fermenter.
FIG. 2 is a front view of a metering device for automatic replacement gas for a fermenter.
FIG. 3 is a side view of a metering device for automatic displaced gas for a fermenter.
FIG. 4 is a schematic diagram of the metering device for the automatic replacement gas for the fermenter in connection with the control module.
FIG. 5 is a circuit schematic of an embodiment of a control module.
In the figure, 1 is an inner measuring cylinder, 2 is an outer measuring cylinder, 3 is a liquid level sensor, 4 is a pinch valve I, 5 is a pinch valve II, 6 is a bracket, 7 is an annular compartment, 8 is liquid, 9 is a communication hole, 10 is a counter, 11 is a control module, and 12 is a reset button.
Detailed Description
As shown in fig. 1-5, the specific embodiment: comprises two standard measuring cylinders which are sleeved: the measuring device comprises an outer measuring cylinder and an inner measuring cylinder arranged in the outer measuring cylinder; wherein, the outer measuring cylinder and the inner measuring cylinder are fixedly connected into an integrated structure; and the top of the inner measuring cylinder is sealed. The top of the annular compartment between the inner and outer graduated cylinders is not sealed. For storing liquid and displaying liquid.
The top of the integrated structure is provided with a first connecting pipeline and a second connecting pipeline, one end of the first connecting pipeline is communicated with the inner measuring cylinder, the other end of the first connecting pipeline is connected with the fermentation tank, and the first connecting pipeline is provided with a first pinch valve; one end of the second connecting pipeline is communicated with the inner measuring cylinder, the other end of the second connecting pipeline is opened or communicated with a gas recovery vessel, and a pinch valve II is arranged on the second connecting pipeline. The lower part of the inner measuring cylinder is provided with a through communication hole, so that the outer measuring cylinder and the inner measuring cylinder form a communicating vessel; and a liquid level sensor B is arranged above the outer wall of the outer measuring cylinder and the communication hole.
Preferably, the outer measuring cylinder and the inner measuring cylinder share the same cylinder bottom, the top of the outer measuring cylinder is flush with the top of the inner measuring cylinder, the top of the outer measuring cylinder and the top of the inner measuring cylinder are fixedly connected into a whole through a support, and a sealing cover is arranged at the top of the inner measuring cylinder; the first connecting pipeline and the second connecting pipeline are both arranged on the sealing cover. An annular compartment is formed between the outer measuring cylinder and the inner measuring cylinder. The sealing cover is provided with two threaded holes, and the first connecting pipeline and the second connecting pipeline are in threaded connection with the sealing cover through the respective threaded holes.
Preferably, the pinch valve I, the pinch valve II and the liquid level sensor are all connected with a control module, and the control module is further connected with a counter and a reset button. The control module is connected to an external VDC power supply. This is a conventional technical means and is not described herein in detail.
The inner measuring cylinder is used as an inner gas chamber G, an annular compartment is formed between the outer measuring cylinder and the inner measuring cylinder and is used as an outer air chamber A, and the pinch valve I and the pinch valve II are formed by 2+2 and a pinch valve C; one of the pinch valve I and the pinch valve II is normally open and normally closed. The counter has a reset function.
The operation process comprises the following steps:
in normal (inactive) conditions, the pinch valve C is open from the gas chamber G to the fermentor and the valve to atmospheric vent is closed.
The gas flows to the gas chamber G, displacing liquid to the air chamber a, and forming a liquid column between the two chambers. When 100ml of gas is collected, the liquid level in the chamber reaches a maximum value at which time the level sensor B initiates a regeneration cycle controlled by the control module E. The pinch valve was activated for about 15 seconds, allowing gas to vent and equilibrate the liquid column when the gas supply was turned off. At the same time, a counter D is activated to record the cycle and the system returns to normal, ready to receive more gas.
In one cycle, the amount of gas collected (0 to 100 ml) can be read on the scale of the air chamber a. The regeneration cycle is started by resetting the counter, and resetting is performed.
A main body:
the body was made from two different sizes of standard TPX measuring cylinder, 250ml (diameter 47 mm) and 1000ml (diameter 71 mm), each cut to a height of 180mm.
The small inner measuring cylinder is placed inside the large outer measuring cylinder, thus forming two compartments: a gas compartment (inner cylinder) and an air compartment (annular space between the two cylinders). And two threaded holes M5 are processed at the top of the inner cylinder and used for a 2mm pipe joint.
The pinch valve, the reset button and the inlet of the air pipe adapter are arranged on a small foot made of organic glass at the top of the inner measuring cylinder, and the two measuring cylinders are connected together by two M4 threaded metal rods.
A pipe clamping valve:
the pinch valve selected is a low power solenoid valve suitable for a 2mm inner diameter silicone tube, which can be activated directly by an electronic circuit.
A liquid level sensor:
the liquid level sensor is an LL101000 optical liquid level sensor under the Honeywell flag. The sensor is used to detect the fluid.
A counter: an electromechanical 4-bit 12VDC counter is selected with a reset button.
The implementation method of the control module is the prior art, and is not described herein; an exemplary embodiment is shown in fig. 5. In fig. 5, the control module is made of standard components, and in particular consists of a monostable flip-flop with an adjustable pulse period of about 15s, a transistor output stage driving the valve and the counter, mainly for activating the solenoid valve, resetting the counter and restarting. Wherein, R1:10k omega; r2:1k omega; r5:1k omega; r3:27k omega; r7:1M omega; r8:4.7M Ω var; r4:2.7k omega; r6:2.7k omega; r9220 omega; r10 470 Ω; r11:470 Ω. D1, D2, D3N 5392; LED1, green indicator light; LED2, red indicator light; c1:2.0pF/20V; c2:100nF; c3:0.47pF/20v; t1: BC547B; t2: BC337; the model of the integrated chip IC is LM311N synthesizer.
And (3) calibration process:
after assembly, the gas meter was calibrated by filling it with water and injecting air into the gas cell with a plastic syringe. The amount of water was adjusted until the electronic circuit was activated by the level sensor when the injected air was exactly 100 ml. The balanced level is marked as zero and the scale on the air chamber is calibrated by repeatedly injecting air.
The accuracy is as follows:
the accuracy of the flow meter depends on considerations during calibration. The repeat capacity was found to be about + -1 mL (i.e. + -. 1%) by multiple tests. Accuracy during long run depends on regular inspection and refilling of liquid content, since the liquid in the flow meter will gradually evaporate. Wherein the equalized liquid level can be checked against the zero marked position of the scale. By using a salt solution as the liquid, the evaporation rate can be minimized.
The overall working process is briefly described as follows: for example, the first pinch valve is opened, gas in the fermentation tank enters the inner measuring cylinder, and liquid is squeezed into the outer measuring cylinder; along with the gas entering, the liquid rises in the annular compartment until the liquid reaches the height of the liquid sensor, the liquid sensor transmits a reaching signal to the control module, the control module informs the counter to count 1 and reset, the control module controls the first pinch valve to close and the second pinch valve to open, and the gas in the measuring cylinder is released to the atmosphere or a gas recovery container; meanwhile, the second round of gas collection is started, and the cycle is repeated. And the cylinder walls of the outer measuring cylinder and the inner measuring cylinder are provided with scales, so that the gas inlet amount can be determined by reading the front liquid level difference and the rear liquid level difference when the liquid does not reach the position of the liquid level sensor. Assuming that each time the level sensor is triggered and reset, the gas ingress is 100ml, the counter reading is n, and the last level reading is Xml, then the total gas amount is: (100n + X) ml.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (7)
1. A metering device for automatic gas replacement of a fermentation tank comprises two standard measuring cylinders which are sleeved: the measuring device comprises an outer measuring cylinder and an inner measuring cylinder arranged in the outer measuring cylinder; the method is characterized in that: wherein, the outer measuring cylinder and the inner measuring cylinder are fixedly connected into an integrated structure; and the top of the inner measuring cylinder is sealed;
the top of the integrated structure is provided with a first connecting pipeline and a second connecting pipeline, one end of the first connecting pipeline is communicated with the inner measuring cylinder, the other end of the first connecting pipeline is connected with the fermentation tank, and the first connecting pipeline is provided with a first pinch valve; one end of a connecting pipeline II is communicated with the inner measuring cylinder, the other end of the connecting pipeline II is opened or communicated with a gas recovery vessel, and a pinch valve II is arranged on the connecting pipeline II;
the lower part of the inner measuring cylinder is provided with a through communication hole, so that the outer measuring cylinder and the inner measuring cylinder form a communicating vessel;
and a liquid level sensor is arranged above the outer wall of the outer measuring cylinder and the communication hole.
2. The metering device for the automatic replacement gas of the fermentation tank as claimed in claim 1, wherein: the liquid level sensor adopts a liquid level optical sensor.
3. The metering device for the automatic replacement gas of the fermentation tank as claimed in claim 1, wherein: the integrated structure has a liquid disposed therein.
4. The metering device for the automatic replacement gas of the fermentation tank as claimed in claim 3, wherein: the liquid is a salt solution.
5. The metering device for the automatic replacement gas of the fermentation tank as claimed in claim 1, wherein: the outer measuring cylinder and the inner measuring cylinder share the same cylinder bottom, the top of the outer measuring cylinder is flush with the top of the inner measuring cylinder, the top of the outer measuring cylinder and the top of the inner measuring cylinder are fixedly connected into a whole through a support, and a sealing cover is arranged at the top of the inner measuring cylinder; the first connecting pipeline and the second connecting pipeline are both arranged on the sealing cover.
6. The metering device for the automatic replacement gas of the fermentation tank as claimed in claim 5, wherein: an annular compartment is formed between the outer measuring cylinder and the inner measuring cylinder.
7. The metering device for the automatic replacement gas of the fermentation tank as claimed in claim 5, wherein: the sealing cover is provided with two threaded holes, and the first connecting pipeline and the second connecting pipeline are in threaded connection with the sealing cover through the respective threaded holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221536924.XU CN218321404U (en) | 2022-06-20 | 2022-06-20 | A metering device for automatic replacement gas of fermentation cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221536924.XU CN218321404U (en) | 2022-06-20 | 2022-06-20 | A metering device for automatic replacement gas of fermentation cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218321404U true CN218321404U (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221536924.XU Active CN218321404U (en) | 2022-06-20 | 2022-06-20 | A metering device for automatic replacement gas of fermentation cylinder |
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| Country | Link |
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| CN (1) | CN218321404U (en) |
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2022
- 2022-06-20 CN CN202221536924.XU patent/CN218321404U/en active Active
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