Rural areas often have some difficulties in the use of clean energy because of geographical and economic conditions. Therefore, using renewable resources to develop rural energy is one of the effective ways to solve rural energy problems. Among them, biogas, as a clean and efficient biomass energy, has been highly valued by the government and the market, and has been widely promoted and applied.

When it comes to rural biogas, people first think of its huge economic benefits: it can not only provide farmers with energy needed for daily life such as lighting and cooking, but also turn waste into treasure, so that crop straws and livestock manure can be rationally utilized; At the same time, fermented biogas residue and biogas slurry can also be used as high-quality organic fertilizers to improve soil structure and promote agricultural production and income. But at the same time, we can't ignore the importance of safety management measures, especially the regular maintenance of biogas digesters. In many safety links, an insignificant small part-"access door lock" plays an important role.

1, the concept and function of access lock

As the name implies, "manhole lock" is a safety device installed at the manhole at the top of biogas digester. Usually, in order to prevent foreign objects or people from accidentally falling in, and to facilitate the inspection and maintenance of the biogas digester in the future, it is required to set up a special inspection port. The existence of the manhole lock is to ensure the tightness and safety of the manhole when it is closed, and to avoid the occurrence of safety accidents caused by human misoperation.

2. Design principle and type of access door lock

At present, the common manhole locks on the market are roughly divided into two forms: one is mechanical locks, and the other is electromagnetic induction locks.

The former mainly relies on the key to switch functions; The latter completes the unlocking process by controlling the attraction/release of the electromagnet through the built-in circuit board. From the point of view of ease of use, it is obvious that the latter is better, because it supports remote control and opening, which greatly facilitates the operation process of staff. However, no matter which scheme is adopted, they must meet the following basic requirements:

(1) Have sufficient bearing capacity to resist external pressure;

(2) Ensure good corrosion resistance to meet the long-term use requirements in harsh environment;

(3) Design a reasonable handle or button for easy operation by users.

3. Selection basis of access door lock

Faced with a wide range of product models, how should users make the right choice? This requires comprehensive consideration of the following factors according to its actual situation:

① specifications and dimensions of biogas digesters: the specific parameters and indicators of the manhole lock for biogas facilities with different capacity grades are naturally different. Therefore, it is best to measure the relevant data before purchasing, and then select the appropriate product series according to the corresponding standards.

② Budget cost: Although price is not the decisive factor, under the same conditions, the option with higher cost performance should be given priority.

③ Quality of after-sales service: A good brand should have a perfect after-sales guarantee system besides excellent product quality, so as to make users feel at ease and comfortable.

4. Matters needing attention in daily maintenance

Finally, remind farmers and friends not to forget to do a good job in equipment maintenance while enjoying convenient services! Specifically, it mainly includes the following contents:

A) Regularly check the screw fastening to prevent looseness;

B) Keep the surface clean and dry to avoid rust and corrosion;

C) In case of abnormal noise or jamming, contact professional and technical personnel for on-site treatment in time, and do not disassemble it without authorization to avoid further losses.

In a word, rural biogas digesters, as a good project benefiting the country and the people, can not operate stably without the support of every protection link. Only by putting every detail in place can we truly play its due value. I hope this article can help you to better understand the relevant knowledge of this important component, and pay enough attention to it.

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