阅读说明：本技术 一种适用于水生模式生物的长期暴露实验系统 (Long-term exposure experimental system suitable for aquatic model organisms ) 是由 涂文清 黄晶 邓觅 吴永明 于 2019-10-19 设计创作，主要内容包括：本发明公开了一种适用于水生模式生物的长期暴露实验系统,包括多个暴露缸,暴露缸的内部连接隔架,且隔架连接有漏板,暴露缸的上方设有进水管,进水管的出水口与暴露缸的缸壁形成利于产生水旋涡的夹角,进水管上安装有水位控制阀,暴露缸的内部固定安装有水泵,本发明的水生模式生物的长期暴露实验系统结构设计巧妙,由于隔架设计为漏斗形状,并且通过暴露缸中的进水管的出水口与缸体形成45度的出水夹角,让暴露缸的液体形成一定的漩涡,易于粪便等杂质从隔架的中部漏板处排出,从而减少人工清洗缸体的强度,并且自动化的设计能够大大减少工作人员的劳动强度,并且可实现增压泵自动运行和关闭,运行可靠稳定。(The invention discloses a long-term exposure experimental system suitable for aquatic model organisms, which comprises a plurality of exposure cylinders, wherein the inside of each exposure cylinder is connected with a separation frame, the separation frames are connected with a leakage plate, a water inlet pipe is arranged above each exposure cylinder, an included angle which is favorable for generating water vortex is formed between the water outlet of the water inlet pipe and the cylinder wall of each exposure cylinder, a water level control valve is arranged on the water inlet pipe, and a water pump is fixedly arranged inside each exposure cylinder. Moreover, the automatic operation and the closing of the booster pump can be realized, and the operation is reliable and stable.)

1. A long-term exposure experimental system suitable for aquatic model organisms, comprising a support (1), characterized in that: a plurality of rows of exposed cylinders (2) are arranged on the bracket (1), a funnel-shaped partition frame (3) formed by splicing four trapezoidal plates is fixedly connected inside the exposed cylinders (2), a bushing plate (4) is fixedly connected at the middle position of the separation frame (3), an inclined plate (5) is fixedly connected below the separation frame (3) and positioned inside the exposure cylinder (2), a water inlet pipe (6) is arranged above the exposure cylinder (2), an included angle which is favorable for generating water vortex is formed between the water outlet of the water inlet pipe (6) and the cylinder wall of the exposure cylinder (2), a water level control valve (7) is arranged on the water inlet pipe (6), a water pump (8) is fixedly arranged in the exposure cylinder (2), the tail end of a water suction pipe of the water pump (8) is positioned between the inclined plate (5) and the partition frame (3), and the tail end of a water outlet pipe of the water pump (8) is inserted into the interior of the sewer pipe;

last and be located every row of top fixedly connected with that exposes jar (2) of support (1) and go up work or material rest (10), it is connected with bull stick (11) to go up to rotate on work or material rest (10), just bull stick (11) rotate through motor (12) drive, and every exposes jar (2) directly over and be located equal fixedly connected with backup pad (13) on work or material rest (10), the activity joint has magazine (14) on backup pad (13), the lower extreme of magazine (14) rotates and is connected with worm (15), just bull stick (11) rotate through gear structure drive worm (15).

2. The system of claim 1, wherein the system is adapted for long-term exposure of model aquatic organisms, and comprises: the right-hand member of support (1) is equipped with water storage bucket (16), the top fixed mounting of water storage bucket (16) has agitating unit (17), the water inlet of water storage bucket (16) passes through the pipe and is connected with the liquid outlet of proportional pump (18), the delivery port of water storage bucket (16) is connected with booster pump (19), just the delivery port and every inlet tube (6) the intercommunication of booster pump (19).

3. The system of claim 2, wherein the system is adapted for long-term exposure of model aquatic organisms, and comprises: the water level control valve (7) comprises a shell (701), the shell (701) is connected in series on a water inlet pipe (6), a steering engine (702) is fixedly installed inside the shell (701), a bushing (703) is fixedly connected to the output end of the steering engine (702), a through hole (704) is formed inside the bushing (703), the through hole (704) is movably communicated with the water inlet pipe (6) at the two ends of the shell (701), a buoy (705) is connected to the lower end of the shell (701) in a sliding mode, a conducting plate (706) is fixedly connected to the inner end of the buoy (705), the conducting plate (706) is movably connected with a first contact (707) and a second contact (708) which are arranged on the inner side wall of the shell (701) and used for controlling forward rotation and reverse rotation of the steering engine (702), a group of first contacts (707) and a group of second contacts (708) on each water level control valve (7) are connected with a PWM, and the PWM module is electrically connected with a signal wire of the steering engine (702).

4. A long-term exposure experimental system for aquatic model organisms according to claim 3, wherein: and a sealing ring (9) for sealing is clamped between the outer side wall of the bushing (703) and the inner side wall of the shell (701).

5. The system of claim 2, wherein the system is adapted for long-term exposure of model aquatic organisms, and comprises: and an included angle formed by the water outlet of the water inlet pipe (6) and the cylinder wall of the exposed cylinder (2) is 45 degrees.

6. A long-term exposure experimental system for aquatic model organisms according to claim 3, wherein: still fixedly connected with a set of third contact (21) on shell (701) inside wall, third contact (21), first contact (707) are connected with conducting strip (706) simultaneously and are separated, a set of third contact (21) on a plurality of water level control valves (7) are established ties in proper order through the wire and are established ties in the boost switch's of booster pump (19) switch circuit after and, booster switch is electromagnetic switch, just booster pump (19) do not move when electromagnetic switch circular telegram, and booster pump (19) move when electromagnetic switch cuts off the power supply.

7. The system of claim 6, wherein the system is adapted for long-term exposure of model aquatic organisms, and comprises: the outer side wall of the shell (701) is further provided with a two-position switch (22), and two switch control bits on the two-position switch (22) are respectively connected in series in the leads of the group of second contacts (708) and the group of third contacts (21).

8. The system of claim 7, wherein the system is adapted for long-term exposure of model aquatic organisms, and comprises: when the two-position switch (22) is pressed, one group of the third contacts (21) is short-circuited and the wire of one group of the second contacts (708) is broken.

Technical Field

The invention relates to the technical field of environmental toxicology of aquatic organisms, in particular to a long-term exposure experimental system suitable for aquatic model organisms.

Background

The environmental pollutants refer to exogenous chemical substances which interfere the endocrine mechanism of the human body and influence the normal regulation function of the human body. The environmental pollutants are various and comprise inorganic pollutants, PCDDs, PCBs, PCDFs, organochlorine pesticides, organophosphorus pesticides, PAHs and the like. The influence of environmental pollutants on human bodies and organisms and the action mechanism of the environmental pollutants are main contents of environmental toxicology research, wherein aquatic organisms (such as zebrafish and medaka) are widely used in scientific research as laboratory model organisms. The concentration of environmental pollutants in air, soil and water is usually very low (ng/L-ug/L), but as aquatic organisms have the functions of concentration, accumulation and amplification, the pollutants entering the environment, even if trace, can cause organisms, especially organisms at high nutrition level, to be seriously poisoned by contacting the pollutants for a long time, which poses a great threat to human health. Therefore, in the research of environmental toxicology of environmental pollutants, the research of biological effects caused by long-term low-concentration exposure of fishes is important. Furthermore, fish have a physiological system similar to mammals, and therefore the biological effects found in fish can be applied to other vertebrates and can even be used to predict the effect of environmental pollutants on humans.

The water body exposure is the most similar natural survival mode of fishes and becomes the main exposure mode of environmental pollutant laboratory exposure, the common aquatic organism exposure modes are divided into a still water exposure mode and a moving water exposure mode, the exposure liquid does not need to be replaced in static exposure, the experiment time is short (no more than one week), and long-term exposure experiments cannot be carried out; the moving water type exposure needs to regularly replace part of the exposure liquid, so that long-term exposure experiments can be carried out, but long-term exposure needs to feed fish food for 1-2 times every day to maintain normal growth of the fish, so that water quality in the exposure tank can be deteriorated in a short time (usually 12-24 hours) due to fish food residues, fish feces, particle impurities in water and the like, and the water quality is maintained by replacing a large amount of the exposure liquid and increasing the frequency of cleaning the fish tank in the traditional method, so that the labor intensity is greatly increased; in addition, the traditional method frequently changes a large amount of exposure liquid and cleans the fish tank, which can affect the growth and reproduction of fish, and the result of the exposure experiment is questioned to a great extent, so that a running water type long-term exposure mode, namely a long-term exposure experiment system suitable for aquatic model organisms is provided to solve the problems, and thus, the automatic long-term exposure experiment process with low cost is realized.

Disclosure of Invention

The present invention is directed to a long-term exposure experimental system for aquatic model organisms, which solves the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: a long-term exposure experiment system suitable for aquatic model organisms comprises a support, wherein a plurality of rows of exposure cylinders are arranged on the support, the interior of each exposure cylinder is fixedly connected with a funnel-shaped partition frame formed by splicing four trapezoidal plates, a leakage plate is fixedly connected to the middle position of each partition frame, an inclined plate is fixedly connected to the lower part of each partition frame and the interior of each exposure cylinder, a water inlet pipe is arranged above each exposure cylinder, an included angle favorable for generating water vortex is formed between the water outlet of each water inlet pipe and the cylinder wall of each exposure cylinder, a water level control valve is installed on each water inlet pipe, a water pump is fixedly installed in each exposure cylinder, the tail end of a water suction pipe of each water pump is located between each inclined plate and each partition frame, and the tail end of a water outlet pipe of each water;

the material loading frame is fixedly connected to the upper portion of each row of the exposed cylinders on the support, a rotating rod is connected to the material loading frame in a rotating mode and rotates under the driving of a motor, a supporting plate is fixedly connected to the upper portion of each exposed cylinder and located on the material loading frame, a material box is movably clamped on the supporting plate, a worm is connected to the lower end of the material box in a rotating mode, and the rotating rod drives the worm to rotate through a gear structure.

Preferably, the right-hand member of support is equipped with the water storage bucket, the top fixed mounting of water storage bucket has agitating unit, the water inlet of water storage bucket passes through the pipe and is connected with the liquid outlet of proportioning pump, the delivery port of water storage bucket is connected with the booster pump, just the delivery port and every inlet tube intercommunication of booster pump.

Preferably, the water level control valve comprises a shell, the shell is connected in series to a water inlet pipe, a steering engine is fixedly mounted inside the shell, a bushing is fixedly connected to an output end of the steering engine, a through hole is formed inside the bushing and is movably communicated with the water inlet pipes at two ends of the shell, a buoy is slidably connected to the lower end of the shell, a conducting strip is fixedly connected to the inner end of the buoy and is movably connected with a first contact and a second contact which are arranged on the inner side wall of the shell and used for controlling the forward rotation and the reverse rotation of the steering engine, a group of first contacts and a group of second contacts on each water level control valve are connected with a PWM module, and the PWM module is electrically connected with a signal line of the steering engine. .

Preferably, a sealing ring for sealing is clamped between the outer side wall of the bushing and the inner side wall of the housing.

Preferably, the included angle formed by the water outlet of the water inlet pipe and the cylinder wall of the exposed cylinder is 45 degrees.

Preferably, still fixedly connected with a set of third contact on the shell inside wall, third contact, first contact are connected with the conducting strip simultaneously and are separated, a set of third contact on a plurality of water level control valves passes through the wire and establishes ties in the switching circuit of the pressure boost switch of booster pump after establishing ties in proper order, pressure boost switch is electromagnetic switch, just the booster pump does not operate when electromagnetic switch circular telegram, and the booster pump operates when electromagnetic switch cuts off the power supply.

Preferably, the outer side wall of the housing is further provided with a two-position switch, and two switch control bits on the two-position switch are respectively connected in series in the leads of the second contact and the third contact.

Preferably, when the two-position switch is pressed, the group of third contacts are short-circuited and the wire of the group of second contacts is broken.

Compared with the prior art, the invention has the beneficial effects that: the long-term exposure experimental system for aquatic model organisms is ingenious in structural design, the water pump is powered on at regular time to pump water at regular time, the water level control valve conducts the water inlet pipe to start water supplement after the liquid level in the exposure cylinder is lowered, the rotating rod drives the worm to rotate by starting the motor at regular time, so that feed in the feed box is stirred into the exposure cylinder, full-automatic water changing and automatic feeding are realized, and water changing frequency, water changing amount and feeding frequency can be set manually; because the shelf design is the funnel shape to delivery port and the cylinder body through exposing the inlet tube in the jar form 45 degrees play water contained angles, let the liquid that exposes the jar form certain swirl, impurity such as easily excrement and urine is discharged from the middle part bushing of shelf, thereby reduce the intensity of labour of manual cleaning cylinder body, and can independently select the use quantity that exposes the jar during the experiment, set for through the on/off switch, convenient and fast does not influence other uses that expose the jar in the system and the automatic operation of force (forcing) pump.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the water inlet pipe, the water storage barrel and the booster pump of the present invention;

FIG. 3 is a schematic view of the structure of the water pump, the water suction pipe, the water outlet pipe and the sewer pipe of the present invention;

FIG. 4 is a schematic structural view of the loading frame, the support plate and the magazine according to the present invention;

FIG. 5 is an enlarged view taken at A of FIG. 4 in accordance with the present invention;

FIG. 6 is an exploded view of the magazine, worm and support plate of the present invention;

FIG. 7 is a schematic view of the structure of the exposure cylinder, the spacer and the water inlet pipe of the present invention;

FIG. 8 is a cross-sectional view I of the present invention showing the cylinder, spacer and water inlet pipe;

FIG. 9 is a cross-sectional view II of the present invention showing the cylinder, spacer and water inlet pipe;

FIG. 10 is a cross-sectional view I of the water inlet pipe and the water level control valve according to the present invention;

FIG. 11 is a sectional view II of the water inlet pipe and the water level control valve according to the present invention;

FIG. 12 is a schematic view of the structure of the water inlet pipe and the water level control valve according to the present invention;

FIG. 13 is a circuit diagram of the third contact, the conductive sheet and the booster pump according to the present invention;

FIG. 14 is a circuit diagram of the first and second contacts of the present invention with a steering engine;

FIG. 15 is a schematic diagram of a boost switch of the booster pump of the present invention;

fig. 16 is a schematic diagram of an on/off switch according to the present invention.

In the figure: 1. the device comprises a bracket, 2, an exposure cylinder, 3, a separation frame, 4, a leakage plate, 5, an inclined plate, 6, a water inlet pipe, 7, a water level control valve, 701, a shell, 702, a steering engine, 703, a lining, 704, a through hole, 705, a buoy, 706, a conducting strip, 707, a first contact, 708, a second contact, 8, a water pump, 9, a sealing ring, 10, a feeding frame, 11, a rotating rod, 12, a motor, 13, a supporting plate, 14, a material box, 15, a worm, 16, a water storage barrel, 17, a stirring device, 18, a proportional pump, 19, a booster pump, 20, a control box, 21, a third contact, 22 and a two-position switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-16, the present invention provides a technical solution: a long-term exposure experimental system suitable for aquatic model organisms comprises a support 1, wherein a plurality of rows of exposure cylinders 2 are arranged on the support 1, the material of the exposure cylinders 2 is acrylic material, a funnel-shaped separation frame 3 formed by splicing four trapezoidal plates is fixedly connected inside the exposure cylinders 2, a leakage plate 4 is fixedly connected to the middle position of the separation frame 3, the material of the leakage plate 4 is acrylic material, the leakage plate 4 plays a role in blocking fishes above the separation frame 3 and preventing the fishes from running off, a plurality of holes are formed inside the leakage plate 4 to enable impurities such as excrement and urine to pass through, an inclined plate 5 is fixedly connected inside the separation frame 3 and positioned above the exposure cylinders 2, a water inlet pipe 6 is arranged above the exposure cylinders 2, an included angle which is favorable for generating water vortex is formed between the water outlet of the water inlet pipe 6 and the cylinder wall of the exposure cylinders 2, and when the water outlet of the water inlet pipe 6 is injected into liquid, the liquid flowing at the water outlet of the water inlet pipe 6 forms an included angle with the cylinder wall of the exposed cylinder 2 as shown in fig. 7, so that the liquid inside the exposed cylinder 2 is easy to generate vortex, and then impurities such as feces and the like are convenient to discharge from the middle leakage plate 4 of the partition frame 3, so as to reduce the labor intensity of manually cleaning the cylinder body, the water level control valve 7 is installed on the water inlet pipe 6, the water pump 8 is fixedly installed inside the exposed cylinder 2, the water change amount inside the exposed cylinder 2 can be controlled (the water change amount can be controlled by opening and closing the time interval of the water pump 8) by additionally arranging the water pump 8 for pumping out the liquid inside the exposed cylinder 2, and then the factor of liquid change in the experiment is convenient to control, so that the experiment result is more accurate, the tail end of the water suction pipe of the water pump 8 is positioned between the inclined plate 5 and the partition frame 3, as shown in fig. 8, when the, the liquid above the separation frame 3 flows to the lower part of the separation frame 3 from the leakage plate 4, and then impurities such as excrement and urine are doped in the liquid, so that the suction liquid during the operation of the water suction pipe of the water pump 8 moves rightwards, and the impurities such as excrement and urine are favorably moved to the water suction pipe of the water pump 8 through the gradient of the inclined plate 5, so that the impurities such as excrement and urine are conveniently pumped away by the water suction pipe, the tail end of the water outlet pipe of the water pump 8 is inserted into the sewer pipe, the water outlet pipe of the water pump 8 discharges the liquid pumped by the water pump 8 into the sewer pipe, and the liquid is discharged through the sewer pipe;

a feeding frame 10 is fixedly connected to the support 1 and above each row of exposure cylinders 2, a rotating rod 11 is connected to the feeding frame 10 in a rotating mode, the rotating rod 11 is driven to rotate by a motor 12, as shown in fig. 5, the motor 12 is fixedly installed inside the feeding frame 10, an output shaft of the feeding frame 10 is connected with the rotating rod 11 through a synchronous belt, a supporting plate 13 is fixedly connected to the position right above each exposure cylinder 2 and above the feeding frame 10, a material box 14 is movably clamped on the supporting plate 13, a worm 15 is rotatably connected to the lower end of the material box 14, the material box 14 is bucket-shaped, feed is poured into the material box 14, the feed at the bottom of the material box 14 slides onto the worm 15, when the worm 15 rotates, the worm 15 rolls the feed to slide to the outside of the material box 14 towards the right side and then puts the feed into the exposure cylinders 2, and when the worm 15 stops rotating, the feed is accumulated in the material box 14, the feeding is finished, the rotating rod 11 drives the worm 15 to rotate through a gear structure, the gear structure comprises a gear fixed at one end of the worm 15, the gear structure further comprises a gear fixed on the side wall of the rotating rod 11, after the material box 14 is installed on the supporting plate 13, the two gears are meshed with each other, and then when the rotating rod 11 rotates, the rotating rod 11 drives the worm 15 to rotate.

Particularly, the right-hand member of support 1 is equipped with water storage bucket 16, and water storage bucket 16 is the container of storage mixing liquid, the top fixed mounting of water storage bucket 16 has agitating unit 17, and agitating unit 17 is the device of the inside solution of stirring water storage bucket 16, can make water and reagent mix more evenly, the water inlet of water storage bucket 16 passes through the pipe and is connected with the liquid outlet of proportioning pump 18, and proportioning pump 18 absorbs external clear water through the fresh water pipe to proportioning pump 18 absorbs the inside reagent of reagent bottle according to a certain proportion simultaneously, and clear water and reagent can be injected into the inside of water storage bucket 16 through the pipe after the inside of proportioning pump 18 mixes this moment for provide the required mixed liquid of changing of exposing 2 insides of jar, the delivery port of water storage bucket 16 is connected with booster pump 19, just the delivery port and every inlet tube 6 intercommunication of booster pump 19 are equipped with the pressure boost switch on the booster pump, a start-up and stop for controlling booster pump 19, when booster pump 19 starts up, booster pump 19 can pour into the inside of inlet tube 6 with the inside liquid of water storage bucket 16, then pour into the inside of exposing jar 2 through inlet tube 6, the delivery port of inlet tube 6 is 45 degrees with the contained angle that the jar wall that exposes jar 2 formed, through the cooperation with booster pump 19, when the delivery port of inlet tube 6 pours into liquid, the liquid that the delivery port of inlet tube 6 flows forms 45 degrees angles with the jar wall that exposes jar 2, makes easily then and exposes the inside liquid production swirl of jar 2, and the impurity such as excrement and urine of being convenient for is followed the discharge of middle part bushing 4 department of spacer 3 then to reduce the intensity of manual cleaning cylinder body.

Specifically, the water level control valve 7 comprises a shell 701, the shell 701 is connected in series to a water inlet pipe 6, a steering engine 702 is fixedly installed inside the shell 701, a bushing 703 is fixedly connected to an output end of the steering engine 702, a through hole 704 is formed inside the bushing 703, the through hole 704 is movably communicated with the water inlet pipes 6 at two ends of the shell 701, the output end of the steering engine 702 can drive the bushing 703 to rotate forward and backward, the forward and backward rotation amplitudes are 90 degrees, at this time, the through hole 704 can be communicated and staggered with the water inlet pipe 6, a float 705 is slidably connected to the lower end of the shell 701, a conducting strip 706 is fixedly connected to the inner end of the float 705, the conducting strip 706 is movably connected with a first contact 707 and a second contact 708 which are arranged on the inner side wall of the shell 701 and used for controlling the forward and backward rotation of the steering engine 702, a group of first contacts 707 and a group of, and the PWM module is electrically connected with the signal wire of the steering engine 702, and the PWM module of each water level control valve 7 is arranged in the control box 20.

Specifically, a control box 20 is fixedly connected to the support 1, the control box 20 is a device for controlling the system to operate, and a main switch (the initial working position of the steering engine 702 is that the through hole 704 is not communicated with the water inlet pipe 6 in a staggered manner), a timer for controlling automatic water changing and a timing device for controlling automatic feeding are arranged on the control box 20. The timer for controlling automatic water changing can control the starting and stopping time of the water pump 8, can set the time period (the pipe diameter size is certain, the passing time is the controllable flow) for automatically changing water, and can control the motor 12 to start and stop the time period for automatically feeding, namely, the feeding amount can be controlled through the time interval.

The float 705 is light in texture and small in density and can float on liquid, when the liquid level in the exposure cylinder 2 rises, the liquid in the exposure cylinder 2 reaches the height of the float 705 and continuously rises, the float 705 can slide upwards due to buoyancy, then the conducting strip 706 enables the two first contacts 707 in one group to be connected, signals are transmitted to the corresponding PWM module, then the PWM module sends pulse signals of the position to the steering engine 702 through a signal line, at the moment, the steering engine 702 drives the lining 703 to rotate forwards for 90 degrees and then stops, at the moment, after the lining 703 blocks the water inlet pipe 6, the water injection of the water inlet pipe 6 into the exposure cylinder 2 stops after the water inlet pipe 6 is closed, and the water level of the exposure cylinder 2 keeps stable;

after the water pump 8 draws water, the water level of the exposed cylinder 2 drops, the buoy 705 can slide downwards at the moment, the conducting strip 706 enables the two second contacts 708 in one group to be connected, so that signals are transmitted to the corresponding PWM module, then the PWM module sends pulse signals of the position to the steering engine 702 through a signal line, the steering engine 702 drives the bushing 703 to rotate reversely by 90 degrees to realize resetting, the water inlet pipe 6 is communicated through the through hole 704 at the moment, and the purpose of changing water while drawing water and injecting water is achieved.

Specifically, the outer side wall of the bushing 703 and the inner side wall of the housing 701 are engaged with the sealing rings 9 for sealing, and as shown in fig. 10, the number of the sealing rings 9 is two for sealing a gap between the bushing 703 and the side wall of the housing 701, thereby preventing water leakage at the gap.

In order to realize that when any one water inlet pipe 6 is in an open state through the water level control valve 7, the booster pump 19 can be automatically started; when all the water inlet pipes 6 are blocked by the water level control valves 7, the booster pump 19 stops working automatically, a group of third contacts 21 is added on each water level control valve 7, specifically, a group of third contacts 21 is further fixedly connected on the inner side wall of the housing 701 (when the conductive sheet 706 is in a corresponding position, the same group of first contacts 707, second contacts 708, and third contacts 21 can be conducted, and the conductive sheet 706 is provided with a regional patch conductive structure, so that no circuit disorder occurs), the third contacts 21 and the second contacts 708 are connected and separated with the conductive sheet 706 at the same time, when the float 705 slides downwards along with the liquid level, the conductive sheet 706 can also slide downwards along with the float to separate from the two third contacts 21 in the group, the group of third contacts 21 on the water level control valves 7 are connected in series in sequence through a lead and are connected in series in a switch circuit of a booster switch of the booster pump 19, as shown in fig. 13, it can be seen that a group of third contacts 21 on the water level control valves 7 are connected through a series circuit, as long as a group of third contacts 21 are not connected, the circuit of the booster switch is not closed, that is, when the water level measured by one water level control valve 7 does not reach a predetermined height (i.e., two first contacts 707 of the same group are not connected, that is, the water inlet pipe 6 is not blocked by the bushing 703), the booster pump 19 continues to operate, the booster switch is an electromagnetic switch, the booster pump 19 does not operate when the electromagnetic switch is powered on, the booster pump 19 operates when the electromagnetic switch is powered off, the booster switch has a structure as shown in fig. 15, the upper part is a contact piece of the commercial power, and when the electromagnet is not powered on, the upper part is pushed upwards by a spring below so that the two contact pieces form a passage through the electromagnet, thereby operating the booster pump 19, when the electromagnet is electrified, the electromagnet attracts the lower iron sheet, so that the upper two contact sheets cannot be electrified, and the booster pump 19 stops running. Therefore, the addition amount is controllable, automatic shutdown and starting of the booster pump 19 can be realized, the operation efficiency is improved, and the situation that the booster pump 19 is damaged due to pump holding caused by continuous work under the condition that a pipeline is closed is avoided.

In addition, sometimes, not all the exposure cylinders 2 on the system are used, only part of the exposure cylinders 2 may be used, in order to prevent waste of experimental materials, an on-off switch 22 is further provided on an outer side wall of the housing 701 of each water level control valve 7, two switch control bits on the on-off switch 22 are respectively connected in series in the wires of one set of second contacts 708 and one set of third contacts 21, and after the on-off switch 22 is pressed, one set of third contacts 21 is shorted and the wire of one set of second contacts 708 is disconnected, so that the circuit is switched on whether the conductive sheet 706 corresponding to the exposure cylinder 2 which is not subjected to the experiment contacts the circuit corresponding to the third contacts 21;

the control circuit diagram of the steering engine 702 with the two-position switch 22 is shown in fig. 14, when the two-position switch 22 is pressed, the circuit of the group of second contacts 708 is disconnected, no position information is sent to the PWM module no matter whether the conducting strip 706 can be contacted with the second contacts 708, so that the two-position switch 22 corresponding to the unnecessary exposure cylinder 2 is pressed before the experiment, the exposure cylinder 2 can be removed without water entering, and the automatic opening and closing of the booster pump 19 are not influenced, and the principle schematic diagram of the two-position switch 22 is shown in fig. 16.

The working principle is as follows: when in use, the two-position switch 22 corresponding to the unnecessary exposure cylinder 2 is pressed down, and then the water changing frequency, the time interval, the food throwing frequency and the food throwing interval are set through the timer on the control box 20;

when water is automatically changed, if the water pump 8 is powered on at 10 o ' clock in the morning and the water pump 8 is powered off at 10 o ' clock in the morning, namely the water pump 8 is powered off after being powered on at 10 o ' clock in the morning for 1 minute every day, the water change amount of each time is controlled by controlling the power-on duration of the water pump 8, after liquid inside the exposed cylinder 2 (positioned below the partition frame 3) is pumped away by the water pump 8, the liquid above the partition frame 3 flows to the lower part of the partition frame 3 from the leakage plate 4, the liquid level height of the exposed cylinder 2 is in a descending state, the water level control valve 7 conducts the water inlet pipe 6, and the pressurizing switch is not powered so that the two contact pieces are contacted to form a passage under the action of the spring, the liquid inside the water storage barrel 16 is injected into the exposed cylinder 2 after the pressurizing pump 19 is started, when the liquid is injected from the water outlet of the water inlet pipe 6, the flow of the liquid and the cylinder wall of the exposed cylinder 2 form, then be convenient for impurity such as excrement and urine is discharged from middle part bushing 4 of shelf 3, thereby reduce the intensity of manual cleaning cylinder body, when water pump 8 shut down, the liquid in the exposure jar 2 of experiment constantly rises, then corresponding multiunit third contact 21 is constantly put through in proper order (because it is that a plurality of exposure jars 2 come into water through a booster pump 19, different height, the position all can cause into water flow different, lead to full water time different), after all corresponding a set of third contact 21 was switched on, increase the switch circular telegram, make booster pump 19 shut down.

When the food is automatically fed, such as the food is fed at 8 am, 12 am and 5 pm, the motor 12 is set to be electrified for a period of time in the time period, for example, the power is cut off after the motor 12 is electrified for 5 seconds at 8 am, 12 am and 5 pm, at this time, the motor 12 drives the rotating rod 11 to rotate, at this time, the rotating rod 11 drives the worm 15 to rotate through a gear structure, so that the worm 15, when rotating, pulls the feed inside the magazine 14 from the right (as shown in fig. 6), and the feed automatically falls inside the exposure cylinder 2, therefore, automatic feeding operation can be realized, if a certain exposed cylinder 2 in each row of exposed cylinders 2 does not need to be fed, no feed is placed in the feed box 14 above the exposed cylinder 2 which does not feed, the feed box 14 can be taken down from the supporting plate 13, and when the motor 12 rotates, the feed can be fed to the exposed cylinder 2 which needs to feed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.