JPS6225413B2 - - Google Patents

Description

[Detailed description of the invention]

In the present invention, for example, a measuring tank, a mixing tank, and a liquid storage tank for a plurality of chemical solutions such as a soil hardening liquid used as a soil stabilizing liquid, a soil hardening accelerating liquid, etc. are connected in series with piping and each is arranged in series independently. This relates to a chemical liquid mixing and supplying device in which solenoid valves installed in each piping are connected by a synchronous operation circuit, and in particular, the solenoid valves of the pumps linked to the level detection devices attached to each of the measuring tanks are connected to each of the above. A measuring tank and a premixing device attached to the mixing tank are respectively provided opposite to each other, and another electromagnetic valve linked to another level detection device attached to the mixing tank is provided opposite to the liquid storage tank to enable continuous mixing and supply. The present invention relates to a chemical liquid mixing and supplying device. Conventionally, for example, as a chemical liquid mixing supply device for ground stabilizing materials, multiple systems in which metering mixing tanks and batch-type liquid storage tanks for multiple chemical liquids are connected in series with piping are each independently installed, and each piping is equipped with a manual valve. Generally, a visual level meter is attached to the metering and mixing tank. Therefore, the above-mentioned chemical liquid mixing and supplying device exhibits an excellent function for a one-shot system in which a single type of chemical liquid mixture or the like that has been mixed in advance is injected. However, for example, for soil stabilizing liquids as chemicals, quick curing gel time control is generally important from the viewpoint of compressive strength in the curing process and pollution control. For example, for instant setting type with gel time of 5 to 6 seconds, The 1.5-shot or 2-shot system, which mixes and injects the chemical into the liquid, has come into use, but it is difficult to apply the above-mentioned chemical liquid mixing and supply device having a batch-type liquid storage tank to these shot systems. was impossible. When the soil stabilizing solution is injected into the ground, a large amount of soil stabilizing solution is required, and a large amount of the chemical mixture cannot be generated within a short gel time, so it is necessary to generate a large amount of the chemical mixture in advance. Therefore, the above-mentioned conventional type chemical liquid mixing and supplying device not only has the disadvantage of large capacity and high cost, but also
There were also some troublesome problems with the management of transportation, etc. In addition, since the drug solution diluted from the original solution or the mixed drug solution is a large amount, if you try to inject 1.5 shots, it will be stored in a storage tank for a long time, and the drug solution may gel or deteriorate. However, there was also a disadvantage that the plurality of chemical solutions could not be subjected to a predetermined chemical reaction. Furthermore, since the level meter attached to the metering and mixing tank is visually checked, valve operations, etc. must be done manually, making on-site malfunctions inevitable, making it impossible to perform accurate equivalent reactions, which is a decisive flaw in ensuring a reliable chemical reaction process. There were some disadvantages as well. Particularly in recent years, when reactants have been manufactured in extremely small quantities with sensitively different reaction times and chemical properties of final products, there has been a problem in that the reaction cannot be controlled manually. An object of the present invention is to solve the problems of the batch-type chemical liquid mixing and supplying device based on the above-mentioned prior art, and to form a system in which a measuring tank, a mixing tank, and a liquid storage tank for a plurality of chemical liquids are connected in series with piping, and each of the plural systems is The above-mentioned drawbacks are eliminated by installing each independently in series and installing a solenoid valve linked to the level detection device attached to each tank in each supply/discharge pipe by connecting it to a synchronous circuit to create a flow type system. However, it is an object of the present invention to provide a novel chemical liquid mixing and supplying device that eliminates disadvantages and disadvantages and has excellent functions. The structure of the present invention in accordance with the above object is to synchronize and interlock pumps and solenoid valves interposed in the metering tank supply and discharge pipes for multiple chemical solutions arranged in independent lines using a level detection device attached to a measuring tank. The liquid is continuously weighed within a set time, supplied to the mixing tank in each series through a premixing device, and mixed.Then, the liquid is further stored in a storage tank via a synchronously operated solenoid valve installed in the mixing tank discharge pipe. ,
The gist of this is that the liquid is continuously supplied from each of the liquid storage tanks so that the reaction can be set accurately during the supply process or during the next reaction process. Next, one embodiment of the present invention that achieves the above object will be described below based on the drawings. In FIGS. 1 and 3, reference numeral 1 denotes a chemical solution mixing and supplying device as a soil stabilizing material, which is the gist of the present invention. As a composition liquid to be reacted and produced in two shots, A solution 3 is a water glass diluted solution obtained by diluting the water glass stock solution 2 to a predetermined value, and D is a mixed diluted solution of soil hardening solution B solution 4 and soil hardening accelerator solution C solution 5. This is provided to continuously generate and supply the liquid 5' to each individual in a flow manner. Therefore, a measuring tank 6 for diluting water of the stock solution 2, a measuring tank 7 for the B liquid 4, and a measuring tank 8 for the C liquid 5 are installed above the chemical mixing supply device 1, and the measuring tank 8 has a smaller bottom area and smaller capacity than the other measuring tanks 6, 7, and each measuring tank 6, 7, 8 is equipped with a well-known multi-stage localization level detecting device 9, 10 and a float type non-contact device. Step level detection device 11
Each one is decorated individually. Also, mixing tanks 12 and 13 are provided below each of the measuring tanks 6, 7, and 8, and each of the mixing tanks 12, 13 has a well-known multi-stage level detection device 14 on the inside side. , 15, mixers 16, 17 on the other internal sides, and well-known injectors 18, 19 as premixing devices in the center, respectively. Further, liquid storage tanks 23 and 24 having multi-stage level detection devices 20, 21 and 22 are provided below the mixing tanks 12 and 13, respectively. Note that 25 is a water tank attached to the liquid storage tanks 23 and 24. 1 is a pump chamber, in which pumps 27, 28, 29, 30 and solenoid valves 31, 32...38 are installed, and a tank chamber 39 is installed in the pump chamber 2. is attached, and the tank room 3
Storage tanks 40, 41, and 42 for the water glass stock solution 2, B solution 4, and C solution 5 are installed inside the tank 9, respectively. Further, 43 is a pipe for water, and the pipe 43
The metering tank 6 is connected to the water supply pipe (not shown) by interposing the pump 29 and the solenoid valves 34, 35, and 38.
Similarly, the pipes 44, 45, 46 for the water glass stock solution 2, B solution 4, and C solution 5 are connected to the liquid storage tank 25 and the injector 19, with pumps 30, 27, 28 interposed, and connected to the tanks 40, 41, 42 are connected to the injector 18 and the measuring tanks 7 and 8, respectively. Thus, 47, 48...51 are intermediate pipes, and the pipes 47, 48...51 are connected to the solenoid valves 33,
31, 32, 36, and 37, respectively, to connect the measuring tank 6 and the injector 18, the measuring tanks 7, 8 and the injector 19, and the mixing tanks 12, 13 and the liquid storage tank 2.
3 and 24 are connected in series. Further, 52 is a control panel, which is appropriately installed on the front of the plant frame as shown in FIG. 1, and the control panel 52 has an operation panel 53 shown in FIG. Sequence synchronization circuit 5
Interior 4. The pipes 58, 59, 60 with valves 55, 56, 57 are installed below the liquid storage tanks 23, 24, 25, respectively, and the tips of the pipes 58, 59 are connected to a double pipe for ground injection (not shown). It is connected to a pressure pump connected to the inner and outer tubes, allowing continuous two-shot injection. In the above configuration, the instant setting type soil stabilizing solution with a gel time of 5 to 6 seconds is reacted with two shot injection mode into the ground at a predetermined depth through a double pipe, and the composition liquids A liquid 3 and B liquid 4 are reacted. Mixing dilution D with C liquid 5
When supplying the liquid 5' to the inner and outer pipes of the double pipe, set the compressive strength and gel time for the specified depth of the ground to be injected in advance. If the relationship data between the compressive strength of the liquid and the liquid composition ratio is obtained in advance, the liquid composition ratio is determined based on that data.

[Table] In addition, as shown in the table below, from the data that is also known in advance, it is found that liquid C 5 has a large influence on the gel time even in an extremely small amount. 3. D liquid 5' liquid storage tank 2
3 and 24, and it is necessary to always store a certain amount. Therefore, the following measuring and mixing process is designed.

[Table] That is, for example, when injecting two shots of a soil stabilizer with a compressive strength of 6 kg/cm ² with a gel time of 5 to 6 seconds, if the predetermined knob for strength selection is set to 6 on the operation panel 53 and automatic start is started, the level will be detected. device 9,
10 and 11 are automatically selected to be detectable at the set level, and the pumps 27, 28, 29 and the solenoid valve 3
4, water and B and C liquids 4 and 5 stored in tanks 41 and 42 are simultaneously supplied and stored in measuring tanks 6, 7, and 8 at constant flow rates, respectively, in a simultaneous process. When the level of the liquid in the measuring tanks 6, 7, 8 reaches a predetermined level, the control system shown in FIG. pumps 27 and 28 are stopped, pump 30 is operated for a predetermined time, and solenoid valves 33, 31, 32, and 35 are opened, and solenoid valve 34 is stopped and each measuring tank 6,
Water measured in a predetermined time in a predetermined time at steps 7 and 8, liquid B 4, liquid C 5, water and tank 40 stored water glass 2
are supplied to the injector 18 at a predetermined ratio and mixed for primary pre-stirring, stored in the mixing tank 12, and secondly stirred via the constantly operating mixer 16. Meanwhile, the predetermined amounts of B liquid 4 and C liquid 5 are is the above-mentioned solenoid valve 31, 32
The water is metered by the opening of the electromagnetic valve 35 for a predetermined period of time, and the water is supplied to the injector 19 at a predetermined ratio and mixed in the mixing tank 1.
2 and is stored and stirred in the mixing tank 12 during the same process. Further, when the mixed stirring liquid in the mixing tanks 12 and 13 reaches a predetermined level, the level detection devices 14 and 15 simultaneously open and operate the solenoid valves 36 and 37 via a relay (not shown) by their level detection action, and the liquid storage tank 2
3 and 24 as A liquid 3 and D liquid 5'. The above-mentioned measuring, mixing and stirring processes are continuously repeated under the following control, and the liquid is sequentially supplied and stored in the liquid storage tanks 23 and 24, while the liquid storage tanks 23 and 24 storage A
Liquids 3 and D 5' are individually supplied to the inner and outer pipes of the double pipe connected to the ground through the opening of valves 55 and 56, and liquids A 3 and D 5' are mixed when injected from the nozzle. It reacts and is injected into the ground as a soil stabilizing liquid, which gels after a gel time of 5 to 6 seconds, improving and stabilizing the ground at a predetermined depth. By the level detection action of the level detection devices 36 and 37, when the liquid in the liquid storage tanks 23 and 24 rises and falls below the set level, the start and stop of processes before and after that are controlled, and the liquid storage A in the liquid storage tanks 23 and 24 is controlled. Liquid 3 and D liquid 5' are always maintained at predetermined levels. Incidentally, the water stored in the liquid storage tank 25 is used for cleaning the double pipe after the injection is completed. Further, the embodiments of the present invention are not limited to the embodiments described above, and it is of course possible to make various design changes to the embodiments. For example, the chemical solution used may be limited to a soil stabilizing solution mixed chemical solution. It can also be applied to other chemical solutions. As described above, according to the present invention, a measuring tank for a plurality of chemical solutions, a mixing tank equipped with a premixing device, and a liquid storage tank are connected in series by piping and arranged independently in series, and Since solenoid valves and pumps linked to the level detection device are synchronously installed in each supply and discharge pipe, it is basically possible to accurately measure minute amounts.
It is possible to perform a synchronous cycle of measuring and mixing and stirring processes, and therefore, there is an extremely excellent effect that the treated liquid stored in the storage tank can be supplied to the next stage of processing in conjunction with the mixing and stirring process. In addition, when mixing and supplying multiple large amounts of chemical solutions, the flow system can mix and agitate them before supplying them, so there is no need for a large-capacity storage tank that stores the liquids in advance as in the conventional technology, and the storage tank has a sufficient capacity to achieve level balance. The plant can be configured with a liquid tank, so the stored liquid will not deteriorate, and the chemical mixing device can be made more compact.
It has the excellent advantage of being easy to manage transportation, etc. and also making the equipment inexpensive, and it has a sensitive effect on reactions when supplied in small quantities, and when it affects equivalence reactions with other chemical solutions and the properties of products. , it is possible to automatically provide a weighing meter, which has an excellent effect of allowing automatic weighing design. In addition, since the measuring tank is equipped with a level detection device, it is possible to automatically measure with high precision, and there are no malfunctions that are not known in detail in the chemical process. Compared to mixing and stirring, which influences the gel time, this method has remarkable effects such as being able to accurately measure small amounts of feed, and making it possible to control the reaction time and the properties of the reaction product as desired. Furthermore, since the mixing tank is equipped with a pre-mixing device, when multiple chemical solutions are added to the mixing tank, they are pre-mixed, speeding up mixing and agitation in the mixing tank, and reducing the burden on the next-stage mixing tank. Therefore, there is an advantage that mixing and agitation can be carried out efficiently as a whole, and furthermore, a continuous cycle of the mixing and agitation process can be performed. In addition, since multiple tanks for chemical liquid concentrate are attached to each tank, preparation for chemical liquid supply is eliminated, such as eliminating the need to transport large volumes of diluted mixtures diluted and mixed in advance at factories, etc. to the site, as in the past. In some cases, it becomes simple.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic perspective view of the chemical liquid mixing device, FIG. 2 is a plan view of the operation panel, FIG. 3 is a working process diagram of the chemical liquid mixing device, and FIG. The figure is a schematic explanatory diagram of the control circuit inside the control panel. 6,7,8...Measuring tank, 12,13...Mixing tank, 23,24...Liquid storage tank, 31,32,33...
...Solenoid valve, 9,10,11...Level detection device,
18, 19... Premixing device, 36, 37... Other solenoid valves, 1... Chemical liquid mixing device.

Claims (1)

[Claims] 1 A chemical liquid mixed supply in which a measuring tank, a mixing tank, and a liquid storage tank for multiple chemical liquids are connected in series with piping, each independently arranged in series, and the solenoid valves installed in each piping are connected by a synchronous operation circuit. In the apparatus, each of the measuring tanks equipped with a level detection device and a premixing device connected to the mixing tank are connected via piping equipped with a solenoid valve that operates in conjunction with the level detection device, and the mixing A chemical liquid mixing and supplying device, characterized in that the tank is connected to a liquid storage tank via a pipe provided with another electromagnetic valve that is linked to another level detection device attached to the mixing tank.