JP3943993B2 - Osmotic injection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an osmotic injection device for injecting and infiltrating an osmotic injection material into the ground, and more particularly to a structure for injecting the osmotic injection material at a constant pressure.
[0002]
[Prior art]
In the osmotic injection method in which a chemical solution for improving the ground and a cleaning solution for purifying contaminated ground are injected into the ground as an osmotic injection material and infiltrated into the ground, the ground consisting of a sand layer is the target of construction. The sand forming the sand layer has a particle structure ranging from fine particles close to cohesive soil to coarse particle structures close to gravel. For this reason, the permeation resistance pressure when the infiltration material penetrates into the sand layer is relatively high in the sand layer close to the viscous soil, relatively low in the sand layer close to the gravel, Standard for sand layers with an intermediate grain structure.
[0003]
In general, in the osmotic injection method, quantitative injection is performed in which a fixed amount of osmotic injection material is fed into an injection line. This fixed amount is set based on the standard sand layer of the above-mentioned osmotic resistance pressure and considering the construction results. When the osmotic injection is performed by such a constant injection, the injected osmotic injection material can be uniformly infiltrated into the layer in the standard sand layer of the osmotic resistance pressure. However, in the sand layer with high osmotic resistance pressure close to viscous soil, it is difficult for the injected osmotic injection material to penetrate into the layer, so the sand layer is pressed and split by the osmotic injection material injected one after another, and this split Since the osmotic injection material flows in a concentrated manner at the location, the osmotic injection material cannot be uniformly infiltrated into the layer. On the other hand, in the sand layer with low osmotic resistance pressure close to gravel, since the osmotic injection material easily penetrates into the layer, a larger amount of osmotic injection material can be infiltrated than the standard sand layer of osmotic resistance pressure, Due to the constant injection, the osmotic injection material can be injected only up to a certain amount, and the osmotic injection material cannot be infiltrated into the layer at an injection amount according to the layer state.
[0004]
In order to solve the above problem, a constant pressure injection type osmotic injection device 50 shown in FIG. 4 is used. In FIG. 4, reference numeral 51 denotes an injection line, which injects the osmotic injection material L stored in the storage tank 52 into the ground G from an injection port 51 a arranged in the ground G. In this injection line 51, a flow meter 53 for measuring the flow rate of the osmotic injection material L flowing through the injection line 51, a pump P for sucking the osmotic injection material L from the inside of the tank 52 and pumping it into the ground G, A flow rate control valve 54 for adjusting the flow rate of the osmotic injection material L flowing through the injection line 51 and a pressure sensor 55 for detecting a change in injection pressure when the osmotic injection material L is injected into the ground G are installed. A control device 56 is electrically connected to the flow meter 53, the flow control valve 54, and the pressure sensor 55. The control device 56 controls the flow control valve 54 based on the injection pressure detected by the pressure sensor 55. To do. For example, when the injection pressure detected by the pressure sensor 55 is high, the control device 56 reduces the flow rate of the permeation injection material L flowing through the injection line 51 by reducing the opening degree of the flow control valve 54. Thereby, the injection amount of the osmotic injection material L injected into the ground G is reduced, and the injection pressure of the osmotic injection material L is lowered. On the other hand, when the injection pressure detected by the pressure sensor 55 is low, the control device 56 increases the opening of the flow control valve 54 and increases the flow rate of the permeation injection material L flowing through the injection line 51. Thereby, the injection amount of the osmotic injection material L injected into the ground G increases, and the injection pressure of the osmotic injection material L increases. That is, the control device 56 increases or decreases the injection amount of the osmotic injection material L into the ground G according to the change in the injection pressure of the osmotic injection material L, and always maintains the injection pressure of the osmotic injection material L constant. In addition, this fixed injection pressure is set in consideration of a construction record and the like while being based on a standard sand layer of osmotic resistance pressure.
[0005]
When osmotic injection is performed by the osmotic injection device 50 described above, in the sand layer having a high osmotic resistance pressure, since the osmotic injection material L hardly penetrates into the layer at first, the injection pressure of the osmotic injection material L becomes high. Immediately, the pressure sensor 55 detects this change in the injection pressure, and the control device 56 controls the flow rate control valve 54 to reduce the injection amount of the osmotic injection material L and lower the injection pressure of the osmotic injection material L. Use a constant pressure. As a result, the penetration injection material L penetrates uniformly into the layer without splitting in the layer due to the injection of the penetration injection material L. On the other hand, in the sand layer having a low osmotic resistance pressure, since the osmotic injection material L easily penetrates into the layer at first, the injection pressure of the osmotic injection material L becomes low. The control device 56 controls the flow rate control valve 54 to increase the injection amount of the osmotic injection material L and raise the injection pressure of the osmotic injection material L to a constant pressure. As a result, a sufficient amount of the infiltration material L is injected into the sand layer and penetrates. That is, the permeation injection material L can be injected with an injection amount corresponding to the permeation resistance pressure of the sand layer in the ground G and can be uniformly permeated into the ground G.
[0006]
In addition, in a sand layer having a considerably low osmotic resistance pressure (a sand layer very close to a gravel layer), the osmotic injection material L penetrates infinitely into the layer. There is a risk of injecting the material L in vain, but in this case, when the flow rate measured by the flow meter 53 exceeds a predetermined flow rate, the control device 56 reduces the opening of the flow rate control valve 54 to infiltrate. The injection amount of the material L is regulated.
[0007]
[Problems to be solved by the invention]
However, in the conventional osmotic injection device 50, in order to inject the osmotic injection material L at an injection amount corresponding to the osmotic resistance pressure of the ground G without waste and to infiltrate uniformly into the ground G, the pressure sensor 55 and the flow rate Although it is necessary to install a control device 56 that controls the flow rate control valve 54 based on the detection result from the total 53, this control device 56 is very expensive because of complicated control, and the equipment of the osmotic injection device 50 There is a problem that the cost becomes high.
[0008]
The present invention solves the above-mentioned problems, and the problem is to inject the osmotic injection material with an injection amount according to the osmotic resistance pressure of the ground without waste and to infiltrate uniformly into the ground. It is in providing the osmotic injection device which simplified the structure of this and reduced the installation cost.
[0009]
[Means for Solving the Problems]
An osmotic injection device according to the present invention temporarily stores an osmotic injection material, and stores a storage tank in which the inside is maintained at a constant gas pressure, and an osmotic injection material fed from the storage tank at a constant gas pressure in the ground. A volume-type rotary supply device having an injection line for injecting into the liquid, a rotary body that is installed in the injection line and is rotated by the osmotic injection material that is sent out, and a rotary body connected to the rotary body to regulate the maximum rotational speed of the rotary body And a regulating clutch.
[0010]
In this way, since the osmotic injection material is sent out from the storage tank to the injection line with a constant gas pressure, the osmotic injection material is injected into the ground without splitting the ground. If the pressure is set to a pressure that can be applied, the infiltration material can be injected at an injection amount corresponding to the permeation resistance pressure of the ground, and can be uniformly permeated into the ground. Also, in the case of ground with a considerably low osmotic resistance pressure, the regulating clutch regulates the maximum number of rotations of the rotary body of the positive displacement rotary supply device, so that the osmotic injection material delivered to the injection line is positive displacement rotary type Since the maximum injection amount injected into the ground when passing through the supply device is regulated, the injection amount of the osmotic injection material does not become excessive, and it is possible to prevent the osmotic injection material from being injected unnecessarily. As a result, it is not necessary to provide an expensive control device as shown in FIG. 4, and it is possible to simplify the configuration for injecting the osmotic injection material at a constant pressure and to reduce the equipment cost of the osmotic injection device.
[0011]
Moreover, in the osmotic injection device according to the present invention, two storage tanks are provided, and while the osmotic injection material is sent from one storage tank to the injection line, the other storage tank is replenished with the osmotic injection material, It is preferable to perform delivery and replenishment by alternately switching between the two storage tanks.
[0012]
When osmotic injection is performed in one tank, the supply of the osmotic injection material from the storage tank to the injection line is stopped while the osmotic injection material is supplied to the storage tank, and the injection of the osmotic injection material into the ground is interrupted. However, by providing the two storage tanks as described above, the osmotic injection material can be replenished in the other storage tank while the osmotic injection material is sent out in one storage tank. The injection of the osmotic injection material into the ground can be performed continuously without interruption. As a result, it is possible to significantly reduce the time for infiltration injection.
[0013]
In the osmotic injection device according to the present invention, a retractable diaphragm for separating the gas phase part maintained at a constant gas pressure from the liquid phase part made of the osmotic injection material is provided inside the storage tank. preferable.
[0014]
When purifying contaminated ground, an anaerobic purifying liquid is used as the infiltration material, and the tank is filled with an inert gas so that the purifying liquid can be sent from the tank to the pouring line without being oxidized. Although necessary, since this inert gas is expensive, there is a problem that the material cost increases. Therefore, by providing the above-mentioned diaphragm inside the tank, even if the tank is filled with air that does not require material costs, there is no risk that the purification liquid will come into contact with the air and be oxidized and denatured. Since the liquid can be sent out from the tank to the injection line, an inert gas is unnecessary, and the material cost can be greatly reduced.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of an osmotic injection device according to the present invention, FIG. 2 is an operation principle diagram of a rotary feeder provided in the osmosis injection device, and FIG. 3 is an operation principle diagram of a regulating clutch provided in the osmosis injection device.
[0016]
In FIG. 1, reference numeral 100 denotes an osmotic injection device, which injects and infiltrates a chemical solution for ground improvement and a purification solution for purification of contaminated ground into the ground G as an osmotic injection material L. In the osmotic injection method implemented using this osmotic injection device 100, the ground G composed of a sand layer is the object of construction. Reference numerals 1a and 1b denote two storage tanks for temporarily storing the osmotic injection material L, and the inside of the tanks 1a and 1b is separated from the gas phase portion Ka made of air K and the osmotic injection material L by the stretchable diaphragm 2. The liquid phase portion La is isolated. When the anaerobic purification liquid is used as the osmotic injection material L, the diaphragm 2 prevents the purification liquid from being oxidized and denatured by the air K inside the tanks 1a and 1b. 3 is a stirrer which stirs the osmotic injection material L in the tanks 1a and 1b, and prevents the osmotic injection material L from being precipitated or solidified in the tanks 1a and 1b. A wire mesh 4 is provided inside the tanks 1a and 1b. When the osmotic injection material L is sent out from the tanks 1a and 1b as will be described later, the diaphragm 2 that decreases with the water level of the osmotic injection material L is a stirrer 3. To prevent tangling. Reference numeral 5 denotes a water level detection sensor installed in the tanks 1a and 1b, which detects whether or not the water level of the infiltration material L has fallen below a predetermined water level.
[0017]
Supply / exhaust lines 6a and 6b for supplying air K to the inside of the tanks 1a and 1b or exhausting the air K inside the tanks 1a and 1b are connected to the upper portions of the respective tanks 1a and 1b. These supply / exhaust lines 6 a and 6 b are connected to the compressor 8 through the common line 7. The compressor 8 compresses air in the atmosphere and sends it out to the common line 7. In addition, on-off valves 9a, 9b and pressure release valves 10a, 10b are respectively installed in the supply / exhaust lines 6a, 6b, and a pressure adjusting valve 11 is installed in the common line 7. .
[0018]
As a result, when the on-off valves 9a and 9b of the supply and exhaust lines 6a and 6b are opened and the pressure release valves 10a and 10b are closed, the air K sent from the compressor 8 is adjusted to a constant pressure by the pressure adjusting valve 11. Thereafter, the air is supplied into the tanks 1a and 1b through the common line 7, the on-off valves 9a and 9b, and the air supply and exhaust lines 6a and 6b, and the inside of the tanks 1a and 1b is maintained at a constant gas pressure as described later. . On the other hand, when the open / close valves 9a, 9b of the supply / exhaust lines 6a, 6b are closed and the pressure release valves 10a, 10b are opened, the air K in the tanks 1a, 1b passes through the supply / exhaust lines 6a, 6b. The fixed gas pressure exhausted to the outside from 10a and 10b and held in the tanks 1a and 1b is released.
[0019]
Further, at the lower part of each tank 1a, 1b, a supply / discharge port for discharging the osmotic injection material L stored in the tanks 1a, 1b or supplying the osmotic injection material L to the inside of the tanks 1a, 1b. 13a, 13b are connected, and these supply / discharge ports 13a, 13b are connected to the injection line 15 and the replenishment line 18 via the three-way switching valves 14a, 14b. The injection line 15 is an injection path for injecting the osmotic injection material L discharged from the inside of the tanks 1a, 1b into the supply / discharge ports 13a, 13b into the ground G from the injection port 15a installed in the ground G. Is provided with a rotary feeder 16 which will be described later. The injection line 15 is divided into an injection line 15t on the tanks 1a and 1b side and an injection line 15g on the ground G side with the rotary feeder 16 in between. The replenishment line 18 is a replenishment path for replenishing a large amount of the permeation injection material L stored in the replenishing tank 19 into the tanks 1a and 1b from the supply and discharge ports 13a and 13b. And a pump P are installed. Reference numeral 21 denotes a diaphragm for isolating the infiltrated injection material L stored in the replenishing tank 19 from the air in the atmosphere.
[0020]
In the above configuration, it is assumed that the tank 1a is in operation and the tank 1b is inactive. The tank 1a is in a state in which the inside is maintained at a constant gas pressure, and when the three-way switching valve 14a is switched so that the supply / exhaust port 13a and the injection line 15 communicate with each other as shown in FIG. 1, the tank 1a is stored in the tank 1a. The osmotic injection material L that has been transferred is sent to the injection line 15t through the supply / discharge port 13a by a constant gas pressure inside the tank 1a. Then, the infiltration material L sent out to the injection line 15t is then injected into the ground G from the injection port 15a through the rotary feeder 16 and the injection line 15g and penetrates. Here, the constant gas pressure inside the tank 1a is injected into the ground G and penetrates without causing the ground G to split the ground injecting material L fed from the tank 1a and injected into the ground G. The pressure is set to be able to. On the other hand, the gas pressure inside the tank 1b is opened by the pressure release valve 10b. When the three-way switching valve 14b is switched so that the supply / exhaust port 13b and the supply line 18 communicate as shown in FIG. The osmotic injection material L stored in the tank 1 is sucked into the pump P and supplied into the tank 1b through the supply line 18 and the supply / discharge port 13b.
[0021]
When one of the switching valves 14a and 14b communicates the supply / exhaust port and the replenishment line 18, the other switching valve communicates the supply / exhaust port and the injection line 15t. It can be switched alternately. As a result, the replenishment of the osmotic injection material L into the tanks 1a and 1b and the delivery of the osmotic injection material L from the tanks 1a and 1b to the injection line 15t are alternately switched between the two tanks 1a and 1b. Done. The switching of the two switching valves 14a and 14b is performed when the water level detection sensor 5 detects that the water level of the osmotic injection material L in one of the tanks 1a and 1b has dropped below a predetermined water level. This is done manually or automatically.
[0022]
The rotary feeder 16 installed in the injection line 15 is an example of a positive displacement rotary supply device according to the present invention. As shown in FIG. 2, the rotor is a rotating body inside the main body 16a. 16b is rotatably arranged. The rotor 16b is equipped with six vanes (blades) 16c protruding in the radial direction, and the vanes 16c are always pressed against the inner surface of the main body 16a by a spring 16d. Further, the axial center Q of the rotor 16b is shifted from the center O of the main body portion 16a by a predetermined dimension, and the rotor 16b is provided eccentrically with respect to the main body portion 16a. For this reason, six space portions X having different volumes, which are partitioned by the six vanes 16c, are formed between the rotor 16b and the main body portion 16a. Such a rotary feeder 16 applies a known vane pump structure. The vane pump is described in, for example, Japanese Patent Application Laid-Open No. 11-37062. In the vane pump, the rotor is rotated by a motor, but in the rotary feeder 16 of the present embodiment, the rotor 16b is rotated by the permeation injection material L. That is, when the osmotic injection material L sent from the tanks 1a and 1b to the injection line 15t enters the internal space portion X, the rotor 16b rotates in the R direction in which the volume of the space portion X is expanded by the osmotic injection material L. . Then, when the rotor 16b further rotates in the R direction, the volume of the space portion X into which the osmotic injection material L has entered is reduced, and the osmotic injection material L is discharged from the space portion X to the injection line 15g.
[0023]
In FIG. 1, reference numeral 17 denotes a regulation clutch that regulates the maximum rotational speed of the rotor 16 b of the rotary feeder 16. As shown in FIG. 3, the clutch 17 includes a claw wheel 17a that is fixed to a rotor shaft 16e that is a rotation shaft of the rotor 16b, and a rotating plate 17b that is rotatably supported by the rotor shaft 16e. The rotating plate 17b is driven by the motor 17d (FIG. 1) and rotates in the R direction at a predetermined rotational speed independently of the rotor 16b, and the claw 17c meshing with the claw wheel 17a on the side surface is rotated through the shaft 17e. Connected freely.
[0024]
As described above, when the permeation injection material L enters the rotary feeder 16 and the rotor shaft 16e rotates in the R direction by the restriction clutch 17, the rotational speed of the rotor shaft 16e is less than the rotational speed of the rotating plate 17b. At this time, the claw wheel 17a and the claw 17c do not mesh with each other, and the rotor shaft 16e rotates freely. On the other hand, when the rotational speed of the rotor shaft 16e becomes equal to or higher than the rotational speed of the rotating plate 17b, the ratchet wheel 17a and the claw 17c are engaged with each other as shown in FIG. 3, and the rotor shaft 16e is integrated with the rotating plate 17b. Rotate at That is, the rotational speed of the rotor 16b cannot exceed the rotational speed of the rotary plate 17b, and the maximum rotational speed of the rotor 16b is regulated by the rotational speed of the rotary plate 17b. As a result, the maximum discharge amount is regulated when the osmotic injection material L sent from the tanks 1a and 1b to the injection line 15t is discharged to the injection line 15g through the rotary feeder 16 as described above. Therefore, the maximum injection amount of the permeation injection material L into the ground G is also regulated.
[0025]
Next, the operation of each part when performing the osmotic injection method using the osmotic injection device 100 described above will be described. First, the penetrant L is replenished inside either the tank 1a or the tank 1b. Here, the permeation injection material L is supplied to the tank 1a first. The on-off valve 9a of the supply / exhaust line 6a connected to the tank 1a is closed, the pressure release valve 10a is opened, and then the switching valve 14a is switched so that the supply / exhaust port 13a and the supply line 18 communicate with each other. At this time, in the tank 1b, the switching valve 14b is switched so that the supply / exhaust port 13b and the supply line 18 do not communicate with each other. And the osmotic injection material L stored in the replenishing tank 19 is replenished to the inside of the tank 1a by the pump P through the replenishment line 18 and the supply / discharge port 13a. When the osmotic injection material L is supplied into the tank 1a, the on-off valve 9a is opened, the pressure release valve 10a is closed, and the air K sent from the compressor 8 is adjusted to a constant pressure by the pressure adjustment valve 11, Air is supplied to the inside of the tank 1a through the common line 7 and the supply / exhaust line 6a, and the inside of the tank 1a is maintained at a constant gas pressure.
[0026]
When the inside of the tank 1a is maintained at a constant gas pressure, the switching valve 14a is switched so that the supply / discharge port 13a and the injection line 15t communicate with each other (state shown in FIG. 1). At this time, in the tank 1b, the open / close valve 9b of the supply / exhaust line 6b is closed, the pressure release valve 10b is opened, and the switching valve 14b is switched so that the supply / exhaust port 13b and the replenishment line 18 communicate with each other (state shown in FIG. 1). ), The osmotic injection material L stored in the supply tank 19 is supplied to the inside of the tank 1b by the pump P through the supply line 18 and the supply / discharge port 13b. When the osmotic injection material L is supplied to the inside of the tank 1b, the on-off valve 9b is opened, the pressure release valve 10b is closed, and the inside of the tank 1b is maintained at a constant gas pressure as in the tank 1a. To do. In the tank 1a, when the supply / discharge port 13a and the injection line 15t communicate with each other, the osmotic injection material L is sent from the inside of the tank 1a to the injection line 15t with a constant gas pressure. The osmotic injection material L sent to the injection line 15t passes through the rotary feeder 16 while rotating the rotor 16b while receiving a constant gas pressure, and is sent to the injection line 15g. It is injected into the ground G and penetrates.
[0027]
At this time, since the constant gas pressure inside the tank 1a is set to a pressure at which the infiltration injecting material L can be injected into the ground G without splitting the ground G and penetrate the ground G, When the osmotic resistance pressure is high, the injection amount of the osmotic injection material L decreases according to the osmotic resistance pressure, and when the osmotic resistance pressure of the ground G is low, the injection amount of the osmotic injection material L according to the osmotic resistance pressure Increase. That is, the permeation injecting material L is injected at a constant gas pressure in an injection amount corresponding to the permeation resistance pressure of the ground G, and penetrates into the ground G uniformly. Further, when the permeation resistance pressure of the ground G is considerably low, the restriction clutch 17 restricts the maximum rotation speed of the rotor 16b of the rotary feeder 16, so that the permeation injection material L penetrates when passing through the rotary feeder 16. The maximum injection amount of the injection material L into the ground G is regulated.
[0028]
When the osmotic injection material L continues to be injected into the ground G from the inside of the tank 1a, the water level of the osmotic injection material L inside the tank 1a falls below a predetermined water level, and the water level detection sensor 5 detects this drop in water level. In response to the detection of the water level detection sensor 5, the switching valve 14a is switched so that the supply / exhaust port 13a communicates with the replenishment line 18, and the switching valve 14b is communicated with the supply / exhaust port 13b and the injection line 15t. Switch as follows. As a result, the delivery of the infiltrated injection material L from the inside of the tank 1a to the injection line 15t is stopped, and the delivery of the infiltration material L from the inside of the tank 1b to the injection line 15t is started instead. The injection material L passes through the inside of the rotary feeder 16 and the injection line 15g while receiving a constant gas pressure, and is injected into the ground G from the injection port 15a and penetrates. At this time, in the tank 1a, the on-off valve 9a is closed, the pressure release valve 10a is opened, and the osmotic injection material L stored in the supply tank 19 is supplied into the tank 1a. When the osmotic injection material L is supplied to the inside of the tank 1a, the on-off valve 9a is opened, the pressure release valve 10a is closed, and the inside of the tank 1a is kept at a certain gas pressure by the air K supplied from the compressor 8. To prepare for the next step of feeding out the penetrant injection material L.
[0029]
By doing as described above, the permeation injection material L is sent out from the storage tanks 1a and 1b to the injection line 15t with a constant gas pressure, and injected into the ground G through the rotary feeder 16 and the injection line 15g. When the constant gas pressure inside each tank 1a, 1b is set to a pressure at which the osmotic injection material L is injected into the ground G without splitting the ground G, the osmotic injection material L It can be injected with an injection amount corresponding to the permeation resistance pressure of the ground G, and can be uniformly infiltrated into the ground G. Further, in the case of the ground G having a considerably low permeation resistance pressure, the regulation clutch 17 regulates the maximum rotation speed of the rotor 16b of the rotary feeder 16, so that the permeation injection material L fed to the injection line 15t is transferred to the rotary feeder 16. Since the maximum injection amount that is discharged to the injection line 15g and injected into the ground G is regulated when passing through the inside of the interior, the injection amount of the permeation injection material L does not become excessive, and the permeation injection material L is injected wastefully Can be prevented. As a result, it is not necessary to provide an expensive control device 56 as shown in FIG. 4, and it is possible to simplify the configuration for injecting the osmotic injection material L at a constant pressure and to reduce the equipment cost of the osmotic injection device 100. Become.
[0030]
In addition, two storage tanks 1a and 1b are provided, and the osmotic injection material L feeding step and the replenishment step are alternately switched between the two tanks 1a and 1b to perform the osmotic injection in one tank. In addition, while supplying the osmotic injection material L to the tank, there is no need to stop the injection operation by stopping the delivery of the osmotic injection material L from the tank. For this reason, it is possible to continuously inject the osmotic injection material L into the ground G, and it is possible to greatly shorten the work period of the osmotic injection.
[0031]
Furthermore, in the case of purifying the contaminated ground by providing a diaphragm 2 that isolates the gas phase portion Ka made of air K and the liquid phase portion La made of the osmotic injection material L in the tanks 1a and 1b, the osmotic injection is performed. When an anaerobic purification liquid is used as the material L, the tank 1a, 1b does not oxidize and change the purification liquid even if the tank 1a, 1b is filled with air K, which does not require material costs. Therefore, expensive inert gas is not required and material costs can be greatly reduced.
[0032]
In the embodiment described above, in order to maintain the inside of the tanks 1a and 1b at a constant gas pressure, the air is adjusted to a constant pressure by the compressor 8 and the pressure regulating valve 11 and sent into the tanks 1a and 1b. Although the case is given as an example, the present invention is not limited to this. In addition to this, air is adjusted to a constant pressure by a pump and a pressure gauge and sent into the tanks 1a and 1b. May be. That is, it is only necessary that the air in the atmosphere be adjusted to a constant pressure and sent into the tanks 1a and 1b.
[0033]
Moreover, in the said embodiment, although the rotary feeder 16 which has the rotor 16b which mounted | wore with the six vanes 16c is mentioned as an example as a positive displacement rotary supply apparatus, this invention is not limited only to this. For example, a rotary feeder having a rotor with two vanes attached thereto, or a rotary feeder having a rotor with rubber vanes attached instead of the vanes 16c and the springs 16d may be used. Further, the positive displacement rotary supply device is not limited to the one using the vane pump structure as described above, but may be one using another structure. For example, a pair of meshed gears (corresponding to a rotating body) rotate in close contact with the inner wall of the main body, and the liquid confined in the space formed between the concave portion of the gear and the inner wall of the main body is discharged by the rotation of the gear. A circumscribed gear pump structure may be used. Alternatively, the structure of an inscribed gear pump (trochoid pump) in which liquid is discharged by expanding or shrinking the space between the rotors by rotation of two eccentric inner and outer rotors (corresponding to a rotating body) having different numbers of teeth May be used. That is, the positive displacement rotary supply device according to the present invention guides the osmotic injection material L fed into the inside from the injection line 15t to the closed space formed by the rotator, and rotates the rotator, thereby a certain amount of permeation. Any material that can discharge the injection material L to the injection line 15g may be used.
[0034]
Furthermore, in the above embodiment, the rotary feeder is provided by the meshing mechanism of the claw wheel 17a fixed to the rotor shaft 16e and the claw 17c rotatably connected to the rotating plate 17b rotatably supported by the rotor shaft 16e. Although the case where the regulation clutch 17 which regulates the maximum number of rotations of the 16 rotors 16b to be equal to or less than the number of rotations of the rotating plate 17b is described as an example, the present invention is not limited to this. In addition to this, for example, when a plurality of cams are interposed between the rotor shaft 16e and the rotating plate 17b, and the rotational speed of the rotor shaft 16e becomes equal to or higher than the rotational speed of the rotating plate 17b, the cam is moved to the rotor shaft 16e. A cam clutch provided with a meshing mechanism that meshes with the rotating plate 17b and rotates the rotor shaft 16e together with the rotating plate 17b at the number of rotations of the rotating plate 17b. That is, the restriction clutch may be any clutch provided with a mechanism for restricting the rotation speed of the rotor 16b to be equal to or lower than the rotation speed of the rotating plate 17b.
[0035]
【The invention's effect】
According to the present invention, since the osmotic injection material is sent out from the inside of the storage tank to the injection line at a constant gas pressure, the osmotic injection material is injected at an injection amount corresponding to the osmotic resistance pressure of the ground, and uniformly penetrates into the ground. Can be made. Further, in the case of the ground having a considerably low permeation resistance pressure, the maximum injection amount of the permeation injecting material is regulated by the regulation clutch, so that it is possible to prevent the permeation injecting material from being wastefully injected into the ground. As a result, it is not necessary to provide an expensive control device as in the prior art, and the configuration of the osmotic injection device can be simplified to reduce the equipment cost.
[Brief description of the drawings]
FIG. 1 is an overall view showing an osmotic injection apparatus according to the present invention.
FIG. 2 is an operation principle diagram of a rotary feeder provided in the osmotic injection device.
FIG. 3 is an operation principle diagram of a regulation clutch provided in the osmotic injection device.
FIG. 4 is an overall view showing a conventional osmotic injection device.
[Explanation of symbols]
1a Storage tank
1b Storage tank
2 diaphragm
15 Injection line
15t injection line
15g injection line
16 Rotary feeder
16b rotor
17 Restricted clutch
100 Osmotic injection device
G ground
K air
Ka gas phase
L Penetration injection material
La liquid phase part

Claims (3)

In the osmotic injection device that injects and infiltrates the osmotic injection material into the ground,
A storage tank in which the osmotic injection material is temporarily stored and the inside is maintained at a constant gas pressure;
An injection line for injecting into the ground an osmotic injection material delivered by the constant gas pressure from the storage tank;
A positive displacement rotary supply device having a rotating body installed in the injection line and rotated by an osmotic injection material delivered;
An osmotic injection device comprising: a regulation clutch coupled to the rotator and regulating a maximum number of rotations of the rotator. The osmotic injection device according to claim 1,
Two storage tanks,
While the osmotic injection material is sent from one storage tank to the injection line, the osmotic injection material is replenished to the other storage tank, and the delivery and supply of the osmotic injection material are alternately switched between the two storage tanks. Osmotic injection device. The osmotic injection device according to claim 1 or 2,
An osmotic injection device characterized in that a retractable diaphragm for separating a gas phase portion maintained at a constant gas pressure and a liquid phase portion made of an osmotic injection material is provided inside the storage tank.

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