JP2706050B2 - Discharge device for liquid material with filler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dispensing a fixed amount of a liquid material containing a filler, for example, a liquid material mixed with a filler having a fragmented shape without causing clogging of the filler. Things.

[0002]

2. Description of the Related Art As a quantitative discharge device for a liquid material containing a filler, for example, a cement for filling and sealing a cement resistor, as shown in a longitudinal sectional view in FIG. 3, a cement 102 is placed in a container 101 such as a syringe. Accommodate and stir blades 10
3 is rotated to prevent sedimentation of the filler 104, while applying an air pulse from an air-type dispenser controller (not shown) to the container 101 to remove the cement 102 from the needle or other thin tube 105 attached to the lower end of the container 101. As shown in a vertical sectional view in FIG. 4, the cement 102 contained in the pressurized container 106 is compressed by pressurized air through a tube or a hose 107 into a valve 10 as shown in a vertical sectional view in FIG.
8 and the operation of the valve 108, for example, the needle 109, is controlled by the dispenser controller 110, so that the small-diameter nozzle attached to the lower end of the valve 108.
One that discharges cement 102 at a fixed rate from 111,
There is a method in which the pressure of cement is sent to the automatic valve 108 by a so-called pinch tube method.

[0003]

However, among the prior arts shown in FIG. 3, cement 102
When the liquid is discharged, a narrowed portion occurs in the flow before it reaches the small-diameter opening at the lower end of the container.
Since the flow restricts again when flowing into 105, the fillers 104 in the cement flow close to each other, and each filler has a strong tendency to restrain each other's flow. When the discharge flow is stopped, the settling of the filler 104 is accompanied by the
There is a problem that a large number of fillers 104 are aggregated at the inlet portion to 5, causing a substantial blockage of the capillary 105.

[0004] In the prior art shown in FIG. 4, in particular, by closing the needle 109, FIG.
As shown in FIG. 5, when the flow path is narrowed, almost the same phenomenon as described above occurs, and under the completely closed state of the valve, as shown in FIG. A large amount of filler 104 accumulates and aggregates to close the valve opening, and at the same time, the aggregated filler 104
There was also the problem of damaging the valve seat during the subsequent closing operation of 109.

[0005] Furthermore, in the pinch tube method in which the flexible tube is sandwiched by the rotor and the cement is pumped under the crushing deformation of the tube, there is a problem that damage to the tube by the filler is inevitable.

The present invention has been made as a result of studying to solve all of the problems of the prior art, and an object of the present invention is to sufficiently flush a discharge path of a liquid material containing a filler. By doing so, it is possible to prevent not only the valve seat damage but also the blockage of the discharge path effectively, and furthermore, a simple and small discharge device for liquid material containing a filler, which eliminates the need for tubes and hoses etc. Is to provide.

[0007]

The discharge device for a liquid material containing a filler according to the present invention has a relatively large diameter, and is often provided at a lower end of a container for a liquid material containing a filler which allows insertion of an electric stirring blade. A discharge passage having a substantially uniform inner diameter is provided up to the discharge port, and in the discharge path, at a position near the discharge port,
A rotary valve body provided with a through passage, preferably a valve having a substantially spherical rotary valve body, is arranged, and a reciprocating pump, preferably a plunger pump, a piston, is provided upstream of the valve in the discharge passage. Pumps or membrane pumps are connected via reciprocating passages located in parallel with each other. Here, more preferably, the size of the through passage of the rotary valve body is made substantially equal to the inner diameter of the discharge passage.

[0008]

In the device constructed as described above, a discharge passage having a substantially uniform inner diameter is provided at the lower end of the container up to the discharge port, and the reduced diameter portion does not exist in the discharge passage. Therefore, even when the discharge of the filler-containing liquid material is stopped, there is no possibility that the filler will settle and deposit only at a specific portion of the discharge passage. Further, since the valve for controlling the discharge and stop of the liquid material has a rotary valve body having a through-passage and having a cylindrical or frusto-conical shape, for example, when the valve is closed, the valve rotates. Even if fillers settle and accumulate on the valve body, by opening the valve and aligning the through passage of the rotary valve body with the discharge passage, the accumulated filler on the valve body enters the through passage. Since the ink is scraped off and discharged, the discharge passage including the through passage is not blocked by the filler. In addition, since the rotary valve element opens and closes the valve based on its rotational displacement, the filler is not caught between the valve element and the valve seat. Since there is no contact with the filler, the durability of the valve can be greatly improved.

Further, when the discharge of the liquid material is stopped, a simple and small reciprocating pump is operated to eject the liquid material sucked from the outward path through the return path, so that any part of the discharge passage is discharged. Alternatively, even if fillers are deposited on the rotary valve body, the deposited fillers can be sufficiently dispersed by the jet of the liquid material, so that the discharge passage is more effectively prevented from being blocked. Will be. In this apparatus, when the size of the through passage of the rotary valve body is made substantially equal to the inner diameter of the discharge passage, when the valve is opened, accumulation of filler on the rotary valve body is prevented, and the discharge passage is prevented. Can be more sufficiently removed. Here, when the shape of the rotary valve body is substantially spherical, the liquid sealing performance by the valve seat can be improved as compared with the case where the shape is a columnar shape, a truncated cone shape, or the like. Further, when the reciprocating pump is a plunger pump, a piston pump, or a membrane pump, the structure of the reciprocating pump, and further, the entire apparatus can be simplified, and the apparatus can be further downsized.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. In the drawing, reference numeral 1 denotes a container having a relatively large diameter for storing a filler-containing liquid material, 2 denotes a filler-containing liquid material stored therein, and 2a denotes a filler in the liquid material. Here, a discharge passage 4 having a relatively small and substantially uniform inner diameter is continuously provided at the lower end of the storage container 1 to the discharge port 3, while a stirring blade 5 of a stirring device is provided in the storage container. If it can be arranged, and the airtight lid 6
The introduction of pressurized air is made possible through. The valve 7 is disposed at a position near the discharge port of the discharge passage 4. In this valve 7, a substantially spherical rotary valve body 9 provided with a through passage 8 in the center portion is disposed in a housing 10 also serving as a valve seat, and the through passage 8 is preferably provided with a discharge passage. It has a diameter substantially equal to the inside diameter of the passage 4. By the way, the rotary valve body 9 of the valve 7 configured as described above is rotated by 90 ° by a rotation driving means 11, for example, a motor connected thereto, to open and close the valve 7 alternately. The opening / closing operation of the valve 7 is performed by rotating the rotary valve body 9 by 90 ° in a certain direction, by rotating the rotary valve body 9 by 90 ° in either direction, and then by rotating it by 90 ° in the opposite direction. It can also be done by doing.

Here, a membrane pump 12 as an example of a reciprocating pump is provided in the discharge passage 4 at a position upstream of the valve 7, just above the valve 7 in the figure, with an outward passage 13 extending in parallel with each other.
And through the return passage 14. Here, the illustrated membrane pump 12 includes a double-acting cylinder 15 and a piston side chamber 15a thereof.
And a rod-side chamber 15b, which is connected to an electromagnetic switching valve 16 for alternately supplying and discharging pressurized fluid, a piston rod 15c of a double-acting cylinder 15, and a liquid-tight connection to the inner wall surface of a housing 17. A diaphragm or other flexible membrane 18,
A liquid chamber 19 defined by the flexible membrane 18 and the housing 17
It consists of. Further, the outward passage 13 shown in the drawing has a check valve 20 that allows only the flow of the liquid material 2 from the center passage 4 in the direction of the liquid chamber 19, and the return passage 14 has a direction opposite to that of the liquid material 2. Each has a check valve 21 that allows only the flow to

In such a membrane pump 12, the electromagnetic switching valve 16
When the pressurized fluid is supplied to the rod side chamber 15b of the double acting cylinder 15 under the action of the double acting cylinder 15, the piston rod 15c is displaced to the right in the drawing under the deformation of the flexible membrane 18, thereby increasing the volume of the liquid chamber 19. As the amount increases, the liquid material 2 in the discharge passage is sucked into the liquid chamber through the outward passage 13. On the other hand, when pressurized fluid is supplied to the piston side chamber 15a, the piston rod
15c, the volume of the liquid chamber 19 is reduced, so that a considerable amount of the liquid material 2 in the liquid chamber is returned to the return passage 14.
Through the discharge passage 4. here,
According to this example, since the return passage 14 is located very close to the valve 7, the jet ejected from the return passage 14 causes the sedimentation and deposition of the filler in the discharge passage and on the rotary valve body to sufficiently reduce the liquid material. This effectively prevents the filler from being deposited on the rotary valve body and effectively disperses the filler with the ejection energy of the liquid material.

The operation of the device configured as described above will be described below. In discharging a fixed amount of the liquid material 2 containing the filler from the discharge port 3, pressurized air is supplied into the storage container 1 through the airtight lid 6, and the liquid material 2 is stirred and flowed under the operation of the stirring blade 5. The rotation valve 9 is rotated by the rotation driving means 11 while preventing the filler 2a from settling, so that the through passage 8 thereof is accurately aligned with the discharge passage 4 as shown in FIG. 2 (a). As a result, the valve 7 is completely opened. Thus, the discharge of the liquid material 2 from the discharge port 3 is started. In this case, the membrane pump 12
Is inactive. Such discharge from the discharge port 3 is preferably continued for a certain period of time determined in relation to the pressure of the pressurized air, and at the same time, the rotary valve body 9 is illustrated in FIG. 2 (b). And rotate it to
As shown in FIG. 2 (c), the valve 7 is completely closed by rotating 90 degrees from the open position. In such a constant discharge of the liquid material 2, in the apparatus of this example, the discharge passage 4 does not have a reduced diameter stepped portion in any part of the discharge passage 4 including the through passage 8 of the rotary valve body 9. The filler 2a does not settle at the specific location of No. 4 and does not accumulate. In addition, during the closing operation of the valve 7, the filler 2a is not forcibly pushed into between the rotary valve body 9 and the housing 10 also serving as a valve seat. It does not drop.

By the way, immediately after the completion of one fixed-quantity discharge as described above, the membrane pump 12 is operated immediately so that the above-described suction and ejection of the liquid material 2 in the discharge passage is performed in the next fixed-rate discharge. Until this is performed, the liquid material 2 in the discharge passage, which cannot receive the action of the stirring blade 5 sufficiently, is subjected to unsteady flow stirring, whereby the rotary valve of the filler 2a is rotated. It sufficiently prevents sedimentation and deposition on the body, and provides effective dispersion of the settled filler 2a even if it is present on the rotary valve body.

Thus, according to this apparatus, whether the liquid material 2 is being discharged at a constant rate or while the discharge is stopped,
The sedimentation and accumulation of the filler 2a in the discharge passage 4 including the valve 7 is effectively prevented. Therefore, the possibility that the discharge passage 4 is blocked by the filler 2a is almost completely eliminated, and the filler-containing liquid material 2 is removed. In this way, it is possible to always perform accurate constant-quantity discharge.

[0016]

As is apparent from the above description, according to the present invention, the inner diameter of the discharge passage is made substantially uniform, so that the filler to the step of reducing the diameter during the discharge and during the pause of the discharge can be obtained. In addition, during the suspension of the discharge, the reciprocating pump causes an unsteady stirring flow of the liquid material containing the filler into the discharge passage, thereby accumulating the filler on the rotary valve body. Can be effectively prevented, so that the discharge passage can be almost completely prevented from being blocked due to the accumulation of the filler, and the constant quantitative discharge can always be performed. In addition, since the rotary valve element does not push the filler between the rotary valve element and the valve seat during the closing operation thereof, the durability of the valve can be greatly improved. Moreover, since no flexible tubes, hoses and the like are required here, there is no danger of wear or the like. Further, in this device, the structure of the device can be simplified and the entire device can be sufficiently reduced in size by stirring and flowing the liquid material with the reciprocating pump. By the way, in this device, when the size of the through passage of the rotary valve body is substantially equal to the inner diameter of the discharge passage,
In particular, it is possible to prevent the filler from being deposited on the valve body during the discharge process, and to more sufficiently eliminate the possibility of blocking the discharge passage. Also, here, when the shape of the rotary valve body is substantially spherical, liquid sealing by the valve seat can be facilitated, and when the reciprocating pump is a plunger pump, a piston pump or a membrane pump, The structure of the device can be made particularly simple, and the whole device can be made particularly compact.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the operation of the rotary valve body.

FIG. 3 is a longitudinal sectional view showing a conventional example.

FIG. 4 is a longitudinal sectional view showing another conventional example.

FIG. 5 is a cross-sectional view showing a state in which a filler is deposited around a needle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage container 2 Filler-containing liquid material 2a Filler 3 Discharge port 4 Discharge passage 5 Stirring blade 6 Airtight lid 7 Valve 8 Through passage 9 Rotary valve body 10 Housing 11 Rotation drive means 12 Membrane pump 13 Outgoing passage 14 Return passage 15 Double acting Cylinder 15a Piston side chamber 15b Rod side chamber 15c Piston rod 16 Solenoid switching valve 17 Housing 18 Flexible membrane 19 Liquid chamber 20, 21 Check valve

Claims (4)

(57) [Claims] 1. A discharge passage having a substantially uniform inner diameter up to a discharge port is provided at a lower end of a container for a liquid material containing a filler, and a through passage is provided at a position near the discharge port in the discharge passage. A discharge device for a filler-containing liquid material, comprising a valve having a rotary valve body, and a reciprocating pump connected to the discharge passage upstream of the valve. 2. The discharge device for a liquid material containing a filler according to claim 1, wherein the diameter of the through passage of the rotary valve body is substantially equal to the inner diameter of the discharge passage. 3. The apparatus for discharging a filler-containing liquid material according to claim 1, wherein the rotary valve body has a substantially spherical shape. 4. The reciprocating pump comprises a plunger pump,
A piston pump or a membrane pump.
3. The discharging device for a liquid material containing a filler according to any one of 3.