JPS6336067A - Constant-pressure holding device - Google Patents

Abstract

PURPOSE:To keep constant extrusion pressure for a viscous fluid from nozzles at the end of a pipe line by connecting a constant-pressure cylinder to the neighborhood of the pipe line end via an inlet/output pipe and advancing and retreating the piston of the constant-pressure cylinder with the piston of an air cylinder. CONSTITUTION:When a part or all of a plurality of nozzles at the end of a pipe line wherein a viscous fluid is flowing, have been closed, the fluid under feeding loses the destination thereof and causes a pressure over a predetermined level during pumping operation. Then, a fluid remnant to be supplied from the nozzles enters a low pressure cylinder 1 via an outlet pipe 8 and pushes a piston 2 upward. And when the piston 2 has moved to an upper end, a signal from an air sensor 11 detecting the position of the piston 2 opens the air intake valve of an air cylinder 3, thereby causing the downward motion of a piston 4 and pushing out the viscous fluid while a supply pressure being kept constant together with the piston 2. According to the aforesaid constitution, the extrusion capacity of the viscous fluid can be controlled with high precision, regardless of the length of the pipe line and the open/close frequency of the nozzles.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for supplying a viscous liquid at a constant pressure by controlling and maintaining pressure fluctuations caused by opening and closing operations of a plurality of nozzles provided at the end of a pipe line.

Conventionally, when multiple nozzles are used in bottling or canning filling operations for viscous liquids (1,000 to 20,0000 CI), the remaining amount of filling that occurs when all or part of the nozzles are closed is handled by a relief valve installed on the pump outlet side. from the return pipe of 1.
．． It is common to use an accumulator made of rubber or bellows only when the viscosity is low and there is no corrosion resistance to prevent excessive HE force. IJ located away from the nozzle with a tube end IJ
-) When returning the 9 product residual -t, 1 in the pipe between the valves, if the viscosity of the liquid is high, the loss in the pipe will be large, and it will take 1-L time to release from the relief valve, resulting in excessive pressure rise at the nozzle. This results in variations in the amount of filling per unit time, and it takes time and effort to adjust the amount, which has the drawback of disturbing the amount of gravel being filled per unit time.

The present invention has been completed in order to solve the above-mentioned problems in viscous liquid filling devices used in the food, chemical, and paint industries.

Next, the present invention will be explained in detail with reference to the drawings.
When some or all of the plurality of nozzles are closed, while the pump αη is sending liquid, the liquid will have no place to go, and the remaining amount will be filled and the pressure will exceed the specified pressure. Debris 902 in the space inside the constant pressure cylinder (1)
The remaining filling amount of the cylinder 8 flows in through the outlet pipe (0), and as shown in FIG. 3, the piston (2) in the constant pressure cylinder (1) is pushed up and moved backward. When the amount of filling from the nozzle @ section is repeated several times, the piston (2) moves back and up to the stroke end, as shown in Fig. 4, and when the rising end is detected, the piston (2) 4) is pushed out as shown in FIG. 5 while keeping the supply pressure constant with the piston (2) in the constant pressure cylinder (1) while moving forward and downward.

The signal at the rising end simultaneously stops the pump α and the motor a barrel which are in operation.

In the above operations, the supply pressure, exhaust pressure, and air flow of the air cylinder (3) are controlled by the viscosity of the filling liquid, the set pressure, and the piston rod diameter (5). In addition, the stroke of the piston (2) is determined to be at least 5 times the remaining capacity of the catfish.

As described above, according to the present invention, the accuracy of the extrusion amount has been significantly improved regardless of the length of the conduit or the frequency of opening/closing operations of the nozzle. In addition, the constant pressure cylinder part forms a pipe line and is easy to clean, making it easy and reliable to change the color of paint, maintain the sanitary properties of edible liquids, and remove sticking chemicals by passing the cleaning liquid through. Go, Shio. Furthermore, materials can be freely selected regardless of the properties of the liquid. Moreover, the use of air sensors makes it possible to handle potentially flammable chemicals, which is effective in terms of safety and workability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a view of the rising end of the device, and FIG. 5 is a view of the piston moving forward and downward. (1)...Constant pressure cylinder, (2)...Piston, (
3)...Air cylinder, (4)...Piston, (5
)...Piston rod, (6)...Piston rod, (7)...Inlet pipe, (8)...Outlet pipe (9)...Dog, al, aυ...Air sensor ,@
...Nozzle, G3...Pulp 04)...Check valve, q...Air inlet/outlet valve, UL...Control box, qη...Pump, (7)...Motor, 01...Relief valve, 4...
・Pipeline, patent applicant Aoki Kogyo Co., Ltd. (and 1 other person) Figure 1

Claims (1)

[Claims] In a pipe system with multiple nozzles installed at the end of a pipe through which viscous liquid flows, a constant pressure cylinder installed near the end of the pipe is provided with an inlet pipe and an outlet pipe, and the piston rod in the constant pressure cylinder and the air cylinder rod are connected to each other. A constant pressure holding device characterized by having a mechanism that maintains extrusion pressure from a nozzle constant in a constant pressure state by moving an air cylinder forward and backward by connecting it.