JP2000345957A - Piston pump with valve releasing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piston pump having the inside capable of being sufficiently washed without being disassembled. SOLUTION: In this piston pump, a reciprocating piston 30 is provided in a vertically erected cylinder 10, a check valve 50 for preventing back flow of sucked materials sucked from a suction port 23 provided on the lower part of a cylinder 10 is provided, and the sucked materials are sucked and discharged by the reciprocating operation of the piston 30. A releasing mechanism 70 is provided, for dropping and discharging the sucked materials remaining in the cylinder 10 by releasing the check valve 50 after stopping the pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piston pump having a valve opening mechanism, and more particularly to a piston pump having a valve opening mechanism capable of dropping and sucking a sucked substance sucked and retained in the pump.

[0002]

2. Description of the Related Art Raw materials used in the production of foods and food raw materials include liquid raw materials such as fruit juice, milk and essence, and viscous fluid raw materials such as ice cream mixes and honey. Fluid raw materials are used. In a food processing plant, a piston pump is used to transfer these fluid food materials to a mixing tank or to send them to the next process.

[0003] Piston pumps used in the production and processing of foods need to be thoroughly washed every time the work is completed.
Insufficient cleaning of the piston pump may cause the raw material adhering to the piston pump to be mixed into food to be manufactured next, and the raw material adhering to the piston pump may be deteriorated and decomposed. This is because there is a possibility that food manufactured using the piston pump may be contaminated. Therefore, since it is necessary to sufficiently clean the inside of the piston pump, the piston pump is conventionally disassembled and cleaned.

[0004] Since the disassembly and cleaning work of the piston pump must be performed every time the work is completed, the work is usually carried out every day. However, the labor required for the disassembly and cleaning work of the piston pump is large, and for that purpose, time is required. Was.
For this reason, piston pumps have been improved to reduce the labor of such purification work.However, conventional improvements have reduced the number of parts of the piston pump and made it easier to disassemble and assemble. Most were improved.

[0005]

However, although the disassembly and assembly can be easily performed, as described above, the cleaning of the piston pump must be performed every time the work is completed, and the cleaning and assembling work is still reduced. It is hard to say that.

Accordingly, an object of the present invention is to provide a piston pump capable of sufficiently cleaning the inside without disassembling the piston pump.

[0007]

According to the first aspect of the present invention, a reciprocating piston is provided inside a vertically erected cylinder, and a piston is provided below the cylinder. A check valve for preventing backflow of the inhaled matter sucked from the provided suction port is provided therein, and in a piston pump for sucking and discharging the inhaled matter by reciprocating motion of the piston, the pump is stopped and then stopped. An opening mechanism for dropping and discharging the inhaled matter retained in the cylinder by opening the valve is provided.

According to a second aspect of the present invention, there is provided a piston pump with a valve opening mechanism according to the first aspect, wherein air is supplied to a side surface of the cylinder by an air supply mechanism into the cylinder. An air outlet for exhausting air supplied from the air inlet to the outside and a discharge port for discharging inhaled matter sucked into the cylinder are provided, and the piston is provided at the upper end of the plunger by an air supply mechanism. An air switching member for switching the flow of the supplied air is attached, and a control valve for controlling the pressure in the cylinder is attached at the lower end, and the opening mechanism is provided at the bottom dead center of the piston. At this position, the check valve and the control valve are simultaneously opened to drop and discharge the inhaled matter retained in the cylinder.

According to a third aspect of the present invention, there is provided a piston pump having a valve opening mechanism according to the first or second aspect, wherein an upper intake port is provided on an upper surface of the cylinder, and the upper intake port is provided on the upper surface of the cylinder. The air pipe connected to the intake port is provided with a check valve that is opened only when the operation of the pump is stopped and air is supplied from the upper intake port, and is closed when the pump is operating, and the air supply mechanism supplies air. , Whereby the piston can be moved to the bottom dead center position.

According to a fourth aspect of the present invention, there is provided a piston pump with a valve opening mechanism according to any one of the first to third aspects. Thus, when the check valve is opened, an opening member for opening the control valve in conjunction with the opening of the check valve is built in.

According to a fifth aspect of the present invention, there is provided a piston pump with a valve opening mechanism according to any one of the first to fourth aspects, wherein the opening mechanism is provided near the check valve. An open pin is attached to the link of the rotary actuator arranged on the side of the cylinder, the link is operated by air switching, the open pin protrudes in the horizontal direction at the time of opening to open the check valve, and at the time of operation, It is characterized in that it is configured to retract the release pin.

According to a sixth aspect of the present invention, there is provided a piston pump with a valve opening mechanism according to any one of the first to fifth aspects. An operation mode in which air is supplied to operate the pump, a discharge mode in which air is supplied from the upper intake port to push down the piston and move to a bottom dead center position,
A switching valve having a stop mode for stopping the supply of air and stopping the movement of the piston is provided.In the operation mode, the release pin of the release mechanism attached to the link of the rotary actuator is pulled in, and in the discharge mode, An air pipe is provided such that the release pin projects to open the check valve.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A piston pump with a valve opening mechanism according to the present invention will be described in detail based on a preferred embodiment shown in the drawings. FIG. 1 is a partial cross-sectional view of a piston pump with a valve opening mechanism according to the present invention.

First, the configuration of the piston pump with a valve opening mechanism in the present embodiment will be described. First, a piston pump 1 with a valve opening mechanism is roughly described as a cylinder 10
, A piston 30, a check valve 50, and a rotary actuator 70.

The cylinder 10 is formed by clamping cylinders 10a and 10b each having a space formed therein by a ferrule 12a.
It is formed by connecting with a 1a stop. Silicone packing is provided at the connecting portion to prevent leakage. Cylinder 1
An upper intake port 19 is bored in the top surface of the cylinder 10a that forms the upper side of the cylinder 0, and a switching spring 20 is provided inside the top wall of the cylinder 10a so as to protrude downward. An intake port 15 for introducing air into the cylinder 10 and an exhaust port 17 for exhausting the introduced air to the outside are formed in the side surface of the cylinder 10a. An air pipe for supplying air from an air supply mechanism (not shown) is connected to the intake port 15 by connecting means such as a coupling. The air pipe connected to the upper intake port 19 is opened only when the operation of the pump is stopped and air is supplied from the upper intake port 19, and is closed when the pump is operated.
a is provided.

Cylinder 1 between intake port 15 and exhaust port 17
A partition plate 10c is provided in the inside 0, and a partition plate 10d is provided between the exhaust port 17 and the discharge port 21. Partition plate 1
0c and 10d, the inside of the cylinder 10 has an air chamber A formed by the top surface of the cylinder 10a and the air switching member 33;
The air chamber B is partitioned by the air switching member 33 and the partition plate 10c, and the air chamber C is partitioned by the partition plate 10c and the partition plate 10d. The intake port 15 is located on the air chamber B side, and the exhaust port 17 is located on the air chamber C side.

On the other hand, a lower end of the cylinder 10b is connected to a suction port 23 for sucking inhaled matter such as food material to be transferred by a pump by a clamp 11b with a ferrule 12b, and a cylinder is connected to a side surface of the cylinder 10b. An ejection port 21 for ejecting the suctioned object is formed in the inside of the apparatus 10. In addition, since components such as the cylinder 10 are washed with water or chemicals, it is preferable to use stainless steel, which is a material excellent in corrosion and durability.

An air switching member 33 for switching the flow of air supplied by an air supply mechanism is attached to the upper end of a plunger 31 having a vertically long cylindrical shape having a hollow portion formed therein. A control valve 35 for controlling the pressure in the cylinder is attached to the lower end. At the upper end of the plunger 31, a first air vent 37 for introducing air in the air chamber A formed in the cylinder 10 by the air switching member 33 into the plunger 31.
In the plunger 31, a second air outlet 37b for discharging air introduced into the interior of the plunger 31 from the first air outlet 37a is formed in a side portion substantially at the center in the longitudinal direction of the plunger 31. Thus, the air chamber A introduced into the plunger 31
The air inside is configured to be exhausted from the exhaust port 17 through the air chamber C from the second vent port 37b.

As shown in FIG. 2, the air switching member 33 is an air piston 33a which is in close contact with the inner wall of the cylinder 10.
And a switching pin 33b disposed through the air piston 33a, and an upper plate 33c attached to the upper end of the switching pin 33b. Air piston 33
“a” partitions the interior of the cylinder 10 into an air chamber A and an air chamber B. In the air piston 33a, three passages connecting the air chamber A and the air chamber B are formed in three concentric circles, and a washer having a size capable of closing the opening of the passage on the air chamber B side is inserted into each passage. The switching pin 33b is loosely inserted with a slight gap. The upper end of the switching pin 33b is attached to the upper plate 33c. When the washer inserted into the switching pin 33b closes the opening of the passage on the side of the air chamber B, the upper plate 33c is lifted and the first air release is performed. The mouth 37a opens,
On the other hand, the upper plate 33c is pushed down and the first air vent 37a
When the switch is closed, the switching pin 33b also moves downward, so that a gap is formed between the washer of the switching pin 33b and the opening of the passage on the side of the air chamber B, and the gap passes through the gap between the switching pin 33b and the passage. The air in the chamber B moves to the air chamber A.

As shown in FIG. 3, the control valve 35 includes a connecting member 35c attached to the lower end of the plunger 31, a suction piston 35b attached to the connecting member 35c, and a ball 35a. . The suction piston 35b is in close contact with the inner wall of the cylinder 10, and a liquid chamber a is formed between the suction piston 35b and the partition plate 10d. A liquid chamber b is formed below the suction piston 35b. An opening communicating the liquid chamber a and the liquid chamber b is formed in the center of the suction piston 35b.
The opening can be opened and closed by means of. The suction piston 35b moves the cylinder 1 in conjunction with the movement of the piston 30.
The inhaled matter is moved from the liquid chamber a to the liquid chamber b by sliding in the inside of 0.

The check valve 50 is a valve provided to prevent a backflow of the inhaled matter sucked from the suction port 23. When the piston 30 is raised, the opening through which the ball 50a communicates with the suction port 23 is opened. The opening is closed when the piston 30 descends. With this configuration, when the piston 30 descends, the opening connected to the suction port 23 is closed to prevent backflow of the inhaled matter in the liquid chamber a.
When 0 rises, the opening is opened and the suctioned substance is sucked into the liquid chamber a from the suction port 23.

On the side of the cylinder near the check valve 50, a rotary actuator 70 constituting a valve opening mechanism is arranged. That is, the valve opening mechanism is as shown in FIG.
An open pin 73 is attached to a link 71 of a rotary actuator 70 that operates by supplying air, and air supplied from an air supply mechanism is supplied to the link 71 by controlling a valve.
Is operated to cause the release pin 73 to protrude toward the inside of the cylinder 10, or to operate to retract the release pin 73. When the check valve 50 is opened by this configuration, the position of the ball 50a is moved by projecting the release pin in the horizontal direction, and the check valve 50 is opened,
When operating and cleaning the pump, the check valve 50 is operated by pulling in the release pin.

The operation of the rotary actuator 70 is configured to interlock with the operation of the pump.
As shown in FIG. 5, switching between the supply of air to the intake port 15 and the supply of air to the upper intake port 19 is performed by a switching valve 80 provided in the air supply mechanism.
When the air is supplied to the intake port 15 by the pressure of 0, the release pin 73 attached to the link 71 of the rotary actuator 70
The air piping is provided so that when the check valve 50 is operated and air is supplied to the upper intake port 19 by the switching valve 80, the link 71 is protruded to open the check valve 50.

An open member 7 is provided above the ball 50a.
5 is fixed. The opening member 75 is formed by a coil spring, and comes into contact with the ball 35a to open the control valve 35 when the piston 30 descends to the bottom dead center position. That is, when the piston 30 descends to the bottom dead center position, the ball 35a comes into contact with the opening member 75 and is lifted, so that the control valve 35 is opened. The opening member 75 is not limited to the coil spring, but is attached to the ball 35a at the bottom dead center position of the piston 30 and is connected to the control valve 35.
For example, a leaf spring or a pin may be used.

Next, the operation of the piston pump with a valve opening mechanism according to the present invention will be described with reference to FIGS.
First, as shown in FIG. 6A, the switching valve 80 of the air supply mechanism is set to the operation / washing mode, and air is supplied from the intake port 15 into the piston 30. At this time, the air switching member 3
3, the upper plate 33c is located in the upper direction,
a, and the switching pin 33b blocks the passage connecting the air chamber B and the air chamber A, so that the pressure in the air chamber B increases and the air piston 33a rises upward. In the middle of the air pipe connected to the upper intake port 19, a check valve 1
9a is provided and the outflow of air from the upper intake port 19 is prevented, so that the air in the air chamber A flows from the first vent port 37a into the plunger via the first vent port 37a and the second vent is performed by raising the air piston 33a. Flows into the air chamber C from the port 37b,
Then, the air is exhausted from the exhaust port 17.

On the other hand, as shown in FIG. 7A, the air supplied from the air supply mechanism is
0 and supplied to the link 71 and the release pin 73 attached to the link 71.
Is drawn in, the ball 50a comes into close contact with the opening communicating with the suction port 23. When the piston 30 rises, the liquid chamber a and the liquid chamber b are separated from each other in the cylinder 10 by the ball 35a, the liquid chamber a side is in a negative pressure state, and the suctioned material is sucked from the suction port 23 and accumulated in the liquid chamber a. .

Then, as the piston 30 continues to rise,
As shown in FIG. 6B, the upper plate 33c abuts on the switching spring 20 and pushes down the upper plate 33c.
c closes the first vent port 37a. When the upper plate 33c is pushed down, the switching pin 33b also moves downward, so that a gap is created in the opening of the air chamber A side passage closed by the washer of the switching pin 33b, and the air chamber A and the air chamber B are separated. It communicates with the switching pin 33b by a gap in the passage. Therefore, the air supplied from the intake port 15 passes through the air chamber B and passes through the air chamber A.
And the pressure in the air chamber A and the air chamber B increases, so that the piston 30 is pressed down by receiving pressure from the pressure receiving surface 31a of the plunger 31, and the piston 30 descends.
As the piston 30 descends, the suctioned material in the liquid chamber a
5 and flows into the liquid chamber b. Hereinafter, the inhalant is discharged from the discharge port 21 by repeating this operation.

Next, when cleaning the pump, after the cleaning liquid is sucked from the suction port 23 in the operation mode to perform the internal cleaning, the switching valve 80 is set to the stop mode to stop the air supply and the operation of the pump is stopped. I do. When the switching valve 80 is set to the discharge mode, the air supplied from the air supply mechanism flows through the upper intake port 19 into the air chamber A, and pushes down the piston 30. When the piston 30 descends to the bottom dead center position, the release pin 7 attached to the link 71 of the rotary actuator 70 as shown in FIG.
3 protrudes, and the ball 50a is moved to the open position. Further, since the ball 35a comes into contact with the opening member 75, the control valve 35 and the check valve 50 are opened, and the cleaning liquid accumulated in the pump is discharged to the outside. Then, the washing operation is repeated to sufficiently perform the washing. In order to clean the pump, it is very effective to first discharge the inhaled matter retained in the pump in the discharge mode, repeat the cleaning with water several times, and then clean with a disinfectant.
It is to be noted that the pump of this embodiment can of course be disassembled and cleaned.

[0029]

According to the present invention, it is possible to sufficiently clean the inside without disassembling a piston pump used for food production processing. There is no need to assemble, and there is an effect that the work is greatly reduced. Further, the piston pump with a valve opening mechanism according to the present invention can be used not only for manufacturing and processing of foods but also for various kinds of manufacturing of cosmetics, chemicals, and the like, and has an effect of reducing work.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of an embodiment of a piston pump with a valve opening mechanism according to the present invention.

FIG. 2 is a front sectional view of an upper side of the piston pump with a valve opening mechanism shown in FIG. 1;

FIG. 3 is a front sectional view of a control valve and a check valve of the piston pump with a valve opening mechanism shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line AA ′ showing one embodiment of a valve opening mechanism.

FIG. 5 is an explanatory sectional view showing an arrangement state of an air pipe.

FIGS. 6A and 6B are cross-sectional views illustrating the operation of an air switching member.

FIGS. 7A and 7B are cross-sectional views showing the operation of a control valve and a check valve.

[Explanation of symbols]

 A Air chamber A, B Air chamber B, C Air chamber C a Liquid chamber a, b Liquid chamber b 1 Piston pump with valve opening mechanism 10 Cylinder 15 Intake port 17 Exhaust port 19 Upper intake port 19a Check valve 20 Switching spring 21 Discharge Outlet 23 Suction port 30 Piston 31 Plunger 31a Pressure receiving surface 33 Air switching member 33a Air piston 33b Switching pin 33c Upper plate 35 Control valve 35a Ball 35b Suction piston 37a First ventilation port 37b Second ventilation port 50 Check valve 50a Ball 70 rotary actuator 71 link 73 release pin 75 release member 80 switching valve

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) A23G 9/04 F04B 21/00 F A23L 1/076 21/02 B 2/00 A23L 2/00 X

Claims (6)

[Claims] A reciprocating piston is provided inside a vertically erected cylinder, and a check valve for preventing backflow of inhaled matter sucked from a suction port provided at a lower portion of the cylinder is provided. In the piston pump, which is internally provided and inhales and discharges inhaled matter by the reciprocating movement of the piston, after stopping the pump, the check valve is opened to drop and discharge the inhaled matter retained in the cylinder. A piston pump with a valve opening mechanism, characterized by being provided with an opening mechanism for causing the piston pump to open. 2. The piston pump with a valve opening mechanism according to claim 1, wherein a side surface of the cylinder has an intake port for supplying air into the cylinder by an air supply mechanism, and air supplied from the intake port. An exhaust port for exhausting air to the outside and a discharge port for discharging the inhaled matter sucked into the cylinder, wherein the piston switches an air flow supplied by the air supply mechanism to an upper end of a plunger. And a control valve for controlling the pressure in the cylinder is attached to a lower end portion thereof, and the opening mechanism is configured such that the check valve and the check valve at a bottom dead center position of the piston. A piston pump with a valve opening mechanism, wherein the control valve is simultaneously opened to drop and discharge the inhaled matter retained in the cylinder. 3. The piston pump with a valve opening mechanism according to claim 1, wherein an upper intake port is provided on an upper surface of the cylinder, and operation of the pump is stopped in an air pipe connected to the upper intake port. A check valve which is opened only when air is supplied from the upper suction port and is closed when the pump is operated is provided, and the piston can be moved to a bottom dead center position by supplying air by the air supply mechanism. A piston pump with a valve opening mechanism. 4. The piston pump with a valve opening mechanism according to claim 1, wherein the check valve is opened by the opening mechanism at a bottom dead center position of the piston. A piston pump with a valve opening mechanism, wherein an opening member for opening the control valve in conjunction with opening of a check valve is incorporated. 5. The piston pump with a valve opening mechanism according to claim 1, wherein the opening mechanism is opened to a link of a rotary actuator disposed on a side surface of the cylinder near the check valve. A pin is attached, the link is operated by switching air, and when opened, the release pin is projected in the horizontal direction to open the check valve, and during operation, the release pin is retracted. A piston pump with a valve opening mechanism. 6. The piston pump with a valve opening mechanism according to claim 1, wherein the air supply mechanism supplies air from the intake port to operate the pump. A switching valve having a discharge mode in which air is supplied from the upper suction port to push down the piston to move to a bottom dead center position, and a stop mode in which the supply of air is stopped to stop the movement of the piston. And an air pipe that pulls in the release pin of the release mechanism attached to the link of the rotary actuator in the operation mode and projects the release pin in the discharge mode to open the check valve. A piston pump with a valve opening mechanism.