JP2000145649A - Fluid ejection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a seal constitution part and improve the operability by forming a jet unit of an elastic member having one end opened and a bottomed vessel shape and a sealing means providing a flow passage communicating a jet fluid storage chamber, a suction valve, and a discharge valve together and locked with an opening part of the elastic member. SOLUTION: A pressure converter 1 is provided with a rubber tube of a cylindrical bottom and a drive fluid storage chamber 3, and the top part is sealed by a sealing member 7. The jet unit 20 has a silicone tube 21 having a bottomed cylindrical shape as an elastic member, a cap adapter 22, or an end member provided as sealing means constituting a suction and a discharge mechanism parts, an outer collar 23, a manifold 24, a suction valve 27, and a discharge valve 28 in the top end and a jet fluid storage chamber 25 is formed in a space closed thereby. The silicone tube 21 constitutes an outer wall part of the jet fluid storage chamber 25 by its side parts and the top of the opened silicone tube 21 is sandwiched and held by the cap adapter 22 and the outer collar 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejecting apparatus for ejecting a fluid by transmitting an oscillating pressure from the outside to an ejection fluid filled in a storage chamber, and is particularly used for a pressure converter. The present invention relates to the improvement of a jet system unit.

[0002]

2. Description of the Related Art Conventionally, various types of fluid ejecting devices have been used. However, an oscillating pressure that alternately pressurizes and depressurizes alternately is transmitted from outside to a fluid filled in a storage chamber to store the fluid. 2. Description of the Related Art An ejection device capable of continuously sucking a fluid into a chamber and discharging the fluid from a storage chamber is known.

A typical fluid ejection device having a pressure converter section for transmitting pressure to a fluid for ejection is provided with a diaphragm as a membrane plate for a diaphragm inside a housing and two storages inside the housing. A chamber is formed, one of the storage chambers is provided with an inflow port and a discharge port, and the inside thereof is filled with a fluid for ejection, and the other storage chamber is filled with a driving fluid, and a vibration pressure is applied thereto, thereby forming a diaphragm. The diaphragm pump performs suction and discharge of the ejection fluid by transmitting the ejection fluid to a storage chamber of the ejection fluid via the ejection pump.

In a conventional diaphragm pump, an ejection system unit constituting a storage chamber for filling ejection fluid in a housing is sealed, and when used as a medical pump or a chemical pump, washing and sterilization are performed. As a result, frequent disassembly / assembly processing operations took a lot of trouble and time.

Accordingly, the present applicant has disclosed in Japanese Patent Application No. 8-137438 a fluid jetting device for performing a processing operation efficiently. This fluid ejection device has a wall that comes in contact with the ejected fluid as an ejection system unit composed of a substantially cylindrical elastic member, and can be easily attached to and detached from the pressure converter to improve disassembly and assembly processing. there were.

[0006]

In the conventional ejection system unit, the suction port side and the discharge port side of the ejection fluid are separately provided at both ends of the substantially cylindrical elastic member, and the suction valve mechanism section and the discharge valve are provided. Each mechanism is provided.

[0007] The suction valve mechanism is connected to an external jetting fluid supply source via a pipe such as a hose, and has a one-way valve (or a check valve) that opens only when the jetting fluid flows in. . For this reason, when the ejection system unit is depressurized,
When the one-way valve is opened and fluid flows into the inside from the ejection fluid supply source, on the contrary, when the ejection system unit is pressurized, the one-way valve is closed to suppress the outflow of liquid from the inside. .

The discharge valve mechanism section is connected to an injection section such as an external nozzle by a pipe such as a hose, and internally has a one-way valve (or a check valve) which is opened only when the ejection fluid is ejected from the ejection system unit. ). For this reason, when the ejection system unit is pressurized, this one valve is opened and the fluid is discharged from the inside to the ejection unit. Conversely, when the ejection system unit is depressurized, this one valve closes. Thus, the inflow (or backflow) of the liquid into the inside is suppressed.

The suction valve mechanism and the discharge valve mechanism are locked at both ends of a substantially cylindrical elastic member via end members provided with a suction port or a discharge port. The structure was such that there was no seal.

That is, since there are two seal portions, there are a plurality of locations that may cause liquid leakage, and the number of parts is large, the number of assembly steps is large, and the assembly procedure is complicated.

Further, since the valve mechanisms are provided at both ends of the elastic member, it becomes an obstacle when the valve mechanisms pass through the cylindrical inner wall of the driving fluid storage chamber of the pressure converter when the ejection system unit is attached and detached. In some cases, the attachment / detachment work was not performed smoothly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has a fluid ejecting apparatus in which an ejecting system unit can be detachably mounted so that the liquid contacting portion of the ejected fluid can be easily replaced. It is an object of the present invention to provide a fluid ejecting apparatus which realizes simplification of a seal constituent part and improvement of operability.

[0013]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a fluid ejection device for ejecting fluid and a driving fluid storage chamber for storing driving fluid. A pressure converter section disposed adjacent to the chamber, and pressurizing means for applying an oscillating pressure to the driving fluid, wherein the oscillating pressure is applied to an adjacent portion between the ejection fluid storage chamber and the driving fluid storage chamber. In the fluid ejection device, the ejection fluid unit is provided with the ejection fluid storage chamber, and the ejection fluid is sucked into the ejection fluid storage chamber and the ejection fluid is ejected from the ejection fluid storage chamber. , Disposed detachably from the pressure converter section,
A bottomed container-shaped elastic member that constitutes an outer wall portion of the jetted fluid storage chamber and has an open end, and a flow path that communicates the jetted fluid storage chamber with a suction valve and a discharge valve. And a sealing means locked to the part.

Further, in the fluid jetting device according to the present invention, a strut member disposed at a symmetric axis position of the bottomed container-shaped elastic member is provided inside the jetting system unit. The fluid ejection device according to claim 1, wherein:

[0015]

In the present invention, a bottomed container-type bag-shaped elastic member which is independent of the main body in the pressure converter section is employed, and further, an end provided with a suction valve and a discharge valve in its opening as a sealing means. Since the member is attached, the seal portion of the elastic member is provided at one place, and the cause of liquid leakage can be reduced while using the detachable structure, and the number of parts can be reduced.

[0016] For this reason, since the jetting system unit after use can be disposable as it is, it meets the demand for disposables due to safety problems such as sterilization in the medical field, and is excellent in terms of safety. As a result, costs can be reduced.

Further, since the lower part of the ejection system unit is formed only of an elastic member having no obstacle, attachment and detachment at the pressure converter can be smoothly performed. In addition, since the suction port arranged in the lower part in the conventional device is arranged in the upper part, the suction port does not need to pass through the inside of the pressure converter, so that the suction port is always kept hygienic.

Next, by employing the support member according to the second aspect of the invention, the rigidity of the bag-like, substantially cylindrical elastic member constituting the side surface portion and the semicircular bottom surface portion of the ejection system unit can be maintained. Became.

The strut member is disposed at a position of a symmetric axis of the elastic member so as to form a space as a jet fluid storage chamber.
The lower portion has a shape conforming to the shape of the semicircular bottom surface of the elastic member, and has rigidity against bending in the axial direction of the elastic member while maintaining the shape of the bottomed cylindrical container. Therefore, when handling the ejection system unit alone at the time of attachment / detachment,
The entire elastic member does not bend.

Further, since this support member is disposed at the symmetrical axis position of the bottomed cylindrical elastic member, it is possible to prevent the elastic member itself from being distorted and changed, and to prevent the internal pressure distribution from becoming uneven. Preventing.

In addition, the degree of elastic deformation of the elastic member due to transmission of pressure from the outside of the unit can be limited to a range in which the elastic member exerts an elastic recovery force to return to the original state. This can prevent damage to the device.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Here, an example in which the pressure converter and the ejection unit according to the invention of the present application are applied to a water jet knife will be described.

FIG. 1 is a schematic sectional view of a pressure converter according to an embodiment of the present invention. In FIG. 1, a pressure converter 1 is a member constituting a part of a water jet knife as a fluid ejection device, and shows a state in which an ejection system unit 20 is incorporated in the pressure converter 1.

The pressure converter 1 has a driving fluid storage chamber 3 formed by a space between a bottomed cylindrical rubber tube 4 which is a bag-shaped elastic member and an outer shell container 2, and a seal member 7. Seals the upper part. Furthermore, the outer shell container 2
Is provided with a split presser plate 5 constituting a holding means of the ejection system unit 20.

The ejection system unit 20 includes a bottomed cylindrical silicon tube 21 as an elastic member, a cap adapter 22 as an end member provided at the upper end thereof as a sealing means constituting a suction and discharge mechanism, and an external member. Color 2
3 and a manifold 24, and furthermore, a suction valve 27 and a discharge valve 28, and an ejection fluid storage chamber 25 is formed in a closed space by these.

The silicon tube 21 has a bag shape having a semicircular bottom surface, and the side surface thereof constitutes the outer wall of the ejection fluid storage chamber 25. The upper part of the open silicon tube 21 is held between the cap adapter 22 and the external collar 23. In this holding portion, the opening distal end portion of the silicon tube 21 is fitted into a groove formed continuously with the lower outer peripheral portion of the cap adapter 22, and a peripheral protrusion is formed on the outer peripheral portion of the cap adapter 22 further below the groove portion. When the fluid is sucked into and ejected from the ejected fluid storage chamber 25, the structure is made more tightly closed and held.

Further, inside the ejection fluid storage chamber 25,
A column member 26 having a semicircular lower portion 26a conforming to the shape of the bottom portion of the silicon tube 21 and a column portion 26b
Are provided at the symmetric axis position of the silicon tube 21. A pillar communication hole 29 is provided at an upper portion of the pillar portion 26b so as to communicate the ejection fluid storage chamber 25 with the suction port and the discharge port via a flow path formed inside the cap adapter 22. That is, the fluid is sucked into the ejected fluid storage chamber 25 or discharged from the ejected fluid storage chamber 25 through the column communication hole 29.

A manifold 24 is connected to the upper part of the cap adapter 22. A suction side communication hole 3 communicating with a flow path inside the cap adapter 22 is provided inside the manifold 24.
1a and a discharge side communication hole 31b are provided. A suction valve 27 having a check ball or a discharge valve 28 also having another check ball is disposed in each communication hole, and is connected to an external ejection fluid supply source or an ejection section via a hose. Is done.

Since the outer casing 2 and the rubber tube 4 of the pressure converter 1 are arranged concentrically, the driving fluid storage chamber 3 has a hollow cylindrical shape, and the ejection system unit 20
The pressure converter 1 is provided inside the main body of the pressure converter 1 so as to be isolated from the ejection fluid storage chamber 25. The inner wall (side wall) of the hollow portion is formed of a rubber tube 4 which is an elastic member, and serves as a pressure transmitting portion of the driving fluid storage chamber 3.

A seal member 7 is provided above the driving fluid storage chamber 3.
Is arranged so that the opening of the rubber tube 4 is pressed against the outer shell container 2 from the inner side and the upper side, and the space between the rubber tube 4 and the outer shell container 2 is closed.
Is sealed.

The hollow portion of the seal member 7 is provided with an insertion hole substantially equal to the outer shape of the outer collar 23 of the ejection system unit 20, and this insertion hole is used for inserting and removing the ejection system unit 20 from the main body. It constitutes an insertion part.

The split presser plate 5 has a general shape in which a so-called donut-shaped annular member is split into two, and is attached to the outer shell container 2 with bolts 9. The split presser plate 5 is configured to be rotatable in the axial direction about a bolt 9, and the ejection system unit 20 inserted therein in a closed state.
Is fixed and held, and the ejection system unit 20 is opened.
Can be taken out of the pressure converter 1 or inserted into the pressure converter 1.

In this embodiment, when the ejection system unit 20 is inserted, the ejection system unit 20 is positioned concentrically in a hollow portion provided at the axial center portion of the pressure converter 1, and the ejection fluid storage chamber is provided. The silicone tube 21 forming the outer wall of the 25 and the rubber tube 4 forming the inner wall of the driving fluid storage chamber 3 face each other. That is, the driving fluid storage chamber 3 of the pressure converter 1 and the ejection fluid storage chamber 25 of the ejection system unit 20 are arranged adjacent to each other via the rubber tube 4 and the silicon tube 21 that constitute the respective side walls. I have.

As shown in FIG. 1, when the apparatus is not operated, a slight gap is formed between the rubber tube 4 and the silicon tube 21. This prevents the elastic members from contacting each other and increasing the resistance when attaching and detaching the ejection system unit 21 to and from the pressure converter 1, and prevents the attaching / detaching operation from becoming complicated.

When actually used as a fluid jetting device, the driving fluid storage chamber 3 is filled with driving fluid and pressurized to expand the rubber tube 4 inward, and the rubber tube 4 and the silicon tube 21 By contacting with each other, the partition walls overlap each other to form an integrated contact portion, and pressure can be transmitted through the contact portion.

Next, a water jet knife as a fluid ejection device in this embodiment will be described with reference to FIG.

A pressurizing device 201 is connected to a communication hole 2 a provided in the outer shell container 2 of the pressure converter 1.
Hydraulic oil as a driving fluid is supplied into the driving fluid storage chamber 3, and an oscillating pressure that alternates between pressurization and depressurization is transmitted to the hydraulic oil filled in the driving fluid storage chamber 3. ing.

The pressurizing device 201 is, for example, a piston means 20 which repeats forward and backward continuously by rotation of a motor.
3 and the like are provided to generate the vibration pressure as described above. Further, an appropriate amount of hydraulic oil is supplied into the driving fluid storage chamber 3 by the volume variable
Is filled with hydraulic oil, and the gap between the rubber tube 4 serving as a partition and the silicon tube 21 is adjusted and brought into close contact with each other, so that the vibration pressure from the pressurizing device 201 can be transmitted.

The infusion system unit 20 is connected to a suction port of a saline infusion pack 210 serving as a supply source of ejection fluid via an infusion tube 212, and a discharge port is provided with a handpiece 200 serving as an injection unit at the ejection port. Connected via 214.

In operation, the vibration pressure applied to the driving fluid storage chamber 3 is applied to the rubber tube 4 and the silicon tube 21.
The pressure contact portion is used as a pressure transmitting portion and transmitted to the ejection fluid storage chamber 25 to continuously inhale and discharge the physiological saline. That is, at the time of pressurization, the silicon tube 21 is pressed toward the axis (in the radial direction) and deforms (shrinks) while the rubber tube 4 is in close contact with the silicon tube 21, and the inside of the silicon tube 21 of the ejection system unit 20 is pressed. Physiological saline is discharged through the discharge valve 28 when pressed, and the handpiece 20 is discharged.
Injected from zero. Conversely, when the pressure is reduced, the silicon tube 21 expands away from the axis, and the ejected fluid storage chamber 25
A negative pressure is generated in the inside, and physiological saline is stored in the silicon tube 21 through the suction valve 27.

By rapidly repeating one cycle of the pressurization and depressurization, a jet fluid having a substantially continuous and constant jet pressure can be obtained, and can be used as a fluid jet device (pump) for a water jet knife.

In the above embodiment, the present invention is applied to a jet knife using physiological saline as an example. However, the present invention is not limited to this. The present invention can also be applied to a pressurized jetting device using other chemicals.

[0043]

As described above, according to the present invention,
It is possible to improve the quality by reducing the cause of liquid leakage while maintaining easy workability and safety such as cleaning, sterilization, repair, etc. by attaching and detaching and replacing only the ejection system unit, which is the conventional advantage, and This also has the effect of reducing product costs by reducing the number of parts.

Further, since the suction and discharge mechanisms are centrally located at the upper part of the ejection system unit, the lower part of the ejection system unit is formed only of an elastic member without obstacles. The attachment / detachment of the spout system unit can now be done smoothly. In addition, since the suction port does not need to pass through the inside of the pressure converter, the suction port can be always kept hygienic.

Further, since the column members are arranged, the rigidity of the elastic members forming the side and bottom portions of the ejection system unit in a substantially cylindrical bag shape can be maintained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of the configuration of a pressure converter and an ejection system unit according to the present invention.

FIG. 2 is an application example of a pressure converter and an ejection system unit according to the present invention.

[Explanation of symbols]

 1: pressure converter 2: outer shell container 3: drive fluid storage chamber 4: rubber tube (elastic member) 20: ejection unit 21: silicon tube (elastic member) 22: cap adapter (end member) 25: ejection fluid storage chamber 26: Support column 27: Suction valve 28: Discharge valve

Claims (2)

[Claims] 1. A pressure converter section provided with an ejection fluid storage chamber for storing an ejection fluid and a drive fluid storage chamber for storing a drive fluid adjacent to each other, and pressurization for applying an oscillating pressure to the drive fluid. Means, the vibration pressure is transmitted through an adjacent portion between the ejection fluid storage chamber and the driving fluid storage chamber, so that the ejection fluid is sucked into the ejection fluid storage chamber and the ejection fluid is discharged. In the fluid ejection device for discharging from the ejection fluid storage chamber, an ejection system unit including the ejection fluid storage chamber is disposed detachably from the pressure converter unit, and constitutes an outer wall of the ejection fluid storage chamber. A bottomed container-shaped elastic member having an opening, and sealing means provided with a flow path communicating the ejection fluid storage chamber with a suction valve and a discharge valve and locked in an opening of the elastic member. Characterized by Fluid ejection device. 2. The fluid ejection device according to claim 1, further comprising a support member disposed at a symmetric axis position of the bottomed container-shaped elastic member inside the ejection system unit.