JPH09133280A - Fluid connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily realize connection of the leading-out port or the leading-in port of fluid and a feeding part or a feeding source without carrying out any pretreatment in the former, and realize the connection by allowing a difference between opening diameters of the leading-out port or the leading-in port and a core sliding. SOLUTION: A cylindrical connecting member 1 having a communicating flow hole 10 for penetrating an axial part is slidably supported in an axial length direction to a support block 2 connected to a load 6 as the feed part of pressure fluid through a connecting hole 23. When an O-ring 3 as a sealing means is mounted on one end surface of the connecting member projected to the outside of the supporting block, the O-ring 3 abuts on the rim surface 50 of the leading-out port 5 of the pressure fluid by energy of a push spring 4, and pressure fluid led out from the leading-out port 5 in this condition is supplied to the load 6 passing a communicating flow hole 10, a large diameter hole 22 and the connecting hole 23, possession pressure P of the pressure fluid is acted on the end surface of a pressure receiving cylinder 12 fit to the large diameter hole 22, the connecting member is push-pressed so as to reinforce sealing by the O-ring 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid connecting device used for connecting a discharge port for discharging a pressure fluid to a destination or a supply port for introducing a pressure fluid to a supply source.

[0002]

2. Description of the Related Art When various fluid devices such as liquid or gas pumps, hydraulic or pneumatic actuators are used, pressure fluid outlets or inlets provided in the fluid devices (in the case of a pump, a discharge port) are used. The outlet or inlet) should be connected to the desired destination or source.

This connection has been conventionally performed by various means. A flange for connection is provided around the outlet or the inlet, and this pipe is connected to the destination or the supply source. Corresponding flanges provided at the ends of the two, and a flange connection in which these are fastened together with a sealing member interposed between them by a suitable fastening means such as a bolt or a nut, or the outlet or the above. A female thread for connection is formed on the inner surface of the introduction port, and a connecting means such as a screw connection for screwing a male thread formed on the outer periphery of the end portion of the pipe connected to the destination or the source to the female thread is often adopted. ing.

[0004]

However, the connection means as described above is based on the premise of permanent connection under the usage condition of the fluid device, and on the other hand, reliable connection is possible.
There is a problem that it is not suitable for applications that require frequent connection changes.

For example, in a test process such as a characteristic test and an air tightness test performed in the final stage of a manufacturing process of a fluid device, at the start of the test, the outlet and the inlet of the fluid device to be tested are connected to the test fluid. Although it is necessary to promptly connect to the supply source and the destination of the test, after the test is completed, it is necessary to promptly disconnect the connection to prepare for the next test. When the flange connection or the screw connection is adopted, it takes a lot of time to change the connection, so that the test time becomes long and the labor burden on the test operator increases.

A fluid connection device called a coupler or a quick coupler has been conventionally used as a means for promptly changing the connection as described above. This involves attaching a short tubular nipple to the outlet or inlet of the fluid so that the fluid can be conducted, while attaching a tubular socket corresponding to the nipple to the pipe end to be connected in the pipe axial direction. To the nipple by sliding the socket in such a manner that the connecting member for slidably holding the same is attached, and the sockets are slid and fitted to the nipple in a state where these end portions are aligned with each other. Is engaged with an engagement groove formed on the outer periphery of the latter to obtain a connected state.

The connecting member is provided with an operating means for releasing the protrusion of the engaging element. For example, in the state where the protrusion is released by grasping the socket and applying a pushing force to the nipple side. By applying a pulling force in the opposite direction,
The connection described above can be released.

As described above, in the coupler, connection and disconnection can be performed with one touch, but it is necessary to attach the nipple as a dedicated connecting member also to the outlet or inlet of the target fluid. Therefore, when used in the test equipment of the fluid equipment as described above, before starting the test, pretreatment for attaching the nipple to each of the outlet or the inlet of the fluid equipment to be tested is required, and After the test, post-processing for removing the nipples that are no longer needed is required, and there is the inconvenience that a great deal of time and effort is required for these processes for each of the plurality of test devices that are sequentially supplied, It does not contribute to shortening the test time and reducing the labor load on the test operator.

Further, in the test equipment for fluid equipment, there are cases where a plurality of types of test equipment having different outlet or inlet diameters are to be tested. In such a case, the delivery destination or supply Even on the side of communication with the source, it is necessary to prepare a plurality of types of connecting ends to which connecting members corresponding to the respective diameters are attached, and there is a problem that it is not possible to cope with simplification of the test equipment.

The present invention has been made in view of such circumstances, and it is necessary to connect the fluid outlet or inlet with the destination or the source without any pretreatment on the former side. It is an object of the present invention to provide a fluid connection device that can be easily realized without any difficulty, and that can realize the connection by allowing the difference in the diameter of the outlet port or the inlet port within a predetermined range. And

[0011]

A fluid connection device according to the present invention is a fluid connection device used for connecting an outlet or an inlet of a pressure fluid to a destination or a source of the pressure fluid. A cylindrical connecting member having a through hole penetrating the core, and a slidable support member for supporting the connecting member in the axial direction, and communicating with the through hole and connected to the destination or the supply source. And a support block having a connection hole, and the connection member projecting to the outside of the support block is attached to one end surface of the connection member in a manner of edging the opening of the through hole to a surface edging the outlet port or the introduction port. And an annular sealing means that performs a sealing action between both surfaces by pressing, and is formed at the other end of the connecting member having an area larger than the inner area of the sealing means, The holding pressure of the pressure fluid passing therethrough is received to push the connection member. Characterized by comprising a pressure receiving portion for pressing the only orientation.

In the present invention, one end surface of the connecting member protruding from the support block is brought into contact with the surface framing the lead-out port or the introducing port to be connected via the annular sealing means attached to the surface. In the contacted state, the pressure fluid discharged from the outlet or the pressure fluid introduced to the inlet is passed through the through hole penetrating the connecting member, so that the retained pressure of the pressure fluid is It acts on the pressure receiving portion at the other end of the connecting member, and also acts on the inside of the sealing means. As a result, the connecting member is pressed by the force obtained by multiplying the area obtained by subtracting the latter from the former by the holding pressure, and pressing the mounting surface of the sealing means against the lead-out port or the edge face of the lead-in port. Alternatively, the introduction port is connected to the destination or the supply source of the pressure fluid through the flow hole and the connection hole formed in the support block.

Further, the present invention is characterized by further comprising a preloading means for preloading the connecting member in the same direction as the pressing direction by the pressure receiving.

That is, by the operation of the preload means, the connecting member is preloaded in a direction projecting from the support block, and one end surface provided with the annular sealing means is brought into contact with the surface framing the lead-out opening or the inlet to be connected. Then, this state is maintained until the connection state obtained by the subsequent flow of the pressure fluid is realized.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is a vertical cross-sectional view schematically showing the structure of a fluid connection device according to the present invention (hereinafter referred to as the device of the present invention). As shown, the device of the present invention has a through hole 10 penetrating an axis. The connection member 1 having a tubular shape is supported inside the support block 2 so as to be slidable in the axial direction.

The support block 2 is provided with a support hole 21 having a circular cross section having an opening on one surface, and a large diameter hole coaxially connected to the inner side of the support hole 21 and having a circular cross section having a larger diameter than the support hole 21. twenty two
It has. The connecting member 1 has, on one side of a cylindrical sliding cylinder 11 having an outer diameter substantially equal to the inner diameter of the support hole 21, a short pressure receiving cylinder 12 having an outer diameter substantially equal to the inner diameter of the large diameter hole 22. Are coaxially connected, and the pressure receiving cylinder 12 is fitted into the large diameter hole 22 via an O-ring 13 wound around the outer circumference thereof, and the insides of the large diameter hole 22 are sealed with each other. A pair of stopped annular chambers A and B
The sliding cylinder 11 is tightly fitted inside the support hole 21 and the fitting portion guides the sliding in the axial direction.

The tip end surface of the sliding cylinder 11, which is one end surface of the connecting member 1, faces the outside of the support block 2 from the open end of the support hole 21, and the end surface has a flow passage through the axial center. An annular groove is formed so as to frame the opening of the hole 10, and an O-ring 3 as a sealing means is mounted in the annular groove. Further, the end surface of the pressure receiving cylinder 12, which is the other end surface of the connecting member 1, is oriented so as to push out the tip of the sliding cylinder 11 by means of the pressing spring 4 interposed between the end surface of the pressure receiving cylinder 12 and the bottom surface of the large diameter hole 22 facing the connection member 1. Is urged,
Due to this urging, the connecting member 1 is held in a state where the tip of the sliding cylinder 11 is projected to an appropriate length outside the support block 2 as shown in the figure.

Of the annular chambers A and B formed on both sides of the pressure receiving cylinder 12, the annular chamber B on the connecting side of the sliding cylinder 11 slides due to the vent holes 24 formed in the support block 2. The protruding side of the cylinder 11 communicates with the outside air so that the inner pressure of the annular chamber B is always kept at atmospheric pressure.

The other annular chamber A is communicated with the outside of the support block 2 by a connection hole 23 having an opening at the center of the bottom surface of the large diameter hole 22. This connection hole 23
Has a female screw portion 24 having a pipe thread formed on the inner circumference from the outward opening end to a proper length, and the fluid feeding is performed via a pipe (not shown) screwed and fixed to the female screw portion 24. It is designed to be connected to a supplier or supply source.

FIG. 2 is an explanatory view showing a usage state of the apparatus of the present invention constructed as described above. As shown in (a) of the figure, in the device of the present invention, one end surface of the connecting member 1 projecting to one side of the support block 2, that is, the tip end surface of the sliding cylinder 11 is connected to the outlet of the pressure fluid to be connected. 5, the support block 2 and the lead-out port 5 are positioned.
And a fluid device equipped with the O-ring 3 attached to the latter, the edge surface 50 that borders the outlet 5 and the tip surface of the sliding cylinder 11, as shown in (b). And the connection member 1 is pushed into the inside of the support block 2 by an appropriate length against the bias of the push spring 4 elastically contacting the other side while maintaining the contact state. Through the connection hole 23 opened at the bottom of the annular chamber A of
It is used by being connected to a load 6 which is a destination of the pressure fluid.

At this time, the connecting member 1 is in a state of being pressed (preloaded) toward the contact side with the outlet port 5 by the spring force of the pressing spring 4 which is shortened by the above-mentioned pushing, and is slid by this preload. The O-ring 3 mounted on the tip end surface of the cylinder 11 is pressed against the edge surface 50 of the outlet port 5, so that a gentle sealing state is obtained between the both surfaces.

Thus, the pressure fluid discharged from the outlet port 5 has a through hole 10, an annular chamber A and a through hole 10 penetrating the connecting member 1 as shown by an outline arrow in FIG. 2 (c). It passes through the connection hole 23 in this order and is fed to the load 6, which is the destination. At this time, the holding pressure (static pressure) P of the pressure fluid acts on each part of the flow path from the flow hole 10 to the connection hole 23, and the connection member 1
Is the direction of the preload by the push spring 4 due to the received pressure P on the entire surface of the pressure receiving cylinder 12 facing the inside of the annular chamber A, that is,
Is pressed in the same direction as the pressing direction of the O-ring 3,
Further, due to the received pressure P of the holding pressure P inside the O-ring 3 at the tip end surface of the sliding cylinder 11, it is pressed in the direction opposite to the pressing direction.

Here, the pressure receiving cylinder 12 has a larger diameter than the sliding cylinder 11 having the mounting surface of the O-ring 3, and the cross-sectional area (S ₁ ) of the pressure receiving cylinder 12 which is one pressure receiving surface is The pressure is larger than the inner area (S ₂ ) of the O-ring 3 serving as the other pressure receiving surface, and the pressing of the connecting member 1 by the action of the holding pressure P presses the O-ring 3 against the edge surface 50 of the pressure guide port 5, that is, , The pressure fluid generated in the direction of strengthening the sealing at the connection between the outlet 5 and the flow-through hole 10, and the pressure fluid discharged from the outlet 5 flows through the connecting portion whose sealing is strengthened by its own holding pressure P. After that, it is introduced into the through hole 10 without leaking outside, and as described above, the annular chamber A
And is supplied to the load 6 via the connection hole 23.

As described above, in the device of the present invention, the tip of the connecting member 1 projecting from the support block 2 is aligned with the outlet 5 of the pressure fluid to be connected, and the opening of the flow-through hole 10 is edged. After bringing the O-ring 3 into contact with the edge surface 50 of the outlet port 5, the pressure fluid is led out from the outlet port 5, so that the outlet port 5 and the through hole 10 are operated by the action of the holding pressure P of the pressure fluid. Are closely connected to each other, and the outlet 5 can be reliably connected to the load 6 serving as a destination.

This connection is made when the alignment between the outlet port 5 and the flow passage hole 10 is such that there is a misalignment between the two, and
Even if the diameter of the outlet port 5 and the diameter of the flow-through hole 10 are different from each other, it can be realized as long as the contact between the edge surface 50 of the outlet port 5 and the O-ring 3 is possible. Therefore, the outlet 5 and the flow hole
It is possible to make a reliable connection by performing a rough alignment with 10 and pushing the connecting member 1 into the support block 2 against the urging of the pressing spring 4.

Even when the outlet 5 is used as an inlet for introducing the pressure fluid and the load 6 connected to the connection hole 24 is used as the supply source of the pressure fluid, the flow direction of the pressure fluid in the flow path is also changed. Is reversed, that is, the pressure fluid supplied from the supply source flows through the connection hole 24, the annular chamber A, and the flow hole 10 in this order, and the path is introduced to the introduction port. It is possible. However, the fluid flowing in the flow path needs to be a pressure fluid having a holding pressure P equal to or higher than atmospheric pressure.

3 and 4 are longitudinal sectional views showing another embodiment of the device of the present invention. One end surface of the connecting member 1 which is the mounting surface of the O-ring 3 is at the tip end in FIG. The taper surface 14 linearly reduces its diameter toward the tip, and in FIG. 4, the spherical surface 15 projects in a convex shape toward the tip. These embodiments are effective when the corresponding tapered surface 51 or concave spherical surface 52 is provided around the outlet 5 to be connected, as indicated by the chain double-dashed line in each drawing. When the tip of the connecting member 1 is aligned with the outlet port 5, the tapered surface 14 and the tapered surface 51 or the spherical surface 15 and the spherical surface 52 are engaged with each other, and by pressing each other, the outlet port 5 and the through hole 10 are formed. As a result of performing the centering action of aligning the coaxially, there is an effect that the above-mentioned preparation work can be further facilitated.

FIG. 5 is a longitudinal sectional view showing still another embodiment of the device of the present invention. In this embodiment, the through hole 10 penetrating the axial center portion of the connecting member 1 is composed of a small diameter hole 10a on the outer side of the support block 2 and a large diameter hole 10b on the inner side,
A pressing spring 19 in which a closing ball 17 housed in the large diameter hole 10b so as to be movable in the axial direction is interposed between a closing ball 18 engaged near the opening end of the large diameter hole 10b. Due to small hole 1
A non-return valve is configured that urges it toward the connection side with 0a and presses it against the stepped surface between both holes 10a, 10b to allow only the flow from the small hole 10a to the large hole 10b. .

According to this structure, in the use state shown in FIG. 2 (c), the flow of the pressure fluid from the outlet 5 to the flow-through hole 10 is not hindered, and the above-mentioned connection is reliably performed. At the same time, when the end surface of the sliding cylinder 11 is separated from the edge surface 50 of the lead-out port 5 after stopping the flow of the pressure fluid in order to release this connection state, a small diameter hole having an opening outside the support block 2. Since 10a is in a state of being closed by the closing ball 17 biased by the push spring 19, the fluid remaining in the support block 2 and the fluid flowing back from the load 6 are separated from the outlet 5. There is no risk of leaking from the open end of the flow hole 10, and there is an effect that the connection is satisfactorily released.

In the above-mentioned embodiment, the pressing spring 4 as the preload means presses the O-ring 3 lightly against the edge surface 50 of the outlet 5 until the pressure fluid is discharged from the outlet 5. It is necessary to obtain a temporary sealed state at the connecting portion between the outlet 5 and the flow hole 10 at the initial stage of derivation of the pressure fluid, omitting the pressing spring 4 and manually pressing the O-ring 3. Alternatively, other preloading means may be used.

FIGS. 6 and 7 are sectional views showing an application example of the device of the present invention in a gear pump characteristic test facility. As is well known, the gear pump 7 includes a pair of spur gear type rotors 71 and 72, which are separated from each other in the longitudinal direction and rotate about parallel axes, inside a housing 70 having an oval cross section at opposed positions. It is provided with being engaged with each other, and a fluid inlet port (suction port) 73 and a fluid outlet port (discharge port) 74 are provided on both sides of the housing 70 in the short axis direction. It is configured to be confined between the teeth formed on the outer circumference of the rotors 71 and 72 and the inner peripheral surface of the housing 70, and to be led out through the outlet 74 by the rotation of both rotors 71 and 72.

In the characteristic test of the gear pump 7 as described above, the introduction port 73 is used as the tank T as a supply source of the test fluid.
Further, the outlet port 74 is connected to the tank T via a variable throttle serving as a load 6 for giving a fluid resistance,
The rotors 71 and 72 are rotationally driven to suck the test fluid stored in the tank T into the housing 70 through the inlet 73,
In the process of discharging to the outlet port 74 and returning to the tank T via the load 6, the discharge pressure, the flow rate, and the drive load of the rotors 71 and 72 are measured while varying the fluid resistance of the load 6. Be seen.

In the device of the present invention, in the characteristic test conducted as described above, the gear pump 7 and the tank T to be tested are tested.
And the load 6, which is used to promptly change the connection with the load 6. As in FIGS. 1 to 5, the cylindrical connecting member 1 having the through hole 10 penetrating the axis is supported by the support block. 2 is slidably supported in the axial direction in the inside of the two, and is connected to a pair of support legs 80 and 81 by a cross beam 82 at the tip of one support leg 80 of the gate type frame 8. It is installed.

One side of the connecting member 1 projects toward the side opposite to the tip of the other supporting leg 81, and the O-ring 3 is attached to the end surface of the projecting side so as to frame the opening of the through hole 10. ing. A connection hole 83 is provided at the tip of the support leg 81 so as to extend substantially coaxially with the flow-through hole 10. The connection hole 83 is parallel to the mounting surface of the O-ring 3 in a manner to frame the opening of the connection hole 83. The seat surface
84 are formed.

On the other hand, unlike the structure shown in FIGS. 1 to 5, the other side of the connecting member 1 is connected to the output end of the pneumatic cylinder 9 via a connecting rod 16 protruding from the shaft center. , Connection member 1
Is pushed and pulled by the forward / backward movement of the pneumatic cylinder 9 to change the protruding length toward the one side.

The inside of the support block 2 has an opening at the peripheral surface of the large diameter portion 22 while avoiding the penetrating portion of the connecting rod 16, and the support leg 81
Is connected to the outside through a connection hole 23 formed including a part of the above, and is connected to a load 6 serving as a destination through a connection pipe (not shown) screwed into a female screw portion 24 formed in this opening. Connection hole formed in the other support leg 82.
83 is connected to the tank T as a fluid supply source via a connection pipe (not shown) fixed to the opening end on the opposite side of the seat surface 84.

The test equipment constructed as described above is as follows.
As shown in FIG. 6, in the state in which the connecting member 1 is kept in the pulling position by the retracting operation of the pneumatic cylinder 9, the gear pump 7 to be tested is provided with a connecting hole 83 whose inlet port 73 opens to the seat surface 84. In addition, the outlets 74 are positioned so as to be aligned with the through holes 10 opened at the tip of the support member 1, respectively, and then, as shown in FIG. 7, the pneumatic cylinder 9 is advanced to push out the connection member 1. , O-ring 3 attached to the tip surface
Is lightly pressed against the edge of the outlet 74, and the inlet 73
The edge surface of is lightly pressed against the seat surface 84 via a sealing member such as an O-ring.

That is, in the configuration shown in FIGS. 6 and 7, the connecting member 1 is pressed by the advance of the pneumatic cylinder 9,
The O-ring 3 at the tip is lightly pressed against the edge surface of the outlet 74 to obtain a temporary sealed state at the connection with the flow hole 10 until the pressure fluid is discharged from the outlet 74. The pneumatic cylinder 9 acts as a preload means similar to the push spring 4 shown in FIGS. 1 to 5.

When the gear pump 7 is driven in this state, a test fluid is introduced into the gear pump 7 from the tank T connected to the inlet 73 of the gear pump 7 through the connection hole 83.
The pressure is increased by the rotation of the rotors 71, 72 in the direction shown by the broken line in the figure, flows into the support housing 2 through the outlet 74, the flow hole 10, and is further fed to the load 6 through the connection hole 23. It At this time, as described above, the connecting member 1 receives the holding pressure of the pressure fluid flowing into the support housing 2 and presses it toward the protruding side to the outside, and this pressing causes the O-ring 3 at the tip end. As a result of being strongly pressed against the edge surface of the outlet port 74, the pressure fluid discharged from the outlet port 74 passes through the connection portion whose sealing is strengthened by its own pressure,
It is introduced into the flow hole 10 without leaking outside, and is reliably delivered to the load 6 by following the above-mentioned path. On the side of the introduction port 73 due to the pressing, the edge surface of the introduction port 73 is a connection hole.
It is strongly pressed against the seating surface 84 that borders 83, and the sealing between the two is surely performed.

Therefore, thereafter, the characteristic opening of the variable pump used as the load 6 can be sequentially changed and the characteristic test of the gear pump 7 can be carried out by the procedure of measuring the discharge pressure, the flow rate and the driving load. After completing this test, the drive of the gear pump 7 is stopped to eliminate the action of the pressure fluid, and then the pneumatic cylinder 9 is retracted to release the preload, whereby the above-mentioned connection can be easily released. The gear pump 7 can be removed.

As described above, in the test equipment shown in FIGS. 6 and 7, the gear pump 7 to be tested is positioned between the support legs 80 and 81 of the portal frame 8 and the pneumatic cylinder 9 as the preload means is provided. After the advancing operation, the connection to the tank T as the supply source and the load 6 as the destination is securely made by the easy procedure of allowing the pressure fluid to flow therethrough. It will be canceled. Therefore, the connection of the gear pump 7 to be tested can be promptly changed, which can contribute to the reduction of the time required for the characteristic test of a large number of gear pumps 7, 7 ... And the labor load on the test operator.

FIG. 8 is a schematic cross-sectional view showing another embodiment of the gear pump characteristic test facility using the device of the present invention, in which one end of the support leg 80 of the gate frame 8 and the middle part thereof are provided. The invention device is attached to each of the support legs 81, and the connection holes 83 and 83 are formed in the corresponding portions of the other support leg 81. In this configuration, two gear pumps 7 and 7 are tested simultaneously. Therefore, the test efficiency can be further improved.

The scope of application of the device of the present invention is not limited to the test equipment of the gear pump 7 as shown in FIGS. 6 to 8, but the test equipment of other fluid pumps and other fluid equipment can be tested. The outlet or inlet of the fluid device can be used to connect to a destination or source of test fluid, and this ease of connection and disconnection can achieve improved test efficiency.

Further, the scope of application of the device of the present invention is not limited to the test equipment as described above, but for example, as disclosed in Japanese Patent Laid-Open No. 5-104371 by the applicant of the present application, various shapes of work can be applied. Frequent connection changes, such as use to supply the required hydraulic pressure to the hydraulic cylinders in a workpiece mounting device that is used by mounting a support base equipped with multiple hydraulic cylinders on the surface plate of a machine tool to support the objects from below. Needless to say, it can be used for all the required applications.

[0045]

As described above in detail, in the device of the present invention, the one end surface of the connecting member projecting from the support block is connected to the lead-out port or the introduction target through the annular sealing means mounted on the surface. Holding the pressure fluid by bringing it into contact with the edge surface of the mouth and passing the pressure fluid discharged from the outlet or the pressure fluid introduced into the inlet through the through hole penetrating the connecting member. Since the connecting member is pressed by the pressure and the sealing means is pressed against the edge surface of the outlet or the inlet,
The connection between the fluid outlet or inlet and the destination or source can be easily realized without the need for the former process and also allowing the positional deviation and the difference in diameter.

Further, a precompressing means for precompressing the connecting member in the same direction as the pressing direction by the pressure receiving is provided, and the sealing means is initially pressed, and this state is obtained by the subsequent flow of the pressure fluid. The present invention has an excellent effect such that the connection between the fluid outlet or the inlet and the destination or the source can be realized more easily because the configuration is maintained until the realization of the connected state.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view schematically showing the configuration of the device of the present invention.

FIG. 2 is an explanatory diagram of a usage state of the device of the present invention.

FIG. 3 is a vertical cross-sectional view showing another embodiment of the device of the present invention.

FIG. 4 is a vertical cross-sectional view showing another embodiment of the device of the present invention.

FIG. 5 is a vertical cross-sectional view showing another embodiment of the device of the present invention.

FIG. 6 is a schematic cross-sectional view showing an application example of the device of the present invention in a gear pump characteristic test facility.

FIG. 7 is a schematic cross-sectional view showing an application example of the device of the present invention in a gear pump characteristic test facility.

FIG. 8 is a schematic cross-sectional view showing another embodiment of the gear pump characteristic test facility using the device of the present invention.

[Explanation of symbols]

 1 Connection Member 2 Support Block 3 O-Ring 4 Push Spring 5 Outlet (Inlet) 9 Pneumatic Cylinder 10 Vent Hole 11 Sliding Cylinder 12 Pressure Receiving Cylinder 21 Support Hole 22 Large Diameter Hole 23 Connection Hole

Claims (2)

[Claims] 1. A fluid connecting device used to connect a pressure fluid outlet or inlet to a pressure fluid supply destination or supply source, which has a tubular shape having a through hole passing through an axial center portion. A connection member, a support block slidably supporting the connection member in the axial direction, a support block having a connection hole communicating with the through hole and connected to the destination or the supply source; An annular shape is attached to one end surface of the connecting member protruding outward so as to frame the opening of the flow-through hole, and performs a sealing action between both surfaces by pressing the lead-out port or the introduction port against the surface framed. A sealing means, formed at the other end of the connecting member having an area larger than the inner area of the sealing means,
A fluid connection device comprising: a pressure receiving portion that receives a holding pressure of the pressure fluid passing through the flow hole and presses the connection member in the pressing direction. 2. The fluid connection device according to claim 1, further comprising a precompression unit that precompresses the connection member in the same direction as the direction of pressing by the pressure reception.