JP2515640Y2 - Fluid booster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a fluid pressure boosting device that uses a pressure fluid to boost and output the fluid itself or another fluid.

[Prior Art] The inventors of the present invention have previously proposed, in Japanese Utility Model Laid-Open No. 62-108601, a pressure booster that boosts and outputs fluid pressure itself.

The previously proposed pressure booster includes a main body block having an inlet port, an outlet port, and a discharge port, and a pair of cylinders sandwiching the main body block, and a piston reciprocating in the cylinders is hermetically sealed in the main body block. Are connected to each other by a rod penetrating each of the cylinders, and the insides of both cylinders are divided by the pistons into a pressure increasing chamber and a drive chamber, respectively. Supply and reciprocate the piston,
The fluid in the pressure boosting chamber is boosted by the reciprocating movement of the piston.

In this pressure booster, the pressure increase ratio of 2 or less can be set as appropriate by adjusting the fluid pressure (air pressure) supplied to the drive chamber with a governor. It is necessary to make a structural modification, and generally, the piston area ratio on the drive side and the pressure increasing side is changed according to the pressure increasing ratio to be obtained. However, in such a structure, it is necessary to manufacture various parts for each pressure increase ratio to be obtained, and it is difficult to share the parts, and there is a problem that a large cost is required.

[Problems to be Solved by the Invention] A problem to be solved by the present invention is to provide a fluid pressure booster having a pressure boosting ratio of 2 or more as a structure in which parts can be shared as much as possible so that the fluid pressure boosters having different pressure boosting ratios can be used. It is to reduce the manufacturing cost of the device.

[Means for Solving the Problems] In order to solve the above problems, the fluid pressure booster of the present invention is
A pair of cylinders are provided on both sides of the main body block, and the pistons that reciprocate in these cylinders are connected to each other by a rod that penetrates the main body block in an airtight manner. A fluid pressure booster that divides into a drive chamber and supplies pressure fluid alternately to the drive chambers of a pair of cylinders by a switching valve provided in the main body block to cause the piston to reciprocate and pressure increase the fluid in the pressure boost chamber. In the above, the cylinder is configured by attaching a side cover to an outer end of a tube whose one end is fitted to the main body block, and the side cover has a tube which is a common component with the tube of the cylinder, and has a pressure increasing ratio. A connecting structure for connecting the increasing number of connected cylinders is provided, and the rod of the piston in the cylinder is connected to the side cover. A connecting structure for connecting the piston rods of the continuous cylinders is provided, and the side cover is provided with a through hole for guiding the fluid pressure supplied to and discharged from the switching valve to each drive chamber. .

In order to solve the same problem, a pair of cylinders are provided on both sides of the main body block, and pistons that reciprocate in these cylinders are connected to each other by a rod that hermetically penetrates the main body block. The two cylinders are each divided into a pressure boosting chamber and a drive chamber, and a switching valve provided in the main body block alternately supplies the pressure fluid to the drive chambers of the pair of cylinders to reciprocate the pistons and In a fluid pressure booster for boosting and outputting a fluid, the cylinder is configured by attaching a first side cover to an outer end of a first tube having one end fitted to a main body block. The one end of the second tube forming the continuous cylinder for increasing the pressure increasing ratio is attached to the second tube, and the second side cover is attached to the outer end of the second tube. A continuous piston for mounting and partitioning the two drive chambers is provided in the second tube, and the continuous rod of the piston is connected to the rod of the piston to connect the first and second tubes to the first tube. The second side cover, the piston, and the continuous piston are configured as common parts with the same structure, and the fluid supplied to and discharged from the switching valve to each drive chamber is provided to the first and second side covers. The feature is that a through hole for guiding pressure is provided.

[Operation] When the piston is driven together with the rod to reach the stroke end, the compressed air in one of the pressure boosting chambers is boosted and output is completed, and the switching valve is switched, so that the piston and the rod are driven in the opposite directions. The pressure-increased fluid is continuously output from both pressure-increasing chambers by repeating.

In this case, since the side cover and the rod of the cylinder are provided with the connecting structure for connecting the tube of the continuous cylinder and the piston rod for increasing the pressure increase ratio,
The output secondary pressure can be arbitrarily set by appropriately connecting the side cover with a continuous cylinder, which is a common component.

Further, since the continuous cylinder and the piston rod for increasing the boosting ratio, which is a common component, are attached to the first side cover and the rod, in the fluid booster in which the components are shared, both pressure boosting chambers can be removed. The output secondary pressure can be almost quadrupled.

[Embodiment] In the embodiment of the present invention shown in FIGS. 1 and 2, first, the substantially same constituent parts as those already proposed will be described.

Main body block 1 arranged in the center of this fluid pressure booster
Includes an inlet port 2, an outlet port 3 and a discharge port 4, and a pair of cylinders 5A and 5B are arranged in series on both sides of the body block 1 with pistons 6a and 6b slidable in the cylinders. Are connected to each other by a rod 7 penetrating the main body block 1 in an airtight state, and the insides of both cylinders 5A and 5B are inside by pistons 6a and 6b (main body block 1
Side) pressure increasing chambers 8a, 8b and outer drive chambers 9a, 9b.

Further, in the fluid passage formed inside the main body block 1, there are inlet check valves 10a and 10b and outlet check valves 11a and 1a.
1b, a governor 12 and a switching valve 13 are incorporated respectively, and external flow paths 14a and 14b are additionally provided outside the main body block 1.

The inlet check valves 10a and 10b allow only the inflow of fluid from the inlet port 2 to the pressure boosting chambers 8a and 8b, and the outlet check valves 11a and 11b allow the fluid to flow from the pressure boosting chambers 8a and 8b to the outlet port 3. It only allows outflow. The governor 12 is for adjusting the pressure supplied to the drive chambers 9a, 9b to control the output pressure (secondary pressure) from the outlet port 3, and the switching valve 13 is for switching the drive chambers 9a and 9a. One of 9b is switched and communicated with the inlet port 2 via the governor 12, and the other is connected to the discharge port 4
It is for switching and communicating.

Thus, the inlet 16, the feedback port 17 and the outlet 18 of the governor 12 are connected to the inlet port 2, the outlet port 3 and the input port 19 of the switching valve 13 by the flow paths in the main body block 1, respectively. Further, the output port 20a of the switching valve 13,
20b and the exhaust ports 21a, 21b are connected to the drive chambers 9a, 9b and the discharge port 4 by the flow passages in the main body block 1 and the external flow passages 14a, 14b, respectively, and are used for position switching provided in the switching valve 13. Pressure chamber 8 with push rods 22a and 22b by springs
If the reciprocating pistons 6a, 6b abut the push rods 22a, 22b by projecting them into the rods 22a, 2b.
2b is alternately pushed against the urging force of the spring, the switching valve 13 is switched, and the drive chambers 9a, 9b are alternately communicated with the governor 12 and the discharge port 4.

The fluid pressure booster of the present invention is the above-mentioned proposed pressure booster by adding a structure as described below to a device having a pressure boost ratio of greater than 2 while sharing parts as much as possible. It is composed.

That is, in the pressure booster having the above-mentioned configuration, the body block 1
The ends of the first tubes 31a, 31b of the cylinders 5A, 5B described above are fitted to the left and right sides of the cylinder via seals, and the outer ends of these tubes are sealed with the first tube 31a, 31b. Side covers 32a and 32b are attached. Further, the first side covers 32a, 32b are connected to each other by a seal cylinder 35.
The second tubes 36a and 36b constituting A and 35B are attached, and the second side covers 37a and 37b are attached to the outer ends of these tubes. Tubes 31a, 31b, 36a, 36b of these cylinders 5A, 5B, 35A, 35B, and side covers 32a, 32b, 37a, 3
7b are provided as parts having the same structure, and these cylinder tubes and side covers are fixed to the main body block 1 by fastening with tie rods (not shown).

Tubes 31a, 31b, 36 of both cylinders 5A, 5B, 35A, 35B
a and 36b are arranged on the same axis line, and at both ends of the rod 7 that connects the pistons 6a and 6b in the cylinders 5A and 5B, a continuous piston 38a that slides in the continuous cylinders 35A and 35B. , 38b are connected to piston rods 39a, 39b. The piston rods 39a, 39b are formed in the center holes 33a of the first side covers 32a, 32b,
33b is airtightly penetrated, and the continuous pistons 38a, 38b are connected to the second and third drive chambers 41a, 42a and 41b, in the continuous cylinders 35A, 35B.
42b is partitioned and formed.

The pistons 6a, 6b and the pistons 38a, 38b have the same structure and are made into common parts.

As shown in FIG. 2 and FIG. 4, the piston rods 39a, 39b are connected to the both ends of the rod 7 by surrounding grooves 45a, 45 near the opposite ends of the rod 7 and the piston rods 39a, 39b, respectively.
b, 46a, 46b are provided, and the protrusions 48, 48 fitted in these circumferential grooves are provided.
A pair of half retaining rings 47, 47 with the
And the piston rod 39a or 39b is attached to the joint, and the pistons 6a and 6b are fitted or screwed on the half-stop rings 47 and 47 from the pressure increasing chambers 8a and 8b side. It is fixed.

As will be described later, since a large pressure is constantly applied to the pistons 6a and 6b from the pressure increasing chambers 8a and 8b, the pistons 6a and 6b are prevented from moving on the rod 7 toward the drive chambers 9a and 9b. It may be fixed using the retaining rings 47, 47. The protrusions 48 of these retaining rings and the circumferential grooves 46a, 46 on the rod are
By providing a margin with b, it is possible to absorb the misalignment of the connecting rods.

On the other hand, the continuous pistons 38a, 38b and the piston rods 39a, 39b
As shown in FIG. 2 and FIG. 5, the connection with is provided with circumferential grooves 49a, 49b at the tip of the piston rod, and a pair of half retaining rings 50, 50 fitted in the circumferential grooves 49a, 49b are driven. Continuous pistons 38a, 38b fitted from the chambers 41a, 41b side and the pistons 38a, 38b
This is performed by fitting and holding the fixing screws 52, 52 screwed from the tip side of the piston rods 39a, 39b into the circumferential grooves 49a, 49b. Since the fluid pressure acts alternately from the drive chambers on both sides of the continuous pistons 38a and 38b, the pistons 38a and 38b are
It is necessary to fix a and 38b so that they will not move on the piston rod on either side.

As described above, the first and second side covers 32a, 32
b, 37a, 37b have the same structure. Therefore, center holes 55a, 55b are also provided in the second side covers 37a, 37b, and these holes are closed by pins 56 from the inside. Processing can be omitted. In addition, the first and second side covers 32a, 32b, 37a, 37b include the switching valve 13 and the external flow paths 14a, 1
Through holes 58a, 58b are provided for guiding the fluid pressure supplied to and discharged from each drive chamber through 4b. These through holes 58a, 58b,
The external flow paths connected to the output ports 20a, 20b of the switching valve 13 and each of the external flow paths 14a, 14b formed of two pipes, and connecting the external flow paths 14a, 14b to the adjacent side cover, and one side of the side cover. It is formed so as to communicate with the pressure chamber.

In these through holes 58a, 58b, unnecessary portions are closed by a plug or the like during use, and as a result, the output port 20a of the switching valve 13 is driven by the external flow path 14a and the drive chambers 9a, 42a and 4a.
The output port 20b of the switching valve 13 is connected to the drive chambers 9b, 42b and 41a by the external flow path 14b and the through hole.

 Next, the operation of the fluid pressure booster will be described.

In Fig. 1 and Fig. 2, the piston reaches the right end with the rod, and the compressed air in the left pressure boosting chamber 8b is boosted and output, and at the same time, the switching valve 13 is switched to the illustrated position to drive. Room
9a, 42a and 41b are communicated with the inlet port 2 via the switching valve 13 and the governor 12, and at the same time, the drive chambers 9b, 42b and 41b
The state where a is opened to the atmosphere through the switching valve 13 is shown.

Therefore, the piston and rod are driven by the drive chambers 9a, 42a and 41.
Drive to the left is started by the combined force of the force acting on the piston at b and the force acting on the piston 6b at the left pressure boosting chamber 8b, and along with this, the compressed air in the right pressure boosting chamber 8a is compressed. Is compressed and output from the outlet port 3 through the outlet check valve 11a. In parallel with this, the line air as the primary pressure is supplied from the inlet port 2 to the inlet check valve 10b.
It goes without saying that the gas flows into the pressure increasing chamber 8b through.

In this way, when the piston and rod reach the left end, the push rod 22a is pushed by the piston 6a and the switching valve 13 is automatically switched to the position opposite to that shown in the drawing, whereby the piston and rod move to the right. The line air whose pressure is increased in the pressure increasing chamber 8b is output through the outlet check valve 11b, and the line air whose pressure is increased is continuously output from both pressure increasing chambers by repeating such an operation.

As described above, the secondary pressure output from the outlet port 3 of the pressure intensifier is four times the maximum primary pressure because the primary pressure acts on each piston, and can be arbitrarily adjusted by the governor 12. You can

FIG. 6 shows the continuous cylinder 35A,
35B is omitted, and a case where the pressure booster is used as a pressure booster with a boosting ratio of 2 is shown.

In the pressure booster of the present invention, the required number of pressure boosting ratios can be obtained by connecting a required number of consecutive cylinders to the cylinders 5A and 5B, but as shown in FIG. It is also possible to use the installation cylinders in a state in which they can be connected in series without connecting them in series.

Further, in the above-described embodiment, the case where the pressure air is used as the primary side fluid and the pressure air itself is boosted has been described. However, when boosting the output of a different fluid, for example, when pumping a liquid by the pressure air. It can also be used for, and depending on the application, the governor can be omitted.

According to the pressure increasing device having such a configuration, the main part of the device is made into a common part, and the necessary number of consecutive cylinders can be sequentially connected in the longitudinal direction according to the pressure increasing ratio, so that the governor can also be used. As a result, the primary side fluid can be used for boosting at an arbitrary boosting ratio, and the boosting ratio can be freely changed by increasing or decreasing the number of parts.

In addition, the structure is designed so that parts can be shared as much as possible when the boosting ratio can be set arbitrarily.
The manufacturing cost of the fluid pressure booster can be reduced.

[Advantages of the Invention] According to the present invention described in detail above, a fluid pressure booster having a pressure boosting ratio of 2 or more can be configured by sharing components as much as possible, and thereby, a fluid pressure booster having various pressure boosting ratios. It is possible to reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is a vertical sectional front view showing the specific configuration thereof, FIG. 3 is an explanatory diagram of its external flow path, and FIGS. 4 and 5 are FIG. 6 is a cross-sectional view of an essential part showing a connection mode of a piston and a rod, and FIG. 1 ... Main body block, 5A, 5B ... Cylinder, 6a, 6b, 38a, 3
8b ... Piston, 7,39a, 39b ... Rod, 8a, 8b ... Boosting chamber, 9a, 9b, 41a, 41b, 42a, 42b ... Drive chamber, 13 ... Switching valve, 31a, 31b, 36a , 36b ... tube, 32a, 32b, 37a, 37b ...
… Side covers, 35A, 35B …… Consecutive cylinders, 58a, 58b…
… Through holes.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Noruhisa Kaneko 6-19-1 Inari, Soka City, Saitama SMC Co., Ltd. Grass processing plant (56) References 47-27841 (JP, B1)

Claims (2)

(57) [Scope of utility model registration request] 1. A pair of cylinders are provided on both sides of a main body block, and pistons that reciprocate in these cylinders are connected to each other by a rod that penetrates the main body block in an airtight manner. Divided into pressure boost chambers and drive chambers respectively, a switching valve provided in the body block alternately supplies pressure fluid to the drive chambers of a pair of cylinders to reciprocate the pistons and boost the pressure boosting fluid in the pressure boost chambers. In the fluid pressure booster described above, the cylinder is configured by attaching a side cover to an outer end of a tube whose one end is fitted to the main body block, and the side cover has a tube which is a common component with the tube of the cylinder. And a connecting structure for connecting the continuous cylinders for increasing the pressure increasing ratio, and the rod of the piston in the cylinder is A connecting structure for connecting the piston rods of the continuous cylinders that are connected to the drive cover, and the side cover is provided with a through hole for guiding the fluid pressure supplied to and discharged from the switching valve into each drive chamber. A fluid pressure booster characterized by the above. 2. A pair of cylinders are provided on both sides of the main body block, and pistons that reciprocate in these cylinders are connected to each other by a rod that penetrates the main body block in an airtight manner. Divided into pressure boost chambers and drive chambers respectively, a switching valve provided in the body block alternately supplies pressure fluid to the drive chambers of a pair of cylinders to reciprocate the pistons and boost the pressure boosting fluid in the pressure boost chambers. In the fluid pressure booster, the cylinder is configured by attaching a first side cover to an outer end of a first tube having one end fitted to a main body block, and a pressure boosting ratio is applied to the first side cover. One end of a second tube that constitutes a continuous cylinder for increasing the number is attached, and a second side cover is attached to the outer end of the second tube. A continuous piston for partitioning two drive chambers is provided in the tube, and the continuous rod of the piston is connected to the rod of the piston, and the first and second tubes, the first and second side covers are provided. Further, the piston and the continuous piston are configured as common parts having the same structure, and a passage for guiding the fluid pressure supplied to and discharged from the switching valve to each drive chamber is provided to the first and second side covers. A fluid pressure booster having a hole.