JPH07148664A - Sand blasting device using oil pressure - Google Patents

Abstract

PURPOSE:To easily obtain high pressure water using normal hydraulic actuating equipment by providing a hydraulic pump device with booster mechanism for boosting oil pressure, obtained from the hydraulic actuating equipment, to jet high pressure water. CONSTITUTION:A hydraulic connector is connected to the hydraulic port of hydraulic actuating equipment, and a hydraulic pump device is connected through a port hose. When the hydraulic pump device is actuated by oil pressure, oil pressure is boosted by the booster mechanism N of the hydraulic pump device so as to obtain high pressure pumping function. Water is taken into the water inlet side of the pump part of the hydraulic pump device from a required water tank through a primary water hose connected to a water intake end connection 10, and the pressure-boosted water is jetted from a jet nozzle through a secondary water hose connected to a high pressure water discharge port 9 on the water outlet side. At the same time, sand is sucked into the intermediate part of the secondary water hose from a sand grain intake hose by ejecting function, mixed with water in the secondary water hose and jetted from the jet nozzle to perform sand blasting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic sandblasting device.

[0002]

2. Description of the Related Art Conventionally, as a sandblasting apparatus utilizing hydraulic pressure, a hydraulic equipment system such as a hydraulic tank, a hydraulic pump, a pump booster, etc., to which a water hose, a nozzle, a sandwater injection equipment such as a sand tank are connected. It is used. Then, the pump is operated under increased pressure to inject the water from the nozzle of the water hose at a high pressure while inhaling the sand from the sand tank by the ejection action to inject the high-pressure water mixed with the sand.

[0003]

However, in such a conventional sandblasting apparatus, the hydraulic equipment system has a large capacity and is inconvenient because it is inconvenient and expensive to carry.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a hydraulic pump device having a hydraulic connector connectable to a hydraulic port of a separate hydraulic operating device, a hydraulic pump device having a pressure-feeding port hose having a hydraulic connector at its tip, and a hydraulic pump. A primary water hose communicating with the water suction connection port of the device, a secondary water hose communicating with the high-pressure water discharge port of the pump device, an injection nozzle provided at the tip of the secondary water hose, and a middle of the secondary water hose. A hydraulic sandblasting device comprising a sand grain suction hose that branches and communicates, and the hydraulic pump device has a pressure increasing mechanism that can increase the hydraulic pressure obtained from the hydraulically operated device to inject water at high pressure. It is intended to be provided.

[0005]

In the present invention, the hydraulic connector is connected to the hydraulic port of the hydraulic operating equipment mounted on the backhoe or the unic,
Connect the hydraulic pump device via the port hose.

When the hydraulic pump device is actuated by hydraulic pressure, the hydraulic pressure is increased by the pressure increasing mechanism of the hydraulic pump device, and a high-pressure pump function is obtained.

On the water inlet side of the pump section of the hydraulic pump device, water is sucked from a required water tank from a primary water hose, and the pressure-increased water is jetted from a secondary water hose on the water outlet side from a jet nozzle.

At the same time, in the middle of the secondary water hose, sand is sucked from the sand grain suction hose by the eject function, mixed with the water in the secondary water hose and sprayed from the spray nozzle for sandblasting.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual view of the use of a hydraulic sandblasting apparatus A, and B is a hydraulic operation separately from the sandblasting apparatus A. This shows a device, and a backhoe b is used in this embodiment.

The hydraulic port 1 communicating with the hydraulic tank in the backhoe b is connectable with a hydraulic connector 3 provided at the tips of the port hoses 2 and 2'for pressure feeding and tanks.

The base ends of the port hoses 2 and 2'are connected to the hydraulic pump device M.

As shown in FIG. 2, the hydraulic pump device M has a hydraulic port 4 for connecting the port hose 2 for pressure feeding and a tank port 5 for connecting the port hose 2'for tanks on the upper end surface of the case m. It is provided.

A three-way switching valve 6 is connected to the lower end of the hydraulic connection port 4, and the switching valve 6 functions as a pressure adjusting valve.

The hydraulic connection port 4 is connected to a pressure input port 7 of the pressure increasing mechanism N via a three-way switching valve 6, and the tank port 5 is
Each of them is connected to the pressure output port 8 of the pressure increasing mechanism N.

A high-pressure water discharge port 9 and a water suction connection port 10 are provided on the front surface of the case m.
Is the high pressure port 11 of the pressure increasing mechanism N, and the water suction connection port 10 is
Each of them is connected to the water absorption port 12 of the pressure increasing mechanism N.

The water suction connection port 10 has a primary water hose.
The secondary water hose 14 is connected to the high-pressure water discharge port 9, and the tip of the primary water hose 13 is communicated with the water tank 15. hose
16 branch communication.

The tip of the sand grain suction hose 16 is attached to the sand grain tank 17
The secondary water hose 14 sucks sand from the sand grain suction hose 16 and mixes it with the high-pressure water by an injection function accompanying the circulation of the high-pressure water in the secondary water hose 14.

At the tip of the secondary water hose 14, a jet nozzle 18 for jetting sand mixed water is provided.

Reference numeral 19 indicates a pressure adjusting grip, and 20 indicates a pressure gauge attachment port for attaching a high pressure water pressure gauge.

Reference numeral 19-1 is a reflux pipe communicating with the three-way switching valve 6, and the reflux pipe 19-1 communicates with the tank port 5. The arrow in FIG. 2 indicates the hydraulic pressure from the reflux pipe 19-1. 3 and the arrow in FIG. 3 indicates the direction of return from the return pipe 19-1 to the tank port 5.

In this way, the three-way switching valve 6 is connected to the return pipe 19
By switching to the -1 direction, the hydraulic pressure flowing from the hydraulic operating device B through the pressure-feeding port hose 2 is not sent to the pressure increasing mechanism N, and the original hydraulic operating device B is passed through the tank port hose 2 '. And is used when the operation is stopped without operating the pressure increasing mechanism N.

The outline of the sandblasting device A of the present invention is configured as described above, and the pressure oil is supplied from the hydraulic operating mechanism B of the backhoe b via the pressure feeding port hose 2 to the hydraulic pressure of the hydraulic pump device M. Send from the connection port 4 to the pressure increasing mechanism N.

The pressure oil sent to the pressure increasing mechanism N is pressure-increased and returned from the tank port 5 to the hydraulic tank of the backhoe b via the tank port hose 2 '.

In the pressure increasing mechanism of the hydraulic pump device M, the increased pressure is obtained by sucking water from the water tank 15 through the primary water hose 13 to generate high pressure water from the high pressure water discharge port 9 to the secondary water hose. Water is sprinkled inside.

By the injection function of the high pressure water discharged into the secondary water hose 14, the sand is sucked from the sand grain tank 17 through the sand grain suction hose 16 and mixed with the high pressure water to mix the sand from the injection nozzle 18. High-pressure water is jetted.

As described above, in the embodiment of the present invention, the hydraulic pump B is separately used to obtain the hydraulic pressure by utilizing the hydraulic operating device B such as the backhoe b, and the hydraulic pump is increased by the pressure increasing mechanism N to increase the hydraulic pressure. High pressure water is obtained from the apparatus M, and sand particles are mixed with the high pressure water to perform blasting work.

Therefore, the pressure increasing mechanism N for increasing the hydraulic pressure obtained from the separate hydraulic operating mechanism B will be described in detail.

As shown in FIG. 4, in the pressure increasing mechanism N, a primary side cylinder 20 having a large inner diameter and a secondary side cylinder 21 having a small inner diameter are arranged in series, and the inside thereof is arranged. To
A low-pressure side piston 24 having a front piston rod 22 and a rear piston rod 23 and a high-pressure side piston 25 are fixedly connected and reciprocally slidably disposed, and the primary side cylinder 20 is provided in a front chamber 26 and a rear chamber 27. Partition and secondary cylinder
21 is divided into a front chamber 28 and a rear chamber 29, and a switching valve 30 for alternately switching the supply of pressure oil from the inlet P to the front chamber 26 and the rear chamber 27 of the primary cylinder 20 is provided with a switching valve 30.
A pilot valve 32, which is provided on a rear side wall 31 in the rear part and operates the switching valve 30 in conjunction with sliding of the low pressure side piston 24, is provided inside the rear side wall 31, and the pilot valve 32 is provided on the low pressure side piston 24. Rear piston rod protruding from the rear
A supply passage 33 that allows the switching operation to be freely performed by 23 and sends a part of the oil discharged from the switching valve 30 to the front chamber 28 of the secondary side cylinder 21.
A check valve 34 is installed in the middle, and the secondary cylinder 21
A check valve 34 is also provided in the middle of the high-pressure flow path 35 connecting the front chamber 28 and the rear chamber 29 so that the rear chamber 29 and the high-pressure discharge port 36 communicate with each other.

A switching spool 37 is housed in the switching valve 30,
A spring 38 is arranged on one side of the switching spool 37, and a plunger 39 is arranged on the other side.

Reference numeral T denotes a pressure oil discharge port provided in the switching valve 30.

Also, as shown in FIG. 4, the primary cylinder
In the partition wall 40 located between the 20 and the secondary cylinder 21,
A rod integrally connecting the rear piston rod 23 and the front piston rod 22 is slidably penetrated, and a hydraulic side seal mechanism 41 and a hydraulic side seal mechanism 42 are provided between the rod and the through hole. A drain groove 43 is provided between the seal mechanisms 41 and 42.

The drain groove 43 communicates with a drain discharge pipe 44 as shown in FIG.

Therefore, even if the water pressure side seal mechanism 42 is damaged or worn, the water does not leak to the oil pressure side by the oil pressure side seal mechanism 41. If it leaks to the side and water is mixed in the hydraulic tank, the entire hydraulic operating device B is damaged.

Therefore, as described above, the water pressure side sealing mechanism 42
However, in the case of damage, the water pressure reaches the drain groove 43 and is drained from the drain discharge pipe 44 to the outside of the case m. On the other hand, when the water is drained from the drain discharge pipe 44, the pressure side The seal mechanism 42 is damaged and becomes a proof that water is leaking, and it is possible to know when to replace the water pressure side seal mechanism 42.

[0035]

According to the present invention, it is not necessary to bring in a hydraulic device particularly at the site of sandblasting work, and an existing hydraulic operating device such as a backhoe can be used at the site, and the hydraulic port of the hydraulic operating device such as a backhoe can be used. By connecting the port hose for pumping and tank, the hydraulic pressure from the hydraulic equipment is increased by the pressure increasing mechanism of the hydraulic pump device to operate the high pressure hydraulic pump, and water is sucked from the water tank from the primary water hose. High-pressure water is made to flow from the secondary hose, sand is mixed from the sand-grain suction hose 16 in the middle, and sand-mixed water is jetted from the jet nozzle.It is possible to easily obtain high-pressure water by using ordinary hydraulically operated equipment. In addition, the sandblasting work can be easily performed by simply bringing the hydraulic pump device into the field.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a usage state of a hydraulic sandblasting apparatus of the present invention.

FIG. 2 is a sectional front view of the device of the present invention.

FIG. 3 is a sectional side view of the device of the present invention.

FIG. 4 is a cross-sectional view of a pressure increasing mechanism used in the device of the present invention.

[Explanation of symbols]

 A sandblasting device B hydraulic operating device b backhoe M hydraulic pump device m case N pressure increasing mechanism 1 hydraulic port 2 pressure feeding port hose 2'tank port hose 3 hydraulic connector 4 hydraulic connection port 5 tank port 6 three-way switching valve 7 input pressure Port 8 Outlet port 9 High pressure water discharge port 10 Water suction connection port 11 High pressure port 12 Water suction port 13 Primary water hose 14 Secondary water hose 15 Water tank 16 Sand grain suction hose 17 Sand grain tank 18 Injection nozzle

Claims (1)

[Claims] 1. A hydraulic port of a separate hydraulically operated device (B)
Hydraulic pump (M) with a hydraulic connector (3) that can be connected to (1) and a port hose (2) for pumping with a hydraulic connector (3) at the tip, and the water suction of the hydraulic pump (M). The primary water hose (13) communicating with the connection port (10), the secondary water hose (14) communicating with the high-pressure water discharge port (9) of the pump device, and the secondary water hose (14) Sand grain suction hose branched and connected in the middle of the injection nozzle (18) and the secondary water hose (14)
(16), and the hydraulic pump device (M) is characterized by having a pressure increasing mechanism (N) capable of increasing the hydraulic pressure obtained from the hydraulically operated device (B) to perform high-pressure water injection. A hydraulic sandblasting device.