JPH0242793Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a swivel for feeding fluids such as water, cement milk, etc. to a plurality of drilling rods.

[Prior art and its problems]

Traditionally, as a means of supplying fluids such as water and cement milk to multiple drilling rods, a single pump has been used to distribute fluids to multiple drilling rods at the same time. As a result, the resistance value of the fluid flow fluctuates, and eventually the fluid flows more easily in the direction of lower resistance, so the amount of fluid flowing into each drilling rod is not constant and constantly fluctuates.

In order to avoid such problems, it may be possible to install a dedicated pump for each drilling rod, but
The drawbacks were that it was too expensive and the device itself became large.

[Purpose of invention]

In view of this, the present invention aims to eliminate the drawbacks of the conventional method by providing a flow dividing swivel using a rotary distribution pipe to enable equal pressure distribution of fluid to each drilling rod with a single pump. This was done as a.

[Summary of the idea]

In order to achieve the above object, the present invention provides a swivel for supplying fluids such as water and cement milk to a plurality of drilling rods. The casing has a rotary distribution pipe, and the rotary distribution pipe includes an inflow hole that receives fluid from the pump therein, and a discharge hole opened at different positions in the vertical axial direction with respect to the inflow hole, and the casing has a An inflow hole that is always in communication with the inflow hole and connected to the pump side, and a plurality of discharge holes that can be matched with the discharge holes, are opened in a radial direction corresponding to the number of drilling rods, and are connected to each drilling rod side. It is characterized by a swivel comprising:

[Example of the present invention]

Hereinafter, the present invention will be explained with reference to the embodiments shown in FIGS. 1 to 6.

Figure 1 shows the main parts of an excavator to which the present invention is applied, which has multiple drilling rods 1, 1, etc., and the upper part of the excavating rods 1, 1... has a built-in motor and speed reducer. There is a drive section 2, and a drive section 2
A swivel 3 according to the present invention is attached to the upper part of the swivel 3, and an inflow pipe 4 from a pump (not shown) is connected to the discharge pipe 5, 5, . . . leading to each drilling rod 1, 1, . It is well established.

As shown in an example cross section in FIG. 2, the swivel 3 according to the present invention includes a casing 6, a rotary distribution pipe 7 rotatably supported within the casing 6, and a rotation distribution pipe 7. It is configured by a geared motor 8 that provides.

A hole 9 is provided in the casing 6 for fitting the rotary distribution pipe 7 therein, and holes larger than the hole 9 are provided at the upper and lower ends of the casing 6. Bearing 1 supporting distribution pipe 7
The outer sides of 0 and 10 are fitted.

The inflow pipe 4 is disposed on the outer upper part of the casing 6.
1 inlet 1 for connecting by screwing
1 is provided, and this inlet 11 is connected to the casing 6
The annular hole 12 has an inner diameter slightly larger than the hole 9 provided therein, and is always in communication with an annular hole 12 provided at the same height as the inlet 11.

Similarly, in the outer lower part of the casing 6, discharge ports 13, 13, . . ., for connecting the plurality of discharge pipes 5, 5, . , three are provided at 120 degree intervals. And these discharge ports 13, 13,
13 are opened on the inner peripheral surface of the hole 9, respectively.

The rotary distribution pipe 7 is connected to the hole 9 of the casing 6.
and is supported by the bearings 10, 10 to be rotatable within the casing 6,
At the center of the shaft, there is a passage 1 of appropriate thickness and required depth from below.
4 is drilled. And in this passage 14,
An inflow hole 15 is formed in the upper part from one side of the outer periphery at a height that matches the annular groove 12 of the casing 6.
and at the bottom, the discharge port 1 of the casing 6
A discharge hole 16 is bored at a height corresponding to 3. The discharge hole 16 is opened over an area of 120 degrees so as to cover the two discharge ports 13 as shown in the fourth figure.

Further, the passage 14 is closed by a pin 17 having the same diameter as the passage 14 at the lower part, leaving a region intersecting with the inflow hole 15 and the discharge hole 16.

Note that in this embodiment, the inlet 11 from the pump
Although the inlet hole 15 is arranged perpendicular to the axis, it may be arranged in the axis direction.

The geared motor 8 is mounted on the casing 6 for rotating the rotary distribution pipe 7, and a shaft joint 18 provided on the rotation distribution pipe 7 in the casing 6 and a shaft 19 on the motor 8 side are connected to each other. They are integrated by a connecting means such as a key.

Therefore, when the motor 8 is driven, the rotary distribution pipe 7 rotates in the direction of the arrow within the casing 6 via the bearings 10, 10.

In the figure, 20 is a seal that prevents pressure leakage.

Next, the operation of the above embodiment will be explained.

When the geared motor 8 is driven to rotate the rotating distribution pipe 7 in the casing 6, the discharge hole 16 of the rotation distribution pipe 7 is always connected to one or two of the three discharge ports 13 provided in the casing 6. communicate.

Therefore, when a fluid such as water or cement milk is caused to flow into the casing 6 through the inlet 11 from a pump (not shown), the fluid will flow more than the inlet 15 no matter where the inlet hole 15 of the rotary distribution pipe 7 is located. Since it flows into the large annular groove 12, it flows through the inlet hole 15, through the passage 14 of the rotary distribution tube 7, and into the discharge hole 16.

At this time, since the discharge hole 16 communicates with at least one or two of the three discharge ports 13 of the casing 6 as described above, the discharge from the three discharge ports 13 is intermittently. A fixed amount of fluid is discharged at a fixed pressure.

Therefore, the same amount of fluid is supplied to each of the drilling rods 1, 1, . . . driven by the drive unit 2 through the discharge pipes 5, 5, .

The above embodiment has been described only in the case where the motor 8 is placed at an arbitrary position on the drive unit 2 and used as a means for imparting rotation to the rotary distribution pipe 7. However, as shown in FIGS. 5 and 6, , it is also possible to connect directly to the output shaft of the drive unit 2 and rotate the rotary distribution pipe 7 by rotation of this output shaft. An embodiment in this case will be described with reference to FIGS. 5 and 6. The lower end of the rotary distribution pipe 7 is connected to the upper end of the output shaft 21 of the drive unit 2, and the rotary distribution pipe 7 is connected to the upper end of the reduction gear 22. A discharge port 1 is rotatably supported in a casing 6 mounted and supported on the casing 6, and a discharge port 1 communicating with a flow passage 14 provided in a rotary distribution pipe 7 is provided on the side of the casing 6.
3... are each provided with an inlet 11 at the top for supplying fluid into the flow path 14. The rotation of the output shaft 21 rotates the rotary distribution pipe 7, and the fluid introduced into the distribution pipe 7 is discharged from the discharge ports 13 through the discharge hole 16, as in the above embodiment.

In addition, 23 in the figure is the output shaft 2 provided on the output shaft 21.
24 is a fluid supply port of the swivel portion 23, 25 is a fluid passage provided in the output shaft 21, and 26 is a connection between one of the discharge ports 13 and the fluid supply port 2.
This is a hose that connects the four.

In addition, in the above two embodiments, the case where one or two discharge holes 16 of the rotary distribution pipe 7 are always in communication with the discharge ports 13 of the casing 6 has been explained.
It may be one piece like the upper inflow hole 15. However, in this case, the discharge hole 16 is narrow, so while one drilling rod 1 is being supplied, the discharge ports 13, 13 to the other two drilling rods 1 are closed. .

Furthermore, although the explanation has been given for the case where there are three discharge ports 13, the number can be increased or decreased depending on the number of drilling rods 1, and the number is not necessarily limited to the number, and it can be applied as long as there are at least two or more drilling rods. be.

[Effect of idea]

Since the present invention is constructed as described above, it is possible to distribute equal pressure to each drilling rod with one pump by using rotary distribution piping.
Unlike in the past, there is no variation in the supply of chemical fluid to the drilling rods due to drilling resistance, and fluid can always be supplied to each drilling rod in sequence at a constant pressure. In addition, unlike in the past, there is no need to provide a dedicated pump for each excavation rod, so there is no need to increase the size and cost of the equipment, and although the structure is not much different from the conventional supply structure, it is highly effective. Can be done.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the state in which the swivel according to the present invention is applied to an excavator, Fig. 2 is a front view including a partial cross section of the swivel of the present invention, and Fig. 3 is a cross-sectional view of A in Fig. 2. , FIG. 4 is a sectional view of B in FIG. 2, FIG. 5 is an explanatory diagram when applied as another embodiment, and FIG.
The figure is an enlarged partial cross-sectional view. DESCRIPTION OF SYMBOLS 1...Drilling rod, 3...Swivel, 6...Casing, 7...Rotating distribution pipe, 8...Geared mower, 11...Inlet, 12...Annular groove, 13...
...Discharge port, 14...Passage, 15...Inflow hole, 16
...Discharge hole.

Claims (1)

[Scope of utility model registration request] In the swivel 3 that supplies fluids such as water and cement milk to a plurality of drilling rods, the casing 6
and a rotary distribution pipe 7 rotatably supported within the casing and connected to appropriate rotation means,
The rotary distribution pipe 7 includes an inflow hole 15 that receives fluid from the pump, and a discharge hole 16 that is opened at different positions in the vertical axial direction with respect to the inflow hole, and the casing 6 has an inflow hole 15 that receives fluid from the pump. an inflow hole 11 that is always in communication with the pump side and connected to the pump side, and a plurality of discharge holes 13 that can freely match the discharge holes 16 and are opened in the radial direction corresponding to the number of drilling rods and are connected to each drilling rod side. A swivel equipped with.