JPS59103976A - Plunger pump for slurry pressure feed - Google Patents

Abstract

PURPOSE:To make a leakage of high pressure slurry outside preventable, by adjoining a feed chamber and a pressure chamber with a sealing device in between, while letting the high pressure slurry leaked from the sliding clearance of a plunger slide hole flow into the feed chamber. CONSTITUTION:A feed chamber 3 and a pressure chamber 4 are adjoined close to each other with a sealing device 5 in between, while a plunger 6 is hermetically and slidably inserted through into a plunger slide hole 5a of the sealing device 5. Therefore, granting that high pressure slurry inside the pressure chamber 4 is leaked from a sliding clearance of the plunger slide hole 5a, this high pressure slurry flows in the inside of the feed chamber; in no case leaks outside, never. In addition, since at least a sliding surface part between the outer circumferential surface of the plunger 6 and the plunger slide hole 5a is constituted of a ceramic material, it is excellent in abrasion resistance so that highly superior pump performance is maintainable for a long period of time.

Description

[Detailed Description of the Invention] The present invention is applicable to slurry'f such as cement milk or muddy water.
Regarding the slurry pump/jabo/g that is pumped at +'i6 pressure, it is possible to prevent high pressure slurry from leaking to the outside, and
The purpose is to increase the durability of the

In the case of conventional plunger bongs for pumping slurry, there is a seat type valve (1) with a structure in which the valve surface is seated on the valve seat as a valve for controlling suction and a valve for controlling discharge of slurry, so foreign matter in the slurry This has the drawback that the high-speed slurry flow flowing through the gap 114j quickly wears out the pump 1, causing it to become inoperable, and it also causes foreign matter to get caught in the sliding gap between the gear and the casing-side sealing body. In addition to severely damaging the gran/ya and lowering the discharge pressure, there were also problems in that high-pressure slurry leaked to the outside.

In view of the drawbacks listed in C1 and VII of the present invention, a plunger is slidably inserted into the plunger sliding hole provided at the boundary between the supply chamber connected to the slurry suction port in the casing and the KA08E chamber, and the plunger is applied. The slurry is made to be able to freely slide forward and backward into the pressure chamber, and the high-pressure slurry leaking from the pressurization chamber through the sliding gap of the Gura/Jar sliding hole is collected into the supply chamber.
At least the sliding surface portion of the outer circumferential surface of the roller and the inner curved portion of the sliding hole is made of a ceramic material, and each spool valve is used as a suction control sieve valve and a discharge control valve. I/- again.

Embodiments of the present invention will be described below with reference to the drawings.

Slurry pump IJ-j for pressurizing cement milk etc. to high pressure according to the present invention A supply chamber 6 is formed on the proximal end side of the cylindrical internal cane knob 1, and a supply chamber 6 is formed on the distal end side [chamber 4 is provided, supply chamber 6 and An annular sealing member 5 made of a ceramic material is fitted into the inner casing 1 at the boundary with the pressurizing chamber 4, and a plunger 6 is inserted into the plunger sliding hole 5a of the sealing member 5.

Insert the plastic/jar 6 into the supply chamber 5, and insert the sealed and slidable VC into the plastic/jar insertion hole 5aK, with its tip facing the pressurizing chamber 4, and the base end of the plastic/jar 6. The connected driving rod 7 is led out of the inner casing 1 from the rod sliding hole 8 in the base end wall of the supply chamber 5, and the driving rod 7
By interlocking and connecting with a drive device (not shown), the ground gear 6 can be driven forward and backward into the pressurized ¥4.

The internal casing 1 is fitted into the external casing 2, and the slurry suction port 9'f is opened on one side of the external casing 2:
-I of the outer casing 2 as well as communicating with the supply chamber 6
A slurry discharge port 10 opened at 1111 is communicated with the pressurizing chamber 4 through a discharge passage 11.

Furthermore, a suction passage 12 is provided inside the tip portions of the glass/jar 6 and the drive rod 7, the suction passage inlet 16 is opened to the supply chamber A, and the suction passage outlet 14 at the tip of the suction passage 12 is pressurized. It opens into the chamber 4, and the suction passage outlet 14 of C can be opened and closed by a suction passage cutoff valve V1.

That is, the suction passage outlet 14 is opened at the side of the valve chamber 15 at the tip of the suction passage 12, and the spool valve body 16 is inserted into the valve chamber 15 so as to be slidable forward and backward in the axial direction of the granger 6.
The valve shaft end 16a of the spool valve body 16 is led out of the tip of the glass/jar 6, and a locking nut 17 is screwed there.

Further, the Sugur valve body 16 is urged to close toward the base end of the suction passage 12 by a valve closing spring 18 .

It should be noted that the tip member 6a is made of metal and 19 is a cushioning rubber.

Here, in order to prevent each sliding part from being worn out by the slurry, the 1 langeer 6 is made of a ceramic material with excellent wear resistance, and the outer peripheral portion of the Sgur valve body 16 is made of a cylindrical body 16b made of a ceramic material.

In this way, the sliding portion of the glass/jar sliding hole 5a portion is made of ceramic material, and the sliding portion of the Sgur valve body 16 is also made of ceramic material.

Next, a discharge passage cutoff valve V2 for opening and closing the discharge passage 11 is formed within the thick wall portion of the external cage puffer 2.

That is, a discharge passage valve chamber 20 is provided coaxially with a continuous line at the starting end of the discharge passage 11, a downstream discharge passage 11 is opened at the side of this valve chamber 20, and a discharge passage is connected to the discharge passage valve chamber. Sgur valve body 2
1 is inserted so as to be movable forward and backward, and the discharge passage Sgur valve body 21 is urged to close by a discharge passage closing valve spring 22.

Similar to the suction passage isolation valve V1, this discharge passage isolation valve ■2
The sliding part is also made of sliding ceramic materials as shown below.

That is, the chamber wall portion of the discharge passage valve chamber 20 is entirely formed of a cylindrical body 20a made of ceramic material, and the outer peripheral portion of the discharge passage Sgur valve body 21 is formed of a cylindrical body 21a made of ceramic material. Incidentally, of the discharge passage 11 around the discharge passage cutoff valve V2, the upstream Itl11 portion 11a has two passages shown in FIG. 3, and the downstream portion 11ba is a cylindrical passage.

Hereinafter, the operation of the slurry pumping Ponog P will be explained.

When the drive device moves the drive rod 7 backwards as shown in FIG.
The internal pressure becomes negative, which acts on the Sgur valve body 16 to close the discharge passage isolation valve V2 and close the suction passage isolation valve V1.
The valve opens, and the Cla IJ- flows from the slurry suction port 9 to the supply chamber 6, the suction passage inlet 115, the suction passage 12, and the suction passage outlet 14.
The air is inhaled into the pressurized chamber 4 through the air.

At the next moment, when the drive door 'f: is moved forward as shown in the first factor, the plunger 6 advances into the pressurizing chamber 4, and the Sgur valve body 16 closes the suction passage outlet 14, and the pressurizing chamber Pressurize the slurry in 4 to about 400 ”
Discharge from 0.

Even if the high-pressure slurry in the pressurizing chamber 4 leaks from the sliding gap between the gra/jar 6 and the plunger insertion hole 5a during the pressurization, it will flow into the supply chamber 5.
High-pressure slurry will not leak out of K/Nodato 2.

Furthermore, the same curved portion of the drive rod sliding hole 8 has a low pressure/ru 22.
Just seal it with.

As an example of the drive type of the slurry pressure-feeding bong P, as shown in FIG.
The drive rod 7 is interlocked and connected to the Kura/Kungift 26, and the shaft end of the Kura/Kungift 26 is driven by the electric motor 24 or other driving means.
First, it is economical to use a multi-cylinder general-purpose engine.

The low-pressure slurry is fed from the agitation tank 25, pressurized, and then pumped to the discharge pipe 26.

In addition, as a modification of the above-mentioned slurry pressure feeding Gra/Japo/G, as shown in FIG. At the same time, the side part of the valve chamber 15 is communicated with the pressurizing chamber 4 through the suction passage 12, and the suction passage 12 is made openable and closable by the Sugur valve body 16 which is biased to close by the valve closing spring 18. The other end of 15 is communicated with the pressurizing chamber 4 through a pressure receiving path 25.

Therefore, the present invention has the following effects.

(1) The supply chamber and the pressurizing chamber are adjacent to each other with a sealing device in between, and the Granonoyer can be slidably inserted into the granger sliding hole of the sealing device, so that the high-pressure slurry in the pressurizing chamber can be Even if the high-pressure slurry were to leak from the sliding gap of the gra/jar sliding hole, this high-pressure slurry would flow into the supply chamber and leak to the outside. Since at least the sliding surface portion of the bearing is made of ceramic material, it has excellent wear resistance and can maintain high ball/gage performance over a long period of time.

(2) Since a spool valve is used for each of the suction passage cutoff valve and the discharge passage cutoff valve, foreign matter will not get stuck in the sliding part of each box, and the durability of the valve will be improved. The performance of the slurry pump can be maintained for a long period of time.

Furthermore, in the spool valve, a ceramic material having excellent wear resistance can be used for the valve chamber wall portion and the outer 18 portions of the spool valve body. .

Can be maintained over time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional plan view, FIG. 2 is a partial cross-sectional plan view, and FIG. 3 is a cross-sectional plan view of FIG.
- Ill line sectional view, Figure 4 I''i2F, Figure 1 av I
FIG. 5 is a plan view showing an example of a drive type of a plurality of slurry pumping bogs, and FIG. 6 is a cross-sectional plan view of a main part of a modified example. 1.Inner casing, 2..External casing, 6..
Supply mL 4...pressurizing chamber, 5...sealing tool, 5a...feature//gear hole, 6...gra/jar, 7...driving rod, 9...slurry inlet, 10...cla 1 no. Discharge port, 1
1.Discharge path, 12..Suction path, 15..Inhalation path person []
, 14. Suction passage outlet, 15. Valve chamber, 16. Sugur valve body, 18. Valve closing, ζne, 20. Discharge passage valve chamber, 21.
・Discharge path Sgur valve body, 22...Discharge path closing valve (a)
■1...Suction path cutoff valve, ■2...Discharge path cutoff valve. Patent applicant Yuaki Kaneko

Claims (1)

[Claims] l. A supply chamber 6 and a pressurizing chamber 4 are formed in series in the casing 2, and a plunger sliding hole 5a is formed between the supply chamber 6 and the pressurizing chamber 4, Plunger 6 into plunger sliding hole 5
A is slidably inserted into the pressurizing chamber 4 from the supply chamber 5 so as to move forward and backward, and the driving rod 7 of the plunger B is inserted into the supply chamber 5.
The rod is guided from inside to the outside of the rod sliding hole 8 in the end wall of the supply chamber 5, and at least the sliding surface portion of the outer circumferential surface of the plunger 6 and the inner circumferential surface of the plunger sliding hole 5a is formed of a ceramic material. The slurry suction ports 9 of the casings 1 and 2 are communicated with the supply chamber B, and the slurry discharge port 10 of the casing 2 is communicated with the pressurizing chamber 4 through a discharge passage 11, so that the supply chamber 6 and the pressurizing chamber 4 are connected to each other. The suction passage 16 is connected to the suction passage 15 by a suction passage cutoff valve v1, and the discharge passage 11 is opened and closed by a discharge passage cutoff valve v2.
2 communicates with the supply chamber 6, and the side of the valve chamber 15 communicates with the pressurizing chamber 4 through the suction passage 12, and a spool valve body 16 is slidably inserted into the valve chamber 15 to connect the suction passage. 12 can be opened and closed freely, and the pressure inside the pressurizing chamber 4 can be received by the end face of the spool valve body 16 at the other end side of the valve chamber 15, and the discharge path cutoff valve 2 discharges into the discharge path valve chamber 20. A thriller characterized in that a discharge passage spool valve body 21 is slidably inserted into the discharge passage spool valve body 21 so that the discharge passage 11 can be opened and closed by the discharge passage spool valve body 21.
In the plunger pot for feeding slurry field described in claim 1, the outer circumferential surface portion of the spool valve body 16 of the valve chamber 15 is made of a ceramic material3; In the pushinja pump for feeding slurry according to claim 1 or 2. The chamber wall of the portion of the discharge passage valve chamber 20 that slides with the discharge passage spool valve body 21 and the outer circumferential surface portion of the discharge passage spool valve body 21 are made of ceramic material 4.Claims 1 and 2. In the plunger pump for pumping slurry described in item 2 or 3, the plunger 6 is made of a ceramic material, and the following margins are 2f.