JPH11218075A - Fire resisting material force feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of pulsation by a piston pump and to prevent the occurrence of a break of a fire resisting material. SOLUTION: In a force feed device to effect a force feed of a fire resisting material for the execution of a spray work by a wet fire resisting material, the force feed device comprises a piston pump device 1 to effect force feed of a fire resisting material; and a buffering mechanism 10 to absorb pulsation of a fire-resisting material located in a fire resisting material feed pipe 2 guided from the discharge port of the piston pump device 1 to a spray nozzle 4. This constitution, since a buffering mechanism is arranged in the middle of the feed pipe, prevents the occurrence of pulsation of the fire-resisting material, performs the stable feed of the fire resisting material to a spray nozzle, and performs the excellent execution of a spray work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory material pumping device for spraying refractory material.

[0002]

2. Description of the Related Art For the construction of furnace walls and other refractory structures,
As a kneading and feeding system for a refractory material, a series of operations for kneading and feeding a refractory material can be performed efficiently and stably for a long period of time.
There is a technique disclosed in Japanese Patent Publication No. 38-38.

[0003] The technique described in the above publication discloses a kneaded refractory material discharged from each tube pump by driving a plurality of juxtaposed refractory materials in slurry with water at different rotational phases. Are combined and sent to the spray nozzle. As a result, the pressure pulsation peculiar to the tube pump interferes with each other to prevent the pulsation of the refractory material.

[0004]

However, in the above prior art, a large number of tube pumps must be used in order to prevent pulsation, which is not only uneconomical but also a characteristic of the tube pump as a refractory material. Is low (Max2 MPa), and there is a problem that sufficient pumping cannot be achieved.

[0005] On the other hand, in the field of concrete, there is a piston pump capable of obtaining a large discharge pressure, and a heavy material is pumped. However, this type of piston pump uses two cylinders to perform suction and suction. The discharge is performed alternately, and one of the cylinders starts pumping after the other cylinder has finished pumping.Therefore, the step of connecting the pumping circuit and the pumping cylinder is performed. And the time required for the process will cause pulsation.

Therefore, when this is used for a spray pump for a refractory material, the spraying accuracy of the sprayed surface is deteriorated. In particular, when spraying using an automatic spraying machine, the spraying thickness must be kept constant. Is extremely difficult. Further, when the hardener is added to the nozzle portion, uneven mixing is apt to occur, causing a problem that more hardener is used than necessary, and it could not be used at all for spraying refractory materials.

[0007]

According to the present invention, a pulsation does not occur while using a piston pump, a refractory material can be supplied without interruption, the sprayed thickness can be made uniform, and the mixing ratio of a hardener and the like can be reduced. It is an object of the present invention to provide a refractory material pumping device capable of maintaining a constant accuracy.

[0008] As means for solving the above problems, the present invention provides:
A piston pump device for pumping the refractory material, and a buffer mechanism interposed in a refractory material supply pipe for guiding the refractory material from a discharge port of the piston pump device to a spray nozzle and absorbing a pulsation of the refractory material. Features.

[0009] As means for pumping the refractory material, at least two piston pumps, a sliding plate having a communicating hole opened and aligned with the opening of each cylinder by fixing these piston pumps side by side, A hopper for storing the material, and an opening provided at a position where the hopper is in sliding contact with the slide plate and is aligned with one of the communication holes of the slide plate and is not aligned with the other communication hole. A face plate, a supply port of a refractory material supply pipe that is opened in the face plate, the communication holes can be selectively aligned, and both communication holes can partially overlap and overlap, and the sliding plate is And a driving means for relatively moving the face plate.

If a buffer mechanism for absorbing the pulsation of the refractory material is provided in the middle of the refractory material supply pipe, the pulsation can be prevented even if the refractory material is momentarily interrupted when the sliding plate is moved.

The buffer mechanism surrounds a tube made of an elastic material such as natural rubber, synthetic rubber, or polyurethane, which is connected in the middle of the refractory material supply pipe, and surrounds an outer periphery of a connection area of the tube with a space therebetween. An outer casing air-tightly fitted to the refractory material supply pipe, and pressurized fluid is introduced between the tube and the outer casing to suppress pulsation of the refractory material flowing in the tube. Is preferred. The pressure of the pressure fluid introduced into the buffer mechanism is 3 MPa.
It is preferable to set it in the range of 12 MPa.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. A spray nozzle 4 is connected to a piston pump device 1 via a refractory material supply pipe 2 and a hose 3. A supply pipe 7 for a binder (hardening agent) supplied by a pump 6 is connected, and an air supply pipe 9 for supplying compressed air for blowing from a compressor 8 is connected in the middle of the binder supply pipe 7. The construction is such that compressed air containing a binder is supplied to the spray nozzle 4 so that the binder and the refractory material are mixed and the refractory material is sprayed toward the construction target site.

In the middle of the refractory material supply pipe 2, a buffer mechanism 10 (accumulator) for absorbing the pulsation of the refractory material to be fed is interposed.

As shown in an enlarged sectional view of FIG. 2, the shock absorbing mechanism 10 has a refractory material supply pipe 2 which is separated on the way, and has elasticity of natural rubber, synthetic rubber, polyurethane or the like between its separated ends 2a. Both ends of a tube 11 made of a material having such a material are firmly fitted and fixed. The supply pipe 2 is hermetically fitted to the outer periphery of the separation ends 2a, 2a.

A cylinder 13 of a pressurized fluid, for example, nitrogen gas, is connected to the outer casing 12 via a hose 14 so that the pressurized fluid can be introduced into a space 15 between the tube 11 and the outer casing 12. It has become.

The pressure fluid is not limited to a gas but may be a liquid, and its pressure is preferably about 3 MPa to 12 MPa.

The piston pump device 1 includes a sliding plate 16
Two piston pumps 17A, 17 fixed side by side on top
B, and these piston pumps 17A and 17B are provided with a cylinder portion 18 for sucking a refractory material,
Piston 19 that controls the suction and discharge of refractory material into the interior
And a pressure feeding cylinder 20 as driving means for reciprocating the piston 19 over a predetermined stroke.

The sliding plate 16 has communication holes 21A and 21B which are aligned with the open ends of the cylinder portions 18 and 18 of the piston pumps 17A and 17B. The sliding plate 16 is made of a refractory material. Sliding contact is made on a face plate 23 fixed on the upper part of the hopper 22 for storing.

The face plate 23 has openings 24A and 24B which are aligned with one of the communication holes 21A and 21B of the sliding plate 16 and are not aligned with the other.
The inside of the hopper 22 and one of the piston pumps 17A, 17B are connected to each other through A, 24B.

A supply port 25 at the upper end of the refractory material supply pipe 2 is opened between the openings 24A and 24B. The supply port 25 is connected to the communication hole 21 of the sliding plate 16.
A and 21B have an opening area in which a part of the opening can be overlapped, and the opening timing is such that when the discharge of the refractory material from one communication hole 21A (or 21B) advances by about 80%, the communication on the other side is started. The hole 21B (or 21A) is formed so as to start discharging.

The sliding plate 16 is configured to reciprocate over a predetermined stroke by a hydraulic cylinder 26 as a driving means.

The driving means for the sliding plate 16 and the driving means for the pistons 19, 19 of the piston pumps 17A, 17B are both shown by hydraulic cylinders 20, 26, but these are a motor-driven crank mechanism or the like. Mechanical means.

Next, the operation of the above embodiment will be described with reference to FIG. FIG. 3A shows one piston pump 17A.
Is the discharge process of the refractory material, and the other piston pump 1
7B shows a state during suction. In this state, the cylinder portion 18 of the piston pump 17A during discharge is aligned with the supply port 25 through the communication hole 21A of the sliding plate 16 and pressurizes the refractory material to the spray nozzle 4 through the refractory material supply pipe 2. The cylinder 18 of the other piston pump 17B is aligned with the opening 24B of the hopper 22 through the communication hole 21B, and sucks the refractory material in the hopper 22 into the cylinder 18.

When the discharge from one piston pump 17A advances by about 80%, the suction of the other piston pump 17B stops (FIG. 3B). Then, the hydraulic cylinder 26 extends and the sliding plate 16 slides to the left in the figure, and a part of the communication holes 21A and 21B of the sliding plate 16 overlaps with the supply port 25 so as to overlap with each other. The discharge of the remaining amount (about 20%) from the pump 17A and the discharge from the other piston pump 17B are simultaneously performed, and the refractory material is supplied from both the piston pumps 17A and 17B simultaneously through the supply port 25. It is supplied to the pipe 2 and pressure-fed (FIG. 3C).

Subsequently, the sliding plate 16 further moves to the left,
The cylinder portion 18 of one piston pump 17A is completely in communication with the inside of the hopper 22 and starts suction, and the cylinder portion 18 of the other piston pump 17B is completely aligned with the supply port 25 and continuously discharges the refractory material. (FIG. 3
(D)).

By repeating the above operation alternately, the refractory material is discharged and fed without interruption, and the refractory material is constantly supplied to the spray nozzle 4 and rides on the compressed air together with the binder from the binder tank 5 to the location to be sprayed. Can be sprayed with fireproof material.

The buffer mechanism 1 is provided in the middle of the refractory material supply pipe 2.
0 is provided, even if the discharge of the refractory material is interrupted even for a moment when the pumping is switched by the piston pumps 17A and 17B of the piston pump device 1, the pressure fluid applied to the outer periphery of the tube 11 of the buffer mechanism 10 is used. The pulsation is absorbed by the pressure, and it is possible to prevent the pressure from being supplied to the spray nozzle 4.

FIGS. 4 and 5 show the difference in the discharge state of the refractory material between the one according to the present invention (FIG. 4) and the conventional dual piston pump (FIG. 5). While the discharge operation shifts from the A cylinder to the B cylinder and from the B cylinder to the A cylinder, breaks a, a,... Of the refractory material occur, and intermittent discharge occurs, so that the refractory material cannot be continuously supplied. According to the present invention, at the time of the transition of the discharge operation between the A cylinder and the B cylinder, the discharge is always performed for the time shown by b in FIG. A slight change in the discharge amount c generated at the time of the transition of the discharge operation also becomes flat by passing through the buffer mechanism 10, and a fixed amount of the refractory material is always supplied to the spray nozzle 4.

[0029]

As described above, according to the first aspect of the present invention, even if the refractory material is pumped using a piston pump capable of obtaining a large discharge pressure, a buffer mechanism is provided in the supply pipe. Therefore, the pulsation of the refractory material can be prevented, the refractory material can be stably supplied to the spray nozzle, and good spraying can be performed.

According to the second aspect of the present invention, even when the refractory material is alternately sucked and discharged by a plurality of piston pumps, the discharge operation is performed repeatedly when the operation of the piston pumps is alternated. As a result, the supply of the refractory material is not stopped, and a constant amount of the refractory material can be always pumped to the spray nozzle.

If a buffer mechanism is interposed in the middle of the refractory material supply pipe by the piston pump device using the plurality of piston pumps, the discharge of the refractory material may be interrupted even momentarily when the operation of the piston pump is changed. Can also absorb the pulsation accompanying it and supply it to the spray nozzle.

Further, the buffer mechanism is connected to a tube made of an elastic material in the middle of the refractory material supply pipe, and is surrounded by an outer casing to introduce a pressurized fluid into the inside. In this case, pulsation of the refractory material can be prevented with a simple configuration.

Since the pulsation of the refractory material is prevented in this manner, even if automatic spraying is performed, there is no variation in the work thickness, uniform spraying work can be performed, and a binder (hardening agent) mixed with the fireproof material can be used. )), The uniform application can be performed, and the amount of the binder used can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing an example of a buffer mechanism in FIG.

FIGS. 3A to 3D are explanatory views showing the operation of the piston pump device in FIG. 1;

FIG. 4 is a graph showing a state of discharging a refractory material according to the embodiment of FIG. 1;

FIG. 5 is a graph showing a discharge state by a conventional piston pump device.

[Explanation of symbols]

 Reference Signs List 1 piston pump device 2 refractory material supply pipe 3 hose 4 spray nozzle 5 binder tank 6 pump 8 compressor 10 buffer mechanism (accumulator) 11 tube 12 outer housing 13 cylinder 16 sliding plate 17A, 17B piston pump 18 cylinder portion 19 piston Reference Signs List 20 Cylinder for pressure feed (drive means) 21A, 21B Communication hole 22 Hopper 23 Face plate 24A, 24B Opening 25 Supply port 26 Hydraulic cylinder (drive means)

[Procedure amendment]

[Submission date] March 29, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008] As means for solving the above problems, the present invention provides:
A piston pump apparatus for pumping the refractory material, has androgynous and a buffer mechanism for absorbing the pulsation of refractory material is interposed refractory material supply pipe for guiding the refractory material to the blast nozzle from the discharge port of the piston pump system , Its piston pump device
Is a slide plate having at least two piston pumps, a slide plate having a communication hole opened and aligned with the opening of each cylinder portion by fixing the piston pumps in parallel, a hopper for storing a refractory material, and a hopper for storing the refractory material. A face plate having an opening at a position that is provided in a position that is in non-alignment with the other communication hole when aligned with one of the communication holes of the sliding plate in sliding contact with the sliding plate;
A supply port of a refractory material supply pipe that is opened to the face plate, the communication holes can be selectively aligned, and both communication holes can partially overlap and overlap, and the sliding plate is attached to the face plate. And a driving means for relatively moving the driving means.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

[0030] In particular also to perform the suction and discharge alternately refractory material by a plurality of piston pumps, it is to duplicate upon replacement of the piston pump operation occupies made the discharge operation
No constantly stopping the supply of refractory material so ∎ it can, it is possible to always pumping a certain amount of refractory material to the blast nozzle.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

Since the buffering mechanism is interposed in the middle of the refractory material supply pipe by the piston pump device using the plurality of piston pumps, the discharge of the refractory material may be interrupted even momentarily when the operation of the piston pump is changed. Even if it is, the pulsation accompanying it can be absorbed and supplied to the spray nozzle.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

Further, the buffer mechanism is connected to a tube made of an elastic material in the middle of the refractory material supply pipe as in claim 2 , and the periphery thereof is surrounded by an outer casing so that a pressurized fluid is introduced therein. In this case, pulsation of the refractory material can be prevented with a simple configuration.

Claims (5)

[Claims] 1. A pumping device for pumping a refractory material for spraying with a wet refractory material, wherein a piston pump device for pumping the refractory material, and the refractory material is guided from a discharge port of the piston pump device to a spray nozzle. A refractory material pumping device, comprising: a buffer mechanism interposed in the refractory material supply pipe to absorb pulsation of the refractory material. 2. A pumping device for pumping a refractory material for spraying with a wet refractory material, wherein at least two piston pumps are fixed side by side and aligned with openings of respective cylinders. A sliding plate having an open communication hole, a hopper for storing a refractory material, and a sliding hopper provided in the hopper, which is in sliding contact with the sliding plate and which is aligned with one of the communication holes of the sliding plate, A face plate having an opening at a position that is not aligned with the communication hole, and a fireproof opening that is opened in the face plate so that the communication hole can be selectively aligned and both communication holes can partially overlap and overlap. A refractory material pumping device, comprising: a piston pump device including a supply port of a material supply pipe and driving means for moving the sliding plate relative to the face plate. 3. The refractory material pumping system according to claim 2, wherein a spray nozzle is connected to a tip of said refractory material supply pipe, and a buffer mechanism for absorbing a pulsation of the refractory material is provided at an intermediate portion of said supply pipe. apparatus. 4. The buffer mechanism surrounds a tube made of an elastic material such as natural rubber, synthetic rubber, or polyurethane, which is connected in the middle of the refractory material supply pipe, and an outer periphery of a connection range of the tube with a space therebetween. An outer casing air-tightly fitted to the refractory material supply pipe so as to suppress the pulsation of the refractory material flowing in the tube by introducing a pressure fluid between the tube and the outer casing. The refractory material pumping device according to claim 1 or 3, wherein the device is provided. 5. The refractory material pumping apparatus according to claim 1, wherein a pressure of the pressure fluid introduced into the buffer mechanism is in a range of 3 MPa to 12 MPa.