JP4129806B2 - Method and apparatus for constructing casing for rotary pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and apparatus for constructing a rotary pump casing, and more particularly to a rotary pump casing suitable for constructing a casing of a spiral pump used in a rainwater pump station, a sewage pump station, and an agricultural water pumping station. The present invention relates to a construction method, a construction position centering method, and a construction apparatus.
[0002]
[Prior art]
The casing of the spiral pump used in the rainwater pumping station, the sewage pumping station, and the agricultural water pumping pump station is formed by finishing a semi-cylindrical groove on a concrete frame with mortar or the like. For such a pump casing, a pumping station is configured by installing so that half of the spiral blade is filled. This type of spiral blade body has a blade axis length of about 20 m, a diameter of about 3 m, and an inclination angle of about 30 degrees. Therefore, the pump casing is also constructed with a predetermined inclination angle, and the outer edge of the pump blade It is necessary to finish the mortar with high accuracy so that the gap between the mortar is about 5 to 10 mm.
[0003]
To make a casing for a conventional spiral pump, first attach the spiral blade body to the roughly finished concrete frame, and then install the upper and lower parts. After setting the blade body, start the mortar finishing work. It has become.
[0004]
The conventional method of making a casing is to attach a round bar, flat bar, etc. to the spiral blade body, attach a speed reducer and motor to the spiral blade body, and rotate the spiral blade body to finish the mortar. is there.
[0005]
[Problems to be solved by the invention]
However, although the above conventional method can produce a casing with high accuracy, it requires a permanent speed reducer that rotates the spiral blade body and a temporary speed reducer or motor that adjusts the rotation speed, and therefore the construction period is long. was there. Also, the work with mortar finishes is not only difficult to secure a scaffold, but also the work after the installation of the spiral blade body, so the finish had to be done manually while rotating the blade body . Further, the main body of the spiral blade at the pumping station has a length of almost 20 m, a diameter of about 3 m, and a weight of 20 tons. When such a spiral blade main body is installed, axial deflection occurs, and there is no method other than after the blade main body is installed in order to construct the casing with a certain clearance.
Such a situation is not limited to the spiral pump, but is a problem common to the structure of finishing the casing of the rotary pump.
[0006]
The present invention pays attention to the above-mentioned conventional problems, and can easily adjust centering of the through shaft core of the rotary pump regardless of the condition of the concrete casing for the pump casing, and easily and accurately adjust the casing surface. It aims at providing the method and construction apparatus which can perform finishing construction.
[0007]
[Means for Solving the Problems]
When constructing the casing of the rotary pump, a piano wire stretched along the shaft axis of the rotary pump is passed through the bearing shaft of the construction carriage arranged so as to cross the pump shaft, and the rotary pump is passed through the piano wire. A tension that generates a bending amount corresponding to the design deflection of the rotating pump is added, and the piano wire is adjusted by the positioning means of the construction carriage so that the piano wire is at the center of the bearing shaft. A workbench frame in which a swing arm which is rotatable around an axis centered between a pair of arms on the inner side with a pair of arms and provided with a chevron-shaped copying iron at the tip along a casing groove at the bottom of the carriage the striking設面of the casing inner surface to mimic according pivot arc and construction by pivoting from the inside of the pivot a of this work by the working carriage It is obtained characterized by sequentially carried out while the arm is positioned moves along the through axis of the pump.
[0009]
Moreover, the construction apparatus for constructing the casing of the rotary pump according to the present invention has a construction carriage that can be moved along the through-shaft axis of the rotary pump, and the carriage is provided with a pair of arms. A tool that is rotatable about the through-core of the rotary pump sandwiched inside, and a workbench frame that is inside the turning tool that pivots and is framed along the casing groove at the bottom of the carriage The tool has a swivel arm and a trowel provided at the tip of the swivel arm so that the casting surface of the casing inner surface can be copied from the inside of the workbench frame according to the swivel arc. the positioning device to affix said carriage to fit the rotation center of the tool to the rotary pump through axis is characterized by comprising the bogie. In this case, the length of the swivel arm provided with the copying iron can be adjusted, or the counterweight can be mounted on the opposite side of the swivel arm from the mounting side of the copying iron.
[0010]
[Action]
According to the above configuration, the center of rotation of the turning arm is set along the through shaft of the rotary pump, and the turning arm is turned. Thereby, the trowel at the tip of the arm can be finished by copying the placement surface. To align the turning center of the swivel arm with the pump threading axis, for example, use a construction carriage and move it along the threading axis of the pump. It becomes. In order to make the rotation arm rotation center of the construction carriage coincide with the pump passage shaft core, a wire is stretched along the pump passage shaft core, and a guide passage through which the wire passes is set in the turning carriage. In the case of movement, it is only necessary to prevent the wire from being removed from the guide passage, and it is only necessary to fix the wire by positioning means provided at both ends of the carriage at the work site. As a result, the centering operation at the center of turning can always be easily performed. By making the length of the swivel arm variable, not only the finished surface, but also the roughing, medium hitting, and finishing can be processed with the same equipment, which makes the thickness of each layer uniform. it can.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a concrete embodiment of a construction method and a construction apparatus for a rotary pump casing according to the present invention will be described in detail with reference to the drawings.
FIG. 1: is the figure which looked at the construction apparatus of the mortar casing for rotary pumps which concerns on embodiment from the front in the construction location. 2 and 3 are a plan view and a front view of the apparatus. FIG. 4 is a schematic configuration diagram of the spiral pumping station, and FIG. 5 is a plan view and a cross-sectional view illustrating the configuration of the mortar casing.
[0012]
This embodiment is applied to construction of a mortar pump casing in a spiral pumping station. As shown in FIG. 4, the spiral blade body 10 is disposed to be inclined to the concrete housing 12 whose inclination angle is set to approximately 30 degrees, which has an overall length of approximately 20 m and a diameter of approximately 3 m. ing. The spiral blade body 10 is supported by the upper bearing 14 and the lower bearing 16 so that the lower part is submerged. The spiral blade body 10 is housed in a pump casing 18 formed with an inclination angle of 30 degrees and driven to rotate. The water is pumped from the lower inflow channel side to the discharge channel side at the upper position.
[0013]
As shown in FIG. 5, the pump casing 18 is formed in a semicircular arc shape on the inclined flat surface portion of the concrete housing 12, and has a total length of about 20 m and a diameter of 3 m in accordance with the spiral blade body 10. Built as a semicircular groove. The construction process of the pump casing 18 is roughly as follows. A roughing layer 22 and a medium striking layer 24 are placed in the casing groove 20 initially formed in the concrete housing 12, and a finishing mortar layer 26 is placed on the surface portion thereof. As a result, the mortar casing layer is finally finished.
[0014]
The construction apparatus 30 is installed so that the side road 28 formed as a notch step portion at both side edge portions of the opening corresponding to the pump casing 18 can be moved in the direction of the pump axis using the traveling path. This construction apparatus 30 has a construction carriage 32 formed so as to cross the pump shaft core, and has rolling rollers 34 at both ends of the carriage 32 so that the side road 28 can be traveled. Yes. The rolling rollers 34 are arranged at the four corners of the carriage 32 formed as a rectangular frame, and are each composed of a floor surface rolling roller 34A and a side surface rolling roller 34B. Further, centering jack bolts 36 as positioning means for determining the height and the horizontal direction of the carriage 32 are provided at the four corners of the carriage 32 while stopping the construction carriage 32 at an appropriate position. The centering jack bolt 36 also includes a downward jack bolt 36D and a lateral jack bolt 36S, and the height and direction of the carriage 32 can be arbitrarily set by adjusting the amount of protrusion of the bolt.
[0015]
The construction carriage 32 is arranged so as to cross the pump casing 18, and a bearing shaft 38 is attached to the central portion of the carriage 32 along the through-core C of the spiral blade body 10. The bearing shaft 38 has a through-hole, and a wire passed between the upper bearing 14 and the lower bearing 16 so as to coincide with the through shaft core C (see FIG. 4) of the spiral blade body 10 in advance. The piano wire 40 is inserted and used as a centering reference point.
[0016]
Here, the setting of the piano wire 40 is performed as follows. As described above, the blade body 10 of the spiral pump to be constructed has a general dimension of 20 m in length and 3 m in diameter, and a weight of 20 tons. As for the main body 10, an axial center will bend about 3 mm as a design value. Therefore, the upper and lower bearings 14 and 16 are caused to hold the piano wire 40, and a tension is applied so that the amount of bending becomes a design value of 3 mm. Alternatively, the piano wire 40 is selected such that the same amount of bending is generated by applying a constant tension. Thus, the piano wire 40 passed between the upper and lower bearings is on a line that coincides with the through-core of the spiral blade body 10. Therefore, the piano wire 40 is passed through the bearing shaft 38 of the construction carriage 32, the upper and lower ends thereof are connected to the upper and lower bearings 14 and 16, and a predetermined tension is applied. The piano wire 40 coincides with the center of the bearing shaft 38. If the centering jack bolt 36 is adjusted as described above, the centering adjustment can be performed with the spiral blade body 10 on which the construction carriage 32 is to be installed.
[0017]
In the construction carriage 32 that can be centered and adjusted in this way, a pair of swivel arms 42 with the bearing shaft 38 serving as the centering reference as the center of rotation are attached to the front and rear of the carriage 32, and the lower end thereof is attached to the lower end. The tool which makes a U-shape is comprised by attaching 44. As a whole, the tool is swingable and swivel so that the trolley 44 traces the inner surface of the mortar casing with the carriage 32 sandwiched between the arms 42. In this embodiment, the iron 44 is made of angle steel, and the central bent portion is the main body for copying the mortar. The revolving arm 42 is provided with a telescopic mechanism 46, respectively. This is a double shaft structure whose length is variable by an adjusting pin 48, and the insertion pitch of the adjusting pin 48 is set so that the length can be adjusted according to the thickness of each layer required for the pump casing. A counterweight 50 is attached to the end of the turning arm 42 opposite to the side where the iron 44 is attached, so that the turning operation of the iron 44 can be easily performed.
[0018]
A work table frame 52 is provided below the construction carriage 32 so as not to interfere with the turning operation of the iron 44. This is for the operator to get inside to operate the trowel 44 and to prevent the operator from stepping on the construction surface that has not been cured.
[0019]
Construction of the pump casing 18 performed using the construction apparatus 30 having such a configuration is performed as follows. The construction apparatus 30 is suspended and moved by a crane wire or the like, and the casing groove 20 is formed in the concrete housing 12, so that the rolling roller 34 is lowered so as to be placed on the side road 28 across this. This position is the upper end side of the casing groove 20. Then, it is temporarily fixed using a centering jack bolt 36, and a piano wire 40 is passed through the bearing shaft 38 along the through-shaft core C of the spiral blade body 10. The piano wire 40 is set to follow the design deflection of the spiral blade body 10 by applying a tension of about 40 kg. After this work, the centering jack bolt 36 of the construction apparatus 30 is adjusted, and the height and the horizontal positioning are performed so that the piano wire 40 is at the center of the bearing shaft 38. This makes it possible to start construction.
[0020]
The length of the telescopic mechanism portion 46 of the turning arm 42 is set to the maximum, and the turning circle locus of the iron 44 is adjusted so as to match the rough hitting dimension. Cement is placed on the inner surface of the casing groove 20, and the swivel arm 42 is swung and swung so that the surface is smoothed with a trowel 44 so that the surface has a construction size. A mesh is stretched on the surface to maintain the shape, the construction carriage 30 is lowered along the casing groove 20, and the same operation is repeated until the lower end. Thereby, the rough striking layer 22 is completed. Next, it is returned to the upper end position, the length of the swivel arm 42 is shortened by the thickness of the middle striking layer, and the middle striking layer 24 is sequentially applied from above. Finally, the surface is finished by following the same repeated operation from above to place the finishing mortar layer 26 and follow the turning circle by the trowel 44.
[0021]
In such a construction method using the construction apparatus 30, the centering work of the construction apparatus 30 can be reliably performed regardless of the condition of the concrete frame 12. Further, since the length of the swivel arm 42 can be adjusted, the entire process of roughing, medium hitting and finishing up to the mortar finishing of the pump casing 18 can be completed with one construction device. Moreover, since the thickness of each layer 22, 24, 26 can be applied uniformly, the finishing accuracy is very good. Further, the swinging operation of the iron 44 can be easily performed by providing the counterweight 50.
[0022]
In particular, in this embodiment, since the piano wire 40 adjusted so that the construction carriage 30 is aligned with the pump-through shaft core is used as a guide, the construction accuracy can be increased while being extremely simple. For this reason, the tolerance of the gap between the rotating circle of the spiral blade body 10 and the finished surface of the pump casing 18 can be finished with an accuracy of 5 mm or less, and this can be set uniformly over the entire surface. High pumping efficiency can be obtained.
[0023]
In the above-described embodiment, an example in which angle steel is used as the iron 44 has been described. However, as long as other copying work can be performed, it is possible to freely change to appropriate means such as a roller or a trowel.
In the above embodiment, mortar is used as a finishing material. However, any material that can be solidified later with other materials such as plastic fats and oils may be used.
[0024]
【The invention's effect】
As described above, according to the present invention, it is a construction device for constructing a casing of a rotary pump, and has a construction cart that can be moved along the through-shaft core of the rotary pump. Is a tool that can be rotated around a shaft axis of the rotary pump with the carriage sandwiched between a pair of arms, and an inner side of the turning tool that rotates, and a casing groove in a lower part of the carriage The tool has a swivel arm and a copying iron provided at the tip of the swivel arm, and the casting surface of the inner surface of the casing follows the swivel arc from the inside of the workbench frame. The position of the tool is provided with a position adjusting tool for fixing the carriage by aligning the rotation center of the tool with the rotary pump through shaft, and the casing of the rotary pump is installed. At this time, a piano wire stretched along the through shaft core of the rotary pump is passed through the bearing shaft of the construction carriage arranged so as to cross the pump shaft center, and this piano wire corresponds to the design deflection of the rotary pump. A tension for generating a bending amount is applied, and the piano wire is adjusted to be at the center of the bearing shaft by the positioning means of the construction carriage so as to center the passage line of the rotary pump. The swivel arm, which is rotatable about the axis centered on the inner side of the arm and provided with a chevron-shaped copying iron at the tip, is swung from the inside of the work table frame framed along the casing groove at the bottom of the carriage. The installation surface of the inner surface of the casing is copied according to the turning arc, and this operation is performed along the shaft of the pump with the construction carriage. Since the sequentially performed while moving the effect capable of applying the high precision of the pump casing easily and quickly can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a construction apparatus for a rotary pump mortar casing according to an embodiment as seen from the front at a construction site.
FIG. 2 is a plan view of the apparatus.
FIG. 3 is a front view of the apparatus.
FIG. 4 is a schematic configuration diagram of a spiral pumping station.
FIG. 5 is a plan view and a cross-sectional view showing a configuration of a mortar casing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Spiral blade body 12 Concrete housing 14 Upper bearing 16 Lower bearing 18 Pump casing 20 Casing groove 22 Rough striking layer 24 Middle striking layer 26 Finishing mortar layer 28 Side road 30 Construction device 32 Construction cart 34 Rolling roller 36 Centering jack bolt 38 Bearing shaft 40 wire (piano wire)
42 Rotating arm 44 Trowel 46 Telescopic mechanism 48 Adjustment pin 50 Counterweight

Claims (4)

When constructing the casing of the rotary pump, a piano wire stretched along the shaft axis of the rotary pump is passed through the bearing shaft of the construction carriage arranged so as to cross the pump shaft, and the rotary pump is passed through the piano wire. A tension that generates a bending amount corresponding to the design deflection of the rotating pump is added, and the piano wire is adjusted by the positioning means of the construction carriage so that the piano wire is at the center of the bearing shaft. A workbench frame in which a swing arm which is rotatable around an axis centered between a pair of arms on the inner side with a pair of arms and provided with a chevron-shaped copying iron at the tip along a casing groove at the bottom of the carriage the striking設面of the casing inner surface to mimic according pivot arc and construction by pivoting from the inside of the pivot a of this work by the working carriage Method of constructing a casing for a rotary pump and performing beam successively while position moving along the through axis of the pump.   A construction apparatus for constructing a casing of a rotary pump, having a construction carriage that can be moved along a through shaft core of the rotary pump, and sandwiching the carriage inside by a pair of arms. A tool that is rotatable about a through-shaft core of the rotary pump, and a workbench frame that is inside the turning tool that pivots, and that is framed along a casing groove at the bottom of the carriage, The tool has a swivel arm and a copying iron provided at the tip of the swivel arm, and the casting surface of the casing inner surface can be copied and constructed from the inside of the workbench frame according to the swivel arc. An apparatus for constructing a casing for a rotary pump, wherein the carriage is provided with a position adjusting tool for fixing the carriage in accordance with the rotary pump through shaft.   The rotary pump casing construction apparatus according to claim 2, wherein a length of the swivel arm provided with the copying iron is adjustable.   The rotary pump casing construction apparatus according to claim 2, wherein a counterweight is attached to the revolving arm on the opposite side of the copying iron.

Images