Levelness measurement device for base plate support seat for hydraulic machine, and method for adjusting and installing base plate support seat using the same

Abstract

To simply and accurately measure a levelness of a base plate support seat even when installing hydraulic machines such as large vertical pumps for lifting, and drainage facilities and hydraulic power generators.SOLUTION: A levelness measurement device for a base plate support seat on which a base plate of a hydraulic machine is installed, and that measures a levelness of a base plate support seat having an opening part, comprises: a plurality of straight edges arranged at intervals in a circumferential direction on the base plate support seat; a plurality of digital levels that are placed at approximately a center of each upper surface of the straight edges, and measure the levelness of the base plate support seat via the straight edges; a computer that collects data on the levelness of the base plate support seat from each digital level; and a monitor that displays the levelness of the base plate support seat from the computer.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a level measuring device for measuring the level of a base plate receiving seat for installing a base plate of a hydraulic machine such as a vertical pump or a hydraulic generator in a pumping and drainage facility, and a method for adjusting and installing the base plate receiving seat using the same.

Background Art

[0002] Conventionally, in water treatment facilities such as pumping and drainage facilities, sewage treatment facilities, factories, and drainage facilities, when installing a hydraulic machine such as a vertical pump with a vertical pipe, this hydraulic machine is usually installed by fixing a base plate in a mounted state on a base plate receiving seat provided on a foundation. In this case, in order to accurately install the hydraulic machine in a predetermined installation space, a high levelness is required for the mounting surface on the upper surface side of the base plate receiving seat. Therefore, this type of base plate receiving seat needs to be attached to the foundation with the levelness of its mounting surface accurately adjusted.

[0003] In Patent Document 1, when installing a base plate for installing a pump on a base plate receiving seat, after installing the base plate so that its upper surface becomes horizontal from a tilted state, the gap generated between this base plate and the base plate receiving seat, which is the foundation, is filled with an embedding material made of a resin material, and the base plate and the base plate receiving seat are fixed with mounting bolts, so as to try to install the base plate while ensuring the levelness with respect to the base plate receiving seat. Note that after the horizontal state of the base plate is adjusted, it is fixed to the foundation (base plate receiving seat) with anchor bolts or the like, and pumps are installed on the mounting surface of this base plate and fixed with bolts or the like.

[0004] When measuring the level of the base plate receiver placed on the foundation, a level is generally often used. In FIG. 5, an example of measuring the level of the base plate receiver with a level is shown in a plan view. On the installation floor 1 which is the foundation where the pump is installed, an opening 2 is provided for inserting the pump and piping. Around the opening 2, a base plate receiver 3 for mounting the pump is placed, and the level of the mounting surface of this base plate receiver 3 is measured.

[0005] When measuring the level, in the plan view of FIG. 6, first, a straight edge 4 is placed on the upper surface of the base plate receiver 3 so as to span, for example, in the vertical direction through the center of the opening 2, and a level 5 is placed at the center of this straight edge 4. Then, while visually observing the position of the bubble of this level 5 from the outside, the level in the vertical direction of FIG. 6 is measured.

[0006] Subsequently, the straight edge 4 is spanned in the left - right direction orthogonal to the vertical direction of FIG. 6, and by visually observing the bubble of the level 5 at the center of this straight edge 4 from the outside in the same manner as in the vertical direction, the level in the left - right direction is measured. The order of these measurements in the vertical and horizontal directions may be reversed, or the orientation may be shifted from up - down - left - right, but in any case, by performing at least two measurement operations, the levels in the orthogonal directions with different orientations of the base plate receiver 3 are measured, and the level of this base plate receiver 3 is adjusted.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, when measuring the levelness of the base plate support seat 3 by the conventional measurement operation as shown in FIG. 6, the bubble level 5 placed at the center of the straight edge 4 spanned across the center of the opening 2 must be visually confirmed. However, as the pump or the like becomes larger and the diameter of the opening 2 increases, the distance from the visual position on the outer peripheral side of the opening 2 to the level 5 becomes longer, making it difficult to visually recognize from the outside, and it becomes even more difficult to confirm the exact position of the bubble. Therefore, as the opening 2 has a larger diameter, it is likely to lead to a decrease in the accuracy of the measurement operation.

[0009] In addition to this, as the diameter of the opening 2 increases, the straight edge 4 spanned across the opening 2 also becomes longer, making its handling difficult. Moreover, in FIG. 5, measurement operations in at least two directions, the vertical direction and the horizontal direction, are required, and each time, the straight edge 4 must be replaced and the orientation position adjusted multiple times, so the number of work steps increases and the work becomes overly complicated.

[0010] Thus, when measuring the levelness in two separate operations, for example, when adjusting the levelness of the base plate support seat 3 using an adjustment method such as that in Patent Document 1, the levelness in the vertical and horizontal directions in the plan view of the base plate support seat 3 needs to be adjusted while measuring them respectively. Therefore, it is difficult to simultaneously perform the adjustment operations for the levelness in these four directions. For these reasons, at the site or the like, especially when installing a large vertical shaft pump for pumping and draining water, a hydraulic machine such as a hydraulic generator, there is a demand for the development of a levelness measuring device that can measure the levelness in four directions of the mounting surface of the base plate support seat 3 at one time and can simultaneously adjust the levelness of the base plate support seat 3 according to the measurement results.

[0011] The present invention has been made in view of such circumstances, and aims to simply and accurately measure the levelness of the base plate support seat even when installing a large vertical shaft pump for pumping and draining water, a hydraulic machine such as a hydraulic generator.

Means for Solving the Problems

[0012] The device for measuring the levelness of the base plate receiving seat for installing a hydraulic machine according to the present invention is a device for measuring the levelness of a base plate receiving seat having an opening, on which the base plate of the hydraulic machine is installed, and includes a plurality of straight edges arranged at intervals in the circumferential direction on the base plate receiving seat, a plurality of digital levels placed at substantially central positions on the upper surfaces of these straight edges and measuring the levelness of the base plate receiving seat through these straight edges, a computer that collects data on the levelness of the base plate receiving seat from each of these digital levels, and a monitor that displays the levelness of the base plate receiving seat from this computer.

[0013] By arranging each straight edge on the base plate receiving seat, collecting the levelness measured by the digital levels on each straight edge into the computer, and then displaying it on the monitor, it is possible to confirm the levelness in each direction of the base plate receiving seat via the monitor without directly visually observing each level on the base plate receiving seat. Since there is no need to directly visually recognize the digital in this way, the operation of measuring the levelness becomes easier. Even when the opening has a large diameter, the installation and confirmation of the digital levels are simple, and the levelness in each direction can be accurately adjusted while visually recognizing the levelness of the base plate on the monitor.

[0014] In the device for measuring the levelness of the base plate receiving seat for installing a hydraulic machine according to the present invention, it is preferable that four each of the straight edges and the digital levels are provided.

[0015] In that case, it is preferable that the four straight edges are respectively arranged in directions in which the length directions are orthogonal to four directions, namely, the flowing water direction of the hydraulic machine on the base plate receiving seat and the direction orthogonal to this flowing water direction.

[0016] By arranging the straight edge in the flowing water direction of the hydraulic machine, the levelness in four directions based on the flowing water direction side of the base plate receiving seat can be adjusted, and it becomes possible to measure the high-precision levelness of the base plate receiving seat. Therefore, when installing the hydraulic machine on the base plate receiving seat, the hydraulic machine can be installed with high precision while keeping the flowing water direction horizontal.

[0017] In the levelness measuring device for the base plate receiving seat for installing a hydraulic machine according to the present invention, it is preferable that the computer causes the monitor to display the measurement values of each of the plurality of digital levels. By checking the monitor, the measurement values of all the digital levels can be grasped at once, and the work becomes easier.

[0018] In the levelness measuring device for the base plate receiving seat for installing a hydraulic machine according to the present invention, it is preferable that the computer has a function of displaying a warning on the monitor when the levelness of the base plate receiving seat is greater than a predetermined reference value.

[0019] When reading the levelness numerically, if a warning is displayed, it is possible to prevent the operator from misreading the measurement value and accurately confirm the levelness. In addition, the operator can work while checking the warning display, which facilitates the work and enables the measurement work and adjustment work of the levelness to be performed in a short time.

[0020] In the levelness measuring device for the base plate receiving seat for installing a hydraulic machine according to the present invention, it is desirable that the digital level has a communication function of wirelessly communicating the measured levelness to the computer.

[0021] By wirelessly transmitting the measurement result of the digital level to the computer via the communication function, it is not necessary to route connection cables, etc., and the work can be made easy and safe.

[0022] The installation method of the base plate seat for hydraulic machinery of the present invention includes a base plate seat on which a base plate of hydraulic machinery is installed, a plurality of straight edges, a plurality of digital levels arranged on these straight edges, a computer that collects the level data from these digital levels, and a monitor capable of displaying the level. The straight edge with the digital level placed thereon is arranged on the base plate seat, and while the measured value of the level collected from the digital level is displayed on the monitor, the level of the base plate seat is adjusted.

[0023] According to this installation method of the base plate seat, since the straight edge and the digital level are arranged at predetermined positions and the level of the base plate seat can be confirmed through the monitor, even if the opening has a large diameter, it is easy to visually recognize the level of the base plate seat through the monitor connected to the computer, and the base plate seat can be installed with high precision by adjusting the level. As a result, as for hydraulic machinery such as pumps, motors connected to these pumps, or water wheels for hydraulic power generation and generators connected to them, the level can be ensured and they can be accurately installed.

Advantages of the Invention

[0024] According to the present invention, since the operation of adjusting the level of the base plate seat becomes easy, the base plate seat can be easily installed while ensuring a high level, and in a predetermined piping space such as vertical piping, the hydraulic machinery can be accurately attached to the base plate seat, and the functionality of the hydraulic machinery can be fully exerted.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0026] Hereinafter, embodiments of the level measuring device for the base plate receiving seat for installing a hydraulic machine of the present invention and the adjustment and installation method of the base plate receiving seat will be described with reference to the drawings. (Structure of the level measuring device) The level measuring device 10 in this embodiment is a device for measuring the level of the base plate receiving seat 12 on which a vertical shaft axial flow pump (hereinafter simply referred to as a pump) 11 is installed as an example of a hydraulic machine. As shown in FIG. 1, it includes an instrument composed of four straight edges 13, four digital levels 14, a personal computer (hereinafter simply referred to as a computer) 15, and a monitor 16.

[0027] The base plate receiving seat 12 for installing the pump 11 is mounted on a foundation (concrete) 20, and this foundation 20 is constructed with a predetermined level ensured using materials such as concrete, and an opening hole 21 is formed in a vertically penetrating state.

[0028] The base plate receiving seat 12 has an annular support portion 18 for supporting the pump 11 integrally formed at the center of the flat plate portion 17, and an opening 19 is formed in a vertically penetrating state inside the support portion 18. The upper surface 18a of the support portion 18 is formed in a planar shape. In a state where this base plate receiving seat 12 is placed on the foundation 20, the flatness of the upper surface 18a of the support portion 18 is measured by the level measuring device 10, and it is attached to the foundation 20 while adjusting this flatness.

[0029] The opening 19 is formed to have a diameter of approximately φ1500 mm in this example. The pump 11 is provided with a suction pipe 26 extending vertically on the pump body 25 and a discharge pipe 27 bent substantially at a right angle and extending horizontally. The vertical portion of the discharge pipe 27 passes through the opening hole 21 of the foundation 20 from the opening 19, the pump body 25 is disposed on the support portion 18, and the discharge pipe 27 is disposed horizontally. In addition, the pump 11 is provided with a base plate 33 that is fixedly placed on the support portion 18 of the base plate receiver 12. Reference numeral 28 is a fixing hole for fixing the base plate receiver 12 to the anchor bolt 29 embedded in the foundation 20. Further, reference numeral 30 is a base plate mounting hole through which bolts (not shown) for fixing the base plate 33 of the pump 11 are inserted, and a plurality of them are formed at intervals in the circumferential direction of the support portion 18.

[0030] In the present embodiment, the straight edge 13 is disposed near the opening 19 on the upper surface 18a of the support portion 18 of the base plate receiver 12 when measuring the levelness of the base plate receiver 12. As the straight edge 13, a generally commercially available product or the like can be used, and its length is arbitrarily set according to the diameter of the opening 19, the required levelness accuracy, and the like. In this case, the longer the straight edge 13 is, the larger the distance between its ends becomes, so that the digital level 14 disposed at the central position of the straight edge 13 can measure the levelness over a wide range.

[0031] The straight edge 13 is disposed such that the length directions thereof are orthogonal to the discharge direction of the pump 11 on the base plate receiver 12, that is, the extending direction of the discharge pipe 27 (the direction indicated by the arrow X in FIG. 2), and the direction orthogonal thereto, respectively. That is, two are disposed in the front and rear of the discharge direction in a direction orthogonal to the discharge direction, and two are disposed on both sides of the direction orthogonal to the discharge direction in a direction orthogonal to that direction, respectively. Therefore, the four straight edges 13 are disposed at intervals of 90° in the circumferential direction of the base plate receiver 12, and two of them are arranged parallel to each other.

[0032] In other words, the four straight edges 13 are respectively arranged at the 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions with respect to the center S of the opening 19 of the base plate receiving seat 12 in FIG. 1, in a direction orthogonal to the radial direction of the opening 19.

[0033] The four digital levels 14 are respectively placed at substantially the central positions on the upper surfaces of the four straight edges 13. These digital levels 14 have a resolution capable of measuring a levelness of at least 1 / 1000 mm. With these digital levels 14, the levelness of the base plate receiving seat 12 (the levelness of the upper surface 18a of the support portion 18) is measured via the straight edge 13.

[0034] Furthermore, the digital level 14 is provided with a wireless communication function together with the computer 15. The levelness of the base plate 12 measured via this communication function is transmitted to the computer 15. Since this communication function is wireless, the work of laying cables like those for wired connections is unnecessary, and it becomes possible to check the levelness from a more distant position compared to wired connections. Examples of this wireless communication include WiFi and bluetooth (registered trademark).

[0035] The computer 15 has a function of displaying the measured value of the levelness sent from the digital level 14 on the monitor 16 and issuing a warning display on the monitor 16 when the measured value is larger than a predetermined reference value. The monitor 16 is connected to the computer 15, and the levelness of the base plate receiving seat 12 output from this computer 15 is displayed. In the illustrated example, the computer 15 is composed of a notebook computer with an attached monitor 16 and can be carried into various sites.

[0036] Fig. 3 shows a display example of the monitor 16. In the figure, the circle represents the opening 19, and the arrow indicates the discharge direction of the pump 11 with respect to the base plate receiving seat 12. And, A and B are digital levels arranged before and after the discharge direction, and C and D display the transmission data from the digital level 14 arranged before and after in the direction perpendicular to the discharge direction. This monitor 16 has a level display section 35 that schematizes the form of a bubble level around the circle corresponding to the opening 19, and a data display section 36 that displays digital data as it is. The level display section 35 is displayed so as to have the same arrangement as the digital level 14 on the actual base plate receiving seat 12.

[0037] Also, when an inclination exceeding the reference value occurs, for example, a warning display section 37 such as being displayed in red according to the direction of the inclination is provided in the level display section 35. In the illustrated example, the margin around the memory of the level display section 35 is used as the warning display section 37. When an inclination occurs in either the left or right side of the level display section 35, the part corresponding to the direction of the inclination is displayed in red, for example. Also, for easy visual perception, a bubble 38 that moves up the scale according to the inclination is schematically displayed in the same manner as a bubble level. When the levelness is within the reference value, it is arranged at the center position of the scale. When an inclination occurs, the bubble 38 is shifted to either the left or right, and the warning display section 37 changes to red on the side where the bubble 38 is shifted.

[0038] In Fig. 3, the measured values of the data display section 36 attached to the level display section 35 of C and D are larger than the reference value. Therefore, it shows a state where the warning display section 37 is giving a warning display. The bubble 38 is displayed shifted to either side, and the surrounding margin is displayed in red or the like. The data display section 36 of the level display section 35 indicated by A and B is within the normal value range, and the bubble 38 is arranged at the center of the level display section 35. Although the margin around the scale of the level display section 35 indicated by A and B is also the warning display section 37, no warning is being displayed.

[0039] This horizontal reference can be appropriately changed by the computer 15 according to factors such as the diameters of the pump 11 and the opening 19. In addition to the warning display unit 37, a function for emitting a warning sound may also be provided.

[0040] In this embodiment, in the horizontal direction, a warning is displayed when an inclination of 5 / 100 (0.05) mm or more occurs per 1 m (1000 mm) in length. In the figure, the numerical values (-0.008, 0.007, -0.095, -0.118) of the data display unit 36 show an example of the magnitude of the inclination with respect to the horizontal direction (unit: mm). In this way, if the levelness is displayed in units of 1 / 1000 mm, it becomes possible to measure a more minute inclination.

[0041] As shown in FIG. 2, above the pump body 25, a motor (electric motor) 41 for driving the pump body 25 is arranged. This motor 41 is mounted in a state where the levelness is ensured with respect to a foundation (concrete) 42 installed in parallel with the foundation 20 on which the pump body 25 is installed. The output shaft 43 of the motor 41 is connected to the rotating shaft 44, which is the main shaft of the pump body 25, via a coupling 45.

[0042] (Adjustment and Installation Method of the Base Plate) Next, an adjustment and installation method for the base plate receiving seat 12 of the pump 11 using the level measuring device 10 will be described. While aligning the opening hole 21 of the foundation 20 with the opening 19 of the base plate receiving seat 12, the base plate receiving seat 12 is placed on the foundation 20 so that the anchor bolts 29 protruding from the foundation 20 are inserted into the fixing holes 28.

[0043] Next, a nut 51 is coupled to the anchor bolt 29 to fix the base plate receiving seat 12 to the foundation 20. Before completely fixing, it is temporarily tightened with the nut 51, and the levelness of the base plate receiving seat 12 is measured using the level measuring device 10.

[0044] First, as shown in FIG. 1, four straight edges 13 are arranged at predetermined positions with respect to the support portion 18 of the base plate receiving seat 12 placed on the foundation 20, and digital levels 14 are placed at substantially central positions on the upper surfaces of these straight edges 13, respectively.

[0045] Then, the level of the base plate receiving seat 12 is measured by the four digital levels 14. The measured values measured by the digital levels 14 are collected and stored in the computer 15, and after being processed by arithmetic operations, they are displayed on the monitor 16 as shown in FIG. 3. The operator adjusts the level (tilt) of the base plate receiving seat 12 while visually checking this monitor 16 and confirming the level numerically.

[0046] Since the measured values of the four digital levels 14 are all displayed on the monitor 16, the operator can simultaneously check the levels of the straight edges 13 on one screen of the monitor 16, facilitating the level measurement work and the work of adjusting the level of the base plate receiving seat 12 while confirming the measured values.

[0047] When adjusting the level of the base plate receiving seat 12 according to the measurement result of the level, the nuts 51 at the necessary positions are tightened according to the measured values, or liners (spacers) 52A to 52C are driven between the base plate receiving seat 12 and the foundation 20, etc., to adjust the height around the base plate receiving seat 12 so that the level becomes the reference value. These liners 52A to 52C include tapered liners 52A and 52B with one side formed as a tapered surface and a parallel liner 52C with both sides parallel, and these are used in appropriate combinations.

[0048] Then, after adjusting the level of the base plate receiving seat 12 so that it falls within the reference value, the nut 51 of the anchor bolt 29 is tightened to the specified torque, and if necessary, the base plate receiving seat 12 and the liner 52 are spot welded, and non-shrinkage grout material or the like is filled in the gap. By fixing the base plate receiving seat 12 to the foundation 20 through such operations, the leveling work of the base plate receiving seat 12 is completed.

[0049] As described above, in this installation method, the measured values of the digital levels 14 on each straight edge 13 arranged on the base plate seat 12 are collected by the computer 15 and displayed on the monitor 16 at once as shown in FIG. 3. Thus, without directly visually observing each digital level 14 on the base plate seat 12, the horizontality in each direction of the base plate seat 12 can be confirmed via the monitor 16. Since there is no need to directly visually observe the digital levels 14 in this way, the measurement work of the horizontality becomes easy. Even when the opening 19 has a large diameter, the installation and confirmation of the digital levels 14 are simple, and while visually observing the horizontality of the base plate seat 12 with the monitor 16, the horizontality in each direction can be accurately adjusted. Note that the straight edge 13 may be arranged not to span in the radial direction of the opening as shown in FIG. 5, but at the peripheral edge of the opening 19. Therefore, even if the straight edge 13 becomes longer due to the increase in the large diameter of the opening 19, the arrangement work of the straight edge 13 with respect to the opening 19 can be easily performed, and the adjustment work of the horizontality of the base plate 12 can be quickly performed by placing the straight edge 13 once.

[0050] As described above, the specific configuration of the present invention is not limited to the above-described embodiment, and design changes and the like are possible without departing from the gist of the present invention.

[0051] In the measuring device of the present embodiment, an example of the pump 11 installed on the base plate seat 12 is described as a vertical shaft axial flow pump. However, the pump 11 may be a vertical shaft mixed flow pump other than the axial flow pump, and these can be appropriately used when installed via the base plate seat 12.

[0052] Also, the same can be applied when installing the motor connected to these pumps. For example, in the motor 41 shown in FIG. 2, as shown in FIG. 5, a pedestal 46 corresponding to the base plate seat 12 in the case of the pump 11 is provided. The pedestal 46 is assembled with a plurality of girder members 47 vertically and horizontally, and an annular support portion 48 is integrally fixed to the central portion thereof. When installing this pedestal 46, the anchor bolts (not shown) of the foundation 42 are temporarily tightened through the fixing holes 49 of the girder members 47. In this state, similar to the case of the pump 11 described above, the flatness of the upper surface 48a of the support portion 48 is measured using a plurality of straight edges 13 and a digital level 14 arranged on the upper surface 48a of the support portion 48 along the periphery of the opening 55. While confirming the measured value with the monitor 16, the pedestal 46 is horizontally arranged, and each girder member 47 is fixed to the foundation 42. Then, it is performed by fixing the base plate 49 of the motor 41 on the support portion 48 of the pedestal 46. When installing the motor and the speed reducer, instead of the motor 41 in FIG. 2, a speed reducer may be installed directly above the pump, and the motor may be connected to the speed reducer in a side-mounted state.

[0053] Furthermore, although not shown, it can also be applied to other hydraulic machines such as a hydraulic generator composed of a water turbine and a generator. In the case of a hydraulic generator, for example, a water turbine is installed on the lower foundation 20 in FIG. 2, and a generator is installed on the upper foundation 42. Then, for each foundation, a base plate seat or a pedestal is horizontally attached while measuring the flatness with a straight edge and a digital level in the same manner as in the above-described embodiment, and the base plates of the water turbine and the generator are fixed to the base plate seat or the pedestal.

Explanation of Reference Numerals

[0054] 10 Flatness measuring device 11 Pump (hydraulic machine) 12 Base plate seat 13 Straight edge 14 Digital level 15 Computer 16 Monitor 18 Support portion 18a Upper surface 19 Opening 20 Foundation (Concrete) 21 Opening Hole 25 Pump Body 26 Suction Pipe 27 Discharge Pipe 28 Fixing Hole 29 Anchor Bolt 33 Base Plate 35 Level Indicator 36 Data Display 37 Warning Display 41 Electric Motor or Generator (Hydraulic Machinery) 42 Foundation (Concrete) 46 Stand 48 Support 48a Upper Surface 49 Base Plate 55 Opening

Claims

1. An apparatus for measuring the levelness of a base plate receiver seat having an opening, on which a base plate of a hydraulic machine is installed, comprising: a plurality of straight edges arranged at intervals in the circumferential direction on the base plate receiver seat; a plurality of digital levels placed at substantially central positions on the upper surfaces of these straight edges to measure the levelness of the base plate receiver seat via the straight edges; a computer from which data on the levelness of the base plate receiver seat is collected from these digital levels; and a monitor on which the levelness of the base plate receiver seat is displayed from this computer. A levelness measuring apparatus for a base plate receiver seat for installing a hydraulic machine, characterized by having these components.

2. The straight edges and the digital levels are provided in sets of four each. The levelness measuring apparatus for a base plate receiver seat for installing a hydraulic machine according to Claim 1, characterized by this arrangement.

3. The straight edges are arranged such that their length directions are orthogonal to each other with respect to four directions on the base plate receiver seat: the water flow direction of the hydraulic machine and the direction orthogonal to this water flow direction. The levelness measuring apparatus for a base plate receiver seat for installing a hydraulic machine according to Claim 2, characterized by this arrangement.

4. The computer causes the monitor to display the measured values of each of the plurality of digital levels. The levelness measuring apparatus for a base plate receiver seat for installing a hydraulic machine according to Claim 1, characterized by this function.

5. The computer has a function of displaying a warning on the monitor when the levelness of the base plate is greater than a predetermined reference value. The levelness measuring apparatus for a base plate receiver seat for installing a hydraulic machine according to Claim 1, characterized by this function.

6. The digital level is equipped with a communication function for wirelessly communicating the measured levelness to the computer. The levelness measuring apparatus for a base plate receiver seat for installing a hydraulic machine according to Claim 1, characterized by this function.

7. A base plate of a hydraulic machine is installed, and it includes a base plate receiving seat having an opening, a plurality of straight edges, a plurality of digital levels disposed on these straight edges, a computer for collecting the level data from these digital levels, and a monitor capable of displaying the level. The straight edge with the digital level placed thereon is arranged on the base plate receiving seat, and while displaying the measured value of the level collected from the digital level to the computer on the monitor, the level of the base plate receiving seat is adjusted. A method for installing a base plate receiving seat for a hydraulic machine, characterized by the above.

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