JP2003316837A - Previous evaluation method and system for piping work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a previous evaluation method and system for piping work capable of previously providing an evaluation such as the running cost after a piping work to a customer when accepting an order for the piping work for setting a pressure generator. <P>SOLUTION: This method and system comprises a piping data forming means 1 for forming piping data from a piping plan or actual piping and the characteristic of a fluid carried in the piping; a calculation means 2 for calculating necessary pressure and necessary flow rate from the piping data; a pump determination means (pressure generator determination means) 3 for determining the specification of a pump (pressure generator) from the necessary pressure and necessary flow rate; an evaluation estimating means 4 for estimating the evaluation including at least the running cost per unit time from the specification of the pump, and an output means 5 for outputting the evaluation. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-evaluation method and system for piping work for providing a customer with an evaluation after piping work in advance when receiving an order for piping work for installing a pressure generator.

[0002]

2. Description of the Related Art Conventionally, when receiving an order for piping work for installing a pressure generator, the piping route, type, diameter, specifications of the pressure generator, etc. are determined and a piping diagram is created by CAD, etc. We make quotes and approval drawings based on piping diagrams and provide them to customers.

[0003]

However, although the customer may be provided with piping drawings and approval drawings, the evaluation after piping work, for example, the calculation of running cost per unit time after piping work, etc. There is a problem that it is not possible for the customer to judge whether or not the work is commensurate with the expected effect, before the construction, because the measurement is performed only after the completion.
Also, although the cost and effectiveness of the improvement work for piping differ depending on the content, it was difficult to carry out efficient improvement work because the improvement effect due to the work content was unknown. In particular, when the plumbing work is an improvement work, the reduction of running cost is an important factor, and therefore, the customer strongly requested the provision of the evaluation including the improvement efficiency before and after the improvement work.

The present invention has been made in view of the above problems. An object of the present invention is to evaluate the running cost after the piping work for a customer in advance when receiving an order for the piping work for installing a pressure generator. It is to provide a pre-evaluation method and system for piping work that can provide the above. Further, in the pre-evaluation system for piping work of the present invention, when the piping work is improvement work, it is an object to output the improvement efficiency before and after the improvement work in the evaluation.

[0005]

In order to achieve the above-mentioned object, the pre-evaluation method for piping work according to claim 1 of the present invention is such that when a customer receives an order for piping work to install a pressure generator, This is a pre-evaluation method for piping work to provide an evaluation after piping work.Piping data is created from the piping plan or actual piping, and the fluid characteristics flowing through the piping, and the required pressure and required flow rate are calculated from the piping data. Calculating, determining the specifications of the pressure generator from the required pressure and the required flow rate, estimating the evaluation including at least the running cost per unit time from the specifications of the pressure generator, and providing the evaluation to the customer. Characterize.

[0006] The pre-evaluation system for plumbing according to claim 2, when receiving an order for plumbing for installing a pressure generator,
A pipework pre-evaluation system for providing a customer with a post-pipeline evaluation in advance, which is a pipe data creation means for creating pipe data from a pipe plan or actual pipes and fluid characteristics flowing through the pipes, and the pipes. Calculation means for calculating the required pressure and required flow rate from the data, pressure generator determination means for determining the specifications of the pressure generator from the required pressure and required flow rate, and at least running cost per unit time from the specifications of the pressure generator It is characterized by comprising an evaluation estimation means for estimating the evaluation including the above and an output means for outputting the evaluation.

According to the third aspect of the invention, in the pre-evaluation system for plumbing according to the second aspect, when the plumbing is an improved construction, the evaluation includes the improvement efficiency before and after the improved construction. Characterize.

The invention according to claim 4 is characterized in that the pre-evaluation method and system for piping work according to any one of claims 1 to 3 is applied to a coolant pipe of a machine tool.

The invention according to claim 5 is characterized in that the pre-evaluation method and system for piping work according to any one of claims 1 to 3 are applied to air piping.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram showing a pre-evaluation system for piping work according to the present embodiment, FIG. 2 is a flowchart for explaining the operation of the pre-evaluation system for piping work according to the embodiment, and FIG. 3 shows a state before improvement work. And
(A) is a piping diagram, (B) is a figure which shows the example of piping data (B). FIG. 4 is a diagram for explaining a method for reducing the discharge amount of a pump as a pressure generator verified by simulation A, FIG. 5 is a diagram for explaining a method for reducing the discharge amount of a pump as verified by simulation B, and FIG. The figure explaining the method of reducing the discharge pressure of the pump verified by simulation C, FIG. 7 is a figure which shows the output example of evaluation.

As shown in FIG. 1, the pre-evaluation system for piping work according to the present embodiment has a piping plan or actual piping,
And a piping data creating means 1 for creating piping data from the characteristics of fluid flowing through the piping, a calculating means 2 for calculating a required pressure and a required flow rate from the piping data, and a pump for determining a pump specification from the required pressure and the required flow rate. Deciding means 3
And an estimation unit 4 for estimating an evaluation including at least a running cost per unit time from the specifications of the pump, and an output unit 5 for outputting the evaluation.

Next, the operation of the pre-evaluation system for piping work when the piping work for installing the pump is an improvement work will be described with reference to the flowchart of FIG.

First, in step 1 (hereinafter abbreviated as S1), the piping data creating means 1 causes the piping and fluid data of the piping diagram before the improvement work as shown in FIG.
Discharge port diameter, discharge port quantity, piping elements (joints, pipe types, valves), piping port diameter, piping path, kinematic viscosity, etc. are read from the CAD data, or the designer is prompted to input these data, and the data shown in FIG. Create piping data as shown in (b).

Next, in S2, the discharge port diameter, the discharge port quantity, the pressure immediately before the discharge port, the piping element (joint, pipe type, valve), the piping diameter, the piping path, and the pressure of the piping element in the piping data created in S1. Loss value, pressure loss value of piping path,
And calculate the total discharge.

Next, in S3, as shown in FIG. 4, in many cases, the diameter of the discharge port is too large. Therefore, the designer is urged to change the diameter to the pressure immediately before the required discharge port and the required flow rate. If there is a change according to the designer's input, change the piping data.

Next, in S4, a simulation A for verifying the change in S3 is performed. Specifically, the discharge port diameter, the discharge port quantity, the pressure immediately before the discharge port, the piping element (joint, pipe type, valve), the piping diameter, the piping path, and the pressure of the piping element again in the piping data changed in S3. Recalculate the loss value, the pressure loss value of the piping route, and the total flow rate.

Next, in S5, it is judged whether or not there is a portion where the ejection port is capable of intermittent ejection. If there is a portion where intermittent ejection is possible, in S6 the designer is urged to change the piping data. If there is a change according to the designer's input, change the piping data. Specifically, as shown in FIG. 5, the piping data is changed so that the simultaneous discharge is intermittently discharged by a valve or the like.

Next, in S7, a simulation B for verifying the change in S6 is performed. Specifically, from the discharge port diameter, the discharge port number, the pressure immediately before the discharge port, the piping element (joint, pipe type, valve), the piping diameter, and the piping path in the piping data changed in S6, the pressure loss of the piping element is again obtained. Recalculate the value, pressure loss value of the piping path, and total flow rate. In S5, if there is no portion where the ejection port can eject intermittently, the process proceeds to S8.

Next, in S8, it is judged whether or not there is a portion with a large pressure loss value in the piping data changed in S6. If there is a portion with a large pressure loss value, S9
Prompts the designer to change the piping data, and if there is a change according to the designer's input, changes the piping data. Specifically, as shown in FIG. 6, a portion with a large pressure loss value of the pipe, for example, a portion with a bent pipe and a long total length may be deleted (see FIG. 6A), or the pressure loss value may be deleted. The piping diagram data is changed so as to reduce the discharge pressure of the pump by using the method of replacing the large-diameter member and the small-diameter pipe with the small-pressure loss member and the large-diameter pipe (see FIG. 6B).

Next, in S10, a verification simulation C of the change in S9 is performed. Specifically, from the discharge port diameter, the discharge port number, the pressure immediately before the discharge port, the pipe element (joint, pipe type, valve), the pipe diameter, and the pipe route in the pipe data created in S9, the pipe element Recalculate the pressure loss value, the pressure loss value in the piping path, and the total flow rate. If there is no portion where the pressure loss value of the pipe is large in S8, the process proceeds to S11.

Next, in S11, the calculating means 2 first calculates the required pressure and the required flow rate from the piping data created by the piping data creating means 1 according to the following equations. Required pressure = pressure immediately before the discharge port + actual head + pressure loss value + α (α:
Margin coefficient) Required flow rate = Discharge amount at discharge port

Next, the pump determining means 3 determines the pump specifications from the required pressure and the required flow rate calculated by the calculating means 2.

Next, in S12, the evaluation estimating means 4 determines the specifications of the pump determined by the pump determining means 3, the required pressure calculated by the calculating means 2 and the required power calculated from the required flow rate, and the value before improvement. Electric power is compared, running cost per unit time is calculated, and improvement efficiency is estimated as an evaluation.

Finally, the output means 5 outputs the evaluation estimated by the evaluation estimating means 4. FIG. 7 shows an output example of evaluation.

Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the invention. Also included in the present invention. For example, in the pre-evaluation system for piping work according to the present embodiment, the case where the piping work is the improvement work has been described, but the present invention is also applicable to new piping work.

Further, it is also possible to include the calculated running costs per unit time of the piping data (8 ways) in the case where the simulations A to C are combined with the evaluation, and the piping diagrams associated therewith.

Further, since the piping data created by the piping data creating means 1 has the data such as the pressure loss value and the flow velocity for each piping and each piping element, the location in the piping where the strength may be deteriorated is estimated and evaluated. It is also possible to provide it to the customer.

Furthermore, it is naturally conceivable to calculate the estimate of the construction cost from the piping data created by the piping data creating means 1.

[0029]

Since the present invention is configured as described above, when an order for piping work for installing a pressure generator is received, it is possible to pre-estimate and output an evaluation after the piping work, and Can know in advance information such as running cost per unit time after piping work. Also,
The side that receives the plumbing work can propose the plumbing work according to the budget, and can close the gap between the estimate and the actual construction cost.

Further, when the piping work is an improvement work, by including the improvement efficiency before and after the improvement work in the evaluation, the customer can know the cost that can be reduced by a concrete number, and the negotiation of the order becomes smooth. .

Further, since the calculating means calculates the required flow rate and the required pressure from the piping data, it has an effect that the specifications of the pressure generator can be easily determined at the time of designing.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a prior evaluation system for piping work according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the pre-evaluation system for piping work according to the embodiment.

FIG. 3 is a diagram showing an example of a piping diagram (a) and piping data (b) before improvement work.

FIG. 4 is a diagram illustrating a method of reducing a discharge amount of a pump, which is performed in simulation A.

FIG. 5 is a diagram illustrating a method of reducing a discharge amount of a pump, which is performed in simulation B.

FIG. 6 is a diagram illustrating a method for reducing the discharge pressure of a pump, which is performed in simulation C.

FIG. 7 is a diagram showing an output example of evaluation.

[Explanation of symbols]

1 Piping data creation means 2 Calculation means 3 pump determination means 4 Evaluation and estimation means 5 Output means

Claims (5)

[Claims] 1. A pre-evaluation method of piping work for providing a customer with an evaluation after the piping work in advance when receiving an order for the piping work for installing a pressure generator. Create piping data from the characteristics of the fluid flowing through the piping, calculate the required pressure and the required flow rate from the piping data, determine the specifications of the pressure generator from the required pressure and the required flow rate, at least a unit from the specifications of the pressure generator A pre-evaluation method for piping work, which comprises estimating an evaluation including a running cost per hour and providing the evaluation to a customer. 2. A pre-evaluation system for piping work, which provides a customer with an evaluation after the piping work in advance when receiving an order for the piping work for installing a pressure generator. Piping data creation means for creating piping data from the characteristics of the fluid flowing through the piping, calculation means for calculating the required pressure and required flow rate from the piping data, and pressure generation for determining the specifications of the pressure generator from the required pressure and required flow rate Machine determining means, an evaluation estimating means for estimating an evaluation including at least a running cost per unit time from the specifications of the pressure generator, and an output means for outputting the evaluation. Prior evaluation system. 3. The pre-evaluation system for plumbing according to claim 2, wherein when the plumbing is improvement work, the efficiency is output including the improvement efficiency before and after the improvement work. Advance evaluation system. 4. A pre-evaluation method and system for piping work, wherein the pre-evaluation method and system for piping work according to any one of claims 1 to 3 is applied to a coolant pipe of a machine tool. 5. A pre-evaluation method and system for plumbing, wherein the pre-evaluation method and system for plumbing according to any one of claims 1 to 3 are applied to air piping.