JP2787395B2 - Steam flow meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam flow meter capable of measuring a flow rate of steam to be heated or dried by various devices. In a steam heating device or the like, a steam flow meter is attached to the inlet side of the device in order to grasp the consumption of steam. This is because the amount of consumed steam is grasped and an appropriate amount of steam is supplied to the apparatus. Depending on the type of the object to be heated, it is necessary to maintain the heating temperature with little variation and high accuracy.
For example, in the case of foods, pharmaceuticals, chemicals, and the like, quality may be degraded due to a temperature change during heating.

[0002]

2. Description of the Related Art In a conventional steam heating apparatus, a steam flow meter is mounted on an inlet side, and a heating object amount detecting means such as a flow meter is separately provided on a heating object supply side in order to grasp a supply amount of the heating object. Is provided so that the heating temperature of the object to be heated is accurately maintained by appropriately supplying both the amount of the object to be heated and the amount of steam.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
A separate heated object flow meter is required together with the steam flow meter, so that the cost of the apparatus using the steam increases, and the configuration of the apparatus becomes complicated. Currently, flow meters based on various measurement principles are used, but the flow meter itself is expensive, and a flow meter that can measure a flow rate with high accuracy is particularly expensive.

[0004] Accordingly, it is an object of the present invention to provide a steam flow meter capable of accurately maintaining a heating temperature of a heated object without providing a separate flow meter for the heated object.

[0005]

Means for Solving the Problems] technical means of the present invention taken in order to solve the technical problems described above, the steam flow rate detecting means and a steam pressure temperature detection means for detecting the pressure and temperature of the steam has, computing the passed steam heat by a signal from the steam flow rate detecting means and the steam pressure temperature detection means
In a flow meter that can be provided , a reference calorie input means is provided,
A calculation unit for calculating a ratio of the reference amount of heat input and passed steam heat provided, the ratio between said steam passing through heat and inputted reference heat
Can be used to determine whether the calorific value of passing steam is appropriate.
Or the reference amount of heat, for example,
By inputting the required amount of heat for quantification,
The supply amount of the object to be heated is determined by the ratio of the heat quantity to the reference heat quantity.
Is appropriate or not .

[0006]

The operation of the above technical means is as follows.
By providing the reference calorie input means and calculating the ratio between the steam calorie and the reference calorie, it is possible to grasp whether or not the supplied steam calorie is appropriate based on the reference calorie, and as the reference calorie, for example, of the object to be heated. By inputting the required amount of heat in the steam using device when the amount is a predetermined amount, it is determined whether the amount of the heated object exceeds the predetermined amount, that is, whether the supply amount of the heated object is appropriate. Therefore, the amount of the object to be heated can be appropriately supplied together with the amount of the supplied steam, and the heating temperature of the object to be heated can be accurately maintained.

[0007]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). In this embodiment, an example is shown in which a steam flow meter is used for a steam heating device. A steam supply pipe 10 for supplying steam to the steam heating device 1 is connected.
0, a steam flow meter 3 and a pressure sensor-8 and a temperature sensor 9 as steam pressure / temperature detecting means are attached. On the secondary side of the steam heating device 1, a condensate outlet pipe 20 for leading out the condensate generated in the steam heating device 1 is connected, and a steam trap 7 for automatically discharging the condensate flowing down is attached.
The steam trap 7 is not always necessary if the amount of condensate generated in the steam heating device 1 is constant. The steam flow meter 3, the pressure sensor 8 and the temperature sensor 9 are connected to the calculation unit 6, respectively. The arithmetic unit 6 is provided with a reference calorie input means (not shown) for inputting a reference calorie. Specifically, it is assumed that a numerical value can be input using a numeric keypad.

The steam flow meter 3 may be of any type known in the art, but an orifice type or Karman vortex type flow meter is suitable. Similarly, a conventionally well-known sensor can be used as the pressure sensor 8 and the temperature sensor 9.

On the primary side of the flow meter 3 of the steam supply pipe 10, a control valve 11 for adjusting the amount of steam supplied and a separator 22 for separating steam and condensate in the steam supply pipe 10 are provided.
A system that discharges the condensate separated by the separator 22 out of the system
The air trap 23 is provided. A heating object supply pipe 12 for supplying an object to be heated is connected to the steam heating device 1 via a valve 14, and an extraction pipe 13 for extracting the object to be heated is also provided.
Connect.

Next, the operation will be described. The object to be heated in the steam heating device 1 is latent-heated by the steam supplied from the steam supply pipe 10 and is taken out from the article to be taken out 13.
The amount of supplied steam is measured by the steam flow meter 3. The steam deprived of heat by the latent heat is condensed and discharged out of the system through a steam trap 7 attached to the secondary side of the steam heating device 1. Signals from the steam flow meter 3, the pressure sensor 8 and the temperature sensor 9 are input to the calculation unit 6. The calorific value of the steam supplied to the steam heating device 1 is calculated from the steam flow rate, the steam pressure, and the temperature by the calculating unit 6.
By inputting a reference calorie from a reference calorie input means (not shown) provided in the computing unit 6 and dividing the steam calorie, the ratio of the supplied steam calorie based on the reference calorie is calculated, and is the ratio less than the reference calorie? It is possible to determine whether the amount exceeds the amount or whether the amount of steam is appropriate. Thus, the amount of steam can be adjusted through the control valve 11. Also, by inputting the required heat amount when the amount of the object to be heated is a predetermined amount as the reference heat amount, that is, the design heat amount at the time of designing the apparatus, the amount of the object to be heated is determined from the ratio of the predetermined steam heat amount to the reference heat amount. It is possible to know whether the number is large or small.
Can adjust the amount of the object to be heated. Therefore,
The temperature of the object to be heated can be accurately maintained by grasping and adjusting the amount of heat of the supplied steam and the amount of the object to be heated only by the steam flow meter 3.

[0011]

As described above, according to the present invention, there is no need for a flow meter for separately detecting the supply amount of the object to be heated, so that the cost of the apparatus using steam is reduced and the structure of the apparatus is simple. Thus, a steam flow meter that can be used is obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a steam using device using a steam flow meter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steam heating device 3 Steam flow meter 6 Operation part 8 Steam pressure sensor 9 Steam temperature sensor 10 Steam supply pipe 11 Control valve 12 Heated object supply pipe 13 Heated object removal pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01F 1/00 F24H 1/14 F28D 15/02 G01F 15/04 G01K 17/06

Claims (1)

(57) [Claims] And 1. A steam flow rate detecting means, and a steam pressure temperature detection means for detecting the pressure and temperature of the steam, calculates a passed steam heat by a signal from the steam flow rate detecting means and the steam pressure temperature detection means In a flow meter that can
A reference calorie input means is provided, and a calculation unit for calculating a ratio between the passing steam calorie and the inputted reference calorie is provided, and the passing steam calorie is provided .
Is appropriate based on the ratio of the input calorific value to
Whether it is or not, or
Input the required amount of heat when the amount of the object to be heated is a predetermined amount
By doing so, the ratio between the passing steam calorie and the reference calorie
To ascertain whether or not the supply amount of the heated object is appropriate
A steam flowmeter characterized by the ability to: