JP2011106916A - Differential pressure measuring device - Google Patents

Abstract

A differential pressure measuring apparatus having a long drain plug that can be processed easily and at low cost and whose length can be freely determined by a user to use is realized.
A differential pressure measuring device having a drain plug and a drain plug unit that is attached to a differential pressure measuring device main body and provided with a columnar relay drain socket main body and one end side of the relay drain socket main body. A male screw that can be screwed with the male screw of the drain socket, a male screw that is provided on the other end side of the relay drain socket body, the same male screw as the male screw of the drain socket, and passes through the central axis of the relay drain socket main body and pulls out the drain. A differential pressure measuring device comprising a plurality of relay drain sockets, each having a drain hole and inserted between the drain plug unit and the differential pressure measuring device main body.
[Selection] Figure 1

Description

The present invention relates to a differential pressure measuring device.
More specifically, the present invention relates to an improvement of a drain plug unit for draining a differential pressure measuring device.

  8A and 8B are explanatory views of a main part configuration of a conventional example that is generally used conventionally. FIG. 8A is a front view, FIG. 8B is a side view, FIG. 9 is a main part configuration explanatory view of FIG. 11 is an operation explanatory diagram of FIG.

In the figure, reference numeral 2 denotes a pressure receiving unit which is filled with a process fluid and receives pressure from the process, and 1 is a transmission unit which converts the pressure received from the power source and the process into a signal and outputs the signal.
The pressure receiving unit 2 includes a flange 3 that is fixed by a bolt 5 and a nut 6, and a main body unit 4 that transmits pressure to the transmission unit 1 using a sensor.

The flange 3 is provided with a drain plug unit 7 attached by a sealant, a seal tape, welding or the like for draining the process fluid filled in the pressure receiving part during maintenance or the like (for draining). Yes.
The drain plug unit 7 closes one end side of the drain drain hole 713 of the drain socket 71 and a drain socket 71 having a drain drain hole 713 and a male screw 712 fixed to the flange 3 with a columnar drain plug unit main body 711. It is comprised with the plug 72 which drains at the time of work.

The drain hole 712 is usually manufactured by drilling or the like.
As shown in FIG. 10, when the process fluid solidifies due to the ambient temperature or the like, the pressure receiving unit 2 is kept warm by a heater or the like. In this case, as shown in FIG. 11, the drain plug unit 7 needs to be longer than the heat insulating material (heater) 8.
Here, “a long drain plug” is referred to as a “long drain plug”.
Usually, a general drain plug is about 20 to 35 mm, and a long drain plug is about 100 to 150 mm.

Japanese Utility Model Publication No. 61-137247 JP 2002-377499 A JP 2005-221350 A JP 2008-215966 A

Such an apparatus has the following problems.
When a long drain plug is processed, the internal drain hole becomes long, so that it is difficult to process the drain hole.
Since the processing is difficult, the manufacturing cost increases.
Even the length of the manufactured long drain plug may be shortened when the heat insulating material is wound.

The object of the present invention is to solve the above problems.
An object of the present invention is to provide a differential pressure measuring device having a long drain plug that can be processed easily and at low cost, and whose length can be freely determined by a user.

In order to achieve such a problem, in the present invention, in the differential pressure measuring device of claim 1,
A differential pressure measuring device having a drain plug and a drain plug unit attached to the differential pressure measuring device main body, the columnar relay drain socket main body, and the drain socket provided on one end side of the relay drain socket main body A male screw that can be screwed together, a male screw that is provided on the other end side of the relay drain socket body and is the same as the male screw of the drain socket, and a drain hole that passes through the central axis of the relay drain socket body and extracts the drain. And a plurality of relay drain sockets inserted between the drain plug unit and the differential pressure measuring device main body.

In the differential pressure measuring device according to claim 2 of the present invention, in the differential pressure measuring device according to claim 1,
The junction drain socket is L-shaped or U-shaped.

In the differential pressure measuring device according to claim 3 of the present invention, in the differential pressure measuring device according to claim 1 or 2,
The drain hole is a hole formed by electric discharge machining.

According to claim 1 of the present invention, there are the following effects.
A differential pressure measuring device having a long drain plug that can be processed easily and at low cost and whose length can be freely determined by the user in use is obtained.

According to claim 2 of the present invention, there are the following effects.
A differential pressure measuring device capable of easily changing the direction of the drain is obtained.

According to claim 3 of the present invention, there are the following effects.
Since the drain hole is constituted by a hole formed by electric discharge machining, a differential pressure measuring device that can make the hole thin and improve the strength of the relay drain socket is obtained.

It is principal part structure explanatory drawing of one Example of this invention. It is principal part structure explanatory drawing of FIG. FIG. 1 is an explanatory diagram of the operation. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other conventional example generally used conventionally. It is principal part structure explanatory drawing of FIG. It is operation | movement explanatory drawing of FIG. It is operation | movement explanatory drawing of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating the configuration of the main part of one embodiment of the present invention, FIG. 2 is a diagram illustrating the configuration of the main part of FIG. 1, and FIG. 3 is a diagram illustrating the operation of FIG.
In the figure, the same symbols as those in FIG. 8 represent the same functions.
Only the difference from FIG. 8 will be described below.

  1 and 2, a relay drain socket 11 is provided with a columnar relay drain socket main body 111, a female screw 112 provided on one end side of the relay drain socket main body 111, and a male screw 712 of the drain socket can be screwed together, and a relay drain socket. A drain plug 114 provided on the other end side of the socket body 111 and having the same male screw 113 as the male screw 712 of the drain socket and a drain hole 114 penetrating the central axis of the relay drain socket main body 111, as shown in FIG. Between the unit 7 and the pressure receiving part 2 are inserted and arranged, and a plurality of them are arranged.

In this case, two are arranged.
The relay drain socket body 111 is preferably manufactured to have an optimal length that allows the drain hole 114 to be easily processed, for example, 20 to 35 mm.
The relay drain socket main body 111 is made of a metal material, and in this case, a material such as stainless steel, difficult-to-work material tantalum, monel, titanium, or high nickel steel is used.

In the above configuration, when the heat insulating material 8 is used, as shown in FIG. 3, the drain plug unit 7 and the plurality of relay drain sockets 11 are connected and assembled so that the plug 72 is exposed outside the heat insulating material 8.
By connecting a plurality of relay drain sockets 11, the entire length of the drain plug can be freely adjusted and adjusted so as to be exposed to the outside of the heat insulating material 8.

  As a result, it is possible to obtain a differential pressure measuring device having a long drain plug that can be processed easily and at low cost and whose length can be freely determined by the user.

FIG. 4 is an explanatory view of the main part configuration of another embodiment of the present invention.
FIG. 4 shows an example of use in a protective box 21 used to suppress temperature changes such as a wall that interferes with the plug 72 or windproof / sunshade when draining.

FIG. 5 is an explanatory view showing the configuration of the main part of another embodiment of the present invention.
In FIG. 5, the example used for the diaphragm seal type | mold differential pressure measuring apparatus which connects the pressure receiving part 32 and the transmitter main body 4 with the capillary tube 31 is shown.

FIG. 6 is an explanatory view of the main part configuration of another embodiment of the present invention.
In FIG. 6, the entire drain plug is formed in an L shape.
The main body 411 of the relay drain socket 11 is bent into a required shape, and the entire drain plug is formed in an L shape.
Therefore, if the main body 411 is U-shaped or the like, the entire drain plug can be manufactured in various shapes such as U-shaped.

FIG. 7 is an explanatory view of the main part configuration of another embodiment of the present invention.
In FIG. 7, in the embodiment of FIG. 1, the drain plug is attached to the flange at one place, but it is attached to the side face at two places or three places.

  In the above-described embodiment, the length of the relay drain socket main body 111 is attached, and the relay drain socket main body 111 is manufactured with an optimum length that can easily process the drain hole 114, for example, 20 to 35 mm. However, the present invention is not limited to this. In short, any length may be used as long as the drain hole 114 can be easily processed.

  Further, although the drain hole 114 is processed by drilling, electric discharge machining may be used. According to the electric discharge machining, since the narrow hole can be machined, the strength of the relay drain socket body 111 can be improved.

The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.

DESCRIPTION OF SYMBOLS 1 Transmission part 2 Pressure receiving part 3 Flange 4 Main body part 5 Bolt 6 Nut 7 Drain plug unit 8 Thermal insulation 71 Drain socket 711 Drain plug unit main body 712 Male screw 713 Drain hole 72 Plug 11 Relay drain socket 111 Relay drain socket main body 112 Female screw 113 Male thread 114 Drain hole 21 Protective box 31 Capillary tube 32 Pressure receiving portion 411 Main body

Claims (3)

In the differential pressure measuring device comprising a drain plug unit having a drain socket and a plug and attached to the differential pressure measuring device main body,
A columnar relay drain socket body;
A female screw provided on one end side of the relay drain socket body and capable of being screwed with the male screw of the drain socket;
The same external thread as the external thread of the drain socket provided on the other end side of the relay drain socket body,
A drain hole that penetrates the central axis of the relay drain socket body and extracts the drain;
A differential pressure measuring device comprising a plurality of relay drain sockets inserted and arranged between the drain plug unit and the differential pressure measuring device main body. The differential pressure measuring device according to claim 1, wherein the joint drain socket is L-shaped or U-shaped. The differential pressure measuring device according to claim 1, wherein the drain hole is a hole formed by electric discharge machining.

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