JPH06174511A - Electromagnetic flowmeter detector - Google Patents

Abstract

PURPOSE:To prevent breakdown such as peeling, etc., of a lining part even if the inside of a pipe is changed to negative pressure by forming the joint line of the sheet of a lining reinforcing material in circular pipe shape so that it is at an angle to the direction of axial line. CONSTITUTION:A lining reinforcing material 3 is in cylindrical shape by rolling a sheet and a joint line 5 for joining both edges of the sheet so that it is at an angle theta to the axial-line direction of a cylinder. By sliding both edges of the sheet along the joint line 5, the outer diameter of a cylinder can be continuously changed, thus obtaining the outer diameter of the reinforcing material 3 matching an actual inner diameter even if the inner diameter of a measuring pipe 1 scatters, thus achieving positioning so that a plurality of wires 6 which are laid out on the outer surface of the reinforcing material 3 uniformly contact the inner surface of a measuring pipe 1 and obtaining a uniform spacing between the inner surface of the measuring pipe 1 and the reinforcing material 3 and hence improving mechanical strength of lining and preventing the lining from peeled even if the inside of the pipe of the measuring pipe 1 is changed into negative pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic flow meter detector which does not cause damage or abnormality in a lining portion even when a negative pressure is temporarily generated in a pipe.

[0002]

2. Description of the Related Art FIGS. 3A and 3B show a conventional example of a lining reinforcing material. Cylindrical stiffener 13 with multiple holes 14
The lining 12 is formed by molding in a state where the is concentrically inserted into the measuring tube 11 and fixed in position.

In the case of this lining reinforcing material, since a cylindrical material is inserted into the measuring pipe 11, it is very difficult to make the gap with the measuring pipe uniform. this is,
It is customary to use a non-magnetic pipe or a casting material for the measuring pipe, but in these cases, it is unavoidable that the inner diameter of the measuring pipe fluctuates. very hard. Therefore, the outer diameter of the lining reinforcing material is determined by the average inner diameter of the measuring pipe. Therefore, it is not possible to obtain a lining reinforcing material corresponding to the variation in the inner diameter of the measuring pipe, and the gap between the inner surface of the measuring pipe and the lining reinforcing material is not uniform, so that the thickness of the lining is uneven and should be originally obtained. The mechanical strength of the lining could not be obtained, which could lead to damage to the lining.

[0004]

SUMMARY OF THE INVENTION In view of the problem of nonuniformity of the gap between the inner surface of the measuring pipe and the lining reinforcing material in the above-mentioned prior art, the present invention can make the gap between the inner surface of the measuring pipe and the lining reinforcing material uniform. By functioning as the original lining reinforcing material, even when the inside of the pipe becomes negative pressure,
An object of the present invention is to provide an electromagnetic flowmeter detector that does not cause damage such as peeling of the lining portion.

[0005]

An electromagnetic flowmeter detector according to the present invention comprises a lining portion provided on the inner surface of a measuring pipe,
A cylindrical lining reinforcement with a number of holes distributed and drilled is formed by forming an angle between the joining lines of the sheet and the axial direction of the cylinder, and the lining reinforcement is formed on the outer peripheral surface of the cylinder. It is characterized in that it is integrally molded in the lining while maintaining a uniform gap with the inner surface of the measuring tube by a plurality of wires extending parallel to the axis between both ends of the cylinder and arranged at equal intervals.

[0006]

In the electromagnetic flowmeter detector of the present invention, the lining reinforcing material is formed by rolling the sheet into a cylindrical shape, and the joining line is angled with respect to the axial direction of the cylinder. The outer diameter of the cylinder can be continuously changed by sliding both ends of the sheet. As a result, even if the inner diameter of the measuring pipe varies, the outer diameter of the lining reinforcement that matches the actual inner diameter can be obtained, so multiple wires arranged on the outer surface of the lining reinforcement will contact the inner surface of the measurement pipe evenly. It becomes possible to perform positioning so that a uniform gap between the inner surface of the measuring pipe and the lining reinforcing material is inevitably obtained. As a result, the thickness of the lining becomes uniform, and the lining reinforcing material exerts its original reinforcing function, so that peeling of the lining portion and the like can be prevented even when negative pressure is applied.

[0007]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

1 (a), 1 (b) and 1 (c) show an electromagnetic flowmeter detector according to an embodiment of the present invention. 1 (a) shows a measuring pipe, FIG. 1 (b) shows a lining reinforcement, and FIG.
(C) shows a joining line in the lining reinforcing material.

In FIG. 1 (a), the lining reinforcement 3 integrally molded inside the lining 2 formed on the inner surface of the measuring tube 1 has a large number of holes 4 distributed as shown in FIG. 1 (b). Formed by rolling the punched sheet into a cylindrical shape,
As shown in FIG. 1C, the joining line 5 of the sheet is formed with a small angle θ with respect to the axial direction of the cylinder.

Further, on the outer peripheral surface of the lining reinforcement 3,
As shown in FIG. 1 (b), a plurality of wires 6 are arranged in parallel with the axis of the cylinder and extend between both ends of the cylinder and are fixed at equal intervals by bonding or the like. In addition, it is highly effective as a reinforcing member that the thickness of the wire 6 is smaller than the diameter of the hole 4 formed in the lining reinforcing member 3. If the diameter is larger than the hole diameter, the hole 4 may be blocked by the wire 6, and the effect is reduced. Since the gap between the inner surface of the measuring pipe 1 and the lining reinforcement 3 is usually around 1 to 2 mm, the wire diameter is also around 1 to 2 mm. Then, the hole diameter of the hole 4 of the reinforcing material 3 is about 3 to 5 mm, which is appropriate in that the lining material in the hole 4 produces an anchor effect.

In the electromagnetic flowmeter detector of one embodiment of the present invention constructed as described above, the lining reinforcing material 3 is
The sheet is rolled into a cylindrical shape, and the joining line 5 for joining the both ends of the sheet has an angle θ with respect to the axial direction of the cylinder. Therefore, as shown in FIG. 2, slide both ends of the sheet along the joining line 5. By doing so, the outer diameter of the cylinder can be continuously changed. As a result, even if the inner diameter of the measuring pipe 1 varies, the lining reinforcement 3 that matches the actual inner diameter
Since the outer diameter is obtained, it becomes possible to position the plurality of wires 6 arranged on the outer surface of the lining reinforcement 3 so as to uniformly contact the inner surface of the measurement pipe 1, and the inner surface of the measurement pipe 1 and the lining reinforcement 3 can be evenly arranged. A gap is inevitably obtained.

As a result, the thickness of the lining 2 becomes uniform, and the lining reinforcing material 3 exerts its original reinforcing function, so that the mechanical strength of the lining is improved and even when the inside of the pipe becomes a negative pressure. It is possible to prevent breakage of the lining portion such as peeling of the lining.

Further, the wire 6 not only makes the gap between the inner surface of the measuring tube 1 and the lining reinforcing material 3 uniform,
It serves as a guide for molding the lining 2 and also has a function of preventing molding defects such as cavities during molding.

[0014]

As described above in detail, according to the present invention, the lining reinforcing material, which is a cylindrical lining reinforcing member provided with a large number of holes in the lining portion formed on the inner surface of the measuring tube, is a sheet. Is formed with an angle with respect to the axial direction of the cylinder, and this lining reinforcement is extended inside the measuring pipe by a plurality of wires that extend between both ends of the cylinder parallel to the cylinder axis on its outer peripheral surface. By realizing an electromagnetic flowmeter detector characterized by being integrally molded inside the lining with a uniform gap maintained between the surfaces, the lining reinforcing material can slide both ends of the sheet along the joining line. Since the outer diameter can be changed, it can be adjusted to the actual inner diameter even if the inner diameter of the measuring tube varies.
It is possible to position the wire arranged on the outer surface of the lining reinforcement so as to uniformly contact the inner surface of the measurement pipe, and to secure a uniform gap between the inner surface of the measurement pipe and the lining reinforcement.
As a result, the thickness of the lining becomes uniform, and the lining reinforcing material exerts its original reinforcing function, so the mechanical strength of the lining is improved and the lining peels off even when the inside of the pipe becomes negative pressure. It is possible to prevent breakage of the lining part. Also, the wire not only makes the gap between the inner surface of the measuring tube and the lining reinforcement constant, but also
It also serves as a guide for molding the lining and also has an effect of preventing molding defects such as cavities during molding.

[Brief description of drawings]

1 (a), (b) and (c) show an electromagnetic flowmeter detector according to an embodiment of the present invention, and FIG. 1 (a) is a sectional view of a measuring tube, and FIG. ) Is an external perspective view of the lining reinforcement, and FIG. 1C is a schematic view showing a joining line in the lining reinforcement.

FIG. 2 is a schematic view showing a state in which both ends of the sheet are slid along a joining line before joining the lining reinforcing material of FIG. 1 (b).

3 (a) and 3 (b) show a conventional example of a lining reinforcing material, and FIG. 3 (a) is a sectional view of a measuring tube.
(B) is an external perspective view of a lining reinforcing material.

[Explanation of symbols]

 1 ... Measuring tube 2 ... Lining 3 ... Lining reinforcement 4 ... Hole 5 ... Joining line 6 ... Wire

Claims (2)

[Claims] 1. In a lining portion provided on the inner surface of a measuring pipe of an electromagnetic flowmeter detector, a cylindrical lining reinforcing material in which a number of holes are distributed and drilled has a joining line of the sheet in the axial direction of the cylinder. An electromagnetic flowmeter detector characterized in that the lining reinforcing material is integrally molded inside the lining while maintaining a uniform gap with the inner surface of the measuring pipe. 2. The electromagnetic flowmeter detector according to claim 1, wherein a plurality of wires extending between both ends of the cylinder in parallel with the cylinder axis are arranged on the outer peripheral surface of the lining reinforcing material.