JPH09112748A - Hanger travel reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reader which accurately and easily reads traveling of a pipe without any need of going to the installation point of a spring hanger. SOLUTION: This device is so constituted that a pipe 3 vertically moving by heat expansion, etc., is hung by a spring hanger 1 and detects the moving distance of the pipe 3. In this case, a travel transmission wire 24 for transmitting the pipe moving distance is connected to the spring hanger 1 and a travel display 25 for displaying the moving distance 24 is connected to the other end of the transmission wire. The travel display 25 is installed on a scaffold 41, etc., in the adjacent to the pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring hanger that supports a pipe or the like (duct, boiler body, etc.) that moves up and down due to thermal expansion or the like, and in particular, a hanger travel that can read the amount of movement of the spring hanger. The present invention relates to a reading device.

[0002]

2. Description of the Related Art As shown in FIG. 3, a spring hanger 50 is for elastically suspending a pipe 3 for connecting a boiler or the like to absorb a vertical movement (travel) of the pipe 3, and a ceiling. 6, a frame 6 suspended from a beam 5 and the like, an arm 7 rotatably supported by the frame 6 and suspending the pipe 3 via a turnbuckle 2, and an arm 7
And a spring 8 for supporting the pipe 3 by urging it upward through the arm 7.

When the pipe 3 moves in the vertical direction due to thermal expansion or the like, the arm 7 is rotated to a position that balances with the urging force of the spring 8 to support the pipe 3 while allowing the vertical movement of the pipe 3. At this time, the spring 8 has its spring constant and expansion / contraction amount adjusted so as to properly maintain the weight of the pipe 3 supported and its vertical movement due to thermal expansion.

The spring hanger 50 is provided with a hanger travel reading device 51 for reading the rotation amount of the arm 7, that is, the vertical movement amount of the pipe 3. The hanger travel reading device 51 reads the movement amount of the pipe from the rotation angle of the arm 7.
It is provided directly on the spring hanger 50.
Specifically, the hanger travel reading device 51 includes a travel indicator 52 that is integrally provided on the arm 7 and indicates a rotating position of the arm 7, and a frame 6 to quantitatively indicate the position of the travel indicator 52. And the scale 53 formed.

[0005]

However, since the hanger travel reading device 51 is integrally provided on the spring hanger 50 provided at a relatively high place, it is difficult to read the hanger travel reading device 51. Conventionally, the scale 53 indicated by the travel indicator 52 is read using binoculars or the like, or is read by going to the scaffold near the installation position of the spring hanger 50. However, when using binoculars or the like, the travel of the pipe 3 cannot be accurately read, and when reading at the installation position of the spring hanger 50, the scaffold is not necessarily located near the spring hanger 50. However, there was a problem that a dedicated scaffold for that purpose had to be provided.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and provide a hanger travel reading device for a spring hanger that can accurately and easily read the travel of a pipe without going to the installation position of the spring hanger. is there.

[0007]

In order to achieve the above object, the invention according to claim 1 is for suspending a pipe moving vertically due to thermal expansion or the like with a spring hanger and detecting the amount of movement of the pipe. In the hanger travel reader,
A travel transmission wire for transmitting the movement amount of the pipe is connected to the spring hanger, and a travel indicator for indicating the movement amount is connected to the other end of the transmission wire.

According to a second aspect of the present invention, the travel indicator is installed on a scaffold near the pipe.

According to a third aspect of the present invention, the travel transmission wire is composed of a tube and a wire, one end of the wire is connected to a movable support portion that supports piping of the spring hanger, and one end of the tube is of the spring hanger. The tube is connected to the fixed portion, the other end of the tube is connected to the travel indicator, and the other end of the wire is connected to the movement indicating needle of the travel indicator.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a spring hanger 1
Is for suspending a pipe 3 of a boiler (not shown) via a turnbuckle 2 and a supporting beam 5 via a suspending tool 4.
Suspended. The spring hanger 1 mainly includes a frame 6, an arm 7 and a spring 8.

As shown in FIG. 2, the frame 6 includes a left frame plate 10, a right frame plate 11, and an upper mounting member 1.
Consists of two. Left frame plate 10 and right frame plate 1
Reference numeral 1 is a plate that forms both side surfaces of the frame 6, and the arm 7 is supported by sandwiching the frame plates 10 and 11 from the left and right and is rotatably supported. A seat plate 14 for seating one end (front end) of the spring 8 is provided at the rear end (right side in FIG. 1) of the frame 6.

The seat plate 14 is an annular plate and is provided on the end surfaces of the left frame plate 10 and the right frame plate 11 with their plate surfaces fixed. The upper mounting bracket 12 fixedly connects the left frame plate 10 and the right frame plate 11 to the left and right, and the upper parts of the left frame plate 10 and the right frame plate 11 in order to connect the suspension 4 to the frame 6. It is provided by connecting. The left and right sides of the upper mounting bracket 12 are
The left frame member 10 and the right frame plate 11 are respectively connected, and the upper part of the upper mounting member 12 is rotatably connected to the lower part of the hanger 4. In addition, the tube 2 of the travel transmission wire 24, which will be described later, is attached to the front end of the upper mounting member 12.
One end of 6 is connected.

The arm 7 has a frame 6 on the left and right of the lower center.
It is rotatably supported by the rotary shaft 13, and the weight of the pipe 3 is supported by the tensile force of the spring 8 with the rotary shaft 13 as a fulcrum. The arm 7 includes left and right arm plates 15 and 15
And an arm connecting plate 16 that connects the arm plates 15 and 15 to the left and right, and is formed into a frame-shaped member. A load receiving member 17 that is connected to the turnbuckle 2 and receives the load of the pipe 3 is rotatably provided at the front ends of the arm plates 15 and 15, and the arm 7 rotates about the rotation shaft 13. Also, the pipe 3 can be suspended vertically. A pulling link 18 for pulling the other end (rear end) of the spring 8 in the retracting direction is rotatably connected to the upper portions of the arm plates 15 and 15, and the urging force from the spring 8 is applied to the arm 7.
Have been communicated to. That is, the upper part of the arm 7 is pulled backward, the front part is pulled downward, and the arm 7 is pulled downward.
3 is used as a fulcrum to rotate to a balanced position.

Also, the arm plates 15 and 15 and the tension link 1
8 is connected via a load adjusting means 9. This load adjusting means 9 has a structure in which the tension links 1 are attached to the arm plates 15 and 15.
This is for adjusting the strength at which the pipe 3 is pulled up by adjusting the position at which 8 is connected (hereinafter referred to as the connection point 44). That is, the load adjusting means 9 includes the distance from the rotating shaft 13 to the load receiving member 17, and the connecting point 4 from the rotating shaft 13.
The load adjusting bolt 38 and the load adjusting nut 39 are included in the load adjusting bolt 38.

The load adjusting bolt 38 is used for the arm connecting plate 16
The load adjusting bolt 38 is provided so as to be vertically rotatable and not to move vertically. A load adjusting nut 39 is screwed to a lower portion of the load adjusting bolt 38. The load adjusting nut 39 is provided at the front end of the pulling link 18,
By rotating the load adjusting bolt 38, the load adjusting bolt 38 is brought close to or away from the rotary shaft 13 which is a fulcrum, and the connecting point 44 is brought close to or away from the rotary shaft 13.

One end of a wire 27 of a travel transmission wire 24 described later is connected to the front end of the load receiving member 17.

The spring 8 is a coil spring that pulls the upper part of the arm 7 and biases the pipe 3 upward. One end (front end) of the spring 8 is seated on the seat plate 14, and the other end (rear end) is directed rearward. It is provided. The rear end of the tension link 18 is connected to the rear end of the spring 8 via a spring receiving plate 21 so that the rear end of the spring 8 is pulled forward. The periphery of the spring 8 is surrounded by the spring case 40.

The spring hanger 1 also has a pipe 3
A travel indicator 25 for displaying the vertical movement position of the is connected. The travel indicator 25 is installed in advance on the handrail 42 of the scaffold 41 near the spring hanger 1, and is connected to the spring hanger 1 via the travel transmission wire 24. Travel indicator 25
Is mainly composed of a main body 28, a movement indicating needle 29, and a designated position correcting spring 30.

The main body 28 is a case which guides the movement indicating needle 29 so as to be slidably surrounded, and serves as a reference for indicating the position of the pipe 3, and has a vertically long elliptic cylindrical shape.
The inside of the main body 28 is hollow, and its inner surface 31 is smoothly finished so that the movement indicating needle 29 can slide smoothly. A slit 33 is formed on the side surface 32 of the main body 28 so that the position of the movement indicating needle 29 can be seen from the outside, and the side surface 32 at the edge of the slit 33 quantitatively indicates the position of the movement indicating needle 29. Is provided with a scale 34.

The movement indicator needle 29 is for indicating the movement position of the pipe 3, and is provided so as to be vertically movable in the main body 28. The movement indicator needle 29 is formed by providing an indicator needle 36 that indicates the movement position of the pipe 3 on an elliptic cylinder-shaped movable body 35 that slides in the body 28, and the indicator needle 36 can be seen from the slit 33 of the body 28. It is provided at the position, and a sharp tip is attached to the scale 34 so that the scale 34 can be accurately pointed.
It is provided toward the 4 side.

The pointing position correction spring 30 is a coil spring for preventing the wire 27, which will be described later, from slackening when the pipe 3 is raised and for keeping the pointing position of the movement pointing needle 29 in the main body 28 accurately. It is provided so as to be sandwiched between the inner surface of the upper end (not shown) and the upper end surface 37 of the movement indicating needle 29. The pointing position correction spring 30 is a spring having a minimum force that does not cause looseness from one end to the other end of the wire 27, and always moves the pointing needle 29 regardless of the position of the pointing needle 29 in the main body 28. It is formed so as to push downward.

The travel transmission wire 24 is for transmitting the movement of the pipe to the travel indicator 25, and is composed of a tube 26 and a wire 27 and is generally called Bowden wire.

The tube 26 slidably surrounds the wire 27, and both ends of the wire 27 are appropriately extended from both ends thereof. Also, tube 2
6 has a constant length at all times, and is formed so that its length does not change even if it receives a force in the contracting direction. One end of the tube 26 is fixedly provided at the front end of the upper mounting member 12 which is a fixed part of the spring hanger 1 with an opening (not shown) facing downward, and the other end of the tube 26 is provided with a travel indicator 25. It is fixedly provided on the main body 28 of the.

The wire 27 is formed to be longer than the tube 26 so as to extend from both ends of the tube 26 by an appropriate length.
One end thereof is vertically slidably pierced through the front end of the upper mounting member 12 and is attached to the front end of a load receiving member 17 which is a movable support portion of the spring hanger 1. Wire 27
The other end of is passed through the main body 28 of the travel indicator 25 slidably and is connected to the movement indicating needle 29.

Next, the operation will be described.

When a downward force is applied to the boiler pipe 3, a downward force is applied to the front end of the arm 7 together with the turnbuckle 2. Since the center of the lower part of the arm 7 is pivotally supported by the rotary shaft 13, a force is applied to the arm 7 to rotate counterclockwise (in FIG. 1) about the rotary shaft 13. A pulling link 18 is connected to the upper end of the arm 7, and the pulling link 18 is pulled backward by the spring 8. Therefore, the pulling link 18 pulls the arm 7 in a direction opposite to the direction of the force applied to the arm 7. . Therefore, the arm 7
Rotates to a position where the downward force acting on the pipe 3 and the tensile force of the spring 8 are balanced. At this time, the pipe 3 descends by the amount of rotation of the arm 7, and the spring 8
The rear end shrinks toward the front end.

A wire 27 connected to the load receiving member 17
Is pulled downward with the rotation of the arm 7, and the movement indicator needle 29 connected to the other end of the wire 27 goes against the urging force of the indicated position correction spring 30 and travel indicator 25.
Moves upward in the body 28 of the. At this time, since the upper mounting member 12 (fixed portion) of the spring hanger 1 and the main body 28 of the travel indicator 25 are connected by the tube 26, the length of the wire 27 between them does not change, The movement indicator needle 29 rises by the distance that the pipe 3 has descended. Then, the indicator needle 36 will point to a position corresponding to the moving distance of the pipe 3 on the scale 34.

When the position of the pipe 3 indicated by the indicating needle 36 exceeds or is about to exceed a predetermined allowable range, the load adjusting bolt 38 is rotated to move the connecting point 44 from the rotating shaft 13. Separate. By doing so, the ratio of the distance from the load receiving member 17 to the rotary shaft 13 and the distance from the connection point 44 to the rotary shaft 13 changes, and the pipe 3 is pulled back upward by the leverage principle.

When the upward force is applied to the boiler pipe 3, the downward force applied to the front end of the arm 7 together with the turnbuckle 2 is weakened, and the spring 8 is extended accordingly. At this time, the arm 7 rotates clockwise (in FIG. 1) by the amount of extension of the spring 8 about the rotation shaft 13. Wire 2 connected to load receiving member 17
7 is returned upward as the arm 7 is rotated, and the travel indicator 25 is moved by the biasing force of the pointing position correction spring 30.
Moved to the side. The movement indicating needle 29 connected to the other end of the wire 27 descends inside the main body 28 of the travel indicator 25 as the indicated position correcting spring 30 extends. Then, the indicator needle 36 will point to a position corresponding to the moving distance of the pipe 3 on the scale 34.

When the position of the pipe 3 indicated by the indicating needle 36 exceeds or is about to exceed a predetermined allowable range, the load adjusting bolt 38 is moved in the direction opposite to the case where the pipe 3 is lowered. Is rotated to bring the connection point 44 close to the rotation shaft 13. By doing so, the pipe 3 is pulled back by the lever principle.

Since the travel transmission wire 24 for transmitting the pipe movement amount is connected to the spring hanger 1 and the travel indicator 25 is connected to the other end of the travel transmission wire 24 as described above, it is possible to go to the position where the travel indicator 25 is installed. For example, the travel of the pipe 3 can be accurately and easily read without going to the installation position of the spring hanger 1.

Since the travel indicator 25 is installed on the scaffold 41 near the pipe 3, the travel of the pipe 3 can be read from the normal scaffold 41, and it is not necessary to provide a dedicated scaffold for approaching the spring hanger 1. .

The travel transmission wire 24 is composed of a tube 26 and a wire 27. One end of the wire 27 is connected to the load receiving member 17 (movable support portion) of the spring hanger 1 and one end of the tube 26 is connected to the spring hanger 1. Since the other end of the tube 26 is connected to the main body 28 of the travel indicator 25 and the other end of the wire 27 is connected to the movement indicating needle 29 of the travel indicator 25 by connecting to the upper mounting bracket 12 (fixed part), it is simple. With the configuration, the travel of the pipe 3 can be read accurately, and when changing the installation position of the travel indicator 25, it is sufficient to simply move the travel indicator 25, and the travel indicator 25 can be easily moved.
The installation position of can be changed.

The position at which one end of the wire 27 is connected may be any movable support part of the spring hanger 1 other than the load receiving member 17, and the position at which one end of the tube 26 is connected may be a spring other than the upper mounting member 12. It may be any fixed part of the hanger 1.

The movable support means a member that moves when the pipe 3 moves up and down. Specifically, the turnbuckle 2, the arm 7, the load receiving member 17, and the pulling link 1 are used.
8, the spring receiving plate 21 and the like. The fixed portion refers to a member that does not move even when the pipe 3 moves up and down, and specifically includes the suspension 4, the frame 6, the seat plate 14, the upper mounting bracket 12, and the like.

Further, the travel transmission wire may be only a wire having no tube. In this case, the travel indicator 25 may be fixed at a predetermined position, and the wire may be hung on a pulley or the like to prevent the wire connecting the spring hanger 1 and the travel indicator 25 from slackening.

[0038]

In summary, according to the present invention, the following excellent effects can be obtained.

(1) According to the structure described in claim 1, the travel of the pipe can be accurately and easily read without going to the installation position of the spring hanger.

(2) According to the configuration of claim 2, the travel of the pipe can be read from the existing scaffold.

(3) According to the third aspect of the invention, the travel of the pipe can be accurately read with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a side view of a spring hanger showing a preferred embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a side view of a conventional spring hanger.

[Explanation of symbols]

 1 Spring Hanger 2 Turnbuckle (Movable Support Part) 3 Piping 4 Lifting Tool (Fixed Part) 6 Frame (Fixed Part) 7 Arm (Movable Support Part) 12 Upper Mounting Bracket (Fixed Part) 14 Seat Plate (Fixed Part) 17 Load Receiving member (movable support part) 18 Tensile link (movable support part) 21 Spring receiving plate (movable support part) 24 Travel transmission wire 25 Travel indicator 26 Tube 27 Wire 29 Movement indicator needle 41 Scaffold

Claims (3)

[Claims] 1. A hanger travel reading device for suspending a pipe moving vertically due to thermal expansion or the like with a spring hanger and detecting a moving amount of the pipe, a travel transmission wire for transmitting the pipe moving amount to the spring hanger. And a travel indicator for displaying the above movement amount is connected to the other end of the transmission wire. 2. The hanger travel reading device according to claim 1, wherein the travel indicator is installed on a scaffold near a pipe. 3. The travel transmission wire comprises a tube and a wire, and one end of the wire is connected to a movable support portion that supports piping of a spring hanger, and one end of the tube is connected to a fixed portion of the spring hanger. 3. The hanger travel reading device according to claim 1, wherein the other end of the tube is connected to the travel indicator and the other end of the wire is connected to the movement indicating needle of the travel indicator.