JP7334101B2 - pressure tester - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure tester used to test the water pressure resistance of a cooling water path built into a water-cooled bearing such as the bearing of a split roll for conveying high-temperature objects.

In an area where hot slabs are conveyed in a steelworks, for example, split rolls 500 for conveying hot materials as shown in FIG. 15 are used. As shown in FIGS. 15 and 16, in the split roll 500 for conveying hot objects, three rolls 501a, 501b, and 501c are mounted on a water-cooled bearing stand 505 so as to form the same straight line. Water-cooled bearings 10 are arranged at both ends of 501a, 501b, and 501c.

In addition, as shown in FIG. 15, in the split roll 500 for conveying high-temperature objects in operation, the water-cooled bearings 10 arranged at both ends of the rolls 501a, 501b, and 501c are respectively covered with detachable covers 13. .

As shown in FIGS. 17 to 20, the water-cooled bearing 10 has a built-in water passage 11 for circulating cooling water, and a plurality of openings 12, 12 communicating with the water passage 11 are formed in the bottom surface 14. ing. As shown in FIGS. 17 and 18, the water-cooled bearing 10 has a feed port 16 for supplying lubricating oil to the bearing surface 15 and an outlet port 16 for discharging the lubricating oil circulating on the bearing surface 15 at the lower front of the water-cooled bearing 10 . An oil drain port 17 is provided. Further, a groove 19 parallel to the axis 10c of the water-cooled bearing 10 is provided on the bottom surface 14 of the water-cooled bearing 10, and female screw holes 18, 18 are formed at symmetrical positions with the groove 19 interposed therebetween. is provided.

As shown in FIGS. 19 and 20, the water passage 11 has vertical portions 11a, 11a vertically rising from the openings 12, 12 of the bottom surface 14, and horizontal portions 11a, 11a extending from the upper ends of the vertical portions 11a, 11a in the left and right side directions, respectively. It is provided with portions 11b, 11b, and an inverted U-shaped peripheral portion 11c that surrounds the outer peripheral portion of the bearing surface 15 and communicates the horizontal portions 11b, 11b.

As shown in FIG. 15, cooling water is supplied from the direction of the arrow V to the high-temperature object conveying split roll 500 in operation, and the supplied cooling water is applied to the water-cooled bearing at the left end of the roll 501a in FIG. 10 (see FIG. 20) flows into the vertical portion 11a from one opening 12 and flows out of the other opening 12 via the horizontal portion 11b, the circumferential portion 11c, the other horizontal portion 11b and the vertical portion 11a. .

The cooling water flowing out from the water-cooled bearing 10 at the left end of the roll 501a flows in the water pipe 502 and flows in from one opening 12 of the water-cooled bearing 10 (see FIG. 20) at the right end of the roll 501a. 11, flows out from the other opening 12, flows in from one opening 12 of the water-cooled bearing 10 (see FIG. 20) at the left end of the adjacent roll 501b, goes around the water passage 11, and flows to the other. flows out from the opening 12 of the

The cooling water flowing out from the water-cooled bearing 10 at the left end of the roll 501b flows through the water pipe 503 and flows in from one opening 12 of the water-cooled bearing 10 (see FIG. 20) at the right end of the roll 501b. It flows through the water pipe 504 via the same route as described above, and finally flows out from the other opening 12 of the water-cooled bearing 10 (see FIG. 20) at the right end of the roll 501c, in the direction of the arrow W. drained to

By the way, regarding the water-cooled bearing 10 constituting the high-temperature object conveying split roll 500 shown in FIG. The water-cooled bearing 10 of the rear) is subjected to a pressure resistance test to confirm the water pressure resistance of the water conduit 11 .

In a conventional withstand voltage test, a test jig 20 as shown in FIG. 21 is used. The test jig 20 includes a support plate 21 on which the water-cooled bearing 10 can be placed, and a water supply pipe 22 and a drain pipe 23 communicating with a plurality of water passages (not shown) provided in the support plate 21. In addition, an open/close valve 26 is attached in the middle of the water supply pipe 22 . A connecting portion 24 communicating with the water supply pipe 22 and a connecting portion 25 communicating with the drain pipe 23 are formed on the upper surface of the support plate 21 . Further, a plurality of through holes 27, 27 are formed in the support plate 21. As shown in FIG.

As shown in FIG. 21, when the water-cooled bearing 10 is placed on the support plate 21 of the test jig 20, the plurality of openings 12, 12 of the bottom surface 14 of the water-cooled bearing 10 shown in FIG. 21, and likewise, the plurality of female screw holes 18, 18 of the bottom surface 14 communicate with the plurality of through holes 27, 27 of the support plate 21 coaxially.

After placing the water-cooled bearing 10 on the support plate 21 of the test jig 20 in this way, the male screws 28, 28 are inserted from the lower surface of the support plate 21 toward the through holes 27, 27, and The water-cooled bearing 10 is fixed to the support plate 21 when it is screwed into the screw holes 18 and 18 and tightened.

After that, the on-off valve 26 is opened to fill the water passage 11 (see FIG. 20) of the water-cooled bearing 10 with test water pressure-fed from a predetermined water supply source (not shown) through the water supply pipe 22. , the drainage pipe 23 side is closed, a predetermined water pressure is maintained in the water passage 11 for a predetermined time, and the presence or absence of water leakage from the water passage 11 during the holding is confirmed to determine the pass/fail of the pressure resistance test. It is done.

On the other hand, although the technical field is different from the present invention, as equipment used for pressure resistance tests such as high-pressure water hose and high-pressure water hose terminal part, for example, "Water pipe pressure tester for fire fighting" described in Patent Document 1 , and "fire-fighting hose end pressure tester" described in Patent Document 2.

JP-A-2004-154332 JP 2005-221475 A

As shown in FIG. 21, in the pressure resistance test using the conventional test jig 20, only one water-cooled bearing 10 can be tested for pressure resistance with one test jig 20, so the efficiency of the test work is reduced. There is the problem of being bad.

When the water-cooled bearing 10 is set in the test jig 20, the water-cooled bearing 10 must be turned upside down so that the bottom surface 14 (see FIG. 18) faces upward. Since screwing work, etc., cannot be performed, a large amount of labor is also spent on reversing work.

Furthermore, during the pressure resistance test by the test jig 20, in order to hold the mutually integrated water-cooled bearing 10 and the test jig 20 in a predetermined posture, it is necessary to separately provide posture holding means. The work also requires a lot of effort.

On the other hand, the “fire-fighting water pipe pressure tester” described in Patent Document 1 and the “fire-fighting hose end pressure tester” described in Patent Document 2 are used for fire-fighting water pipes and fire-fighting hose terminals, respectively. Since it is specialized for conducting pressure resistance tests, it cannot be used for pressure resistance tests of water-cooled bearings shown in FIGS.

Therefore, the problem to be solved by the present invention is to improve the efficiency of the pressure resistance test of the water-cooled bearing, to enable easy and safe attachment and detachment of the water-cooled bearing, and to provide a posture holding means for the water-cooled bearing. To provide a pressure resistance tester that does not need to be provided separately.

The pressure resistance tester according to the present invention is
A pressure resistance tester for testing the pressure resistance function of the water passage of a water-cooled bearing having a structure in which a water passage for circulating cooling water is built in and a plurality of openings communicating with the water passage are formed on the bottom surface. hand,
a test stand on which a plurality of water-cooled bearings can be placed;
fixing means for detachably fixing the water-cooled bearing to the test stand;
holding means for holding the test table in a fixed position;
a plurality of connection ports formed on the upper surface of the test stand at positions connectable to the plurality of openings of the water-cooled bearing placed on the test stand;
a liquid supply path provided in the test stand for filling the test liquid in the water passage of the water-cooled bearing via the connection port.

In the pressure tester, the liquid supply path can be provided inside the test table.

In the pressure tester, the liquid supply path may be provided below the test table.

In the pressure resistance tester, as the fixing means, a female screw hole opened on the lower surface side of the water-cooled bearing and a male screw that penetrates the test stand and can be screwed into the female screw hole are provided. be able to.

The pressure tester may be provided with wheels capable of transporting the test stand and the holding means.

According to the present invention, the pressure resistance test of a water-cooled bearing can be made more efficient, the water-cooled bearing can be attached and detached easily and safely, and there is no need to separately provide a posture holding means for the water-cooled bearing. machine can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially-omitted plan view which shows the pressure|voltage resistance test machine which is embodiment of this invention. FIG. 2 is a partially omitted side view of the pressure tester shown in FIG. 1 as viewed in the direction of arrow P; (a) is a front view seen from the direction of line AA in FIG. 2, (b) is a partially omitted cross-sectional view taken along line BB in FIG. 2, and (c) is a view in FIG. It is a partially omitted cross-sectional view taken along line CC. 2 is a partially omitted perspective view showing a process of setting a water-cooled bearing on a test stand of the pressure resistance tester shown in FIG. 1; FIG. FIG. 2 is a partially omitted perspective view showing a state in which a water-cooled bearing is set on a test stand of the pressure resistance tester shown in FIG. 1 and mounted on a carriage. FIG. 6 is a partially omitted side view of the withstand voltage tester shown in FIG. 5 ; FIG. 7 is a partially omitted front view of the withstand voltage tester viewed from the direction of arrow Q in FIG. 6 ; FIG. 10 is a partially cutaway side view showing a state in which a water-cooled bearing is set on a test stand of a pressure resistance tester according to another embodiment of the present invention; FIG. 9 is a partially cutaway front view seen from the direction of an arrow R in FIG. 8; FIG. 9 is a partially omitted plan view of the withstand voltage tester viewed from line DD shown in FIG. 8; FIG. 9 is a partially omitted bottom view of the withstand voltage tester viewed from the direction of arrow S in FIG. 8 ; FIG. 10 is a partially cutaway side view showing a state in which a water-cooled bearing is set on a test stand of a pressure resistance tester according to another embodiment of the present invention; FIG. 13 is a partially omitted plan view of the counterpressure tester as seen from line EE in FIG. 12; FIG. 13 is a partially omitted bottom view of the withstand voltage tester viewed from the direction of arrow T in FIG. 12 ; It is a partially-omitted perspective view which shows the split roll for high temperature object conveyance. FIG. 16 is an enlarged view, with partial omission, of the high-temperature object conveying split roll viewed from the direction of arrow U in FIG. 15 ; FIG. 17 is a front view of a water-cooled bearing that constitutes the split roll for conveying hot objects shown in FIG. 16 ; FIG. 18 is a partially omitted bottom view of the water-cooled bearing shown in FIG. 17; FIG. 18 is a partially omitted cross-sectional view taken along line FF in FIG. 17; FIG. 20 is a partially omitted cross-sectional view of the water-cooled bearing taken along line GG in FIG. 19; FIG. 18 is a partially omitted perspective view showing a process of setting the water-cooled bearing shown in FIG. 17 in a conventional pressure tester;

1 to 14, withstand voltage testers 100, 200, and 300, which are embodiments of the present invention, will be described below.

First, the withstand voltage tester 100 will be described based on FIGS. 1 to 7. FIG. As shown in FIGS. 4 and 5, the pressure tester 100 according to this embodiment is a device capable of simultaneously testing the pressure resistance function of the water passages 11 of a plurality of water-cooled bearings 10 . Since the water-cooled bearing 10 has the same structure and function as the water-cooled bearing 10 described above with reference to FIGS. 17 to 20, description thereof will be omitted.

As shown in FIGS. 1 to 5, the pressure tester 100 includes a plurality of test stands 1L and 1R on which a plurality of water-cooled bearings 10 can be placed, and the water-cooled bearings 10 can be detachably attached to the test stands 1L and 1R. A female screw hole 18 and a male screw 28 which are fixing means for fixing, a holding plate 2 and a carriage 3 which are holding means for keeping the test tables 1L and 1R in a fixed posture, and the test table 1L on the upper surface 1a of the test tables 1L and 1R. , 1R, a plurality of connection ports 4, 4 opened at positions connectable to the plurality of openings 12, 12 (see FIG. 18) of the bottom surface 14 of the water-cooled bearing 10 placed on the 1R, and the connection ports 4, 4, 4, a liquid supply path 5 built into the test stands 1L, 1R for filling the water passage 11 of the water-cooled bearing 10 with the test liquid.

A plurality of through-holes 6 for inserting male screws 28 are formed in the test tables 1L and 1R, and ridges 7 are provided on the upper surfaces 1a of the test tables 1L and 1R, respectively. When the water-cooled bearing 10 is set on the test tables 1L and 1R, the concave groove 19 (see FIG. 17) of the bottom surface 14 of the water-cooled bearing 10 and the ridge 7 are fitted to each other.

As shown in FIGS. 1 and 2, the pressure tester 100 has two test tables 1L and 1R arranged on the same plane, and the test tables 1L and 1R are connected by two tubular bodies 8 and 8. ing. In FIG. 1, a liquid supply pipe 21 is connected to the liquid supply path 5a built in the left side of the test table 1L, and a drain pipe 23 is connected to the liquid supply line 5d built in the right side of the test table 1R. . The liquid supply path 5b built in the right side of the test table 1L and the liquid supply path 5c built in the left side of the test table 1R are communicated with each other by a liquid passage pipe 22 inserted through the tubular body 8. . As shown in FIG. 4, the liquid supply pipe 21 and the liquid discharge pipe 23 are provided with on-off valves 21v and 23v, respectively.

As shown in FIGS. 5 to 7, in the pressure tester 100, the lower surfaces of the test tables 1L and 1R are fixed on the holding plate 2 erected on the loading portion 32 of the carriage 3 having a plurality of wheels 31. As a result, the test tables 1L and 1R are held in a fixed posture (horizontal posture). Since the wheels 31 of the carriage 3 are rotatable, an operator (not shown) can carry the pressure tester 100 to any place by grasping the handle 33 and pushing or pulling it.

Here, how to use the withstand voltage tester 100 will be described based on FIGS. 4 and 5. FIG. As shown in FIG. 4, the water-cooled bearings 10 are placed on the upper surfaces 1a of the test tables 1L and 1R, respectively, and the male screws 28 are inserted from below the test tables 1L and 1R toward the through holes 6, and the water-cooled bearings 10 are , the water-cooled bearing 10 is fixed to the test tables 1L and 1R. At this time, as shown in FIG. 5, due to the presence of the holding plate 2, a predetermined gap is formed between the lower surfaces of the test tables 1L and 1R and the loading portion 32 of the carriage 3. The screwing work can be done easily and safely.

After the plurality of water-cooled bearings 10 are set on the test tables 1L and 1R, the liquid supply pipe 21 is connected to the liquid supply means (eg, water supply equipment), and the drain pipe 23 is connected to the drain means (eg, drainage equipment). ), the on-off valves 21 v and 23 v are opened to allow the test liquid (for example, water) to flow into the water passages 11 (see FIG. 20) of the plurality of water-cooled bearings 10 .

When it is confirmed that the water passages 11 of all the water-cooled bearings 10 are filled with the test liquid, the on-off valve 23v is closed, and the water passages 11 of the plurality of water-cooled bearings 10 are brought into a state where a predetermined liquid pressure is generated. . This state is maintained for a certain period of time, and the presence or absence of leakage from the water-cooled bearings 10 is checked to determine whether the pressure resistance test is successful.

After the pressure resistance test is completed, the on-off valve 21v is closed, the on-off valve 23v is opened, and the test liquid in the water passage 11 of the water-cooled bearing 10 is discharged. After that, the male screw 28 is loosened and removed from the female screw hole 18 of the water-cooled bearing 10, so that the water-cooled bearing 10 can be removed from the test tables 1L and 1R.

In this manner, the pressure tester 100 can simultaneously perform a pressure test on a plurality of water-cooled bearings 10, thereby making the pressure test more efficient. Further, in the pressure tester 100, the water-cooled bearing 10 can be attached and detached while maintaining the upright posture with respect to the upper surfaces 1a of the test tables 1L and 1R held in a horizontal state. The work can be done easily and safely, and there is no need to separately provide means for maintaining the attitude of the water-cooled bearing.

Although the withstand voltage tester 100 has two test tables 1L and 1R, it is not limited to this, and three or more test tables can be provided.

Next, the withstand voltage testers 200 and 300 will be described with reference to FIGS. 8 to 11 and 12 to 14. FIG. In addition, in the components of the withstand voltage testers 200 and 300, the same components as the components of the withstand voltage tester 100 described above are denoted by the same reference numerals as those described in FIGS. 1 to 7, and the description thereof is omitted. .

The pressure resistance tester 200 shown in FIGS. 8 to 11 includes one test stand 201 on which a plurality (four) of water-cooled bearings 10 can be placed, and a plurality of bearings placed on an upper surface 201a of the test stand 201 A liquid supply path (liquid supply pipe 202, drain pipe 203) for filling the test liquid in the water passage 11 (see FIG. 20) of the water-cooled bearing 10 is provided under the test table 201 in an exposed state. . On-off valves 202v and 203v are provided at the ends of the liquid supply pipe 202 and the liquid discharge pipe 203, respectively.

The means for fixing the water-cooled bearing 10 to the test table 201 is the female screw hole 18 and the male screw 28 as in the pressure tester 100 described above. A tubular spacer 29 is fitted between the screw 28 and the head.

After setting a plurality of water-cooled bearings 10 on the upper surface 201a of the test stand 201, the ends of the liquid supply pipe 202 and the liquid discharge pipe 203 are connected to the liquid supply means and the liquid discharge means, respectively, and the on-off valves 202v and 203v are opened. After filling the water passages 11 (see FIG. 20) of the plurality of water-cooled bearings 10 with the test liquid, the on-off valve 203v of the drain pipe 203 is closed, and the water passages 11 of the plurality of water-cooled bearings 10 are filled with a predetermined liquid. A state in which pressure is generated. By maintaining this state for a certain period of time and checking whether or not there is leakage from the water-cooled bearing 10, it is possible to determine whether or not the pressure resistance test has passed.

In the pressure tester 200, a liquid supply path (liquid supply pipe 202, liquid drain pipe 203) is provided in an exposed state below the test table 201, and communicates the water passages 11 of the plurality of water-cooled bearings 10 in parallel. Hydraulic pressure can be applied in any state. Since the liquid supply pipe 202 and the liquid discharge pipe 203 have the same structure and function, they can be used in reverse.

The withstand voltage tester 200 exhibits the same functions and effects as the withstand voltage tester 100 described above.

Next, the withstand voltage tester 300 will be described with reference to FIGS. 12 to 14. FIG. 8 to 11, the same reference numerals as in FIGS. 8 to 11 are assigned to the components of the withstand voltage tester 300 that are the same as those of the withstand voltage tester 200 described above, and the description thereof is omitted.

The pressure resistance tester 300 shown in FIGS. 12 to 14 includes a single test table 301 on which a plurality (three) of water-cooled bearings 10 can be placed. A liquid supply path (liquid supply pipe 302, liquid drain pipe 303) for filling the test liquid in the water passage 11 (see FIG. 20) of the water-cooled bearing 10 is provided under the test table 301 in an exposed state. . On-off valves 302v and 303v are provided at the ends of the liquid supply pipe 302 and the liquid discharge pipe 303, respectively.

After setting a plurality of water-cooled bearings 10 on the upper surface 301a of the test table 301, the ends of the liquid supply pipe 302 and the liquid discharge pipe 303 are connected to the liquid supply means and the liquid discharge means, respectively, and the on-off valves 302v and 303v are opened. After filling the water passages 11 (see FIG. 20) of the plurality of water-cooled bearings 10 with the test liquid, the on-off valve 303v of the liquid drain pipe 303 is closed, and the water passages 11 of the plurality of water-cooled bearings 10 are filled with a predetermined liquid. A state in which pressure is generated. By maintaining this state for a certain period of time and checking whether or not there is leakage from the water-cooled bearing 10, it is possible to determine whether or not the pressure resistance test has passed.

The functions and effects of the withstand voltage tester 300 are the same as those of the withstand voltage testers 100 and 200 described above, but the advantage of the withstand voltage tester 300 is that it is more compact than the withstand voltage tester 200 .

The withstand voltage testers 100, 200, and 300 described based on FIGS. 1 to 14 are examples of the withstand voltage tester according to the present invention, and the withstand voltage tester according to the present invention is the withstand voltage tester 100 described above. , 200, 300.

INDUSTRIAL APPLICABILITY The pressure tester according to the present invention can be widely used in industrial fields such as ironworks and other manufacturing industries that use split rolls for conveying hot objects.

1L, 1R, 201, 301 test stand 1a, 201a, 301a upper surface 2 holding plate 3 carriage 4 connection port 5, 5a, 5b, 5c, 5d liquid supply path 6 through hole 7 protruding portion 8 tubular body 10 water-cooled bearing 11 Water passage 11a Vertical portion 11b Horizontal portion 11c Circulating portion 12 Opening 13 Cover 16 Oil supply port 17 Oil drain port 18 Female screw hole 19 Groove 21 Liquid supply pipe 21v, 23v, 202v, 203v, 302v, 203v On-off valve 22 Liquid passage Pipe 23 Drainage pipe 28 Male screw 30 Truck 31 Wheel 32 Loading part 33 Handle 201b, 301b Lower surface

Claims (5)

A pressure resistance tester for testing the pressure resistance function of the water passage of a water-cooled bearing having a structure in which a water passage for circulating cooling water is built in and a plurality of openings communicating with the water passage are formed on the bottom surface. hand,
a test stand on which a plurality of water-cooled bearings can be placed;
fixing means for detachably fixing the water-cooled bearing to the test stand;
holding means for holding the test table in a fixed position;
a plurality of connection ports formed on the upper surface of the test stand at positions connectable to the plurality of openings of the water-cooled bearing placed on the test stand;
a liquid supply path provided in the test stand for filling the water passage of the water-cooled bearing with a test liquid via the connection port;
a liquid passage pipe connected to one end of the liquid supply path; a drain pipe connected to the other end of the liquid supply path;
an on-off valve provided in the liquid passage pipe and the drain pipe, which is closed so that a predetermined liquid pressure is generated in the water passage by the test liquid;
pressure tester with 2. A pressure resistance tester according to claim 1, wherein said liquid supply path is provided inside said test stand. 2. A pressure resistance tester according to claim 1, wherein said liquid supply path is provided below said test stand. 4. The method according to any one of claims 1 to 3, wherein the fixing means includes a female screw hole formed on the lower surface side of the water-cooled bearing and a male screw that penetrates the test stand and can be screwed into the female screw hole. The pressure tester according to any one of the items. The pressure resistance tester according to any one of claims 1 to 4, further comprising wheels capable of transporting said test stand and said holding means.

Images