KR20200069102A - Valve for check device and valve system of brake hose check apparatus equipped with check valve - Google Patents

Abstract

The present invention relates to a valve which controls the flow of compressed air of high and low pressures by being applied to a brake hose pressure gauge capable of automatically performing a pressure test by being compatible with brake hoses of various specifications; and to a valve system of a pressure gauge having the valve. The valve system of a pressure gauge of the present invention comprises: an injection nozzle (14) fastened to a first arm to inject compressed air; a blocking valve (24) closing a second arm; a brake hose (1) connected to the injection nozzle (14) and supplying the compressed air of high and low pressures by an on/off operation of high and low pressure valves (300, 300′); and a pneumatic inspection unit (30) provided to measure pressure leakage and clogging defects with high and low pressure sensors (33, 38). The high and low pressure valves (300, 300′) include: a valve cylinder (320) provided with a supply port (322) and a discharge port (324); a needle seat unit (340) provided in the valve cylinder (320) to have a through-hole (342) formed at the center thereof; a needle (360) inserted into the valve cylinder (320) to be linearly transported by a driving cylinder (310), and provided to open and close the through-hole (342) of the needle seat unit (340); and a ceramic ball (380) detachably installed in an intaglio groove of an end of the needle (360) to be in direct contact with the through-hole (342).

Description

Valve for check pressure device and valve system of brake hose equipped with the valve {Valve for check device and valve system of brake hose check apparatus equipped with check valve}

The present invention is a valve system for a pressure gauge device and a brake hose pressure gauge equipped with the valve, which will be described in more detail and applied to a brake hose pressure gauge device capable of automatically performing pressure test in compliance with various types of brake hoses. It relates to a valve system of a pressure control device equipped with a valve and a valve for controlling the flow of compressed air of high and low pressure.

In general, the brake hose, which is one of the components constituting the brake system of a vehicle, is a pipe for transmitting hydraulic pressure between a chassis and a wheel, and is configured by selectively combining a pimel bracket and an eye joint bracket on both ends of the hose. However, since the shape, outer diameter, angle, and length of each bracket are provided for each vehicle type, the work artist assembles the brake hose and bracket configuration by hand, as well as the pressure leak tester that is appropriately set according to the type of brake hose. After the first inspection by injecting it, it was re-injected into the clogging inspection device, followed by a cumbersome problem that each of the second inspections had to be performed manually.

Accordingly, in the prior art disclosed in Patent Publication No. 10-2017-0028519, receiving the hose fitting from the supply unit to inspect the concentricity of the seat surface of the hose fitting, concentricity inspection unit to distinguish good and bad products, and judged good quality from the concentricity inspection unit A complex inspection unit that distinguishes good and bad products by performing any one or more of hole inspection, nipple depth inspection, flange stamping inspection, brazing inspection, overall dimension inspection, upper whipping inspection, hole real chip inspection, and nipple defect inspection Although the technology consisting of has been previously disclosed, it is impossible to perform general-purpose work on nipples having various shapes, outer diameters, angles, and lengths by type, and in particular, there are limitations in that pressure leaks and clogging defect tests by type of fitting can be performed. .

In addition, in another prior art Patent Publication No. 10-2017-0105219, as an automatic assembly device inspection device for checking the fastening state of the hose and the bracket, the first to check the fastening state of the one end of the hose and the straight mold An inspection unit and a second inspection unit for confirming the fastening state of the other end of the hose and the curved bracket, the first inspection unit and the second inspection unit, a pressure gauge providing air pressure to the fastening portion of the hose and the bracket, the A technology including a support assembly including a pressure assembly having a rotational motor providing rotational movement power of a pressure gauge and a linear motor coupled to one side of the pressure detection assembly and providing linear movement power of the pressure detection assembly has been previously disclosed. However, this is a dedicated machine limited to the inspection that checks the connection between the hose and the bracket by providing pneumatic pressure inside the product. It is impossible to inspect for clogging defects. Not only is it easy to handle, but also the control of the high pressure of 150~170kgf requires that more valve operation force is supplied at all times.

In the present invention, in order to solve the above-mentioned problems in the prior art, a new technology was devised, and one side of the brake hose was closed or opened to the inside of the brake hose through the injection nozzle, and low pressure compressed air was injected to leak pressure. And it is an object of the present invention to provide a valve system of a brake hose pressure measuring device that can be continuously performed in a short time the clogging defect inspection process.

In addition, the ceramic ball is detachably configured at the end of the needle that controls on/off control of the supply of high pressure compressed air, and the wear rate is significantly reduced in the process of controlling the high pressure compressed air. Another object is to provide a valve system for a brake hose pressure gauge.

In the present invention as a specific means for solving the problems of the above-described invention, a valve for a pressure gauge device is configured,

A driving cylinder 310 having a through hole 311 formed to supply an operating pressure to the center, a piston 314 installed to be supported downward by an elastic body 312 inside the driving cylinder 310, and the piston 314 ) It is provided in the valve cylinder 320 and the through hole in the center provided with a connection cylinder 330 that is coupled through the center, a valve cylinder 320 provided with a supply port 322 and a discharge port 324, 342) is inserted into the needle seat portion 340 is formed, the sieve valve cylinder 320 coupled to the lower portion of the connecting rod 330, the piston 314 to elevate, the through hole of the needle seat portion 340 Needle (360) installed to open and close (342), ceramic ball (380) and valve cylinder (320) and lower part which are detachably installed at the end of the needle (360) and directly contact the through hole (342) It is characterized in that it is configured to include a closing member 370 that is screwed in to support the needle seat portion 340 from below.

In addition, a brake hose pressure measuring device is formed by fastening a first bracket (2) composed of a pimel bracket on one end of the brake hose (1), and a second bracket (3) composed of a pimel bracket or an eye joint bracket on the other end. In the valve system of the, it is fastened to the first bracket, the injection nozzle 14 for injecting compressed air, the shut-off valve 24 for closing the second bracket, and the injection nozzle 14, connected to the high , Low pressure valve (300) (300') is provided to supply high, low pressure compressed air by on/off operation to measure the pressure leak and clogging failure of the brake hose (1), and measure it with the low pressure sensors (33, 38). Composed of a pneumatic inspection unit 30, the high and low pressure valves (300) (300'), the supply cylinder 322 and the discharge port 324 is provided with a valve cylinder 320, and the valve cylinder 320 Needle seat portion 340 is provided in the center through which the through hole 342 is formed, and is inserted into the valve cylinder 320 and is linearly transported by the drive cylinder 310 and through hole of the needle seat portion 340 ( It characterized in that it comprises a needle 360 provided to open and close the 342, and a ceramic ball 380 that is detachably installed in the intaglio groove at the end of the needle 360 and directly contacts the through hole 342.

At this time, the drive cylinder 310 is the inner piston 314 is transferred downward by the elastic body 312, the through-hole 342 is always closed by the needle 360, the drive cylinder 310 is supplied to the inside It is characterized in that the needle 360 is provided to allow the pneumatic movement by opening the through hole 342 while the piston 314 is transferred upward by the pneumatic pressure.

According to the above configuration and operation, the present invention is a high pressure, low pressure compressed air is injected into the brake hose through the injection nozzle in a state where one side of the brake hose is closed or opened, and the pressure leak and clogging defect inspection process is continuously performed in a short time. It can be performed to maximize product inspection efficiency.

By breaking away from the conventional method of sealing with O-ring and installing and installing a ceramic ball at the end of the needle that controls the supply of high-pressure compressed air on/off, the wear rate is significantly reduced in the process of controlling high-pressure compressed air, which can significantly increase durability and wear. Due to this, it is possible to perform the replacement work very easily when a leak occurs, so that the replacement work can be performed quickly and conveniently.

1 is a block diagram showing the overall valve system of a brake hose pressure measuring device according to an embodiment of the present invention.
Figure 2 is a block diagram showing a pneumatic inspection unit of the valve system of the brake hose pressure measuring device according to an embodiment of the present invention.
Figure 3 is a configuration diagram showing a high, low pressure valve of the valve system of the brake hose pressure measuring device according to an embodiment of the present invention.
Figure 4 is a block diagram showing a high, low pressure valve operating state of the valve system of the brake hose pressure measuring device according to an embodiment of the present invention.
Figure 5 is a block diagram showing a high, low pressure test operating state of the valve system of the brake hose pressure measuring device according to an embodiment of the present invention.
Figure 6 is a schematic view showing a brake hose pressure gauge is applied to the valve system according to an embodiment of the present invention as a whole.
7 is a configuration diagram showing a brake hose pressure measuring device is applied to the valve system according to an embodiment of the present invention from the side.
8 is an enlarged configuration diagram showing a longitudinal axis pressure stage of a brake hose pressure gauge to which a valve system according to an embodiment of the present invention is applied.
Figure 9 is an enlarged configuration diagram showing the transverse pressure check phase of the brake hose pressure measuring device is applied to the valve system according to an embodiment of the present invention.
10 is a block diagram showing a modified example of the horizontal pressure check stage shut-off valve of the brake hose pressure measuring device to which the valve system according to an embodiment of the present invention is applied.

Hereinafter, with reference to the accompanying drawings will be described in detail for the practice of the present invention. In the description of the present invention, when it is determined that the gist of the present invention may unnecessarily obscure the related well-known functions to those skilled in the art, detailed description thereof will be omitted.

The valve system of the brake hose pressure measuring device according to the present invention is fastened to the first bracket 2 as shown in FIG. 1, and an injection nozzle 14 for inputting compressed air and a shut-off valve 24 for closing the second bracket ), connected to the injection nozzle 14, by supplying high and low pressure compressed air by on/off operation of the high and low pressure valves 300 and 300' to increase the pressure leak and clogging failure of the brake hose 1 , It consists of a pneumatic inspection unit 30 provided to be measured by a low pressure sensor (33) (38).

Figure 3 is a cross-sectional view showing the configuration of the valve for the pressure gauge provided in the present invention, the upper portion of the cylinder with the operating pressure is supplied to the driving cylinder and the lower side of the valve cylinder having a supply port 322 and a discharge port 324 It is configured to be divided into 320.

Specifically, a valve cylinder 320 provided with a supply port 322 and a discharge port 324, and a needle seat portion 340 provided in the valve cylinder 320 and having a through hole 342 in the center are formed. And, the needle 360 is inserted into the valve cylinder 320 and is linearly transported by the driving cylinder 310 and provided to open and close the through hole 342 of the needle seat portion 340, and the needle 360 end The ceramic ball 380 and the valve cylinder 320 which are detachably installed in the intaglio groove and directly contacting the through hole 342 and screwed from the bottom to support the needle seat portion 340 from below are finished members 370 It includes,

A through hole 311 is formed so that the operating pressure is supplied through the operating pneumatic line L3 to the center of the driving cylinder 310 formed on the upper side of the valve cylinder 320, and the through hole 311 has the needle at the bottom. A connecting rod 330 coupled with 360 is provided, which is coupled through the center of the piston 314.

In the upper center of the connecting rod 330, a supply passage 331 for supplying the operating pressure introduced into the through hole 311 to the space 315 to be described below is formed, and the inner side of the center of the piston 314 is formed. In the connection passage 314a connecting the supply passage 331 and the space 315 formed on the bottom surface of the piston is formed.

Therefore, when the operating pressure is supplied to the driving cylinder 310, the supply channel 331 of the connecting rod 330 and the connecting channel 314a formed in the piston pass through the inner bottom surface of the driving cylinder 310 and the bottom surface of the piston 314. Pressure is provided to the space portion 315 formed therebetween.

Since the piston 314 is supported in the downward direction by the elastic body 312 installed therein, the through hole 342 is always closed by the needle 360 as shown in FIG. 4(a), but inside the driving cylinder 310 When the working pressure is supplied and the pressure of the space portion 315 is greater than the force of the elastic body 312, the connecting rod 330 rises together with the piston, so the needle coupled to the lower side of the connecting rod as shown in FIG. 4(b) ( 360) This through-hole 342 is opened to allow pneumatic movement.

As described above, since the closing operation force of the needle 360 always acts by the elastic body 312, the opening operation force of the needle 360 is generated by temporarily supplying hydraulic pressure into the driving cylinder 310 only during the opening operation, so 150-170 kgf In order to prevent the high pressure compressed air from moving, a separate constant high pressure drive source is unnecessary, thereby simplifying the equipment.

3, a rubber seal 316 is installed on the outer surface of the piston 314, and the rubber seal 314 is pressed against the inner wall of the driving cylinder 310 to prevent easy tearing or wear. A small amount of hydraulic oil is periodically and automatically dropped on the (L3) phase.

In addition, a ceramic ball 380 having excellent abrasion resistance is detachably provided at an end of the needle 360 that opens and closes the through hole 342 of the needle seat portion 340, so that the wear rate is significantly reduced in the process of controlling the compressed air at high pressure. The durability of the valve can be increased, and if a leak occurs due to long use, the ceramic ball 380 can be easily replaced by simply separating the closing member 370 and the needle seat part 340 of the valve cylinder 320 in turn. It has the advantage of not only reducing the maintenance cost but also the maintenance workability.

In addition, the discharge port 324 of the high pressure valve 300 is connected to the high pressure flow path 32a of the pressure chamber 32, and the low pressure valve 300 ′ is supplied to the low pressure flow path 32b of the pressure chamber 32. Port 322 is connected. Thus, a single valve can be used for both high and low pressure valves 300 and 300' while supplying high pressure compressed air through the supply port 322 of the high pressure valve 300 and the supply port 322 of the low pressure valve 300'. ), there is an advantage that low pressure compressed air injection is made in combination.

The pneumatic inspection unit 30 according to the present invention is connected to the injection nozzle 14 to supply high and low pressure compressed air, and is provided to measure pressure leak and clogging defects in the brake hose 1.

In FIG. 2, the pneumatic inspection unit 30 is connected to the injection nozzle 14, the main conduit 31 and the main conduit 31, high and low pressure flow paths 32a and 32b are formed while high pressure is formed. A pressure chamber (32) in which the sensor (33) is installed, and a high pressure valve (300) controlling on/off control of high pressure compressed air movement supplied through the high pressure line (L1) by opening and closing the high pressure flow path (32a), A drain valve 35 that controls on/off the movement of the low-pressure compressed air supplied through the low-pressure line L2 by opening and closing the low-pressure flow path 32b, and exhausts the compressed air in the main conduit 31 during the on operation. A low pressure valve (300') is provided, a low pressure sensor (37) is provided on the low pressure line (L2) to measure low pressure compressed air pressure, and is supplied to the low pressure valve (300') through the low pressure line (L2). It comprises a check valve (38) for blocking the back flow of low pressure compressed air and a normally closed valve (39) for controlling the supply of low pressure compressed air through the low pressure line (L2).

And, the low pressure compressed air supplied to the normally closed valve 39 transmits a supply error message when the pressure value is less than or equal to the set limit by the constant pressure sensor.

In Figure 5 (a), the pressure leak test using the pneumatic inspection unit 30 (for example, the first and second brackets (2) (3) pressure leak test of the fastening part), the brake hose (1) first, 2 The injection nozzle 14 and the shut-off valve 24 are fastened to the bracket (2) (3), and after the low-pressure valve (300') is turned off, the high-pressure valve (300) is turned on to operate the high-pressure compressed air (32). ) And after supplying the brake hose 1 through the main conduit 31, the high pressure valve 300 is turned off, and the pressure fluctuation value measured by the high pressure sensor 33 for a set time in the control unit 40 It is provided to determine whether the pressure is leaking. Specifically, 150~170kgf of high pressure compressed air is supplied for 2~5 seconds through the operation of the high pressure valve 300, and the pressure is stabilized for 4~6 seconds by the operation of the high pressure valve 300, and then the high pressure sensor for 12~14 sec ( It detects the pressure displacement of 33) and determines that a leak occurs when the pressure difference between the start and end points of the pressure measurement is 2 kgf or more, and the differential pressure value is provided to be adjustable by the control unit. On the other hand, after completion of the pressure leak test, the connection between the shut-off valve 24 and the two brackets 3 is released to exhaust the pressure inside the brake hose 1 for 2-3 seconds.

In FIG. 5 (b), when inspecting the blockage of the brake hose 1 using the pneumatic inspection unit 30, the injection hose 14 is fastened to the brake hose 1 first bracket 2, and the second After the shut-off valve 24 is released and the high-pressure valve 300 is turned off, the low-pressure compressed air is supplied to the pressure chamber 32 and main by operating the low-pressure valve 300' and the normally closed valve 39 on. When the measured value of the low pressure sensor 37 exceeds the set value while passing through the inside of the brake hose 1 through the pipe 31 and exhausting through the second bracket 3, the control unit 40 is judged to be clogged defective. It is provided. Specifically, when the low pressure valve (300') is operated, 2~4kgf low pressure compressed air is supplied for 2~4sec, and if the low pressure sensor (37) measured value is 1.1kgf or more while the low pressure compressed air is supplied, clogging is defective. Will judge. On the other hand, after the inspection for the clogging defect is completed, the connection of the injection nozzle 14 and the first bracket 2 is released to exhaust the pressure inside the brake hose 1.

Referring to FIG. 1, the injection nozzle 14 is provided with a first docking portion 12 for clamping the first bracket 2 of the brake hose 1 by moving the up and down position on the z-axis guide 11 It is installed on the vertical axis pressure stage (10),

The shut-off valve 24 is a brake hose (1) having various angles and lengths by moving in the x and y-axis directions on the x and y-axis guides (21, 23) under the first docking part (12) The second docking portion 22 for clamping the second bracket (3) is provided in the horizontal pressure check stage 20 is provided.

6 and 7 show the overall configuration of the geomdan device, the brake hose pressure device is applied to the valve and valve system of the present invention is the longitudinal axis pressure stage 10, the horizontal axis pressure stage 20, the injection nozzle ( 14) is connected to the high, low pressure compressed air to supply the brake hose (1), the pressure leak and clogging defects provided to measure the 30, first, second bracket (2) (3) shape, angle , A control arm 40 for setting the position and angle of the first and second docking parts 12 and 22 corresponding to the type of brake hose 1 including the gap, and the robot arm by clamping the brake hose 1 52) It comprises a transfer hand unit 50 provided to load and unload the first and second brackets 2 and 3 to the first and second docking portions 12 and 22 by an operation.

In FIG. 8, the first docking portion 12 includes a first pressure chamber 12a into which the first bracket 2 is fitted and a first bracket 2 accommodated in the first pressure chamber 12a by a pivoting operation. ) Is composed of a first stop piece (12b) for restraining. The first pressure chamber 12a is formed with a'U'-shaped groove in which a small-diameter portion of the first bracket 2 is fitted on one side, and the first bracket 2 accommodated in the'U'-shaped groove is pivoted by a driving unit It is constrained by the first stop piece 12b being operated. Thereafter, the injection nozzle 14 descends by the driving unit and is pressed against the first bracket 2 to supply high pressure and low pressure through the main pipe 31 to inspect the brake hose.

Then, the transverse pressure detection stage 20 is transferred to the x, y-axis direction on the x, y-axis guide 21, 23 by the driving unit according to the angle of the first and second brackets (2) (3), It is provided to close the second bracket (3) of the brake hose (1) forming a straight or inclined angle relative to the first bracket (2) from the bottom.

In FIG. 9, the second docking portion 22 includes a second pressure chamber 22a into which the second bracket 3 is fitted and a second bracket 3 accommodated in the second pressure chamber 22a by a pivoting operation. ) Is composed of a second stop piece (22b) for restraining. The second pressure chamber 22a is formed with an'U'-shaped groove in which a small-diameter portion of the second bracket 3 is fitted on one side, and the second bracket 3 accommodated in the'U'-shaped groove is pivoted by a driving unit It is constrained by the second stop piece 22b being operated. Thereafter, the shut-off valve 24 is transferred by the driving unit to pressurize and close the second bracket.

The shut-off valve 24 is provided in one place to be unidirectionally fastened to the pimel bracket type as shown in FIG. 10(a), or is provided in a pair to be fastened bidirectionally to the eye joint bracket type as shown in FIG. 10(b).

The valve system of the brake hose pressure measuring device of the present invention configured as described above is a first bracket (2) composed of a pimel bracket on one end of the hose (1), and a pimel bracket or an eye joint bracket on the other end. 2 Injecting high and low pressure compressed air into the brake hose formed by fastening of the bracket (3) enables stable and stable inspection of pressure leaks and clogging defects in a short time, especially supplying high pressure compressed air. The ceramic ball is detachably provided at the end of the needle inside the valve to control the /off, and the wear rate is significantly reduced in the process of controlling the compressed air at high pressure. In addition, when the leakage occurs due to wear, the ceramic ball is partially replaced to significantly reduce the maintenance cost. have.

As described above, in the detailed description of the present invention, the most preferred embodiments of the present invention have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the above-described embodiments, but the protection scope should be recognized from the technologies of the claims to be described later and the technical means equivalent to these technologies.

1: brake hose 2: first bracket 3: second bracket
10: longitudinal axis pressure stage 11: z-axis guide
12: 1st docking part 12a: 1st pressure chamber 12b: 1st stop piece
14: injection nozzle
20: Transverse pressure suppression stage
21: x-axis guide 22: second docking part
22a: 2nd pressure chamber 22b: 2nd stop piece 24: Shut-off valve
30: pneumatic inspection unit
31: main pipe 32: pressure chamber 32a, 32b: high, low pressure flow path
33: high pressure sensor 35: drain valve 37: low pressure sensor
38: check valve 39: normally closed valve
40: control unit 50: transfer hand unit 52: robot arm
300, 300': high and low pressure valve
310: driving cylinder 311: through hole 312: elastic body
314: piston 314a: connecting passage 315: space 316: rubber seal
320: valve cylinder 322: supply port 324: discharge port
330: connecting rod 331: supply flow path 340: needle seat section
342: through hole 360: needle 370: finishing member
380: ceramic ball
L1: High pressure line L2: Low pressure line L3: Operating pressure line

Claims (7)

The brake hose (1) of the brake hose pressure measuring device formed by fastening the first bracket (2) consisting of a pimel bracket on one end, and a second bracket (3) consisting of a pimel bracket or an eye joint bracket on the other end In the valve system,
It is fastened to the first bracket, and the injection nozzle 14 for inputting compressed air, the shut-off valve 24 for closing the second bracket, and the injection nozzle 14 are connected to the high and low pressure valve 300. (300') By supplying high and low pressure compressed air by on/off operation, the brake hose (1) pressure leaks and clogging defects are measured by the high and low pressure sensors (33) (38) to the pneumatic inspection unit (30). Composed,
The high and low pressure valves 300 and 300' are
A valve cylinder 320 provided with a supply port 322 and a discharge port 324,
Needle seat portion 340 is provided in the valve cylinder 320 is formed through-hole 342 in the center,
A needle 360 inserted into the valve cylinder 320 and linearly transported by the driving cylinder 310 and provided to open and close the through hole 342 of the needle seat portion 340,
Valve system of a brake hose pressure measuring device, characterized in that it comprises a ceramic ball (380) that is detachably installed in the intaglio groove at the end of the needle (360) and is in direct contact with the through hole (342).
According to claim 1,
The drive cylinder 310 is the inner piston 314 is transferred downward by the elastic body 312, the through hole 342 is always closed by the needle 360, the pneumatic pressure supplied into the drive cylinder 310 The valve system of the brake hose pressure measuring device, characterized in that the piston 314 is transferred upward, and the needle 360 is configured to open the through hole 342 to allow pneumatic movement.
According to claim 1,
The pneumatic inspection unit 30 is connected to the main pipe 31 connected to the injection nozzle 14, the main pipe 31, high and low pressure flow paths 32a and 32b are formed while the high pressure sensor 33 The pressure chamber 32 is installed, and the high-pressure valve (300) for controlling on/off control of high-pressure compressed air movement supplied through the high-pressure line (L1) by opening and closing the high-pressure flow path (32a), and the low-pressure flow path ( A low-pressure valve equipped with a drain valve (35) that controls on/off the movement of the low-pressure compressed air supplied through the low-pressure line (L2) by operating the opening and closing operation of the 32b), and exhausting the compressed air in the main conduit (31) during the on operation. (300'), a low pressure sensor (37) provided in the low pressure line (L2) for measuring low pressure compressed air pressure, and a low pressure compressed air backflow supplied to the low pressure valve (300') through the low pressure line (L2) Valve system of a brake hose pressure measuring device characterized in that it comprises a check valve 38 to shut off, and a normally closed valve (39) for controlling the supply of low pressure compressed air through the low pressure line (L2).
According to claim 3,
When the pressure leak is inspected using the pneumatic inspection unit 30, the injection nozzle 14 and the shutoff valve 24 are fastened to the brake hose 1 first and second brackets 2 and 3, and the low pressure valve 300 ') After the off operation, the high pressure valve 300 is turned on, and the high pressure compressed air is supplied into the brake hose 1 through the pressure chamber 32 and the main pipeline 31, and then the high pressure valve 300 is turned off. , The control unit 40 is provided to determine whether the pressure is leaked by the pressure fluctuation value measured through the high pressure sensor 33 for a set time,
When checking the clogging defect of the brake hose 1 using the pneumatic inspection unit 30, the injection hose 14 is fastened to the brake hose 1 first bracket 2, and the second bracket 3 is a shut-off valve (24) is released, and after the high pressure valve (300) is turned off, the low pressure compressed air is braked through the pressure chamber (32) and the main pipeline (31) by operating the low pressure valve (300') and the normally closed valve (39). Brake, characterized in that provided in the control unit 40 to determine if the low pressure sensor 37 is measured above the set value while passing through the inside of the hose (1) and exhausted through the second bracket (3) The valve system of the hose pressure gauge.
According to claim 3,
A discharge port 324 of the high pressure valve 300 is connected to the high pressure flow passage 32a of the pressure chamber 32, and a supply port of the low pressure valve 300 ′ to the low pressure flow passage 32b of the pressure chamber 32 ( 322) is connected to the valve system of the brake hose pressure gauge.
The driving cylinder 310 is formed with a through hole 311 so that the working pressure is supplied to the center,
The piston 314 is installed to be supported downward by the elastic body 312 inside the driving cylinder 310,
A connecting rod 330 that is sieve coupled through the center of the piston 314,
A valve cylinder 320 provided with a supply port 322 and a discharge port 324,
Needle seat portion 340 is provided in the valve cylinder 320 is formed through-hole 342 in the center,
The needle 360 is inserted into the sieve valve cylinder 320 coupled to the lower portion of the connecting rod 330 to be elevated by the piston 314, and is installed to open and close the through hole 342 of the needle seat portion 340. ,
The ceramic ball 380 which is detachably installed in the intaglio groove at the end of the needle 360 and directly contacts the through hole 342, and
Valve cylinder 320 and the valve for the pressure measuring device, characterized in that it comprises a closing member 370 to be screwed from the bottom to support the needle seat portion 340 below.
The method of claim 6,
A space portion 315 is formed between the inner bottom surface of the driving cylinder 310 and the bottom surface of the piston 314, and the working portion introduced into the through hole 311 is formed at the upper center of the connecting rod 330. A supply passage 331 for supplying to 315 is formed, and a connection passage 314a connecting the supply passage 331 and the space 315 is formed inside the center of the piston 314, so that the driving cylinder is formed. When the operating pressure is supplied to 310, the pressure measuring device characterized in that it is configured to provide pressure to the space 315 through the supply passage 331 of the connection rod 330 and the connection passage 314a formed in the piston. Dragon valve.

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