Pneumatic swivel joint test control box

Abstract

The utility model provides a pneumatic swivel joint test control box which comprises a control box body, a pneumatic control valve island is fixedly arranged in the control box body, and the pneumatic control valve island is supplied with air by an air inlet unit fixed on the control box body. A control panel fixedly arranged on the control box body is used for regulating, controlling and monitoring; the pneumatic control valve terminal comprises a differential pressure sensor, a comparison end and a test end, wherein the comparison end and the test end are communicated with the two ends of the differential pressure sensor respectively, and a protective valve is further connected between the comparison end and the test end. According to the utility model, the pneumatic control valve terminal arranged in the control box body is used for regulating and controlling the inflating, pressure maintaining, detecting and deflating processes of the pneumatic swivel joint, and an operator only needs to communicate a pipeline with the air inlet end of the pneumatic swivel joint and then directly regulates and controls the test process on the control panel; and the leakage amount can be visually observed through the meter body on the leakage meter, so that the operation requirement on operators is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic rotary joint testing equipment, and in particular to a pneumatic rotary joint testing control box. Background Technology

[0002] A pneumatic rotary joint is a device used to connect two components and allow airflow. It is particularly suitable for applications requiring continuous rotation and is widely used in machinery manufacturing, automated production, metallurgical machinery, electrical automation, electronic support services, and metallurgical chemical industries. The pneumatic rotary joint utilizes imported high-speed bearings for internal support, reducing rotational resistance and ensuring rotational speed. The internal structure and seals vary depending on the rotational speed.

[0003] The testing process for pneumatic rotary joints mainly includes flow characteristic test, leakage test, pressure resistance test, repeated assembly test, pull-out test (connection strength test), rated pressure verification test, bending vibration test, pulse vibration test, and visual inspection.

[0004] In existing technologies, the aforementioned testing processes must be performed one by one, meaning only one test can be completed at a time. This results in a lengthy testing process for the pneumatic rotary joint, consuming significant manpower and leading to low testing efficiency. Furthermore, it is impossible to perform multiple testing processes simultaneously and control them accordingly. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes a pneumatic rotary joint test control box to regulate the flow characteristic test, leakage test, pressure resistance test and bending vibration test process of the pneumatic rotary joint.

[0006] To solve the above technical problems, the technical solution adopted by this utility model is: a pneumatic rotary joint test control box, including a control box body, in which a pneumatic control valve island is fixedly installed. The pneumatic control valve island is supplied with air by an air intake unit fixed on the control box body, and is regulated and monitored by a control panel fixed on the control box body.

[0007] The pneumatic control valve island includes a differential pressure sensor and a comparison end and a test end that are respectively connected to both ends of the differential pressure sensor. A protective valve is also connected between the comparison end and the test end to ensure that the pressure in the pneumatic control valve island is within a safe range.

[0008] Furthermore, the pneumatic control valve island includes:

[0009] An integrated valve block, wherein several air passages are provided;

[0010] The gas volume is compared, the test gas is temporarily stored, and the test pressure is output to one end of the differential pressure sensor;

[0011] A differential pressure sensor, the two ends of which are respectively connected to the comparison gas capacity and the output channel opened on the integrated valve block;

[0012] The protective valve is connected to the output terminal of the comparison gas capacity and the output channel, respectively.

[0013] A plurality of valve bodies are fixedly mounted on the integrated valve block and connected to the air passage, so as to regulate the intake of the comparison gas capacity and the opening and closing state of the protection valve.

[0014] Furthermore, the valve body includes a first valve body, a second valve body, and a third valve body, which are fixedly arranged side by side on the integrated valve block. The valve body is a two-position two-way solenoid valve.

[0015] The first valve body is connected to the air intake channel and the comparison gas capacity opened in the integrated valve block;

[0016] The second valve body connects to the air intake channel and the output channel located within the integrated valve block;

[0017] The third valve body connects the air intake channel opened in the integrated valve block and the valve chamber of the protection valve, and is used to regulate the opening and closing of the protection valve.

[0018] Furthermore, the output end of the first valve body is connected to the comparison gas capacitor, and the end of the differential pressure sensor close to the comparison gas capacitor is the comparison end. The combined gasket is connected to the comparison gas capacitor through a combined gasket, and the combined gasket is fixed to the comparison end of the differential pressure sensor with a through-plate screw.

[0019] The differential pressure sensor is connected to the output channel at one end as a test end. The test end is connected to the gas path channel by a clamp, and the clamp is fixed to the test end of the differential pressure sensor by through screws.

[0020] Furthermore, the protective valve includes a valve cavity and a valve core movably disposed within the valve cavity. A first air inlet and a second air inlet are respectively provided at both ends of the valve cavity along its length, for using air pressure to push the valve core to reciprocate within the valve cavity. A third air inlet is provided through the thickness direction of the valve cavity. The third valve body and the comparison gas container are respectively connected to the first air inlet and the second air inlet, and the second valve body is connected to the third air inlet.

[0021] Furthermore, the first valve body, the second valve body, and the third valve body are arranged sequentially on the integrated valve block, the air intake channel is opened based on the width direction of the integrated valve block, and the air intake channel is simultaneously connected to the first valve body, the second valve body, and the third valve body.

[0022] It also includes a fourth valve body, which is sequentially arranged on one side of the third valve body and connects the output channel and the exhaust channel. The exhaust channel is opened based on the length direction of the integrated valve block.

[0023] Furthermore, the intake unit includes a quick-connect straight pipe connector, a filter pressure reducing valve, and a ball valve, which are connected in sequence. One end of the quick-connect straight pipe connector is located inside the control box, and the other end passes through the control box and is connected to the filter pressure reducing valve located outside the control box.

[0024] Furthermore, the control panel consists of buttons, indicator lights, and a gauge body. An electrical mounting plate and a drive system for driving the servo motor are also installed within the control box. The buttons control the opening and closing of the valve body via the electrical mounting plate. The indicator lights are connected to the electrical mounting plate to indicate the working status. The gauge body includes an ammeter, a voltmeter, and a pressure gauge. The ammeter and voltmeter are connected to the electrical mounting plate to indicate the operating status of the drive system, while the pressure gauge is connected to the integrated valve block to indicate the test pressure output.

[0025] Furthermore, several wiring channels are provided in the control box for placing the wiring harness.

[0026] Compared with the prior art, the beneficial effects of this utility model include: the pneumatic control valve island set in the control box regulates the inflation, pressure holding, testing and deflation processes of the pneumatic rotary joint. The operator only needs to connect the pipeline to the air inlet of the pneumatic rotary joint and directly regulate the test process on the control panel. The leakage amount can be directly observed by the gauge on it, which reduces the operation requirements of the operator. In addition, a protective valve is set in the pneumatic control valve island. On the one hand, it can prevent the internal pressure from being too high due to the fault state of the pneumatic control valve island. On the other hand, the leakage amount of the pneumatic rotary joint can be tested within the test pressure range of the pneumatic control valve island by using the protective valve, which greatly reduces the test requirements. Attached Figure Description

[0027] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0028] Figure 1The schematic diagram shows the internal top view of the pneumatic rotary joint test control box;

[0029] Figure 2 The diagram schematically shows the main view structure of the control monitoring panel;

[0030] Figure 3 The schematic diagram shows the main view of the pneumatic rotary joint test control box;

[0031] Figure 4 The schematic diagram shows the top view of the pneumatic control valve island;

[0032] Figure 5 The schematic diagram shows the perspective structure of the air passage inside the integrated valve block;

[0033] Figure 6 The schematic diagram shows the test principle of the pneumatic rotary joint test control box;

[0034] Figure 7 The schematic diagram illustrates the overall distribution structure of the interactive units.

[0035] The diagram is labeled as follows: 1-Control box, 11-First instruction indicator area, 12-Second instruction indicator area, 13-Operation button, 14-Speed ​​controller, 15-Input pressure display screen, 16-Output pressure display screen, 17-Differential pressure detection leakage display screen, 18-Servo driver, 19-Output connector, 2-Pneumatic control valve island, 21-Integrated valve block, 211-Intake channel, 212-Output channel, 213-Exhaust channel, 22-Comparison gas capacity, 23-Differential pressure sensor, 24-Protection valve, 25-First valve body, 26-Second valve body, 27-Third valve body, 28-Fourth valve body, 3-Intake unit, 31-Quick-connect straight pipe connector, 32-Filter pressure reducing valve, 33-Ball valve, 4-Interactive unit, 41-Switching power supply, 42-Low ripple power supply, 43-PLC unit, 44 Touch screen. Detailed Implementation

[0036] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0037] Figure 1 The schematic diagram shows the internal top view of the pneumatic rotary joint test control box. Figure 2 The diagram schematically shows the main view structure of the control and monitoring panel. Figure 3The schematic diagram shows the main view of a pneumatic rotary joint test control box, such as... Figure 1-3 As shown, the device includes a control housing 1, in which a pneumatic control valve island 2 is fixedly installed. The pneumatic control valve island 2 is supplied with air by an air intake unit 3 fixed on the control housing 1, and is adjusted and monitored by a control panel fixed on the control housing 1. The aforementioned pneumatic control valve island 2 includes a differential pressure sensor 23 and a comparison end and a test end connected to both ends of the differential pressure sensor 23, respectively. A protective valve 24 is also connected between the comparison end and the test end to ensure that the pressure in the pneumatic control valve island 2 is within a safe range.

[0038] Figure 4 The schematic diagram shows a top view of the pneumatic control valve island. Figure 5 The schematic diagram shows a perspective view of the air passageway inside the integrated valve block. Figure 6 The schematic diagram illustrates the test principle of the pneumatic rotary joint test control box. The following is in conjunction with... Figure 4-6 The pneumatic control valve island 2 is described below. The pneumatic control valve island 2 includes an integrated valve block 21, a comparison gas container 22, a differential pressure sensor 23, a protection valve 24, and several valve bodies. Several air passages are provided within the integrated valve block 21. The comparison gas container 22, differential pressure sensor 23, protection valve 24, and several valve bodies are all fixedly mounted on the integrated valve block 21. The two ends of the differential pressure sensor 23 are respectively connected to the comparison gas container 22 and the output channel 212 located on the integrated valve block 21. The comparison gas container 22 is used to temporarily store the test pressure and output the test pressure to one end of the differential pressure sensor 23. Several valve bodies are fixedly mounted on the integrated valve block 21 and connected to the air passages, allowing the valve bodies to regulate the air intake of the comparison gas container 22 and the opening / closing state of the protection valve 24. The protective valve 24 is a plate-type pneumatic control valve. The plate-type pneumatic control valve is normally open and can balance the test pressure at both ends of the differential pressure sensor 23. When it is necessary to perform a pressure holding test on the pneumatic rotary joint under test, the plate-type pneumatic control valve can be closed, so that the test end of the differential pressure sensor 23 is disconnected from the comparison end. At this time, if the pneumatic rotary joint under test leaks, the pressure at the test end will be significantly less than the pressure at the comparison end, and the pressure holding test can be completed. If no leak occurs, the test pressure at the test end and the comparison end will remain consistent.

[0039] like Figure 4As shown, the aforementioned valve body includes a first valve body 25, a second valve body 26, and a third valve body 27. The first valve body 25, the second valve body 26, and the third valve body 27 are fixedly arranged side by side on the integrated valve block 21. The aforementioned first valve body 25, the second valve body 26, and the third valve body 27 are all two-position two-way solenoid valves. The first valve body 25 is connected to the air intake channel 211 and the comparison gas capacity 22 opened in the integrated valve block 21. The second valve body 26 is connected to the air intake channel 211 and the output channel 212 opened in the integrated valve block 21. The third valve body 27 is connected to the air intake channel 211 opened in the integrated valve block 21 and the valve chamber of the plate-type pneumatic control valve, and is used to regulate the opening and closing of the plate-type pneumatic control valve. The aforementioned first valve body 25, second valve body 26, and third valve body 27 are arranged sequentially on the integrated valve block 21. The air intake channel 211 is based on the width direction of the integrated valve block 21 and is simultaneously connected to the first valve body 25, second valve body 26, and third valve body 27. That is, the air intake channel 211 can simultaneously supply test pressure to the first valve body 25, second valve body 26, and third valve body 27, and then determine their destination according to their respective opening and closing, thereby completing the relevant delivery or control process.

[0040] It is worth noting that a fourth valve body 28 is also included. The fourth valve body 28 is arranged sequentially on one side of the third valve body 27 and is used to connect the output channel 212 and the exhaust channel 213. The aforementioned output channel 212 and exhaust channel 213 are both opened based on the length direction of the integrated valve block 21.

[0041] The output end of the first valve body 25 is connected to the comparison gas container 22. The end of the differential pressure sensor 23 closest to the comparison gas container 22 is the comparison end, which receives the comparison test pressure from the comparison gas container 22. The comparison gas container 22 and the differential pressure sensor 23 are connected by a combination gasket, which is fixed to the comparison end of the differential pressure sensor 23 with through-plate screws. The end of the differential pressure sensor 23 connected to the output channel 212 is the test end. The test end is connected to the gas path channel by a clamp, which is fixed to the test end of the differential pressure sensor 23 with through-plate screws.

[0042] The following combination Figure 4The plate-type pneumatic control valve is described in detail below. The plate-type pneumatic control valve includes a valve core movably disposed within a valve cavity. A first air inlet and a second air inlet are respectively opened at both ends along the length of the valve cavity. The position of the valve core within the valve cavity is adjusted by inputting test pressure into the first and second air inlets. The first air inlet is connected to the third valve body 27 for regulating its on / off state, while the second air inlet is connected to the comparison gas capacity 22 through an air passage opened in the integrated valve block 21. Air is supplied to the second air inlet of the plate-type pneumatic control valve through the air passage, thus maintaining its normally open state. A third air inlet is opened along the thickness direction of the valve cavity. The output end of the second valve body 26 is connected to the third air inlet, supplying test pressure to the inside of the valve cavity through the third air inlet. In practical use, when the plate-type pneumatic control valve is in the normally open state, the valve core in the valve cavity is positioned close to the first air inlet. At this time, the third valve body 27 is in the closed state. After the test pressure is sent in through the comparison gas container 22 via the second air inlet, because the third air inlet is close to the second air inlet, the test pressure is sent from the comparison gas container 22 into the valve cavity through the second air inlet, and then flows to the test end of the differential pressure sensor 23 through the third air inlet, so that the pressure at the comparison end and the test end of the differential pressure sensor 23 are completely consistent. When the plate-type pneumatic control valve is in the closed state, the valve core in the valve cavity is positioned close to the second air inlet. At this time, the third valve body 27 is in the open state, and the valve core blocks the second and third air inlets, so that the comparison end and the test end of the differential pressure sensor 23 are isolated. At this time, the detection of the leakage of the test piece can be completed.

[0043] The following combination Figure 1-3 The intake unit 3 is described in detail below. The intake unit 3 is fixedly installed on the side of the control box 1 and includes a quick-connect straight pipe connector 31, a filter pressure reducing valve 32, and a ball valve 33. The quick-connect straight pipe connector 31 passes through the thickness direction of the control box 1 and is connected to the filter pressure reducing valve 32 located outside the control box 1. The other end of the filter pressure reducing valve 32 is connected to a ball valve 33. The ball valve 33 controls the opening and closing of the intake unit 3, and the filter pressure reducing valve 32 controls the pressure of the input test gas. Then, the test gas is introduced through the pipe connected to the inlet of the intake channel 211 and the quick-connect straight pipe connector 31.

[0044] like Figure 2As shown, the control and monitoring panel is equipped with several operation buttons 13 and corresponding first instruction indicator areas 11 and second instruction indicator areas 12 (both the aforementioned first instruction indicator areas 11 and second instruction indicator areas 12 are indicator lights), used to indicate the control status of some operation buttons 13. The aforementioned operation buttons 13 include an emergency stop button, a power button, a manual / automatic adjustment knob, a forward / reverse adjustment knob, a start button, an inflation button, a pressure holding button, a detection button, and a deflation button. The first instruction indicator area 11 includes a power indicator light, a start indicator light, a forward indicator light, and a reverse indicator light. For example, after pressing the power button, the power indicator light in the first instruction indicator area 11 illuminates. When the manual / automatic adjustment knob is set to automatic, pressing the start button illuminates the start indicator light, and the relevant function detection is completed by the PLC unit 43. When the manual / automatic adjustment knob is set to manual, the relevant function detection is completed manually by the forward / reverse adjustment knob, the inflation button, the pressure holding button, the test button, and the deflation button. Regardless of whether the detection is in manual or automatic mode, in case of an accident (including a dangerous situation), pressing the emergency stop button should immediately stop the pneumatic rotary joint under test and deflate it. The forward and reverse indicator lights are used to indicate the control status of the forward / reverse adjustment knob. It is worth noting that the aforementioned manual / automatic adjustment knob, forward / reverse adjustment knob, and start button are all used to control the action of the servo motor. A drive unit (including a speed controller 14 and a servo driver 18) is also provided on the control monitoring panel. Based on the aforementioned knobs or buttons, in conjunction with the speed controller 14, the servo controller controls the direction and speed of the servo motor. The second instruction indicator area 12 includes an inflation indicator, a pressure holding indicator, a detection indicator, and a deflation indicator. When the inflation button, pressure holding button, detection button, and deflation button are pressed respectively, the aforementioned inflation indicator, pressure holding indicator, detection indicator, and deflation indicator will light up accordingly to indicate the current air circuit test process for the pneumatic rotary joint. A monitoring module (including an input pressure display screen 15, an output pressure display screen 16, and a differential pressure detection leakage display screen 17) is also provided on the control monitoring panel. During the air circuit test of the pneumatic rotary joint, the test pressure of the input pneumatic control valve island and the test pressure of the output pneumatic control valve island are displayed, and the reading of the differential pressure sensor in the pneumatic control valve island is displayed in real time. The output connector 19, which outputs the test pressure to the pneumatic control valve island, is also fixedly installed on the control monitoring panel.

[0045] Figure 7 The schematic diagram illustrates the overall distribution structure of the interactive units, such as Figure 7As shown, an interactive unit 4 (i.e., an electrical mounting plate) is also provided in the control box 1. The electrical mounting plate includes a switching power supply 41, a low-ripple power supply 42, a PLC unit 43, a touch screen 44, and several wiring channels. The aforementioned switching power supply 41 supplies power to the control box and assists in the control process of the pneumatic control valve island. A power interface and an encoder are provided on the servo motor. The aforementioned low-ripple power supply 42 supplies power to the differential pressure sensor 22. The speed controller 14 and related buttons or knobs on the control monitoring panel have their signal output terminals connected to the PLC unit 43. The PLC unit 43, in conjunction with the servo driver 18, precisely controls the speed and direction of the servo motor using the encoder mounted on the servo motor. Due to the encoder, the number of rotations of the servo motor can be precisely controlled. The aforementioned PLC unit 43 is also used in the pneumatic circuit testing process of the pneumatic rotary joint. The first, second, third, and fourth solenoid valves located in the pneumatic control valve island are all controlled by the PLC unit 43 to maintain their opening and closing states. When the corresponding button, such as the inflation button, is pressed on the control and monitoring panel, the PLC unit 43 can regulate the opening and closing state of the relevant solenoid valve to assist in completing the inflation process. The wiring troughs set on the electrical mounting plate help to ensure the clear structure of the internal structure of the control box, and can avoid interference from the complicated internal wiring harness during the wiring process, pipe connection process and subsequent maintenance.

[0046] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A pneumatic rotary joint test control box, characterized in that, Includes a control box (1), in which a pneumatic control valve island (2) is fixedly installed. The pneumatic control valve island (2) is supplied with air by an air intake unit (3) fixed on the control box (1), and is regulated and monitored by a control panel fixed on the control box (1). The pneumatic control valve island (2) includes a differential pressure sensor (23) and a comparison end and a test end connected to both ends of the differential pressure sensor (23). A protection valve (24) is also connected between the comparison end and the test end to ensure that the pressure in the pneumatic control valve island (2) is within a safe range.

2. The pneumatic rotary joint test control box according to claim 1, characterized in that, The pneumatic control valve island (2) includes: An integrated valve block (21) has several air passages provided therein; The gas capacity (22) is compared, the test gas is temporarily stored and the test pressure is output to one end of the differential pressure sensor (23); Differential pressure sensor (23), the two ends of which are connected to the comparison gas container (22) and the output channel (212) opened on the integrated valve block (21), respectively; The protective valve (24) is connected to the output end of the comparison gas capacity (22) and the output channel (212), respectively; A number of valve bodies are fixedly mounted on the integrated valve block (21) and connected to the air passage, so as to regulate the air intake of the comparison gas capacity (22) and the opening and closing state of the protection valve (24).

3. The pneumatic rotary joint test control box according to claim 2, characterized in that, The valve body includes a first valve body (25), a second valve body (26) and a third valve body (27). The first valve body (25), the second valve body (26) and the third valve body (27) are fixedly arranged side by side on the integrated valve block (21). The valve body is a two-position two-way solenoid valve. The first valve body (25) is connected to the air intake channel (211) and the comparison gas capacity (22) opened in the integrated valve block (21); The second valve body (26) is connected to the air intake channel (211) and the output channel (212) opened in the integrated valve block (21); The third valve body (27) connects the air intake channel (211) opened in the integrated valve block (21) and the valve chamber of the protection valve (24), and is used to regulate the opening and closing of the protection valve (24).

4. The pneumatic rotary joint test control box according to claim 3, characterized in that, The output end of the first valve body (25) is connected to the comparison gas container (22). The differential pressure sensor (23) is close to one end of the comparison gas container (22) as the comparison end. It is connected to the comparison gas container (22) by a combination pad. The combination pad is fixed to the comparison end of the differential pressure sensor (23) by a through-plate screw. The differential pressure sensor (23) is connected to the output channel (212) at one end as a test end. The test end is connected to the gas path channel by a clamp, and the clamp is fixed to the test end of the differential pressure sensor (23) by through screws.

5. The pneumatic rotary joint test control box according to claim 4, characterized in that, The protective valve (24) includes a valve cavity and a valve core movably disposed in the valve cavity. A first air inlet and a second air inlet are respectively provided at both ends of the valve cavity along its length direction, for using air pressure to push the valve core to reciprocate in the valve cavity. A third air inlet is provided through the thickness direction of the valve cavity. The third valve body (27) and the comparison gas container (22) are respectively connected to the first air inlet and the second air inlet. The second valve body (26) is connected to the third air inlet.

6. The pneumatic rotary joint test control box according to claim 3, characterized in that, The first valve body (25), the second valve body (26) and the third valve body (27) are arranged sequentially on the integrated valve block (21). The air intake channel (211) is opened based on the width direction of the integrated valve block (21), and the air intake channel (211) is simultaneously connected to the first valve body (25), the second valve body (26) and the third valve body (27). It also includes a fourth valve body (28), which is arranged sequentially on one side of the third valve body (27) and connects the output channel (212) and the exhaust channel (213). The exhaust channel (213) is opened based on the length direction of the integrated valve block (21).

7. The pneumatic rotary joint test control box according to claim 1, characterized in that, The intake unit (3) includes a quick-connect straight pipe connector (31), a filter pressure reducing valve (32), and a ball valve (33). The quick-connect straight pipe connector (31), the filter pressure reducing valve (32), and the ball valve (33) are connected in sequence. One end of the quick-connect straight pipe connector (31) is located inside the control box (1), and the other end passes through the control box (1) and is connected to the filter pressure reducing valve (32) located outside the control box (1).

8. The pneumatic rotary joint test control box according to claim 2, characterized in that, The control panel consists of buttons, indicator lights, and gauges. An electrical mounting plate and a drive system for driving the servo motor are also provided in the control box (1). The buttons control the opening and closing of the valve body through the electrical mounting plate. The indicator lights are connected to the electrical mounting plate to indicate the working status. The gauges include an ammeter, a voltmeter, and a pressure gauge. The ammeter and voltmeter are connected to the electrical mounting plate to indicate the operating status of the drive system. The pressure gauge is connected to the integrated valve block (21) to indicate the test pressure output.

9. The pneumatic rotary joint test control box according to claim 1, characterized in that, Several wiring channels are also provided in the control box (1) for placing the wiring harness.

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