Pneumatic swivel joint test control box

Abstract

The utility model provides a pneumatic swivel joint test control box comprising a control box body, a pneumatic control valve island is fixedly arranged in the control box body, the pneumatic control valve island comprises a differential pressure sensor, and two ends of the differential pressure sensor are respectively communicated with an air inlet channel and an output channel. The gas inlet channel is supplied with gas by a gas inlet unit fixedly arranged on the control box body, and the output channel is used for providing test gas for the pneumatic swivel joint; the air inlet unit is communicated with the air inlet channel and the output channel, and a first control valve body and a second control valve body which are used for adjusting and controlling connection and disconnection are arranged on the air inlet channel and the output channel respectively. 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 a protective valve is arranged in the pneumatic control valve terminal, so that the condition of overlarge internal pressure caused by a fault state in the pneumatic control valve terminal can be prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pneumatic rotary joint test, especially relates to a pneumatic rotary joint test control box. BACKGROUND

[0002] Pneumatic rotary joint is a kind of equipment for connecting two components and realizing air flow, especially suitable for the scene needing continuous rotation operation, and it is widely used in mechanical manufacturing, automation production, metallurgical machinery, electrical automation, electronic supporting service, metallurgical chemical industry and other fields.Pneumatic rotary joint adopts imported high-speed bearing support inside, reduces rotation resistance and guarantees rotation speed.According to the different rotation speed, the internal structure and sealing element are also different.

[0003] The detection process of pneumatic rotary joint mainly includes flow characteristic test, leakage test, pressure test, repeated assembly test, pulling separation test (connection strength test), rated pressure verification test, bending vibration test, pulse vibration test and appearance inspection.

[0004] In the prior art, the flow characteristic test, leakage test, pressure test and rated pressure verification test of the above-mentioned need to be carried out one by one, that is, only one test can be completed at the same time, so that it takes more time to complete the test process of pneumatic rotary joint, consumes more test manpower and has low test efficiency.It is impossible to carry out multiple test processes at the same time and complete the corresponding regulation and control. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art, and the utility model provides a pneumatic rotary joint test control box for regulating and controlling the flow characteristic test, leakage test, pressure test and rated pressure verification test process of pneumatic rotary joint.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of a pneumatic rotary joint test control box, characterized by comprising a control box body, a pneumatic control valve island is fixedly arranged in the control box body, the pneumatic control valve island comprises a differential pressure sensor, two ends of the differential pressure sensor are communicated with an air inlet channel and an output channel respectively, the air inlet channel is supplied with air by an air inlet unit fixedly arranged on the control box body, and the output channel is used for providing test gas for pneumatic rotary joint.

[0007] The air inlet unit is communicated with the air inlet channel and the output channel respectively, and a first control valve body and a second control valve body for regulating and controlling on-off are arranged on the air inlet channel and the output channel respectively.

[0008] Further, a protection valve is arranged on the pneumatic control valve island, and two ends of the protection valve are connected with two ends of the differential pressure sensor respectively.

[0009] Further, the protection valve is controlled by a third control valve body, an input end of the third control valve body is communicated with an output end of the air inlet unit, and an output end of the third control valve body is communicated with the protection valve.

[0010] Further, a comparison air container is arranged between the output end of the first control valve body and the differential pressure sensor, and is used for temporarily storing test pressure and outputting the test pressure to one end of the differential pressure sensor.

[0011] Further, the first control valve body, the second control valve body and the third control valve body are communicated with the air inlet channel.

[0012] Further, an air outlet channel is arranged, the air outlet channel is communicated with the output channel, and a fourth control valve body for controlling opening and closing of the air outlet channel is arranged on the air outlet channel.

[0013] Further, a pressure gauge is arranged on the output end of the air inlet unit, and is used for monitoring pressure of test gas entering the pneumatic control valve island.

[0014] Further, the air inlet unit comprises a quick plug straight-through pipe joint, a filter pressure reducing valve and a ball valve, the quick plug straight-through pipe joint, the filter pressure reducing valve and the ball valve are communicated in sequence, one end of the quick plug straight-through pipe joint is located in the control box body, and the other end penetrates through the control box body and is communicated with the filter pressure reducing valve located outside the control box body.

[0015] Compared with the prior art, the beneficial effects of the utility model include: the pneumatic control valve island arranged in the control box body is used for controlling inflation, pressure maintaining, detection and deflation processes of the pneumatic rotary joint, an operator only needs to connect a pipeline with an air inlet end of the pneumatic rotary joint, directly controls a test process on a control panel, and can directly and visually observe a leakage amount through a table body, and the operation requirement of the operator is reduced; in addition, the protection valve is arranged in the pneumatic control valve island, on one hand, the protection valve can prevent the case that internal pressure is too large caused by a fault state in the pneumatic control valve island, and on the other hand, the protection valve can be used to test the leakage amount of the pneumatic rotary joint in a test pressure range of the pneumatic rotary joint, and the test requirement is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The disclosure of the utility model will be described with reference to the drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the protection scope of the utility model. In the drawings, the same reference signs are used to refer to the same parts. Among them:

[0017] Figure 1 The principle diagram of the pneumatic rotary joint test control box is schematically shown.

[0018] In the figure, 1 is a differential pressure sensor, 2 is an air inlet unit, 21 is a filter pressure reducing valve, 22 is a ball valve, 3 is a first control valve body, 4 is a second control valve body, 5 is a third control valve body, 6 is a fourth control valve body, 7 is a protection valve, 8 is a comparison gas container, and 9 is a pressure gauge. DETAILED DESCRIPTION

[0019] It is easy to understand that, according to the technical scheme of the utility model, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the utility model. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical scheme of the utility model, and should not be regarded as the whole of the utility model or as a limitation or restriction on the technical scheme of the utility model.

[0020] The pneumatic rotary joint test control box comprises a control box body, a pneumatic control valve island is fixedly arranged in the control box body, the pneumatic control valve island comprises a differential pressure sensor 1, two ends of the differential pressure sensor 1 are respectively communicated with an air inlet channel and an output channel, the air inlet channel is supplied with air by an air inlet unit 2 fixedly arranged on the control box body, and the output channel is used for providing test gas for the pneumatic rotary joint; the air inlet unit 2 is communicated with the air inlet channel and the output channel, and a first control valve body 3 and a second control valve body 4 for regulating on-off are arranged on the air inlet channel and the output channel respectively. The leakage condition and the specific leakage amount of the pneumatic rotary joint are detected by the differential pressure sensor 1, and the air inlet process and the air outlet process are regulated by the first control valve body 3 and the second control valve body 4, so that the adjustment of the pneumatic rotary joint test process is ensured.

[0021] A protection valve 7 is further arranged on the pneumatic control valve island, and two ends of the protection valve 7 are respectively connected with two ends of the differential pressure sensor 1. The protection valve 7 is in a normally open state, the on-off of the protection valve 7 is regulated by a third control valve body 5 in a pneumatic adjustment mode, an input end of the third control valve body 5 is communicated with an output end of the air inlet unit 2, an output end of the third control valve body 5 is communicated with the protection valve 7, when the third control valve body 5 is opened, the protection valve 7 is disconnected in a pneumatic adjustment mode, and two ends of the differential pressure sensor 1 are in a disconnected state, at this time, the leakage condition of the pneumatic rotary joint can be directly reflected.

[0022] For more convenient to complete the differential pressure sensor 1 both ends of the contrast, also provided with the comparison gas capacity 8, comparison gas capacity 8 is connected between the output end of the first control valve body 3 and the differential pressure sensor 1, for temporary storage test pressure refrigerator differential pressure sensor 1 one end output test pressure, by setting up comparison gas capacity 8, without the need to open the first control valve body 3 to the differential pressure sensor 1 one end output test pressure, only need to open the first control valve body 3 to fill in the comparison gas capacity 8 enough test gas after closing, subsequent by comparison gas capacity 8 differential pressure sensor 1 output test pressure for comparison with the test pressure size output to the pneumatic rotary joint in, can directly see the leakage of pneumatic rotary joint, and by comparison gas capacity 8 can effectively prevent the continuous output test pressure to the differential pressure sensor 1 caused by the end of the test pressure too big situation, ensure the safety of the test process.

[0023] It is worth mentioning that the first control valve body 3, the second control valve body 4 and the third control valve body 5 are communicated with the inlet channel, and the test pressure is provided for the first control valve body 3, the second control valve body 4 and the third control valve body 5 through the unified inlet channel for output to the pneumatic rotary joint or for controlling the on-off of the protection valve 7 or for charging the comparison gas capacity 8, without setting up a separate gas path to complete the foregoing process.

[0024] In order to ensure the exhaust process after the test is completed, an exhaust channel is also provided, which is communicated with the output channel, and a fourth control valve body 6 is arranged on the exhaust channel for controlling the on-off of the exhaust channel, so as to control the exhaust process.

[0025] It is worth mentioning that in order to accurately measure the test pressure, a pressure gauge 9 is arranged at the output end of the inlet unit 2 for monitoring the pressure of the test gas entering the pneumatic control valve island; the inlet unit 2 comprises a quick plug straight pipe joint, a filter pressure reducing valve 21 and a ball valve 22, the ball valve 22 is used to control the inlet process, and after the gas inlet through the ball valve 22, the filter pressure reducing valve 21 is used to adjust the test pressure to the required test pressure, and then the quick plug straight pipe joint is connected with the pneumatic control valve island through the pipe body.

[0026] The control box can be provided with control buttons for controlling the first control valve body 3, the second control valve body 4, the third control valve body 5 and the fourth control valve body 6, and the readings of the pressure gauge 9 and the differential pressure sensor 1 are displayed on the control box to display the test pressure and the leakage amount.

[0027] The pneumatic control valve island arranged in the control box controls the inflation, pressure maintaining, detection and deflation process of the pneumatic swivel joint, so that the operator only needs to communicate the pipeline with the air inlet end of the pneumatic swivel joint, directly controls the test process on the control panel, and can directly and intuitively observe the leakage amount on the table body, so that the operation requirement of the operator is reduced; in addition, the protection valve 7 is arranged in the pneumatic control valve island, which can prevent the case of excessive internal pressure caused by the fault state in the pneumatic control valve island, and on the other hand, the protection valve 7 can be used to test the leakage amount of the pneumatic swivel joint in the test pressure range, which greatly reduces the test requirement.

[0028] The technical scope of the utility model is not limited to the content in the above description, and those skilled in the art can make various modifications and changes to the above embodiment without departing from the technical thought of the utility model, and these modifications and changes should all belong to the protection scope of the utility model.

Claims

1. A pneumatic rotary joint test control box, characterized in that, The system includes a control housing, in which a pneumatic control valve island is fixedly installed. The pneumatic control valve island includes a differential pressure sensor (1). The two ends of the differential pressure sensor (1) are respectively connected to an air intake channel and an output channel. The air intake channel is supplied with air by an air intake unit (2) fixedly installed on the control housing. The output channel is used to provide test gas to the pneumatic rotary joint. The intake unit (2) is connected to the intake channel and the output channel respectively, and a first control valve body (3) and a second control valve body (4) for regulating the on and off are respectively provided on the intake channel and the output channel.

2. The pneumatic rotary joint test control box according to claim 1, characterized in that, A protective valve (7) is also included on the pneumatic control valve island, and the two ends of the protective valve (7) are respectively connected to the two ends of the differential pressure sensor (1).

3. The pneumatic rotary joint test control box according to claim 2, characterized in that, The protection valve (7) is controlled by a third control valve body (5). The input end of the third control valve body (5) is connected to the output end of the air intake unit (2), and the output end of the third control valve body (5) is connected to the protection valve (7).

4. The pneumatic rotary joint test control box according to claim 3, characterized in that, It also includes a comparison gas container (8), which is connected between the output end of the first control valve body (3) and the differential pressure sensor (1) for temporarily storing the test pressure and outputting the test pressure to one end of the differential pressure sensor (1).

5. The pneumatic rotary joint test control box according to claim 4, characterized in that, The first control valve body (3), the second control valve body (4), and the third control valve body (5) are all connected to the air intake channel.

6. The pneumatic rotary joint test control box according to claim 1, characterized in that, It also includes an exhaust passage that is connected to the output passage, and a fourth control valve body (6) for regulating the opening and closing of the exhaust passage is provided above the exhaust passage.

7. The pneumatic rotary joint test control box according to claim 1, characterized in that, A pressure gauge (9) is also provided at the output end of the air intake unit (2) to monitor the pressure of the test gas entering the pneumatic control valve island.

8. The pneumatic rotary joint test control box according to claim 7, characterized in that, The intake unit (2) includes a quick-connect straight pipe connector, a filter pressure reducing valve (21) and a ball valve (22). The quick-connect straight pipe connector, the filter pressure reducing valve (21) and the ball valve (22) 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 (21) located outside the control box.

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