CN218444366U

CN218444366U - Fluid pipe gas tightness detecting system

Info

Publication number: CN218444366U
Application number: CN202222708925.4U
Authority: CN
Inventors: 杨磊; 兰杰; 王知银; 左秀
Original assignee: Chongqing Institute Of Optical Machinery Co ltd; Chongqing Laser Rapid Prototyping & Tooling Manufacture Productivity Center Co ltd
Current assignee: Chongqing Institute Of Optical Machinery Co ltd; Chongqing Laser Rapid Prototyping & Tooling Manufacture Productivity Center Co ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-02-03
Anticipated expiration: 2032-10-14

Abstract

The utility model relates to the technical field of air tightness detection, in particular to a fluid pipe air tightness detection system; the device comprises a controller, an air tightness detector, a fixture tool, an air source mechanism, a main air path and a plurality of sub air paths which are respectively communicated with the main air path; the main air path is provided with a main electromagnetic valve, and the sub air paths are respectively provided with sub electromagnetic valves; the clamp tool comprises a plurality of pneumatic clamps, a plurality of sealing joints and an air tightness detection joint; the air source mechanism is communicated with the main air path; the sub-gas circuits are respectively connected with the airtight detection joints; the device also comprises a waste box, and an induction device is arranged at the opening of the waste box; the controller is respectively and electrically connected with the air tightness detector, the air source mechanism, the pneumatic clamp, the main electromagnetic valve, the sub electromagnetic valves and the sensing device; diversified mistake proofing sets up, can be timely distinguish the classification to detecting the work piece, avoid personnel to neglect the condition that leads to the defective work to flow into in the certified products to take place.

Description

Fluid pipe gas tightness detecting system

Technical Field

The utility model relates to an air tightness detects technical field, specifically is a fluid pipe air tightness detecting system.

Background

The fluid pipeline airtightness detection is mainly used for factory detection of the following parts: automobile hoses: the air tightness leak detector is an instrument for detecting a fluid pipeline. When the air tightness of the fluid pipeline is detected, gas with set pressure is filled into the pipeline to be detected or the pipeline to be detected is pumped into negative pressure, then pressure maintaining is carried out, if the allowable leakage pressure of the pipeline to be detected occurs in pressure maintaining time, the workpiece is judged to be qualified after the pressure maintaining time is over, and otherwise, the workpiece is not qualified.

When the prior art detects the fluid pipe gas tightness by adopting the gas tightness detector, the gas tightness detector can singly detect the gas pipe gas tightness, the single detection operation is convenient, and the staff can easily distinguish, classify and place the gas pipe gas tightness after detaching the gas pipe gas tightness detector from the detection platform. But the detection efficiency is relatively low. In order to improve the detection efficiency, a plurality of fluid pipes can be simultaneously detected, but the detection process needs to manually disassemble and assemble the fluid pipes on the clamp after all, the detection quantity is increased, the disassembling and assembling times are increased, carelessness can be caused, namely, if the detection workpieces (qualified workpieces and unqualified workpieces) cannot be timely distinguished and classified, unqualified products are easy to flow into qualified products.

Therefore, how to help the staff to distinguish and classify the detection workpieces in time in the detection process and avoid the problem that the unqualified products flow into the qualified products due to negligence of the staff.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that in the prior art, in the process of detecting a plurality of fluid pipes, due to the fact that personnel negligence causes that unqualified products flow into qualified products due to the fact that detection workpieces cannot be classified in time, the following technical scheme is provided:

a fluid pipe air tightness detection system comprises a controller, an air tightness detector, a clamp tool, an air source mechanism, a main air path and a plurality of sub air paths which are respectively communicated with the main air path; the main air path is provided with a main electromagnetic valve, and the sub air paths are respectively provided with a sub electromagnetic valve; the air tightness detector is communicated with the main air path; the clamp tool comprises a plurality of pneumatic clamps for clamping or loosening the fluid pipe, a plurality of sealing joints for sealing one end of the fluid pipe and an airtight detection joint for communicating the other end of the fluid pipe; the air source mechanism is communicated with the main air path; the sub-gas circuits are respectively connected with the airtight detection joints; the device also comprises a waste box, wherein an opening of the waste box is provided with a sensing device; the controller is respectively and electrically connected with the air tightness detector, the air source mechanism, the pneumatic clamp, the main electromagnetic valve, the sub electromagnetic valves and the sensing device.

Preferably, the air source mechanism comprises a positive pressure or negative pressure air source, an air source electromagnetic valve, a normal pressure relief valve and a pneumatic triple piece; the air inlet end of the pneumatic triple piece is communicated with an air source, the air outlet end of the pneumatic triple piece is communicated with the main air path through a normal pressure relief valve, and the normal pressure relief valve and the air source electromagnetic valve are respectively and electrically connected with the controller.

Preferably, the system further comprises a fingerprint identification module, and the fingerprint identification module is electrically connected with the controller.

Preferably, the pneumatic triple piece comprises an air filter, a pressure reducing valve and an oil atomizer.

Preferably, the device further comprises a double-hand starting switch, and the double-hand starting switch is electrically connected with the controller.

Preferably, the controller also comprises sound and light alarm devices matched with the sub electromagnetic valves in number, and the sound and light alarm devices are electrically connected with the controller.

Preferably, the sensing device is a grating or an infrared sensor.

The utility model discloses an use and theory of operation lie in:

and respectively placing a plurality of pipes to be detected on a fixture tool, wherein the fixture tool is provided with a sealing joint and an air tightness detection joint which are matched with the pipes to be detected. And connecting one end of the pipe to be tested with the sealing joint, sealing the end, connecting the other end of the pipe to be tested with the airtight detection joint, and then clamping and fixing each pipe to be tested by using the pneumatic clamp.

After the system is started, positive pressure or negative pressure (detection negative pressure pipe) is selected to be started according to the type of the pipes to be detected in the same batch, and the air tightness detector enters a corresponding mode. The controller controls the main electromagnetic valve and each sub electromagnetic valve to open the passage, the normal pressure relief valve is closed, the air source mechanism is started, the main air path and each sub air path are inflated or exhausted, the pipes to be tested are simultaneously pressurized or exhausted to form negative pressure, then pressure maintaining is carried out, and the air tightness detector starts to test. If the allowable leakage pressure of the pipe to be tested occurs in the pressure maintaining time, judging that all the pipes to be tested in the batch are qualified after the pressure maintaining time is over; and the controller controls the pneumatic clamp to unlock all the pipes to be tested. If exceed the leakage pressure that allows, the controller closes other sub-gas circuits through the mode of controlling master solenoid valve and corresponding sub-solenoid valve, only remains a sub-gas circuit and main gas circuit intercommunication, then tests each pipe that awaits measuring in proper order, and after the detection finishes, controller control airtight detector, air supply mechanism stop work, and the ordinary pressure relief valve is opened, makes the atmospheric pressure in main gas circuit and each sub-gas circuit resume to the ordinary pressure state. The controller controls the pneumatic clamp to unlock the fluid pipe on the sub-air passage which does not exceed the allowable leakage pressure according to the detection result of the air tightness detector, so that the qualified product can be conveniently taken down and placed by a worker; and unqualified fluid pipe then still is pressed from both sides tightly by pneumatic fixture, at this moment, only can this anchor clamps locking be relieved through manual operation to the staff still need put into the waste bin with unqualified pipe this moment, induction system in the waste bin senses unqualified pipe and has gone into the cabin, with signal feedback to controller, the controller can only control system and reset, prepares to carry out next product test.

The beneficial effects of the utility model reside in that:

1. through controller control anchor clamps locking defective products, need the staff to relieve locking state manually simultaneously to still need to put into the defective products behind the dump bin, just can carry out next product detection, diversified mistake proofing sets up, can help the staff timely distinguish the classification to detecting the work piece, avoids personnel's carelessness to lead to the defective products to flow into the condition emergence in the defective products.

2. The air tightness is detected simultaneously on the fluid pipes, and if the pressure leakage exceeds a specified value, the fluid pipes are detected one by one, so that the detection efficiency is greatly improved.

Drawings

FIG. 1 is a schematic diagram of an exemplary embodiment of a detection system of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

fig. 3 is a schematic structural view of the middle clamp tool of the present invention;

fig. 4 is a schematic connection diagram of the system of the present invention;

FIG. 5 is a schematic diagram of signal input and output of the main controller of the present invention;

FIG. 6 is a schematic diagram of the overall system of the present invention;

fig. 7 is a power supply diagram of the main circuit of the middle system of the present invention.

In the figure: 1. a controller; 2. an air tightness detector; 3. a pneumatic clamp; 4. sealing the joint; 5. an air-tight detection joint; 6. a master electromagnetic valve; 7. a sub solenoid valve; 8. a waste bin; 9. an induction device; 10. a negative pressure tank; 11. a switch is started by two hands; 12. an audible and visual alarm device; 13. a normal pressure relief valve; 14. a fingerprint identification module; 15. a pneumatic triplet; 16. a detection table; 17. an instrument table; 18. a storage cabinet; 19. a display screen.

Detailed Description

The following description is made in connection with specific embodiments of the present invention for a fluid pipe airtightness detection system.

As shown in fig. 4, a fluid pipe airtightness detection system includes a controller 1, an airtightness detector 2, a fixture, an air source mechanism, a main air passage, and a plurality of sub air passages respectively communicated with the main air passage; a main electromagnetic valve 6 is arranged on the main gas path, and sub electromagnetic valves 7 are respectively arranged on the sub gas paths; the air tightness detector 2 is communicated with the main air path; the clamp tool comprises a plurality of pneumatic clamps 3 for clamping or loosening the fluid pipe, a plurality of sealing joints 4 for sealing one end of the fluid pipe and an airtight detection joint 5 for communicating the other end of the fluid pipe; the air source mechanism is communicated with the main air path; the sub-air paths are respectively connected with the air tightness detection joint 5; the device also comprises a waste box 8, wherein an opening of the waste box 8 is provided with an induction device 9; the controller 1 is respectively and electrically connected with the air tightness detector 2, the air source mechanism, the pneumatic clamp 3, the main electromagnetic valve 6, the sub electromagnetic valve 7 and the induction device 9.

And respectively placing a plurality of pipes to be detected on a fixture tool, wherein the fixture tool is provided with a sealing joint 4 and an air tightness detection joint which are matched with the pipes to be detected. One end of the pipe to be tested is connected with the sealing joint 4, the end is sealed, the other end of the pipe to be tested is connected with the airtight detection joint 5, and then the pneumatic clamp 3 is used for clamping and fixing the pipes to be tested.

After the system is started, positive pressure or negative pressure (detection negative pressure pipe) is selected to be started according to the type of the pipes to be detected in the same batch, and the air tightness detector 2 enters a corresponding mode. The controller 1 controls the main electromagnetic valve 6 and each sub electromagnetic valve 7 to open the passage, the normal pressure relief valve 13 is closed, the air source mechanism is started, the main air path and each sub air path are inflated or exhausted, the pipes to be tested are simultaneously pressurized or exhausted to form negative pressure, then pressure maintaining is carried out, and the air tightness detector 2 starts to test. If the allowable leakage pressure of the pipe to be tested occurs in the pressure maintaining time, after the pressure maintaining time is over, all the pipes to be tested in the batch are judged to be qualified. If the allowable leakage pressure is exceeded, the controller 1 closes other sub-air paths by controlling the main electromagnetic valve 6 and the corresponding sub-electromagnetic valves 7, only one sub-air path is reserved to be communicated with the main air path, then the pipes to be tested are tested in sequence, after the detection is finished, the controller 1 controls the air tightness detector 2 and the air source mechanism to stop working, and the normal pressure relief valve 13 is opened to enable the air pressure in the main air path and the air pressure in the sub-air paths to be recovered to the normal pressure state. The controller 1 controls the pneumatic clamp 3 to unlock the fluid pipe on the sub-air passage which does not exceed the allowable leakage pressure according to the detection result of the air tightness detector 2, so that the qualified product can be conveniently taken down and placed by a worker; and unqualified fluid pipe then still is pressed from both sides tightly by pneumatic fixture 3, at this moment, only staff can remove this anchor clamps locking through manual operation to the staff still need put into waste bin 8 with unqualified pipe this moment, and whether the action of putting into has been retrieved to induction system 9 in the waste bin 8, and the induction system 9 in the waste bin 8 senses unqualified pipe and has gone into the cabin, with signal feedback to controller 1, controller 1 could control system reset, is ready to carry out next product test.

In this embodiment, the main gas path is a main gas pipe connected to the gas outlet end of the pneumatic triple piece 15, and the sub-gas paths are branch gas pipes having one end communicated with the main gas pipe and the other end communicated with the airtight detection connector 5, respectively. As shown in fig. 3, the sealing joint 4 includes a connecting block, a groove is provided on the connecting block, a sealing ring is installed in the groove, and one end of the fluid pipe is inserted into the groove and sealed by the sealing ring. The side surface of the connecting block is also provided with a pneumatic push rod and a clamping block, and the telescopic end of the pneumatic push rod is connected with the clamping block; the pneumatic push rod clamps the end part of the fluid pipe in the groove by pushing the clamping block downwards, so that the clamping effect is achieved. The air tightness detection joint 5 comprises a connecting seat, a groove is formed in the connecting seat, a sealing ring is installed in the groove, a connector is further arranged in the groove, an air flow channel is formed in the middle of the connector, and the bottom of the connector penetrates through the groove and is exposed to be communicated with the sub air path. The other end of the fluid pipe is sleeved on the connecting head and inserted into the groove and sealed by the sealing ring. And a pneumatic push rod and a clamping block are also arranged on the side surface of the connecting seat and used for clamping and fixing the other end of the fluid pipe.

The air tightness detector has the remarkable characteristics of sensitive detection, high precision, small influence of humidity and the like, can realize automatic leak detection in the whole process, greatly shortens the period of air tightness leak detection, and is widely applied to industrial production. In this embodiment, the type of the air-tightness detector is, but not limited to, yuanzhiD550 positive and negative pressure type air-tightness detector; controller 1 is, but not limited to, a SIEMENS, model S7-200 PLC editable logic controller 1.

The air tightness detector adopted in the embodiment has two pressure modes, wherein one pressure mode is positive pressure, and the other pressure mode is negative pressure. 1. Positive pressure: the output pressure used for controlling the airtight detector 2 to test is positive pressure; 2. negative pressure: when the device is used for controlling the air tightness detector 2 to test, the output pressure is negative pressure. Wherein the positive pressure gas source is from a positive pressure gas pipe in the workshop, for example, a gas pump generates pressure gas; the negative pressure air source comes from the negative pressure pump. If the tested product has no special requirements, a positive pressure test is generally selected. When the local atmospheric pressure value is at the standard 0 point, the positive pressure test indicates that the test air pressure is higher than the current value, and the negative pressure test indicates that the test air pressure is lower than the current value. No matter which pressure mode is adopted for detection, the stability of the pressure of the gas source should be ensured, and the used gas source is a clean and impurity-free gas source.

Preferably, the air source mechanism comprises a positive pressure or negative pressure air source, a normal pressure relief valve 13 and a pneumatic triple piece 15; the air inlet end of the pneumatic triple piece 15 is communicated with an air source, the air outlet end is communicated with the main air path through a normal pressure relief valve 13, and the normal pressure relief valve 13 and the air source electromagnetic valve are respectively and electrically connected with the controller 1.

In this embodiment, the controller 1 controls the air supply to be activated to provide the positive or negative pressure required by the detection system. The controller 1 controls the normal pressure relief valve 13 to open so that the internal air pressure of each air path and each fluid pipe can be recovered to the normal pressure after the detection is finished.

The pneumatic triple piece 15 can play the roles of air purification, water-vapor separation and impurity isolation in gas. Ensuring that the air tightness detector 2 can receive clean air. The pneumatic triple piece 15 includes an air filter, a pressure reducing valve, and an oil atomizer. The air filter is used for cleaning an air source, and can filter moisture in compressed air and prevent the moisture from entering the airtight detector 2 along with the air. The pressure reducing valve is used for stabilizing the pressure of the air source to ensure that the air source is in a constant state, so that the damage to hardware such as a valve or an actuator and the like caused by sudden change of the air pressure of the air source can be reduced; the oil atomizer is used for lubricating moving parts of the machine body, can lubricate parts (such as blade structures in a filter and the like) which are inconvenient to add lubricating oil, greatly prolongs the service life of the machine body, is also provided with an oil filter in the air outlet end of the pneumatic triple piece 15, is used for filtering lubricating oil possibly existing in gas, and ensures that an output gas source is clean and free of impurities. In the present embodiment, the pneumatic triplet 15 is of the type, but not limited to, an XMC type pneumatic triplet 15.

Preferably, the controller further comprises a fingerprint identification module 14, and the fingerprint identification module 14 is electrically connected with the controller 1.

The controller 1 controls the pneumatic clamp 3 to unlock the fluid pipe on the sub-air passage which does not exceed the allowable leakage pressure according to the detection result of the air tightness detector 2, so that the qualified product can be conveniently taken down and placed by a worker; the unqualified fluid pipe is still clamped by the pneumatic clamp 3, and at the moment, the clamp can be unlocked only by a worker through fingerprint unlocking, so that the further error-proofing effect is achieved, and the worker is prompted to classify and place in time; and the induction device 9 in the waste bin 8 searches whether the defective products are placed in the waste bin or not, and the controller 1 can control the system to reset to prepare for the next product test after the defective products are placed in the waste bin. Diversified mistake proofing sets up, can be timely distinguish the classification to detecting the work piece, avoid personnel to neglect to lead to the condition emergence that the defective products flowed into in the certified products.

Preferably, still including both hands starting switch 11, both hands starting switch 11 is connected with controller 1 electricity, can effectively prevent the maloperation, avoids unexpected touching to lead to the system false start.

Preferably, the controller also comprises sound and light alarm devices 12 the number of which is matched with that of the sub electromagnetic valves 7, and the sound and light alarm devices 12 are electrically connected with the controller 1.

In this embodiment, each sub-air passage is provided with an audible and visual alarm device 12, and the audible and visual alarm device 12 is of a BBJ three-color audible and visual alarm, and is used for displaying qualified and unqualified detection results. When the liquid pipe on a certain sub-gas path is detected to exceed the allowable leakage pressure, the controller controls the audible and visual alarm device 12 on the sub-gas path to sound, and the worker is prompted that the liquid pipe is unqualified. According to the setting of the controller 1, when the clamping is released through the fingerprint identification module, the sound and light alarm device 12 stops sounding.

Preferably, the sensing means 9 is a grating or an infrared sensor. The sensing device 9 is arranged at the opening of the waste bin 8. When a worker puts an unqualified product into the waste bin 8, the sensing device 9 is triggered, the sensing device 9 senses that an unqualified pipe enters the bin, a signal is fed back to the controller 1, and the controller 1 can control the system to reset to prepare for the next product test. In this embodiment, the sensing device 9 is a grating, and the specific type is but not limited to a kedun TD grating, and two gratings are correspondingly installed on two sides of the opening of the waste bin 8.

FIG. 5 is a schematic diagram of signal input and output of the controller, wherein DQa, 1, 2 are output signals to three-color audible and visual annunciators red, yellow, green; DQa5, 6, 7 are for outputting signals to the

solenoid valves

1, 2, 3; DQb5 is used for outputting start-stop signals to the positive pressure or negative pressure air source pump; DQb6 is used for outputting reset signal to the air tightness detector; DQb7 is the output start test signal; DIa0 is the air pressure normal signal input; DIa1 is grating induction signal input; DIa2 and DIa 3 are fingerprint identification signal input; DIa4, 5 and 6 are pneumatic clamp signal inputs; dib2, 3 and 4 are the signal inputs of each electromagnetic valve; DIc1 is a pump low-voltage signal input; DIc2 is a pump high-pressure signal input; DIc4 is input for detecting qualified signals; DIc5 and DIc 6 are input for detecting unqualified signals; DIc7 is input for detecting alarm signals; DId0 is the detection cycle end signal input. Fig. 6 is a schematic diagram of the overall system circuit, and fig. 7 is a power supply diagram of the main circuit. Fig. 5, 6 and 7 are only diagrams showing circuit connection modes that can be grasped by those skilled in the art from the drawings.

The scheme also provides an air tightness detection device, as shown in fig. 1 and 2, the air tightness detection device comprises the air tightness detection system and a detection table 16, wherein an instrument table 17 is arranged on one side of the upper part of the detection table 16, material holding cabinets 18 are arranged on the left side and the right side of the lower part of the detection table, an air source triplet is placed in the material holding cabinet 18 on one side, and a negative pressure pump is placed in the material holding cabinet 18 on the other side; the waste box 8 is arranged in the cabinet body at the bottom of the detection platform 16; the clamp tool is arranged on the table surface of the detection table 16; the air tightness detector 2 is arranged on the instrument table 17; a display screen 19 is also arranged on the instrument desk 17, and the display screen 19 is electrically connected with the controller 1. The display screen 19 is used for displaying the pressure values of the detected air source pressure and the pressure maintaining state, the leakage pressure values of the fluid pipes and the detection results of the fluid pipes. Specifically, the display screen 19 is embedded in the instrument table 17, and the both-hand start switch 11 is installed on the front side of the test table 16.

Claims

1. A fluid pipe air tightness detection system is characterized by comprising a controller (1), an air tightness detector (2), a clamp tool, an air source mechanism, a main air path and a plurality of sub air paths which are respectively communicated with the main air path; a main electromagnetic valve (6) is arranged on the main gas path, and sub electromagnetic valves (7) are respectively arranged on the sub gas paths; the air tightness detector (2) is communicated with the main air path; the clamp tool comprises a plurality of pneumatic clamps (3) for clamping or loosening the fluid pipe, a plurality of sealing joints (4) for sealing one end of the fluid pipe and an airtight detection joint (5) for communicating the other end of the fluid pipe; the air source mechanism is communicated with the main air path; the sub-gas circuits are respectively connected with the gas tightness detection joint (5); the device also comprises a waste box (8), and an opening of the waste box (8) is provided with an induction device (9); the controller (1) is respectively and electrically connected with the air tightness detector (2), the air source mechanism, the pneumatic clamp (3), the main electromagnetic valve (6), the sub electromagnetic valve (7) and the sensing device (9).

2. The fluid tube hermeticity detection system of claim 1 further comprising a fingerprint identification module (14), the fingerprint identification module (14) being electrically connected to the controller (1).

3. The fluid pipe airtightness detection system according to claim 1 or 2, wherein the air supply mechanism includes an air supply of positive pressure or negative pressure, an air supply solenoid valve, and a pneumatic triplet (15); the air source electromagnetic valve is electrically connected with the controller (1); the air inlet end of the pneumatic triple piece (15) is communicated with an air source, and the air outlet end is communicated with the main air path.

4. The fluid tube airtightness detection system according to claim 1 or 2, further comprising a two-hand start switch (11), the two-hand start switch (11) being electrically connected to the controller (1).

5. A fluid tube airtightness detection system according to claim 3, further comprising a two-hand start switch (11), the two-hand start switch (11) being electrically connected to the controller (1).

6. The fluid pipe airtightness detection system according to claim 1, 2 or 5, further comprising audible and visual alarm devices (12) in a number matching that of the sub solenoid valves (7), the audible and visual alarm devices (12) being electrically connected to the controller (1).

7. The fluid pipe airtightness detection system according to claim 3, further comprising sound-light alarm devices (12) in a number matching that of the sub solenoid valves (7), the sound-light alarm devices (12) being electrically connected to the controller (1).

8. A fluid pipe airtightness detection system according to claim 4, further comprising sound and light alarm devices (12) in an amount matching the number of the sub electromagnetic valves (7), the sound and light alarm devices (12) being electrically connected to the controller (1).

9. A fluid tube gas tightness detection system according to claim 1, 2, 5, 7 or 8 characterized in that the sensing means (9) is a grating or an infrared sensor.

10. A fluid tube tightness detection system according to claim 4, characterized in that the sensing means (9) is a grating or an infrared sensor.