Detection device for welding hollow stirring shaft of anaerobic fermentation engineering equipment

Abstract

The utility model relates to the field of air leakage detection equipment for shafts, in particular to a detection device for a welding hollow stirring shaft of anaerobic fermentation engineering equipment, which comprises an extension pipe rotationally connected onto the hollow stirring shaft, a rotary joint is connected onto the end part of the extension pipe, and a three-way joint is connected onto the rotary joint. A detection assembly for detecting whether the hollow stirring shaft is damaged or not is arranged on the three-way joint, and an air inlet pipe for pumping air into the hollow stirring shaft is arranged on the detection assembly. Whether the hollow stirring shaft is damaged or not is detected in the working process of the hollow stirring shaft, and the abnormal condition of the hollow stirring shaft can be found in time.

Description

Technical Field

[0001] The utility model relates to the field of air leakage detection equipment for shafts, and particularly to a detection device for a welded hollow stirring shaft of anaerobic fermentation engineering equipment. Background Technique

[0002] For anaerobic fermentation engineering equipment, the stirring shaft body is usually connected by welding or flanges in multiple sections of hollow shaft bodies. When the anaerobic fermentation engineering equipment starts to feed, a large amount of organic acids will be generated during the material acidification and hydrolysis stage, and the pH inside the equipment will drop below 6, or even lower. The stirring shaft body is a multi-section welded hollow shaft and is in this environment for up to one year or several years. Therefore, it will cause corrosion to the welded parts and blade assembly parts of the equipment, resulting in a decrease in structural strength, loosening of the connection parts, etc. In severe cases, the stirring shaft may operate abnormally and the fermentation equipment must be cleaned, thus bringing huge economic losses and safety risks.

[0003] Regarding problems such as the reduction of structural strength and the loosening of connection parts caused by corrosion of the hollow shaft body and its parts, currently, measures are taken to strengthen the corrosion resistance at the welded parts and blade assembly parts of the hollow shaft body, or other protective measures are set inside. However, for the hollow shaft body during use, if the above problems occur, they cannot be detected in time, leading to abnormalities in the fermentation engineering. Content of the Utility Model

[0004] The utility model aims to provide a detection device for a welded hollow stirring shaft of anaerobic fermentation engineering equipment to solve the problem that damage cannot be detected in time during the use of the hollow shaft body.

[0005] The detection device for a welded hollow stirring shaft of anaerobic fermentation engineering equipment in this solution includes an extension pipe rotatably connected to the hollow stirring shaft. A rotary joint is connected to the end of the extension pipe, a tee joint is connected to the rotary joint, a detection component for detecting whether the hollow stirring shaft is damaged is provided on the tee joint, and an air inlet pipe for pumping air into the hollow stirring shaft is provided on the detection component.

[0006] The beneficial effects of this solution are as follows:

[0007] By leading out an extension pipe from the hollow stirring shaft and setting a detection component on the extension pipe, air is pumped into the hollow stirring shaft through the air inlet pipe to create detection conditions for detecting the damage of the hollow stirring shaft. Moreover, the setting of the extension pipe and the detection component will not interfere with the normal operation of the hollow stirring shaft, and whether the hollow stirring shaft is damaged can be detected during its working process, enabling timely detection of abnormal conditions of the hollow stirring shaft.

[0008] Further, the extension pipe is located at a position far from the power end of the hollow stirring shaft, and the length of the extension pipe from the end of the hollow stirring shaft is 15 - 25 cm.

[0009] The beneficial effects are as follows: The position setting of the extension pipe will not interfere with the operation of the hollow stirring shaft. On the premise that the length setting can ensure the stable flow of the pumped air into the hollow stirring shaft, it can avoid the interference of the hollow stirring shaft on the detection component during operation.

[0010] Furthermore, the detection component includes a diaphragm pressure gauge, an explosion-proof pressure transmitter, a vibration sensor, and a manual-automatic electric valve. The diaphragm pressure gauge is connected to the top of the three-way joint. The three-way joint is connected to a gun-shaped four-way pipe. The end of the gun-shaped four-way pipe is connected to the manual-automatic electric valve. The explosion-proof pressure transmitter, the vibration sensor, and the manual-automatic electric valve are connected through the gun-shaped four-way pipe. The explosion-proof pressure transmitter is connected to the top position of the vibration sensor. The vibration sensor and the explosion-proof pressure transmitter are arranged adjacent to the diaphragm pressure gauge. The end of the manual-automatic electric valve is connected to the air inlet pipe.

[0011] The beneficial effects are as follows: The specific setting of the detection component can simultaneously detect the air pressure after pumping air and the vibration of the hollow stirring shaft during operation, so as to judge whether the hollow stirring shaft is damaged from multiple aspects, improve the perfection of the judgment basis, and make the judgment structure more accurate.

[0012] Furthermore, the vibration sensor is signal-connected to a PLC controller. The PLC controller is signal-connected to a host computer for displaying the transmitted data. The PLC controller is signal-connected to the explosion-proof pressure transmitter.

[0013] The beneficial effects are as follows: The setting of the PLC controller can facilitate subsequent automatic control.

[0014] Furthermore, a safety valve is connected between the manual-automatic electric valve and the vibration sensor. The safety valve is located on the gun-shaped four-way pipe.

[0015] The beneficial effects are as follows: The setting of the safety valve can ensure the air pressure safety of the pumped air entering the hollow stirring shaft.

[0016] Furthermore, the three-way joint is connected to a fixed support for support. The fixed support is fixed to the outer wall of the fermentation equipment. The fixed support is arranged parallel to the extension pipe.

[0017] The beneficial effects are as follows: The setting of the fixed support improves the stability during the use of the entire equipment and reduces the interference caused by its own vibration during the use of the detection component.

[0018] Furthermore, the air inlet pipe is connected to an air pump for pumping air. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1The front view of the embodiment of the detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment of the present utility model;

[0020] Figure 2 The structural schematic diagram of the hollow stirring shaft of the present utility model. Specific embodiments

[0021] The following is a further detailed description through specific embodiments.

[0022] The reference numerals in the attached drawings of the specification include: stirring motor 1, front shaft body 2, middle shaft body 3, rear shaft body 4, front shaft bracket 5, middle shaft bracket 6, detection device 7, extension pipe 8, rotating joint 9, three-way joint 10, fixed bracket 11, diaphragm pressure gauge 12, explosion-proof pressure transmitter 13, vibration sensor 14, safety valve 15, manual and automatic electric valve 16, air inlet pipe 17, gun-shaped four-way pipe 18.

[0023] Embodiment

[0024] The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment is used to detect the hollow stirring shaft as Figure 2 shown. The stirring motor 1 drives the hollow stirring shaft to rotate. The hollow stirring shaft includes a front shaft body 2, a middle shaft body 3, and a rear shaft body 4 arranged in sequence from the side of the stirring motor. A front shaft bracket 5 is connected to the front shaft body 2, and a middle shaft bracket 6 is connected to the middle shaft body 3. A detection device 7 is arranged at the end of the hollow stirring shaft far from the stirring motor 1.

[0025] For Figure 2 the specific structure of the detection of the hollow stirring shaft is as Figure 1 shown: It includes an extension pipe 8 rotatably connected to the hollow stirring shaft. The rotational connection between the extension pipe 8 and the hollow stirring shaft is carried out through an existing rotating joint 9. The extension pipe 8 is located at the end far from the power end of the hollow stirring shaft. The power end is the motor end of the hollow stirring shaft. The length of the extension pipe 8 from the end of the hollow stirring shaft is 15 - 25 cm. A rotary joint is connected to the end of the extension pipe 8. The rotary joint is a right-angle rotary joint. The rotating part of the rotary joint is in threaded fit with the extension pipe 8. A three-way joint 10 is connected to the rotary joint, that is, the lower interface of the three-way joint 10 is in threaded fit with the other interface of the rotary joint.

[0026] A detection component for detecting whether the hollow stirring shaft is damaged is installed on the three-way joint 10. An air inlet pipe 17 for pumping air into the hollow stirring shaft is connected to the detection component.

[0027] The detection component includes a diaphragm pressure gauge 12, an explosion-proof pressure transmitter 13, a vibration sensor 14, and a manual-automatic electric valve 16. The diaphragm pressure gauge 12 is connected to the top of the three-way joint 10. The three-way joint 10 is connected to a gun-shaped four-way pipe 18. The explosion-proof pressure transmitter 13, the vibration sensor 14, and the safety valve 15 are connected through the gun-shaped four-way pipe 18. That is, the diaphragm pressure gauge 12 is threadedly fitted in the upper interface of the three-way joint 10. The other end of the three-way joint 10 is connected to the vibration sensor 14. That is, the left interface of the three-way joint 10 is connected to the gun-shaped four-way pipe 18. The vibration sensor 14 is threadedly fitted in the lower interface of the gun-shaped four-way pipe 18. The explosion-proof pressure transmitter 13 is connected to the top position of the vibration sensor 14. That is, the explosion-proof pressure transmitter 13 is threadedly fitted in the upper interface of the gun-shaped four-way pipe 18 directly above the vibration sensor 14. The end of the gun-shaped four-way pipe 18 is connected to the manual-automatic electric valve 16. That is, the safety valve 15 is threadedly fitted in an upper interface of the gun-shaped four-way pipe 18 adjacent to the pressure transmitter. There is a safety valve 15 connected between the manual-automatic electric valve 16 and the vibration sensor 14. The safety valve 15 is located on the gun-shaped four-way pipe. The end of the manual-automatic electric valve 16 is connected to the air inlet pipe 17. That is, the left end of the manual-automatic electric valve 16 is threadedly fitted with the air inlet pipe 17. The air inlet pipe 17 is connected to an air pump for pumping air.

[0028] The vibration sensor 14 is signal-connected to a PLC controller. The PLC controller can be an existing product and is selected and set according to actual needs. The PLC controller is signal-connected to a host computer for displaying the transmitted data. The host computer is selected according to actual needs. The PLC controller is signal-connected to the explosion-proof pressure transmitter 13.

[0029] A fixing bracket 11 for support is welded to the three-way joint 10. That is, the fixing bracket 11 is welded to the middle of the right part of the three-way joint 10. The fixing bracket 11 is welded to the outer wall of the fermentation equipment. The fixing bracket 11 is arranged parallel to the extension pipe 8.

[0030] During detection, air is introduced into the shaft body through the extension pipe 8 connected to the hollow stirring shaft. The on-off of the air path is realized through the manual-automatic electric valve 16. The gas pressure relief is realized by the safety valve 15. The diaphragm pressure gauge 12 is used for pressure monitoring. The vibration sensor 14 and the explosion-proof pressure transmitter 13 transmit the vibration data and pressure data to the PLC controller remotely. The PLC controller processes the data and executes actions and displays the results. Air is pumped into the hollow stirring shaft through the air inlet pipe 17 to create detection conditions for the damage detection of the hollow stirring shaft. The setting of the extension pipe 8 and the detection component does not interfere with the normal operation of the hollow stirring shaft. Whether the hollow stirring shaft is damaged is detected during its working process, and the abnormal conditions of the hollow stirring shaft can be found in time. The whole device has a simple structure, is convenient to install, and has low equipment cost and low use and maintenance cost.

[0031] In actual implementation, the processing of the PLC controller can be set according to actual requirements. The program related to the PLC controller processing can achieve the purpose based on existing conventional judgment statements. For example, the judgment after detection is carried out in the following order:

[0032] (1) Before the equipment runs, clear the warning level to 0. At the same time, check whether the connection of the fixed bracket 11 is firm, check whether the rotary joint is operating normally, check whether the action of the manual-automatic electric valve 16 is normal, check whether the safety valve 15 can work normally, check whether the remote transmission terminal display of the explosion-proof pressure transmitter 13 is normal, and whether the remote transmission pressure data is consistent with the local display of the diaphragm pressure gauge 12; if abnormal, perform debugging;

[0033] (2) Open the manual-automatic electric valve 16 and start the air pump to blow air into the shaft body;

[0034] (3) The PLC controller executes an action, and the air pump blows and fills air into the hollow shaft body;

[0035] (4) The PLC controller judges whether the value of the explosion-proof pressure transmitter 13 ≥ the set pressure upper limit P1 holds. If so, sequentially execute and enter step (5); otherwise, start the timeout timer T1. The PLC judges whether T1 ≥ the set timeout time T0 holds. If it holds, the terminal displays "There is an air leakage in the shaft body / detection device", and perform equipment inspection, then return to execute step (1). If it does not hold, return to step (2);

[0036] (5) The PLC controller executes an action, and the air pump stops blowing and filling air into the hollow shaft body;

[0037] (6) The PLC controller executes an action, closes the manual-automatic electric valve 16, and executes step (7)

[0038] (7) The PLC controller makes a judgment and executes steps (8) and (9);

[0039] (8) The PLC controller judges whether the value of the explosion-proof pressure transmitter 13 < the set pressure lower limit P2 holds. If so, sequentially execute and enter step (10); otherwise, the terminal displays "There is no leakage in the shaft body";

[0040] (9) The PLC controller judges whether the value of the vibration sensor 14 < the set vibration value S1 holds. If so, the terminal displays "The state of the mixing shaft is normal"; otherwise, execute step (11);

[0041] (10) The terminal displays "Yellow warning for air leakage in the mixing shaft", and the warning level is increased by 1;

[0042] (11) The terminal displays "Yellow warning for abnormality in the mixing shaft", and the warning level is increased by 1;

[0043] (12) The PLC controller determines whether the warning level ≥ 2 holds. If so, step (13) is executed; if not, it returns to step (7).

[0044] (13) The terminal displays "Red warning for abnormal mixing shaft".

[0045] (14) The equipment stops operating in sequence.

[0046] With the pressure and vibration detected by the device, two - level warning monitoring is carried out to make the detection results more timely and accurate.

[0047] The above are only embodiments of the present utility model. Specific structures and common knowledge such as characteristics well - known in the art are not described in detail herein. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. Detection device for welded hollow stirring shaft of anaerobic fermentation engineering equipment, characterized in that: It includes an extension pipe rotatably connected to a hollow stirring shaft. A rotary joint is connected to the end of the extension pipe. A three-way joint is connected to the rotary joint. A detection component for detecting whether the hollow stirring shaft is damaged is provided on the three-way joint. An air inlet pipe for pumping air into the hollow stirring shaft is provided on the detection component.

2. The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment according to claim 1, wherein: The extension pipe is located at the power end away from the hollow stirring shaft. The length of the extension pipe from the end of the hollow stirring shaft is 15 - 25 cm.

3. The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment according to claim 2, characterized in that: The detection component includes a diaphragm pressure gauge, an explosion-proof pressure transmitter, a vibration sensor, and a manual-automatic electric valve. The diaphragm pressure gauge is connected to the top of the three-way joint. The three-way joint is connected to a gun-shaped four-way pipe. The end of the gun-shaped four-way pipe is connected to the manual-automatic electric valve. The explosion-proof pressure transmitter, the vibration sensor, and the manual-automatic electric valve are connected through the gun-shaped four-way pipe. The explosion-proof pressure transmitter is connected to the top position of the vibration sensor. The vibration sensor and the explosion-proof pressure transmitter are arranged adjacent to the diaphragm pressure gauge. The end of the manual-automatic electric valve is connected to the air inlet pipe.

4. The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment according to claim 3, characterized in that: The vibration sensor is signal-connected to a PLC controller. The PLC controller is signal-connected to a host computer for displaying the transmitted data. The PLC controller is signal-connected to the explosion-proof pressure transmitter.

5. The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment according to claim 3, characterized in that: A safety valve is connected between the manual-automatic electric valve and the vibration sensor. The safety valve is located on the gun-shaped four-way pipe.

6. The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment according to claim 3, characterized in that: The three-way joint is connected to a fixed bracket for support. The fixed bracket is fixed to the outer wall of the fermentation equipment. The fixed bracket is arranged parallel to the extension pipe.

7. The detection device for the welded hollow stirring shaft of the anaerobic fermentation engineering equipment according to claim 1, characterized in that: The air inlet pipe is connected to an air pump for pumping air.

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