A multi-way valve pressure detection mechanism

Abstract

The present invention relates to the field of pressure detection, and discloses a multi-way valve pressure detection mechanism, comprising a multi-way valve body, an air inlet pipe is fixedly installed on one side of the multi-way valve body, a pressure measuring tube is fixedly installed on the top of the air inlet pipe, and also comprises: a stabilizing component, the stabilizing component comprises a rotating rod rotatably installed in the pressure measuring tube, a rotating plate is fixedly installed on the bottom end of the rotating rod, a cross plate is fixedly installed on the top end of the rotating rod, and a piston plate is sealingly and slidably installed in the inner cavity of the pressure measuring tube; the impact force generated by instantaneous airflow fluctuation can be buffered and its speed can be slowed down, and the pressure can be automatically relieved according to the size of the pressure, which can effectively improve the stability of the pressure detection process, and improve the safety while improving the working efficiency of the pneumatic system, avoiding the instability of the pressure detection process caused by the influence of instantaneous airflow fluctuation in the past.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure detection, and more specifically, to a multi-way valve pressure detection mechanism. Background Art

[0002] A multi-way valve is a valve that can switch between multiple fluid channels. It is widely used in hydraulic and pneumatic systems. It can control the drive of multiple actuators, allowing a single control signal to operate multiple devices. The pressure detection of the multi-way valve is an important part of ensuring the normal operation of the hydraulic or pneumatic system. By monitoring and adjusting the pressure, it can effectively prevent system failures and ensure the safe and efficient operation of the equipment. Multi-way valves are generally divided into the following types: hydraulic multi-way valves, pneumatic multi-way valves, manual and automatic multi-way valves.

[0003] Pneumatic multi-way valves are usually used in pneumatic systems to control the switching and distribution of airflow. In order to ensure the normal operation of the pneumatic system, real-time detection of the internal pressure of the pneumatic multi-way valve in the working state is an extremely important process. During the pressure detection process of the pneumatic multi-way valve, the airflow inside it will fluctuate instantaneously. The following are the situations in which the airflow fluctuates instantaneously:

[0004] Valve switching: When the pneumatic multi-way valve switches its working state, the instantaneous change in air flow rate will lead to an increase in air flow fluctuations;

[0005] Pressure transients: When pressure values ​​change suddenly, such as when the system starts or shuts down, the airflow rate will increase or decrease instantaneously, causing fluctuations;

[0006] Gas source fluctuation: The instability of gas source pressure can also cause instantaneous fluctuations in airflow;

[0007] However, under the influence of instantaneous fluctuations in airflow, the pressure detection process will become unstable, which will not only affect the accuracy of pressure measurement data, but also lead to misjudgment of pressure and false alarms, causing staff to mistakenly believe that the pneumatic system has failed, resulting in unnecessary shutdowns or maintenance, thereby reducing the working efficiency of the entire pneumatic system. Summary of the invention

[0008] The present invention provides a multi-way valve pressure detection mechanism, which can buffer the impact force generated by instantaneous airflow fluctuations and slow down its speed, and can automatically release pressure according to the size of the pressure, which can effectively improve the stability of the pressure detection process, and improve the safety while improving the working efficiency of the pneumatic system, thereby solving the technical problem in the related art that the pressure detection process will be unstable under the influence of instantaneous airflow fluctuations.

[0009] The present invention provides a multi-way valve pressure detection mechanism, comprising a multi-way valve body, an air intake pipe is fixedly installed on one side of the multi-way valve body, a pressure measuring tube is fixedly installed on the top of the air intake pipe, and further comprising:

[0010] A stabilizing component, the stabilizing component includes a rotating rod rotatably installed in the pressure measuring tube, a rotating plate is fixedly installed on the bottom end of the rotating rod, a cross plate is fixedly installed on the top end of the rotating rod, a piston plate is sealingly and slidably installed on the inner cavity of the pressure measuring tube, a vertical rod is fixedly installed on the top of the piston plate, the vertical rod is slidably installed with the pressure measuring tube, a telescopic spring is fixedly installed between the piston plate and the top wall of the inner cavity of the pressure measuring tube, an indicator block is fixedly installed on the top end of the vertical rod, a scale plate is contacted with one side of the indicator block, and the scale plate is fixedly installed on the top of the pressure measuring tube.

[0011] As a further optimization scheme of the present invention, air outlets are evenly arranged in the body of the multi-way valve, and each group of the air outlets is connected to the inner cavity of the air inlet pipe, and the inner cavity of each group of the air outlets is installed with a control device, a circular tube is arranged on the upper side of the cross plate, and one side of the circular tube is fixedly installed to the inner cavity wall of the pressure measuring tube, and a fan blade is rotatably installed on the inner cavity of the circular tube, and one end of the fan blade and the top of the cross plate are fixedly installed with a bevel gear, and two groups of the bevel gears are meshed and installed, and a reflux hole is arranged in the inner wall of the side of the pressure measuring tube close to the circular tube, and the two ends of the reflux hole are respectively connected to the air inlet pipe and the inner cavity of the circular tube, and a one-way valve is installed in the inner cavity of the reflux hole, and a baffle is arranged on the side of the rotating plate away from the multi-way valve body, and the baffle is fixedly installed to the inner cavity of the air inlet pipe.

[0012] As a further optimization scheme of the present invention, a top plate is arranged above the pressure measuring tube, the top plate is fixedly installed with the pressure measuring tube, a nozzle is fixedly installed on the side of the indicator block away from the scale plate, an air outlet is opened on the top of the pressure measuring tube, the other end of the nozzle is fixedly installed with the top end of the air outlet, the two ends of the air outlet are respectively connected with the nozzle and the inner cavity of the pressure measuring tube, and a groove is opened on one side of the inner cavity of the pressure measuring tube.

[0013] As a further optimization scheme of the present invention, a telescopic rod is fixedly installed on one side of the bottom of the top plate, contact blocks are fixedly installed on the bottom end of the telescopic rod and the top of the indicator block, an alarm is fixedly installed on one side of the top of the top plate, two groups of the contact blocks are connected in series with the alarm, and the output end of the nozzle is facing the top of the contact block on the lower side.

[0014] As a further optimization scheme of the present invention, the grooved inner cavity is slidably installed with an L-shaped plate, the L-shaped plate is fixedly installed on the top of the piston plate, a sliding groove is provided on the bottom wall of the grooved inner cavity, and a movable plate is sealed and slidably installed in the inner cavity of the sliding groove, and the top of the movable plate is fixedly installed on the L-shaped plate.

[0015] As a further optimization scheme of the present invention, a vent is provided on one side wall of the pressure measuring tube, and the vent is connected to the inner cavity of the pressure measuring tube, the inner cavity of the slide groove and the outside world, and a through hole compatible with the vent is provided on the movable plate.

[0016] As a further optimization solution of the present invention, the distance between the bottom of the piston plate and the bottom wall of the slotted inner cavity is smaller than the distance between the two groups of contact blocks.

[0017] As a further optimization solution of the present invention, the pipe between the nozzle and the top end of the air outlet is retractable.

[0018] As a further optimization solution of the present invention, a roller is rollingly mounted on the side of the indicating block that contacts the scale plate.

[0019] As a further optimization solution of the present invention, a through opening adapted to the nozzle is opened on the top plate.

[0020] The beneficial effects of the present invention are:

[0021] 1. The multi-way valve pressure detection mechanism described in the present invention can change the flow path of the airflow and reduce the flow rate of the airflow by rotating the cross plate, thereby avoiding the instability of the pressure detection process caused by the instantaneous fluctuation of the airflow in the past, and can effectively improve the normal stability of the pressure in the pressure measuring tube, thereby effectively improving the accuracy of the pressure measurement data.

[0022] 2. The multi-way valve pressure detection mechanism described in the present invention can rotate the cross plate to drive the fan blades to rotate. The fan blades will suck the gas under the piston plate into the circular tube while rotating. The gas in the circular tube will be blown into the reflux hole by the fan blades and then discharged into the inner cavity of the intake pipe, thereby achieving the purpose of reflux. It can avoid the situation where the residual and accumulation of gas affect the pressure detection, and can effectively improve the stability of pressure detection, thereby effectively improving the effect of pressure detection.

[0023] 3. The multi-way valve pressure detection mechanism described in the present invention has a slot setting. When the pressure exceeds the stable value, the gas below the piston plate will be discharged to the top of the piston plate through the slot, and then flow into the air outlet and be discharged through the nozzle. It plays the role of automatic pressure relief when the pressure is not high, and can discharge the excess gas in the intake pipe to reduce the pressure. It can keep the pressure in the intake pipe within a reasonable range to make it more stable, avoid the alarm caused by instantaneous pressure fluctuations, and thus avoid unnecessary shutdown or maintenance, which can effectively improve the working efficiency of the entire pneumatic system.

[0024] 4. In the multi-way valve pressure detection mechanism described in the present invention, when the pressure exceeds the limit value, the movable plate will drive the vent port to connect with the through hole, and the gas under the piston plate will be vented again through the vent port and the through hole, and secondary pressure relief will be achieved, which can avoid the situation where the pressure is too high and cannot be discharged, causing damage to the pipeline, valve or explosion under severe conditions, and at the same time avoid the situation where the staff fails to arrive in time to deal with it. Through the pressure relief measures, the service life of the pneumatic system can be effectively improved, and the occurrence of failures can be reduced, thereby effectively improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the front side of the present invention;

[0026] Figure 2 is a cross-sectional view of an air intake pipe of the present invention;

[0027] Figure 3 The present invention Figure 2 Schematic diagram of the local structure;

[0028] Figure 4 The present invention Figure 3 A magnified view of the structure of the middle part A;

[0029] Figure 5 is an overall cross-sectional view of the present invention;

[0030] Figure 6 The present invention Figure 5 Schematic diagram of the local structure.

[0031] In the figure: 1. multi-way valve body; 2. air inlet pipe; 3. pressure measuring tube; 4. piston plate; 5. vertical rod; 6. telescopic spring; 7. indicator block; 8. scale plate; 9. rotating rod; 10. rotating plate; 11. baffle; 12. cross plate; 13. roller; 14. through port; 15. round tube; 16. fan blade; 17. bevel gear; 18. reflux hole; 19. top plate; 20. telescopic rod; 21. contact block; 22. alarm; 23. slot; 24. air outlet; 25. nozzle; 26. slide groove; 27. movable plate; 28. L-shaped plate; 29. ​​air vent; 30. through hole; 31. air outlet; 32. control device. DETAILED DESCRIPTION

[0032] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0033] like Figures 1 to 6 As shown, a multi-way valve pressure detection mechanism according to an embodiment of the present invention comprises a multi-way valve body 1, an air intake pipe 2 is fixedly installed on one side of the multi-way valve body 1, a pressure measuring pipe 3 is fixedly installed on the top of the air intake pipe 2, and further comprises:

[0034] A stabilizing component includes a rotating rod 9 rotatably installed in the pressure measuring tube 3, a rotating plate 10 is fixedly installed on the bottom end of the rotating rod 9, a cross plate 12 is fixedly installed on the top end of the rotating rod 9, a piston plate 4 is sealingly and slidably installed on the inner cavity of the pressure measuring tube 3, a vertical rod 5 is fixedly installed on the top of the piston plate 4, the vertical rod 5 is slidably installed with the pressure measuring tube 3, a telescopic spring 6 is fixedly installed between the piston plate 4 and the top wall of the inner cavity of the pressure measuring tube 3, an indicating block 7 is fixedly installed on the top end of the vertical rod 5, a scale plate 8 is contacted with one side of the indicating block 7, and the scale plate 8 is fixedly installed with the top of the pressure measuring tube 3.

[0035] Air outlets 31 are evenly arranged in the multi-way valve body 1, and each group of air outlets 31 is connected to the inner cavity of the air inlet pipe 2, and the inner cavity of each group of air outlets 31 is installed with a control device 32. A circular tube 15 is arranged on the upper side of the cross plate 12, and one side of the circular tube 15 is fixedly installed to the inner cavity wall of the pressure measuring tube 3, and a fan blade 16 is rotatably installed in the inner cavity of the circular tube 15. One end of the fan blade 16 and the top of the cross plate 12 are fixedly installed with a bevel gear 17, and two groups of bevel gears 17 are meshed and installed. A reflux hole 18 is arranged in the inner wall of the pressure measuring tube 3 on the side close to the circular tube 15, and the two ends of the reflux hole 18 are respectively connected to the inner cavity of the air inlet pipe 2 and the circular tube 15, and a one-way valve is installed in the inner cavity of the reflux hole 18. A baffle 11 is arranged on the side of the rotating plate 10 away from the multi-way valve body 1, and the baffle 11 is fixedly installed to the inner cavity of the air inlet pipe 2.

[0036] It should be noted that, first, the output pipe of the pneumatic system is fixedly installed on the right end of the air inlet pipe 2, and a threaded hole is set in the outer end of each group of air outlet ports 31, and then the external pipe is installed with the threaded hole in the air outlet port 31. The air outlet port 31 can be controlled to be connected or closed with the air inlet pipe 2 according to actual needs through the control device 32, so as to realize multi-pipeline or single-pipeline output. The prior art will not be repeated here. When the output pipe of the pneumatic system transports gas to the air inlet pipe 2, the gas in the air inlet pipe 2 will be output through the air outlet port 31 connected with its inner cavity. When the pressure in the air inlet pipe 2 exceeds the stable value, the pressure in the inner cavity of the pressure measuring tube 3 under the piston plate 4 will also increase accordingly. The increase in pressure will push the piston plate 4 to move upward and squeeze the telescopic spring 6. When the piston plate 4 moves upward, it will drive the indicator block 7 to move upward synchronously through the vertical rod 5. The setting of the indicator block 7 and the scale plate 8 allows the staff to more intuitively see the pressure changes in the air inlet pipe 2.

[0037] When the gas flows to the left in the intake pipe 2, the baffle 11 covers half of the rotating plate 10 through the setting of the baffle 11. At this time, the gas flow will blow the rotating plate 10 to rotate. When the rotating plate 10 rotates, it will drive the cross plate 12 to rotate synchronously through the rotating rod 9. When the airflow in the intake pipe 2 fluctuates instantaneously, the airflow in the intake pipe 2 will instantly flow into the pressure measuring tube 3. The rotation of the cross plate 12 can change the flow path of the airflow and reduce the flow rate of the airflow, which can avoid the instability of the pressure detection process caused by the influence of the instantaneous fluctuation of the airflow in the past, and can effectively improve the normal stability of the pressure in the pressure measuring tube 3, thereby effectively improving the accuracy of the pressure measurement data;

[0038] The instantaneous fluctuating airflow will continue to flow upward to the bottom of the piston plate 4 after being slowed down by the cross plate 12. When the cross plate 12 rotates, it will drive the bevel gear 17 on its top to rotate synchronously. The cooperation of the two sets of bevel gears 17 can drive the fan blades 16 to rotate synchronously. When the fan blades 16 rotate, the gas under the piston plate 4 will be sucked into the circular tube 15. The gas in the circular tube 15 will be blown into the reflux hole 18 by the fan blades 16 and then discharged into the inner cavity of the intake pipe 2, which serves the purpose of reflux and avoids the situation where the residual and aggregation of gas affect the pressure detection. The stability of the pressure detection can be effectively improved, thereby effectively improving the effect of the pressure detection. By setting the one-way valve in the reflux hole 18, the gas in the intake pipe 2 cannot be directly discharged into the reflux hole 18.

[0039] like Figure 3 and Figure 6As shown, a top plate 19 is provided above the pressure measuring tube 3, and the top plate 19 is fixedly installed with the pressure measuring tube 3. A nozzle 25 is fixedly installed on the side of the indicating block 7 away from the scale plate 8. An air outlet 24 is provided on the top of the pressure measuring tube 3. The other end of the nozzle 25 is fixedly installed with the top of the air outlet 24. The two ends of the air outlet 24 are respectively connected with the nozzle 25 and the inner cavity of the pressure measuring tube 3. A groove 23 is provided on one side of the inner cavity of the pressure measuring tube 3.

[0040] A telescopic rod 20 is fixedly installed on one side of the bottom of the top plate 19, and contact blocks 21 are fixedly installed on the bottom end of the telescopic rod 20 and the top end of the indicator block 7. An alarm 22 is fixedly installed on one side of the top of the top plate 19. The two groups of contact blocks 21 and the alarm 22 are connected in series, and the output end of the nozzle 25 is facing the top of the lower contact block 21.

[0041] It should be noted that when the pressure in the intake pipe 2 increases, the pressure in the pressure measuring tube 3 below the piston plate 4 will increase and push the piston plate 4 upward and squeeze the telescopic spring 6. The upward movement of the piston plate 4 will drive the indicator block 7 to move upward synchronously through the vertical rod 5. The indicator block 7 will drive the contact block 21 on its top to move synchronously while moving upward. When the pressure exceeds the limit value, the contact block 21 on the lower side will contact the contact block 21 on the upper side. At this time, the alarm 22 will be controlled to turn on and alarm, which can be used to provide an alarm reminder to the staff. When the pressure exceeds the stable value, the pressure cannot push the bottom of the piston plate 4 higher than the bottom wall of the inner cavity of the slot 23. At this time, the pressure will not have any effect. When the pressure pushes the piston plate 4 When the bottom of the piston plate 4 moves to the top of the slot 23, the bottom and top of the piston plate 4 are connected through the slot 23, so that the gas under the piston plate 4 can be discharged to the top of the piston plate 4 through the slot 23, and then flow into the air outlet 24 and be discharged through the nozzle 25, so as to achieve pressure relief. Since the pressure is not enough at this time, the two groups of contact blocks 21 are in contact, and there is no need for alarm. It plays the role of automatic pressure relief when the pressure is not large, and can achieve the discharge of excess gas in the intake pipe 2 to reduce the pressure. It can keep the pressure in the intake pipe 2 within a reasonable range, making it more stable, avoiding the situation where an alarm occurs due to instantaneous pressure fluctuations, thereby performing unnecessary shutdown or maintenance, and effectively improving the working efficiency of the entire pneumatic system;

[0042] While reducing the pressure, when the excess gas in the air inlet pipe 2 is discharged through the air outlet 24 and the nozzle 25, the nozzle 25 will blow air to the top of the lower contact block 21, so as to clean the top of the contact block 21 and improve the cleanliness of the top of the lower contact block 21. At the same time, the two groups of contact blocks 21 will be cleaned before each contact, which can prevent impurities from falling to the top and affecting the trigger sensitivity when the two groups of contact blocks 21 are in contact, thereby effectively improving the effect of triggering the control alarm.

[0043] like Figures 3 to 6As shown, an L-shaped plate 28 is slidably installed in the inner cavity of the slot 23, and the L-shaped plate 28 is fixedly installed on the top of the piston plate 4. A sliding groove 26 is provided on the bottom wall of the inner cavity of the slot 23, and a movable plate 27 is sealed and slidably installed in the inner cavity of the sliding groove 26, and the top of the movable plate 27 is fixedly installed on the L-shaped plate 28.

[0044] A vent 29 is provided on one side wall of the pressure measuring tube 3 , and the vent 29 is connected to the inner cavity of the pressure measuring tube 3 , the inner cavity of the slide groove 26 and the outside. A through hole 30 matching the vent 29 is provided on the movable plate 27 .

[0045] It should be noted that when the pressure in the air intake pipe 2 exceeds the limit value, the pressure will cause the piston plate 4 to drive the indicating block 7 to move upward through the vertical rod 5, and the upper and lower parts of the piston plate 4 will be connected through the slot 23 and exhaust and pressure relief will be carried out through the air outlet 24 and the nozzle 25. When the pressure relief through the nozzle 25 cannot reduce the pressure, the pressure will continue to push the piston plate 4 to move upward, and the indicating block 7 will drive the contact block 21 on the lower side to continue to move upward to contact the contact block 21 on the upper side and then continue to move upward. At this time, the two groups of contact blocks 21 will move upward after contact, squeezing the telescopic rod 20 to contract. When the piston plate 4 moves upward, it will drive the movable plate 27 to move upward synchronously through the L-shaped plate 28, and the movable plate 27 slides in the inner cavity of the slide groove 26. When the telescopic rod 20 is retracted to the maximum extent, the two groups of contact blocks 21 cannot continue to move upward. At this time, the movable plate 27 will drive the through hole 30 thereon to move to the position of the air vent 29 and be in a connected state with the air vent 29. At this time, the gas under the piston plate 4 will be vented again through the air vent 29 and the through hole 30, and secondary pressure relief will be achieved, which can avoid the situation where the pressure is too high and cannot be discharged, causing damage to the pipeline, valve or explosion in a serious state. In this process, the contact block 21 will control the alarm 22 to continue to alarm, and at the same time, it can avoid the situation where the staff fails to arrive in time to deal with it. Through the pressure relief measures, the service life of the pneumatic system can be effectively improved, and the occurrence of failures can be reduced, thereby effectively improving safety;

[0046] When the two groups of contact blocks 21 move away from each other, the upper contact block 21 will be automatically driven downward to the initial position by the gravity of the telescopic rod 20 itself.

[0047] like Figure 3 and Figure 6 As shown, the distance between the bottom of the piston plate 4 and the bottom wall of the inner cavity of the slot 23 is smaller than the distance between the two groups of contact blocks 21 .

[0048] The pipe between the nozzle 25 and the top of the air outlet 24 is retractable.

[0049] A roller 13 is rotatably mounted on the side of the indicating block 7 that contacts the scale plate 8 .

[0050] The top plate 19 is provided with a through opening 14 adapted to the nozzle 25 .

[0051] It should be noted that, since the distance between the bottom of the piston plate 4 and the bottom wall of the inner cavity of the slot 23 is smaller than the distance between the two groups of contact blocks 21, automatic pressure relief can be achieved without the alarm 22 sounding. The pipeline between the nozzle 25 and the top of the air outlet 24 is retractable. At the same time, the setting of the opening 14 on the top plate 19 will not affect the upward movement of the nozzle 25 driven by the indicator block 7. By setting the roller 13 on one side of the indicator block 7, the friction of the indicator block 7 moving on the scale plate 8 can be reduced, and the service life of the components can be improved.

[0052] Working principle: first, the output pipe of the pneumatic system is fixedly installed on the right end of the air inlet pipe 2, and then the external pipe is installed on the air outlet 31. The multi-pipeline or single-pipeline output can be controlled by the control device 32 according to actual needs. The gas is transported to the air inlet pipe 2 through the output pipe of the pneumatic system. The gas in the air inlet pipe 2 flows to the left and blows the rotating plate 10 to drive the cross plate 12 to rotate. The rotation of the cross plate 12 will reduce the speed of the air flow after buffering. At the same time, the fan blades 16 will guide the air flow after the speed is slowed down into the air inlet pipe 2. When pressure is generated in the air inlet pipe 2, it will move upward. The measured pressure value can be intuitively seen through the cooperation of the indicator block 7 and the scale plate 8. When the pressure exceeds the stable value, the nozzle 25 will automatically release the pressure and clean the top of the lower contact block 21. When the pressure exceeds the limit value, the two groups of contact blocks 21 will contact the control alarm 22 to alarm and remind the staff. At the same time, the cooperation of the air release port 29 and the through hole 30 can realize secondary pressure relief in the air inlet pipe 2, so as to improve safety.

[0053] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A multi-way valve pressure detection mechanism, comprising a multi-way valve body (1), an air intake pipe (2) fixedly mounted on one side of the multi-way valve body (1), a pressure measuring tube (3) fixedly mounted on the top of the air intake pipe (2), characterized in that: Also includes: A stabilizing component, the stabilizing component comprising a rotating rod (9) rotatably mounted in the pressure measuring tube (3), a rotating plate (10) being fixedly mounted on the bottom end of the rotating rod (9), a cross plate (12) being fixedly mounted on the top end of the rotating rod (9), a piston plate (4) being sealingly and slidably mounted on the inner cavity of the pressure measuring tube (3), a vertical rod (5) being fixedly mounted on the top of the piston plate (4), the vertical rod (5) being slidably mounted on the pressure measuring tube (3), a telescopic spring (6) being fixedly mounted between the piston plate (4) and the inner cavity top wall of the pressure measuring tube (3), an indicating block (7) being fixedly mounted on the top end of the vertical rod (5), a scale plate (8) being contacted with one side of the indicating block (7), and the scale plate (8) being fixedly mounted on the top of the pressure measuring tube (3); The multi-way valve body (1) is evenly provided with air outlets (31), each group of the air outlets (31) is connected to the inner cavity of the air inlet pipe (2), and the inner cavity of each group of the air outlets (31) is installed with a control device (32). A round tube (15) is provided on the upper side of the cross plate (12), and one side of the round tube (15) is fixedly installed with the inner cavity wall of the pressure measuring tube (3). A fan blade (16) is rotatably installed in the inner cavity of the round tube (15), and one end of the fan blade (16) is fixedly installed with the top of the cross plate (12). A bevel gear (17) is fixedly installed, and two groups of the bevel gears (17) are meshedly installed. A reflux hole (18) is opened in the inner wall of the pressure measuring tube (3) on the side close to the circular tube (15), and the two ends of the reflux hole (18) are respectively connected to the inner cavity of the air inlet pipe (2) and the circular tube (15). A one-way valve is installed in the inner cavity of the reflux hole (18). A baffle (11) is provided on the side of the rotating plate (10) away from the multi-way valve body (1), and the baffle (11) is fixedly installed with the inner cavity of the air inlet pipe (2); A top plate (19) is arranged above the pressure measuring tube (3), the top plate (19) and the pressure measuring tube (3) are fixedly mounted, a nozzle (25) is fixedly mounted on the side of the indicating block (7) away from the scale plate (8), an air outlet (24) is provided at the top of the pressure measuring tube (3), the other end of the nozzle (25) is fixedly mounted on the top of the air outlet (24), the two ends of the air outlet (24) are respectively connected to the nozzle (25) and the inner cavity of the pressure measuring tube (3), and a groove (23) is provided on one side of the inner cavity of the pressure measuring tube (3); An L-shaped plate (28) is slidably mounted in the inner cavity of the slot (23), and the L-shaped plate (28) is fixedly mounted to the top of the piston plate (4); a slide groove (26) is provided on the bottom wall of the inner cavity of the slot (23), and a movable plate (27) is sealingly slidably mounted in the inner cavity of the slide groove (26), and the top of the movable plate (27) is fixedly mounted to the L-shaped plate (28); A vent (29) is provided on one side wall of the pressure measuring tube (3), and the vent (29) is connected to the inner cavity of the pressure measuring tube (3), the inner cavity of the slide groove (26) and the outside, and a through hole (30) adapted to the vent (29) is provided on the movable plate (27).

2. A multi-way valve pressure detection mechanism according to claim 1, characterized in that: A telescopic rod (20) is fixedly mounted on one side of the bottom of the top plate (19), a contact block (21) is fixedly mounted on the bottom end of the telescopic rod (20) and the top end of the indicator block (7), an alarm (22) is fixedly mounted on one side of the top of the top plate (19), two groups of the contact blocks (21) and the alarm (22) are connected in series, and the output end of the nozzle (25) faces the top of the contact block (21) at the lower side.

3. A multi-way valve pressure detection mechanism according to claim 2, characterized in that: The distance between the bottom of the piston plate (4) and the bottom wall of the inner cavity of the slot (23) is smaller than the distance between the two groups of contact blocks (21).

4. A multi-way valve pressure detection mechanism according to claim 1, characterized in that: The pipe between the nozzle (25) and the top end of the air outlet (24) is retractable.

5. A multi-way valve pressure detection mechanism according to claim 1, characterized in that: A roller (13) is rollingly mounted on the side of the indicating block (7) that contacts the scale plate (8).

6. A multi-way valve pressure detection mechanism according to claim 1, characterized in that: The top plate (19) is provided with a through opening (14) adapted to the spray head (25).

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