Gas flow device of critical flow venturi nozzle

Abstract

The utility model relates to the technical field of gas flow devices, and discloses a gas flow device of a critical flow venturi nozzle, which comprises a gas pump, the output end of the gas pump penetrates through and is fixedly connected with a fixed block, the outer wall of the fixed block is fixedly connected with a connecting plate, one end of the connecting plate far away from the fixed block is fixedly connected with a nozzle, and the nozzle is fixedly connected with the gas flow device. A filter screen is fixedly connected to the inner wall of the nozzle, a cleaning motor is fixedly connected to the outer wall of the fixing block, a driving gear is fixedly connected to the output end of the cleaning motor, an outer gear ring is meshed with the outer wall of the driving gear, a cleaning plate is fixedly connected to the cambered surface end of the outer gear ring, and a stirring assembly is arranged in the cleaning plate. The shifting assembly comprises a shifting block. According to the gas flow device of the critical flow venturi nozzle, foreign matter in gas is filtered out through the gas filter screen, measurement of the gas is more accurate, the cleaning motor enables the cleaning plate and the push plate to discharge the foreign matter on the filter screen, and the situation that the gas is difficult to enter due to blockage of the filter screen is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas flow device technical field, concretely is a critical flow venturi nozzle's gas flow device. BACKGROUND

[0002] Critical flow venturi nozzle is commonly known as sonic nozzle, also called critical flow nozzle. It is mainly applied to the transfer of flow standard, gas flow measurement and the limitation of maximum flow of flow system. It was originally used in aerospace industry, and now critical flow venturi nozzle is widely used in different industries such as automobile, energy and measurement.

[0003] But the existing equipment in the actual use process, when using the nozzle, it is difficult to process the input air, if there is foreign matter input, it can cause the pressure inconsistency in the nozzle, so that the detection effect of gas flow device is not accurate, in view of this, we provide a critical flow venturi nozzle's gas flow device. UTILITY MODEL CONTENT

[0004] The utility model discloses a critical flow venturi nozzle's gas flow device to solve the problem in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a critical flow venturi nozzle's gas flow device, including the air pump, the output of air pump is through and is fixedly connected with fixed block, the outer wall of fixed block is fixedly connected with connecting plate, the end of connecting plate away from fixed block is fixedly connected with spout, the inner wall of spout is fixedly connected with filter screen, the outer wall of fixed block is fixedly connected with cleaning motor, the output of cleaning motor is fixedly connected with driving gear, the outer wall of driving gear is engaged with outer gear ring, the arc surface end of outer gear ring is fixedly connected with cleaning plate, the inside of cleaning plate is provided with the stirring subassembly, the stirring subassembly includes:

[0006] Transmission gear, transmission gear is rotatably connected on the outer wall of cleaning plate, the outer wall of transmission gear is engaged with inner gear ring, the axle center of transmission gear is through cleaning plate and is fixedly connected with driving bevel gear, the outer wall of driving bevel gear is engaged with transmission bevel gear;

[0007] Reciprocal screw rod, reciprocal screw rod is fixedly connected at the axle center of transmission bevel gear, the outer wall of reciprocal screw rod is screw connected with slide, the outer wall of slide is fixedly connected with rotating seat, the inner wall of rotating seat is rotatably connected with push plate.

[0008] Preferably, the inside of the cleaning plate is provided with a converging assembly, the converging assembly comprises a clamping plate, the clamping plate is fixedly connected to one end of the push plate close to the driving gear, the outer wall of the cleaning plate is provided with a clamping groove, the outer wall of the rotating seat is fixedly connected with a baffle, the outer wall of the cleaning plate is fixedly connected with a telescopic clamping block, so that the push plate can rotate and be retracted when moving towards the outer gear ring, and the push plate rotates and is blocked by the baffle when moving away from the outer gear ring, so that the push plate can better push the foreign matters on the filter screen out of the filter screen.

[0009] Preferably, the output end of the telescopic clamping block is provided with an arc surface away from the driving gear, and the output end of the telescopic clamping block is in contact with the push plate, and the baffle is arranged on the end of the rotating seat away from the driving gear, so that the push plate rotates and is retracted when the push plate is in contact with the plane section of the telescopic clamping block when moving towards the outer gear ring, and the push plate is in contact with the arc end of the telescopic clamping block when moving away from the outer gear ring, so that the output end of the telescopic clamping block is retracted.

[0010] Preferably, the outer gear ring is rotatably connected to one end of the fixed block close to the filter screen, and the cleaning plate is attached to the filter screen, and the length of the cleaning plate is consistent with the radius of the filter screen, so that the cleaning plate can completely sweep the outer surface of the filter screen when rotating with the outer gear ring.

[0011] Preferably, the outer wall of the clamping plate is provided with a locking groove, a lock bar matched with the locking groove in size is fixedly connected to the center of the clamping groove, the length of the lock bar is smaller than the length of the clamping groove, and the lock bar is slidably connected with the inner wall of the locking groove, so that the clamping plate can be clamped into the clamping groove when the push plate is rotated and pushed by the telescopic clamping block when moving towards the outer gear ring, and the lock bar slides on the inner wall of the locking groove at this time, and the push plate is detached from the outer wall of the cleaning plate when the push plate moves away from the lock bar and the locking groove.

[0012] Preferably, a torsional spring is arranged at the connection between the push plate and the rotating seat, one end of the torsional spring is fixedly connected with the push plate, and the other end of the torsional spring is fixedly connected with the inner wall of the rotating seat, so that the push plate rotates on the rotating seat when the clamping plate is away from the clamping groove.

[0013] Preferably, a converging groove is arranged at one end of the cleaning plate close to the push plate, the size of the converging groove is consistent with the size of the push plate, and the push plate is attached to the outer wall of the filter screen, so that the push plate rotates and is attached to the inner wall of the converging groove when moving towards the outer gear ring, and the push plate can be completely retracted into the converging groove arranged on the cleaning plate, so that the push plate will not push the foreign matters on the filter screen when moving.

[0014] Compared with the prior art, the gas flow device of the critical flow Venturi nozzle has the following beneficial effects:

[0015] 1. The gas flow device of this critical flow venturi nozzle filters out foreign objects in the gas through the gas filter screen, making the gas measurement more accurate. At this time, the cleaning motor causes the drive gear to rotate and drive the outer gear ring to move the cleaning plate on the filter screen. Meanwhile, the transmission gear moves and rotates on the inner gear ring, causing the drive bevel gear to drive the transmission bevel gear to rotate the reciprocating screw. This causes the slide to drive the push plate to discharge foreign objects on the filter screen, preventing the filter screen from becoming clogged and making it difficult for gas to enter.

[0016] 2. The gas flow device of the critical flow venturi nozzle, when the push plate moves toward the outer toothed ring, is pushed and rotated by the telescopic locking block, the locking plate can be locked into the locking groove, so that the push plate will not push the foreign objects on the filter screen when it moves, and prevent the foreign objects from being pushed to the center of the filter screen. When the push plate moves away from the locking bar and locking groove, the push plate is driven by the torsion spring to extend the cleaning plate, so that when the push plate moves away from the outer toothed ring, it can better push the foreign objects on the filter screen. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 This is a schematic diagram of the toggle assembly structure of this utility model;

[0019] Figure 3 This is an enlarged structural diagram of region A of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the cleaning plate of this utility model;

[0021] Figure 5 This is a schematic diagram of the slide structure of this utility model.

[0022] In the diagram: 1. Air pump; 2. Fixing block; 3. Connecting plate; 4. Nozzle; 5. Filter screen; 6. Cleaning motor; 7. Drive gear; 8. External gear ring; 9. Cleaning plate; 10. Actuating assembly; 101. Transmission gear; 102. Internal gear ring; 103. Drive bevel gear; 104. Transmission bevel gear; 105. Reciprocating screw; 106. Slide; 107. Rotary seat; 108. Push plate; 11. Converging assembly; 111. Clamping plate; 112. Clamping slot; 113. Baffle; 114. Telescopic clamping block. Detailed Implementation

[0023] like Figures 1-5As shown, this utility model provides a technical solution: a gas flow device for a critical flow Venturi nozzle, including an air pump 1, a fixed block 2 that is connected through and fixed to the output end of the air pump 1, a connecting plate 3 that is fixedly connected to the outer wall of the fixed block 2, a nozzle 4 that is fixedly connected to the end of the connecting plate 3 away from the fixed block 2, a filter screen 5 that is fixedly connected to the inner wall of the nozzle 4, a cleaning motor 6 that is fixedly connected to the outer wall of the fixed block 2, a drive gear 7 that is fixedly connected to the output end of the cleaning motor 6, an external gear ring 8 that meshes with the outer wall of the drive gear 7, a cleaning plate 9 that is fixedly connected to the arc end of the external gear ring 8, and an actuating assembly 10 that is provided inside the cleaning plate 9. The actuating assembly 10 includes a transmission gear 101, an internal gear ring 102, a drive bevel gear 103, a transmission bevel gear 104, a reciprocating screw 105, a slide 106, a rotary seat 107, and a push plate 108.

[0024] In one embodiment of the present invention, a transmission gear 101 is rotatably connected to the outer wall of a cleaning plate 9. An internal gear ring 102 meshes with the outer wall of the transmission gear 101. The shaft of the transmission gear 101 passes through the cleaning plate 9 and is fixedly connected to a drive bevel gear 103. A transmission bevel gear 104 meshes with the outer wall of the drive bevel gear 103.

[0025] In one embodiment of this utility model, a reciprocating lead screw 105 is fixedly connected to the shaft of a transmission bevel gear 104. A slide 106 is threadedly connected to the outer wall of the reciprocating lead screw 105. A rotating seat 107 is fixedly connected to the outer wall of the slide 106. A push plate 108 is rotatably connected to the inner wall of the rotating seat 107.

[0026] In addition, the cleaning plate 9 is provided with a convergence assembly 11, which includes a retaining plate 111. The retaining plate 111 is fixedly connected to the end of the push plate 108 near the drive gear 7. The outer wall of the cleaning plate 9 is provided with a slot 112. The outer wall of the rotary seat 107 is fixedly connected with a baffle 113. The outer wall of the cleaning plate 9 is fixedly connected with a telescopic retaining block 114, so that the push plate 108 can rotate and retract when moving toward the outer gear ring 8. When the push plate 108 moves away from the outer gear ring 8, the push plate 108 rotates and is blocked by the baffle 113, so that the push plate 108 extends. This allows the push plate 108 to better push the foreign objects on the filter screen 5 to the outside of the filter screen 5, so that the gas can enter the nozzle better.

[0027] In an embodiment of this utility model, the output end of the telescopic block 114 away from the transmission gear 101 is set as an arc surface, and the output end of the telescopic block 114 contacts the push plate 108. The baffle 113 is set on the end of the rotary seat 107 away from the transmission gear 101. When the push plate 108 moves toward the outer gear ring 8, the push plate 108 contacts the planar section of the telescopic block 114, causing the push plate 108 to rotate and retract. When the push plate 108 moves away from the outer gear ring 8, the push plate 108 contacts the arc surface end of the telescopic block 114, causing the output end of the telescopic block 114 to retract, so that the telescopic block 114 does not affect the movement of the push plate 108 on the cleaning plate 9.

[0028] In this embodiment of the utility model, the external toothed ring 8 is rotatably connected to one end of the fixed block 2 near the filter screen 5, and the cleaning plate 9 is in contact with the filter screen 5. The length of the cleaning plate 9 is consistent with the radius of the filter screen 5, so that when the cleaning plate 9 rotates with the external toothed ring 8, it can completely sweep the outer surface of the filter screen 5, thereby enabling the cleaning plate 9 to more completely clean the foreign objects on the filter screen 5.

[0029] In an embodiment of this utility model, a locking groove is provided on the outer wall of the card plate 111. A locking bar matching the size of the locking groove is fixedly connected at the center of the card groove 112. The length of the locking bar is less than the length of the card groove 112. The locking bar is slidably connected to the inner wall of the locking groove. When the push plate 108 moves toward the outer toothed ring 8, the push plate 108 is pushed and rotated by the telescopic locking block 114, and the card plate 111 can be locked into the card groove 112. At this time, the locking bar slides on the inner wall of the locking groove. When the push plate 108 moves away from the locking bar and the locking groove, the push plate 108 is released from the contact with the outer wall of the cleaning plate 9. At this time, the push plate 108 extends. When the push plate 108 moves away from the outer toothed ring 8, it can better push out foreign objects on the filter screen 5.

[0030] In an embodiment of this utility model, a torsion spring is provided at the connection between the push plate 108 and the rotating seat 107. One end of the torsion spring is fixedly connected to the push plate 108, and the other end of the torsion spring is fixedly connected to the inner wall of the rotating seat 107. When the card plate 111 leaves the card slot 112, the torsion spring drives the push plate 108 to rotate on the rotating seat 107. At this time, the push plate 108 is blocked by the baffle 113, so that the push plate 108 can maintain the state of extending the cleaning plate 9, making it easier for the push plate 108 to push out foreign objects on the filter screen 5.

[0031] In an embodiment of this utility model, a converging groove is provided at one end of the cleaning plate 9 near the push plate 108. The size of the converging groove is the same as the size of the push plate 108, and the push plate 108 is attached to the outer wall of the filter screen 5. When the push plate 108 moves toward the outer toothed ring 8, the push plate 108 rotates and is attached to the inner wall of the converging groove, so that the push plate 108 can be completely contained in the converging groove provided on the cleaning plate 9. This prevents the push plate 108 from pushing foreign objects on the filter screen 5 when it moves, and prevents foreign objects from being pushed to the center of the filter screen 5, making it difficult for foreign objects to be discharged.

[0032] In this invention, during use, the air pump 1 blows gas from the fixed block 2 into the nozzle 4. The nozzle 4 then absorbs gas from its surroundings. The gas passes through the filter screen 5, filtering out foreign matter and making gas measurements more accurate. Simultaneously, the cleaning motor 6 rotates the drive gear 7, which in turn drives the outer gear ring 8 to move the cleaning plate 9 on the filter screen 5. At the same time, the transmission gear 101 moves and rotates on the inner gear ring 102, causing the drive bevel gear 103 to drive the transmission bevel gear 104, which in turn rotates the reciprocating screw 105. This causes the slide 106 to drive the push plate 108 to remove foreign matter from the filter screen 5. To prevent the filter screen 5 from becoming clogged and making it difficult for gas to enter, and when the push plate 108 moves toward the outer toothed ring 8, when the push plate 108 is pushed and rotated by the telescopic locking block 114, the locking plate 111 can be locked into the locking groove 112, so that the push plate 108 will not push the foreign objects on the filter screen 5 to move when it moves, and prevent the foreign objects from being pushed to the center of the filter screen 5. When the push plate 108 moves away from the locking bar and the locking groove, the push plate 108 is driven by the torsion spring to extend the cleaning plate 9, so that when the push plate 108 moves away from the outer toothed ring 8, it can better push out the foreign objects on the filter screen 5.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A gas flow device for a critical flow Venturi nozzle, comprising an air pump (1), wherein the output end of the air pump (1) is connected to a fixing block (2) through and fixedly connected thereto, characterized in that: A connecting plate (3) is fixedly connected to the outer wall of the fixed block (2). A nozzle (4) is fixedly connected to the end of the connecting plate (3) away from the fixed block (2). A filter screen (5) is fixedly connected to the inner wall of the nozzle (4). A cleaning motor (6) is fixedly connected to the outer wall of the fixed block (2). A drive gear (7) is fixedly connected to the output end of the cleaning motor (6). An external gear ring (8) meshes with the outer wall of the drive gear (7). A cleaning plate (9) is fixedly connected to the arc end of the external gear ring (8). An actuating component (10) is provided inside the cleaning plate (9). The actuating component (10) includes: A transmission gear (101) is rotatably connected to the outer wall of the cleaning plate (9). An internal gear ring (102) meshes with the outer wall of the transmission gear (101). The shaft of the transmission gear (101) passes through the cleaning plate (9) and is fixedly connected to a drive bevel gear (103). A transmission bevel gear (104) meshes with the outer wall of the drive bevel gear (103). A reciprocating lead screw (105) is fixedly connected to the shaft of a transmission bevel gear (104). A slide (106) is threadedly connected to the outer wall of the reciprocating lead screw (105). A rotating seat (107) is fixedly connected to the outer wall of the slide (106). A push plate (108) is rotatably connected to the inner wall of the rotating seat (107).

2. The gas flow device for a critical flow Venturi nozzle according to claim 1, characterized in that: The cleaning plate (9) is provided with a convergence component (11) inside. The convergence component (11) includes a clamping plate (111). The clamping plate (111) is fixedly connected to the end of the push plate (108) near the drive gear (7). The outer wall of the cleaning plate (9) is provided with a slot (112). The outer wall of the rotary seat (107) is fixedly connected with a baffle (113). The outer wall of the cleaning plate (9) is fixedly connected with a telescopic clamping block (114).

3. The gas flow device for a critical flow Venturi nozzle according to claim 2, characterized in that: The output end of the telescopic block (114) away from the transmission gear (101) is set as an arc surface, and the output end of the telescopic block (114) is in contact with the push plate (108). The baffle (113) is set on the end of the rotary seat (107) away from the transmission gear (101).

4. The gas flow device for a critical flow Venturi nozzle according to claim 1, characterized in that: The external toothed ring (8) is rotatably connected to one end of the fixed block (2) near the filter screen (5), and the cleaning plate (9) is in contact with the filter screen (5), with the length of the cleaning plate (9) being consistent with the radius of the filter screen (5).

5. The gas flow device for a critical flow Venturi nozzle according to claim 2, characterized in that: The outer wall of the card plate (111) is provided with a locking groove. A locking bar that matches the size of the locking groove is fixedly connected to the center of the card groove (112). The length of the locking bar is less than the length of the card groove (112). The locking bar is slidably connected to the inner wall of the locking groove.

6. The gas flow device for a critical flow Venturi nozzle according to claim 1, characterized in that: A torsion spring is provided at the connection between the push plate (108) and the rotating seat (107). One end of the torsion spring is fixedly connected to the push plate (108), and the other end of the torsion spring is fixedly connected to the inner wall of the rotating seat (107).

7. The gas flow device for a critical flow Venturi nozzle according to claim 1, characterized in that: The cleaning plate (9) has a converging groove at one end near the push plate (108). The size of the converging groove is the same as that of the push plate (108), and the push plate (108) is attached to the outer wall of the filter screen (5).

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