A leak-proof gas mass flow controller

Abstract

This invention discloses a gas mass flow controller to prevent leakage, comprising a housing, a controller body bolted to one inner wall of the housing, a connecting pipe fixed inside the housing on one side of the controller body, the connecting pipe being connected to the gas inlet of the controller body via a pipeline, a ball cavity inside the connecting pipe containing a valve ball with a through hole, a mounting shell fixed to the top of the connecting pipe, and a worm gear connected between the inner walls of the mounting shell via bearings. This invention uses sensors to monitor hazardous gases, enabling the controller module to control a motor to operate when a hazardous gas leak occurs inside the controller body, thereby causing the valve ball to cut off the hazardous gas flow and prevent further leakage.

Description

Technical Field

[0001] This invention relates to the field of gas mass flow controller technology, and more specifically to a gas mass flow controller that prevents leakage. Background Technology

[0002] A gas mass flow controller is a device that controls the mass flow rate of gas. Based on the Coriolis force, the gas mass flow controller has two parallel T-shaped vibrating tubes inside. A drive coil is installed in the middle, and vibration pickup coils are installed at both ends. When the excitation voltage provided by the transmitter is applied to the drive coil, the vibrating tubes reciprocate periodically. When the fluid medium in the industrial process flows through the vibrating tubes of the sensor, a Coriolis force effect is generated on the vibrating tubes, causing the two vibrating tubes to torsionally vibrate. The vibration pickup coils installed at both ends of the vibrating tubes will generate two sets of signals with different phases. The difference between these two signals is proportional to the mass flow rate of the fluid flowing through the sensor, thereby enabling the control of the mass and flow rate of the gas.

[0003] Chinese Patent No. 201010544587.4 discloses a novel normally open valve gas mass flow controller, comprising a metering part, a control part, and a regulating valve. The regulating valve is normally open and includes a normally open valve assembly. The normally open valve assembly comprises a valve body assembly, an outer coil sleeved on the valve body assembly, a valve core assembly within the inner cavity of the valve body assembly, a valve port at the lower opening of the inner cavity of the valve body assembly, a magnetic seat between the valve port and the valve core assembly, and a guide sleeve between the valve core assembly and the inner cavity of the valve body assembly.

[0004] Gas mass flow controllers may experience gas leaks during operation. If the leaked gas is a hazardous flammable gas, it could lead to a major safety accident. Therefore, there is an urgent need to design a gas mass flow controller that prevents leaks to address this problem. Summary of the Invention

[0005] The purpose of this invention is to provide a gas mass flow controller that prevents leakage, thereby overcoming the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A leak-proof gas mass flow controller includes a housing. A controller body is bolted to one inner wall of the housing. A connecting pipe fixed inside the housing is disposed on one side of the controller body. The connecting pipe is connected to the air inlet of the controller body via a pipe. A ball cavity is disposed inside the connecting pipe, and a valve ball is disposed inside the ball cavity. A through hole is disposed inside the valve ball. A mounting shell is fixed to the top of the connecting pipe. A worm gear is connected between the two inner walls of the mounting shell via bearings. A rotating shaft is connected to the bottom inner wall of the mounting shell via bearings. A worm wheel is welded to the top of the rotating shaft, and the worm gear meshes with the worm wheel. A motor is bolted to one outer wall of the mounting shell. One end of the output shaft of the motor is connected to the worm gear via a key. The bottom end of the rotating shaft extends into the interior of the connecting pipe and is welded to the valve ball. A control module is fixed to one inner wall of the housing. A sensor is bolted to one inner wall of the housing. The sensor and the motor are electrically connected to the control module via wires.

[0007] Furthermore, a second pipe is inserted into one side of the outer wall of the housing, one end of which is connected to the air outlet of the controller body, and a first pipe is inserted into the other side of the outer wall of the housing.

[0008] Furthermore, the connecting pipe has a connecting ring threaded inside, and a claw is integrally formed on one side of the connecting ring. The fitting is inserted into the connecting ring. The connecting pipe has a tapered surface that matches the claw inside. The connecting pipe has a sealing groove inside, a sealing ring inside the sealing groove, and a ring spring inside the sealing ring. The fitting is inserted into the sealing ring, and a sealing gasket is provided inside the connecting pipe.

[0009] Furthermore, an alarm is bolted to the top outer wall of the housing, and the alarm is electrically connected to the control module via wires.

[0010] Furthermore, a communication module is bolted to one side of the inner wall of the housing, and the communication module is electrically connected to the controller body via a wire.

[0011] Furthermore, an oil inlet is welded to the top outer wall of the mounting housing, and a sealing cap is threadedly connected to the top of the oil inlet. A light-transmitting plate is provided on one side outer wall of the mounting housing.

[0012] Furthermore, a rocker arm is welded to the outer wall of the rotating shaft, and a stop bar is welded to the bottom inner wall of the mounting housing.

[0013] Furthermore, a hinged door is connected to one side of the outer wall of the housing, and an observation window is provided on one side of the outer wall of the door.

[0014] Furthermore, a magnet is embedded in one side of the outer wall of the switch door, and a magnet is embedded in one side of the outer wall of the housing.

[0015] Furthermore, a mounting plate is welded to one side of the outer wall of the housing, and the outer wall of the mounting plate has mounting holes.

[0016] In the above technical solution, the gas mass flow controller that prevents leakage provided by the present invention has the following advantages: (1) The present invention monitors dangerous gases through sensors, so that when dangerous gas leaks inside the controller body, the motor can be controlled by the control module to work, thereby causing the valve ball to cut off the dangerous gas and prevent the dangerous gas from continuing to leak.

[0017] (2) The present invention controls the alarm to issue an alarm through the control module and sends alarm information to the staff through the communication module, so that the staff can take emergency measures at the first time, and thus the dangerous gas leak can be dealt with in a timely manner.

[0018] (3) When the connecting ring and the connecting pipe are connected by threads, the claw can clamp and fix the pipe by the extrusion of the conical surface, so that the connection process of the pipe is convenient and stable when the pipe is connected to the connecting pipe, and prevents the pipe from separating from the connecting pipe.

[0019] (4) The present invention seals the pipe and the connecting pipe with a sealing ring, and increases the force between the sealing ring and the pipe with a ring spring. Then, the end of the pipe and the connecting pipe are sealed with a sealing gasket, so that the sealing effect between the pipe and the connecting pipe is good, thereby reducing the probability of dangerous gas leakage. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a gas mass flow controller for preventing leakage according to the present invention.

[0022] Figure 2 This is a schematic diagram of the housing structure provided for an embodiment of a gas mass flow controller that prevents leakage according to the present invention.

[0023] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe provided in an embodiment of a gas mass flow controller for preventing leakage according to the present invention.

[0024] Figure 4 This is an enlarged structural diagram of point A provided in an embodiment of a gas mass flow controller for preventing leakage according to the present invention.

[0025] Figure 5 This is an enlarged structural diagram at point B, provided for an embodiment of a gas mass flow controller that prevents leakage according to the present invention.

[0026] Figure 6 This is a schematic diagram of a ring spring structure provided for an embodiment of a gas mass flow controller that prevents leakage according to the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Housing; 2. Controller body; 3. Pipe fitting one; 4. Pipe fitting two; 5. Connecting pipe; 6. Sensor; 7. Control module; 8. Alarm; 9. Ball cavity; 10. Valve ball; 11. Through hole; 12. Mounting shell; 13. Worm gear; 14. Rotating shaft; 15. Worm wheel; 16. Oil inlet; 17. Sealing cover; 18. Light-transmitting plate; 19. Motor; 20. Connecting ring; 21. Claw; 22. Conical surface; 23. Sealing gasket; 24. Sealing groove; 25. Sealing ring; 26. Ring spring; 27. Opening and closing door; 28. Observation window; 29. ​​Magnet one; 30. Magnet two; 31. Communication module; 32. Mounting plate; 33. Mounting hole; 34. Stop lever; 35. Swing lever. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-6 As shown in the figure, an embodiment of the present invention provides a gas mass flow controller to prevent leakage, including a housing 1. A controller body 2 is bolted to one inner wall of the housing 1. A connecting pipe 5 is fixed inside the housing 1 on one side of the controller body 2. The connecting pipe 5 is connected to the air inlet of the controller body 2 through a pipe. A ball cavity 9 is provided inside the connecting pipe 5. A valve ball 10 is provided inside the ball cavity 9. A through hole 11 is provided inside the valve ball 10. A mounting shell 12 is fixed to the top of the connecting pipe 5. A volute is connected between the two inner walls of the mounting shell 12 through a bearing. The bottom inner wall of the mounting housing 12 is connected to the rod 13 via a bearing and a rotating shaft 14. A worm gear 15 is welded to the top of the rotating shaft 14, and the worm 13 meshes with the worm gear 15. A motor 19 is bolted to one side of the outer wall of the mounting housing 12. One end of the output shaft of the motor 19 is connected to the worm 13 via a key. The bottom end of the rotating shaft 14 extends into the interior of the connecting pipe 5 and is welded to the valve ball 10. A control module 7 is fixed to one side of the inner wall of the housing 1. A sensor 6 is bolted to one side of the inner wall of the housing 1. The sensor 6 and the motor 19 are electrically connected to the control module 7 via wires.

[0030] Specifically, in this embodiment, the device includes a housing 1. A controller body 2 is bolted to one inner wall of the housing 1. The controller body 2 is a prior art gas mass flow controller. A connecting pipe 5 fixed inside the housing 1 is provided on one side of the controller body 2. The connecting pipe 5 is connected to the air inlet of the controller body 2 through a pipe, allowing hazardous gas to enter the interior of the controller body 2 from inside the connecting pipe 5. A ball cavity 9 is provided inside the connecting pipe 5, and a valve ball 10 is provided inside the ball cavity 9. A through hole 11 is provided inside the valve ball 10 for gas flow. A mounting shell 12 is fixed to the top of the connecting pipe 5. The inner walls of the mounting shell 12 are... A worm gear 13 is connected to the mounting housing 12 via bearings. A rotating shaft 14 is connected to the bottom inner wall of the mounting housing 12 via bearings. A worm wheel 15 is welded to the top of the rotating shaft 14. The worm gear 13 meshes with the worm wheel 15, so that when the worm gear 13 rotates, it can drive the worm wheel 15 to rotate. A motor 19 is bolted to one side outer wall of the mounting housing 12. One end of the output shaft of the motor 19 is connected to the worm gear 13 via a key, so that the motor 19 drives the worm gear 13 to rotate. The bottom end of the rotating shaft 14 extends into the interior of the connecting pipe 5 and is welded to the valve ball 10, so that the worm wheel 15 drives the rotating shaft 14 and the valve ball 10 to rotate. When the central axis of the through hole 11 on the valve ball 10 is aligned with the central axis of the connecting pipe 5, the rotation is complete. When the gas leaks, it can enter the controller body 2 through the through hole 11. When the central axis of the through hole 11 is perpendicular to the central axis of the connecting pipe 5, the inner wall of the ball cavity 9 inside the through hole 11 is blocked, preventing the gas from entering the controller body 2. A control module 7 is fixed to one inner wall of the housing 1, and a sensor 6 is bolted to one inner wall of the housing 1. The sensor 6 detects the gas being transported. The sensor 6 and the motor 19 are electrically connected to the control module 7 through wires. When the sensor 6 detects a gas leak, it transmits an electrical signal to the control module 7, causing the control module 7 to control the motor 19 to work. An alarm 8 is bolted to the top outer wall. The alarm 8 is an audible and visual alarm. The alarm 8 is electrically connected to the control module 7 via a wire, so that the alarm 8 will sound an audible and visual alarm when a gas leak occurs. A communication module 31 is bolted to one side inner wall of the housing 1. The communication module 31 can send alarm information to the staff's mobile terminal. The communication module 31 is electrically connected to the controller body 2 via a wire. The control module 7 controls the alarm 8 to sound an alarm and sends alarm information to the staff through the communication module 31, so that the staff can take emergency measures as soon as possible, and thus deal with the dangerous gas leak in a timely manner.

[0031] The present invention provides a gas mass flow controller to prevent leakage. The present invention monitors hazardous gases through sensor 6, so that when hazardous gas leakage occurs inside the controller body 2, the control module 7 can control the motor 19 to work, thereby causing the valve ball 10 to cut off the hazardous gas and prevent the hazardous gas from continuing to leak.

[0032] In one embodiment of the present invention, a second pipe 4 is inserted into one side of the outer wall of the housing 1. One end of the second pipe 4 is connected to the air outlet of the controller body 2, so that the gas entering the controller body 2 flows out through the second pipe 4. A first pipe 3 is inserted into the other side of the outer wall of the housing 1, and the gas enters the controller body 2 through the first pipe 3. A connecting ring 20 is threadedly connected to the inside of the connecting pipe 5. A claw 21 is integrally formed on one side of the connecting ring 20. The claw 21 can undergo elastic deformation when subjected to force, thereby causing multiple claws 21 to move closer together. The first pipe 3 is inserted into the inside of the connecting ring 20. The inside of the connecting pipe 5 is provided with a conical surface 22 adapted to the claw 21. When the connecting ring 20 is threadedly connected to the connecting pipe 5, the claw 21 can be squeezed by the conical surface 22. The clamping device secures and fixes fitting 3, ensuring a convenient and stable connection when it is connected to connecting pipe 5, preventing detachment between fitting 3 and connecting pipe 5. Connecting pipe 5 has an internal sealing groove 24, an internal sealing ring 25, and an internal annular spring 26. Fitting 3 is inserted into the internal sealing ring 25, and a sealing gasket 23 is located inside connecting pipe 5. The sealing ring 25 seals fitting 3 to connecting pipe 5, and the annular spring 26 increases the force between the sealing ring 25 and fitting 3. The sealing gasket 23 then seals the end of fitting 3 to connecting pipe 5, resulting in a good seal and reducing the chance of hazardous gas leakage.

[0033] In another embodiment of the present invention, an oil inlet 16 is welded to the top outer wall of the mounting shell 12, and a sealing cap 17 is threadedly connected to the top of the oil inlet 16. A light-transmitting plate 18 is provided on one side outer wall of the mounting shell 12. Lubricating oil can be added into the interior of the mounting shell 12 through the oil inlet 16, so that the lubricating oil can lubricate the meshing transmission of the worm gear 13 and the worm wheel 15. A rocker arm 35 is welded to the outer wall of the rotating shaft 14, and a stop bar 34 is welded to the bottom inner wall of the mounting shell 12. There are two stop bars 34, and the angle formed by the two stop bars 34 and the rotating shaft 14 is 90 degrees, so that the stop bar 34 can limit the rocker arm 35, thereby making the valve ball 10 rotate at an angle of 90 degrees.

[0034] In another embodiment of the present invention, a hinged door 27 is connected to one outer wall of the housing 1, and an observation window 28 is provided on one outer wall of the door 27, which facilitates observation of the interior of the housing 1. In another embodiment of the present invention, a magnet 29 is embedded in one side of the outer wall of the switch door 27, and a magnet 30 is embedded in one side of the outer wall of the housing 1. The magnet 30 and the magnet 29 are attracted and fixed together, making it easier to open the switch door 27. A mounting plate 32 is welded to one side of the outer wall of the housing 1, and a mounting hole 33 is opened on the mounting outer wall. The mounting hole 33 is used to facilitate the bolt installation of the housing 1.

[0035] Working principle: During use, the sealing cover 17 is rotated to open the oil inlet 16, allowing lubricating oil to be added into the mounting housing 12 through the oil inlet 16. Then, the sealing cover 17 and the oil inlet 16 are threaded together. When connecting fitting 3 to the connecting pipe 5, fitting 3 is inserted into the connecting ring 20 and then into the connecting pipe 5. The connecting ring 20 and the connecting pipe 5 are then threaded together, causing the conical surface 22 to press against the jaws 21, clamping and fixing fitting 3, thus securing fitting 3 to the connecting pipe 5. Fitting 4 is connected to the inlet of the controller body 2 and the connecting pipe 5 in the same way. The outlet of the controller body 2 is then connected to fitting 4. When the controller body 2 is working... When a leak occurs, sensor 6 detects the leaking hazardous gas. When sensor 6 detects the leaking hazardous gas, it transmits an electrical signal to control module 7. Control module 7 then controls motor 19 to rotate, causing motor 19 to drive worm gear 13 to rotate. The rotation of worm gear 13 drives worm wheel 15 to rotate, which in turn drives shaft 14 and valve ball 10 to rotate. This causes the through hole 11 on valve ball 10 to be blocked by the inner wall of ball cavity 9, preventing hazardous gas from entering the controller body 2 and avoiding further leakage. When control module 7 receives the electrical signal from sensor 6, it controls alarm 8 to sound an alarm and sends alarm information to staff via communication module 31, enabling staff to take immediate emergency measures.

[0036] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gas mass flow controller to prevent leakage, comprising a housing (1), characterized in that, A controller body (2) is bolted to one side of the inner wall of the housing (1). A connecting pipe (5) is fixed inside the housing (1) on one side of the controller body (2). The connecting pipe (5) is connected to the air inlet of the controller body (2) through a pipe. A ball cavity (9) is provided inside the connecting pipe (5). A valve ball (10) is provided inside the ball cavity (9). A through hole (11) is provided inside the valve ball (10). A mounting shell (12) is fixed to the top of the connecting pipe (5). The inner walls of the two sides of the mounting shell (12) are connected by bearings. There is a worm gear (13). The bottom inner wall of the mounting housing (12) is connected to a rotating shaft (14) via a bearing. A worm wheel (15) is welded to the top of the rotating shaft (14). The worm gear (13) meshes with the worm wheel (15). A motor (19) is bolted to one side outer wall of the mounting housing (12). One end of the output shaft of the motor (19) is connected to the worm gear (13) via a key. The bottom end of the rotating shaft (14) extends into the interior of the connecting pipe (5) and is welded to the valve ball (10). A control module (7) is fixed to one side inner wall of the housing (1). A sensor (6) is bolted to the inner wall. The sensor (6) and the motor (19) are electrically connected to the control module (7) via wires. A second pipe (4) is inserted into one side of the outer wall of the housing (1). One end of the second pipe (4) is connected to the air outlet of the controller body (2). A first pipe (3) is inserted into the other side of the outer wall of the housing (1). A connecting ring (20) is threaded into the inside of the connecting pipe (5). A claw (21) is integrally formed on one side of the connecting ring (20). The first pipe (3) is inserted into the inside of the connecting ring (20). The connecting pipe (5) has a tapered surface (22) that matches the claw (21) inside. The connecting pipe (5) has a sealing groove (24) inside. The sealing groove (24) has a sealing ring (25) inside. The sealing ring (25) has a ring spring (26) inside. The fitting (3) is inserted into the sealing ring (25). The connecting pipe (5) has a sealing gasket (23) inside. The top outer wall of the housing (1) is connected to an alarm (8) by bolts. The alarm (8) is electrically connected to the control module (7) by wires.

2. A gas mass flow controller for preventing leakage according to claim 1, characterized in that, A communication module (31) is bolted to one side of the inner wall of the housing (1), and the communication module (31) is electrically connected to the controller body (2) via a wire.

3. A gas mass flow controller for preventing leakage according to claim 1, characterized in that, An oil inlet (16) is welded to the top outer wall of the mounting shell (12), and a sealing cap (17) is threaded to the top of the oil inlet (16). A light-transmitting plate (18) is provided on one side outer wall of the mounting shell (12).

4. A gas mass flow controller for preventing leakage according to claim 1, characterized in that, A swing arm (35) is welded to the outer wall of the rotating shaft (14), and a stop bar (34) is welded to the bottom inner wall of the mounting shell (12).

5. A gas mass flow controller for preventing leakage according to claim 1, characterized in that, One side of the outer wall of the housing (1) is connected to a switch door (27) via a hinge, and one side of the outer wall of the switch door (27) is provided with an observation window (28).

6. A gas mass flow controller for preventing leakage according to claim 5, characterized in that, A magnet (29) is embedded in one side of the outer wall of the switch door (27), and a magnet (30) is embedded in one side of the outer wall of the housing (1).

7. A gas mass flow controller for preventing leakage according to claim 1, characterized in that, A mounting plate (32) is welded to one side of the outer wall of the housing (1), and the outer wall of the mounting plate has mounting holes (33).

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