Automatically-controlled gas safety valve

Abstract

The utility model relates to an automatic control gas safety valve which comprises a valve body, a gas inlet and a gas outlet which are arranged at one end of the valve body, and a measuring cavity and a control cavity which are arranged in the valve body, and a connecting channel is arranged between the control cavity and the measuring cavity. A detection unit used for detecting the pressure of fuel gas entering the valve body is arranged in the measuring cavity. The control cavity at least internally comprises a rubber diaphragm used for closing or opening the connecting channel, and a driving device is fixedly arranged on the valve body and fixedly connected with the interior of the valve body and the rubber diaphragm. The device further comprises a microprocessor, the microprocessor is in communication connection with the detection unit, and the microprocessor compares received pressure data with a set threshold value and drives the rubber diaphragm to open or close the connecting channel through the driving device according to the comparison result. Compared with an existing mechanical valve, the detection precision is more accurate, and automatic control can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas valves, in particular to an automatic control gas safety valve. BACKGROUND

[0002] The gas self-closing valve is usually installed on the indoor gas pipeline, and has the functions of automatic closing of gas overpressure, automatic closing of gas underpressure, automatic closing of gas overcurrent, etc. The existing mechanical self-closing valve can trigger the safety closing function only when the pressure difference of the gas flowing through the valve reaches a sufficient threshold value. Taking a self-closing valve with a rated flow of 0.6 m 3 / h as an example, the differential pressure trigger closing mode requires a leakage gas flow of about 1.2 m 3 / h to reach the threshold value for judging leakage, i.e. when the leakage is below 1.2 m 3 / h, the mechanical self-closing valve will not close the valve for leakage protection. The existing mechanical products have the following defects: no micro-leakage protection function, and cannot upload the use data and realize automatic control. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the defects of the prior art, the main purpose of the present application is to provide an automatic control gas safety valve which can improve the detection accuracy and realize automatic control of valve opening and closing.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme, an automatic control gas safety valve, including valve body, air inlet and air outlet located at one end of valve body, still including the measuring cavity and control cavity arranged in valve body, control cavity and measuring cavity pass through connecting channel between them;

[0005] The measuring cavity is provided with a detection unit for detecting the pressure of the gas entering the valve body.

[0006] The control cavity includes at least a rubber diaphragm for closing or opening the connecting channel, and a driving device is fixedly arranged on the valve body, and the driving end of the driving device extends into the valve body and is fixedly connected with the rubber diaphragm.

[0007] The valve body includes a microprocessor in communication connection with the driving device, and the microprocessor is in communication connection with the detection unit, the detection unit sends the detected gas pressure data in the valve body to the microprocessor, the microprocessor compares the received pressure data with the set threshold value, and drives the rubber diaphragm to open or close the connecting channel according to the comparison result through the driving device.

[0008] Preferably, a base is fixedly arranged on the valve body, and the driving device is located in the base.

[0009] The driving device comprises a screw rod rotatably connected to the base, a lower part of the screw rod extending into a sliding cavity provided in the base and threadedly connected with a transmission nut provided in the sliding cavity, and the transmission nut being slidably connected to the inner wall of the sliding cavity; a lower end of the transmission nut extending out of the sliding cavity and being fixedly connected with the rubber diaphragm.

[0010] The driving device further comprises a driving part provided above the base and used for driving the screw rod to rotate.

[0011] Preferably, the driving part comprises a driving motor fixedly provided in the base, a driving gear fixedly connected to the driving motor, the driving gear being engaged with an intermediate gear rotatably provided in the base, and a driven gear fixedly connected to an upper end of the screw rod and engaged with the intermediate gear.

[0012] Preferably, an upper part of the screw rod is fixedly connected with a manual knob used for manually driving the screw rod to rotate.

[0013] Preferably, the detection unit comprises two first temperature and pressure sensors and two second temperature and pressure sensors arranged back to back.

[0014] Compared with the prior art, the automatic control gas safety valve has the following advantages:

[0015] In the automatic control gas safety valve, the detection unit provided in the cavity detects the pressure of the gas entering the cavity, and the detection is completed by the detection unit, so that accurate detection can be completed. After the detection is completed, the detected data is sent to the microprocessor, and the microprocessor compares the detected data with the set threshold pressure data. When the detected pressure data is greater than the set first threshold value or smaller than the set second threshold value, it is judged that the pressure is over or under, and then the microprocessor controls the driving device to drive the rubber diaphragm to complete the closing of the valve body. Compared with the prior art, the detection accuracy is higher, and automatic control can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a cross-sectional structure schematic view of the automatic control gas safety valve in the utility model;

[0017] Figure 2 is a structure schematic view of the detection unit in the embodiment of the utility model;

[0018] Figure 3 is a structure schematic view of the rectifier device in the embodiment of the utility model;

[0019] Figure 4 is an axial view of the automatic control gas safety valve in the embodiment of the utility model;

[0020] Figure 5The utility model discloses a schematic diagram of the gas detected by the detecting unit in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] The utility model will be further explained in connection with the drawings and embodiments.

[0022] Embodiment 1:

[0023] As shown in Figure 1 and Figure 4 The embodiment provides an automatic control gas safety valve, including valve body 1, the gas inlet 101 and the gas outlet 102 at one end of valve body 1, still including the measurement cavity 5 and control cavity 3 arranged in valve body 1, and the control cavity 3 is connected with the measurement cavity 5 through connecting channel 8;The measurement cavity 5 in the embodiment is used for detecting the pressure of the gas entering into valve body 1, and the connecting channel 8 in the embodiment connects the control cavity 3 and the measurement cavity 5, and the opening or closing function of the whole valve is controlled by closing or opening the connecting channel 8;In an embodiment, the filter device 20 is further arranged in the gas inlet 101 and the gas outlet 102, to prevent foreign matters in the gas from entering into valve body 1 and causing damage to valve body 1;

[0024] The measurement cavity 5 is provided with the detecting unit 6 for detecting the gas flow size entering into valve body 1;

[0025] In the embodiment, the measurement cavity 5 is provided with the detecting unit 6 for detecting the gas flow size entering into valve body 1;The detecting unit 6 in the embodiment can be a pressure detection sensor for detecting the pressure inside valve body 1, and the pressure detection sensor sends the detected pressure data to the microprocessor, specifically, a PCB board is arranged in valve body 1, the microprocessor is fixedly installed on the PCB board, and the detecting unit 6 is communicatively connected with the PCB board to realize the connection between the detecting unit 6 and the microprocessor;

[0026] Meanwhile, the control cavity 3 at least includes the rubber diaphragm 9 for closing or opening the connecting channel 8, the valve body 1 is fixedly provided with a driving device, and the driving end of the driving device extends into valve body 1 and is fixedly connected with the rubber diaphragm 9;

[0027] Meanwhile, the PCB board is electrically connected with the driving device. When the pressure flow entering the valve body 1 detected by the detection unit 6 is greater than a first threshold value or less than a second threshold value, the microprocessor controls the driving device to drive the rubber diaphragm 9 to close the valve. In the embodiment, the first threshold value is used to determine whether the pressure entering the valve body 1 is overpressure. When the pressure is greater than the first threshold value, it means that the pressure is overpressure, and then the rubber diaphragm 9 is controlled to close the valve. The second threshold value is used to determine whether the pressure entering the valve body 1 is underpressure. When the pressure is less than the second threshold value, it means that the pressure is underpressure, and then the rubber diaphragm 9 is controlled to close the valve. The first threshold value and the second threshold value in the embodiment can be set according to the specific conditions of overpressure and underpressure. The microprocessor and the pressure detection sensor in the embodiment belong to the conventional technology in the field, and will not be described in detail here.

[0028] In another embodiment, the detection unit 6 at least includes a first temperature-pressure sensor 603 and a second temperature-pressure sensor 605, and the first temperature-pressure sensor 603 and the second temperature-pressure sensor 605 are arranged back to back. The detection end of the second temperature-pressure sensor 605 is located at one end of the gas outlet 102.

[0029] Specifically, as shown in Figure 2 The detection unit 6 further includes a fixed connection part 601. The fixed connection part 601 is fixedly connected in the valve body 1 through a mounting bolt 606. The two sides of the fixed connection part 601 are fixedly connected with sensor mounting seats 602. The first temperature-pressure sensor 603 and the second temperature-pressure sensor 605 are respectively fixedly arranged on the sensor mounting seats 602. Specifically, during installation, the fixed connection part 601 is sealed and filled in the valve body 1 by using polyurethane glue, and is fixedly connected with the valve body 1 through the mounting bolt 606. At the same time of connection, the rubber pad 604 arranged between the fixed connection part 601 and the valve body 1 is used for sealing connection. Before the fixed connection part 601 is installed in the valve body, the sensor mounting seats 602 are fixedly installed on the two sides of the fixed connection part 601. During installation, the sensor mounting seats 602 can be installed by using screws or glue. After the installation of the sensor mounting seats 602 is completed, the first temperature-pressure sensor 603 and the second temperature sensor 605 are fixedly installed on the corresponding sensor mounting seats 602. Specifically, the first temperature-pressure sensor 603 and the second temperature sensor 605 are fixedly installed by using screws. The detection heads of the first temperature-pressure sensor 603 and the second temperature sensor 605 are oppositely arranged, so that one temperature-pressure sensor can positively measure pressure against the direction of gas flow, and the other temperature-pressure sensor can back measure pressure along the direction of gas flow.

[0030] After installation, the entire fixed connection 601 is fixed into the detection chamber, ensuring that the detection head of the first temperature and pressure sensor 603 faces the air inlet of the valve body 1. This ensures that the incoming gas flows in reverse to the detection head of the first temperature and pressure sensor 603, guaranteeing accurate detection. Since the first temperature and pressure sensor 603 faces the air inlet of the valve body 1, the detection head of the second temperature and pressure sensor 605 faces the air outlet of the valve body, measuring the pressure of the gas flow in the same direction. Specifically, during pressure testing, if... Figure 5 As shown, the gas entering the valve body 1 flows from left to right into the detection chamber. At this time, the first temperature and pressure sensor 603 at the inlet detects the gas pressure of the incoming gas (the detected gas pressure is the pressure directly in front, i.e., the magnitude of the frontal pressure). After detection by the first temperature and pressure sensor 603, the gas will roll over the fixed connection part 601 and move towards the outlet end of the valve body. When the gas rolls over the fixed connection part 601, the second temperature and pressure sensor 605 located on the back detects the pressure of the rolled-over gas. Since this second temperature and pressure sensor is located on the back, the detected pressure is... The pressure of the gas in the direction of its flow is measured. The pressure of the gas entering the valve body is detected by the difference between the first and second temperature and pressure sensors, which improves the accuracy of the detection. Specifically, when the flow rate of the gas entering the valve body is relatively large, the pressure detected by the first temperature and pressure sensor 603 is relatively high. Since the second temperature and pressure sensor 605 is located behind the first temperature and pressure sensor 605, due to the excessive gas flow, after passing the fixed connection part 601, it will move directly towards the outlet of the valve body. At this time, the pneumatic pressure detected by the second temperature and pressure sensor 602 is extremely small or negligible. If we ignore the pressure, then the pressure detected by the first temperature and pressure sensor 603 is basically equal to the gas pressure. When the gas flow rate entering the valve body is too low, the first temperature and pressure sensor 603 detects the front pressure entering the valve body 1. When the gas flows over the fixed connection part 601, due to the low flow rate, the gas will sink. The second temperature and pressure sensor will then detect the pressure of the sinking gas. Therefore, when assessing pressure, the difference between the pressure detected by the first and second temperature and pressure sensors can be used to provide feedback on the gas flow rate. The gas pressure at low flow rates shows that this invention utilizes gas dynamics. The smaller the gas flow rate, the larger the value detected by the second temperature and pressure sensor. This indicates that the data obtained during differential pressure measurement will be smaller, solving the problem that currently, under low pressure conditions, a single differential pressure sensor cannot accurately detect the gas pressure (i.e., when the internal pressure change is relatively small, the values ​​detected by a single differential pressure sensor are relatively close and cannot be distinguished, leading to an inability to close the valve in time under overflow conditions). This invention improves the ability to provide technical feedback under low pressure conditions.

[0031] In the embodiment, as shown in Figure 1 The control cavity 3 comprises at least a rubber diaphragm 9 for closing or opening the connecting channel 8, which can move up and down in the control cavity to open and close the connecting channel 8, thereby opening and closing the entire safety valve. In order to control the rubber diaphragm 9, a driving device is fixed on the valve body 1, and the driving end of the driving device extends into the valve body 1 and is fixedly connected with the rubber diaphragm 9. The driving device drives the rubber diaphragm 9 to open or close the connecting channel 8.

[0032] In actual work, the first temperature and pressure sensor 603 is used to detect the front pressure and temperature data of the gas entering the valve body 1 (i.e. the pressure of the gas in the reverse flow direction), and the second temperature and pressure sensor 605 is used to detect the back pressure and temperature data of the gas entering the valve body 1 (i.e. the pressure of the gas in the forward flow direction after turning over the fixed connecting part 601). The difference between the pressure and temperature values detected by the first temperature and pressure sensor 603 and the pressure and temperature values detected by the second temperature and pressure sensor 605 is used as the basis for determining whether the gas in the valve body flows or not and the flow speed. According to the set overcurrent and timing values, the driving device controls the rubber diaphragm to close the connecting channel, thereby realizing the overcurrent and timing automatic closing function of the gas safety valve. The difference between the pressure value detected by the second temperature and pressure sensor 605 and the pressure value detected by the first temperature and pressure sensor is the real-time relative pressure of the gas in the valve body, and after temperature compensation, according to the set overpressure and underpressure values, the driving device can accurately control the rubber diaphragm to close the connecting channel, thereby realizing the overpressure and underpressure automatic closing function of the gas safety valve.

[0033] Embodiment 2

[0034] On the basis of embodiment 1, as shown in Figure 1 and Figure 4 A base 11 is fixed on the valve body 1, and the base 11 is screw-fixedly connected with the valve body 1, and the driving device is located in the base 11.

[0035] In one embodiment, the driving device at least comprises a screw rod 15 rotatably connected to the base 11, the lower part of the screw rod 15 extending into the sliding cavity 21 provided in the base 11 and being threadedly connected with the transmission nut 10 provided in the sliding cavity 21, and the transmission nut 10 being slidably connected with the cavity wall of the sliding cavity 21. Specifically, a through hole is provided in the base 11, the screw rod 15 is inserted into the through hole and connected by a shaft spring, so as to ensure the rotation of the screw rod 15. A plurality of sliding grooves are provided on the cavity wall of the sliding cavity 21, and the sliding grooves are arranged in an up-down manner. A sliding block matched with the sliding grooves is provided on the transmission nut 10, so as to ensure that the transmission nut can only move up and down in the sliding cavity 21 and cannot rotate relatively when matched with the screw rod 15. The rubber diaphragm 9 is fixedly installed on the bottom of the transmission nut 10 by vulcanization, and can move up and down by the driving of the transmission nut 10, so as to realize the opening and closing of the connecting channel 8. In one embodiment, the movement distance of the transmission nut 10 in the sliding cavity 21 is the same as the movement distance of the rubber diaphragm. Since the rubber diaphragm 9 is provided on the transmission nut 10, the length of the entire transmission nut 10 is greater than the movement distance of the rubber diaphragm. In another embodiment, the bottom of the transmission nut 10 is fixedly connected with a connecting rod, the connecting rod is fixedly connected with the rubber diaphragm by penetrating the lower wall of the sliding cavity, and the connecting rod is sealed when penetrating the lower wall of the sliding cavity 21, so as to ensure that the gas cannot enter the sliding cavity.

[0036] In one embodiment, the driving device further comprises a driving part provided above the base 11 and used for driving the screw rod 15 to rotate. The driving part can drive the screw rod 15 to rotate, and can drive the transmission nut 10 to move up and down in the sliding cavity 21 in the process of rotation of the screw rod 15, so as to drive the rubber diaphragm 9 to open and close the connecting channel 8.

[0037] Specific is, the drive part includes fixedly arranged in the base 11 drive motor 19, the output shaft of the drive motor 19 and speed reducer 17 shaft connection, the acceleration structure in the embodiment is micro speed reducer, the speed reducer belongs to the conventional technology in the technical field, here does not describe its detailed structure, the driving gear 18 is fixedly installed on the output shaft of the speed reducer 17;The driving gear 18 is engaged with the intermediate gear 22 rotatably arranged in the base 11, the intermediate gear 22 is fixedly connected with the upper end of the screw 15 from the driving gear 13 engagement;When setting, a motor compartment and a battery compartment are arranged in the base 11, and the motor compartment is located on one side of the screw 15, the drive motor 19 is fixedly installed in the motor compartment through screws, at the same time, in order to ensure that the driving gear 18 fixed on the drive motor 19 has enough space, the upper part of the motor compartment is stepped, which is used for the rotation of the driving gear 18, an intermediate gear installation compartment is further arranged between the motor compartment and the screw 15, the intermediate gear 22 is rotatably connected with the shaft fixedly arranged in the intermediate gear installation compartment, and the intermediate gear installation compartment is communicated with the battery compartment, so that the driving gear 18 can be engaged with the intermediate gear 22;A stepped compartment is also arranged on the upper part of the screw 15, the driving gear 13 is arranged in the stepped compartment and fixedly connected with the screw 15, and the stepped compartment is communicated with the intermediate gear installation compartment, so that the driving gear 13 can be fitted with the intermediate gear 22;In work, the drive motor 19 drives the driving gear to rotate through the speed reducer 17, the driving gear 18 drives the driving gear 13 to rotate through the intermediate gear 22, and then drives the screw 15 to rotate, so as to drive the transmission nut to move up and down, and realize the opening and closing of the connecting channel 8 by the rubber diaphragm 9.

[0038] In one embodiment, a power socket is arranged outside the motor compartment, which is electrically connected with the drive motor 19, and in use, an external power supply is used to provide power for the drive motor 19.

[0039] In another embodiment, a PCB compartment is arranged in the base, a PCB board is fixedly connected in the PCB compartment, the PCB board is fixed in the PCB compartment through bolts, a microprocessor is arranged on the PCB board, the input end of the microprocessor is in communication connection with the first temperature and pressure sensor 603 and the second temperature and pressure sensor 605, and the output end is in communication connection with the drive motor 19, the first temperature and pressure sensor 603 and the second temperature and pressure sensor 605 input the detected pressure and temperature values into the processor, the microprocessor performs difference operation on the received pressure and temperature values, and then compares the difference operation result with the set overflow and timing threshold value, if the difference value is greater than the set threshold value, the microprocessor controls the drive motor 19 to drive the screw 15 to drive the transmission nut to move downward, and then drives the rubber diaphragm 9 to close the connecting channel.

[0040] Embodiment 3

[0041] In order to ensure that the accurate detection can be completed in the state of micro pressure, and the valve can be closed in time in the state of under pressure, the rectification cavity 4 is further arranged between the control cavity 3 and the measuring cavity 5 in the valve body 1, the rectification cavity 4 is communicated with the measuring cavity 5, the rectification cavity 4 is communicated with the control cavity 3 through the connecting channel 8, the rectification device 7 is arranged in the rectification cavity 4, and the gas outlet of the rectification device 7 is opposite the detection head of the first temperature and pressure sensor 603; the gas entering the rectification cavity through the connecting channel 8 is rectified by the rectification device 7 and then detected by the first temperature and pressure sensor 603, and the dispersed gas can be concentrated for detection in the case of micro pressure by the rectification device; since the concentration degree can be improved after concentration, the detection data can be improved after detection, the gas flow data can be detected in the state of micro pressure, and the over flow state can be fed back in time during detection.

[0042] In one embodiment, as Figure 3 The rectification device 7 comprises an upper rectification cover 701 in sealing connection with the inside of the rectification cavity 4 in the valve body 1, and a lower rectification cover 702 connected with the upper rectification cover 701; during installation, the lower rectification cover 702 is in sealing connection with the inner wall of the rectification cavity 4, a sealing ring can be arranged at the connection position to achieve the purpose of sealing connection, the protrusion arranged on the upper rectification cover 701 is inserted into the annular channel 705 arranged on the upper rectification cover 702, the upper channel 708 penetrating through the upper rectification cover 701 is communicated with the lower channel 703 arranged in the lower rectification cover 702, the radius of the annular channel 705 in the embodiment is greater than the diameter of the lower channel 703, and the center lines of the upper channel 708 and the lower channel 703 are located on the same straight line after the upper rectification cover 701 is connected with the lower rectification cover 702; meanwhile, the upper rectification cover 701 and the lower rectification cover 702 are installed horizontally in the rectification cavity 4 as Figure 1 indicated, and the end of the lower channel 703 away from the upper channel 708 is opposite the detection head of the first temperature and pressure sensor 603, so that the gas pressure of the gas passing through the rectification device can be detected by the first temperature and pressure sensor 603 in the state of under pressure.

[0043] One or more connecting holes 707 are arranged in the end of the annular channel 705 close to the upper rectification cover 701 and communicated with the lower channel 703; specifically, when the end of the upper rectification cover 701 is inserted into one end of the annular channel, a seal is formed between the end of the upper rectification cover 701 and the annular channel, so that the gas in the upper channel 708 needs to enter the annular channel 705 through the connecting holes 707, and the end of the lower rectification cover 702 away from the upper rectification cover 701 is provided with a gas through hole communicated with the annular channel 705, so that the gas in the annular channel 705 can be discharged through the gas through hole;

[0044] The annular sealing chip 704 is arranged in the annular channel 705 and is connected with the annular channel 705 through the compression spring 706, which is sleeved on the outer wall of the lower channel 703, i.e., in the annular channel 705, so as to ensure that the annular sealing chip 704 can be compressed when descending, and when the annular sealing chip 704 is used for sealing, the compression spring 706 is in a compressed state and pushes the annular sealing chip 704 to seal the connecting hole 707 under the action of a reset force. The compression degree of the compression spring 706 can be adjusted according to a specific pressure threshold.

[0045] Specifically, when the pressure entering the valve body is too small during rectification, the gas entering the rectification cavity is concentrated in the upper channel 708, the pressure value is increased (the pressure value is too small, the sensor cannot detect the change degree of the pressure value, and the over-flow state is affected), and then the gas in the lower channel 703 is discharged and detected by the detection head of the first temperature and pressure sensor. This way can increase the pressure value when the pressure is too small, facilitate detection of the change of the pressure in the valve body, and more accurately judge whether the over-flow state occurs in the case of micro-pressure. When the pressure is too large, if a large amount of pressure flows into the lower channel, the safety valve pressure loss is too large, and the rated flow is too small. At this time, when the pressure is too large, the gas pressure in the connecting hole 707 is also increased, and when it is greater than the elastic force of the compression spring pushing the annular sealing chip 704, the gas in the connecting hole 707 pushes the annular sealing chip 704 to move downward, and the connecting hole 707 is opened at this time. The connecting hole 707 is in communication with the annular channel 705. Then, the gas is discharged to the outside of the rectification device through the annular channel 705. The annular channel 705 can effectively reduce the pressure of the gas discharged through the lower channel 703, so that the pressure borne by the first temperature sensor during detection is also reduced, the valve resistance is effectively reduced, and the first temperature sensor is effectively protected. Since the annular channel plays a role of pressure division, it will not affect the detection and judgment of overpressure (for example, the overpressure threshold of the first temperature sensor in the application can be completed without pressure division, and the pressure division is set to avoid damage to the first temperature sensor caused by sudden increase of the gas pressure). It can be seen that the rectification device in the embodiment can increase the pressure value in the case of micro-pressure to ensure that the under-pressure detection can be completed, and in the case of sudden increase of the gas pressure, the valve resistance can be effectively reduced, and the temperature and pressure sensor can be effectively protected.

[0046] In another embodiment, in order to facilitate the connection of the upper fairing 701 and the lower fairing 702, a protruding portion is arranged on the protruding portion of the upper fairing 701, and a ring-shaped recess is arranged in the inner portion of the ring-shaped channel 705 in the lower fairing 702, which cooperates with the ring-shaped protruding portion 709; during installation, the protruding portion of the upper fairing 702 is only required to be inserted into the ring-shaped channel 705, and when the ring-shaped protruding portion 709 enters the ring-shaped recess, the installation is completed; in order to ensure the sealing performance of the upper fairing 701 and the lower fairing 702 after being connected, a plurality of sealing rings can be arranged at the connection portion of the upper fairing and the lower fairing for sealing connection.

[0047] Embodiment 4

[0048] On the basis of embodiment 2, in order to avoid that the valve can be opened or closed in the state that the driving motor has no power supply, the upper portion of the screw rod 15 is fixedly connected with a manual knob 16 for manually driving the screw rod 15 to rotate. Specifically, a knob cavity is arranged above the base, the manual knob 16 is located in the knob cavity and connected with the upper portion of the screw rod 15 extending into the cavity, the screw rod 15 can be driven to rotate by the manual knob 16, so as to control the opening or closing of the valve; meanwhile, a cap is arranged outside the knob cavity, the cap can be threadedly connected at the cavity opening of the knob cavity, when manual control is required, the cap is removed, and the manual knob is manually rotated to realize control.

[0049] Embodiment 5

[0050] On the basis of embodiment 1, the first temperature and pressure sensor 603 and the second temperature and pressure sensor 605 arranged back to back in the detection unit 6 have a distance, specifically, the first temperature and pressure sensor 603 and the second temperature and pressure sensor 605 can be arranged back to back in close contact or can be arranged back to back with a certain distance, as long as the first temperature and pressure sensor 603 detects the pressure of the gas in the counter flow direction, and the second temperature and pressure sensor 605 detects the pressure of the gas in the flow direction.

[0051] The temperature and pressure sensor used in the embodiment can test the temperature of the gas while measuring the pressure, the detected temperature value can be transmitted to the company or the client port of the user through the wireless transmission module to realize real-time monitoring; specifically, a wireless communication module such as a 5G module can be arranged on the PCB, and the processor receives the detected temperature information and transmits it to the client through the 5G module to realize real-time detection.

[0052] The above embodiments are only illustrative of the present application and do not constitute a limitation on the protection scope of the present application, and any design identical or similar to the present application belongs to the protection scope of the present application.

Claims

1. An automatically controlled gas safety valve comprising a valve body (1), an inlet (101) and an outlet (102) at one end of the valve body (1), characterized in that, It also includes a measuring cavity (5) and a control cavity (3) arranged in the valve body (1), and the control cavity (3) is connected with the measuring cavity (5) through a connecting channel (8); The measuring cavity (5) is provided with a detection unit (6) for detecting the pressure of the gas entering the valve body (1); The control cavity (3) includes at least a rubber diaphragm (9) for closing or opening the connecting channel (8), and the valve body (1) is fixedly provided with a driving device, and the driving end of the driving device extends into the valve body (1) and is fixedly connected with the rubber diaphragm (9); The valve body (1) includes a microprocessor in communication connection with the driving device, and the microprocessor is in communication connection with the detection unit (6), the detection unit (6) sends the detected gas pressure data entering the valve body (1) to the microprocessor, the microprocessor compares the received pressure data with the set threshold value, and according to the comparison result, the rubber diaphragm (9) is driven by the driving device to open or close the connecting channel (8).

2. The automatically controlled gas safety valve according to claim 1, characterized in that The valve body (1) is fixedly provided with a base (11), and the driving device is located in the base (11); The driving device includes at least a screw rod (15) rotatably connected to the base (11), the lower part of the screw rod (15) extends into the sliding cavity (21) provided in the base (11) and is in threaded connection with the transmission nut (10) provided in the sliding cavity (21), and the transmission nut (10) is in up-down sliding connection with the inner wall of the sliding cavity (21); the lower end of the transmission nut (10) extends out of the sliding cavity (21) and is fixedly connected with the rubber diaphragm (9); The driving device further includes a driving part arranged above the base (11) and used for driving the screw rod (15) to rotate.

3. The automatically controlled gas safety valve according to claim 2, characterized in that The driving part includes a driving motor (19) fixedly arranged in the base (11), the driving motor (19) is fixedly connected with a driving gear (18), the driving gear (18) is in engagement with an intermediate gear (22) rotatably arranged in the base (11), and the intermediate gear (22) is in engagement with a driven gear (13) fixedly connected with the upper end of the screw rod (15).

4. The automatically controlled gas safety valve according to claim 2, characterized in that The upper part of the screw rod (15) is fixedly connected with a manual knob (16) used for manually driving the screw rod (15) to rotate.

5. The automatically controlled gas safety valve according to claim 1, characterized in that The detection unit (6) includes two first temperature and pressure sensors (603) and second temperature and pressure sensors (605) arranged back to back.

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