Step-by-step calculation type natural gas energy metering device and Internet of Things system

Abstract

The present invention discloses a step-by-step calculation type natural gas energy metering device, including a shell, in which a calorific value analysis and processing module, a flow comprehensive analysis and processing module and an energy calculation module are arranged; the calorific value analysis and processing module is used to calculate the unit calorific value of natural gas, and transmit the calculation result to the energy calculation module; the flow comprehensive analysis and processing module is used to obtain natural gas sensing information, calculate the standard flow information and transmit it to the energy calculation module; the energy calculation module calculates the natural gas energy according to the obtained standard flow information and the unit calorific value information of natural gas in the corresponding time period. The energy metering device of the present invention has an integrated design, and the parameters of each functional module have good matching, and the measurement is more accurate; the integrated design is conducive to improving customer procurement efficiency and improving equipment management work efficiency, and the step-by-step calculation method is adopted to reduce the calculation load of the module, effectively improve the calculation speed and efficiency, and reduce calculation failures.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas energy metering, and in particular to a step-by-step calculation type natural gas energy metering device and an Internet of Things system. Background Art

[0002] As a high-quality, efficient, clean energy and important chemical raw material, natural gas has been widely valued and given priority in all countries around the world, accounting for 35% of the energy structure. With the increasing status of natural gas as an environmentally friendly energy source, accurate, fair and impartial measurement of natural gas is an important technical work for scientific management of natural gas, which is related to the interests of many parties. At the same time, as a fuel, the actual value of natural gas should be its calorific value rather than its volume. The natural gas measurement method abroad generally adopts the energy measurement method, so it is of great significance to carry out research on natural gas energy measurement equipment.

[0003] Existing natural gas gathering and transportation stations are equipped with metering equipment, but traditional metering equipment is unable to determine the accuracy of energy metering results. After long-term use, the actual metering results of the metering equipment have large errors. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and the purpose is to provide a step-by-step calculation type natural gas energy metering device, to realize the integrated design of the natural gas energy metering device, to have good matching of parameters of each functional module and to make the metering more accurate; the integrated design is conducive to improving customer procurement efficiency and at the same time improving equipment management efficiency, and the step-by-step calculation method is adopted to reduce the calculation load of the module, effectively improve the calculation speed and efficiency, and reduce calculation failures.

[0005] The present invention is achieved through the following technical solutions:

[0006] The step-by-step calculation type natural gas energy metering device comprises a shell, wherein a calorific value analysis and processing module, a flow comprehensive analysis and processing module and an energy calculation module are arranged in the shell; the calorific value analysis and processing module is used for calculating the unit calorific value of natural gas and transmitting the calculation result to the energy calculation module; the flow comprehensive analysis and processing module is used for acquiring natural gas sensing information, calculating standard flow information and transmitting the result to the energy calculation module; the energy calculation module calculates the natural gas energy according to the acquired standard flow information and the unit calorific value information of natural gas in the corresponding time period.

[0007] Furthermore, it also includes a touch display, a flow sensor, a pressure sensor, and a temperature sensor. The flow comprehensive analysis and processing module is used to analyze and process the signals collected by the flow sensor, the pressure sensor, and the temperature sensor, calculate the natural gas operating flow, and realize the conversion to the standard flow; the touch display is respectively connected to the flow comprehensive analysis and processing module, the calorific value analysis and processing module, and the energy calculation module, and can send control instructions to the flow comprehensive analysis and processing module, the calorific value analysis and processing module, and the energy calculation module to adjust the parameters within the authority.

[0008] Furthermore, the input end of the calorific value analysis and processing module is provided with a sample gas processing system and a standard gas processing system, the input end of the sample gas processing system is also provided with a sample gas controller, the input end of the sample gas controller is also provided with a sample gas collection interface, and the input end of the standard gas processing system is also provided with a standard gas collection interface; the standard gas processing system is used to remove impurities from the collected standard gas, and the calorific value analysis and processing module calculates the calorific value of the standard gas after impurities are removed, and compares the calculation result with the standard value of the calorific value of the standard gas to realize the calibration of the calorific value analysis and processing module; the sample gas processing system is used to remove impurities from the collected natural gas, and the calorific value analysis and processing module calculates the unit calorific value of the natural gas after impurities are removed, and transmits the calculation result to the energy calculation module.

[0009] Furthermore, it also includes a communication module, which is communicatively connected with the energy calculation module to realize external communication of the step-by-step calculation type natural gas energy metering device.

[0010] Furthermore, it also includes a gas pipe that passes through the shell, and the sample gas collection interface includes a sampling tube arranged in the shell and connected to the gas pipe. An air pump connected to the sampling tube is also provided on the outer wall of the sampling tube. A fixed rod is provided in the sampling tube, and the fixed rod can be extended into the sampling tube. A first movable block and a second movable block with an outer diameter matching the inner diameter of the sampling tube are slidably provided on the fixed rod; an exhaust hole for discharging the fluid in the sampling tube is also provided on the fixed rod, and the exhaust hole can be opened when the first movable block moves toward the second movable block.

[0011] In view of the natural gas energy metering device in the prior art, when measuring the natural gas in the gas pipe, since the traditional sample gas collection interface adopts the connection between the sampling tube and the gas pipe, when it is necessary to collect the natural gas in the gas pipe, the set air pump is used to generate suction in the sampling tube, and the natural gas in the gas pipe is sucked into the sampling tube for subsequent energy analysis. However, when sampling the natural gas in different time periods, a part of the sample gas collected in the previous time period will always remain in the sampling tube, resulting in that when the natural gas in the gas pipe is collected again in the next time period, the natural gas collected in the two time periods will be mixed together, resulting in an error in measuring the energy value of the natural gas in the time period. For this reason, the present technical solution is provided with a first movable block and a second movable block in the existing sampling tube, and the first movable block and the second movable block are provided. Both can move along the axial direction of the sampling tube in the sampling tube, and fixed rods slidably connected to the first movable block and the second movable block are respectively arranged in the sampling tube, and exhaust holes for discharging the fluid in the sampling tube are also arranged on the fixed rods. When it is necessary to collect the natural gas in the gas pipe during this period, the first movable block is first moved toward the second movable block. Since the outer diameter of the first movable block is consistent with the inner diameter of the sampling tube, the first movable block can compress the natural gas remaining in the sampling tube in the previous period during the movement. At the same time, the exhaust holes on the fixed rod are in an open state. Therefore, when the first movable block compresses the natural gas remaining in the sampling tube, it can quickly discharge it into the gas pipe from the exhaust holes, thereby achieving the purpose of discharging the natural gas remaining in the sampling tube during the natural gas collection process in the previous period.

[0012] When collecting natural gas in the gas pipe, since the fixed rod is able to move along its axial direction in the sampling tube, the first movable block and the second movable block are brought together to exhaust all the natural gas remaining in the sampling tube, and then the first movable block and the second movable block located close together on the fixed rod are extended into the gas pipe together by using the fixed rod, and then the first movable block is first withdrawn into the sampling tube. In the process of the first movable block being withdrawn into the sampling tube, the negative pressure generated can suck the natural gas in the gas pipe during this period into the sampling tube, thereby realizing the rapid collection of the natural gas during this period. At the same time, after the collection of the natural gas during this period is completed, the second movable block is also withdrawn into the sampling tube, and the pipe mouth of the sampling tube is sealed, thereby ensuring that the natural gas of different periods can be accurately collected in the sampling tube, so that the energy value of the natural gas measured in each period is more accurate.

[0013] Furthermore, it also includes a first telescopic member arranged in the sampling tube, one end of the first telescopic member is connected to the inner wall of the shell, and the other end is connected to the first movable block along the axial direction of the sampling tube; the fixing rod is inserted into the first telescopic member along the axial direction of the first telescopic member.

[0014] The first telescopic member is used to drive the first movable block to move normally in the sampling tube.

[0015] Furthermore, a second telescopic member is provided inside the first telescopic member, one end of the second telescopic member is connected to the inner top surface of the first telescopic member, and the other end is connected to the fixing rod; the first telescopic member and the second telescopic member are both bellows, and are respectively connected to the pump body through air pipes.

[0016] The second telescopic member is used to drive the normal movement of the fixed rod in the sampling tube. The first telescopic member and the second telescopic member in the technical solution both adopt bellows, which are connected to the pump body arranged in the shell through an air pipe. The first telescopic member and the second telescopic member are filled with gas by the pump body. Since the bellows can expand and stretch along its axial direction after being inflated, the first telescopic member and the second telescopic member can respectively realize the adjustment of the position of the first movable block and the fixed rod in the sampling tube.

[0017] Furthermore, a channel is provided in the fixing rod, one end of the channel is connected to the exhaust hole, and the other end is connected to the side wall of the fixing rod; a connecting hole with an inner diameter matching the outer diameter of the fixing rod is provided on the second movable block, and the fixing rod is inserted into the connecting hole. A first accommodating cavity is provided on the inner wall of the connecting hole, and a first elastic member and a blocking block are provided in the first accommodating cavity. The elastic force generated by the first elastic member can push the blocking block to be inserted into the channel and block the channel.

[0018] In order to ensure that the exhaust hole close to the lower end of the fixed rod can be opened when the first telescopic member drives the first movable block to move toward the second movable block, and at the same time ensure that the exhaust hole is in a blocked state when the first movable block moves away from the second movable block, an inverted "T" structured channel is provided in the fixed rod, the upper end of the channel is connected with the exhaust hole, and the other two ends of the channel are respectively connected with the two sides of the fixed rod; when the blocking block on the inner wall of the connecting hole of the second movable block is flush with the channel, the blocking block is pushed into the channel under the action of the first elastic member to block the channel, thereby achieving the blocking of the exhaust hole.

[0019] When the first movable block moves toward the second movable block, the first movable block compresses the natural gas remaining in the sampling tube, forcing the natural gas to enter the channel through the exhaust hole and act on the blocking block in the channel. As the pressure generated by the first movable block during movement gradually increases, when the pressure is greater than the elastic force of the first elastic member, the blocking block is forced to compress the first elastic member and retract into the first accommodating chamber. At this time, the fixed rod removes the restraining force of the blocking block on it, and the second telescopic member is a bellows. When the first movable block moves in the sampling tube, the air pressure generated by the compressed natural gas can force the fixed rod to actively move toward the gas pipe, and cause the channel on the fixed rod to be misaligned with the first accommodating chamber, and finally extend the channels on both sides of the fixed rod into the gas pipe, thereby realizing the connection between the gas pipe and the exhaust hole, so that the natural gas remaining in the sampling tube can finally enter the gas pipe through the exhaust hole and the channel in turn, and discharge the gas remaining in the sampling tube in the previous period of sampling.

[0020] When the first movable block and the second movable block are brought together, the second telescopic member can pull the fixed rod back and retract. When the channel on the fixed rod retracts to be flush with the blocking block, the blocking block is reinserted into the channel under the action of the first elastic member. The channel is blocked by the blocking block, and the second movable block is re-fixed on the fixed rod to ensure that the exhaust hole is in a closed state.

[0021] Furthermore, a second accommodating cavity is provided on both sides of the inner wall of the sampling tube, and a second elastic member and a limit block are provided in the second accommodating cavity; a third accommodating cavity is provided on both sides of the second movable block, and when the third accommodating cavity on the second movable block moves to be flush with the second accommodating cavity, the elastic force generated by the second elastic member can push the limit block to be inserted into the third accommodating cavity.

[0022] In the present technical solution, when the exhaust hole needs to be connected to the gas pipe, the second movable block needs to be separated from the fixed rod, and at the same time, the second movable block needs to be fixed to the inner wall of the sampling tube, so as to ensure that the fixed rod can move smoothly on the second movable block. Therefore, a second elastic member and a limit block are provided on the inner wall of the sampling tube, and the elastic force generated by the second elastic member is used to push the limit block to be inserted into the third accommodating cavity of the second movable block, thereby realizing the fixation between the second movable block and the sampling tube.

[0023] Furthermore, a first unlocking block is provided at the end of the first movable block facing the second movable block, a notch is provided at the end of the first unlocking block facing the second movable block, a third elastic member and a second unlocking block are provided in the notch; a groove is provided at the end surface of the second movable block facing the first movable block, the first unlocking block can be inserted into the groove, and the groove is connected to the third accommodating cavity; the elastic force of the third elastic member is greater than the elastic force of the second elastic member.

[0024] When it is necessary to sample the natural gas in the gas pipe, in order to ensure that the second movable block can be smoothly separated from the sampling tube, a first unlocking block, a third elastic member and a second unlocking block are also provided on the first movable block. When the first movable block and the second movable block are close to each other, the first unlocking block on the first movable block can be inserted into the groove on the second movable block. When the first movable block and the second movable block are completely close to each other, the second unlocking block is flush with the limit block, and under the action of the third elastic member, the limit block is pushed back into the second accommodating cavity by the second unlocking block, thereby realizing the removal of the constraint of the limit block on the second movable block, so that the second movable block can smoothly move in the sampling tube with the fixed rod at this time.

[0025] Furthermore, the limiting block and the second unlocking block are both conical structures, and the cone tips of the limiting block and the second unlocking block face each other.

[0026] Since the second unlocking block needs to retract the limit block into the second accommodating cavity, when the first movable block moves back in a direction away from the second movable block, in order to ensure that the second unlocking block located in the third accommodating cavity can be smoothly moved out of the groove of the second movable block, the second unlocking block is set to a conical structure, so that in the process of the second unlocking block moving upward, the conical surface of the second unlocking block is used to force the second unlocking block to retract in the direction of the third elastic member, so that the second unlocking block can smoothly pass through the groove;

[0027] Similarly, when the first unlocking block on the first movable block is inserted into the groove, the upper surface of the second movable block acts on the conical surface of the second unlocking block, forcing the second unlocking block to compress the third elastic member, thereby being smoothly inserted into the groove.

[0028] When the fixed rod drives the second movable block and the first movable block to extend into the gas pipe together, the first movable block and the second movable block need to be retracted into the sampling tube in turn. In order to ensure that the first movable block and the second movable block can pass through the limit block smoothly, the limit block is also set to a conical structure, and the second movable block and the first movable block are used to act on the conical surface of the limit block, so that the limit block is retracted into the second accommodating cavity.

[0029] The step-by-step computing natural gas energy metering IoT system includes a user platform, a service platform, a management platform, a sensor network platform, and a perception control platform that interact in sequence;

[0030] The perception control platform is the above-mentioned natural gas energy metering device, and the perception control platform transmits the acquired perception information to the management platform through the sensor network platform;

[0031] The management platform includes an energy metering management system, which performs comprehensive analysis and processing on the received perception information, transmits user demand information to the user platform through the service platform, and issues control instructions to the perception control platform through the sensor network platform.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] 1. The present invention realizes the integrated design of the natural gas energy metering device, the parameters of each functional module are well matched, and the metering is more accurate; the integrated design is conducive to improving customer procurement efficiency and equipment management efficiency. The flow, heat and energy are calculated in a step-by-step manner by modules, which reduces the calculation load of the module, effectively improves the calculation speed and efficiency, and reduces calculation failures;

[0034] 2. When collecting natural gas in the gas pipe, the present invention uses the first telescopic member to drive the first movable block to move in the sampling pipe, and quickly discharges the natural gas remaining in the sampling pipe in the previous period from the exhaust hole on the fixed rod into the gas pipeline, and then extends the second movable block from the pipe mouth of the sampling pipe into the gas pipe, and uses the negative pressure generated when the first movable block moves back to draw the natural gas in this period into the sampling pipe, thereby ensuring that the sampling pipe can accurately collect natural gas in different periods, and thus making the energy value of the natural gas measured in each period more accurate;

[0035] 3. In the process of using the first movable block to discharge the natural gas remaining in the sampling tube, the compressed natural gas enters the channel and acts on the blocking block, forcing the blocking block to move out of the channel, so that the fixed rod can be extended into the gas pipe to connect the exhaust hole with the gas pipe, thereby achieving the purpose of quickly discharging the natural gas remaining in the sampling tube. When collecting natural gas, the set blocking block can be inserted into the channel to re-block the exhaust hole and ensure that the second movable block and the fixed rod are stably connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0037] Figure 1 It is a schematic diagram of the structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure inside the housing of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the housing of the present invention in one state;

[0040] Figure 4It is a schematic diagram of the structure of the housing of the present invention in another state;

[0041] Figure 5 For the present invention Figure 2 The structural diagram of the enlarged part A in the middle;

[0042] Figure 6 For the present invention Figure 3 The structural diagram of the enlarged part B in the middle;

[0043] Figure 7 For the present invention Figure 4 The schematic diagram of the structure after the enlargement of the middle C part;

[0044] Figure 8 For the present invention Figure 6 The structural diagram of the enlarged D part in the middle;

[0045] Fig. 9 This is a schematic diagram of the system architecture in Example 3 of the present invention.

[0046] Marks and corresponding parts names in the attached drawings:

[0047] 1-shell, 2-gas pipe, 3-sampling tube, 4-air pump, 5-first telescopic member, 7-first movable block, 8-fixing rod, 9-exhaust hole, 10-second movable block, 11-channel, 12-first elastic member, 13-blocking block, 14-groove, 15-second telescopic member, 16-second elastic member, 17-limiting block, 21-second unlocking block, 22-third elastic member, 23-first unlocking block. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0049] Example 1

[0050] like Figure 1 As shown, it also includes a shell 1, in which a flow sensor, a pressure sensor, a temperature sensor and a flow comprehensive analysis and processing module are arranged. The flow comprehensive analysis and processing module is used to analyze and process the signals collected by the flow sensor, the pressure sensor and the temperature sensor.

[0051] In order to monitor the flow, pressure and stability of the natural gas in the gas pipe in real time, a flow sensor, a pressure sensor and a temperature sensor are respectively provided in the shell 1, and the flow sensor, pressure sensor and temperature sensor are distributed in the gas pipe 2. The instantaneous flow information of the natural gas is obtained by the flow sensor and transmitted to the flow comprehensive analysis and processing module. The real-time pressure information of the natural gas is obtained by the pressure sensor and transmitted to the flow comprehensive analysis and processing module. The real-time temperature information of the natural gas is obtained by the temperature sensor and transmitted to the flow comprehensive analysis and processing module. The collected signals are analyzed and processed by the flow comprehensive analysis and processing module to determine whether the natural gas in the gas pipe 2 is in a normal state.

[0052] It also includes an energy calculation module, a communication module, and a touch display arranged in the shell 1. The energy calculation module is used to transmit and receive signals to the flow comprehensive analysis and processing module, the communication module, and the touch display; the touch display is also connected to the flow comprehensive analysis and processing module, and the communication module is connected to a gateway outside the device to realize external communication of the device.

[0053] It also includes a calorific value analysis and processing module arranged in the housing 1, the output end of the calorific value analysis and processing module is respectively connected to the touch display and the energy calculation module, the input end of the calorific value analysis and processing module is also provided with a sample gas processing system and a standard gas processing system, the input end of the sample gas processing system is provided with a sample gas controller, the input end of the sample gas controller is also provided with a sample gas collection interface, and the sample gas controller is connected to the air pump 4;

[0054] The input end of the standard gas processing system is provided with a standard gas collection interface. The touch display is electrically connected to the flow comprehensive analysis processing module, the calorific value analysis processing module, and the energy calculation module to achieve two-way communication. The touch display can obtain and display information such as the operating pressure, temperature, operating flow, standard flow, and calorific value of the natural gas; the touch display can also be operated on site to send relevant control instructions to the flow comprehensive analysis processing module, the calorific value analysis processing module, and the energy calculation module to adjust the parameters within the authority.

[0055] The standard gas enters the calorific value analysis and processing module through the standard gas collection interface and the standard gas processing system. The calorific value analysis and processing module analyzes the calorific value of the standard gas and compares the calorific value according to the standard gas calorific value.

[0056] The natural gas enters the calorific value analysis and processing module through the sample gas collection interface, the sample gas controller and the sample gas processing system in sequence, and the calorific value analysis and processing module calculates the unit calorific value of the sample gas.

[0057] The flow comprehensive analysis and processing module and the calorific value analysis and processing module respectively transmit the standard flow information and the unit calorific value calculation results of the sample gas to the energy calculation module. The above-mentioned standard flow information is that the flow comprehensive analysis and processing module calculates the operating flow based on the flow, pressure, and temperature perception information obtained, and converts it into standard flow information based on the operating flow.

[0058] The energy calculation module calculates the natural gas energy based on the acquired standard flow information and the natural gas calorific value information of the corresponding time period.

[0059] In addition, the standard gas can be collected through the standard gas collection interface and the standard gas processing system and enter the calorific value analysis and processing module. The calorific value analysis and processing module calculates the calorific value of the standard gas and compares the calculation result with the standard value of the calorific value of the standard gas to realize the calibration of the calorific value analysis and processing module.

[0060] This technical solution adopts an integrated design for collecting information such as flow, pressure and temperature, and is equipped with distributed information processing modules. The parameters of each functional module have good matching and more accurate measurement, which effectively reduces the space occupied by the device and is convenient for users to install. The integrated design is conducive to improving customer procurement efficiency and equipment management efficiency. The flow, heat and energy are calculated step by step by modules, which reduces the calculation load of the module, effectively improves the calculation speed and efficiency, and reduces calculation failures.

[0061] Example 2

[0062] like Figures 2 to 8 As shown, on the basis of Example 1, the present invention also includes a gas pipe 2 passing through the shell 1, the sample gas collection interface includes a sampling tube 3 located in the shell 1 and connected to the gas pipe 2, an outer wall of the sampling tube 3 is also provided with an air pump 4 connected to the sampling tube 3, a fixing rod 8 is provided in the sampling tube 3, the fixing rod 8 can be extended into the sampling tube 3, a first movable block 7 and a second movable block 10 whose outer diameter matches the inner diameter of the sampling tube 3 are slidably provided on the fixing rod 8; an exhaust hole 9 for discharging the fluid in the sampling tube 3 is also provided on the fixing rod 8, and when the first movable block 7 moves toward the second movable block 10, the exhaust hole 9 can be opened.

[0063] In view of the natural gas energy metering device in the prior art, when measuring the natural gas in the gas pipe, since the traditional sample gas collection interface adopts the connection between the sampling tube and the gas pipe, when it is necessary to collect the natural gas in the gas pipe, the set air pump is used to generate suction in the sampling tube, and the natural gas in the gas pipe is sucked into the sampling tube for subsequent energy analysis. However, when sampling the natural gas in different time periods, a part of the sample gas collected in the previous time period will always remain in the sampling tube, resulting in that when the natural gas in the gas pipe is collected again in the next time period, the natural gas collected in the two time periods will be mixed together, resulting in an error in measuring the energy value of the natural gas in the time period. For this reason, the technical solution is provided with a first movable block 7 and a second movable block 10 in the existing sampling tube 3, and the first movable block 7 and the second movable block 10 can be moved along the sampling tube 3 The sampling tube 3 moves axially, and a fixed rod 8 is provided in the sampling tube 3 which is slidably connected with the first movable block 7 and the second movable block 10 respectively. The fixed rod 8 is also provided with an exhaust hole 9 for discharging the fluid in the sampling tube 3. When it is necessary to collect the natural gas in the gas pipe 2 during this period, the first movable block 7 is first moved toward the second movable block 10. Since the outer diameter of the first movable block 7 is consistent with the inner diameter of the sampling tube 3, the first movable block 7 can compress the natural gas remaining in the sampling tube 3 in the previous period during the movement. At the same time, the exhaust hole 9 on the fixed rod 8 is in an open state. Therefore, when the first movable block 7 compresses the natural gas remaining in the sampling tube 3, it can quickly discharge it from the exhaust hole 9 into the gas pipe 2, thereby achieving the purpose of discharging the natural gas remaining in the sampling tube 3 during the natural gas collection process in the previous period.

[0064] When collecting the natural gas in the gas pipe 2, since the fixed rod 8 is able to move along its axial direction in the sampling tube 3, the first movable block 7 and the second movable block 10 are brought together to exhaust all the natural gas remaining in the sampling tube 3, and then the first movable block 7 and the second movable block 10 located close together on the fixed rod 8 are extended into the gas pipe 2 by using the fixed rod 8, and then the first movable block 7 is withdrawn into the sampling tube 3. In the process of the first movable block 7 being withdrawn into the sampling tube 3, the negative pressure generated can suck the natural gas in the gas pipe 2 during this period into the sampling tube 3, thereby realizing the rapid collection of the natural gas during this period. At the same time, after the collection of the natural gas during this period is completed, the second movable block 10 is also withdrawn into the sampling tube 3 to seal the pipe mouth of the sampling tube 3, thereby ensuring that the natural gas of different periods can be accurately collected in the sampling tube 3, so that the energy value of the natural gas measured in each period is more accurate.

[0065] It also includes a first telescopic member 5 arranged in the sampling tube 3, one end of the first telescopic member 5 is connected to the inner wall of the shell 1, and the other end is connected to the first movable block 7 along the axial direction of the sampling tube 3; the fixing rod 8 is inserted into the first telescopic member 5 along the axial direction of the first telescopic member 5.

[0066] The first telescopic member 5 is used to drive the first movable block 7 to move normally in the sampling tube 3 .

[0067] A second telescopic member 15 is also provided inside the first telescopic member 5. One end of the second telescopic member 15 is connected to the inner top surface of the first telescopic member 5, and the other end is connected to the fixing rod 8. The first telescopic member 5 and the second telescopic member 15 are both bellows and are connected to the pump body through air pipes respectively.

[0068] The second telescopic member 15 is used to drive the normal movement of the fixed rod 8 in the sampling tube 3. The first telescopic member 5 and the second telescopic member 15 in the technical solution both adopt bellows, which are connected to the pump body arranged in the shell through an air pipe. The first telescopic member 5 and the second telescopic member 15 are filled with gas by the pump body. Since the bellows can expand and stretch along its axial direction after being inflated, the first telescopic member 5 and the second telescopic member 15 can respectively realize the adjustment of the positions of the first movable block 7 and the fixed rod 8 in the sampling tube 3.

[0069] A channel 11 is also provided in the fixing rod 8, one end of the channel 11 is connected to the exhaust hole 9, and the other end is connected to the side wall of the fixing rod 8; a connecting hole with an inner diameter matching the outer diameter of the fixing rod 8 is provided on the second movable block 10, and the fixing rod 8 is inserted into the connecting hole. A first accommodating cavity is provided on the inner wall of the connecting hole, and a first elastic member 12 and a blocking block 13 are provided in the first accommodating cavity. The elastic force generated by the first elastic member 12 can push the blocking block 13 to be inserted into the channel 11 and block the channel 11.

[0070] In order to ensure that when the first telescopic member 5 drives the first movable block 7 to move toward the second movable block 10, the exhaust hole 9 close to the lower end of the fixed rod 8 can be opened, and at the same time, to ensure that the exhaust hole 9 is in a blocked state when the first movable block 7 moves away from the second movable block 10, an inverted "T" structured channel 11 is provided in the fixed rod 8, the upper end of the channel 11 is connected to the exhaust hole 9, and the other two ends of the channel 11 are respectively connected to the two sides of the fixed rod 8, when the blocking block 13 on the inner wall of the connecting hole of the second movable block 10 is flush with the channel 11, under the action of the first elastic member 12, the blocking block 13 is pushed into the channel 11 to block the channel 11, thereby achieving the blocking of the exhaust hole 9.

[0071] When the first movable block 7 moves toward the second movable block 10, the first movable block 7 compresses the natural gas remaining in the sampling tube 3, forcing the natural gas to enter the channel 11 through the exhaust hole 9 and act on the blocking block 13 in the channel 11. As the pressure generated by the first movable block 7 during the movement gradually increases, when the pressure is greater than the elastic force of the first elastic member 12, the blocking block 13 is forced to compress the first elastic member 12 and retract into the first accommodating chamber. At this time, the fixing rod 8 removes the restraining force of the blocking block 13 on it, and the second telescopic member Reference numeral 15 denotes a bellows. When the first movable block 7 moves in the sampling tube 3, the gas pressure generated by the compressed natural gas can force the fixed rod 8 to actively move toward the gas pipe 2, and cause the channel 11 on the fixed rod 8 to be misaligned with the first accommodating cavity, and finally the channels 11 on both sides of the fixed rod 8 are extended into the gas pipe 2, thereby achieving the connection between the gas pipe 2 and the exhaust hole 9, so that the natural gas remaining in the sampling tube 3 can finally enter the gas pipe 2 through the exhaust hole 9 and the channel 11 in sequence, and discharge the gas remaining in the sampling tube 3 in the previous sampling period.

[0072] When the first movable block 7 and the second movable block 10 are brought together, the second movable block 10 blocks the channel 11, that is, under the action of the second telescopic member 15, the fixed rod 8 can be pulled back to retract. When the channel 11 on the fixed rod 8 is retracted to be flush with the blocking block 13, under the action of the first elastic member 12, the blocking block 13 is reinserted into the channel 11, and the channel 11 is blocked by the set blocking block 13, and the second movable block 10 is re-fixed on the fixed rod 8, thereby ensuring that the exhaust hole 9 is in a closed state.

[0073] A second accommodating cavity is also provided on both sides of the inner wall of the sampling tube 3, and a second elastic member 16 and a limit block 17 are provided in the second accommodating cavity; a third accommodating cavity is provided on both sides of the second movable block 10, and when the third accommodating cavity on the second movable block 10 moves to be flush with the second accommodating cavity, the elastic force generated by the second elastic member 16 can push the limit block 17 to be inserted into the third accommodating cavity.

[0074] In the present technical solution, when the exhaust hole 9 needs to be connected to the gas pipe 2, the second movable block 10 needs to be separated from the fixed rod 8, and the second movable block 10 also needs to be fixed to the inner wall of the sampling tube 3, so as to ensure that the fixed rod 8 can move smoothly on the second movable block 10. Therefore, a second elastic member 16 and a limit block 17 are provided on the inner wall of the sampling tube 3. The elastic force generated by the second elastic member 16 is used to push the limit block 17 to be inserted into the third accommodating cavity of the second movable block 10, thereby realizing the fixation between the second movable block 10 and the sampling tube 3.

[0075] A first unlocking block 23 is provided at the end of the first movable block 7 facing the second movable block 10, and a notch is provided at the end of the first unlocking block 23 facing the second movable block 10, in which a third elastic member 22 and a second unlocking block 21 are provided; a groove 14 is provided on the end face of the second movable block 10 facing the first movable block 7, and the first unlocking block 23 can be inserted into the groove 14, and the groove 14 is connected to the third accommodating cavity; the elastic force of the third elastic member 22 is greater than the elastic force of the second elastic member 16.

[0076] When it is necessary to sample the natural gas in the gas pipe 2, in order to ensure that the second movable block 10 can be smoothly separated from the sampling tube 3, a first unlocking block 23, a third elastic member 22 and a second unlocking block 21 are also provided on the first movable block 7. When the first movable block 7 and the second movable block 10 are brought close to each other, the first unlocking block 23 on the first movable block 7 can be inserted into the groove 14 on the second movable block 10. When the first movable block 7 and the second movable block 10 are completely close to each other, the second unlocking block 21 is flush with the limit block 17, and under the action of the third elastic member, the limit block 17 is pushed back into the second accommodating cavity by the second unlocking block 21, thereby realizing the removal of the constraint of the limit block 17 on the second movable block 10, so that the second movable block 10 can smoothly move in the sampling tube 3 following the fixed rod 8.

[0077] The limiting block 17 and the second unlocking block 21 are both conical structures, and the cone tips of the limiting block 17 and the second unlocking block 21 face each other.

[0078] Since the second unlocking block 21 needs to retract the limit block 17 into the second accommodating cavity, when the first movable block 7 moves back in the direction away from the second movable block 10, in order to ensure that the second unlocking block 21 located in the third accommodating cavity can be smoothly moved out of the groove 14 of the second movable block 10, the second unlocking block 21 is set to a conical structure, so that when the second unlocking block 21 moves upward, the conical surface of the second unlocking block 21 is used to force the second unlocking block 21 to retract toward the third elastic member 22, so that the second unlocking block 21 can smoothly pass through the groove 14;

[0079] Similarly, when the first unlocking block 23 on the first movable block 7 is inserted into the groove 14, the upper surface of the second movable block 10 acts on the conical surface of the second unlocking block 21, forcing the second unlocking block 21 to compress the third elastic member 22, thereby smoothly inserting it into the groove 14.

[0080] When the fixed rod 8 drives the second movable block 10 and the first movable block 7 to extend into the gas pipe 2, it is necessary to return the first movable block 7 and the second movable block 10 to the sampling tube 3 in turn. In order to ensure that the first movable block 7 and the second movable block 10 can pass through the limit block 17 smoothly, the limit block 17 is also set to a conical structure, and the second movable block 10 and the first movable block 7 act on the conical surface of the limit block 17, so that the limit block 17 is retracted into the second accommodating cavity.

[0081] In the process of using the first movable block 7 to discharge the natural gas collected in the previous period in the sampling tube 3, when the first movable block 7 and the second movable block 10 are completely close to each other, although the impurities in the sampling tube 3 are completely discharged at this time, a part of the impurities still remain in the exhaust hole 9 and the channel 11, and the impurities in this part cannot be completely discharged. If the channel 11 on the fixed rod 8 is connected, the negative pressure generated during the back movement of the first movable block 7 will preferentially collect the impurities remaining in the exhaust hole 9 and the channel 11 into the sampling tube, affecting the sampling accuracy. For this reason, the technical solution is further provided with a one-way valve (not shown in the figure) in the exhaust hole 9, so that in the process of discharging the impurities in the sampling tube 3, the gas in the sampling tube 3 can only pass through the exhaust hole 9 in sequence through the one-way valve. , channel 11 enters into the gas pipe 2 to discharge the impurities. When it is necessary to collect natural gas, the fixed rod 8 is first moved back, and the channel 11 is re-sealed with the blocking block 13. Then the first movable block 7 and the second movable block 10 are extended into the gas pipe 2 together. Since the blocking block 13 on the second movable block 10 blocks the channel 11 and the one-way valve located at the exhaust hole 9 is used, the channel 11 and the exhaust hole 9 are in a blocked state at this time. Therefore, when the first movable block 7 is retreating into the sampling tube 3, the residual gas in the channel 11 and the exhaust hole 9 cannot be sucked into the sampling tube 3, and the natural gas in the gas pipe 2 during this period is quickly sucked into the sampling tube 3, thereby realizing the rapid sampling of natural gas in a certain period of time.

[0082] In addition, the present technical solution extends the first movable block 7 and the second movable block 10 into the gas pipe 2 together, which, compared with the channel 11, enlarges the diameter of the natural gas entering the gas pipe 3 and improves the efficiency of collecting natural gas.

[0083] At the same time, in the technical solution, when the gas in the pipe 3 is passed into the exhaust hole 9, the blocking block 13 in the channel 11 is forced to retract into the first accommodating chamber under the action of air pressure, so that the fixing rod 8 can be extended into the gas pipe 2, and the channel 11 and the gas pipe 2 are in a connected state. After the exhaust is completed, the fixing rod 8 can move back again, and the blocking block 13 can be used to block the channel 11 on the one hand, and the second movable block 10 can be fixed to the fixing rod 8 again on the other hand, so as to ensure that the subsequent second movable block 10 can be extended into the gas pipe 2 together with the fixing rod 8. The reason why the technical solution adopts the above method is that there are certain solid impurities in the natural gas in some gas pipes 2, such as mud and sand. , rock particles. If the channel 11 is always in communication with the gas pipe 2 during use, after a long time, solid impurities in the natural gas will easily enter the channel 11, which may easily cause the channel 11 to be blocked, making it impossible to discharge the impurities in the sampling tube 3 through the channel 11. Therefore, in the technical solution, when it is necessary to discharge the impurities in the sampling tube 3, the fixed rod 8 can automatically extend into the gas pipe 2 to achieve the connection between the gas pipe 2 and the channel 11. After the impurities are discharged, the fixed rod 8 can be retracted to retract the channel 11 from the gas pipe 2 to the second movable block 10, thereby avoiding the channel 11 being exposed to the gas pipe 2 for a long time, which may easily cause the channel 11 to be blocked.

[0084] Example 3

[0085] like Fig. 9 As shown, the step-by-step computing natural gas energy metering Internet of Things system includes a user platform, a service platform, a management platform, a sensor network platform, and a perception control platform that interact in sequence;

[0086] The perception control platform is the above-mentioned natural gas energy metering device, and the perception control platform transmits the acquired perception information to the management platform through the sensor network platform;

[0087] The management platform includes an energy metering management system, which performs comprehensive analysis and processing on the received perception information, transmits user demand information to the user platform through the service platform, and issues control instructions to the perception control platform through the sensor network platform. This embodiment realizes the intelligent management and operation of natural gas energy metering by establishing an Internet of Things operation system.

[0088] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A step-by-step calculation type natural gas energy metering device, characterized in that: It comprises a housing (1), wherein a heat generation analysis and processing module, a flow comprehensive analysis and processing module and an energy calculation module are arranged in the housing (1); The calorific value analysis and processing module is used to calculate the unit calorific value of natural gas and transmit the calculation result to the energy calculation module; The flow comprehensive analysis and processing module is used to obtain natural gas sensing information, calculate standard flow information and transmit it to the energy calculation module; The energy calculation module calculates the natural gas energy according to the acquired standard flow information and the natural gas unit calorific value information of the corresponding time period; The input end of the calorific value analysis and processing module is provided with a sample gas processing system and a standard gas processing system, the input end of the sample gas processing system is also provided with a sample gas controller, the input end of the sample gas controller is also provided with a sample gas collection interface, and the input end of the standard gas processing system is also provided with a standard gas collection interface; The standard gas processing system is used to remove impurities from the collected standard gas, and the calorific value analysis and processing module calculates the calorific value of the standard gas after impurities are removed, and compares the calculation result with the standard value of the calorific value of the standard gas to realize the calibration of the calorific value analysis and processing module; the sample gas processing system is used to remove impurities from the collected natural gas, and the calorific value analysis and processing module calculates the unit calorific value of the natural gas after impurities are removed, and transmits the calculation result to the energy calculation module; It also comprises a gas pipe (2) penetrating the shell (1), the gas sample collection interface comprising a sampling tube (3) arranged in the shell (1) and connected to the gas pipe (2), an air pump (4) connected to the sampling tube (3) is also arranged on the outer wall of the sampling tube (3), a fixing rod (8) is arranged in the sampling tube (3), the fixing rod (8) can be extended into the sampling tube (3), and a first movable block (7) and a second movable block (10) with an outer diameter matching the inner diameter of the sampling tube (3) are slidably arranged on the fixing rod (8); The fixed rod (8) is also provided with an exhaust hole (9) for exhausting the fluid in the sampling tube (3), and when the first movable block (7) moves toward the second movable block (10), the exhaust hole (9) can be opened; It also comprises a first telescopic member (5) arranged in the sampling tube (3), wherein one end of the first telescopic member (5) is connected to the inner wall of the housing (1), and the other end is connected to the first movable block (7) along the axial direction of the sampling tube (3); The fixing rod (8) is inserted into the first telescopic member (5) along the axial direction of the first telescopic member (5); A second telescopic member (15) is also provided inside the first telescopic member (5); one end of the second telescopic member (15) is connected to the inner top surface of the first telescopic member (5), and the other end is connected to the fixing rod (8); The first telescopic member (5) and the second telescopic member (15) are both bellows and are connected to the pump body via air pipes respectively.

2. The step-by-step calculation type natural gas energy metering device according to claim 1 is characterized in that: It also includes a touch display, a flow sensor, a pressure sensor, and a temperature sensor. The flow comprehensive analysis and processing module is used to analyze and process the signals collected by the flow sensor, the pressure sensor, and the temperature sensor, calculate the natural gas working condition flow rate, and realize the conversion to the standard condition flow rate; The touch display is connected to the flow comprehensive analysis and processing module, the calorific value analysis and processing module and the energy calculation module respectively, and can send control instructions to the flow comprehensive analysis and processing module, the calorific value analysis and processing module and the energy calculation module to adjust the parameters within the authority.

3. The step-by-step calculation type natural gas energy metering device according to claim 1 is characterized in that: It also includes a communication module, which is communicatively connected with the energy calculation module to realize external communication of the step-by-step calculation type natural gas energy metering device.

4. The step-by-step calculation type natural gas energy metering device according to claim 1 is characterized in that: A channel (11) is further provided in the fixing rod (8), one end of the channel (11) being in communication with the exhaust hole (9), and the other end of the channel (11) being in communication with the side wall of the fixing rod (8); The second movable block (10) is provided with a connecting hole whose inner diameter matches the outer diameter of the fixing rod (8), and the fixing rod (8) is inserted into the connecting hole. A first accommodating cavity is provided on the inner wall of the connecting hole, and a first elastic member (12) and a blocking block (13) are provided in the first accommodating cavity. The elastic force generated by the first elastic member (12) can push the blocking block (13) to be inserted into the channel (11) and block the channel (11).

5. The step-by-step calculation type natural gas energy metering device according to claim 1 is characterized in that: Second accommodating cavities are also provided on both sides of the inner wall of the sampling tube (3), and a second elastic member (16) and a limit block (17) are provided in each of the second accommodating cavities; A third accommodating cavity is provided on both sides of the second movable block (10); when the third accommodating cavity on the second movable block (10) moves to be flush with the second accommodating cavity, the elastic force generated by the second elastic member (16) can push the limit block (17) to be inserted into the third accommodating cavity.

6. The step-by-step calculation type natural gas energy metering device according to claim 5 is characterized in that: A first unlocking block (23) is provided at the end of the first movable block (7) facing the second movable block (10); a notch is provided at the end of the first unlocking block (23) facing the second movable block (10); a third elastic member (22) and a second unlocking block (21) are provided in the notch; The end surface of the second movable block (10) facing the first movable block (7) is provided with a groove (14), the first unlocking block (23) can be inserted into the groove (14), and the groove (14) is communicated with the third accommodating cavity; The elastic force of the third elastic member (22) is greater than the elastic force of the second elastic member (16).

7. The step-by-step calculation type natural gas energy metering Internet of Things system is characterized by: It includes a user platform, a service platform, a management platform, a sensor network platform, and a perception control platform that interact in sequence; The perception control platform is a natural gas energy metering device as described in any one of claims 1 to 6, and the perception control platform transmits the acquired perception information to the management platform through the sensor network platform; The management platform includes an energy metering management system, which performs comprehensive analysis and processing on the received perception information, transmits user demand information to the user platform through the service platform, and issues control instructions to the perception control platform through the sensor network platform.

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