Solar energy utilization compressed natural gas unloading pry

Abstract

The utility model discloses a compressed natural gas unloading pry utilizing solar energy, which comprises a box body, two paths of heating, pressure regulating and metering devices are arranged in the box body, and two unloading columns are arranged on one side of the box body. The compressed natural gas unloading pry can effectively solve the problems that the compressed natural gas unloading pry selects and utilizes heat sources, distribution of temperature and pressure, control of return pressure, prevention of gas leakage and the like, so that the compressed natural gas unloading pry is more energy-saving and environment-friendly when being used; and meanwhile, the stability of the water and electricity dual-purpose two-stage heat exchanger in the box body can be fully guaranteed, so that the safety and the stability of the compressed natural gas unloading pry are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas unloading skids, in particular to a unloading skid for compressing natural gas using solar energy. Background Art

[0002] After the release skid is produced, the production equipment needs to be transported to the release station for installation and disassembly, which improves the processing efficiency and reduces the labor intensity of workers. However, during transportation, the equipment on the release skid may shake. Since each device is rigidly connected to the angle steel or I-beam, this can easily cause damage to the equipment, which may lead to accidents during later use.

[0003] In order to solve the above technical problems, there is a CNG release skid with a Chinese patent publication number of CN209415023U, which includes a chassis, two mounting plates are fixed on the chassis, two fixing devices are fixed on opposite sides of the two mounting plates, a mounting box is fixed between the four fixing devices, two parallel slide grooves are provided at the bottom of the mounting box, two sliders are installed in the slide groove, the upper ends of the four sliders are rotatably connected with connecting rods, the upper end of the mounting box is provided with four openings, the upper ends of the four connecting rods respectively pass through the four openings and extend to the upper end of the mounting box, a pressure plate is fixed on the upper ends of the four connecting rods, and two limit rods are fixed on the opposite side walls of the mounting box. The utility model achieves the purpose of protecting the equipment on the release skid during transportation, reducing the shaking of the equipment during transportation, thereby avoiding equipment collision and causing damage, thereby facilitating later use and reducing the occurrence of later accidents.

[0004] However, the existing CNG unloading skids cannot effectively solve the problems of which heat source to use, how to distribute temperature and pressure, how to control the return pressure, and how to prevent gas leakage, so improvements are needed. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a solar energy-utilizing compressed natural gas unloading skid.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The solar energy utilizing compressed natural gas unloading skid comprises a box body, wherein two-way heat increasing, pressure regulating and metering devices are arranged in the box body, and two unloading columns are arranged on one side of the box body;

[0008] A two-stage water-electric dual-purpose heat exchanger is provided at the rear end of the two-way heat-increasing, pressure-regulating and metering devices. Electric heating rods are inserted at both ends of the two two-stage water-electric dual-purpose heat exchangers. A high-pressure switching ball valve is provided at the inlet of the two-way heat-increasing, pressure-regulating and metering devices. A pneumatic emergency shut-off valve, a high-pressure filter, a pressure gauge 1 and a pressure transmitter 1 are provided on the two-way heat-increasing, pressure-regulating and metering devices in sequence. A circulating hot water inlet gate and a circulating hot water outlet gate are provided on the two two-stage water-electric dual-purpose heat exchangers. A first-level heat exchange coil is provided on the two two-stage water-electric dual-purpose heat exchangers. A first-level pressure regulator is provided on the outlet of the two first-level heat exchange coils. The two first-level heat coils are connected to the two heat-increasing , pressure regulating and metering devices all pass through a first-level pressure regulating bypass pipeline. A bypass high-pressure ball valve and a bypass high-pressure pneumatic emergency shut-off valve are arranged in sequence on the two first-level pressure regulating bypass pipelines. A secondary coil is arranged at the other end of the two water-electric dual-purpose two-stage heat exchangers. A second pressure gauge, a second pressure transmitter, a first safety relief valve group, a secondary pressure regulator are arranged in sequence on the two secondary coils. The low-pressure gas after pressure regulation passes through a pressure regulating outlet switching butterfly valve, a switching butterfly valve, a Y-type filter, a flow meter, and an outlet butterfly valve. An outlet pipeline is arranged at one end of the two secondary coils. One end of the outlet pipeline is arranged in a box. A thermometer and a temperature transmitter are arranged on the outlet pipeline.

[0009] Preferably, in order to control the return pressure, two unloading areas are provided on one side of the box body, and long tube carriers are provided in the two unloading areas. High-pressure hoses are provided on the two long tube carriers, and one end of the two high-pressure hoses is respectively connected to the two unloading columns, and the two unloading columns are respectively provided with a high-pressure exhaust valve, a high-pressure ball valve, and a high-pressure check valve.

[0010] Preferably, in order to better utilize the heat source and temperature and pressure distribution, an expansion tank, a water storage tank, and a vacuum tube solar water heater collecting tube are provided at the upper end of the box body, and a water collector, a pipeline filter, and an explosion-proof pipeline circulation pump are provided inside the box body.

[0011] Preferably, in order to improve the safety of the box and better prevent gas leakage, a combustible gas leak alarm probe is provided on one side of the box, and an explosion-proof axial flow fan is provided on the other side of the box, and the explosion-proof axial flow fan is interlocked with the combustible gas leak alarm probe.

[0012] Preferably, in order to connect the two secondary coils, a connecting pipe is provided between the two secondary coils, and a second safety relief valve group is provided on the connecting pipe. The second safety relief valve group is located between the pressure regulating outlet switching butterfly valve and the switching butterfly valve through which the low-pressure gas after pressure regulation passes.

[0013] Preferably, in order to fully support the hydropower two-stage heat exchanger, a bearing mechanism is provided at the lower end of the hydropower two-stage heat exchanger, the bearing mechanism includes a base, the base is installed at the bottom of the box body, an adjusting mechanism is provided in the base, two clamping plates are provided on the adjusting mechanism, the two clamping plates correspond to each other, and the upper ends of the two clamping plates are rotatably connected to a rotating plate, a fourth spur rack is fixed on one side of the base, a connecting piece is installed on one side of the two clamping plates, one end of the two connecting pieces are rotatably connected to a second gear, and the two second gears are meshed with the fourth spur rack, a third U-shaped rod is fixed on one side of the base, two shaft sleeves are slidably sleeved on the third U-shaped rod, vertical rods are fixed on the upper ends of the two shaft sleeves, and the two vertical rods are slidably sleeved with the third spur racks, the two third spur racks are respectively meshed with the two second gears, and the two second gears are located between the two third spur racks, and a push rod is rotatably connected to the upper end of the third spur rack, and a horizontal shaft is rotatably sleeved on the upper end of the push rod, and the horizontal shaft is fixed on one side of the rotating plate.

[0014] Preferably, in order to facilitate adjustment according to needs and adapt to different water-electric dual-purpose two-stage heat exchangers to be added, the adjustment mechanism includes a handle rotatably sleeved on the base, one end of the handle extends into the base, a first gear is fixed to one end of the handle, sliding sleeves are fixed on both sides of the upper end of the base, a first U-shaped rod and a second U-shaped rod are slidingly sleeved in the two sliding sleeves respectively, one side of the two clamping plates is respectively fixed to the opposite end of the first U-shaped rod and the second U-shaped rod, one end of the first U-shaped rod and the second U-shaped rod are both located in the base, one end of the first U-shaped rod and the second U-shaped rod are respectively fixed with a first straight rack, the two first straight racks are respectively located at the upper and lower ends of the first gear, and the two first straight racks are both meshed with the first gear.

[0015] Preferably, in order to avoid excessive movement and ensure safety of use, a fastening bolt is threaded on one of the sliding sleeves, a baffle is fixed to one end of one of the first straight racks, the baffle corresponds to the first gear, and rotating shafts are installed on both sides of the upper end of the clamping plate and one side of the rotating plate.

[0016] Preferably, in order to ensure the stability of the engagement and better support and clamp the two-stage water-electric dual-purpose heat exchanger to be added, springs are sleeved at both ends of the third U-shaped rod, and the two shaft sleeves are located in the two springs. The two ends of the spring are respectively fixed on one side of the shaft sleeve and the third U-shaped rod.

[0017] Preferably, the rotating plate can be rotated by an electric telescopic rod, so as to better assist the clamping plate in clamping the water-electric dual-purpose two-stage heat exchanger, and the clamping plate and the rotating plate are rotatably connected with the electric telescopic rod.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. Through the use of two-way heat increase, pressure regulation, metering devices and two water-electric dual-purpose two-stage heat exchangers, it is possible to achieve a two-stage heat exchange and two-stage pressure reduction design. The pressure after the first stage of pressure reduction is set to 4MPa. This design can set the natural gas heating temperature to 50°C, which is convenient for the distribution of the heat exchange area and water temperature of the two-stage heat exchange, and also ensures that the minimum temperature is higher than -20°C, which is convenient for material selection and cost control. The minimum water temperature of 60°C makes the use of solar water heaters possible, which truly plays a role in energy conservation and environmental protection, and saves users a lot of operating costs. At the same time, the solar water heater is placed above the box body, which does not occupy extra space and has a better use effect. Therefore, it can effectively solve the problems of what kind of heat source to use for the compressed natural gas unloading skid and how to distribute the temperature and pressure;

[0020] 2. By setting up a bypass pipeline across the first adjustment, the problem of high return pressure and high operating cost of the high-pressure long-tube carrier is solved. At the same time, the triple safety protection is designed to ensure the safety of equipment use, minimize the dangers caused by accidental operating errors, and effectively solve the safety problem of compressed natural gas unloading skids;

[0021] 3. The design interlocks the methane concentration with the explosion-proof axial flow fan. The fan is automatically started and stopped according to the concentration changes in the box, thereby controlling the methane concentration in the box within a safe range, greatly reducing the risk of frequent alarms in the control system and automatic shutdown of the system due to micro-leakage of gas, and also greatly improving the safety and stability of equipment operation;

[0022] 4. It can effectively adapt to different specifications of water and electricity dual-purpose two-stage heat exchangers, and can effectively clamp and fix them, and is easy to rotate according to needs to align the equipment;

[0023] In summary, the utility model can effectively solve the problems of which heat source to use for the compressed natural gas unloading skid, how to distribute the temperature and pressure, how to control the return pressure and how to prevent gas leakage, so that the compressed natural gas unloading skid is more energy-saving and environmentally friendly when in use, and can fully ensure the stability of the water and electricity dual-purpose two-stage heat exchanger in the box, so as to ensure the safety and stability of the compressed natural gas unloading skid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a connection structure diagram of the solar energy compressed natural gas unloading skid proposed by the utility model;

[0025] Figure 2 This is a structural diagram of the bearing mechanism of the utility model;

[0026] Figure 3 It is a top view of the carrying mechanism of the utility model;

[0027] Figure 4 For the utility model Figure 3A magnified image of point A;

[0028] Figure 5 It is a schematic diagram of the third U-shaped rod structure of the carrying mechanism of the utility model.

[0029] In the figure: 1 long tube carrier, 2 high pressure hose, 3 high pressure exhaust valve, 4 high pressure ball valve, 5 high pressure check valve, 6 box, 7 high pressure switching ball valve, 8 pneumatic emergency shut-off valve, 9 high pressure filter, 10 pressure gauge 1, 11 pressure transmitter 1, 12 water and electricity dual-purpose two-stage heat exchanger, 13 electric heating rod, 14 circulating hot water inlet stop valve, 15 first level pressure regulator, 16 bypass high pressure ball valve, 17 bypass high pressure pneumatic emergency shut-off valve, 18 circulating hot water outlet stop valve, 19 pressure gauge 2, 20 pressure transmitter 2, 21 first safety relief valve group, 22 second level pressure regulator, 23 low pressure gas after pressure regulation passes through pressure regulating outlet switching butterfly valve, 24 second safety relief valve group, 25 switching butterfly valve, 26 Y-type filter, 27 flow 1. a meter, 2. an outlet butterfly valve, 2. a thermometer, 3. a temperature transmitter, 3. a combustible gas leak alarm probe, 3. a explosion-proof axial flow fan, 3. a water expansion tank, 3. a water storage tank, 3. a vacuum tube solar water heater collector, 3. a water collector, 3. a pipe filter, 3. a explosion-proof pipe circulation pump, 3. a rotating shaft, 4. a rotating plate, 4. a fastening bolt, 4. a first U-shaped rod, 4. a baffle, 4. a base, 4. a splint, 4. a first straight rack, 4. a second U-shaped rod, 4. a first gear, 4. a handle, 5. a sliding sleeve, 5. a third straight rack, 5. a push rod, 5. a fourth straight rack, 5. a second gear, 5. a connecting piece, 5. a horizontal shaft, 5. a sleeve, 5. a vertical rod, 5. a third U-shaped rod, 6. an electric telescopic rod. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Reference Figure 1, the solar energy utilizes compressed natural gas unloading skid, including a box body 6, a combustible gas leakage alarm probe 31 is arranged on one side of the box body 6, and an explosion-proof axial flow fan 32 is arranged on the other side of the box body 6, and the explosion-proof axial flow fan 32 is interlocked with the combustible gas leakage alarm probe 31. The box body 6 is used to convert the high-pressure natural gas CNG in the high-pressure long tube support vehicle into a low-pressure, normal temperature stable pipeline gas through unloading, filtering, heating, pressure regulation, metering, safety control and other methods, and supply the equipment to industrial or civil gas users. The explosion-proof axial flow fan 32 and the combustible gas leakage alarm probe 31 are connected with supporting parts, which is convenient for stable operation, can be programmed, and automatically operated. The explosion-proof axial flow fan 32 and the combustible gas leakage alarm probe 31 are controlled by the control system. The box body 6 is an independent space, and ventilation holes are arranged around the box body 6, but when When a pipeline fails and a large amount of natural gas leaks, the combustible gas leak alarm probe 31 will be sensed. When the methane concentration in the air in the box 6 reaches 20% of the explosion limit, the control system will interlock and start the explosion-proof axial flow fan 32 located in the box 6. The operation of the explosion-proof axial flow fan 32 will discharge the gas in the box 6. When the methane concentration in the air in the box 6 reaches 10% of the explosion limit, the explosion-proof axial flow fan 32 will be automatically shut down. If the methane concentration reaches 30% of the explosion limit, the control system will send out an audible and visual alarm signal to prompt the surrounding personnel to solve the problem on site. After the problem is solved, the alarm needs to be manually closed. When the methane concentration in the air in the box 6 reaches 40% of the explosion limit, the control system will interlock and cut off the system inlet pneumatic emergency shut-off valve 8, stop the equipment from working, and prevent the occurrence of natural gas leakage danger.

[0032] Reference Figure 1, a two-way heat-increasing, pressure-regulating and metering device is arranged in the box body 6, and a water-electric dual-purpose two-stage heat exchanger 12 is arranged at the rear end of the two-way heat-increasing, pressure-regulating and metering devices, and electric heating rods 13 are inserted at both ends of the two water-electric dual-purpose two-stage heat exchangers 12, and the water-electric dual-purpose two-stage heat exchangers 12 are connected with supporting parts for stable operation, and can set programs for automatic operation. The water-electric dual-purpose two-stage heat exchanger 12 is a device that can provide energy consumption in both directions through water and electricity, and the electric heating rod 13 is not connected with the supporting parts for stable operation, and can set programs for automatic operation. The electric heating rod 13 is used to transport heat in the water-electric dual-purpose two-stage heat exchanger 12, and a high-pressure switching ball valve 7 is arranged at the inlet of the two-way heat-increasing, pressure-regulating and metering devices, and the high-pressure switching ball valve 7 is connected with the supporting parts for Stable operation, program setting, control operation through control system, high pressure switching ball valve 7 is used to control the natural gas transmission switch of heating, pressure regulating and metering devices, two-way heating, pressure regulating and metering devices are respectively provided with pneumatic emergency shut-off valve 8, high pressure filter 9, pressure gauge 10, pressure transmitter 11, two water-power dual-purpose two-stage heat exchangers 12 are provided with circulating hot water inlet gate 14, circulating hot water outlet gate 18, two water-power dual-purpose two-stage heat exchangers 12 are provided with primary heat exchange coils, two primary heat exchange coil outlets are provided with primary pressure regulators 15, two primary heat coils and two-way heating, pressure regulating and metering devices are connected through a primary pressure regulating bypass pipeline, which can form a two-stage heat exchange and two-stage pressure reducing device, in the CNG adiabatic throttling During the expansion process, before the gas is depressurized, the heat provided by the heat medium is used to raise the temperature to offset the cooling caused by the Joule-Thomson effect of the gas. The Joule-Thomson coefficient of natural gas is 4℃ / MPa, the maximum inlet pressure of CNG is 20MPa, and the outlet delivery pressure of the pressure reducing skid is generally 0.2~0.4MPa, and the temperature rise is nearly 80℃. If the heat medium is hot water, the outlet temperature of the heat exchanger is close to the maximum temperature of hot water, and the heat exchange area of ​​the heat exchanger needs to be very large, which cannot be designed normally. Therefore, this scheme performs two-stage heat exchange and two-stage pressure reduction. The first-stage heat exchange increases the temperature from -10℃ to 50℃, and the first-stage pressure reduction is reduced from 20MPa to 4MPa at most, with a pressure drop of 16MPa, corresponding to a temperature drop of 64℃, that is, the lowest temperature of the natural gas after the first-stage pressure reduction is -14℃, low temperature The gas immediately enters the secondary heat exchanger and is heated to 25°C. After the secondary pressure reduction, the outlet temperature is about 10°C. The normal temperature gas with stable pressure enters the back-end gas pipe network after metering. Since the gas temperature is not lower than -20°C during operation, carbon steel pipelines and ordinary material pressure regulators and instruments can be used for transportation and pressure reduction, which improves the cost performance of the equipment and work safety. The two primary pressure regulating bypass pipelines are respectively provided with bypass high-pressure ball valves 16 and bypass high-pressure pneumatic emergency shut-off valves 17. The bypass high-pressure ball valve 16 is used to control the high-pressure transmission switch of the primary pressure regulating bypass pipeline. The bypass high-pressure pneumatic emergency shut-off valve 17 can cut off the primary pressure regulating bypass pipeline in an emergency. The other end of the two water and electricity dual-purpose two-stage heat exchangers 12 is provided with secondary coils.The two secondary coils are respectively provided with a pressure gauge 219, a pressure transmitter 220, a first safety relief valve group 21, a secondary pressure regulator 22, a pressure-regulated low-pressure gas passes through a pressure-regulated outlet switching butterfly valve 23, a switching butterfly valve 25, a Y-type filter 26, a flow meter 27, and an outlet butterfly valve 28. The pressure gauge 219, the pressure transmitter 220, the first safety relief valve group 21, the secondary pressure regulator 22, the pressure-regulated low-pressure gas passes through a pressure-regulated outlet switching butterfly valve 23, a switching butterfly valve 25, a Y-type filter 26, a flow meter 27, and an outlet butterfly valve 28. 5. Y-type filter 26, flow meter 27, outlet butterfly valve 28 are all connected with supporting parts for stable operation, program setting and automatic operation. Pressure gauge 2 19 is used to detect the pressure in the secondary coil, and pressure transmitter 2 20 is used to change and control the pressure in the secondary coil. Through pressure gauge 2 19, pressure transmitter 2 20, first safety relief valve group 21, secondary pressure regulator 22, the low-pressure gas after pressure regulation passes through pressure regulating outlet switching butterfly valve 23, switching butterfly valve 25, Y The filter 26, flow meter 27 and outlet butterfly valve 28 can better control the pressure of the natural gas transported in the secondary coil, making the transportation of the natural gas in the box 6 safer and more reliable. A connecting pipe is commonly provided between the two secondary coils, and a second safety relief valve group 24 is provided on the connecting pipe. The second safety relief valve group 24 is located between the pressure regulating outlet switching butterfly valve 23 and the switching butterfly valve 25 through which the low-pressure gas after pressure regulation passes. The two secondary coils can be interconnected through the connecting pipe. An outlet pipe is commonly provided at one end of the two secondary coils, and one end of the outlet pipe is arranged in the box 6. A thermometer 29 and a temperature transmitter 30 are arranged on the outlet pipe. The two secondary coils can transport the natural gas to the outlet pipe. The thermometer 29 and the temperature transmitter 30 are connected to the matching parts for stable operation, and can be programmed for automatic operation. The thermometer 29 is used to detect the temperature of the outlet pipe, and the temperature transmitter 30 is used to control the temperature of the natural gas in the outlet pipe.

[0033] Reference Figure 1Two unloading columns are arranged on one side of the box body 6. The two sets of unloading columns are set up in one open and one standby mode, and they are switched to each other to ensure uninterrupted gas supply when the long tube carrier 1 is switched or any component fails. The unloading column is connected to the box body 6 through a high-pressure pipeline. Two unloading areas are arranged on one side of the box body 6. Long tube carriers 1 are arranged in both unloading areas. High-pressure hoses 2 are arranged on both long tube carriers 1. One end of the two high-pressure hoses 2 is connected to the two unloading columns respectively. The long tube carrier 1 is a vehicle for transporting compressed natural gas. Compressed natural gas can be transported through the high-pressure hoses 2. The compressed natural gas is transported to the long tube carrier 1. The unloading column can transport the compressed natural gas in the box 6 to the long tube carrier 1 through the high-pressure hose 2. The two unloading columns are successively provided with a high-pressure exhaust valve 3, a high-pressure ball valve 4, and a high-pressure check valve 5. The high-pressure exhaust valve 3, the high-pressure ball valve 4, and the high-pressure check valve 5 are all connected with supporting components for stable operation. The program can be set and the operation can be automatic. The high-pressure exhaust valve 3, the high-pressure ball valve 4, and the high-pressure check valve 5 can be used to control the switch of the two unloading columns, and the return pressure can be controlled at the same time to ensure the safety and stability of compressed natural gas during transportation.

[0034] Reference Figure 1 , an expansion water tank 33, a water storage tank 34, and a vacuum tube solar water heater collecting tube 35 are arranged at the upper end of the box body 6, and a water collector 36, a pipeline filter 37, and an explosion-proof pipeline circulation pump 38 are arranged in the box body 6. The vacuum tube solar water heater collecting tube 35 is a device that can convert solar energy into thermal energy. During the day, the vacuum tube solar water heater collecting tube 35 absorbs heat to generate high-temperature hot water and stores it in the water storage tank 34, which can greatly reduce energy consumption. The water collector 36 and the explosion-proof pipeline circulation pump 38 are turned on to circulate and heat the natural gas. When the water temperature is not enough, the electric heater is turned on. At night or on cloudy days, the water collector 36 and the explosion-proof pipeline circulation pump 38 are turned off, and the electric heater is used for independent heating. This method can save more than 40% of energy compared with relying solely on electric heaters for heating. Generally, the investment cost of the solar water heater can be recovered in three months. The solar water heater is placed above the box body 6, does not occupy extra space, has an explosion-proof design, and is safe and reliable.

[0035] Reference Figure 1-5 A bearing mechanism is provided at the lower end of the dual-purpose two-stage heat exchanger 12, and the bearing mechanism includes a base 44, and the base 44 is installed at the bottom of the box body 6. An adjusting mechanism is provided in the base 44, and two clamping plates 45 are provided on the adjusting mechanism. The two clamping plates 45 correspond to each other. The operation of the two clamping plates 45 can be well controlled by the regulating mechanism, and the distance between the two clamping plates 45 is convenient to adjust, which can well adapt to dual-purpose two-stage heat exchangers 12 of various specifications.

[0036] Reference Figure 2 , 3The adjustment mechanism includes a handle 49 rotatably sleeved on the base 44, one end of the handle 49 extends into the base 44, one end of the handle 49 is fixed with a first gear 48, and the handle 49 can well drive the first gear 48 to rotate, and both sides of the upper end of the base 44 are fixed with sliding sleeves 50, and the first U-shaped rod 42 and the second U-shaped rod 47 are slidably sleeved in the two sliding sleeves 50, and one side of the two clamps 45 is respectively fixed to the opposite end of the first U-shaped rod 42 and the second U-shaped rod 47, and the first U-shaped rod 42 and the second U-shaped rod 47 can be well driven by the two sliding sleeves 50. The stability of the movement of 47 ensures that one end of the first U-shaped rod 42 and the second U-shaped rod 47 are both located in the base 44, and one end of the first U-shaped rod 42 and the second U-shaped rod 47 are respectively fixed with a first straight rack 46, and the two first straight racks 46 are respectively located at the upper and lower ends of the first gear 48, and the two first straight racks 46 are both meshed with the first gear 48. When the handle 49 is rotated, the first gear 48 can be rotated. By controlling the rotation direction of the first gear 48, the movement direction of the two first straight racks 46 can be well controlled, thereby achieving the purpose of controlling the movement direction of the two splints 45.

[0037] Reference Figure 2-5 , the upper ends of the two clamping plates 45 are rotatably connected to the rotating plate 40 for easy rotation, a fourth spur rack 53 is fixed to one side of the base 44, a connecting piece 55 is installed on one side of the two clamping plates 45, one end of the two connecting pieces 55 are rotatably connected to the second gear 54 for easy rotation of the second gear 54, when the clamping plate 45 moves, the clamping plate 45 will push the connecting piece 55 to drive the second gear 54 to rotate, the two second gears 54 are meshed with the fourth spur rack 53, and the second gear 54 rotates under the action of the fourth spur rack 53, a third U-shaped rod 59 is fixed to one side of the base 44, two shaft sleeves 57 are slidably sleeved on the third U-shaped rod 59, the upper ends of the two shaft sleeves 57 are fixed with vertical rods 58, the two vertical rods 58 are slidably sleeved with the third spur rack 51, so as to ensure the stability of the movement and lifting of the third spur rack 51, the two third The spur racks 51 are respectively meshed with the two second gears 54, and the rotation of the second gear 54 can well control the lifting and lowering of the third spur rack 51. The two second gears 54 are located between the two third spur racks 51. The upper end of the third spur rack 51 is rotatably connected to a push rod 52, and the upper end of the push rod 52 is rotatably sleeved with a transverse shaft 56. The transverse shaft 56 is fixed to one side of the rotating plate 40. The clamping plate 45 and the rotating plate 40 are rotatably connected with an electric telescopic rod 60. The lifting and lowering of the third spur rack 51 can drive the rotating plate 40 to rotate through the transverse shaft 56, which can well adapt to different specifications of water-power dual-purpose two-stage heat exchangers, further enhance the support and clamping strength. When in use, when there is a problem with the push rod 52 and the transverse shaft 56, the electric telescopic rod 60 can operate to rotate the rotating plate 40, and can cooperate with the clamping plate 45 to clamp the water-power dual-purpose two-stage heat exchanger, and is easy to disassemble.

[0038] Reference Figure 5 Both ends of the third U-shaped rod 59 are sleeved with springs, and the two shaft sleeves 57 are located in the two springs. The two ends of the spring are respectively fixed on one side of the shaft sleeve 57 and the third U-shaped rod 59, which can well ensure that the third spur rack 51 is always engaged with the second gear 54, thereby ensuring the stability of the power rotation.

[0039] Reference Figure 2 , 3 A fastening bolt 41 is screwed on one of the sliding sleeves 50 to ensure stability after adjustment and to ensure support and clamping strength for the hydropower two-stage heat exchanger 12. A baffle 43 is fixed to one end of one of the first straight racks 46. The baffle 43 corresponds to the first gear 48, which can effectively avoid excessive movement and ensure safety during use. Rotating shafts 39 are installed on both sides of the upper end of the clamping plate 45 and one side of the rotating plate 40 to facilitate the rotation of the hydropower two-stage heat exchanger 12.

[0040] In the utility model, when in use: it is set in an independent space in the box body 6, and ventilation holes are set around the box body 6. However, when the pipeline fails and a large amount of natural gas leaks, the combustible gas leak alarm probe 31 will be sensed. When the methane content concentration in the air in the box body 6 reaches 20% of the explosion limit, the control system will interlock and start the explosion-proof axial flow fan 32 located in the box body 6. The operation of the explosion-proof axial flow fan 32 will discharge the gas in the box body 6. When the methane content concentration in the air in the box body 6 reaches 10% of the explosion limit, the explosion-proof axial flow fan 32 will be automatically shut down. If the methane content concentration reaches 30% of the explosion limit, the control system will send out an audible and visual alarm signal to prompt the surrounding personnel to solve the problem on site. After the problem is solved, the alarm needs to be manually closed. When the methane concentration in the air in the box body 6 reaches 40% of the explosion limit, the control system will interlock and cut off the system inlet pneumatic emergency shut-off valve 8, stop the equipment from working, and prevent the occurrence of natural gas leakage danger.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solar energy-utilized compressed natural gas unloading skid, comprising a box (6), characterized in that: Two-way heat-increasing, pressure-regulating and metering devices are arranged in the box (6), and two unloading columns are arranged on one side of the box (6); The rear ends of the two-way heat-increasing, pressure-regulating and metering devices are both provided with a two-stage water-electric dual-purpose heat exchanger (12). Both ends of the two water-electric dual-purpose two-stage heat exchangers (12) are inserted with electric heating rods (13). The inlets of the two-way heat-increasing, pressure-regulating and metering devices are both provided with a high-pressure switching ball valve (7). The two-way heat-increasing, pressure-regulating and metering devices are both provided with a pneumatic emergency shut-off valve (8), a high-pressure filter (9), a pressure gauge (10) and a pressure transmitter (11) in sequence. The two water-electric dual-purpose two-stage heat exchangers (12) are both provided with a circulating hot water inlet stop valve (14) and a circulating hot water outlet stop valve (18). The two water-electric dual-purpose two-stage heat exchangers (12) are both provided with a primary heat exchange coil. The outlets of the two primary heat exchange coils are both provided with a primary pressure regulator (15). The two primary heat coils are connected to the two-way heat-increasing, pressure-regulating and metering devices. The two measuring devices are connected through a first-stage pressure regulating bypass pipeline. The two first-stage pressure regulating bypass pipelines are sequentially provided with a bypass high-pressure ball valve (16) and a bypass high-pressure pneumatic emergency shut-off valve (17). The other ends of the two water-electric dual-purpose two-stage heat exchangers (12) are each provided with a second-stage coil. The two second-stage coils are sequentially provided with a second pressure gauge (19), a second pressure transmitter (20), a first safety relief valve group (21), a second-stage pressure regulator (22). The low-pressure gas after pressure regulation passes through a pressure regulating outlet switching butterfly valve (23), a switching butterfly valve (25), a Y-type filter (26), a flow meter (27), and an outlet butterfly valve (28). One end of the two second-stage coils is commonly provided with an outlet pipeline. One end of the outlet pipeline is provided in the box body (6). The outlet pipeline is provided with a thermometer (29) and a temperature transmitter (30).

2. The solar energy compressed natural gas unloading skid according to claim 1, characterized in that: Two unloading areas are arranged on one side of the box body (6), and long tube carriers (1) are arranged in the two unloading areas. High-pressure rubber hoses (2) are arranged on the two long tube carriers (1), and one end of the two high-pressure rubber hoses (2) is connected to two unloading columns respectively. High-pressure exhaust valves (3), high-pressure ball valves (4), and high-pressure check valves (5) are arranged in sequence on the two unloading columns.

3. The solar energy compressed natural gas unloading skid according to claim 1, characterized in that: An expansion water tank (33), a water storage tank (34), and a vacuum tube solar water heater heat collecting pipe (35) are arranged at the upper end of the box body (6), and a water collector (36), a pipeline filter (37), and an explosion-proof pipeline circulation pump (38) are arranged inside the box body (6).

4. The solar energy compressed natural gas unloading skid according to claim 1, characterized in that: A combustible gas leak alarm probe (31) is arranged on one side of the box body (6), and an explosion-proof axial flow fan (32) is arranged on the other side of the box body (6), and the explosion-proof axial flow fan (32) is interlocked with the combustible gas leak alarm probe (31).

5. The solar energy compressed natural gas unloading skid according to claim 1, characterized in that: A connecting pipe is provided between the two secondary coils, and a second safety relief valve group (24) is provided on the connecting pipe. The second safety relief valve group (24) is located between the pressure regulating outlet switching butterfly valve (23) and the switching butterfly valve (25) through which the pressure-regulated low-pressure gas passes.

6. The solar energy compressed natural gas unloading skid according to claim 1, characterized in that: The lower end of the water-power dual-purpose two-stage heat exchanger (12) is provided with a bearing mechanism, the bearing mechanism comprising a base (44), the base (44) being mounted at the bottom of the box body (6), the base (44) being provided with an adjustment mechanism, the adjustment mechanism being provided with two clamping plates (45), the two clamping plates (45) corresponding to each other, the upper ends of the two clamping plates (45) being rotatably connected to a rotating plate (40), a fourth spur rack (53) being fixed to one side of the base (44), a connecting piece (55) being mounted on one side of the two clamping plates (45), one end of the two connecting pieces (55) being rotatably connected to a second gear (54), the two second gears (54) being connected to the fourth spur rack (53) ) are meshed with each other, a third U-shaped rod (59) is fixed on one side of the base (44), two shaft sleeves (57) are slidably sleeved on the third U-shaped rod (59), vertical rods (58) are fixed on the upper ends of the two shaft sleeves (57), and third spur racks (51) are slidably sleeved on the two vertical rods (58), the two third spur racks (51) are respectively meshed with two second gears (54), the two second gears (54) are located between the two third spur racks (51), the upper end of the third spur racks (51) is rotatably connected with a push rod (52), the upper end of the push rod (52) is rotatably sleeved with a transverse shaft (56), and the transverse shaft (56) is fixed on one side of the rotating plate (40).

7. The solar energy compressed natural gas unloading skid according to claim 6, characterized in that: The adjustment mechanism comprises a handle (49) rotatably sleeved on the base (44), one end of the handle (49) extends into the base (44), one end of the handle (49) is fixed with a first gear (48), both sides of the upper end of the base (44) are fixed with sliding sleeves (50), a first U-shaped rod (42) and a second U-shaped rod (47) are slidingly sleeved in the two sliding sleeves (50), one side of two clamping plates (45) is respectively fixed to the opposite ends of the first U-shaped rod (42) and the second U-shaped rod (47), one end of the first U-shaped rod (42) and the second U-shaped rod (47) are both located in the base (44), one end of the first U-shaped rod (42) and the second U-shaped rod (47) are respectively fixed with a first straight rack (46), the two first straight racks (46) are respectively located at the upper and lower ends of the first gear (48), and the two first straight racks (46) are both meshed with the first gear (48).

8. The solar energy compressed natural gas unloading skid according to claim 6, characterized in that: A fastening bolt (41) is screwed onto one of the sliding sleeves (50), a baffle (43) is fixed to one end of one of the first straight racks (46), the baffle (43) corresponds to the first gear (48), and a rotating shaft (39) is installed on both sides of the upper end of the clamping plate (45) and one side of the rotating plate (40).

9. The solar energy compressed natural gas unloading skid according to claim 6, characterized in that: Both ends of the third U-shaped rod (59) are sleeved with springs, the two shaft sleeves (57) are located in the two springs, and the two ends of the spring are respectively fixed on one side of the shaft sleeve (57) and the third U-shaped rod (59).

10. The solar energy compressed natural gas unloading skid according to claim 6, characterized in that: The clamping plate (45) and the rotating plate (40) are rotatably connected to an electric telescopic rod (60).

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