A gas station with a submerged pump and a method for refueling the same

Abstract

The application relates to the technical field of gas stations with submersible pump props, and discloses a gas station with a submersible pump prop and a gas filling method thereof, which comprises a gas station main body, a natural gas storage tank is arranged in the gas station main body, a gas conveying pipeline is connected to the outside of the natural gas storage tank, a first submersible pump prop is connected to the outside of the gas conveying pipeline, a natural gas shunting mechanism is connected to one end of the gas conveying pipeline, a second submersible pump prop is connected to the outside of the natural gas shunting mechanism, a natural gas buffer mechanism is connected to the outside of the natural gas shunting mechanism, and a gas outlet pipeline is connected to the outside of the natural gas buffer mechanism. When the pressure of the natural gas in the shunting bin body changes, the shunting baffle can be driven to move in the shunting bin body to shunt the natural gas in the shunting bin body, the pressure of the natural gas in the shunting bin body can be quickly adjusted, and therefore the natural gas with excessively high pressure can be prevented from entering the inside of the natural gas buffer mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of gas stations with submersible pump skids, specifically to a gas station with a submersible pump skid and a gas refueling method thereof. Background Technology

[0002] As the "heart" of an LNG refueling station, the submersible pump skid ensures the station's efficient, safe, and flexible operation by providing stable power, precise flow control, and high integration.

[0003] Chinese patent CN117091081B discloses a low-emission device and method for a pumped liquefied natural gas (LNG) refueling station, including a cryogenic storage tank, a submersible pump, and a refueling machine. It is equipped with a BOG recovery skid, which has a recovery skid inlet, a recovery skid outlet, and a recovery skid gas inlet. The recovery skid inlet is connected to the submersible pump outlet, the recovery skid outlet is connected to the refueling machine's liquid phase inlet, the recovery skid gas inlet is connected to the cryogenic storage tank's gas phase inlet, the cryogenic storage tank's return gas inlet is connected to the refueling machine's gas phase inlet, and the cryogenic storage tank's liquid phase inlet is connected to the submersible pump inlet.

[0004] In the aforementioned patents and prior art, when refueling at a gas station, the high-pressure gas in the gas storage tank is delivered to the gas cabinet for refueling through multiple submersible pump skids with layer-by-layer pressure reduction. However, during the refueling process, the pressure of the high-pressure gas in the gas storage tank gradually decreases, resulting in low overall utilization of the submersible pump skids and high maintenance and operating costs, which indirectly increases the operating costs and accident rate. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a gas station with a submersible pump skid and a gas refueling method thereof.

[0006] A gas station with a submersible pump skid includes a gas station body, a natural gas storage tank installed inside the gas station body, a gas transmission pipeline connected to the outside of the natural gas storage tank, a first submersible pump skid connected to the outside of the gas transmission pipeline, a natural gas diversion mechanism connected to one end of the gas transmission pipeline, a second submersible pump skid connected to the outside of the natural gas diversion mechanism, a natural gas buffer mechanism connected to the outside of the natural gas buffer mechanism, a gas outlet pipeline connected to the other end of the gas outlet pipeline, and a gas filling cabinet connected to the other end of the gas outlet pipeline. The natural gas diversion mechanism and the natural gas storage tank are connected by a gas transmission pipeline. The first submersible pump skid is connected to the middle of the gas transmission pipeline, and the second submersible pump skid is connected to the connection between the natural gas diversion mechanism and the natural gas buffer mechanism. The outside of the natural gas buffer mechanism is connected to the gas filling cabinet through a gas outlet pipeline. The high-pressure gas inside the natural gas storage tank can enter the natural gas diversion mechanism through the gas pipeline. The first submersible pump skid can initially reduce the pressure of the high-pressure gas passing through the gas pipeline. The natural gas diversion mechanism can guide the incoming gas into the natural gas buffer mechanism. The second submersible pump skid can further reduce the pressure of the gas entering the natural gas buffer mechanism. The natural gas diversion mechanism can divert the gas inside into the natural gas buffer mechanism. The natural gas buffer mechanism can precisely reduce the pressure of the gas and then deliver it to the gas filling cabinet through the gas outlet pipeline. The gas filling cabinet can refuel external equipment.

[0007] Preferably, the natural gas diversion mechanism includes a diversion chamber, the outside of which is connected to a gas transmission pipeline. A diversion layer plate is installed inside the diversion chamber. A diversion sealing block is provided on the top of the diversion layer plate. A diversion limiting block is provided on the outside of the diversion layer plate. A diversion baffle is slidably installed inside the diversion chamber. A transmission connecting rod is connected to the outside of the diversion baffle. An upper connecting pipe is connected to the outside of the diversion chamber. A lower connecting pipe is connected to the outside of the diversion chamber. A spring fixing seat is installed on the top of the upper connecting pipe. A transmission rod buffer spring is installed on the outside of the spring fixing seat.

[0008] Preferably, the outside of the diversion chamber is connected to a gas transmission pipe, an upper connecting pipe, and a lower connecting pipe, and the inside of the diversion chamber is divided into two layers by a diversion layer plate. The upper and lower sides of the right side of the inside of the diversion chamber are connected, the upper left side of the diversion chamber is connected to the upper connecting pipe, and the lower left side of the diversion chamber is connected to the lower connecting pipe. The right side of the diversion chamber is connected to the first submersible pump skid and the natural gas storage tank via a gas pipeline. The left side of the diversion chamber is connected to the natural gas buffer mechanism via an upper connecting pipe and a lower connecting pipe. The diversion chamber is connected to the second submersible pump skid via a lower connecting pipe.

[0009] Preferably, the diversion baffle is slidably installed on the upper inner layer, the diversion limiting block can limit the movement range of the diversion baffle, the top of the diversion sealing block is an inclined structure, the bottom of the diversion baffle is an inclined structure, and the inclination angle of the contact surface of the diversion baffle and the diversion sealing block is the same. When the diversion baffle moves, the gap between the diversion baffle and the diversion sealing block can be adjusted. When the bottom of the diversion baffle contacts the top of the diversion sealing block, it can seal the upper layer inside the diversion chamber.

[0010] Preferably, the transmission connecting rod is slidably connected to the outside of the diversion chamber, one end of the transmission connecting rod is connected to the diversion baffle, and the other end of the transmission connecting rod passes through the center of the spring fixing seat and the transmission rod buffer spring and is connected to the natural gas buffer mechanism. The outside of the spring fixing seat is connected to the outside of the transmission connecting rod through the transmission rod buffer spring. When the diversion baffle moves, it can drive the transmission connecting rod to move synchronously. When the transmission connecting rod moves, it can drive the transmission rod buffer spring to extend or retract.

[0011] Preferably, the natural gas buffer mechanism includes a buffer chamber, the outside of which is connected to an upper connecting pipe and a lower connecting pipe. A buffer partition plate is provided inside the buffer chamber, and a partition plate connecting port is opened inside the buffer partition plate. A diversion sleeve is slidably installed on the top of the buffer partition plate, a lower connecting port is opened at the bottom of the diversion sleeve, and an upper connecting port is opened at the top of the diversion sleeve. A natural gas buffer chamber is connected to the outside of the buffer chamber, and a buffer piston is slidably installed inside the natural gas buffer chamber. A piston connecting rod is connected to the outside of the buffer piston, and a piston limiting spring is installed outside the piston connecting rod. A buffer storage tank is installed on the top of the buffer chamber.

[0012] Preferably, the interior of the buffer chamber is divided into upper and lower layers by a buffer partition, and the upper and lower layers on the left side of the interior of the buffer chamber are connected. The upper layer inside the buffer chamber is connected to the upper layer inside the diversion chamber via an upper connecting pipe, and the lower layer inside the buffer chamber is connected to the lower layer inside the diversion chamber via a lower connecting pipe. The lower layer of the buffer chamber is also connected to the second submersible pump skid via a lower connecting pipe.

[0013] Preferably, the diversion sleeve is slidably installed on the top of the buffer partition plate, the transmission connecting rod passes through the inside of the buffer chamber and connects to the inside of the diversion sleeve, the inside of the diversion sleeve is connected to the lower layer inside the buffer chamber through the lower connecting port and the partition plate connecting port, and the inside of the diversion sleeve is connected to the inside of the buffer storage tank through the upper connecting port. When the transmission connecting rod moves, it can drive the diversion sleeve to move on the top of the buffer partition plate. When the lower connecting port coincides with the connecting port of the partition plate, the interior of the diversion sleeve is connected to the lower layer inside the buffer chamber. When the upper connecting port coincides with the bottom of the buffer storage tank, the interior of the diversion sleeve is connected to the interior of the buffer storage tank.

[0014] Preferably, the buffer piston is slidably mounted inside the natural gas buffer chamber via a piston connecting rod, and the outside of the piston connecting rod is connected to the outside of the natural gas buffer chamber via a piston limiting spring; When the buffer piston moves inside the natural gas buffer chamber, it can drive the piston connecting rod to move synchronously. When the piston connecting rod moves, it can drive the piston limit spring to extend and retract.

[0015] A gas refueling method using a gas station equipped with a submersible pump skid, as described above.

[0016] Compared with the prior art, the present invention provides a gas station with a submersible pump skid and a gas refueling method thereof, which has the following beneficial effects: 1. In this type of gas station equipped with a submersible pump skid, when the natural gas pressure inside the distribution chamber is low, the natural gas only enters the lower connecting pipe through the lower part of the distribution chamber and then enters the natural gas buffer mechanism. When the natural gas pressure inside the distribution chamber is high, it can drive the distribution baffle to move towards the natural gas buffer mechanism. When the distribution baffle moves towards the natural gas buffer mechanism, the gap between the distribution baffle and the distribution sealing block increases, and most of the natural gas enters the natural gas buffer mechanism through the upper connecting pipe. When the natural gas pressure inside the distribution chamber changes, it can drive the distribution baffle to move inside the distribution chamber to divert the natural gas inside the distribution chamber. It can quickly adjust the natural gas pressure inside the distribution chamber, thereby preventing the natural gas from entering the natural gas buffer mechanism due to excessive pressure.

[0017] 2. In this type of gas station equipped with a submersible pump skid, when the transmission connecting rod moves and some natural gas enters the upper part of the buffer tank through the upper connecting pipe, if the overall pressure of the natural gas is high, the diversion sleeve moves towards the buffer storage tank. Excess natural gas enters the interior of the buffer storage tank through the upper connecting port. As the pressure inside the buffer tank gradually decreases, the natural gas is gradually released. If the overall pressure of the natural gas is low, it can enter the lower layer of the buffer tank through the lower connecting port and the partition plate connecting port, and then be discharged from the interior of the buffer tank through the gas outlet pipe. By regulating and storing excess natural gas inside the buffer tank, the pressure of the natural gas entering the gas cabinet can be kept constant, thereby enabling stable gas supply to external equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a gas station with a submersible pump skid according to the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of a gas station with a submersible pump skid according to the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of a gas station with a submersible pump skid according to the present invention. Figure 1 ; Figure 4This is a schematic diagram of the internal structure of a gas station with a submersible pump skid according to the present invention. Figure 2 ; Figure 5 This is a three-dimensional structural schematic diagram of a natural gas diversion mechanism for a gas station with a submersible pump skid according to the present invention. Figure 6 This is a schematic diagram of the internal structure of a natural gas diversion mechanism for a gas station with a submersible pump skid, according to the present invention. Figure 7 This is a schematic diagram of the internal structure of the diversion compartment of a gas station with a submersible pump skid according to the present invention. Figure 8 This is a three-dimensional structural diagram of the diversion compartment of a gas station with a submersible pump skid according to the present invention; Figure 9 This is a three-dimensional structural schematic diagram of a natural gas buffer mechanism for a gas station with a submersible pump skid according to the present invention. Figure 10 This is a schematic diagram of the internal structure of a natural gas buffer mechanism in a gas station with a submersible pump skid, according to the present invention. Figure 11 This is a schematic diagram of the internal structure of the buffer compartment of a gas station with a submersible pump skid according to the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the internal structure of the buffer compartment of a gas station with a submersible pump skid according to the present invention. Figure 2 .

[0019] In the diagram: 1. Gas station main body; 2. Natural gas storage tank; 3. Gas pipeline; 4. First submersible pump skid; 5. Natural gas diversion mechanism; 51. Diversion chamber; 52. Diversion layer plate; 53. Diversion sealing block; 54. Diversion limit block; 55. Diversion baffle; 56. Transmission connecting rod; 57. Upper connecting pipe; 58. Lower connecting pipe; 59. Spring fixing seat; 510. Transmission rod buffer spring; 6. Second submersible pump skid; 7. Natural gas buffer mechanism; 71. Buffer chamber; 72. Buffer partition plate; 73. Partition plate connection port; 74. Diversion sleeve; 75. Lower connection port; 76. Upper connection port; 77. Natural gas buffer chamber; 78. Buffer piston; 79. Piston connecting rod; 710. Piston limit spring; 711. Buffer storage tank; 8. Gas outlet pipeline; 9. Gas filling cabinet. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a gas station with a submersible pump skid and a gas refueling method thereof.

[0022] Example 1 Please see Figure 1 - Figure 12 A gas station with a submersible pump skid includes a gas station body 1, a natural gas storage tank 2 installed inside the gas station body 1, a gas transmission pipeline 3 connected to the outside of the natural gas storage tank 2, a first submersible pump skid 4 connected to the outside of the gas transmission pipeline 3, a natural gas diversion mechanism 5 connected to one end of the gas transmission pipeline 3, a second submersible pump skid 6 connected to the outside of the natural gas diversion mechanism 5, a natural gas buffer mechanism 7 connected to the outside of the natural gas buffer mechanism 7, an outlet pipe 8 connected to the outside of the outlet pipe 8, and a gas cabinet 9 connected to the other end of the outlet pipe 8. The natural gas diversion mechanism 5 and the natural gas storage tank 2 are connected by a gas transmission pipeline 3. The first submersible pump skid 4 is connected to the middle of the gas transmission pipeline 3. The second submersible pump skid 6 is connected to the connection between the natural gas diversion mechanism 5 and the natural gas buffer mechanism 7. The outside of the natural gas buffer mechanism 7 is connected to the gas filling cabinet 9 through the gas outlet pipeline 8. The high-pressure gas inside the natural gas storage tank 2 can enter the natural gas diversion mechanism 5 through the gas transmission pipeline 3. The first submersible pump skid 4 can initially reduce the pressure of the high-pressure gas passing through the gas transmission pipeline 3. The natural gas diversion mechanism 5 can guide the incoming gas into the natural gas buffer mechanism 7. The second submersible pump skid 6 can perform secondary pressure reduction on the gas entering the natural gas buffer mechanism 7. The natural gas diversion mechanism 5 can divert the gas inside into the natural gas buffer mechanism 7. The natural gas buffer mechanism 7 can accurately reduce the pressure of the gas and then deliver it to the gas filling cabinet 9 through the gas outlet pipeline 8. The gas filling cabinet 9 can refuel external equipment.

[0023] During operation, the high-pressure natural gas inside the natural gas storage tank 2 enters the natural gas diversion mechanism 5 through the gas transmission pipeline 3. As the high-pressure natural gas passes through the gas transmission pipeline 3, the first submersible pump skid 4 releases the pressure, thus reducing the natural gas pressure. The natural gas diversion mechanism 5 can divert the natural gas according to its pressure. After entering the natural gas diversion mechanism 5, most of the natural gas flows through the lower part of the mechanism into the natural gas buffer mechanism 7, while some flows through the upper part. The natural gas entering the buffer mechanism 7 from the lower part of the diversion mechanism 5 can then undergo secondary diversion via the second submersible pump skid 6. The pressure release prevents the natural gas pressure from becoming too high. After the natural gas enters the natural gas buffer mechanism 7, the buffer mechanism 7 can balance the pressure of the natural gas and regulate its temperature. When the pressure of the natural gas entering the natural gas buffer mechanism 7 is too high, the buffer mechanism 7 can temporarily store the excess natural gas and gradually release it during subsequent refueling, thereby ensuring the balance of natural gas refueling. By storing natural gas in layers and temporarily storing and slowly releasing excess natural gas, the natural gas enters the refueling cabinet 9 through the outlet pipe 8 after passing through the natural gas buffer mechanism 7. The refueling cabinet 9 can then add natural gas to external equipment, thereby effectively reducing the dependence on the use of submersible pump skids and thus reducing costs.

[0024] Example 2 The difference from the above embodiments is that, please refer to [link / reference needed]. Figure 1 - Figure 12 The natural gas diversion mechanism 5 includes a diversion chamber 51, which is connected to the gas transmission pipeline 3. A diversion layer plate 52 is installed inside the diversion chamber 51. A diversion sealing block 53 is provided on the top of the diversion layer plate 52. A diversion limiting block 54 is provided on the outside of the diversion layer plate 52. A diversion baffle 55 is slidably installed inside the diversion chamber 51. A transmission connecting rod 56 is connected to the outside of the diversion baffle 55. An upper connecting pipe 57 and a lower connecting pipe 58 are connected to the outside of the diversion chamber 51. A spring fixing seat 59 is installed on the top of the upper connecting pipe 57. A transmission rod buffer spring 510 is installed on the outside of the spring fixing seat 59.

[0025] The outside of the diversion chamber 51 is connected to the gas transmission pipe 3, the upper connecting pipe 57 and the lower connecting pipe 58 respectively. The inside of the diversion chamber 51 is divided into two layers by the diversion layer plate 52. The upper and lower sides of the right side of the inside of the diversion chamber 51 are connected. The upper left side of the diversion chamber 51 is connected to the upper connecting pipe 57, and the lower left side of the diversion chamber 51 is connected to the lower connecting pipe 58. The right side of the diversion chamber 51 is connected to the first submersible pump skid 4 and the natural gas storage tank 2 via the gas transmission pipe 3. The left side of the diversion chamber 51 is connected to the natural gas buffer mechanism 7 via the upper connecting pipe 57 and the lower connecting pipe 58. The diversion chamber 51 is connected to the second submersible pump skid 6 via the lower connecting pipe 58.

[0026] The diversion baffle 55 is slidably installed in the upper inner layer. The diversion limiting block 54 can limit the movement range of the diversion baffle 55. The top of the diversion sealing block 53 is an inclined structure, the bottom of the diversion baffle 55 is an inclined structure, and the inclination angle of the contact surface of the diversion baffle 55 and the diversion sealing block 53 is the same. When the diversion baffle 55 moves, the gap between the diversion baffle 55 and the diversion sealing block 53 can be adjusted. When the bottom of the diversion baffle 55 contacts the top of the diversion sealing block 53, it can seal the upper layer inside the diversion chamber 51.

[0027] The transmission connecting rod 56 is slidably connected to the outside of the diversion chamber 51. One end of the transmission connecting rod 56 is connected to the diversion baffle 55. The other end of the transmission connecting rod 56 passes through the center of the spring fixing seat 59 and the transmission rod buffer spring 510 and is connected to the natural gas buffer mechanism 7. The outside of the spring fixing seat 59 is connected to the outside of the transmission connecting rod 56 through the transmission rod buffer spring 510. When the diversion baffle 55 moves, it can drive the transmission connecting rod 56 to move synchronously. When the transmission connecting rod 56 moves, it can drive the transmission rod buffer spring 510 to extend or retract.

[0028] During operation, the first submersible pump skid 4 releases the pressure of natural gas passing through the gas pipeline 3 and then enters the distribution chamber 51. After entering the distribution chamber 51, the pressure of the natural gas inside the chamber determines the movement of the distribution baffle 55 within the chamber. When the pressure of the natural gas inside the distribution chamber 51 is low, the natural gas only enters the lower connecting pipe 58 through the lower part of the distribution chamber 51, and then enters the natural gas buffer mechanism 7. When the pressure of the natural gas inside the distribution chamber 51 is high, it can move the distribution baffle 55 towards the natural gas buffer mechanism 7. As the distribution baffle 55 moves towards the natural gas buffer mechanism 7, the gap between the distribution baffle 55 and the distribution sealing block 53 increases, and most of the natural gas enters the natural gas buffer mechanism 7 through the upper connecting pipe 57. When the baffle 55 moves, it can drive the transmission connecting rod 56 to move synchronously. When the transmission connecting rod 56 moves towards the natural gas buffer mechanism 7, it can compress the transmission rod buffer spring 510. As the natural gas in the natural gas storage tank 2 gradually decreases, the pressure of the natural gas entering the natural gas diversion mechanism 5 will also gradually decrease. At this time, the transmission rod buffer spring 510 rebounds and drives the diversion baffle 55 to move towards the gas pipeline 3, so that the bottom of the diversion baffle 55 contacts the top of the diversion sealing block 53 to seal the upper part of the diversion chamber 51. The pressure change of the natural gas inside the diversion chamber 51 drives the diversion baffle 55 to move inside the diversion chamber 51 to divert the natural gas inside the diversion chamber 51. It can quickly adjust the pressure of the natural gas inside the diversion chamber 51, thereby preventing the natural gas from entering the natural gas buffer mechanism 7 due to excessive pressure.

[0029] Example 3 The difference from the above embodiments is that, please refer to [link / reference needed]. Figure 1 - Figure 12 The natural gas buffer mechanism 7 includes a buffer chamber 71, which is connected to an upper connecting pipe 57 and a lower connecting pipe 58. A buffer partition plate 72 is provided inside the buffer chamber 71. A partition plate connecting port 73 is opened inside the buffer partition plate 72. A diversion sleeve 74 is slidably installed on the top of the buffer partition plate 72. A lower connecting port 75 is opened at the bottom of the diversion sleeve 74. An upper connecting port 76 is opened at the top of the diversion sleeve 74. A natural gas buffer chamber 77 is connected to the outside of the buffer chamber 71. A buffer piston 78 is slidably installed inside the natural gas buffer chamber 77. A piston connecting rod 79 is connected to the outside of the buffer piston 78. A piston limit spring 710 is installed on the outside of the piston connecting rod 79. A buffer storage tank 711 is installed on the top of the buffer chamber 71.

[0030] The interior of the buffer chamber 71 is divided into upper and lower layers by a buffer partition 72, and the upper and lower layers on the left side of the interior of the buffer chamber 71 are connected. The upper layer inside the buffer chamber 71 is connected to the upper layer inside the diversion chamber 51 through the upper connecting pipe 57, the lower layer inside the buffer chamber 71 is connected to the lower layer inside the diversion chamber 51 through the lower connecting pipe 58, and the lower layer inside the buffer chamber 71 is connected to the second submersible pump skid 6 through the lower connecting pipe 58.

[0031] The diversion sleeve 74 is slidably installed on the top of the buffer partition plate 72. The transmission connecting rod 56 passes through the inside of the buffer chamber 71 and connects to the inside of the diversion sleeve 74. The inside of the diversion sleeve 74 is connected to the lower layer inside the buffer chamber 71 through the lower connecting port 75 and the partition plate connecting port 73. The inside of the diversion sleeve 74 is connected to the inside of the buffer storage tank 711 through the upper connecting port 76. When the transmission connecting rod 56 moves, it can drive the diversion sleeve 74 to move on the top of the buffer partition plate 72. When the lower connecting port 75 coincides with the partition plate connecting port 73, the interior of the diversion sleeve 74 is connected to the lower layer inside the buffer chamber 71. When the upper connecting port 76 coincides with the bottom of the buffer storage tank 711, the interior of the diversion sleeve 74 is connected to the interior of the buffer storage tank 711.

[0032] The buffer piston 78 is slidably mounted inside the natural gas buffer chamber 77 via the piston connecting rod 79, and the outside of the piston connecting rod 79 is connected to the outside of the natural gas buffer chamber 77 via the piston limiting spring 710. When the buffer piston 78 moves inside the natural gas buffer chamber 77, it can drive the piston connecting rod 79 to move synchronously. When the piston connecting rod 79 moves, it can drive the piston limit spring 710 to extend and retract.

[0033] During operation, natural gas, depressurized by the second submersible pump skid 6, enters the buffer chamber 71 through the lower connecting pipe 58. When the natural gas pressure inside the buffer chamber 71 is high, it can drive the buffer piston 78 to move towards the outlet pipe 8. When the piston connecting rod 79 moves towards the outlet pipe 8, it can increase the volume of the part of the natural gas buffer chamber 77 connected to the buffer chamber 71. The movement of the buffer piston 78 towards the outlet pipe 8 can drive the piston connecting rod 79 to move synchronously. When the piston moves in the direction of 8, the piston limiting spring 710 extends. During operation, as the pressure inside the buffer chamber 71 gradually decreases, the piston limiting spring 710 rebounds, causing the buffer piston 78 to move into the buffer chamber 71. At this time, the volume of the part connecting the natural gas buffer chamber 77 and the buffer chamber 71 decreases. When the transmission connecting rod 56 moves, it can drive the diversion sleeve 74 to move synchronously inside the buffer chamber 71. When the buffer chamber 71 moves towards the buffer storage tank 711, the inside of the diversion sleeve 74 is connected through the upper connecting port. 76 is connected to the interior of buffer storage tank 711. When the diverting sleeve 74 moves towards the upper connecting pipe 57, the interior of the diverting sleeve 74 is connected to the lower layer of the buffer chamber 71 through the lower connecting port 75 and the partition plate connecting port 73. When the transmission connecting rod 56 moves to allow some natural gas to enter the upper part of the buffer chamber 71 through the upper connecting pipe 57, if the overall pressure of the natural gas is large, the diverting sleeve 74 moves towards the buffer storage tank 711, and the excess natural gas enters the buffer storage tank 71 through the upper connecting port 76. The natural gas entering the buffer storage tank 711 can be gradually released as the internal pressure of the buffer chamber 71 gradually decreases. If the overall pressure of the natural gas is low, it can enter the lower layer of the buffer chamber 71 through the lower connecting port 75 and the partition plate connecting port 73, and then be discharged from the inside of the buffer chamber 71 through the gas outlet pipe 8. By regulating and storing excess natural gas inside the buffer chamber 71, the pressure of the natural gas entering the gas filling cabinet 9 can be kept constant, thereby enabling stable gas filling of external equipment.

[0034] A gas refueling method, using a gas refueling station with a submersible pump skid as described in Examples 1 to 3, includes the following steps: During operation, the high-pressure natural gas inside the natural gas storage tank 2 can enter the natural gas diversion mechanism 5 through the gas pipeline 3; The first submersible pump skid 4 can initially depressurize the high-pressure gas passing through the gas pipeline 3. The natural gas diversion mechanism 5 can divert natural gas according to the pressure of the incoming natural gas and guide it into the natural gas buffer mechanism 7. The second submersible pump skid 6 can perform secondary depressurization on the gas entering the natural gas buffer mechanism 7; The natural gas buffer unit 7 can precisely depressurize the gas and then deliver it through the gas outlet pipe 8 to the gas filling cabinet 9 to refuel external equipment.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas station with a submersible pump skid, comprising a main body of the gas station, characterized in that: The gas station's main body is equipped with a natural gas storage tank. The natural gas storage tank is connected to a gas transmission pipeline. The gas transmission pipeline is connected to a first submersible pump skid. One end of the gas transmission pipeline is connected to a natural gas diversion mechanism. The natural gas diversion mechanism is connected to a second submersible pump skid. The natural gas diversion mechanism is connected to a natural gas buffer mechanism. The natural gas buffer mechanism is connected to an outlet pipe. The other end of the outlet pipe is connected to a gas filling cabinet. The natural gas diversion mechanism and the natural gas storage tank are connected by a gas transmission pipeline. The first submersible pump skid is connected to the middle of the gas transmission pipeline, and the second submersible pump skid is connected to the connection between the natural gas diversion mechanism and the natural gas buffer mechanism. The outside of the natural gas buffer mechanism is connected to the gas filling cabinet through a gas outlet pipeline. The high-pressure gas inside the natural gas storage tank can enter the natural gas diversion mechanism through the gas pipeline. The first submersible pump skid can initially reduce the pressure of the high-pressure gas passing through the gas pipeline. The natural gas diversion mechanism can guide the incoming gas into the natural gas buffer mechanism. The second submersible pump skid can further reduce the pressure of the gas entering the natural gas buffer mechanism. The natural gas diversion mechanism can divert the gas inside into the natural gas buffer mechanism. The natural gas buffer mechanism can precisely reduce the pressure of the gas and then deliver it to the gas filling cabinet through the gas outlet pipeline. The gas filling cabinet can refuel external equipment.

2. A gas station with a submersible pump skid according to claim 1, characterized in that: The natural gas diversion mechanism includes a diversion chamber, the exterior of which is connected to a gas transmission pipeline. A diversion layer plate is installed inside the diversion chamber. A diversion sealing block is located on the top of the diversion layer plate, and a diversion limiting block is located on the exterior of the diversion layer plate. A diversion baffle is slidably installed inside the diversion chamber. A transmission connecting rod is connected to the exterior of the diversion baffle. An upper connecting pipe and a lower connecting pipe are connected to the exterior of the diversion chamber. A spring fixing seat is installed on the top of the upper connecting pipe, and a transmission rod buffer spring is installed on the exterior of the spring fixing seat.

3. A gas station with a submersible pump skid according to claim 2, characterized in that: The outside of the diversion chamber is connected to a gas transmission pipe, an upper connecting pipe, and a lower connecting pipe. The inside of the diversion chamber is divided into two layers by a diversion layer plate. The upper and lower sides of the right side of the inside of the diversion chamber are connected. The upper left layer of the diversion chamber is connected to the upper connecting pipe, and the lower left layer of the diversion chamber is connected to the lower connecting pipe. The right side of the diversion chamber is connected to the first submersible pump skid and the natural gas storage tank via a gas pipeline. The left side of the diversion chamber is connected to the natural gas buffer mechanism via an upper connecting pipe and a lower connecting pipe. The diversion chamber is connected to the second submersible pump skid via a lower connecting pipe.

4. A gas station with a submersible pump skid according to claim 3, characterized in that: The diversion baffle is slidably installed on the upper inner layer. The diversion limiting block can limit the movement range of the diversion baffle. The top of the diversion sealing block is an inclined structure, and the bottom of the diversion baffle is an inclined structure. The inclination angles of the contact surfaces of the diversion baffle and the diversion sealing block are the same. When the diversion baffle moves, the gap between the diversion baffle and the diversion sealing block can be adjusted. When the bottom of the diversion baffle contacts the top of the diversion sealing block, it can seal the upper layer inside the diversion chamber.

5. A gas station with a submersible pump skid according to claim 4, characterized in that: The transmission connecting rod is slidably connected to the outside of the diversion chamber. One end of the transmission connecting rod is connected to the diversion baffle. The other end of the transmission connecting rod passes through the center of the spring fixing seat and the transmission rod buffer spring and is connected to the natural gas buffer mechanism. The outside of the spring fixing seat is connected to the outside of the transmission connecting rod through the transmission rod buffer spring. When the diversion baffle moves, it can drive the transmission connecting rod to move synchronously. When the transmission connecting rod moves, it can drive the transmission rod buffer spring to extend or retract.

6. A gas station with a submersible pump skid according to claim 5, characterized in that: The natural gas buffer mechanism includes a buffer chamber, the outside of which is connected to an upper connecting pipe and a lower connecting pipe. A buffer partition plate is installed inside the buffer chamber, with a partition plate connecting port inside. A diversion sleeve is slidably installed on the top of the buffer partition plate, with a lower connecting port at the bottom and an upper connecting port at the top. A natural gas buffer chamber is connected to the outside of the buffer chamber, and a buffer piston is slidably installed inside the natural gas buffer chamber. A piston connecting rod is connected to the outside of the buffer piston, and a piston limiting spring is installed outside the piston connecting rod. A buffer storage tank is installed on the top of the buffer chamber.

7. A gas station with a submersible pump skid according to claim 6, characterized in that: The interior of the buffer chamber is divided into upper and lower layers by a buffer partition plate, and the upper and lower layers on the left side of the buffer chamber are connected. The upper layer inside the buffer chamber is connected to the upper layer inside the diversion chamber via an upper connecting pipe, and the lower layer inside the buffer chamber is connected to the lower layer inside the diversion chamber via a lower connecting pipe. The lower layer of the buffer chamber is also connected to the second submersible pump skid via a lower connecting pipe.

8. A gas station with a submersible pump skid according to claim 7, characterized in that: The diversion sleeve is slidably installed on the top of the buffer partition plate. The transmission connecting rod passes through the inside of the buffer chamber and connects to the inside of the diversion sleeve. The inside of the diversion sleeve is connected to the lower layer inside the buffer chamber through the lower connecting port and the connecting port of the partition plate. The inside of the diversion sleeve is connected to the inside of the buffer storage tank through the upper connecting port. When the transmission connecting rod moves, it can drive the diversion sleeve to move on the top of the buffer partition plate. When the lower connecting port coincides with the connecting port of the partition plate, the interior of the diversion sleeve is connected to the lower layer inside the buffer chamber. When the upper connecting port coincides with the bottom of the buffer storage tank, the interior of the diversion sleeve is connected to the interior of the buffer storage tank.

9. A gas station with a submersible pump skid according to claim 8, characterized in that: The buffer piston is slidably installed inside the natural gas buffer chamber via a piston connecting rod, and the outside of the piston connecting rod is connected to the outside of the natural gas buffer chamber via a piston limiting spring. When the buffer piston moves inside the natural gas buffer chamber, it can drive the piston connecting rod to move synchronously. When the piston connecting rod moves, it can drive the piston limit spring to extend and retract.

10. A method for adding gas, characterized in that, A gas station using a submersible pump skid as described in any one of claims 1-9 includes the following steps; During operation, the high-pressure natural gas inside the natural gas storage tank can enter the natural gas distribution mechanism through the gas pipeline; The first submersible pump skid can initially depressurize the high-pressure gas passing through the gas pipeline. The natural gas diversion mechanism can divert natural gas according to the pressure of the incoming natural gas and guide it into the natural gas buffer mechanism. The second submersible pump skid can perform secondary depressurization of the gas entering the natural gas buffer unit; The natural gas buffer unit can precisely depressurize the gas before delivering it through the outlet pipe to the gas filling tank to refuel external equipment.

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