Process for pressurizing and extracting pressure between tank car and propane storage tank

Abstract

The invention relates to a pressurizing and pressure-pumping process between a tank car and a propane storage tank. The pressurizing and pressure-pumping process comprises the following steps: step 1, treating residual liquid of the storage tank; 2, checking the storage tank before filling; step three, propane pressurization and pressure extraction; step 4, checking after filling; step 5, marking and storing; in the first step, when residual liquid in a steel cylinder reaches 1 kg, residual liquid pouring treatment needs to be conducted, the residual liquid is poured into a residual liquid tank through a positive pressure method, the pressure difference between a high-pressure gas phase pipe and the residual liquid tank is checked, when the pressure difference reaches 2 kg / , residual liquid pouring is started, and the residual liquid is jacked back into the residual liquid tank through high-pressure gas in the cylinder till the residual liquid is completely discharged; the unloading process is improved, the residual gas phase in the tank car can be pumped into the tank car, and the problem that the residual gas phase of the tank car is emptied is solved; and the pipeline clamping assembly is adopted, the lengthened conveying pipeline can be clamped and fixed, winding of the pipeline is avoided, propane conveying is facilitated, and the propane conveying effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of propane pressurization and extraction, in particular to a pressurization and extraction process between a tank truck and a propane storage tank. Background Art

[0002] Liquefied gas tank trucks, also known as LPG transport trucks, are special vehicles used to transport liquefied gases such as propane, propylene, dimethyl ether, liquid ammonia, methylamine, and acetaldehyde. The main function of propane storage tanks is to store propane so that it can be supplied to industrial equipment or households when needed. When transporting propane, the tank truck and the propane storage tank can form a pressure difference by pressurizing and pumping out pressure to enable the transport of propane. However, the existing pressurization and pumping process between the tank truck and the propane storage tank generally discharges the remaining gas phase in the tank truck into the atmosphere through venting after unloading the propane liquid phase. This is both unsafe and wasteful. Summary of the Invention

[0003] The problem solved by the present invention is to provide a pressurization and pressure reduction process between the tank truck and the propane storage tank. Through technical breakthroughs, the unloading process is improved, and the remaining gas phase in the tank truck can be pumped into the tank truck, solving the problem of venting the remaining gas phase in the tank truck.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: a process for pressurizing and depressurizing a tank truck and a propane storage tank, comprising the following steps: step 1, treating residual liquid in the tank; step 2, inspecting the tank before filling; step 3, pressurizing and depressurizing the propane; step 4, inspecting after filling; and step 5, marking for storage.

[0005] In step 1, when the residual liquid in the cylinder reaches 1 kg, it is necessary to empty the residual liquid. Pour the residual liquid into the residual liquid tank by positive pressure. Check the pressure difference between the high-pressure gas phase pipe and the residual liquid tank. When the pressure difference reaches 2 kg / h, start emptying the residual liquid. Use the high-pressure gas in the bottle to push the residual liquid back into the residual liquid tank until the residual liquid is emptied.

[0006] In step 2, the gas cylinders are inspected before filling, including the production date, factory number, manufacturer, inspection cycle, etc. of the gas cylinders. Expired gas cylinders or gas cylinders with defects in appearance are inspected and only those that pass the inspection can be filled;

[0007] In step three, during unloading, the gas phase in the storage tank is pressurized to the tank truck through the circulation compressor, forming a pressure difference of 0.2-0.5 MPa, so that the pressure of the tank truck is greater than the pressure of the storage tank. The propane in the tank truck automatically flows into the storage tank through the pressure difference. When the liquid phase of the tank truck is unloaded, the inlet and outlet directions of the circulation compressor are adjusted to pump the propane gas phase in the tank truck into the storage tank, and the propane in the tank truck can be completely pumped out.

[0008] In step 4, after filling, the gas cylinder is leak-checked and reweighed to ensure there are no leaks or overfilling.

[0009] In step five, the gas tanks that pass the inspection are marked and then stored.

[0010] Preferably, in step 5, the place where propane is stored should be kept cool, well-ventilated, and away from fire and heat sources; the storage temperature should not exceed 30°C, and it should be stored separately from oxidants, halogens, etc., and should not be mixed.

[0011] Preferably, in step three, the tank truck includes a tank truck body, a pipe clamping assembly, a gas pipe, a gas joint assembly and a protective cover. A pipe clamping assembly is installed on the outer wall of one side of the tank truck body. The tank truck body is connected with a gas pipe, and a gas joint assembly is installed on the outer wall of the end of the gas pipe. A protective cover is fixedly connected to the outer wall of one side of the tank truck body, and the protective cover is sleeved on the outer wall of the gas pipe.

[0012] The transmission mechanism that this sliding part is connected with this sliding part has the shape of a wheel, and this wheel is arranged on the track of the wheel hub, and this wheel hub is arranged on the track of the wheel hub, and this wheel hub is arranged on the track of the wheel hub.

[0013] Preferably, the gas joint assembly includes a valve, a fixing ring, a threaded sleeve, a slip ring, a sealing gasket and a buckle. The valve is installed on the gas pipe, a fixing ring is fixedly connected to the outer wall of one side of the gas pipe, a slip ring is slidably connected to the outer wall of one side of the fixing ring, a threaded sleeve is fixedly connected to the outer wall of one side of the slip ring, a sealing gasket is fixedly connected to the inner wall of one side of the threaded sleeve, and a buckle is symmetrically fixedly connected to the outer wall of one side of the threaded sleeve.

[0014] Preferably, a circulating compressor is installed on the inner wall of the bottom end of the tank truck body, and one end of the output pipe of the circulating compressor is connected to the outer wall of the gas pipeline.

[0015] Preferably, a temperature regulator is installed on one inner wall of the tank truck body, and the electrical output end of the tank truck body is electrically connected to the electrical input end of the temperature regulator.

[0016] Preferably, the spring is sleeved on the outer wall of the moving rod.

[0017] Preferably, the inner wall of one side of the sealing gasket is sealed to the outer wall of the gas pipe, and the sealing gasket is in the shape of a circular ring.

[0018] The beneficial effects of the present invention are as follows: through technical research and improvement of the unloading process, the remaining gas phase in the tank car can be pumped into the tank car, thus solving the problem of emptying the remaining gas phase in the tank car;

[0019] The pipe clamping assembly is used to clamp and fix the extended delivery pipe to avoid pipe entanglement, facilitate propane delivery, and improve the propane delivery effect;

[0020] The gas transmission joint assembly is used to quickly connect the pipeline joints, simplify the connection process, and improve the propane transmission effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a process flow chart of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the tank car of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the other side of the tank car of the present invention;

[0024] Figure 4 This is a three-dimensional diagram of the internal structure of the tank car of the present invention;

[0025] Figure 5 It is a side cutaway structural diagram of the tank car of the present invention;

[0026] Figure 6 For the present invention Figure 5 A magnified view of the structure in area A.

[0027] Legend:

[0028] 1. Tank truck body; 2. Pipe clamping assembly; 3. Gas pipe; 4. Gas joint assembly; 5. Protective cover; 6. Circulating compressor; 7. Temperature regulator; 201. Motor; 202. Elliptical wheel; 203. Connecting ring; 204. Guide hole; 205. Pipe pad; 206. Moving plate; 207. Clamping arc plate; 208. Moving rod; 209. Connecting plate; 2010. Spring; 2011. Extrusion arc plate; 401. Valve; 402. Fixing ring; 403. Threaded sleeve; 404. Slip ring; 405. Sealing gasket; 406. Buckle. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1 The process of pressurizing and depressurizing between the tank truck and the propane storage tank includes the following steps:

[0032] Step 1: Dispose of residual liquid in the storage tank; Step 2: Check the storage tank before filling; Step 3: Pressurize and pump out the propane; Step 4: Check after filling; Step 5: Mark and store;

[0033] In step 1, when the residual liquid in the cylinder reaches 1 kg, it is necessary to empty the residual liquid. Pour the residual liquid into the residual liquid tank by positive pressure. Check the pressure difference between the high-pressure gas phase pipe and the residual liquid tank. When the pressure difference reaches 2 kg / h, start emptying the residual liquid. Use the high-pressure gas in the bottle to push the residual liquid back into the residual liquid tank until the residual liquid is emptied.

[0034] In step 2, the gas cylinders are inspected before filling, including the production date, factory number, manufacturer, inspection cycle, etc. of the gas cylinders. Expired gas cylinders or gas cylinders with defects in appearance are inspected and only those that pass the inspection can be filled;

[0035] In step three, during unloading, the gas phase in the storage tank is pressurized to the tank truck through the circulation compressor, forming a pressure difference of 0.2-0.5 MPa, so that the pressure of the tank truck is greater than the pressure of the storage tank. The propane in the tank truck automatically flows into the storage tank through the pressure difference. When the liquid phase of the tank truck is unloaded, the inlet and outlet directions of the circulation compressor are adjusted to pump the propane gas phase in the tank truck into the storage tank, and the propane in the tank truck can be completely pumped out.

[0036] In step 4, after filling, the gas cylinder is leak-checked and reweighed to ensure there are no leaks or overfilling.

[0037] In step five, mark the gas tanks that have passed the inspection and then store them; in step five, the place where propane is stored should be kept cool, well-ventilated, and away from fire and heat sources; the storage temperature should not exceed 30°C, and it should be stored separately from oxidants, halogens, etc., and must not be mixed.

[0038] Example 2

[0039] See also Figures 2 to 5In step three, the tank truck includes a tank truck body 1, a pipe clamping assembly 2, a gas pipe 3, a gas joint assembly 4 and a protective cover 5. A pipe clamping assembly 2 is installed on the outer wall of one side of the tank truck body 1, and the gas pipe 3 is connected to the tank truck body 1. The gas joint assembly 4 is installed on the outer wall of the end of the gas pipe 3. A protective cover 5 is fixedly connected to the outer wall of the tank truck body 1, and the inner sleeve of the protective cover 5 is connected to the outer wall of the gas pipe 3; a circulating compressor 6 is installed on the inner wall of the bottom end of the tank truck body 1, and one end of the output pipe of the circulating compressor 6 is connected to the outer wall of the gas pipe 3. Starting the circulating compressor 6 forms a pressure difference in the tank truck body 1, so that propane is transported through the gas pipe 3; a temperature regulator 7 is installed on the inner wall of one side of the tank truck body 1, and the electrical output end of the tank truck body 1 is electrically connected to the electrical input end of the temperature regulator 7. Starting the temperature regulator 7 adjusts the temperature in the tank truck body 1 to store propane;

[0040] The pipe clamping assembly 2 includes a motor 201, an elliptical wheel 202, a connecting ring 203, a guide hole 204, a pipe pad 205, a movable plate 206, a clamping arc plate 207, a movable rod 208, a connecting disk 209, a spring 2010 and an extrusion arc plate 2011. A connecting ring 203 is fixedly connected to the outer wall of one side of the tank truck body 1, and a pipe pad 205 is fixedly connected to the outer wall of one side of the connecting ring 203, and one side of the gas pipe 3 is placed on the inner wall of the pipe pad 205. A clamping arc plate 207 is distributed and fitted on one side of the gas pipe 3, and a movable plate 206 is fixedly connected to the outer wall of one side of the clamping arc plate 207. One side of the three movable plates 206 is fixedly connected to a movable rod 208. A guide hole 204 is distributed on the connecting ring 203 corresponding to the position of the movable rod 208. The movable rod 2 A connecting disk 209 is fixedly connected to the outer wall of one end of 08, and a spring 2010 is fixedly connected to the connecting disk 209, and the other end of the spring 2010 is fixedly connected to the outer wall of the connecting ring 203, and one side of the two clamping arc plates 207 is fixedly connected to the extrusion arc plate 2011, and one side of the two extrusion arc plates 2011 is fit-connected with the elliptical wheel 202, and a motor 201 is embedded and installed on one side of the tank car body 1, and one end of the output shaft of the motor 201 is fixedly connected to the outer wall of the elliptical wheel 202; the spring 2010 is sleeved on the outer wall of the moving rod 208, so that the flat part of the elliptical wheel 202 contacts the extrusion arc plate 2011, and then under the action of the spring 2010 on the connecting disk 209, the moving rod 208 on the moving plate 206 moves along the guide hole 204 on the connecting ring 203.

[0041] Working principle: When propane needs to be delivered, the motor 201 is started to rotate the elliptical wheel 202 90 degrees, so that the flat part of the elliptical wheel 202 contacts the extrusion arc plate 2011, and then under the action of the spring 2010 on the connecting plate 209, the moving rod 208 on the moving plate 206 moves along the guide hole 204 on the connecting ring 203, so that the clamping arc plate 207 moves, thereby releasing the clamping of the gas pipe 3, and then taking the gas pipe 3 out of the pipe pad 205, and then delivering the propane to After the storage tank is built, the gas pipe 3 is placed inside the pipe pad 205. At this time, the motor 201 is started to rotate the elliptical wheel 202. The extrusion arc plate 2011 is squeezed through the raised part of the elliptical wheel 202, so that the moving rod 208 on the moving plate 206 is reset along the guide hole 204 on the connecting ring 203. Then the gas pipe 3 is clamped and fixed by the clamping arc plate 207. The extended delivery pipeline can be clamped and fixed to avoid the pipeline from being entangled, facilitate the delivery of propane, and improve the delivery effect of propane.

[0042] Example 3

[0043] See also Figures 5 and 6 The gas joint assembly 4 includes a valve 401, a fixing ring 402, a threaded sleeve 403, a slip ring 404, a sealing gasket 405 and a buckle 406. The valve 401 is installed on the gas pipe 3. The fixing ring 402 is fixedly connected to the outer wall of one side of the gas pipe 3. The slip ring 404 is slidably connected to the outer wall of one side of the fixing ring 402. The threaded sleeve 403 is fixedly connected to the outer wall of one side of the slip ring 404. The sealing gasket 405 is fixedly connected to the inner wall of one side of the threaded sleeve 403. The buckle 406 is symmetrically fixedly connected to the outer wall of one side of the threaded sleeve 403; the inner wall of one side of the sealing gasket 405 is sealed and connected to the outer wall of the gas pipe 3, and the sealing gasket 405 is in the shape of a circular ring. The connection is sealed by the sealing gasket 405, and then the valve 401 is opened to allow propane to be injected into the storage tank through the gas pipe 3 through the pressure difference.

[0044] When transporting propane, first insert the gas pipe 3 into the tank interface, then screw the threaded sleeve 403 to make the slip ring 404 on the threaded sleeve 403 rotate along the fixing ring 402, so that the gas pipe 3 is fixed to the tank interface, and the connection is sealed by the sealing gasket 405. Then, open the valve 401, and the propane is injected into the tank through the gas pipe 3 through the pressure difference. The pipe joints can be quickly connected, which simplifies the connection process and improves the propane transportation effect.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. The process of pressurizing and depressurizing between the tank truck and the propane storage tank is characterized in that: The following steps are involved: Step 1: Dispose of residual liquid in the storage tank; Step 2: Check the storage tank before filling; Step 3: Pressurize and pump out the propane; Step 4: Check after filling; Step 5: Mark and store; In step 1, when the residual liquid in the cylinder reaches 1 kg, it is necessary to empty the residual liquid. Pour the residual liquid into the residual liquid tank by positive pressure. Check the pressure difference between the high-pressure gas phase pipe and the residual liquid tank. When the pressure difference reaches 2 kg / h, start emptying the residual liquid. Use the high-pressure gas in the bottle to push the residual liquid back into the residual liquid tank until the residual liquid is emptied. In step 2, the gas cylinders are inspected before filling, including the production date, factory number, manufacturer, inspection cycle, etc. of the gas cylinders. Expired gas cylinders or gas cylinders with defects in appearance are inspected and only those that pass the inspection can be filled; In step three, during unloading, the gas phase in the storage tank is pressurized to the tank truck through the circulation compressor, forming a pressure difference of 0.2-0.5 MPa, so that the pressure of the tank truck is greater than the pressure of the storage tank. The propane in the tank truck automatically flows into the storage tank through the pressure difference. When the liquid phase of the tank truck is unloaded, the inlet and outlet directions of the circulation compressor are adjusted to pump the propane gas phase in the tank truck into the storage tank, and the propane in the tank truck can be completely pumped out. In step 4, after filling, the gas cylinder is leak-checked and reweighed to ensure there are no leaks or overfilling. In step five, the gas tanks that pass the inspection are marked and then stored.

2. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 1, characterized in that: In step 5, the place where propane is stored should be kept cool, well-ventilated, and away from fire and heat sources; the storage temperature should not exceed 30°C, and it should be stored separately from oxidants, halogens, etc., and should not be mixed.

3. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 1, characterized in that: In the step 3, the tank truck comprises a tank truck body (1), a pipe clamping assembly (2), a gas pipe (3), a gas joint assembly (4) and a protective cover (5); the pipe clamping assembly (2) is installed on one side outer wall of the tank truck body (1); the gas pipe (3) is connected through the tank truck body (1); the gas joint assembly (4) is installed on the outer wall of the end of the gas pipe (3); the protective cover (5) is fixedly connected to one side outer wall of the tank truck body (1), and the protective cover (5) is sleeved on the outer wall of the gas pipe (3).

4. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 3, characterized in that: The pipe clamping assembly (2) comprises a motor (201), an elliptical wheel (202), a connecting ring (203), a guide hole (204), a pipe pad (205), a movable plate (206), a clamping arc plate (207), a movable rod (208), a connecting plate (209), a spring (2010) and an extrusion arc plate (2011). The connecting ring (203) is fixedly connected to the outer wall of one side of the tank truck body (1). The pipe pad (205) is fixedly connected to the outer wall of one side of the connecting ring (203). One side of the gas pipeline (3) is placed on the inner wall of the pipe pad (205). One side of the gas pipeline (3) is distributed and connected with a clamping arc plate (207). The outer wall of one side of the clamping arc plate (207) is fixedly connected to the movable plate (206). The three One side of the movable plate (206) is fixedly connected to a movable rod (208); a guide hole (204) is provided on the connecting ring (203) at a position corresponding to the movable rod (208); a connecting disk (209) is fixedly connected to the outer wall of one end of the movable rod (208); a spring (2010) is fixedly connected to the connecting disk (209); and the other end of the spring (2010) is fixedly connected to the outer wall of the connecting ring (203); one side of the two clamping arc plates (207) is fixedly connected to an extrusion arc plate (2011); one side of the two extrusion arc plates (2011) is fitted with an elliptical wheel (202); a motor (201) is embedded and installed on one side of the tank car body (1), and one end of the output shaft of the motor (201) is fixedly connected to the outer wall of the elliptical wheel (202).

5. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 3, characterized in that: The gas transmission joint assembly (4) comprises a valve (401), a fixing ring (402), a threaded sleeve (403), a slip ring (404), a sealing gasket (405) and a buckle (406); the valve (401) is installed on the gas transmission pipe (3); the fixing ring (402) is fixedly connected to the outer wall of one side of the gas transmission pipe (3); the slip ring (404) is slidably connected to the outer wall of one side of the fixing ring (402); the threaded sleeve (403) is fixedly connected to the outer wall of one side of the slip ring (404); the sealing gasket (405) is fixedly connected to the inner wall of one side of the threaded sleeve (403); and the buckle (406) is symmetrically fixedly connected to the outer wall of one side of the threaded sleeve (403).

6. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 3, characterized in that: A circulating compressor (6) is installed on the inner wall of the bottom end of the tank truck body (1), and one end of the output pipe of the circulating compressor (6) is connected to the outer wall of the gas transmission pipe (3).

7. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 3, characterized in that: A temperature regulator (7) is installed on one inner wall of the tank truck body (1), and the electrical output end of the tank truck body (1) is electrically connected to the electrical input end of the temperature regulator (7).

8. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 4, characterized in that: The spring (2010) is sleeved on the outer wall of the moving rod (208).

9. The process for pressurizing and depressurizing between a tank truck and a propane storage tank according to claim 5, characterized in that: One side inner wall of the sealing gasket (405) is sealedly connected to the outer wall of the gas pipe (3), and the sealing gasket (405) is in the shape of a circular ring.

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