Ignition agent filling or discharging tool for ignition agent storage tank

Abstract

The utility model discloses an ignition agent filling or discharging tool for an ignition agent storage box, and belongs to the technical field of ignition agent filling or discharging of ignition agent storage boxes. Comprising two fixing nuts, two threaded sleeves, two first check rings, two first sealing rings, two second check rings, two second sealing rings, two rotating shafts, two shells, two outer sleeve nuts and a storage box, the fixing nuts are in threaded connection with one ends of the rotating shafts, one ends of the fixing nuts are in lap joint with the threaded sleeves, the rotating shafts are sleeved with the threaded sleeves, and the storage box is connected with the outer sleeve nuts. The screw sleeve is in threaded connection outside the shell; according to the utility model, the ignition agent storage tank can be filled or discharged in an aerobic environment, the problem of high skill requirements on operators is solved, and meanwhile, compared with the traditional technology, the operation efficiency is greatly improved, the safety and reliability of the operation process are ensured, the operation is simple, and the practicability is high. And safety accidents caused by combustion of the ignition agent in contact with the air are avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of ignition agent filling or draining ignition agent in ignition agent storage tanks, specifically relating to a tool for filling or draining ignition agent in ignition agent storage tanks. Background Technology

[0002] Currently, the ignition agent in the ignition agent tank is used to start the liquid oxygen kerosene engine in aerospace. The ignition agent will burn violently when it comes into contact with air. There is a great safety risk when adding or draining the ignition agent. The ignition agent must be added into the ignition agent tank in advance, and the unused residual ignition agent is drained from the tank after the test run.

[0003] Traditional methods of adding or discharging ignition agents require placing the ignition agent storage tank in a sealed space filled with inert gas. Operators then operate the addition or discharging system in the control room to add or discharge the ignition agent. This requires extremely high oxygen concentration in the operating environment, resulting in high operating costs, high skill requirements for operators, and long operation time. Therefore, a tool for adding or discharging ignition agents from ignition agent storage tanks is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a tool for adding or discharging ignition agent into an ignition agent storage tank, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tool for adding or discharging ignition agent into an ignition agent storage tank, comprising two fixing nuts, two threaded sleeves, two retaining rings (first type), two sealing rings (first type), two retaining rings (second type), two sealing rings (second type), two rotating shafts, two outer shells, two outer sleeve nuts, and a storage tank. The fixing nuts are threadedly connected to one end of the rotating shafts, and one end of the fixing nuts overlaps with the threaded sleeves. The threaded sleeves are fitted onto the outside of the rotating shafts and threadedly connected to the outside of the outer shells. The retaining rings (first type), sealing rings (first type), retaining rings (second type), and sealing rings (second type) are all disposed between the rotating shafts and the outer shells. An outer sleeve nut is disposed outside the outer shells and is threadedly connected to one end of the storage tank. The storage tank contains a storage tank valve core (first type) and a storage tank valve core (second type). One end of each of the two rotating shafts is disposed within the storage tank valve core (first type) and the storage tank valve core (second type).

[0006] In a preferred embodiment, the threaded sleeve includes an outer hexagonal shape, and the outer hexagonal shape has an internal thread and a square hole.

[0007] In a preferred embodiment, the rotating shaft includes a square column, the square column is provided with an external thread, the square column is connected to a threaded head via a circular column, and the circular column is provided with a first sealing groove and a second sealing groove.

[0008] In one preferred embodiment, the square post is fitted inside the square hole, and the threaded sleeve overlaps with one end of the outer shell.

[0009] In a preferred embodiment, the outer shell is provided with an external thread, and the threaded sleeve is threadedly connected to the outer thread.

[0010] In a preferred embodiment, the outer nut is rotatably connected to one end of the outer casing.

[0011] In a preferred embodiment, the first retaining ring overlaps with the first sealing ring, and the first retaining ring and the first sealing ring are disposed in the first sealing groove; the second retaining ring overlaps with the second sealing ring, and the second retaining ring and the second sealing ring are disposed in the second sealing groove.

[0012] In a preferred embodiment, both the first and second tank valve cores have U-shaped grooves at their tail ends, and both the first and second tank valve cores have valve core sealing surfaces at their other ends. Both the first and second tank valve cores have valve core flow channels and several through holes, and both are inserted into the U-shaped grooves.

[0013] In a preferred embodiment, the tank has a tank inlet at the top and a tank outlet at the bottom. The tank inlet and tank outlet are respectively provided with a tank sealing surface one and a tank sealing surface two. The tank valve core one and the tank valve core two are respectively located in the tank inlet and the tank outlet. The tank sealing surface one and the tank sealing surface two overlap with the two valve core sealing surfaces one.

[0014] In a preferred embodiment, the upper outer casing is connected to the tank inlet via a valve core channel and a through hole, and the tank outlet is connected to the lower outer casing.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention enables the filling or draining of ignition agent from a storage tank in an aerobic environment, solving the problem of high skill requirements for operators. At the same time, it greatly improves operational efficiency compared to traditional technologies, and ensures safe and reliable operation, simple operation, and complete isolation from air to prevent the ignition agent from coming into contact with air and causing combustion and safety accidents. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the overall front cross-section of this utility model;

[0018] Figure 2 This is a partial frontal cross-sectional view of the present invention.

[0019] Figure 3This is a schematic diagram of the overall three-dimensional explosion structure of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the rotating shaft of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of valve core one and valve core two of this utility model;

[0022] Figure 6 This is a three-dimensional cross-sectional structural diagram of valve core one and valve core two of this utility model;

[0023] Figure 7 A frontal cross-sectional view of the ignition agent filling or discharging tool for the ignition agent storage tank of this utility model;

[0024] Figure 8 This is a three-dimensional structural diagram of the screw sleeve of this utility model;

[0025] Figure 9 This is a three-dimensional structural diagram of the outer shell of this utility model;

[0026] Figure 10 This is a schematic diagram of the three-dimensional cross-section of the storage tank of this utility model;

[0027] Figure 11 This is a schematic diagram of a partial three-dimensional cross-section of the storage tank of this utility model;

[0028] Figure 12 This is a schematic diagram showing the flow direction of the gas or ignition agent in this invention.

[0029] In the diagram: 1. Fixing nut; 2. Screw sleeve; 21. Internal thread; 22. External hexagon; 23. Square hole; 3. Retaining ring one; 4. Sealing ring one; 5. Retaining ring two; 6. Sealing ring two; 7. Rotating shaft; 71. Rotating shaft external thread; 72. Square column; 73. Circular column; 74. First sealing groove; 75. Second sealing groove; 76. Slotted head; 8. Outer shell; 81. Outer shell external thread; 9. Outer nut; 10. Tank valve core one; 101. U-shaped groove; 102. Valve core sealing surface one; 103. Through hole; 104. Valve core flow channel; 11. Tank; 111. Tank sealing surface one; 112. Tank sealing surface two; 12. Tank valve core two. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments.

[0031] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0032] Please see Figure 1-12 This utility model provides a tool for adding or discharging ignition agent into an ignition agent storage tank, comprising two fixing nuts 1, two threaded sleeves 2, two retaining rings 3, two sealing rings 4, two retaining rings 5, two sealing rings 6, two rotating shafts 7, two outer shells 8, two outer nuts 9, and a storage tank 11. The fixing nuts 1 are threadedly connected to one end of the rotating shafts 7, and one end of the fixing nuts 1 overlaps with the threaded sleeves 2. The threaded sleeves 2 include an outer hexagon 22, with an internal thread 21 and a square hole 23 inside the outer hexagon 22. The threaded sleeves 2 are sleeved on the outside of the rotating shafts 7 and threadedly connected to the outside of the outer shells 8. The retaining rings 3, 4, 5, and 6 are... Both sealing rings 2 and 6 are located between the rotating shaft 7 and the outer casing 8. The rotating shaft 7 includes a square post 72 with an external thread 71. The square post 72 is connected to a slotted head 76 via a circular post 73. The circular post 73 has a first sealing groove 74 and a second sealing groove 75. The square post 72 is fitted into a square hole 23. The threaded sleeve 2 overlaps with one end of the outer casing 8. The outer casing 8 has an outer nut 9 with an external thread 81. The threaded sleeve 2 is threaded onto the outer thread 81. The outer nut 9 is rotatably connected to one end of the outer casing 8. The retaining ring 1 and the sealing ring 1 overlap. The retaining ring 1 and the sealing ring 1 are located in the first sealing... Inside groove 74, retaining ring 2 5 overlaps with sealing ring 2 6. Retaining ring 2 5 and sealing ring 2 6 are located inside the second sealing groove 75. Outer nut 9 is threadedly connected to one end of storage tank 11. Storage tank 11 is equipped with storage tank valve core 1 10 and storage tank valve core 2 12. One end of each of the two rotating shafts 7 is located inside storage tank valve core 1 10 and storage tank valve core 2 12, respectively. Both storage tank valve core 1 10 and storage tank valve core 2 12 have U-shaped grooves 101 at their tail ends. Both storage tank valve core 1 10 and storage tank valve core 2 12 have valve core sealing surfaces 102 at their other ends. Both storage tank valve core 1 10 and storage tank valve core 2 12 have valve core flow channels 104 and several through holes 103. The heads 76 are all inserted into the U-shaped grooves 101. The top of the storage tank 11 has a storage tank 11 inlet and the bottom of the storage tank 11 has a storage tank 11 outlet. The storage tank 11 inlet and the storage tank 11 outlet are respectively provided with a storage tank sealing surface 111 and a storage tank sealing surface 112. The storage tank valve core 10 and the storage tank valve core 12 are respectively provided in the storage tank 11 inlet and the storage tank 11 outlet. The storage tank sealing surface 111 and the storage tank sealing surface 112 overlap with the two valve core sealing surfaces 102. The upper outer shell 8 is connected to the storage tank 11 inlet through the valve core channel 104 and the through hole 103. The storage tank 11 outlet is connected to the lower outer shell 8.

[0033] By setting a square hole 23 and a square post 72, the square hole 23 in the threaded sleeve 2 and the square post 72 in the rotating shaft 7 cooperate with each other. Then, by fixing the nut 1, the threaded sleeve 2 is locked and fixed on the rotating shaft 7 through the end face, so that there will be no angular displacement between the threaded sleeve 2 and the rotating shaft 7.

[0034] By setting the outer nut 9 and the storage tank 11, the outer shell 8 is fixed to the interface of the storage tank 11 through the outer nut 9, thus isolating it from the outside world;

[0035] By setting a 76-shaped head and a U-shaped groove 101, the 76-shaped head on the end face of the rotating shaft 7 is inserted into the U-shaped groove 101 on the valve core in the inlet of the storage tank 11. The 76-shaped head and the U-shaped groove 101 cooperate with each other to connect the storage tank valve core 10 or the storage tank valve core 12 to the rotating shaft 7.

[0036] By setting the screw sleeve 2, manually rotating the outer hexagon 22 of the screw sleeve 2 forward or reverse, the internal thread 21 in the screw sleeve 2 and the external thread of the mating outer shell 8 will undergo angular displacement, causing the rotating shaft 7 to move to the left or right as a whole, thereby causing the valve core of the storage tank 11 to move left and right, so that the valve core sealing surface 102 of the storage tank valve core 10 separates from or overlaps with the storage tank sealing surface 111, thus opening or closing the inlet channel of the storage tank 11.

[0037] By setting up a first retaining ring 3, a first sealing ring 4, a second retaining ring 5, and a second sealing ring 6, the two sealing structures formed by the first retaining ring 3 and the first sealing ring 4 and the second retaining ring 5 and the second sealing ring 6 can isolate the air outside the outer shell 8, preventing the outside air from entering the outer shell 8 or the ignition agent from leaking into the outside air and causing the ignition agent to burn and cause danger.

[0038] The calculations for retaining ring 1 (3), sealing ring 1 (4), retaining ring 2 (5), and sealing ring 2 (6) are as follows:

[0039] (I) Reliability design for sealing effect:

[0040] ① Reliability calculation of sealing effect: The sealing rings selected in this tool, 4 and 6, are φ6.9*1.8 rubber O-rings, with an inner diameter of 6.9mm and a cross-sectional area of ​​1.8mm. To ensure a good sealing effect, according to the mechanical design manual, the recommended compression rate of O-rings for reciprocating cylindrical surfaces is between 10% and 15%. Based on the calculation of this utility model: W=[D-(d2-d1) / 2] / D=[1.8-(10.2-7.1) / 2] / 1 .8=13.9%, where: W——O-ring compression ratio, D——O-ring cross-sectional diameter in free state (mm), h——distance between the bottom of the O-ring groove and the sealed surface, i.e., the cross-sectional height of the O-ring after compression (mm), d1——the outer diameter of the rotating shaft (7) in contact with the O-ring (mm), the size of this design is φ7.1mm, d2——the inner diameter of the housing hole in contact with the O-ring (mm), the size of this design is φ10.2mm;

[0041] Calculations show that the compression rate of the O-ring is 13.9%, which ensures that sealing ring 4 and sealing ring 6 have good sealing reliability.

[0042] In addition, by setting sealing ring 4 and sealing ring 6, the risk of leakage due to the failure of one of the sealing rings is prevented, which further improves the sealing reliability of the tool.

[0043] ② Roughness design: In order to ensure a good sealing effect, according to the mechanical design manual, the surface roughness of the sealing surface that contacts the O-ring is required to be 1.6.

[0044] (II) Pressure-bearing capacity reliability design:

[0045] According to the mechanical manual: when the working pressure p < 10MPa, no retaining ring is required; when p > 10MPa, a retaining ring can be installed on the bearing surface of the O-ring, and one retaining ring is required for unidirectional pressure.

[0046] The working pressure is 3MPa. To ensure design versatility, it is actually designed with a working pressure of 15MPa. The right side of sealing ring 4 and sealing ring 6 is the pressure-bearing surface. Therefore, PTFE retaining rings 3 and 5 are added to the left side of sealing ring 4 and sealing ring 6 to improve the pressure-bearing reliability of sealing ring 4 and sealing ring 6.

[0047] Working principle and usage process of this utility model:

[0048] I. Ignition agent charging process:

[0049] 1) The inlet and outlet of the storage tank 11 are connected to the two outer shells 8 respectively by the outer nut 9. Tighten the outer nut 9 to fix the outer shell 8 on the storage tank 11 and isolate it from the outside.

[0050] 2) Insert the small end of the rotating shaft 7 in the outer casing 8 on both sides into the U-shaped groove 101 on the valve core in the inlet of the storage tank 11;

[0051] 3) Rotate the screw sleeve 2 in the outer shell 8 counterclockwise to drive the rotating shaft 7 to move to the left, so that the valve core sealing surface 102 separates from the tank sealing surface 111, and the inlet channel of the tank 11 can be opened.

[0052] 4) Perform the same operation on the lower outer casing 8 to separate the valve core inside the outlet of the storage tank 11 from the sealing surface 111 of the storage tank and open the outlet channel of the storage tank 11.

[0053] 5) Install the filling pipeline at the filling inlet and the filling discharge pipeline at the filling outlet;

[0054] 6) Inert gas is introduced into the inlet of the storage tank 11 through the filling pipeline. The inert gas enters the inside of the storage tank 11 through the upper outer shell 8, and squeezes the air inside the storage tank 11 out of the lower outer shell 8 connected to the outlet of the storage tank 11. After a period of time, all the air in the storage tank 11 is squeezed out, and the inside of the storage tank 11 is filled with inert gas, thus completing the replacement of the air inside the storage tank 11.

[0055] 7) Ignition agent is added to the inlet of storage tank 11 through the filling pipeline. The ignition agent enters the interior of storage tank 11 through the upper outer shell 8, and the inert gas inside storage tank 11 is squeezed out through the lower outer shell 8 connected to the outlet of storage tank 11. After a period of time, ignition agent without bubbles flows out of the filling outlet. If there are no bubbles in the filling outlet pipeline, it can be determined that all the inert gas has been squeezed out. At this time, the interior of storage tank 11 is full of ignition agent.

[0056] 8) Rotate the screw sleeve 2 at the bottom of the lower outer casing 8 clockwise to drive the rotating shaft 7 to move upward, so that the valve core sealing surface 102 and the storage tank sealing surface 111 are engaged. After engagement, apply a specified torque to ensure that the valve core at the outlet of the storage tank 11 is effectively sealed.

[0057] 9) Continue to add ignition agent to the inlet of tank 11 until the internal pressure of tank 11 reaches 3MPa, then maintain the inlet pressure of the charging system equipment at 3MPa;

[0058] 10) Rotate the screw sleeve 2 of the upper outer shell 8 clockwise to drive the rotating shaft 7 to move to the right, so that the valve core sealing surface 102 and the storage tank sealing surface 111 are engaged. After engagement, apply the specified torque to ensure that the valve core at the inlet of the storage tank 11 is effectively sealed.

[0059] 11) Dismantle the filling inlet and outlet pipelines to complete the filling process;

[0060] II. Ignition agent release process

[0061] 1) Install an outer shell 8 at the inlet and outlet of the storage tank 11 respectively. Install the outer shell nut 9 of each of the two outer shells 8 at the inlet and outlet of the storage tank 11 respectively. Tighten the outer shell nut 9 to fix the outer shell 8 on the storage tank 11 and isolate it from the outside.

[0062] 2) Insert the small end of the rotating shaft 7 in the outer casing 8 on both sides into the U-shaped groove 101 on the valve core in the inlet of the storage tank 11;

[0063] 3) Install the venting propulsion pipeline at the filling outlet and the venting discharge pipeline at the filling inlet;

[0064] 4) Rotate the screw sleeve 2 of the upper outer shell 8 counterclockwise to drive the rotating shaft 7 to move to the left, so that the valve core sealing surface 102 separates from the tank sealing surface 111, and the inlet channel of the tank 11 can be opened.

[0065] 5) Perform the same operation on the lower outer casing 8 to separate the valve core inside the outlet of the storage tank 11 from the sealing surface 111 of the storage tank and open the outlet channel of the storage tank 11.

[0066] 6) Inert gas is introduced into the outlet of the storage tank 11 through the venting propulsion pipe. The inert gas enters the interior of the storage tank 11 through the lower outer shell 8, and squeezes the ignition agent inside the storage tank 11 out of the upper outer shell 8 at the inlet of the storage tank 11. After a period of time, all the ignition agent in the storage tank 11 is squeezed out, thus completing the venting of the ignition agent inside the storage tank 11.

[0067] 7) If no ignition agent residue is found in the discharge pipeline after checking the discharge system equipment, it can be determined that all the ignition agent has been squeezed out.

[0068] 8) Dismantle the venting propulsion pipeline and venting discharge pipeline of the injection port and injection outlet to complete the entire ignition agent venting process.

[0069] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for adding or discharging ignition agent into an ignition agent storage tank, comprising two fixing nuts (1), two threaded sleeves (2), two retaining rings (3), two sealing rings (4), two retaining rings (5), two sealing rings (6), two rotating shafts (7), two outer shells (8), two outer nuts (9), and a storage tank (11), characterized in that: The fixing nut (1) is threaded to one end of the rotating shaft (7). One end of the fixing nut (1) overlaps with the screw sleeve (2). The screw sleeve (2) is sleeved outside the rotating shaft (7). The screw sleeve (2) is threaded to the outside of the outer shell (8). The first retaining ring (3), the first sealing ring (4), the second retaining ring (5), and the second sealing ring (6) are all located between the rotating shaft (7) and the outer shell (8). The outer shell (8) is provided with an outer nut (9). The outer nut (9) is threaded to one end of the storage tank (11). The storage tank (11) is provided with a storage tank valve core one (10) and a storage tank valve core two (12). One end of each of the two rotating shafts (7) is located inside the storage tank valve core one (10) and the storage tank valve core two (12).

2. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 1, characterized in that: The threaded sleeve (2) includes an outer hexagon (22), and the outer hexagon (22) has an internal thread (21) and a square hole (23).

3. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 1, characterized in that: The rotating shaft (7) includes a square post (72), the square post (72) is provided with a rotating shaft external thread (71), the square post (72) is connected to a pin (76) through a circular post (73), and the circular post (73) is provided with a first sealing groove (74) and a second sealing groove (75).

4. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 3, characterized in that: The square post (72) is fitted inside the square hole (23), and the screw sleeve (2) overlaps with one end of the outer shell (8).

5. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 1, characterized in that: The outer shell (8) is provided with an external thread (81), and the screw sleeve (2) is threaded to the outside of the external thread (81).

6. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 1, characterized in that: The outer nut (9) is rotatably connected to one end of the outer shell (8).

7. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 1, characterized in that: The first retaining ring (3) overlaps with the first sealing ring (4), and the first retaining ring (3) and the first sealing ring (4) are located in the first sealing groove (74). The second retaining ring (5) overlaps with the second sealing ring (6), and the second retaining ring (5) and the second sealing ring (6) are located in the second sealing groove (75).

8. The tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 1, characterized in that: The tail ends of the first tank valve core (10) and the second tank valve core (12) are provided with U-shaped grooves (101). The other ends of the first tank valve core (10) and the second tank valve core (12) are provided with valve core sealing surfaces (102). The first tank valve core (10) and the second tank valve core (12) are provided with valve core flow channels (104) and several through holes (103). The two I-shaped heads (76) are inserted into the U-shaped grooves (101).

9. A tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 8, characterized in that: The top of the storage tank (11) is provided with a storage tank (11) inlet, and the bottom of the storage tank (11) is provided with a storage tank (11) outlet. The storage tank (11) inlet and the storage tank (11) outlet are respectively provided with a storage tank sealing surface one (111) and a storage tank sealing surface two (112). The storage tank valve core one (10) and the storage tank valve core two (12) are respectively provided in the storage tank (11) inlet and the storage tank (11) outlet. The storage tank sealing surface one (111) and the storage tank sealing surface two (112) overlap with the two valve core sealing surfaces one (102).

10. A tool for adding or discharging ignition agent into an ignition agent storage tank according to claim 9, characterized in that: The upper outer casing (8) is connected to the inlet of the storage tank (11) through the valve core flow channel (104) and through hole (103) in the valve core (10), and the outlet of the storage tank (11) is connected to the lower outer casing (8).

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