阅读说明：本技术 一种适用于腐蚀性液体的密封装置 (Sealing device suitable for corrosive liquid ) 是由 许志峰 曹玉武 蒋忠亮 宋玉江 李广嘉 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种适用于腐蚀性液体的密封装置,下端零件的回转体轴线与上端零件的回转体轴线重合,下端零件位于上端零件下端,下端零件的第四上端同心圆环面与上端零件的第一圆平面接触,下端零件与上端零件通过螺钉连接,密封原件位于下端零件的第四上端环形凹槽中,密封原件的第二下端环形凸起与下端零件的第四环形凹槽接触；本发明在聚四氟乙烯内部装嵌弹簧圈,通过弹簧圈提高聚四氟乙烯的压缩弹性,使得聚四氟乙烯和弹簧圈的组合体同时具有良好的弹性和耐腐蚀性两个特点,使得战斗部壳体在机械接口处即满足了耐腐蚀性要求又满足了密封性要求。保障了长期存储过程中,腐蚀性液体装药战斗部的可靠密封性。(The invention discloses a sealing device suitable for corrosive liquid, wherein the axis of a revolving body of a lower end part is superposed with the axis of a revolving body of an upper end part, the lower end part is positioned at the lower end of the upper end part, a fourth upper concentric annular surface of the lower end part is contacted with a first circular plane of the upper end part, the lower end part is connected with the upper end part through a screw, a sealing element is positioned in a fourth upper annular groove of the lower end part, and a second lower annular bulge of the sealing element is contacted with a fourth annular groove of the lower end part; the spring ring is embedded in the polytetrafluoroethylene, the compression elasticity of the polytetrafluoroethylene is improved through the spring ring, so that the polytetrafluoroethylene and spring ring combined body has the two characteristics of good elasticity and corrosion resistance, and the warhead shell meets the requirements of corrosion resistance and sealing performance at the mechanical interface. The reliable leakproofness of the corrosive liquid charging warhead is guaranteed in the long-term storage process.)

1. A sealing device suitable for corrosive liquid comprises an upper end part (1), and is characterized by further comprising a sealing element (2), an annular spring (3) and a lower end part (4);

the upper end part (1) is a first circular plate, the first circular plate of the upper end part (1) is a revolving body, the lower end face of the first circular plate of the upper end part (1) is a first circular plane, a circle of first annular groove is arranged on the first circular plane of the upper end part (1), the axial section of the first annular groove of the upper end part (1) is inverted V-shaped, and the revolving axis of the first annular groove of the upper end part (1) is superposed with the axis of the revolving body of the upper end part (1);

the upper end part (1) is an upper part of a mechanical connection interface in the liquid charging shell, and the liquid charging is positioned at the lower end of the upper end part (1);

the sealing element (2) is a second ring body, the second ring body of the sealing element (2) is a revolving body, the axial section of a second ring body of the sealing element (2) is rectangular, the upper end surface of the second ring body of the sealing element (2) is a second upper end upward concentric ring surface, the lower end surface of the second ring body of the sealing element (2) is a second lower end downward concentric ring surface, the outer side surface of the second ring body of the sealing element (2) is a second outer side cylindrical surface, the inner side surface of the second ring body of the sealing element (2) is a second inner side cylindrical surface, a circle of second upper end annular bulge is arranged on the second upper end upward concentric ring surface of the sealing element (2), the axial section of the second upper end annular bulge of the sealing element (2) is an inverted V shape, the revolving axis of the second upper end annular bulge of the sealing element (2) is superposed with the axial line of the revolving body of the sealing element (2), a circle of second lower end annular bulge is arranged on the second lower end downward concentric ring surface of the sealing element (2), the section of a second lower end annular bulge shaft of the sealing original (2) is V-shaped, the second lower end annular bulge rotary axis of the sealing original (2) is superposed with the rotary body axis of the sealing original (2), a second outer side circular groove is arranged on a second outer side circular cylinder surface of the sealing original (2), the section of a second outer side circular groove shaft of the sealing original (2) is rectangular, the upper end surface of the second outer side circular groove of the sealing original (2) is a second upper end downward concentric circular ring surface, a circle of second upper end annular groove is arranged on the second upper end downward concentric circular ring surface of the sealing original (2), the section of the second upper end circular groove shaft of the sealing original (2) is arc-shaped, the rotary axis of the second upper end annular groove of the sealing original (2) is superposed with the rotary body axis of the sealing original (2), the lower end surface of the second outer side circular groove of the sealing original (2) is a second lower end upward concentric circular ring surface, a circle of second lower end annular groove is formed in an upward concentric circular ring surface at the second lower end of the sealing element (2), the axial section of the second lower end annular groove of the sealing element (2) is arc-shaped, and the rotation axis of the second lower end annular groove of the sealing element (2) is overlapped with the rotation axis of the rotation body of the sealing element (2);

the axis of a revolving body of the sealing element (2) is superposed with the axis of a revolving body of the upper end part (1), the sealing element (2) is positioned at the lower end of the upper end part (1), and a second upper end annular bulge of the sealing element (2) is contacted with a first annular groove of the upper end part (1);

the annular spring (3) is a third annular body, the third annular body of the annular spring (3) is a revolving body, the axial section of the third annular body of the annular spring (3) is a concentric circle, the upper half part of the outer surface of the third annular body of the annular spring (3) is a third upper-end semicircular section annular surface, and the lower half part of the outer surface of the third cylindrical body of the annular spring (3) is a third lower-end semicircular section annular surface;

the axis of a revolving body of the annular spring (3) is superposed with the axis of a revolving body of the upper end part (1), the annular spring (3) is positioned in a second outer side annular groove of the sealing element (2), a third upper end semicircular section annular surface of the annular spring (3) is contacted with the second upper end annular groove of the sealing element (2), and a third lower end semicircular section annular surface of the annular spring (3) is contacted with a second lower end annular groove of the sealing element (2);

the lower end part (4) is a fourth cylinder, the fourth cylinder of the lower end part (4) is a revolving body, the upper end of the fourth cylinder of the lower end part (4) is provided with a fourth inner flange, the upper surface of the fourth inner flange of the lower end part (4) is a fourth upper concentric circular ring surface, the fourth upper concentric circular ring surface of the lower end part (4) is provided with a circle of fourth upper annular groove, the axial section of the fourth upper annular groove of the lower end part (4) is rectangular, the fourth upper annular groove of the lower end part (4) is composed of three surfaces, the bottom surface of the fourth upper annular groove of the lower end part (4) is a fourth middle concentric circular ring surface, the side surface of the fourth upper annular groove of the lower end part (4) close to the revolving body axis of the lower end part (4) is a fourth inner cylindrical surface, the side surface of the fourth upper annular groove of the lower end part (4) far away from the revolving body axis of the lower end part (4) is a fourth outer cylindrical surface, a circle of fourth annular groove is formed in the fourth middle concentric circular ring surface of the lower end part (4), the axial section of the fourth annular groove of the lower end part (4) is V-shaped, and the rotation axis of the fourth annular groove of the lower end part (4) is overlapped with the rotation axis of the lower end part (4);

the axis of a revolving body of the lower end part (4) coincides with the axis of a revolving body of the upper end part (1), the lower end part (4) is positioned at the lower end of the upper end part (1), a fourth upper end concentric circular ring surface of the lower end part (4) is contacted with a first circular plane of the upper end part (1), the lower end part (4) is connected with the upper end part (1) through a screw, the sealing element (2) is positioned in a fourth upper end annular groove of the lower end part (4), a second lower end annular bulge of the sealing element (2) is contacted with a fourth annular groove of the lower end part (4), the lower end part (4) is a lower part of a mechanical connection interface in a liquid phase charging shell, and the liquid phase charging is positioned at the inner side of the lower end part (4;

the sealing element (2) is made of polytetrafluoroethylene.

The annular spring (3) is made of spring steel;

the axial section of the first annular groove of the upper end part (1) is inverted V-shaped, and the included angle of two sides of the inverted V-shaped axial section of the first annular groove of the upper end part (1) is 107-113 degrees;

the axial section of the fourth annular groove of the lower end part (4) is V-shaped, and the included angle of the two V-shaped sides of the axial section of the fourth annular groove of the lower end part (4) is 107-113 degrees;

the section of the annular bulge shaft at the second upper end of the sealing element (2) is inverted V-shaped, and the included angle of two sides of the inverted V-shaped section of the annular bulge shaft at the second upper end of the sealing element (2) is 94-103 degrees;

the section of the second lower end annular bulge shaft of the sealing element (2) is V-shaped, and the included angle of two V-shaped sides of the section of the second lower end annular bulge shaft of the sealing element (2) is 94-103 degrees;

the axial section of a second lower end annular groove of the sealing element (2) is arc-shaped, the axial section of a second upper end annular groove of the sealing element (2) is arc-shaped, and the arc-shaped diameter of the axial section of the second upper end annular groove of the sealing element (2) is the same as that of the axial section of the second lower end annular groove of the sealing element (2);

the axial cross section of the third ring body of the annular spring (3) is concentric, and the ratio of the major circle diameter of the axial cross section of the third ring body of the annular spring (3) to the circular arc diameter of the axial cross section of the second upper end annular groove of the sealing original (2) is 1: 2.3 to 3.4;

the axial cross section of the third ring body of the annular spring (3) is concentric, and the ratio of the small diameter to the large diameter of the axial cross section of the third ring body of the annular spring (3) is 1: 1.3 to 1.8;

the sealing device suitable for corrosive liquid comprises the following steps:

step 1: filling the liquid charge into the lower end part (4);

step 2: assembling the sealing element (2) with the annular spring (3);

and step 3: assembling the annular spring (3) with the lower end part (4);

and 4, step 4: assembling the upper end part (1) and the lower end part (4), after the upper end part (1) and the lower end part (4) are assembled, the first annular groove of the upper end part (1) extrudes the second upper end annular bulge of the sealing element (2), the second upper end annular bulge of the sealing element (2) extrudes the second upper end annular groove of the sealing element (2), the second upper end annular groove of the sealing element (2) extrudes the third upper end semicircular section annular surface of the annular spring (3), make the third ring body of annular spring (3) receive the axial extrusion, the concentric circle of the third ring body axial cross-section of annular spring (3) becomes concentric ellipse after the extrusion, the third ring body axial cross-section outline of annular spring (3) after the extrusion is oval, the oval minor axis length of the third ring body axial cross-section outline of annular spring (3) after the extrusion is 1 with the ratio of major axis length: 1.15 to 1.18, the annular spring (3) which is axially extruded continuously transmits the axial force downwards, the second lower end annular groove of the sealing element (2) is extruded by the third lower end semicircular section annular surface of the annular spring (3), the second lower end annular groove of the sealing element (2) is extruded by the second lower end annular bulge of the sealing element (2), and the fourth annular groove of the lower end part (4) is extruded by the second lower end annular bulge of the sealing element (2), because the second lower end annular bulge of the sealing element (2) and the fourth annular groove of the lower end part (4) are mutually extruded, so that the contact surface of the sealing element (2) and the lower end part (4) has sealing performance, because the first annular groove of the upper end part (1) and the second upper end annular bulge of the sealing element (2) are mutually extruded, so that the contact surface of the upper end part (1) and the sealing element (2) has sealing property.

2. A sealing device for corrosive liquids according to claim 1, wherein the right end of the sealing element (2) is provided with a ring-shaped part, the axial section of the ring-shaped part is V-shaped, and the V-shaped opening of the ring-shaped part is directed towards the axis of the ring-shaped part.

3. A sealing device for corrosive liquids according to claim 1, characterized in that the left end of the sealing element (2) is provided with a ring-shaped part, the cross-section of the axis of the ring-shaped part is cross-shaped, the material of the ring-shaped part is stainless steel 304, the ring-shaped part is supported in a second outer ring-shaped groove of the sealing element (2), the upper end of the sealing element (2) is in contact with the upper end part (1), and the lower end of the sealing element (2) is in contact with the lower end part (4).

4. A sealing device for corrosive liquids according to claim 1, characterized in that the left end of the sealing element (2) is provided with a ring-shaped part, the axial cross-section of the ring-shaped part is X-shaped, the material of the ring-shaped part is teflon, the upper end of the ring-shaped part is in contact with the upper end part (1), and the lower end of the upper end part (1) is in contact with the lower end part (4).

5. The sealing device for corrosive liquids of claim 1, further comprising the steps of:

step 1: filling the liquid charge into the lower end part (4);

step 2: assembling the sealing element (2) with the annular spring (3);

and step 3: the annular spring (3) is assembled with a lower end part (4), 4 alarms are installed on the outer side of the sealing element (2), a detection joint is arranged at the lower end of each alarm, and when the detection joints detect that the alarm is in contact with liquid, the alarm gives an alarm;

and 4, step 4: assembling the upper end part (1) and the lower end part (4), after the upper end part (1) and the lower end part (4) are assembled, the first annular groove of the upper end part (1) extrudes the second upper end annular bulge of the sealing element (2), the second upper end annular bulge of the sealing element (2) extrudes the second upper end annular groove of the sealing element (2), the second upper end annular groove of the sealing element (2) extrudes the third upper end semicircular section annular surface of the annular spring (3), make the third ring body of annular spring (3) receive the axial extrusion, the concentric circle of the third ring body axial cross-section of annular spring (3) becomes concentric ellipse after the extrusion, the third ring body axial cross-section outline of annular spring (3) after the extrusion is oval, the oval minor axis length of the third ring body axial cross-section outline of annular spring (3) after the extrusion is 1 with the ratio of major axis length: 1.15 to 1.18, the annular spring (3) which is axially extruded continuously transmits the axial force downwards, the second lower end annular groove of the sealing element (2) is extruded by the third lower end semicircular section annular surface of the annular spring (3), the second lower end annular groove of the sealing element (2) is extruded by the second lower end annular bulge of the sealing element (2), and the fourth annular groove of the lower end part (4) is extruded by the second lower end annular bulge of the sealing element (2), because the second lower end annular bulge of the sealing element (2) and the fourth annular groove of the lower end part (4) are mutually extruded, so that the contact surface of the sealing element (2) and the lower end part (4) has sealing performance, because the first annular groove of the upper end part (1) and the second upper end annular bulge of the sealing element (2) are mutually extruded, so that the contact surface of the upper end part (1) and the sealing element (2) has sealing property.

6. The sealing device for corrosive liquid according to claim 1, comprising the following steps:

step 1: filling the liquid charge into the lower end part (4);

step 2: assembling the sealing element (2) with the annular spring (3);

and step 3: assembling the annular spring (3) with the lower end part (4);

and 4, step 4: assembling the upper end part (1) and the lower end part (4), after the upper end part (1) and the lower end part (4) are assembled, the first annular groove of the upper end part (1) extrudes the second upper end annular bulge of the sealing element (2), the second upper end annular bulge of the sealing element (2) extrudes the second upper end annular groove of the sealing element (2), the second upper end annular groove of the sealing element (2) extrudes the third upper end semicircular section annular surface of the annular spring (3), make the third ring body of annular spring (3) receive the axial extrusion, the concentric circle of the third ring body axial cross-section of annular spring (3) becomes concentric ellipse after the extrusion, the third ring body axial cross-section outline of annular spring (3) after the extrusion is oval, the oval minor axis length of the third ring body axial cross-section outline of annular spring (3) after the extrusion is 1 with the ratio of major axis length: 1.15-1.18, the annular spring (3) which is axially extruded continuously transmits the axial force downwards, the annular surface of the third lower end semicircular section of the annular spring (3) extrudes the annular groove of the second lower end of the sealing element (2), the annular groove of the second lower end of the sealing element (2) extrudes the annular bulge of the second lower end of the sealing element (2), the annular bulge of the second lower end of the sealing element (2) extrudes the annular groove of the lower end part (4), because the annular bulge of the second lower end of the sealing element (2) and the annular groove of the lower end part (4) extrude with each other, the contact surface of the sealing element (2) and the contact surface of the lower end part (4) have sealing performance, because the annular groove of the first upper end part (1) and the annular bulge of the second upper end of the sealing element (2) extrude with each other, the contact surface of the upper end part (1) and the sealing element (2) have sealing performance, the temperature sensor and the pressure sensor are mounted at the lower end of the middle part of the upper end part (1), the temperature and pressure results are displayed at the upper end of the middle part of the upper end part (1), the pressure of the internal liquid is increased along with the rise of the temperature, and the relation between the pressure and the temperature can be theoretically calculated, so that the internal temperature and pressure results can be observed at any time and compared with the theoretical calculation results, if the pressure and temperature data accord with the theoretical calculation results, the internal sealing is good, and if the pressure is lower than the theoretical calculation results at the temperature, the leakage occurs.

Technical Field

The invention belongs to the technical field of shells for filling liquid, relates to a sealing device for filling liquid, and particularly relates to a sealing device suitable for corrosive liquid.

Background

The inside high energy fuel that loads in corrosive liquid powder charge warhead, the inside high energy fuel that loads in corrosive liquid powder charge warhead contain the liquid phase material, consequently, all need to have the leakproofness with each position of high energy fuel contact in the corrosive liquid powder charge warhead, and mechanical interfaces such as casing, front and back end cover, loading mouth, cable spool and the pipe of scattering the pencil of corrosive liquid powder charge warhead all need satisfy sealed requirement.

Changchun et al reported in the document "missile rubber seal environmental failure study" (equipment environmental engineering, 8 months 2011, volume 8, page 4, 59): the warhead sealing material mainly adopts rubber. The elastic modulus of the rubber is 7.8MPa, the rubber has good elasticity, when the rubber is in extrusion contact with the metal shell, the rubber is elastically deformed under the action of pressure, and the rubber and the metal shell can be well attached to realize a sealing effect. The high-energy liquid-phase fuel filled in the corrosive liquid charging warhead has strong corrosivity, and various rubber materials are subjected to chemical reaction with the high-energy liquid-phase fuel to lose effectiveness. When the corrosive liquid charging warhead is applied to a weapon platform, the storage condition of at least ten years needs to be met. In the long-term storage process, the rubber sealing element loses efficacy due to chemical reaction with high-energy liquid-phase fuel, and corrosive liquid leaks from the corrosive liquid charging warhead, so that the warhead loses efficacy.

The effect of stretching treatment on the properties of polytetrafluoroethylene (aeronautical materials bulletin, 12 months 2013, volume 33, page 6, 57) was reported by ssdona et al in the literature: the polytetrafluoroethylene is a high polymer material with excellent comprehensive performance and has excellent high and low temperature resistance and chemical corrosion resistance. Compatibility experiments prove that the polytetrafluoroethylene is in contact with the high-energy liquid-phase fuel for a long time, does not generate chemical reaction and has long-term storage conditions. However, polytetrafluoroethylene is poor in elasticity, and the elastic modulus of polytetrafluoroethylene is 60MPa, which is 8 times the elastic modulus of rubber. Under the same pressure, the deformation amount of the polytetrafluoroethylene can only be 1/8 of rubber, and when the polytetrafluoroethylene is in extrusion contact with the metal shell, the close degree of the polytetrafluoroethylene and the metal shell is greatly reduced, so that the reliable long-term sealing effect is difficult to realize.

Disclosure of Invention

In order to overcome the defects and defects of the prior art, the invention provides the sealing device suitable for corrosive liquid, the spring ring is embedded in the polytetrafluoroethylene, the compression elasticity of the polytetrafluoroethylene is improved through the spring ring, so that the polytetrafluoroethylene and spring ring combined body has two characteristics of good elasticity and corrosion resistance, and the warhead shell meets the requirements on corrosion resistance and sealing performance at the mechanical interface. The reliable leakproofness of the corrosive liquid charging warhead is guaranteed in the long-term storage process.

The invention provides a sealing device suitable for corrosive liquid, which comprises an upper end part 1, and is characterized by further comprising a sealing element 2, an annular spring 3 and a lower end part 4;

the upper end part 1 is a first circular plate, the first circular plate of the upper end part 1 is a revolving body, the lower end surface of the first circular plate of the upper end part 1 is a first circular plane, a circle of first annular groove is arranged on the first circular plane of the upper end part 1, the axial section of the first annular groove of the upper end part 1 is inverted V-shaped, and the revolving axis of the first annular groove of the upper end part 1 is superposed with the axis of the revolving body of the upper end part 1;

the upper end part 1 is an upper part of a mechanical connection interface in the liquid charging shell, and the liquid charging is positioned at the lower end of the upper end part 1;

the sealing element 2 is a second ring body, the second ring body of the sealing element 2 is a revolving body, the axial section of the second ring body of the sealing element 2 is rectangular, the upper end surface of the second ring body of the sealing element 2 is a second upper end upward concentric ring surface, the lower end surface of the second ring body of the sealing element 2 is a second lower end downward concentric ring surface, the outer side surface of the second ring body of the sealing element 2 is a second outer side cylindrical surface, the inner side surface of the second ring body of the sealing element 2 is a second inner side cylindrical surface, a circle of second upper end annular bulge is arranged on the second upper end upward concentric ring surface of the sealing element 2, the axial section of the second upper end annular bulge of the sealing element 2 is inverted V-shaped, the revolving axis of the second upper end annular bulge of the sealing element 2 is coincident with the axis of the revolving body of the sealing element 2, a circle of second lower end downward concentric ring surface of the sealing element 2 is provided with a circle of second lower end, the section of a second lower end annular bulge shaft of the sealing element 2 is V-shaped, the rotary axis of the second lower end annular bulge of the sealing element 2 is overlapped with the rotary axis of the sealing element 2, a second outer side circular cylindrical surface of the sealing element 2 is provided with a second outer side annular groove, the section of a second outer side annular groove shaft of the sealing element 2 is rectangular, the upper end surface of the second outer side annular groove of the sealing element 2 is a second upper end downward concentric circular ring surface, a circle of second upper end annular groove is arranged on the second upper end downward concentric circular ring surface of the sealing element 2, the section of the second upper end annular groove shaft of the sealing element 2 is arc-shaped, the rotary axis of the second upper end annular groove of the sealing element 2 is overlapped with the rotary axis of the sealing element 2, the lower end surface of the second outer side annular groove of the sealing element 2 is a second lower end upward concentric circular ring surface, a circle of second lower end upward concentric circular ring surface of the sealing element 2 is provided with a circle of second, the axial section of the second lower end annular groove of the sealing element 2 is arc-shaped, and the rotation axis of the second lower end annular groove of the sealing element 2 is superposed with the rotation body axis of the sealing element 2;

the axis of the revolving body of the sealing element 2 is superposed with the axis of the revolving body of the upper end part 1, the sealing element 2 is positioned at the lower end of the upper end part 1, and the second upper end annular bulge of the sealing element 2 is contacted with the first annular groove of the upper end part 1;

the annular spring 3 is a third annular body, the third annular body of the annular spring 3 is a revolving body, the axial section of the third annular body of the annular spring 3 is a concentric circle, the upper half part of the outer surface of the third annular body of the annular spring 3 is a third upper end semicircular section annular surface, and the lower half part of the outer surface of the third cylindrical body of the annular spring 3 is a third lower end semicircular section annular surface;

the axis of a revolving body of the annular spring 3 is superposed with the axis of a revolving body of the upper end part 1, the annular spring 3 is positioned in a second outer side annular groove of the sealing element 2, a third upper end semicircular section annular surface of the annular spring 3 is contacted with the second upper end annular groove of the sealing element 2, and a third lower end semicircular section annular surface of the annular spring 3 is contacted with the second lower end annular groove of the sealing element 2;

the lower end part 4 is a fourth cylinder, the fourth cylinder of the lower end part 4 is a revolving body, the upper end of the fourth cylinder of the lower end part 4 is provided with a fourth inner flange, the upper surface of the fourth inner flange of the lower end part 4 is a fourth upper end concentric circular ring surface, the fourth upper end concentric circular ring surface of the lower end part 4 is provided with a circle of fourth upper end annular groove, the axial section of the fourth upper end annular groove of the lower end part 4 is rectangular, the fourth upper end annular groove of the lower end part 4 is composed of three surfaces, the bottom surface of the fourth upper end annular groove of the lower end part 4 is a fourth middle concentric circular ring surface, the side surface of the fourth upper end annular groove of the lower end part 4 close to the revolving body axis of the lower end part 4 is a fourth inner cylindrical surface, the side surface of the fourth upper end annular groove of the lower end part 4 far away from the revolving body axis of the lower end part 4 is a fourth outer cylindrical surface, the fourth middle concentric circular ring surface of the, the shaft section of the fourth annular groove of the lower end part 4 is V-shaped, and the revolution axis of the fourth annular groove of the lower end part 4 is superposed with the revolution axis of the lower end part 4;

the axis of the revolving body of the lower end part 4 is coincident with the axis of the revolving body of the upper end part 1, the lower end part 4 is positioned at the lower end of the upper end part 1, the fourth upper end concentric circular ring surface of the lower end part 4 is contacted with the first circular plane of the upper end part 1, the lower end part 4 is connected with the upper end part 1 through a screw, the sealing element 2 is positioned in the fourth upper end annular groove of the lower end part 4, the second lower end annular bulge of the sealing element 2 is contacted with the fourth annular groove of the lower end part 4, the lower end part 4 is a lower part of a mechanical connection interface in a liquid phase charging shell, and the liquid phase charging is positioned at the;

the sealing element 2 is made of polytetrafluoroethylene;

the annular spring 3 is made of spring steel;

the axial section of the first annular groove of the upper end part 1 is inverted V-shaped, and the included angle of two sides of the inverted V-shaped axial section of the first annular groove of the upper end part 1 is 107-113 degrees;

the axial section of the fourth annular groove of the lower end part 4 is V-shaped, and the included angle of the two V-shaped sides of the axial section of the fourth annular groove of the lower end part 4 is 107-113 degrees;

the section of the second upper end annular bulge shaft of the sealing element 2 is inverted V-shaped, and the included angle of two sides of the inverted V-shaped section of the second upper end annular bulge shaft of the sealing element 2 is 94-103 degrees;

the section of the second lower end annular protruding shaft of the sealing element 2 is V-shaped, and the included angle of the two V-shaped sides of the section of the second lower end annular protruding shaft of the sealing element 2 is 94-103 degrees;

the axial section of the second lower end annular groove of the sealing element 2 is arc-shaped, the axial section of the second upper end annular groove of the sealing element 2 is arc-shaped, and the arc-shaped diameter of the axial section of the second upper end annular groove of the sealing element 2 is the same as that of the axial section of the second lower end annular groove of the sealing element 2;

the axial cross section of the third ring body of the annular spring 3 is concentric, and the ratio of the major circle diameter of the axial cross section of the third ring body of the annular spring 3 to the circular arc diameter of the axial cross section of the second upper end annular groove of the seal element 2 is 1: 2.3 to 3.4;

the axial cross section of the third ring body of the annular spring 3 is concentric, and the ratio of the small diameter to the large diameter of the axial cross section of the third ring body of the annular spring 3 is 1: 1.3 to 1.8.

The sealing device suitable for corrosive liquid comprises the following steps:

step 1: filling the liquid charge into the lower end part 4;

step 2: assembling the sealing element 2 with the annular spring 3;

and step 3: assembling the annular spring 3 with the lower end part 4;

and 4, step 4: with upper end part 1 and the assembly of lower extreme part 4, upper end part 1 and the assembly of lower extreme part 4 back, the second upper end annular of the sealed original paper 2 of first annular groove extrusion of upper end part 1 is protruding, the second upper end annular of the sealed original paper 2 of the protruding extrusion of second upper end annular of sealed original paper 2 is recessed, the third upper end semicircle cross-section torus of sealed original paper 2 extrusion annular spring 3, make the third ring body of annular spring 3 receive the axial extrusion, the concentric circular of the third ring body axial cross-section of annular spring 3 becomes concentric ellipse after the extrusion, the third ring body axial cross-section outline of annular spring 3 after receiving the extrusion is oval, the oval minor axial length of the oval of the third ring body axial cross-section outline of annular spring 3 after receiving the extrusion is 1 with the ratio of major axial length: 1.15 ~ 1.18, the annular spring 3 that receives axial extrusion continues the downward transmission of axial force, the second lower extreme annular groove of the third lower extreme semi-circular section torus extrusion seal original 2 of annular spring 3, the second lower extreme annular groove extrusion seal original 2 of seal original 2 is protruding, the fourth annular groove of the protruding extrusion lower extreme part 4 of second lower extreme annular of seal original 2, because the protruding fourth annular groove of the protruding extrusion lower extreme part 4 of second lower extreme annular of seal original 2 extrudees each other with the fourth annular groove of lower extreme part 4, make the contact surface of seal original 2 and lower extreme part 4 have the leakproofness, because the first annular groove of upper end part 1 extrudees each other with the second upper end annular of seal original 2, make upper end part 1 and the contact surface of seal original 2 have the leakproofness.

The present invention may adopt any one of the following 5 modes:

implementation mode 1: the right end of the sealing element 2 is provided with an annular part, the axial section of the annular part is V-shaped, and the V-shaped opening of the annular part points to the axis of the annular part.

Implementation mode 2: the left end of the sealing element 2 is provided with an annular part, the axial section of the annular part is in a cross shape, the annular part is made of stainless steel 304, the annular part is supported in an annular groove in the second outer side of the sealing element 2, the upper end of the sealing element 2 is in contact with an upper end part 1, and the lower end of the sealing element 2 is in contact with a lower end part 4.

Implementation mode 3: the left end of the sealing element 2 is provided with an annular part, the axial section of the annular part is X-shaped, the annular part is made of polytetrafluoroethylene, the upper end of the annular part is in contact with the upper end part 1, and the lower end of the upper end part 1 is in contact with the lower end part 4.

Implementation mode 4: further comprising the steps of:

step 1: filling the liquid charge into the lower end part 4;

step 2: assembling the sealing element 2 with the annular spring 3;

and step 3: assembling an annular spring 3 and a lower end part 4, installing 4 alarms outside a sealing element 2, wherein the lower end of each alarm is provided with a detection joint, and when the detection joint detects that the detection joint is contacted with liquid, the alarm gives an alarm;

and 4, step 4: with upper end part 1 and the assembly of lower extreme part 4, upper end part 1 and the assembly of lower extreme part 4 back, the second upper end annular of the sealed original paper 2 of first annular groove extrusion of upper end part 1 is protruding, the second upper end annular of the sealed original paper 2 of the protruding extrusion of second upper end annular of sealed original paper 2 is recessed, the third upper end semicircle cross-section torus of sealed original paper 2 extrusion annular spring 3, make the third ring body of annular spring 3 receive the axial extrusion, the concentric circular of the third ring body axial cross-section of annular spring 3 becomes concentric ellipse after the extrusion, the third ring body axial cross-section outline of annular spring 3 after receiving the extrusion is oval, the oval minor axial length of the oval of the third ring body axial cross-section outline of annular spring 3 after receiving the extrusion is 1 with the ratio of major axial length: 1.15 ~ 1.18, the annular spring 3 that receives axial extrusion continues the downward transmission of axial force, the second lower extreme annular groove of the third lower extreme semi-circular section torus extrusion seal original 2 of annular spring 3, the second lower extreme annular groove extrusion seal original 2 of seal original 2 is protruding, the fourth annular groove of the protruding extrusion lower extreme part 4 of second lower extreme annular of seal original 2, because the protruding fourth annular groove of the protruding extrusion lower extreme part 4 of second lower extreme annular of seal original 2 extrudees each other with the fourth annular groove of lower extreme part 4, make the contact surface of seal original 2 and lower extreme part 4 have the leakproofness, because the first annular groove of upper end part 1 extrudees each other with the second upper end annular of seal original 2, make upper end part 1 and the contact surface of seal original 2 have the leakproofness.

Implementation mode 5: further comprising the steps of:

step 1: filling the liquid charge into the lower end part 4;

step 2: assembling the sealing element 2 with the annular spring 3;

and step 3: assembling the annular spring 3 with the lower end part 4;

and 4, step 4: with upper end part 1 and the assembly of lower extreme part 4, upper end part 1 and the assembly of lower extreme part 4 back, the second upper end annular of the sealed original paper 2 of first annular groove extrusion of upper end part 1 is protruding, the second upper end annular of the sealed original paper 2 of the protruding extrusion of second upper end annular of sealed original paper 2 is recessed, the third upper end semicircle cross-section torus of sealed original paper 2 extrusion annular spring 3, make the third ring body of annular spring 3 receive the axial extrusion, the concentric circular of the third ring body axial cross-section of annular spring 3 becomes concentric ellipse after the extrusion, the third ring body axial cross-section outline of annular spring 3 after receiving the extrusion is oval, the oval minor axial length of the oval of the third ring body axial cross-section outline of annular spring 3 after receiving the extrusion is 1 with the ratio of major axial length: 1.15-1.18, the annular spring 3 which is axially extruded continuously transmits the axial force downwards, the second lower end annular groove of the sealing element 2 is extruded by the third lower end semicircular section annular surface of the annular spring 3, the second lower end annular groove of the sealing element 2 is extruded by the second lower end annular protrusion of the sealing element 2, the fourth annular groove of the lower end part 4 is extruded by the second lower end annular protrusion of the sealing element 2, the contact surface of the sealing element 2 and the lower end part 4 has sealing performance because the second lower end annular protrusion of the sealing element 2 and the fourth annular groove of the lower end part 4 are extruded mutually, the contact surface of the upper end part 1 and the sealing element 2 has sealing performance because the first annular groove of the upper end part 1 and the second upper end annular protrusion of the sealing element 2 are extruded mutually, the temperature sensor and the pressure sensor are installed at the lower end of the middle part 1, the upper end of the middle part of the upper end part 1 displays temperature and pressure results, the pressure of the internal liquid is increased along with the temperature rise, and the relation between the pressure and the temperature can be theoretically calculated, so that the internal temperature and pressure results can be observed at any time and compared with the theoretical calculation results, if the pressure and temperature data accord with the theoretical calculation results, the internal sealing is good, and if the pressure is lower than the theoretical calculation results at the temperature, leakage occurs.

The sealing device suitable for corrosive liquid provided by the invention has the following technical effects: inlay the spring coil in the inside dress of polytetrafluoroethylene, improve polytetrafluoroethylene's compression elasticity through the spring coil for the assembly of polytetrafluoroethylene and spring coil has two characteristics of good elasticity and corrosion resistance simultaneously, and during polytetrafluoroethylene and metal casing extrusion contact, the assembly of polytetrafluoroethylene and spring coil takes place elastic deformation under the pressure effect, supports polytetrafluoroethylene by the spring coil, makes the laminating that polytetrafluoroethylene and metal casing can be good, realizes sealed effect. The polytetrafluoroethylene material and the high-energy liquid-phase fuel do not generate chemistry, so that the warhead shell meets the requirements of corrosion resistance and sealing performance at the mechanical interface. The reliable leakproofness of the corrosive liquid charging warhead is guaranteed in the long-term storage process.

Drawings

Fig. 1 is a schematic structural diagram of a sealing device suitable for corrosive liquids. 1. Upper end part, 2, sealing element, 3, annular spring, 4, lower extreme part.

Detailed Description

The present invention is further described in detail with reference to the drawings and examples, it should be noted that the present invention is not limited to the following examples, and equivalent changes based on the technical scheme of the present invention are within the scope of the present invention.