A lead seal device and pressure vessel

Abstract

The utility model provides a kind of lead sealing device and pressure vessel, it is related to strain measurement auxiliary technical field, device includes mounting seat, lead sealing plug, lead protection cover and nut, one end of mounting seat is connected with pressure vessel, another end is provided with cavity, the incoming line end of lead sealing plug is embedded in cavity, the incoming line end outer wall of lead sealing plug is provided with sealing groove, sealing groove is embedded with sealing ring, sealing ring and the cavity wall of cavity abut, the outgoing line end of lead sealing plug is equipped with lead protection cover, the outgoing line end outer wall of lead sealing plug is provided with step plate peripherally, the lower surface of step plate and the other end of mounting seat abut, nut is equipped with the connecting place of lead protection cover and lead sealing plug, and with the upper surface of step plate abut, the position of mounting seat and lead sealing plug corresponding respectively is provided with through hole, the lead of sensor in pressure vessel is sequentially passed through through hole, and is connected with aviation socket in lead protection cover.The utility model can better seal lead.

Description

TECHNICAL FIELD

[0001] The utility model relates to strain measurement auxiliary technical field, specifically, a lead seal device and pressure vessel are provided. BACKGROUND

[0002] Strain measurement is an important content of pressure vessel strength detection, which includes inner wall strain measurement and outer wall strain measurement. When performing inner wall strain measurement, the sensor needs to be installed on the inner wall of the pressure vessel, and the signal of the sensor is transmitted to the outside of the container through the lead. In order to ensure that the pressure vessel can maintain a sealed state during the inner wall strain test, a lead sealing device is needed to lead the lead of the sensor pasted on the inner wall out of the container.

[0003] In the prior art, the lead is usually passed through the sealing gasket with a hole in the lead sealing device, and then it is installed in the sealing hole. The lead sealing device is screwed into the mounting hole through threaded connection, and then the sealing glue is poured in to realize sealing. Although this can realize the sealing effect, when the lead sealing device is screwed into the mounting hole through threaded connection, a large torque is needed to realize good sealing effect, which is too time-consuming and laborious, and may also cause the sensor lead to be entangled, increasing the difficulty of subsequent wiring. After pouring in the sealing glue, the sealing glue may flow out along the sensor lead and solidify into a hard shell at the end of the lead. In this case, if the lead is bumped, it is easy to cause the lead to break, affecting the use. UTILITY MODEL CONTENT

[0004] The utility model aims at solving at least one of the above problems.

[0005] To solve the above problems, the utility model provides a lead sealing device and a pressure vessel.

[0006] The utility model provides a kind of lead sealing device, including mounting seat 1, lead sealing plug 2, lead protection cover 3 and screw cap 4, one end of the mounting seat 1 is connected with pressure vessel 6, another end is equipped with cavity, the lead-in end of the lead sealing plug 2 is embedded in the cavity, the lead-in end outer wall of the lead sealing plug 2 is equipped with sealing groove, sealing ring 21 is embedded in the sealing groove, the cavity wall of the sealing ring 21 and the cavity is abutted, the lead-out end outer wall of the lead sealing plug 2 is equipped with step plate 22, the lower surface of the step plate 22 and the other end of the mounting seat 1 are abutted, one end of the lead protection cover 3 is sleeved in the lead-out end of the lead sealing plug 2 and is abutted with the upper surface of the step plate 22, the screw cap 4 is sleeved in the connection place of the lead protection cover 3 and the lead sealing plug 2, and is abutted with the upper surface of the step plate 22, one end of the mounting seat 1 is equipped with first through hole communicated with the cavity, the lead sealing plug 2 is equipped with second through hole communicated with the first through hole, the lead 62 of sensor 61 in the pressure vessel 6 is sequentially passed through the first through hole and second through hole, and is connected with the aviation socket 31 in the lead protection cover 3.

[0007] Optionally, the lead sealing device further comprises a secondary sealing screw cap, the secondary sealing screw cap is used to replace the lead protection cover when permeating, and is sleeved on the lead-out end of the lead sealing plug.

[0008] Optionally, the lead-out end of the lead sealing plug comprises a lead-out port and a sealing plug body, the secondary sealing screw cap is sleeved on the lead-out port, the diameter of the lead-out port is smaller than the diameter of the sealing plug body, a stepped recess is formed at the connection position of the lead-out port and the sealing plug body, a gasket is arranged in the stepped recess, and the gasket is abutted with the lower surface of the secondary sealing screw cap.

[0009] Optionally, the lead-out port is provided with external threads matched with the secondary sealing screw cap, and the lead-out port is threadedly connected with the secondary sealing screw cap.

[0010] Optionally, the second through hole of the lead sealing plug comprises a first sealing through hole and a second sealing through hole, the first sealing through hole is formed at the lead-out end of the lead sealing plug, the second sealing through hole is formed at the lead-in end of the lead sealing plug, the diameter of the first sealing through hole is smaller than the diameter of the second sealing through hole, the second sealing through hole is tapered, and the diameter of the second sealing through hole gradually increases along the direction close to the pressure vessel, and sealing glue is filled in the first sealing through hole and the second sealing through hole.

[0011] Optionally, the second through hole of the lead sealing plug is tapered, the diameter of the through hole of the lead sealing plug gradually increases along the direction close to the pressure vessel, and sealing glue is filled in the through hole of the lead sealing plug.

[0012] Optionally, the number of the sealing grooves and the sealing rings is multiple, and the sealing grooves and the sealing rings are one-to-one corresponding.

[0013] Optionally, the sealing ring is an O-shaped sealing ring.

[0014] Optionally, the aviation socket is connected to the lead protection cover away from the lead sealing plug through a bolt.

[0015] In the second aspect, the utility model provides a kind of pressure vessel, including the lead sealing device as described in the first aspect.

[0016] The lead sealing device, the pressure vessel and the pressure vessel of the utility model have the following beneficial effects:

[0017] One end of the mounting seat is connected to the pressure vessel, and the other end is installed with the lead sealing plug, and the first through hole and the second through hole are respectively arranged at the corresponding positions of the mounting seat and the lead sealing plug, and the lead 62 passes through the first through hole and the second through hole in sequence, so that the lead sealing plug 2 can be installed on the pressure vessel 6 more easily, and the lead sealing plug does not need to be rotated, and the problem of lead winding is not caused. The step plate provided on the outlet end of the lead sealing plug abuts against the other end of the cavity of the mounting seat, and the position of the lead sealing plug is further fixed by the action of the nut, which enhances the structural stability of the whole device, avoids loosening caused by vibration or external force, and the sealing groove is arranged on the outer wall of the inlet end of the lead sealing plug and embedded with the sealing ring, so that the sealing ring is in close contact with the cavity wall of the mounting seat, which can effectively fill the gap between the inlet end of the lead sealing plug and the cavity, so that the lead sealing plug 2 and the mounting seat 1 are sealed and connected. At the same time, without using a large torque, the overall sealing property of the device can be improved, and better sealing effect can be achieved. In addition, the lead protection cover is sleeved on the outlet end of the lead sealing plug, which can protect the lead that passes out of the outlet end of the lead sealing plug. Even if the sealant may flow out along the lead, it is solidified to form a hard shell at the end of the lead, i.e. the outlet end of the lead sealing plug. Through the protection of the lead protection cover, the lead will not be physically damaged, such as bumping, abrasion and cutting, so as to ensure the reliability and good electrical performance of the lead connection. In addition, through the aviation socket, the external signal line can be quickly plugged and unplugged, which meets different task requirements. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic diagram of a lead sealing device provided by an embodiment of the utility model;

[0019] Figure 2 Fig. 2 is another structural schematic diagram of a lead sealing device provided by an embodiment of the utility model;

[0020] Figure 3The structure schematic view of the lead sealing plug is provided for the embodiment of the utility model.

[0021] Figure 4 The structure schematic view of the lead sealing plug is provided for the embodiment of the utility model.

[0022] Mark explanation:

[0023] 1, mounting seat, 2, lead sealing plug, 21, sealing ring, 22, step plate, 23, first sealing through hole, 24, second sealing through hole, 3, lead protection cover, 31, aviation socket, 4, nut, 5, secondary sealing nut, 51, gasket, 6, pressure vessel, 61, sensor, 62, lead, 7, sealing glue. Specific implementation

[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings. Although some embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be realized in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for illustrative purposes, and are not used to limit the protection scope of the utility model.

[0025] The term "comprising" and its variants used herein are open and inclusive, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiment". Related definitions of other terms will be given in the following description. It should be noted that the "first", "second", etc. concepts mentioned in the utility model are only used to distinguish different devices, modules or units, and are not used to limit the functions performed by these devices, modules or units.

[0026] It should be noted that the modification of "one" and "multiple" mentioned in the utility model is illustrative and not restrictive, and those skilled in the art should understand that unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0027] In view of the problems in the above-mentioned related technology, the embodiment provides a lead sealing device and a pressure vessel.

[0028] As Figure 1As shown, the utility model embodiment provides a kind of lead sealing device, including mounting seat 1, lead sealing plug 2, lead protection cover 3 and nut 4, one end of mounting seat 1 is connected with pressure vessel 6, another end is provided with cavity, the incoming line end of lead sealing plug 2 is embedded in the cavity, the incoming line end outer wall of lead sealing plug 2 is provided with sealing groove, sealing ring 21 is embedded in the sealing groove, sealing ring 21 and the cavity wall of the cavity abut, the outgoing line end outer wall of lead sealing plug 2 is provided with step plate 22, the lower surface of step plate 22 and the other end of mounting seat 1 abut, one end of lead protection cover 3 is sleeved in the outgoing line end of lead sealing plug 2 and with the upper surface of step plate 22 is resisted, nut 4 is sleeved in the connecting portion of lead protection cover 3 and lead sealing plug 2, and with the upper surface of step plate 22 abuts, one end of mounting seat 1 is provided with first through-hole communicated with the cavity, lead sealing plug 2 is provided with second through-hole communicated with the first through-hole, the lead 62 of sensor 61 in pressure vessel 6 sequentially passes through the first through-hole and second through-hole, and is connected with the aviation socket 31 in lead protection cover 3.

[0029] Specifically, one end of the mounting seat 1 is connected with the pressure container 6, and the other end is provided with a cavity, which is matched with the shape of the lead seal plug 2, so that the lead-in end of the lead seal plug 2 is embedded in the cavity, the outer wall of the lead-in end of the lead seal plug 2 is provided with a sealing groove, and the sealing ring 21 is embedded in the sealing groove, and the sealing ring 21 abuts against the cavity wall to fill the gap between the lead-in end of the lead seal plug 2 and the cavity, thereby realizing the sealing effect, the lead-out end of the lead seal plug 2 is sleeved with the lead protection cover 3, and the lead protection cover 3 is hollow inside to provide a lead placement space, the outer wall of the lead-out end of the lead seal plug 2 is provided with a stepped plate 22 in the circumferential direction, the stepped plate 22 extends in the radial direction of the lead-out end of the lead seal plug 2, and the lower surface of the stepped plate 22 abuts against the other end of the mounting seat 1, thereby clamping the lead-in end of the lead seal plug 2 in the cavity of the mounting seat 1 and clamping the lead-out end of the lead seal plug 2 outside the cavity of the mounting seat 1, the nut 4 is provided with a through hole matched with the lead protection cover 3, so that the nut 4 can be sleeved at the connection between the lead protection cover 3 and the lead seal plug 2, and abut against the upper surface of the stepped plate 22, further clamping the lead-in end of the lead seal plug 2 in the cavity of the mounting seat 1, the first through hole and the second through hole are respectively provided at the corresponding positions of the mounting seat 1 and the lead seal plug 2, the two ends of the first through hole are respectively communicated with the cavity and the opening of the pressure container 6, and the two ends of the second through hole are respectively communicated with the cavity and the lead protection cover 3, the lead 62 of the sensor 61 in the pressure container 6 passes through the first through hole and the second through hole in sequence to be connected with the aviation socket 31 in the lead protection cover 3, and after connection, sealing glue 7 can be injected into the second through hole of the lead seal plug 2 to ensure the sealing effect. After sealing, the quick plug-in and plug-out aviation plug matched with the aviation socket 31 can be connected with the external connecting line to obtain the data transmitted by the sensor 61.

[0030] Exemplarily, the nut 4 can include a limiting portion sleeved outside the lead-out end of the lead seal plug 2 and a sleeve portion sleeved outside the mounting seat 1, the sleeve portion is provided with an internal thread, the mounting seat 1 is provided with an external thread matched with the internal thread, the nut 4 and the mounting seat 1 can be threadedly connected, and by screwing the nut 4, the limiting portion of the nut 4 is tightly abutted against the stepped plate of the lead seal plug 2 to adjust the fastening degree of the lead seal plug 2 installed in the mounting seat 1. The through hole in the lead seal plug 2 can pass through a plurality of leads 62, but in order to ensure the sealing quality and measurement requirements, at most 16 leads 62 can be passed through.

[0031] In this embodiment, one end of the mounting seat 1 is connected with the pressure container 6, and the other end is provided with the lead seal plug 2, and the first through hole and the second through hole are respectively arranged at the corresponding positions of the mounting seat 1 and the lead seal plug 2, and the lead wire 62 passes through the first through hole and the second through hole in sequence, so that the lead seal plug 2 can be more easily installed on the pressure container 6, and the lead seal plug 2 does not need to be rotated, and the lead wire 62 will not be wound. The stepped plate 22 arranged at the outgoing end of the lead seal plug 2 abuts against the other end of the mounting seat 1 provided with the cavity, and the screw cap 4 is further used to fix the position of the lead seal plug 2, thereby enhancing the structural stability of the whole device, avoiding loosening caused by vibration or external force, and further, the sealing groove is arranged on the outer wall of the incoming end of the lead seal plug 2 and the sealing ring 21 is embedded, so that the sealing ring 21 is in close contact with the cavity wall of the mounting seat 1, the gap between the incoming end of the lead seal plug 2 and the cavity can be effectively filled, the lead seal plug 2 and the mounting seat 1 are in sealed connection, and the overall sealing property of the device can be improved without using a large torque, thereby achieving better sealing effect. In addition, the lead protection cover 3 sleeved on the outgoing end of the lead seal plug 2 can protect the lead wire 62 passing out of the outgoing end of the lead seal plug 2, even if the sealant may flow out along the lead wire 62, and solidify to form a hard shell at the end of the lead wire, that is, the outgoing end of the lead seal plug 2, and the lead wire 62 will not be physically damaged such as bumping, abrasion and cutting, thereby ensuring the reliability of the connection of the lead wire 62 and good electrical performance, and further, the aviation socket 31 can facilitate quick plugging and unplugging of the external signal line, thereby meeting different task requirements.

[0032] Optionally, the lead sealing device further comprises a secondary sealing screw cap 5, and the secondary sealing screw cap 5 is used to replace the lead protection cover 3 when permeation occurs, that is, when the through hole of the lead seal plug 2 is permeated, the lead sealing device is not needed to obtain data, although the lead sealing device is detachable from the pressure container, but when permeation occurs, if the lead sealing device is detached, the permeation will be more serious, so the lead sealing device needs to be plugged. At this time, the lead protection cover 3 can be detached, the lead wire is cut off, the secondary sealing screw cap 5 is sleeved on the outgoing end of the lead seal plug 2, so as to block the permeation and complete the sealing, so as to facilitate the next work.

[0033] Specifically, as shown in the drawings, the lead sealing device further comprises a secondary sealing screw cap 5, and the secondary sealing screw cap 5 is used to replace the lead protection cover 3 when permeation occurs, that is, when the through hole of the lead seal plug 2 is permeated, the lead sealing device is not needed to obtain data, although the lead sealing device is detachable from the pressure container, but when permeation occurs, if the lead sealing device is detached, the permeation will be more serious, so the lead sealing device needs to be plugged. At this time, the lead protection cover 3 can be detached, the lead wire is cut off, the secondary sealing screw cap 5 is sleeved on the outgoing end of the lead seal plug 2, so as to block the permeation and complete the sealing, so as to facilitate the next work. Figure 2

[0034] ​Optionally, the wire outlet end of the wire sealing plug 2 comprises a wire outlet and a sealing plug body, the secondary sealing screw cap 5 is sleeved on the wire outlet, the diameter of the wire outlet is smaller than that of the sealing plug body, a stepped groove is arranged at the joint of the wire outlet and the sealing plug body, a gasket 51 is arranged in the stepped groove, and the gasket 51 abuts against the lower surface of the secondary sealing screw cap 5.

[0035] Specifically, as shown in Figure 2 the wire outlet end of the wire sealing plug 2 comprises a wire outlet and a sealing plug body, the secondary sealing screw cap 5 is sleeved on the wire outlet, the diameter of the wire outlet is smaller than that of the sealing plug body, and a stepped groove is arranged at the joint of the wire outlet and the sealing plug body, a gasket 51 is arranged in the stepped groove, and the gasket 51 abuts against the lower surface of the secondary sealing screw cap 5. After the wire protection cover 3 is removed and the wire is cut off after the penetration of the through hole of the wire sealing plug 2, the gasket 51 can be installed in the stepped groove, and then the secondary sealing screw cap 5 is sleeved on the wire outlet of the wire sealing plug 2, so that the gasket 51 completely fills the gap between the secondary sealing screw cap 5 and the wire sealing plug 2, thereby completing the sealing.

[0036] Optionally, the wire outlet is provided with external threads matched with the secondary sealing screw cap 5, and the wire outlet is threadedly connected with the secondary sealing screw cap 5.

[0037] Specifically, the wire outlet is provided with external threads matched with the secondary sealing screw cap 5, and the wire outlet is threadedly connected with the secondary sealing screw cap 5, and the fastening degree between the wire outlet and the secondary sealing screw cap 5 can be controlled by screwing the secondary sealing screw cap 5.

[0038] Optionally, the second through hole of the wire sealing plug 2 comprises a first sealing through hole 23 and a second sealing through hole 24, the first sealing through hole 23 is arranged at the wire outlet end of the wire sealing plug 2, the second sealing through hole 24 is arranged at the wire inlet end of the wire sealing plug 2, the diameter of the first sealing through hole 23 is smaller than that of the second sealing through hole 24, the second sealing through hole 24 is tapered, the diameter of the second sealing through hole 24 gradually increases along the direction close to the pressure container 6, and the first sealing through hole 23 and the second sealing through hole 24 are both filled with sealing glue 7.

[0039] Specifically, as shown in Figure 3As shown, the through hole of the lead seal plug 2 includes a first sealing through hole 23 and a second sealing through hole 24, the number of the first sealing through hole 23 can be set to be multiple, the first sealing through hole 23 and the second sealing through hole 24 are communicated to pass the lead 61, the first sealing through hole 23 is arranged at the outgoing end of the lead seal plug 2, the second sealing through hole 24 is arranged at the incoming end of the lead seal plug 2, the diameter of the first sealing through hole 23 is smaller than the minimum diameter of the second sealing through hole 24, the second sealing through hole 24 is tapered, and the diameter of the second sealing through hole 24 gradually increases along the direction close to the pressure container 6, that is, the diameter of the second sealing through hole 24 gradually decreases along the direction away from the pressure container 6, that is, the diameter of the through hole of the lead seal plug 2 gradually decreases along the direction away from the pressure container 6, so as to reduce the area of penetration and thus reduce the risk of penetration, and the first sealing through hole 23 and the second sealing through hole 24 are both filled with sealing glue 7 to avoid the risk of penetration.

[0040] Optionally, the second through hole of the lead seal plug 2 is tapered, the diameter of the through hole of the lead seal plug 2 gradually increases along the direction close to the pressure container 6, and the through hole of the lead seal plug 2 is filled with sealing glue 7.

[0041] Specifically, as shown in the drawings, Figure 4 the through hole of the lead seal plug 2 is tapered, the diameter of the through hole of the lead seal plug 2 gradually increases along the direction close to the pressure container 6, that is, the diameter of the second sealing through hole 24 gradually decreases along the direction away from the pressure container 6, so as to reduce the area of penetration and thus reduce the risk of penetration, and the through hole of the lead seal plug 2 is filled with sealing glue 7 to avoid the risk of penetration.

[0042] Optionally, the number of the sealing grooves and the sealing rings 21 is multiple, and the sealing grooves and the sealing rings 21 are one-to-one corresponding.

[0043] Specifically, the number of the sealing grooves and the sealing rings 21 is multiple, and the sealing grooves and the sealing rings 21 are one-to-one corresponding, so as to ensure the sealing effect.

[0044] Optionally, the sealing ring 21 is an O-shaped sealing ring.

[0045] Specifically, the sealing ring 21 is an O-shaped sealing ring, which can provide stable sealing effect and simplify the installation process, thus helping to improve work efficiency.

[0046] Optionally, the aviation socket 31 is connected to the lead protection cover 3 away from the end of the lead seal plug 2 through bolts.

[0047] Specifically, as shown in the drawings, Figure 1As shown, the aviation socket 31 is connected to the lead protection cover 3 away from the lead sealing plug 2 by bolts, the end of the lead protection cover 3 away from the lead sealing plug 2 is provided with bolt holes, so that the aviation socket 31 is detachably connected with the lead protection cover 3 through bolts, when installing the lead sealing device, the aviation socket 31 can be detached from the lead protection cover 3, the lead 62 is led out of the lead protection cover 3, and the lead 62 is welded on the female head on the aviation socket 31, then the aviation socket 31 is connected with the lead protection cover 3 through bolts, the lead protection cover 3 is installed on the lead sealing plug 2, then the lead sealing plug 2 is installed in the mounting seat 1 and is fixed by the nut 4, so that the workload of strain measurement on site can be greatly reduced.

[0048] The pressure vessel provided by the embodiment of the utility model comprises the lead sealing device as described above.

[0049] The beneficial effects of the pressure vessel of the embodiment relative to the prior art are the same as those of the lead sealing device, and will not be repeated here.

[0050] Although the utility model discloses as above, the protection scope of the utility model is not only limited to this. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall into the protection scope of the utility model.

Claims

1. A wire seal device, characterized by, The utility model provides a kind of lead seal, including mounting seat (1), lead seal plug (2), lead protection cover (3) and screw cap (4), one end of the mounting seat (1) is connected with pressure vessel (6), the other end is provided with cavity, the lead-in end of the lead seal plug (2) is embedded in the cavity, the lead-in end outer wall of the lead seal plug (2) is provided with sealing groove, the sealing ring (21) is embedded in the sealing groove, the sealing ring (21) is in contact with the cavity wall, the lead-out end outer wall of the lead seal plug (2) is provided with step plate (22) circumferentially, the lower surface of the step plate (22) is in contact with the other end of the mounting seat (1), one end of the lead protection cover (3) is sleeved in the lead-out end of the lead seal plug (2) and is in contact with the upper surface of the step plate (22), the screw cap (4) is sleeved in the connection place of the lead protection cover (3) and the lead seal plug (2), and is in contact with the upper surface of the step plate (22), one end of the mounting seat (1) is provided with first through hole communicated with the cavity, the lead seal plug (2) is provided with second through hole communicated with the first through hole, the lead (62) of sensor (61) in the pressure vessel (6) is sequentially passed through the first through hole and the second through hole, and is connected with the aviation socket (31) in the lead protection cover (3).

2. The lead seal apparatus of claim 1, wherein, Also include secondary sealing screw cap (5), the secondary sealing screw cap (5) is used to replace the lead protection cover (3) when permeating, and is sleeved in the lead-out end of the lead seal plug (2).

3. The lead seal apparatus of claim 2, wherein, The lead-out end of the lead seal plug (2) includes outlet and seal plug body, the secondary sealing screw cap (5) is sleeved in the outlet, the diameter of the outlet is less than the diameter of the seal plug body, the connecting place of the outlet and the seal plug body is provided with step groove, the gasket (51) is arranged in the step groove, and the gasket (51) is in contact with the lower surface of the secondary sealing screw cap (5).

4. The lead seal apparatus of claim 3 wherein, The outlet is provided with external thread matched with the secondary sealing screw cap (5), and the outlet is threadedly connected with the secondary sealing screw cap (5).

5. The lead seal apparatus of claim 1 wherein, The second through hole of the lead seal plug (2) includes first sealing through hole (23) and second sealing through hole (24), the first sealing through hole (23) is provided in the lead-out end of the lead seal plug (2), the second sealing through hole (24) is provided in the lead-in end of the lead seal plug (2), the diameter of the first sealing through hole (23) is less than the diameter of the second sealing through hole (24), the second sealing through hole (24) is tapered, and the diameter of the second sealing through hole (24) gradually increases along the direction close to the pressure vessel (6), and the first sealing through hole (23) and the second sealing through hole (24) are filled with sealing glue (7).

6. The lead seal apparatus of claim 1 wherein, The second through hole of the lead seal plug (2) is tapered, the diameter of the through hole of the lead seal plug (2) gradually increases along the direction close to the pressure vessel (6), and the through hole of the lead seal plug (2) is filled with sealing glue (7).

7. The lead seal apparatus of claim 1 wherein, The number of the sealing grooves and the sealing rings (21) is multiple, and the sealing grooves and the sealing rings (21) are one-to-one corresponding.

8. The lead seal apparatus of claim 1 wherein, The sealing ring (21) is an O-shaped sealing ring.

9. The lead seal apparatus of claim 1 wherein, The aviation socket (31) is bolted to the lead seal cover (3) away from the lead sealing plug (2).

10. A pressure vessel characterised in that, The lead sealing device comprises the lead sealing device as claimed in any one of claims 1 to 9.

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