CN217199278U

CN217199278U - Sampling steel cylinder

Info

Publication number: CN217199278U
Application number: CN202220064173.XU
Authority: CN
Inventors: 伏江峰; 王冬梅; 马翔; 王锐; 施多恒
Original assignee: Guoneng Baotou Coal Chemical Co ltd; China Shenhua Coal to Liquid Chemical Co Ltd
Current assignee: Guoneng Baotou Coal Chemical Co ltd; China Shenhua Coal to Liquid Chemical Co Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-08-16
Anticipated expiration: 2032-01-11

Abstract

The utility model relates to a sampling device field discloses a sampling steel bottle, connect the protective cap including setting up the first quick-operation joint on the steel bottle body and the spill that is used for pegging graft with first quick-operation joint, first quick-operation joint is equipped with the joint plug, and the periphery wall that connects the plug is equipped with first constant head tank, and the spill connects the protective cap be equipped with the protective cap slot that connects the plug adaptation, and the internal perisporium of protective cap slot is equipped with first constant head tank, and first constant head tank can imbed or break away from first constant head tank with receiving the drive. Through the technical scheme, the protective cap slot cover is established and can be sealed the sampling passageway of first quick-operation joint on connecting the plug to avoid the sampling passageway to produce and pollute, rust and phenomenon such as jam, the protective cap slot still plays the parcel effect to connecting the plug simultaneously, thereby avoids first quick-operation joint to produce when receiving the collision and warp, in order to play the guard action, guarantees that the sampling steel bottle can preserve for a long time, and can normal use after preserving.

Description

Sampling steel cylinder

Technical Field

The utility model relates to a sampling device field specifically relates to a sampling steel bottle.

Background

The steel cylinder for sampling liquefied petroleum gas is a stainless steel seamless gas cylinder suitable for sampling, storing and transporting ethylene, propylene, butadiene, liquefied petroleum gas, natural gas and other gases and liquids under the same operating conditions. Be equipped with two quick-operation joints that are used for connecting the sampling case hose on the current sampling steel bottle, one of them quick-operation joint is equipped with the joint plug, another quick-operation joint is equipped with the joint slot, the tip of joint plug and the tank bottom of joint slot all are equipped with the sampling passageway of intercommunication sampling steel bottle inner space, with the entry end and the exit end as the sampling steel bottle respectively, the sampling steel bottle is placing the in-process, two quick-operation joints directly expose in the air, moisture in the air, impurity such as dust can produce the pollution to the sampling passageway, phenomenons such as rust and jam, quick-operation joint also produces the deformation because of receiving the collision easily simultaneously, lead to unable hose with the sampling case to be connected, or there is the condition of gas leakage behind the hose connection with the sampling case. Therefore, the sampling steel cylinder cannot be used normally after being placed, and even potential safety hazards are caused by leakage of high-pressure gas.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the sampling steel bottle that prior art exists and placing the in-process, quick-operation joint directly exposes in the air, and the sampling passageway can produce and pollute, rust and phenomenon such as jam to and quick-operation joint produces deformation owing to receiving the collision, and then leads to the unable normal use's of sampling steel bottle after placing problem, provide a sampling steel bottle.

In order to realize the above-mentioned purpose, the utility model provides a sampling steel bottle, including set up the first quick-operation joint on the steel bottle body with be used for with the spill joint protective cap that first quick-operation joint pegged graft, first quick-operation joint is equipped with the joint plug, the periphery wall that connects the plug is equipped with first constant head tank, the spill joint protective cap is equipped with the protective cap slot with connect the plug adaptation, the internal perisporium of protective cap slot is equipped with first constant head tank, first constant head tank can imbed or break away from with the drive first constant head tank.

Preferably, the inner peripheral wall of the protective cap slot is provided with a first accommodating cavity for accommodating the first positioning element, the first accommodating cavity is perpendicular to the depth direction of the protective cap slot, and the first positioning element is suitable for being embedded into the first positioning end of the first positioning groove and can be driven to extend out of or into the first accommodating cavity; and/or

An inner sealing gasket made of elastic materials is arranged inside the concave joint protective cap, and the inner sealing gasket forms the groove bottom of the protective cap slot.

Preferably, a first elastic piece is arranged in the first accommodating cavity, and the first elastic piece is located between the first positioning piece and the cavity bottom of the first accommodating cavity and used for driving the first positioning end to extend out of the first accommodating cavity; and/or

The outer wall of the first positioning end, which is located in the depth direction of the protective cap slot, is obliquely arranged, so that when the connector plug moves out of the protective cap slot, the oblique outer wall of the first positioning end is pressed by the slot wall of the first positioning slot to drive the first positioning end to be separated from the first positioning slot.

Preferably, the first positioning groove is an annular groove body surrounding the connector plug and is arranged along the depth direction of the protective cap slot, the cross section profile of the first positioning groove is matched with the cross section profile of the first positioning end, and the first positioning piece is uniformly arranged in a plurality of circumferential directions of the protective cap slot.

Preferably, the sampling steel cylinder further comprises a second quick coupling arranged on the steel cylinder body and a convex coupling protective cap used for being plugged with the second quick coupling, the second quick coupling is provided with a coupling slot, the inner peripheral wall of the coupling slot is provided with a second positioning piece, the convex coupling protective cap is provided with a protective cap plug matched with the coupling slot, the outer peripheral wall of the protective cap plug is provided with a second positioning groove, and the second positioning piece can be embedded into or separated from the second positioning groove in a driven manner.

Preferably, the inner peripheral wall of the joint slot is provided with a second accommodating cavity for accommodating the second positioning element, the second accommodating cavity is perpendicular to the depth direction of the joint slot, and the second positioning element is suitable for being embedded into the second positioning end of the second positioning groove and extending out or into the second accommodating cavity in a driving manner.

Preferably, a second elastic piece is arranged in the second accommodating cavity, the second elastic piece is located between the second positioning piece and the cavity bottom of the second accommodating cavity, and the second elastic piece is used for driving the second positioning end to extend out of the second accommodating cavity; and/or

The second positioning end is obliquely arranged on the outer wall of the connector slot in the depth direction, so that when the protective cap plug moves out of the connector slot, the oblique outer wall of the second positioning end is pressed by the slot wall of the second positioning slot to drive the second positioning end to be separated from the second positioning slot.

Preferably, the second positioning groove is an annular groove body surrounding the protective cap plug, the depth direction of the joint slot is arranged, the cross-sectional profile of the second positioning groove is matched with that of the second positioning end, and the second positioning piece is uniformly arranged in the circumferential direction of the joint slot.

Preferably, the end face of the male connector protection cap provided with the protection cap plug is further provided with an outer sealing gasket, and the outer sealing gasket is made of an elastic material and surrounds the protection cap plug.

Preferably, the sampling steel cylinder further comprises two connecting devices, each connecting device comprises a connecting wire and a lantern ring, the connecting wire of one connecting device is connected with the concave joint protective cap, and the corresponding lantern ring is sleeved on the first quick joint; and the connecting wire of the other connecting device is connected with the convex joint protective cap, and the corresponding lantern ring is sleeved on the second quick joint.

Through the technical scheme, the concave joint protective cap is provided with the protective cap slot suitable for containing the joint plug, the protective cap slot sleeve is arranged on the joint plug to seal a sampling channel of the first quick joint, so that the sampling channel is prevented from being polluted, rusted, blocked and the like, and the protective cap slot also plays a wrapping role on the joint plug, so that the first quick joint is prevented from being deformed when being collided, so that the protective effect is achieved, the sampling steel cylinder can be stored for a long time, and the sampling steel cylinder can be normally used after being stored.

Drawings

Fig. 1 is a schematic structural view of an embodiment of a female joint protection cap according to the present invention;

FIG. 2 is a schematic view of the female coupling protective cap of FIG. 1 in connection with a first quick coupling;

FIG. 3 is a schematic structural view of an embodiment of the male connector protective cap of the present invention;

fig. 4 is a schematic view of the connection of the male connector protective cap to the second quick connector of fig. 3.

Description of the reference numerals

1. A female connector protective cap; 2. a first quick coupling; 3. a protective cap plug; 4. a connector plug; 5. a protective cap slot; 6. a first positioning groove; 7. a first positioning member; 8. a first elastic member; 9. an inner sealing gasket; 10. an outer seal gasket; 11. a connecting wire; 12. a collar; 13. a male connector protective cap; 14. a second positioning groove; 15. a second positioning member; 16. a second elastic member; 17. and a second quick coupling.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, "first, second, third, and fourth" are used only for distinguishing components, and do not represent an arrangement order or an importance degree.

The utility model provides a sampling steel bottle, including set up first quick-operation joint 2 on the steel bottle body and be used for with the spill joint protective cap 1 that first quick-operation joint 2 pegged graft, first quick-operation joint 2 is equipped with connects plug 4, the periphery wall that connects plug 4 is equipped with first constant head tank 6, spill joint protective cap 1 is equipped with the protective cap slot 5 with the 4 adaptations of joint plug, the internal perisporium of protective cap slot 5 is equipped with first constant head tank 7, first constant head tank 7 can imbed or break away from with driving first constant head tank 6.

Through the technical scheme, concave joint protective cap 1 is equipped with the protective cap slot 5 that is suitable for holding joint plug 4, protective cap slot 5 cover is established on joint plug 4 in order to seal the sampling passageway of first quick-operation joint 2, thereby avoid the sampling passageway to produce the pollution, phenomenons such as rust and jam, protective cap slot 5 still plays the parcel effect to joint plug 4 simultaneously, thereby avoid first quick-operation joint 2 to produce when receiving the collision and warp, in order to play the guard action, guarantee that the sampling steel bottle can preserve for a long time, and can normal use after preserving.

The utility model discloses do not limit the mounting structure of first locator piece 7, it is preferred, as in the embodiment shown in fig. 1, the internal perisporium of protective cap slot 5 is equipped with and is used for holding the first chamber that holds of first locator piece 7, just first hold the chamber with the depth direction of protective cap slot 5 is perpendicular, first locator piece 7 is suitable for the embedding the first locating terminal of first locator slot 6 can stretch out or stretch into with being driven the first chamber that holds. Of course, in other embodiments, the first receiving cavity may be inclined to the depth direction of the protective cap socket 5. Of course, in other embodiments, instead of providing the first receiving chamber on the inner circumferential wall of the protective cap socket 5, a movable first detent 7 may be provided at the end of the protective cap socket 5.

The utility model discloses do not restrict the structure that stretches into first constant head tank 6 to drive first constant head tank 7, it is preferred, as in the embodiment shown in fig. 1, first the intracavity that holds is equipped with first elastic component 8, just first elastic component 8 is located first constant head tank 7 with between the first chamber end that holds the chamber, in order to be used for the drive first constant head tank stretches out first chamber that holds.

Preferably, the first elastic member 8 is a spring, one end of the spring is connected to the first positioning member 7, the other end of the spring is connected to the bottom of the first accommodating cavity, in the depth direction of the first accommodating cavity, the circumferential profile of the spring and the circumferential profile of the first positioning member 7 are adapted to the circumferential profile of the first accommodating cavity, preferably, the first accommodating cavity comprises a first cavity section and a second cavity section arranged along the depth direction of the first accommodating cavity, the circumferential width of the first cavity section is greater than the circumferential width of the second cavity section, the first cavity section is adapted to accommodate the first positioning member 7, the circumferential profile of the first cavity section is adapted to the circumferential profile of the first positioning member 7, the second cavity section is adapted to accommodate the spring, the circumferential profile of the spring is adapted to the circumferential profile of the second cavity section, and when the spring is in an uncompressed state, its one end towards first locating member 7 stretches out the second cavity section and is located in the first cavity section, and the first locating end of first locating member 7 stretches into first holding chamber this moment.

The utility model discloses do not restrict, it is preferred to drive the structure that first locating piece 7 stretches out first constant head tank 6, as in the embodiment shown in fig. 1, first constant head is located the ascending slope of outer wall of 5 depth directions in protective cap slot sets up, so that connect plug 4 to during the outer removal of protective cap slot 5, the slope outer wall of first constant head receives the pressure and the drive of the cell wall of first constant head tank 6 first constant head breaks away from first constant head tank 6, first constant head can be for the round platform shape structure, also can be for four prismatic table structures.

Of course, in other embodiments, the first elastic member 8 may not be provided, but a pressing member of a rod structure may be provided at an end of the protective cap slot 5 or in the first accommodating cavity, where the first accommodating cavity is a through hole, so that one end of the pressing member, which is far away from the first positioning member 7, can extend out of the outer peripheral wall of the protective cap slot 5, at this time, the first positioning member 7 extends into the first positioning slot 6 by pressing the pressing member, and the first positioning member 7 extends out of the first positioning slot 6 by the pressure of the slot wall of the first positioning slot 6 on the inclined outer wall of the first positioning end. Of course, in other embodiments, the first elastic element 8 and the inclined outer wall of the first positioning end may not be provided, at this time, a push-pull element of a rod structure is provided at the end of the protective cap slot 5 or in the first accommodating cavity, at this time, the first accommodating cavity is a through hole, so that one end of the push-pull element, which is far away from the first positioning element 7, always extends out of the outer peripheral wall of the concave joint protective cap 1, one end of the push-pull element, which is close to the first positioning element 7, is fixedly connected with the first positioning element 7, and the first positioning element 7 is driven to extend into or out of the first positioning slot 6 by pushing or pulling the push-pull element.

The utility model discloses do not limit to the concrete structure of first constant head tank 6, it is preferred, as in the embodiment shown in fig. 1, first constant head tank 6 is for encircleing the cyclic annular cell body that connects plug 4, and follow the direction of depth of protective cap slot 5, the cross-sectional profile of first constant head tank 6 with the cross-sectional profile adaptation of first constant head tank to promote first constant head tank through pressure and remove, first locating piece 7 is followed protective cap slot 5's circumference evenly sets up a plurality ofly. Of course, in other embodiments, the first positioning groove 6 may also be a groove body with a shape matched with the first positioning end, and the first positioning groove 6 is provided in a number corresponding to the number of the first positioning pieces 7 along the circumferential direction of the joint plug 4.

Further, in order to form a better seal between the female connector protection cap 1 and the connector plug 4 when they are connected, as shown in the embodiment shown in fig. 1, an inner sealing gasket 9 made of an elastic material is provided inside the female connector protection cap 1, the inner sealing gasket 9 forms the bottom of the protection cap slot 5, and the inner sealing gasket 9 is provided with a through hole connected with the sampling channel. Of course, in other embodiments, the inner sealing gasket 9 may not be provided.

Further, the sampling steel cylinder still including set up the second quick-operation joint 17 on the steel cylinder body and be used for with the convex joint protective cap 13 that second quick-operation joint 17 pegged graft, second quick-operation joint 17 is equipped with the joint slot, the internal perisporium of joint slot is equipped with second setting element 15, convex joint protective cap 13 is equipped with the protective cap plug 3 with joint slot adaptation, the periphery wall of protective cap plug 3 is equipped with second constant head tank 14, second setting element 15 can imbed or break away from with driving second constant head tank 14.

The convex joint protective cap 13 is provided with a protective cap plug 3 suitable for an inserting joint slot, the protective cap plug 3 is inserted into the inserting joint slot to seal a sampling channel of the second quick joint 17, so that the sampling channel is prevented from being polluted, rusted, blocked and the like, meanwhile, the protective cap plug 3 also plays a role in filling and supporting the joint slot, so that the second quick joint 17 is prevented from generating concave deformation when being collided, so that the protective effect is achieved, the sampling steel cylinder is ensured to be stored for a long time, and the sampling steel cylinder can be normally used after being stored.

The utility model discloses do not limit to the mounting structure of second setting element 15, it is preferred, as in the embodiment shown in fig. 4, the internal perisporium that connects the slot is equipped with and is used for holding the second of second setting element 15 holds the chamber, just the second holds the chamber perpendicular with the direction of depth that connects the slot, second setting element 15 is suitable for the embedding the second location end of second constant head tank 14 is stretched out or is stretched into with driving the second holds the chamber. Of course, in other embodiments, the second receiving cavity may be disposed obliquely to the depth direction of the connector slot. Of course, in other embodiments, the second receiving cavity may not be provided on the inner peripheral wall of the joint socket, and the movable second positioning member 15 may be provided on the end portion of the joint socket.

The utility model discloses do not limit the structure that drives second setting element 15 and stretch into second constant head tank 14, it is preferred, as in the embodiment shown in fig. 4, the second holds the intracavity and is equipped with second elastic component 16, just second elastic component 16 is located second setting element 15 with the second holds between the chamber end in chamber, second elastic component 16 is used for the drive the second location end is stretched out the second holds the chamber.

Preferably, the second elastic member 16 is another spring, one end of the spring is connected to the second positioning member 15, the other end of the spring is connected to the bottom of the second accommodating chamber, in the depth direction of the second accommodating chamber, the circumferential profile of the spring and the circumferential profile of the second positioning member 15 are adapted to the circumferential profile of the second accommodating chamber, preferably, the second accommodating chamber includes a third chamber section and a fourth chamber section arranged along the depth direction, the circumferential width of the third chamber section is greater than the circumferential width of the fourth chamber section, the third chamber section is adapted to accommodate the second positioning member 15, the circumferential profile of the third chamber section is adapted to the circumferential profile of the second positioning member 15, the fourth chamber section is adapted to accommodate the spring, the circumferential profile of the spring is adapted to the circumferential profile of the fourth chamber section, and when the spring is in an uncompressed state, one end of the second positioning element 15, which faces the fourth cavity section, extends out of the fourth cavity section and is located in the third cavity section, and at this time, the second positioning end of the second positioning element 15 extends into the second accommodating cavity.

The utility model discloses do not limit to the structure that drive second setting element 15 stretches out second constant head tank 14, it is preferred, as in the embodiment shown in fig. 4, second location end is located connect the ascending slope of outer wall of slot depth direction to set up, so protective cap plug 3 to when connecting the slot and moving outward, the slope outer wall of second location end receives the pressure of the cell wall of second constant head tank 14 and driving second location end breaks away from second constant head tank 14, second location end can be round platform shape structure, also can be for four prismatic table structures.

Of course, in other embodiments, the above-mentioned pressing member structure or pushing and pulling member structure may be adopted to drive the second positioning member 15 to extend into or out of the second positioning slot 14.

The utility model discloses do not limit to the concrete structure of second constant head tank 14, it is preferred, as in the embodiment shown in fig. 3 and fig. 4, second constant head tank 14 is for encircleing the cyclic annular cell body of protective cap plug 3, and follow connect the depth direction of slot, second constant head tank 14's cross-sectional profile with the cross-sectional profile adaptation of second location end, second setting element 15 is followed it evenly sets up a plurality ofly to connect the circumference of slot. Of course, in other embodiments, the second positioning slot 14 may also be a slot body with a shape matching the second positioning end, and the second positioning slot 14 is provided with a number of second positioning pieces 15 corresponding to the number of second positioning pieces along the circumferential direction of the protective cap plug 3.

Furthermore, in order to form a better seal between the male connector protection cap 13 and the connector socket when they are connected, as shown in the embodiment of fig. 3 and 4, the end surface of the male connector protection cap 13 provided with the protection cap plug 3 is further provided with an external sealing gasket 10, and the external sealing gasket 10 is made of an elastic material and surrounds the protection cap plug 3. Of course, in other embodiments, the outer sealing gasket 10 may not be provided.

Further, in order to avoid the loss or inconvenience of carrying and storing of the female connector protection cap 1 and the male connector protection cap 13 when they are not used, as shown in the embodiment shown in fig. 1 to 4, the sampling steel cylinder further comprises two connecting devices, each of which comprises a connecting wire 11 and a collar 12, wherein the connecting wire 11 of one of the connecting devices is connected with the female connector protection cap 1, and the corresponding collar 12 is sleeved on the first quick connector 2; the connecting wire 11 of the other connecting device is connected with the male connector protective cap 13, and the corresponding lantern ring 12 is sleeved on the second quick connector 17. Of course, in other embodiments, the connecting means may not be provided.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The utility model provides a sampling steel bottle, its characterized in that, including set up first quick-operation joint (2) on the steel bottle body and be used for with concave joint protective cap (1) that first quick-operation joint (2) were pegged graft, first quick-operation joint (2) are equipped with joint plug (4), the periphery wall of joint plug (4) is equipped with first constant head tank (6), concave joint protective cap (1) is equipped with protective cap slot (5) with joint plug (4) adaptation, the internal perisporium of protective cap slot (5) is equipped with first constant head tank (7), first constant head tank (7) can be driven ground and imbed or break away from first constant head tank (6).

2. The sampling cylinder of claim 1,

the inner peripheral wall of the protective cap slot (5) is provided with a first accommodating cavity for accommodating the first positioning piece (7), the first accommodating cavity is perpendicular to the depth direction of the protective cap slot (5), and the first positioning piece (7) is suitable for being embedded into a first positioning end of the first positioning slot (6) and can be driven to extend out or extend into the first accommodating cavity; and/or

The concave joint protection cap is characterized in that an inner sealing gasket (9) made of elastic materials is arranged inside the concave joint protection cap (1), and the inner sealing gasket (9) forms the groove bottom of the protection cap slot (5).

3. The sampling cylinder of claim 2,

a first elastic piece (8) is arranged in the first accommodating cavity, and the first elastic piece (8) is positioned between the first positioning piece (7) and the cavity bottom of the first accommodating cavity and used for driving the first positioning end to extend out of the first accommodating cavity; and/or

The outer wall of the first positioning end, which is positioned in the depth direction of the protective cap slot (5), is obliquely arranged, so that when the connector plug (4) moves towards the outside of the protective cap slot (5), the oblique outer wall of the first positioning end is pressed by the slot wall of the first positioning slot (6) to drive the first positioning end to be separated from the first positioning slot (6).

4. The sampling cylinder as claimed in claim 3, characterized in that the first positioning groove (6) is an annular groove body surrounding the connector plug (4), and the cross-sectional profile of the first positioning groove (6) is adapted to the cross-sectional profile of the first positioning end along the depth direction of the protective cap socket (5), and the first positioning members (7) are uniformly arranged in plurality along the circumferential direction of the protective cap socket (5).

5. The sampling cylinder according to any one of claims 1 to 4, further comprising a second quick coupling (17) disposed on the cylinder body and a male coupling protection cap (13) for plugging with the second quick coupling (17), wherein the second quick coupling (17) is provided with a coupling socket, an inner peripheral wall of the coupling socket is provided with a second positioning member (15), the male coupling protection cap (13) is provided with a protection cap plug (3) adapted to the coupling socket, an outer peripheral wall of the protection cap plug (3) is provided with a second positioning groove (14), and the second positioning member (15) can be drivingly inserted into or disengaged from the second positioning groove (14).

6. The sampling steel cylinder as claimed in claim 5, wherein the inner peripheral wall of the joint slot is provided with a second accommodating cavity for accommodating the second positioning member (15), the second accommodating cavity is perpendicular to the depth direction of the joint slot, and the second positioning member (15) is suitable for being embedded into the second positioning end of the second positioning groove (14) and extending out or into the second accommodating cavity in a driven manner.

7. The sampling cylinder of claim 6,

a second elastic piece (16) is arranged in the second accommodating cavity, the second elastic piece (16) is positioned between the second positioning piece (15) and the cavity bottom of the second accommodating cavity, and the second elastic piece (16) is used for driving the second positioning end to extend out of the second accommodating cavity; and/or

The second positioning end is obliquely arranged on the outer wall of the connector slot in the depth direction, so that when the protective cap plug (3) moves towards the outside of the connector slot, the oblique outer wall of the second positioning end is pressed by the slot wall of the second positioning slot (14) to drive the second positioning end to be separated from the second positioning slot (14).

8. The sampling steel cylinder according to claim 7, wherein the second positioning groove (14) is an annular groove surrounding the protective cap plug (3), and a cross-sectional profile of the second positioning groove (14) is adapted to a cross-sectional profile of the second positioning end along a depth direction of the joint slot, and a plurality of second positioning members (15) are uniformly arranged along a circumferential direction of the joint slot.

9. The sampling cylinder according to claim 5, characterized in that the end face of the male connector protection cap (13) provided with the protection cap plug (3) is further provided with an outer sealing gasket (10), and in that the outer sealing gasket (10) is made of an elastic material and surrounds the protection cap plug (3).

10. The sampling cylinder according to claim 5, characterized in that it further comprises two connection means, each of which comprises a connection line (11) and a collar (12), wherein the connection line (11) of one of said connection means is connected to the female connector protection cap (1) and the corresponding collar (12) is fitted over the first quick connector (2); the connecting wire (11) of the other connecting device is connected with the convex connector protective cap (13), and the corresponding lantern ring (12) is sleeved on the second quick connector (17).