Sampling auxiliary device for electric insulating oil test

Abstract

The utility model discloses an auxiliary sampling device for an electric insulating oil test, and relates to the technical field of electric insulating oil sampling. The electric insulating oil test sampling auxiliary device comprises a sampling barrel with an opening in the upper end and a sealing cover assembly used for covering the opening in the upper end of the sampling barrel in a sealing mode, the outer wall of the sampling barrel is connected with a holding assembly which extends outwards and is adjustable in length, and the bottom of the sampling barrel is provided with an oil discharging hole communicated with an inner cavity of the sampling barrel. And the lower part of the sampling barrel is connected with an oil discharge assembly for opening and closing the oil discharge hole. According to the sampling device, by arranging the holding assembly, a sampling person can hold the holding assembly to hold the sampling barrel, then the sampling barrel is used for containing electric insulating oil to complete sampling, and compared with an existing sampling mode, the distance between the hand of the sampling person and the sampling barrel is increased; and the electric insulating oil is prevented from being adhered to the hands of sampling personnel in the sampling process.

Description

Technical Field

[0001] The present application relates to the technical field of power insulating oil sampling, and in particular to a power insulating oil test sampling auxiliary device. Background Art

[0002] Power insulating oil is a special lubricant, mainly used in transformers, circuit breakers, cables and other equipment in power systems, playing a key role in insulation, heat dissipation, arc extinguishing, etc. In order to ensure the safe operation of electrical equipment in power systems, it is necessary to sample power insulating oil for oil quality testing regularly or under specific circumstances to analyze the operating conditions of electrical equipment.

[0003] At present, the commonly used sampling method for power insulating oil is: the sampling personnel directly hold the open container in their hands and place the open container on the drain valve to receive the power insulating oil.

[0004] However, this sampling method has the following disadvantages: 1. During the sampling process, the electric insulating oil is likely to stick to the hands of the sampler, which makes subsequent cleaning very troublesome; 2. It is not convenient to carry after the sampling is completed, and when the electric insulating oil is subsequently tested for oil quality, the electric insulating oil is usually poured into the test container, which not only easily causes the electric insulating oil to spill, but also makes it difficult to control the amount of pouring. Utility Model Content

[0005] The purpose of the present application is to provide an auxiliary device for sampling electric insulating oil test, so as to solve the problem that the electric insulating oil is easy to stick to the hands of the sampling personnel during sampling.

[0006] The technical solution adopted by the present application to solve its technical problems is: an auxiliary device for sampling an electric insulating oil test, comprising a sampling barrel with an opening at the upper end and a sealing cover assembly for sealingly covering the upper opening of the sampling barrel, a gripping assembly extending outward and adjustable in length is connected to the outer wall of the sampling barrel, an oil drain hole communicating with its inner cavity is provided at the bottom of the sampling barrel, and an oil drain assembly for opening and closing the oil drain hole is connected below the sampling barrel.

[0007] Furthermore, the sealing cover assembly includes a flip cover for covering the upper end of the sampling barrel and hinged to the sampling barrel, and the flip cover is connected to a sealing plug for being inserted into the sampling barrel and sealingly cooperating with the inner wall of the sampling barrel.

[0008] Furthermore, the sealing plug comprises an elastic rubber plug.

[0009] Furthermore, the holding assembly includes a holding rod and a threaded rod, one end of the holding rod is provided with an internal threaded hole extending along its axial direction, the first end of the threaded rod is threadedly connected to the internal threaded hole, and the second end of the threaded rod is connected to the outer wall of the sampling tube.

[0010] Furthermore, a second mounting seat is connected to the outer wall of the sampling tube, and a rotating block is rotatably connected to the second mounting seat via a horizontally arranged second rotating shaft. The rotating block is connected to the second end of the threaded rod, and a locking member for locking the rotating block is also arranged on the second mounting seat.

[0011] Furthermore, the locking member includes a limit rod and a second spring, the limit rod is connected to the second mounting seat and can move along its own axis, the two ends of the second spring are respectively connected to the limit rod and the second mounting seat, and are used to drive one end of the limit rod to be inserted into the limit groove of the rotating block.

[0012] Furthermore, the oil drain assembly includes an oil drain seat and a sliding sealing plate, the oil drain seat is connected to the bottom of the sampling tube, the oil drain seat is provided with an oil drain channel connected to the oil drain hole, the sliding sealing plate is slidably connected to the oil drain seat, and the oil drain channel can be selectively opened or closed during the sliding process.

[0013] Furthermore, the bottom surface of the inner cavity of the sampling tube is a conical surface with a lower middle and higher periphery, and the oil drain hole is arranged at the lowest position of the conical surface.

[0014] Furthermore, a transparent window is provided on the outer wall of the sampling tube, and one side of the transparent window has scales arranged in the vertical direction.

[0015] Furthermore, a support leg is connected below the sampling tube to support it.

[0016] Beneficial effects of this application:

[0017] 1. The electric insulating oil test sampling auxiliary device provided in the embodiment of the present application, by providing a holding component connected to the sampling barrel, the sampling personnel can hold the holding component to hold the sampling barrel, and then use the sampling barrel to hold the electric insulating oil to complete the sampling. Compared with the existing sampling method, the distance between the sampling personnel's hands and the sampling barrel is increased, and the electric insulating oil is prevented from sticking to the sampling personnel's hands during the sampling process; by setting the length of the holding component to be adjustable, the length of the holding component can also be adjusted according to actual conditions during sampling, so as to achieve the purpose of adjusting the distance between the sampling personnel's hands and the sampling barrel.

[0018] 2. The power insulating oil test sampling auxiliary device provided in the embodiment of the present application is provided with a sealing cover assembly, which is used to seal the cover on the sampling tube after sampling, thereby preventing the sample from spilling out of the sampling tube during the transfer of the sampling tube containing the power insulating oil sample.

[0019] 3. The power insulating oil test sampling auxiliary device provided in the embodiment of the present application, by setting an oil drain hole at the bottom of the sampling cylinder, and connecting an oil drain assembly for opening and closing the oil drain hole under the sampling cylinder, the sample in the sampling cylinder can be discharged into the test container under the action of gravity by simply opening the oil drain assembly. Compared with the existing pouring method, it not only avoids sample spillage, but also makes it easy to control the sample discharge amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the power insulating oil test sampling auxiliary device provided in an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the structure of the sealing cover assembly;

[0023] Figure 3 is a schematic diagram of the structure of the grip assembly;

[0024] Figure 4 It is a schematic diagram of the structure of the oil drain assembly.

[0025] Reference numerals:

[0026] 1- Sampling tube;

[0027] 11-Oil drain hole;

[0028] 2- Sealing cover assembly;

[0029] 21- flip cover;

[0030] 22-sealing plug;

[0031] 23- first mounting seat;

[0032] 24- first rotating shaft;

[0033] 25-connecting plate;

[0034] 26-handle;

[0035] 27-stopper;

[0036] 3- Grip assembly;

[0037] 31- Grip;

[0038] 311-internal thread hole;

[0039] 32-threaded rod;

[0040] 33- second mounting seat;

[0041] 34- second rotating shaft;

[0042] 35-Rotation block;

[0043] 351-limiting slot;

[0044] 36-limiting rod;

[0045] 37- second spring;

[0046] 4-Oil drain assembly;

[0047] 41- oil drain seat;

[0048] 411-oil drain channel;

[0049] 42-sliding cover;

[0050] 421-through hole;

[0051] 43-tie rod;

[0052] 44-support block;

[0053] 45-return spring;

[0054] 5- Transparent window;

[0055] 6- scale;

[0056] 7- Legs. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0058] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0059] In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or is the orientation or positional relationship in which the product of the application is usually placed when in use, or is the orientation or positional relationship commonly understood by those skilled in the art. The terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, and an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements.

[0060] See also Figure 1 An auxiliary device for sampling an electric insulating oil test provided in an embodiment of the present application comprises a sampling barrel 1 with an opening at the upper end and a sealing cover assembly 2 for sealingly covering the upper opening of the sampling barrel 1, a grip assembly 3 extending outward and adjustable in length is connected to the outer wall of the sampling barrel 1, an oil drain hole 11 communicating with its inner cavity is provided at the bottom of the sampling barrel 1, and an oil drain assembly 4 for opening and closing the oil drain hole 11 is connected to the bottom of the sampling barrel 1.

[0061] The sampling barrel 1 is a structure with an open upper end and a closed lower end, and is used to contain the electric insulating oil sample when sampling. Exemplarily, the outer shape of the sampling barrel 1 is roughly cylindrical, including a cylinder surrounded by a circle of side walls and a bottom wall fixed to the bottom of the cylinder. The outer shape of the sampling barrel 1 can also be other shapes, which are not specifically limited here. The sealing cover assembly 2 is used to cover the upper opening of the sampling barrel 1 to seal the upper opening of the sampling barrel 1. The holding assembly 3 is connected to the outer wall of the sampling barrel 1 for holding by the sampling personnel. The oil drain hole 11 is arranged at the bottom of the sampling barrel 1 for discharging the sample in the sampling barrel 1. The oil drain assembly 4 is connected to the bottom of the sampling barrel 1 for opening and closing the oil drain hole 11.

[0062] The power insulating oil test sampling auxiliary device provided in the embodiment of the present application is provided with a holding component 3 connected to the sampling tube 1. The sampling personnel can hold the holding component 3 to hold the sampling tube 1, and then use the sampling tube 1 to hold the power insulating oil to complete the sampling. Compared with the existing sampling method, the distance between the sampling personnel's hand and the sampling tube 1 is increased, and the power insulating oil is prevented from sticking to the hands of the sampling personnel during the sampling process; by setting the length of the holding component 3 to be adjustable, the length of the holding component 3 can also be adjusted according to the actual situation during sampling to achieve the purpose of adjusting the sampling. The purpose is to control the distance between the personnel's hands and the sampling tube 1; when the sampling is completed, the sealing cover assembly 2 is sealed on the sampling tube 1, so that during the process of transferring the sampling tube 1 containing the power insulating oil sample, the sample can be prevented from spilling out of the sampling tube 1; when the sampling tube 1 is transferred to the predetermined position, the oil drain assembly 4 is opened, so that the power insulating oil sample in the sampling tube 1 can be discharged into the test container through the oil drain hole 11 and the oil drain assembly 4 under the action of gravity. Compared with the existing pouring method, it not only avoids the spilling of the sample, but also makes it easy to control the discharge amount of the sample.

[0063] The sealing cover assembly 2 can be sealed and connected with the sampling barrel 1 by a threaded structure. Exemplarily, the sealing cover assembly 2 and the sampling barrel 1 are separate structures, the sealing cover assembly 2 is provided with an internal thread section, and the outer wall of the upper end of the sampling barrel 1 is provided with an external thread section threadedly connected with the internal thread section. When the sealing cover assembly 2 is threadedly connected with the sampling barrel 1, the upper end opening of the sampling barrel 1 is sealed.

[0064] In some embodiments, see Figure 1 , Figure 2 The sealing cover assembly 2 includes a flip cover 21 which is used to cover the upper end of the sampling tube 1 and is hinged to the sampling tube 1 . The flip cover 21 is connected to a sealing plug 22 which is used to be inserted into the sampling tube 1 and sealably cooperate with the inner wall of the sampling tube 1 .

[0065] The flap 21 is a circular structure, and its diameter is larger than the outer diameter of the upper end of the sampling barrel 1. The flap 21 is hinged to the sampling barrel 1 so that the flap 21 can be turned up and down relative to the sampling barrel 1. Exemplarily, a first mounting seat 23 is fixed on the outer wall of the sampling barrel 1, and a connecting plate 25 is rotatably connected to the first mounting seat 23 through a horizontally arranged first rotating shaft 24, and the connecting plate 25 is connected to the flap 21, so that the flap 21 can be rotated around the first rotating shaft 24, and then the flap 21 is covered on the upper end of the sampling barrel 1. In other embodiments, the flap 21 can also be connected to the sampling barrel 1 through a hinge. The sealing plug 22 can be a disc-shaped structure or a circular ring structure, and is connected to the flap 21 by fasteners such as adhesive or bolts. When the flap 21 is turned over and covered on the upper end of the sampling barrel 1, the sealing plug 22 can be inserted into the sampling barrel 1 through the flap 21 and sealed with the inner wall of the sampling barrel 1, thereby achieving the sealing of the upper end opening of the sampling barrel 1.

[0066] The power insulating oil test sampling auxiliary device provided in the embodiment of the present application is provided with a flip cover 21 hinged to the sampling tube 1, and a sealing plug 22 is connected to the flip cover 21. The upper end opening of the sampling tube 1 can be opened or sealed by simply flipping the flip cover 21, and the operation is simple.

[0067] See also Figure 1 The first mounting seat 23 and the holding assembly 3 are arranged on the same side of the sampling tube 1, and the first mounting seat 23 is located above the holding assembly 3. In order to facilitate the lifting and pressing of the flip cover 21, in some embodiments, see Figure 1 , Figure 2 , a handle 26 is connected to the flip cover 21. The handle 26 and the sealing plug 22 are respectively located on both sides of the flip cover 21. When the flip sealing cover assembly 2 is flipped to open the upper end opening of the sampling tube 1, in order to control the maximum flip angle of the sealing cover assembly 2 and prevent the sealing cover assembly 2 from interfering with the grip assembly 3, in some embodiments, a stopper 27 for limiting the connection plate 25 is fixed on the outer wall of the sampling tube 1. During operation, refer to Figure 1 , Figure 2 When the flip cover 21 is flipped to the right to open the upper end opening of the sampling tube 1 , the connecting plate 25 is limitedly supported on the stopper 27 to limit the maximum flip angle of the flip cover 21 .

[0068] In some embodiments, the sealing plug 22 comprises an elastic rubber plug. When the sealing plug 22 is inserted into the sampling tube 1, it can be in close contact with the inner wall of the sampling tube 1 through its own elastic deformation, thereby improving the sealing effect between the two.

[0069] In some embodiments, see Figure 1 , Figure 3 The holding assembly 3 includes a holding rod 31 and a threaded rod 32. One end of the holding rod 31 is provided with an internal threaded hole 311 extending along its axial direction. The first end of the threaded rod 32 is threadedly connected in the internal threaded hole 311, and the second end of the threaded rod 32 is connected to the outer wall of the sampling barrel 1. Exemplarily, the threaded rod 32 is horizontally arranged and parallel to the radial direction of the sampling barrel 1. The second end of the threaded rod 32 can be directly fixedly connected to the outer wall of the sampling barrel 1. When in use, the holding rod 31 is rotated to adjust the position of the holding rod 31 on the threaded rod 32, thereby achieving the purpose of adjusting the length of the holding assembly 3.

[0070] In some embodiments, see Figure 1 , Figure 3The outer wall of the sampling tube 1 is connected with a second mounting seat 33, and a rotating block 35 is rotatably connected to the second mounting seat 33 through a horizontally arranged second rotating shaft 34. The rotating block 35 is connected to the second end of the threaded rod 32, and a locking member for locking the rotating block 35 is also arranged on the second mounting seat 33. The second rotating shaft 34 is arranged parallel to and below the first rotating shaft 24. The locking member includes two states, namely a locked state and an unlocked state; when the locking member is in the locked state, the rotating block 35 cannot rotate around the second rotating shaft 34, and the threaded rod 32 is perpendicular to the axial direction of the sampling tube 1; when the locking member is in the unlocked state, the rotating block 35 can rotate around the second rotating shaft 34.

[0071] When sampling through the device, the threaded rod 32 can be controlled to drive the rotating block 35 to rotate around the second rotating shaft 34 to rotate the threaded rod 32 to a horizontal state, and then the rotating block 35 can be locked by the locking member, and then the sampling personnel can hold the gripping rod 31 to hold the sampling tube 1, and then use the sampling tube 1 to hold the power insulating oil to complete the sampling. After the sampling of the entire device is completed, the locking member is first released from the locking member to drive the rotating block 35 to rotate around the second rotating shaft 34 to rotate the threaded rod 32 to a vertical state, thereby reducing the overall size of the entire device and reducing the space occupied by the entire device when stored.

[0072] In some embodiments, see Figure 3 The locking member includes a limiting rod 36 and a second spring 37. The limiting rod 36 is connected to the second mounting seat 33 and can move along its own axis. The two ends of the second spring 37 are respectively connected to the limiting rod 36 and the second mounting seat 33, and are used to drive one end of the limiting rod 36 to be inserted into the limiting groove 351 of the rotating block 35.

[0073] When in use, when the limiting rod 36 is pulled to separate one end of the limiting rod 36 from the limiting groove 351, the lock on the rotating block 35 is released, and the rotating block 35 can rotate around the second rotating shaft 34. When the limiting rod 36 is released, the limiting rod 36 is reset under the action of the second spring 37, so that one end of the limiting rod 36 is inserted into the limiting groove 351 of the rotating block 35, and the rotating block 35 is locked, and the rotating block 35 cannot rotate around the second rotating shaft 34. Exemplarily, when the limiting rod 36 is not coaxial with the second rotating shaft 34, the cross-sectional shapes of the limiting rod 36 and the limiting groove 351 can be any shape such as a circle, a rectangle, etc. When the limiting rod 36 is coaxially arranged with the second rotating shaft 34, the cross-sectional shapes of the limiting rod 36 and the limiting groove 351 are non-rotating shapes, such as a rectangle, a square, etc.

[0074] The oil drain assembly 4 may include a valve, through which the oil drain hole 11 is opened and closed. Exemplarily, the valve may be a ball valve.

[0075] In some embodiments, see Figure 4 The oil drain assembly 4 includes an oil drain seat 41 and a sliding sealing plate 42. The oil drain seat 41 is connected to the bottom of the sampling tube 1. The oil drain seat 41 is provided with an oil drain passage 411 connected to the oil drain hole 11. The sliding sealing plate 42 is slidably connected to the oil drain seat 41 and can selectively open or close the oil drain passage 411 during the sliding process. Exemplarily, the sliding sealing plate 42 is provided with a through hole 421 for matching with the oil drain passage 411.

[0076] When in use, the sliding sealing plate 42 is controlled to slide. When the through hole 421 is aligned with the oil drainage channel 411, the oil drainage channel 411 is in an open state. At this time, the sample in the sampling tube 1 can be discharged through the oil drainage hole 11 and the oil drainage channel 411 under the action of gravity; the sliding sealing plate 42 is controlled to slide in the opposite direction. When the through hole 421 is completely separated from the oil drainage channel 411, the oil drainage channel 411 is closed through the sliding sealing plate 42. At this time, the sample in the sampling tube 1 cannot be discharged.

[0077] In some embodiments, see Figure 4 A support block 44 is installed at the bottom of the sampling tube 1, and a pull rod 43 is slidably fitted on the support block 44, wherein the sliding direction of the pull rod 43 is parallel to the sliding direction of the sliding sealing plate 42, one end of the pull rod 43 is connected to the sliding sealing plate 42, and a reset spring 45 is also connected between the pull rod 43 and the support block 44, and the reset spring 45 is used to drive the sliding sealing plate 42 to reset and make the oil discharge channel 411 in a closed state.

[0078] When discharging the sample in the sampling tube 1, in order to discharge the sample in the sampling tube 1 completely, in some embodiments, see Figure 4 The bottom surface of the inner cavity of the sampling tube 1 is a conical surface with a low middle and high circumference, and the oil discharge hole 11 is arranged at the lowest position of the conical surface.

[0079] In some embodiments, see Figure 1 A transparent window 5 is provided on the outer wall of the sampling tube 1, and a scale 6 is arranged along the vertical direction on one side of the transparent window 5. The transparent window 5 is provided to facilitate observation of the sample in the sampling tube 1, and the scale 6 is provided to facilitate knowing the sample amount in the sampling tube 1.

[0080] In some embodiments, see Figure 1 The lower part of the sampling barrel 1 is connected with a supporting leg 7 for supporting it. Exemplarily, four supporting legs 7 are connected to the lower part of the sampling barrel 1. The supporting legs 7 are provided to support the sampling barrel 1.

[0081] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Based on the technical essence of the present application and within the spirit and principles of the present application, any simple modification, equivalent replacement and improvement of the above embodiments shall still fall within the protection scope of the technical solution of the present application.

Claims

1. A power insulating oil test sampling auxiliary device, characterized in that: The invention comprises a sampling cylinder (1) with an opening at the upper end and a sealing cover assembly (2) for sealingly covering the upper opening of the sampling cylinder (1); a grip assembly (3) extending outward and having an adjustable length is connected to the outer wall of the sampling cylinder (1); an oil drain hole (11) communicating with an inner cavity of the sampling cylinder (1) is provided at the bottom of the sampling cylinder (1); and an oil drain assembly (4) for opening and closing the oil drain hole (11) is connected below the sampling cylinder (1).

2. The power insulating oil test sampling auxiliary device according to claim 1 is characterized in that: The sealing cover assembly (2) comprises a flip cover (21) for covering the upper end of the sampling barrel (1) and being hinged to the sampling barrel (1); the flip cover (21) is connected to a sealing plug (22) for being inserted into the sampling barrel (1) and sealingly cooperating with the inner wall of the sampling barrel (1).

3. The power insulating oil test sampling auxiliary device according to claim 2 is characterized in that: The sealing plug (22) comprises an elastic rubber plug.

4. The power insulating oil test sampling auxiliary device according to claim 1 is characterized in that: The holding assembly (3) comprises a holding rod (31) and a threaded rod (32); one end of the holding rod (31) is provided with an internal threaded hole (311) extending along its axial direction; a first end of the threaded rod (32) is threadedly connected to the internal threaded hole (311); and a second end of the threaded rod (32) is connected to the outer wall of the sampling tube (1).

5. The power insulating oil test sampling auxiliary device according to claim 4 is characterized in that: A second mounting seat (33) is connected to the outer wall of the sampling tube (1); a rotating block (35) is rotatably connected to the second mounting seat (33) via a horizontally arranged second rotating shaft (34); the rotating block (35) is connected to the second end of the threaded rod (32); and a locking member for locking the rotating block (35) is also arranged on the second mounting seat (33).

6. The power insulating oil test sampling auxiliary device according to claim 5 is characterized in that: The locking member comprises a limiting rod (36) and a second spring (37); the limiting rod (36) is connected to the second mounting seat (33) and is movable along its own axis; two ends of the second spring (37) are respectively connected to the limiting rod (36) and the second mounting seat (33) and are used to drive one end of the limiting rod (36) to be inserted into the limiting groove (351) of the rotating block (35).

7. The power insulating oil test sampling auxiliary device according to claim 1 is characterized in that: The oil drain assembly (4) comprises an oil drain seat (41) and a sliding sealing plate (42); the oil drain seat (41) is connected to the bottom of the sampling tube (1); an oil drain channel (411) communicating with the oil drain hole (11) is provided on the oil drain seat (41); the sliding sealing plate (42) is slidably connected to the oil drain seat (41) and can selectively open or close the oil drain channel (411) during the sliding process.

8. The power insulating oil test sampling auxiliary device according to claim 1 is characterized in that: The bottom surface of the inner cavity of the sampling tube (1) is a conical surface with a lower middle and higher periphery, and the oil drain hole (11) is arranged at the lowest position of the conical surface.

9. The power insulating oil test sampling auxiliary device according to claim 1, characterized in that: A transparent window (5) is provided on the outer wall of the sampling tube (1), and one side of the transparent window (5) has scales (6) arranged in a vertical direction.

10. The power insulating oil test sampling auxiliary device according to claim 1, characterized in that: A support leg (7) for supporting the sampling cylinder (1) is connected below the sampling cylinder (1).

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