CN218444654U - Oil product detection sampling device - Google Patents

Abstract

The utility model relates to the technical field of sampling equipment, and discloses an oil product detection sampling device, which drives a piston to move through an electric telescopic rod so that the piston contacts a position switch or is separated from the position switch, realizes starting and stopping control of the electric telescopic rod and accurately controls oil sampling quantity; because the sampling tube is transparent structure and the sampling tube outer wall is provided with the scale mark, through the sample volume between the scale that electric telescopic handle drive piston removal adjusting piston current position corresponds and the scale that position switch corresponds, can realize adjusting the fluid sample volume according to actual demand. The whole oil product detection sampling device is simple in structure and small in size, and after sampling is finished, the whole oil product detection sampling device is directly moved to realize transfer of sample oil; the sample oil in the sample cavity is only exposed near the sampling port, but the negative pressure in the whole sample cavity can reduce the volatilization amount of the sample solution in the sample cavity in the pipetting process, and the accurate control of the oil sampling amount is further realized.

Description

Oil product detection sampling device

Technical Field

The utility model relates to a sampling equipment technical field especially relates to an oil quality control surveys sampling device.

Background

The gasoline is a volatile and combustible hydrocarbon mixture liquid which is obtained by fractionating and cracking petroleum, the gasoline is a transparent and combustible liquid which has the distillation range of 30-220 ℃ and can be used as fuel, and the main components of the gasoline are C5-C12 aliphatic hydrocarbon and naphthenic hydrocarbon and a certain amount of aromatic hydrocarbon.

In the gasoline production process and the laboratory oil quality testing, in order to detect whether the gasoline produced in the same batch reaches the standard, a sampling device is generally adopted to carry out sampling testing before and after the test so as to determine the state of the oil product and the content of impurities.

Petroleum sampling is the basis for accurately obtaining analytical data of petroleum products, and related oil product detection in the automobile industry comprises gasoline, diesel oil, lubricating oil and the like. Volatile matter-containing oils such as gasoline should be taken directly to the laboratory after sampling, and because gasoline often contains deposits and residue samples. In order to improve the accuracy of the detection result, the sampling link needs to accurately avoid the sediment and the residue sample, and the movement of the oil container is reduced as much as possible.

Common oil sampling includes manual sampling and automatic sampling, the manual sampling operation should be performed according to relevant regulations in GB/T4756-2015 Manual Petroleum liquid sampling method standard, and the standard is mainly used for various large containers such as oil tanks, oil tank trucks and the like. The automatic sampling method is in accordance with relevant regulations of SY/T5317-2006 automatic sampling method for petroleum liquid pipeline, is suitable for continuous automatic sampling of oil products in pipeline transportation, and overcomes the defects of manual sampling.

The manual sampling and automatic sampling are more suitable for large oil containers, although the national specified standards exist, in the actual sampling process of a laboratory, because the amount of samples required in the experiment is small, when the large oil container is used for laboratory oil sampling, because the volatility of gasoline is high, oil volatilization can be caused when a liquid transferring cavity is adopted for transferring liquid; and the adnexed part fluid sample of oil container inner wall can't shift, moves liquid self and also can lose the fluid sample to lead to the sample oil mass inaccurate, the subsequent product data analysis of direct influence. In addition, the use of a pipetting chamber for oil sampling increases the complexity of the entire sampling process.

In addition, different experimental required fluid samples are different, adopt traditional large-scale oil container cooperation pipetting gun to take a sample, can't carry out the fine setting of sample oil volume.

Therefore, in order to control the amount of oil to be sampled, an oil quality testing and sampling device is needed to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil quality control surveys sampling device not only can control and adjust the fluid sample volume according to the experiment demand accurately, can also improve the convenience that the fluid sample shifted.

To achieve the purpose, the utility model adopts the following technical proposal:

oil quality control surveys sampling device includes:

the sampling tube is of a transparent structure, and the outer wall of the sampling tube is provided with scale marks;

the piston is movably arranged in the sampling cylinder along the length direction of the scale mark, and the piston divides the inner cavity of the sampling cylinder into a sample cavity and an installation cavity;

the sampling head is provided with a sampling channel, one end of the sampling channel forms a sampling port, and the sampling head is connected with the sampling cylinder so that the other end of the sampling channel is communicated with the sample cavity;

the electric telescopic rod is positioned in the mounting cavity, the fixed end of the electric telescopic rod is mounted on the sampling cylinder, the output end of the electric telescopic rod is connected with the piston and used for driving the piston to move between a first preset position and a second preset position, and the second preset position is closer to the sampling head than the first preset position;

the position switch is positioned in the mounting cavity, the piston can be in contact with the position switch to enable the position switch to be switched to an enabled state or be separated from the position switch to enable the position switch to be switched to a forbidden state, the position switch is electrically connected with the electric telescopic rod, and when the position switch is in the forbidden state, the electric telescopic rod can stop working; when the position switch is in the enabling state, the electric telescopic rod can work.

As an above-mentioned oil quality control surveys sampling device's a preferred technical scheme, still include the position control structure, the position control structure includes:

the adjusting plate is positioned in the mounting cavity, the adjusting plate is movably mounted on the sampling cylinder along the moving direction of the piston, and the position switch is mounted on the adjusting plate;

and the adjusting driving unit is connected with the adjusting plate and used for driving the adjusting plate to move along the moving direction of the piston.

As an optimized technical scheme of above-mentioned oil quality control sampling device, the regulating plate is restricted for the sampling tube circumferential direction rotates, the regulation drive unit includes:

the threaded rod, the one end of threaded rod exposes and forms the operating portion, and the other end passes stretch into behind the first lateral wall of sampling tube the installation cavity internal rotation connect in the regulating plate, the threaded rod with first lateral wall threaded connection.

As an optimal technical scheme of the oil product detection sampling device, one of the inner wall of the sampling cylinder and the adjusting plate is provided with a sliding groove, the other one of the inner wall of the sampling cylinder and the adjusting plate is provided with a sliding block, and the sliding block is arranged in the sliding groove in a sliding manner along the moving direction of the piston.

As a preferred technical solution of the oil product detecting and sampling device, a side wall of the chute at an end far away from the sampling head forms a first limit surface, and the adjusting plate has a first limit position capable of abutting against the first limit surface along a moving direction of the piston; the side wall of the sliding chute close to one end of the sampling head forms a second limiting surface;

when the adjusting plate is located at the first limit position, the piston is located between the second limit surface and the sampling head.

As an optimal technical scheme of the oil product detection and sampling device, the output end of the electric telescopic rod is positioned in the mounting cavity, and the adjusting plate is movably sleeved outside the output end of the electric telescopic rod along the moving direction of the piston.

As an above-mentioned oil quality control surveys sampling device's a preferred technical scheme, still include:

the handheld handle is located the sampling tube is back to the one end of sampling head, handheld handle with the sampling tube links to each other.

As an optimal technical scheme of the oil product detection and sampling device, the outer wall of the handheld handle is provided with an anti-skid protrusion.

As an optimal technical scheme of the oil product detection and sampling device, a power supply battery is detachably mounted in the handheld handle, and the power supply battery is electrically connected with the electric telescopic rod and used for supplying power to the electric telescopic rod.

As a preferred technical scheme of the oil product detection and sampling device, a battery jar with an opening at one end is arranged on the handheld handle, and the power supply battery is arranged in the battery jar;

the handle is detachably connected with a blocking cover for blocking the opening.

The utility model discloses beneficial effect: the utility model provides an oil quality control surveys sampling device, through the electric telescopic handle drive piston removal make the piston contact position switch or break away from with position switch, realize electric telescopic handle start-stop control then to realize the accurate control of fluid sample volume; and can drive the piston through electric telescopic handle and remove the sample volume between the scale that the adjusting piston current position corresponds and the scale that position switch corresponds, realize adjusting the fluid sample volume according to actual demand to satisfy experimental demand.

Because electric telescopic handle's removal precision is higher, adopt electric telescopic handle drive piston to remove, can further improve the accuracy of fluid sample volume control, carry out data analysis according to experimental detection data, improved the accuracy of data analysis result.

Whole oil quality control surveys sampling device's simple structure, it is small, can finish the back at the sample, the whole oil quality control surveys sampling device of direct movement, realizes the transfer of the sample fluid of sample intracavity. After the sampling is finished, the whole oil detection sampling device only exposes the sample oil near the sampling port, but because the inside of the whole sample cavity is of negative pressure, the volatilization amount of the sample solution in the sample cavity in the pipetting process can be greatly reduced, and the accurate control of the oil sampling amount is further realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an oil product detecting and sampling device provided in an embodiment of the present invention;

FIG. 2 is a sectional view of an oil quality detecting and sampling device provided by an embodiment of the present invention;

fig. 3 is a partially enlarged schematic view at a in fig. 2.

In the figure:

1. a sampling tube; 11. a sample chamber; 12. a mounting cavity; 13. scale lines; 14. a chute; 141. a first limiting surface; 142. a second limiting surface;

2. a piston; 21. pressing the contact;

3. a sampling head; 31. a sampling channel; 311. a sampling port;

4. an electric telescopic rod;

5. a position switch; 51. a movable contact;

6. a position adjustment structure; 61. an adjusting plate; 611. a slider; 62. a threaded rod; 621. an operation section;

7. a handle; 71. a battery case; 72. a blocking cover; 73. anti-skid projections;

8. a power supply battery;

9. a connecting rod;

10. and a seal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

As shown in fig. 1 to fig. 3, the present embodiment provides an oil product detecting and sampling device for sampling oil and transferring the sampled oil. The oil may be gasoline, diesel oil or lubricating oil, and the example of the present embodiment takes the oil to be sampled as gasoline.

The oil product detection sampling device provided by the embodiment comprises a sampling cylinder 1, a piston 2, a sampling head 3, an electric telescopic rod 4, a position switch 5 and a position adjusting structure 6, wherein the sampling cylinder 1 is of a transparent structure, and the outer wall of the sampling cylinder 1 is provided with scale marks 13; the piston 2 is movably arranged in the sampling cylinder 1 along the length direction of a scale mark 13, and the piston 2 divides the inner cavity of the sampling cylinder 1 into a sample cavity 11 and an installation cavity 12; the sampling head 3 is provided with a sampling channel 31, one end of the sampling channel 31 forms a sampling port 311, the sampling head 3 is connected with the sampling cylinder 1, and the other end of the sampling channel 31 is communicated with the sample cavity 11; the electric telescopic rod 4 is positioned in the mounting cavity 12, the fixed end of the electric telescopic rod 4 is mounted on the sampling cylinder 1, the output end of the electric telescopic rod 4 is connected with the piston 2 and used for driving the piston 2 to move between a first preset position and a second preset position, and the second preset position is closer to the sampling head 3 than the first preset position; the position switch 5 is positioned in the mounting cavity 12, the piston 2 can be in contact with the position switch 5 to enable the position switch 5 to be switched to an enabled state, or can be separated from the position switch 5 to enable the position switch 5 to be switched to a disabled state, the position switch 5 is electrically connected with the electric telescopic rod 4, and when the position switch 5 is in the disabled state, the electric telescopic rod 4 can stop working; when the position switch 5 is in the enabling state, the electric telescopic rod 4 can work. It should be noted that the first preset position and the second preset position are two extreme positions of the reciprocating movement of the piston 2.

Before oil sampling is carried out, determining an oil sampling quantity Q1 of required oil according to actual requirements, determining an initial position of a piston 2 according to a scale mark 13 on the outer wall of a sampling cylinder 1, determining whether the sampling quantity Q2 between the initial position and a scale corresponding to a position switch 5 can meet the requirements, and if the sampling quantity Q2 does not meet the requirements and is less than Q1, controlling an electric telescopic rod 4 to drive the piston 2 to move towards the side of a second preset position until the sampling quantity between the scale corresponding to the current position of the piston 2 and the scale corresponding to the position switch 5 is equal to Q1; if Q2 is larger than Q1, the electric telescopic rod 4 is controlled to drive the piston 2 to move towards the side of the first preset position until the sampling amount between the scale corresponding to the current position of the piston 2 and the scale corresponding to the position switch 5 is equal to Q1. Then the sampling head 3 is inserted into the oil liquid to control the electric telescopic rod 4 to work, the electric telescopic rod 4 drives the piston 2 to move, negative pressure is formed in the sample cavity 11, and the oil liquid enters the sampling channel 31 through the sampling port 311 and enters the sample cavity 11 through the sampling channel 31; when the piston 2 contacts the position switch 5, the position switch 5 is switched to the forbidden state, and the electric telescopic rod 4 stops working.

According to the oil product detection sampling device provided by the embodiment, the electric telescopic rod 4 drives the piston 2 to move, so that the piston 2 is in contact with the position switch 5 or is separated from the position switch 5, starting and stopping control of the electric telescopic rod 4 is realized, and accurate control of oil sampling amount is realized; and can adjust the sample volume between the scale that 2 current position of piston corresponds and the scale that position switch 5 corresponds through the sample volume that electric telescopic handle 4 drive piston 2 removed, realize adjusting fluid sample volume according to actual demand to satisfy experimental demand.

Because the moving precision of the electric telescopic rod 4 is high, the electric telescopic rod 4 is adopted to drive the piston 2 to move, the accuracy of oil sampling volume control can be further improved, data analysis is favorably carried out according to experimental detection data, and the accuracy of a data analysis result is improved.

Whole oil quality control surveys sampling device's simple structure, it is small, can finish the back at the sample, the whole oil quality control surveys sampling device of direct movement, realizes the transfer of the sample fluid in sample chamber 11. After the sampling is finished, the whole oil detection sampling device only has the sample oil near the sampling port 311 exposed, but because the inside of the whole sample cavity 11 is negative pressure, the volatilization volume of the sample solution in the sample cavity 11 in the pipetting process can be greatly reduced, and the accurate control of the oil sampling volume is further realized.

In order to reduce the volatilization of the sample solution in the sample chamber 11 during pipetting, the sampling port 311 is tapered. Illustratively, the sampling port 311 is a tapered opening.

Further, the oil product detection sampling device further comprises a position adjusting structure 6, and the position adjusting structure 6 can selectively lock the position switch 5 and the sampling cylinder 1 so as to fixedly install the position switch 5 on the sampling cylinder 1, or unlock the position switch 5 and the sampling cylinder 1 and drive the position switch 5 to move along the moving direction of the piston 2. Therefore, the position of the position switch 5 in the moving direction of the piston 2 can be adjusted, and the maximum sampling quantity of the oil product detection sampling device can be increased; and after finishing the position adjustment of position switch 5, lock position switch 5 and sampler barrel 1, can ensure the position stability and the accuracy of position switch 5, can contact position switch 5 after piston 2 moves to corresponding position to close position switch 5.

When the piston 2 moves to the second preset position, if the sampling amount between the scale corresponding to the second preset position and the scale corresponding to the position switch 5 is still smaller than Q1, the target scale required by the position switch 5 when the piston 2 is at the second preset position can be determined according to the oil sampling amount, the position switch 5 and the sampling cylinder 1 are unlocked through the position adjusting structure 6, and the position switch 5 is driven to move in the direction far away from the second preset position, so that the position of the position switch 5 in the moving direction of the piston 2 is adjusted; when the position switch 5 reaches the target scale, the position switch 5 and the sampling tube 1 are locked by the position adjusting structure 6 so as to fix the position switch 5 on the sampling tube 1.

When the piston 2 moves to the first preset position, if the sampling amount between the scale corresponding to the first preset position and the scale corresponding to the position switch 5 is still larger than Q1, the target scale required by the position switch 5 when the piston 2 is at the second preset position can be determined according to the oil sampling amount, the position switch 5 and the sampling cylinder 1 are unlocked through the position adjusting structure 6, the position switch 5 is driven to move in the direction close to the second preset position, and the position of the position switch 5 in the moving direction of the piston 2 is adjusted; when the position switch 5 reaches the target scale, the position switch 5 and the sampling tube 1 are locked by the position adjusting structure 6 to fix the position switch 5 on the sampling tube 1.

Alternatively, the position adjusting structure 6 includes an adjusting plate 61 and an adjusting driving unit, wherein the adjusting plate 61 is located in the mounting cavity 12, the adjusting plate 61 is movably mounted to the sampling tube 1 along the moving direction of the piston 2, and the position switch 5 is mounted to the adjusting plate 61; the adjustment driving unit is connected to the adjustment plate 61 for driving the adjustment plate 61 to move in the moving direction of the piston 2. The position of the position switch 5 can be adjusted by driving the adjusting plate 61 to move through the adjusting driving unit, and the convenience of adjusting the position of the position switch 5 is improved.

Optionally, the adjusting plate 61 is restricted from rotating circumferentially relative to the sampling tube 1, the adjusting drive unit includes a threaded rod 62, one end of the threaded rod 62 is exposed to form the operating portion 621, the other end of the threaded rod 62 penetrates through the first side wall of the sampling tube 1 and then extends into the mounting cavity 12 to be rotatably connected to the adjusting plate 61, and the threaded rod 62 is in threaded connection with the first side wall. The manual rotation of the operating portion 621 rotates the threaded rod 62, and since the adjusting plate 61 is restricted from rotating relative to the sampling cylinder 1, the threaded rod 62 will drive the adjusting plate 61 to move in the moving direction of the plunger 2. Alternatively, the operating portion 621 and the threaded rod 62 form a T-shaped structure for easy operation by the user. Illustratively, the operating part 621 is a disk structure, the operating part 621 and the threaded rod 62 are coaxial, and the outer diameter of the operating part 621 is larger than that of the threaded rod 62.

In order to facilitate the rotation of the threaded rod 62 relative to the adjusting plate 61, the threaded rod 62 and the adjusting plate 61 are rotatably connected through a bearing, so that the smoothness of the rotation of the threaded rod 62 is improved.

Further, in order to make the adjusting plate 61 restricted to rotate circumferentially with respect to the sampling cylinder 1, one of the inner wall of the sampling cylinder 1 and the adjusting plate 61 is provided with a slide groove 14, and the other is provided with a slide block 611, and the slide block 611 is slidably provided in the slide groove 14 in the moving direction of the piston 2. Illustratively, the sliding groove 14 is disposed on the inner wall of the sampling tube 1, and the sliding block 611 is protruded on the adjusting plate 61. The sliding block 611 and the sliding groove 14 are in sliding fit along the moving direction of the piston 2, so that the movement of the adjusting plate 61 is guided, the stability of the adjusting plate 61 in the moving process is improved, the adjusting plate 61 is limited to rotate circumferentially relative to the sampling cylinder 1, and the adjusting plate 61 can move along the moving direction of the piston 2 when the threaded rod 62 rotates.

Furthermore, a first limit surface 141 is formed on the side wall of the chute 14 at one end far away from the sampling head 3, and the adjusting plate 61 has a first limit position which can be abutted against the first limit surface 141 along the moving direction of the piston 2; the side wall of the chute 14 near one end of the sampling head 3 forms a second limiting surface 142; when the adjusting plate 61 is located at the first limit position, the piston 2 is located between the second limit surface 142 and the sampling head 3. So design, not only can realize two extreme position when adjusting the regulating plate 61 position through first spacing face 141 and the spacing face 142 restriction of second, in order to prevent that regulating plate 62 from leading to the fact the interference to other parts, simultaneously can also ensure that piston 2 is located the one end that runner 14 is close to sampling head 3 all the time, piston 2 can not meet with runner 14, thereby prevent that the fluid sample in the sample chamber 11 from passing through in runner 14 gets into installation cavity 12, further realize the accurate control to fluid sample volume, be favorable to carrying out data analysis according to the experiment detection data, the accuracy of data analysis result has been improved.

In order to facilitate the movement of the plunger 2 and reduce the movement resistance of the plunger 2, in the present embodiment, the outer peripheral wall of the plunger 2 is slidably fitted to the inner peripheral wall of the sampling tube 1. In order to improve the sealing effect between the piston 2 and the inner wall of the sampling cylinder 1, a sealing element 10 is arranged between the outer peripheral wall of the piston 2 and the inner peripheral wall of the sampling cylinder 1, and the oil liquid sample in the sample cavity 11 can be prevented from entering the installation cavity 12 through a gap between the outer peripheral wall of the piston 2 and the inner peripheral wall of the sampling cylinder 1 in the moving process of the piston 2 by arranging the sealing element 10.

Further, the output end of the electric telescopic rod 4 is located in the installation cavity 12, and the adjusting plate 61 is movably sleeved outside the output end of the electric telescopic rod 4 along the moving direction of the piston 2. So design, not only can avoid electric telescopic handle 4 to cause the interference to the removal of adjusting plate 61, can also avoid adjusting plate 61 to cause the interference to the removal of electric telescopic handle 4's expansion end. Specifically, be provided with the wearing hole on the regulating plate 61, electric telescopic handle 4's one end is located the regulating plate 61 one side of back to piston 2, and electric telescopic handle 4's output passes and connects in piston 2 behind the wearing hole, has the interval between the output of wearing hole and electric telescopic handle 4, in other words, the aperture of wearing hole is greater than the external diameter of electric telescopic handle 4's output. Illustratively, the entire electric telescopic rod 4 is located entirely within the mounting cavity 12.

Further, oil quality control surveys sampling device still includes handheld handle 7, and handheld handle 7 is located the one end that sampling barrel 1 back of the body turned on the sample head 3, and handheld handle 7 links to each other with sampling barrel 1. So design, the oil quality testing device is convenient for the handheld of operator.

Optionally, the outer wall of the handheld handle 7 is provided with an anti-slip bulge 73, so that the friction force between the handheld handle 7 and the palm of the user is increased, and the probability of accidental slippage of the oil product detection sampling device is reduced. Illustratively, the antiskid projections 73 are provided in plurality, and the antiskid projections 73 are made of silica gel. Optionally, according to ergonomic design, the handle 7 is an i-shaped structure, which is convenient for a user to hold and improves the comfort of taking. The anti-slip projection 73 is arranged on the outer wall of the vertical rod of the I-shaped structure.

Further, install power supply battery 8 in the handheld handle 7, power supply battery 8 is connected with electric telescopic handle 4 electricity for supply power for electric telescopic handle 4.

Further, a battery groove 71 with an opening end is arranged on the handle 7, and the power supply battery 8 is detachably arranged in the battery groove 71; a closing cap 72 is detachably connected to the handle 7 for closing off the opening. So designed, the easy to detach blanking cover 72 takes out the power supply battery 8, and the installation blanking cover 72 blocks the opening to prevent the power supply battery 8 from escaping from the battery container 71.

In this embodiment, the power supply battery 8, the electric telescopic rod 4 and the position switch 5 are connected in series to form a series circuit, and the position switch 5 is required to be a normally closed switch in order to realize that the electric telescopic rod 4 can work when the power supply battery 8 is installed. Other control switches do not need to be arranged independently, and when the device is not used, the power supply battery 8 only needs to be taken out; the power supply battery 8 is installed when in use.

Specifically, the enabled state of the position switch 5 is the closed state of the position switch 5; the inhibition state of the position switch 5 is the off state of the position switch 5. When the piston 2 contacts the position switch 5, the position switch 5 can be switched to an off state.

Alternatively, the side of the piston 2 facing the position switch 5 is provided with a press contact 21, the position switch 5 has a movable contact 51 and a fixed contact opposite to the movable contact 51, the movable contact 51 is normally contacted with the fixed contact, and the position switch 5 is in a closed state. When the piston 2 contacts the position switch 5, the pressing contact 21 pushes the movable contact 51 to operate, and the movable contact 51 and the stationary contact are separated, so that the position switch 5 is turned off, and the electric telescopic rod 4 stops operating. In the process of separating the piston 2 from the movable contact 51 of the position switch 5, the movable contact 51 is gradually reset until the piston 2 is separated from the movable contact 51 of the position switch 5, and the movable contact 51 is contacted with the fixed contact, so that the position switch 5 is switched to a closed state.

In order to control the electric telescopic rod 4 to work and enable the oil sample in the sample cavity 11 to flow out, artificial control can be reduced, a contact switch is arranged inside the sample cavity 11 and can be arranged on the inner wall of the sample cavity 11, and the contact switch can change states under the action of a piston 2 only after the piston 2 can completely discharge the oil sample in the sample cavity 11, so that the electric telescopic rod 4 stops working. It is also possible to arrange a contact switch in the piston 2. In other embodiments, an external control switch may be directly connected to the series circuit, and the external control switch may be manually operated to control the start and stop of the electric telescopic rod 4.

Optionally, the blocking cover 72 is a rubber structural member, so that the blocking cover 72 is in flexible contact with the power supply battery 8, and the blocking cover 72 is prevented from damaging the power supply battery 8; the opening of the battery jar 71 can be sealed by the sealing cover 72, and the waterproof capability of the power supply battery 8 is improved. The power supply battery 8 is illustratively a lithium battery. In other embodiments, the power supply battery 8 may also be a conventional battery.

Further, in order to reserve a sufficient operating space for the operating portion 621 of the threaded rod 62, the first side wall of the sampling tube 1 is connected to the grip 7 through the connecting rod 9, and the operating portion 621 is disposed between the grip 7 and the first side wall. With this configuration, interference of the handle 7 with the rotation of the operation portion 621 can be avoided.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. Oil quality control surveys sampling device, its characterized in that includes:

the sampling tube (1), the sampling tube (1) is of a transparent structure, and the outer wall of the sampling tube (1) is provided with scale marks (13);

the piston (2) is movably arranged in the sampling cylinder (1) along the length direction of the scale mark (13), and the piston (2) divides the inner cavity of the sampling cylinder (1) into a sample cavity (11) and an installation cavity (12);

the sampling device comprises a sampling head (3), wherein a sampling channel (31) is arranged on the sampling head (3), a sampling port (311) is formed at one end of the sampling channel (31), the sampling head (3) is connected with the sampling cylinder (1), and the other end of the sampling channel (31) is communicated with a sample cavity (11);

the electric telescopic rod (4) is positioned in the mounting cavity (12), the fixed end of the electric telescopic rod (4) is mounted on the sampling cylinder (1), the output end of the electric telescopic rod (4) is connected with the piston (2) and used for driving the piston (2) to move between a first preset position and a second preset position, and the second preset position is closer to the sampling head (3) than the first preset position;

the position switch (5) is positioned in the installation cavity (12), the piston (2) can be in contact with the position switch (5) to enable the position switch (5) to be switched to an enabled state, or can be separated from the position switch (5) to enable the position switch (5) to be switched to a forbidden state, the position switch (5) is electrically connected with the electric telescopic rod (4), and when the position switch (5) is in the forbidden state, the electric telescopic rod (4) can stop working; when the position switch (5) is in the enabling state, the electric telescopic rod (4) can work.

2. The oil product detecting and sampling device according to claim 1, further comprising a position adjusting structure (6), wherein the position adjusting structure (6) comprises:

the adjusting plate (61), the adjusting plate (61) is positioned in the mounting cavity (12), the adjusting plate (61) is movably mounted on the sampling tube (1) along the moving direction of the piston (2), and the position switch (5) is mounted on the adjusting plate (61);

and the adjusting driving unit is connected with the adjusting plate (61) and used for driving the adjusting plate (61) to move along the moving direction of the piston (2).

3. Oil quality testing and sampling device according to claim 2, characterized in that said adjusting plate (61) is constrained to rotate circumferentially with respect to said sampling cylinder (1), said adjusting drive unit comprising:

threaded rod (62), the one end of threaded rod (62) exposes and forms operating portion (621), and the other end passes stretch into behind the first lateral wall of sampling tube (1) installation cavity (12) internal rotation connect in regulating plate (61), threaded rod (62) with first lateral wall threaded connection.

4. An oil product detection and sampling device according to claim 3, characterized in that one of the inner wall of the sampling cylinder (1) and the adjusting plate (61) is provided with a sliding groove (14), and the other is provided with a sliding block (611), and the sliding block (611) is slidably arranged in the sliding groove (14) along the moving direction of the piston (2).

5. The oil quality testing and sampling device according to claim 4, characterized in that the side wall of the chute (14) at the end far away from the sampling head (3) forms a first limit surface (141), and the adjusting plate (61) has a first limit position which can abut against the first limit surface (141) along the moving direction of the piston (2); a second limiting surface (142) is formed on the side wall of the chute (14) close to one end of the sampling head (3);

when the adjusting plate (61) is at the first limit position, the piston (2) is positioned between the second limit surface (142) and the sampling head (3).

6. An oil product detection and sampling device according to claim 3, characterized in that the output end of the electric telescopic rod (4) is located in the installation cavity (12), and the adjusting plate (61) is movably sleeved outside the output end of the electric telescopic rod (4) along the moving direction of the piston (2).

7. The oil quality control sampling device according to any one of claims 1 to 6, further comprising:

the sampling device comprises a handheld handle (7), wherein the handheld handle (7) is located at one end, back to the sampling head (3), of the sampling cylinder (1), and the handheld handle (7) is connected with the sampling cylinder (1).

8. The oil product detection and sampling device according to claim 7, characterized in that the outer wall of the handle (7) is provided with anti-skid projections (73).

9. The oil product detection and sampling device according to claim 7, characterized in that a power supply battery (8) is installed in the hand-held handle (7), and the power supply battery (8) is electrically connected with the electric telescopic rod (4) and used for supplying power to the electric telescopic rod (4).

10. The oil product detection and sampling device according to claim 9, characterized in that a battery jar (71) with an open end is arranged on the handle (7), and the power supply battery (8) is detachably installed in the battery jar (71);

the handle (7) is detachably connected with a blocking cover (72) for blocking the opening.

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