Sample sampler capable of reducing sample breaking probability

Abstract

The utility model relates to a sampler capable of reducing sample breaking probability, which comprises a sampling barrel with a cavity, the sampling barrel comprises a guide cover at the upper part, a barrel body at the middle part and a sample collecting chamber at the lower part, the lower side of the outlet of the sample collecting chamber is connected with a sample discharging chamber, the center in the sample discharging chamber is provided with a central pipe, and a floating ball is arranged between the upper port of the central pipe and the sample discharging chamber; the guide cover is a big-end-down cavity circular truncated cone, the lower end of the guide cover is open and integrally connected with the upper end opening of the barrel body, the upper end face of the guide cover is closed and provided with an air inducing opening, and the air inducing opening is communicated with an air suction opening of the fan; a sample inlet is formed in the side wall of the guide cover, an outer port of the sample inlet is communicated with an air pipe, and the air pipe is arranged along the tangential direction of the side wall of the guide cover; a sampling chamber is connected to the lower side of the barrel body. By arranging the guide cover and the check curtain, the sample breakage rate is reduced, and the first discharging opening is quickly blocked through the floating ball capable of quickly moving upwards. The sample breakage rate is low, the samples can be concentrated in the sample collecting chamber to be uniformly discharged, and the whole process is orderly.

Description

TECHNICAL FIELD

[0001] The application relates to a grain sampler, in particular to a sampler capable of reducing the breakage rate of samples. BACKGROUND

[0002] The grain sampler is a device for sampling the grain loaded in a granary or a truck, which is a device for sampling by using negative pressure. The device is connected with an air inlet through a sampling head and a hose, and connected with an air outlet through a fan and a hose. When the fan is started, negative pressure is formed in the sampling bucket, and the grain is sucked into the sampling bucket through the hose. Since the air inlet of the fan is arranged in the tangential direction of the inner wall of the sampling bucket, the grain will rotate in the sampling bucket and deposit on the lower part of the sampling bucket along the inner wall under the action of centrifugal force and gravity, and the sampling is completed. The defects are that the dust, impurities and gourd in the grain can cause the butterfly valve to be closed incompletely, and the sampling system cannot work normally. At the same time, the sample is in an accelerated state when entering the sampling bucket, and the initial speed is high. The sample will first rotate upward along the inner wall, and then rotate downward after the speed slows down. Therefore, the sample is easy to collide with the top of the bucket during rotation, causing damage.

[0003] In order to solve the problem that impurities affect the closing of the butterfly valve, the prior art discloses a grain sampler in the authorized announcement CN209743662U, which connects the sampling bucket and the measuring bucket through a communication port, and sets a valve rod assembly at the communication port. The valve rod assembly includes a valve rod, which is arranged in a guide sleeve and fixedly connected with the air door through the air outlet at one end and extends into the measuring bucket through the communication port at the other end. Rubber balls I and II are fixed on the part of the valve rod in the measuring bucket. The rubber ball I corresponds to the communication port, and the rubber ball II corresponds to the discharge port. The pressure in the sampling bucket is controlled by starting and stopping the fan, so as to form a pressure difference with the measuring bucket, and then the up and down movement of the rubber ball is controlled, and finally the sampling and sampling are controlled. The main defects of this structure are as follows: after the fan is started for the first time, the sample enters the sampling bucket and forms a certain thickness at the lower part of the sampling bucket. After the fan is stopped, the sample falls into the measuring bucket. At this time, the sample will submerge the rubber ball I, and the sample will form a certain thickness of the blocking layer between the upper part of the measuring bucket and the rubber ball I. After the fan is started again, under the blocking of the sample, at the same time, the excess material discharge port is in communication with the outside, the pressure difference of the rubber ball I is reduced, and the rubber ball I may not move up or move up slowly. The rubber ball II loses the blocking effect, the sample entering the sampling bucket directly falls into the measuring bucket, and the sampling bucket loses the function of temporarily storing the sample. The other defects of this structure are that it does not consider the collision between the sample and the bucket wall, so that part of the sample will collide with the top of the upper end at high speed when entering the sampling bucket for the first time, and the breakage rate is high.

[0004] Therefore, in order to ensure that the sample does not fall out of the sampling container during sampling and to prevent damage to the sample, it is necessary to design a grain sampler that also uses negative pressure for sampling. Summary of the Invention

[0005] The purpose of this application is to provide a sampler that uses negative pressure for sampling, which can ensure that the sample does not fall out of the sampling container during the sampling process and can avoid the sample colliding with the top of the container, thereby reducing the probability of sample breakage.

[0006] This application is implemented as follows: a sampler that reduces the probability of sample breakage includes a sampler barrel with a cavity. The sampler barrel includes an upper guide cover, a middle barrel body and a lower sample collection chamber. A sample discharge chamber is connected to the lower side of the sample collection chamber outlet. A central tube is set in the center of the sample discharge chamber. A float ball is set between the upper end of the central tube and the sample discharge chamber.

[0007] The guide cover is a hollow frustum with a smaller top and a larger bottom. The lower end of the guide cover is open and integrally connected to the upper end of the barrel. The upper end of the guide cover is closed and has an air inlet. The air inlet is connected to the air intake of the fan. A sample inlet is provided on the side wall of the guide cover. A duct is connected to the outer end of the sample inlet. The duct is laid out along the tangent of the side wall of the guide cover.

[0008] A sampling chamber is connected to the lower side of the barrel.

[0009] The sampling chamber is a hollow cylinder with an open top and a closed bottom. Several support rods are evenly distributed around the open top circumference. The upper end of each support rod is fixedly connected to the lower end circumference of the sampling barrel. A sampling port is provided on one side of the sampling chamber.

[0010] Several support rods form a cylindrical cavity, creating a sample channel. A thin film is wrapped around the support rods, serving as the sidewall of the cylindrical cavity.

[0011] The sampling chamber is equipped with wheels on both sides of the front bottom surface and support legs on the rear bottom surface.

[0012] The sample collection chamber is a funnel-shaped cavity, and the first discharge port is opened at the lowest end of the cavity.

[0013] The sample dispensing chamber is a spherical cavity with an opening at the top that connects to the first discharge port of the sample collection chamber. A second discharge port is provided at the bottom of the sample dispensing chamber, and a central tube is installed inside the second discharge port. The central tube is fixed inside the second discharge port by a connecting rod.

[0014] Several connecting rods are evenly arranged around the outer circumference of the central tube, and the outer ends of the connecting rods are fixedly connected to the inner wall of the discharge chamber at the second discharge port.

[0015] The float comprises an integrally connected upper hemisphere and a lower hemisphere, with the radius of the upper hemisphere being larger than that of the lower hemisphere, and the radius of the lower hemisphere being larger than that of the cross-sectional radius of the central tube.

[0016] The air inlet cover is provided with a filter screen.

[0017] An outer blocking curtain is arranged at the second discharge port at the lower end of the sample discharge chamber, and an inner blocking curtain is arranged at the lower end port of the center pipe.

[0018] By setting the guide cover, the sample sucked in is guided downward to prevent the sample from colliding with the top, and the state of spiral descending of the sample is realized to reduce the sample breakage rate. By setting the upper large and lower small of the floating ball, the windward area can be increased so that the floating ball can move upward quickly to block the first discharge port. By setting the blocking curtain, the sample can have a soft collision with the blocking curtain during falling to reduce the falling speed of the sample and further reduce the sample breakage rate. Therefore, compared with the prior art, the sample breakage rate is low, and the sample sampling can be quickly completed by using negative pressure. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific structure of the present application is shown in the following drawings and examples:

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a sectional view structural schematic diagram of the present application without the sampling barrel;

[0022] Figure 3 is a structural schematic diagram of the present application with walking wheels;

[0023] Figure 4 is a bottom view structural schematic diagram of the sample discharge chamber;

[0024] Figure 5 is a structural schematic diagram of the sample discharge chamber provided with a buffer belt.

[0025] Legend: 1. fan, 2. guide cover, 3. air pipe, 4. quick connector, 5. sampling barrel, 6. sample collection chamber, 7. supporting rod, 8. sampling chamber, 9. filter screen, 10. floating ball, 10-1. upper hemisphere, 10-2. lower hemisphere, 11. center pipe, 12. sample discharge port, 13. sample discharge chamber, 14. walking wheel, 15. supporting leg, 16. connecting rod, 17. outer buffer belt, 18. inner buffer belt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Example: Figures 1-4 As shown, the sampler for reducing the probability of sample breakage includes a hollow sample container 5, which includes an upper guide cover 2, a middle container body, and a lower sample collection chamber 6. A discharge chamber 13 is connected to the lower side of the outlet of the sample collection chamber 6. A central tube 11 is set in the center of the discharge chamber 13, and a float ball 10 is set between the upper end of the central tube 11 and the discharge chamber 13. The guide cover 2 is a hollow frustum with a smaller upper part and a larger lower part. The lower end of the guide cover 2 is open and is integrally connected to the upper end of the container body. The upper end face of the guide cover 2 is closed and has an air inlet, which is connected to the air intake of the fan 1. A sample inlet is opened on the side wall of the guide cover 2, and an air duct 3 is connected to the outer end of the sample inlet. The air duct 3 is arranged along the tangential direction of the side wall of the guide cover 2. A sampling chamber 8 is connected to the lower side of the container body.

[0029] Furthermore, the sampling chamber 8 is a hollow cylindrical cavity with an open top and a closed bottom. Several support rods 7 are evenly distributed around the circumference of the open top, and the upper end of each support rod 7 is fixedly connected to the lower end circumference of the sampling barrel 5. A sampling port is provided on one side of the sampling chamber 8.

[0030] Furthermore, several support rods 7 form a cylindrical cavity, creating a sample discharge channel. A transparent film is wrapped around the support rods 7, serving as the sidewall of the cylindrical cavity to prevent the sample from falling out during descent. It is important to note that this film cannot be made into a sealed structure; an air inlet must be provided to allow communication between the outside and the sample discharge chamber 13.

[0031] Furthermore, wheels 14 are installed on both sides of the bottom front of the sampling chamber 8, and support legs 15 are installed on the bottom rear of the sampling chamber 8. This structure allows the entire rear end to be lifted slightly, enabling it to move quickly using the wheels 14. Once in position, the support legs 15 increase friction when they contact the ground, thus maintaining a certain level of stability.

[0032] Furthermore, the sample collection chamber 6 is a funnel-shaped cavity, and a first discharge port is provided at the lowest end of the cavity.

[0033] Furthermore, the sample discharge chamber 13 is a spherical cavity. The upper end of the sample discharge chamber 13 is open and communicates with the first discharge port of the sample collection chamber 6. The lower end of the sample discharge chamber 13 has a second discharge port. A central tube 11 is installed in the second discharge port and is fixed in the second discharge port by connecting rods 16. Several connecting rods 16 are evenly arranged around the outer circumference of the central tube 11. The outer ends of the connecting rods 16 are fixedly connected to the inner wall of the sample discharge chamber 13 at the second discharge port. The space between any two connecting rods 16 and the central tube 11 can all serve as sample discharge channels.

[0034] Furthermore, the float 10 comprises an integrally connected upper hemisphere 10-1 and a lower hemisphere 10-2. The radius of the upper hemisphere 10-1 is larger than the radius of the lower hemisphere 10-2, and the radius of the lower hemisphere 10-2 is larger than the cross-sectional radius of the central tube 11. This structure of the float 10 can form a large windward surface at the junction of the upper hemisphere 10-1 and the lower hemisphere 10-2, which is beneficial for rapid floating when a negative pressure is formed between the sample collection chamber 6 and the sample discharge chamber 13.

[0035] Furthermore, a filter screen is installed outside the air inlet. The filter screen prevents seeds from being sucked out of the air inlet. The filter screen can be formed as a cover, covering the bottom of the air inlet; or it can be formed as a layer, sealing inside or outside the air inlet.

[0036] like Figure 5 As shown, to reduce the falling speed of the sample after it is discharged from the discharge chamber 13, an outer baffle 17 is installed at the second discharge port at the lower end of the discharge chamber 13, and an inner baffle 18 is installed at the lower end of the central tube 11. The outer baffle 17 and the inner baffle 18 hang naturally around the second discharge port and the lower end of the central tube 11, respectively. Plastic films can be used. During the falling process, the sample collides with the outer baffle 17 and the inner baffle 18, which can reduce the falling speed and thus reduce the breakage rate of the sample.

[0037] In use, the air duct 3 is connected to the sampling tube via the quick connector 4. After the sampling tube is inserted into the sampling position, the blower 1 is started. The sample enters the guide cover 2 tangentially from the air duct 3. Under the guidance of the inclined side wall of the guide cover 2, the sample moves spirally downward along the guide cover 2 and the inner wall of the sample collection chamber 6, and finally accumulates at the first discharge port of the sample collection chamber 6.

[0038] After the blower is started, a pressure difference is formed between the sample collection chamber 6 and the sample discharge chamber 13. Under the action of the pressure difference, the float 10 begins to rise until the upper hemisphere 10-1 blocks the first discharge port.

[0039] At this time, the outer curtain 17 and the inner curtain 18 will move closer to each other under the action of rapid air flow, narrowing the sample falling channel. As a result, the sample will inevitably collide with the outer curtain 17 and the inner curtain 18 during the falling process, thereby reducing the falling speed.

[0040] After sampling, the blower 1 is turned off, the float 10 falls, and the lower hemisphere 10-2 falls to the upper port of the central tube 11, clearing the falling channel. The sample falls from the outside of the central tube 11 into the sampling chamber 8, and the inspectors can take out the sample from the sampling port for inspection.

[0041] The above technical features constitute the embodiments of this application, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A sampler for reducing the probability of sample breakage, comprising a hollow sample container, characterized in that: The sampling bucket includes an upper guide cover, a middle bucket body and a lower sample collection chamber. A sample discharge chamber is connected to the lower side of the sample collection chamber outlet. A central tube is set in the center of the sample discharge chamber, and a float is set between the upper end of the central tube and the sample discharge chamber. The guide cover is a hollow frustum with a smaller top and a larger bottom. The lower end of the guide cover is open and integrally connected to the upper end of the barrel. The upper end of the guide cover is closed and has an air inlet. The air inlet is connected to the air intake of the fan. A sample inlet is provided on the side wall of the guide cover. A duct is connected to the outer end of the sample inlet. The duct is laid out along the tangent of the side wall of the guide cover. A sampling chamber is connected to the lower side of the barrel.

2. The sampler for reducing the probability of sample breakage according to claim 1, characterized in that: The sampling chamber is a hollow cylinder with an open top and a closed bottom. Several support rods are evenly distributed around the open top circumference. The upper end of each support rod is fixedly connected to the lower end circumference of the sampling barrel. A sampling port is provided on one side of the sampling chamber.

3. The sampler for reducing the probability of sample breakage according to claim 2, characterized in that: Several support rods form a cylindrical cavity, creating a sample channel. A thin film is wrapped around the support rods, serving as the sidewall of the cylindrical cavity.

4. The sampler for reducing the probability of sample breakage according to claim 1, 2, or 3, characterized in that: The sampling chamber is equipped with wheels on both sides of the front bottom surface and support legs on the rear bottom surface.

5. The sampler for reducing the probability of sample breakage according to claim 1, 2, or 3, characterized in that: The sample collection chamber is a funnel-shaped cavity, and the first discharge port is opened at the lowest end of the cavity.

6. The sampler for reducing the probability of sample breakage according to claim 5, characterized in that: The sample dispensing chamber is a spherical cavity with an opening at the top that connects to the first discharge port of the sample collection chamber. A second discharge port is provided at the bottom of the sample dispensing chamber, and a central tube is installed inside the second discharge port. The central tube is fixed inside the second discharge port by a connecting rod.

7. The sampler for reducing the probability of sample breakage according to claim 6, characterized in that: Several connecting rods are evenly arranged around the outer circumference of the central tube, and the outer ends of the connecting rods are fixedly connected to the inner wall of the discharge chamber at the second discharge port.

8. The sampler for reducing the probability of sample breakage according to claim 1, 2, 3, 6, or 7, characterized in that: The float comprises an integrally connected upper hemisphere and a lower hemisphere, with the radius of the upper hemisphere being larger than that of the lower hemisphere, and the radius of the lower hemisphere being larger than that of the cross-sectional radius of the central tube.

9. The sampler for reducing the probability of sample breakage according to claim 1, 2, 3, 6, or 7, characterized in that: A filter screen is installed on the outside of the air inlet.

10. The sampler for reducing the probability of sample breakage according to claim 1, 2, 3, 6, or 7, characterized in that: An outer baffle is installed at the second discharge port at the lower end of the sample dispensing chamber, and an inner baffle is installed at the lower end of the central tube.

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