Negative pressure pulsation suction device

Abstract

The utility model discloses a negative pressure pulsation suction device, which is used for quarantine inspection of particle sample materials and comprises an electric cabinet (1), a fan (2), an angle seat valve (4) and a vacuum tank (8), the fan (2) and the angle seat valve (4) are connected with the electric cabinet (1), a negative pressure air port of the fan (2) is connected with the vacuum tank (8) through a suction pipe, the angle seat valve (4) is arranged on the suction pipe, and the vacuum tank (8) is connected with the fan (2). And the feeding hole of the vacuum tank (8) is connected with a material receiving hole (10) through a pipeline. According to the utility model, the suction force is large, the pipe blockage condition is avoided, and the back flushing valve is arranged, so that dust in a sample material is prevented from being sucked out. The device has sampling and back flushing functions, does not remain sample materials in the system, ensures that the next sampling is not polluted, and can be suitable for various sample materials and various sampling occasions.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling components for quarantine inspection of particle samples, in particular to a negative pressure pulsating suction device. Background Art

[0002] The existing negative pressure pulsating suction device for samples uses a vacuum conveyor to achieve pulsating suction, but has poor suction force and is prone to blockage during the suction process. The pulsating suction process causes food to accumulate in the pipeline and will suck out dust and impurities in the sample, affecting the sampling effect and representativeness. Utility Model Content

[0003] The utility model provides a negative pressure pulsation suction device, aiming to solve the technical problems existing in the prior art.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A negative pressure pulsating suction device is used for quarantine inspection of particle samples, comprising an electric control box, a fan, an angle seat valve and a vacuum tank. The fan and the angle seat valve are connected to the electric control box, the negative pressure air outlet of the fan is connected to the vacuum tank through a suction pipe, the angle seat valve is arranged on the suction pipe, and the feed port of the vacuum tank is connected to a material receiving port through a pipeline.

[0006] Specifically, a long suction three-way valve is arranged at the material receiving port, two ports of the long suction three-way valve are respectively connected to the vacuum tank and the material receiving port, and the other port is connected to the outside.

[0007] Specifically, a back-blowing three-way valve is provided at the positive-pressure air outlet of the fan, and the other two ports of the back-blowing three-way valve are respectively connected to the back-blowing pipe and the outside world.

[0008] Specifically, a suction three-way valve is provided at the discharge port of the vacuum tank, and the other two ports of the suction three-way valve are respectively connected to the long suction three-way valve and the back-blowing pipe.

[0009] Specifically, a compressed air cylinder is arranged on the upper part of the vacuum tank, the compressed air cylinder is connected with a back-blowing valve, and a stop valve is arranged at the discharge port at the bottom of the vacuum tank.

[0010] Specifically, the back-blowing three-way valve, the suction three-way valve, the back-blowing valve and the long-suction three-way valve are all connected to the electric control box.

[0011] Specifically, the material receiving port is connected to a sampling device.

[0012] Based on the above technical solution, the following technical effects can be produced:

[0013] 1. The utility model provides a negative pressure pulsating suction device. The fan rotates to generate vacuum negative pressure suction. The switch of the angle seat valve adjusts the vacuum negative pressure suction to pulsating suction. The sample material is pulsatingly sucked into the pipeline through the material receiving port. After a certain number of times, the long suction three-way valve is actuated to suck the sample material in the pipeline into the vacuum tank at one time. The material retained between the long suction three-way valve and the material receiving port is blown out by backblowing, and there will be no material stored in the entire pipeline.

[0014] 2. The utility model uses a fan and an angle seat valve to achieve pulsating negative pressure suction, which has strong suction and is not prone to blockage during the suction process; the frequency, number and other parameters of the pulsating suction can be adjusted through the electric control box to adapt to a variety of sampling occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] In the figure: 1-electric control system, 2-blower, 3-back-blowing three-way valve, 4-angle seat valve, 5-stop valve, 6-suction three-way valve, 7-back-blowing valve, 8-vacuum tank, 9-long suction three-way valve, 10-material receiving port. DETAILED DESCRIPTION

[0017] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1As shown, a negative pressure pulsating suction device is used for quarantine inspection of particle samples, including an electric control box 1, a fan 2, an angle seat valve 4 and a vacuum tank 8. The fan 2 and the angle seat valve 4 are connected to the electric control box 1, the negative pressure air outlet of the fan 2 is connected to the vacuum tank 8 through a suction pipe, the angle seat valve 4 is arranged on the suction pipe, and the feed port of the vacuum tank 8 is connected to a material receiving port 10 through a pipeline.

[0022] According to one embodiment of the utility model, a long suction three-way valve 9 is provided at the material receiving port 10, two ports of the long suction three-way valve 9 are respectively connected to the vacuum tank 8 and the material receiving port 10, and the other port is connected to the outside world. During pulsating suction, the long suction three-way valve 9 connects the vacuum tank 8 with the material receiving port 10 to absorb the material. After a certain period of suction, the long suction three-way valve 9 is switched to connect the vacuum tank 8 with the outside air to suck the material in the pipeline between the long suction three-way valve 9 and the vacuum tank 8 into the vacuum tank.

[0023] According to an embodiment of the utility model, a back-blowing three-way valve 3 is provided at the positive-pressure air outlet of the fan 2, and the other two ports of the back-blowing three-way valve 3 are respectively connected to the back-blowing pipe and the outside world. When the device is sucking, the back-blowing three-way valve 3 connects the positive-pressure air outlet of the fan 2 with the outside air; when back-blowing is required, the back-blowing three-way valve 3 connects the positive-pressure air outlet of the fan 2 with the back-blowing pipe.

[0024] According to an embodiment of the utility model, a suction three-way valve 6 is provided at the discharge port of the vacuum tank 8, and the other two ports of the suction three-way valve 6 are respectively connected to the long suction three-way valve 9 and the back-blowing pipe. When the device is sucking, the suction three-way valve 6 makes the long suction three-way valve 9 communicate with the vacuum tank 8; when back-blowing, the suction three-way valve 6 makes the long suction three-way valve 9 communicate with the back-blowing pipe.

[0025] According to an embodiment of the utility model, a compressed air cylinder is arranged on the upper part of the vacuum tank 8, the compressed air cylinder is connected to a back-blowing valve 7, and a stop valve 5 is arranged at the discharge port at the bottom of the vacuum tank 8.

[0026] According to an embodiment of the utility model, the back-blowing three-way valve 3 , the suction three-way valve 6 , the back-blowing valve 7 and the long-suction three-way valve 9 are all connected to the electric control box 1 .

[0027] According to an embodiment of the present invention, the material receiving port 10 is connected to a sampling device.

[0028] The working principle of a small pneumatic combined Y-type three-way device provided by the utility model is as follows:

[0029] The fan 2 for absorbing materials rotates to generate vacuum negative pressure suction, and the switch of the angle seat valve 4 adjusts the vacuum negative pressure suction to pulsating suction, and the sample material is pulsatingly sucked into the pipeline through the material receiving port 10. After a certain number of times, the long suction three-way valve 9 is switched to connect the vacuum tank 8 with the outside air, and the fan 2 continuously uses negative pressure to suck the material retained in the pipeline into the vacuum tank 8. After the absorption is completed, the back-blowing three-way valve 3 is switched to connect the positive pressure air outlet of the fan 2 with the back-blowing pipe, and at the same time, the absorption three-way valve 6 is switched to connect the back-blowing pipe with the long suction three-way valve 9, and the material between the long suction three-way valve 9 and the material receiving port 10 is blown out by positive pressure; after the absorption and back-blowing are completed, the stop valve 5 is opened to release the sample material.

[0030] The utility model is described in detail above with reference to the accompanying drawings and embodiments, but the utility model is not limited to the above embodiments, and various changes can be made within the scope of ordinary technicians in the field without departing from the purpose of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope of protection of the utility model.

Claims

1. A negative pressure pulsating suction device for quarantine inspection of particle samples, comprising an electric control box (1), a fan (2), an angle seat valve (4) and a vacuum tank (8), characterized in that: The fan (2) and the angle seat valve (4) are connected to the electric control box (1); the negative pressure air outlet of the fan (2) is connected to a vacuum tank (8) via a suction pipe; the angle seat valve (4) is arranged on the suction pipe; and the feed inlet of the vacuum tank (8) is connected to a material receiving port (10) via a pipeline.

2. A negative pressure pulsation suction device according to claim 1, characterized in that: A long suction three-way valve (9) is provided at the material receiving port (10), two ports of the long suction three-way valve (9) are respectively connected to the vacuum tank (8) and the material receiving port (10), and the other port is connected to the outside.

3. A negative pressure pulsation suction device according to claim 2, characterized in that: A back-blowing three-way valve (3) is provided at the positive-pressure air outlet of the fan (2), and the other two outlets of the back-blowing three-way valve (3) are respectively connected to the back-blowing pipe and the outside world.

4. A negative pressure pulsation suction device according to claim 3, characterized in that: A suction three-way valve (6) is provided at the discharge port of the vacuum tank (8), and the other two ports of the suction three-way valve (6) are respectively connected to the long suction three-way valve (9) and the back-blowing pipe.

5. A negative pressure pulsation suction device according to claim 4, characterized in that: A compressed air cylinder is arranged on the upper part of the vacuum tank (8), the compressed air cylinder is connected to a back-blowing valve (7), and a stop valve (5) is arranged at the discharge port at the bottom of the vacuum tank (8).

6. A negative pressure pulsation suction device according to claim 5, characterized in that: The back-blowing three-way valve (3), the suction three-way valve (6), the back-blowing valve (7) and the long-suction three-way valve (9) are all connected to the electric control box (1).

7. A negative pressure pulsation suction device according to claim 1, characterized in that: The material receiving port (10) is connected to a sampling device.

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