Sampling device for sampling of powder bin

Abstract

The utility model discloses a sampling device for sampling of a powder bin. The sampling device comprises a sampling pipe, a sampling valve, a hopper, a blanking pipe and a blanking valve, one end of the sampling pipe is communicated with the powder bin feeding pipe, and the other end is communicated with the hopper; the hopper is arranged on one side of the feeding pipe of the powder bin and used for storing powder collected by the sampling pipe, the top of the hopper is closed and provided with a ventilation cap, and a bottom outlet of the hopper is connected with the discharging pipe; the sampling valve is arranged on the sampling pipe and is used for controlling communication or separation of the hopper and the feeding pipe of the powder bin; the discharging valve is arranged on the discharging pipe and used for controlling discharging of the hopper. According to the automatic sampling device, manual work can be replaced for automatic sampling, different time points can be selected for automatic sampling, the sampling representativeness of powder is greatly improved, and the risk that sampling personnel fall off from a high place can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to sampling device technical field, concretely relates to a sampling device for sampling of powder bin. BACKGROUND

[0002] As a common building construction material, ready-mixed concrete is mainly composed of cement, fly ash, sand and stone, water and admixture. The quality of ready-mixed concrete directly affects the construction quality and safety reliability of building structure, so it is necessary to control the quality of raw materials from the source. The ready-mixed concrete production enterprises usually take samples by batch when the raw materials enter the site and entrust a third-party testing agency to test. Taking cement and fly ash as an example, the usual sampling method is that the laboratory technician takes samples manually with a sampler at the top of the powder transport tank truck. The existing sampling method has the problems of large workload, high risk of falling from a high place for the sampler, and poor representativeness of the sample and unreliable test results when the materials in the transport truck are not uniform. SUMMARY

[0003] To solve the above problems, the utility model provides a sampling device for sampling of powder bin.

[0004] The technical scheme adopted by the utility model is:

[0005] A sampling device for sampling of powder bin, comprising a sampling pipe, a sampling valve, a hopper, a discharging pipe and a discharging valve; one end of the sampling pipe is in communication with the feeding pipe of the powder bin, and the other end is in communication with the hopper; the hopper is arranged on one side of the feeding pipe of the powder bin and is used for storing the powder collected by the sampling pipe; the top of the hopper is closed and provided with a breathable cap, and the bottom outlet of the hopper is connected with the discharging pipe; the sampling valve is arranged on the sampling pipe and is used for controlling the communication or isolation between the hopper and the feeding pipe of the powder bin; and the discharging valve is arranged on the discharging pipe and is used for controlling the discharge of the hopper.

[0006] Further, a vibrator is arranged on the hopper. The vibrator is used for preventing the outlet of the hopper from being blocked when discharging.

[0007] Further, the hopper is conical, and the vibrator is arranged at the middle and lower part of the conical hopper. The conical hopper is beneficial to smooth discharging and prevents the sampling powder from remaining in the hopper and affecting the detection results of the next time. The arrangement of the vibrator at the middle and lower part of the conical hopper is more beneficial to smooth discharging and prevents the powder from blocking the outlet.

[0008] Further, the volume of the hopper is 10-15 liters. The volume meets the requirement of the amount of sample for testing, and too large volume will cause waste of materials and increase of the manufacturing cost of the sampling device.

[0009] Further, the vibrator is a pneumatic vibrator. The pneumatic vibrator is suitable for a dusty environment and has a low failure rate.

[0010] Further, the sampling pipe is V-shaped, and one end of the V-shaped sampling pipe is connected to the upwardly inclined powder bin feeding pipe.

[0011] Further, the sampling valve is a pneumatic butterfly valve, which is arranged at the end of the sampling pipe close to the powder bin feeding pipe.

[0012] Further, the discharging valve is a pneumatic butterfly valve.

[0013] The present application has the following advantages:

[0014] 1. The sampling device can automatically sample instead of manual sampling, and can sample at different time points, greatly improving the sampling representativeness of the powder and avoiding the risk of falling from a high place for the sampler.

[0015] 2. The device has a simple structure, and can automatically sample by using the feeding pressure of the bin, without the need for an additional power source, and is easy to operate and safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The sampling device structure diagram of the present application. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely in combination with the drawings and a preferred embodiment.

[0018] Referring to Figure 1 A sampling device for sampling of a powder bin, comprising a sampling pipe 1, a sampling valve 2, a hopper 3, a discharging pipe 6 and a discharging valve 7; one end of the sampling pipe 1 is in communication with a powder bin feeding pipe 100, and the other end is in communication with the hopper 3; the hopper 3 is arranged on one side of the powder bin feeding pipe 100, and is used for storing the powder collected by the sampling pipe 1; the top of the hopper is closed and is provided with a breather cap 4; the bottom outlet of the hopper 3 is connected to the discharging pipe 6; the sampling valve 2 is arranged on the sampling pipe 1, and is used for controlling the communication or isolation between the hopper 3 and the powder bin feeding pipe 100; and the discharging valve 7 is arranged on the discharging pipe 6, and is used for controlling the discharge of the hopper 3.

[0019] The hopper 3 can be fixed on one side of the powder bin feeding pipe 100 by a support. Preferably, the hopper 3 is conical or square conical, and has a volume of 10-15 liters and is made of stainless steel plate. The top of the hopper is closed by a top plate, and the top plate is provided with a breather opening and a feeding opening; the feeding opening is connected to a feeding pipe, and the breather opening is connected to the breather cap 4. The bottom of the hopper is provided with a discharging opening, and the discharging opening is connected to a section of the discharging pipe 6. The breather cap is a prior art, and is used for discharging the gas carried in the powder during feeding of the hopper, and filtering out the powder. A pneumatic vibrator 5 is arranged at the middle and lower part of the hopper 3.

[0020] The sampling pipe 1 is preferably made of DN40 stainless steel pipe, which is welded in V shape by two sections of stainless steel pipe, the V-shaped stainless steel pipe tip points upward, one end is obliquely inserted into the powder bin feeding pipe 100 and is sealingly welded with the powder bin feeding pipe 100, and the other end is obliquely inserted into the hopper feeding port and is sealingly welded with the feeding port.

[0021] The discharging pipe 6 is preferably made of DN100 stainless steel pipe, which is vertically welded on the discharging port at the bottom of the hopper 3.

[0022] The sampling valve 2 is preferably a DN40 pneumatic double-clamp butterfly valve, which is connected with the sampling pipe 1 near the one end of the powder bin feeding pipe 100 through screws. The discharging valve 7 is a DN100 pneumatic double-clamp butterfly valve, which is connected with the middle part of the discharging pipe 6 through screws.

[0023] When the powder transport tank truck is feeding the powder bin, the sampling time is set, the sampling valve 2 is controlled to be opened, the materials in the tank truck enter the hopper 3 through the sampling pipe 1; when the materials stored in the hopper 3 reach the set requirement, the material quantity in the hopper can be estimated according to the sampling time, or a material level sensor is installed on the hopper to measure the feeding quantity, a sampling bucket is placed below the discharging pipe 6, the discharging valve 7 is controlled to be opened, the materials fall into the sampling bucket, the pneumatic vibrator 5 is started to vibrate and discharge during the discharging process, the discharging valve 7 is closed after the materials are discharged, and the sampling is completed.

[0024] When the powder transport tank truck is feeding the powder bin, the sampling time is set, the sampling valve 2 is controlled to be opened, the materials in the tank truck enter the hopper 3 through the sampling pipe 1; when the materials stored in the hopper 3 reach the set requirement, the material quantity in the hopper can be estimated according to the sampling time, or a material level sensor is installed on the hopper to measure the feeding quantity, a sampling bucket is placed below the discharging pipe 6, the discharging valve 7 is controlled to be opened, the materials fall into the sampling bucket, the pneumatic vibrator 5 is started to vibrate and discharge during the discharging process, the discharging valve 7 is closed after the materials are discharged, and the sampling is completed.

[0025] The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the principle of the present application, some improvements and refinements can be made, which are also within the protection scope of the present application.

Claims

1. A sampling device for sampling powder silos, characterized in that, It includes a sampling tube (1), a sampling valve (2), a hopper (3), a discharge pipe (6), and a discharge valve (7); one end of the sampling tube (1) is connected to the powder silo feed pipe (100), and the other end is connected to the hopper (3); the hopper (3) is located on one side of the powder silo feed pipe (100) and is used to store the powder collected by the sampling tube (1). The top of the hopper is closed and equipped with a vent cap (4). The bottom outlet of the hopper (3) is connected to the discharge pipe (6); the sampling valve (2) is located on the sampling tube (1) and is used to control the connection or disconnection between the hopper (3) and the powder silo feed pipe (100); the discharge valve (7) is located on the discharge pipe (6) and is used to control the discharge of the hopper (3).

2. The sampling device for sampling powder silos according to claim 1, characterized in that, A vibrator (5) is installed on the hopper (3).

3. A sampling device for sampling powder silos according to claim 2, characterized in that, The hopper (3) is conical, and the vibrator (5) is located in the lower middle part of the conical hopper.

4. A sampling device for sampling powder silos according to claim 1, characterized in that, The volume of the hopper (3) is 10 to 15 liters.

5. A sampling device for sampling powder silos according to claim 1, characterized in that, The vibrator (5) is a pneumatic vibrator.

6. A sampling device for sampling powder silos according to claim 1, characterized in that, The sampling tube (1) is V-shaped, and one end of the V-shaped sampling tube is inclined upward to the powder silo feeding pipe (100).

7. A sampling device for sampling powder silos according to claim 1, characterized in that, The sampling valve (2) is a pneumatic butterfly valve, which is located at one end of the sampling pipe (1) near the powder silo feeding pipe (100).

8. A sampling device for sampling powder silos according to claim 1, characterized in that, The discharge valve (7) is a pneumatic butterfly valve.

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