Novel sampling pump device

Abstract

A novel sampling pump device comprises a sampling pump body, a sampling bag, sampling pipes and a movable pipe, a screw hole is formed in the front side of a volute of the sampling pump body, the sampling pipe at the rear end and the volute are installed together through threads, the sampling pipes are movably sleeved together, and air guide holes are formed in one end of the front side of the sampling pipe at the foremost end and one end of the rear side of the movable pipe respectively. A gas-guide tube is mounted in the gas-guide hole of the sampling tube at the foremost end, and the movable tube is in threaded connection with the gas-guide tube; the lower end of the volute is provided with a branch pipe, the lower end of the shell of the sampling pump body is provided with a fixed table, the front end and the rear end of each sampling bag are respectively provided with a valve, the other end of the front-end valve is internally provided with an air inlet pipe, the sampling bags are placed in the fixed table, and the air inlet pipes of the sampling bags are connected with the branch pipe of the volute through hoses. According to the utility model, the sampling bag is convenient to carry and store; and residual air in the sampling bag can be effectively discharged during sampling, so that the amount of air in the sampled gas is relatively less, and the probability of errors of corresponding data of waste gas analysis after sampling is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to a novel sampling pump device. Background Art

[0002] In environmental protection departments, manufacturers, etc., in order to detect the content of various gases in the waste gas discharged from relevant areas, sampling pump equipment, etc. is used to sample the gas. The structure of the sampling pump equipment includes a sampling pump body and supporting sampling tubes and sampling bags. Specifically, the sampling tube is located at the front end of the volute air inlet pipe of the sampling pump body. The inlet pipe of the sampling bag and the volute exhaust pipe are connected by a hose. During sampling, the sampling pump is powered on and the impeller in its volute generates negative pressure to suck the gas in the sampling area and then send it into the sampling bag through the exhaust pipe. After sampling, the sampling personnel close the valve of the sampling bag and remove the sampling bag to complete the sampling work (the sampled gas is subjected to physical and chemical analysis, etc. through the corresponding detection equipment in the detection room to obtain the data of various gases in the waste gas after sampling).

[0003] With the development of technology, the performance of sampling pump equipment has also been improved. For example, in the authorized patent with the Chinese patent number "201420233035.5" and the patent name "Cantilever beam type gas sampling pump", its content records that "in the utility model, the pump rotor is directly fixed on the shaft of the drive motor, with a simple structure, light weight and small vibration; through the double eccentricity and multi-point fastening method of the cylinder block and the eccentric adjustment part, the free adjustment of the eccentricity of the cylinder block is realized, the eccentric adjustment range of the cylinder block is expanded, the sampling efficiency is greatly improved, and the eccentricity of the cylinder block can be readjusted while keeping the position of the air nozzle unchanged during use". Although the comparative patent has achieved the invention technical effects described therein, due to structural and functional limitations, there are still the following technical drawbacks. First: The sampling tube at the front end of the sampling pump cannot be retracted. In this way, due to the relatively long length of the sampling tube, it will bring certain inconveniences to carrying and storage. Second: The front end of the sampling tube cannot be bent at an angle. When sampling some areas with limited sampling positions, it will have an adverse impact on the sampling work of the sampling personnel (for example, when the sampling personnel stand on the ground and are lower than the height of the exhaust port of a certain device, and the exhaust port is in a horizontal distribution structure, then the sampling personnel can only climb to a high place and in a horizontal manner to conveniently align the front end of the sampling tube with the inside of the exhaust port for sampling). Third: The supporting sampling bag only has an inlet pipe (a valve is installed at the front end). In actual sampling, if the air in the sampling bag is not effectively discharged, the subsequent sampled gas will be diluted by the air, which will have a certain impact on the final physical and chemical analysis data (for example, the concentration data of a certain harmful gas component decreases). Summary of the Utility Model

[0004] In order to overcome the drawbacks of existing sampling pump devices due to structural limitations as described in the background art, the present utility model provides a novel sampling pump device in which, under the combined action of multiple mechanisms, the sampling tube and the front movable tube can be conveniently telescoped and rotated, facilitating carrying, storage, and the sampling bag. Both the front and rear ends of the sampling bag are provided with valves, and during sampling, the residual air in the sampling bag can be effectively discharged, making the amount of air in the sampled gas relatively less, and reducing the probability of errors in the corresponding data analysis of the sampled exhaust gas.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows:

[0006] The novel sampling pump device includes a sampling pump body, a sampling bag, a sampling tube, and a movable tube. It is characterized in that there are multiple sampling tubes. There is a threaded hole at the front side end of the volute of the sampling pump body, and the rear side end of the last sampling tube has an external thread. The rear sampling tube and the volute are installed together by threading. The multiple sampling tubes are distributed from front to back, and the rear end of the frontmost sampling tube is movably sleeved inside the last sampling tube. Sealing rubber sleeves are installed at the outer sides of the rear ends of the multiple sampling tubes in front of the rear sampling tube. There is a vent hole at each of the front side end of the frontmost sampling tube and the rear side end of the movable tube. A gas guide tube is installed in the vent hole of the frontmost sampling tube, and the outside of the gas guide tube has an external thread, while the vent hole of the movable tube has an internal thread. The movable tube and the gas guide tube are connected by threading. A branch pipe is installed at the lower end of the volute, and a fixing platform is installed at the lower end of the housing of the sampling pump body. Baffles are installed at both side ends of the fixing platform. There are multiple sampling bags, and valves are installed at the front and rear ends of each sampling bag respectively. The other end of the front valve has an air inlet pipe installed inside it. The sampling bags are placed inside the fixing platform, and the air inlet pipes of the sampling bags are connected to the branch pipe of the volute through hoses.

[0007] Preferably, the outer diameter of the sealing rubber sleeve is greater than the inner diameter of the sampling tube.

[0008] Preferably, the front side end of the frontmost sampling tube is of a closed structure, and the front side of the movable tube is of an open structure while the rear side is of a closed structure.

[0009] Preferably, a locking nut is screwed onto the outer side of the rear side end of the last sampling tube.

[0010] Preferably, the inside of the movable tube and the gas guide tube is in a communicating structure.

[0011] Preferably, a handle is installed at the upper end of the housing of the sampling pump body.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) The three sampling tubes of the present model can be pulled back and forth, thereby realizing the conversion of the lengths of the three sampling tubes, i.e., being longer or shorter. Moreover, the movable tube and the third sampling tube can rotate at an angle, which brings convenience to carrying, storage, and the sampling bag; (2) Since there are valves at both the front and rear ends of the sampling bag, before sampling, the valve at the rear end of the sampling bag can be opened, and after some sample gas enters, the valve can be closed. This can effectively discharge the residual air in the sampling bag, making the amount of air in the gas after sampling relatively less, and reducing the probability of errors in the corresponding data analysis of the waste gas after sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model when the movable tube is bent at a certain angle.

[0015] Figure 2 It is a schematic diagram of the overall structure of the present utility model when the movable tube is not bent.

[0016] Figure 3 It is a schematic diagram of the partial structure of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Figure 1 、 2As shown in Figs. 1 and 3, the new sampling pump device includes a sampling pump body 1 (220V, power 80W), a sampling bag 2, sampling tubes, and a movable tube 3. There are three sampling tubes (not limited to three). In the middle of the front side end of the volute 101 of the sampling pump body 1, there is a threaded hole. The rear side end of the third sampling tube 43 has an external thread. The rear end of the third sampling tube 43 is screwed into the internal thread of the threaded hole of the volute 101 through the external thread and is installed together with the front end of the volute. There are partition plates at the front side ends of the third sampling tube 43 and the second sampling tube 42, and there is a guiding hole 5 in the middle of the partition plate. The rear side ends of the first sampling tube 41 and the second sampling tube 42 are respectively slidably sleeved in the second sampling tube 42 and the third sampling tube 43. An annular hollow rubber sleeve 6 is adhesively bonded to the outer sides of the rear ends of the first sampling tube 41 and the second sampling tube 42. In the middle of the front left side end of the first sampling tube 41 and the middle of the rear right side end of the movable tube 3, there is a gas guiding hole 7 respectively. A gas guiding pipe 8 that communicates with its interior is welded in the gas guiding hole on the front left side of the first sampling tube. The outer side of the gas guiding pipe 8 has an external thread, and the gas guiding hole of the movable tube 3 has an internal thread. The movable tube 3 is screwed into the external thread of the gas guiding pipe 8 through the internal thread of the gas guiding hole to achieve the sealed connection between the two. A branch pipe 102 that communicates with its interior is welded to the lower middle part of the volute. A "└" - shaped fixing table 104 is welded to the lower end of the housing of the sampling pump body 1. Baffles 105 with heights lower than the lower end height of the housing of the sampling pump body are welded to the left and right side ends of the fixing table 104 (to prevent the sampling bag from falling off the fixing table 104). There are multiple sampling bags 2. A gas pipe that communicates with its interior is welded to the front and rear ends of each sampling bag 2 respectively. The front and rear gas pipes are respectively thread - connected to one end of a manual valve 21. An air inlet pipe 22 is installed inside the other end of the front - end manual valve 21 through internal thread. The sampling bag 2 is placed in the fixing table 104. The air inlet pipe 22 of the sampling bag is sleeved and connected to the branch pipe 102 of the volute through a flexible rubber tube 103 with a length margin.

[0018] Figure 1 、 2 、As shown in Figs. 1 and 3, the outer diameter of the rubber sleeve 6 is larger than the inner diameter of the guiding hole and is slightly larger than the inner diameter of the sampling tube 2 by 1 mm (the first sampling tube and the second sampling tube can move back and forth along the second and third sampling tubes respectively, and the rubber sleeve 6 can play a role in sealing between the outer side of the rear end of the front sampling tube and the inner side of the rear sampling tube). The front side end of the first sampling tube 41 is a closed structure. The front side of the movable tube 3 is an open structure and the rear side is a closed structure. A locking nut 106 is screwed onto the outer side of the rear side end of the third sampling tube 43. The movable tube 3 and the gas guiding pipe 8 are in an interconnected structure. A handle 107 (for convenient hand - holding) is welded to the upper end of the housing of the sampling pump body.

[0019] Figure 1 、 2As shown in FIGS. 1 and 3, the three sampling tubes of the present invention can be pulled back and forth, thereby realizing the conversion of the lengths of the three sampling tubes to be long or short, which brings convenience to carrying and storage; specifically, before carrying and storage, push the first and second sampling tubes backward by hand, so that the lengths of the three sampling tubes become shorter. Before sampling, pull the first and second sampling tubes forward by hand, so that the lengths of the three sampling tubes become longer. Before sampling, when the sampling personnel rotate the movable tube 3 clockwise or counterclockwise (rotate along the thread of the air guide tube), the angle of the movable tube 3 can be changed in the vertical direction. When loosening the locking nut 106 as needed and rotating the angle of the third sampling tube 43 clockwise or counterclockwise, the angle of the movable tube 3 can be changed in the horizontal direction. After the angle is in place, tighten the locking nut 106; through the above, the present invention can conveniently rotate and adjust the angle of the movable tube 3. When the sampling personnel stand on the ground and are lower than the height of the exhaust port of a certain device, they can conveniently align the front end of the movable tube with the inside of the exhaust port for sampling without the need to climb. The staff places a corresponding sampling bag 2 on the fixed table, and connects the intake pipe 22 of the sampling bag and the branch pipe 102 of the volute through a flexible rubber tube 103. The staff opens the valves 21 at the front end and the rear end of the sampling bag, and after turning on the power switch of the sampling pump body 1, the sampling pump body 1 is powered on and works. The impeller in its volute 101 generates negative pressure to draw the gas in the sampling area into the movable tube and the three sampling tubes, and then sends it into the sampling bag 2 through the exhaust pipe (branch pipe). After the gas enters the sampling bag, it is discharged from the rear valve 21. Then, the sampling personnel close the rear valve. After the gas collection amount in the sampling bag 2 is sufficient, the sampling personnel close the front valve 21 of the sampling bag. In this way, the gas in the sampling bag no longer discharges outward. Through the above, the present invention can effectively discharge the residual air in the sampling bag, making the air volume in the gas after sampling relatively less, and reducing the probability of errors in the corresponding data analysis of the waste gas after sampling. After sampling, the sampling personnel remove the flexible tube 103, and then the gas after sampling is subjected to physical and chemical analysis and other corresponding detection equipment in the detection room to obtain various gas data in the waste gas after sampling (connect the intake pipe 22 of the front valve of the sampling bag and the intake flexible tube of the detection equipment, and then the detection personnel squeeze the sampling bag by hand, and the gas in the sampling bag enters the detection chamber of the detection equipment, and the detection equipment detects the gas).

[0020] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0021] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel sampling pump device, comprising a sampling pump body, a sampling bag, a sampling tube, and a movable tube, characterized in that, There are multiple sampling tubes. There is a threaded hole at the front side end of the volute of the sampling pump body. The rear side end of the rear sampling tube has an external thread, and the rear sampling tube and the volute are installed together by threading. The multiple sampling tubes are distributed from front to back, and the rear end of the front sampling tube is movably sleeved inside the rear sampling tube. Sealing rubber sleeves are installed at the outer sides of the rear ends of the multiple sampling tubes at the front end of the rear sampling tube. There are air guide holes at one end of the front side of the frontmost sampling tube and at one end of the rear side of the movable tube. An air guide tube is installed in the air guide hole of the frontmost sampling tube. The outer side of the air guide tube has an external thread, and the air guide hole of the movable tube has an internal thread. The movable tube and the air guide tube are connected by threading. A branch pipe is installed at the lower end of the volute. A fixing table is installed at the lower end of the housing of the sampling pump body. Baffles are installed at the two side ends of the fixing table. There are multiple sampling bags. Valves are installed at the front and rear ends of each sampling bag respectively. An intake pipe is installed at the other end of the front valve. The sampling bags are placed in the fixing table, and the intake pipes of the sampling bags and the branch pipes of the volute are connected by hoses.

2. The novel sampling pump device according to claim 1, wherein, The outer diameter of the sealing rubber sleeve is larger than the inner diameter of the sampling tube.

3. The novel sampling pump device according to claim 1, characterized in that, The front side end of the frontmost sampling tube is of a closed structure, and the front side of the movable tube is open and the rear side is of a closed structure.

4. The novel sampling pump device according to claim 1, wherein, A locking nut is screwed onto the outer side of the rear side end of the rear sampling tube.

5. The novel sampling pump device according to claim 1, characterized in that, The inside of the movable tube and the air guide tube is in a communicating structure.

6. The novel sampling pump device according to claim 1, characterized in that, A handle is installed at the upper end of the housing of the sampling pump body.

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