Volatile organic compound detection and collection device

Abstract

The utility model relates to the field of volatile organic compound detection, and discloses a volatile organic compound detection and collection device which comprises a sampling box, an air inlet pipe is mounted on one side of the sampling box, a collection mechanism is mounted at the top of the sampling box, a height adjusting mechanism is mounted at the top of the air inlet pipe, and the collection mechanism comprises a collection barrel and a screw hole. The screw hole is formed in the center of the top of the sampling box, an exhaust valve is installed outside the screw hole, a communicating valve is installed at the bottom of the collecting barrel, a guide rod is movably installed in the collecting barrel, and a rotary knob is fixedly installed at the top end of the guide rod. Through sliding of the piston, redundant gas can be exhausted before collection, gas collection, taking and placing are facilitated, volatile organic compound gas is fully collected in the collection barrel, and the sealing performance and fixation of the piston connecting position are improved; and through the lifting rod and the gas collecting hood, the collection height can be adjusted conveniently, and gas at the designated position can be collected.

Description

TECHNICAL FIELD

[0001] The utility model relates to volatile organic compound detection field, concretely is a kind of volatile organic compound detection collection device. BACKGROUND

[0002] Volatile organic compound refers to the organic compound that can participate in atmospheric photochemical reaction, such as methane, ethane, benzene, ethylene etc., in production and processing process, in order to reduce the pollution to atmosphere, need to be collected at discharge, to detect the content of volatile organic compound gas.

[0003] The utility model discloses a volatile organic compound detection sampling device discloses a volatile organic compound detection sampling device, including volatile organic compound detection sampling device main part, the inside of volatile organic compound detection sampling device main part is provided with anti-volatilization sealed collection subassembly.

[0004] The above-mentioned sampling device can effectively collect volatile organic compounds and prevent backflow, but during the collection process, due to the residual gas in the gas inlet pipe, these gases are easily collected into the collection cylinder, affecting the subsequent detection accuracy, and the volatile organic compounds are different from the air seal, and it is not convenient to adjust the collection at different heights. UTILITY MODEL CONTENTS

[0005] The utility model discloses a volatile organic compound detection collection device to solve the technical problem in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A volatile organic compound detection collection device, including sampling box, the side of sampling box is installed with air inlet pipe, the top of sampling box is installed with collection mechanism, the top of air inlet pipe is installed with height adjustment mechanism, the collection mechanism includes collection cylinder and screw hole, the screw hole is installed in the top of sampling box and is in the middle position, the outside of screw hole is installed with exhaust valve, the bottom of collection cylinder is installed with communication valve, the inside of collection cylinder is movably installed with guide rod, the top of guide rod is fixedly installed with knob, the inner wall of collection cylinder is provided with four guide rails, the outside of guide rod and in the inside of collection cylinder movably installs piston, the top of piston is installed with spring, the outside of collection cylinder is opened with a plurality of exhaust holes near top end, the top of piston is provided with sealing ring near outer ring, the top of piston is provided with connecting groove in the middle, the inside of collection cylinder is opened with sealing groove near top end, the outside of guide rod is fixedly installed with connecting disc near top end.

[0008] Preferably, the bottom end of the communication valve is threadedly connected with the screw hole, and the piston is located in the inside of the collection cylinder and is guided and slidably arranged through the guide rail.

[0009] Preferably, the inner and outer diameters of the sealing ring match the inner and outer diameters of the sealing groove, and the sealing ring and the sealing groove are interlocked.

[0010] Preferably, the guide rod is located inside the collecting cylinder and is rotatably arranged, and the bottom of the connecting plate is threadedly connected to the connecting groove.

[0011] Preferably, the height adjustment mechanism includes a fixed column and a telescopic tube. The telescopic tube is connected to the top of the air inlet pipe. The fixed column is fixedly installed on the top side of the sampling box. A lifting rod is movably installed inside the fixed column. A screw is installed at the top of the output shaft of the motor inside the sampling box. A top plate is fixedly installed between the top of the lifting rod and the top of the telescopic tube. An air collection hood is installed on the top of the telescopic tube.

[0012] Preferably, the cross-sections of the fixed column and the lifting rod are both rectangular, and the air collection hood is interconnected with the air inlet pipe through a telescopic pipe.

[0013] Preferably, the screw is threaded through the inside of the lifting rod, and the lifting rod is located inside the fixed column and is slidably positioned up and down.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) This collection device, by setting up a collection mechanism, connects the connecting valve to the screw hole threaded connection, and the piston slides up and down in the collection cylinder. By alternately opening and closing the connecting valve and the exhaust valve, excess gas can be discharged before collection, which facilitates the collection and release of gas. Through the snap-fit ​​of the sealing ring and the sealing groove, and the connection of the connecting plate and the connecting groove, the piston slides down automatically under the action of the spring, which can fully collect volatile organic compounds in the collection cylinder, improve the sealing and fixation of the piston connection, and automatically discharge the internal gas during the next collection.

[0016] 2) This collection device, by setting a height adjustment mechanism, uses the rotation of the screw to drive the lifting rod to slide up and down, so that the top plate and the gas collection hood follow the rise and fall, which facilitates the adjustment of the collection height and the collection of gas at a designated location. Through the connection of the telescopic pipe, the gas collection hood is always connected to the air inlet pipe when it is raised and lowered. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a volatile organic compound detection and collection device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the collecting mechanism in an embodiment of this utility model;

[0019] Figure 3 As an embodiment of this utility model Figure 2 Enlarged view of the structure at point A;

[0020] Figure 4 It is the structural schematic view of the height adjusting mechanism in the embodiment of the utility model.

[0021] In the drawing: 1, sampling box; 2, air inlet pipe; 3, collection mechanism; 4, height adjusting mechanism; 5, collection cylinder; 6, screw hole; 7, exhaust valve; 8, communication valve; 9, guide rod; 10, knob; 11, guide rail; 12, piston; 13, spring; 14, exhaust hole; 15, sealing ring; 16, connecting groove; 17, sealing groove; 18, connecting disc; 19, fixed column; 20, telescopic pipe; 21, lifting rod; 22, screw rod; 23, top plate; 24, gas collecting cover. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] Embodiment one

[0024] Combined with Figures 1-4 , a volatile organic compound detection and collection device, including sampling box 1, sampling box 1 one side is installed with air inlet pipe 2, sampling box 1 top is installed with collection mechanism 3, air inlet pipe 2 top is installed with height adjusting mechanism 4.

[0025] Referring to Figure 2 and Figure 3 , further obtained, collection mechanism 3 includes collection cylinder 5 and screw hole 6, screw hole 6 is installed in the top center position of sampling box 1, the outside of screw hole 6 is installed with exhaust valve 7, the bottom of collection cylinder 5 is installed with communication valve 8, the inside of collection cylinder 5 is movably installed with guide rod 9, the top end of guide rod 9 is fixedly installed with knob 10, the inner wall of collection cylinder 5 is provided with four guide rails 11, the outside of guide rod 9 and inside collection cylinder 5 are movably installed with piston 12, the top of piston 12 is installed with spring 13, the outside of collection cylinder 5 near the top end is provided with a plurality of exhaust holes 14, the top of piston 12 near the outer ring is provided with sealing ring 15, the top of piston 12 is centrally provided with connecting groove 16, the inside of collection cylinder 5 near the top end is provided with sealing groove 17, the outside of guide rod 9 near the top end is fixedly installed with connecting disc 18, the inside of sampling box 1 is respectively provided with air pump and motor, the air inlet and outlet of air pump are connected with air inlet pipe 2 and screw hole 6 respectively.

[0026] The bottom end of the communication valve 8 is in threaded connection with the screw hole 6, the piston 12 is in guided sliding with the guide rail 11 in the interior of the collecting cylinder 5, the communication valve 8 is used for opening and closing the collecting cylinder 5.

[0027] The inner and outer diameters of the sealing ring 15 match the inner and outer diameters of the sealing groove 17, the sealing ring 15 is in clamping connection with the sealing groove 17, the sealing ring 15 and the sealing groove 17 enhance the sealing between the piston 12 and the interior of the collecting cylinder 5.

[0028] The guide rod 9 is in active rotation in the interior of the collecting cylinder 5, the bottom of the connecting disc 18 is in threaded connection with the connecting groove 16, the connecting disc 18 is used for sealing the connecting gap between the piston 12 and the guide rod 9, and the piston 12 is fixed.

[0029] Specifically, the air in the air suction pump and the air inlet pipe 2 is discharged by opening and closing the exhaust valve 7, the volatile organic gas is collected in the collecting cylinder 5 and sealed by opening and closing the communication valve 8, the gas enters the collecting cylinder 5 and makes the piston 12 automatically slide upward under the action of pressure, the sealing ring 15 is clamped into the sealing groove 17, the connecting disc 18 and the connecting groove 16 fix the piston 12, and the sealing of the connecting part between the piston 12 and the collecting cylinder 5 is improved.

[0030] Example two

[0031] Referring to Figure 4 On the basis of example one, it is further obtained that the height adjusting mechanism 4 includes a fixed column 19 and a telescopic pipe 20, the telescopic pipe 20 is connected to the top end of the air inlet pipe 2, the fixed column 19 is fixedly installed on the top of the sampling box 1 on one side, a lifting rod 21 is movably installed in the interior of the fixed column 19, a screw rod 22 is installed at the top end of the output shaft of the motor in the interior of the sampling box 1, a top plate 23 is fixedly installed between the top end of the telescopic pipe 20 and the exterior of the telescopic pipe 20 on one side, and a gas collecting cover 24 is installed on the top of the telescopic pipe 20.

[0032] The fixed column 19 and the lifting rod 21 are both in rectangular cross section, the gas collecting cover 24 is communicated between the telescopic pipe 20 and the air inlet pipe 2, the external volatile organic gas is sucked into the interior of the sampling box 1, and is collected at a specified position through the gas collecting cover 24.

[0033] The screw rod 22 is in threaded connection in the interior of the lifting rod 21, the lifting rod 21 is in up-down sliding in the interior of the fixed column 19, the lifting rod 21 is in threaded up-down sliding through the screw rod 22, and the height of the gas collecting cover 24 is changed.

[0034] Specifically, the screw rod 22 is rotated by the motor in the interior of the sampling box 1, the lifting rod 21 drives the gas collecting cover 24 to ascend and descend under the action of threads, the height of the gas collecting cover 24 is adjusted, and collection at different heights is carried out.

[0035] In actual operation, the suction pump and the motor in the sampling box 1 are respectively used for suction of volatile organic gas and adjustment of the height of the lifting rod 21, and the volatile organic gas is collected through the collecting cylinder 5 for subsequent detection.

[0036] When collecting, the communication valve 8 at the bottom end of the collecting cylinder 5 is connected with the screw hole 6, the communication valve 8 is closed, the exhaust valve 7 is opened, and the air in the suction pump and the air inlet pipe 2 is exhausted through the exhaust valve 7; after the air is exhausted, the exhaust valve 7 is closed and the communication valve 8 is opened, the gas enters the collecting cylinder 5 and pushes the piston 12 upward under the action of pressure, the piston 12 slides to the top end, the communication valve 8 is closed and the collection is stopped, the guide rod 9 is rotated and connected with the connecting groove 16 by rotating the knob 10 to make the connecting disc 18 rotate and be connected with the connecting groove 16, the sealing ring 15 is clamped into the sealing groove 17, the connecting disc 18 seals the gap between the piston 12 and the guide rod 9, and then the piston 12 is fixed, so that the volatile organic gas is completely collected in the collecting cylinder 5;

[0037] When collecting at different height positions, the motor in the sampling box 1 drives the screw rod 22 to rotate, the lifting rod 21 slides up and down through the screw thread, and the gas collecting cover 24 is driven to follow the lifting, the gas collecting cover 24 is connected with the air inlet pipe 2 through the extension and contraction of the extension pipe 20, and the specified height is collected through the lifting of the gas collecting cover 24.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A volatile organic compound detection and collection device comprising a sampling box (1), one side of the sampling box (1) being provided with an air inlet pipe (2), characterized in that: The top of the sampling box (1) is provided with a collecting mechanism (3), and the top of the air inlet pipe (2) is provided with a height adjusting mechanism (4); The collecting mechanism (3) comprises a collecting cylinder (5) and a threaded hole (6), the threaded hole (6) is arranged at the top of the sampling box (1) in a central position, an exhaust valve (7) is arranged outside the threaded hole (6), a communication valve (8) is arranged at the bottom of the collecting cylinder (5), a guide rod (9) is movably arranged in the collecting cylinder (5), a knob (10) is fixedly arranged at the top end of the guide rod (9), four guide rails (11) are arranged on the inner wall of the collecting cylinder (5), a piston (12) is movably arranged outside the guide rod (9) and in the collecting cylinder (5), a spring (13) is arranged at the top of the piston (12), a plurality of exhaust holes (14) are arranged at the top of the collecting cylinder (5), a sealing ring (15) is arranged at the top of the piston (12) and outside the piston (12), a connecting groove (16) is arranged at the top of the piston (12) and in a central position, a sealing groove (17) is arranged at the top of the collecting cylinder (5) and in a central position, and a connecting disc (18) is fixedly arranged at the top end of the guide rod (9) and outside the guide rod (9).

2. The volatile organic compound detection and collection device of claim 1, wherein: The bottom end of the communication valve (8) is in threaded connection with the threaded hole (6), and the piston (12) is in guided sliding in the collecting cylinder (5) through the guide rails (11).

3. The volatile organic compound detection and collection device of claim 1, wherein: The inner and outer diameters of the sealing ring (15) are matched with the inner and outer diameters of the sealing groove (17), and the sealing ring (15) is in clamping connection with the sealing groove (17).

4. The volatile organic compound detection and collection device of claim 1, wherein: The guide rod (9) is movably arranged in the collecting cylinder (5) and is rotatable, and the bottom of the connecting disc (18) is in threaded connection with the connecting groove (16).

5. The volatile organic compound detection and collection device of claim 1, wherein: The height adjusting mechanism (4) comprises a fixed column (19) and a telescopic pipe (20), the telescopic pipe (20) is connected to the top end of the air inlet pipe (2), the fixed column (19) is fixedly arranged at the top of the sampling box (1) and on one side, a lifting rod (21) is movably arranged in the fixed column (19), a screw rod (22) is arranged at the top end of the output shaft of the motor in the sampling box (1), a top plate (23) is fixedly arranged between the top end of the lifting rod (21) and the top end of the telescopic pipe (20) outside the telescopic pipe (20), and a gas collecting cover (24) is arranged at the top of the telescopic pipe (20).

6. The volatile organic compound detection and collection device of claim 5, wherein: The fixed column (19) and the lifting rod (21) are both rectangular in cross section, and the gas collecting cover (24) is in communication between the telescopic pipe (20) and the air inlet pipe (2).

7. The volatile organic compound detection and collection device of claim 5, wherein: The screw rod (22) is in threaded connection in the fixed column (19), and the lifting rod (21) is in up-down sliding in the fixed column (19).

Images