Portable non-methane total hydrocarbon measuring device

Abstract

The invention discloses a portable non-methane total hydrocarbon measuring device which comprises a measuring device body, a filtering and heating unit and a sampling unit, the measuring device body is provided with a mounting groove, and the mounting groove is provided with a gas inlet connector; the sampling unit comprises a sampling tube, a handle, a connecting hose and a hose connector; the filtering and heating unit is connected with the gas inlet connector and the hose connector and used for dedusting and heating gas passing through the filtering and heating unit. According to the measuring device, the multiple filters can be used in turn, automatic replacement is achieved, human intervention is not needed, and the measuring efficiency is improved; when the filter needs to be replaced, automatic detection can be realized, so that a user can replace the filter in time, and the accuracy of a measurement result is ensured; according to the automatic blanking device, used filters can be automatically blanked, so that interference to measurement of a measuring device is avoided, and the used filters fall into a storage pipe to be collected.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and more specifically to a portable non-methane total hydrocarbon measuring device. Background Art

[0002] The non-methane total hydrocarbons measuring device can be used to monitor the non-methane total hydrocarbons content in the atmosphere to evaluate the air quality. Portable non-methane total hydrocarbons measuring devices are widely used in industrial production, exhaust gas monitoring, environmental monitoring, home environmental protection and other fields, and are of great significance for environmental protection and health risk assessment.

[0003] When the measuring device is measuring, some gases to be measured contain a lot of dust, which will affect the accuracy of the measurement. It is necessary to remove dust before measuring. However, for general measuring devices, the dust removal unit will gradually accumulate dust after being used for a period of time. The dust may adhere to the filter, pipe or other components, and the dust removal effect will deteriorate. In addition, it is troublesome to replace the dust removal unit. If it is not replaced, it will affect the accuracy of the measurement. In addition, during the measurement process, if the dust removal unit needs to be replaced, the measurement process will have to be interrupted. This will not only affect the measurement efficiency, but may also have an adverse effect on the measurement results. Summary of the invention

[0004] The present invention aims to overcome the defects of the prior art and provide a portable non-methane total hydrocarbon measuring device.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a total hydrocarbon measuring device, comprising a measuring device body, a filtering and heating unit and a sampling unit, the measuring device body having an installation groove, the installation groove having an air inlet interface; the sampling unit comprising a sampling tube, a handle installed at the sampling tube, a connecting hose connected to the end of the sampling tube, and a hose connector connected to the end of the connecting hose; the filtering and heating unit is connected to the air inlet interface and the hose connector, and is used to remove dust and heat the gas passing therethrough.

[0006] Furthermore, the measuring device body is a catalytic oxidation-FID measuring device.

[0007] In some embodiments, other types of measuring devices may also be used, as long as they can take in air through the sampling tube and achieve the measurement of total hydrocarbons.

[0008] Furthermore, a rotation drive unit, a finger cylinder and a detection seat are installed in the installation groove, and the rotation drive unit drives a turntable, and the turntable has a plurality of placement through holes distributed in a ring shape with equal intervals, and the placement through holes have a placement groove, and dust removal and filtering units are placed in the placement through holes except one placement through hole, and the dust removal and filtering unit includes a circular ring part and a filter plate fixedly installed on the circular ring part, and the circular ring part has a circular notch to divide the circular ring part into an outer circular ring part and an inner circular ring part; the air inlet interface is connected to a transmission pipe, and the transmission pipe is covered with a cover part, and a temperature sensor and a heating unit are installed in the cover part, and the end of the transmission pipe is connected to an L-shaped elbow, and the horizontal port of the L-shaped elbow has an end The end plate has a first through hole and a second through hole, the first through hole is connected to the transmission tube, the second through hole is connected to a transparent L-shaped test tube, one end of the L-shaped test tube is connected to the second through hole, and the other end is connected to the transmission tube, the detection seat has a first detection groove for allowing the L-shaped test tube to pass through, one end of the first detection groove is installed with a first light transmitter, and the other end is installed with a first light receiver; the two movable ends of the finger cylinder are respectively connected to an upper L-shaped rod and a lower L-shaped rod, the lower L-shaped rod is connected to a lower movable tube whose bottom end is inserted into the vertical port of the L-shaped bend tube, and the upper L-shaped rod is connected to an upper movable tube; the rotation drive unit can drive all the placement through holes at the turntable to pass between the upper movable tube and the lower movable tube in sequence.

[0009] Furthermore, the upper movable pipe and the hose connector are connected via threads.

[0010] Furthermore, there are 6 placement through holes.

[0011] Other quantities, such as 4 or 8, may also be selected as required.

[0012] Furthermore, the filter sheet is made of filter fiber material.

[0013] Furthermore, the lower movable tube includes a lower tube body and a lower sealing ring located at the top end of the lower tube body, and the lower sealing ring can abut the lower surface of the turntable; the upper movable tube includes an upper tube body and an upper sealing ring located at the bottom end of the upper tube body, and the upper sealing ring can abut the upper surface of the turntable.

[0014] Therefore, when the upper movable tube, the lower movable tube and the rotating disk cooperate with each other, better sealing performance is achieved.

[0015] Furthermore, the upper movable tube is connected to a driving block via a connecting arm, and an L-shaped storage tube is also installed at the installation groove. The driving block can press the dust removal and filtering unit in the placement groove above the vertical port of the storage tube, so that the inner circular ring portion falls off from the outer circular ring portion and falls into the storage tube; a fan unit is installed at the horizontal port of the storage tube.

[0016] Furthermore, a U-shaped slide is installed on the measuring device body, the U-shaped slide has a slide groove, a shielding unit is installed on the U-shaped slide, and a locking unit capable of locking the relative positions of the U-shaped slide and the shielding unit is installed on the U-shaped slide. The shielding unit includes two shielding plates and an end block connecting the two shielding plates, both sides of the end block have slide rails that cooperate with the slide groove, and the shielding plate has a circular through hole.

[0017] Furthermore, the locking unit is a locking bolt.

[0018] Furthermore, the driving block has a second detection groove, a second light emitter is installed on one side of the second detection groove, and a second light receiver is installed on the other side, and a pressure sensor is installed at the bottom end of the driving block.

[0019] Therefore, the second light transmitter and the second light receiver can be used to sense the dust condition at the vertical port of the storage tube, and the pressure sensor can be used to sense whether the used filter sheet has been successfully removed from the circular notch.

[0020] Furthermore, the filtering and heating unit can be in a working state and a loading state. In the working state, the placement through hole located above the storage tube is located between the circular through holes of the two baffles, and the placement through hole located above the lower movable tube is clamped by the upper movable tube and the lower movable tube. The first light emitter, the first light receiver, the second light emitter, and the second light receiver are all turned on, and the fan unit is started to make the storage tube discharge air from the horizontal port of the storage tube, and the finger cylinder is in a clamping state; in the loading state, the two baffles do not block all the placement through holes, the fan unit is closed, the finger cylinder is in a loosened state, and the upper movable tube and the lower movable tube are not in contact with the turntable.

[0021] Furthermore, the storage tube includes a vertical section, a horizontal section, and an arc section connecting the vertical section and the horizontal section; the horizontal section has a notch portion, an arc-shaped baffle is installed at the notch portion, the notch portion has a first side edge on both sides, the arc-shaped baffle has a second side edge on both sides, and the first side edge and the second side plate are fixedly connected by bolts.

[0022] This makes it easy to open the curved baffle and take out the used filter from the storage tube.

[0023] Furthermore, the sampling tube passes through the handle and is fixedly connected to the handle.

[0024] Thereby the handle is convenient for the operator to hold.

[0025] Furthermore, the measuring device body is hinged with a protective cover.

[0026] Thereby, the measuring device body is protected when not in use.

[0027] Furthermore, the measuring device body is provided with a touch screen and a printing unit.

[0028] This makes it easy to display and print the measurement results.

[0029] Furthermore, a raised handle is provided at the upper shielding plate.

[0030] Thereby, the sliding shielding unit is facilitated.

[0031] Beneficial effects:

[0032] 1. The measuring device of the present application can realize the use of multiple filters in turn and realize automatic replacement without human intervention, thereby improving the measurement efficiency.

[0033] 2. The measuring device of the present application can automatically detect when the filter needs to be replaced, so that the user can replace the filter in time to ensure the accuracy of the measurement results.

[0034] 3. The measuring device of the present application can automatically unload the used filter discs, thereby avoiding interference with the measurement of the measuring device, and the used filter discs fall into the storage tube for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the measuring device in normal use;

[0036] Figure 2 This is an enlarged view of area A;

[0037] Figure 3 Schematic diagram for replacing the next filter;

[0038] Figure 4 This is an enlarged view of area B;

[0039] Figure 5 This is an enlarged view of area C;

[0040] Figure 6 It is a schematic diagram under the loading state;

[0041] Figure 7 This is an enlarged view of area D.

[0042] For simplicity of view, Figure 3 , 6 The sampling unit is not shown.

[0043] Description of reference numerals: mounting groove 1.1; air inlet interface 1.2; protective cover 1.3; touch screen 1.4; printing unit 1.5; sampling tube 2.1; handle 2.2; connecting hose 2.3: hose connector 2.4; turntable 3; placement through hole 3.1; placement groove 3.2; finger cylinder 4; upper L-shaped rod 4.1; lower L-shaped rod 4.2; detection seat 5; first detection groove 5.1; dust removal filter unit 6; outer ring portion 6.1; inner ring portion 6.2; filter sheet 6.3; transmission Conveying pipe 7; L-shaped elbow 7.1; end plate 7.2; L-shaped test pipe 7.3; cover shell 7.4; lower movable pipe 8; lower pipe body 8.1; lower sealing ring 8.2; upper movable pipe 9; upper pipe body 9.1; upper sealing ring 9.2; connecting arm 9.3; driving block 9.4; second detection groove 9.4.1; storage pipe 10; fan unit 10.1; U-shaped slide 11; slide groove 11.1; locking unit 11.2; shielding plate 12; circular through hole 12.1; raised knob 12.2. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0045] The present invention provides a portable non-methane total hydrocarbon measuring device as shown in the figure, including a measuring device body, a filtering and heating unit and a sampling unit, the measuring device body has an installation groove 1.1, and the installation groove 1.1 has an air inlet interface 1.2; the sampling unit includes a sampling tube 2.1, a handle 2.2 installed at the sampling tube 2.1, a connecting hose 2.3 connected to the end of the sampling tube 2.1, and a hose connector 2.4 connected to the end of the connecting hose 2.3; the filtering and heating unit is connected to the air inlet interface 1.2 and the hose connector 2.4, and is used to remove dust and heat the gas passing therethrough. A rotary drive unit, a finger cylinder 4 and a detection seat 5 are installed in the installation groove 1.1, and the rotary drive unit drives a turntable 3. The turntable 3 has a plurality of placement through holes 3.1 distributed in a ring shape with equal intervals, and the placement through holes 3.1 have a placement groove 3.2. Except for one placement through hole 3.1, the remaining placement through holes 3.1 are all placed with a dust removal filter unit 6, and the dust removal filter unit 6 includes a circular ring portion and a filter plate 6.3 fixedly installed at the circular ring portion, and the circular ring portion has a circular notch to divide the circular ring portion into an outer circular ring portion 6.1 and an inner circular ring portion 6.2; the air inlet interface 1.2 is connected to a transmission pipe 7, and the transmission pipe 7 is covered with a cover portion 7.4, and a temperature sensor and a heating unit are installed in the cover portion 7.4, and the end of the transmission pipe 7 is connected to an L-shaped elbow 7.1, and the horizontal port of the L-shaped elbow 7.1 has an end Plate 7.2, the end plate 7.2 has a first through hole and a second through hole, the first through hole is connected to the transmission tube 7, the second through hole is connected to a transparent L-shaped test tube 7.3, one end of the L-shaped test tube 7.3 is connected to the second through hole, and the other end is connected to the transmission tube 7, the detection seat 5 has a first detection groove 5.1 for allowing the L-shaped test tube 7.3 to pass through, one end of the first detection groove 5.1 is installed with a first light transmitter, and the other end is installed with a first light receiver; the two movable ends of the finger cylinder 4 are respectively connected to an upper L-shaped rod 4.1 and a lower L-shaped rod 4.2, the lower L-shaped rod 4.2 is connected to a lower movable tube 8 whose bottom end is inserted into the vertical port of the L-shaped bent tube 7.1, and the upper L-shaped rod 4.1 is connected to an upper movable tube 9; the rotation drive unit can drive all the placement through holes 3.1 at the turntable 3 to pass between the upper movable tube 9 and the lower movable tube 8 in sequence.

[0046] The lower movable tube 8 includes a lower tube body 8.1 and a lower sealing ring 8.2 located at the top of the lower tube body 8.1, and the lower sealing ring 8.2 can abut against the lower surface of the turntable 3; the upper movable tube 9 includes an upper tube body 9.1 and an upper sealing ring 9.2 located at the bottom of the upper tube body 9.1, and the upper sealing ring 9.2 can abut against the upper surface of the turntable 3. The upper movable tube 9 is connected to a driving block 9.4 through a connecting arm 9.3, and an L-shaped receiving tube 10 is also installed at the installation groove 1.1, and the driving block 9.4 can press the dust removal filter unit 6 in the placement groove 3.2 above the vertical port of the receiving tube 10, so that the inner annular portion 6.2 falls off from the outer annular portion 6.1 and falls into the receiving tube 10; a fan unit 10.1 is installed at the horizontal port of the receiving tube 10; and a measuring device body is also installed. A U-shaped slide 11, the U-shaped slide 11 has a slide groove 11.1, a shielding unit is installed on the U-shaped slide 11, a locking unit 11.2 is installed on the U-shaped slide 11 to lock the relative position of the U-shaped slide 11 and the shielding unit, the shielding unit includes two shielding plates 12 and an end block connecting the two shielding plates 12, both sides of the end block have slide rails matching the slide groove 11.1, and the shielding plate 12 has a circular through hole 12.1; the driving block 9. 4 has a second detection groove 9.4.1, a second light emitter is installed on one side of the second detection groove 9.4.1, and a second light receiver is installed on the other side, and a pressure sensor is installed at the bottom end of the driving block 9.4; the filtering and heating unit can be in a working state and a loading state. In the working state, the placement through hole 3.1 located above the storage tube 10 is located between the circular through holes 12.1 of the two shielding plates 12, and the placement through hole 3.1 located above the lower movable tube 8 is clamped by the upper movable tube 9 and the lower movable tube 8, the first light emitter, the first light receiver, the second light emitter, and the second light receiver are all turned on, the fan unit 10.1 is started to make the storage tube discharge air from the horizontal port of the storage tube 10, and the finger cylinder 4 is in a clamping state; in the loading state, the two shielding plates 12 do not block all the placement through holes 3.1, the fan unit 10.1 is closed, the finger cylinder 4 is in a loose state, and the upper movable tube 9 and the lower movable tube 8 are not in contact with the turntable 3.

[0047] The storage tube 10 includes a vertical section, a horizontal section, and an arc section connecting the vertical section and the horizontal section; the horizontal section has a notch, an arc baffle is installed at the notch, the notch has first side edges on both sides, the arc baffle has second side edges on both sides, and the first side edge and the second side plate are fixedly connected by bolts. The sampling tube 2.1 passes through the handle 2.2 and is fixedly connected to the handle 2.2. The measuring device body is also hinged with a protective cover 1.3. The measuring device body is provided with a touch screen 1.4 and a printing unit 1.5.

[0048] Working principle: The measuring device of the present application is shown in the figure. The measured gas enters through the sampling tube and passes through the upper movable tube, the filter, the lower movable tube, and the transmission tube into the measuring device for measurement. The measured gas will be dusted by the filter before entering the measuring device, and will be heated by the heating unit, so that the measured gas after dust removal and heating is more conducive to improving the measurement accuracy.

[0049] like Figure 1 As shown, when working, the upper movable tube and the lower movable tube clamp one of the dust removal filter units to achieve dust removal (the other dust removal filter units are shielded by the shielding plate above and below, thereby protecting the dust removal filter units from being contaminated), and the measured gas will also pass through the L-shaped test tube when being transported by the delivery tube, so that the dust removal effect can be judged whether it meets the standard according to the measurement results of the first light generator and the first light receiver. If it is found that it does not meet the standard, the finger cylinder can be driven to open, and the rotary drive unit can be driven to rotate, so that the next dust removal filter unit is located between the upper movable tube and the lower movable tube, and the previously used dust removal filter unit will be located above the storage tube, and then the finger cylinder is clamped, and under the drive of the drive block, the inner ring part of the used dust removal filter unit breaks from the circular notch, so that it falls on the storage tube, and because the storage tube slowly exhausts air outward, the storage tube is in a negative pressure state, and the dust falling on the filter sheet in the storage tube will not have an adverse effect on the new filter sheet at the turntable above, or the measured gas transmitted through the upper movable tube and the lower movable tube. If the circular notch is not cleanly detached and the inner ring is still attached, it will touch the pressure sensor and be sensed, which can remind manual intervention. The dust on the attached filter will also affect the measurement signal of the second light transmitter and the second light receiver, which can also remind manual intervention to ensure that the used filter falls into the storage tube and the dust on the filter in the storage tube will not have an adverse effect on subsequent measurements.

[0050] After all filters have been used, Figure 6 As shown, the shielding unit is moved so that the dust filter unit is placed in the placement groove. When placing, the dust filter unit is not placed in one of the placement grooves to leave space for the driving block to prevent the unused filter sheet from being pressed down into the storage tube by the driving block. The arc baffle can be opened to remove the used filter sheet.

[0051] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A portable non-methane total hydrocarbon measuring device, characterized in that: It includes a measuring device body, a filtering and heating unit and a sampling unit. The measuring device body has an installation groove, and the installation groove has an air inlet interface; the sampling unit includes a sampling tube, a handle installed at the sampling tube, a connecting hose connected to the end of the sampling tube, and a hose connector connected to the end of the connecting hose; the filtering and heating unit is connected to the air inlet interface and the hose connector, and is used to remove dust and heat the gas passing therethrough.

2. The portable non-methane total hydrocarbon measuring device according to claim 1, characterized in that: A rotary drive unit, a finger cylinder and a detection seat are installed in the installation groove, and the rotary drive unit drives a turntable, and the turntable has a plurality of placement through holes distributed in a circular shape with equal intervals, and the placement through holes have a placement groove, and dust removal and filtering units are placed in the placement through holes except one placement through hole, and the dust removal and filtering unit includes a circular ring portion and a filter plate fixedly installed on the circular ring portion, and the circular ring portion has a circular notch to divide the circular ring portion into an outer circular ring portion and an inner circular ring portion; the air inlet interface is connected to a transmission pipe, and the transmission pipe is covered with a cover portion, and a temperature sensor and a heating unit are installed in the cover portion, and the end of the transmission pipe is connected to an L-shaped elbow, and the horizontal port of the L-shaped elbow has an end plate, The end plate is provided with a first through hole and a second through hole, the first through hole is connected to the transmission tube, the second through hole is connected to a transparent L-shaped test tube, one end of the L-shaped test tube is connected to the second through hole, and the other end is connected to the transmission tube, the detection seat has a first detection groove for allowing the L-shaped test tube to pass through, one end of the first detection groove is installed with a first light transmitter, and the other end is installed with a first light receiver; the two movable ends of the finger cylinder are respectively connected to an upper L-shaped rod and a lower L-shaped rod, the lower L-shaped rod is connected to a lower movable tube whose bottom end is inserted into the vertical port of the L-shaped bend tube, and the upper L-shaped rod is connected to an upper movable tube; the rotation drive unit can drive all the placement through holes at the turntable to pass between the upper movable tube and the lower movable tube in sequence.

3. The portable non-methane total hydrocarbon measuring device according to claim 2, characterized in that: The lower movable tube includes a lower tube body and a lower sealing ring located at the top end of the lower tube body, and the lower sealing ring can abut the lower surface of the turntable; the upper movable tube includes an upper tube body and an upper sealing ring located at the bottom end of the upper tube body, and the upper sealing ring can abut the upper surface of the turntable.

4. The portable non-methane total hydrocarbon measuring device according to claim 2, characterized in that: The upper movable tube is connected to a driving block through a connecting arm, and an L-shaped storage tube is also installed at the installation groove, and the driving block can press the dust removal filter unit in the placement groove above the vertical port of the storage tube, so that the inner circular ring part falls off from the outer circular ring part and falls into the storage tube; a fan unit is installed at the horizontal port of the storage tube; a U-shaped slide is also installed at the measuring device body, and the U-shaped slide has a slide groove, and a shielding unit is installed at the U-shaped slide, and a locking unit capable of locking the relative positions of the U-shaped slide and the shielding unit is installed at the U-shaped slide, and the shielding unit includes two shielding plates and an end block connecting the two shielding plates, and both sides of the end block have slide rails that cooperate with the slide groove, and the shielding plate has a circular through hole; the driving block has a second detection groove , a second light emitter is installed on one side of the second detection groove, and a second light receiver is installed on the other side, and a pressure sensor is installed on the bottom end of the driving block; the filtering and heating unit can be in a working state and a loading state, in the working state, the placement through hole located above the storage tube is located between the circular through holes of the two shielding plates, and the placement through hole located above the lower movable tube is clamped by the upper movable tube and the lower movable tube, the first light emitter, the first light receiver, the second light emitter, and the second light receiver are all turned on, the fan unit is started so that the storage tube discharges air from the horizontal port of the storage tube, and the finger cylinder is in a clamping state; in the loading state, the two shielding plates do not block all the placement through holes, the fan unit is closed, the finger cylinder is in a loosened state, and the upper movable tube and the lower movable tube are not in contact with the turntable.

5. The portable non-methane total hydrocarbon measuring device according to claim 4, characterized in that: The storage tube includes a vertical section, a horizontal section and an arc section connecting the vertical section and the horizontal section; the horizontal section has a notch portion, an arc-shaped baffle is installed at the notch portion, the notch portion has a first side edge on both sides, the arc-shaped baffle has a second side edge on both sides, and the first side edge and the second side plate are fixedly connected by bolts.

6. The portable non-methane total hydrocarbon measuring device according to claim 4, characterized in that: The sampling tube passes through the handle and is fixedly connected to the handle.

7. The portable non-methane total hydrocarbon measuring device according to claim 4, characterized in that: The measuring device body is also hinged with a protective cover.

8. The portable non-methane total hydrocarbon measuring device according to claim 4, characterized in that: The measuring device body is provided with a touch screen and a printing unit.

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