Sampling device for measuring iron-containing waste hydrochloric acid

Abstract

The utility model discloses a sampling device for measuring iron-containing waste hydrochloric acid. The sampling device comprises a sampling tube, a valve rod, a valve rod supporting block and two valve cores, the sampling tube is a hollow tube body, the lower end and the middle part of the sampling tube are respectively provided with sampling holes with a 180-degree circumferential difference, and a sample bin is correspondingly formed in the sampling tube; the valve rod is in sliding fit in the sampling pipe; the two valve elements are fixed to the valve rod, and when the valve rod slides to the first station, the valve elements seal the sampling hole, and when the valve rod slides to the second station, the sampling hole is opened. According to the utility model, through the double sampling holes and the linkage valve core structure, samples with different depths can be synchronously obtained through one-time operation, and interlayer pollution is avoided; the reverse extension design of the operating handle is matched with the depth gauge to realize stable and accurate control of two hands, and the working efficiency is improved; the composite structure of the stainless steel substrate and the polytetrafluoroethylene coating is resistant to hydrochloric acid corrosion; the sectional type pipe body design is convenient to disassemble and maintain, and the inclination angle design of the flow guide funnel ensures smooth sampling of high-solid-content liquid and reduces residues.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste acid recovery treatment technical field, concretely relates to a sampling device for iron-containing waste hydrochloric acid determination. BACKGROUND

[0002] In the composition detection of the iron-containing waste hydrochloric acid in the oil tank truck transportation, the traditional sampling method usually adopts single sampler to insert different depths for collection in batches, and has the following defects: (1) the sampling rod needs to be inserted for many times, the sampling efficiency is low, the operation time is long, and it is difficult to operate repeatedly when the internal space of the oil tank truck is narrow; (2) when sampling many times, the upper layer waste acid may pollute the lower layer sample due to adhesion or dripping when the sampling rod is pulled out, and the risk of cross contamination between layers is large; (3) the layered sampling device depends on the sample of different liquid layers extracted in steps, and the consistency of the waste acid state at different depths at the same time point cannot be guaranteed, the synchronization is insufficient, and the detection result deviation is caused; (4) part of the multi-channel sampling device adopts independent pipeline design, which leads to complex structure and poor portability.

[0003] Therefore, a sampling device with compact structure, which can synchronously obtain samples at different depths in single operation and avoid layer interference, is particularly suitable for limited scenes such as oil tank trucks. UTILITARY MODEL

[0004] In order to realize simultaneous sampling of iron-containing waste hydrochloric acid at different depths in single operation, the utility model provides a sampling device for iron-containing waste hydrochloric acid determination.

[0005] The technical scheme adopted by the utility model is as follows: a sampling device for iron-containing waste hydrochloric acid determination, comprising a sampling pipe, a valve rod, a valve rod support block and two valve cores; the sampling pipe is a hollow pipe body, and a sampling hole is arranged at the lower end and the middle part of the pipe body respectively, the two sampling holes are distributed at an angle of 180° along the circumference of the pipe body, and the positions corresponding to the two sampling holes in the sampling pipe form a sample bin; the valve rod is in sliding fit with the sampling pipe; the valve rod support block is fixed inside the sampling pipe, a through hole is formed in the middle part of the valve rod support block, and the valve rod is sealingly and slidably assembled in the through hole; the two valve cores are fixed on the valve rod, and the two valve cores correspond to the positions of the two sample bins respectively; when the valve rod slides to the first station, the valve core is inserted into the sample bin to close the sampling hole; when the valve rod slides to the second station, the valve core is separated from the sample bin to open the sampling hole.

[0006] Preferably, the sampling hole is arranged at the central position of the axial direction of the sample bin, or at the lower segment position close to the bottom of the sample bin.

[0007] Preferably, the outer side of the sampling hole is provided with a flow guide funnel which is outwardly flared, and the axis of the flow guide funnel and the axial direction of the sampling pipe form an angle of 30-60°.

[0008] Preferably, the upper end of the valve rod extends out of the sampling tube, the upper end of the sampling tube is provided with a first operating handle, the upper end of the valve rod is provided with a second operating handle, and the first operating handle and the second operating handle extend horizontally in opposite directions, respectively.

[0009] Preferably, the sampling tube and the valve rod are made of a 316L stainless steel base, and the outer surface is coated with a polytetrafluoroethylene corrosion-resistant coating with a thickness of 0.1-0.3mm.

[0010] Preferably, the inner wall of the through hole is provided with a first annular sealing groove, and a first sealing ring made of fluororubber is embedded in the first annular sealing groove, and the inner diameter of the first sealing ring is 0.2-0.5mm smaller than the outer diameter of the valve rod.

[0011] Preferably, the lower surface of the upper valve core and the upper surface of one of the valve rod support blocks form a sample bin, and the lower surface of the lower valve core and the bottom plate of the sampling tube form another sample bin.

[0012] Preferably, the sampling tube is a two-segment combined structure formed by connecting an upper tube body and a lower tube body, and the two sample bins are located at the lower end of the upper tube body and the lower end of the lower tube body, respectively.

[0013] Preferably, the outer wall of the valve core is provided with a second annular sealing groove, and a second sealing ring made of fluororubber is embedded in the second annular sealing groove, and the outer diameter of the second sealing ring is 0.3-0.8mm larger than the inner diameter of the sample bin.

[0014] Preferably, the outer wall of the tube body of the sampling tube is provided with a depth scale with a zero point at the lower end.

[0015] The utility model has the following beneficial effects:

[0016] 1. Synchronous stratified sampling and cross-contamination prevention: through the sampling holes at the lower end and the middle of the sampling tube, which are distributed at 180°, and the corresponding sample bins, combined with the double-valve-core opening and closing mechanism controlled by the valve rod linkage, different depth waste hydrochloric acid samples can be obtained synchronously through single insertion operation, avoiding the interlayer liquid adhesion pollution caused by multiple sampling in the traditional method.

[0017] 2. Operation efficiency and portability: the first operating handle and the second operating handle are designed to extend in opposite directions, and the sliding station of the valve rod is switched, so that the synchronous opening and closing control of the sampling holes can be stably completed by two hands, and the precise depth positioning of the sampling holes can be realized by cooperating with the depth scale on the outer wall of the tube body, thereby shortening the sampling time, and the utility model is especially suitable for efficient operation in the narrow space of an oil tank truck.

[0018] 3. Corrosion resistance: 316L stainless steel base with 0.1-0.3mm polytetrafluoroethylene coating, resistant to corrosion of hydrochloric acid with a concentration of 20% or more, no coating peeling after 500 hours of continuous use at 60℃, 5-8 times longer than ordinary carbon steel;

[0019] 4. Processing and maintenance performance: two-section design of upper and lower tube bodies, easy to manufacture, supporting quick disassembly and cleaning or replacing damaged parts;

[0020] 5. Flow guiding and residual liquid prevention: 30-60° inclined flow guide funnel expands the liquid inflow cross-sectional area, ensuring smooth sampling of high solid content waste hydrochloric acid, while avoiding residual liquid in the sampling tube. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a cross-sectional view of an embodiment of the present utility model (the valve rod is in the first station).

[0022] Figure 2 is a cross-sectional view of an embodiment of the present utility model (the valve rod is in the second station).

[0023] Figure 3 is an enlarged view of position A in an embodiment of the present utility model.

[0024] Figure 4 is a cross-sectional view of the valve rod support block in an embodiment of the present utility model.

[0025] Figure 5 is an enlarged view of position B in an embodiment of the present utility model.

[0026] Figure 6 is a cross-sectional view of the valve core in an embodiment of the present utility model.

[0027] Sampling tube 1, sampling hole 11, sample bin 12, flow guide funnel 13, upper tube body 14, lower tube body 15;

[0028] Valve rod 2;

[0029] Valve rod support block 3, through hole 31, first annular sealing groove 32;

[0030] Valve core 4, second annular sealing groove 41;

[0031] First operating handle 5;

[0032] Second operating handle 6;

[0033] First sealing ring 7;

[0034] Second sealing ring 8. DETAILED DESCRIPTION

[0035] The utility model will be further described below in combination with the embodiments and drawings.

[0036] In the embodiment, as shown in the figure, Figures 1-6 A sampling device for measuring waste hydrochloric acid containing iron includes a sampling tube 1, which is a hollow tube body, and a sampling hole 11 is arranged at the lower end and the middle part of the sampling tube 1 respectively. The two sampling holes 11 are distributed at an angle of 180° along the circumference of the tube body of the sampling tube 1, and the positions corresponding to the two sampling holes 11 in the sampling tube 1 form a sample bin 12. A valve rod 2 is in sliding fit with the sampling tube 1. A valve rod support block 3 is fixed inside the sampling tube 1, and a through hole 31 is formed in the middle part of the valve rod support block 3. The valve rod 2 is sealingly and slidably assembled in the through hole 31. Two valve cores 4 are fixed on the valve rod 2, and the two valve cores 4 correspond to the positions of the two sample bins 12 respectively. When the valve rod 2 is slid to a first working position, the valve core 4 is inserted into the sample bin 12 to close the sampling hole 11. When the valve rod 2 is slid to a second working position, the valve core 4 is separated from the sample bin 12 to open the sampling hole 11. In this embodiment, through the design of double sampling holes and the linkage control of valve cores, different depth samples can be obtained synchronously in a single operation, cross-contamination between layers is avoided, the sampling efficiency and the accuracy of detection results are significantly improved, and the device is especially suitable for narrow space scenes such as tank trucks.

[0037] In the embodiment, as shown in the figure, Figures 1-2 The sampling hole 11 is arranged at the central position in the axial direction of the sample bin 12, or near the lower segment position of the bottom of the sample bin 12. This structural design is used to ensure that when the sample in one sample bin 12 is poured out, the sample in the other sample bin 12 will not flow out, thereby ensuring the reliability and safety of the sampling operation.

[0038] In the embodiment, as shown in the figure, Figures 1-2 The outer side of the sampling hole 11 is provided with a outwardly flared flow guide funnel 13, and the axis of the flow guide funnel 13 forms an angle of 30-60° with the axial direction of the sampling tube 1. The flow guide funnel 13 enlarges the liquid inflow cross-sectional area, ensures smooth sampling of high solid content waste hydrochloric acid, and avoids residual liquid in the sampling tube.

[0039] In the embodiment, as shown in the figure, Figures 1-2 The upper end of the valve rod 2 extends out of the sampling tube 1, the upper end of the sampling tube 1 is provided with a first operation handle 5, the upper end of the valve rod 2 is provided with a second operation handle 6, and the first operation handle 5 and the second operation handle 6 extend in opposite directions respectively. The reverse handle design enables the operator to stably operate with both hands, completes the working position switching of the valve rod, significantly improves the operation convenience, and realizes accurate control of the sampling depth in cooperation with the depth ruler.

[0040] In the embodiment, the material of the sampling tube 1 and the valve stem 2 is 316L stainless steel, and the outer surface is coated with a polytetrafluoroethylene corrosion-resistant coating with a thickness of 0.1-0.3 mm. The composite structure makes the device resistant to corrosion by hydrochloric acid with a concentration of 20% or more, and the service life is 5-8 times longer than that of ordinary materials at 60°C. The coating has strong adhesion to the substrate and does not peel off after 500 hours of continuous use.

[0041] In the embodiment, as shown in Figures 3-4 The inner wall of the through hole 31 is provided with a first annular sealing groove 32, and the first annular sealing groove 32 is embedded with a first sealing ring 7 made of fluororubber. The inner diameter of the first sealing ring 7 is 0.2-0.5 mm smaller than the outer diameter of the valve stem 2. The interference fit design forms a reliable dynamic seal to prevent waste acid from leaking along the gap between the valve stem and the through hole.

[0042] In the embodiment, as shown in Figures 1-2 The lower surface of the upper valve core 4 and the upper surface of a valve stem support block 3 form a sample chamber 12, and the lower surface of the lower valve core 4 and the bottom plate of the sampling tube 1 form another sample chamber 12. This structure forms an independent sealed cavity through the cooperation of the valve core and the support block and the bottom plate, ensuring that the upper and lower samples are isolated during sampling.

[0043] In the embodiment, as shown in Figures 1-3 The sampling tube 1 is a two-section combined structure composed of an upper tube body 14 and a lower tube body 15, and the two sample chambers 12 are located at the lower end of the upper tube body 14 and the lower end of the lower tube body 15. The upper tube body 14 and the lower tube body 15 can be connected in a detachable manner using threads, flanges, quick connectors, etc. This design facilitates the production and assembly of the device, and also facilitates disassembly and cleaning, reducing maintenance costs.

[0044] In the embodiment, as shown in Figures 5-6 The outer wall of the valve core 4 is provided with a second annular sealing groove 41, and the second annular sealing groove 41 is embedded with a second sealing ring 8 made of fluororubber. The outer diameter of the second sealing ring 8 is 0.3-0.8 mm larger than the inner diameter of the sample chamber 12. This sealing structure produces radial compression deformation when the valve core is closed, forming a bidirectional sealing barrier that effectively prevents liquid leakage in the sample chamber 12.

[0045] In the embodiment, the outer wall of the tube body of the sampling tube 1 is provided with a depth gauge with a zero point at the lower end. The scale markings allow the operator to accurately control the insertion depth of the sampling tube, ensuring accurate sampling position of different liquid layers and meeting the positioning requirements of laboratory-level testing.

[0046] In the embodiment, the operation steps of the sampling device for determining iron-containing waste hydrochloric acid are as follows:

[0047] (1) Device pre-check and preparation:

[0048] Clean the surface of the diversion funnel 13 and the sampling hole 11 with soft cloth; hold the first operating handle 5 with the left hand, and push and pull the second operating handle 6 with the right hand, test whether the valve rod 2 slides smoothly, and observe the opening and closing state of the valve core 4 and the sample bin 12.

[0049] (2) Sampling tube positioning:

[0050] Adjust the valve rod 2 to the first station by operating the first operating handle 5 and the second operating handle 6 with both hands; hold vertically, and slowly insert the sampling tube 1 into the waste acid liquid surface; determine the insertion depth through the depth scale on the outer wall of the tube body, so that the lower end sampling hole 11 penetrates into the bottom layer liquid area to the target liquid layer.

[0051] (3) Open the sampling:

[0052] Adjust the valve rod 2 to the second station by holding the first operating handle 5 with the left hand and pulling the second operating handle 6 with the right hand, the valve rod 2 moves upward, and the two valve cores 4 are synchronously separated from the sample bin 12, and the two sampling holes 11 are opened; keep the device stationary for 10-15 seconds, and the waste acid flows into the upper and lower sample bins 12 through the sampling holes 11; slowly and vertically take out the sampling tube 1 to avoid shaking.

[0053] (4) Sample recovery:

[0054] Align the diversion funnel 13 at the lower end of the sampling tube 1 with the collection container, and tilt and pour, under the action of gravity, the waste acid in the lower end sample bin 12 is discharged into the container, and is emptied as much as possible; align the diversion funnel 13 at the middle of the sampling tube 1 with another collection container, and tilt and pour, under the action of gravity, the waste acid in the middle sample bin 12 is discharged into the container and is emptied as much as possible; the sampling is completed.

[0055] (5) Maintenance and preservation:

[0056] After washing and drying the sampling device, adjust the valve rod 2 to the first station, and perform preservation.

[0057] Obviously, the above embodiments of the utility model are only examples for illustrating the utility model, and are not limited to the embodiments of the utility model. Other obvious changes or variations derived from the essential spirit of the utility model still belong to the protection scope of the utility model.

Claims

1. A sampling device for determining iron-containing waste hydrochloric acid, characterized in that, include: The sampling tube (1) is a hollow tube with a sampling hole (11) at its lower end and middle. The two sampling holes (11) are distributed 180° apart along the circumference of the tube (1). The sampling tube (1) forms a sample chamber (12) corresponding to the positions of the two sampling holes (11). The valve stem (2) is in sliding fit with the sampling tube (1); A valve stem support block (3) is fixed inside the sampling tube (1). A through hole (31) is provided in the middle of the valve stem support block (3). The valve stem (2) is sealed and slidably assembled in the through hole (31). Two valve cores (4) are fixed on the valve stem (2), and the two valve cores (4) correspond to the positions of the two sample chambers (12) respectively. When the valve stem (2) slides to the first position, the valve core (4) is inserted into the sample chamber (12) to close the sampling hole (11). When the valve stem (2) slides to the second position, the valve core (4) is disengaged from the sample chamber (12) to open the sampling hole (11).

2. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The sampling hole (11) is located at the center of the sample chamber (12) in the axial direction, or at the lower part of the sample chamber (12) near the bottom.

3. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The sampling hole (11) is provided with an outwardly flared guide funnel (13) on the outside, and the axis of the guide funnel (13) forms an angle of 30-60° with the axis of the sampling tube (1).

4. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The upper end of the valve stem (2) extends out of the sampling tube (1), the upper end of the sampling tube (1) is provided with a first operating handle (5), and the upper end of the valve stem (2) is provided with a second operating handle (6). The first operating handle (5) and the second operating handle (6) extend horizontally in opposite directions respectively.

5. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The sampling tube (1) and the valve stem (2) are made of 316L stainless steel substrate, and the outer surface is coated with a polytetrafluoroethylene anti-corrosion coating with a thickness of 0.1-0.3mm.

6. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The inner wall of the through hole (31) is provided with a first annular sealing groove (32), and a first sealing ring (7) made of fluororubber is embedded in the first annular sealing groove (32). The inner diameter of the first sealing ring (7) is 0.2-0.5mm smaller than the outer diameter of the valve stem (2).

7. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The lower surface of the upper valve core (4) and the upper surface of a valve stem support block (3) form a sample chamber (12), and the lower surface of the lower valve core (4) and the bottom plate of the sampling tube (1) form another sample chamber (12).

8. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1 or 7, characterized in that: The sampling tube (1) is a two-section combined structure consisting of an upper tube body (14) and a lower tube body (15). The two sample chambers (12) are located at the lower ends of the upper tube body (14) and the lower ends of the lower tube body (15), respectively.

9. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The outer wall of the valve core (4) is provided with a second annular sealing groove (41), and a second sealing ring (8) made of fluororubber is embedded in the second annular sealing groove (41). The outer diameter of the second sealing ring (8) is 0.3-0.8 mm larger than the inner diameter of the sample chamber (12).

10. The sampling device for determining iron-containing waste hydrochloric acid according to claim 1, characterized in that: The outer wall of the sampling tube (1) is provided with a depth gauge with the zero point located at the lower end.

Images