Waste gas extractor for chlor-alkali chemical quality inspection

Abstract

The utility model discloses a waste gas extractor for chlor-alkali chemical quality inspection, which comprises a sampler and a screwed pipe joint communicated with a waste gas conveying pipeline, the screwed pipe joint is in threaded connection with a blanking cap, the sampler comprises a cylinder with an opening at one end, the opening end of the cylinder is sleeved with an end cover in a threaded fit manner, and the end cover is provided with a threaded hole. A sliding rod is slidably arranged on the end cover in a penetrating mode, a piston is detachably connected to the end, located in the cylinder, of the sliding rod, and a plurality of sealing rings are embedded in the peripheral wall of the piston. When the sampler is used, the sliding rod can be operated through the handle so as to drive the piston to move in the cylinder body, so that a sample can be extracted and output, the operation is simple and convenient, the extraction rate of the sample can be manually controlled, in addition, the sliding rod is detachably connected with the piston, and after sampling is completed, the sliding rod can be detached from the piston and extracted from the cylinder body, so that the operation is simple and convenient. The barrel body and the sliding rod are separately stored, so that the sampler is convenient to carry and transfer, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a waste gas sampling device, in particular to a waste gas extractor for quality inspection of chlor-alkali chemical industry. Background Art

[0002] The chlor-alkali industry refers to the industrial method of electrolyzing saturated sodium chloride solution to produce sodium hydroxide, chlorine and hydrogen, and using them as raw materials to produce a series of chemical products. The chlor-alkali industry is one of the most basic chemical industries. In addition to being used in the chemical industry itself, its products are also widely used in light industry, textile industry, metallurgical industry, petrochemical industry and public utilities.

[0003] The waste gas generated by the chlor-alkali industry mainly contains chlorine, hydrogen chloride, vinyl chloride, mercury, acetylene, etc. In the quality inspection process of chlor-alkali chemical industry, it is necessary to use sampling equipment to sample the waste gas, and use analytical instruments to analyze the samples, so as to treat or recover the various components in the waste gas in a targeted manner in the waste gas treatment project.

[0004] After searching, the patent with announcement number CN216284531U discloses a waste gas sampling tube. When collecting gas, the exhaust main body is opened, and then the operating main body is opened, and then the front end of the sample tube is aimed at the target exhaust port, and the gas is collected by squeezing the piston backward by the gas; when exhausting, the injection nozzle is aimed at the target monitoring point, and then the operating main body is operated to drive the purification main body to guide the gas into the injection nozzle through the second sealing cover, and finally the gas is discharged to the target through the injection nozzle, which facilitates the exhaust at the target.

[0005] Although the above scheme can collect exhaust gas, it completely relies on the pressure difference between the exhaust gas delivery pipeline and the sampling mechanism to drive the piston movement to collect the exhaust gas into the sampling mechanism. It is not convenient for the operator to actively control the sampling rate. When the sample is discharged, additional air supply equipment needs to be connected to push the piston to move. It is inconvenient to use and needs to be improved. Utility Model Content

[0006] The purpose of the utility model is to provide a waste gas extractor for quality inspection of chlor-alkali chemical industry to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A waste gas extractor for quality inspection in chlor-alkali chemical industry, comprising a sampler and a threaded pipe joint connected to a waste gas delivery pipeline, a plugging cover being threadedly connected to the threaded pipe joint, the sampler comprising a barrel with an opening at one end, the open end of the barrel being sleeved with an end cap by threaded cooperation, a sliding rod being slidably penetrated through the end cap, one end of the sliding rod being located in the barrel and being detachably connected to a piston, a plurality of sealing rings being nested on the outer peripheral wall of the piston, the other end of the sliding rod being fixedly connected to a handle, the other end of the barrel being fixedly connected to an air inlet pipe and an air outlet pipe, and the ends of the air inlet pipe and the air outlet pipe away from the barrel being fixedly connected to a connecting sleeve adapted to the threaded pipe joint, a screw plug being threadedly connected to the inner surface of the connecting sleeve.

[0009] As a further solution of the utility model: a one-way valve is installed in both the air inlet pipe and the air outlet pipe, and the ventilation directions of the two one-way valves are opposite.

[0010] As a further solution of the utility model: a threaded hole is provided on the top of the piston, and the bottom end of the slide rod is connected to the threaded hole through an external thread, a plurality of locating pins are fixedly connected to the top inner wall of the end cover, and arc grooves are provided on the top surface of the piston at the corresponding positions of each locating pin.

[0011] As a further solution of the utility model: the top end of the end cover is fixedly connected with a conduit adapted to the slide rod, the slide rod passes through the conduit, and the top of the end cover is provided with a vent hole connected to the cylinder.

[0012] As a further solution of the utility model: the exhaust gas conveying pipeline is connected with a sampling tube through a tee, the threaded pipe joint is arranged at one end of the sampling tube away from the tee, and a valve is installed on the sampling tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] When the utility model is in use, the slide rod can be operated by a handle to drive the piston to move in the cylinder to realize the extraction and output of the sample. The operation is simple and convenient, and the extraction rate of the sample can be manually controlled. In addition, the slide rod and the piston are detachably connected. After the sampling is completed, the slide rod can be removed from the piston and drawn out of the cylinder to facilitate the separate storage of the cylinder and the slide rod, thereby facilitating the carrying and transportation of the sampler, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the structure of a waste gas extractor for quality inspection in chlor-alkali chemical industry.

[0016] Figure 2 The present invention is a schematic diagram of the structure of a sampler in a waste gas extractor for quality inspection in the chlor-alkali chemical industry.

[0017] Figure 3 The diagram is a top view of the structure of a piston in a waste gas extractor for quality inspection in the chlor-alkali chemical industry.

[0018] Among them, the exhaust gas conveying pipeline 1, the tee 2, the sampling tube 3, the valve 4, the threaded pipe joint 5, the cylinder 6, the air inlet pipe 7, the air outlet pipe 8, the one-way valve 9, the connecting sleeve 10, the screw plug 11, the end cover 12, the conduit 13, the sliding rod 14, the handle 15, the piston 16, the threaded hole 17, the sealing ring 18, the arc groove 19, the positioning pin 20, and the vent hole 21. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 3 In an embodiment of the utility model, a waste gas extractor for quality inspection of chlor-alkali chemical industry comprises a sampler and a threaded pipe joint 5 connected to a waste gas delivery pipeline 1, a plugging cover (not shown in the figure) being threadedly connected to the threaded pipe joint 5, the sampler comprises a barrel 6 with an opening at one end, an end cap 12 being sleeved on the open end of the barrel 6 through a threaded fit, a sliding rod 14 being slidably penetrated on the end cap 12, one end of the sliding rod 14 being located in the barrel 6 is detachably connected to a piston 16, a plurality of sealing rings 18 are nested on the outer peripheral wall of the piston 16, a handle 15 is fixedly connected to the other end of the sliding rod 14, an air inlet pipe 7 and an air outlet pipe 8 are fixedly connected to the other end of the barrel 6, and the ends of the air inlet pipe 7 and the air outlet pipe 8 away from the barrel 6 are fixedly connected to a connecting sleeve 10 adapted to the threaded pipe joint 5, a screw plug 11 is threadedly connected to the inner thread of the connecting sleeve 10.

[0021] The utility model adopts the above scheme, after removing the screw plug 11 in the connecting sleeve 10 at the end of the air inlet pipe 7 and the plugging cover on the threaded pipe joint 5, the connecting sleeve 10 at the end of the air inlet pipe 7 is matched and connected with the threaded pipe joint 5, and then the handle 15 is pulled by hand to drive the piston 16 to move in the cylinder 6 through the slide rod 14, so that the chlor-alkali chemical waste gas in the waste gas conveying pipeline 1 can be sucked into the cylinder 6. After the sampling is completed, the screw plug 11 and the plugging cover can be reinstalled. When the waste gas sample needs to be output to the analysis instrument, it is only necessary to remove the screw plug 11 on the outlet pipe 8, and after connecting the connecting sleeve 10 at the end of the outlet pipe 8 with the air inlet joint on the analysis instrument, the handle 15 is pushed by hand to move the piston 16 toward the outlet pipe 8, so that the waste gas in the cylinder 6 can be discharged from the outlet pipe 8. The operation is simple and convenient.

[0022] Specific combination Figure 2 In one embodiment of the utility model, a one-way valve 9 is installed in both the air inlet pipe 7 and the air outlet pipe 8, and the ventilation directions of the two one-way valves 9 are opposite. The one-way valve 9 in the air inlet pipe 7 only allows the gas to flow from the air inlet pipe 7 into the cylinder 6, and the one-way valve 9 in the air outlet pipe 8 only allows the gas in the cylinder 6 to be discharged outward from the air outlet pipe 8.

[0023] By setting the two one-way valves 9, when the screw plug 11 is not installed on the connecting sleeve 10, as long as the operator does not cause the piston 16 to move in the cylinder 6 due to misoperation of the handle 15, it can be avoided that the exhaust gas sample is discharged or the outside air is drawn into the cylinder 6, which makes it safer to use.

[0024] Specific combination Figure 2 and Figure 3 In one embodiment of the utility model, a threaded hole 17 is provided on the top of the piston 16, and the bottom end of the slide rod 14 is connected to the threaded hole 17 through an external thread, and a plurality of positioning pins 20 are fixedly connected to the top inner wall of the end cover 12, and arc grooves 19 are provided on the top surface of the piston 16 and at the corresponding positions of each positioning pin 20.

[0025] Through the cooperation between the slide rod 14 and the threaded hole 17, after the sampling is completed and the screw plug 11 is installed, the slide rod 14 can be rotated on the piston 16 to remove the slide rod 14 from the piston 16, and then the slide rod 14 can be pulled out of the cylinder 6, and the cylinder 6 and the slide rod 14 can be stored separately, so as to facilitate the carrying and transportation of the sampler. Through the cooperation between the locating pin 20 and the arc groove 19, it is only necessary to move the piston 16 to the open end of the cylinder 6, and insert the locating pin 20 into the corresponding arc groove 19, rotate the slide rod 14 to drive the piston 16 to rotate, and after the locating pin 20 is against the inner wall of one end of the arc groove 19, the piston 16 can be prevented from continuing to rotate, thereby facilitating the disassembly and assembly of the slide rod 14 on the piston 16.

[0026] Specific combination Figure 2 In one embodiment of the utility model, the top end of the end cover 12 is fixedly connected with a conduit 13 adapted to the slide rod 14, the slide rod 14 passes through the conduit 13, and the top of the end cover 12 is provided with a vent hole 21 connected to the cylinder 6.

[0027] The provision of the conduit 13 can guide the slide rod 14 , and the provision of the vent hole 21 can allow the space above the piston 16 in the cylinder 6 to communicate with the outside.

[0028] Specific combination Figure 1 and Figure 2In one embodiment of the utility model, the exhaust gas delivery pipeline 1 is connected to a sampling tube 3 through a tee 2, the threaded pipe joint 5 is arranged at one end of the sampling tube 3 away from the tee 2, and a valve 4 is installed on the sampling tube 3.

[0029] By setting the tee 2, the sampling tube 3 and the valve 4, it is possible to prevent the chlor-alkali chemical waste gas from leaking from the threaded pipe joint 5 when the waste gas is not sampled.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waste gas extractor for quality inspection of chlor-alkali chemical industry, characterized by: The invention comprises a sampler and a threaded pipe joint (5) connected to an exhaust gas conveying pipe (1), wherein a plugging cover is threadedly connected to the threaded pipe joint (5), and the sampler comprises a cylinder (6) with an opening at one end, and the open end of the cylinder (6) is sleeved with an end cover (12) through a threaded fitting, and a sliding rod (14) is slidably penetrated through the end cover (12), and one end of the sliding rod (14) located in the cylinder (6) is detachably connected to a piston (16), and a plurality of sealing rings (18) are embedded in the outer peripheral wall of the piston (16), and the other end of the sliding rod (14) is fixedly connected to a handle (15), and the other end of the cylinder (6) is fixedly connected to an air inlet pipe (7) and an air outlet pipe (8), and the ends of the air inlet pipe (7) and the air outlet pipe (8) away from the cylinder (6) are fixedly connected to a connecting sleeve (10) adapted to the threaded pipe joint (5), and a screw plug (11) is threadedly connected to the inner surface of the connecting sleeve (10).

2. A waste gas extractor for quality inspection of chlor-alkali chemical industry according to claim 1, characterized in that: One-way valves (9) are installed in both the air inlet pipe (7) and the air outlet pipe (8), and the ventilation directions of the two one-way valves (9) are opposite.

3. A waste gas extractor for quality inspection of chlor-alkali chemical industry according to claim 1, characterized in that: A threaded hole (17) is provided at the top of the piston (16), and the bottom end of the slide rod (14) is connected to the threaded hole (17) through an external thread. A plurality of positioning pins (20) are fixedly connected to the top inner wall of the end cover (12), and arc grooves (19) are provided at the top surface of the piston (16) and at the corresponding positions of each positioning pin (20).

4. A waste gas extractor for quality inspection of chlor-alkali chemical industry according to claim 1, characterized in that: The top end of the end cover (12) is fixedly connected to a conduit (13) adapted to the slide rod (14), the slide rod (14) passes through the conduit (13), and the top of the end cover (12) is provided with a vent hole (21) connected to the cylinder (6).

5. The waste gas extractor for quality inspection of chlor-alkali chemical industry according to claim 1, characterized in that: The exhaust gas delivery pipeline (1) is connected to a sampling tube (3) via a tee (2); the threaded pipe joint (5) is arranged at one end of the sampling tube (3) away from the tee (2); and a valve (4) is installed on the sampling tube (3).

Images