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CN-224216380-U - Sampling device for chemical waste gas detection

CN224216380UCN 224216380 UCN224216380 UCN 224216380UCN-224216380-U

Abstract

The utility model discloses a sampling device for detecting chemical waste gas, which relates to the technical field of chemical waste gas detection and aims to solve the technical problems that when a plug of the sampling device is pulled out from a waste gas storage tank, the external air enters to dilute a waste gas sample and influence the detection accuracy, and comprises a sampling tube and an internally-installed air suction rod, wherein the lower end of the sampling tube is fixedly provided with a sampling head, the inside of the sampling tube is fixedly provided with a plugging piece for plugging the opening of the sampling head, the sampling head comprises a connecting pipe, the lower end of the connecting pipe is integrally provided with a communicated insertion pipe, and the sampling head and the plugging piece are matched, so that the lug drives the baffle to move upwards through extrusion of the pipe orifice when the sampling head is inserted into the exhaust gas tank port, thereby pushing the plugging plate to move upwards and separate from the bottom of the inner cavity of the connecting pipe, achieving the effect of communication.

Inventors

  • QIANG WEI
  • QIANG QIANG
  • HUANG XUEFEI

Assignees

  • 南京恒检检测技术有限公司

Dates

Publication Date
20260508
Application Date
20250121

Claims (6)

  1. 1. The sampling device for detecting the chemical waste gas is characterized by comprising a sampling tube (1) and an internally-installed air extraction rod (2), wherein a sampling head (3) is fixedly arranged at the lower end of the sampling tube (1), and a plugging piece (4) for plugging an opening of the sampling head (3) is fixedly arranged in the sampling tube (1); The sampling head (3) comprises a connecting pipe (301), a communicated insertion pipe (302) is integrally formed at the lower end of the connecting pipe (301), and a corresponding movable groove (304) is formed in the side edge of the insertion pipe (302); The plugging piece (4) comprises a spring (401), a plugging plate (402) attached to the top of the inner cavity of the connecting pipe (301) is fixedly arranged at the lower end of the spring (401), two baffles (403) for plugging the movable grooves (304) are integrally formed at the bottom of the plugging plate (402), and protruding blocks (404) protruding to the outer side of the insertion pipe (302) are fixedly arranged on two opposite sides of the baffles (403).
  2. 2. The sampling device for detecting chemical waste gas according to claim 1, wherein the positioning block (305) having an arc shape is formed uniformly at the side edges of the movable groove (304) facing each other and the side edges of the protruding block (404) are provided with positioning grooves (405) combined with the positioning block (305).
  3. 3. The sampling device for detecting chemical waste gas according to claim 1, wherein the outer wall of the bottom of the sampling tube (1) is provided with a first external thread (102), and the inner wall of the connecting tube (301) is provided with a first thread groove (303) which is connected with the first external thread (102) in an adapting way.
  4. 4. The sampling device for chemical waste gas detection according to claim 1, wherein a hemispherical clamping groove (307) is formed on the outer wall of the connecting pipe (301), and a plurality of anti-slip grooves are further vertically formed on the outer wall of the connecting pipe (301).
  5. 5. The sampling device for detecting chemical waste gas according to claim 4, wherein a fixing ring (103) is fixedly arranged on the outer wall of the sampling tube (1), an elastic plate (104) close to the clamping groove (307) is fixedly arranged at the bottom of the fixing ring (103), and a clamping block (105) combined with the clamping groove (307) is fixedly arranged on the side face of the elastic plate (104).
  6. 6. The sampling device for chemical waste gas detection according to claim 1, wherein the inner wall of the lower end of the insertion tube (302) is provided with a second internal thread (306), and the outer wall of the filter element (5) is provided with a second external thread (501) which is connected with the second internal thread (306) in an adapting way.

Description

Sampling device for chemical waste gas detection Technical Field The utility model relates to the technical field of chemical waste gas detection, in particular to a sampling device for chemical waste gas detection. Background In the chemical production process, various waste gases are generated, and the components of the waste gases are complex, so that serious harm can be caused to the environment and human health. Accurate exhaust sampling is critical for effective monitoring and remediation of chemical exhaust gas. At present, in the design and operation process of some sampling devices, when the plug part of the sampling device is pulled out from the exhaust gas storage tank, external air is led to enter the sampling device because of the characteristic of loose sealing or airflow, the mixed air can dilute an exhaust gas sample, the component proportion of the mixed air is changed, the sample exhaust gas is caused to be sampled impure, the accuracy of exhaust gas detection is influenced, and the original state of chemical exhaust gas cannot be truly reflected. Disclosure of utility model The utility model aims to overcome the defects of the prior art, adapt to the actual needs, and provide a sampling device for detecting chemical waste gas, so as to solve the technical problems that the external air enters when a plug of the sampling device is pulled out from a waste gas storage tank, so that a waste gas sample is diluted, and the detection accuracy is affected. In order to solve the technical problems, the utility model provides the technical scheme that the sampling device for detecting the chemical waste gas comprises a sampling tube and an internally-installed air suction rod, wherein a sampling head is fixedly arranged at the lower end of the sampling tube, and a plugging piece for plugging an opening of the sampling head is fixedly arranged in the sampling tube; the sampling head comprises a connecting pipe, a communicated insertion pipe is integrally formed at the lower end of the connecting pipe, and a corresponding movable groove is formed on the side edge of the insertion pipe; The plugging piece comprises a spring, the lower end of the spring is fixedly provided with a plugging plate attached to the top of the inner cavity of the connecting pipe, the bottom of the plugging plate is integrally formed with two baffles for plugging the movable groove, and two protruding blocks protruding to the outer side of the insertion pipe are fixedly arranged on one side, deviating from the baffle, of each baffle. According to the utility model, through the cooperation of the sampling head and the blocking piece, when the sampling head is inserted into the exhaust gas tank opening, the convex block drives the baffle to move upwards through the extrusion of the pipe opening, so that the blocking plate is pushed to move upwards to be separated from the bottom of the inner cavity of the connecting pipe, and the communication effect is achieved, thus, the sample extraction can be carried out on the exhaust gas in the exhaust gas tank when the air suction rod is pulled, the blocking plate can be automatically reset under the action of the spring when the sampling pipe is pulled after the sample is extracted, the air suction opening can be blocked when the connecting pipe is not moved out of the tank opening, the external air is prevented from entering, the purity of the sample extraction can be improved, and the accuracy of subsequent detection is enhanced. Preferably, the opposite sides of the movable groove are provided with positioning blocks which are in arc shapes and are uniformly formed at the positions close to the bottoms, and the sides of the protruding blocks are provided with positioning grooves combined with the positioning blocks. Preferably, a first external thread is formed on the outer wall of the bottom of the sampling tube, and a first thread groove which is connected with the first external thread in an adaptive manner is formed on the inner wall of the connecting tube. Preferably, a hemispherical clamping groove is formed in the outer wall of the connecting pipe, and a plurality of anti-slip grooves are further vertically formed in the outer wall of the connecting pipe. Preferably, the outer wall of the sampling tube is fixedly provided with a fixing ring, the bottom of the fixing ring is fixedly provided with an elastic plate close to the clamping groove, and the side surface of the elastic plate is fixedly provided with a clamping block combined with the clamping groove. Preferably, the inner wall of the lower end of the insertion tube is provided with a second internal thread, and the outer wall of the filtering piece is provided with a second external thread which is connected with the second internal thread in an adaptive manner. Compared with the prior art, the utility model has the beneficial effects that: 1. According to the utility model, through the cooperation of the sampling hea