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CN-122016398-A - Pneumatic airtight sampling device and sampling method suitable for sulfonated phenolic resin

CN122016398ACN 122016398 ACN122016398 ACN 122016398ACN-122016398-A

Abstract

The invention discloses a pneumatic airtight sampling device and a sampling method suitable for sulfonated phenolic resin. The device comprises a mechanism supporting frame, a traction lifting mechanism arranged at the top of the mechanism supporting frame, a lifting closed bin and a control mechanism which are arranged on the mechanism supporting frame, a pneumatic valve arranged at the bottom of the mechanism supporting frame, and an external sampling cup, wherein the pneumatic valve is used for being connected with a sampling hole of a reaction kettle, an opening at the bottom of the lifting closed bin is slidably connected with the mechanism supporting frame and can do lifting motion on the mechanism supporting frame, a traction piece of the traction lifting mechanism passes through the lifting closed bin, the bottom of the traction piece is connected with a sampling barrel, and the barrel diameter of the sampling barrel is smaller than the valve inner diameter of the pneumatic valve. The invention adopts a double sealing structure, avoids harmful gas leakage or liquid splashing, and can complete the whole sampling process by only one operator, thereby reducing the labor cost.

Inventors

  • XUE JUN
  • ZHANG YAOBING
  • GUO ZHIMING
  • LI GUANGYOU
  • LI SHUGANG
  • FU QIAN
  • ZHONG XIANG
  • CUI JING
  • DONG FANGHUI

Assignees

  • 中国石油天然气股份有限公司
  • 新疆塔科深地能源技术开发有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. Pneumatic airtight sampling device suitable for sulfonated phenolic resin, its characterized in that: The device comprises a mechanism supporting frame, a traction lifting mechanism arranged at the top of the mechanism supporting frame, a lifting closed bin and a control mechanism (9) which are arranged on the mechanism supporting frame, a pneumatic valve arranged at the bottom of the mechanism supporting frame, and an external sampling cup, wherein the control mechanism (9) is electrically connected with the pneumatic valve, the traction lifting mechanism and the lifting closed bin (5), and the pneumatic valve is used for being connected with a sampling hole of a reaction kettle (13); The control mechanism (9) is arranged at the upper part of the structural support frame, the bottom of the lifting sealing bin (5) is opened and is in sliding connection with the structural support frame, lifting movement can be carried out on the structural support frame, a traction piece of the traction lifting mechanism penetrates through the lifting sealing bin, the bottom of the traction piece is connected with a sampling bucket (12), and the bucket diameter of the sampling bucket (12) is smaller than the valve inner diameter of the pneumatic valve.
  2. 2. A pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 1, wherein: The mechanism support frame comprises a main frame (2) and a sliding connector; The main frame (2) is composed of a square top plate and four square tubes arranged at four corners of the square top plate, the square top plate is provided with through holes for the traction pieces of the traction lifting mechanism to pass through, and the four square tubes are connected to the top of the pneumatic valve; The sliding connecting piece comprises two lifting air cylinders (6), two pneumatic sliding blocks (3) and two sliding rods (4), wherein the two sliding rods (4) are symmetrically connected to two sides inside the main frame (2), the two pneumatic sliding blocks (3) are respectively sleeved on the outer sides of the two sliding rods (4) through sliding holes, the output ends of the two lifting air cylinders (6) are respectively and fixedly connected with the two pneumatic sliding blocks (3), the two pneumatic sliding blocks (3) are fixedly connected with the inner wall of the lifting sealing bin (5), and the two lifting air cylinders (6) are electrically connected with the control mechanism (9).
  3. 3. A pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 2, wherein: the lifting sealing bin (5) is a bin body with a cylindrical shape and an opening at the lower end, the inner wall of the bin body is fixedly connected with two pneumatic sliding blocks (3) plates, and a sliding hole for the traction piece to pass through is reserved at the top of the bin body.
  4. 4. A pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 3, wherein: the traction lifting mechanism comprises a pneumatic winch (7) and a Kevlar rope (8); the pneumatic winch (7) is fixedly connected to a square top plate of the main frame (2); the Kevlar material rope (8) is used as a traction piece of the traction lifting mechanism, one end of the Kevlar material rope is fixed at the output end of the pneumatic winch (7), and the other end of the Kevlar material rope sequentially penetrates through the through hole on the square top plate and the top sliding hole of the lifting sealing bin (5) and then is connected with the sampling barrel (12).
  5. 5. The pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 4, wherein: and a sealing piece is arranged between the Kevlar material rope (8) and the sliding hole at the top of the lifting sealing bin (5).
  6. 6. The pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 4, wherein: the visual mark is preset on the Kevlar material rope (8), and a mark observation window is arranged on the outer surface of the lifting sealing bin (5).
  7. 7. The pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 4, wherein: The pneumatic valve adopts a double-flange pneumatic valve (1), one end of the double-flange pneumatic valve (1) is connected with a sampling hole of a reaction kettle (13) for producing sulfonated phenolic resin, and the other end of the double-flange pneumatic valve is connected with the bottoms of four square tubes of the main frame (2).
  8. 8. A pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 1, wherein: The sampling bucket (12) is of a lower liquid inlet type structure, and a sealing block which is automatically opened and closed by means of buoyancy and gravity is arranged at the bottom of the bucket body of the sampling bucket (12).
  9. 9. The pneumatic closed sampling device for sulfonated phenolic resin as claimed in claim 8, wherein: an ejector rod is arranged in the middle of the cup body of the sampling cup, and the position of the ejector rod is matched with a barrel bottom sealing block of the sampling barrel (12).
  10. 10. A sampling method suitable for sulfonated phenolic resin based on the pneumatic closed sampling device suitable for sulfonated phenolic resin as claimed in claims 1-9, characterized by comprising the following steps: S1, checking connection conditions of all parts of a pneumatic airtight sampling device, ensuring that the opening and closing states of a pneumatic valve are normal, a traction lifting mechanism is free from faults, and the bottom of a lifting sealing bin (5) is abutted to the top of the pneumatic valve; S2, controlling the pneumatic valve to be opened through a control mechanism (9), establishing a sampling channel of the reaction kettle (13) and the pneumatic closed sampling device, and then controlling the traction lifting mechanism to drive the traction piece to be released downwards, so that a sampling barrel (12) is lowered into the reaction kettle (13) along with the traction piece passing through the sampling channel, and sampling of samples in the reaction kettle (13) is realized by the sampling barrel (12); s3, controlling the traction lifting mechanism to drive the traction piece to lift upwards through the control mechanism (9), enabling the sampling barrel (12) to lift into the lifting closed bin along with the traction piece passing through the sampling channel, and then controlling the pneumatic valve to be closed through the control mechanism (9); S4, controlling the lifting closed bin to ascend through the control mechanism (9) so that the bin gate is opened, collecting the sample collected by the sampling bucket (12) by using the sampling cup, and finally controlling the lifting closed bin (5) to descend through the control mechanism (9) to close the bin gate so as to restore the pneumatic closed sampling device to an initial state.

Description

Pneumatic airtight sampling device and sampling method suitable for sulfonated phenolic resin Technical Field The invention belongs to the technical field of chemical production equipment, and particularly relates to a pneumatic airtight sampling device and a sampling method suitable for sulfonated phenolic resin. Background In the production process of the sulfonated phenolic resin, the temperature in the sulfonation reaction stage needs to be strictly controlled at 90-100 ℃, and meanwhile, the viscosity of the resin needs to be detected through multiple sampling so as to ensure that the quality of the product reaches the standard. At present, a traditional manual salvage type sampling mode is commonly adopted in the industry, and the specific operation flow is that an operator opens a sampling port of a reaction kettle, stretches a steel wire rope hung with a sampling tube into the kettle, and obtains a liquid sample in the kettle through salvage action. The sampling mode has a plurality of outstanding problems, and is specifically as follows: Firstly, hot air containing formaldehyde and other irritant substances in the reaction kettle can overflow in a large amount along with the opening of the sampling port, so that the environment of a workshop is polluted, and the health of respiratory systems, nervous systems and the like of staff is directly endangered; secondly, the sampling port and the peripheral area are affected by high-temperature conduction in the reaction kettle, the surface temperature is extremely high, and operators are easy to scald due to contact in the sampling process; Thirdly, the sampling tube for sampling is easy to fall off from the steel wire rope in use, if the falling sampling tube is clamped on the stirring blade of the reaction kettle, equipment failure can be directly caused, and then materials in the reaction kettle are wasted, so that raw material waste and production interruption are caused; fourthly, the steel wire rope is used in a corrosive medium in the reaction kettle for a long time, corrosion fracture is easy to occur, and once the steel wire rope and the sampling tube fall into the reaction kettle together, equipment damage can be further aggravated, so that maintenance cost is increased, and production dead time is prolonged. In addition, the four types of reactor sampling devices currently in the market mainly cannot meet the sampling requirements of sulfonated phenolic resin, and the specific defects are as follows: The first type is a vacuum sampler, which uses negative pressure to realize liquid suction sampling, and can realize closed sampling to a certain extent, but is only suitable for clear, thin, good-fluidity and low-concentration liquid. The sulfonated phenolic resin has high viscosity, is easy to adhere to the inner wall of a pipeline and a core component of a vacuum sampler in the sampling process, is difficult to clean, can be quickly solidified at normal temperature, causes pipeline blockage, and cannot carry out the next sampling work; The second type is a pump type sampler, the device relies on pump body power to absorb liquid, the application range is similar to that of a vacuum sampler, and the device is only suitable for clear and good-fluidity liquid. For viscous sulfonated phenolic resin, the viscous sulfonated phenolic resin can adhere to the surfaces of a pump cavity, a pipeline and a valve, parts are blocked due to normal-temperature solidification, the subsequent maintenance and cleaning difficulties are extremely high, and finally secondary sampling cannot be realized; The third type is a sampler under the kettle, the device is arranged below the reaction kettle, and liquid in the kettle naturally flows into a sampling tank by utilizing gravity, but sulfonated phenolic resin is easy to solidify at normal temperature, so that a valve and a pipeline of the device are blocked, the device is difficult to clean after the blockage, and the sampling work cannot be normally performed directly; the fourth type is an automatic opening and closing type closed sampling device of a reaction kettle, which belongs to a rope sampler, and has no complicated pipeline structure, but has the defects that firstly, a sampling bin is lifted by a single cylinder and is unbalanced in lifting, gaps are formed between the sampling bin and a flange after the sampling bin is closed, so that the sealing effect is poor, the tightness of the sampling process cannot be ensured, secondly, a winch and a rope are not installed on the reaction kettle, a distance of 2 meters is reserved between the winch and the reaction kettle, the rope moves at a high speed between the winch and the reaction kettle during sampling, a spark can be generated in the friction process of the steel rope and a pulley, the safety risk of explosion is generated, meanwhile, the steel rope moving at a high speed can possibly cause mechanical injury to operators, thirdly, the steel rope is required