CN212509594U

CN212509594U - Online sampling valve for low-pressure viscous toxic liquid

Info

Publication number: CN212509594U
Application number: CN202021041439.6U
Authority: CN
Inventors: 郭琨; 刘小荣; 兰瑛; 洪梅
Original assignee: China Chengda Engineering Co Ltd
Current assignee: China Chengda Engineering Co Ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-02-09
Anticipated expiration: 2030-06-09

Abstract

The utility model discloses an online sampling valve for low-pressure viscous toxic liquid, relating to the technical field of chemical sample detection; the vacuum sampling valve comprises a valve body, a flange joint, an upward-pulling valve rod, an assembling joint for connecting a sampling bottle and a vacuum pumping device, wherein a valve flow passage is arranged in the valve body, and a sampling port communicated with the valve flow passage is arranged at the lower end of the valve body; the valve body is connected with a lateral line of a process pipeline through a flange joint; the upper pull valve rod extends into a valve flow passage of the valve body and is matched and connected with the sampling port, and the top of the upper pull valve rod is provided with a quick switch for controlling the opening or closing of the sampling port; the side wall of the assembly joint is provided with an exhaust hole communicated with the sampling bottle, and the vacuumizing device is connected with the exhaust hole through a ventilation pipeline and is used for vacuumizing the sampling bottle; through implementing this technical scheme, can get representative sample by safe environmental protection, have better sample effect, have the piping simultaneously and simply, operate simple and easy, maintenance cost is low, long service life's characteristics.

Description

Online sampling valve for low-pressure viscous toxic liquid

Technical Field

The utility model relates to a chemical industry sample testing technical field, more specifically say, relate to an online sample valve that is used for viscous toxic liquid of low pressure.

Background

In the production process of low-pressure viscous toxic liquid such as PVC slurry and glyphosate of chemical products, a factory needs to sample and analyze key production links in order to ensure the product quality, so as to judge whether the product quality is stable and reliable. The existing sampling system mainly comprises a ball bladder, a plastic bottle or a steel bottle sampling system, and has the conditions of high dangerousness in the sampling process, complex sampling operation flow, and weak representativeness of obtained samples or no sample obtained in the face of process media such as high temperature, high pressure, strong corrosivity and the like.

In view of the above technical problems, how to safely and environmentally obtain a representative sample has always plagued the chemical operators in the field, and with the increasing strictness of domestic environmental protection, the online closed cyclic sampling of chemical devices is becoming more and more important, so that a closed cyclic sampling device suitable for chemical products, especially low-pressure, viscous and toxic liquids, needs to be developed in a matching manner.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned thick poisonous liquid airtight circulation sample big technical problem of the degree of difficulty of low pressure, the utility model aims to provide a thick poisonous liquid's online sample valve is glued to low pressure, its aim at can safe ring protects and gets representative sample, especially to low pressure vacuum, poisonous, glue thick and easily solidify fluid medium, has better sample effect, and it is simple to have the piping simultaneously, and the operation is simple and easy, the maintenance cost is low, long service life's characteristics.

The utility model adopts the technical scheme as follows:

an online sampling valve for low pressure viscous toxic liquid comprises

The valve body is internally provided with a valve flow passage which is horizontally arranged on the side line of the online process pipeline; the lower end of the valve body is provided with a sampling port communicated with the valve flow passage;

the flange joints are respectively arranged at the two ends of the valve flow passage and fixedly connected with the valve body, and are connected with the side line of the process pipeline through the flange joints;

the upper pull valve rod extends into the valve flow channel of the valve body and is matched and connected with the sampling port, and a quick switch for controlling the opening or closing of the sampling port is arranged at the top of the upper pull valve rod;

the assembling joint is arranged at the sampling port and fixedly connected with the valve body, the assembling joint is used for connecting a sampling bottle, a connecting through hole is formed in the middle of the assembling joint so that the sampling bottle is communicated with the sampling port, and an exhaust hole communicated with the sampling bottle is formed in the side wall of the assembling joint;

and the vacuumizing device is connected with the exhaust hole through a ventilation pipeline and is used for vacuumizing the sampling bottle.

The working principle of the technical scheme is as follows: aiming at the technical problem of high difficulty in online sampling of low-pressure viscous toxic liquid media, a flange joint is utilized to install a sampling valve on the side line of an online process pipeline and then the media are kept in flowing circulation in a valve flow channel; after the sampling bottle is assembled through the assembling joint, the sampling bottle is vacuumized through an exhaust passage formed by a vacuumizing device, an exhaust hole in the side wall of the assembling joint and an exhaust device pipeline, and a sampling opening is opened through a quick switch after the pressure in the sampling bottle is lower than that in a valve flow passage, so that a sample medium in the valve flow passage flows into the sampling bottle; after a proper amount of sample medium is obtained, resetting the pull-up valve rod through a quick switch, and further closing the sampling port; by above-mentioned structure, adopt evacuation sampling principle, can get representative sample by safe environmental protection, especially to low pressure vacuum, poisonous, glue thick and easily solidify fluid medium, have better sample effect, have the piping simultaneously and simply, the operation is simple and easy, the maintenance cost is low, long service life's characteristics.

Optionally, the sampling port is a tapered communication hole, and the inner diameter of the tapered communication hole is gradually reduced along the side far away from the valve flow channel; the bottom of the upper pull valve rod is provided with a conical plug head matched with the sampling port. The sampling hole with a conical structure has a fine-tuning pressure reduction function, and overflow caused by overhigh pressure and overhigh flow speed can be effectively avoided by adjusting the flow speed; on the other hand has sealed effect, can effectively guarantee after sealing the sample connection that the valve body sample connection can not produce the weeping phenomenon.

Optionally, the conical plug with be equipped with the annular groove on the lateral wall that the sample connection contacted to at the embedded sealing washer that is equipped with of annular groove, with the sealing performance of further improvement sample connection, avoid the low pressure to glue thick poisonous liquid and have the leakage risk, guarantee the safety in utilization of sample valve.

Optionally, the inner side of the fitting joint is provided with an internal thread matched with the bottle mouth of the sampling bottle, so that the sampling bottle is screwed into the fitting joint and is in threaded connection with the fitting joint. By adopting the structure, the sampling bottle is convenient to disassemble and assemble, and the threaded connection is stable and reliable.

Optionally, the pull-up valve rod is arranged perpendicular to the flow direction of the medium in the valve flow channel. The valve body and the valve runner are horizontally arranged, so that the sampling port can be conveniently and quickly opened and closed.

Optionally, the quick switch includes quick-open handle and compression spring, quick-open handle locates the valve body outside and is connected with pull-up valve rod top, compression spring locates the valve body inboard and the cover is located on the pull-up valve rod to make pull-up valve rod self return after the sample is accomplished. So can lift up the pull-up valve pole to location height through lifting up the quick-open handle, open the sample connection fast, also can utilize compression spring to make the quick return of pull-up valve pole and seal the sample connection after the sample, this structural design is simple ingenious.

Optionally, an activated carbon adsorption tank is arranged on the ventilation pipeline and used for adsorbing residual dangerous gas of the ventilation pipeline. After so the sample is ended, remaining hazardous gas in the pipeline of taking a breath can discharge again after filtering through the active carbon adsorption jar, realizes the environmental protection sample.

Optionally, the active carbon adsorption tank is arranged between the exhaust hole and the vacuumizing device, the environment-friendly and pollution-free gas extracted through the active carbon adsorption tank is ensured, the residual gas in the ventilation pipeline is completely extracted through the vacuumizing device, the safe and environment-friendly sampling is realized, and a better using effect is achieved.

As described above, the present invention has at least the following advantages over the prior art:

1. the utility model discloses online sample valve can effectively solve the technical problem that the airtight circulation of current low pressure viscous toxic liquid sample the degree of difficulty is big, adopts evacuation sample principle, can get representative sample by safety ring, especially to low pressure vacuum, poisonous, glue thick and easily solidify fluid medium, has better sample effect, and it is simple to have the piping simultaneously, and the operation is simple and easy, the maintenance cost is low, long service life's characteristics.

2. The online sampling valve adopts the sampling port with a conical structure for sampling, has the functions of fine adjustment and pressure reduction on one hand, and can effectively avoid overflow caused by overhigh pressure and overhigh flow speed by adjusting the flow speed; on the other hand has sealed effect, can effectively guarantee after sealing the sample connection that the valve body sample connection can not produce the weeping phenomenon, and its design that combines pull-up valve rod toper chock plug sealing washer can further improve the sealing performance of sample connection, guarantees the safety in utilization of sample valve.

3. The utility model discloses online sample valve upward-drawing valve rod disposes fast switch, can lift up the upward-drawing valve rod to location height through lifting up the quick-open handle, opens the sample connection fast, does to utilize compression spring to make the quick return of upward-drawing valve rod and seal the sample connection after the sample is ended, and this structural design is simple ingenious, can accomplish the sample fast.

4. The utility model discloses dispose the active carbon adsorption jar on the pipeline of taking a breath of online sample valve, and the active carbon adsorption jar is located between exhaust hole and the evacuating device, ensure the gaseous environmental protection pollution-free of extraction through the active carbon adsorption jar, ensure that the residual gas in the pipeline of taking a breath extracts totally through evacuating device, realize safe environmental protection sample, have fine application prospect and using value widely, be fit for popularization and application.

Drawings

The invention will be described by way of example only and with reference to the accompanying drawings, in which

FIG. 1 is a flow chart of the sampling process of an online sampling valve for low pressure viscous toxic liquids according to an embodiment of the present invention;

FIG. 2 is a schematic view of an in-line sampling valve for low pressure viscous toxic liquids in accordance with an embodiment of the present invention;

fig. 3 is a schematic view of the cone plug of the pull-up valve rod and the sampling port in the embodiment of the present invention in fig. 2.

Description of reference numerals: 1-a flange joint; 2-valve flow channel; 3-pulling up the valve rod; 31-a conical plug; 32-an annular groove; 33-sealing ring; 4-a sampling port; 5-sampling a bottle; 6-a ventilation pipe; 7-activated carbon adsorption tank; 8-quick-opening handle; 9-an air pump; 10-a compression spring; 11-an exhaust hole; 12-a valve body; 13-fitting a joint; 14-process pipe side line.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Example one

In one embodiment, as shown in fig. 1 to 2: the embodiment provides an online sampling valve for low-pressure viscous toxic liquid, which is applied to closed circulating sampling equipment for low-pressure viscous toxic liquid, and comprises a valve body 12, a flange joint 1, an upper pull valve rod 3, an assembly joint 13 and a vacuumizing device, wherein the vacuumizing device selected in the embodiment is an air extracting pump 9, a valve flow passage 2 is arranged in the valve body 12, and the valve flow passage 2 is horizontally arranged on an online process pipeline side line 14; the lower end of the valve body 12 is provided with a sampling port 4 communicated with the valve flow passage 2, the two ends of the valve flow passage 2 are respectively provided with a flange joint 1 fixedly connected with the valve body 12, and the valve body 12 is connected with a process pipeline lateral line 14 through the flange joint 1.

The upper pull valve rod 3 extends into the valve flow channel 2 of the valve body 12 from top to bottom and is matched and connected with the sampling port 4, and the top of the upper pull valve rod 3 is provided with a quick switch for controlling the opening or closing of the sampling port 4; as the preferred of this embodiment, upward draw valve rod 3 and valve runner 2 in the medium flow direction be perpendicular setting, combine valve body 12 valve runner 2 to be horizontal setting, can be convenient and fast open and seal sample connection 4. Specifically, as shown in fig. 3, the sampling port 4 provided in this embodiment is a tapered communication hole, the inner diameter of which is gradually reduced along one side far away from the valve flow channel 2, the bottom of the pull-up valve rod 3 is provided with a tapered plug 31 adapted to the sampling port 4, and the sampling port with a tapered structure is adopted, so that on one hand, the sampling port has a fine-tuning pressure-reducing function, and overflow caused by overhigh pressure and overhigh flow rate can be effectively avoided by adjusting the flow rate; on the other hand, the valve body 12 has a sealing effect, and the sampling port 4 can be effectively prevented from leaking after the sampling port 4 is sealed.

As the preferred of this embodiment, be equipped with annular groove 32 on the lateral wall that conical plug head 31 and sample connection 4 contacted to at the embedded sealing washer 33 that is equipped with of annular groove 32, with the sealing performance of further improving sample connection 4, avoid the viscous and poisonous liquid of low pressure to have the leakage risk, guarantee the safety in utilization of sample valve.

The assembly joint 13 provided by this embodiment is disposed at the sampling port 4 and fixedly connected to the valve body 12, and the fixing manner may be welding, clamping or threaded connection, the assembly joint 13 is used for connecting the sampling bottle 5, specifically, an internal thread adapted to the mouth of the sampling bottle 5 is disposed on the inner side of the assembly joint 13, so that the sampling bottle 5 is screwed into the assembly joint 13 and threadedly connected to the assembly joint 13, and by adopting the above structure, the sampling bottle 5 is conveniently dismounted and mounted, and the threaded connection is stable and reliable; be equipped with connect the through-hole in assembly joint 13 middle part to make sample bottle 5 and sample connection 4 communicate, set up the exhaust hole 11 that is linked together with sample bottle 5 on assembly joint 13's lateral wall, aspiration pump 9 links to each other with exhaust hole 11 through pipeline 6 of taking a breath for to sample bottle 5 evacuation.

The specific implementation manner of this embodiment is: installing the sampling valve on the side line 14 of the online process pipeline by using the flange joint 1, and then keeping the medium flowing and circulating in the valve flow channel 2; after the sampling bottle 5 is assembled through the assembling joint 13, the sampling bottle 5 is vacuumized through an exhaust passage formed by the air pump 9, the exhaust hole 11 on the side wall of the assembling joint 13 and an exhaust device pipeline, and after the pressure in the sampling bottle 5 is lower than that in the valve flow passage 2, the sampling opening 4 is opened through the quick switch, so that a sample medium in the valve flow passage 2 flows into the sampling bottle 5; after a proper amount of sample medium is obtained, resetting the pull-up valve rod 3 through a quick switch, and further closing the sampling port 4; by above-mentioned structure, adopt the evacuation sampling principle, can get the sample that has representativeness on online process pipeline siding 14 among the airtight circulation sampling equipment safely environmental protection, especially to low pressure vacuum, poisonous, glue thick and the easy solidification fluid medium, have better sample effect, have the piping simultaneously simple, easy operation, maintenance cost are low, long service life's characteristics.

Example two

The second embodiment is substantially the same as the first embodiment, except that: in order to complete the sampling operation quickly, the quick switch provided by the embodiment comprises a quick-opening handle 8 and a compression spring 10, wherein the quick-opening handle 8 is arranged on the outer side of a valve body 12 and is connected with the top of an upward-pulling valve rod 3, and the compression spring 10 is arranged on the inner side of the valve body 12 and is sleeved on the upward-pulling valve rod 3, so that the upward-pulling valve rod 3 automatically returns after the sampling operation is completed; so can lift up pull-up valve rod 3 to location height through lifting up quick-open handle 8, open sample connection 4 fast, also can utilize compression spring 10 to make pull-up valve rod 3 quick return and seal sample connection 4 after the sample is ended, this structural design is simple ingenious.

EXAMPLE III

The third embodiment is substantially the same as the first embodiment, except that: as a preferable example of the first embodiment, in the present embodiment, an activated carbon adsorption tank 7 is disposed on the ventilation duct 6 to adsorb the residual hazardous gas in the ventilation duct 6; and the active carbon adsorption tank 7 is arranged between the exhaust hole 11 and the air pump 9, the environment-friendly and pollution-free extraction of the gas is ensured through the active carbon adsorption tank 7, and the clean extraction of the residual gas in the ventilation pipeline 6 is ensured through the air pump 9. So after the sample, remaining hazardous gas in the pipeline of taking a breath 6 can discharge again after filtering through activated carbon adsorption jar 7, realizes safe environmental protection sample, has better result of use.

To sum up, the utility model discloses online sample valve has following beneficial effect: the sampling device can effectively solve the technical problem that the existing low-pressure viscous toxic liquid is difficult to sample in a closed circulating manner, adopts a vacuumizing sampling principle, can safely and environmentally take a representative sample, particularly aims at low-pressure vacuum, toxic, viscous and easily-solidified fluid media, has a good sampling effect, and has the characteristics of simple piping, simplicity in operation, low maintenance cost and long service life; on one hand, the sampling device has a fine adjustment and pressure reduction function, and overflow caused by overhigh pressure and overhigh flow speed can be effectively avoided by adjusting the flow speed; on the other hand, the sampling valve has a sealing effect, the sampling port 4 of the valve body 12 can be effectively ensured not to leak liquid after the sampling port 4 is sealed, and the sealing performance of the sampling port 4 can be further improved by combining the design of the conical plug 31 sealing ring 33 of the pull-up valve rod 3, so that the use safety of the sampling valve is ensured; thirdly, the upper pull valve rod 3 is provided with a quick switch, the upper pull valve rod 3 can be lifted to a positioning height by lifting the quick opening handle 8, the sampling port 4 is quickly opened, and the upper pull valve rod 3 can be quickly returned to close the sampling port 4 by utilizing the compression spring 10 after sampling is finished; fourthly, dispose activated carbon adsorption jar 7 on the pipeline of taking a breath 6 of online sample valve, and activated carbon adsorption jar 7 locates between exhaust hole 11 and the evacuating device, ensure the gaseous environmental protection pollution-free of extraction through activated carbon adsorption jar 7, ensure through evacuating device that the residual gas in the pipeline of taking a breath 6 extracts totally, realize safe environmental protection sample, have fine application prospect and use value widely, be fit for popularizing and applying.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. An online sampling valve for low-pressure viscous toxic liquid, characterized in that: comprises that

2. The in-line sampling valve for low pressure viscous toxic liquids of claim 1, wherein: the sampling port is a conical communicating hole, and the inner diameter of the sampling port is gradually reduced along one side far away from the valve flow passage; the bottom of the upper pull valve rod is provided with a conical plug head matched with the sampling port.

3. The in-line sampling valve for low pressure viscous toxic liquids of claim 2, wherein: the outer side wall of the conical plug head, which is contacted with the sampling port, is provided with an annular groove, and a sealing ring is embedded in the annular groove.

4. The in-line sampling valve for low pressure viscous toxic liquids of claim 1, wherein: the inner side of the assembling joint is provided with an internal thread matched with the bottle mouth of the sampling bottle, so that the sampling bottle is screwed into the assembling joint and is in threaded connection with the assembling joint.

5. The in-line sampling valve for low pressure viscous toxic liquids of claim 1, wherein: the upward pull valve rod is perpendicular to the flow direction of the medium in the valve flow channel.

6. The in-line sampling valve for low pressure viscous toxic liquids of claim 1, wherein: the quick switch comprises a quick-opening handle and a compression spring, the quick-opening handle is arranged on the outer side of the valve body and connected with the top of the upward-pulling valve rod, and the compression spring is arranged on the inner side of the valve body and sleeved on the upward-pulling valve rod, so that the upward-pulling valve rod can automatically return after sampling is completed.

7. The in-line sampling valve for low pressure viscous toxic liquids of any one of claims 1 to 6, wherein: and the air exchange pipeline is provided with an activated carbon adsorption tank for adsorbing residual dangerous gas of the air exchange pipeline.

8. The in-line sampling valve for low pressure viscous toxic liquids of claim 7, wherein: the active carbon adsorption tank is arranged between the exhaust hole and the vacuum pumping device.