CN217006521U

CN217006521U - Floc in-situ collection device based on pressure difference principle

Info

Publication number: CN217006521U
Application number: CN202220544443.7U
Authority: CN
Inventors: 丁昀; 杨庆; 赵俊光; 明金洋; 郭文婧; 马乐; 何宗飞
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-19
Anticipated expiration: 2032-03-14

Abstract

The application discloses floc normal position collection system based on pressure differential principle relates to water treatment technical field. Can be through adjusting the speed that pneumatic choke valve relatively accurately controlled the floc and got into the sampler to the easy problem of destroying of floc property when overcoming the floc sample effectively can keep the morphological characteristic of floc better, convenient operation, simple structure can carry out the normal position collection to high concentration floc at water plant, laboratory and experimental site. The floc in-situ collection device based on the differential pressure principle comprises a sampling assembly, a buffer piece and a gas pipeline; a buffer cavity is arranged in the buffer piece; two ends of the buffer cavity are respectively communicated with the sampling assembly; a throttle valve is arranged on the air pipeline; the sampling component is provided with a balancing weight. The application is used for improving the performance of the floc in-situ collection device.

Description

Floc in-situ collection device based on pressure difference principle

Technical Field

The application relates to the technical field of water treatment, in particular to a floc in-situ collection device based on a pressure difference principle.

Background

Coagulation is one of the very important methods in water treatment, and is widely applied in various water treatment fields. In the coagulation process of water, the size, structure, compactness, strength and settling property of the floc all influence the solid-liquid separation effect in water, and the formation, crushing resistance and recovery performance of the floc play important roles in the particle separation process in water. Therefore, observation and analysis of the flocs are important in judging the coagulation effect.

In the study of flocs, the prior art generally uses a microscope and a mirror image analysis method to transport the formed flocs to a culture dish filled with water, and observe and analyze the flocs by an optical microscope and an image detection technology. But because in transportation process, floc surface stress is greater than the intensity of the inside bond of floc, certain broken phenomenon will take place for the floc, the floc surface has the drop of tiny granule, the size of floc can reduce, and the tiny granule in aquatic can increase, perhaps big floc can break into the little floc of a plurality of sizes, lead to when studying the floc, to floc structure, the research of size and fractal dimension is accurate inadequately, and because the floc size, the shape, the mutability and the surface breakage of constitution, broken mode on a large scale, the floc itself just has the complexity, breakable nature. Although a plurality of existing floc sampling methods exist, the methods can cause the breakage of flocs to a great extent and the damage and breakage of the flocs are difficult to observe, especially under the condition of high-concentration flocs, the device is difficult to control the sampling speed of the flocs, the flocs are difficult to avoid being damaged in different degrees in the floc sampling process, and meanwhile, the situation that gas enters the sampling device due to improper operation can also occur, and the breakage of the flocs is caused due to the pressure of the gas.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a floc normal position collection system based on pressure differential principle, can control the speed that the floc got into the sampler comparatively accurately to the easy problem of destroying of floc property, the morphological characteristic that keeps the floc better when effectively overcoming the floc sample.

In order to achieve the above object, an embodiment of the present application provides a floc in-situ collection device based on a differential pressure principle, including a sampling assembly, a buffer member and a gas pipeline; a buffer cavity is arranged in the buffer piece; two ends of the buffer cavity are respectively communicated with the gas pipeline and the sampling assembly; a throttle valve is arranged on the air pipeline; and the sampling assembly is provided with a balancing weight.

Further, the sampling assembly comprises a sampling tube and a sampling nozzle bonded to the end of the sampling tube.

Furthermore, the sampling nozzle is a taper pipe, the inner diameter of the large end of the taper pipe is equal to the drift diameter of the sampling pipe, and the small end of the taper pipe is subjected to fillet polishing treatment.

Furthermore, the cross-sectional area of the buffer cavity is 1.2-1.5 times of the flow area of the sampling tube.

Furthermore, the buffer part is a hollow cylinder with openings at two ends, and the two openings are respectively connected with the sampling assembly and the gas pipeline; the outside of bolster links firmly the mounting disc, the mounting disc is close to be equipped with the telescopic link on the terminal surface of trachea line, the axis of telescopic link with the axis of bolster is parallel.

Furthermore, the sampling assembly and the buffer piece are made of light-permeable materials.

Further, the balancing weight can be dismantled and be connected on the sampling tube.

Further, the air pipeline is connected to the buffer piece through a quick connector.

Further, the gas pipeline is a PU pipe.

Furthermore, the latus rectum of sampling tube with the main aspects internal diameter of sample mouth is 3 ~ 5 mm.

Compared with the prior art, the application has the following beneficial effects:

1. this application embodiment is through setting up the choke valve on the trachea way to through the aperture of adjusting the choke valve, utilize the pressure differential principle, the speed that accurately control the floc gets into the sampler, thereby the easy broken problem of floc when having solved the collection floc, comparatively complete moves the floc of assigned position and gets, thereby floc structure along the change of direction of height or the dynamic growth process of floc in the accurate reflection suspension mud sediment layer.

2. The embodiment of the application can adjust the air input through the opening degree of control choke valve, and the high concentration floc that will move to in the sampling tube removes dilutes and observes in observing the ware to solve the problem that the high concentration floc can't be observed.

3. This application embodiment plays the cushioning effect through setting up the cushion chamber between gas pipeline and sampling tube to the discharge and the suction of the intraductal gas of sampling, has avoided the sudden change of pressure to cause the broken phenomenon of floc to take place.

4. The embodiment of the application has the advantages of simple structure, convenience in operation, low processing cost and convenience in carrying.

5. The embodiment of the application has wide application scenes, is not limited by equipment and the height of the pool body, and can be used together with a floc character analysis device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a floc in-situ collection device based on a pressure difference principle according to an embodiment of the present application;

FIG. 2 is a schematic view of a connection structure of a sampling module and a buffer in a floc in-situ collection device based on a pressure difference principle according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meaning of the above terms in this application can be understood as appropriate by one of ordinary skill in the art.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

Referring to fig. 1 and 2, an embodiment of the present application provides a floc in-situ collection device based on a pressure difference principle, which includes a sampling assembly 1, a buffer 2 and a gas pipeline 3 connected in sequence from bottom to top.

The sampling assembly 1 comprises a sampling tube 11 and a sampling nozzle 12 bonded to the lower end surface of the sampling tube 11 and communicated with each other. The sampling nozzle 12 is a taper pipe with a large upper part and a small lower part, the inner diameter of the large end of the taper pipe is equal to the drift diameter of the sampling pipe 11, and the small end of the taper pipe is subjected to fillet polishing treatment. Specifically, the drift diameter of the sampling tube 11 and the inner diameter of the large end of the sampling nozzle 12 are both 3-5 mm.

The outer side of the sampling tube 11 is detachably connected with a balancing weight 5. The weight 5 can increase the weight of the sampling assembly 1, so that the sampling assembly can sink to any position of a sludge layer. In order to facilitate the disassembly and assembly, the balancing weight 5 is connected to the outer side of the sampling tube 11 through threads and is close to the sampling nozzle 12.

Referring to fig. 2, the buffer member 2 is a hollow cylinder having openings at both ends, and a buffer chamber 21 having a circular cross section is formed in the buffer member 2. Referring to fig. 1 and 2, the openings at the upper and lower ends of the buffer chamber 21 are respectively communicated with the air pipeline 3 and the sampling tube 11, and the sampling tube 11 is inserted into the opening at the lower part and then bonded to the buffer member 2. The cross-sectional area of buffer cavity 21 is 1.2 ~ 1.5 times of the through flow area of sampling tube 11, from this, can play the cushioning effect when sampling tube 11 breathes in the exhaust, avoids causing the floc to be broken because the gas volume sudden change in the sampling tube 11.

The sampling tube 11, the sampling nozzle 12 and the buffer member 2 are made of light-permeable material, such as acrylic material, so that the operator can observe the liquid level in the sampling tube 11 conveniently.

Referring to fig. 1, an annular mounting plate 8 is bonded to the outer side of the buffer 2, an expansion link 7 is connected to the upper end surface of the mounting plate 8, and the axis of the expansion link 7 is parallel to the axis of the buffer 2. Specifically, the lower extreme of telescopic link 7 is equipped with the external screw thread, and the upper end of mounting disc 8 is equipped with the internal thread with this external screw thread looks adaptation. The annular mounting plate 8 can be connected to the telescopic rod 7 without damaging the sealing property of the buffer chamber 21. Can also guarantee the holistic symmetry of this application embodiment sampling device, avoid the sample in-process to receive the rivers effect to take place to deflect. Meanwhile, the sampling operation of different specified depths can be conveniently carried out on the sampling tube 11 by adjusting the extension length of the telescopic rod 7.

In order to control the gas discharge rate of the sampling tube 11 more precisely, the gas line 3 should have a small diameter, for example, 4 × 2.5mm PU tube can be used and connected to the buffer member 2 by the quick connector 6. Specifically, the quick-connect connector 6 is connected to the upper end surface of the buffer member 2 through threads, and is sealed through a sealing member. The end of the gas line 3 is provided with a throttle 4, in particular, the throttle 4 may be a pneumatic throttle in order to increase the adjustment accuracy.

Referring to fig. 1 and 2, the working principle of the embodiment of the present application is as follows:

before sampling, throttle valve 4 is adjusted to a closed state.

When sampling, firstly, the telescopic rod 7 is held by hand to stretch the sampling nozzle 12, the sampling tube 11 and the balancing weight 5 in the embodiment of the application into an area to be sampled and stabilize the area, and it should be noted that the sampling tube 11 and the sampling nozzle 12 can sink to any position of a sludge layer under the action of the balancing weight 5; then, the throttle valve 4 is slowly opened, and at this time, the flocs and the liquid in the sludge layer are pressed into the sampling tube 11 and kept at the corresponding liquid level height under the action of the pressure difference along with the discharge of the gas in the sampling tube 12. Because the buffer chamber 21 has a buffer function and the throttle valve 4 is in a micro-opening state, the gas discharge rate and the liquid suction rate are both slow, and the polishing design of the sampling nozzle 12 simultaneously ensures that flocs have better integrity when sucked into the sampling tube 11.

After sampling, the throttle valve 4 is slowly adjusted to be closed, the upper part of the sampling tube 11 forms a micro vacuum under the action of gravity, and the liquid in the sampling tube 11 is stabilized in the tube under the action of atmospheric pressure because the atmospheric pressure is far greater than the pressure under vacuum. At this time, the sampling nozzle 12 is extended into the liquid of the observation vessel (not shown), the throttle valve 4 is slowly adjusted to be opened, and since the buffer chamber 21 has a buffer function and the throttle valve 4 is in a micro-opening state, the gas suction rate and the liquid discharge rate are both slow, the liquid in the sample 11 is gradually and gradually pressed into the observation vessel, and thus, the floc properties are less damaged.

The embodiment of the application establishes a simple and easy, convenient floc normal position collection system that can keep floc integrality, provides hardware support for the sample and the property observation of high concentration floc (suspension mud layer floc, mud floc). The device has utilized the principle of pressure differential, can be through adjusting the speed that pneumatic choke valve relatively accurately controlled the floc and got into the sampler to the easy problem of destroying of floc property when overcoming the floc sample effectively can keep the morphological characteristic of floc better, convenient operation, simple structure can carry out the normal position collection to high concentration floc at water plant, laboratory and experimental site.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A floc in-situ collection device based on a pressure difference principle is characterized by comprising a sampling assembly, a buffer part and a gas pipeline; a buffer cavity is arranged in the buffer piece; two ends of the buffer cavity are respectively communicated with the gas pipeline and the sampling assembly; a throttle valve is arranged on the air pipeline; and the sampling assembly is provided with a balancing weight.

2. The differential pressure principle-based floc in-situ collection device according to claim 1, wherein the sampling assembly comprises a sampling tube and a sampling nozzle bonded to the end of the sampling tube.

3. The floc in-situ collection device based on the pressure difference principle as claimed in claim 2, wherein the sampling nozzle is a conical tube, the inner diameter of the large end of the conical tube is equal to the drift diameter of the sampling tube, and the small end of the conical tube is subjected to fillet polishing treatment.

4. The floc in-situ collection device based on the pressure difference principle as claimed in claim 2, wherein the cross-sectional area of the buffer chamber is 1.2-1.5 times of the flow area of the sampling tube.

5. The floc in-situ collection device based on the pressure difference principle as claimed in claim 1, wherein the buffer member is a hollow cylinder with openings at two ends, and the two openings are respectively connected with a sampling assembly and a gas pipeline; the outside of bolster links firmly the mounting disc, the mounting disc is close to be equipped with the telescopic link on the terminal surface of trachea line, the axis of telescopic link with the axis of bolster is parallel.

6. The floc in-situ collection device based on the pressure difference principle as claimed in claim 1, wherein the sampling assembly and the buffer are made of light-permeable material.

7. The differential pressure principle-based floc in-situ collection device of claim 2, wherein the weight block is detachably connected to the sampling tube.

8. The pressure differential principle-based floc in-situ collection device according to claim 7, wherein the gas line is connected to the buffer by a quick-connect plug.

9. The differential pressure principle-based floc in-situ collection device according to claim 8, wherein the gas line is a PU tube.

10. The floc in-situ collection device based on the pressure difference principle as claimed in claim 2, wherein the drift diameter of the sampling tube and the inner diameter of the large end of the sampling nozzle are both 3-5 mm.