Pneumatically-driven anti-blocking viscous aid titration device and method

Abstract

The invention relates to the field of titration experiments, in particular to an air pressure driven anti-blocking viscous aid titration device and method. The pneumatic-driven anti-blocking viscous aid titration device comprises a burette, a sealing cover and the like, and the burette is screwed with a sealing cover through threads. Through inert gas constant-pressure driving, viscous resistance is overcome, pipe wall adhesion is inhibited through gas pressure, the problem of blockage is avoided during continuous titration of an auxiliary agent, and compared with traditional gravity titration, the flow velocity fluctuation rate of the auxiliary agent is greatly reduced, so that the experiment batch difference is effectively reduced, and the experiment efficiency is improved. It is guaranteed that the auxiliaries stably flow out in the state of filling the outflow channel all the time under the condition of any discharging opening, and the problems that under the condition that an existing valve is small in opening, the auxiliaries flowing out by means of gravity cannot flow out in the state of filling the outflow channel, and then part of the auxiliaries adhere to the inner wall of the channel in the outflow process and cannot flow out in time are solved. And the flow rate fluctuation rate of the auxiliary agent is large.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of titration experiment, in particular to a gas pressure driven anti-blocking viscous auxiliary agent titration device and method. BACKGROUND

[0002] In the prior art, during the experiment in the laboratory, a burette is used. The auxiliary agent in the existing burette relies on gravity, and the flow rate is controlled by a valve. For viscous auxiliary agents, due to the cohesive force, the flow rate significantly decreases as the liquid level drops, and it is easy to drop slower and slower, and stagnation is easy to form at the valve, which leads to crystallization or agglomeration blockage, and even causes the pipeline to be blocked and the titration to be stopped. The existing equipment uses mechanical extrusion or magnetic stirring to solve the above problems, but there are problems such as complex structure, difficult cleaning, easy pollution of the auxiliary agent, and inability to provide a constant driving force. SUMMARY

[0003] In order to overcome the shortcomings of the existing titration equipment, for viscous auxiliary agents, due to the cohesive force, the flow rate significantly decreases as the liquid level drops, and it is easy to drop slower and slower, and stagnation is easy to form at the valve, which leads to crystallization or agglomeration blockage, and even causes the pipeline to be blocked and the titration to be stopped. The present application provides a gas pressure driven anti-blocking viscous auxiliary agent titration device and method.

[0004] The technical scheme is as follows: a gas pressure driven anti-blocking viscous auxiliary agent titration device, comprising a burette and a sealing cover; the sealing cover is screwed to the burette; further comprising a gas inlet pipe, an exhaust pipe, a control valve and a discharge control mechanism; the sealing cover is connected with the gas inlet pipe; the sealing cover is provided with the exhaust pipe; one end of the exhaust pipe is communicated with the burette, and the other end of the exhaust pipe is communicated with the control valve; the burette is connected with the discharge control mechanism for controlling the discharge amount.

[0005] As a preferred, the burette is composed of a primary pipe, a secondary pipe and a tertiary pipe; the primary pipe is screwed to the sealing cover; the secondary pipe is screwed to the primary pipe; the tertiary pipe is screwed to the secondary pipe; the tertiary pipe is connected with the discharge control mechanism; by setting the burette as three detachable parts of the primary pipe, the secondary pipe and the tertiary pipe, the storage capacity of the burette is improved, and the inner wall of the burette is convenient to clean after use.

[0006] As a preferred, further comprising a sealing enhancement mechanism; the sealing cover, the secondary pipe and the tertiary pipe are each connected with a sealing enhancement mechanism for enhancing the sealing effect.

[0007] As a preferred, the sealing enhancement mechanism on the sealing cover is composed of a sealing ring and a gas guide pipe; the sealing ring is sleeved on the sealing cover; the outer ring surface of the sealing ring is attached to the inner wall of the primary pipe; the sealing ring is provided with a hollow structure, and the sealing ring is made of wear-resistant elastic rubber material; the sealing ring is communicated with the gas guide pipe; the gas guide pipe is fixed to the sealing cover.

[0008] As preferred, the discharging control mechanism is composed of the sealing piece, the connecting block, the bidirectional screw rod, the fixing frame and the knob; the three-stage pipe is provided with two valve parts; each of the two valve parts is slidably connected with a sealing piece; the two sealing pieces are in contact with each other; the sealing pieces are slidably connected with the three-stage pipe; each of the two sealing pieces is fixedly connected with a connecting block; the two connecting blocks are jointly screwed with the bidirectional screw rod; each of the two valve parts is fixedly connected with a fixing frame; each of the two fixing frames is rotationally connected with a rotating part of the bidirectional screw rod; each of the two rotating parts of the bidirectional screw rod is fixedly connected with a knob.

[0009] As preferred, the two fixing frames are each provided with a scale and numbers for indicating the rotation angle of the knob, the knob is provided with a pointing groove pointing to the scale, and the rotating parts of the bidirectional screw rod and the fixing frames are provided as damping type rotationally connected, so as to facilitate the operator to adjust the rotation angle of the knob.

[0010] As preferred, the application further comprises the connecting rods and the sliding rods; each of the two sealing pieces is fixedly connected with a connecting rod; each of the two connecting rods is fixedly connected with a sliding rod; the two sliding rods are slidably connected with the three-stage pipe; each of the two sliding rods is fixedly connected with a sealing piece.

[0011] As preferred, the application further comprises the sealing frames; each of the two sealing pieces is provided with a sealing frame for strengthening the sealing effect.

[0012] As preferred, the application further comprises the multi-branch pipe frames and the inflating mechanisms; the two sealing frames are each provided as a hollow structure and are each provided as a wear-resistant elastic material; each of the two sealing pieces is provided with a multi-branch pipe frame; each of the two multi-branch pipe frames is in communication with a sealing frame; each of the two sealing pieces is connected with an inflating mechanism for inflating the sealing frame; each of the two multi-branch pipe frames is connected with an inflating mechanism; each of the two inflating mechanisms is connected with a fixing frame.

[0013] As preferred, the application further comprises a viscous auxiliary agent titration method suitable for a kind of air pressure driven anti-blocking, comprising the following steps: step one, auxiliary agent is injected into titration tube; step two, inert gas is transported to preset constant pressure value in titration tube by constant pressure gas supply system outside gas delivery pipe; step three, the fixed opening of discharging control mechanism is adjusted, and the auxiliary agent continuously and stably flows out under constant air pressure.

[0014] The application has the following beneficial effects: 1. Driven by inert gas constant pressure, overcome viscous resistance, and suppress the adhesion of the pipe wall through gas pressure, so that the auxiliary agent can be continuously titrated to avoid the problem of blockage, and compared with the traditional gravity titration, the auxiliary agent flow rate fluctuation rate is greatly reduced, thereby effectively reducing the experimental batch difference, by setting the titration tube as a detachable three-part first-stage pipe, second-stage pipe and three-stage pipe, the storage capacity of the titration tube is improved, and the inner wall of the titration tube is convenient to clean after use.

[0015] 2. When cleaning is needed, adjust the discharge control mechanism to the maximum opening, so that the two sealing pieces and the inner wall of the third-stage pipe are in the same plane, facilitating the cleaning of the inner wall of the third-stage pipe and the sealing pieces, avoiding the existence of cleaning dead angles, thus avoiding the formation of a stagnant state of viscous additives in the third-stage pipe after work, leading to crystallization or agglomeration blockage.

[0016] 3. Ensure that the additives always flow out in a full-flowing channel state at any discharge opening, avoiding the problem that when the existing valve opening is small, the additives flowing out by gravity cannot flow out in a full-flowing channel state, and then part of the additives adhere to the inner wall of the channel and do not flow out in time, leading to a large flow rate fluctuation rate of the additives. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a schematic diagram of the internal structure of the burette of the present application; Figure 3 is an enlarged view of area A of the present application; Figure 4 is an enlarged view of area B of the present application; Figure 5 is an enlarged view of area C of the present application; Figure 6 is an enlarged view of area D of the present application; Figure 7 is a schematic diagram of the three-dimensional structure of the discharge control mechanism of the present application; Figure 8 is a display diagram of the maximum opening of the discharge control mechanism of the present application; Figure 9 is a schematic diagram of the three-dimensional structure of the combination of the bidirectional screw rod, the fixed frame and the knob of the present application; Figure 10 is a schematic diagram of the three-dimensional structure of the combination of the sealing piece and the sealing frame of the present application; Figure 11 is a schematic diagram of the three-dimensional structure of the combination of the sealing frame, the multi-branch pipe frame and the air storage bag of the present application.

[0018] BRIEF DESCRIPTION OF DRAWINGS: 1-burette, 2-sealing cover, 101-first-stage pipe, 102-second-stage pipe, 103-third-stage pipe, 1031-valve part, 3-air supply pipe, 4-air exhaust pipe, 5-control valve, 6-sealing ring, 7-air guide pipe, 8-sealing piece, 9-connection block, 10-bidirectional screw rod, 11-fixed frame, 12-knob, 13-connection rod, 14-sliding rod, 15-sealing frame, 16-multi-branch pipe frame, 17-air storage bag, 18-mounting cylinder, 19-threaded rod. DETAILED DESCRIPTION

[0019] The following description is only the preferred embodiment of the present application, and does not limit the protection scope of the present application.

[0020] Embodiment 1 A gas pressure driven anti-blocking viscous additive titration device, according to Figures 1-5 As shown, it comprises a titration tube 1 and a sealing cover 2; the titration tube 1 is screwed with the sealing cover 2; It also comprises a gas inlet pipe 3, an exhaust pipe 4, a control valve 5 and a discharge control mechanism; the sealing cover 2 is communicated with the gas inlet pipe 3; the sealing cover 2 is provided with the exhaust pipe 4 which is fixedly connected; one end of the exhaust pipe 4 is communicated with the titration tube 1, and the other end of the exhaust pipe 4 is communicated with the control valve 5; the titration tube 1 is connected with the discharge control mechanism at the lower part.

[0021] The titration tube 1 is composed of a primary tube 101, a secondary tube 102 and a tertiary tube 103; the primary tube 101 is screwed with the sealing cover 2; the secondary tube 102 is screwed with the primary tube 101; the tertiary tube 103 is screwed with the secondary tube 102; the tertiary tube 103 is connected with the discharge control mechanism.

[0022] It also comprises a sealing reinforcing mechanism; the sealing cover 2, the secondary tube 102 and the tertiary tube 103 are each connected with a sealing reinforcing mechanism.

[0023] The sealing reinforcing mechanism on the sealing cover 2 is composed of a sealing ring 6 and a gas guide pipe 7; the sealing cover 2 is sleeved with the sealing ring 6; the outer ring surface of the sealing ring 6 is attached to the inner wall of the primary tube 101; the sealing ring 6 is provided with a hollow structure, and the sealing ring 6 is made of wear-resistant elastic rubber material; the sealing ring 6 is communicated with the gas guide pipe 7; the gas guide pipe 7 is fixedly connected with the sealing cover 2.

[0024] The inner wall of the titration tube 1 is coated with a polytetrafluoroethylene anti-sticking coating to reduce the adhesion of the additive to the inner wall of the titration tube 1.

[0025] In use, the sealing cap 2 is screwed off the burette 1, the additive is injected into the burette 1, and then the sealing cap 2 is screwed back onto the burette 1. The inert gas is delivered into the burette 1 through the gas delivery pipe 3 connected to the constant-pressure gas supply system. The gas guide pipes 7 of all the sealing enhancement mechanisms are connected to the constant-pressure gas supply system through the guide pipes, so that the air pressure in the sealing ring 6 is increased, the sealing performance of the position where the sealing ring 6 is located is enhanced, and the overall sealing performance of the device is improved. At the same time, the control valve 5 is opened to discharge the air in the burette 1, so that the burette 1 is filled with inert gas, and the additive is titrated in an inert environment, preventing the additive from oxidizing and solidifying and avoiding blockage, thereby ensuring the efficiency and accuracy of the experiment. Then, the control valve 5 is connected to the pressure monitoring unit through the guide pipe, and the pressure monitoring unit displays the air pressure in the burette 1 in real time. When the inert gas in the burette 1 reaches the preset air pressure value, the delivery of the inert gas is stopped. After waiting for a preset time, if the pressure monitoring unit shows that the air pressure in the burette 1 has not changed, it means that the overall device has no sealing problem and can normally titrate. Otherwise, it means that there is a sealing problem, which needs to be checked before titration, so as to avoid wasting time and resources due to invalid experiments caused by sealing problems. After determining that the titration can be normally performed, the discharge control mechanism is adjusted to the preset opening degree, and the constant-pressure gas supply system continues to deliver constant-pressure inert gas into the burette 1, so that the additive continuously and stably flows out under constant air pressure. At this time, the flow rate is only related to the air pressure and the opening degree of the discharge control mechanism, so that the flow rate of the additive is linearly controllable, thereby overcoming the viscous resistance through the constant-pressure driving of the inert gas, and suppressing the adhesion to the pipe wall through the gas pressure, so that the additive is continuously titrated to avoid blockage. Compared with the traditional gravity titration, the flow rate fluctuation rate of the additive is greatly reduced, thereby effectively reducing the batch difference of the experiment. By setting the burette 1 as three detachable parts of the first-stage pipe 101, the second-stage pipe 102, and the third-stage pipe 103, the storage capacity of the burette 1 is improved, and the inner wall of the burette 1 is easy to clean after use.

[0026] Example 2 Based on example 1, as shown in Figures 1-11 , The discharge control mechanism is composed of a sealing element 8, a connecting block 9, a bidirectional screw rod 10, a fixed frame 11, and a knob 12. The third-stage pipe 103 is provided with two symmetrical valve parts 1031. Each of the two valve parts 1031 is slidably connected with a sealing element 8. The two sealing elements 8 are in contact with each other. The sealing element 8 is slidably connected with the third-stage pipe 103. Each of the two sealing elements 8 is fixedly connected with a connecting block 9. The two connecting blocks 9 are jointly screwed with the bidirectional screw rod 10. Each of the two valve parts 1031 is fixedly connected with a fixed frame 11. Each of the two fixed frames 11 is rotationally connected with a rotating part of the bidirectional screw rod 10. Each of the two rotating parts of the bidirectional screw rod 10 is fixedly connected with a knob 12.

[0027] The two fixed frames 11 are provided with scales and numbers for indicating the rotation angle of the knob 12, the knob 12 is provided with a pointing groove pointing to the scales, and the rotating part of the bidirectional screw rod 10 is in a damping type rotating connection with the fixed frame 11.

[0028] The connecting rods 13 and the sliding rods 14 are further included, one connecting rod 13 is fixedly connected to each of the two sealing members 8, one sliding rod 14 is fixedly connected to each of the two connecting rods 13, and the two sliding rods 14 are in a sliding connection with the three-stage pipe 103.

[0029] The sealing frames 15 are further included, and one sealing frame 15 is arranged on each of the two sealing members 8.

[0030] The multi-branch pipe frames 16 and the inflation mechanisms are further included, the two sealing frames 15 are in a hollow structure, and are made of wear-resistant elastic material, one multi-branch pipe frame 16 is arranged in each of the two sealing members 8, the two multi-branch pipe frames 16 are in communication with the sealing frame 15, one inflation mechanism is connected to each of the facing sides of the two sealing members 8, the two multi-branch pipe frames 16 are connected with the inflation mechanism, and the two inflation mechanisms are connected with the fixed frame 11.

[0031] The inflation mechanism is composed of the gas storage bag 17, the mounting cylinder 18 and the threaded rod 19, the mounting cylinder 18 is fixedly connected to the sealing member 8, the gas storage bag 17 is arranged in the mounting cylinder 18, the gas storage bag 17 is in communication with the multi-branch pipe frame 16, the mounting cylinder 18 is in a sliding connection with the fixed frame 11, the mounting cylinder 18 is screwed with the threaded rod 19, and the threaded rod 19 is in contact with the gas storage bag 17.

[0032] The method is suitable for a kind of gas pressure driven anti-blocking viscous auxiliary agent titration method, comprising the following steps: Step one, the auxiliary agent is injected into the titration tube 1; Step two, the inert gas is transported into the titration tube 1 by the constant pressure gas supply system connected to the gas pipe 3 to the preset constant pressure value; Step three, the discharge control mechanism is adjusted to fixed opening, and the auxiliary agent continuously and stably flows out under constant gas pressure.

[0033] The existing titration equipment valve has complex internal structure, and there are many cleaning dead angles, which leads to cleaning difficulty, and after work, viscous auxiliary agent is easy to form retention in the cleaning dead angle of the existing valve, which leads to crystallization or agglomeration blockage, seriously affects the next use, and then the two sealing members 8 are arranged to cooperate with the three-stage pipe 103 to control the discharge opening, when cleaning is needed after use, the discharge control mechanism is adjusted to maximum opening, such as Figure 8As shown, at this time, the two sealing pieces 8 are on the same plane with the inner wall of the three-stage pipe 103, facilitating cleaning of the inner wall of the three-stage pipe 103 and the sealing pieces 8, avoiding a cleaning dead angle and thus avoiding formation of a sticky additive in the three-stage pipe 103 after work, resulting in crystallization or agglomeration and blockage.

[0034] When the discharge control mechanism opening needs to be adjusted, the operator rotates the knob 12 to rotate the bidirectional screw rod 10, so that the two connecting blocks 9 drive the two sealing pieces 8 to slide in the valve part 1031, so that the two sealing pieces 8 are away from each other, and the sealing piece 8 drives the sliding rod 14 to slide in the three-stage pipe 103 through the connecting rod 13, so that the sealing piece 8 slides with balanced force, avoiding deformation of the sealing piece 8 due to uneven force. The fixed frame 11 is provided with a scale and a number for indicating the rotation angle of the knob 12, and the knob 12 is provided with a pointing groove pointing to the scale, and the rotating part of the bidirectional screw rod 10 is in a damping type rotating connection with the fixed frame 11, facilitating the operator to accurately adjust the rotation angle of the knob 12, so as to accurately adjust the opening between the two sealing pieces 8, and then accurately adjust the discharge opening. At the same time, the size of the channel formed between the two sealing pieces 8 and the inner wall of the three-stage pipe 103 changes synchronously with the discharge opening, and the size of the additive flowing out of the channel is always less than and at most equal to the caliber of the three-stage pipe 103, thereby ensuring that the additive always flows out in a full channel state under any discharge opening, avoiding the problem that the additive cannot flow out in a full channel state under the condition that the opening of the existing valve is small, and then adheres to the inner wall of the channel during the flowing process and does not flow out in time, resulting in a large flow rate fluctuation rate of the additive. After the opening adjustment of the discharge control mechanism is completed, the operator rotates the threaded rod 19 to press the gas storage bag 17, so that the gas in the gas storage bag 17 is introduced into the sealing frame 15 through the multi-branch pipe frame 16, so that the gas pressure in the sealing frame 15 is increased, thereby enhancing the sealing performance of the connection between the sealing piece 8 and the valve part 1031, thereby improving the sealing performance of the device, and ensuring that the additive continuously and stably flows out under constant gas pressure.

[0035] The above is only an embodiment of the present application and is not intended to limit the present application. Any equivalent replacement within the principles of the present application shall be included in the protection scope of the present application. The contents not described in detail in the present application are the prior art known to those skilled in the art.

Claims

1. A gas pressure driven anti-clogging viscous adjuvant titration device, characterized by, The utility model relates to a kind of titration burettes, including: Burette (1) and sealing cover (2), the burette (1) is threadedly connected with the sealing cover (2); Gas pipe (3) is communicated on sealing cover (2); Exhaust pipe (4) is fixed on sealing cover (2);The exhaust pipe (4) one end is communicated with burette (1), the other end is communicated with control valve (5); Discharge control mechanism is connected on burette (1).

2. The air pressure driven anti-blocking viscous adjuvant titration device according to claim 1, wherein, Burette (1) is composed of primary tube (101), secondary tube (102) and tertiary tube (103);The primary tube (101) is screwed with the sealing cover (2); The secondary tube (102) is screwed with the primary tube (101); The tertiary tube (103) is screwed with the secondary tube (102), and the tertiary tube (103) is connected with the discharge control mechanism.

3. The air pressure driven anti-blocking viscous adjuvant titration device according to claim 2, wherein, It also includes three sealing reinforcement mechanisms;Three sealing reinforcement mechanisms are respectively connected to sealing cover (2), secondary tube (102) and tertiary tube (103).

4. The gas pressure driven anti-blocking viscous adjuvant titration device according to claim 3, wherein, The sealing reinforcement mechanism on sealing cover (2) is composed of sealing ring (6) and gas guide pipe (7); The sealing ring (6) is sleeved on the sealing cover (2), and the outer ring surface of the sealing ring (6) is attached to the inner wall of the primary tube (101); The sealing ring (6) is provided as a hollow structure, and the sealing ring (6) is provided as a wear-resistant elastic rubber material, the gas guide pipe (7) is communicated with the sealing ring (6), and the gas guide pipe (7) is fixed to the sealing cover (2).

5. The air pressure driven anti-blocking viscous adjuvant titration device according to any one of claims 1-4, characterized in that, The tertiary tube (103) is provided with two valve parts (1031); The discharge control mechanism includes: Two sealing members (8) are respectively slidably connected to the two valve parts (1031), and the two sealing members (8) are in contact with each other; Two connecting blocks (9) are respectively fixed to the two sealing members (8); A bidirectional screw rod (10) is screwed to the two connecting blocks (9); Two fixed frames (11) are respectively fixed to the two valve parts (1031), and each of the two fixed frames (11) is rotatably connected to one rotating part of the bidirectional screw rod (10); Two knobs (12) are respectively fixed to the two rotating parts of the bidirectional screw rod (10).

6. The air pressure driven anti-blocking viscous adjuvant titration device according to claim 5, wherein, The two fixed frames (11) are each provided with a scale and a number for indicating the rotation angle of the two knobs (12), and the knob (12) is provided with a pointing groove pointing to the scale, and the rotating part of the bidirectional screw rod (10) is provided as a damping type rotary connection with the fixed frame (11), which facilitates the operator to adjust the rotation angle of the knob (12).

7. The air pressure driven anti-blocking viscous adjuvant titration device according to claim 5, wherein, It also includes two connecting rods (13) respectively fixed to the two sealing members (8) and two sliding rods (14) respectively fixed to the two connecting rods (13);Two sliding rods (14) are each slidably connected to the tertiary tube (103), and each of the two sliding rods (14) is fixed to one of the sealing members (8).

8. The air pressure driven anti-blocking viscous adjuvant titration device according to claim 5, wherein, It also includes two sealing frames (15) respectively provided on the two sealing members (8).

9. The air pressure driven anti-blocking viscous adjuvant titration device according to claim 8, wherein, Both of the two sealing frames (15) are provided as a hollow structure, and both of the two sealing frames (15) are provided as a wear-resistant elastic material. Two sealing frames (15) are respectively connected with a multi-branch frame (16), and the two multi-branch frames (16) are connected with the two sealing members (8) respectively; Two sealing members (8) are respectively connected with an inflation mechanism for inflating the two sealing frames (15), and the two inflation mechanisms are connected with a fixing frame (11) respectively.

10. A method for the pressure-driven, anti-blocking titration of viscous adjuvants, suitable for use in any of claims 1 to 9, characterized in that: The method comprises the following steps: Step one, injecting the auxiliary agent into the burette (1); Step two, delivering the inert gas into the burette (1) through the gas delivery pipe (3) and connecting the constant pressure gas supply system to the preset constant pressure value; Step three, adjusting the discharge control mechanism to a fixed opening, and the auxiliary agent continuously and stably flows out under the constant gas pressure.

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