Curing agent stirring system and curing agent stirring method

Abstract

A curing agent stirring system comprises: a connecting rod assembly, the connecting rod assembly comprising an upper support and a lower support mounted on the screw rod, a connecting rod retracting arm, a connecting rod retracting arm connecting the upper support and the lower support, and a mounting block connected to the connecting rod retracting arm and used for mounting a workpiece to be moved; wherein the connecting rod retracting arm expands as the distance between the upper support and the lower support approaches, and contracts as the distance between the upper support and the lower support increases; a stirring container, a container for holding a slurry to be stirred; a stirring assembly, placed in the stirring container, and used for stirring the mixed slurry in the stirring container; a conveying assembly, the conveying assembly comprising a conveying pipe for conveying a curing agent into the stirring container, the conveying pipe being mounted on the mounting block.

Description

Technical Field

[0001] The invention belongs to the field of mobile workpiece devices, and in particular relates to a curing agent stirring system and a curing agent stirring method. Background Art

[0002] The gel casting process is a new ceramic molding technology invented by Oak Ridge National Laboratory in the United States in the early 1990s by combining traditional ceramic molding technology and polymer technology. Usually, an acrylamide water-based gel system is used, and its basic composition is a mixed liquid formed by an organic monomer-acrylamide (C2H3CONH2, AM) and an appropriate amount of cross-linking agent N,N'-methylenebisacrylamide (C2H3CONH2CH2, MBAM). A cross-linking reaction occurs under the action of a catalyst N,N,N',N'-tetramethylethylenediamine (TEMED) and a curing agent ammonium persulfate ((NH4)2S2O8, APS): the curing agent APS decomposes to form primary free radicals and becomes monomer free radicals with the monomer. The reaction activation energy is low, and the generated primary free radicals quickly generate monomer free radicals, but there are many side reactions in the initiation reaction stage, which consume the curing agent and make the curing agent inefficient. Primary free radicals will also quickly react with some inhibitory substances and lose their reactivity. Oxygen is an obvious inhibitor. Oxygen and free radicals generate relatively inactive peroxyl radicals. The peroxyl radicals themselves combine with other free radicals and terminate, and can no longer trigger a gel reaction to form a three-dimensional network structure (oxygen inhibition effect).

[0003] If oxygen in the air is wrapped into the slurry, it will affect the solidification of the surrounding slurry and pores, thus causing defects in the green body after solidification. Therefore, the chain initiation reaction is the key to controlling the entire polymerization reaction and is also the main factor affecting the molecular weight of the polymerization system. Especially for gel casting slurry, when the slurry viscosity is greater than 5Pa•S, the slurry fluidity is poor, so there are the following problems: during the curing agent addition process, due to the high viscosity of the slurry, it cannot be dispersed into the entire slurry in time, resulting in excessive or insufficient concentration in the local area, resulting in inconsistent slurry gel, which causes defects in the green body after solidification, seriously affecting the green body quality.

[0004] Furthermore, in the prior art, when adding curing agent, there is no movable component that can adjust the position of the curing agent dripping into the stirring container, so that when stirring the curing agent, the curing agent dripping into the stirring container is unevenly distributed, resulting in uneven stirring. Summary of the invention

[0005] The present invention is to solve one of the above problems; provide a curing agent stirring system, which is achieved by the following methods:

[0006] A curing agent stirring system comprises: a connecting rod assembly, the connecting rod assembly comprising an upper support and a lower support mounted on the screw rod, a connecting rod retracting arm, a connecting rod retracting arm connecting the upper support and the lower support, and a mounting block connected to the connecting rod retracting arm and used for mounting a workpiece to be moved;

[0007] Among them, the connecting rod retractable arm expands as the distance between the upper support and the lower support approaches, and contracts as the distance between the upper support and the lower support increases; a stirring container, a container for holding the liquid to be stirred; a stirring assembly, placed in the stirring container, for stirring the mixed liquid in the stirring container; a conveying assembly, the conveying assembly includes a conveying pipe for conveying the curing agent to the stirring container, and the conveying pipe is installed on the mounting block.

[0008] Preferably, the stirring assembly includes a stirring paddle, a rotating rod, a power supply motor, and a rotating motor; the rotating rod is provided with a rotating motor, and the rotating motor is connected to the power supply motor through the inner cavity of the guide rod; the rotating rod drives the stirring paddle to rotate; the stirring paddle is used to stir and mix the liquid in the stirring container.

[0009] Preferably, the stirring paddle comprises at least two rectangular plates which are not parallel to each other.

[0010] Preferably, the stirring paddle is a lantern-shaped wire mesh.

[0011] Preferably, the delivery assembly further includes a curing agent metering pump and a guide tube connecting the delivery pipe and the curing agent metering pump.

[0012] Preferably, at least two guide tubes are provided, the number of the delivery tubes is adapted to the number of the guide rods, and the number of the connecting rod retracting arms is adapted to the number of the delivery tubes.

[0013] Preferably, it also includes a waste collection box whose maximum radius is smaller than the radius of the stirring container, the waste collection box is mounted on the guide rod and arranged directly above the stirring container, and the waste collection box is used to collect excess curing agent; when the connecting rod retracting arm expands outward, the mounting block drives the conveying pipe away from the screw rod, exceeding the collection range of the waste collection box so that the curing agent falls into the stirring container.

[0014] Preferably, the waste integration box is a cylinder with no top and a bottom.

[0015] Preferably, the connecting rod assembly further comprises a guide rod, and the screw rod is sleeved on the guide rod and can slide on the guide rod;

[0016] The two ends of the screw rod are threadedly connected with a fixing nut and a pushing nut.

[0017] A curing agent stirring method, comprising the above-mentioned curing agent stirring system, the operating steps comprising:

[0018] S1 starts the curing agent quantitative pump and starts the stirring component at the same time;

[0019] S2: the curing agent metering pump conveys the curing agent to the delivery pipe through the guide pipe until the gas in the delivery pipe is completely exhausted, and the waste integration box receives the discharged curing agent;

[0020] S3: the expansion and contraction moving device moves the conveying pipe away from above the waste integration box, and the position of the conveying pipe does not exceed the top of the stirring container;

[0021] S4: the delivery pipe delivers the curing agent to the stirring container;

[0022] After the stirring is completed, the stirring component and the curing agent metering pump are stopped;

[0023] S6: the expansion and contraction moving device moves the conveying pipe to the position directly above the waste integration box.

[0024] Beneficial effects: The system can ensure that the curing agent can be added continuously and quantitatively during the curing agent addition process. By adjusting the position of the delivery pipe, it is possible to avoid the oxygen in the air from being drawn into the high-viscosity slurry during the curing agent addition process. The device can select the best addition position according to the different sizes of slurry stirring containers to ensure uniform dispersion of the curing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of a connecting rod assembly according to an embodiment of the present invention;

[0026] Figure 2 is an exploded view of an embodiment of the present invention;

[0027] Figure 3 It is an enlarged diagram of the screw rod connection relationship of an embodiment of the present invention;

[0028] Figure 4 It is a three-dimensional diagram of an embodiment of the present invention. Description of the drawings:

[0030] Guide rod 1; connecting rod assembly 2; upper support 21; lower support 22; connecting rod retracting arm 23; upper connecting rod 231; lower connecting rod 232; connecting rod extending end 233; hinged rod 2331; connecting rod 2332; mounting block 24; fixing nut 3; pushing nut 4; screw rod 5; upper thread 51; fixing groove 511; lower thread 52; pre-tightening groove 521; stirring container 6; stirring assembly 7; stirring paddle 71; rotating rod 72; power supply motor 73; conveying assembly 8; conveying pipe 81; curing agent metering pump 82; guide pipe 83; waste integrated box 9. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] like Figure 1-Figure 4 As shown, an expansion and contraction moving device includes a guide rod 1, a screw rod 5, a connecting rod assembly 2, a fixing nut 3, a pushing nut 4, and a connecting rod assembly 2, wherein the connecting rod assembly 2 includes an upper support 21 and a lower support 22 installed on the screw rod 5, a connecting rod contraction arm 23, the connecting rod contraction arm 23 connecting the upper support 21 and the lower support 22, and a mounting block 24 connected to the connecting rod contraction arm 23 and used for mounting a workpiece to be moved;

[0033] The connecting rod retractable arm 23 expands as the distance between the upper support 21 and the lower support 22 becomes closer, and contracts as the distance between the upper support 21 and the lower support 22 becomes larger.

[0034] Among them, the screw rod 5 is sleeved on the guide rod 1 and can slide on the guide rod 1; the connecting rod assembly 2 includes an upper support 21 and a lower support 22 installed on the screw rod 5, a connecting rod retraction arm 23, and a mounting block 24 connected to the protruding end of the connecting rod retraction arm 23 and used to install the workpiece to be moved; the fixing nut 3 is used to fix the position of the screw rod 5 on the guide rod 1; the pushing nut 4 is adapted to the screw rod 5; the connecting rod retraction arm 23 includes an upper connecting rod 231 hinged with the upper support 21, a lower connecting rod 232 hinged with the lower support 22, and a connecting rod protruding end 233 hinged with the upper connecting rod 231 and the lower connecting rod 232 respectively; the pushing nut 4 pushes the lower support 22 to slide downward on the screw rod 5 so that the connecting rod protruding end 233 of the connecting rod retraction arm 23 retracts inward, and the pushing nut 4 slides upward on the screw rod 5 so that the connecting rod protruding end 233 of the connecting rod retraction arm 23 expands outward.

[0035] The specific structural relationship between the screw rod 5, the connecting rod assembly 2, the fixing nut 3 and the pushing nut 4 is as follows: the fixing nut 3 fastens the screw rod 5 and the guide rod 1 by rotating on the screw rod 5, that is, the fixing nut 3 rotates on the screw rod 5 to press the rod wall of the screw rod 5 toward the guide rod 1 until the two are pressed tightly, and at this time, the friction between the screw rod 5 and the guide rod 1 is sufficient to fix the screw rod 5 on the guide rod 1. After the fixing nut 3 fixes the screw rod 5, the pushing nut 4 is rotated. In order to enable the pushing nut 4 to push the lower support 22 upward, the pushing nut 4 is arranged below the lower support 22. Since the lower support 22 is sleeved and installed on the screw rod 5, the sleeve installation described here can be that the inner diameter of the lower support 22 is slightly larger than the diameter of the screw rod 5 or the position of the screw rod 5 for sleeved lower support 22 is a smooth wall surface, so when the pushing nut 4 rotates upward, the lower support 22 is pushed to move upward by a moving distance. The lower connecting rod 232 supports the entire connecting rod retractable arm 23 under the trend of gravity, that is, the hinged end of the lower connecting rod 232 and the lower support 22 and the other end gradually approach the horizontal direction during the gradual rise of the lower support 22. The lower connecting rod 232 supports the entire connecting rod retractable arm 23 to expand outward, and the connecting rod 2332 also moves outward and the rotation direction of the connecting rod 2332 also gradually approaches the horizontal direction and rotates slowly. The pushing nut 4 rotates downward, and when the lower support 22 rotates downward to the limit, the upward limit and the downward limit mentioned here both refer to the situation where the pushing nut 4 cannot be separated from the thread on the screw rod 5. For the connecting rod assembly 2 controlled by the lower support 22 for contraction and expansion, the connecting rod retraction arm 23 is the main working component. When the lower support 22 moves downward to the limit, the upper connecting rod 231 presses downward and gathers towards the screw rod 5, and the lower connecting rod 232 retracts inward and downward. The inward here refers to the direction of the screw rod 5, and the downward here refers to the hinged end of the lower connecting rod 232 and the lower support 22 being higher than the other end of the lower connecting rod 232. At this time, the connecting rod retraction arm 23 of the expansion and contraction moving device is in a retracted state. Since the lower connecting rod 232 retracts inward and does not support the connecting rod retraction arm 23, the connecting rod protruding end 233 is also in a retracted state, that is, the connecting end of the connecting rod protruding end 233 and the mounting block 24 is lower than the other end of the connecting rod protruding end 233.

[0036] In a preferred embodiment, an upper thread 51 adapted to the fixing nut 3 is provided at the upper end of the screw rod 5, a lower thread 52 adapted to the pushing nut 4 is provided at the lower end of the screw rod 5, and the middle portion of the screw rod 5 is a smooth rod wall for the sliding of the lower support 22.

[0037] In a preferred embodiment, a longitudinally arranged fixing groove 511 is opened on the rod wall of the upper thread 51 , and the fixing nut 3 reinforces the installation of the screw rod 5 and the guide rod 1 through the fixing groove 511 .

[0038] In a preferred embodiment, a longitudinally arranged pre-tightening groove 521 is opened on the rod wall of the lower thread 52 , and the push nut 4 is connected to the screw rod 5 by reinforcing the connection between the push nut 4 and the screw rod 5 through the pre-tightening groove 521 .

[0039] In a preferred embodiment, the number of the connecting rod retractable arms 23 is at least two groups and they are evenly arranged around the screw rod 5. The connecting rod retractable arms 23 can be three groups or four groups, and different numbers can be set according to needs.

[0040] In a preferred embodiment, the connecting rod protruding end 233 is a connecting rod 2332 hinged to the upper connecting rod 231 and the lower connecting rod 232 at one end, and connected to the mounting block 24 at the other end, that is, the connecting rod protruding end 233 is a rod at this time.

[0041] In a preferred embodiment, the connecting rod extension end 233 includes a hinge rod 2331 and a connecting rod 2332; one end of the hinge rod 2331 is hinged to the upper connecting rod 231, and the other end is hinged to the lower connecting rod 232; the connecting rod 2332 is respectively arranged at the hinge end of the hinge rod 2331 and is hinged to the hinge rod 2331. This embodiment is provided for configuring two mounting blocks 24 for one connecting rod retractable arm 23.

[0042] In a preferred embodiment, the length of the upper connecting rod 231 is longer than that of the lower connecting rod 232. In this case, the upper connecting rod 231 can better retract and gather the lower connecting rod 232 inward.

[0043] In a preferred embodiment, the mounting block 24 is provided with a mounting hole for mounting a workpiece.

[0044] In a preferred embodiment, the guide rod 1 is hollow inside.

[0045] A curing agent stirring system includes the above-mentioned expansion and contraction movable device, and also includes a stirring container 6, which is located directly below the above-mentioned expansion and contraction movable device and is a container for holding the liquid to be stirred; a stirring component 7, wherein the stirring component 7 is used to stir the mixed liquid in the stirring container 6; and a conveying component 8, wherein the conveying component 8 includes a conveying pipe 81 for conveying the curing agent to the stirring container 6, and the conveying pipe 81 is installed on the mounting block 24.

[0046] In use of the device, the gas in the guide tube 83 is first discharged through the conveying component 8, and a certain amount of curing agent is discharged at the same time, so as to prevent the curing agent that contacts the air from deteriorating and entering the stirring container. Then, the expansion and contraction moving device moves the guide tube 83 a certain distance, which is away from the top of the waste integration box 9 but still above the stirring container 6. Then, the stirring component 7 is started to start stirring the mixture in the stirring container 6. Of course, at the same time, if it is found that the position of the curing agent input in the stirring container is uneven, the position of the guide tube 83 can still be adjusted by adjusting the expansion and contraction moving device.

[0047] In a preferred embodiment, the stirring assembly 7 includes a stirring paddle 71, a rotating rod 72, a power supply motor 73, and a rotating motor; a rotating motor is provided in the rotating rod 72, and the rotating motor is connected to the power supply motor 73 through the inner cavity of the guide rod 1; the rotating rod 72 drives the stirring paddle 71 to rotate; the stirring paddle 71 is used to stir and mix the liquid in the stirring container 6.

[0048] In a preferred embodiment, the stirring paddle 71 includes at least two rectangular plates that are not parallel to each other.

[0049] In a preferred embodiment, the stirring paddle 71 is a lantern-shaped wire mesh.

[0050] In a preferred embodiment, the delivery assembly 8 further includes a curing agent metering pump 82 and a guide tube 83 connecting the delivery pipe 81 and the curing agent metering pump 82 .

[0051] In a preferred embodiment, at least two guide tubes 83 are provided, the number of the delivery tubes 81 matches the number of the guide rods 1 , and the number of the connecting rod retracting arms 23 matches the number of the delivery tubes 81 .

[0052] In a preferred embodiment, the system further includes a waste collection box 9 having a maximum diameter smaller than that of the stirring container 6, wherein the waste collection box 9 is mounted on the guide rod 1 and is disposed directly above the stirring container 6, and the waste collection box 9 is used to collect waste discharged when the transmission pipe retracts inwardly; when the connecting rod retraction arm 23 expands outwardly, the mounting block 24 drives the transmission pipe 81 to move from directly above the waste collection box 9 to directly above the stirring container 6.

[0053] In a preferred embodiment, the waste collection box 9 is cylindrical.

[0054] The working steps of this curing agent mixing system are:

[0055] S1 starts the curing agent quantitative pump and starts the stirring component at the same time;

[0056] S2: the curing agent metering pump conveys the curing agent to the delivery pipe through the guide pipe until the gas in the delivery pipe is completely exhausted, and the waste integration box receives the discharged curing agent;

[0057] S3: the expansion and contraction moving device moves the conveying pipe away from above the waste integration box, and the position of the conveying pipe does not exceed the top of the stirring container;

[0058] S4: the delivery pipe delivers the curing agent to the stirring container;

[0059] After the stirring is completed, the stirring component and the curing agent metering pump are stopped;

[0060] S6: the expansion and contraction moving device moves the conveying pipe to the position directly above the waste integration box.

[0061] Specifically: in order to prevent the curing agent from entering the stirring container 6 after reacting with the air, when the connecting rod retractable arm 23 is not expanded, that is, when the connecting rod retractable arm 23 is retracted, the waste integration box 9 directly below the delivery pipe 81 discharges a portion of the curing agent in the pipe, so that the curing agent that has not been in contact with the air in the pipe for a long time is discharged, and then the push nut 4 is rotated upward, and the lower connecting rod 232 gradually approaches the horizontal so that the entire connecting rod retractable arm 23 pushes the delivery pipe 81 installed on the mounting block 24 to gradually move away from the screw rod 5, that is, from directly above the waste integration box 9 to directly above the stirring container 6, and then adjust the push nut 4 to a certain position, or repeatedly adjust the push nut 4 according to the stirring situation so that the delivery pipe 81 evenly transports the curing agent to the stirring container 6, and at the same time, turn on the power supply motor 73 to allow the stirring paddle 71 to simultaneously stir the curing agent and other liquids in the stirring container 6 to merge.

[0062] The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments can be combined with each other to form new embodiments. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modification or equivalent replacement that does not deviate from the spirit and scope of the present invention shall be included in the scope of the technical solutions of the present invention.

Claims

1. A curing agent stirring system, characterized in that: include: An expansion and contraction moving device, the expansion and contraction moving device comprising a guide rod (1), a screw rod (5), a connecting rod assembly (2), a fixing nut (3) threadedly connected to one end of the screw rod (5), and a pushing nut (4) threadedly connected to the other end of the screw rod (5), the screw rod (5) being sleeved on the guide rod (1) and being slidable on the guide rod (1), the connecting rod assembly (2) comprising an upper support (21) and a lower support (22) mounted on the screw rod (5), a connecting rod contraction arm (23) connecting the upper support (21) and the lower support (22), and a mounting block (24) connected to the connecting rod contraction arm (23) and used for mounting a workpiece to be moved; wherein the connecting rod contraction arm (23) expands as the distance between the upper support (21) and the lower support (22) approaches, and contracts as the distance between the upper support (21) and the lower support (22) increases; A stirring container (6), a container for containing the liquid to be stirred; A stirring component (7), placed in the stirring container (6), and used to stir the mixed liquid in the stirring container (6); A conveying assembly (8), the conveying assembly (8) comprising a conveying pipe (81) for conveying a curing agent into the stirring container (6), the conveying pipe (81) being mounted on the mounting block (24); The curing agent stirring system further comprises a waste collection box (9) having a maximum radius smaller than the radius of the stirring container (6); the waste collection box (9) is mounted on the guide rod (1) and arranged directly above the stirring container (6); the waste collection box (9) is used to collect excess curing agent; when the connecting rod retracting arm (23) expands outward, the mounting block (24) drives the conveying pipe (81) away from the screw rod (5), exceeding the collection range of the waste collection box (9) so that the curing agent falls into the stirring container (6).

2. The curing agent stirring system according to claim 1, characterized in that: The stirring assembly (7) comprises a stirring paddle (71), a rotating rod (72), a power supply motor (73), and a rotating motor; the rotating rod (72) is provided with a rotating motor, and the rotating motor is connected to the power supply motor (73) via the inner cavity of the guide rod (1); the rotating rod (72) drives the stirring paddle (71) to rotate; the stirring paddle (71) is used to stir and mix the liquid in the stirring container (6).

3. The curing agent stirring system according to claim 2, characterized in that: The stirring paddle (71) comprises at least two rectangular plates that are not parallel to each other.

4. The curing agent stirring system according to claim 2, characterized in that: The stirring paddle (71) is a lantern-shaped wire mesh.

5. The curing agent stirring system according to claim 2, characterized in that: The delivery assembly (8) further comprises a curing agent metering pump (82) and a guide tube (83) connecting the delivery tube (81) and the curing agent metering pump (82).

6. The curing agent stirring system according to claim 5, characterized in that: At least two guide tubes (83) are provided, the number of the delivery tubes (81) matches the number of the guide rods (1), and the number of the connecting rod retractable arms (23) matches the number of the delivery tubes (81).

7. The curing agent stirring system according to claim 1, characterized in that: The waste integration box (9) is a cylinder without a top and with a bottom.

8. A curing agent stirring method, characterized in that: The curing agent stirring system according to claim 5 or 6, wherein the operation steps include: S1 starts the curing agent quantitative pump and starts the stirring component at the same time; S2: the curing agent metering pump conveys the curing agent to the delivery pipe through the guide pipe until the gas in the delivery pipe is completely exhausted, and the waste integration box receives the discharged curing agent; S3: using an expansion and contraction moving device to move the conveying pipe away from above the waste integration box, so that the position of the conveying pipe does not exceed the top of the stirring container; S4: the delivery pipe delivers the curing agent to the stirring container; After the stirring is completed, the stirring component and the curing agent metering pump are stopped; S6 utilizes the expansion and contraction moving device to move the conveying pipe to just above the waste integration box.

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