Low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment

Abstract

The application discloses a low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment and belongs to the field of building materials. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment comprises a mixing mechanism and two liquid storage mechanisms. The mixing mechanism comprises a mixing cylinder, a switching disc sealingly and rotatably connected to the top of the mixing cylinder and a partition plate installed in the mixing cylinder and located at the lower end of the switching disc. The partition plate divides the mixing cylinder into two cavities. Two liquid inlet pipes are arranged at the upper end of the mixing cylinder. One liquid inlet pipe is connected with one liquid storage mechanism. Two liquid through holes are arranged on the switching disc. According to the scheme, the formaldehyde solution is mixed with the formaldehyde waste liquid, the low-concentration formaldehyde waste liquid is applied in the synchronous mortar modifier, harmless and resourceful utilization of the formaldehyde waste liquid is facilitated, the comprehensive cost of products is reduced, and the competitiveness of the products is improved.

Description

A production equipment for simultaneous production of low-concentration formaldehyde waste liquid and mortar modifier. Technical Field

[0001] This invention belongs to the field of building materials, and more specifically, relates to a production equipment for a low-concentration formaldehyde waste liquid synchronous mortar modifier. Background Technology

[0002] The mortar modifier is a binary copolymer grafted from an etherified anionic polymer and a polycarboxylate polymer. Through graft copolymerization under specific temperature and pressure, its water-soluble component combines the water-retaining and thickening properties of the etherified groups with the water-reducing properties of the polycarboxylate groups, thus solving the problem of poor compatibility between water-retaining and water-reducing agents. The introduction of the etherified anionic polymer helps improve the early adhesion and later bonding strength of wet mortar, significantly reducing the probability of plaster mortar "hollowing out."

[0003] Mortar modifiers are made from a mixture of various raw materials, including formaldehyde solution, acetone, sodium sulfite, etc. Formaldehyde solution is harmful, and industrial low-concentration formaldehyde waste liquid is generally difficult to treat, and improper treatment can cause environmental pollution. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment, which can realize the mixing of industrial low-concentration formaldehyde waste liquid with formaldehyde solution and its application in mortar modifier.

[0005] The present invention provides a low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment, comprising a mixing mechanism and two liquid storage mechanisms.

[0006] The mixing mechanism includes a mixing cylinder, a switching plate rotatably connected to the top of the mixing cylinder, and a partition plate installed inside the mixing cylinder at the lower end of the switching plate; the partition plate divides the mixing cylinder into two chambers; two liquid inlet pipes are provided at the upper end of the mixing cylinder; one liquid inlet pipe is connected to a liquid storage mechanism; and two liquid passage holes are provided on the switching plate.

[0007] When the liquid passage is connected to the liquid inlet pipe, the liquid in one liquid storage device flows into one cavity.

[0008] When the liquid passage is located above the partition plate, the liquid passage connects the two cavities.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: By mixing formaldehyde solution with formaldehyde waste liquid, the low-concentration formaldehyde waste liquid can be applied to the synchronous mortar modifier, which is not only conducive to the harmless and resource-based utilization of formaldehyde waste liquid, but also reduces the overall product cost and improves the product's competitiveness.

[0010] In this solution, when adding formaldehyde solution and formaldehyde waste liquid into the mixing cylinder, the partition plate divides the mixing cylinder into two non-communicating chambers to avoid backflow. At the same time, when the connecting pipe rotates, the partition plate can also stir the formaldehyde solution and formaldehyde waste liquid, accelerating the mixing process.

[0011] In this scheme, by controlling the rotation of the switching disk, the liquid passage can be connected to the liquid inlet pipe to allow liquid to enter the cavity, or it can move above the partition plate to connect the two cavities, thereby allowing the liquid to mix.

[0012] This design prevents outside air from entering the mixing drum during liquid mixing, effectively reducing formaldehyde volatilization.

[0013] This solution controls the rotation of the drive sleeve, enabling it to both rotate the partition plates until they overlap, dividing the mixing cylinder into two chambers, and to rotate the connecting pipe and the partition sleeve to mix the liquid.

[0014] This solution controls the rotation of the central shaft, causing it to drive two liquid storage tanks to work simultaneously, adding formaldehyde solution and formaldehyde waste liquid into the mixing cylinder at the same time.

[0015] In this design, the sealing cap serves both to seal the replenishment tube and to control the movement of the first or second tensioning wheel, allowing the central shaft to drive only one piston body, which facilitates the replenishment of liquid into the storage tank. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the production process of the mortar modifier of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the present invention;

[0018] Figure 3 is an exploded structural diagram of the present invention;

[0019] Figure 4 is an exploded structural diagram of the hybrid mechanism of the present invention.

[0020] Figure 5 is a schematic diagram of the structure of the mixing mechanism of the present invention in its initial state.

[0021] Figures 6 and 7 are schematic diagrams of the structure when the liquid passage hole and the liquid inlet pipe of the present invention are connected.

[0022] Figure 8 is a schematic diagram of the structure when the liquid passage of the present invention connects two cavities.

[0023] Figures 9 and 10 are schematic diagrams of the structure of the connecting pipe of the present invention when it rotates in the forward direction.

[0024] Figure 11 is an exploded structural diagram of the liquid storage mechanism and the regulating mechanism of the present invention.

[0025] Figure 12 is a schematic diagram of the adjustment mechanism of the present invention.

[0026] Figure 13 is a schematic diagram of the structure when the second tensioning pulley of the present invention is separated from the adjusting timing belt.

[0027] Explanation of the labels in the diagram:

[0028] 1. Base; 11. Mixing rack; 12. Liquid storage rack; 13. Positioning plate; A. Mixing mechanism; 21. Switching motor; 22. Mixing motor; 301. Solution chamber; 302. Waste liquid chamber; 31. Mixing cylinder; 311. Inlet pipe; 312. Outlet pipe; 313. Pawl; 32. Switching disc; 321. Liquid passage hole; 33. Sealing body; 34. Separator sleeve; 341. Separator plate; 342. Separator Column; 41. Connecting pipe; 411. Lower base plate; 412. Racket notch; 413. Connecting hole; 414. Sliding groove; 42. Balance spring; 43. Drive shaft; 431. Reset wedge; 4311. Reset wedge; 432. Synchronizing block; 433. Connecting thread; 44. Drive sleeve; B. Liquid storage mechanism; 501. Solution tank; 502. Waste liquid tank; 51. Liquid storage tank; 511. Liquid passage pipe; 512. Connecting frame; 513. Supplementary pipe; 514. Threaded sleeve; 52. Sealing cap; 53. Piston body; 531. Piston screw; 532. Drive wall; 54. Piston drive column; 541. Piston drive groove; C. Adjusting mechanism; 61. Connecting synchronous belt; 62. First tensioning pulley; 621. First gear; 63. First rack; 7. Central shaft; 71. Drive column; 72. Adjusting cone; 73. Feed motor; 81. Adjusting housing; 82. Adjusting synchronous belt; 83. Second tensioning pulley; 831. Second gear; 84. Second rack; 85. Adjusting screw; 86. Adjusting motor; 91. Second slider; 911. Second drive wall; 92. First slider; 921. First drive wall; 93. Second connecting plate; 931. Second insertion rod; 94. First connecting plate; 941. First insertion rod. Detailed Implementation

[0029] Specific Embodiment 1: Please refer to Figure 1-13 for a low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment, including a base 1, a mixing mechanism A installed on the base 1, and two liquid storage mechanisms B; one liquid storage mechanism B is used to store formaldehyde solution, and the other liquid storage mechanism B is used to store formaldehyde waste liquid. In this scheme, formaldehyde solution and formaldehyde waste liquid are collectively referred to as liquid. The mixing mechanism A is used to mix formaldehyde solution and formaldehyde waste liquid to obtain formaldehyde mixture.

[0030] The production equipment also includes a first stirring mechanism, a second stirring mechanism, a first adding mechanism, and a second adding mechanism; the first adding mechanism stores acetone and sodium sulfite; the second adding mechanism stores cellulose, water-retaining agent, air-entraining agent, sodium gluconate, and maltodextrin.

[0031] The formaldehyde mixture flowing out of mixing unit A is delivered to the first stirring unit. The first adding unit can add the corresponding weight of acetone and sodium sulfite to the first stirring unit according to the dosage ratio. Then the first stirring unit stirs the formaldehyde mixture, acetone and sodium sulfite to form a water-reducing agent.

[0032] Next, the first mixing mechanism delivers the mixed water-reducing agent to the second mixing mechanism, while the second adding mechanism adds the corresponding weights of cellulose, water-retaining agent, air-entraining agent, sodium gluconate, and maltodextrin to the second mixing mechanism according to the dosage ratio.

[0033] Next, the second mixing mechanism starts working to mix and stir the materials inside, ultimately forming a synchronous mortar modifier.

[0034] The mixing mechanism A includes a mixing cylinder 31, a switching disk 32 rotatably connected to the top of the mixing cylinder 31, and a partition plate 341 installed inside the mixing cylinder 31 at the lower end of the switching disk 32. The partition plate 341 divides the mixing cylinder 31 into two chambers: one chamber is a solution chamber 301, and the other chamber is a waste liquid chamber 302. The lower end of the switching disk 32 is sealed against the partition plate 341. A switching motor 21 is fixedly connected to the upper end of the mixing cylinder 31. The output shaft of the switching motor 21 is coaxially fixedly connected to the switching disk 32, thereby controlling the rotation of the switching disk 32. The axis of the mixing cylinder 31 is longitudinally arranged. A mixing frame 11 fixedly connected to the mixing cylinder 31 is fixedly connected to the upper end of the base 1.

[0035] The mixing cylinder 31 is provided with two liquid inlet pipes 311 at its upper end; one liquid inlet pipe 311 is connected to a liquid storage mechanism B; the switching disk 32 is provided with two liquid passage holes 321; the two liquid inlet pipes 311 are centrally symmetrically distributed, and the two liquid passage holes 321 are centrally symmetrically distributed.

[0036] When the liquid passage 321 is connected to the liquid inlet pipe 311, the liquid in one liquid storage device B flows into one cavity. At this time, the two cavities are not connected to each other. As a result, the formaldehyde solution only enters the solution cavity 301, and the formaldehyde waste liquid only enters the waste liquid cavity 302. They will not mix with each other, thus avoiding backflow. This would prevent the formaldehyde solution from flowing back into the liquid storage device B containing the formaldehyde waste liquid, or the formaldehyde waste liquid from flowing back into the liquid storage device B containing the formaldehyde solution, thereby affecting the subsequent mixing.

[0037] When the liquid passage hole 321 is located above the partition plate 341, the liquid passage hole 321 connects the two cavities, and the switching plate 32 seals each liquid inlet pipe 311. At this time, formaldehyde solution and formaldehyde waste liquid can enter the cavity on the other side through the liquid passage hole 321, and then the two liquids mix to form a formaldehyde mixture.

[0038] The mixing cylinder 31 is provided with two centrally symmetrically distributed liquid outlet pipes 312 at its upper end; when the liquid passage hole 321 is connected to the liquid outlet pipe 312, the liquid in the mixing cylinder 31 will be discharged through the liquid outlet pipe 312 and enter the first stirring mechanism.

[0039] Each cavity is sealed and slidably connected with a sealing body 33; a balance spring 42 is installed between each sealing body 33 and the mixing cylinder 31 to drive the sealing body 33 to abut against the switching disk 32, and all parameters of the two balance springs 42 are the same.

[0040] When there is no liquid in the cavity, the sealing body 33 is pressed against the lower end of the switching plate 32 under the action of the balance spring. At this time, there is no air (or very little air) in the cavity. Then, liquid is injected into the cavity through the liquid inlet pipe 311 and the liquid passage hole 321. The sealing body 33 will move downward away from the switching plate 32 under the action of the liquid. During this process, no outside air will enter the cavity, so the formaldehyde in the liquid will not evaporate, thus avoiding affecting the final concentration and avoiding the generation of irritating odors that could harm the operator.

[0041] The mixing cylinder 31 is coaxially rotatably connected to a connecting pipe 41; the outer wall of the connecting pipe 41 is provided with a plurality of longitudinally arranged partition sleeves 34; a partition plate 341 is provided on the outer wall of each partition sleeve 34; the inner wall of the partition sleeve 34 is sealed against the outer wall of the connecting pipe 41, and two adjacent partition sleeves 34 are sealed against each other; the partition plate 34 is arranged along the diameter direction of the connecting pipe 41, and both ends are sealed against the inner wall of the mixing cylinder 31.

[0042] The separator sleeve 34 is rotatably connected to the connecting pipe 41 in the circumferential direction. When the separator sleeve 34 rotates to the point where each separator plate 341 overlaps, each separator plate 341 divides the mixing cylinder 31 into two cavities. When the separator sleeve 34 rotates to the point where there is an angle between two adjacent separator plates 341, the space connecting the two cavities increases. At this time, the connecting pipe 41 drives each separator sleeve 34 to rotate synchronously, and the separator plates 341 stir the formaldehyde solution and formaldehyde waste liquid in the mixing cylinder 31, accelerating the mixing of the formaldehyde solution and formaldehyde waste liquid.

[0043] The sidewall of the connecting pipe 41 is provided with a plurality of sliding grooves 414 distributed circumferentially along the connecting pipe 41; for two adjacent partition sleeves 34, one partition sleeve 34 is fixedly connected to the connecting pipe 41, and the other partition sleeve 34 is slidably connected to the sliding groove 414 along the circumferential direction of the connecting pipe 41.

[0044] A drive shaft 43 is slidably connected axially inside the connecting pipe 41; the side wall of the drive shaft 43 is provided with a reset wedge 431 that drives each partition sleeve 34 to rotate until the partition plates 341 overlap.

[0045] The inner wall of the partition sleeve is provided with a partition post 342 extending to the inner side of the connecting pipe 41; a connecting hole 413 is provided between two adjacent sliding grooves 414; for two adjacent partition sleeves 34, the partition post 342 in one partition sleeve 34 is inserted and fixed with the connecting hole 413, and the partition post 342 in the other partition sleeve 34 is slidably inserted with the sliding groove 414.

[0046] The drive shaft 43 has a plurality of reset inclined blocks 431 on its side wall; one reset inclined block 431 corresponds to one sliding groove 414; the reset inclined block 431 has an inclined reset inclined surface 4311; the reset inclined surface 4311 can abut against the partition column 342 located in the sliding groove 414 and drive the partition column 342 to move, thereby driving the partition sleeve 34 to rotate relative to the connecting pipe 41.

[0047] A synchronization block 432 with a non-circular cross-section is provided on the lower part of the side wall of the drive shaft 43; the synchronization block 431 is slidably connected to the connecting pipe 41, so that the drive shaft 43 and the connecting pipe 41 move axially relative to each other and rotate synchronously in the circumferential direction.

[0048] When the drive shaft 43 moves downward, the reset inclined surface 4311 abuts against the partition column 342 and drives the partition sleeve 34 to rotate; when the drive shaft 43 moves to the lower limit position, the reset inclined surface 4311 drives the partition sleeve 34 to rotate until each partition plate 341 overlaps with each other.

[0049] When the drive shaft 43 moves upward to the limit position, the reset inclined surface 4311 separates from the partition column 342. At this time, the connecting pipe 41 rotates in the forward direction, and the liquid in the cavity exerts a thrust on the partition plate 341, thereby forcing the partition sleeve 34, which cooperates with the sliding groove 414, to rotate along the sliding groove 414, and thus the two adjacent partition plates 341 form an angle.

[0050] The lower end of the mixing cylinder 31 is rotatably connected to a drive sleeve 44; the drive sleeve 44 is coaxially threadedly connected to the drive shaft 43; a ratchet 313 is provided inside the mixing cylinder 31 to prevent the connecting pipe 41 from rotating in the opposite direction.

[0051] The lower part of the outer wall of the drive shaft 43 is provided with a connecting thread 433; the inner wall of the drive sleeve 44 is provided with a connecting internal thread that mates with the connecting thread 433.

[0052] The lower end of the outer wall of the connecting pipe 41 is provided with a lower base plate 411; the balance spring 42 is provided between the lower base plate 411 and the sealing body 33; the mixing cylinder 31 is provided with two pawls 313, which are centrally symmetrically distributed; the side wall of the lower base plate 414 is provided with a ratchet notch 412 that is unidirectionally connected to the pawls 313; there are two ratchet notches 412, which are centrally symmetrically distributed.

[0053] A hybrid motor 22 is fixedly connected to the base 1; the output shaft of the hybrid motor 22 is coaxially fixedly connected to the drive sleeve 44, thereby driving the drive sleeve 44 to rotate.

[0054] When the drive sleeve 44 rotates in the reverse direction, the drive sleeve 44 drives the drive shaft 43, the connecting pipe 41, and each partition sleeve 34 to rotate in the reverse direction synchronously until the pawl 313 engages with the ratchet notch 412, preventing the connecting pipe 41 from continuing to rotate in the reverse direction. At this point, the drive shaft 43 can no longer rotate in the reverse direction. Then, the drive sleeve 44 will rotate in the reverse direction relative to the drive shaft 43, causing the connecting thread 433 to move relative to the connecting internal thread. At this time, the drive sleeve 44 drives the drive shaft 43 to move downward, and each partition sleeve 34 gradually rotates until the partition plates 341 are facing each other.

[0055] When the drive sleeve 44 rotates in the forward direction, the connecting thread 433 engages with the connecting internal thread, causing the drive sleeve 44 to first drive the drive shaft 43 to move upward to its limit position (since only the drive shaft 43 is moved during this process, the resistance is small, and thus the drive shaft 43 moves upward preferentially). Then the drive sleeve 44 continues to rotate in the forward direction. At this time, the drive shaft 43 can no longer move upward. Therefore, the drive sleeve 44 will drive the drive shaft 43, the connecting pipe 41, each partition sleeve 34, and the sealing body 33 to move synchronously and continuously in the circumferential direction, mixing the formaldehyde solution and formaldehyde waste liquid.

[0056] The liquid storage mechanism B includes a liquid storage tank 51, a piston body 53 that is longitudinally sealed and slidably connected inside the liquid storage tank 51, and a piston drive column 54 that is coaxially rotatably connected below the liquid storage tank 51 to drive the piston body 53 to move longitudinally; a replenishment pipe 513 is provided at the center of the upper end of the liquid storage tank 51; a sealing cap 52 is detachably connected to the replenishment pipe 513.

[0057] The lower end of the liquid storage tank 51 is fixedly connected to a connecting frame 512; the piston drive column 54 is rotatably connected to the connecting frame 512; the lower end of the piston body 53 is coaxially provided with a piston screw 531 extending downward; the middle part of the connecting frame 512 is provided with a threaded sleeve 514 that is threadedly connected to the piston screw 531.

[0058] The piston screw 531 has longitudinally distributed drive walls 532 on its outer wall, which makes the cross-section of the piston screw 531 non-circular overall. The piston drive column 54 has a piston drive groove 541 that is inserted into the piston screw 531. The cross-section of the piston drive groove 541 is the same as the cross-section of the piston screw 531, which makes the piston drive column 54 and the piston screw 531 rotate synchronously in the circumference and slide relative to each other in the axial direction.

[0059] When the piston drive column 54 rotates, it drives the piston screw 531 to rotate synchronously, so that the piston screw 531 engages with the threaded sleeve 514, thereby causing the piston body 53 to move up and down.

[0060] The base 1 has a liquid storage rack 12 fixedly connected to the liquid storage tank 51 on both sides; one liquid storage tank 51 is a solution tank 501 that stores formaldehyde solution, and the other liquid storage tank 51 is a waste liquid tank 502 that stores formaldehyde waste liquid.

[0061] The upper end of the storage tank 51 is provided with a liquid passage pipe 511; the liquid passage pipe 511 at the upper end of the solution tank 501 is connected to the liquid inlet pipe 311 above the solution chamber 301; the liquid passage pipe 511 at the upper end of the waste liquid tank 501 is connected to the liquid inlet pipe 311 above the waste liquid chamber 301.

[0062] It also includes an adjustment mechanism C for adjusting the liquid output ratio of the two liquid storage mechanisms B; the adjustment mechanism C includes a central shaft 7, a connecting synchronous belt 61 connecting the central shaft 7 to a piston drive column 54, and an adjustment synchronous belt 82 connecting the central shaft 7 to another piston drive column 54.

[0063] The outer wall of the central shaft 7 is provided with a conical adjusting vertebra 72; the adjusting synchronous belt 82 cooperates with the adjusting vertebra 72.

[0064] The adjustment mechanism C also includes an adjustment housing 81 that drives the adjustment timing belt 82 to move axially along the central axis 7.

[0065] A positioning plate 13 is provided on the seat body 1; the central shaft 7 is rotatably connected to the positioning plate 13 and the shaft is arranged longitudinally; a drive column 71 is coaxially provided on the outer wall of the central shaft 7; one side of the connecting synchronous belt 61 is sleeved on the drive column 71.

[0066] The piston drive column 54 connected to the adjusting timing belt 82 is located below the waste liquid tank 501; the piston drive column 54 connected to the connecting timing belt 61 is located below the solution tank 501.

[0067] An adjusting screw 85, which is longitudinally arranged on the base 1 and threadedly connected to the adjusting housing 81, is rotatably connected to the base 1; an adjusting motor 86, which drives the adjusting screw 85 to rotate, is fixedly connected to the base 1.

[0068] The adjusting housing 81 is longitudinally slidably connected to one side of the positioning plate 13; the adjusting timing belt 82 is installed inside the adjusting housing 81 and moves up and down synchronously with the adjusting housing 81.

[0069] By controlling the up-and-down movement of the regulating housing 81, the regulating synchronous belt 82 moves axially on the outer wall of the regulating cone 72, thereby changing the transmission ratio between the central shaft 7 and the piston drive column 54 below the waste liquid tank 502. This allows the formaldehyde waste liquid of the corresponding proportion to be added into the mixing cylinder 31 when the central shaft 7 rotates and the solution tank 501 adds a specified volume of formaldehyde solution to the mixing cylinder 31, according to the required proportion.

[0070] The adjustment mechanism C also includes a first tensioning wheel 62 that abuts against the connecting timing belt 61; the upper end of the liquid storage tank 51, which cooperates with the adjustment timing belt 82, is slidably connected in the horizontal direction to a first slider 92 driven by the sealing cap 52; the first slider 92 is connected to the first tensioning wheel 62 in a transmission connection, thereby enabling the first tensioning wheel 62 to separate from the connecting timing belt 61.

[0071] The first slider 92 has an inclined first drive wall 921 on the side near the sealing cover 52; the lower end of the sealing cover 52 contacts the first drive wall 921 and forces the first slider 92 to move.

[0072] The first tensioning wheel 62 includes a first tensioning frame rotatably connected to the positioning plate 13, a first roller rotatably connected to the eccentric position of the first tensioning frame and abutting against the connecting timing belt 61, and a first torsion spring installed between the first tensioning frame and the positioning plate 13.

[0073] A first gear 621 is coaxially arranged on the first tensioning wheel 62; a first rack 63 that can mesh with the first gear 621 is slidably connected to the upper end of the positioning plate 13; the sliding direction of the first rack 63 is the same as that of the first slider 92; a first connecting plate 94 is fixedly connected to the first slider 92; a first insert rod 941 that is inserted into the first rack 63 is fixedly connected to the first connecting plate 94.

[0074] A first spring is installed between the first slider 92 and the liquid storage tank 51 to drive the first slider 92 to move in the direction of the replenishment tube 513.

[0075] The first slider 92 is installed on the waste liquid tank 502; when the sealing cover 52 is installed on the waste liquid tank 502, the sealing cover 52 abuts against the first drive wall 921, so that the first slider 92 is located at the extreme position far away from the replenishment pipe 513, at which time the first rack 63 does not contact the first gear 621.

[0076] When the sealing cap 52 is removed from the replenishment tube 513 on the waste liquid tank 502, the first slider 92 is located at the extreme position near the replenishment tube 513 under the action of the first spring. The first rack 63 moves synchronously and meshes with the first gear 621, so that the first gear 621 rotates until the first tension wheel 62 separates from the connecting timing belt 61. At this time, the connecting timing belt 61 is in a slack state, and the central shaft 7 cannot drive the piston drive column 54 to rotate through the connecting timing belt 61. At this time, the central shaft 7 rotates in the opposite direction. The central shaft 7 can only drive the piston drive column 54 below the waste liquid tank 502 to rotate by adjusting the timing belt 82, so that the piston body 53 in the waste liquid tank 502 moves downward, which makes it easier for the operator to add formaldehyde waste liquid into the waste liquid tank 502 through the replenishment tube 513.

[0077] The adjustment mechanism C also includes a second tensioning wheel 83 that abuts against the adjustment timing belt 82; the upper end of the liquid storage tank 51, which cooperates with the connecting timing belt 61, is slidably connected in the horizontal direction to a second slider 91 driven by the sealing cover 52; the second slider 91 is connected to the second tensioning wheel 83 in a transmission connection, so that the second slider 91 can separate the second tensioning wheel 83 from the adjustment timing belt 82.

[0078] The second slider 91 has an inclined second drive wall 911 on the side near the sealing cover 52; the lower end of the sealing cover 52 contacts the second drive wall 911 and forces the second slider 91 to move.

[0079] The second tensioning wheel 83 includes a second tensioning frame rotatably connected to the adjusting housing 81, a second roller rotatably connected to the eccentric position of the second tensioning frame and abutting against the adjusting timing belt 82, and a second torsion spring installed between the second tensioning frame and the adjusting housing 81.

[0080] When the adjusting housing 81 moves up and down, the second tensioning wheel 83 causes the adjusting timing belt 82 to deform, ensuring that the adjusting cone 72 and the piston drive column 54 are always connected in transmission.

[0081] A second gear 831 is coaxially mounted on the second tensioning wheel 83; a second rack 84 that can mesh with the second gear 831 is slidably connected to the adjusting housing 81; the second rack 84 slides in the same direction as the second slider 91; a second connecting plate 93 is fixedly connected to the second slider 91; a second insert rod 931 is provided on the second connecting plate 93 at a position opposite to the second rack 84; a second connecting hole is provided at the upper end of the second rack 84 for insertion into the second insert rod 931; the second insert rod 931 is slidably connected longitudinally in the second connecting hole, thereby the second slider 91 drives the second rack 84 to move horizontally synchronously and slide longitudinally relative to each other.

[0082] A second spring is installed between the second slider 91 and the liquid storage tank 51 to drive the second slider 91 to move towards the replenishment tube 513.

[0083] The second slider 91 is installed on the upper end of the solution tank 501. When the sealing cover 52 is installed on the upper end of the solution tank 501, the sealing cover 52 abuts against the second drive wall 911, so that the second slider 91 is located at the extreme position far away from the replenishment tube 513. At this time, the second rack 84 does not contact the second gear 831. At this time, the adjusting housing 81 moves up and down, and the second rack 84 will not hinder the rotation of the second tension wheel 83.

[0084] When the sealing cap 52 is removed from the replenishment tube 513 on the storage tank 501, the second slider 91 is located at the extreme position near the replenishment tube 513 under the action of the second spring. The second rack 84 moves synchronously and meshes with the second gear 831, so that the second gear 831 rotates until the second tension wheel 83 separates from the adjusting timing belt 82. At this time, the adjusting timing belt 82 is in a slack state, and the central shaft 7 cannot drive the piston drive column 54 to rotate through the adjusting timing belt 82. At this time, the central shaft 7 rotates in the opposite direction. The central shaft 7 can only drive the piston drive column 54 below the storage tank 501 to rotate through the connecting timing belt 61, so that the piston body 53 in the storage tank 501 moves downward, which makes it easier for the operator to add formaldehyde solution into the storage tank 501 through the replenishment tube 513.

[0085] In the initial state, the pawl 313 abuts against the ratchet notch 412, the drive shaft 43 is in the lower limit position, and the seal 33 abuts against the lower end of the switching disk 32.

[0086] During mixing, the position of the regulating housing 81 is first changed according to the ratio of formaldehyde solution and formaldehyde waste liquid. The regulating motor 86 drives the regulating screw 85 to rotate, and the regulating housing 81 drives the regulating synchronous belt 82 to move longitudinally, so that the position of the regulating synchronous belt 82 on the regulating cone 72 changes. At the same time, the second tensioning wheel 83, under the action of the second torsion spring, keeps the regulating synchronous belt 82 in contact with the regulating cone 72 and the piston drive column 54.

[0087] After the ratio adjustment is completed, the switching motor 21 drives the switching disk 32 to rotate, so that the liquid passage hole 321 is aligned with the liquid inlet pipe 311. Then, the feed motor 73 drives the central shaft 7 to rotate in the forward direction. The central shaft 7 drives the two piston drive columns 54 to rotate through the connection of the synchronous belt 61 and the adjustment of the synchronous belt 82. The piston drive columns 54 drive the piston body 53 to move upward, so that the formaldehyde solution in the solution tank 501 gradually enters the solution chamber 301 through the liquid inlet pipe 311, and forces the sealing body 33 in the solution chamber 301 to slide downward. At the same time, the formaldehyde waste liquid in the waste liquid tank 502 gradually enters the waste liquid chamber 302, and forces the sealing body 33 in the waste liquid chamber 302 to gradually move downward. Since the ratio of formaldehyde solution to formaldehyde waste liquid is not one to one, the heights of the two sealing bodies 33 are different.

[0088] After a certain period of time, the feed motor 73 stops working. At this time, the mixing cylinder 31 contains the required volume of formaldehyde solution and formaldehyde waste liquid. The switching motor 21 drives the switching disk 32 to rotate at a certain angle, so that the liquid passage hole 321 moves to directly above the partition plate 341. Since the parameters of the two balance springs 42 are the same, the lower sealing body 33 will move upward under the action of the balance spring 42. This sealing body 33 forces the liquid above to enter the other side cavity through the liquid passage hole 321. Finally, the two sealing bodies 33 move to the same plane. At this time, the deformation of the two balance springs 42 is equal, and a balanced state is achieved.

[0089] Next, the mixing motor 22 drives the drive sleeve 44 to rotate in the forward direction. The drive sleeve 44 first drives the drive shaft 43 to move upward to the limit position through the connecting thread 433. The reset wedge 431 separates from the partition column 342. Then, it drives the drive shaft 43, the connecting pipe 41, and each partition sleeve 34 to rotate synchronously in the circumferential direction. During this process, the liquid in the mixing cylinder 31 generates a thrust on the partition plate 341. The partition plate 341 is resisted and slides along the sliding groove 414. An angle is generated between two adjacent partition plates 341. Then, the drive sleeve 44 continues to drive the partition sleeve 34 to rotate. The partition plate 341 mixes the formaldehyde solution and the formaldehyde waste liquid.

[0090] After a certain period of time, the formaldehyde solution and formaldehyde waste liquid are mixed. The mixing motor 22 drives the drive sleeve 44 to rotate in the opposite direction, and the connecting pipe 41 rotates in the opposite direction until the pawl 313 and the ratchet notch 412 abut against each other. The connecting pipe 41 can no longer rotate, and then the drive sleeve 44 rotates to drive the drive shaft 43 to move downward. The reset wedge 431 abuts against the partition column 342. Finally, the drive shaft 43 moves to the lower limit position, and each partition plate 341 is facing each other.

[0091] Next, the switching motor 21 drives the switching disk 32 to rotate, so that the liquid passage 321 is connected to the liquid outlet pipe 312. The balance spring 42 drives the sealing body 33 to move upward. The mixed formaldehyde liquid will flow into the first stirring mechanism through the liquid outlet pipe 312. Finally, the sealing body 33 and the switching disk 32 abut against each other, returning to the initial state.

[0092] When the formaldehyde solution in solution tank 501 is too low, formaldehyde solution needs to be added to solution tank 501.

[0093] Remove the sealing cap 52 from the top of the solution tank 501. The second slider 91 moves toward the replenishment tube 513. The second slider 91 drives the second rack 84 to move synchronously, so that the second rack 84 meshes with the second gear 831 and drives the second gear 831 to rotate. Then the second tension wheel 83 rotates at a certain angle. Adjust the synchronous belt 82 to not drive the central shaft. At this time, the feed motor 73 drives the central shaft 7 to rotate in the opposite direction. The central shaft 7 drives the corresponding piston drive column 54 to rotate in the opposite direction through the synchronous belt 61. The piston body 53 in the solution tank 501 moves downward. At the same time, formaldehyde solution is added to the solution tank through the replenishment tube 513.

[0094] After a certain period of time, the feed motor 73 stops working, and the sealing cover 52 is reinstalled on the replenishing tube 513. The sealing cover 52 forces the second slider 91 to move away from the replenishing tube 513 through the second drive wall 911. The second rack 84 moves synchronously. Finally, the second rack 84 separates from the second gear 831. The second tension wheel 83 abuts against the adjusting timing belt 82 under the action of the second torsion spring. The adjusting timing belt 82 is once again connected to the adjusting cone 72 and the piston drive column 54.

[0095] When the formaldehyde waste liquid in waste liquid tank 502 is too low, formaldehyde waste liquid needs to be added to waste liquid tank 502.

[0096] Remove the sealing cap 52 at the top of the waste liquid tank 502. The first slider 92 drives the first rack 63 to move synchronously toward the replenishment tube 513. The first rack 63 drives the first gear 621 to rotate, causing the first tensioning wheel 62 to separate from the connecting synchronous belt 61, and then the connecting synchronous belt 61 to separate from the central shaft 7.

[0097] Next, the feed motor 73 drives the central shaft 7 to rotate in the opposite direction. By adjusting the synchronous belt 82, the piston drive column 54 is driven to rotate in the opposite direction. The piston body 53 in the waste liquid tank 502 moves downward, and at the same time, formaldehyde waste liquid is added to the waste liquid tank 502 through the replenishment pipe 513.

[0098] After a certain period of time, the feed motor 73 stops working, and the sealing cover 52 is reinstalled on the replenishing tube 513. The sealing cover 52 forces the first slider 92 and the first rack 63 to move away from the replenishing tube 513 through the first drive wall 921. Finally, the first rack 63 separates from the first gear 621, and the first tension wheel 62 abuts against the connecting synchronous belt 61 under the action of the first torsion spring. The connecting synchronous belt 61 is then connected to the drive column 71 and the piston drive column 54 again.

[0099] Then, the first mixing mechanism, the second mixing mechanism, the first adding mechanism, and the second adding mechanism work together to finally form the mortar modifier.

[0100] Using the aforementioned equipment, multiple formaldehyde mixtures with formaldehyde concentrations of 10%, 20%, 30%, and 40% were obtained. Then, different water-reducing agents were prepared according to the ratio of acetone:formaldehyde mixture:sodium sulfite = 1:0.975:1.17. The performance indicators of the water-reducing agents were compared with those of existing products. The specific small-scale test process is as follows:

[0101] ;

[0102] After the dripping is completed, continue to keep warm for 3 hours, take samples for testing, and the specific indicators are as follows: (using Southern 42.5 cement) admixture 1.8%.

[0103] .

[0104] The 10% formaldehyde waste liquid has similar production indicators to the existing products and meets the requirements of water-reducing agents.

[0105] .

[0106] After the dripping is completed, continue to keep warm for 3 hours, take samples for testing, and the specific indicators are as follows: (using Southern 42.5 cement) admixture 1.8%.

[0107] .

[0108] The 20% formaldehyde waste liquid has similar production indicators to the existing products and meets the requirements of water-reducing agents.

[0109] .

[0110] After the dripping is completed, continue to keep warm for 3 hours, take samples for testing, and the specific indicators are as follows: (using Southern 42.5 cement) admixture 1.8%.

[0111] .

[0112] The 30% formaldehyde waste liquid showed slight differences in various production indicators compared to the current product and the 10% and 20% waste liquids. The reflux time was prolonged during the pilot test, which may affect production. Therefore, a 40% ratio test was conducted to observe the effect.

[0113] .

[0114] After the dripping is completed, continue to keep warm for 3 hours, take samples for testing, and the specific indicators are as follows: (using Southern 42.5 cement) admixture 1.8%.

[0115] .

[0116] The 40% formaldehyde waste liquid showed slight differences in various production indicators compared to the existing products and the 10% and 20% waste liquids. During the small-scale test, the reflux time was prolonged and the reflux volume was increased, which had a significant impact on the test parameters.

[0117] Next, based on the requirements of synchronous mortar—good fluidity, water retention, and a certain consistency to meet the apparent density requirements—cellulose and air-entraining agent were selected for compounding. The mixture was prepared according to the ratio of water-reducing agent:cellulose:air-entraining agent:water = 500:0.2:6:493.8. The material ratio in the mortar was as follows: cement:fly ash:expansive agent:gypsum:sand:water:synchronous mortar modifier = 50:150:50:50:1350:235:15. The test data are as follows:

[0118] ;

[0119] Conclusion: The consistency is too low, the density is too high, and the water retention rate is too low. The requirements are not met.

[0120] The mortar was prepared according to the following ratio: water-reducing agent: cellulose: air-entraining agent: water-retaining agent: water = 550:0.2:8:5:436.8. The material proportions in the mortar were as follows: cement: fly ash: expanding agent: gypsum: sand: water: synchronous mortar modifier = 50:150:50:50:1350:235:15. The test data are as follows:

[0121] ;

[0122] Conclusion: The consistency is slightly low, the density is suitable, and the water retention rate is relatively low. It does not fully meet the requirements.

[0123] The mortar was prepared according to the following ratio: water-reducing agent: cellulose: air-entraining agent: water-retaining agent: K12: water = 600:0.25:10:6:0.2:383.55. The material proportions in the mortar were as follows: cement: fly ash: expanding agent: gypsum: sand: water: synchronous mortar modifier = 50:150:50:50:1350:235:15. The test data are as follows:

[0124] ;

[0125] Conclusion: The consistency, density, and water retention are all suitable. The requirements are met.

[0126] The mortar was prepared according to the following ratio: water-reducing agent: sodium gluconate: cellulose: air-entraining agent: water-retaining agent: K12: maltodextrin: water = 600:20:0.25:10:6:0.2:1.5:362.05. The mortar material ratio in the following proportions is: cement: fly ash: expanding agent: gypsum: sand: water: synchronous mortar modifier = 50:150:50:50:1350:235:15. The test data are as follows:

[0127] ;

[0128] Conclusion: The consistency, density, and water retention are all suitable, meeting the requirements. However, while increasing sodium gluconate and maltodextrin improved consistency and decreased density, it also reduced water retention. Compared to the previous result, the increased cost did not lead to improvements in all performance indicators.

Claims

1. A device for simultaneously producing mortar modifier from low-concentration formaldehyde waste liquid, characterized in that: The system includes a mixing mechanism (A) and two liquid storage mechanisms (B). The mixing mechanism (A) includes a mixing cylinder (31), a switching disk (32) rotatably connected to the top of the mixing cylinder (31), and a partition plate (341) installed inside the mixing cylinder (31) at the lower end of the switching disk (32). The partition plate (341) divides the mixing cylinder (31) into two chambers. Two inlet pipes (311) are provided at the upper end of the mixing cylinder (31). One inlet pipe (311) is connected to one liquid storage mechanism (B). Two liquid passage holes (321) are provided on the switching disk (32). When the liquid passage hole (321) is connected to the inlet pipe (311), the liquid in one liquid storage mechanism (B) flows into one chamber. When the liquid passage hole (321) is located above the partition plate (341), the liquid passage hole (321) connects the two chambers. The mixing cylinder (31) is connected to the two liquid storage mechanisms (B). A connecting pipe (41) is rotatably connected to the shaft; a plurality of longitudinally arranged partition sleeves (34) are provided on the outer wall of the connecting pipe (41); a partition plate (341) is provided on the outer wall of each partition sleeve (34); the partition sleeve (34) is rotatably connected to the connecting pipe (41) in the circumferential direction; a plurality of sliding grooves (414) distributed in the circumferential direction of the connecting pipe (41) are provided on the side wall of the connecting pipe (41) in the axial direction; for two adjacent partition sleeves (34), one partition sleeve (34) is fixedly connected to the connecting pipe (41), and the other partition sleeve (34) is slidably connected to the sliding groove (414) in the circumferential direction of the connecting pipe (41); a drive shaft (43) is slidably connected in the axial direction inside the connecting pipe (41); a reset wedge (431) is provided on the side wall of the drive shaft (43) to drive each partition sleeve (34) to rotate so that each partition plate (341) overlaps with each other.

2. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment according to claim 1, characterized in that: Each cavity is sealed and slidably connected with a sealing body (33); a balance spring (42) is installed between each sealing body (33) and the mixing cylinder (31) to drive the sealing body (33) to abut against the switching disk (32).

3. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment according to claim 1, characterized in that: The lower end of the mixing cylinder (31) is coaxially rotatably connected to a drive sleeve (44); the drive sleeve (44) is coaxially threadedly connected to the drive shaft (43); a ratchet (313) is provided inside the mixing cylinder (31) to prevent the connecting pipe (41) from rotating in the opposite direction.

4. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment according to claim 1, characterized in that: The liquid storage mechanism (B) includes a liquid storage tank (51), a piston body (53) that is longitudinally sealed and slidably connected inside the liquid storage tank (51), and a piston drive column (54) that is coaxially rotatably connected below the liquid storage tank (51) to drive the piston body (53) to move longitudinally; a replenishment tube (513) is provided at the center of the upper end of the liquid storage tank (51); a sealing cap (52) is detachably connected to the replenishment tube (513).

5. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment according to claim 4, characterized in that: It also includes an adjustment mechanism (C) for adjusting the liquid output ratio of the two liquid storage mechanisms (B); the adjustment mechanism (C) includes a central shaft (7), a connecting synchronous belt (61) connecting the central shaft (7) to a piston drive column (54), and an adjustment synchronous belt (82) connecting the central shaft (7) to another piston drive column (54); the outer wall of the central shaft (7) is provided with a conical adjustment cone (72); the adjustment synchronous belt (82) cooperates with the adjustment cone (72); the adjustment mechanism (C) also includes an adjustment housing (81) that drives the adjustment synchronous belt (82) to move axially along the central shaft (7).

6. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment according to claim 5, characterized in that: The adjustment mechanism (C) further includes a first tensioning pulley (62) that abuts against the connecting timing belt (61); the upper end of the liquid storage tank (51) that cooperates with the adjustment timing belt (82) is slidably connected in the horizontal direction to a first slider (92) driven by a sealing cap (52); the first slider (92) is connected to the first tensioning pulley (62) in a transmission connection, thereby enabling the first slider (92) to separate the first tensioning pulley (62) from the connecting timing belt (61).

7. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment according to claim 5, characterized in that: The adjustment mechanism (C) further includes a second tensioning pulley (83) that abuts against the adjustment timing belt (82); the upper end of the liquid storage tank (51) that cooperates with the connecting timing belt (61) is slidably connected in the horizontal direction to a second slider (91) driven by the sealing cap (52); the second slider (91) is connected to the second tensioning pulley (83) in a transmission connection, thereby enabling the second slider (91) to separate the second tensioning pulley (83) from the adjustment timing belt (82).

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