Polyacrylamide mother liquor transferring device
By designing a slipperable push block in the polyacrylamide mother liquor pipetting device, the problem that existing devices are difficult to accurately control the amount of pipetting and the residual liquid in the inner wall is solved, and efficient and accurate mother liquor pipetting and utilization is achieved.
Patent Information
- Application Number
- CN202421424646.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing polyacrylamide mother liquor pipetting device is difficult to accurately control the amount of pipetting, and the residual liquid on the inner wall of the device cannot be taken out after removal, which affects the utilization efficiency.
A transfer device is designed including a hollow tank body and a push block that can slide in a vertical direction. The push block slides in the inner cavity of the tank and moves as the polyacrylamide mother liquor rises and falls, and can scrape off the mother liquor residue on the inner side wall of the tank and improve the removal efficiency.
Accurate transfer and efficient utilization of polyacrylamide mother liquor is achieved, reducing mother liquor residues on the inner side wall of the tank body and reducing waste.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of solution transfer, in particular to a polyacrylamide mother solution transfer device. Background Art
[0002] Polyacrylamide is a linear organic macromolecular polymer and also a macromolecular water treatment flocculant product. It can be used to absorb suspended particles in water. In the petroleum industry, polyacrylamide is often the main agent in gel-type water plugging and profile control agents. When using it, first prepare the polyacrylamide dry powder into a high-concentration polyacrylamide mother liquor (or simply mother liquor) in a larger beaker, and then add the polyacrylamide mother liquor to a smaller beaker, or dilute it with water. The removed polyacrylamide mother liquor or the diluted low-concentration polyacrylamide solution can be used for evaluation, so we need a polyacrylamide mother liquor transfer device.
[0003] It is difficult to accurately control the amount of polyacrylamide mother liquor to be pipetted with the pipetting device currently used. Due to the high concentration, high viscosity and strong integrity of the polyacrylamide mother liquor, the polyacrylamide mother liquor sometimes needs to be manually sheared, which is extremely inconvenient to use. During the pipetting process of the mother liquor, there will be a lot of residual liquid on the inner wall of the pipetting device, which cannot be removed and can only be cleaned after a series of mother liquor pipetting work is completed, resulting in low utilization efficiency of the polyacrylamide mother liquor pipetted by the pipetting device. Utility Model Content
[0004] The utility model aims at the problem that after the mother liquid is removed, there will be a lot of residual liquid on the inner wall of the transfer device, which cannot be removed, is inconvenient to use, and affects the utilization efficiency of the polyacrylamide mother liquid. A polyacrylamide mother liquid transfer device is provided, wherein a push block that slides with the liquid level of the polyacrylamide mother liquid is arranged in the inner cavity of the tank body, and the circumferential side surfaces of the push block are always kept in contact with the inner wall of the tank body, and when the tank body contains the mother liquid, the push block floats on the liquid level of the mother liquid and slides in the vertical direction as the liquid level of the mother liquid rises and falls. When the polyacrylamide mother liquid is removed from the transfer device, the push block slides downward as the liquid level of the mother liquid drops, and the polyacrylamide mother liquid attached to the inner wall of the tank body can be scraped off, and the polyacrylamide mother liquid can be easily transferred, and at the same time, the residual amount of mother liquid on the inner wall of the tank body can be reduced as much as possible, thereby reducing the waste of polyacrylamide mother liquid and improving the utilization efficiency of the polyacrylamide mother liquid transferred by the transfer device.
[0005] To solve the above problems, the technical solution of the utility model is as follows:
[0006] A polyacrylamide mother liquid transfer device comprises a hollow tank body with a liquid inlet pipe, a liquid outlet pipe and an air pressure pipe connected to the outside, and a push block slidably arranged in the inner cavity of the tank body, the inner cavity of the tank body has a margin space for the push block to slide freely in the vertical direction, the liquid inlet pipe is connected to the top of the inner wall of the tank body, the position where the air pressure pipe is connected to the tank body is higher than the position where the liquid outlet pipe is connected to the tank body, and the air pressure pipe is externally connected to a negative pressure device, and the portion of the liquid outlet pipe located outside the tank body is also provided with a flow regulating structure for regulating the flow of the liquid outlet pipe, The circumferential side surfaces of the push block are always in contact with the inner wall of the tank body to divide the inner cavity of the tank body into an upper cavity above the push block and a lower cavity below the push block. The push block is provided with a through hole that passes vertically for the polyacrylamide mother liquid to pass through. The through hole of the push block is located directly below the connection between the liquid inlet pipe and the tank body. When the liquid level of the polyacrylamide mother liquid contained in the tank body contacts the bottom surface of the push block, the push block floats on the liquid level of the polyacrylamide mother liquid and slides freely vertically as the liquid level of the polyacrylamide mother liquid rises and falls.
[0007] Preferably, a support structure is connected to the lower surface of the push block, and when the push block falls to the bottom of the tank body, the push block abuts against the bottom wall of the tank body through the support structure, and the connection position between the support structure and the push block avoids the through hole of the push block.
[0008] Preferably, the tank body comprises a tank body with an open side and a side panel for closing the open side of the tank body, the side panel is detachably connected to the tank body, and the panel surface of the side panel is in contact with the open side of the tank body.
[0009] Preferably, the open side of the tank body is also provided with a closed-loop groove surrounding the opening, and an annular sealing strip is embedded in the groove. When the surface of the side panel fits with the open side of the tank body, the sealing strip also fits tightly with the surface of the side panel.
[0010] Preferably, the tank body comprises an open tank with an open top and a tank cover covering the top of the open tank, the tank cover is detachably connected to the open tank, the liquid inlet pipe and the air pressure pipe are both connected to the tank cover of the tank body, and the liquid outlet pipe is connected to the tank bottom of the open tank.
[0011] Preferably, an annular sealing gasket adapted to the mouth of the open can is also provided on the inner side of the can cover. When the can cover is installed on the top of the open can, the mouth of the open can is pressed against the inner wall of the can cover through the sealing gasket.
[0012] Preferably, the area of the tank body cavity for the push block to slide and the cross section of the push block are both circular, and the liquid flowing into the tank body through the liquid inlet pipe drips along the axis of the cross section of the push block, or:
[0013] The inner cavity area of the tank body for the push block to slide and the cross section of the push block are not circular.
[0014] Preferably, a closed-loop soft plug is provided around the circumferential side of the push block, and the push block is fitted with the inner wall of the tank body through the soft plug.
[0015] Preferably, a base or legs are provided at the bottom end of the tank body.
[0016] Preferably, a handle is connected to the top of the tank body.
[0017] Beneficial technical effects of the technical solution of the utility model:
[0018] (i) The inner cavity of the hollow tank body is used to contain the mother liquid, and a push block that can slide in the vertical direction is arranged in the inner cavity. The outside of the tank body is also connected to a liquid inlet pipe, a liquid outlet pipe and an air pressure pipe. The liquid inlet pipe is connected to the top of the inner wall of the tank body. The air pressure pipe sucks the gas in the tank body with the help of an external negative pressure device, thereby creating a negative pressure environment in the inner cavity of the tank body, thereby pumping the mother liquid from the liquid inlet pipe into the inner cavity of the tank body. The push block is also provided with a through hole for the dripping mother liquid to pass through. After the polyacrylamide mother liquid is sucked into the inner cavity of the tank body, it gradually accumulates at the bottom of the tank body, and the push block floats on the polyacrylamide mother liquid. As the liquid level of the polyacrylamide mother liquid increases, it gradually slides upward until the liquid level of the polyacrylamide mother liquid is higher than the connection position between the liquid outlet pipe and the tank body.
[0019] After closing the negative pressure device, the polyacrylamide mother liquid in the tank body is controlled to gradually flow out of the liquid outlet pipe by adjusting the flow regulating structure of the liquid outlet pipe, and the amount of polyacrylamide mother liquid removed can be accurately controlled. When the polyacrylamide mother liquid flows out, the push block slides downward as the mother liquid level drops. During the sliding process, the push block can scrape off the mother liquid attached to the inner wall of the tank body, minimize the amount of mother liquid residue on the inner wall of the tank body, reduce the amount of polyacrylamide mother liquid waste, and improve the utilization efficiency of the polyacrylamide mother liquid removed by the removal device. After completing a series of mother liquid removal work, you only need to disassemble the tank body and the side plate to easily remove or clean the small amount of polyacrylamide mother liquid remaining at the bottom of the tank body, thereby improving the utilization rate of the polyacrylamide mother liquid.
[0020] (ii) If the push block falls to the bottom of the tank body and fits with the bottom surface of the inner wall of the tank body, the polyacrylamide mother liquid falling from the liquid inlet pipe may directly accumulate at the through hole of the push block, and it is difficult to penetrate into the gap between the push block and the bottom surface of the inner wall of the tank body. The subsequent dripping polyacrylamide mother liquid may gradually accumulate and overflow to the top surface of the push block, increasing the waste of polyacrylamide mother liquid. Therefore, the lower surface of the push block in this scheme is connected with a support structure. When the push block falls to the bottom of the tank body, the push block is against the bottom wall of the tank body through the support structure, so that the push block and the bottom wall of the tank body maintain a certain distance. When the polyacrylamide mother liquid is sucked, the polyacrylamide mother liquid can pass through the through hole of the push block and directly fall on the bottom wall of the tank body.
[0021] (iii) The area in the tank body cavity for the push block to slide and the cross section of the push block are both circular, and the liquid flowing into the tank body through the liquid inlet pipe drips along the axis of the cross section of the push block. Regardless of whether the push block is deflected in the tank body cavity, the liquid flowing into the tank body from the liquid inlet pipe can always smoothly pass through the through hole of the push block when dripping.
[0022] If the inner cavity area of the tank body for the push block to slide and the cross-section of the push block are not circular, the push block cannot deflect, and the through hole of the push block is always located directly below the connection between the liquid inlet pipe and the tank body, which can also ensure that when the liquid flowing into the tank body from the liquid inlet pipe drips, it can always pass smoothly through the through hole of the push block. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 The schematic diagram of the structure of the polyacrylamide mother liquid removal device in the first embodiment of the utility model is shown;
[0024] Figure 2 The schematic diagram of the structure of the polyacrylamide mother liquid transfer device in the second embodiment of the present utility model is shown.
[0025] Markings in the accompanying drawings:
[0026] 1-tank body; 11-tank body; 111-side plate; 112-sealing strip; 12-open tank; 121-tank cover; 122-sealing pad; 2-base; 21-leg; 3-handle; 31-anti-slip pattern; 4-air pressure pipe; 5-liquid inlet pipe; 6-liquid outlet pipe; 61-flow regulating structure; 7-push block; 71-through hole; 72-soft plug; 73-support structure. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the following is a further detailed description of a polyacrylamide mother liquor transfer device proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.
[0028] The following will be combined with the attached Figure 1 ,2 The technical solution of a polyacrylamide mother liquid transfer device of the utility model is described in detail with specific embodiments.
[0029] Embodiment 1
[0030] like Figure 1 As shown, a polyacrylamide mother liquid transfer device of this embodiment includes a tank body 1 with an inlet pipe 5, an outlet pipe 6 and an air pressure pipe 4 connected to the outside. The tank body 1 is hollow, and the inlet pipe 5, the outlet pipe 6 and the air pressure pipe 4 are all connected to the inner cavity of the tank body 1. Among them, one end of the inlet pipe 5 is connected to the top of the inner wall of the tank body 1, and the other end is connected to a container for providing the polyacrylamide mother liquid to be transferred; the position where the air pressure pipe 4 is connected to the tank body 1 is higher than the position where the outlet pipe 6 is connected to the tank body 1, the air pressure pipe 4 is externally connected to a negative pressure device, and the outlet pipe 6 is installed with a flow regulating structure 61 for regulating the flow of the outlet pipe 6. After the flow regulating structure 61 is adjusted to be completely closed, the negative pressure device is operated to generate negative pressure in the tank body 1, and the polyacrylamide mother liquid (hereinafter referred to as mother liquid) is extracted by the inlet pipe 5. The mother liquid drips into the inner cavity of the tank body 1 through the liquid inlet pipe 5. When the liquid level of the mother liquid in the inner cavity of the tank body 1 is higher than the connection position between the liquid outlet pipe 6 and the tank body 1, the flow regulating structure 61 is controlled to open, and the mother liquid can flow out from the liquid outlet pipe 6. The flow regulating structure 61 is adjusted to control the flow of the mother liquid in the liquid outlet pipe 6 so as to transfer a sufficient amount of mother liquid. The flow regulating structure 61 can use a valve to control the flow of the mother liquid flowing through the liquid outlet pipe 6 to complete the work of transferring the mother liquid.
[0031] Specifically, the tank body 1 in this embodiment includes a tank body 11 with an open side and a side plate 111 for closing the open side of the tank body 11. The side plate 111 is detachably connected to the tank body 1, and specifically can be connected by snap-fit connection or bolt connection. When the side plate 111 is connected to the tank body 1, the inner wall of the tank body 11 and the side plate 111 surround and form a closed chamber, that is, the inner cavity of the tank body 1.
[0032] In addition, a closed-loop groove surrounding the opening is provided on the open side of the tank body 11, and an annular sealing strip 112 is placed in the groove. When the plate surface of the side panel 111 is in contact with the open side of the tank body 11, the sealing strip 112 is also in close contact with the plate surface of the side panel 111 to ensure the good air tightness of the tank body 1 as a whole.
[0033] A push block 7 is slidably arranged in the inner cavity of the tank body 1, and the push block 7 is slidably matched with the tank body 1 in the vertical direction, and the inner cavity of the tank body 1 also has a margin space for the push block 7 to slide vertically. The push block 7 is in the shape of a horizontal plate, and the cross section of the inner cavity portion of the tank body 1 for the push block 7 to slide up and down is adapted to the cross section of the push block 7, and the circumferential side surfaces of the push block 7 are all kept in contact with the side walls of the inner cavity of the tank body 1, thereby dividing the inner cavity of the tank body 1 into an upper cavity located above the push block 7 and a lower cavity located below the push block 7. The push block 7 is also provided with a through hole 71 for the mother liquid to pass through. The through hole 71 vertically penetrates the push block 7, and the through hole 71 of the push block 7 is provided just below the connection between the liquid inlet pipe 5 and the tank body 1. When negative pressure is generated in the inner cavity of the tank body 1 to extract the mother liquid, the mother liquid entering the tank body 1 drips from the liquid inlet pipe 5, passes through the through hole 71 of the push block 7, and finally drips on the inner cavity bottom wall of the tank body 1. When the liquid level of the mother liquid accumulated at the bottom of the tank body 1 rises to contact the bottom surface of the push block 7, the push block 7 floats on the liquid level of the mother liquid and slides up and down with the rise and fall of the liquid level of the mother liquid.
[0034] Specifically, the part of the inner cavity of the tank body 1 for the push block 7 to slide and the cross-sectional shape of the push block 7 in this embodiment are both rectangular, and the circumferential side of the push block 7 is also provided with an annular soft plug 72. The soft plug 72 in this embodiment is a rectangular annular rubber sleeve, and the circumferential side of the push block 7 is bonded and fixed to the soft plug 72. After the push block 7 is installed in the inner cavity of the tank body 1, the soft plug 72 is deformed and keeps in contact with the inner side wall of the tank body 1, that is, the push block 7 keeps in contact with the side wall of the inner cavity of the tank body 1 through the annular soft plug 72. When the push block 7 slides in the vertical direction, the soft plug 72 can fully scrape off the mother liquid remaining on the side wall of the inner cavity of the tank body 1. The residual amount of mother liquid on the inner side wall of the tank body 1 is reduced as much as possible, the waste amount of polyacrylamide mother liquid is reduced, and the utilization efficiency of the polyacrylamide mother liquid removed by the removal device is improved.
[0035] It should be understood that the portion of the inner cavity of the tank body 1 for the push block 7 to slide and the cross-sectional shape of the push block 7 are both rectangular, so that after the push block 7 is installed in the tank body 1, it is not easy to shift or deflect in the horizontal direction, so that the through hole 71 of the push block 7 is always aligned with the connection position between the liquid inlet pipe 5 and the tank body 1. Therefore, it is only necessary that the portion of the inner cavity of the tank body 1 for the push block 7 to slide and the cross-sectional shape of the push block 7 are not circular. In another embodiment, the portion of the inner cavity of the tank body 1 for the push block 7 to slide and the cross-sectional shape of the push block 7 can also be set to be circular, but after the push block 7 is installed in the tank body 1, the position where the tank body 1 is connected to the liquid inlet pipe 5 and the position where the through hole 71 of the push block 7 is opened need to coincide with the axis of the push block 7. In this case, even if the push block 7 rotates in the inner cavity of the tank body 1, the mother liquid entering the tank body 1 from the liquid inlet pipe 5 can also accurately drip through the through hole 71 of the push block 7.
[0036] After the mother liquid level in the tank body 1 is higher than the connection point between the liquid outlet pipe 6 and the tank body 1, the negative pressure device is closed to restore the air pressure in the tank body 1 to normal, and then the flow regulating structure 61 on the liquid outlet pipe 6 is opened, and the mother liquid is gradually discharged from the liquid outlet pipe 6 by using the pressure of the push block 7 on the mother liquid and the fluidity of the mother liquid itself. At the same time, the push block 7 slides downward as the mother liquid level decreases, and the mother liquid attached to the inner wall of the tank body 1 is gradually scraped off, reducing the residual mother liquid in the tank body 1, reducing waste, and making full use of the mother liquid in the transfer device. If necessary, a pressurizing device can also be connected to the air pressure pipe 4, and the pressurizing device and the negative pressure device are connected to the air pressure pipe 4 in parallel. In the process of discharging the mother liquid, the pressurizing device is used to input air into the tank body 1, which can promote the outflow of the mother liquid in the tank body 1, and at the same time, it can also avoid the problem that the pressure in the tank body 1 is less than the external pressure and the mother liquid cannot flow out. Both the pressurizing device and the negative pressure device can use air pumps. The air pump of the negative pressure device is used to suck the air in the tank body 1; the air pump of the pressurizing device is used to pump air into the tank body 1.
[0037] In this embodiment, the connection position of the air pressure tube 4 and the tank body 1 is higher than the connection position of the liquid outlet pipe 6 and the tank body 1. This is because when the mother liquid is pumped, it is necessary to ensure that the liquid level of the mother liquid accumulated in the tank body 1 is higher than the connection position of the liquid outlet pipe 6 and the tank body 1, so that the mother liquid can be smoothly discharged from the liquid outlet pipe 6; at the same time, it is also necessary to ensure that the liquid level of the mother liquid accumulated in the tank body 1 is lower than the connection position of the air pressure tube 4 and the tank body 1, so as to prevent the mother liquid in the tank body 1 from being sucked into the air pressure tube 4. Therefore, it can be understood that in other embodiments, the air pressure tube 4 can be connected to the top of the tank body 1, which can prevent the mother liquid in the tank body 1 from entering the air pressure tube 4.
[0038] The liquid outlet pipe 6 in this embodiment is connected to one side of the tank body 1, and the liquid outlet pipe 6 includes a horizontal section and a vertical section that are integrally formed and connected. One end of the horizontal section is connected to the tank body 1, and the other end is connected to the vertical section. The vertical section extends downward away from one end of the horizontal section, and the flow regulating structure 61 is installed in the vertical section of the liquid outlet pipe 6. When the mother liquid flows out of the liquid outlet pipe 6, it first passes through the horizontal section, and then flows freely downward through the vertical section. The flow regulating structure 61 in this embodiment uses a valve, and the speed of the mother liquid flowing out of the liquid outlet pipe 6 is changed by adjusting the opening of the valve, so as to accurately control the amount of polyacrylamide mother liquid to be removed.
[0039] In addition, if the push block 7 falls on the bottom of the tank body 1 and fits with the bottom surface of the inner wall of the tank body 1, the polyacrylamide mother liquid falling from the liquid inlet pipe 5 may splash onto the push block 7, or accumulate at the position of the through hole 71 of the push block 7, and it is difficult to penetrate into the gap between the push block 7 and the bottom surface of the inner wall of the tank body 1. The subsequent dripping polyacrylamide mother liquid will gradually overflow to the top surface of the push block 7 and accumulate on the top surface of the push block 7, increasing the waste of mother liquid. In order to solve this problem, the lower surface of the push block 7 in this embodiment is also connected to a support structure 73. When the push block 7 falls to the bottom of the tank body 1, the push block 7 is abutted against the bottom wall of the inner cavity of the tank body 1 through the support structure 73, so that the push block 7 and the bottom wall of the tank body 1 maintain a certain distance. When the polyacrylamide mother liquid is sucked, the mother liquid dripping from the liquid inlet pipe 5 passes through the through hole 71 of the push block 7 and directly falls on the bottom wall of the tank body 1. The support structure 73 in this embodiment uses a vertical support spring, the top of which is connected to the push block 7 and avoids the through hole 71 of the push block 7, so as to prevent the mother liquid from adhering to the top of the support spring and blocking the through hole 71 when dripping. When the push block 7 drops to the bottom of the tank body 1 along with the liquid level of the mother liquid, the bottom end of the support spring abuts against the bottom wall inside the tank body 1, so that the push block 7 cannot directly fall to the bottom wall of the inner cavity of the tank body 1. It should be understood that the support structure 73 can also use other structures, as long as it can be supported between the push block 7 and the bottom wall of the inner cavity of the tank body 1, and the installation position of the support structure 73 is set away from the through hole 71.
[0040] In addition, a base 2 is installed under the tank body 1, so that the removal device can be stably placed on the operating table for easy use by staff.
[0041] A handle 3 is also installed on the top of the tank body 1. Both ends of the handle 3 are integrally formed with connecting sections extending downward, and are welded and fixed to the top of the tank body 1 through the connecting sections. The top surface of the handle 3 is also processed with anti-slip grooves 31, which can facilitate the staff to hold the tank body 1.
[0042] It should be understood that after a series of mother liquor transfer operations are performed using the transfer device and the evaluation of the low-concentration polyacrylamide solution is completed, there will still be polyacrylamide mother liquor that cannot be discharged remaining at the bottom of the tank body 1. At this time, the tank body 11 and the side plate 111 can be disassembled to conveniently clean up the remaining small amount of polyacrylamide mother liquor.
[0043] Embodiment 2
[0044] See also Figure 2The difference between this embodiment and the first embodiment is that the tank body 1 in this embodiment includes an open tank 12 with an open top and a tank cover 121 covering the top of the open tank 12. The tank cover 121 is sleeved on the top of the open tank 12 and is threadedly matched with the outer side of the open tank 12 to achieve a detachable connection. When the tank cover 121 is installed on the open tank 12, a closed space is formed between the tank cover 121 and the open tank 12, that is, the inner cavity of the tank body 1. It should be understood that the tank cover 121 can also be sleeved on the open tank 12 to achieve a detachable connection by means of a snap fit. The two parts of the snap are fixedly connected to the tank cover 121 and the open tank 12 respectively. The snap can be used to tightly connect the tank cover 121 to the open tank 12, and the tank cover 121 can also be easily removed.
[0045] Specifically, the liquid inlet pipe 5 and the air pressure pipe 4 in this embodiment are both connected to the tank cover 121 of the tank body 1, and the liquid outlet pipe 6 is connected to the tank bottom of the open tank 12, so that the mother liquid in the open tank 12 can be fully discharged; the push block 7 can also scrape off as much mother liquid as possible on the inner wall of the open tank 12 as the mother liquid level falls. After completing a series of mother liquid removal operations, the amount of residual mother liquid at the bottom of the inner wall and the inner wall of the open tank 12 is small, which can also improve the utilization rate of the polyacrylamide mother liquid. The bottom surface of the open tank 12 is fixedly connected with a support leg 21, and the open tank 12 is placed on the operating table through the support leg 21 to avoid squeezing the liquid outlet pipe 6.
[0046] In addition, the cross-section of the inner wall of the open tank 12 in this embodiment is a rounded rectangle, and the circumferential side of the push block 7 is also surrounded by a closed-loop soft plug 72 , and the push block 7 is kept in contact with the inner wall of the open tank 12 through the soft plug 72 .
[0047] The top opening of the open tank 12 is in the shape of a rectangular ring, and a ring-shaped sealing gasket 122 is embedded in the tank cover 121. The shape of the sealing gasket 122 is adapted to the shape of the tank mouth of the open tank 12. When the tank cover 121 is installed on the top of the open tank 12, the tank mouth of the open tank 12 is tightly fitted against the inner wall of the tank cover 121 through the sealing gasket 122. The sealing gasket 122 can be used to block the gap between the tank cover 121 and the open tank 12, so that the tank body 1 as a whole maintains good airtightness.
[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0049] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A polyacrylamide mother liquor removal device, characterized in that: The invention comprises a hollow tank body with a liquid inlet pipe, a liquid outlet pipe and an air pressure pipe connected to the outside, and a push block slidably arranged in the inner cavity of the tank body, the inner cavity of the tank body has a residual space for the push block to slide freely in the vertical direction, the liquid inlet pipe is connected with the top of the inner wall of the tank body, the position where the air pressure pipe is connected with the tank body is higher than the position where the liquid outlet pipe is connected with the tank body, and the air pressure pipe is externally connected with a negative pressure device, and the part of the liquid outlet pipe located outside the tank body is also provided with a flow regulating structure for regulating the flow of the liquid outlet pipe, the circumferential side surfaces of the push block are always kept in contact with the inner wall of the tank body to divide the inner cavity of the tank body into an upper cavity above the push block and a lower cavity below the push block, the push block is provided with a through hole that penetrates vertically for the polyacrylamide mother liquid to pass through, the through hole of the push block is located directly below the connection point between the liquid inlet pipe and the tank body, when the liquid level of the polyacrylamide mother liquid contained in the tank body contacts the bottom surface of the push block, the push block floats on the liquid level of the polyacrylamide mother liquid, and slides freely vertically with the rise and fall of the liquid level of the polyacrylamide mother liquid.
2. A polyacrylamide mother solution removal device as claimed in claim 1, characterized in that: The lower surface of the push block is connected with a support structure. When the push block falls to the bottom of the tank body, the push block abuts against the bottom wall of the tank body through the support structure, and the connection position between the support structure and the push block avoids the through hole of the push block.
3. A polyacrylamide mother solution removal device as claimed in claim 1, characterized in that: The tank body comprises a tank body with an open side and a side plate for closing the open side of the tank body. The side plate is detachably connected to the tank body, and the plate surface of the side plate is in contact with the open side of the tank body.
4. A polyacrylamide mother solution removal device as claimed in claim 3, characterized in that: The open side of the tank body is also provided with a closed-loop groove surrounding the open opening, and an annular sealing strip is embedded in the groove. When the plate surface of the side plate fits with the open side of the tank body, the sealing strip also fits tightly with the plate surface of the side plate.
5. The polyacrylamide mother solution removal device according to claim 1, characterized in that: The tank body comprises an open tank with an open top and a tank cover covering the top of the open tank, the tank cover is detachably connected to the open tank, the liquid inlet pipe and the air pressure pipe are both connected to the tank cover of the tank body, and the liquid outlet pipe is connected to the tank bottom of the open tank.
6. A polyacrylamide mother solution removal device as claimed in claim 5, characterized in that: An annular sealing gasket adapted to the can mouth of the open can is also provided on the inner side of the can cover. When the can cover is installed on the top of the open can, the can mouth of the open can is pressed tightly against the inner wall of the can cover through the sealing gasket.
7. The polyacrylamide mother solution removal device according to claim 1, characterized in that: The area of the tank body cavity for the push block to slide and the cross section of the push block are both circular, and the liquid flowing into the tank body through the liquid inlet pipe drips along the axis of the cross section of the push block, or: The inner cavity area of the tank body for the push block to slide and the cross section of the push block are not circular.
8. The polyacrylamide mother solution removal device according to claim 1, characterized in that: A closed-loop soft plug is arranged around the circumferential side of the push block, and the push block is fitted with the inner wall of the tank body through the soft plug.
9. The polyacrylamide mother solution removal device according to claim 1, characterized in that: The bottom end of the tank body is provided with a base or supporting legs.
10. The polyacrylamide mother solution removal device according to claim 1, characterized in that: The top end of the tank body is connected with a handle.