Safe chemical feeding device

Abstract

The utility model discloses a safe chemical feeding device which comprises a feeding cavity, a feeding shell is installed on one side of the bottom of the feeding cavity in a penetrating mode, a stirring blade is installed in the feeding shell in a rotating mode, and a filter screen is arranged on one side of the stirring blade. A backwashing liquid outlet is formed in the position, located on one side of the stirring blades, of the bottom of the feeding shell, the bottom of the feeding cavity communicates with a feeding pipe, and an associated opening and closing state switching mechanism is arranged between the backwashing liquid outlet and the feeding pipe. Chemical liquid medicine is sucked into the feeding cavity from the feeding port through the piston assembly, and the stirring blades are driven to rotate under the driving of fluid, so that premixing is completed, impurity particles are removed through the filter screen, and the reaction proceeding quality of the chemical liquid medicine is guaranteed; by switching the opening and closing states of the backwashing liquid outlet and the feeding pipe, the piston is utilized to pressurize the cleaning liquid, and the inner wall of the feeding shell, the filter screen and the stirring blades are subjected to backwashing without disassembly, so that the cross contamination of chemical liquid medicine in the repeated use process of the feeding device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical processing, in particular to a chemical safety feeding device. Background Art

[0002] In the production process of chemicals, the feeding of liquid chemical raw materials is prone to volatilization or leakage. In the process of feeding multiple chemicals, due to harsh conditions, in order to ensure the normal progress of the reaction, it is necessary to feed at the same time, and the feeding time and feeding amount need to be accurately controlled;

[0003] Existing feeding devices often have long pipelines, especially when multiple materials are fed at the same time, there is a lack of stirring process, which leads to uneven feeding. At the same time, it is inconvenient to clean the internal pipelines and stirrers, which easily leads to the generation of impurities. For this reason, we provide a safe feeding device for chemicals. Utility Model Content

[0004] The utility model aims to provide a safe feeding device for chemicals.

[0005] The technical problems solved by the utility model are:

[0006] (1) How to achieve premixing and accurate dosing of multiple chemical solutions while feeding;

[0007] (2) How to backwash the feeding device to avoid subsequent repeated contamination problems;

[0008] The utility model can be implemented by the following technical scheme: a safe feeding device for chemicals, comprising a feeding cavity and a piston assembly which is sealed and slidably arranged in the inner cavity, a feeding shell is installed through one side of the bottom of the feeding cavity, a stirring blade is rotatably installed in the feeding shell, a filter is arranged on one side of the stirring blade, and a plurality of feeding ports with one-way valves are arranged on the side of the feeding shell away from the feeding cavity;

[0009] A backwash outlet is arranged at the bottom of the feed shell on one side of the stirring blade, a feed pipe is connected to the bottom of the feed cavity, and an associated opening and closing state switching mechanism is arranged between the backwash outlet and the feed pipe.

[0010] A further technical improvement of the utility model is that the piston assembly includes a piston cavity arranged on the top of the feeding cavity, the piston cavity and the feeding cavity are fixed by a sealing fastener, the sealing fastener is fixedly installed at the opening of the feeding cavity by a countersunk bolt, the piston cavity is sleeved on the sealing fastener and positioned by the top thereof, an outer cover is installed on the outside of the piston cavity, and the piston cavity is fixed by the outer cover.

[0011] A further technical improvement of the utility model is that sealing rings are arranged between the sealing fastener and the feeding cavity, and between the sealing fastener and the piston cavity for sealing.

[0012] A further technical improvement of the utility model is that a transparent scale plate is arranged on one side of the cavity wall of the feeding cavity for displaying the liquid level.

[0013] A further technical improvement of the utility model is that the opening and closing state switching mechanism includes a blocking structure that is adjustable in height and arranged in the feeding pipe and an adjusting shaft that rotates to control the blocking structure. The adjusting shaft passes through the feeding pipe and one side outer wall of the feeding cavity and rotates in a sealed manner with the two. The other end of the adjusting shaft controls the opening and closing state of the backwash liquid outlet.

[0014] A further technical improvement of the utility model is that the opening and closing states of the backwash liquid outlet and the feeding pipe are opposite.

[0015] A further technical improvement of the utility model is that a convergence port is provided in the feeding pipe, and a blocking structure is installed below the convergence port. The blocking structure includes a lifting block which slides up and down, a plug is fixed at the top center position of the lifting block, a fixed seat is vertically installed at the bottom of the lifting block, a circular hole is opened on the side of the fixed seat near the bottom position, an eccentric wheel is fixed on the outer periphery of the adjusting shaft located in the circular hole, and the adjusting shaft and the circular hole are coaxially arranged, and the eccentric wheel is slidably connected to the top of the circular hole.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The chemical liquid is sucked into the feeding chamber from the feed port through the piston assembly. The fluid drives the stirring blade to rotate, thereby completing the pre-mixing and removing the impurity particles through the filter screen to ensure the quality of the chemical liquid reaction. The transparent scale plate on the feeding chamber ensures the accuracy of the amount of chemical liquid added.

[0018] 2. By switching the opening and closing states of the backwash outlet and the feeding pipe, the cleaning liquid is pressurized by the piston to reversely flush the inner wall of the feed shell, the filter screen and the stirring blades, and discharged from the backwash outlet. It is convenient and quick, and does not require disassembly, avoiding cross contamination of chemical liquids during repeated use of the feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a cross-sectional schematic diagram of the overall internal structure of the utility model;

[0021] Figure 2 For this utility model Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 For this utility model Figure 1 A partial enlarged view of point B in the middle;

[0023] Figure 4 It is a side view schematic diagram of the connection structure between the fixing seat and the adjusting shaft of the utility model;

[0024] Figure 5 It is a schematic diagram of the internal structure of the feed shell of the utility model.

[0025] In the figure: 1. feeding chamber; 2. piston chamber; 3. outer cover; 4. piston; 5. transparent scale plate; 6. sealing fastener; 7. sealing ring; 8. feeding pipe; 9. lifting block; 10. plug; 11. fixing seat; 12. adjusting shaft; 13. adjusting knob; 14. feeding shell; 15. fixing ring; 16. stirring blade; 17. filter screen; 18. backwash outlet. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] See also Figure 1-5 As shown, a chemical safety feeding device comprises a feeding chamber 1, a piston chamber 2 is arranged on the top of the feeding chamber 1, and the piston chamber 2 and the feeding chamber 1 are fixed and sealed by a sealing fastener 6, wherein the sealing fastener 6 is fixedly installed at the opening of the feeding chamber 1 by a countersunk bolt, and the top of the sealing fastener 6 is arranged as a sealing positioning surface, the piston chamber 2 is sleeved in the sealing fastener 6 and is positioned in the vertical direction by contacting the sealing positioning surface with the step surface, an outer cover 3 is installed on the outer side of the piston chamber 2, and the piston chamber 2 is fixed by the outer cover 3, and the outer cover 3 is fixedly connected to the feeding chamber 1; moreover, a sealing ring 7 is arranged between the sealing fastener 6 and the feeding chamber 1, and between the sealing fastener 6 and the piston chamber 2 for sealing; the existence of the outer cover 3 further improves the sealing and independence;

[0028] A transparent scale plate 5 is provided on one side of the cavity wall of the feeding cavity 1 for displaying the liquid level or volume capacity inside the feeding cavity 1. A piston 4 is provided in a sealing and sliding manner in the inner cavity of the feeding cavity 1. The piston rod on the top of the piston 4 extends into the piston cavity 2 and slides in a sealing manner therewith. The bottom of the feeding cavity 1 is provided as a V-shaped inclined bottom surface, and a feeding pipe 8 is vertically penetrated and fixed on the inclined bottom surface.

[0029] A constriction port is provided in the feeding pipe 8, and a lifting block 9 is installed below the constriction port so as to slide up and down. A plug 10 is fixed at the top center of the lifting block 9. A plurality of leakage holes are evenly provided on the circumference of the lifting block 9 near the outside. A fixing seat 11 is vertically installed at the bottom of the lifting block 9. A circular hole is provided on the side of the fixing seat 11 near the bottom. An adjusting shaft 12 is coaxially provided in the circular hole. An eccentric wheel is fixed on the outer circumference of the adjusting shaft 12 located in the circular hole, and the eccentric wheel is slidably connected to the top of the circular hole.

[0030] The adjusting shaft 12 penetrates the feeding pipe 8 and the outer wall of one side of the feeding chamber 1, and the adjusting shaft 12 and the feeding pipe 8 and the feeding chamber 1 are all sealed and rotated. A feeding shell 14 is installed at the bottom side wall of the feeding chamber 1. The feeding shell 14 is connected to the inner cavity of the feeding chamber 1. A fixing ring 15 is coaxially fixed to the inner wall of the feeding shell 14. A stirring blade 16 is coaxially installed in the fixing ring 15. A filter screen 17 is installed on one side of the stirring blade 16. The filter screen 17 is connected to the inner side of the feeding shell 14. The wall is fixedly connected, one end of the feed shell 14 away from the feeding chamber 1 is connected to a plurality of feed ports, the feed port is provided with a one-way valve that only allows feeding but not discharging, a backwash outlet 18 is provided at the bottom of the feed shell 14 and on the left side of the stirring blade 16, the end of the adjusting shaft 12 away from the feeding pipe 8 is connected to a channel opening and closing valve for controlling the backwash outlet 18, and the opening and closing state of the valve of the backwash outlet 18 is opposite to the opening and closing state of the feeding pipe 8, and an adjusting knob 13 is coaxially fixed to the outer periphery of the adjusting shaft 12.

[0031] When feeding, the utility model starts the piston 4 to move upward, thereby forming a negative pressure in the feeding chamber 1, and one or more chemical liquids are sucked into the inner cavity of the feeding shell 14 through multiple feeding ports on one side of the feeding shell 14, and then the stirring blade 16 is impacted to rotate and disturb the chemical liquid to increase its uniformity, and the insoluble impurity particles are filtered out through the filter screen 17 before entering the feeding chamber 1; the piston 4 is driven to move downward, and since the backwash outlet 18 is in a closed state at this time and the feeding port is a one-way valve, during the downward movement of the piston 4, the chemical liquid enters the designated container from the feeding pipe 8, and the transparent scale plate 5 arranged on the side wall of the feeding chamber 1 can accurately read the volume of the chemical liquid;

[0032] When the device needs to be cleaned after the feeding is completed, first inject the cleaning liquid into the feeding chamber 1 according to the above steps, then turn the adjusting knob 13 to switch the opening and closing states of the backwash outlet 18 and the feeding pipe 8. At this time, the piston 4 is driven downward, and the cleaning liquid inside the feeding chamber 1 enters the backwash filter 17 and the stirring blade 16 in the feeding shell 14, forming a convection disturbance, and then cleaning the inner wall of the feeding shell 14, and discharged from the backwash outlet 18 under the action of water pressure, completing the entire cleaning process.

[0033] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A chemical safety feeding device, characterized in that: The invention comprises a feeding cavity (1) and a piston assembly which is sealed and slidably arranged in the inner cavity thereof, wherein a feeding shell (14) is installed through one side of the bottom of the feeding cavity (1), a stirring blade (16) is rotatably installed in the feeding shell (14), a filter screen (17) is arranged on one side of the stirring blade (16), and a plurality of feeding ports equipped with one-way valves are arranged on the side of the feeding shell (14) away from the feeding cavity (1); A backwash liquid outlet (18) is provided at the bottom of the feed shell (14) on one side of the stirring blade (16); a feed pipe (8) is connected to the bottom of the feed chamber (1); and an associated opening and closing state switching mechanism is provided between the backwash liquid outlet (18) and the feed pipe (8).

2. A chemical safety feeding device according to claim 1, characterized in that: The piston assembly comprises a piston chamber (2) arranged on the top of a feeding chamber (1); the piston chamber (2) and the feeding chamber (1) are fixed via a sealing fastener (6); the sealing fastener (6) is fixedly installed at the opening of the feeding chamber (1) via a countersunk bolt; the piston chamber (2) is sleeved on the sealing fastener (6) and positioned via the top thereof; an outer cover (3) is installed on the outer side of the piston chamber (2), and the outer cover (3) is used to fix the piston chamber (2).

3. A chemical safety feeding device according to claim 2, characterized in that: Sealing rings (7) are provided between the sealing fastener (6) and the feeding cavity (1), and between the sealing fastener (6) and the piston cavity (2) for sealing.

4. A chemical safety feeding device according to claim 1, characterized in that: A transparent scale plate (5) is provided on one side of the cavity wall of the feeding cavity (1) for displaying the liquid level.

5. A chemical safety feeding device according to claim 1, characterized in that: The opening and closing state switching mechanism comprises a blocking structure that is adjustable in height and arranged in the feeding pipe (8) and an adjusting shaft (12) that rotates to control the blocking structure. The adjusting shaft (12) penetrates the feeding pipe (8) and the outer wall of one side of the feeding chamber (1) and rotates in a sealed manner with both. The other end of the adjusting shaft (12) controls the opening and closing state of the backwash liquid outlet (18).

6. A chemical safety feeding device according to claim 1, characterized in that: The backwash liquid outlet (18) and the feeding pipe (8) have opposite opening and closing states.

7. A chemical safety feeding device according to claim 5, characterized in that: The feeding pipe (8) is provided with a convergence port, and a blocking structure is installed below the convergence port. The blocking structure includes a lifting block (9) that slides up and down, a plug (10) is fixed at the top center position of the lifting block (9), a fixing seat (11) is vertically installed at the bottom of the lifting block (9), a circular hole is opened on the side of the fixing seat (11) near the bottom position, an eccentric wheel is fixed on the outer periphery of the adjusting shaft (12) located in the circular hole, and the adjusting shaft (12) is coaxially arranged with the circular hole, and the eccentric wheel is slidably connected to the top of the circular hole.

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