Circulating device for realizing high resistivity of working fluid

Abstract

The utility model belongs to the technical field of working fluid separation, and particularly relates to a circulating device for realizing high resistivity of working fluid, an input end of a circulating pump is communicated with the bottom of a working fluid box, an output end of the circulating pump is communicated with the working fluid box after being connected in series with a resistivity detection element, and the bottom of the working fluid box is further connected with a drain pipe. A drainage valve is arranged on the drainage pipe; the filtering tank comprises a tank body, an ion exchange resin filtering layer and a distributor, the ion exchange resin filtering layer and the distributor are arranged in the tank body, the ion exchange resin filtering layer is arranged in the middle of the tank body, the distributor is located on the upper side of the ion exchange resin filtering layer and communicated with the output end of the circulating pump, and the bottom of the tank body is communicated with the working solution box. According to the utility model, working liquid can be continuously provided in time during machining, and continuous and timely machining is ensured.

Description

Technical Field

[0001] The invention discloses a circulation device for realizing high resistivity of working fluid, belonging to the technical field of working fluid separation. Background Art

[0002] High-resistivity working fluid usually refers to ultrapure water. High-resistivity working fluid undergoes a series of physical, chemical and biotechnological treatment steps to remove suspended matter, dissolved matter, ions and other impurities in the working fluid, thereby reducing the conductivity of the working fluid and making the working fluid contain almost no impurities. Except for water molecules, there are almost no other atoms, bacteria, viruses, organic matter, etc.

[0003] High-resistivity working fluid is in great demand in high-precision and high-demand electronic manufacturing fields such as semiconductor manufacturing, chip processing, and panel display. It can effectively reduce the thermal impact and motor wear during processing. Its almost non-conductive property can protect processing equipment, workpieces, electrodes, etc. from damage. In the machining process, especially in EDM, high-resistivity working fluid is also needed for cooling.

[0004] The production method of high-resistivity working fluid is to filter water through ion exchange resin to produce high-resistivity working fluid. However, during the machining process, the working fluid needs to be frequently turned on and off. Since it takes a certain amount of time for the ion exchange resin to filter the water and produce high-resistivity working fluid, the working fluid cannot be discharged in time when machining is required, and even the working fluid cannot be continuously provided during continuous machining, affecting the machining efficiency. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a circulating device capable of continuously preparing a working fluid with a high resistivity, thereby being able to timely provide the working fluid to a machining machine tool and realizing a high resistivity working fluid.

[0006] The utility model solves the technical problem by adopting the following technical solution: a circulation device for realizing high resistivity of working fluid, comprising a working fluid tank, a circulation pump, a filter tank and a resistivity detection element, wherein the input end of the circulation pump is connected to the bottom of the working fluid tank, the output end of the circulation pump is connected in series with the resistivity detection element and then connected to the working fluid tank, the bottom of the working fluid tank is also connected to a drain pipe, and a drain valve is arranged on the drain pipe;

[0007] The filter tank includes a tank body and an ion exchange resin filter layer and a distributor arranged in the tank body. The ion exchange resin filter layer is arranged in the middle of the tank body, the distributor is located on the upper side of the ion exchange resin filter layer, the distributor is connected to the output end of the circulation pump, and the bottom of the tank body is connected to the working liquid tank.

[0008] Furthermore, the filter tank also includes a cushion layer, which is arranged in the tank body and fixedly connected to the tank body, and the ion exchange resin filter layer is located on the upper side of the cushion layer.

[0009] Furthermore, it also includes a water outlet three-way valve, a wastewater pipe and a backwash pipe. The input end of the water outlet three-way valve is connected to the output end of the circulation pump, and the two output ends of the water outlet three-way valve are simultaneously connected to the distributor and the backwash pipe of the filter tank. The output end of the backwash pipe is connected to the bottom of the tank body, and the wastewater pipe is connected to the inner cavity of the tank body on the upper side of the ion exchange resin filter layer. A wastewater valve is arranged on the wastewater pipe, and a return valve is arranged between the bottom of the tank body and the working liquid tank.

[0010] Furthermore, it also includes a water replenishment tank and a water inlet three-way valve. The input end of the circulation pump is connected to the output end of the water inlet three-way valve, and the two input ends of the water inlet three-way valve are respectively connected to the bottom of the working liquid tank and the bottom of the water replenishment tank.

[0011] Furthermore, a water level sensor is arranged in the working fluid tank.

[0012] Furthermore, it also includes a main body, a working fluid tank is arranged in the main body, and a filter tank is arranged on one side of the main body.

[0013] Furthermore, a mounting seat is provided on one side of the main body, and ear plates are provided on both sides of the filter tank, and the ear plates are detachably connected to the mounting seat.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The circulation pump of the utility model can extract water in the working fluid tank and make the water evenly distributed on the ion exchange resin filter layer through the distributor, and then flow back to the working fluid tank after being filtered by the ion exchange resin filter layer. After the resistivity of the working fluid reaches the specified requirement, the circulation pump stops working, so that the working fluid can be provided in time and continuously during machining, ensuring that the machining is carried out continuously and timely. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a pipeline connection diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of the main cross-sectional view of the filter tank.

[0019] In the figure: 1. main body; 2. water inlet pipe; 3. working fluid tank; 4. resistivity sensor; 5. circulation pump; 6. water outlet three-way valve; 7. water inlet three-way valve; 8. filter tank; 801. tank body; 802. water inlet; 803. distributor; 804. ion exchange resin filter layer; 805. cushion layer; 806. backwash port; 807. return water port; 808. waste water port; 9. return water pipe; 11. waste water pipe; 12. drain pipe; 13. water supply tank; 14. universal wheel; 15. return water valve; 16. drain valve; 17. waste water valve; 18. backwash pipe. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0021] Figure 1-Figure 3 It is the best embodiment of the utility model, and the following Figure 1-Figure 3 The utility model is further described.

[0022] See attached Figure 1-Figure 3 , a circulation device for achieving high resistivity of working fluid, comprising a working fluid tank 3, a circulation pump 5, a filter tank 8 and a resistivity detection element. The input end of the circulation pump 5 is communicated with the bottom of the working fluid tank 3, and the output end of the circulation pump 5 is connected in series with the resistivity detection element and then communicated with the working fluid tank 3. The bottom of the working fluid tank 3 is also connected with a drain pipe 12, and a drain valve 16 is provided on the drain pipe 12. The circulation pump 5 of the utility model can extract water in the working fluid tank 3, and make the water evenly distributed on the ion exchange resin filter layer 804 through the distributor 803, and then flow back to the working fluid tank 3 after being filtered by the ion exchange resin filter layer 804, and after the resistivity of the working fluid reaches the specified requirement, the circulation pump 5 stops working, so that the working fluid can be provided in a timely and continuous manner during machining, ensuring that the machining is carried out continuously and in a timely manner. In this embodiment, the resistivity detection element is a resistivity sensor 4.

[0023] The device also includes a main body 1, and a universal wheel 14 is provided at the lower end of the main body 1. A working fluid tank 3 is provided in the main body 1, and is used to store a certain amount of water, and after circulating filtration, a working fluid with a high resistivity that meets the requirements is formed, so that when machining is required, the working fluid can be provided in a timely and continuous manner to ensure the continuous and stable operation of machining. The circulation pump 5 and the filter tank 8 are both provided on the outside of the main body 1, and are both detachably connected to the main body 1. A liquid level sensor is provided in the working fluid tank 3, and there are two liquid level sensors spaced apart in the height direction, so as to detect the highest liquid level and the lowest liquid level in the working fluid tank 3.

[0024] A mounting seat is provided on one side of the main body 1, and ear plates are provided on both sides of the filter tank 8. The ear plates on both sides are detachably connected to the mounting seat by bolts, thereby facilitating the disassembly and assembly of the filter tank 8, so as to facilitate the cleaning of the filter tank 8 and the replacement of the ion exchange resin filter layer 804.

[0025] The filter tank 8 includes a tank body 801, a distributor 803, an ion exchange resin filter layer 804 and a cushion layer 805. The tank body 801 is vertically arranged, and the tank body 801 is spliced ​​by three sections, wherein the three sections of the cylinder are detachably connected by flanges. A water inlet 802 is arranged at the top of the tank body 801, and the water inlet 802 is connected to the distributor 803. A return water port 807 and a backwash port 806 are arranged at the bottom of the tank body 801, wherein the backwash port 806 is vertically arranged at the lower side of the tank body 801 to ensure that the backwash water can enter the tank body 801 smoothly and without resistance. The return water port 807 is arranged on one side of the backwash port 806. The ion exchange resin filter layer 804 and the cushion layer 805 are both arranged in the middle section of the tank body 801, wherein the cushion layer 805 is fixedly mounted on the inner wall of the tank body 801, and the ion exchange resin filter layer 804 is located on the upper side of the cushion layer 805. The cushion layer 805 can be a filter screen or a fine sand layer to achieve the placement of the ion exchange resin. A wastewater outlet 808 is arranged on the side of the tank body 801, and the wastewater outlet 808 is connected to the inner cavity of the tank body 801 above the ion exchange resin filter layer 804.

[0026] The circulation device for achieving high resistivity of the working fluid also includes a water replenishment tank 13 , a water inlet three-way valve 7 , a water outlet three-way valve 6 , and a recoil pipe 18 .

[0027] The input end of the circulation pump 5 is connected in series with the water inlet pipe 2 and then communicated with the water outlet end of the water inlet three-way valve 7. The two water inlet ends of the water inlet three-way valve 7 are respectively communicated with the bottom of the working liquid tank 3 and the water replenishment tank 13, and when one water inlet end of the water inlet three-way valve 7 is connected with the water outlet end, the other water inlet end of the water inlet three-way valve 7 is in a closed state.

[0028] The output end of the circulation pump 5 is connected in series with the resistivity sensor 4 and then connected to the water inlet end of the water outlet three-way valve 6. The two water outlet ends of the water outlet three-way valve 6 are simultaneously connected to the water inlet 802 of the filter tank 8 and the input end of the recoil pipe 18. The output end of the recoil pipe 18 is connected to the recoil port 806 of the filter tank 8. When the water inlet end of the water outlet three-way valve 6 is connected to one output end, the other water outlet end of the water outlet three-way valve 6 is in a closed state.

[0029] The water return port 807 of the filter tank 8 is connected to the working fluid tank 3 through the water return pipe 9, and a water return valve 15 is provided on the water return pipe 9. The waste water port 808 of the filter tank 8 is connected to the waste water pipe 11, and a waste water valve 17 is provided on the waste water pipe 11.

[0030] The bottom of the working fluid tank 3 is also connected to a drain pipe 12 , on which a drain valve 16 is provided. The drain pipe 12 is connected to a cooling pump of the machine tool.

[0031] The device also includes a PLC controller, which is connected to the circulation pump 5, the water inlet three-way valve 7, the water outlet three-way valve 6, the resistivity sensor 4, the return valve 15, the liquid level sensor, the drain valve 16 and the wastewater valve 17 at the same time.

[0032] The device has three working states, namely, filtering state, water replenishing state and backwashing state.

[0033] In the filtering state, the input end of the circulation pump 5 is connected to the working fluid tank 3 through the water inlet three-way valve 7, and the output end of the circulation pump 5 is connected in series with the resistivity sensor 4 and is connected to the water inlet 802 of the filter tank 8 through the water outlet three-way valve 6. The wastewater valve 17 and the drain valve 16 are in the closed state, and the return valve 15 is in the open state. The circulation pump 5 extracts water from the working fluid tank 3, and after being detected by the resistivity sensor 4, it enters the filter tank 8 for filtration. The filtered water enters the working fluid tank 3. When the resistivity of the water reaches the requirement, the circulation pump 5 stops working. At this time, when the machine tool needs to use the working fluid, the drain valve 16 is opened.

[0034] In the water replenishment state, the input end of the circulation pump 5 is connected to the water replenishment tank 13 through the water inlet three-way valve 7, and the opening and closing states of the other valves are the same as the filtering state. When the liquid level of the working fluid in the working fluid tank 3 reaches the specified liquid level, it is switched to the filtering state.

[0035] In the backwash state, the input end of the circulation pump 5 is connected to the working fluid tank 3 through the water inlet three-way valve 7, and the output end of the circulation pump 5 is connected in series with the resistivity sensor 4 and is connected to the backwash port 806 of the filter tank 8 through the water outlet three-way valve 6. The wastewater valve 17 is in an open state, the drain valve 16 is in a closed state, and the return valve 15 is in a closed state. The circulation pump 5 extracts water from the working fluid tank 3, and after being detected by the resistivity sensor 4, it enters the filter tank 8 from the bottom for filtration, and then backwashes the ion exchange resin filter layer 804 through soft water, and the backwashed wastewater is discharged through the wastewater pipe 11.

[0036] It should be noted that after working for a specified time and when the machine tool is not working, the recoil state is started. The recoil state is also controlled by time. After the recoil reaches the specified time, the recoil work stops.

[0037] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A circulation device for achieving high resistivity of working fluid, characterized in that: The invention comprises a working liquid tank (3), a circulation pump (5), a filter tank (8) and a resistivity detection element, wherein the input end of the circulation pump (5) is connected to the bottom of the working liquid tank (3), the output end of the circulation pump (5) is connected in series with the resistivity detection element and then connected to the working liquid tank (3), the bottom of the working liquid tank (3) is also connected to a drainage pipe (12), and a drainage valve (16) is provided on the drainage pipe (12); The filter tank (8) comprises a tank body (801), and an ion exchange resin filter layer (804) and a distributor (803) arranged in the tank body (801); the ion exchange resin filter layer (804) is arranged in the middle of the tank body (801); the distributor (803) is located on the upper side of the ion exchange resin filter layer (804); the distributor (803) is connected to the output end of the circulation pump (5); and the bottom of the tank body (801) is connected to the working liquid tank (3).

2. A circulation device for achieving high resistivity of working fluid according to claim 1, characterized in that: The filtering tank (8) further comprises a cushion layer (805), the cushion layer (805) being arranged inside the tank body (801), the cushion layer (805) being fixedly connected to the tank body (801), and the ion exchange resin filtering layer (804) being located on the upper side of the cushion layer (805).

3. A circulation device for achieving high resistivity of working fluid according to claim 1, characterized in that: The invention also comprises a water outlet three-way valve (6), a wastewater pipe (11) and a backwash pipe (18); the input end of the water outlet three-way valve (6) is connected to the output end of the circulation pump (5); the two output ends of the water outlet three-way valve (6) are simultaneously connected to the distributor (803) of the filter tank (8) and the backwash pipe (18); the output end of the backwash pipe (18) is connected to the bottom of the tank body (801); the wastewater pipe (11) is connected to the inner cavity of the tank body (801) on the upper side of the ion exchange resin filter layer (804); a wastewater valve (17) is arranged on the wastewater pipe (11); and a return valve (15) is arranged between the bottom of the tank body (801) and the working liquid tank (3).

4. A circulation device for achieving high resistivity of working fluid according to claim 1, characterized in that: It also includes a water replenishment tank (13) and a water inlet three-way valve (7), wherein the input end of the circulation pump (5) is connected to the output end of the water inlet three-way valve (7), and the two input ends of the water inlet three-way valve (7) are respectively connected to the bottom of the working liquid tank (3) and the bottom of the water replenishment tank (13).

5. A circulation device for achieving high resistivity of working fluid according to claim 4, characterized in that: A water level sensor is arranged in the working fluid tank (3).

6. A circulation device for achieving high resistivity of working fluid according to claim 1, characterized in that: It also includes a main body (1), a working fluid tank (3) arranged inside the main body (1), and a filter tank (8) arranged on one side of the main body (1).

7. A circulation device for achieving high resistivity of working fluid according to claim 6, characterized in that: A mounting seat is provided on one side of the main body (1), and ear plates are provided on both sides of the filter tank (8), wherein the ear plates are detachably connected to the mounting seat.

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