Sludge specific resistance measuring device

Abstract

The utility model provides a sludge specific resistance measuring device, and belongs to the technical field of sludge specific resistance measuring devices. The sludge specific resistance measuring device comprises a suction filtration cylinder and a Buchner funnel inserted into a pipe opening of the suction filtration cylinder, a sealing sleeve is arranged on the edge of the pipe opening of the suction filtration cylinder in a surrounding mode, a counterweight sleeve is arranged on a funnel neck of the Buchner funnel, a valve is arranged on a pipeline c, the sludge specific resistance measuring device further comprises a timer, and the timer is electrically connected with a vacuum pump and a normally-open electromagnetic valve. After the determination time is up, the vacuum pump and the normally-open electromagnetic valve can be automatically closed to release pressure in the buffer tank, so that the problem that the detection result is influenced as the suction time of the filtering device by the existing determination device exceeds the preset time is solved; the balance weight sleeve enables the Buchner funnel to be always in a fit state with the sealing sleeve, so that the sealing performance of the Buchner funnel and the suction filtration cylinder is enhanced, and the problem that the detection result is inaccurate due to air leakage caused by untight sealing in the use process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge specific resistance measuring devices, in particular to a sludge specific resistance measuring device. Background Art

[0002] During the measurement of sludge specific resistance in water plants, a measuring device is required for detection. The existing measuring device generally includes a filtering device consisting of a Büchner funnel and a suction filter cartridge. After the sewage is injected into the Büchner funnel, the filtering device needs to be sucked for a period of time by a negative pressure device and then the negative pressure device is closed to measure the mass of the filtrate and the dried sludge to calculate the relevant values. During the above operation, when the Büchner funnel is inserted into the suction filter cartridge, it is easy to have a poor seal and cause air leakage, which makes the test result inaccurate. At the same time, after the existing measuring device is completed, the pressure in the buffer tank cannot be released in time after the vacuum pump is turned off, and the suction time of the filtering device exceeds the preset time, which affects the test result. Utility Model Content

[0003] In order to make up for the above deficiencies, the utility model provides a sludge specific resistance measuring device for solving the above problems.

[0004] The utility model is achieved in this way:

[0005] A sludge specific resistance measuring device comprises a filtering device and a negative pressure device connected thereto, wherein the filtering device comprises a suction filter cartridge and a Buchner funnel plugged into the pipe mouth thereof, the negative pressure device comprises a buffer tank and a vacuum pump, the suction end of the vacuum pump is connected to one side of the buffer tank via a pipe b, the other end of the buffer tank is connected to the suction filter cartridge via a pipe c and the pipe a, a sealing sleeve is arranged around the edge of the pipe mouth of the suction filter cartridge, a weighted sleeve is arranged on the funnel neck of the Buchner funnel, the valve is arranged on the pipe c, the buffer tank is also provided with a vacuum gauge, a regulating valve and a normally open solenoid valve connected thereto, and also comprises a timer, the timer is electrically connected to the vacuum pump and the normally open solenoid valve respectively, and is used to cut off or close the power supply of the vacuum pump and the normally open solenoid valve.

[0006] In an embodiment of the utility model, a plurality of filtering devices are provided, each of the filtering devices is connected to the pipeline c through a pipeline a, and the valve is provided on the pipeline a.

[0007] In an embodiment of the utility model, the sealing sleeve is annular in shape, and an annular bayonet is provided at the bottom thereof, and the pipe mouth of the Büchner funnel is inserted into the interior of the annular bayonet.

[0008] In one embodiment of the utility model, the weight sleeve is threadedly connected to the funnel neck of the Buchner funnel.

[0009] In an embodiment of the present invention, the counterweight sleeve is made of metal.

[0010] The beneficial effects of the utility model are:

[0011] 1. The set timer can automatically close the vacuum pump and the normally open solenoid valve after the measurement time is up, and automatically open the normally open solenoid valve to release the pressure inside the buffer tank after the power is cut off. This solves the problem that after the measurement is completed, the pressure in the buffer tank cannot be released in time after the vacuum pump is turned off in the existing measurement device, and the suction time of the filter device exceeds the preset time, which affects the test results.

[0012] 2. A weighted sleeve is provided at the neck of the Büchner funnel and a sealing sleeve is provided at the mouth of the filter cartridge. Under the action of gravity, the weighted sleeve keeps the Büchner funnel always in close contact with the sealing sleeve, thereby enhancing the sealing between the Büchner funnel and the filter cartridge and avoiding the problem of air leakage caused by poor sealing during use, which results in inaccurate test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the structure of a sludge specific resistance measuring device provided in an embodiment of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0016] Figure 3 A schematic diagram of the electrical connection structure of a sludge specific resistance measuring device provided in an embodiment of the utility model.

[0017] In the figure: 1. filtration device; 11. Buchner funnel; 12. suction filter cartridge; 2. pipeline a; 3. negative pressure device; 31. buffer tank; 32. vacuum gauge; 33. regulating valve; 34. pipeline b; 35. vacuum pump; 4. valve; 5. normally open solenoid valve; 6. timer; 7. sealing sleeve; 8. counterweight sleeve; 9. pipeline c. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-3 As shown, the utility model provides a technical solution: a sludge specific resistance measuring device, comprising a filtering device 1 and a negative pressure device 3 connected thereto, the filtering device 1 comprising a suction filter cartridge 12 and a Buchner funnel 11 plugged at the pipe mouth thereof, the negative pressure device 3 comprising a buffer tank 31 and a vacuum pump 35, the suction end of the vacuum pump 35 is connected to one side of the buffer tank 31 through a pipe b34, the other end of the buffer tank 31 is connected to the suction filter cartridge 12 through a pipe c9 and a pipe a2, a sealing sleeve 7 is arranged around the edge of the pipe mouth of the suction filter cartridge 12, and the Buchner funnel 11 is inserted at the pipe mouth thereof. The funnel neck of the buffer tank 31 is provided with a weight sleeve 8, a valve 4 is provided on the pipeline c9, and a vacuum gauge 32, a regulating valve 33 and a normally open electromagnetic valve 5 connected with the interior of the buffer tank 31 are also provided on the buffer tank 31. The vacuum gauge 32 is used to detect the vacuum degree inside the buffer tank 31, and the regulating valve 33 is used to adjust the pressure inside the buffer tank 31. A valve is provided between the vacuum gauge 32 and the buffer tank 31, and a timer 6 is also included. The timer 6 is electrically connected to the vacuum pump 35 and the normally open electromagnetic valve 5 respectively, so as to cut off or close the power supply of the vacuum pump 35 and the normally open electromagnetic valve 5.

[0021] In one embodiment, the set timer 6 can automatically turn off the vacuum pump 35 and the normally open solenoid valve 5 after the measurement time is up, and automatically open the normally open solenoid valve 5 to release the pressure inside the buffer tank 31 after the power is cut off. This solves the problem that after the measurement is completed, the pressure in the buffer tank 31 cannot be released in time after the vacuum pump 35 is turned off in the existing measurement device, and the suction time of the filter device 1 exceeds the preset time, affecting the detection result.

[0022] In another embodiment, a weighted sleeve 8 is provided at the funnel neck of the Büchner funnel 11 and a sealing sleeve 7 is provided at the tube mouth of the filter cartridge 12. Under the action of gravity, the weighted sleeve 8 enables the Büchner funnel 11 to always remain in contact with the sealing sleeve 7, thereby enhancing the sealing between the Büchner funnel 11 and the filter cartridge 12 and avoiding the problem of air leakage caused by poor sealing during use, thereby preventing the detection result from being inaccurate.

[0023] like Figure 1-2 As shown, a plurality of filter devices 1 are provided, and each filter device 1 is connected to a pipeline c9 via a pipeline a2, and a valve 4 is provided on the pipeline a2.

[0024] Specifically, the sludge specific resistance measuring device can be provided with multiple groups of filtering devices 1, which can be configured according to actual needs.

[0025] like Figure 1-2 As shown, the sealing sleeve 7 is annular in shape, and an annular bayonet is provided at the bottom thereof, and the pipe opening of the Buchner funnel 11 is clamped into the interior of the annular bayonet.

[0026] In one embodiment, the sealing sleeve 7 is made of soft silicone or nitrile rubber.

[0027] like Figure 1-2 As shown, as a preferred embodiment, the weight sleeve 8 is threadedly connected to the funnel neck of the Buchner funnel 11.

[0028] It should be noted that threads of the same size and opposite directions are respectively provided on the Büchner funnel 11 and the counterweight sleeve 8 , and the counterweight sleeve 8 of different sizes can be replaced according to the specifications of the Büchner funnel 11 .

[0029] In one embodiment, the weight sleeve 8 is made of metal, such as a copper pipe or a lead pipe.

[0030] Specifically, the working principle of the sludge specific resistance measuring device is as follows: the set timer 6 can automatically close the vacuum pump 35 and the normally open solenoid valve 5 after the measuring time is up, and automatically open the normally open solenoid valve 5 to relieve the pressure inside the buffer tank 31 after the power is cut off, which solves the problem that after the existing measuring device completes the measurement, the pressure in the buffer tank 31 cannot be relieved in time after the vacuum pump 35 is turned off, and the suction time of the filter device 1 exceeds the preset time, which affects the test result. A weighted sleeve 8 is provided at the funnel neck of the Büchner funnel 11 and a sealing sleeve 7 is provided at the tube mouth of the suction filter cartridge 12. Under the action of gravity, the weighted sleeve 8 keeps the Büchner funnel 11 in a fit with the sealing sleeve 7 at all times, thereby enhancing the sealing between the Büchner funnel 11 and the suction filter cartridge 12 and avoiding the problem of air leakage caused by poor sealing during use, which results in inaccurate test results.

[0031] It should be noted that the specific models and specifications of the normally open solenoid valve 5, timer 6 and vacuum pump 35 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0032] The power supply and principle of the normally open electromagnetic valve 5, the timer 6 and the vacuum pump 35 are clear to those skilled in the art and will not be described in detail here.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sludge specific resistance measuring device, comprising a filtering device (1) and a negative pressure device (3) connected thereto, wherein the filtering device (1) comprises a suction filter cartridge (12) and a Büchner funnel (11) plugged into the orifice thereof, wherein the negative pressure device (3) comprises a buffer tank (31) and a vacuum pump (35), wherein the suction end of the vacuum pump (35) is connected to one side of the buffer tank (31) via a pipe b (34), and the other end of the buffer tank (31) is connected to the suction filter cartridge (12) via a pipe c (9) and a pipe a (2), wherein: A sealing sleeve (7) is arranged around the edge of the pipe opening of the suction filter cartridge (12); a weighted sleeve (8) is arranged on the funnel neck of the Büchner funnel (11); a valve (4) is arranged on the pipe c (9); the buffer tank (31) is also provided with a vacuum gauge (32), a regulating valve (33) and a normally open solenoid valve (5) which are connected to the interior thereof; and a timer (6) is also included. The timer (6) is electrically connected to the vacuum pump (35) and the normally open solenoid valve (5) respectively, so as to cut off or close the power supply of the vacuum pump (35) and the normally open solenoid valve (5).

2. A sludge specific resistance measuring device according to claim 1, characterized in that: A plurality of the filter devices (1) are provided, and each of the filter devices (1) is connected to the pipeline c (9) via the pipeline a (2), and the valve (4) is provided on the pipeline a (2).

3. A sludge specific resistance measuring device according to claim 1, characterized in that: The sealing sleeve (7) is annular in shape, and an annular bayonet is provided at the bottom thereof, and the pipe opening of the Buchner funnel (11) is inserted into the interior of the annular bayonet.

4. A sludge specific resistance measuring device according to claim 1, characterized in that: The weighted sleeve (8) is threadedly connected to the funnel neck of the Buchner funnel (11).

5. A sludge specific resistance measuring device according to claim 1, characterized in that: The counterweight sleeve (8) is made of metal.

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