CN-117815737-B - Filtering device

CN117815737BCN 117815737 BCN117815737 BCN 117815737BCN-117815737-B

Abstract

The application relates to the technical field of water quality detection, in particular to a filtering device. The filtering device comprises a first connecting pipe, a filter, a suction device, a frame body, a rocker arm and a transmission unit, wherein a liquid outlet of the filter is communicated with the first connecting pipe, the suction device comprises a suction cylinder and a piston rod, the frame body comprises a fixing frame and a pushing plate, the fixing frame is connected with the suction cylinder, the pushing plate is slidably arranged on the fixing frame, the pushing plate is connected with a second end of the piston rod, the rocker arm comprises a screw rod and a force arm, the screw rod penetrates through the fixing frame and is in threaded connection with the fixing frame, the first end of the screw rod is rotatably connected with the pushing plate, the force arm is provided with the transmission unit, the transmission unit is connected with the second end of the screw rod, and the transmission unit is configured to control the screw rod to be separated from the force arm when the rotation torque of the force arm is larger than the preset torque. The transmission unit is used for controlling the maximum rotation torque applied by the force arm, so that the filtration phenomenon caused by overlarge filtration pressure is avoided, and the accuracy of the detection result is further ensured.

Inventors

WAN XINYU
CHEN YASONG
LIU MENGMENG
Lv Wanlin
JING FANGYUAN

Assignees

中国长江三峡集团有限公司

Dates

Publication Date: 20260505
Application Date: 20240204

Claims (10)

1. A filter device, comprising: A first connection pipe; The liquid outlet of the filter is communicated with the first connecting pipe; The suction device comprises a suction cylinder and a piston rod, the suction cylinder is communicated with the liquid inlet of the filter, and the first end of the piston rod stretches into the suction cylinder and is in sliding connection with the suction cylinder; The frame main body comprises a fixed frame and a pushing plate, the fixed frame is connected with the suction cylinder, the pushing plate is slidably arranged on the fixed frame, and the pushing plate is connected with the second end of the piston rod; The rocker arm comprises a screw rod and a force arm, wherein the screw rod penetrates through the fixing frame and is in threaded connection with the fixing frame, a first end of the screw rod is rotatably connected with the pushing plate, a transmission unit is arranged on the force arm and is connected with a second end of the screw rod, and the transmission unit is configured to control the screw rod to be separated from the force arm for transmission when the rotation torque of the force arm is larger than a preset torque.
2. The filter device of claim 1, wherein the transmission unit includes a torsion gear rotatably mounted on the arm of force and fixedly coupled to the second end of the screw, a torsion lock engaged with the torsion gear, an elastic member coupled between the torsion lock and an end of the transmission shaft, and a transmission shaft configured to compress the elastic member to set the preset torque.
3. The filtering device according to claim 2, wherein a threaded guide rail is arranged on the arm of force, and the transmission shaft is arranged in the threaded guide rail in a penetrating manner and is in threaded connection with the threaded guide rail.
4. A filter device according to claim 3, wherein the arm is provided with graduations at a location laterally of the threaded guide rail.
5. The filter device according to claim 1, wherein the filter comprises a filter housing, a first filter membrane, a second filter membrane and a support, wherein two ends of the filter housing are respectively communicated with the first connecting pipe and the suction device, the first filter membrane, the second filter membrane and the support are detachably mounted in the filter housing, the first filter membrane is positioned on one side of the support facing the suction device, the second filter membrane is positioned on one side of the support facing the first connecting pipe, and the pore size of the first filter membrane is larger than that of the second filter membrane.
6. The filtering device according to claim 1, wherein the fixing frame comprises a first supporting member, two guide rails and a second supporting member, the suction cylinder is connected with the first supporting member, two ends of the first supporting member are respectively connected with first ends of the two guide rails, two second ends of the two guide rails are respectively connected with two ends of the second supporting member, the screw rod penetrates through the second supporting member and is in threaded connection with the second supporting member, and two ends of the pushing plate are respectively connected with the two guide rails in a sliding manner.
7. The filter device of claim 6, wherein the frame body further comprises a support frame, the second support member being coupled to the support frame, the screw being disposed through the support frame.
8. The filter device of any of claims 1-7, wherein the rocker arm further comprises a handle, an end of the handle rotatably mounted to an end of the moment arm remote from the screw.
9. The filter device according to any one of claims 1 to 7, wherein a switching member is mounted on the first connection pipe, the switching member being configured to control a communication state of the first connection pipe.
10. The filter device according to any one of claims 1 to 7, wherein the number of the first connection pipe, the filter, and the suction device is plural, each of the filters corresponds to one of the first connection pipe and one of the suction device, and the plural suction devices are connected to the frame body, respectively.

Description

Filtering device Technical Field The application relates to the technical field of water quality detection, in particular to a filtering device. Background Water quality monitoring is an important component of environmental engineering. In the fields of water quality monitoring, environmental protection and the like, water quality monitoring of water areas such as oceans, rivers, lakes, reservoirs and the like has been used as an important point of environmental protection. In many cases, the water quality needs to be collected and stored and then returned to the laboratory for analysis. Samples of various water qualities, during the period from collection to analysis and measurement, can cause changes in certain physical parameters and chemical components of the samples due to changes in environmental conditions, which can place high demands on sample preservation and pretreatment. The existing sample preservation device can not meet the requirement of preserving water quality, and even if the sample is preserved and transported at low temperature, the microbial degradation still can cause the water quality index of the sample to change. At present, some water quality monitoring modes use a filtering device to separate soluble and insoluble substances (including microorganisms) in a sample, and the separated substances are respectively and correspondingly processed so as to conveniently detect the sample, so that more accurate data can be obtained. However, for high viscosity and high turbidity sewage (such as sewage of an activated sludge biochemical tank, hot hydrolysis digestive juice, etc.), solid-liquid separation is difficult, and too high filtering pressure may cause a filtration phenomenon, so that insoluble substances are scattered into the filtered liquid, and the detection result is disturbed. Disclosure of Invention Based on the above, the application provides a filtering device to solve the problems that in the related art, for high-viscosity and high-turbidity sewage, solid-liquid separation is difficult, and too high filtering pressure can cause a filtration phenomenon to interfere with a detection result. The present application provides a filtering device comprising: A first connection pipe; the liquid outlet of the filter is communicated with the first connecting pipe; The suction device comprises a suction cylinder and a piston rod, the suction cylinder is communicated with the liquid inlet of the filter, and the first end of the piston rod stretches into the suction cylinder and is in sliding connection with the suction cylinder; the frame main body comprises a fixed frame and a pushing plate, the fixed frame is connected with the suction cylinder, the pushing plate is slidably arranged on the fixed frame, and the pushing plate is connected with the second end of the piston rod; The rocker arm comprises a screw rod and a force arm, wherein the screw rod penetrates through the fixing frame and is in threaded connection with the fixing frame, the first end of the screw rod is rotatably connected with the pushing plate, a transmission unit is arranged on the force arm and is connected with the second end of the screw rod, and the transmission unit is configured to control the screw rod to be separated from the force arm for transmission when the rotation torque of the force arm is larger than the preset torque. In one possible implementation, the transmission unit includes a torsion gear rotatably mounted on the arm of force and fixedly connected with the second end of the screw, a torsion lock engaged with the torsion gear, an elastic member connected between the torsion lock and an end of the transmission shaft, and a transmission shaft configured to compress the elastic member to set a preset torque. In one possible implementation, the arm of force is provided with a threaded guide, and the drive shaft is threaded into and in threaded connection with the threaded guide. In one possible implementation, the arm is provided with graduations at positions laterally of the threaded guide rail. In one possible implementation manner, the filter comprises a filter shell, a first filter membrane, a second filter membrane and a support, wherein two ends of the filter shell are respectively communicated with the first connecting pipe and the suction device, the first filter membrane, the second filter membrane and the support are detachably arranged in the filter shell, the first filter membrane is positioned on one side of the support facing the suction device, the second filter membrane is positioned on one side of the support facing the first connecting pipe, and the pore size of the first filter membrane is larger than that of the second filter membrane. In one possible implementation manner, the fixing frame comprises a first supporting piece, two guide rails and a second supporting piece, the suction cylinder is connected with the first supporting piece, two ends of the first supporting piece