Double-channel filtering device

Abstract

The utility model discloses a double-channel filtering device. The device comprises a double-channel filter, a differential pressure detection assembly, an electromagnetic valve and a pneumatic tilt cylinder, the filter comprises a first filter cartridge, a valve body and a second filter cartridge which are connected in sequence; the valve body is of a hollow structure and is provided with an inlet and an outlet. The two ends of a first filtering channel of the first filtering cylinder and the two ends of a second filtering channel of the second filtering cylinder communicate with the inlet and the outlet correspondingly. A valve rod connected with a connecting rod of the pneumatic tilt cylinder is arranged in the valve body, and the lower end of the valve rod comprises a first valve ball provided with a first communication channel and a second valve ball provided with a second communication channel. The differential pressure detection assembly can obtain the pressure difference between inlet fluid and outlet fluid and send a first control signal when the pressure difference is larger than a preset pressure difference threshold value, all air inlets of the pneumatic tilt cylinder are correspondingly connected with an air outlet of the electromagnetic valve, and the electromagnetic valve can change the air inlet position of the pneumatic tilt cylinder based on the control signal so that a connecting rod of the pneumatic tilt cylinder can rotate. And the valve rod is driven to rotate to realize switching of the filtering channels. And automatic switching of the filtering channels can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter equipment technical field, especially in kind of double -channel filter device. BACKGROUND

[0002] The robot welding equipment (automatic welding torch, glue spreading machine etc.) in the welding workshop of the existing automobile factory needs the cooling water and compressed air satisfying the use demand in the working process. But in the cooling water pipeline arrangement and the delivery pipeline, the impurity accumulation exists inevitably, and the pipeline corrosion can also cause the impurity accumulation after the system has run, the impurity is delivered through the pipeline, can cause the blockage in the user end, leads to the small flow of cooling water, and further causes the production line to break down and alarm stop, therefore, the double -channel filter is generally arranged in the delivery pipeline to filter the impurity in the cooling water delivery process in the prior art, and the filter blockage condition is judged manually in the prior art, and after one filter channel of the filter is blocked, the filter channel is switched through the manual valve rod driving mode, and the filter core of the blocked filter channel can be replaced and cleaned, but the filter blockage can be missed through the manual filter blockage judgment, which affects the production. In the actual application production, even if there is a way of cleaning the filter core of the filter regularly, but in the complex water pipeline network, the filter blockage and the small pipeline flow capacity can occur at any time, that is, the risk of production line breakdown and alarm stop exists all the time, therefore, it is very necessary to provide a double -channel filter device capable of automatically switching the filter channel. SUMMARY

[0003] In view of the above problems, the utility model is provided to provide a double -channel filter device which overcomes the above problems or at least partially solves the above problems.

[0004] The utility model discloses a double -channel filter device, including: double -channel filter, differential pressure detection component, solenoid valve, pneumatic swing cylinder;

[0005] The double -channel filter includes the first filter cylinder, the valve body and the second filter cylinder that are sequentially connected, the valve body is hollow structure, and the inlet and the outlet are arranged, and the both ends of the first filter channel of the first filter cylinder are communicated with the inlet and the outlet respectively, and the both ends of the second filter channel of the second filter cylinder are communicated with the inlet and the outlet respectively;

[0006] The valve rod is arranged in the valve body, the upper end of the valve rod is connected with the connecting rod of the pneumatic swing cylinder, and the first valve ball and the second valve ball are arranged on the lower end, a first communication channel is arranged on the first valve ball, and a second communication channel is arranged on the second valve ball;

[0007] The differential pressure detection component is arranged on the double-channel filter to obtain a pressure difference between inlet fluid and outlet fluid of the filter, and send a first control signal when the pressure difference is greater than a preset pressure difference threshold;

[0008] The gas inlet of the gas swing cylinder is connected with the gas outlet of the electromagnetic valve, and the electromagnetic valve is used to change the gas outlet thereof based on the first control signal, so as to change the gas inlet position of the gas swing cylinder and make the connecting rod of the gas swing cylinder rotate;

[0009] The rotation of the connecting rod drives the valve rod to rotate, so that the valve rod has a first position and a second position;

[0010] When the valve rod is in the first position, the first communication channel is in communication with the inlet and the inlet of the first filter channel, and the second communication channel is in communication with the outlet and the outlet of the first filter channel;

[0011] When the valve rod is in the second position, the first communication channel is in communication with the inlet and the inlet of the second filter channel, and the second communication channel is in communication with the outlet and the outlet of the second filter channel.

[0012] In one embodiment, the differential pressure detection component is a differential pressure sensor;

[0013] The differential pressure sensor is in communication with the inlet and the outlet to detect the pressure difference between the inlet fluid and the outlet fluid, and send a first control signal when the pressure difference is greater than a preset pressure difference threshold.

[0014] In an optional embodiment, the filter device provided by the embodiment of the utility model further includes a first safety alarm;

[0015] The first safety alarm is arranged on the double-channel filter and is electrically connected with the differential pressure sensor;

[0016] Correspondingly, the differential pressure sensor also sends a second control signal when the pressure difference is greater than a preset pressure difference threshold; and the first safety alarm is used to receive the second control signal and give a pre-warning based on the second control signal.

[0017] In an optional embodiment, the differential pressure detection component includes a first pressure sensor, a second pressure sensor and a second safety alarm;

[0018] The first pressure sensor is used to detect the inlet fluid pressure, and the second pressure sensor is used to detect the outlet fluid pressure;

[0019] The second safety alarm is electrically connected with the first pressure sensor and the second pressure sensor to receive the inlet fluid pressure and the outlet fluid pressure, obtain a pressure difference between the inlet fluid pressure and the outlet fluid pressure, and send a first control signal and give a safety warning when the pressure difference is greater than a preset difference threshold.

[0020] In an optional embodiment, the first inlet of the pneumatic swing cylinder and the first outlet of the electromagnetic valve are communicated through a connecting pipeline, and the second inlet of the pneumatic swing cylinder and the second outlet of the electromagnetic valve are communicated through a connecting pipeline.

[0021] In an optional embodiment, the filter device further comprises a conversion module, and the electromagnetic valve and the pneumatic swing cylinder are connected to different side walls of the conversion module.

[0022] The conversion module is provided with a third inlet, a fourth inlet, a third outlet and a fourth outlet, and the third inlet is communicated with the third outlet, and the fourth inlet is communicated with the fourth outlet.

[0023] The third inlet is in position correspondence and communication with the first outlet of the electromagnetic valve, the fourth inlet is in position correspondence and communication with the second outlet of the electromagnetic valve, the third outlet is in position correspondence and communication with the first inlet of the pneumatic swing cylinder, and the fourth outlet is in position correspondence and communication with the second inlet of the pneumatic swing cylinder.

[0024] In an optional embodiment, the first valve ball is provided with a first blind hole and a second blind hole in communication with each other, and the center lines of the first blind hole and the second blind hole are perpendicular to each other and in communication with each other to form a first communication channel.

[0025] The second valve ball is provided with a third blind hole and a fourth blind hole in communication with each other, and the center lines of the third blind hole and the fourth blind hole are perpendicular to each other and in communication with each other to form a second communication channel.

[0026] In an optional embodiment, a receiving support is arranged between the pneumatic swing cylinder and the upper end of the valve body, and the lower end of the pneumatic swing cylinder and the upper end of the valve body are connected to the receiving support through bolts.

[0027] The connecting rod and the valve rod are connected through a sleeve.

[0028] In an optional embodiment, the inlet and outlet positions of the first filter channel are provided with first valve seats for cooperating with the first valve ball.

[0029] The inlet and outlet positions of the second filter channel are provided with second valve seats for cooperating with the second valve ball.

[0030] The upper end of the valve rod is provided with an upper end cover, the lower end of the upper end cover abuts against the upper end of the valve body in the installed state, and a sealing element is arranged between the valve rod and the valve body.

[0031] In an optional embodiment, the filter device further comprises a handle.

[0032] One end of the handle is connected to the valve rod, so that the rotation of the valve rod is driven by rotating the handle.

[0033] The beneficial effects of the above technical solutions provided by the embodiments of the present application at least include:

[0034] The double-channel filter device provided by the embodiments of the present application is provided with a double-channel filter, a differential pressure detection assembly, an electromagnetic valve and a pneumatic swing cylinder; the differential pressure detection assembly is used to obtain the pressure difference between the inlet fluid and the outlet fluid of the filter, and in the case that the pressure difference is greater than a preset pressure difference threshold value, it represents that a blockage occurs in the filter channel; at this time, the differential pressure detection assembly sends a first control signal to the electromagnetic valve, the electromagnetic valve can change the gas outlet according to the first control signal, and then change the air inlet of the pneumatic swing cylinder, so that the stress direction of the connecting rod changes, the connecting rod rotates, and the rotation of the connecting rod drives the first valve ball and the second valve ball of the valve rod to rotate together and change the filter channel of the filter, that is, the automatic change of the filter channel is realized in the case that the filter channel of the filter is blocked, which can save labor cost and improve production efficiency. The first valve ball and the second valve ball move together, which can simultaneously close and open the inlet and outlet of the filter channel, realize the synchronous conversion, and improve the control efficiency of the channel conversion of the double-channel filter.

[0035] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned from practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0036] The technical solutions of the present application will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and serve to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0038] Figure 1 It is an explosion schematic view of the double-channel filter device in the embodiments of the present application.

[0039] Figure 2 It is a three-dimensional structure schematic view of the double-channel filtering device in the embodiment of the utility model;

[0040] Figure 3 It is another reverse three-dimensional structure schematic view of the double-channel filtering device in the embodiment of the utility model;

[0041] Figure 4 It is a fluid flow direction schematic view under the working state of the first filtering channel in the embodiment of the utility model;

[0042] Figure 5 It is a fluid flow direction schematic view under the working state of the second filtering channel in the embodiment of the utility model;

[0043] Figure 6 It is a partial structure schematic view of the patch valve in the embodiment of the utility model;

[0044] Figure 7 It is a structure schematic view of the conversion module in the embodiment of the utility model;

[0045] Figure 8 It is a structure schematic view of the pneumatic swing cylinder in the embodiment of the utility model.

[0046] Mark explanation:

[0047] 1, valve body; 2, first filter cylinder; 3, second filter cylinder; 4, front end cover; 5, electromagnetic valve; 6, conversion module; 7, pneumatic swing cylinder; 8, differential pressure detection assembly; 9, bearing support; 10, sleeve; 11, handle; 12, valve rod; 13, upper end cover; 14, first valve seat; 15, first valve ball; 16, linkage rod; 17, second valve ball; 18, second valve seat;

[0048] 101, inlet; 102, outlet; 201, first filtering channel; 301, second filtering channel; 51, first gas outlet; 52, second gas outlet; 53, first mounting hole; 54, electromagnetic valve gas inlet; 55, exhaust port; 61, third gas inlet; 62, fourth gas inlet; 63, third gas outlet; 64, fourth gas outlet; 65, second mounting hole; 71, first gas inlet; 72, second gas inlet; 73, connecting rod; 801, first pressure sensor; 802, second pressure sensor; 803, second safety alarm; 121, sealing element; 151, first communication channel; 152, first blind hole, 153, second blind hole; 171, second communication channel; 172, third blind hole; 173, fourth blind hole. Specific implementation

[0049] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure can be variously implemented and should not be limited by the embodiments set forth herein. Rather, the embodiments are provided to enable those skilled in the art to more thoroughly understand and convey the full scope of the present disclosure.

[0050] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In order to solve the problem that the existing double-channel filtering device cannot realize automatic switching of the filtering channel, the embodiments of the present application provide a double-channel filtering device.

[0053] The double-channel filtering device provided by the embodiments of the present application, as shown in Figures 1 to 5 The double-channel filtering device provided by the embodiments of the present application, as shown in

[0054] The double-channel filter comprises a first filter cylinder 2, a valve body 1 and a second filter cylinder 3 connected in sequence; the first filter cylinder 2 is provided with a first filter channel 201, and the second filter cylinder 3 is provided with a second filter channel 301;

[0055] The valve body 1 is of a hollow structure, and is provided with an inlet 101 and an outlet 102; the two ends of the first filter channel 201 of the first filter cylinder 2 are respectively communicated with the inlet 101 and the outlet 102, and the two ends of the second filter channel 301 of the second filter cylinder 3 are respectively communicated with the inlet 101 and the outlet 102;

[0056] A valve stem 12 is provided inside the valve body 1. The upper end of the valve stem 12 is connected to the connecting rod 73 of the pneumatic swing cylinder 7. The lower end of the valve stem 12 is provided with a first valve ball 15 and a second valve ball 17 connected to each other. The first valve ball 15 is provided with a first connecting channel 151, and the second valve ball 17 is provided with a second connecting channel 171.

[0057] Differential pressure detection component 8 is installed on the dual-channel filter to obtain the pressure difference between the fluid at the inlet 101 and the fluid at the outlet 102 of the filter, and to send a first control signal when the pressure difference is greater than a preset differential pressure threshold.

[0058] Each air inlet of the pneumatic swing cylinder 7 is connected to the air outlet of the solenoid valve 5. The solenoid valve 5 is used to change its air outlet based on the first control signal, thereby changing the air inlet position of the pneumatic swing cylinder 7 and causing the connecting rod 73 of the pneumatic swing cylinder 7 to rotate.

[0059] The rotation of the connecting rod 73 drives the valve stem 12 to rotate, which can give the valve stem 12 a first position and a second position;

[0060] When the valve stem 73 is in the first position, the first connecting channel 151 is connected to the inlet 101 and the inlet of the first filter channel 201, and the second connecting channel 171 is connected to the outlet 102 and the outlet of the first filter channel 201.

[0061] When the valve stem 73 is in the second position, the first connecting channel 151 is connected to the inlet 101 and the inlet of the second filter channel 301, and the second connecting channel 171 is connected to the outlet 102 and the outlet of the second filter channel 301.

[0062] Among them, reference Figure 1 As shown, the first valve ball 15 and the second valve ball 17 can be connected by a linkage rod 16.

[0063] In one embodiment, refer to Figure 1 As shown, the first valve ball 15 is provided with a first blind hole 152 and a second blind hole 153 that are interconnected. The center lines of the first blind hole 152 and the second blind hole 153 are perpendicular to each other, and the two are interconnected to form a first connecting channel 151.

[0064] The second valve ball 17 is provided with a third blind hole 172 and a fourth blind hole 173 that are interconnected. The center lines of the third blind hole 172 and the fourth blind hole 173 are perpendicular to each other and are interconnected to form a second connecting channel 171.

[0065] Reference Figure 1 As shown, in the filtration device of this utility model embodiment, the inlet 101 and outlet 102 of the first filtration channel 201 are provided with a first valve seat 14 for cooperating with the first valve ball 15.

[0066] The inlet 101 and the outlet 102 of the second filtering channel 301 are provided with a second valve seat 18 for cooperating with the second valve ball 17.

[0067] Further, the upper end of the valve rod 12 is provided with an upper end cover 13, the lower end of the upper end cover 13 abuts against the upper end of the valve body 1 in the installed state, and a sealing element 121 is arranged between the valve rod 12 and the valve body 1.

[0068] It should be noted that the specific structure of the differential pressure detection device is not limited in the embodiments of the present application, and can be selected according to actual needs, as long as the pressure difference between the inlet 101 fluid and the outlet 102 fluid of the filter can be obtained, and the corresponding control signal can be sent based on the calculation of the pressure difference and the preset pressure difference threshold.

[0069] In an embodiment, the differential pressure detection assembly 8 of the dual-channel filtering device is a differential pressure sensor (not shown in the figure),

[0070] The differential pressure sensor is in communication with the inlet 101 and the outlet 102 of the filter to detect the pressure difference between the inlet 101 fluid and the outlet 102 fluid, and send a first control signal when the pressure difference is greater than a preset pressure difference threshold.

[0071] Further, the dual-channel filter of the embodiments of the present application can further include a first safety alarm (not shown in the figure);

[0072] The first safety alarm is arranged on the dual-channel filter and is electrically connected with the differential pressure sensor;

[0073] Correspondingly, the differential pressure sensor also sends a second control signal when the pressure difference is greater than the preset pressure difference threshold; the first safety alarm is used to receive the second control signal and give a pre-warning based on the second control signal to prompt that the filter core of the filtering channel needs to be cleaned, so that the relevant staff can intuitively master the running state of the dual-channel and timely prompt the equipment maintenance.

[0074] For example, in another embodiment, referring to Figure 1 The differential pressure detection assembly 8 can include a first pressure sensor 801, a second pressure sensor 802 and a second safety alarm 803.

[0075] The first pressure sensor 801 is used to detect the inlet 101 fluid pressure, and the second pressure sensor 802 is used to detect the outlet 102 fluid pressure.

[0076] The second safety alarm 803 is electrically connected with the first pressure sensor 801 and the second pressure sensor 802 to receive the fluid pressure of the inlet 101 and the fluid pressure of the outlet 102, obtain the pressure difference between the fluid pressure of the inlet 101 and the fluid pressure of the outlet 102, and send a first control signal and give a safety warning when the pressure difference is greater than a preset difference threshold.

[0077] Wherein, the specific alarm form of the first safety alarm or the second safety alarm 803 is not limited in the embodiment of the utility model, and is selected according to actual needs, for example, can be setting light flickering, or can be alarm sound reminding, or light flickering and alarm sound reminding together.

[0078] Optionally, the specific connection form between the electromagnetic valve 5 and the pneumatic swing cylinder 7 is not limited in the embodiment of the utility model, and can be selected according to actual needs.

[0079] In an embodiment, the first gas inlet 71 of the pneumatic swing cylinder 7 and the first gas outlet 51 of the electromagnetic valve 5 are communicated through a connecting pipeline, and the second gas inlet 72 of the pneumatic swing cylinder 7 and the second gas outlet 52 of the electromagnetic valve 5 are communicated through a connecting pipeline.

[0080] In another embodiment, in order to make the structure more compact and reduce the overall space structure size of the device, referring to Figure 1 The filter device of the embodiment of the utility model further comprises a conversion module 6, the electromagnetic valve 5 and the pneumatic swing cylinder 7 are connected with different side walls of the conversion module 6 respectively.

[0081] Specifically, referring to Figure 7 The conversion module 6 is provided with a third gas inlet 61, a fourth gas inlet 62, a third gas outlet 63 and a fourth gas outlet 64, and the third gas inlet 61 is communicated with the third gas outlet 63, and the fourth gas inlet 62 is communicated with the fourth gas outlet 64.

[0082] The third gas inlet 61 is positionally corresponding and communicated with the first gas outlet 51 of the electromagnetic valve 5, the fourth gas inlet 62 is positionally corresponding and communicated with the second gas outlet 52 of the electromagnetic valve 5, the third gas outlet 63 is positionally corresponding and communicated with the first gas inlet 71 of the pneumatic swing cylinder 7, and the fourth gas outlet 64 is positionally corresponding and communicated with the second gas inlet 72 of the pneumatic swing cylinder 7.

[0083] Wherein, referring to Figure 6 And Figure 7As shown, the electromagnetic valve 5 is provided with a first mounting hole 53, the conversion module 6 is provided with a second mounting hole 65, and the pneumatic swing cylinder 7 is provided with a corresponding mounting hole (not marked in the figure), so that the electromagnetic valve 5, the conversion module 6 and the pneumatic swing cylinder 7 are fastened and connected by bolts passing through the corresponding mounting holes.

[0084] Optionally, the electromagnetic valve 5 in the embodiment of the utility model can be a 2-position 5-way electromagnetic valve 5.

[0085] Specifically, referring to Figure 2 and Figures 6 to 8 As shown, the specific rotation process of the pneumatic swing cylinder 7 in the embodiment of the utility model is described as follows: under the first control signal, after the electromagnetic valve coil of the electromagnetic valve 5 is powered on, the gas flowing through the electromagnetic valve 5 from the electromagnetic valve inlet 54 flows out from the first gas outlet 51 into the third inlet 61 of the conversion module 6, and then flows through the connecting channel between the third inlet 61 and the third outlet 63, and then enters the swing cylinder through the first inlet 71 of the pneumatic swing cylinder 7, drives the piston in the swing cylinder to rotate, at this time, the original gas in the pneumatic swing cylinder 7 is discharged from the second inlet 72 into the fourth inlet 62 of the conversion module 6, and then flows through the fourth inlet 62, and then flows out from the second outlet 52 of the electromagnetic valve 5, and then flows through the fourth outlet 64 of the conversion module 6, and then flows through the third outlet 63 of the conversion module 6, and then flows through the third inlet 61 of the conversion module 6, and then flows out from the first outlet 51 of the electromagnetic valve 5, and then flows through the second outlet 52 of the electromagnetic valve 5, and then flows out from the exhaust port 55, so as to realize the rotation of the connecting rod 73 of the swing cylinder and complete the switching of the filter channel.

[0086] Further, after the electromagnetic valve coil of the electromagnetic valve 5 is powered off, the gas flowing through the electromagnetic valve 5 from the electromagnetic valve inlet 54 flows out from the second outlet 52 into the fourth inlet 62 of the conversion module 6, and then flows through the connecting channel between the fourth inlet 62 and the fourth outlet 64, and then enters the swing cylinder through the second inlet 72 of the pneumatic swing cylinder 7, drives the piston in the swing cylinder to rotate, at this time, the original gas in the pneumatic swing cylinder 7 is discharged from the first inlet 71 into the third outlet 63 of the conversion module 6, and then flows through the third inlet 61, and then flows out from the first outlet 51 of the electromagnetic valve 5, and then flows through the second outlet 52 of the electromagnetic valve 5, and then flows out from the exhaust port 55, so as to realize the rotation of the connecting rod 73 of the swing cylinder and complete the switching of the filter channel.

[0087] It should be noted that the specific structure of the pneumatic swing cylinder can refer to the prior art, and this embodiment will not be described in detail.

[0088] Further, the filter device provided by the embodiment of the utility model, as shown in Figures 1 to 3 The lower end of the pneumatic swing cylinder 7 and the upper end of the valve body 1 are connected with the receiving support 9 through bolts.

[0089] The connecting rod 73 and the valve rod 12 are connected through the sleeve 10 and are fixed through the key.

[0090] Further, referring to Figure 1 and Figure 4 illustrated, the filter device of the embodiment of the utility model further can include: front end cover 4;

[0091] Wherein front end cover 4 is set up in the valve body 1 and is set up with the one end of inlet 101 and outlet 102, to be connected with the connecting pipeline of outside, and it is set up with through-hole at the position corresponding with inlet 101 and outlet 102.

[0092] Optionally, referring to Figure 1 Illustrated, the filter device provided by the embodiment of the utility model further can include handle 11;

[0093] One end of handle 11 is connected with valve stem 12, to drive the rotation of valve stem 12 by rotating handle 11, to facilitate switching the filter channel by manual operation in emergency, for example, in the case of electric control failure, to ensure normal production activities. Specifically, when handle 11 is connected, it can be screwed into valve stem 12 by thread.

[0094] The above-mentioned device of the embodiment of the utility model obtains the pressure difference between the fluid of filter inlet 101 and the fluid of outlet 102 through the differential pressure detection assembly arranged, and sends the first control signal to electromagnetic valve 5 in the case where the pressure difference is greater than the preset pressure difference threshold, and electromagnetic valve 5 can change the gas outlet according to the first control signal, and then change the air inlet of pneumatic swing cylinder 7, so that the stress direction of connecting rod 73 changes, and connecting rod 73 rotates, and the rotation of connecting rod 73 drives first valve ball 15 and second valve ball 17 of valve stem 12 to rotate together and then changes the filter channel of filter, that is, the automatic change of filter channel is realized in the case where the filter channel of filter is blocked, and the device realizes the switching of filter channel by controlling pneumatic swing cylinder 7 through electromagnetic valve 5, and the driving force is stable and the action is smooth.

[0095] And when the filter device switches the filter channel, first valve ball 15 and second valve ball 17 rotate together, which can close and open the inlet 101 and outlet 102 of the filter channel at the same time, and the action consistency is good.

[0096] It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary methods. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes can be rearranged while remaining within the scope of the present disclosure. The accompanying method claims present elements of the various steps in exemplary order and are not intended to be limited to the specific order or hierarchy presented.

[0097] In the detailed description above, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This method of disclosure, however, is not to be interpreted as reflecting a necessity that the claimed subject matter requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter can lie in fewer than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate preferred embodiment.

[0098] The foregoing description includes example of one or more embodiments. Of course, not all possible combinations of components or method steps are described in order to describe the above embodiments, but one of ordinary skill in the art will recognize that further combinations are possible. Therefore, the present embodiments are intended to encompass all such changes, modifications and variations as fall within the scope of the claims herein. Moreover, except to the extent necessary or inherent in the systems and methods described and claimed, the operations described herein need not be performed in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover, the described operations need not occur in every embodiment. Additionally, the described operations need not occur in the order described. Further, the described operations need not occur simultaneously. Moreover,

Claims

1. A dual pass filtration device, characterized in that, The utility model relates to a double -channel filter, differential pressure detection component, solenoid valve, pneumatic swing cylinder are provided. The double -channel filter includes first filter cartridge, valve body and second filter cartridge which are sequentially connected, the valve body is hollow structure, is provided with inlet and outlet, first filter cartridge's first filter channel's both ends are connected with inlet and outlet respectively, second filter cartridge's second filter channel's both ends are connected with inlet and outlet respectively, The valve body is provided with valve rod, the upper end of valve rod is connected with the connecting rod of pneumatic swing cylinder, and the lower end is provided with first valve ball and second valve ball which are connected, first valve ball is provided with first communication channel, second valve ball is provided with second communication channel, The differential pressure detection component is arranged on the double -channel filter to obtain the pressure difference between the inlet fluid and the outlet fluid of the filter, and sends a first control signal when the pressure difference is greater than a preset pressure difference threshold. The gas inlet of the pneumatic swing cylinder is connected with the gas outlet of the solenoid valve, and the solenoid valve is used to change the gas outlet based on the first control signal, thereby changing the gas inlet position of the pneumatic swing cylinder to make the connecting rod of the pneumatic swing cylinder rotate. The rotation of the connecting rod drives the rotation of the valve rod, so that the valve rod has a first position and a second position. When the valve rod is in the first position, the first communication channel is in communication with the inlet and the inlet of the first filter channel, and the second communication channel is in communication with the outlet and the outlet of the first filter channel. When the valve rod is in the second position, the first communication channel is in communication with the inlet and the inlet of the second filter channel, and the second communication channel is in communication with the outlet and the outlet of the second filter channel. The differential pressure detection component is a differential pressure sensor.

2. The apparatus of claim 1, wherein, The differential pressure sensor is in communication with the inlet and the outlet to detect the pressure difference between the inlet fluid and the outlet fluid, and sends a first control signal when the pressure difference is greater than a preset pressure difference threshold. Further comprising:

3. The apparatus of claim 2, wherein, A first safety alarm; The first safety alarm is arranged on the double -channel filter and is electrically connected with the differential pressure sensor; Correspondingly, the differential pressure sensor also sends a second control signal when the pressure difference is greater than a preset pressure difference threshold, and the first safety alarm is used to receive the second control signal and give a warning based on the second control signal. The differential pressure detection component includes a first pressure sensor, a second pressure sensor and a second safety alarm.

4. The apparatus of claim 1, wherein, The first pressure sensor is used to detect the inlet fluid pressure, and the second pressure sensor is used to detect the outlet fluid pressure. The second safety alarm is electrically connected with the first pressure sensor and the second pressure sensor to receive the inlet fluid pressure and the outlet fluid pressure, obtain the pressure difference between the inlet fluid pressure and the outlet fluid pressure, and send a first control signal and give a safety warning when the pressure difference is greater than a preset difference threshold. The first gas inlet of the pneumatic swing cylinder and the first gas outlet of the solenoid valve are connected by a connecting pipeline, and the second gas inlet of the pneumatic swing cylinder and the second gas outlet of the solenoid valve are connected by a connecting pipeline.

5. The apparatus of claim 1, wherein, Further comprising:

6. The apparatus of claim 1, wherein, ​ A conversion module; the electromagnetic valve and the pneumatic swing cylinder are connected with different side walls of the conversion module respectively; The conversion module is provided with a third air inlet, a fourth air inlet, a third air outlet and a fourth air outlet, and the third air inlet and the third air outlet are communicated, and the fourth air inlet and the fourth air outlet are communicated; The third air inlet corresponds to the first air outlet of the electromagnetic valve and is communicated with each other, the fourth air inlet corresponds to the second air outlet of the electromagnetic valve and is communicated with each other, the third air outlet corresponds to the first air inlet of the pneumatic swing cylinder and is communicated with each other, and the fourth air outlet corresponds to the second air inlet of the pneumatic swing cylinder and is communicated with each other.

7. The apparatus of claim 1, wherein, The first valve ball is provided with a first blind hole and a second blind hole which are communicated with each other, the center lines of the first blind hole and the second blind hole are perpendicular to each other, and the first blind hole and the second blind hole are communicated to form a first communication channel; The second valve ball is provided with a third blind hole and a fourth blind hole which are communicated with each other, the center lines of the third blind hole and the fourth blind hole are perpendicular to each other, and the third blind hole and the fourth blind hole are communicated to form a second communication channel.

8. The apparatus of claim 1, wherein, A bearing bracket is arranged between the pneumatic swing cylinder and the upper end of the valve body, and the lower end of the pneumatic swing cylinder and the upper end of the valve body are connected with the bearing bracket through bolts. The connecting rod and the valve rod are connected through a sleeve.

9. The apparatus of claim 1, wherein, The inlet and outlet positions of the first filter channel are provided with first valve seats for cooperating with the first valve ball; The inlet and outlet positions of the second filter channel are provided with second valve seats for cooperating with the second valve ball; The upper end of the valve rod is provided with an upper end cover, the lower end of the upper end cover abuts against the upper end of the valve body in the installed state, and a sealing element is arranged between the valve rod and the valve body.

10. The apparatus of any one of claims 1-9, wherein, Further comprising: A handle; One end of the handle is connected with the valve rod, so as to drive the rotation of the valve rod by rotating the handle.

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