A detachable precision filtering device

Abstract

The present invention provides a detachable precision filtering device, comprising a filter body and a mounting plate, and also comprising an upper fixing module, a lower fixing module, a spring and a spring baffle, the upper fixing module and the lower fixing module respectively having a bending channel running through the inside; the lower fixing module is relatively fixed to the mounting plate, one end of the bending channel of the lower fixing module is communicated with the lower end of the filter body, and the other end is provided with an air inlet pipe, and the air inlet pipe runs through to the other side of the mounting plate; one end of the bending channel of the upper fixing module is communicated with the upper end of the filter body, and the other end is provided with an air outlet pipe, and the air outlet pipe runs through to the other side of the mounting plate; the spring baffle is located above the upper fixing module and is relatively fixed to the mounting plate, and the upper fixing module is fixedly connected to the mounting plate when the spring is kept in a compressed state, and the device removes the precision filter element by pressing the spring, thereby ensuring the air tightness of the pipeline, and the overall structure is externally mounted on the mounting plate, and there is no need to disassemble the chassis of the instrument itself, thereby facilitating maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of gas pretreatment in coal chemical and petrochemical production processes, and in particular to a detachable precision filtering device. Background Art

[0002] Before the process sample gas enters the instrument for detection, the sample must be fully filtered to meet the instrument's requirements for sample gas.

[0003] Most of the previous precision filters are connected in the instrument box through hoses. The condition of the filter element cannot be observed directly. If the filter element is saturated or blocked, it cannot be observed directly and replaced in time, and the sample gas cannot be effectively filtered. When replacing the filter element, it is easy to leak, which is inconvenient to maintain. In serious cases, it will endanger the safety performance of the equipment. Summary of the invention

[0004] The present invention provides a detachable precision filtering device, which can filter out liquid particles with very small particle sizes, improve the accuracy of online analysis of sample gas, and facilitate maintenance.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A detachable precision filtering device comprises a filter body and a mounting plate; it also comprises an upper fixed module, a lower fixed module, a spring and a spring baffle plate which are located on the same side of the mounting plate as the filter body; the upper fixed module and the lower fixed module respectively have a bending channel which passes through the inside; wherein the lower fixed module is relatively fixed to the mounting plate, one end of the bending channel of the lower fixed module is communicated with the lower end of the filter body, and the other end is fixedly provided with an air inlet pipe, and the air inlet pipe passes through the other side of the mounting plate; one end of the bending channel of the upper fixed module is communicated with the upper end of the filter body, and the other end is fixedly provided with an air outlet pipe, and the air outlet pipe passes through the other side of the mounting plate; a channel which allows the air outlet pipe to move up and down is provided on the mounting plate corresponding to the penetration position of the air outlet pipe; the spring baffle plate is located above the upper fixed module and is relatively fixed to the mounting plate, the upper end of the upper fixed module is connected to the spring baffle plate through a spring, and the upper fixed module is fixedly connected to the mounting plate when the spring remains in a compressed state.

[0007] Furthermore, the filter body is arranged in parallel with the mounting plate.

[0008] Furthermore, the bending channel of the upper / lower fixing module is bent at a right angle from one end to the other end.

[0009] Furthermore, the device also includes a protruding guide rail, which is fixedly connected to the mounting plate, and the air outlet pipe passes through the protruding guide rail to the other side of the mounting plate. The spring baffle is relatively fixed to the protruding guide rail, and the upper fixing module is fixedly connected to the protruding guide rail when the spring remains in a compressed state.

[0010] Furthermore, a step hole is provided at the joint between the upper fixing module and the upper end of the filter body for sealing and docking the two; a step hole is also provided at the joint between the lower fixing module and the lower end of the filter body for sealing and docking the two.

[0011] Furthermore, a first silicone O-type sealing ring is arranged between the upper fixing module and the upper end of the filter body; and a second silicone O-type sealing ring is arranged between the lower fixing module and the lower end of the filter body.

[0012] Furthermore, the width of the channel that allows the air outlet pipe to move up and down is equivalent to the outer diameter of the air outlet pipe, and the length direction of the channel passes through the upper end surface of the mounting plate.

[0013] Furthermore, the filter element of the filter body adopts a folded glass fiber microporous filter element.

[0014] Furthermore, the size of the glass fiber microporous filter element is outer diameter*height=40*98mm.

[0015] Furthermore, the specific connection modes of the relative fixation and fixed connection are both screw connections. Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention adopts upper and lower fixed modules, springs and spring baffles. The precision filter element can be removed by pressing the spring without changing the overall air path, which fully ensures the air tightness of the pipeline. The overall structure is hung on the mounting plate, and there is no need to disassemble the instrument chassis itself, which is convenient for maintenance.

[0017] 2. During maintenance, the precision filter element can be replaced without disassembling the inlet and outlet pipes, which not only ensures the precision filtration of the instrument, but also ensures the sealing of the gas pipeline, while reducing the maintenance frequency.

[0018] 3. The filter body and the upper and lower modules are sealed with a silicone O-ring, which is both corrosion-resistant and high-temperature-resistant, fully ensuring that the sample gas does not leak and the measurement is accurate.

[0019] 4. The sealing and installation performance have been greatly improved. Before the sample gas enters the detachable precision filtration device, the micro-particle liquid water or condensed water and micro-dust are deeply filtered on the periphery of the filter element by the folded filter membrane of the filter element to achieve the purpose of purifying the sample gas. It has strong versatility, small size, light weight and easy maintenance, thus ensuring the safe and reliable operation of the sample processing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 A schematic diagram of the overall structure of the detachable precision filtering device provided by the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the middle protruding guide rail from another perspective;

[0023] The meanings of the figures are as follows:

[0024] 1-upper fixing module, 2-filter body, 3-mounting plate, 4-inlet pipe, 5-outlet pipe, 6-lower fixing module, 7-spring, 8-spring baffle, 9-silicone O-ring, 10-protruding guide rail. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Although the existing filter device can filter dust and liquid particles, the purification rate does not meet the specified standards, and it is extremely inconvenient to install and replace, and it is impossible to visually observe the filtering degree and contamination degree of the filter element. It is impossible to estimate whether to replace the filter element, which may extend the use time of the filter element, resulting in insufficient final filtration of the sample gas, which directly affects the measurement results.

[0027] To this end, the detachable precision filtering device provided by the present invention can visually and clearly observe the filter element and replace it in time, which can fully ensure the purity of the final sample gas, achieve high-quality detection, and effectively improve the stability of the detection instrument.

[0028] Figure 1 This is a schematic diagram of the overall structure of the detachable precision filtering device provided by the present invention. Figure 2 for Figure 1 Another structural diagram of the protruding guide rail is shown in FIG. Figure 1 , Figure 2As shown: The present invention adopts the following technical solution:

[0029] A detachable precision filtering device, comprising a filter body 2 and a mounting plate 3; also comprising an upper fixing module 1, a lower fixing module 6, a spring 7 and a spring baffle 8 which are located on the same side of the mounting plate 3 as the filter body 2; the upper fixing module 1 and the lower fixing module 6 respectively have a bending channel which passes through the inside; wherein the lower fixing module 6 is relatively fixed to the mounting plate 3, one end of the bending channel of the lower fixing module 6 is communicated with the lower end of the filter body 2, and the other end is fixedly provided with an air inlet pipe 4, and the air inlet pipe 4 passes through the other side of the mounting plate 3; one end of the bending channel of the upper fixing module 1 is communicated with the upper end of the filter body 2, and the other end is fixedly provided with an air outlet pipe 5, and the air outlet pipe 5 passes through the other side of the mounting plate 3; a channel which allows the air outlet pipe 5 to move up and down is provided on the mounting plate 3 corresponding to the penetration position of the air outlet pipe 5; the spring baffle 8 is located above the upper fixing module 1 and is relatively fixed to the mounting plate 3, the upper end of the upper fixing module 1 is connected to the spring baffle 8 through the spring 7, and the upper fixing module 1 is fixedly connected to the mounting plate 3 when the spring 7 remains in a compressed state. The filter body 2 is arranged in parallel with the mounting plate 3. The bending channel of the upper / lower fixing module is bent at a right angle from one end to the other end. The device also includes a protruding guide rail 10, which is fixedly connected to the mounting plate 3, and the air outlet pipe 5 passes through the protruding guide rail 10 to the other side of the mounting plate 3. The spring baffle 8 is relatively fixed to the protruding guide rail 10, and the upper fixing module 1 is fixedly connected to the protruding guide rail 10 when the spring 7 is kept in a compressed state. A step hole is provided at the upper end of the upper fixing module 1 and the filter body 2 for sealing and docking; a step hole is also provided at the lower end of the lower fixing module 6 and the filter body 2 for sealing and docking. A first silicone O-type sealing ring 9 is provided between the upper fixing module 1 and the upper end of the filter body 2; a second silicone O-type sealing ring 9 is provided between the lower fixing module 6 and the lower end of the filter body 2. The channel that allows the air outlet pipe 5 to move up and down has a width equivalent to the outer diameter of the air outlet pipe, and its length direction passes through the upper end surface of the mounting plate 3. The filter element of the filter body 2 is a folded glass fiber microporous filter element. The size of the glass fiber microporous filter element is outer diameter*height=40*98mm. The specific connection methods of the relative fixation and fixed connection are both screw connection.

[0030] The present invention adopts a folded glass fiber microporous filter element, which has the following advantages: ① Large membrane filtration area. ② High filtration accuracy: The filtration accuracy of the folded filter element can be 0.5um, which is practical. ③ Strong dirt holding capacity, high interception rate, and long service life. The device adopts a mounting plate with a protruding guide rail and an upper and lower filter fixing module. On the basis of not changing the overall gas path, the precision filter element can be disassembled by pressing the spring, which fully guarantees the air tightness of the pipeline. The overall structure adopts an external installation method, and there is no need to disassemble the instrument chassis itself. In terms of maintenance, it can be said to be twice the result with half the effort. It can not only facilitate the observation of the internal filter element filtering situation, but also facilitate the detachability of the filter and the installation panel. The replacement of the precision filter element can be implemented without disassembling the inlet and outlet nozzle joint pipelines. This feature not only ensures the precision filtration of the instrument but also ensures the sealing of the gas path pipeline, while reducing the maintenance frequency. The filter element and the upper and lower modules are sealed with a silicone O-ring. It is both corrosion-resistant and high-temperature resistant, fully ensuring the characteristics of no leakage of sample gas and accurate measurement.

[0031] During operation, when the sample gas that has passed the primary filtration enters the device from the gas pipeline, it passes through the air inlet pipe and then the folded glass fiber microporous filter element. At this time, the dust particles and liquid particles are blocked due to the adsorption and isolation properties of the filter element material, and the tiny particles are intercepted, and the pure sample gas is transported to the device to be tested through the air outlet, completing the last level of filtration.

[0032] This device uses a protruding guide rail to cooperate with the upper / lower fixing modules of the filter body for installation and disassembly. We use bolts to fix the lower fixing module to the mounting plate, and then place the filter body at the opening of the lower fixing module, and use an O-ring to seal the airtightness between the two. Finally, the upper fixing module is pressed onto the upper interface of the precision filter, and the airtightness with the upper fixing module is also sealed with an O-ring. When the spring compression reaches an extreme state, the spring baffle and the protruding guide rail are fixed with bolts to maintain the constant compression of the spring. During disassembly, you only need to loosen the connection between the spring plate and the guide rail of the mounting plate. The upper fixing module will automatically rebound according to the compression of the spring, and the filter body can be easily removed. This disassembly solution does not change the air inlet and outlet, and does not require the disassembly of the chassis structure, which can maintain the airtightness of the device for a long time.

[0033] This device firstly redesigns the existing filter installation structure to a certain extent, and the sealing is properly solved. Before the sample gas enters the detection device, the micro-particle liquid water or condensed water and micro-dust are deeply filtered on the outer periphery of the filter element by the folded filter membrane of the filter element to achieve the purpose of purifying the gas. Its purification rate can reach more than 99%. It can filter dust (0.5μm) and prevent liquid mist from passing through. It is not afraid of the occasional "liquid escape" of the sample gas. It is an ideal post-stage sample gas processing component.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A detachable precision filtering device, comprising a filter body and a mounting plate; characterized in that: The filter press is a bottom surface of the filter element, and the filter element has a bottom surface that is fixed to the filter element, and a bottom surface that is fixed to the filter element is provided with a spring, and the top surface of the filter element is provided with a spring. The device also includes a protruding guide rail, which is fixedly connected to the mounting plate, the air outlet pipe passes through the protruding guide rail to the other side of the mounting plate, the spring baffle is relatively fixed to the protruding guide rail, and the upper fixing module is fixedly connected to the protruding guide rail when the spring is kept in a compressed state; The bending channel of the upper / lower fixing module is bent at a right angle from one end to the other end; the filter body is arranged parallel to the mounting plate; The filter element of the filter body adopts a folded glass fiber microporous filter element; The specific connection methods of the relative fixation and fixed connection both adopt screw connection.

2. The detachable precision filtering device according to claim 1, characterized in that: The upper end of the upper fixing module and the filter body is provided with a step hole at the joint, which is used for the sealed joint between the two; the lower end of the lower fixing module and the filter body is also provided with a step hole at the joint, which is used for the sealed joint between the two.

3. The detachable precision filtering device according to claim 2, characterized in that: A first silicone O-type sealing ring is arranged between the upper fixing module and the upper end of the filter body; and a second silicone O-type sealing ring is arranged between the lower fixing module and the lower end of the filter body.

4. The detachable precision filtering device according to claim 3, characterized in that: The width of the hole that allows the air outlet pipe to move up and down is equivalent to the outer diameter of the air outlet pipe, and the length direction of the hole passes through the upper end surface of the mounting plate.

5. The detachable precision filtering device according to claim 1, characterized in that: The size of the glass fiber microporous filter element is outer diameter*height=40*98mm.

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