Airtight test method for inner wall assembly of particle separator

Abstract

The invention discloses an air tightness test method for an inner wall assembly of a particle separator. The air tightness test method comprises the following steps: S1, preparing an air tightness test tool; s2, the particle separator inner wall assembly is installed on an air tightness test tool; s3, preparing a test gas circuit assembly; s4, connecting a gas outlet end of the test gas circuit assembly with a gas inlet in an airtight test tool, wherein the gas inlet in the airtight test tool is communicated with an inner cavity of the particle separator inner wall assembly; s5, testing gas is input into a gas inlet in the airtightness testing tool through the testing gas circuit assembly, and airtightness testing is carried out; s6, disassembling the airtightness test tool; the air tightness test of the connection part of the internal and external parts in the inner wall assembly 1 of the particle separator is realized, and the test is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of airtight testing, in particular to an airtight testing method for the inner wall assembly of a particle separator. Background Art

[0002] The particle separator is an engine intake protection device that reduces the adverse effects of foreign substances such as sand and dust, ice and snow, and salt spray on the engine. The inner wall assembly of the particle separator is an important part of the particle separator. In the prior art, there is a lack of an airtightness testing method for the inner wall assembly of the particle classifier to assist in the airtightness testing of the inner wall assembly of the particle classifier, which is likely to affect the airtightness testing results of the product. Summary of the Invention

[0003] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the above and / or existing problems in the airtight testing of the inner wall assembly of the particle separator, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide an airtight testing method for the inner wall assembly of a particle separator, with good sealing between the inner wall assembly of the particle separator and the tooling in the section outside the connection part of the internal and external components, ensuring the reliability of the airtightness testing of the connection part of the internal and external components of the inner wall assembly of the particle separator.

[0006] To solve the above technical problems, the present invention provides the following technical solution: an airtight testing method for the inner wall assembly of a particle separator, comprising the following steps: S1. Prepare an airtight testing tooling; S2. Install the inner wall assembly of the particle separator onto the airtight testing tooling; S3. Prepare a test gas circuit assembly; S4. Connect the outlet end of the test gas circuit assembly to the inlet port in the airtight testing tooling, and the inlet port in the airtight testing tooling is communicated with the inner cavity of the inner wall assembly of the particle separator; S5. Input test gas into the inlet port in the airtight testing tooling through the test gas circuit assembly for airtight testing; S6. Disassemble the airtight testing tooling.

[0007] As a preferred embodiment of the airtight test method for the inner wall component of the particle separator in the present invention, the airtight test tooling includes an airtight test base. One end of the airtight test base facing upward is fixedly connected with a sealing component. The sealing component includes a sealing ring. The inner edge of the lower end of the sealing ring has a lower positioning step. A lower rubber sealing ring is connected inside the sealing ring. The lower side of the lower rubber sealing ring abuts against the upper side of the lower positioning step. The outer ring of the lower part of the inner wall component of the particle separator presses the lower rubber sealing ring against the sealing ring.

[0008] As a preferred embodiment of the airtight test method for the inner wall component of the particle separator in the present invention, an upper rubber sealing ring is inserted into the inner side of the upper part of the sealing ring. After the inner wall component of the particle separator is inserted into the sealing ring, the outer ring of the upper part of the inner wall component of the particle separator presses the upper rubber sealing ring against the inner edge of the sealing ring.

[0009] As a preferred embodiment of the airtight test method for the inner wall component of the particle separator in the present invention, a pressing flange is detachably connected to the upper side of the sealing ring. The lower side of the pressing flange presses the upper rubber sealing ring against the outer ring of the inner wall component of the particle separator. A sealed cavity is formed between the lower side of the upper rubber sealing ring, the inner edge of the sealing ring, the upper side of the lower rubber sealing ring, and the outer side of the inner wall component of the ion separator.

[0010] As a preferred embodiment of the airtight test method for the inner wall component of the particle separator in the present invention, the airtight test tooling further includes an air inlet component. The air inlet component includes an air inlet flange. An air inlet hole is opened at one end of the air inlet flange facing upward. An air inlet channel communicating with the air inlet hole and extending in the radial direction of the air inlet flange towards the outer periphery of the air inlet flange is opened on the air inlet flange. The air inlet flange is inserted into the inner side of the inner wall component of the particle separator. A connecting step is fixed on the inner side of the upper part of the inner wall component of the particle separator. A plurality of first upper connecting holes are arranged on the connecting step. A plurality of second upper connecting holes corresponding to the first upper connecting holes one by one are arranged at the lower end of the air inlet flange. The lower side of the air inlet flange is detachably connected to the upper end of the connecting step. An air inlet communicating with the air inlet channel is opened on the inner wall component of the particle separator above the connecting step.

[0011] As a preferred embodiment of the airtight test method for the inner wall component of the particle separator in the present invention, an annular side sealing sunk groove is opened on the outer periphery of the air inlet flange. The air inlet flange is sleeved with an upper sealing ring through the side sealing sunk groove. The outer edge of the upper sealing ring is tightly attached to the inner edge of the inner wall component of the particle separator above the air inlet. An annular lower sealing sunk groove is opened at the lower end of the air inlet flange. The air inlet flange is sleeved with a lower sealing ring through the lower sealing sunk groove. The bottom of the lower sealing ring is pressed against the connecting step.

[0012] As a preferred embodiment of the airtightness test method for the inner wall assembly of the particle separator in the present invention, the airtightness test base includes a test bottom plate with a through hole at the center. An annular outer connection ring that slopes upward and outward is fixed to the outside of the test bottom plate. The lower side of the sealing ring abuts against the upper end of the outer connection ring. A number of vertically arranged outer connection holes are arranged on the outer connection ring, and a number of outer connection counterbores corresponding to the outer connection holes one by one are arranged at the downward end of the sealing ring. A limiting ring is fixed to the upper end of the test bottom plate. A number of inner support columns are arranged inside the limiting ring. An inner support ring in the shape of a circular ring is fixed to the upper side of the inner support columns. The outer circles of the inner support columns and the inner support ring are coaxially arranged. The lower inner circle of the inner wall assembly of the particle separator just sleeved on the outer circle of the limiting ring. A number of connecting ears are arranged on the inner circle of the lower part of the inner wall assembly of the particle separator, and fixing holes are opened on the connecting ears. The connecting ears abut against the upper side of the limiting ring. The intake flange just sleeved on the inner support ring and the inner support columns. A number of inner connection holes corresponding to the fixing holes one by one are arranged on the limiting ring.

[0013] As a preferred embodiment of the airtightness test method for the inner wall assembly of the particle separator in the present invention, the test gas path assembly includes a first air valve, a second air valve, an oil-water separator and a pressure gauge. The output end of the first air valve is connected to the oil-water separator. The output end of the oil-water separator is connected to a first air pipe. A pressure gauge is connected to the first air pipe. One end of the first air pipe far from the oil-water separator is connected to a first air valve. The output end of the first air valve is connected to a second air pipe. The second air pipe is connected to the air intake hole. The external air source is connected to the intake end of the first air valve.

[0014] As a preferred embodiment of the airtightness test method for the inner wall assembly of the particle separator in the present invention, step S2 specifically is S201. Place the sealing ring in the installation counterbore at the upward end of the outer connection ring. Rotate the sealing ring to align the outer connection holes and the outer connection counterbores. Stop rotating the sealing ring. Use the first fixing bolt to screw into the outer connection holes and the connection counterbores to fixedly connect the connection ring to the outer support ring. S202. Place the lower rubber sealing ring on the sealing ring from top to bottom. The lower rubber sealing ring abuts against the upper side of the connection step. When installing the product into the sealing ring, use the long positioning rod to insert into the inner connection hole. A number of fixing holes of the product are aligned with the long positioning rod one by one. The connecting ears are sleeved on the long positioning rod. The product moves down along the long positioning rod. The product is pressed into the sealing ring. When the bottom of the product abuts against the limiting ring, take out the long positioning rod. Use the connecting bolt to insert into the inner connection hole and the corresponding fixing hole from bottom to top in sequence. Screw on the connecting nut. The connecting nut abuts against the upper side of the connecting ear to realize the relative fixation of the product and the airtightness test base. S203. Insert a short positioning rod into the second upper connecting hole, align the first upper connecting hole with the corresponding second upper connecting hole, put the intake flange connected with the upper sealing ring and the lower sealing ring onto the short positioning rod, press the intake flange into the product. When the intake flange is pressed tightly against the upper side of the connecting step, take out the short positioning rod. Insert the second fixing bolt into the first upper connecting hole and the second upper connecting hole in sequence from top to bottom. When the second fixing bolt is pressed tightly against the intake flange, screw the fixing nut onto the second fixing bolt below the connecting step. When the fixing nut abuts against the lower side of the connecting step, the fixed connection between the intake assembly and the product is realized.

[0015] As a preferred solution of the airtightness test method for the inner wall assembly of the particle separator in the present invention, wherein: step S5 is specifically as follows. Open the first air valve and the second air valve, introduce gas into the first air valve through an external air source, adjust the air flow pressure through the oil-water separator, observe the air flow pressure in the first air pipe through the pressure gauge, close the air source, the first air valve and the second air valve. If the air pressure reading is stable, the airtightness of the test air circuit assembly is qualified. Open the first air valve and the second air valve, adjust the air flow pressure through the oil-water separator. After adjusting to the appropriate pressure, close the second air valve. If the pressure gauge reading does not drop, the airtightness of the product is good, and go to step S6. Otherwise, it means that the airtightness of the product is not good. Spray soapy water on the surface of the inner wall assembly of the particle separator and observe whether there are bubbles on the product surface to find the air leakage position. At the end of the test, flush the product with pure water to avoid the residue of soapy water. The specific content of step S6 is as follows: Loosen the sealing ring from the outer connecting ring, adjust the air pressure in the air circuit to the set pressure threshold, open the first air valve and the second air valve, use the air pressure to blow up the upper rubber sealing ring in the sealing ring, take the product off the base from bottom to top along the inner support column, and loosen the second fixing bolt to take out the intake flange upward.

[0016] Compared with the prior art, the present invention has the following technical effects: After the product is installed on the airtightness test tooling, the air inlet and outlet of the product are respectively closed by the intake assembly and the sealing assembly. The cavities of the intake assembly, the product and the sealing assembly are connected, that is, this section is always in a sealed state, ensuring the effect of the airtightness test of the product; Through the method of installing the product on the airtightness test tooling in the present invention, the reliable installation of the product and the airtightness test tooling is realized, and the installation is convenient; Using the present invention to realize the airtightness test of the connection part between the internal and external components in the inner wall assembly of the particle separator, the test is convenient. At the end of the test, use the air flow pressure to blow up the upper rubber sealing ring upward, which is convenient for the product to be taken out of the sealing ring, and the disassembly is more convenient; It can be applied to the work of the airtightness test of the connection part between the internal and external components in the inner wall assembly of the particle separator. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them: Figure 1 This is the front view of the present invention.

[0018] Figure 2 This is the top view of the present invention.

[0019] Figure 3 Is Figure 2 The end view at A - A in

[0020] Figure 4 Is Figure 3 The partial enlarged view at B in

[0021] Figure 5 Is Figure 3 The partial enlarged view at C in

[0022] Figure 6 Is Figure 3 The partial enlarged view at D in

[0023] Figure 7 This is the three - dimensional structure diagram of the present invention.

[0024] Figure 8 Is Figure 7 The partial enlarged view at E in

[0025] Figure 9 This is the three - dimensional structure diagram of the test base in the present invention.

[0026] Figure 10 This is the three - dimensional structure diagram of the inner wall assembly of the particle separator.

[0027] Figure 11 This is the structural schematic diagram of the test gas path assembly in the present invention.

[0028] In the figure: 1 Inner wall assembly of particle separator, 101 Connecting ear, 101-1 Fixing hole, 102 Inner cavity, 103 Air inlet, 104 Connecting step, 104-1 First upper connecting hole, 2 Airtight test tooling, 201 Compression flange, 201-1 Fastening hole, 202 Sealing ring, 202-1 Fastening counterbore, 202-2 Outer connecting counterbore, 203 Airtight test base, 2031 Inner support column, 2032 Limiting ring, 2032-1 Inner connecting hole, 2033 Inner support ring, 2034 Test base plate, 2035 Outer connecting ring, 2035-1 Outer connecting hole, 2035-2 Installation counterbore, 204 Fastening bolt, 205 Lower rubber sealing ring, 206 Upper rubber sealing ring, 207 Lower sealing ring, 208 Air inlet flange, 208-1 Air inlet hole, 208-2 Air inlet channel, 208-3 Second upper connecting hole, 209 Upper sealing ring, 210 Fixing nut, 211 Second fixing bolt, 212 Connecting bolt, X Cavity, 3 Test gas circuit assembly, 301 First gas valve, 302 Oil-water separator, 303 First air pipe, 304 Second gas valve, 305 Second air pipe, 306 Pressure gauge. Detailed implementation manners

[0029] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings of the specification.

[0030] In the following description, many specific details are set forth to facilitate a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0032] Example 1: Refer to Figures 1 to 11 , which is the first embodiment of the present invention. This embodiment provides a method for airtight testing of the inner wall assembly of a particle separator, which can reliably achieve the airtightness test of the inner wall assembly 1 of the particle separator.

[0033] A method for airtight testing of the inner wall assembly of a particle separator includes the following steps: S1. Prepare the airtight test tooling 2; S2. Install the inner wall assembly 1 of the particle separator onto the airtight test tooling 2; S3. Prepare the test gas circuit assembly 3; S4. Connect the outlet end of the test gas circuit assembly 3 to the inlet port 103 in the airtight test fixture 2, and the inlet port 103 in the airtight test fixture 2 communicates with the inner cavity 102 of the inner wall assembly 1 of the particle separator; S5. Input test gas into the inlet port 103 in the airtight test fixture 2 through the test gas circuit assembly 3 to conduct an airtight test; S6. Disassemble the airtight test fixture.

[0034] Specifically, the airtight test fixture 2 includes an airtight test base 203. A sealing component is fixedly connected to the upward end of the airtight test base 203. The sealing component includes a sealing ring 202. The inner edge of the lower end of the sealing ring 202 has a lower positioning step. A lower rubber sealing ring 205 is connected inside the sealing ring 202. The lower side of the lower rubber sealing ring 205 abuts against the upper side of the lower positioning step. The outer ring of the lower part of the inner wall assembly 1 of the particle separator presses the lower rubber sealing ring 205 against the sealing ring 202. An upper rubber sealing ring 206 is inserted into the inner side of the upper part of the sealing ring 202. After the inner wall assembly 1 of the particle separator is inserted into the sealing ring 202, the outer ring of the upper part of the inner wall assembly 1 of the particle separator presses the upper rubber sealing ring 206 against the inner edge of the sealing ring 202. A pressing flange 201 is detachably connected to the upper side of the sealing ring 202. A number of fastening holes 201-1 are arranged on the pressing flange 201. A number of fastening counterbores 202-1 corresponding to the fastening holes 201-1 one by one are arranged on the upward end of the sealing ring 202. The lower side of the pressing flange 201 presses the upper rubber sealing ring 206 against the outer ring of the inner wall assembly 1 of the particle separator. A sealed cavity X is formed between the lower side of the upper rubber sealing ring 206, the inner edge of the sealing ring 202, the upper side of the lower rubber sealing ring 205 and the outer side of the inner wall assembly of the ion separator.

[0035] When the product is installed in the sealing ring 202, the pressing flange 201 is sleeved on the sealing ring 202, and the pressing flange 201 is pressed down so that the upper rubber sealing ring 206 is pressed against the outer ring of the product. The fastening bolt 204 is screwed into the fastening hole 201-1 and the fastening counterbore 202-1 to fix the pressing flange 201 on the sealing ring 202, further realizing the fixation of the upper rubber sealing ring 206 and improving the sealing performance of the connection between the product and the sealing ring 202 at the same time.

[0036] Specifically, the airtight test tooling 2 further includes an air intake assembly. The air intake assembly includes an air intake flange 208. An air intake hole 208-1 is formed at the upward end of the air intake flange 208. An air intake channel 208-2 that communicates with the air intake hole 208-1 and extends in the radial direction of the air intake flange 208 toward the outer periphery of the air intake flange 208 is formed on the radial direction of the air intake flange 208. The air intake flange 208 is inserted inside the inner wall assembly 1 of the particle separator. A connecting step 104 is fixed to the inner side of the upper part of the inner wall assembly 1 of the particle separator. A number of first upper connecting holes 104-1 are arranged on the connecting step 104. A number of second upper connecting holes 208-3 corresponding to the first upper connecting holes 104-1 one by one are arranged at the downward end of the air intake flange 208. The lower side of the air intake flange 208 is detachably connected to the upper end of the connecting step 104. An air intake port 103 that communicates with the air intake channel 208-2 is formed on the inner wall assembly 1 of the particle separator above the connecting step 104. An annular side sealing groove is formed on the outer periphery of the air intake flange 208. An upper sealing ring 209 is sleeved on the air intake flange 208 through the side sealing groove. The outer edge of the upper sealing ring 209 is pressed against the inner edge of the inner wall assembly 1 of the particle separator above the air intake port 103. An annular lower sealing groove is formed at the downward end of the air intake flange 208. A lower sealing ring 207 is sleeved on the air intake flange 208 through the lower sealing groove. The bottom of the lower sealing ring 207 is pressed against the connecting step 104.

[0037] Through the combined setting of the air intake assembly and the sealing assembly, it is ensured that the cavity X between the air outlet of the product and the inner side of the sealing ring 202 is a sealed cavity, ensuring the accuracy when the product conducts the airtightness test itself.

[0038] Specifically, the airtight test base 203 includes a test bottom plate 2034. A through hole is formed at the center of the test bottom plate 2034. An annular outer connecting ring 2035 that is upward and outward inclined is fixed on the outside of the test bottom plate 2034. The lower side of the sealing ring 202 abuts against the upper end of the outer connecting ring 2035. A number of vertically arranged outer connecting holes 2035-1 are arranged on the outer connecting ring 2035. A number of outer connecting sunk holes 202-2 corresponding to the outer connecting holes 2035-1 one by one are arranged at the downward end of the sealing ring 202. A limiting ring 2032 is fixed to the upper end of the test bottom plate 2034. A number of inner support columns 2031 are arranged on the inner side of the limiting ring 2032. A circular inner support ring 2033 is fixed to the upper side of the inner support columns 2031. The outer circle of the inner support columns 2031 and the outer circle of the inner support ring 2033 are coaxially arranged. The lower inner circle of the inner wall assembly 1 of the particle separator just sleeves on the outer circle of the limiting ring 2032. A number of connecting ears 101 are arranged on the inner circle of the lower part of the inner wall assembly 1 of the particle separator. Fixing holes 101-1 are formed on the connecting ears 101. The connecting ears 101 abut against the upper side of the limiting ring 2032. The air intake flange 208 just sleeves on the inner support ring 2033 and the inner support columns 2031. A number of inner connecting holes 2032-1 corresponding to the fixing holes 101-1 one by one are arranged on the limiting ring 2032.

[0039] The product is vertically placed downward along the outer circles of the coaxial inner support column 2031 and the inner support ring 2033 into the sealing ring 202. The product is always at the center of the airtight test base 203. At the same time, the sealing ring 202 is concentric with the inner support column 2031. The structure is simple and reliable, making the installation position accurate, eliminating the airtightness problems caused by non-product reasons, improving the sealing performance when the product is installed on the airtight test tooling 2, and ensuring the airtightness test effect of the product.

[0040] Specifically, the test gas path assembly 3 includes a first gas valve 301, a second gas valve 304, an oil-water separator 302, and a pressure gauge 306. The output end of the first gas valve 301 is connected to the oil-water separator 302. The output end of the oil-water separator 302 is connected to a first air pipe 303. A pressure gauge 306 is connected to the first air pipe 303. One end of the first air pipe 303 far from the oil-water separator 302 is connected to the first gas valve 301. The output end of the first gas valve 301 is connected to a second air pipe 305. The second air pipe 305 is connected to the air inlet hole 208-1. The external gas source is connected to the inlet end of the first gas valve 301.

[0041] Airflow is injected into the sealed cavity X through the test gas path assembly 3. The airflow only circulates in the closed cavity X and the sealed air pipe, further realizing the airtightness test of the inner wall assembly of the particle separator itself.

[0042] After the product is installed on the airtight test tooling 2, one end of the product (the position where the air inlet 103 is located) is communicated with the test gas path assembly 3, and the other end (the section where the air outlet is located) is communicated with the sealed cavity X, that is, this section is always in a sealed state, ensuring the airtightness test effect of the product; using the present invention to realize the airtightness test of the connection part between the internal and external components in the inner wall assembly 1 of the particle separator, and the test is convenient.

[0043] Embodiment 2: Refer to Figures 1 to 11 , this embodiment provides a method for testing the airtightness of the inner wall assembly 1 of a particle separator. The difference from Embodiment 1 is that it can further realize the airtightness test of the product.

[0044] Specifically, step S2 is specifically as follows S201. The sealing ring 202 is placed in the installation sink 2035-2 at the upward end of the outer connection ring 2035. The sealing ring 202 is rotated to align the outer connection hole 2035-1 and the outer connection sink hole 202-2. Stop rotating the sealing ring 202. Use the first fixing bolt to screw into the outer connection hole 2035-1 and the connection sink hole to fixedly connect the connection ring to the outer support ring; S202. Place the lower rubber sealing ring 205 on the sealing ring 202 from top to bottom. The lower rubber sealing ring 205 abuts against the upper side of the connecting step 104. When installing the product into the sealing ring 202, fit the upper rubber sealing ring 206 onto the outer ring of the product, press down the upper rubber sealing ring 206, and use the compression flange 201 to press the upper rubber sealing ring 206 tightly against the outer ring of the product. Insert a long positioning rod into the inner connecting hole 2032-1. Align the several fixing holes 101-1 of the product with the long positioning rod one by one. The connecting ear 101 is sleeved on the long positioning rod. The product moves down along the long positioning rod and is pressed into the sealing ring 202. When the bottom of the product abuts against the limiting ring 2032, remove the long positioning rod. Insert the connecting bolt 212 from bottom to top into the inner connecting hole 2032-1 and the corresponding fixing hole 101-1 in sequence. Screw on the connecting nut on the connecting bolt 212. The connecting nut abuts against the upper side of the connecting ear 101 to realize the relative fixation of the product and the airtight test base 203. S203. Insert a short positioning rod into the second upper connecting hole 208-3. Align the first upper connecting hole 104-1 with the corresponding second upper connecting hole 208-3. Fit the air inlet flange 208 connected with the upper sealing ring 209 and the lower sealing ring 207 onto the short positioning rod. Press the air inlet flange 208 into the product. When the air inlet flange 208 is tightly pressed against the upper side of the connecting step 104, remove the short positioning rod. Insert the second fixing bolt 211 from top to bottom into the first upper connecting hole 104-1 and the second upper connecting hole 208-3 in sequence. When the second fixing bolt 211 is pressed tightly against the air inlet flange 208, screw the fixing nut 210 onto the second fixing bolt 211 below the connecting step 104. When the fixing nut 210 abuts against the lower side of the connecting step 104, realize the fixed connection between the air inlet assembly and the product.

[0045] Through the method of installing the product onto the airtight test tooling 2 in the present invention, the reliable installation of the product and the airtight test tooling 2 is realized, and the installation is convenient.

[0046] Step S5 is specifically as follows. Open the first air valve 301 and the second air valve 304. Pass gas into the first air valve 301 through an external air source. Adjust the air flow pressure through the oil-water separator 302. Observe the air flow pressure in the first air pipe 303 through the pressure gauge 306. Close the air source, the first air valve 301 and the second air valve 304. If the air pressure reading is stable, the airtightness of the test air circuit assembly 3 is qualified. Open the first air valve 301 and the second air valve 304, adjust the air flow pressure through the oil-water separator 302. After adjusting to the appropriate pressure, close the second air valve 304, and introduce gas into the inner cavity 102 of the product. If the pressure indication does not drop, the airtightness of the product is good, and proceed to step S6; otherwise, it indicates that the airtightness of the product is not good. Sprinkle soapy water on the surface of the inner wall assembly 1 of the particle separator, and observe whether there are bubbles on the surface of the product to find the leakage location. At the end of the test, rinse the product with pure water to avoid the residue of soapy water.

[0047] Step S6 is specifically as follows: Loosen the sealing ring 202 from the outer connecting ring 2035, adjust the air path pressure to the set pressure threshold, open the first air valve 301 and the second air valve 304, and use air pressure to blow up the upper rubber sealing ring 206 inside the sealing ring. Remove the product from the base 203 upward along the inner support column 2031, and loosen the second fixing bolt 211 to take out the intake flange 208 upward.

[0048] After the test is completed, after loosening the compression flange 201, use the air flow pressure to blow up the upper rubber sealing ring 206 upward, which is convenient for taking out the product from the sealing ring 202 and is more convenient for disassembly.

[0049] After ensuring that there is no problem with the airtightness of the air path test assembly itself, then introduce gas into the inner cavity 102 of the product and the sealed cavity X to improve the accuracy of the airtightness test result.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for airtight testing of the inner wall assembly of a particle separator, characterized in that: including the following steps, S1. Prepare the airtight test tooling (2); S2. Install the inner wall assembly (1) of the particle separator onto the airtight test tooling (2); S3. Prepare the test gas path assembly (3); S4. Connect the outlet end of the test gas path assembly (3) to the air inlet (103) in the airtight test tooling (2), and the air inlet (103) in the airtight test tooling (2) communicates with the inner cavity (102) of the inner wall assembly (1) of the particle separator; S5. Input test gas into the air inlet (103) in the airtight test tooling (2) through the test gas path assembly (3) to conduct an airtight test; S6. Disassemble the airtight test tooling (2); The airtight test tooling (2) includes an airtight test base (203). One end of the airtight test base (203) facing upward is fixedly connected with a sealing assembly. The sealing assembly includes a sealing ring (202). The inner edge of the lower end of the sealing ring (202) has a lower positioning step. A lower rubber sealing ring (205) is connected inside the sealing ring (202). The lower side of the lower rubber sealing ring (205) abuts against the upper side of the lower positioning step. The outer ring of the lower part of the inner wall assembly (1) of the particle separator presses the lower rubber sealing ring (205) against the sealing ring (202).

2. The airtight test method for the inner wall assembly of the particle separator according to claim 1, characterized in that: An upper rubber sealing ring (206) is inserted into the upper inner side of the sealing ring (202). After the inner wall assembly (1) of the particle separator is inserted into the sealing ring (202), the outer ring of the upper part of the inner wall assembly (1) of the particle separator presses the upper rubber sealing ring (206) against the inner edge of the sealing ring (202).

3. The airtightness test method for the inner wall assembly of the particle separator according to claim 2, characterized in that: A pressing flange (201) is detachably connected to the upper side of the sealing ring (202). The lower side of the pressing flange (201) presses the upper rubber sealing ring (206) against the outer ring of the inner wall assembly (1) of the particle separator. A sealed cavity (X) is formed between the lower side of the upper rubber sealing ring (206), the inner edge of the sealing ring (202), the upper side of the lower rubber sealing ring (205), and the outer side of the inner wall assembly of the ion separator.

4. The airtightness test method for the inner wall assembly of the particle separator according to claim 3, characterized in that: The airtight test tooling (2) further includes an air inlet assembly. The air inlet assembly includes an air inlet flange (208). One end of the air inlet flange (208) facing upward is provided with an air inlet hole (208-1). An air inlet channel (208-2) communicating with the air inlet hole (208-1) and extending in the direction of the outer circumference of the air inlet flange (208) is provided in the radial direction of the air inlet flange (208). The air inlet flange (208) is inserted inside the inner wall assembly (1) of the particle separator. A connecting step (104) is fixed to the inner side of the upper part of the inner wall assembly (1) of the particle separator. A plurality of first upper connecting holes (104-1) are arranged on the connecting step (104). A plurality of second upper connecting holes (208-3) corresponding to the first upper connecting holes (104-1) one by one are arranged at the lower end of the air inlet flange (208). The lower side of the air inlet flange (208) is detachably connected to the upper end of the connecting step (104). An air inlet (103) communicating with the air inlet channel (208-2) is provided on the inner wall assembly (1) of the particle separator above the connecting step (104).

5. The airtightness test method for the inner wall assembly of the particle separator according to claim 4, characterized in that: An annular side seal sink is formed on the outer periphery of the intake flange (208). The intake flange (208) is sleeved with an upper sealing ring (209) through the side seal sink. The outer edge of the upper sealing ring (209) is tightly attached to the inner edge of the inner wall assembly (1) of the particle separator above the air inlet (103). An annular lower seal sink is formed at the lower end of the intake flange (208). The intake flange (208) is sleeved with a lower sealing ring (207) through the lower seal sink. The bottom of the lower sealing ring (207) is pressed tightly on the connection step (104).

6. The airtightness test method for the inner wall assembly of the particle separator according to claim 5, characterized in that: The airtight test base (203) includes a test bottom plate (2034). A through hole is formed in the center of the test bottom plate (2034). An annular outer connection ring (2035) that slopes upward and outward is fixed on the outside of the test bottom plate (2034). The lower side of the sealing ring (202) abuts against the upper end of the outer connection ring (2035). A number of vertically arranged outer connection holes (2035-1) are arranged on the outer connection ring (2035). A number of outer connection sink holes (202-2) corresponding to the outer connection holes (2035-1) one by one are arranged at the lower end of the sealing ring (202). A limit ring (2032) is fixed on the upper end of the test bottom plate (2034). A number of inner support columns (2031) are arranged inside the limit ring (2032). An annular inner support ring (2033) is fixed on the upper side of the inner support columns (2031). The outer circles of the inner support columns (2031) and the outer circle of the inner support ring (2033) are coaxially arranged. The lower inner circle of the inner wall assembly (1) of the particle separator is just sleeved on the outer circle of the limit ring (2032). A number of connecting ears (101) are arranged on the inner circle of the lower part of the inner wall assembly (1) of the particle separator. Fixing holes (101-1) are formed in the connecting ears (101). The connecting ears (101) abut against the upper side of the limit ring (2032). The intake flange (208) is just sleeved on the inner support ring (2033) and the inner support columns (2031). A number of inner connection holes (2032-1) corresponding to the fixing holes (101-1) one by one are arranged on the limit ring (2032).

7. The airtight test method for the inner wall assembly of the particle separator according to claim 6, characterized in that: The test gas path assembly (3) includes a first air valve (301), a second air valve (304), an oil-water separator (302), and a pressure gauge (306). The output end of the first air valve (301) is connected to the oil-water separator (302). The output end of the oil-water separator (302) is connected to a first air pipe (303). A pressure gauge (306) is connected to the first air pipe (303). The end of the first air pipe (303) far from the oil-water separator (302) is connected to the first air valve (301). The output end of the first air valve (301) is connected to a second air pipe (305). The second air pipe (305) is connected to the air inlet hole (208-1). An external air source is connected to the intake end of the first air valve (301).

8. The airtightness test method for the inner wall assembly of the particle separator according to claim 7, characterized in that: The specific content of step S2 is as follows: S201. Place the sealing ring (202) in the mounting sink (2035-2) at the upward end of the outer connection ring (2035). Rotate the sealing ring (202) to align the outer connection hole (2035-1) with the outer connection counterbore (202-2). Stop rotating the sealing ring (202). Use the first fixing bolt to screw into the outer connection hole (2035-1) and the connection counterbore to fixedly connect the connection ring to the outer support ring. S202. Place the lower rubber sealing ring (205) on the sealing ring (202) from top to bottom. The lower rubber sealing ring (205) abuts against the upper side of the connection step (104). When installing the product into the sealing ring (202), insert the long positioning rod into the inner connection hole (2032-1). Align the several fixing holes (101-1) of the product with the long positioning rod one by one. The connection ear (101) is sleeved on the long positioning rod. The product moves down along the long positioning rod and is pressed into the sealing ring (202). When the bottom of the product abuts against the limit ring (2032), take out the long positioning rod. Use the connection bolt (212) to sequentially insert into the inner connection hole (2032-1) and the corresponding fixing hole (101-1) from bottom to top, and screw on the connection nut. The connection nut abuts against the upper side of the connection ear (101) to realize the relative fixation of the product and the airtight test base (203). S203. Insert the short positioning rod into the second upper connection hole (208-3). Align the first upper connection hole (104-1) with the corresponding second upper connection hole (208-3). Sleeve the intake flange (208) connected with the upper sealing ring (209) and the lower sealing ring (207) onto the short positioning rod. The intake flange (208) is pressed into the product. When the intake flange (208) is tightly pressed against the upper side of the connection step (104), take out the short positioning rod. Use the second fixing bolt (211) to sequentially insert into the first upper connection hole (104-1) and the second upper connection hole (208-3) from top to bottom. When the second fixing bolt (211) is tightly pressed against the intake flange (208), screw the fixing nut (210) onto the second fixing bolt (211) below the connection step (104). When the fixing nut (210) abuts against the lower side of the connection step (104), realize the fixed connection of the intake component and the product.

9. The airtightness test method for the inner wall assembly of the particle separator according to claim 8, characterized in that: Step S5 specifically is Open the first air valve (301) and the second air valve (304). Pass gas into the first air valve (301) through an external air source. Adjust the air flow pressure through the oil-water separator (302). Observe the air flow pressure in the first air pipe (303) through the pressure gauge (306). Close the air source, the first air valve (301) and the second air valve (304). If the air pressure reading is stable, the airtightness of the test air circuit component (3) is qualified. Open the first air valve (301) and the second air valve (304), adjust the air flow pressure through the oil-water separator (302). After adjusting to the appropriate pressure, close the second air valve (304). If the pressure gauge reading does not drop, the airtightness of the product is good, and proceed to step S6. Otherwise, it indicates that the airtightness of the product is not good. Spray soapy water on the surface of the inner wall assembly (1) of the particle separator and observe whether there are bubbles on the surface of the product to find the leakage location. At the end of the test, flush the product with pure water to avoid the residue of soapy water. The specific content of step S6 is as follows: Loosen the sealing ring (202) from the outer connecting ring (2035), adjust the air path pressure to the set pressure threshold, open the first air valve (301) and the second air valve (304), use the air pressure to blow up the upper rubber sealing ring (206) inside the sealing ring (202), remove the product from the base upward along the inner support column (2031), and loosen the second fixing bolt (211) to take out the intake flange (208) upward.

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