A method for testing the air tightness of the inner wall components of a particle separator

Abstract

The present invention discloses a method for testing the air tightness of an inner wall component of a particle separator, comprising the following steps: S1, preparing an air tightness testing tool; S2, installing the inner wall component of the particle separator on the air tightness testing tool; S3, preparing a test air path component; S4, connecting an air outlet end of the test air path component to an air inlet in the air tightness testing tool, and communicating the air inlet in the air tightness testing tool with an inner cavity of the inner wall component of the particle separator; S5, inputting a test gas into the air inlet in the air tightness testing tool through the test air path component to perform an air tightness test; S6, disassembling the air tightness testing tool; the present invention is used to implement an air tightness test on the connection part of the inner and outer components in the inner wall component 1 of the particle separator, and the test is convenient.

Description

Technical Field

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

[0002] The particle separator is an engine air intake protection device that reduces the adverse effects of foreign matter such as sand, dust, ice, snow, and salt spray on the engine. The particle separator's inner wall assembly is a crucial component of the particle separator. However, existing technologies lack a method for testing the airtightness of the particle separator's inner wall assembly to assist in this process, which can easily affect the product's airtightness test results. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] The present invention is proposed in view of the above-mentioned and / or existing problems encountered in the airtightness test of the inner wall assembly of a particle separator.

[0005] Therefore, the purpose of the present invention is to provide an airtightness testing method for the inner wall assembly of a particle separator, in which the inner wall assembly of the particle separator in the section outside the connection part of the inner and outer components has good sealing performance with the tooling room, thereby ensuring the reliability of the airtightness testing of the connection part of the inner and outer 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: a method for testing the airtightness of an inner wall component of a particle separator, comprising the following steps:

[0007] S1. Prepare airtight test tooling;

[0008] S2. Install the particle separator inner wall assembly onto the airtightness test fixture;

[0009] S3, prepare to test the gas circuit components;

[0010] S4. Connect the air outlet of the test air path assembly to the air inlet in the airtight test fixture, and connect the air inlet in the airtight test fixture to the inner cavity of the particle separator inner wall assembly;

[0011] S5. Input the test gas into the air inlet of the air tightness test tooling through the test gas path assembly to perform an air tightness test;

[0012] S6. Disassemble the airtightness test tooling.

[0013] As a preferred solution of the airtightness testing method of the particle separator inner wall component in the present invention, wherein: the airtightness testing tooling includes an airtightness testing base, the upward end of the airtightness testing base is fixedly connected to 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, and a lower rubber sealing ring is connected to the sealing ring, the lower side of the lower rubber sealing ring is in contact with the upper side of the lower positioning step, and the outer ring of the lower part of the particle separator inner wall component presses the lower rubber sealing ring onto the sealing ring.

[0014] As a preferred solution of the airtightness testing method of the particle separator inner wall assembly 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 particle separator inner wall assembly is inserted into the sealing ring, the outer ring of the upper part of the particle separator inner wall assembly presses the upper rubber sealing ring against the inner edge of the sealing ring.

[0015] As a preferred solution of the airtightness testing method of the particle separator inner wall assembly in the present invention, wherein: the upper side of the sealing ring is detachably connected to a clamping flange, and the lower side of the clamping flange presses the upper rubber sealing ring against the outer ring of the particle separator inner wall assembly, and 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 ion separator inner wall assembly.

[0016] As a preferred solution of the airtightness testing method of the particle separator inner wall component in the present invention, the airtightness testing tool also includes an air intake component, the air intake component includes an air intake flange, an air intake hole is opened at the upward end of the air intake flange, and an air intake channel is opened in the radial direction of the air intake flange, which is connected to the air intake hole and extends toward the direction of the outer periphery of the air intake flange. The air intake flange is inserted into the inner side of the particle separator inner wall component, and a connecting step is fixed on the inner side of the upper part of the particle separator inner wall component, and a plurality of first upper connecting holes are arranged on the connecting step, and a plurality of second upper connecting holes corresponding to the first upper connecting holes are arranged at the downward end of the air intake flange. The lower side of the air intake flange is detachably connected to the upper end of the connecting step, and an air inlet connected to the air intake channel is opened on the particle separator inner wall component above the connecting step.

[0017] As a preferred solution of the air tightness testing method of the particle separator inner wall assembly in the present invention, wherein: an annular side sealing groove is opened on the outer periphery of the air inlet flange, an upper sealing ring is connected to the air inlet flange through the side sealing groove, the outer edge of the upper sealing ring is tightly attached to the inner edge of the particle separator inner wall assembly above the air inlet, an annular lower sealing groove is opened on the downward end of the air inlet flange, a lower sealing ring is connected to the air inlet flange through the lower sealing groove, and the bottom of the lower sealing ring is pressed tightly on the connecting step.

[0018] As a preferred solution of the airtightness test method of the inner wall component of the particle separator in the present invention, the airtightness test base includes a test base plate, a through hole is opened in the center of the test base plate, an annular outer connecting ring is fixed on the outer side of the test base plate, and the lower side of the sealing ring is in contact with the upper end of the outer connecting ring. A plurality of vertically arranged outer connecting holes are arranged on the outer connecting ring, and a plurality of outer connecting countersunk holes corresponding to the outer connecting holes are arranged on the downward end of the sealing ring. A limiting ring is fixed on the upper end of the test base plate. A number of inner support columns are arranged on the inner side of the limiting ring, and a circular inner support ring is fixed on the upper side of the inner support column. The outer ring of the inner support column and the outer ring of the inner support ring are coaxially arranged. The inner ring of the lower end of the inner wall component of the particle separator is just sleeved on the outer ring of the limiting ring. A number of connecting ears are arranged on the inner ring of the lower part of the inner wall component of the particle separator. There are fixing holes on the connecting ears, and the connecting ears are in contact with the upper side of the limiting ring. The air intake flange is just sleeved on the inner support ring and the inner support column. A number of internal connecting holes corresponding to the fixing holes are arranged on the limiting ring.

[0019] As a preferred solution of the air tightness testing method of the inner wall component of the particle separator in the present invention, wherein: the test air circuit component 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 the first air pipe, the first air pipe is connected to the pressure gauge, the end of the first air pipe away from the oil-water separator is connected to the first air valve, the output end of the first air valve is connected to the second air pipe, the second air pipe is connected to the air inlet, and the external air source is connected to the air inlet end of the first air valve.

[0020] As a preferred solution of the method for testing the airtightness of the inner wall component of the particle separator in the present invention, the step S2 is specifically as follows:

[0021] S201. Place the sealing ring in the mounting groove at the upper end of the outer connecting ring. Rotate the sealing ring to align the outer connecting hole with the outer connecting counterbore. Stop rotating the sealing ring and screw a first fixing bolt into the outer connecting hole and the connecting counterbore to securely connect the connecting ring to the outer support ring.

[0022] S202. Place the lower rubber sealing ring on the sealing ring from top to bottom. The lower rubber sealing ring contacts the upper side of the connecting step. When installing the product into the sealing ring, insert the long positioning rod into the inner connecting hole. Align the several fixing holes of the product with the long positioning rod one by one. Put the connecting ear on the long positioning rod. Move the product down along the long positioning rod. Press the product into the sealing ring. When the bottom of the product contacts the limiting ring, remove the long positioning rod. Use the connecting bolt to insert it into the inner connecting hole and the corresponding fixing hole from bottom to top. Screw on the connecting nut. The connecting nut contacts the upper side of the connecting ear. This achieves relative fixation between the product and the airtight test base.

[0023] S203. Use a short positioning rod to insert into the second upper connecting hole, align the first upper connecting hole with the corresponding second upper connecting hole, and put the air intake flange connected with the upper sealing ring and the lower sealing ring onto the short positioning rod. Press the air intake flange into the product. When the air intake flange is pressed tightly against the upper side of the connecting step, take out the short positioning rod, and use the second fixing bolt to insert 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 air intake flange, the fixing nut is screwed onto the second fixing bolt under the connecting step. When the fixing nut contacts the lower side of the connecting step, a fixed connection between the air intake assembly and the product is achieved.

[0024] As a preferred solution of the particle separator inner wall component airtightness test method of the present invention, step S5 is specifically as follows:

[0025] Open the first and second air valves, 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 and second air valves, and if the air pressure readings are stable, the air tightness test of the air circuit assembly is qualified;

[0026] Open the first and second air valves, adjust the airflow pressure through the oil-water separator, and after adjusting to the appropriate pressure, close the second air valve. If the pressure indicator does not drop, the product is airtight and go to step S6. Otherwise, it means that the product is airtight. Spray soapy water on the surface of the inner wall component of the particle separator and observe whether there are bubbles on the surface of the product to find the leak location. At the end of the test, flush the product with pure water to avoid soapy water residue.

[0027] Specifically, step S6 includes loosening the sealing ring from the outer connecting ring, adjusting the air circuit pressure to a set pressure threshold, opening the first air valve and the second air valve, using air pressure to blow up the upper rubber sealing ring in the sealing ring, removing the product from the bottom to the top of the base along the inner support column, loosening the second fixing bolt, and removing the air inlet flange upward.

[0028] Compared with the prior art, the present invention has the following technical effects: after the product is installed on the airtight test tooling, the air inlet and air outlet of the product are respectively closed by the air intake assembly and the sealing assembly, and the air intake assembly, the product and the sealing assembly cavity are connected, that is, this section is always in a sealed state, ensuring the effect of the product airtight test; through the method of the present invention for installing the product on the airtight test tooling, the product and the airtight test tooling are reliably installed, and the installation is convenient; the present invention is used to realize the airtightness test of the connection part of the inner and outer components in the inner wall assembly of the particle separator, and the test is convenient. After the test is completed, the upper rubber sealing ring is blown upward by the air flow pressure, which facilitates the removal of the product from the sealing ring and makes disassembly more convenient; it can be applied to the airtightness test of the connection part of the inner and outer components in the inner wall assembly of the particle separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0030] Figure 1 It is the front view of the present invention.

[0031] Figure 2 It is a top view of the present invention.

[0032] Figure 3 for Figure 2 The view from AA in the middle.

[0033] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0034] Figure 5 for Figure 3 A partial enlarged view of point C in the middle.

[0035] Figure 6 for Figure 3 A partial enlarged view of point D in the middle.

[0036] Figure 7 It is a three-dimensional structural diagram of the present invention.

[0037] Figure 8 for Figure 7 A partial enlarged view of point E in the middle.

[0038] Figure 9 It is a three-dimensional structural diagram of the test base in the present invention.

[0039] Figure 10 This is a three-dimensional structural diagram of the inner wall components of the particle separator.

[0040] Figure 11 Schematic diagram of the structure of the test gas circuit assembly in the present invention.

[0041] In the figure: 1 particle separator inner wall assembly, 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 fixture, 201 clamping flange, 201-1 fastening hole, 202 sealing ring, 202-1 fastening countersunk hole, 202-2 external connecting countersunk hole, 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 External connection hole, 2035-2 Mounting sink, 204 Fastening bolt, 205 Lower rubber sealing ring, 206 Upper rubber sealing ring, 207 Lower sealing ring, 208 Inlet flange, 208-1 Inlet hole, 208-2 Inlet channel, 208-3 Second upper connection hole, 209 Upper sealing ring, 210 Fixing nut, 211 Second fixing bolt, 212 Connecting bolt, X cavity, 3 Test gas path assembly, 301 First gas valve, 302 Oil-water separator, 303 First gas pipe, 304 Second gas valve, 305 Second gas pipe, 306 Pressure gauge. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0045] Example 1: Reference Figures 1 to 11 , which is the first embodiment of the present invention, provides an airtightness test method for the inner wall component of a particle separator, which can reliably realize the airtightness test of the inner wall component 1 of the particle separator.

[0046] A method for testing the air tightness of an inner wall component of a particle separator comprises the following steps:

[0047] S1. Prepare airtight test tool 2;

[0048] S2. Install the particle separator inner wall assembly 1 onto the airtightness test fixture 2;

[0049] S3, prepare to test gas circuit component 3;

[0050] S4. Connect the air outlet of the test air path assembly 3 to the air inlet 103 in the airtight test fixture 2, and connect the air inlet 103 in the airtight test fixture 2 to the inner cavity 102 of the particle separator inner wall assembly 1;

[0051] S5. Input test gas into the air inlet 103 of the airtightness test fixture 2 through the test air path assembly 3 to perform an airtightness test;

[0052] S6. Disassemble the airtightness test tooling.

[0053] Specifically, the airtight test fixture 2 includes an airtight test base 203, and the upward end of the airtight test base 203 is fixedly connected to a sealing component, and the sealing component includes a sealing ring 202, and 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 to the sealing ring 202, and the lower side of the lower rubber sealing ring 205 is in contact with the upper side of the lower positioning step. The outer ring of the lower part of the particle separator inner wall component 1 presses the lower rubber sealing ring 205 onto the sealing ring 202, and the upper inner side of the sealing ring 202 is plugged with an upper rubber sealing ring 206. After the particle separator inner wall component 1 is inserted into the sealing ring 202, the particle separator inner wall The outer ring on the upper part of component 1 presses the upper rubber sealing ring 206 onto the inner edge of the sealing ring 202. The upper side of the sealing ring 202 is detachably connected to a clamping flange 201. A number of fastening holes 201-1 are arranged on the clamping flange 201. The upward end of the sealing ring 202 is provided with a number of fastening countersunk holes 202-1 corresponding one to one to the fastening holes 201-1. The lower side of the clamping flange 201 presses the upper rubber sealing ring 206 onto the outer ring of the particle separator inner wall component 1. 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 ion separator inner wall component.

[0054] When the product is installed in the sealing ring 202, the clamping flange 201 is put onto the sealing ring 202, and the clamping flange 201 is pressed down to press the upper rubber sealing ring 206 against the outer ring of the product. The fastening bolts 204 are screwed into the fastening holes 201-1 and the fastening countersunk holes 202-1 to fix the clamping flange 201 on the sealing ring 202, thereby further fixing the upper rubber sealing ring 206 and improving the sealing performance of the connection between the product and the sealing ring 202.

[0055] Specifically, the airtight test fixture 2 also includes an air intake assembly, which includes an air intake flange 208, an air intake hole 208-1 is opened at the upper end of the air intake flange 208, and an air intake channel 208-2 is opened in the radial direction of the air intake flange 208, which is connected to the air intake hole 208-1 and extends toward the direction of the outer periphery of the air intake flange 208. The air intake flange 208 is plugged into the inner side of the particle separator inner wall assembly 1, and a connecting step 104 is fixed on the inner side of the upper part of the particle separator inner wall assembly 1. A plurality of first upper connecting holes 104-1 are arranged on the connecting step 104, and a plurality of second upper connecting holes 104-1 are arranged on the downward end of the air intake flange 208. Connecting hole 208-3, the lower side of the air inlet flange 208 is detachably connected to the upper end of the connecting step 104, and the particle separator inner wall component 1 above the connecting step 104 is provided with an air inlet 103 connected to the air inlet channel 208-2, and an annular side sealing groove is provided on the outer periphery of the air inlet flange 208, and the air inlet flange 208 is sleeved with an upper sealing ring 209 through the side sealing groove, and the outer edge of the upper sealing ring 209 is tightly attached to the inner edge of the particle separator inner wall component 1 above the air inlet 103, and an annular lower sealing groove is provided on the downward end of the air inlet flange 208, and the air inlet flange 208 is sleeved with a lower sealing ring 207 through the lower sealing groove, and the bottom of the lower sealing ring 207 is pressed tightly on the connecting step 104.

[0056] By jointly setting the air inlet assembly and the sealing assembly, it is ensured that there is a sealed cavity X between the air outlet of the product and the inner side of the sealing ring 202, thereby ensuring the accuracy of the product itself when performing air tightness testing.

[0057] Specifically, the airtight test base 203 includes a test base plate 2034, a through hole is opened in the center of the test base plate 2034, an annular outer connecting ring 2035 is fixed on the outside of the test base plate 2034, and the lower side of the sealing ring 202 is in contact with the upper end of the outer connecting ring 2035. A plurality of vertically arranged outer connecting holes 2035-1 are arranged on the outer connecting ring 2035, and a plurality of outer connecting countersunk holes 202-2 corresponding to the outer connecting holes 2035-1 are arranged on the downward end of the sealing ring 202. A limiting ring 2032 is fixed on the upper end of the test base plate 2034, and a plurality of inner support columns 2031 are arranged on the inner side of the limiting ring 2032. A circular inner support ring 2033 is fixed on the upper side of the support column 2031, and the outer ring of the inner support column 2031 and the outer ring of the inner support ring 2033 are coaxially arranged. The inner ring of the lower end of the particle separator inner wall component 1 is just sleeved on the outer ring of the limiting ring 2032. The inner ring of the lower part of the particle separator inner wall component 1 is arranged with a plurality of connecting ears 101, and the connecting ears 101 are provided with fixing holes 101-1. The connecting ears 101 are in contact with the upper side of the limiting ring 2032, and the air intake flange 208 is just sleeved on the inner support ring 2033 and the inner support column 2031. The limiting ring 2032 is provided with a plurality of inner connecting holes 2032-1 corresponding to the fixing holes 101-1.

[0058] The product is placed vertically downward into the sealing ring 202 along the coaxial inner support column 2031 and the outer ring of the inner support ring 2033. The product is always in 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, which ensures the installation position is accurate, eliminates airtightness problems that are not caused by the product, improves the sealing of the product when it is installed on the airtight test tooling 2, and ensures the airtightness test effect of the product.

[0059] Specifically, the test air circuit 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 the first air pipe 303, the first air pipe 303 is connected to the pressure gauge 306, the end of the first air pipe 303 away 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 the second air pipe 305, the second air pipe 305 is connected to the air inlet 208-1, and the external air source is connected to the air inlet end of the first air valve 301.

[0060] Air flow is injected into the sealed cavity X through the test air path component 3. The air flow only circulates in the closed cavity X and the sealed air pipe, further realizing the air tightness test of the particle separator inner wall component itself.

[0061] After the product is installed on the airtight test fixture 2, one end of the product (where the air inlet 103 is located) is connected to the test air path component 3, and the other end (i.e., the section where the air outlet is located) is connected to the sealed cavity X, that is, this section is always in a sealed state, ensuring the effect of the product airtightness test; the present invention is used to realize the airtightness test of the connection part of the inner and outer components in the particle separator inner wall component 1, and the test is convenient.

[0062] Example 2: Reference Figures 1 to 11 This embodiment provides an airtightness test method for the inner wall component 1 of a particle separator. The difference between this embodiment and embodiment 1 is that it can further realize the airtightness test of the product.

[0063] Specifically, step S2 is as follows:

[0064] S201. Place the sealing ring 202 in the mounting recess 2035-2 at the upper end of the outer connecting ring 2035. Rotate the sealing ring 202 to align the outer connecting hole 2035-1 with the outer connecting counterbore 202-2. Stop rotating the sealing ring 202 and screw the first fixing bolt into the outer connecting hole 2035-1 and the connecting counterbore to securely connect the connecting ring to the outer support ring.

[0065] S202, put the lower rubber sealing ring 205 on the sealing ring 202 from top to bottom, the lower rubber sealing ring 205 contacts the upper side of the connecting step 104, and when the product is installed in the sealing ring 202, put the upper rubber sealing ring 206 on the outer ring of the product, press the upper rubber sealing ring 206 down, and press the upper rubber sealing ring 206 to the outer ring of the product through the clamping flange 201, use the long positioning rod to insert it into the inner connecting hole 2032-1, and align the several fixing holes 101-1 of the product one by one. The long positioning rod and the connecting ear 101 are mounted 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 contacts the limiting ring 2032, the long positioning rod is removed and the connecting bolt 212 is inserted into the inner connecting hole 2032-1 and the corresponding fixing hole 101-1 from bottom to top. The connecting nut is screwed onto the connecting bolt 212 and the connecting nut contacts the upper side of the connecting ear 101 to achieve relative fixation between the product and the airtight test base 203.

[0066] S203. Use a short positioning rod to insert 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, and put the air intake flange 208 connected with the upper sealing ring 209 and the lower sealing ring 207 onto the short positioning rod. Press the air intake flange 208 into the product. When the air intake flange 208 is pressed tightly against the upper side of the connecting step 104, take out the short positioning rod, and use the second fixing bolt 211 to insert into the first upper connecting hole 104-1 and the second upper connecting hole 208-3 from top to bottom. When the second fixing bolt 211 is pressed tightly against the air intake flange 208, the fixing nut 210 is screwed onto the second fixing bolt 211 below the connecting step 104. When the fixing nut 210 contacts the lower side of the connecting step 104, the fixed connection between the air intake assembly and the product is achieved.

[0067] By using the method of installing the product on the airtight test fixture 2 in the present invention, reliable installation of the product and the airtight test fixture 2 is achieved, and the installation is convenient.

[0068] Step S5 specifically includes:

[0069] Open the first air valve 301 and the second air valve 304, and introduce gas into the first air valve 301 through an external air source. Adjust the air flow pressure through the oil-water separator 302, and 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 readings are stable, the air tightness test of the air circuit assembly 3 is qualified.

[0070] Open the first air valve 301 and the second air valve 304, adjust the air flow pressure through the oil-water separator 302, and 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 number does not drop, the air tightness of the product is good, and go to step S6. Otherwise, it means that the air tightness of the product is not good. Spray soapy water on the surface of the inner wall component 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 soapy water residue.

[0071] Step S6 specifically includes loosening the sealing ring 202 from the external connecting ring 2035, adjusting the air circuit pressure to the set pressure threshold, opening the first air valve 301 and the second air valve 304, using air pressure to blow up the upper rubber sealing ring 206 in the sealing ring, removing the product from the base 203 from the bottom to the top along the inner support column 2031, loosening the second fixing bolt 211 and taking out the air inlet flange 208 upward.

[0072] After the test is completed and the compression flange 201 is loosened, the upper rubber sealing ring 206 is blown upward by the air flow pressure, making it easier to remove the product from the sealing ring 202 and disassembly more convenient.

[0073] After ensuring that there is no problem with the sealing of the air path test component itself, gas is introduced into the inner cavity 102 of the product and the sealed cavity X to improve the accuracy of the air tightness test results.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for testing the airtightness of an inner wall component of a particle separator, characterized by: The following steps are included: S1. Prepare airtight test tooling (2); S2, installing the particle separator inner wall assembly (1) onto the airtightness test fixture (2); S3, prepare the test gas circuit assembly (3); S4, connecting the air outlet of the test air path assembly (3) to the air inlet (103) in the airtight test fixture (2), and communicating the air inlet (103) in the airtight test fixture (2) to the inner cavity (102) of the particle separator inner wall assembly (1); S5, inputting test gas into the air inlet (103) in the air tightness test tool (2) through the test air path assembly (3) to perform an air tightness test; S6. Disassemble the airtightness test tool (2); The airtight test fixture (2) comprises an airtight test base (203) and an air inlet assembly. The upward end of the airtight test base (203) is fixedly connected to a sealing assembly. The sealing assembly comprises 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 particle separator inner wall assembly (1) presses the lower rubber sealing ring (205) onto 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 particle separator inner wall component (1) is inserted into the sealing ring (202), the outer ring of the upper part of the particle separator inner wall component (1) presses the upper rubber sealing ring (206) onto the inner edge of the sealing ring (202). The upper side of the sealing ring (202) is detachably connected to a pressing flange (201). The lower side of the pressing flange (201) presses the upper rubber sealing ring (206) onto the outer ring of the particle separator inner wall component (1). The lower side of the upper rubber sealing ring (206) and the sealing ring ( A sealed cavity (X) is formed between the inner edge of the particle separator, the upper side of the lower rubber sealing ring (205), and the outer side of the inner wall component of the ion separator; the air intake component includes an air intake flange (208), an air intake hole (208-1) is opened at the upper end of the air intake flange (208), and an air intake channel (208-2) is opened in the radial direction of the air intake flange (208) and is connected to the air intake hole (208-1) and extends toward the direction of the outer periphery of the air intake flange (208). The air intake flange (208) is plugged into the inner side of the particle separator inner wall component (1), and the particle separator A connecting step (104) is fixed on the inner side of the upper part of the inner wall component (1), 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 one to one with the first upper connecting holes (104-1) are arranged on the downward 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), and an air inlet (103) communicating with the air inlet channel (208-2) is opened on the inner wall component (1) of the particle separator above the connecting step (104).

2. The particle separator inner wall assembly airtightness test method according to claim 1, characterized in that: An annular side sealing groove is formed on the outer periphery of the air inlet flange (208), and an upper sealing ring (209) is sleeved on the air inlet flange (208) through the side sealing groove. The outer edge of the upper sealing ring (209) is tightly attached to the inner edge of the particle separator inner wall component (1) above the air inlet (103). An annular lower sealing groove is formed on the downward end of the air inlet flange (208), and a lower sealing ring (207) is sleeved on the air inlet flange (208) through the lower sealing groove. The bottom of the lower sealing ring (207) is pressed tightly against the connecting step (104).

3. The particle separator inner wall assembly airtightness testing method according to claim 2, wherein: The airtight test base (203) comprises a test base plate (2034), a through hole is opened in the center of the test base plate (2034), an annular outer connecting ring (2035) tilted upward and outward is fixed on the outer side of the test base plate (2034), the lower side of the sealing ring (202) contacts the upper end of the outer connecting ring (2035), a plurality of vertically arranged outer connecting holes (2035-1) are arranged on the outer connecting ring (2035), a plurality of outer connecting countersunk holes (202-2) corresponding to the outer connecting holes (2035-1) are arranged on the downward end of the sealing ring (202), a limiting ring (2032) is fixed on the upper end of the test base plate (2034), a plurality of inner supporting columns (2031) are arranged on the inner side of the limiting ring (2032), and the inner supporting columns (2031) are arranged on the inner side of the limiting ring (2032). A circular inner support ring (2033) is fixed on the upper side of the column (2031); the outer ring of the inner support column (2031) and the outer ring of the inner support ring (2033) are coaxially arranged; the inner ring of the lower end of the particle separator inner wall component (1) is just sleeved on the outer ring of the limiting ring (2032); the inner ring of the lower part of the particle separator inner wall component (1) is arranged with a plurality of connecting ears (101); the connecting ears (101) are provided with fixing holes (101-1); the connecting ears (101) are in contact with the upper side of the limiting ring (2032); the air inlet flange (208) is just sleeved on the inner support ring (2033) and the inner support column (2031); the limiting ring (2032) is arranged with a plurality of inner connecting holes (2032-1) corresponding to the fixing holes (101-1).

4. The method for testing the airtightness of the inner wall assembly of a particle separator according to claim 3, wherein: The test gas circuit assembly (3) comprises 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 gas pipe (303); the first gas pipe (303) is connected to a pressure gauge (306); one end of the first gas pipe (303) away 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 gas pipe (305); the second gas pipe (305) is connected to the gas inlet (208-1); and an external gas source is connected to the gas inlet end of the first gas valve (301).

5. The airtightness testing method for the inner wall assembly of a particle separator according to claim 4, characterized in that: The step S2 is specifically as follows: S201, placing the sealing ring (202) in the mounting recess (2035-2) at the upper end of the outer connecting ring (2035), rotating the sealing ring (202) so that the outer connecting hole (2035-1) and the outer connecting recess (202-2) are aligned, stopping the rotation of the sealing ring (202), and using a first fixing bolt to screw into the outer connecting hole (2035-1) and the connecting recess to securely connect the connecting ring to the outer support ring; S202, put the lower rubber sealing ring (205) on the sealing ring (202) from top to bottom, the lower rubber sealing ring (205) contacts the upper side of the connecting step (104), and when the product is installed in the sealing ring (202), use a long positioning rod to insert 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, and the connecting ear (101) is sleeved on the long positioning rod. The product moves down along the long positioning rod, and the product is pressed into the sealing ring (202). When the bottom of the product contacts the limiting ring (2032), take out the long positioning rod, use the connecting bolt (212) to insert into the inner connecting hole (2032-1) and the corresponding fixing hole (101-1) from bottom to top in sequence, screw on the connecting nut, and the connecting nut contacts the upper side of the connecting ear (101), so as to achieve relative fixation of the product and the airtight test base (203); S203, use a short positioning rod to insert 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), put the air intake flange (208) connected with the upper sealing ring (209) and the lower sealing ring (207) onto the short positioning rod, press the air intake flange (208) into the product, when the air intake flange (208) is pressed against the upper side of the connecting step (104), remove the short positioning rod, use the second fixing bolt (211) to insert into the first upper connecting hole (104-1) and the second upper connecting hole (208-3) from top to bottom in sequence, when the second fixing bolt (211) is pressed against the air intake flange (208), the fixing nut (210) is screwed onto the second fixing bolt (211) below the connecting step (104), and when the fixing nut (210) contacts the lower side of the connecting step (104), the fixed connection between the air intake assembly and the product is achieved.

6. The method for testing the airtightness of the inner wall assembly of a particle separator according to claim 5, wherein: Step S5 specifically includes: Open the first air valve (301) and the second air valve (304), introduce 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), and if the air pressure readings are stable, the air tightness of the air circuit assembly (3) is tested to be qualified; Open the first air valve (301) and the second air valve (304), adjust the air flow pressure through the oil-water separator (302), and after adjusting to the appropriate pressure, close the second air valve (304). If the pressure indicator does not drop, the product has good air tightness, and go to step S6. Otherwise, it means that the product has poor air tightness. Spray soapy water on the surface of the particle separator inner wall component (1) and observe whether there are bubbles on the product surface to find the leak location. At the end of the test, flush the product with pure water to avoid soapy water residue. Specifically, step S6 comprises loosening the sealing ring (202) from the outer connecting ring (2035), adjusting the air circuit pressure to a set pressure threshold, opening the first air valve (301) and the second air valve (304), blowing up the upper rubber sealing ring (206) in the sealing ring (202) by air pressure, removing the product from the base from the bottom up along the inner support column (2031), loosening the second fixing bolt (211), and removing the air inlet flange (208) upward.

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