A sandblasting process and sandblasting protection device for a nozzle assembly

Abstract

The present invention discloses a sandblasting process and a sandblasting protection device for a nozzle assembly. The sandblasting process of the nozzle assembly uses a sandblasting protection device for the nozzle assembly, including the steps of: the component to be protected on the nozzle assembly mounting plate is protected and circumferentially clamped, and the floating support mechanism at the lower part of the mounting plate supports the lower part of the nozzle assembly and then performs sandblasting. The lower part of the nozzle assembly is supported on the mounting plate through the floating support mechanism, and the protection component protects and circumferentially clamps the outer periphery and inner diameter of the axial end face of the nozzle assembly, solving the problem that when the inner diameter of the nozzle assembly is small and irregular, it is impossible to obtain a force application point on the inner wall of the nozzle assembly for sandblasting the protection of the axial end face.

Description

Technical Field

[0001] The present invention relates to a sandblasting process and a sandblasting protection device for a nozzle assembly, belonging to the technical field of sandblasting processes and sandblasting devices. Background Art

[0002] When the shaft end face of the nozzle assembly of an aeroengine is connected and sealed, in order to ensure good sealing performance after the nozzle assembly end face is connected to the docking part, it is necessary to perform sandblasting treatment on the shaft end face of the nozzle assembly. In order to avoid damage to other end face parts of the nozzle assembly caused by sandblasting, it is necessary to protect the nozzle assembly through a protection device before performing the subsequent sandblasting process.

[0003] In a pipeline flange nozzle sandblasting protection and plugging device with the Chinese patent publication number CN205572195U, the disclosed technical solution is as follows: the force-bearing support installed on the central threaded rod presses against the inner wall of the pipeline, and then forms a frictional force with the inner wall of the pipeline through the rubber anti-slip block to assist in locking. Tighten the first locking nut, and the silica gel pad tightly fits against the flange sealing surface. Although the force-bearing support presses against the inner wall of the pipeline and the first locking nut makes the silica gel pad tightly fit against the flange sealing surface to protect the pipeline flange nozzle, when the inner diameter of the nozzle assembly is small and irregular, there is a problem that it is impossible to obtain a force-bearing point on the inner wall of the nozzle assembly to protect the shaft end face for sandblasting. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a sandblasting process for a nozzle assembly.

[0005] The present invention also provides a sandblasting protection device for a nozzle assembly.

[0006] The present invention is achieved through the following technical solutions.

[0007] A sandblasting process for a nozzle assembly provided by the present invention uses a sandblasting protection device for a nozzle assembly, including the steps of protecting and circumferentially pressing the component to be protected on the nozzle assembly mounting plate, and sandblasting after the floating support mechanism below the mounting plate supports the lower part of the nozzle assembly.

[0008] A sandblasting protection device for a nozzle assembly includes:

[0009] A bracket and a mounting plate, the mounting plate is mounted on the bracket;

[0010] A protection component for protecting the outer circumference and inner diameter of the shaft end face of the nozzle assembly is mounted on the mounting plate, and the protection component circumferentially presses the nozzle assembly on the mounting plate; a floating support mechanism for supporting the lower part of the nozzle assembly is mounted below the mounting plate.

[0011] The bracket is provided with round holes, and the two diagonally arranged round holes are used to correspondingly install positioning posts and diamond pins; the bracket is provided with a supporting surface with a groove, and the supporting surface is used for horizontally placing the mounting plate.

[0012] Bolts A, washers and nuts are installed on the bracket, and the device is fixed on the sandblasting equipment through bolts A, washers and nuts of the bracket.

[0013] A handle is installed on the outer peripheral surface of the mounting plate; positioning pin holes are provided on the mounting plate, a hook hole is provided on the mounting plate to cooperate with a hook, a sandblasting test piece is tightly installed on the mounting plate through the hook and a nut, and a positioning pin B is installed in the positioning pin hole to position the sandblasting test piece.

[0014] The mounting plate is provided with a stepped hole for installing an opening elastic sleeve and a nozzle assembly, and a round hole for screwing in a compression screw is provided on the side surface of the mounting plate;

[0015] The protection component includes: a baffle detachably fixed on the mounting plate;

[0016] An opening elastic sleeve installed in the stepped hole on the mounting plate;

[0017] A bushing installed in the round hole, a compression screw is screwed into the bushing, and after the compression screw is screwed in, it abuts against the opening elastic sleeve to clamp the outer periphery of the shaft end of the nozzle assembly in the stepped hole of the mounting plate;

[0018] A protection plate located in the middle of the baffle and installable on the inner diameter of the shaft end of the nozzle assembly;

[0019] A positioning mandrel located in the middle of the protection plate and installable on the inner diameter of the shaft end of the nozzle assembly, and the positioning mandrel positions the protection plate.

[0020] A cylindrical pin is installed on the mounting plate to limit the nozzle assembly.

[0021] The floating support mechanism includes: a screw rod screwed and fixed on the mounting plate;

[0022] A spring telescopically and slidably sleeved on the smooth rod section of the screw rod;

[0023] A pressing plate sleeved on the smooth rod section of the screw rod below the spring, a guiding hole on the pressing plate is slidably sleeved on the smooth rod section of the lower part of the screw rod, and the supporting surface of the pressing plate supports the lower part of the nozzle assembly;

[0024] A knurled nut screwed and fixed with the threaded section of the screw rod.

[0025] The beneficial effects of the present invention are as follows: The nozzle assembly is supported on the mounting plate through a floating support mechanism below, and the protection assembly protects the outer periphery and inner diameter of the axial end face of the nozzle assembly and circumferentially compresses it, solving the problem that when the inner diameter of the nozzle assembly is small and irregular, it is impossible to obtain a stress point on the inner wall of the nozzle assembly for sandblasting the protection of the axial end face. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a cross-sectional view of the device of the present invention;

[0027] Figure 2 is a top view of the present invention;

[0028] Figure 3 is Figure 1 a schematic cross-sectional view along line A-A in

[0029] Figure 4 a schematic cross-sectional view of the bracket of the present invention;

[0030] Figure 5 a schematic cross-sectional view of the mounting plate of the present invention;

[0031] Figure 6 a top view schematic of the mounting plate of the present invention;

[0032] Figure 7 a schematic cross-sectional view of the pressing plate of the present invention;

[0033] Figure 8 a schematic cross-sectional view of the protection plate of the present invention;

[0034] In the figure: 1 - bracket; 11 - positioning hole; 12 - mounting groove; 13 - round hole; 14 - supporting surface; 2 - mounting plate; 21 - positioning pin hole; 22 - hook hole; 23 - round hole; 24 - stepped hole; 3 - pressing plate; 31 - guiding hole; 32 - supporting surface; 4 - screw; 5 - baffle; 6 - open elastic sleeve; 7 - protection plate; 71 - fitting surface; 72 - guiding sliding hole; 8 - positioning mandrel; 9 - positioning pin A; 10 - hook; 141 - bolt A; 15 - washer; 16 - nut; 17 - knurled nut; 18 - spring; 221 - cylindrical pin; 231 - bolt B; 241 - cylindrical pin; 131 - positioning pin B; 121 - diamond pin. DETAILED DESCRIPTION OF THE INVENTION

[0035] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0036] As Figures 1 to 8 shown.

[0037] A sandblasting protection device for a nozzle assembly of the present application includes:

[0038] A bracket 1 with a concave space inside and a mounting plate 2. The mounting plate 2 is mounted on the bracket 1. The bracket 1 is provided with a positioning hole 11, and the bracket 1 determines the installation position of the device on the sandblasting equipment through the positioning hole 11; the bracket 1 is provided with a mounting groove 12, and the bracket 1 presses the device on the sandblasting equipment through the mounting groove 12; the bracket 1 is provided with circular holes 13, and the two circular holes 13 are arranged diagonally to correspondingly mount positioning posts 9 and diamond pins 121; the bracket 1 is provided with a supporting surface 14 with a groove, and the supporting surface 14 is used to horizontally place the mounting plate 2; bolts A141, washers 15 and nuts 16 are mounted on the bracket 1, and the device is fixed on the sandblasting equipment through the bolts A141, washers 15 and nuts 16 of the bracket 1. A passage for operators to enter is provided on the side of the bracket 1.

[0039] A protection component for protecting the outer circumference and inner diameter of the shaft end face of the nozzle assembly 50 is mounted on the mounting plate 2, and the protection component circumferentially presses the nozzle assembly 50 on the mounting plate 2; a floating support mechanism for supporting the lower part of the nozzle assembly 50 is mounted below the mounting plate 2.

[0040] The lower part of the nozzle assembly 50 is supported on the mounting plate 2 through the floating support mechanism, and the protection component protects the outer circumference and inner diameter of the shaft end face of the nozzle assembly 50 and circumferentially presses it, solving the problem that when the inner diameter of the nozzle assembly is small and irregular, there is no force point on the inner wall of the nozzle assembly to perform sandblasting on the protection of the shaft end face.

[0041] A handle 25 is mounted on the outer peripheral surface of the mounting plate 2, which is convenient to mount the mounting plate 2 on the bracket 1 through the handle 25.

[0042] The mounting plate 2 is provided with a positioning pin hole 21, the mounting plate 2 is provided with a hook hole 22 to cooperate with a hook 10, a sandblasting test piece 51 is tightly mounted on the mounting plate 2 through the hook 10 and a nut 19, and a positioning pin B131 is mounted in the positioning pin hole 21 to position the sandblasting test piece 51. The sandblasting test piece 51 performs trial sandblasting when the baffle 5 is not removed after the nozzle assembly 50 is installed, ensuring that the operating parameters of the sandblasting equipment are adjusted to meet the parameter requirements for sandblasting the shaft end face of the nozzle assembly 50.

[0043] The mounting plate 2 is provided with a stepped hole 24 for mounting an opening elastic sleeve 6 and the nozzle assembly 50, and a circular hole 23 for the pressing screw 20 to be screwed in is provided on the side of the mounting plate 2;

[0044] The protection component includes: a baffle 5 detachably fixed to the mounting plate 2 through a bolt B231. The baffle 5 presses the nozzle assembly 50 to make the shaft end face flush with the surface of the mounting plate 2, and protects the shaft end face of the nozzle assembly 50 when not sandblasting.

[0045] The opening elastic sleeve 6 installed in the stepped hole 24 of the mounting plate 2 clamps the outer periphery of the shaft end of the nozzle assembly 50;

[0046] The bushing 111 installed in the circular hole 23 on the side of the mounting plate 2 is installed on the mounting plate 2 through the cylindrical pin 211. A compression screw 20 is screwed into the bushing 111. After the compression screw 20 is screwed in, it abuts against the opening elastic sleeve 6 to clamp the outer periphery of the shaft end of the nozzle assembly 50 in the stepped hole 24 of the mounting plate 2;

[0047] The protection plate 7 located in the middle of the baffle 5 and installable on the inner diameter of the shaft end of the nozzle assembly 50 protects the inner diameter surface of the nozzle assembly 50 from being damaged by sandblasting;

[0048] The positioning mandrel 8 located in the middle of the protection plate 7 and installable on the inner diameter of the shaft end of the nozzle assembly 50 positions the protection plate 7 through the inner hole of the nozzle assembly 50.

[0049] The fitting surface 71 on the protection plate 7 is attached to the shaft end face of the nozzle assembly, and the guiding sliding hole 72 on the protection plate 7 is for the positioning mandrel 8 to penetrate and install.

[0050] A cylindrical pin 241 is installed on the mounting plate 2 to limit the nozzle assembly 50.

[0051] The floating support mechanism includes: a screw 4 screwed and fixed on the mounting plate 2. The screw 4 is positioned and immovable on the mounting plate 2 after being screwed and fixed through the cylindrical pin 221;

[0052] A spring 18 telescopically and slidably sleeved on the smooth rod section of the screw 4;

[0053] A pressing plate 3 sleeved on the smooth rod section of the screw 4 below the spring 18. The guiding hole 31 on the pressing plate 3 is slidably sleeved on the smooth rod section of the lower screw 4, and the supporting surface 32 of the pressing plate 3 supports the lower part of the nozzle assembly 50;

[0054] A knurled nut 17 screwed and fixed with the threaded section of the screw 4.

[0055] By screwing the knurled nut 17 upward, the pressing plate 3 supports the lower part of the nozzle assembly 50. When supporting the nozzle assembly 50, the spring 18 keeps the pressing plate 3 of the floating support mechanism stable to support the lower part of the nozzle assembly 50. The position of the pressing plate 3 is always floating under the action of the spring 18 and contacts and supports the lower part of the nozzle assembly 50.

[0056] A sandblasting process for a nozzle assembly in the present application uses a sandblasting protection device for a nozzle assembly, including: steps of protecting and circumferentially clamping the nozzle assembly 50 on the mounting plate 2 by the protected component, and supporting the lower part of the nozzle assembly 50 by the floating support mechanism below the mounting plate 2 before sandblasting.

[0057] The sandblasting process of the nozzle assembly is specifically as follows: The bracket 1 is fixed on the sandblasting equipment through bolts A141, washers 15, and nuts 16. The baffle 5 is installed on the mounting plate 2 through bolts B231. The nozzle assembly 50 is inserted into the open elastic sleeve 6 and pressed against the baffle 5, so that the axial end face of the nozzle assembly 50 is flush with the mounting plate 2 for positioning. The pressing plate 3 of the floating support mechanism presses the nozzle assembly 50 tightly. The tightening screw 20 clamps the nozzle assembly 50 through the elastic sleeve 6. Then, the mounting plate 2 with the nozzle assembly 50 installed is mounted on the bracket 1, and its positioning on the bracket 1 is realized through the positioning pin A9 and the diamond pin 121. The positioning mandrel 8 is installed in the inner diameter of the shaft end of the nozzle assembly 50. The protection plate 7 is positioned through the positioning mandrel 8 and attached to the nozzle assembly 50 to protect the non-sandblasted surface; the baffle 5 is removed for sandblasting.

Claims

1. A sandblasting process for a nozzle assembly, characterized in that, A sandblasting protection device using a nozzle assembly The sandblasting protection device includes: A bracket (1) and a mounting plate (2), and the mounting plate (2) is mounted on the bracket (1); A protection assembly for protecting the outer circumference and inner diameter of the axial end face of the nozzle assembly (50) is mounted on the mounting plate (2), and the protection assembly circumferentially presses the nozzle assembly (50) on the mounting plate (2); A floating support mechanism for supporting the lower part of the nozzle assembly (50) is mounted under the mounting plate (2); A stepped hole (24) for mounting an open elastic sleeve (6) and the nozzle assembly (50) is provided on the mounting plate (2), and a circular hole (23) for the pressing screw (20) to screw into is provided on the side of the mounting plate (2) with a mounting bushing (111); The protection assembly includes: A baffle (5) detachably fixed to the mounting plate (2); An open elastic sleeve (6) mounted in the stepped hole (24) of the mounting plate (2); A bushing (111) mounted in the circular hole (23), a pressing screw (20) is screwed into the bushing (111), and after the pressing screw (20) is screwed in, it abuts against the open elastic sleeve (6) to clamp the outer circumference of the axial end of the nozzle assembly (50) in the stepped hole (24) of the mounting plate (2); A protection plate (7) that can be mounted on the inner diameter of the axial end of the nozzle assembly (50) in the middle of the baffle (5); A positioning mandrel (8) that can be mounted on the inner diameter of the axial end of the nozzle assembly (50) in the middle of the protection plate (7), and the positioning mandrel (8) positions the protection plate (7); The fitting surface (71) on the protection plate (7) is attached to the axial end face of the nozzle assembly, and the guiding sliding hole (72) on the protection plate (7) allows the positioning mandrel (8) to pass through and be installed; The sandblasting process includes: The nozzle assembly (50) is mounted on the mounting plate (2) and protected by the protection assembly and circumferentially pressed, and the floating support mechanism under the mounting plate (2) supports the lower part of the nozzle assembly (50) and then the sandblasting step process.

2. The sandblasting process of the nozzle assembly according to claim 1, characterized in that: A circular hole (13) is provided on the bracket (1), and the two diagonally arranged circular holes (13) are used to correspondingly install positioning posts (9) and diamond pins (121); A supporting surface (14) with a groove is provided on the bracket (1), and the supporting surface (14) is used to horizontally place the mounting plate (2).

3. The sandblasting process of the nozzle assembly according to claim 1, characterized in that: A bolt A (141), a washer (15), and a nut (16) are mounted on the bracket (1), and the device is fixed to the sandblasting equipment through the bolt A (141), washer (15), and nut (16) of the bracket (1).

4. The sandblasting process of the nozzle assembly according to claim 1, characterized in that: A handle (25) is mounted on the outer peripheral surface of the mounting plate (2); A positioning pin hole (21) is provided on the mounting plate (2), a pressing hook hole (22) on the mounting plate (2) cooperates with a pressing hook (10), a sandblasting test piece (51) is mounted and pressed on the mounting plate (2) through the pressing hook (10) and a nut (19), and a positioning pin B (131) is installed in the positioning pin hole (21) to position the sandblasting test piece (51).

5. The sandblasting process of the nozzle assembly according to claim 1, characterized in that: A cylindrical pin (241) is mounted on the mounting plate (2) to limit the nozzle assembly (50).

6. The sandblasting process of the nozzle assembly according to claim 1, characterized in that, The floating support mechanism includes: A screw rod (4) screwed and fixed to the mounting plate (2); A spring (18) that is telescopically slidable on the smooth rod section of the screw rod (4); A pressure plate (3) sleeved on the smooth rod section of the lower part of the screw rod (4) of the spring (18). The guiding hole (31) on the pressure plate (3) is slidably sleeved on the smooth rod section of the lower part of the screw rod (4), and the supporting surface (32) of the pressure plate (3) supports the lower part of the nozzle assembly (50); A knurled nut (17) screwed and fixed to the threaded section of the screw rod (4).

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