Heat-proof batch flow coating method and flow coating device in impulse engine

Abstract

The invention relates to a heat-proof batch flow coating method and a flow coating device in a small impulse engine, which are characterized by comprising the following steps of: 1, downwards clamping necks of small opening ends (71) of generator shells (7) of a plurality of engines into a plurality of rows of small round holes (401) formed in a generator layer (4), clamping each generator shell (7) into one small round hole (401), and clamping the small opening ends (71) of the generator shells (7) into a plurality of rows of small round holes (401); the small opening end (71) of each generator shell (7) is vertically and downwards erected; 2, a plurality of middle round holes (901) in a generator clamp layer (9) tightly sleeve a large opening end (72) on each generator shell (7), so that the generator shells (7) are fixed; according to the invention, a traditional flow coating method is broken through, and a new method of injecting a coating into a generator shell to realize automatic flow coating is adopted. The method is simple, flow coating is uniform, mass production can be carried out at the same time, and manpower and time are saved. And the quality of a flow coating product is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of solid engine production and relates to a heat-proof batch flow coating device in an impulse engine. Technical Background

[0002] With the development of terminal control technology, small impulse engines are increasingly used in trajectory correction of rockets and missiles. Compared with traditional large solid engines, small impulse engines have the characteristics of more generators, smaller size, and more variable cross-sections. The generator is a conical through-type with threads at both ends. Due to the above characteristics, the construction of the heat protection layer inside the generator is not suitable for traditional spraying, brushing, rolling and other methods. The flow coating method can solve this problem well.

[0003] The present invention is proposed in order to realize batch flow coating for heat protection in small engines. Summary of the invention

[0004] In order to solve the problem of internal heat protection flow coating of a small impulse engine, the present invention proposes a batch flow coating device for internal heat protection of a small impulse engine.

[0005] A batch flow coating method for heat protection inside a small impulse engine, characterized in that it comprises the following steps:

[0006] Step 1: Insert the small openings 71 of the generator housings 7 of the multiple engines downward into the multiple rows of small circular holes 401 provided on the generator layer 4, and each generator housing 7 is inserted into a small circular hole 401, so that the small openings 71 of each generator housing 7 stand vertically downward;

[0007] Step 2: The multiple mid-round holes 901 on the generator fixture layer 9 are tightly fitted onto the large opening 72 on each generator housing 7 to fix the generator housing 7;

[0008] Step 3: Seal the small end 71 of each generator housing 7 with the generator lower plane connection switch 6;

[0009] Step 4: Fill each generator housing 7 with paint from the injection hole 161 provided on the fixed volume paint injection layer 16 above the generator fixture layer 9, and keep it for a set time;

[0010] Step 5. After the paint remains in the generator housing 7 for a set time, the generator lower plane connection switch 6 sealed at the small end 71 of the generator housing 7 is opened, the generator discharge cross rod 5 is pulled, and the generator discharge switch baffle 23 is opened to allow the paint in the generator housing 7 to flow out automatically; that is, the generator housing 7 with a uniform flow coating on the inner wall is obtained.

[0011] A small impulse engine internal heat protection batch flow coating device involving flow coating using a small impulse engine internal heat protection batch flow coating method as described in claim 1 comprises a device frame body 1, wherein the device frame body 1 comprises a base 101 and four support rods 102, characterized in that a bottom receiving trough 3 is provided on the base 101, and a generator layer 4, a generator fixture layer 9 and a fixed volume coating injection layer 16 are provided on the four support rods 102 from bottom to top in sequence; wherein the generator layer 4 is provided with a plurality of rows of small circular holes 401, the generator fixture layer 9 is provided with a plurality of rows of medium circular holes 901, and the fixed volume coating injection layer 16 is provided with a plurality of rows of injection holes 161; in the vertical direction, the center lines of the small circular holes 401, the medium circular holes 901 and the injection holes 161 are the same vertical line;

[0012] During operation, the necks of the small ends 71 ​​of the multiple generator shells 7 are inserted downward into the multiple rows of small circular holes 401 on the generator layer 4, and the generator fixture layer 9 is placed on the multiple generator shells 7. The multiple medium circular holes 901 on the generator fixture layer 9 tightly cover the large ends 72 on each generator shell 7 to fix the generator shell 7; the small ends 71 ​​of each generator shell 7 are sealed with the generator lower plane connection switch 6; the paint is injected into the fixed volume paint injection layer 16, and the paint flows into each generator shell 7 from the multiple injection holes 161, and fills each generator shell 7 with the paint; after maintaining the set time, the generator lower plane connection switch 6 is opened, and the paint flows out from each generator shell 7 and falls into the bottom receiving trough 3; that is, the generator shell 7 with a uniform flow coating on the inner wall is obtained.

[0013] Two horizontal slide rails 2 are provided on the support rods 102 on both sides of the bottom material receiving trough 3 , so that the bottom material receiving trough 3 can slide on the slide rails 2 .

[0014] There is also a generator clamp layer rubber pad 8 on the lower surface of the generator clamp layer 9; the generator clamp layer rubber pad 8 is provided with rows of matching rubber circular holes 801, the middle circular holes 901 on the generator clamp layer 9 and the rubber circular holes 801 have the same diameter and the same horizontal position, and the generator clamp layer rubber pad 8 and the generator clamp layer 9 are fixedly connected together.

[0015] The lower surface of the generator lower plane connection switch 6 is connected to the generator discharge transverse tie rod 5, and the generator discharge switch baffle 23 is closed and opened by the generator discharge transverse tie rod 5.

[0016] The fixed volume coating injection layer 16 moves up and down through the two rising platform brackets 11; the lower end of the rising platform bracket 11 is connected to the lower connecting bar 10 of the rising platform bracket by screws, and the lower connecting bar 10 of the rising platform bracket is connected to the fixed volume coating injection layer 16; the upper end of the rising platform bracket 11 is connected to the upper connecting bar 12 of the rising platform bracket with the slide rail 14 by a stud 13, and the stud 13 is threadedly connected to the rising platform shaft 15, and the two rising platform shafts 15 are connected to the two gear boxes 20 through bevel gears 19, and a bevel gear shaft 18 is connected between the two gear boxes 20; the bevel gear shaft 18 drives the two rising platform shafts 15 to rotate, drives the rising platform bracket 11 to stretch up and down, thereby driving the fixed volume coating injection layer 16 to move up and down;

[0017] When paint injection is required, the fixed-volume paint injection layer 16 is moved downward to make the fixed-volume paint injection layer 16 closer to the generator housing 7 .

[0018] An uppermost material receiving trough 17 is also provided on the outer side of the four support rods 102 . The uppermost material receiving trough 17 is used to collect excess paint scraped from the fixed volume paint injection layer 16 .

[0019] A plurality of injection layer discharge switch baffles 22 are provided on the lower surface of the fixed volume paint injection layer 16, and each row of injection layer discharge switch baffles 22 is connected to an injection layer discharge cross tie rod 21; before injection, the injection layer discharge switch baffle 22 blocks the injection hole 161 of the fixed volume paint injection layer 16, and when the fixed volume paint injection layer 16 is filled with paint and the generator housing 7 is to be flow coated, the injection layer discharge cross tie rod 21 is pulled to open the injection layer discharge switch baffle 22, so that the paint in the fixed volume paint injection layer 16 flows out at the same time.

[0020] The injection hole 161 has a large opening on the upper side and a small opening on the lower side.

[0021] This flow coating device is mainly used for the flow coating of the heat protection layer on the inner wall of the small engine casing, and has the following beneficial effects:

[0022] (1) The present invention breaks the traditional flow coating method and uses a new method to inject coating into the generator housing to make it flow coating automatically. The method of the present invention is simple, the flow coating is uniform, and large quantities can be produced simultaneously, saving manpower and time. And the quality of the flow coated products is greatly improved.

[0023] (2) The fixed volume coating injection layer can be raised and lowered by connecting the lower connecting bar of the lifting platform bracket and the sliding rail at the top of the upper connecting bar of the lifting platform bracket to the lifting platform bracket. The bubbles generated by the drop can be eliminated by controlling the height. This is flexible and practical, ensuring that there are no bubbles generated by the drop in the coating, thereby improving practicality.

[0024] (3) By installing a bottom material receiving trough on the slide rail, the paint after the coating flow can be collected for convenient reuse. While ensuring the flow coating effect, it is also convenient to save resources and reduce the use cost of the device body.

[0025] (4) By installing the topmost receiving trough at the rear end of the fixed volume paint injection layer, the excess paint can be scraped into the interior to ensure that the paint volume is fixed while recovering the excess paint, which is convenient for subsequent processing and avoids secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 , is a schematic diagram of the device structure of the present invention;

[0027] Figure 2 , is a schematic diagram of the bottom structure of the device of the present invention;

[0028] Figure 3 , is a schematic diagram of the structure of the generator housing 7 of the device of the present invention;

[0029] Among them: 1-device frame body, 2-slide rail, 3-bottom receiving trough, 4-generator layer, 5-generator discharge horizontal pull rod, 6-generator lower plane connection switch, 7-generator shell, 8-generator clamp layer rubber pad, 9-generator clamp layer, 10-rising platform bracket lower connecting strip, 11-rising platform bracket, 12-rising platform bracket upper connecting strip, 13-stud, 14-slide rail, 15-rising platform shaft, 16 -Fixed volume paint injection layer, 17-uppermost material receiving trough, 18-bevel gear shaft, 19-bevel gear, 20-gear box, 21-injection layer discharge horizontal tie rod, 22-injection layer discharge switch baffle, 23-generator discharge switch baffle, 71-small mouth end, 72-large mouth end, 101-base, 102-support rod, 161-injection hole, 401-small round hole, 801-rubber pad middle round hole, 901-middle round hole. DETAILED DESCRIPTION

[0030] A batch flow coating method for heat protection inside a small impulse engine, characterized in that it comprises the following steps:

[0031] Step 1: Insert the small openings 71 of the generator housings 7 of the multiple engines downward into the multiple rows of small circular holes 401 provided on the generator layer 4, and each generator housing 7 is inserted into a small circular hole 401, so that the small openings 71 of each generator housing 7 stand vertically downward;

[0032] Step 2: The multiple mid-round holes 901 on the generator fixture layer 9 are tightly fitted onto the large opening 72 on each generator housing 7 to fix the generator housing 7;

[0033] Step 3: Seal the small end 71 of each generator housing 7 with the generator lower plane connection switch 6;

[0034] Step 4: Fill each generator housing 7 with paint from the injection hole 161 above the fixed volume paint injection layer and keep it for a set time;

[0035] Step 5. After the paint remains in the generator housing 7 for a set time, the generator lower plane connection switch 6 sealed at the small end of the generator housing 7 is turned on, the generator discharge cross rod 5 is pulled, and the generator discharge switch baffle 23 is opened to allow the paint in the generator housing 7 to flow out automatically; that is, the generator housing 7 with a uniform flow coating on the inner wall is obtained.

[0036] A small impulse engine internal heat protection batch flow coating device involving flow coating using a small impulse engine internal heat protection batch flow coating method described in claim 1 comprises a device frame body 1, wherein the device frame body 1 comprises a base 101 and four support rods 102, characterized in that a bottom receiving trough 3 is provided on the base 101, and a generator layer 4, a generator fixture layer 9, a generator fixture layer rubber pad 8 and a fixed volume coating injection layer 16 are provided on the four support rods 102 from bottom to top; wherein a plurality of rows of small circular holes 401 are provided on the generator layer 4, a plurality of rows of middle circular holes 901 are provided on the generator fixture layer 9, a plurality of rows of middle circular holes 801 identical to 9 are provided on the generator fixture layer rubber pad 8, and a plurality of rows of injection holes 161 are provided on the fixed volume coating injection layer 16; in the vertical direction, the center lines of the small circular holes 401, the middle circular holes 901 and the injection holes 161 are the same vertical line;

[0037] During operation, the necks of the small ends 71 ​​of the multiple generator shells 7 are inserted downward into the multiple rows of small circular holes 401 on the generator layer 4, and the generator fixture layer 9 is placed on the multiple generator shells 7, and the multiple middle circular holes 901 on the generator fixture layer 9 and the multiple middle circular holes 801 on the generator fixture layer rubber pad 8 are used to tightly cover the large end 72 on each generator shell 7, so that the generator shell 7 is fixed; the small end 71 of each generator shell 7 is sealed with the generator lower plane connection switch 6; the paint is injected into the fixed volume paint injection layer 16, and the paint flows into each generator shell 7 from the multiple injection holes 161, and the paint fills each generator shell 7; after keeping the set time, the generator lower plane connection switch 6 is opened, the generator discharge cross rod 5 is pulled, the generator discharge switch baffle 23 is opened, and the paint flows out from each generator shell 7 and falls on the bottom receiving trough 3; that is, the generator shell 7 with a uniform flow coating on the inner wall is obtained.

[0038] Two horizontal slide rails 2 are provided on the support rods 102 on both sides of the bottom material receiving trough 3 , so that the bottom material receiving trough 3 can slide on the slide rails 2 .

[0039] There is also a generator clamp layer rubber pad 8 on the lower surface of the generator clamp layer 9; the generator clamp layer rubber pad 8 is provided with rows of matching rubber circular holes 801, the middle circular holes 901 on the generator clamp layer 9 and the rubber circular holes 801 have the same diameter and the same horizontal position, and the generator clamp layer rubber pad 8 and the generator clamp layer 9 are fixedly connected together.

[0040] The lower surface of the generator lower plane connection switch 6 is connected to the generator discharge transverse tie rod 5, and the generator discharge switch baffle 23 is closed and opened by the generator discharge transverse tie rod 5.

[0041] The fixed volume coating injection layer 16 moves up and down through the two rising platform brackets 11; the lower end of the rising platform bracket 11 is connected to the lower connecting bar 10 of the rising platform bracket by screws, and the lower connecting bar 10 of the rising platform bracket is connected to the fixed volume coating injection layer 16; the upper end of the rising platform bracket 11 is connected to the upper connecting bar 12 of the rising platform bracket with the slide rail 14 by a stud 13, and the stud 13 is threadedly connected to the rising platform shaft 15, and the two rising platform shafts 15 are connected to the two gear boxes 20 through bevel gears 19, and a bevel gear shaft 18 is connected between the two gear boxes 20; the bevel gear shaft 18 drives the two rising platform shafts 15 to rotate, drives the rising platform bracket 11 to stretch up and down, thereby driving the fixed volume coating injection layer 16 to move up and down;

[0042] When paint injection is required, the fixed-volume paint injection layer 16 is moved downward to make the fixed-volume paint injection layer 16 closer to the generator housing 7 .

[0043] An uppermost material receiving trough 17 is also provided on the outer side of the four support rods 102 . The uppermost material receiving trough 17 is used to collect excess paint scraped from the fixed volume paint injection layer 16 .

[0044] A plurality of injection layer discharge switch baffles 22 are provided on the lower surface of the fixed volume paint injection layer 16, and each row of injection layer discharge switch baffles 22 is connected to an injection layer discharge cross tie rod 21; before injection, the injection layer discharge switch baffle 22 blocks the injection hole 161 of the fixed volume paint injection layer 16, and when the fixed volume paint injection layer 16 is filled with paint and the generator housing 7 is to be flow coated, the injection layer discharge cross tie rod 21 is pulled to open the injection layer discharge switch baffle 22, so that the paint in the fixed volume paint injection layer 16 flows out at the same time.

[0045] The injection hole 161 has a large opening on the upper side and a small opening on the lower side.

[0046] A small impulse engine internal heat protection batch flow coating method for flow coating involves a small impulse engine internal heat protection batch flow coating device, including a device frame body 1, wherein the device frame body 1 includes a base 101 and four support rods 102, characterized in that a generator layer 4 is provided on the bottom receiving trough 3, and a plurality of rows of small circular holes 401 are provided on the generator layer 4 for placing a generator shell 7, and the small end neck of the generator shell 7 is stuck in the small circular hole 401 of the generator layer 4; the four corners of the generator layer 4 are fixedly mounted on the four support rods 102 , the generator layer 4 is at a set distance from the top surface of the bottom receiving trough 3, and there is a generator fixture layer 9 on the generator layer 4, the generator fixture layer 9 is installed on the device frame body 1 by bolts, and there is a generator fixture layer rubber pad 8 on the lower surface of the generator fixture layer 9; the generator fixture layer rubber pad 8 is provided with rows of matching rubber circular holes 801, and the generator fixture layer 9 also has rows of middle circular holes 901, the rubber circular holes 801 and the middle circular holes 901 have the same diameter and the same horizontal position, and the generator fixture layer rubber pad 8 and the generator fixture layer 9 are fixedly connected together;

[0047] A gear box 20 is connected to the upper part of each of the two support rods 102, a bevel gear shaft 18 is connected between the two gear boxes 20, and two upper connecting bars 12 of the lifting platform bracket are connected to the two support rods 102, the upper connecting bar 12 of the lifting platform bracket is horizontal with the base 101, the upper connecting bar 12 of the lifting platform bracket is vertical with the bevel gear shaft 18, and the upper connecting bar 12 of the platform bracket and the bevel gear shaft 18 are in the same horizontal plane, and a lifting platform shaft 15 is connected to each of the outer sides of the upper connecting bar 12 of the lifting platform bracket through two studs 13, and the upper connecting bar 12 of the lifting platform bracket is provided with a slide rail 14, a stud 13 is slidably connected to the upper connecting bar 12 of the lifting platform bracket, and a stud 13 is threadedly connected to the upper connecting bar 12 of the bracket; a lifting platform bracket 11 is connected to each of the two studs 13, and the lower end of the lifting platform bracket 11 is connected to the lower connecting bar 10 of the lifting platform bracket through two screws, and the lower connecting bar 10 of the lifting platform bracket is fixedly connected to the fixed volume coating injection layer 16;

[0048] The two lifting platform shafts 15 are connected to two gear boxes 20 through bevel gears 19, and a bevel gear shaft 18 is connected between the two gear boxes 20; the bevel gear shaft 18 drives the two lifting platform shafts 15 to rotate, drives the lifting platform bracket 11 to stretch up and down, and thus drives the fixed volume paint injection layer 16 to move up and down;

[0049] The fixed volume coating injection layer 16 is provided with injection holes 161, each injection hole 161 is aligned with the center of a central circular hole 901 on a generator fixture layer 9;

[0050] An injection layer discharge switch baffle 22 is provided at the lower end of each injection hole 161 of the fixed volume paint injection layer 16. When the fixed volume paint injection layer 16 needs to be injected, the injection layer discharge cross tie rod 21 is pulled to open the injection layer discharge switch baffle 22. When the fixed volume paint injection layer 16 is not needed to discharge, the injection layer discharge cross tie rod 21 is pulled to close the injection layer discharge switch baffle 22.

[0051] A generator discharge switch baffle 23 is also provided at the lower end of the small opening of each generator housing 7. The generator discharge transverse tie rod 5 is pulled to close the generator discharge switch baffle 23, so that the paint in the generator housing 7 cannot flow out. When the paint in the generator housing 7 needs to flow out, the generator discharge transverse tie rod 5 is pulled to open the generator discharge switch baffle 23.

[0052] Next to the fixed volume coating injection layer 16, there is also an uppermost material receiving trough 17;

[0053] During operation, firstly, the small end of the generator housing 7 is inserted into the small circular hole 401 of the generator layer 4, and the generator clamp layer rubber pad 8 and the generator clamp layer 9 are installed on the device frame body 1 by bolts, so that the upper end of each generator housing 7 is clamped in the rubber circular hole 801 on the generator clamp layer rubber pad 8 to eliminate radial rotation and axial movement of the generator housing 7;

[0054] By rotating the bevel gear shaft 18, the fixed volume paint injection layer 16 is lowered to a set height through the action of the lower connecting bar 10 of the rising platform bracket, the rising platform bracket 11, the upper connecting bar 12 of the rising platform bracket, the stud 13, the slide rail 14 and the rising platform shaft 15, and the paint is injected into the fixed volume paint injection layer 16, and the excess paint is scraped off into the uppermost material receiving trough 17. At this time, the paint can flow into the injection layer opening 161 under the action of gravity, and the injection layer discharge cross rod 21 is pulled to fill the inside of the generator housing 7 with paint. After maintaining for a period of time, the generator housing 7 generator lower plane connection switch 6 is opened, and the generator discharge cross rod 5 is pulled to make the paint flow out to the bottom receiving trough 3 for reuse.

[0055] This device is not only simple to operate and easy to use, but also flexible and practical, safe and reliable, clean and sanitary, high in working efficiency, small in space occupation and long in service life.

[0056] The technical solution of the present invention:

[0057] The present invention proposes a heat-proof batch flow coating device in a small impulse engine, comprising a device frame body, a slide rail, a bottom material receiving trough, a generator layer, a generator discharge horizontal tie rod, a generator lower plane connecting switch, a generator shell, a generator clamp layer rubber pad, a generator clamp layer, a lower connecting strip of a rising platform bracket, a rising platform bracket, an upper connecting strip of the rising platform bracket, a stud, a slide rail, a rising platform shaft, a fixed volume coating injection layer, an uppermost material receiving trough, a bevel gear shaft, a bevel gear, a gear box, an injection layer discharge horizontal tie rod, an injection layer discharge switch baffle, and a generator discharge switch baffle.

[0058] The device presents a bilaterally symmetrical structure, with a bevel gear, a gear box, a lower connecting strip of a lifting platform bracket, a lifting platform bracket, an upper connecting strip of the lifting platform bracket, a stud, a slide rail and a lifting platform shaft each having one on the left and one on the right.

[0059] The slide rail is provided at the bottom of the device body, and the bottom material receiving trough is installed at the top of the slide rail.

[0060] The generator layer is arranged on the upper part of the bottom receiving trough, the generator lower plane connecting switch is installed on the lower end of the generator, the generator lower plane connecting switch is installed with the generator discharge switch baffle, and the generator discharge switch horizontal pull rod is connected to the generator discharge switch baffle.

[0061] The generator clamp layer rubber pad is installed on the upper end of the generator layer, and the generator clamp layer is installed on the generator clamp layer rubber pad.

[0062] The lower connecting bar of the rising platform bracket is arranged at one end of the fixed volume coating injection layer, and the upper connecting bar of the rising platform bracket is installed at the upper end. The top ends of the lower connecting bar of the rising platform bracket and the upper connecting bar of the rising platform bracket are both provided with slide rails.

[0063] The lifting platform bracket is installed between the lower connecting bar of the lifting platform bracket and the upper connecting bar of the lifting platform bracket, and the lifting platform bracket is fixedly connected with the lifting platform shaft.

[0064] The stud is installed on the lifting platform shaft, and the lifting platform bracket can be moved up and down through the movement of the stud.

[0065] The injection layer discharge switch horizontal tie rod is installed at the bottom of the fixed volume paint injection layer, and the injection layer discharge switch horizontal tie rod is connected to the injection layer discharge switch baffle.

[0066] The opening volume of the fixed volume coating injection layer is designed to be consistent with the internal volume of the generator, and a scraper is used to scrape off the coating overflowing from the opening.

[0067] The uppermost receiving trough collects the scraped excess paint for reuse.

[0068] Furthermore, the gear box is connected to the device body by bolts.

[0069] Furthermore, the bevel gear adopts a 6201 deep groove ball bearing and has an interference fit with the gear box.

[0070] Furthermore, the bevel gear shaft is connected to the 6201 deep groove ball bearing by a key.

[0071] Furthermore, the upper platform stud and the rising platform shaft are connected via threads.

Claims

1. A batch flow coating method for heat protection in a small impulse engine, characterized in that: The following steps are involved: Step 1: Insert the neck of the small end (71) of the generator housing (7) of the multiple engines downward into a plurality of rows of small circular holes (401) provided on the generator layer (4), and each generator housing (7) is inserted into a small circular hole (401), so that the small end (71) of each generator housing (7) stands vertically downward; Step 2: The multiple mid-round holes (901) on the generator fixture layer (9) are tightly fitted onto the large opening (72) on each generator housing (7) to fix the generator housing (7); Step 3: Seal the small end (71) of each generator housing (7) with the generator lower plane connection switch (6); Step 4: Fill each generator housing (7) with paint from the injection hole (161) provided on the fixed volume paint injection layer (16) above the generator fixture layer (9), and keep filling for a set time; Step 5: After the paint remains in the generator housing (7) for a set time, the generator lower plane connection switch (6) sealed at the small opening end (71) of the generator housing (7) is opened, the generator discharge cross rod (5) is pulled, and the generator discharge switch baffle (23) is opened to allow the paint in the generator housing (7) to flow out automatically; thus, a generator housing (7) with a uniformly coated inner wall is obtained.

2. A small impulse engine internal heat protection batch flow coating device involved in flow coating using a small impulse engine internal heat protection batch flow coating method as described in claim 1, comprising a device frame body (1), wherein the device frame body (1) includes a base (101) and four support rods (102), characterized in that: A bottom receiving trough (3) is provided on the base (101), and a generator layer (4), a generator fixture layer (9) and a fixed volume coating injection layer (16) are provided on the four support rods (102) from bottom to top in sequence; wherein the generator layer (4) is provided with a plurality of rows of small circular holes (401), the generator fixture layer (9) is provided with a plurality of rows of medium circular holes (901), and the fixed volume coating injection layer (16) is provided with a plurality of rows of injection holes (161); in the vertical direction, the center lines of the small circular holes (401), the medium circular holes (901) and the injection holes (161) are the same vertical line; During operation, the necks of the small ends (71) of the plurality of generator shells (7) are inserted downward into the plurality of small circular holes (401) arranged in a row on the generator layer (4); a generator fixture layer (9) is placed on the plurality of generator shells (7); and the plurality of medium circular holes (901) on the generator fixture layer (9) tightly cover the large ends (72) on the upper side of each generator shell (7) to fix the generator shell (7); the small ends (71) of each generator shell (7) are sealed with a generator lower plane connection switch (6); paint is injected into the fixed volume paint injection layer (16), and the paint flows into each generator shell (7) from the plurality of injection holes (161), and the paint fills each generator shell (7); after maintaining the set time, the generator lower plane connection switch (6) is opened, and the paint flows out from each generator shell (7) and falls into the bottom receiving trough (3); thus, a generator shell (7) with a uniform flow coating on the inner wall is obtained.

3. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: Two horizontal slide rails (2) are provided on the support rods (102) on both sides of the bottom material receiving trough (3), so that the bottom material receiving trough (3) can slide on the slide rails (2).

4. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: There is also a generator clamp layer rubber pad (8) on the lower surface of the generator clamp layer (9); the generator clamp layer rubber pad (8) is provided with rows of matching rubber circular holes (801), the middle circular holes (901) on the generator clamp layer (9) and the rubber circular holes (801) have the same diameter and the same horizontal position, and the generator clamp layer rubber pad (8) and the generator clamp layer (9) are fixedly connected together.

5. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: The lower surface of the generator lower plane connection switch (6) is connected to a generator discharge transverse tie rod (5), and the generator discharge switch baffle (23) is closed and opened by the generator discharge transverse tie rod (5).

6. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: The fixed volume coating injection layer (16) is moved up and down through two lifting platform brackets (11); the lower end of the lifting platform bracket (11) is connected to the lower connecting strip (10) of the lifting platform bracket through screws, and the lower connecting strip (10) of the lifting platform bracket is connected to the fixed volume coating injection layer (16); the upper end of the lifting platform bracket (11) is connected to the upper connecting strip (12) of the lifting platform bracket with a slide rail (14) through a stud (13), and the stud (13) is threadedly connected to the lifting platform shaft (15), and the two lifting platform shafts (15) are connected to two gear boxes (20) through bevel gears (19), and a bevel gear shaft (18) is connected between the two gear boxes (20); the bevel gear shaft (18) drives the two lifting platform shafts (15) to rotate, drives the lifting platform bracket (11) to stretch up and down, and thus drives the fixed volume coating injection layer (16) to move up and down; When paint injection is required, the fixed volume paint injection layer (16) is moved downward to make the fixed volume paint injection layer (16) closer to the generator housing (7).

7. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: An uppermost material receiving trough (17) is also provided on the outer side of the four support rods (102), and the uppermost material receiving trough (17) is used to collect excess paint scraped off from the fixed volume paint injection layer (16).

8. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: A plurality of injection layer discharge switch baffles (22) are provided on the lower surface of the fixed volume paint injection layer (16), and each row of injection layer discharge switch baffles (22) is connected to an injection layer discharge transverse tie rod (21); before injection, the injection layer discharge switch baffles (22) block the injection hole (161) of the fixed volume paint injection layer (16); when the fixed volume paint injection layer (16) is filled with paint and the generator housing (7) is to be flow coated, the injection layer discharge transverse tie rod (21) is pulled to open the injection layer discharge switch baffles (22), so that the paint in the fixed volume paint injection layer (16) flows out simultaneously.

9. A batch flow coating device for heat protection inside a small impulse engine according to claim 2, characterized in that: The injection hole (161) has a large opening on the top and a small opening on the bottom.

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