Speed regulation mechanism, stirring device, paint supply module and speed regulation method

Abstract

The invention discloses a speed regulation mechanism, a stirring device, a paint supply module and a speed regulation method.The speed regulation mechanism used for a pneumatic motor comprises an air inlet cavity communicating with an external air source and further comprises a diaphragm, the diaphragm forms at least part of the area of the wall of the air inlet cavity, at least one air inlet is formed in the diaphragm, and the air inlet is communicated with the stirring device; the diaphragm can move in the direction close to or away from the air inlet cavity body under the action of air pressure, the diaphragm deforms according to the exhaust pressure of the pneumatic motor, and the air inlet is communicated with a working air containing cavity in the pneumatic motor. By means of the paint supply module, the stirring speed in the main agent stirring tank can be kept within a relatively stable range all the time, and the requirement for the anti-explosion working environment of water-based paint can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of painting devices, and particularly relates to a speed regulating mechanism, a stirring device, a paint supply module, and a speed regulating method. Background Art

[0002] In recent years, with the increasing requirements for the environmental protection of products, water-based paints have gradually occupied an increasingly large market share. However, when spraying water-based paints, higher spraying requirements are needed: on the one hand, in order to overcome problems such as easy wall sticking or precipitation of water-based paints, it is necessary to continuously stir them during the spraying process; on the other hand, the stirring speed cannot be too fast, otherwise it is easy to cause demulsification of water-based paints.

[0003] In addition, the explosion-proof performance requirements during spraying in a paint spraying room are also relatively high. Therefore, it is necessary to minimize the use of electrical or charged facilities to the greatest extent. Therefore, in the industry, a pneumatic motor is usually used to stir water-based paints. However, as the materials in the stirring tank continuously change, it is difficult to keep the stirring speed of the pneumatic motor relatively stable. Therefore, how to achieve a relatively stable stirring speed during the spraying process of water-based paints is still a challenge in the spraying industry. Summary of the Invention

[0004] In order to solve the above technical problems, one of the purposes of the present invention is to provide a speed regulating mechanism for a pneumatic motor, which includes an air intake cavity, and the air intake cavity is communicated with an external air source. It further includes a diaphragm, the diaphragm forms at least a partial area of the wall of the air intake cavity, at least one air intake opening is provided on the diaphragm, the diaphragm can move in a direction close to or away from the air intake cavity body under the action of air pressure, the diaphragm deforms according to the magnitude of the exhaust pressure of the pneumatic motor, and the air intake opening is communicated with the working gas accommodation cavity inside the pneumatic motor.

[0005] Therefore, by adding an additional air intake cavity to a traditional pneumatic motor and adjusting the air intake volume of the air intake cavity through the movement of the diaphragm, when the pneumatic motor rotates at a relatively high speed, the air pressure feedback in the output air path of the pneumatic motor is relatively large. At this time, the diaphragm is subjected to a relatively large pressure and deforms towards the side close to the air intake cavity, thereby reducing the volume of the air intake cavity. As a result, the air flow rate entering the air intake cavity is relatively small, and thus the air flow entering the pneumatic motor through the air intake opening of the diaphragm will also become smaller. Therefore, the supplementary air flow to the pneumatic motor is correspondingly reduced. Thus, the rotation speed of the pneumatic motor can be appropriately reduced, so that the rotation speed of the pneumatic motor remains in a dynamically relatively stable state in the long term.

[0006] Another purpose of the present invention is to provide a stirring device, which includes the aforementioned speed regulating mechanism for a pneumatic motor.

[0007] A third object of the present invention is to provide a paint supply module, which includes the speed regulating mechanism or the stirring device for the pneumatic motor described above. Therefore, by using the paint supply module of the present invention, the main agent is stirred by using a pneumatic motor to meet the explosion-proof performance requirements in the actual painting process; by using the speed regulating mechanism of the pneumatic motor of the present invention, only by simply adding an air intake cavity and a diaphragm structure, it is possible to realize that the output pressure fed back to the pneumatic motor is different according to the amount of materials in the stirring tank, and then immediately adjust the speed of the pneumatic motor. Therefore, it can be ensured that during paint supply, the stirring speed in the main agent stirring tank always remains within a relatively stable range.

[0008] Furthermore, it further includes a main agent supply part and a curing agent supply part. The main agent supply part includes a main agent stirring tank, and the curing agent supply part includes a curing agent storage tank. The main agent stirring tank drives the stirring paddle by using a pneumatic motor, and further includes the speed regulating mechanism for the pneumatic motor described above.

[0009] Even further, it further includes a control area for mixing the main agent and the curing agent. The main agent is connected to the control area through a pipeline, and the main agent can circulate between the main agent stirring tank and the control area. In this application, a large circulation system is formed between the circulation pipeline and the main agent stirring tank. By deliberately extending the circulation path of the main agent to the control area, it is to prevent the main agent staying in the pipeline from precipitating or deteriorating and becoming ineffective due to not being used in time.

[0010] Even further, a main agent feed valve is provided in the control area, and a main agent return pipeline respectively communicating with the main agent feed valve and the main agent stirring tank is further included. Therefore, the main agent can continuously flow back to the main agent stirring tank through the main agent return pipeline.

[0011] Even further, it further includes a voltage stabilizing unit. The voltage stabilizing unit includes a first voltage regulator arranged downstream of the discharge pump of the main agent stirring tank, a second voltage regulator arranged downstream of the discharge pump of the curing agent storage tank, and a third voltage regulator arranged downstream of the mixing chamber. A safety valve is arranged at one end of the main agent return pipeline close to the main agent stirring tank. Therefore, it can be ensured that the pressure of the main agent flowing back to the main agent stirring tank is stable, and the material pressure in the main agent stirring tank will not fluctuate too much. Thus, it can ensure the stable conveying pressure of the main agent and the curing agent pumped into the control area; it can also ensure the stable pressure of the paint liquid to be sprayed.

[0012] Even further, it further includes a filtering unit. The filtering unit includes a first filter, a second filter, and a third filter for filtering the main agent, the curing agent, and the solvent. The first filter is arranged upstream of the first voltage regulator; the second filter is arranged upstream of the second voltage regulator.

[0013] Furthermore, a cleaning solvent storage tank is also provided. The cleaning solvent storage tank can be respectively communicated with the curing agent storage tank and the solvent storage tank, and a communication pipeline connecting the feeding pipeline of the main agent and the feeding pipeline of the curing agent is also included. The communication pipeline is respectively connected to the main agent feeding valve and the curing agent feeding valve. Therefore, only by connecting the feeding pipeline of the cleaning solvent to any one of the feeding pipelines of the main agent and the curing agent, the main agent mixing tank, the curing agent storage tank, and the feeding pipeline and discharging pipeline connecting them to the control area can be fully cleaned before material switching.

[0014] A fourth object of the present invention is to provide a speed regulation method for a pneumatic motor, which includes the following steps: STEP 01: Configure the intake cavity: Configure an intake cavity with an adjustable volume, and set the maximum volume of the intake cavity as V max , and connect the intake cavity to the working gas accommodation cavity inside the pneumatic motor; STEP 02: Measure the exhaust pressure P of the pneumatic motor and set a relationship that is inversely related to the volume of the intake cavity; STEP 03: Set the exhaust pressure of the pneumatic motor at the target stirring speed and compare it with the actual exhaust pressure to adjust the volume of the intake cavity: When the target stirring speed of the pneumatic motor is R0 and the stirring speed of the pneumatic motor is R0, the volume of the intake cavity reaches V max , and the exhaust pressure at this time is P0, When the stirring speed of the pneumatic motor is greater than R0, the actual exhaust pressure P > P0, then reduce the volume of the intake cavity; When the stirring speed of the pneumatic motor is less than R0, the actual exhaust pressure P < P0, then increase the volume of the intake cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the intake cavity of the first embodiment of the present invention without the upper cover; Figure 2 is a cross-sectional view of the intake cavity of the first embodiment of the present invention when the diaphragm is in a normal state; Figure 3 is a cross-sectional view of the intake cavity of the first embodiment of the present invention when the diaphragm is in a compressed and deformed state; Figure 4 is a three-dimensional structural diagram of the paint supply module of the third embodiment of the present invention; Figure 5 is a three-dimensional structural diagram of the main agent mixing tank of the third embodiment of the present invention; Figure 6Schematic diagram of a partial structure of the paint supply module according to Embodiment 3 of the present invention; Figure 7 Schematic three-dimensional structure diagram of the control area according to Embodiment 3 of the present invention.

[0016] In the figure: 1. Intake cavity; 2. Diaphragm; 21. Intake inlet; 3. Main agent stirring tank; 4. Curing agent storage tank; 5. Cleaning solvent storage tank; 6. Control area; 71. Main agent return pipeline; 72. Main agent feed valve; 73. Curing agent feed valve; 74. Mixing chamber; 81. First pressure regulator; 82. Second pressure regulator; 83. Third pressure regulator; 84. Safety valve; 91. Main agent metering pump; 92. Curing agent metering pump; 10. Spray gun; 111. First filter; 112. Second filter; 113. Third filter; 12. Pneumatic motor. Specific embodiments

[0017] The following describes in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0018] Embodiment 1: Refer to the attached Figure 1 As shown, this embodiment is a speed regulation mechanism for a pneumatic motor 12, which includes an intake cavity 1. The intake cavity 1 is connected to an external air source. It also includes a diaphragm 2. The diaphragm 2 forms at least a wall portion of the intake cavity 1. At least one intake inlet 21 is provided on the diaphragm 2. The diaphragm 2 can move in a direction close to or away from the body of the intake cavity 1 under the action of air pressure. Therefore, through the deformation of the diaphragm 2, the volume of the intake cavity 1 changes. When the volume of the intake cavity 1 becomes smaller, the volume of the air entering it becomes smaller. Therefore, the volume of the gas discharged from the intake inlet 21 will become smaller.

[0019] In some embodiments, the diaphragm 2 is directly set to form a complete wall portion of the intake cavity 1, and the diaphragm 2 is located on the exhaust passage of the pneumatic motor 12 or can be deformed by the magnitude of the exhaust pressure of the pneumatic motor. The intake inlet 21 is connected to the working gas accommodation cavity inside the pneumatic motor 12. In other possible embodiments, the diaphragm 2 can also be only a partial area of one or more wall portions of the intake cavity 1.

[0020] Therefore, by adding an intake cavity 1 to the traditional pneumatic motor 12 and adjusting the intake air volume of the intake cavity 1 through the movement of the diaphragm 2, when the rotational speed of the pneumatic motor 12 is relatively high, the air pressure feedback in the output air path of the pneumatic motor 12 is relatively large. At this time, the diaphragm 2 is subjected to a relatively large pressure and deforms towards the side close to the intake cavity 1, thereby reducing the volume of the intake cavity 1. As a result, the air flow rate entering the intake cavity 1 is relatively small. Therefore, the air flow entering the pneumatic motor 12 through the intake port 21 of the diaphragm 2 also becomes smaller, and thus the supplementary air flow to the pneumatic motor 12 is correspondingly reduced. Therefore, the rotational speed of the pneumatic motor 12 can be appropriately reduced, so that the rotational speed of the pneumatic motor 12 is generally in a dynamically relatively stable state.

[0021] In some embodiments, the diaphragm 2 is located on the side of the intake cavity 1 close to the working gas accommodation cavity inside the pneumatic motor 12, and the intake port 21 of the diaphragm 2 is directly connected to the working gas accommodation cavity inside the pneumatic motor 12. Therefore, the overall structure can be made more compact, and the setting of the air path structure is also reduced. However, for this structural design, it should be noted that the output air path of the pneumatic motor 12 needs to be able to achieve the effect of applying a force to the diaphragm 2.

[0022] The compensation adjustment method of the diaphragm 2 for the rotational speed of the pneumatic motor 12 is described as follows: Taking the target stirring speed of the pneumatic motor 12 as R0, when the stirring speed of the pneumatic motor 12 is R0, the volume of the intake cavity 1 reaches V max , and at this time, the diaphragm 2 is also in a state without deformation (as shown in the figure), and the exhaust pressure at this time is P0. When the material to be stirred in the stirring tank is less, since the pressure and total amount at the intake port of the pneumatic motor 12 remain unchanged, as the material decreases, the stirring speed of the pneumatic motor 12 gradually increases. When the stirring speed of the pneumatic motor 12 is greater than R0, the air pressure at the outlet of the pneumatic motor 12 increases. Therefore, the exhaust pressure P > P0. As a result, the diaphragm 2 deforms under the action of the exhaust pressure, and the volume of the intake cavity 1 becomes smaller. Therefore, the volume of the gas that can enter the intake cavity 1 also becomes smaller. Therefore, the air pressure compensated to the pneumatic motor 12 also becomes smaller. At this time, the stirring speed of the pneumatic motor 12 can be reduced until the exhaust pressure P ≤ P0, and the diaphragm 2 returns to its original shape.

[0023] Conversely, when the material in the mixing tank is relatively full, in order to drive the full mixing of these materials, more energy is consumed. Therefore, the mixing speed of the pneumatic motor 12 will decrease to be lower than the target mixing speed R0, and the exhaust pressure P of the pneumatic motor 12 is less than P0. At this time, the volume of the intake cavity 1 reaches Vmax. Therefore, more gas enters the intake cavity 1, and then the gas entering the working gas cavity inside the pneumatic motor 12 through the intake port 21 on the diaphragm 2 gradually increases until it reaches the maximum. Thus, it is ensured that the mixing speed of the pneumatic motor 12 always remains near the target mixing speed R0. Note that R0 is not a fixed value, but a speed range. For example, if R0 is 50 - 55 rpm, as long as the actual mixing speed of the pneumatic motor 12 reaches any value within this range (not limited to being an integer), it means that the target mixing speed R0 is achieved.

[0024] The pneumatic motor 12 of the present invention can be a vane type pneumatic motor, a piston type pneumatic motor, a gear type pneumatic motor or other forms of pneumatic motors.

[0025] The speed regulating mechanism of the pneumatic motor can be integrated inside the pneumatic motor or be an independent mechanism outside the pneumatic motor 12. It only needs to ensure that the intake port 21 of the diaphragm 2 can communicate with the working gas cavity inside the pneumatic motor 12, and the output pressure value of the exhaust port of the pneumatic motor 12 can push the diaphragm 2 to deform.

[0026] Embodiment 2: This embodiment is a mixing device, which includes the speed regulating mechanism for the pneumatic motor in Embodiment 1. This mixing device can be applied to various scenarios with high requirements for explosion-proof performance but relatively stable mixing speed control, such as the chemical industry, food processing, pharmaceutical industry, etc. By adopting the mixing device of this embodiment, the mixing speed can be automatically adjusted according to the actual working conditions to ensure the stability and consistency of the mixing effect.

[0027] Embodiment 3: This embodiment is a paint supply module, which includes the speed regulating mechanism for the pneumatic motor in Embodiment 1 or the mixing device in Embodiment 2.

[0028] The paint supply module of the present invention further includes a main agent supply part and a curing agent supply part. The main agent supply part includes a main agent mixing tank 3, and the curing agent supply part includes a curing agent storage tank 4. The main agent mixing tank 3 drives the mixing paddle by using the pneumatic motor 12, and also includes the speed regulating mechanism for the pneumatic motor in Embodiment 1.

[0029] In some embodiments, the paint supply module of the present invention further includes a control area 6 for mixing the main agent and the curing agent. The main agent is connected to the control area 6 through a pipeline, and the main agent can circulate between the main agent mixing tank 3 and the control area 6. In this embodiment, a large circulation system is formed between the circulation pipeline and the main agent mixing tank 3. By deliberately extending the circulation path of the main agent to the control area 6, it is to prevent the main agent staying in the pipeline from precipitating or deteriorating and becoming ineffective due to not being used in time.

[0030] In some embodiments, since the curing agent is sensitive to humidity and oxygen, therefore, the material between the curing agent storage tank 4 and the control area 6 does not need to circulate, but it is necessary to ensure sufficient sealing of the curing agent storage tank 4, and it can be pressurized and protected by introducing nitrogen or the like into it.

[0031] In some embodiments, a main agent feed valve 72 and a curing agent feed valve 73 are provided in the control area 6, and a main agent return pipeline 71 is further included, which is respectively connected to the main agent feed valve 72 and the main agent mixing tank 3. Thus, the main agent can continuously return to the main agent mixing tank 3 through the main agent return pipeline 71. The main agent feed valve 72 and the curing agent feed valve 73 can be of a manifold structure or an ordinary valve structure.

[0032] In some embodiments, the paint supply module of the present invention further includes a voltage stabilizing unit. The voltage stabilizing unit includes a first voltage regulator 81 provided downstream of the discharge pump of the main agent mixing tank 3 and a second voltage regulator 82 provided downstream of the discharge pump of the curing agent storage tank 4. Thus, it can ensure the stable conveying pressure of the main agent and the curing agent pumped into the control area 6. In some embodiments, the voltage stabilizing unit further includes a third voltage regulator 83 provided downstream of the mixing chamber 74. After the pressure is stabilized by the third voltage regulator 83, it is sprayed out through the spray gun 10, which can ensure the stable pressure of the paint liquid to be sprayed.

[0033] In some embodiments, a safety valve 84 is provided at one end of the main agent return pipeline 71 close to the main agent mixing tank 3. Specifically, the safety valve 84 can be a back pressure valve. Thus, it can ensure the stable pressure of the main agent returning to the main agent mixing tank 3 and will not cause excessive pressure fluctuations of the material in the main agent mixing tank 3.

[0034] In some embodiments, the main agent mixing tank 3, the curing agent storage tank 4 and the solvent storage tank are respectively connected to the external gas source system. Therefore, it can ensure the smooth supply and pumping out of the main agent, the curing agent and the solvent.

[0035] In some embodiments, it further includes a main agent metering pump 91 for metering the main agent and a curing agent metering pump 92 for metering the curing agent. The main agent and the curing agent enter the mixing chamber for mixing after passing through the main agent metering pump 91 and the curing agent metering pump 92 respectively.

[0036] In some embodiments, the main agent feeding valve 72 and the curing agent feeding valve 73 are oppositely arranged on both sides of the housing of the control area 6, and the main agent metering pump 91 and the curing agent metering pump 92 are arranged on adjacent side walls. Therefore, the detour degree of the pipeline arrangement is minimized, and it is convenient to carry out the ratio of the main agent and the curing agent. In some embodiments, the heights of the main agent feeding valve 72 and the curing agent feeding valve 73 are set slightly higher than the heights of the main agent metering pump 91 and the curing agent metering pump 92, and one end of the pipeline connecting the main agent feeding valve 72 and the main agent metering pump 91, and the pipeline connecting the curing agent feeding valve 73 and the curing agent metering pump 92 is connected to the bottom of the main agent feeding valve 72 and the curing agent feeding valve 73, and the other end is connected to the top of the main agent metering pump 91 and the curing agent metering pump 92. This is to ensure that the liquid material entering the metering pump can be accurately dosed.

[0037] In some embodiments, the paint supply module of the present invention further includes a filtering unit. The filtering unit includes a first filter 111, a second filter 112, and a third filter 113 for filtering the main agent, the curing agent, and the solvent. The first filter 111 is arranged upstream of the first pressure regulator 81; the second filter 112 is arranged upstream of the second pressure regulator 82.

[0038] In some embodiments, the paint supply module of the present invention is further provided with a cleaning solvent storage tank 5. The cleaning solvent storage tank 5 can be respectively communicated with the curing agent storage tank 4 and the solvent storage tank, and further includes a communicating pipeline that communicates the feeding pipeline of the main agent and the feeding pipeline of the curing agent. In some embodiments, the communicating pipeline is respectively connected to the main agent feeding valve 72 and the curing agent feeding valve 73. Therefore, only by connecting the feeding pipeline of the cleaning solvent to any one of the feeding pipelines of the main agent and the curing agent, the main agent mixing tank 3, the curing agent storage tank 4, and the feeding pipelines and discharging pipelines communicating between them and the control area 6 can be fully cleaned before the material is switched. Thus, the paint supply module of the present invention integrates ratio preparation, filtration, paint supply, spraying, and cleaning, increases the integration of the paint spraying module, and can meet the diverse use requirements of paint spraying.

[0039] In some embodiments, the bottoms of the main agent mixing tank 3, the curing agent storage tank 4, and the cleaning solvent storage tank 5 are all provided with a tank bottom structure protruding downward, and the material discharging pipelines of each tank body are arranged corresponding to the protruding tank bottom structure. Therefore, it is convenient to completely discharge the materials in the tank.

[0040] Example 4: This embodiment is a speed regulation method for a pneumatic motor, including the following steps: STEP 01: Configure the air intake cavity 1: Configure an intake cavity 1 with an adjustable volume, and the maximum volume of the intake cavity 1 is V max , and connect the intake cavity 1 to the working gas accommodation cavity inside the pneumatic motor.

[0041] In some embodiments, the intake cavity 1 in step STEP 01 can adjust its volume through the deformation of the diaphragm 2, so as to control the intake air volume into the working gas accommodation cavity inside the pneumatic motor.

[0042] STEP 02: Measure the exhaust pressure P of the pneumatic motor, and set a relationship that is inversely related to the volume of the intake cavity 1: Collect the exhaust pressure P at the exhaust port of the pneumatic motor, and set an inversely related relationship between the volume V of the intake cavity 1 and P; that is, as P increases, V decreases correspondingly, resulting in a smaller volume of gas entering the intake cavity 1. Therefore, the volume of the high-pressure gas replenished from the intake cavity 1 into the working gas accommodation cavity inside the pneumatic motor also decreases. The relationship between P and V can be a linear or non-linear inverse proportional relationship.

[0043] In some embodiments, this inversely related relationship can be achieved through the deformation of the diaphragm 2, and the diaphragm 2 will automatically adjust the volume of the intake cavity 1 under different exhaust pressures P.

[0044] STEP 03: Set the exhaust pressure of the pneumatic motor at the target stirring speed, and compare it with the actual exhaust pressure to adjust the volume of the intake cavity 1: Taking the target stirring speed of the pneumatic motor as R0, when the stirring speed of the pneumatic motor is R0, the volume of the intake cavity 1 reaches the maximum V max , and the exhaust pressure at this time is P0, When the stirring speed of the pneumatic motor is greater than R0, the actual exhaust pressure P > P0, then reduce the volume of the intake cavity 1; When the stirring speed of the pneumatic motor is less than R0, the actual exhaust pressure P < P0, then increase the volume of the intake cavity 1.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A speed regulating mechanism for a pneumatic motor, characterized in that: It includes an air intake cavity, which is connected to an external air source. The invention also includes a diaphragm, which forms at least a part of the wall of the air inlet cavity, and is provided with at least one air inlet. The diaphragm can move toward or away from the air inlet cavity body under the action of air pressure. The diaphragm is deformed according to the exhaust pressure of the pneumatic motor, and the air inlet is connected to the working gas containing chamber inside the pneumatic motor.

2. A stirring device, characterized in that: It includes the speed regulating mechanism for a pneumatic motor as described in claim 1.

3. A paint supply module, characterized in that: It comprises the speed regulating mechanism for the pneumatic motor as described in claim 1 or the stirring device as described in claim 2.

4. The paint supply module according to claim 3, characterized in that: It also includes a main agent supply unit and a curing agent supply unit, wherein the main agent supply unit includes a main agent stirring tank, and the curing agent supply unit includes a curing agent storage tank. The main agent stirring tank utilizes an air motor to drive a stirring paddle, and also includes a speed regulating mechanism for an air motor as described in claim 1.

5. The paint supply module according to claim 4, characterized in that: It also includes a control area for mixing the main agent and the curing agent. The main agent is connected to the control area through a pipeline, and the main agent can circulate between the main agent stirring tank and the control area.

6. The paint supply module according to claim 5, characterized in that: The control zone is provided with a main agent feed valve, and also includes a main agent reflux pipeline which is respectively connected with the main agent feed valve and the main agent stirring tank.

7. The paint supply module according to claim 6, characterized in that: It also includes a pressure stabilizing unit, which includes a first pressure regulator arranged downstream of the discharge pump of the main agent stirring tank and a second pressure regulator arranged downstream of the discharge pump of the curing agent storage tank.

8. The paint supply module according to claim 7, characterized in that: It also includes a filtering unit, which includes a first filter, a second filter and a third filter for filtering the main agent, the curing agent and the solvent. The first filter is arranged upstream of the first pressure regulator; the second filter is arranged upstream of the second pressure regulator.

9. The paint supply module according to any one of claims 4 to 8, characterized in that: A cleaning solvent storage tank is also provided, which can be communicated with the curing agent storage tank and the solvent storage tank respectively, and also includes a connecting pipe connecting the main agent feeding pipe and the curing agent feeding pipe.

10. A method for regulating the speed of a pneumatic motor, characterized in that: The steps include: STEP 01: Configure the air intake cavity: Configure an air intake cavity with an adjustable volume, with the maximum volume of the air intake cavity being V max , connecting the air inlet cavity with the working gas containing cavity inside the pneumatic motor; STEP 02: Measure the exhaust pressure P of the pneumatic motor and set it to be inversely correlated with the volume of the intake chamber: STEP 03: Set the exhaust pressure of the air motor at the target stirring speed and compare it with the actual exhaust pressure to adjust the volume of the air inlet chamber: The target stirring speed of the air motor is R0. When the stirring speed of the air motor is R0, the volume of the air inlet cavity reaches V max , the exhaust pressure at this time is P0, When the stirring speed of the pneumatic motor is greater than R0, the actual exhaust pressure P>P0, which reduces the volume of the air intake cavity; When the stirring speed of the pneumatic motor is less than R0, the actual exhaust pressure P<P0, and the volume of the air intake cavity is increased.

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