Speed regulating mechanism, stirring device and paint supply module

Abstract

The utility model discloses a speed regulating mechanism, a stirring device and a paint supply module, the speed regulating mechanism used for a pneumatic motor comprises an air inlet cavity which is communicated with an external air source, the speed regulating mechanism also comprises a diaphragm, the diaphragm forms at least partial area of the wall part of the air inlet cavity, at least one air inlet is arranged on the diaphragm, and the air inlet is communicated with the external air source. 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 utilizing the paint supply module disclosed by the utility model, the stirring speed in the main agent stirring tank can be always kept in a relatively stable range, and the requirement on the explosion-proof working environment of the water-based paint can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a paint spraying device technical field, concretely relates to a speed regulation mechanism, stirring device, paint supply module. BACKGROUND

[0002] In recent years, with the increasing requirement of product environmental protection, water-based paint gradually occupies more and more market share.But, when water-based paint is sprayed, the spraying requirement is higher: on the one hand, in order to overcome the problem that water-based paint is easy to stick to the wall or deposit, it must be kept stirring during the spraying process; on the other hand, the stirring speed cannot be too fast, otherwise water-based paint is easy to break emulsion.

[0003] In addition, the explosion-proof performance requirement when spraying in the paint spray booth is also high.Therefore, the use of electrical or live facilities needs to be reduced to the greatest extent.Therefore, the industry usually uses a pneumatic motor to stir water-based paint.However, as the material in the stirring tank changes continuously, the stirring speed of the pneumatic motor is also difficult to keep relatively stable, and therefore, how to achieve a relatively stable stirring speed during the spraying process of water-based paint is still a challenge in the spraying industry. SUMMARY

[0004] In order to solve the above technical problems, one of the purposes of the utility model is to provide a speed regulation mechanism for a pneumatic motor, which comprises an air inlet cavity,

[0005] and further comprises a diaphragm, the diaphragm forms at least part of the wall of the air inlet cavity, at least one air inlet is provided on the diaphragm, the diaphragm can move towards 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 in communication with the working gas containing cavity inside the pneumatic motor.

[0006] Therefore, by adding an air inlet cavity to the traditional pneumatic motor and adjusting the air inlet amount of the air inlet cavity through the movement of the diaphragm, when the speed of the pneumatic motor is fast, the air pressure fed back in the air outlet of the pneumatic motor is large, at this time, the diaphragm is deformed to the side close to the air inlet cavity under the pressure, and then the volume of the air inlet cavity is reduced, so that the air flow entering the air inlet cavity is small, and therefore, the air flow entering the pneumatic motor through the air inlet of the diaphragm is also small, so that the air flow supplementing the pneumatic motor is also reduced accordingly.Therefore, the speed of the pneumatic motor can be appropriately reduced, so that the speed of the pneumatic motor is in a dynamic and relatively stable state in the long term.

[0007] The second purpose of the utility model is to provide a stirring device, which comprises the speed regulation mechanism for the pneumatic motor.

[0008] The third purpose of the utility model is to provide a paint supply module, which comprises the speed regulating mechanism or the stirring device for the air motor.

[0009] Further, the paint supply module further comprises a main agent supply part and a curing agent supply part.

[0010] Further, the paint supply module further comprises a control area for mixing the main agent and the curing agent.

[0011] Further, the paint supply module further comprises a main agent supply part and a curing agent supply part.

[0012] Further, the paint supply module further comprises a main agent supply part and a curing agent supply part.

[0013] Further, the paint supply module further comprises a main agent supply part and a curing agent supply part.

[0014] Further, a cleaning solvent storage tank is provided, which is in communication with the curing agent storage tank and the solvent storage tank respectively, and further comprising a communication pipeline for the feeding pipeline of the main agent and the feeding pipeline of the curing agent.

[0015] The fourth purpose of the utility model is to provide a speed regulating method of a pneumatic motor, which comprises the following steps:

[0016] STEP 01: configuring an air inlet cavity

[0017] configuring an air inlet cavity with adjustable volume, taking the maximum volume of the air inlet cavity as V max , and connecting the air inlet cavity with the working gas cavity inside the pneumatic motor;

[0018] STEP 02: measuring the exhaust pressure P of the pneumatic motor and setting a reverse correlation between the volume of the air inlet cavity;

[0019] STEP 03: setting the exhaust pressure of the pneumatic motor at the target stirring speed and comparing it with the actual exhaust pressure to adjust the volume of the air inlet cavity:

[0020] when the target stirring speed of the pneumatic motor is R0, the volume of the air inlet cavity reaches V max when the stirring speed of the pneumatic motor is R0, and the exhaust pressure at this time is P0,

[0021] when the stirring speed of the pneumatic motor is greater than R0, the actual exhaust pressure P>P0, and the volume of the air inlet cavity is reduced;

[0022] when the stirring speed of the pneumatic motor is less than R0, the actual exhaust pressure P BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 it is a structure schematic view of the air inlet cavity of the utility model embodiment one without upper cover;

[0024] Figure 2 it is a sectional view of the air inlet cavity of the utility model embodiment one when the diaphragm is in normal state;

[0025] Figure 3It is the sectional view of the air inlet cavity of the embodiment one of the utility model when the diaphragm is in the state of being compressed and deformed;

[0026] Figure 4 It is the three-dimensional structure schematic diagram of the paint supply module of the embodiment three of the utility model;

[0027] Figure 5 It is the three-dimensional structure schematic diagram of the main agent stirring tank of the embodiment three of the utility model;

[0028] Figure 6 It is the local structure schematic diagram of the paint supply module of the embodiment three of the utility model;

[0029] Figure 7 It is the three-dimensional structure schematic diagram of the control area of the embodiment three of the utility model.

[0030] In the drawing,

[0031] 1, air inlet cavity;2, diaphragm;21, air inlet;3, main agent stirring tank;4, curing agent storage tank;5, cleaning solvent storage tank;6, control area;

[0032] 71, main agent return pipeline;72, main agent feed valve;73, curing agent feed valve;74, mixing cavity;81, first pressure regulator;82, second pressure regulator;83, third pressure regulator;84, safety valve;

[0033] 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. DETAILED DESCRIPTION

[0034] The advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model is more clearly defined, by the preferred embodiments of the utility model in combination with the drawings.

[0035] Embodiment one:

[0036] Referring to the drawings, Figure 1 The embodiment is a speed regulating mechanism for the pneumatic motor 12, which comprises an air inlet cavity 1, the air inlet cavity 1 is communicated with the air source outside, further comprises a diaphragm 2, the diaphragm 2 forms at least the wall part of the air inlet cavity 1, at least one air inlet 21 is arranged on the diaphragm 2, the diaphragm 2 can be moved towards the direction of being close to or away from the body of the air inlet cavity 1 under the action of air pressure. Thus, the volume of the air inlet cavity 1 changes by the deformation of the diaphragm 2, when the volume of the air inlet cavity 1 is small, the volume of the air entering it is small, thus, the volume of the gas discharged from the air inlet 21 will be small.

[0037] In some embodiments, the diaphragm 2 is directly configured as a complete wall portion of the intake chamber 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, with the intake inlet 21 connected to the working gas receiving chamber inside the pneumatic motor 12. In other possible embodiments, the diaphragm 2 may also be only a portion of one or more walls of the intake chamber 1.

[0038] Therefore, by adding an air intake chamber 1 to the conventional pneumatic motor 12, and adjusting the air intake volume of the air intake chamber 1 by moving the diaphragm 2, when the pneumatic motor 12 rotates at a higher speed, the feedback air pressure in the output air path of the pneumatic motor 12 is greater. At this time, the diaphragm 2 is subjected to greater pressure and deforms towards the side closer to the air intake chamber 1, thereby reducing the volume of the air intake chamber 1. Consequently, the airflow entering the air intake chamber 1 is smaller, and therefore the airflow entering the pneumatic motor 12 through the air intake inlet 21 of the diaphragm 2 is also reduced, thus correspondingly reducing the supplementary airflow to the pneumatic motor 12. Therefore, the rotational speed of the pneumatic motor 12 can be appropriately reduced, thereby keeping the overall rotational speed of the pneumatic motor 12 in a dynamically relatively stable state.

[0039] In some embodiments, the diaphragm 2 is located on the side of the air intake chamber 1 near the working gas receiving chamber inside the pneumatic motor 12, and the air inlet 21 of the diaphragm 2 is directly connected to the working gas receiving chamber inside the pneumatic motor 12. This makes the overall structure more compact and reduces the amount of air passage structure required. However, with this design, it is important to ensure that the output air passage of the pneumatic motor 12 can effectively apply force to the diaphragm 2.

[0040] The compensation adjustment method of the diaphragm 2 for the rotational speed of the pneumatic motor 12 is explained 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 air inlet chamber 1 reaches V. max At this time, the diaphragm 2 is also in an undeformed state (as shown in the figure), and the exhaust pressure is P0. When there is a small amount of material to be stirred in the mixing tank, since the pressure and total volume of the air inlet of the pneumatic motor 12 remain constant, the stirring speed of the pneumatic motor 12 gradually increases as the amount of material decreases. When the stirring speed of the pneumatic motor 12 is greater than R0, the air pressure at the air outlet of the pneumatic motor 12 increases, so the exhaust pressure P > P0. Therefore, the diaphragm 2 deforms under the action of the exhaust pressure, which reduces the volume of the air inlet chamber 1. As a result, the volume of gas that can enter the air inlet chamber 1 also decreases, and the air pressure compensated for by the pneumatic motor 12 also decreases. At this time, the stirring speed of the pneumatic motor 12 can be reduced until the exhaust pressure P ≤ P0, at which point the diaphragm 2 returns to its original shape.

[0041] Conversely, when the material in the stirring tank is relatively full, in order to drive the full stirring of the material, the energy consumption is greater, and therefore the stirring speed of the pneumatic motor 12 is reduced to be lower than the target stirring speed R0, the exhaust pressure P of the pneumatic motor 12 is P < P0, at this time, the volume of the air inlet cavity 1 reaches Vmax, therefore, more gas enters the air inlet cavity 1, and then the gas in the working gas containing cavity inside the pneumatic motor 12 through the air inlet 21 on the diaphragm 2 also gradually increases until it reaches the maximum. Thus, the stirring speed of the pneumatic motor 12 is always kept near the target stirring speed R0. Note that R0 is not a fixed value, but a speed range interval. For example, R0 is 50-55 rpm, as long as the actual stirring speed of the pneumatic motor 12 reaches any value (not limited to an integer) within this range interval, it means that the target stirring speed is R0.

[0042] The pneumatic motor 12 of the utility model can be a vane type pneumatic motor, a piston type pneumatic motor, a gear type pneumatic motor or other forms of pneumatic motor.

[0043] 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 is only necessary to ensure that the air inlet 21 of the diaphragm 2 can be communicated with the working gas containing cavity inside the pneumatic motor 12, and the output pressure value of the exhaust port of the pneumatic motor 12 can drive the diaphragm 2 to deform.

[0044] Embodiment two:

[0045] The embodiment is a stirring device comprising the speed regulating mechanism for the pneumatic motor of embodiment one. The stirring device can be applied to various scenes with high requirements for explosion-proof performance, but the stirring speed needs to be relatively stable, such as chemical industry, food processing, pharmaceutical industry, etc. By adopting the stirring device of the embodiment, the stirring speed can be automatically adjusted according to the actual working condition, and the stability and consistency of the stirring effect are ensured.

[0046] Embodiment three:

[0047] The embodiment is a paint supply module comprising the speed regulating mechanism for the pneumatic motor of embodiment one or the stirring device of embodiment two.

[0048] The paint supply module of the utility model further comprises a main agent supply part and a curing agent supply part, the main agent supply part comprises a main agent stirring tank 3, the curing agent supply part comprises a curing agent storage tank 4, the main agent stirring tank 3 drives the stirring paddle by using the pneumatic motor 12, and further comprises the speed regulating mechanism for the pneumatic motor of embodiment one.

[0049] In some embodiments, the paint supply module of the present application further comprises 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 flow circularly between the main agent stirring tank 3 and the control area 6. In this embodiment, a large circulation system is formed between the circulation pipeline and the main agent stirring tank 3. The circulation path of the main agent is intentionally extended to the control area 6, so as to avoid the precipitation or deterioration of the main agent in the pipeline due to the failure to use the main agent in time.

[0050] In some embodiments, since the curing agent is sensitive to humidity and oxygen, the material between the curing agent storage tank 4 and the control area 6 does not need to be circulated, but it is necessary to ensure sufficient sealing of the curing agent storage tank 4 and to pressurize and protect the curing agent storage tank 4 by introducing nitrogen or the like.

[0051] In some embodiments, the main agent feeding valve 72 and the curing agent feeding valve 73 are arranged in the control area 6, and the main agent return pipeline 71 is arranged to communicate with the main agent feeding valve 72 and the main agent stirring tank 3. Thus, the main agent can continuously return to the main agent stirring tank 3 through the main agent return pipeline 71. The main agent feeding valve 72 and the curing agent feeding valve 73 can be manifold structures or ordinary valve structures.

[0052] In some embodiments, the paint supply module of the present application further comprises a pressure stabilizing unit, which comprises a first pressure regulator 81 arranged downstream of the discharge pump of the main agent stirring tank 3, and a second pressure regulator 82 arranged downstream of the discharge pump of the curing agent storage tank 4. Thus, the delivery pressure of the main agent and the curing agent pumped into the control area 6 can be stabilized. In some embodiments, the pressure stabilizing unit further comprises a third pressure regulator 83 arranged downstream of the mixing chamber 74. After the pressure is stabilized by the third pressure regulator 83, the paint to be sprayed is sprayed through the spray gun 10, so as to ensure that the pressure of the paint to be sprayed is stable.

[0053] In some embodiments, a safety valve 84 is arranged at one end of the main agent return pipeline 71 close to the main agent stirring tank 3. Specifically, the safety valve 84 can be a back pressure valve. Thus, the pressure of the main agent returned to the main agent stirring tank 3 can be stabilized, and the pressure fluctuation of the material in the main agent stirring tank 3 can be prevented from being too large.

[0054] In some embodiments, the main agent stirring tank 3, the curing agent storage tank 4 and the solvent storage tank are respectively connected to an external air supply system. Thus, the supply and pumping of the main agent, the curing agent and the solvent can be ensured.

[0055] In some embodiments, a main agent metering pump 91 for metering the main agent and a curing agent metering pump 92 for metering the curing agent are further included. The main agent and the curing agent enter the mixing chamber after passing through the main agent metering pump 91 and the curing agent metering pump 92, respectively.

[0056] In some embodiments, the main agent feeding valve 72 and the curing agent feeding valve 73 are oppositely arranged on two sides of the shell of the control area 6, and the main agent metering pump 91 and the curing agent metering pump 92 are arranged on the adjacent side walls, so that the circumferential degree of the pipeline arrangement is minimized, and the proportioning of the main agent and the curing agent is facilitated. In some embodiments, the height of the main agent feeding valve 72 and the curing agent feeding valve 73 is slightly higher than the height of the main agent metering pump 91 and the curing agent metering pump 92, and 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 are connected to the bottom of the main agent feeding valve 72 and the curing agent feeding valve 73 at one end and connected to the top of the main agent metering pump 91 and the curing agent metering pump 92 at the other end. This is to ensure that the liquid entering the metering pump can be accurately dosed.

[0057] In some embodiments, the paint supply module of the utility model further comprises a filtering unit, the filtering unit comprising 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 being arranged upstream of the first pressure regulator 81; the second filter 112 being arranged upstream of the second pressure regulator 82.

[0058] In some embodiments, the paint supply module of the utility model is further provided with a cleaning solvent storage tank 5, the cleaning solvent storage tank 5 being capable of communicating with the curing agent storage tank 4 and the solvent storage tank respectively, further comprising a communication pipeline for communicating the main agent feeding pipeline and the curing agent feeding pipeline. In some embodiments, the communication pipeline is connected with the main agent feeding valve 72 and the curing agent feeding valve 73 respectively, so that only the cleaning solvent feeding pipeline needs to be communicated with any one of the main agent feeding pipeline and the curing agent feeding pipeline, and the main agent mixing tank 3, the curing agent storage tank 4 and the feeding pipeline and the discharging pipeline communicating between the control area 6 can be fully cleaned before the material switching. Thus, the paint supply module of the utility model integrates proportioning, filtering, paint supply, spraying and cleaning, increases the integration of the paint spraying module, and can meet the diversified use requirements of paint spraying.

[0059] In some embodiments, the bottom of the main agent mixing tank 3, the curing agent storage tank 4 and the cleaning solvent storage tank 5 is provided with a tank bottom structure protruding downward, and the material discharge pipeline of each tank body is arranged corresponding to the protruding tank bottom structure, so that the complete discharge of the tank material is facilitated.

[0060] Example four:

[0061] The embodiment is a speed regulation method of a pneumatic motor, comprising the following steps:

[0062] STEP 01: configure the intake cavity 1:

[0063] Configure an intake cavity 1 with adjustable volume, the maximum volume of the intake cavity 1 is V max , the intake cavity 1 is communicated with the working gas containing cavity inside the pneumatic motor.

[0064] In some embodiments, the intake cavity 1 in step STEP 01 can adjust the volume by the deformation of the diaphragm 2, so as to control the intake amount of the working gas into the working gas containing cavity inside the pneumatic motor.

[0065] STEP 02: measure the exhaust pressure P of the pneumatic motor, and set the volume of the intake cavity 1 in inverse proportion to P:

[0066] Collect the exhaust pressure P of the exhaust port of the pneumatic motor, and set the volume V of the intake cavity 1 in inverse proportion to P; that is, as P increases, V decreases accordingly, resulting in a smaller volume of high-pressure gas entering the working gas containing cavity inside the pneumatic motor from the intake cavity 1. The relationship between P and V can be linear or nonlinear inverse proportion.

[0067] In some embodiments, this inverse relationship can be achieved by the deformation of the diaphragm 2, which automatically adjusts the volume of the intake cavity 1 under different exhaust pressures P.

[0068] 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:

[0069] At the target stirring speed R0 of the pneumatic motor, the volume of the intake cavity 1 reaches the maximum V max , and the exhaust pressure at this time is P0,

[0070] When the stirring speed of the pneumatic motor is greater than R0, the actual exhaust pressure P>P0, then the volume of the intake cavity 1 is reduced;

[0071] When the stirring speed of the pneumatic motor is less than R0, the actual exhaust pressure P<P0, then the volume of the intake cavity 1 is increased.

[0072] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to let the person skilled in the art understand the content of the present application and implement it, and cannot limit the protection scope of the present application, any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A speed regulation mechanism for a pneumatic motor, characterized by: The air inlet cavity is in communication with an external air source, The air inlet cavity is in communication with an external air source, The diaphragm is deformed according to the exhaust pressure of the air motor, and the air inlet is in communication with the working gas cavity inside the air motor.

2. A stirring device, characterized by: The speed regulation mechanism for the air motor is provided.

3. A paint supply module, characterized by: The speed regulation mechanism for the air motor is provided.

4. The paint supply module of claim 3, wherein: The speed regulation mechanism for the air motor is provided.

5. The paint supply module of claim 4, wherein: The speed regulation mechanism for the air motor is provided.

6. The paint supply module of claim 5, wherein: The speed regulation mechanism for the air motor is provided.

7. The paint supply module of claim 6, wherein: The speed regulation mechanism for the air motor is provided.

8. The paint supply module of claim 7, wherein: The speed regulation mechanism for the air motor is provided.

9. A paint supply module according to any one of claims 4-8, characterized in that: The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. The speed regulation mechanism for the air motor is provided. 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