Multifunctional valve group special for sand blasting machine

Abstract

The utility model discloses a multifunctional sand blasting machine special valve group, including valve seat, install first solenoid valve, second solenoid valve and third solenoid valve on the valve seat, be equipped with air inlet channel on the valve seat, air inlet channel is installed with filter device, filter device includes connecting sleeve, first filter sleeve, second filter sleeve and fixed sleeve, connecting sleeve is inserted in air inlet channel, first filter sleeve is installed in the through cavity, be equipped with first limit portion in the through cavity, the beneficial effect of the utility model is as follows: the function of first filter sleeve is to carry out the filtration to particulate impurity, the function of second filter sleeve is to filter oiliness impurity, thereby can prevent the condition that electromagnetic valve inside is caused because of pollutant, make the valve core and the mixed impurity dirt around the movable core, and further cause electromagnetic valve to be unable normal closing or opening.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, and in particular to a multi-functional valve group for sandblasting machines. Background Technology

[0002] A sandblasting machine is a device that treats the surface of workpieces, teeth, and other products by spraying abrasive at high speed. Its working efficiency and treatment effect largely depend on the coordinated operation of various components. As a key component for controlling the delivery of abrasive and compressed air, the valve group directly affects the stability, accuracy, and applicability of the sandblasting machine.

[0003] A typical dental blasting machine requires connection to one or more spray guns, which are usually equipped with various types of cleaning heads. Therefore, it needs to be matched with corresponding solenoid valves to control the airflow of each spray gun. However, the working medium in the blasting machine may contain impurities and particles. These contaminants can easily enter the solenoid valve, causing dirt to accumulate around the moving iron core, preventing the solenoid valve from closing or opening properly, and potentially causing internal leakage. In addition, some corrosive media may corrode the internal components of the solenoid valve, shortening its service life. Therefore, it is urgent to improve this shortcoming. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems. This invention provides a multi-functional valve assembly for sandblasting machines, which has the advantage of filtering the working medium of the sandblasting machine.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-functional sandblasting machine special valve assembly, including a valve seat, on which a first solenoid valve, a second solenoid valve, and a third solenoid valve are installed. The valve seat has an air inlet channel, and a filter device is installed in the air inlet channel. The filter device includes a connecting sleeve, a first filter sleeve, a second filter sleeve, and a fixing sleeve. The connecting sleeve is inserted into the air inlet channel and has a through cavity. The first filter sleeve is installed in the through cavity and has a first filter chamber. The second filter sleeve is installed inside the first filter sleeve, and the first and second filter sleeves are fixed to the connecting sleeve by the fixing sleeve.

[0006] Preferably, the through cavity is provided with a first limiting part, the first filter sleeve is provided with a first mating part, the first mating part is limited and mated with the first limiting part, the first filter cavity is provided with a second limiting part, and the second filter sleeve is limited and mated with the second limiting part.

[0007] Preferably, the inner wall of the first filter chamber is provided with a guide groove extending along the axis of the through chamber, and the outer peripheral wall of the second filter sleeve is provided with a guide block that slides with the guide groove.

[0008] Preferably, the fixing sleeve is provided with an annular groove, and a first sealing ring is installed in the annular groove. The first sealing ring is in sealing fit with the connecting sleeve and the fixing sleeve. A second sealing ring is in sealing fit between the air intake channel and the connecting sleeve, and the second sealing ring is sleeved on the outer periphery of the connecting sleeve.

[0009] Preferably, the fixing sleeve and the connecting sleeve are detachably fixed together.

[0010] Preferably, the valve seat is further provided with an air outlet channel, a connection port and several air blowing ports. The first solenoid valve includes a valve body and a sleeve. The valve body is fixedly installed on the valve seat. The sleeve is fixedly installed on the valve body by a pressure plate. The sleeve has a valve cavity. A stationary iron core is sealed and fixed at the top of the valve cavity. A coil is sleeved on the outer periphery of the stationary iron core. A moving iron core is provided inside the valve cavity. The moving iron core is slidably fitted between the valve body and the stationary iron core. A spring is abutted between the moving iron core and the sleeve. The spring always has the tendency to push the moving iron core to close the valve port. An air outlet is provided on the valve body. The air outlet is connected to the valve cavity through a valve port. The valve port is matched with the moving iron core. An air inlet connected to the valve cavity is also provided on the valve body. The first solenoid valve, the second solenoid valve, and the third solenoid valve have the same structure. The air inlet of the first solenoid valve is connected to the air inlet channel through the first air path, and the air outlet of the first solenoid valve is connected to the corresponding air outlet through the second air path. The air inlet of the second solenoid valve is connected to the air inlet channel through the third air path, and the air outlet of the second solenoid valve is connected to the air outlet channel and the corresponding air outlet through the fourth air path. The air inlet of the third solenoid valve is connected to the air outlet through the fifth air passage, and the fifth air passage is connected to the fourth air passage through the air outlet. The air outlet of the third solenoid valve is connected to the corresponding air blowing port through the sixth air passage.

[0011] Preferably, the air inlet, air outlet, connection port and air blowing port of the fixed sleeve are all equipped with connectors, and the ends of the connectors are all toothed.

[0012] Preferably, the bottom of the moving iron core is provided with a sealing gasket that cooperates with the opening and closing of the valve port.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a multi-functional valve assembly for sandblasting machines. The first filter sleeve filters particulate impurities, and the second filter sleeve filters oil impurities. This prevents contaminants from entering the solenoid valve and causing impurities and dirt to accumulate around the valve core and moving iron core, thus preventing the solenoid valve from closing or opening properly. At the same time, the first and second sealing rings can prevent air intake leakage. In addition, the fixed sleeve and the connecting sleeve adopt a detachable fixed fit, which makes it easier to replace the first and second filter sleeves. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the valve seat and filter device of this utility model; Figure 4 This is a perspective three-dimensional structural diagram of the valve seat of this utility model; Figure 5 This is a cross-sectional structural diagram of the valve seat and filter device of this utility model; Figure 6 for Figure 5 A magnified structural diagram of A in the middle; Figure 7 This is an exploded three-dimensional structural diagram of the filtration device of this utility model; Figure 8 This is a three-dimensional structural diagram of the first solenoid valve of this utility model.

[0015] Figure Descriptions: 1. Valve seat; 101. First air passage; 102. Second air passage; 103. Third air passage; 104. Fourth air passage; 105. Fifth air passage; 106. Sixth air passage; 11. Air inlet channel; 12. Air outlet; 13. Air outlet channel; 14. Connection port; 2.1. First solenoid valve; 2.2. Second solenoid valve; 2.3. Third solenoid valve; 201. Valve port; 202. Air inlet; 203. Air outlet; 21. Valve body; 22. Coil; 23. Pressure plate; 24. 25. Sleeve; 26. Stationary iron core; 27. Moving iron core; 28. Sealing gasket; 29. ​​Third sealing ring; 20. Spring; 31. Filter device; 32. Connecting sleeve; 33. First mating part; 34. First limiting part; 35. Fixing sleeve; 36. Annular groove; 37. First filter sleeve; 38. First filter chamber; 39. Second limiting part; 30. Guide groove; 31. Second filter sleeve; 32. Guide block; 33. First sealing ring; 34. Second sealing ring; 4. Connector. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 - Figure 8 As shown, a multi-functional sandblasting machine valve assembly includes a valve seat 1. A first solenoid valve 2.1, a second solenoid valve 2.2, and a third solenoid valve 2.3 with identical structures are mounted on the valve seat 1. An air inlet channel 11 is provided on the valve seat 1, and a filter device 3 is installed in the air inlet channel 11. The filter device 3 includes a connecting sleeve 31, a first filter sleeve 33, a second filter sleeve 34, and a fixing sleeve 32. The connecting sleeve 31 is inserted into the air inlet channel 11 and has a through cavity. The first filter sleeve 33 is installed in the through cavity, and a first limiting part 311 is provided in the through cavity. The outer periphery of the first filter sleeve 33 has a first mating part 310. The first mating part 310 of the first filter sleeve 33 engages with the first limiting part 311, thereby limiting the first filter sleeve 33 to a certain position. The first filter sleeve 33 has a first filter cavity 330 inside, and the second filter sleeve 34 is installed inside the first filter sleeve 33. The first filter cavity 330 has a second limiting part 331, and the second filter sleeve 34 is limited by the second limiting part 331. The first filter sleeve 33 and the second filter sleeve 34 are fixed to the connecting sleeve 31 by the fixing sleeve 32. The fixing sleeve 32 and the connecting sleeve 31 are detachably fixed. In this application, the fixing sleeve 32 and the connecting sleeve 31 are threaded together. Therefore, when the first filter sleeve 33 and the second filter sleeve 34 have been used for a certain period or their performance deteriorates, the first filter sleeve 33 and the second filter sleeve 34 can be replaced by removing the fixing sleeve 32 from the connecting sleeve 31. This disassembly and assembly method is more convenient and can reduce replacement and usage costs.

[0018] The function of the first filter sleeve 33 is to filter particulate impurities, and the function of the second filter sleeve 34 is to filter oil impurities. This can prevent contaminants from entering the solenoid valve and causing impurities and dirt to mix around the moving iron core 26, which would lead to the solenoid valve being unable to close or open normally. It can also prevent problems such as internal leakage.

[0019] The fixed sleeve 32 is provided with an annular groove 320, and a first sealing ring 35 is installed in the annular groove 320. The first sealing ring 35 is sealed and fitted with the connecting sleeve 31 and the fixed sleeve 32. A second sealing ring 36 is sealed and fitted between the air intake channel 11 and the connecting sleeve 31. The second sealing ring 36 is sleeved on the outer periphery of the connecting sleeve 31 to prevent gas leakage in the air intake channel 11.

[0020] The inner wall of the first filter chamber 330 is provided with a guide groove 332 extending along the axis of the through chamber. The outer peripheral wall of the second filter sleeve 34 is provided with a guide block 341 that slides with the guide groove 332. The number of guide grooves 332 mentioned in this application is four, and these four guide grooves 332 are evenly distributed along the circumference of the first filter sleeve 33. The number of guide blocks 341 is the same as the number of guide grooves 332, and the guide blocks 341 are matched with the corresponding guide grooves 332 one by one. The cooperation between the guide blocks 341 and the guide grooves 332 can not only guide the installation of the second filter sleeve 34, but also effectively avoid relative rotation between the second filter sleeve 34 and the first filter sleeve 33, thereby preventing friction between the first filter sleeve 33 and the second filter sleeve 34, and ultimately improving the service life of the filter device 3.

[0021] The valve seat 1 is also provided with an air outlet channel 13, a connection port 14, and several air blowing ports 12. The first solenoid valve 2.1 includes a valve body 21 and a sleeve 24. The valve body 21 is fixedly installed on the valve seat 1, and the sleeve 24 is fixedly installed on the valve body 21 by a pressure plate 23. The sleeve 24 has a valve cavity, and a stationary iron core 25 is sealed and fixed at the top of the valve cavity. A coil 22 is sleeved on the outer periphery of the stationary iron core 25. A moving iron core 26 is provided inside the valve cavity, and the moving iron core 26 is slidably fitted to the valve body 21. Between the stationary iron core 25 and the moving iron core 26 and the sleeve 24, a spring 28 is provided. The spring 28 always has the tendency to push the moving iron core 26 to close the valve port 201. The valve body 21 is provided with an air outlet 203. The air outlet 203 is connected to the valve cavity through the valve port 201. The valve port 201 is configured to cooperate with the moving iron core 26. The valve body 21 is also provided with an air inlet 202 that connects to the valve cavity. A third sealing ring 27 is provided between the sleeve 24 and the valve body 21 for sealing cooperation. The bottom of the moving iron core 26 is provided with a sealing gasket 261 that cooperates with the opening and closing of the valve port 201; Since the structures of the first solenoid valve 2.1, the second solenoid valve 2.2, and the third solenoid valve 2.3 are the same, they will not be described again here.

[0022] The air inlet 202 of the first solenoid valve 2.1 is connected to the air inlet channel 11 through the first air passage 101, and the air outlet 203 of the first solenoid valve 2.1 is connected to the corresponding air outlet 12 through the second air passage 102. The air inlet 202 of the second solenoid valve 2.2 is connected to the air inlet channel 11 through the third air passage 103, and the air outlet 203 of the second solenoid valve 2.2 is connected to the air outlet channel 13 and the corresponding air outlet 12 through the fourth air passage 104. The air inlet 202 of the third solenoid valve 2.3 is connected to the air outlet 13 through the fifth air passage 105, and the fifth air passage 105 is connected to the fourth air passage 104 through the air outlet 13. The air outlet 203 of the third solenoid valve 2.3 is connected to the corresponding air blowing port 12 through the sixth air passage 106.

[0023] In this application, the connection port 14 and all the air outlets 12 are connected to external airlock valves. The airlock valves connected to the air outlets 12 are respectively connected to spray guns with different functions. The airlock valves connected to the connection port 14 are connected to external devices. When the external devices need to blow air, gas is blown out through the connection port 14. Therefore, when different solenoid valves are activated, different spray guns can be prompted to perform air jet operation.

[0024] The air inlet, air outlet channel 13, connection port 14 and air blowing port 12 of the fixed sleeve 32 are all equipped with connectors 4, and the ends of the connectors 4 are all toothed.

[0025] This application includes two first solenoid valves 2.1, one second solenoid valve 2.2, and one third solenoid valve 2.3, such that the air inlets 202 of the two first solenoid valves 2.1 and the second solenoid valve 2.2 share the same air intake through the air intake channel 11. The air inlet 202 of the third solenoid valve 2.3 is connected to the air outlet 203 of the second solenoid valve 2.2. Since the second solenoid valve 2.2 is a two-position two-way solenoid valve, there will be residual gas in the pipeline when the second solenoid valve 2.2 is not working. At this time, the air lock valve will not reset. Therefore, the third solenoid valve 2.3 is activated at this time, so that the residual gas in the pipeline is discharged through the air outlet 12 of the third solenoid valve 2.3.

[0026] The first solenoid valve 2.1, the second solenoid valve 2.2, and the third solenoid valve 2.3 in this application are all direct-acting normally closed two-position two-way solenoid valves.

[0027] In practical use: When sandblasting is required through the spray gun corresponding to the first solenoid valve 2.1, the control system controls the first solenoid valve 2.1 to open. At this time, the compressed air in the air intake channel 11 passes through the through cavity of the connecting sleeve 31, the first filter cavity 330 of the first filter sleeve 33, and the second filter sleeve 34, and then enters the air inlet 202 of the first solenoid valve 2.1 through the first air passage 101. It is then delivered from the air outlet 203 of the first solenoid valve 2.1 through the second air passage 102 to the corresponding air blowing port 12, thereby driving the spray gun connected to the air blowing port 12 to work. When the spray gun corresponding to the second solenoid valve 2.2 needs to be activated, the control system controls the second solenoid valve 2.2 to open. Compressed air enters the air inlet 202 of the second solenoid valve 2.2 through the air inlet channel 11 and the third air passage 103. Part of the gas is delivered from the air outlet 203 of the second solenoid valve 2.2 through the fourth air passage 104 to the corresponding air outlet 12 to drive the spray gun, while the other part of the gas enters the air outlet channel 13. If the spray gun corresponding to the third solenoid valve 2.3 needs to be used, the control system controls the third solenoid valve 2.3 to open. The gas in the air outlet channel 13 enters the air inlet 202 of the third solenoid valve 2.3 through the fifth air passage 105, and then is sent from its air outlet 203 through the sixth air passage 106 to the corresponding air outlet 12, so as to realize the spray function of the corresponding spray gun.

[0028] Throughout the entire operation, the first sealing ring 35 and the second sealing ring 36 effectively ensure the airtightness of the gas in the transmission path, preventing leakage. The toothed connector 4 enhances the stability of the connection with external pipelines, preventing loose connections from affecting the stability of the sandblasting operation. Simultaneously, the cooperation between the guide block 341 and the guide groove 332 ensures the precise positioning of the second filter sleeve 34 within the first filter chamber 330, reducing shaking during the filtration process and improving filtration efficiency and service life.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional valve assembly for a sandblasting machine, comprising a valve seat (1), wherein a first solenoid valve (2.1), a second solenoid valve (2.2), and a third solenoid valve (2.3) are mounted on the valve seat (1), and an air inlet channel (11) is provided on the valve seat (1), characterized in that: The air intake channel (11) is equipped with a filter device (3). The filter device (3) includes a connecting sleeve (31), a first filter sleeve (33), a second filter sleeve (34), and a fixing sleeve (32). The connecting sleeve (31) is inserted into the air intake channel (11). The connecting sleeve (31) has a through cavity. The first filter sleeve (33) is installed in the through cavity. The first filter sleeve (33) has a first filter cavity (330). The second filter sleeve (34) is installed in the first filter sleeve (33). The first filter sleeve (33) and the second filter sleeve (34) are fixed in the connecting sleeve (31) by the fixing sleeve (32).

2. The multi-functional sandblasting machine valve assembly according to claim 1, characterized in that: The through cavity is provided with a first limiting part (311), the first filter sleeve (33) is provided with a first mating part (310), the first mating part (310) and the first limiting part (311) are mutually limiting and mating, the first filter cavity (330) is provided with a second limiting part (331), the second filter sleeve (34) and the second limiting part (331) are mutually limiting and mating.

3. The multi-functional sandblasting machine valve assembly according to claim 2, characterized in that: The inner wall of the first filter chamber (330) is provided with a guide groove (332) extending along the axis of the through chamber, and the outer peripheral wall of the second filter sleeve (34) is provided with a guide block (341) that slides with the guide groove (332).

4. The multi-functional sandblasting machine valve assembly according to claim 1, characterized in that: The fixed sleeve (32) is provided with an annular groove (320), and a first sealing ring (35) is installed in the annular groove (320). The first sealing ring (35) is sealed and fitted with the connecting sleeve (31) and the fixed sleeve (32). A second sealing ring (36) is sealed and fitted between the air intake channel (11) and the connecting sleeve (31). The second sealing ring (36) is fitted around the outer periphery of the connecting sleeve (31).

5. The multi-functional sandblasting machine valve assembly according to claim 1, characterized in that: The fixing sleeve (32) and the connecting sleeve (31) are detachably fixed together.

6. The multi-functional sandblasting machine valve assembly according to claim 1, characterized in that: The valve seat (1) is also provided with an air outlet channel (13), a connection port (14) and several air blowing ports (12). The first solenoid valve (2.1) includes a valve body (21) and a sleeve (24). The valve body (21) is fixedly installed on the valve seat (1). The sleeve (24) is fixedly installed on the valve body (21) by a pressure plate (23). The sleeve (24) has a valve cavity. A stationary iron core (25) is sealed and fixed at the top of the valve cavity. A coil (22) is sleeved on the outer periphery of the stationary iron core (25). A moving iron core (26) is provided inside the valve cavity. The core (26) is slidably fitted between the valve body (21) and the stationary iron core (25). A spring (28) is provided between the moving iron core (26) and the sleeve (24). The spring (28) always has the tendency to push the moving iron core (26) to close the valve port (201). The valve body (21) is provided with an air outlet (203). The air outlet (203) is connected to the valve cavity through the valve port (201). The valve port (201) is fitted with the moving iron core (26). The valve body (21) is also provided with an air inlet (202) that connects to the valve cavity. The first solenoid valve (2.1), the second solenoid valve (2.2), and the third solenoid valve (2.3) have the same structure; The air inlet (202) of the first solenoid valve (2.1) is connected to the air inlet channel (11) through the first air passage (101), and the air outlet (203) of the first solenoid valve (2.1) is connected to the corresponding air outlet (12) through the second air passage (102). The air inlet (202) of the second solenoid valve (2.2) is connected to the air inlet channel (11) through the third air passage (103), and the air outlet (203) of the second solenoid valve (2.2) is connected to the air outlet channel (13) and the corresponding air blowing port (12) through the fourth air passage (104). The air inlet (202) of the third solenoid valve (2.3) is connected to the air outlet (13) through the fifth air passage (105), and the fifth air passage (105) is connected to the fourth air passage (104) through the air outlet (13). The air outlet (203) of the third solenoid valve (2.3) is connected to the corresponding air blowing port (12) through the sixth air passage (106).

7. A multi-functional sandblasting machine valve assembly according to claim 6, characterized in that: The air inlet, air outlet (13), connection port (14) and air blowing port (12) of the fixed sleeve (32) are all equipped with connectors (4), and the ends of the connectors (4) are all tooth-shaped.

8. A multi-functional sandblasting machine valve assembly according to claim 7, characterized in that: The bottom of the moving iron core (26) is provided with a sealing gasket (261) that cooperates with the opening and closing of the valve port (201).

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