Air cylinder control fluid on-off structure and dental sand blasting equipment

Abstract

The utility model discloses an air cylinder control fluid on-off structure and dental sand blasting equipment, the fluid on-off structure comprises a quick connection base, an air cylinder body and an on-off device, the quick connection base is connected with an external air supply device, the connection end of the quick connection base is provided with a first connection part, the connection end of the air cylinder body is provided with a second connection part, and the first connection part is connected with the second connection part. And the second connecting part of the cylinder body is detachably connected with the first connecting part of the quick connecting base. According to the fluid on-off structure and the dental sand blasting equipment disclosed by the utility model, the first connecting part of the quick connecting base is detachably connected with the second connecting part of the air cylinder body, so that the quick connecting base and the air cylinder body can be quickly disassembled by the fluid on-off structure when maintenance is needed; according to the fluid on-off structure, all the components of the fluid on-off structure are maintained, so that the maintenance efficiency of all the components of the fluid on-off structure is improved, and the effect of rapid maintenance is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dental medical instrument technical field especially, relate to a cylinder control fluid on-off structure and dental sand blasting equipment. BACKGROUND

[0002] At present, sand blasting scaling in dentistry is through compressed air to drive sand blasting powder to spray to the tooth surface, and then combines with the liquid medium sprayed with the sand blasting powder, can impact the dental plaque and calculus on the tooth surface with certain kinetic energy, so as to achieve the effect of cleaning the tooth surface.

[0003] In practical application, in order to control the spraying of sand blasting powder to respond quickly, a control fluid on-off structure needs to be configured between the sand powder cavity and the nozzle in the dental sand blasting equipment.

[0004] However, in actual operation, after long-term use, the fluid on-off structure appears the conditions such as the air inlet of the cylinder being blocked, the powder in the cylinder being accumulated too much, etc., so it is difficult to maintain and maintain each component of the fluid on-off structure quickly. Therefore, how to provide a fluid on-off structure to improve the efficiency of maintaining and maintaining each component of the fluid on-off structure has become a problem to be solved. UTILITY MODEL CONTENT

[0005] The utility model embodiment discloses a cylinder control fluid on-off structure and dental sand blasting equipment, which can improve the efficiency of maintaining and maintaining each component of the fluid on-off structure, thereby realizing the effect of quick maintenance and maintenance.

[0006] In order to achieve the above purpose, in the first aspect, the utility model discloses a cylinder control fluid on-off structure, which comprises:

[0007] The quick connection base is connected with the external gas supply device, and the connecting end of the quick connection base has a first connecting part and a gas guide port;

[0008] The cylinder body has a gas pressure cavity in the inside, and the connecting end of the cylinder body has a second connecting part and an air inlet, the air inlet is communicated with the gas pressure cavity, the second connecting part of the cylinder body is detachably connected with the first connecting part of the quick connection base, and the air inlet of the cylinder body is arranged opposite to the gas guide port of the quick connection base;

[0009] The on-off device is arranged in the gas pressure cavity;

[0010] The gas supply device is used to ventilate the gas pressure cavity through the gas guide port and the air inlet, so as to switch the on-off state of the on-off device.

[0011] As an optional implementation, in the embodiment of the first aspect of the utility model, the first connecting part includes a base connecting hole, the second connecting part includes a cylinder connecting hole, and the base connecting hole and the cylinder connecting hole are detachably connected by screws.

[0012] As an optional implementation, in the embodiment of the first aspect of the utility model, the connecting end of the quick-connecting base and the connecting end of the cylinder body are both cylindrical structures, the radius of the cylinder of the connecting end of the quick-connecting base is greater than the radius of the cylinder of the connecting end of the cylinder body, so that the connecting end of the quick-connecting base can be sleeved on the outside of the connecting end of the cylinder body.

[0013] As an optional implementation, in the embodiment of the first aspect of the utility model, the base connecting hole includes a first connecting hole and a second connecting hole, the first connecting hole and the second connecting hole are arranged on the cylinder wall of the connecting end of the quick-connecting base with the center of the cylinder of the connecting end of the quick-connecting base as the center and at a preset connecting hole included angle; the cylinder connecting hole includes a third connecting hole and a fourth connecting hole, the third connecting hole and the fourth connecting hole are arranged on the cylinder wall of the connecting end of the cylinder body with the center of the cylinder of the connecting end of the cylinder body as the center and at the connecting hole included angle;

[0014] The first connecting hole and the third connecting hole are detachably connected by screws, and the second connecting hole and the fourth connecting hole are detachably connected by screws.

[0015] As an optional implementation, in the embodiment of the first aspect of the utility model, the on-off device includes:

[0016] A plug rod assembly is arranged at one end of the air pressure cavity close to the air inlet, the sealing end of the plug rod assembly is arranged towards the air inlet, the piston end of the plug rod assembly is arranged away from the air inlet, the piston end of the plug rod assembly has a piston through hole, and the piston end of the plug rod assembly is provided with a piston through hole in the vertical direction of the radial direction of the air pressure cavity.

[0017] An on-off assembly is arranged at one end of the air pressure cavity away from the air inlet, the on-off assembly is provided with a piston cavity in the radial direction of the air pressure cavity, the on-off assembly is provided with a fluid through hole in the vertical direction of the radial direction of the piston cavity, the fluid through hole is communicated with the piston cavity, and the piston end of the plug rod assembly is in contact with the inner wall of the piston cavity.

[0018] A rebounding piece is arranged between the plug rod assembly and the on-off assembly in the air pressure cavity.

[0019] The air supply device is used for supplying air to the air pressure cavity through the air inlet, so as to drive the sealing end of the plug rod assembly to compress the elastic piece in the direction away from the air inlet, and push the piston end of the plug rod assembly in the direction away from the air inlet, so that the piston end of the plug rod assembly blocks the communication of the fluid through hole; the elastic piece is used for pushing the piston end of the plug rod assembly towards the air inlet when the air supply device is not supplied with air, so that the fluid through hole is communicated through the piston through hole.

[0020] As an optional embodiment, in the embodiment of the first aspect of the utility model, the plug rod assembly comprises:

[0021] The plug rod base is arranged at one end of the air pressure cavity close to the air inlet, and the circumference of the plug rod base is in contact with the inner wall of the air pressure cavity to seal the air pressure cavity;

[0022] The plug rod body is connected to the side of the plug rod base away from the air inlet, and the plug rod body has a fixed through cavity, and the plug rod body is arranged in the piston cavity; wherein the elastic piece is sleeved on the plug rod body, one end of the elastic piece close to the air inlet is in contact with the side of the plug rod base away from the air inlet, and the other end of the elastic piece away from the air inlet is in contact with the side of the on-off assembly close to the air inlet;

[0023] The sealing sheet has a piston through hole, and the sealing sheet is arranged in the fixed through cavity, and the opposite two sides of the sealing sheet are in contact with the inner wall of the piston cavity respectively;

[0024] The air supply device is used for supplying air to the air pressure cavity through the air inlet, so as to drive the sealing end of the plug rod assembly to compress the elastic piece in the direction away from the air inlet, and push the piston end of the plug rod assembly in the direction away from the air inlet, so that the piston end of the plug rod assembly blocks the communication of the fluid through hole; the elastic piece is used for pushing the piston end of the plug rod assembly towards the air inlet when the air supply device is not supplied with air, so that the fluid through hole is communicated through the piston through hole.

[0025] As an optional embodiment, in the embodiment of the first aspect of the utility model, the on-off assembly comprises:

[0026] The outer shell is arranged at one end of the air pressure cavity away from the air inlet, and the outer shell is provided with a piston cavity in the radial direction of the air pressure cavity, and the outer shell is provided with a fluid through hole in the vertical direction of the radial direction of the air pressure cavity, and the fluid through hole is communicated with the piston cavity;

[0027] A first seal is arranged on a first inner surface of the piston cavity, and the first seal is provided with a first through hole in a vertical direction of a radial direction of the air pressure cavity, and the first through hole is communicated with the piston cavity;

[0028] A second seal is arranged on a second inner surface of the piston cavity, and the second seal is provided with a second through hole in a vertical direction of a radial direction of the air pressure cavity, and the second through hole is communicated with the piston cavity;

[0029] Wherein, the first inner surface and the second inner surface are two inner surfaces opposite to the piston cavity, the sealing surface of the first seal and the sealing surface of the second seal are oppositely arranged, the opposite two side surfaces of the sealing sheet are respectively in contact with the sealing surface of the first seal and the sealing surface of the second seal, and the first through hole and the second through hole are oppositely arranged.

[0030] As an optional embodiment, in the embodiment of the first aspect of the utility model, the shell body comprises:

[0031] A first base is provided with a third through hole, a first piston groove is arranged on a connecting side of the first base, a first fixing groove is arranged on an inner surface of the first piston groove, the first piston groove is communicated with the first fixing groove, the third through hole is communicated with the first fixing groove, the first seal is arranged in the first fixing groove, and the first through hole of the first seal is oppositely arranged with the third through hole of the first base;

[0032] A second base is provided with a fourth through hole, a second piston groove is arranged on a connecting side of the second base, a second fixing groove is arranged on an inner surface of the second piston groove, the second piston groove is communicated with the second fixing groove, the fourth through hole is communicated with the second fixing groove, the second seal is arranged in the second fixing groove, and the second through hole of the second seal is oppositely arranged with the fourth through hole of the second base;

[0033] Wherein, the connecting side of the first base and the connecting side of the second base are oppositely arranged, and the connecting side of the first base and the connecting side of the second base are connected, so that the first piston groove and the second piston groove form the piston cavity.

[0034] As an optional embodiment, in the embodiment of the first aspect of the utility model, the structure further comprises:

[0035] A first flow guide connector is arranged at the third through hole of the first base, and an interface of the first flow guide connector is communicated with the third through hole of the first base and the first through hole of the first seal respectively;

[0036] A second flow guide joint is arranged at a fourth through hole of the second base, and interfaces of the second flow guide joint are communicated with the fourth through hole of the second base and the second through hole of the first sealing piece respectively.

[0037] In a second aspect, the utility model discloses a dental sand blasting equipment, the equipment includes:

[0038] The cylinder control fluid on-off structure as claimed in the first aspect of the utility model;

[0039] A gas supply device is connected with the air inlet of the cylinder body, and is used for ventilating the gas pressure cavity through the air inlet.

[0040] A sand blasting flow guide pipe body is connected with the on-off device.

[0041] Compared with the prior art, the utility model has the beneficial effects that:

[0042] The cylinder control fluid on-off structure provided by the utility model is detachably connected through the first connecting part of the quick-connection base and the second connecting part of the cylinder body, and when maintenance is needed, the fluid on-off structure can be quickly detached from the quick-connection base and the cylinder body, so that each component of the fluid on-off structure can be maintained and repaired, thereby improving the efficiency of maintaining and repairing each component of the fluid on-off structure, and achieving the effect of quick maintenance and repair.

[0043] The dental sand blasting equipment provided by the utility model adopts the above-mentioned cylinder control fluid on-off structure, which is detachably connected through the first connecting part of the quick-connection base and the second connecting part of the cylinder body, and when maintenance is needed, the fluid on-off structure can be quickly detached from the quick-connection base and the cylinder body, so that each component of the fluid on-off structure can be maintained and repaired, thereby improving the efficiency of maintaining and repairing each component of the fluid on-off structure, and achieving the effect of quick maintenance and repair. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 Fig. 1 is a structural schematic view of the cylinder control fluid on-off structure in the utility model;

[0045] Figure 2 Fig. 2 is a structural schematic view of the connecting end of the quick-connection base and the connecting end of the cylinder body in the cylinder control fluid on-off structure of the utility model;

[0046] Figure 3 Fig. 3 is a structural schematic view of the quick-connection base in the cylinder control fluid on-off structure of one specific embodiment of the utility model;

[0047] Figure 4The utility model discloses a structure schematic diagram of the cylinder body in the cylinder control fluid on-off structure of one specific embodiment of the utility model.

[0048] Figure 5 The utility model discloses a front view of the cylinder control fluid on-off structure of one specific embodiment of the utility model.

[0049] Figure 6 The utility model discloses a structure schematic diagram of the cylinder control fluid on-off structure of one specific embodiment of the utility model.

[0050] Among them, the meaning of the sign is as follows:

[0051] Fast base 100, cylinder body 200, on-off device 300, plug rod assembly 310, plug rod base 311, plug rod body 312, sealing sheet 313, on-off assembly 320, shell 321, first base 3211, second base 3212, first sealing element 322, second sealing element 323, rebound element 330, first flow guide connector 400, second flow guide connector 500. Specific embodiments

[0052] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0053] In the utility model, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0054] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the utility model can be understood according to the specific situation.

[0055] In addition, the terms "mount", "set", "provided with", "connected", "linked" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0056] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated device, element or component. Unless otherwise stated, the meaning of "multiple" is two or more.

[0057] The technical scheme of the utility model will be further described below in conjunction with embodiments and drawings.

[0058] At present, sandblasting scaling in dentistry is achieved by driving sandblasting powder to the tooth surface by compressed air, and then combining with the liquid medium sprayed with sandblasting powder to impact dental plaque and calculus on the tooth surface with a certain kinetic energy, so as to clean the tooth surface.

[0059] In practical application, in order to control the spraying of sandblasting powder with fast response, a structure for controlling the on-off of fluid is needed between the sand powder cavity and the nozzle in the dental sandblasting equipment.

[0060] However, in actual operation, after a long time of use, the fluid on-off structure appears the situation of air inlet blockage of air cylinder, excessive powder accumulation in the air cylinder and other maintenance conditions, so it is difficult to quickly maintain and maintain each part of the fluid on-off structure. Therefore, how to provide an air cylinder control fluid on-off structure to improve the efficiency of maintaining and maintaining each part of the fluid on-off structure has become a problem to be solved.

[0061] To this end, the utility model embodiment discloses an air cylinder control fluid on-off structure and dental sandblasting equipment, which can improve the efficiency of maintaining and maintaining each part of the fluid on-off structure, thereby realizing the effect of fast maintenance and maintenance.

[0062] As Figure 1The utility model discloses a kind of cylinder control fluid on-off structure, the fluid on-off structure includes: quick-connecting base 100, cylinder body 200 and on-off device 300.Quick-connecting base 100 is connected with the gas supply device of outside, and the connecting end of quick-connecting base 100 has first connecting part and gas guide port;Cylinder body 200 has gas pressure cavity inside, and the connecting end of cylinder body 200 has second connecting part and air inlet, and air inlet is communicated with gas pressure cavity, and the second connecting part of cylinder body 200 is detachably connected with the first connecting part of quick-connecting base 100, and the air inlet of cylinder body 200 is oppositely arranged with the gas guide port of quick-connecting base 100;On-off device 300 is arranged in gas pressure cavity;Wherein, gas supply device is used to ventilate to gas pressure cavity through gas guide port and air inlet, to switch the on-off state of on-off device 300.

[0063] In the embodiment, refer to Figure 1 The top of quick-connecting base 100 is its connecting end, and the connecting end of quick-connecting base 100 is provided with first connecting part and gas guide port. The bottom end of cylinder body 200 is its connecting end, and the connecting end of cylinder body 200 is provided with second connecting part and air inlet, and the inside of cylinder body 200 has a gas pressure cavity with upper and lower longitudinal directions in radial direction, and air inlet is communicated with gas pressure cavity, and on-off device 300 is arranged in gas pressure cavity.

[0064] The first connecting part of quick-connecting base 100 can be detachably connected with the second connecting part of cylinder body 200, and when maintenance is needed, the fluid on-off structure can be quickly disassembled with quick-connecting base 100 and cylinder body 200 to maintain and repair each component of the fluid on-off structure, thereby improving the efficiency of maintaining and repairing each component of the fluid on-off structure. After quick-connecting base 100 is connected with cylinder body 200, the gas guide port of quick-connecting base 100 can be aligned with the air inlet of cylinder body 200, so that the gas supply of gas supply device can be delivered to the air inlet of cylinder body 200 through the gas guide port of quick-connecting base 100.

[0065] Further, the gas supply device can ventilate to the gas pressure cavity inside cylinder body 200 through the gas guide port of quick-connecting base 100 and the air inlet of cylinder body 200 to control the on-off state of on-off device 300. When on-off device 300 is in the off state, sand powder fluid cannot flow through on-off device 300, that is, the stop of sand powder fluid injection is realized. When on-off device 300 is in the on state, sand powder fluid can flow through on-off device 300, that is, the start of sand powder fluid injection is realized.

[0066] It can be seen that the fluid on-off structure is detachably connected through the first connecting part of the quick-connection base 100 and the second connecting part of the cylinder body 200, and when maintenance is needed, the fluid on-off structure can be quickly detached from the quick-connection base 100 and the cylinder body 200, so that the components of the fluid on-off structure can be maintained, thereby improving the efficiency of maintaining the components of the fluid on-off structure, and the effect of quick maintenance is achieved.

[0067] As shown in Figure 2 , in an optional embodiment, the first connecting part includes a base connecting hole, and the second connecting part includes a cylinder connecting hole, and the base connecting hole is detachably connected with the cylinder connecting hole through a screw.

[0068] In this optional embodiment, referring to Figure 2 , the first connecting part of the quick-connection base 100 has a base connecting hole, and the second connecting part of the cylinder body 200 has a cylinder connecting hole. When the base connecting hole is aligned with the cylinder connecting hole, the base connecting hole and the cylinder connecting hole can be detachably connected through a screw, so as to realize the connection between the quick-connection base 100 and the cylinder body 200.

[0069] It can be seen that the optional embodiment can also detachably connect the base connecting hole and the cylinder connecting hole through a screw, thereby improving the stability of the connection between the quick-connection base 100 and the cylinder body 200, and the detachable screw connection can also facilitate the quick detachment of the quick-connection base 100 and the cylinder body 200, so that the components of the fluid on-off structure can be maintained, thereby improving the efficiency of maintaining the components of the fluid on-off structure.

[0070] As shown in Figure 3 and Figure 4 , in an optional embodiment, the connecting end of the quick-connection base 100 and the connecting end of the cylinder body 200 are both cylindrical structures, and the radius of the connecting end of the quick-connection base 100 is greater than the radius of the connecting end of the cylinder body 200, so that the connecting end of the quick-connection base 100 can be sleeved on the outside of the connecting end of the cylinder body 200.

[0071] In this optional embodiment, referring to Figure 3 , the connecting end of the top of the quick-connection base 100 is cylindrical, and the bottom end of the internal cavity of the cylindrical connecting end is the air guide port of the quick-connection base 100. Referring to Figure 4 , the connecting end of the bottom of the cylinder body 200 is cylindrical, and the bottom end of the cylindrical connecting end is the air inlet of the cylinder body 200.

[0072] Since the design value of the radius of the connecting end of the quick-connection base 100 is greater than the design value of the radius of the connecting end of the cylinder body 200, referring to Figure 5The connecting end of the quick-connect base 100 can be sleeved outside the connecting end of the cylinder body 200, and the air guide port of the quick-connect base 100 can be aligned with the air inlet of the cylinder body 200 and sealed relative to the outside, so that the air supply of the air supply device can be delivered to the air inlet of the cylinder body 200 through the air guide port of the quick-connect base 100.

[0073] It can be seen that, by setting the cylinder radius of the connecting end of the quick-connect base 100 to be greater than the cylinder radius of the connecting end of the cylinder body 200, the connecting end of the quick-connect base 100 can be sleeved outside the connecting end of the cylinder body 200, thereby further improving the stability of the connection between the quick-connect base 100 and the cylinder body 200.

[0074] As shown in Figure 3 and Figure 4 , in an optional embodiment, the base connecting hole includes a first connecting hole and a second connecting hole, and the first connecting hole and the second connecting hole are arranged on the cylinder wall of the connecting end of the quick-connect base 100 with the cylinder center of the connecting end of the quick-connect base 100 as the center and at a preset connecting hole included angle. The cylinder connecting hole includes a third connecting hole and a fourth connecting hole, and the third connecting hole and the fourth connecting hole are arranged on the cylinder wall of the connecting end of the cylinder body 200 with the cylinder center of the connecting end of the cylinder body 200 as the center and at the connecting hole included angle. The first connecting hole and the third connecting hole are detachably connected by a screw, and the second connecting hole and the fourth connecting hole are detachably connected by a screw.

[0075] In this optional embodiment, the base connecting hole of the quick-connect base 100 includes a first connecting hole and a second connecting hole, and the cylinder connecting hole of the cylinder body 200 includes a third connecting hole and a fourth connecting hole.

[0076] Referring to Figure 3 , the first connecting hole and the second connecting hole are arranged on the cylinder wall of the connecting end of the quick-connect base 100 with the cylinder center of the connecting end of the quick-connect base 100 as the center and at a preset connecting hole included angle. Referring to Figure 4 , the third connecting hole and the fourth connecting hole are arranged on the cylinder wall of the connecting end of the cylinder body 200 with the cylinder center of the connecting end of the cylinder body 200 as the center and at the same connecting hole included angle. Therefore, referring to Figure 5 , when the connecting end of the quick-connect base 100 is sleeved outside the connecting end of the cylinder body 200, the first connecting hole can be aligned with the third connecting hole, and the second connecting hole can be aligned with the fourth connecting hole. It can be understood that the preset connecting hole included angle can be adaptively adjusted according to actual connecting hole setting requirements.

[0077] The base connecting end sleeve is connected to the outside of the cylinder body 200 connecting end, and when the first connecting hole is aligned with the third connecting hole, and the second connecting hole is aligned with the fourth connecting hole, the first connecting hole and the third connecting hole can be detachably connected by screws, and the second connecting hole and the fourth connecting hole can be detachably connected by screws.

[0078] It can be seen that the optional embodiment can also be configured by the base connecting hole as the first connecting hole and the second connecting hole, and the cylinder connecting hole as the third connecting hole and the fourth connecting hole, and the first connecting hole and the second connecting hole are arranged at the same angle, and the third connecting hole and the fourth connecting hole are arranged at the same angle, which further improves the stability of the connection between the quick-connecting base 100 and the cylinder body 200.

[0079] As shown in Figure 6 In an optional embodiment, the on-off device 300 includes a plug rod assembly 310, an on-off assembly 320, and a resilient member 330. The plug rod assembly 310 is arranged at one end of the air pressure cavity close to the air inlet, the sealing end of the plug rod assembly 310 is arranged towards the air inlet, the piston end of the plug rod assembly 310 is arranged away from the air inlet, the piston end of the plug rod assembly 310 has a piston through hole, and the piston end of the plug rod assembly 310 is provided with a piston through hole in the vertical direction of the radial direction of the air pressure cavity; the on-off assembly 320 is arranged at one end of the air pressure cavity away from the air inlet, the on-off assembly 320 is provided with a piston cavity in the radial direction of the air pressure cavity, the on-off assembly 320 is provided with a fluid through hole in the vertical direction of the radial direction of the piston cavity, the fluid through hole is in communication with the piston cavity, and the piston end of the plug rod assembly 310 is in contact with the inner wall of the piston cavity; the resilient member 330 is arranged between the plug rod assembly 310 and the on-off assembly 320 in the air pressure cavity; wherein the air supply device is used to air into the air pressure cavity through the air inlet to drive the sealing end of the plug rod assembly 310 to compress the resilient member 330 in the direction away from the air inlet, and to push the piston end of the plug rod assembly 310 in the direction away from the air inlet, so that the piston end of the plug rod assembly 310 blocks the communication of the fluid through hole; the resilient member 330 is used to push the piston end of the plug rod assembly 310 towards the air inlet when the air supply device is not air, so that the fluid through hole is communicated through the piston through hole.

[0080] In this optional embodiment, referring to Figure 5The plug rod assembly 310 is arranged at one end close to the bottom of the air pressure cavity, the bottom of the plug rod assembly 310 is a sealed end, the bottom surface of the sealed end is arranged towards the air inlet, the top of the plug rod assembly 310 is a piston end, and the piston end of the plug rod assembly 310 is provided with a piston through hole in the left-right transverse direction. The on-off assembly 320 is arranged at one end close to the top of the air pressure cavity, the on-off assembly 320 is provided with a piston cavity in the up-down vertical direction and a fluid through hole in the left-right transverse direction, the fluid through hole is divided into a left side through hole and a right side through hole, the left and right side through holes of the fluid through hole are both in communication with the piston cavity in the middle, and the piston end of the plug rod assembly 310 can be arranged in the piston cavity and in contact with the inner wall of the piston cavity.

[0081] The rebounding piece 330 is arranged between the plug rod assembly 310 and the on-off assembly 320. When the air supply device ventilates the air pressure cavity in the air cylinder body 200 through the air inlet of the air cylinder body 200, the plug rod assembly 310 is driven to move upward by the air pressure, so that the rebounding piece 330 is compressed upward by the plug rod assembly 310, and the piston end of the plug rod assembly 310 is driven to move upward in the piston cavity, so that the piston through hole on the piston end of the plug rod assembly 310 is out of position with the fluid through hole of the on-off assembly 320, that is, the piston end of the plug rod assembly 310 blocks the communication between the left side through hole and the right side through hole of the fluid through hole, and the sand powder fluid cannot flow through the fluid through hole. After the air supply device stops ventilating the air pressure cavity in the air cylinder body 200, the rebounding piece 330 rebounds under the influence of the elastic potential energy after compression, so as to push the plug rod assembly 310 downward, so that the piston through hole on the piston end of the plug rod assembly 310 is aligned with the fluid through hole of the on-off assembly 320, that is, the left side through hole and the right side through hole of the fluid through hole are communicated through the piston through hole of the plug rod assembly 310, and at this time, the sand powder fluid can flow through the fluid through hole.

[0082] It can be seen that the optional embodiment can control the movement of the plug rod assembly 310 through the air supply device and the rebounding piece 330, so as to control the on-off of the fluid through hole of the on-off assembly 320, thereby realizing the on-off control of the sand powder fluid.

[0083] As Figure 6As shown, in one optional embodiment, the plug rod assembly 310 comprises a plug rod base 311, a plug rod body 312 and a sealing sheet 313. The plug rod base 311 is arranged in the air pressure cavity near the air inlet end, and the circumference of the plug rod base 311 is in contact with the inner wall of the air pressure cavity to seal the air pressure cavity; the plug rod body 312 is connected to the side of the plug rod base 311 away from the air inlet, and the plug rod body 312 has a fixed through cavity, and the plug rod body 312 is arranged in the piston cavity; wherein the rebounding piece 330 is sleeved on the plug rod body 312, the end of the rebounding piece 330 near the air inlet is in contact with the side of the plug rod base 311 away from the air inlet, and the end of the rebounding piece 330 away from the air inlet is in contact with the side of the on-off assembly 320 near the air inlet; the sealing sheet 313 has a piston through hole, and the sealing sheet 313 is arranged in the fixed through cavity, and the opposite two sides of the sealing sheet 313 are in contact with the inner wall of the piston cavity, respectively; wherein the air supply device is used to air through the air inlet into the air pressure cavity, to drive the plug rod base 311 to compress the rebounding piece 330 in the direction away from the air inlet, and to drive the plug rod body 312 and the sealing sheet 313 to move in the direction away from the air inlet, so that the sealing sheet 313 blocks the communication of the fluid through hole; the rebounding piece 330 is used to drive the plug rod base 311 to move towards the air inlet, to drive the plug rod body 312 and the sealing sheet 313 to move towards the air inlet, so that the fluid through hole is communicated through the piston through hole.

[0084] In this optional embodiment, referring to Figure 6 , the plug rod base 311 is arranged in the air pressure cavity near the bottom end, and the plug rod base 311 is the sealing end of the plug rod assembly 310, and the bottom surface of the plug rod base 311 is the bottom surface of the sealing end of the plug rod assembly 310.

[0085] The plug rod body 312 is arranged on and connected to the upper side of the plug rod base 311, and the plug rod body 312 is a frame type limiting device, and the middle part of the plug rod body 312 has a fixed through cavity, and the fixed through cavity is in communication with the outside of the plug rod body 312 through the left and right sides. The plug rod body 312 fixes the sealing sheet 313 in the fixed through cavity of the plug rod body 312, that is, the plug rod body 312 and the sealing sheet 313 constitute the piston end of the plug rod assembly 310. Wherein, the left and right two sides of the sealing sheet 313 are in contact with the inner surface of the piston cavity of the on-off assembly 320, and the piston through hole is arranged on the sealing sheet 313 and is in communication with the left and right sides.

[0086] The rebounding piece 330 is sleeved on the plug rod body 312, the lower end of the rebounding piece 330 is in contact with the upper side of the plug rod base 311, and the upper end of the rebounding piece 330 is in contact with the lower side of the on-off assembly 320.

[0087] It can be seen that the optional embodiment can also fix the sealing sheet 313 in the fixed cavity of the plug rod body 312 by the plug rod body 312, so that the sealing sheet 313 will not be separated from the piston cavity when moving up and down in the piston cavity due to the limiting, thereby ensuring the reliability of the fluid on-off structure in controlling the fluid on-off.

[0088] As shown in Figure 6 , in an optional embodiment, the on-off assembly 320 comprises an outer housing 321, a first sealing member 322 and a second sealing member 323. The outer housing 321 is arranged at one end of the air pressure cavity away from the air inlet, the outer housing 321 is provided with a piston cavity in the radial direction of the air pressure cavity, the outer housing 321 is provided with a fluid through hole in the vertical direction of the radial direction of the air pressure cavity, the fluid through hole is communicated with the piston cavity; the first sealing member 322 is arranged on the first inner surface of the piston cavity, the first sealing member 322 is provided with a first through hole in the vertical direction of the radial direction of the air pressure cavity, the first through hole is communicated with the piston cavity; the second sealing member 323 is arranged on the second inner surface of the piston cavity, the second sealing member 323 is provided with a second through hole in the vertical direction of the radial direction of the air pressure cavity, the second through hole is communicated with the piston cavity; wherein the first inner surface and the second inner surface are two opposite inner surfaces of the piston cavity, the sealing surface of the first sealing member 322 and the sealing surface of the second sealing member 323 are oppositely arranged, the opposite two side surfaces of the sealing sheet 313 are respectively in contact with the sealing surface of the first sealing member 322 and the sealing surface of the second sealing member 323, and the first through hole and the second through hole are oppositely arranged.

[0089] In this optional embodiment, referring to Figure 6 , the outer housing 321 has an up-down longitudinal piston cavity, the upper end and the lower end of the piston cavity are communicated with the outside of the outer housing 321. The left and right inner walls of the outer housing 321 are respectively the first inner surface and the second inner surface of the piston cavity, that is, the first inner surface and the second inner surface of the piston cavity are two opposite inner surfaces of the piston cavity.

[0090] The first sealing member 322 is arranged on the first inner surface of the piston cavity, and the sealing surface of the first sealing member 322 is the right side surface of the first sealing member 322. The second sealing member 323 is arranged on the second inner surface of the piston cavity, and the sealing surface of the second sealing member 323 is the left side surface of the second sealing member 323. The first through hole of the first sealing member 322 and the second through hole of the second sealing member 323 are correspondingly arranged in the left-right transverse direction. The left side surface of the sealing sheet 313 is in contact with the sealing surface of the first sealing member 322, and the right side surface of the sealing sheet 313 is in contact with the sealing surface of the second sealing member 323.

[0091] When the piston through hole on the sealing sheet 313 is misaligned with the first through hole of the first sealing member 322 and the second through hole of the second sealing member 323, the sealing sheet 313 will block the communication between the first through hole and the second through hole, and the sand powder fluid cannot flow from the first through hole to the second through hole or from the second through hole to the first through hole. When the piston through hole on the sealing sheet 313 is aligned with the first through hole of the first sealing member 322 and the second through hole of the second sealing member 323, that is, the first through hole and the second through hole can be communicated through the piston through hole of the sealing sheet 313, at this time, the sand powder fluid can flow through the first through hole, the piston through hole and the second through hole.

[0092] It can be seen that the optional embodiment can also make the sealing sheet 313 seal with the first sealing member 322 and the second sealing member 323 respectively when the sealing sheet 313 blocks the communication between the first through hole and the second through hole by combining the first sealing member 322 and the second sealing member 323 with the sealing sheet 313, so as to ensure that the fluid on-off structure can accurately shut off the flow of the sand powder fluid.

[0093] As shown in Figure 6 , in an optional embodiment, the outer shell 321 includes a first base 3211 and a second base 3212. The first base 3211 has a third through hole, and the connecting side of the first base 3211 is provided with a first piston groove, and the inner surface of the first piston groove is provided with a first fixing groove, the first piston groove and the first fixing groove are communicated, the third through hole and the first fixing groove are communicated, the first sealing member 322 is arranged in the first fixing groove, and the first through hole of the first sealing member 322 is arranged opposite to the third through hole of the first base 3211; the second base 3212 has a fourth through hole, and the connecting side of the second base 3212 is provided with a second piston groove, and the inner surface of the second piston groove is provided with a second fixing groove, the second piston groove and the second fixing groove are communicated, the fourth through hole and the second fixing groove are communicated, the second sealing member 323 is arranged in the second fixing groove, and the second through hole of the second sealing member 323 is arranged opposite to the fourth through hole of the second base 3212; wherein, the connecting side of the first base 3211 is arranged opposite to the connecting side of the second base 3212, and the connecting side of the first base 3211 is connected with the connecting side of the second base 3212, so as to form a piston cavity with the first piston groove and the second piston groove.

[0094] In this optional embodiment, referring to Figure 6 , the outer shell 321 can be divided into the first base 3211 on the left half and the second base 3212 on the right half.

[0095] The connecting side of the first base 3211 is located on the right side surface of the first base 3211, and the connecting side of the first base 3211 is provided with a first piston groove, and the inner surface of the first piston groove is the first inner surface of the piston cavity. The connecting side of the second base 3212 is located on the left side surface of the second base 3212, and the connecting side of the second base 3212 is provided with a second piston groove, and the inner surface of the second piston groove is the second inner surface of the piston cavity.

[0096] The inner surface of the first piston groove is provided with a first fixing groove, and the first sealing piece 322 is arranged in the first fixing groove, so that the first fixing groove can fix the first sealing piece 322. The inner surface of the second piston groove is provided with a second fixing groove, and the second sealing piece 323 is arranged in the second fixing groove, so that the second fixing groove can fix the second sealing piece 323.

[0097] Further, the sealing surface of the first sealing piece 322 is flush with the inner surface of the first piston groove, and the sealing surface of the second sealing piece 323 is flush with the inner surface of the second piston groove, so that the sealing sheet 313 can move up and down in the first piston groove and the second piston groove, and the first sealing piece 322 can contact the sealing sheet 313 through the sealing surface thereof, and the second sealing piece 323 can contact the sealing sheet 313 through the sealing surface thereof.

[0098] The connecting side of the first base 3211 is connected with the connecting side of the second base 3212, so that the first piston groove of the first base 3211 and the second piston groove of the second base 3212 form the piston cavity, that is, the plug rod body 312 and the sealing sheet 313 can move up and down in the first piston groove and the second piston groove. It can be understood that the shape of the first piston groove and the shape of the second piston groove can be referred to the description of the cavity shape of the piston cavity, that is, the shape of the first piston groove and the shape of the second piston groove are determined by the shape of the sealing sheet 313.

[0099] Further, the first base 3211 is also provided with a third through hole, and the third through hole of the first base 3211 is oppositely arranged and communicated with the first through hole of the first sealing piece 322. The second base 3212 is also provided with a fourth through hole, and the fourth through hole of the second base 3212 is oppositely arranged and communicated with the second through hole of the second sealing piece 323.

[0100] It can be seen that the optional embodiment can also fix the first sealing piece 322 through the first fixing groove of the first base 3211, and fix the second sealing piece 323 through the second fixing groove of the second base 3212, so that the first sealing piece 322 and the second sealing piece 323 will not be separated when moving up and down on the sealing sheet 313 due to the limiting, thereby ensuring the reliability of the fluid on-off structure in controlling the fluid on-off.

[0101] As Figure 6As shown, in an optional embodiment, the fluid on-off structure further comprises: a first fluid guide connector 400 and a second fluid guide connector 500. The first fluid guide connector 400 is arranged at the third through hole of the first base 3211, and the interface of the first fluid guide connector 400 is in communication with the third through hole of the first base 3211 and the first through hole of the first sealing member 322 respectively; the second fluid guide connector 500 is arranged at the fourth through hole of the second base 3212, and the interface of the second fluid guide connector 500 is in communication with the fourth through hole of the second base 3212 and the second through hole of the second sealing member 323 respectively.

[0102] In this optional embodiment, the first fluid guide connector 400 is connected with the third through hole of the first base 3211, so that the interface of the first fluid guide connector 400 is in communication with the third through hole of the first base 3211 and the first through hole of the first sealing member 322 respectively. The second fluid guide connector 500 is connected with the fourth through hole of the second base 3212, so that the interface of the second fluid guide connector 500 is in communication with the fourth through hole of the second base 3212 and the second through hole of the second sealing member 323 respectively. The first fluid guide connector 400 and the second fluid guide connector 500 can be connected with external fluid guide pipes, so that the sand powder fluid conveyed by the fluid guide pipes can be introduced into and discharged from the fluid on-off structure.

[0103] It can be seen that, in this optional embodiment, the sand blasting fluid which needs to be controlled to be turned on and off can also be introduced into and discharged from the first fluid guide connector 400 and the second fluid guide connector 500, so that the sand blasting fluid can not overflow when being conveyed to the fluid on-off structure and discharged from the fluid on-off structure, thereby improving the stability of the sand blasting fluid conveying.

[0104] The utility model discloses still a kind of dental sand blasting equipment, it includes piston controller, sand blasting fluid guide pipe body and the cylinder control fluid on-off structure described in the above embodiment of the utility model. Gas supply device is connected with the air inlet of cylinder body 200, and gas supply device is used to ventilate into air pressure cavity by air inlet;Sand blasting fluid guide pipe body is connected with on-off device 300.

[0105] In the embodiment, the sand blasting fluid guide pipe body has front section pipe body and rear section pipe body, and the front section pipe body of the sand blasting fluid guide pipe body is connected with the first fluid guide connector 400 to realize communication with the third through hole of the first base 3211 and the first through hole of the first sealing member 322, and the rear section pipe body is connected with the second fluid guide connector 500 to realize communication with the fourth through hole of the second base 3212 and the second through hole of the second sealing member 323.

[0106] The air supply device is connected with the air inlet of the cylinder body 200, and the air supply device can control the vertical movement of the sealing sheet 313 in the piston cavity formed by the first piston groove and the second piston groove by pressurizing the air pressure cavity of the cylinder body 200. The sandblasting guide pipe body can transport sandblasting fluid, when the piston through hole of the sealing sheet 313 is aligned with the first through hole and the second through hole, the first through hole and the second through hole can be communicated through the piston through hole, and the sandblasting fluid transported by the front pipe body can flow through the first through hole, the piston through hole and the second through hole, and then be transported to the rear pipe body; when the piston through hole of the sealing sheet 313 is not aligned with the first through hole and the second through hole, the non-through hole part of the sealing sheet 313 can block the communication between the first through hole and the second through hole, and the sandblasting fluid transported by the front pipe body cannot be transported to the rear pipe body.

[0107] It can be seen that, in the embodiment, the dental sandblasting equipment adopts the above-mentioned air cylinder control fluid on-off structure, and the first connecting part of the quick-connection base 100 is detachably connected with the second connecting part of the cylinder body 200, so that when maintenance is needed, the fluid on-off structure can be quickly detached from the quick-connection base 100 and the cylinder body 200, so as to maintain and repair each component of the fluid on-off structure, thereby improving the efficiency of maintaining and repairing each component of the fluid on-off structure, and achieving the effect of quick maintenance and repair.

[0108] The technical means disclosed in the utility model scheme is not only limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A cylinder control fluid on-off structure characterized by comprising: The structure includes: A quick-connect base, which is connected to an external air supply device, has a first connecting part and an air duct at the connecting end of the quick-connect base; The cylinder body has a pressure chamber inside. The connecting end of the cylinder body has a second connecting part and an air inlet. The air inlet communicates with the pressure chamber. The second connecting part of the cylinder body is detachably connected to the first connecting part of the quick-connect base. The air inlet of the cylinder body is opposite to the air guide port of the quick-connect base. An on / off device is disposed in the pneumatic chamber; The air supply device is used to supply air to the air pressure chamber through the air inlet and the air outlet to switch the on / off state of the on / off device.

2. The cylinder-controlled fluid on / off structure according to claim 1, characterized in that, The first connecting part includes a base connecting hole, and the second connecting part includes a cylinder connecting hole. The base connecting hole and the cylinder connecting hole are detachably connected by screws.

3. The cylinder-controlled fluid on / off structure according to claim 2, characterized in that, Both the connecting end of the quick-connect base and the connecting end of the cylinder body are cylindrical structures. The cylindrical radius of the connecting end of the quick-connect base is larger than that of the connecting end of the cylinder body, so that the connecting end of the quick-connect base can be fitted onto the outside of the connecting end of the cylinder body.

4. The cylinder-controlled fluid on / off structure according to claim 3, characterized in that, The base connection hole includes a first connection hole and a second connection hole. The first connection hole and the second connection hole are set on the cylindrical wall of the connecting end of the quick-connect base with the center of the cylinder as the center and with a preset connection hole angle. The cylinder connection hole includes a third connection hole and a fourth connection hole. The third connection hole and the fourth connection hole are set on the cylindrical wall of the connecting end of the cylinder body with the center of the cylinder as the center and with the connection hole angle. The first connecting hole and the third connecting hole are detachably connected by screws, and the second connecting hole and the fourth connecting hole are detachably connected by screws.

5. The cylinder-controlled fluid on / off structure according to any one of claims 1 to 4, characterized in that, The switching device includes: A piston rod assembly is disposed in the pneumatic chamber at one end near the air inlet. The sealing end of the piston rod assembly faces the air inlet, and the piston end of the piston rod assembly is disposed away from the air inlet. The piston end of the piston rod assembly has a piston through hole, and the piston end of the piston rod assembly is provided with a piston through hole in the radial direction perpendicular to the pneumatic chamber. A switching assembly is provided at one end of the pressure chamber away from the air inlet. The switching assembly has a piston cavity in the radial direction of the pressure chamber and a fluid through hole in the radial direction perpendicular to the piston cavity. The fluid through hole communicates with the piston cavity, and the piston end of the piston rod assembly contacts the inner wall of the piston cavity. A spring-loaded component is disposed between the plug rod assembly and the on / off assembly in the pneumatic chamber; The air supply device is used to supply air into the air pressure chamber through the air inlet, thereby driving the sealing end of the plug rod assembly to compress the spring member in a direction away from the air inlet, and pushing the piston end of the plug rod assembly in a direction away from the air inlet, so that the piston end of the plug rod assembly blocks the flow of the fluid passage; the spring member is used to push the piston end of the plug rod assembly towards the air inlet when the air supply device is not supplying air, so that the fluid passage is connected through the piston passage.

6. The cylinder-controlled fluid on / off structure according to claim 5, characterized in that, The piston rod assembly includes: A stopper rod base is disposed at one end of the air pressure chamber near the air inlet, and the circumferential direction of the stopper rod base contacts the inner wall of the air pressure chamber to seal the air pressure chamber; A piston rod body is connected to the piston rod base on the side away from the air inlet. The piston rod body has a fixed through cavity and is disposed in the piston cavity. A spring-loaded member is sleeved on the piston rod body. One end of the spring-loaded member near the air inlet contacts the side of the piston rod base away from the air inlet, and the other end of the spring-loaded member away from the air inlet contacts the side of the on / off assembly near the air inlet. A sealing sheet having a piston through hole is disposed in the fixed through cavity, and two opposite sides of the sealing sheet respectively contact the inner wall of the piston cavity; The air supply device is used to supply air into the air pressure chamber through the air inlet, thereby driving the piston rod base to compress the spring member in a direction away from the air inlet, and pushing the piston rod body and the sealing plate in a direction away from the air inlet, so that the sealing plate blocks the flow of the fluid passage; the spring member is used to push the piston rod base towards the air inlet, thereby driving the piston rod body and the sealing plate towards the air inlet, so that the fluid passage is connected through the piston passage.

7. The cylinder-controlled fluid on / off structure according to claim 6, characterized in that, The on / off component includes: The outer casing is disposed at one end of the air pressure chamber away from the air inlet. The outer casing has a piston cavity in the radial direction of the air pressure chamber and a fluid passage in the direction perpendicular to the radial direction of the air pressure chamber. The fluid passage communicates with the piston cavity. A first sealing element is disposed on a first inner surface of the piston cavity. The first sealing element has a first through hole in the radial direction perpendicular to the air pressure cavity, and the first through hole communicates with the piston cavity. The second sealing element is disposed on the second inner surface of the piston cavity, and the second sealing element has a second through hole in the radial direction perpendicular to the air pressure cavity, and the second through hole communicates with the piston cavity. Wherein, the first inner surface and the second inner surface are two inner surfaces opposite to the piston cavity, the sealing surfaces of the first seal and the second seal are arranged opposite to each other, the two opposite sides of the sealing sheet are in contact with the sealing surfaces of the first seal and the second seal respectively, and the first through hole and the second through hole are arranged opposite to each other.

8. The cylinder-controlled fluid on / off structure according to claim 7, characterized in that, The outer casing includes: A first base has a third through hole, a first piston groove is provided on the connecting side of the first base, a first fixing groove is provided on the inner surface of the first piston groove, the first piston groove communicates with the first fixing groove, the third through hole communicates with the first fixing groove, the first sealing member is disposed in the first fixing groove, and the first through hole of the first sealing member is disposed opposite to the third through hole of the first base. The second base has a fourth through hole, a second piston groove is provided on the connecting side of the second base, a second fixing groove is provided on the inner surface of the second piston groove, the second piston groove communicates with the second fixing groove, the fourth through hole communicates with the second fixing groove, the second sealing member is disposed in the second fixing groove, and the second through hole of the second sealing member is disposed opposite to the fourth through hole of the second base; The connecting side of the first base is disposed opposite to the connecting side of the second base, and the connecting side of the first base is connected to the connecting side of the second base, so that the first piston groove and the second piston groove form the piston cavity.

9. The cylinder-controlled fluid on / off structure according to claim 8, characterized in that, The structure also includes: The first flow guide connector is disposed at the third through hole of the first base, and the interface of the first flow guide connector is connected to the third through hole of the first base and the first through hole of the first seal respectively. The second flow guide is disposed at the fourth through hole of the second base, and the interface of the second flow guide is connected to the fourth through hole of the second base and the second through hole of the first seal respectively.

10. A dental air polishing device, characterized in that, The device includes: The cylinder-controlled fluid on / off structure as described in any one of claims 1 to 9; An air supply device is connected to the air inlet of the cylinder block, and the air supply device is used to supply air to the air pressure chamber through the air inlet. A sandblasting guide pipe body, which is connected to the on / off device.

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