Water and gas circuit integrated control valve used on dental treatment table

Abstract

A water and gas circuit integrated control valve used on a dental treatment table comprises a valve body, at least one fluid passage is arranged in the valve body, and the fluid passage comprises a fluid inlet hole, a mounting channel and a fluid outlet hole; a valve element device inserted from the mounting opening is arranged in the mounting channel, the valve element device comprises a valve element seat with a valve element channel and a piston valve rod with a piston head and a valve rod body, the valve element channel is communicated with the fluid outlet hole, and the piston valve rod is arranged in the valve element channel in a sliding fit mode; the piston head and the valve core channel form a pneumatic control cavity; a valve cover which covers the mounting port and limits and fixes the valve core seat in the mounting channel is mounted on the valve body; and a control air hole communicated with the air control cavity is formed in the valve cover. According to the utility model, the production of machining scraps is effectively reduced, the machining time of the control valve is shortened, and the purpose of reducing the production cost of the control valve is achieved.

Description

Technical Field

[0001] This utility model relates to the field of dental equipment technology, specifically to an integrated water and air control valve for use on a dental treatment table. Background Technology

[0002] The control valve is a device for controlling the water and air circuits of a dental treatment unit. Some existing dental control valves are piston-type control valves, such as the water and air control main valve disclosed in patent application CN 203656271U. This valve includes a valve body with at least one fluid passage. Each fluid passage includes a first chamber and a second chamber. A valve core is disposed in the second chamber, and sealing rings are provided at both ends of the valve core to fit against the inner wall of the second chamber. A first air outlet is disposed between the sealing rings at both ends of the valve core, communicating with the second chamber. The second chamber is connected to a control air inlet. This technical solution can control and switch multiple airflows or water flows, meeting the water and air circuit control requirements of dental treatment.

[0003] However, in this technical solution, in order to prevent the sealing ring from rubbing against the walls of the first and second cavities during valve core operation, the fluid passage inside the valve body usually needs to be machined to ensure the smoothness of the first cavity and its inner wall. The large space of the first and second cavities results in a lot of machining waste during the machining process of the first and second cavities, and it is also not conducive to the overall one-piece molding of the valve body, thus increasing production costs. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides an integrated water and air control valve for use on a dental treatment table.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An integrated water and air control valve for a dental treatment table includes a valve body with at least one fluid passage, the fluid passage including a fluid inlet, an installation channel, and a fluid outlet; one end of the installation channel is an installation port penetrating the valve body. The valve body is characterized by having a valve core device inserted into the installation port within the installation channel, the valve core device including a valve core seat with a valve core channel and a piston valve rod with a piston head and a valve rod body; the valve core channel communicating with the fluid outlet; and the piston valve rod slidably engaging within the valve core channel; the piston head and the valve core channel forming an air control chamber; and the valve rod body configured to control the connection between the valve core channel inlet and the fluid inlet; a valve cover mounted on the valve body, covering the installation port and fixing the valve core seat within the installation channel, the valve cover having a control air port communicating with the air control chamber.

[0007] In this utility model, the valve core channel includes a pneumatic control section, a valve core section, and a valve core connecting hole disposed within the valve core seat, as well as a valve core groove disposed outside the valve core seat. The upper end of the pneumatic control section penetrates the top of the valve core seat; the upper end of the valve core section connects to the pneumatic control section, and the lower end penetrates the bottom of the valve core seat; the two ends of the valve core connecting hole connect the valve core section and the valve core groove, respectively; the piston head is disposed within the pneumatic control section, and the upper part of the piston head and the pneumatic control section form the pneumatic control cavity; the valve stem body is movably inserted into the valve core section.

[0008] In this invention, the piston head is fitted with a piston sealing ring that slides and seals against the wall of the pneumatic control section, and the valve stem body is fitted with an upper sealing ring and a lower sealing ring that slides and seals against the valve core section from top to bottom.

[0009] In this invention, the pneumatic control section of the valve core channel is provided with a reset spring for driving the piston rod to reset so that the valve core channel inlet is disconnected from the fluid inlet. One end of the reset spring is in contact with the piston head, and the other end is abutted against the bottom surface of the pneumatic control section.

[0010] In this utility model, the installation channel includes a large-diameter section and a small-diameter section connected sequentially along the axial direction. The connection between the small-diameter section and the large-diameter section has an installation limiting surface. The valve core seat includes an upper valve core section and a lower valve core section connected sequentially along the axial direction. The upper valve core section is adapted to be installed in the large-diameter section and its bottom abuts against the installation limiting surface. The lower valve core section is adapted to be installed in the upper part of the small-diameter section.

[0011] In this utility model, an upper mounting sealing ring is connected between the bottom surface of the valve cover and the upper end of the upper section of the valve core, and a lower mounting sealing ring is fitted on the outer periphery of the lower section of the valve core to seal against the wall surface of the small diameter section.

[0012] In this utility model, the fluid outlet is fitted with a mating connector, the plug end of the mating connector is inserted into the fluid outlet, and the valve body is equipped with a snap-fit ​​fastener for mounting the mating connector. The mating connector is provided with a mating groove for the snap-fit ​​fastener to be snapped into.

[0013] In this invention, a plug-in sealing ring is fitted on the plug end of the mating connector, and the plug-in sealing ring on the mating connector is used to seal with the wall of the fluid outlet (hole).

[0014] In this utility model, the installation channel is connected to at least one diversion hole, and the diversion hole is correspondingly fitted with a separation fitting head. The plug end of the diversion fitting head is inserted into the diversion hole. The valve body is equipped with a snap-fit ​​component for snapping on the diversion fitting head, and each diversion fitting head is provided with a fitting groove for the snap-fit ​​component to be snapped into.

[0015] In this invention, a plug-in sealing ring is fitted on the plug end of the flow divider head, and the plug-in sealing ring on the flow divider head is used to seal with the flow divider hole.

[0016] The beneficial effects of this utility model are as follows: The valve core device of this utility model includes a valve core seat and a piston valve rod. The piston valve rod is installed through the valve core channel of the valve core seat. Compared with the prior art, only the valve core channel needs to be machined, thereby reducing the area of ​​the control valve that needs to be machined, effectively reducing the generation of machining waste and shortening the machining time, thus achieving the goal of reducing the production cost of the control valve. Moreover, this design structure is also conducive to the production of the valve body and valve core seat by injection molding or casting integral molding process, thereby further reducing the production cost of the control valve. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 Schematic diagram of valve core assembly installation Figure 1 ;

[0019] Figure 2 This is an exploded view of the valve core assembly;

[0020] Figure 3 Installation diagram of valve core device Figure 2 ;

[0021] Figure 4 A schematic diagram of installing a flow divider fitting head on a flow divider orifice;

[0022] Figure 5 Three-dimensional integrated control valve for water and gas circuits Figure 1 ;

[0023] Figure 6 Three-dimensional integrated control valve for water and gas circuits Figure 2 ;

[0024] Figure 7 Exploded view of some parts of the integrated control valve for water and gas circuits. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection using welding, a detachable connection using bolts, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Reference Figure 1-7 A water and air integrated control valve for use on a dental treatment table includes a valve body 1, which is manufactured by injection molding or casting. The valve body 1 has at least one fluid passage, which includes a fluid inlet 101, an installation channel 102 and a fluid outlet 103.

[0030] Furthermore, one end of the mounting channel 102 is a mounting port that penetrates the valve body 1. The mounting channel 102 is provided with a valve core device that is inserted through the mounting port. The valve core device includes a valve core seat 2 with a valve core channel and a piston valve rod 3 with a piston head 31 and a valve rod body 32. The valve core channel is connected to the fluid outlet 103. The piston valve rod 3 is slidably fitted in the valve core channel. The piston head 31 and the valve rod body 32 are connected sequentially along the axial direction. The piston head 31 of the piston valve rod 3 and the valve core channel form a pneumatic control chamber. The valve rod body 32 is configured to control the opening and closing between the valve core channel inlet and the fluid inlet 101.

[0031] Furthermore, a valve cover 4 is installed on the valve body 1, covering the mounting port and fixing the valve core seat 2 in the mounting channel 102. The valve cover 4 is fixed to the top of the valve body 1 by a cover mounting screw 402. The valve cover 4 is provided with a control air hole 41 that communicates with the pneumatic control chamber. The control air hole 41 is a control threaded hole, and a control air pipe connector 10 is threadedly installed on the control air hole 41.

[0032] The valve core device of this utility model includes a valve core seat 2 and a piston valve rod 3. The piston valve rod 3 is installed through the valve core channel of the valve core seat 2. Compared with the prior art, only the valve core channel needs to be machined, thereby reducing the area of ​​the control valve that needs to be machined, effectively reducing the generation of machining waste and shortening the machining time, thus achieving the goal of reducing the production cost of the control valve. Moreover, this design structure also facilitates the production of the valve body 1 and the valve core seat 2 through an injection molding process, thereby further reducing the production cost of the control valve.

[0033] In this embodiment, the valve core channel includes a pneumatic control section 21, a valve core section 22, and a valve core connecting hole 23 disposed within the valve core seat 2, and a valve core groove 24 disposed outside the valve core seat 2. The upper end of the pneumatic control section 21 penetrates the top of the valve core seat 2; the upper end of the valve core section 22 connects to the pneumatic control section 21, and the lower end penetrates the bottom of the valve core seat 2; the valve core groove 24 is an annular groove surrounding the outer periphery of the valve core seat 2; multiple valve core connecting holes 23 are distributed circumferentially along the valve core groove 24, and the two ends of each valve core connecting hole 23 connect the valve core section 22 and the valve core groove 24, respectively; the piston head 31 is disposed within the pneumatic control section 21, and the upper part of the piston head 31 and the pneumatic control section 21 of the valve core channel form the pneumatic control cavity; a piston sealing ring 301 is fitted around the outer periphery of the piston head 31, which slides and seals against the wall of the pneumatic control section 21; the valve stem 32 is movably inserted into the valve core section 22.

[0034] In this embodiment, the valve stem body 32 is fitted with an upper sealing ring 302 and a lower sealing ring 303 from top to bottom on its outer surface for sliding contact and sealing with the valve core section 22. The valve stem body 32 has a valve stem annular groove 321 located between the upper sealing ring 302 and the lower sealing ring 303 on its outer circumferential surface. When the valve core channel inlet is connected to the fluid inlet hole 101, the valve stem annular groove 321 allows the fluid entering from the valve core section 22 to flow quickly to the valve core connecting hole 23, thereby preserving fluid flow efficiency.

[0035] In this embodiment, the pneumatic control section 21 is provided with a reset spring 5 for driving the piston rod to reset so that the valve core channel inlet is disconnected from the fluid inlet 101; further, the reset spring 5 is fitted on the valve rod 32, one end of the reset spring 5 is in contact with the piston head 31, and the other end is abutting against the bottom surface of the pneumatic control section 21.

[0036] In this embodiment, the installation channel 102 includes a large-diameter section and a small-diameter section connected sequentially along the axial direction. The connection between the small-diameter section and the large-diameter section has an installation limiting surface. The valve core seat 2 includes an upper valve core section 25 and a lower valve core section 26 connected sequentially along the axial direction. The upper valve core section 25 is adapted to be installed in the large-diameter section and its bottom abuts against the installation limiting surface. The lower valve core section 26 is adapted to be installed in the upper part of the small-diameter section. An upper installation sealing ring 201 is connected between the bottom surface of the valve cover 4 and the upper end of the upper valve core section 25. A lower installation sealing ring 202 is fitted on the outer periphery of the lower valve core section 26 to contact and seal with the wall surface of the small-diameter section.

[0037] In this embodiment, the fluid outlet 103 is fitted with a mating connector 6, the plug end of which is inserted into the fluid outlet 103, and the mating connector 6 is used to connect a pipe.

[0038] In this embodiment, the small-diameter section of the installation channel 102 is connected to at least one diversion hole 104. A corresponding separation fitting head is fitted to each diversion hole 104, and the insertion end of the diversion fitting head is inserted into the diversion hole 104. Further, the diversion fitting head is either a diversion pipe connector 71 for connecting to a pipeline or a diversion plug 72 for blocking the diversion hole 104. Fluid flowing in through the fluid inlet 101 can flow directly from the installation channel 102 to the diversion hole 104, and then from the diversion pipe connector 71 and through a pipeline to other devices requiring fluid, thereby enabling the control valve to have a multi-way diversion function.

[0039] In this embodiment, the valve body 1 is equipped with a snap-fit ​​element 8 for snapping on the mating connector 6 and the flow divider mating head. Both the mating connector 6 and the flow divider mating head are provided with mating slots 800 for the snap-fit ​​element 8 to be snapped into.

[0040] Furthermore, the fastener 8 is U-shaped, comprising a fastener body 81 and fastener side pieces 82 located at the left and right ends of the fastener body 81. The fastener body 81 and / or the fastener side pieces 82 are provided with sliding fastening holes 83 for partially engaging the fastener 8 into the mating groove 800. The sliding fastening holes 83 include through-holes 831 and snap-fit ​​holes 832 for partially inserting the fastener 8 into the mating groove 800. The insertion clearance hole 831 is connected to the snap-fit ​​hole 832. The diameter of the insertion end of the mating connector 6 and the diverting mating head is smaller than the diameter of the insertion clearance hole 831 and larger than the diameter of the snap-fit ​​hole 832. This allows the insertion ends of the mating connector 6 and the diverting mating head to pass through the insertion clearance hole 831. Then, under the action of the snap-fit ​​hole 832, the snap-fit ​​part 8 is snapped into the mating slot 800, completing the installation of the mating connector 6 and the diverting mating head.

[0041] Furthermore, the snap-fit ​​piece 81 and the valve body 1 are combined together by a fixing bolt 801. Specifically, the snap-fit ​​piece 81 is provided with a round hole 84 and an oblong hole 85, and the valve body 1 is provided with a fixing screw hole corresponding to the oblong hole 85 and the round hole 84. The screw of the fixing bolt 801 passes through the oblong hole 85 or the round hole 84 and is threaded into the fixing screw hole, thereby realizing the combination and fixation of the snap-fit ​​piece 81 and the valve body 1. In addition, the length of the oblong hole 85 extends from top to bottom, so that when it is necessary to disassemble and assemble the mating joint 6 and the flow divider, it is only necessary to loosen the fixing bolt 801 corresponding to the oblong hole 85 and remove the fixing bolt 801 corresponding to the round hole 84, and then the snap-fit ​​piece 8 can be slid to disengage from the mating groove 800, so that the mating joint 6 and the flow divider can be disassembled and assembled, thereby improving the convenience of disassembly and assembly.

[0042] Furthermore, the buckle body 81 and the two buckle side pieces 82 form a surrounding groove, and a portion of the valve body 1 is inserted into the surrounding groove. Both the left and right ends of the valve body 1 are provided with buckle side slots 105 for the buckle side pieces 82 to be inserted, thereby improving the combination stability of the buckle 8 and the valve body 1. The buckle side slots 105 are integrally formed on the hook part of the valve body 1.

[0043] In this embodiment, both the mating joint 6 and the flow divider mating head are fitted with insert sealing rings 9. The insert sealing ring 9 on the mating joint 6 is used to seal with the wall of the fluid outlet 103, and the insert sealing ring 9 on the flow divider mating head is used to seal with the flow divider 104.

[0044] In this embodiment, the fluid inlet 101 is fitted with a fluid input connector 11 located outside the valve body 1; specifically, the fluid inlet 101 is configured as a threaded hole at least at its inlet end, and the fluid input connector 11 includes a threaded end that mates with the threaded hole.

[0045] In this embodiment, there are two fluid passages arranged symmetrically from left to right. The two fluid passages are used to transport gas and water respectively, so that the same control valve can control the transport of the two fluids. In addition, a lightweight groove 106 is provided on the outside of the valve body 1. The lightweight groove 106 is generated simultaneously during the injection molding or casting of the valve body 1. This not only reduces the material cost of the valve body 1, but also facilitates the production of the valve body 1 by injection molding or casting, thereby reducing production costs.

[0046] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A water and air integrated control valve for use on a dental treatment table, comprising a valve body (1), wherein the valve body (1) has at least one fluid passage, the fluid passage comprising a fluid inlet (101), a mounting channel (102), and a fluid outlet (103); one end of the mounting channel (102) is a mounting port penetrating the valve body (1), characterized in that: The installation channel (102) is provided with a valve core device that can be inserted into the installation port. The valve core device includes a valve core seat (2) with a valve core channel and a piston valve rod (3) with a piston head (31) and a valve rod body (32). The valve core channel is connected to the fluid outlet (103). The piston valve rod (3) is slidably fitted in the valve core channel. The piston head (31) and the valve core channel form a pneumatic control chamber. The valve rod body (32) is configured to control the connection and disconnection between the valve core channel inlet and the fluid inlet (101). A valve cover (4) is installed on the valve body (1) and covers the installation port and restricts and fixes the valve core seat (2) in the installation channel (102). The valve cover (4) is provided with a control air hole (41) that connects to the pneumatic control chamber.

2. The water and gas integrated control valve for dental treatment unit according to claim 1, characterized in that: The valve core channel includes a pneumatic control section (21), a valve core section (22), and a valve core connecting hole (23) disposed in the valve core seat (2), and a valve core groove (24) disposed on the outside of the valve core seat (2). The upper end of the pneumatic control section (21) penetrates the top of the valve core seat (2); the upper end of the valve core section (22) is connected to the pneumatic control section (21), and the lower end penetrates the bottom of the valve core seat (2); the two ends of the valve core connecting hole (23) are connected to the valve core section (22) and the valve core groove (24) respectively; the piston head (31) is disposed in the pneumatic control section (21), and the upper part of the piston head (31) and the pneumatic control section (21) form the pneumatic control cavity; the valve rod body (32) can be moved up and down through the valve core section (22).

3. The water and gas integrated control valve for dental treatment unit according to claim 2, characterized in that: The piston head (31) is fitted with a piston sealing ring (301) that slides and seals against the wall of the pneumatic control section (21). The valve stem body (32) is fitted with an upper sealing ring (302) and a lower sealing ring (303) that slide and seal against the valve core section (22) from top to bottom.

4. The water and gas integrated control valve for dental treatment unit according to claim 1, characterized in that: The pneumatic control section (21) of the valve core channel is provided with a reset spring (5) for driving the piston rod to reset so that the valve core channel inlet is disconnected from the fluid inlet (101). One end of the reset spring (5) is in contact with the piston head (31), and the other end is against the bottom surface of the pneumatic control section (21).

5. The water and gas integrated control valve for dental treatment unit according to claim 1, characterized in that: The installation channel (102) includes a large diameter section and a small diameter section connected sequentially along the axial direction. The connection between the small diameter section and the large diameter section has an installation limiting surface. The valve core seat (2) includes an upper valve core section (25) and a lower valve core section (26) connected sequentially along the axial direction. The upper valve core section (25) is adapted to be installed in the large diameter section and its bottom is pressed against the installation limiting surface. The lower valve core section (26) is adapted to be installed in the upper part of the small diameter section.

6. A water and gas integrated control valve for use in a dental treatment unit according to claim 5, characterized in that: The bottom surface of the valve cover (4) and the upper end of the upper section (25) of the valve core are connected by an upper mounting seal ring (201), and the outer periphery of the lower section (26) of the valve core is fitted with a lower mounting seal ring (202) that contacts and seals with the wall surface of the small diameter section.

7. A water and gas integrated control valve for use in a dental treatment unit according to any one of claims 1-6, characterized in that: The fluid outlet (103) is fitted with a fitting connector (6), the plug end of the fitting connector (6) is inserted into the fluid outlet (103), and the valve body (1) is equipped with a snap-fit ​​fastener (8) for mounting the fitting connector (6), and the fitting connector (6) is provided with a fitting groove (800) for the snap-fit ​​fastener (8) to be snapped into.

8. The water and gas integrated control valve for dental treatment unit according to claim 7, characterized in that: The insertion end of the mating connector (6) is fitted with a plug-in sealing ring (9), which is used to seal with the wall of the fluid outlet (103).

9. A water and gas integrated control valve for use in a dental treatment unit according to any one of claims 1-6, characterized in that: The installation channel (102) is connected to at least one diversion hole (104), and the diversion hole (104) is correspondingly fitted with a separation fitting head. The plug end of the separation fitting head is inserted into the diversion hole (104). The valve body (1) is equipped with a snap-fit ​​fitting (8) for snapping the diversion fitting head. Each diversion fitting head is provided with a fitting groove (800) for the snap-fit ​​fitting (8) to be snapped into.

10. The water and gas integrated control valve for use in a dental treatment unit according to claim 9, characterized in that: The insertion end of the flow divider is fitted with a plug-in sealing ring (9), which is used to seal with the flow divider hole (104).

Images